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{"version":3,"file":"chart.umd.js","sources":["../src/helpers/helpers.core.ts","../src/helpers/helpers.math.ts","../src/helpers/helpers.collection.ts","../src/helpers/helpers.extras.ts","../src/core/core.animator.js","../node_modules/.pnpm/@kurkle+color@0.2.1/node_modules/@kurkle/color/dist/color.esm.js","../src/helpers/helpers.color.ts","../src/core/core.animations.defaults.js","../src/helpers/helpers.intl.ts","../src/core/core.ticks.js","../src/core/core.defaults.js","../src/core/core.layouts.defaults.js","../src/core/core.scale.defaults.js","../src/helpers/helpers.dom.ts","../src/helpers/helpers.canvas.js","../src/helpers/helpers.config.js","../src/helpers/helpers.curve.ts","../src/helpers/helpers.easing.ts","../src/helpers/helpers.interpolation.ts","../src/helpers/helpers.options.ts","../src/helpers/helpers.rtl.ts","../src/helpers/helpers.segment.js","../src/core/core.interaction.js","../src/core/core.layouts.js","../src/platform/platform.base.js","../src/platform/platform.basic.js","../src/platform/platform.dom.js","../src/platform/index.js","../src/core/core.animation.js","../src/core/core.animations.js","../src/core/core.datasetController.js","../src/core/core.element.ts","../src/core/core.scale.autoskip.js","../src/core/core.scale.js","../src/core/core.typedRegistry.js","../src/core/core.registry.js","../src/core/core.plugins.js","../src/core/core.config.js","../src/core/core.controller.js","../src/core/core.adapters.ts","../src/controllers/controller.bar.js","../src/controllers/controller.doughnut.js","../src/controllers/controller.bubble.js","../src/controllers/controller.line.js","../src/controllers/controller.polarArea.js","../src/controllers/controller.pie.js","../src/controllers/controller.radar.js","../src/controllers/controller.scatter.js","../src/elements/element.arc.ts","../src/elements/element.line.js","../src/elements/element.point.ts","../src/elements/element.bar.js","../src/plugins/plugin.colors.ts","../src/plugins/plugin.decimation.js","../src/plugins/plugin.filler/filler.segment.js","../src/plugins/plugin.filler/filler.helper.js","../src/plugins/plugin.filler/filler.options.js","../src/plugins/plugin.filler/filler.target.stack.js","../src/plugins/plugin.filler/simpleArc.js","../src/plugins/plugin.filler/filler.target.js","../src/plugins/plugin.filler/filler.drawing.js","../src/plugins/plugin.filler/index.js","../src/plugins/plugin.legend.js","../src/plugins/plugin.title.js","../src/plugins/plugin.subtitle.js","../src/plugins/plugin.tooltip.js","../src/scales/scale.category.js","../src/scales/scale.linearbase.js","../src/scales/scale.linear.js","../src/scales/scale.logarithmic.js","../src/scales/scale.radialLinear.js","../src/scales/scale.time.js","../src/scales/scale.timeseries.js","../src/index.umd.ts"],"sourcesContent":["/**\n * @namespace Chart.helpers\n */\n\nimport type {AnyObject} from '../../types/basic';\nimport type {ActiveDataPoint, ChartEvent} from '../../types';\n\n/**\n * An empty function that can be used, for example, for optional callback.\n */\nexport function noop() {\n  /* noop */\n}\n\n/**\n * Returns a unique id, sequentially generated from a global variable.\n */\nexport const uid = (() => {\n  let id = 0;\n  return () => id++;\n})();\n\n/**\n * Returns true if `value` is neither null nor undefined, else returns false.\n * @param value - The value to test.\n * @since 2.7.0\n */\nexport function isNullOrUndef(value: unknown): value is null | undefined {\n  return value === null || typeof value === 'undefined';\n}\n\n/**\n * Returns true if `value` is an array (including typed arrays), else returns false.\n * @param value - The value to test.\n * @function\n */\nexport function isArray<T = unknown>(value: unknown): value is T[] {\n  if (Array.isArray && Array.isArray(value)) {\n    return true;\n  }\n  const type = Object.prototype.toString.call(value);\n  if (type.slice(0, 7) === '[object' && type.slice(-6) === 'Array]') {\n    return true;\n  }\n  return false;\n}\n\n/**\n * Returns true if `value` is an object (excluding null), else returns false.\n * @param value - The value to test.\n * @since 2.7.0\n */\nexport function isObject(value: unknown): value is AnyObject {\n  return value !== null && Object.prototype.toString.call(value) === '[object Object]';\n}\n\n/**\n * Returns true if `value` is a finite number, else returns false\n * @param value  - The value to test.\n */\nfunction isNumberFinite(value: unknown): value is number {\n  return (typeof value === 'number' || value instanceof Number) && isFinite(+value);\n}\nexport {\n  isNumberFinite as isFinite,\n};\n\n/**\n * Returns `value` if finite, else returns `defaultValue`.\n * @param value - The value to return if defined.\n * @param defaultValue - The value to return if `value` is not finite.\n */\nexport function finiteOrDefault(value: unknown, defaultValue: number) {\n  return isNumberFinite(value) ? value : defaultValue;\n}\n\n/**\n * Returns `value` if defined, else returns `defaultValue`.\n * @param value - The value to return if defined.\n * @param defaultValue - The value to return if `value` is undefined.\n */\nexport function valueOrDefault<T>(value: T | undefined, defaultValue: T) {\n  return typeof value === 'undefined' ? defaultValue : value;\n}\n\nexport const toPercentage = (value: number | string, dimension: number) =>\n  typeof value === 'string' && value.endsWith('%') ?\n    parseFloat(value) / 100\n    : +value / dimension;\n\nexport const toDimension = (value: number | string, dimension: number) =>\n  typeof value === 'string' && value.endsWith('%') ?\n    parseFloat(value) / 100 * dimension\n    : +value;\n\n/**\n * Calls `fn` with the given `args` in the scope defined by `thisArg` and returns the\n * value returned by `fn`. If `fn` is not a function, this method returns undefined.\n * @param fn - The function to call.\n * @param args - The arguments with which `fn` should be called.\n * @param [thisArg] - The value of `this` provided for the call to `fn`.\n */\nexport function callback<T extends (this: TA, ...restArgs: unknown[]) => R, TA, R>(\n  fn: T | undefined,\n  args: unknown[],\n  thisArg?: TA\n): R | undefined {\n  if (fn && typeof fn.call === 'function') {\n    return fn.apply(thisArg, args);\n  }\n}\n\n/**\n * Note(SB) for performance sake, this method should only be used when loopable type\n * is unknown or in none intensive code (not called often and small loopable). Else\n * it's preferable to use a regular for() loop and save extra function calls.\n * @param loopable - The object or array to be iterated.\n * @param fn - The function to call for each item.\n * @param [thisArg] - The value of `this` provided for the call to `fn`.\n * @param [reverse] - If true, iterates backward on the loopable.\n */\nexport function each<T, TA>(\n  loopable: Record<string, T>,\n  fn: (this: TA, v: T, i: string) => void,\n  thisArg?: TA,\n  reverse?: boolean\n): void;\nexport function each<T, TA>(\n  loopable: T[],\n  fn: (this: TA, v: T, i: number) => void,\n  thisArg?: TA,\n  reverse?: boolean\n): void;\nexport function each<T, TA>(\n  loopable: T[] | Record<string, T>,\n  fn: (this: TA, v: T, i: any) => void,\n  thisArg?: TA,\n  reverse?: boolean\n) {\n  let i: number, len: number, keys: string[];\n  if (isArray(loopable)) {\n    len = loopable.length;\n    if (reverse) {\n      for (i = len - 1; i >= 0; i--) {\n        fn.call(thisArg, loopable[i], i);\n      }\n    } else {\n      for (i = 0; i < len; i++) {\n        fn.call(thisArg, loopable[i], i);\n      }\n    }\n  } else if (isObject(loopable)) {\n    keys = Object.keys(loopable);\n    len = keys.length;\n    for (i = 0; i < len; i++) {\n      fn.call(thisArg, loopable[keys[i]], keys[i]);\n    }\n  }\n}\n\n/**\n * Returns true if the `a0` and `a1` arrays have the same content, else returns false.\n * @param a0 - The array to compare\n * @param a1 - The array to compare\n * @private\n */\nexport function _elementsEqual(a0: ActiveDataPoint[], a1: ActiveDataPoint[]) {\n  let i: number, ilen: number, v0: ActiveDataPoint, v1: ActiveDataPoint;\n\n  if (!a0 || !a1 || a0.length !== a1.length) {\n    return false;\n  }\n\n  for (i = 0, ilen = a0.length; i < ilen; ++i) {\n    v0 = a0[i];\n    v1 = a1[i];\n\n    if (v0.datasetIndex !== v1.datasetIndex || v0.index !== v1.index) {\n      return false;\n    }\n  }\n\n  return true;\n}\n\n/**\n * Returns a deep copy of `source` without keeping references on objects and arrays.\n * @param source - The value to clone.\n */\nexport function clone<T>(source: T): T {\n  if (isArray(source)) {\n    return source.map(clone) as unknown as T;\n  }\n\n  if (isObject(source)) {\n    const target = Object.create(null);\n    const keys = Object.keys(source);\n    const klen = keys.length;\n    let k = 0;\n\n    for (; k < klen; ++k) {\n      target[keys[k]] = clone(source[keys[k]]);\n    }\n\n    return target;\n  }\n\n  return source;\n}\n\nfunction isValidKey(key: string) {\n  return ['__proto__', 'prototype', 'constructor'].indexOf(key) === -1;\n}\n\n/**\n * The default merger when Chart.helpers.merge is called without merger option.\n * Note(SB): also used by mergeConfig and mergeScaleConfig as fallback.\n * @private\n */\nexport function _merger(key: string, target: AnyObject, source: AnyObject, options: AnyObject) {\n  if (!isValidKey(key)) {\n    return;\n  }\n\n  const tval = target[key];\n  const sval = source[key];\n\n  if (isObject(tval) && isObject(sval)) {\n    // eslint-disable-next-line @typescript-eslint/no-use-before-define\n    merge(tval, sval, options);\n  } else {\n    target[key] = clone(sval);\n  }\n}\n\nexport interface MergeOptions {\n  merger?: (key: string, target: AnyObject, source: AnyObject, options?: AnyObject) => void;\n}\n\n/**\n * Recursively deep copies `source` properties into `target` with the given `options`.\n * IMPORTANT: `target` is not cloned and will be updated with `source` properties.\n * @param target - The target object in which all sources are merged into.\n * @param source - Object(s) to merge into `target`.\n * @param [options] - Merging options:\n * @param [options.merger] - The merge method (key, target, source, options)\n * @returns The `target` object.\n */\nexport function merge<T>(target: T, source: [], options?: MergeOptions): T;\nexport function merge<T, S1>(target: T, source: S1, options?: MergeOptions): T & S1;\nexport function merge<T, S1>(target: T, source: [S1], options?: MergeOptions): T & S1;\nexport function merge<T, S1, S2>(target: T, source: [S1, S2], options?: MergeOptions): T & S1 & S2;\nexport function merge<T, S1, S2, S3>(target: T, source: [S1, S2, S3], options?: MergeOptions): T & S1 & S2 & S3;\nexport function merge<T, S1, S2, S3, S4>(\n  target: T,\n  source: [S1, S2, S3, S4],\n  options?: MergeOptions\n): T & S1 & S2 & S3 & S4;\nexport function merge<T>(target: T, source: AnyObject[], options?: MergeOptions): AnyObject;\nexport function merge<T>(target: T, source: AnyObject[], options?: MergeOptions): AnyObject {\n  const sources = isArray(source) ? source : [source];\n  const ilen = sources.length;\n\n  if (!isObject(target)) {\n    return target as AnyObject;\n  }\n\n  options = options || {};\n  const merger = options.merger || _merger;\n  let current: AnyObject;\n\n  for (let i = 0; i < ilen; ++i) {\n    current = sources[i];\n    if (!isObject(current)) {\n      continue;\n    }\n\n    const keys = Object.keys(current);\n    for (let k = 0, klen = keys.length; k < klen; ++k) {\n      merger(keys[k], target, current, options as AnyObject);\n    }\n  }\n\n  return target;\n}\n\n/**\n * Recursively deep copies `source` properties into `target` *only* if not defined in target.\n * IMPORTANT: `target` is not cloned and will be updated with `source` properties.\n * @param target - The target object in which all sources are merged into.\n * @param source - Object(s) to merge into `target`.\n * @returns The `target` object.\n */\nexport function mergeIf<T>(target: T, source: []): T;\nexport function mergeIf<T, S1>(target: T, source: S1): T & S1;\nexport function mergeIf<T, S1>(target: T, source: [S1]): T & S1;\nexport function mergeIf<T, S1, S2>(target: T, source: [S1, S2]): T & S1 & S2;\nexport function mergeIf<T, S1, S2, S3>(target: T, source: [S1, S2, S3]): T & S1 & S2 & S3;\nexport function mergeIf<T, S1, S2, S3, S4>(target: T, source: [S1, S2, S3, S4]): T & S1 & S2 & S3 & S4;\nexport function mergeIf<T>(target: T, source: AnyObject[]): AnyObject;\nexport function mergeIf<T>(target: T, source: AnyObject[]): AnyObject {\n  // eslint-disable-next-line @typescript-eslint/no-use-before-define\n  return merge<T>(target, source, {merger: _mergerIf});\n}\n\n/**\n * Merges source[key] in target[key] only if target[key] is undefined.\n * @private\n */\nexport function _mergerIf(key: string, target: AnyObject, source: AnyObject) {\n  if (!isValidKey(key)) {\n    return;\n  }\n\n  const tval = target[key];\n  const sval = source[key];\n\n  if (isObject(tval) && isObject(sval)) {\n    mergeIf(tval, sval);\n  } else if (!Object.prototype.hasOwnProperty.call(target, key)) {\n    target[key] = clone(sval);\n  }\n}\n\n/**\n * @private\n */\nexport function _deprecated(scope: string, value: unknown, previous: string, current: string) {\n  if (value !== undefined) {\n    console.warn(scope + ': \"' + previous +\n      '\" is deprecated. Please use \"' + current + '\" instead');\n  }\n}\n\n// resolveObjectKey resolver cache\nconst keyResolvers = {\n  // Chart.helpers.core resolveObjectKey should resolve empty key to root object\n  '': v => v,\n  // default resolvers\n  x: o => o.x,\n  y: o => o.y\n};\n\n/**\n * @private\n */\nexport function _splitKey(key: string) {\n  const parts = key.split('.');\n  const keys: string[] = [];\n  let tmp = '';\n  for (const part of parts) {\n    tmp += part;\n    if (tmp.endsWith('\\\\')) {\n      tmp = tmp.slice(0, -1) + '.';\n    } else {\n      keys.push(tmp);\n      tmp = '';\n    }\n  }\n  return keys;\n}\n\nfunction _getKeyResolver(key: string) {\n  const keys = _splitKey(key);\n  return obj => {\n    for (const k of keys) {\n      if (k === '') {\n        // For backward compatibility:\n        // Chart.helpers.core resolveObjectKey should break at empty key\n        break;\n      }\n      obj = obj && obj[k];\n    }\n    return obj;\n  };\n}\n\nexport function resolveObjectKey(obj: AnyObject, key: string): AnyObject {\n  const resolver = keyResolvers[key] || (keyResolvers[key] = _getKeyResolver(key));\n  return resolver(obj);\n}\n\n/**\n * @private\n */\nexport function _capitalize(str: string) {\n  return str.charAt(0).toUpperCase() + str.slice(1);\n}\n\n\nexport const defined = (value: unknown) => typeof value !== 'undefined';\n\nexport const isFunction = (value: unknown): value is (...args: any[]) => any => typeof value === 'function';\n\n// Adapted from https://stackoverflow.com/questions/31128855/comparing-ecma6-sets-for-equality#31129384\nexport const setsEqual = <T>(a: Set<T>, b: Set<T>) => {\n  if (a.size !== b.size) {\n    return false;\n  }\n\n  for (const item of a) {\n    if (!b.has(item)) {\n      return false;\n    }\n  }\n\n  return true;\n};\n\n/**\n * @param e - The event\n * @private\n */\nexport function _isClickEvent(e: ChartEvent) {\n  return e.type === 'mouseup' || e.type === 'click' || e.type === 'contextmenu';\n}\n","import type {Point} from '../../types/geometric';\nimport {isFinite as isFiniteNumber} from './helpers.core';\n\n/**\n * @alias Chart.helpers.math\n * @namespace\n */\n\nexport const PI = Math.PI;\nexport const TAU = 2 * PI;\nexport const PITAU = TAU + PI;\nexport const INFINITY = Number.POSITIVE_INFINITY;\nexport const RAD_PER_DEG = PI / 180;\nexport const HALF_PI = PI / 2;\nexport const QUARTER_PI = PI / 4;\nexport const TWO_THIRDS_PI = PI * 2 / 3;\n\nexport const log10 = Math.log10;\nexport const sign = Math.sign;\n\nexport function almostEquals(x: number, y: number, epsilon: number) {\n  return Math.abs(x - y) < epsilon;\n}\n\n/**\n * Implementation of the nice number algorithm used in determining where axis labels will go\n */\nexport function niceNum(range: number) {\n  const roundedRange = Math.round(range);\n  range = almostEquals(range, roundedRange, range / 1000) ? roundedRange : range;\n  const niceRange = Math.pow(10, Math.floor(log10(range)));\n  const fraction = range / niceRange;\n  const niceFraction = fraction <= 1 ? 1 : fraction <= 2 ? 2 : fraction <= 5 ? 5 : 10;\n  return niceFraction * niceRange;\n}\n\n/**\n * Returns an array of factors sorted from 1 to sqrt(value)\n * @private\n */\nexport function _factorize(value: number) {\n  const result: number[] = [];\n  const sqrt = Math.sqrt(value);\n  let i: number;\n\n  for (i = 1; i < sqrt; i++) {\n    if (value % i === 0) {\n      result.push(i);\n      result.push(value / i);\n    }\n  }\n  if (sqrt === (sqrt | 0)) { // if value is a square number\n    result.push(sqrt);\n  }\n\n  result.sort((a, b) => a - b).pop();\n  return result;\n}\n\nexport function isNumber(n: unknown): n is number {\n  return !isNaN(parseFloat(n as string)) && isFinite(n as number);\n}\n\nexport function almostWhole(x: number, epsilon: number) {\n  const rounded = Math.round(x);\n  return ((rounded - epsilon) <= x) && ((rounded + epsilon) >= x);\n}\n\n/**\n * @private\n */\nexport function _setMinAndMaxByKey(\n  array: Record<string, number>[],\n  target: { min: number, max: number },\n  property: string\n) {\n  let i: number, ilen: number, value: number;\n\n  for (i = 0, ilen = array.length; i < ilen; i++) {\n    value = array[i][property];\n    if (!isNaN(value)) {\n      target.min = Math.min(target.min, value);\n      target.max = Math.max(target.max, value);\n    }\n  }\n}\n\nexport function toRadians(degrees: number) {\n  return degrees * (PI / 180);\n}\n\nexport function toDegrees(radians: number) {\n  return radians * (180 / PI);\n}\n\n/**\n * Returns the number of decimal places\n * i.e. the number of digits after the decimal point, of the value of this Number.\n * @param x - A number.\n * @returns The number of decimal places.\n * @private\n */\nexport function _decimalPlaces(x: number) {\n  if (!isFiniteNumber(x)) {\n    return;\n  }\n  let e = 1;\n  let p = 0;\n  while (Math.round(x * e) / e !== x) {\n    e *= 10;\n    p++;\n  }\n  return p;\n}\n\n// Gets the angle from vertical upright to the point about a centre.\nexport function getAngleFromPoint(\n  centrePoint: Point,\n  anglePoint: Point\n) {\n  const distanceFromXCenter = anglePoint.x - centrePoint.x;\n  const distanceFromYCenter = anglePoint.y - centrePoint.y;\n  const radialDistanceFromCenter = Math.sqrt(distanceFromXCenter * distanceFromXCenter + distanceFromYCenter * distanceFromYCenter);\n\n  let angle = Math.atan2(distanceFromYCenter, distanceFromXCenter);\n\n  if (angle < (-0.5 * PI)) {\n    angle += TAU; // make sure the returned angle is in the range of (-PI/2, 3PI/2]\n  }\n\n  return {\n    angle,\n    distance: radialDistanceFromCenter\n  };\n}\n\nexport function distanceBetweenPoints(pt1: Point, pt2: Point) {\n  return Math.sqrt(Math.pow(pt2.x - pt1.x, 2) + Math.pow(pt2.y - pt1.y, 2));\n}\n\n/**\n * Shortest distance between angles, in either direction.\n * @private\n */\nexport function _angleDiff(a: number, b: number) {\n  return (a - b + PITAU) % TAU - PI;\n}\n\n/**\n * Normalize angle to be between 0 and 2*PI\n * @private\n */\nexport function _normalizeAngle(a: number) {\n  return (a % TAU + TAU) % TAU;\n}\n\n/**\n * @private\n */\nexport function _angleBetween(angle: number, start: number, end: number, sameAngleIsFullCircle?: boolean) {\n  const a = _normalizeAngle(angle);\n  const s = _normalizeAngle(start);\n  const e = _normalizeAngle(end);\n  const angleToStart = _normalizeAngle(s - a);\n  const angleToEnd = _normalizeAngle(e - a);\n  const startToAngle = _normalizeAngle(a - s);\n  const endToAngle = _normalizeAngle(a - e);\n  return a === s || a === e || (sameAngleIsFullCircle && s === e)\n    || (angleToStart > angleToEnd && startToAngle < endToAngle);\n}\n\n/**\n * Limit `value` between `min` and `max`\n * @param value\n * @param min\n * @param max\n * @private\n */\nexport function _limitValue(value: number, min: number, max: number) {\n  return Math.max(min, Math.min(max, value));\n}\n\n/**\n * @param {number} value\n * @private\n */\nexport function _int16Range(value: number) {\n  return _limitValue(value, -32768, 32767);\n}\n\n/**\n * @param value\n * @param start\n * @param end\n * @param [epsilon]\n * @private\n */\nexport function _isBetween(value: number, start: number, end: number, epsilon = 1e-6) {\n  return value >= Math.min(start, end) - epsilon && value <= Math.max(start, end) + epsilon;\n}\n","import {_capitalize} from './helpers.core';\n\n/**\n * Binary search\n * @param table - the table search. must be sorted!\n * @param value - value to find\n * @param cmp\n * @private\n */\nexport function _lookup(\n  table: number[],\n  value: number,\n  cmp?: (value: number) => boolean\n): {lo: number, hi: number};\nexport function _lookup<T>(\n  table: T[],\n  value: number,\n  cmp: (value: number) => boolean\n): {lo: number, hi: number};\nexport function _lookup(\n  table: unknown[],\n  value: number,\n  cmp?: (value: number) => boolean\n) {\n  cmp = cmp || ((index) => table[index] < value);\n  let hi = table.length - 1;\n  let lo = 0;\n  let mid: number;\n\n  while (hi - lo > 1) {\n    mid = (lo + hi) >> 1;\n    if (cmp(mid)) {\n      lo = mid;\n    } else {\n      hi = mid;\n    }\n  }\n\n  return {lo, hi};\n}\n\n/**\n * Binary search\n * @param table - the table search. must be sorted!\n * @param key - property name for the value in each entry\n * @param value - value to find\n * @param last - lookup last index\n * @private\n */\nexport const _lookupByKey = (\n  table: Record<string, number>[],\n  key: string,\n  value: number,\n  last?: boolean\n) =>\n  _lookup(table, value, last\n    ? index => {\n      const ti = table[index][key];\n      return ti < value || ti === value && table[index + 1][key] === value;\n    }\n    : index => table[index][key] < value);\n\n/**\n * Reverse binary search\n * @param table - the table search. must be sorted!\n * @param key - property name for the value in each entry\n * @param value - value to find\n * @private\n */\nexport const _rlookupByKey = (\n  table: Record<string, number>[],\n  key: string,\n  value: number\n) =>\n  _lookup(table, value, index => table[index][key] >= value);\n\n/**\n * Return subset of `values` between `min` and `max` inclusive.\n * Values are assumed to be in sorted order.\n * @param values - sorted array of values\n * @param min - min value\n * @param max - max value\n */\nexport function _filterBetween(values: number[], min: number, max: number) {\n  let start = 0;\n  let end = values.length;\n\n  while (start < end && values[start] < min) {\n    start++;\n  }\n  while (end > start && values[end - 1] > max) {\n    end--;\n  }\n\n  return start > 0 || end < values.length\n    ? values.slice(start, end)\n    : values;\n}\n\nconst arrayEvents = ['push', 'pop', 'shift', 'splice', 'unshift'] as const;\n\nexport interface ArrayListener<T> {\n  _onDataPush?(...item: T[]): void;\n  _onDataPop?(): void;\n  _onDataShift?(): void;\n  _onDataSplice?(index: number, deleteCount: number, ...items: T[]): void;\n  _onDataUnshift?(...item: T[]): void;\n}\n\n/**\n * Hooks the array methods that add or remove values ('push', pop', 'shift', 'splice',\n * 'unshift') and notify the listener AFTER the array has been altered. Listeners are\n * called on the '_onData*' callbacks (e.g. _onDataPush, etc.) with same arguments.\n */\nexport function listenArrayEvents<T>(array: T[], listener: ArrayListener<T>): void;\nexport function listenArrayEvents(array, listener) {\n  if (array._chartjs) {\n    array._chartjs.listeners.push(listener);\n    return;\n  }\n\n  Object.defineProperty(array, '_chartjs', {\n    configurable: true,\n    enumerable: false,\n    value: {\n      listeners: [listener]\n    }\n  });\n\n  arrayEvents.forEach((key) => {\n    const method = '_onData' + _capitalize(key);\n    const base = array[key];\n\n    Object.defineProperty(array, key, {\n      configurable: true,\n      enumerable: false,\n      value(...args) {\n        const res = base.apply(this, args);\n\n        array._chartjs.listeners.forEach((object) => {\n          if (typeof object[method] === 'function') {\n            object[method](...args);\n          }\n        });\n\n        return res;\n      }\n    });\n  });\n}\n\n\n/**\n * Removes the given array event listener and cleanup extra attached properties (such as\n * the _chartjs stub and overridden methods) if array doesn't have any more listeners.\n */\nexport function unlistenArrayEvents<T>(array: T[], listener: ArrayListener<T>): void;\nexport function unlistenArrayEvents(array, listener) {\n  const stub = array._chartjs;\n  if (!stub) {\n    return;\n  }\n\n  const listeners = stub.listeners;\n  const index = listeners.indexOf(listener);\n  if (index !== -1) {\n    listeners.splice(index, 1);\n  }\n\n  if (listeners.length > 0) {\n    return;\n  }\n\n  arrayEvents.forEach((key) => {\n    delete array[key];\n  });\n\n  delete array._chartjs;\n}\n\n/**\n * @param items\n */\nexport function _arrayUnique<T>(items: T[]) {\n  const set = new Set<T>();\n  let i: number, ilen: number;\n\n  for (i = 0, ilen = items.length; i < ilen; ++i) {\n    set.add(items[i]);\n  }\n\n  if (set.size === ilen) {\n    return items;\n  }\n\n  return Array.from(set);\n}\n","import {type ChartMeta, type PointElement} from '../../types';\n\nimport {_limitValue} from './helpers.math';\nimport {_lookupByKey} from './helpers.collection';\n\nexport function fontString(pixelSize: number, fontStyle: string, fontFamily: string) {\n  return fontStyle + ' ' + pixelSize + 'px ' + fontFamily;\n}\n\n/**\n* Request animation polyfill\n*/\nexport const requestAnimFrame = (function() {\n  if (typeof window === 'undefined') {\n    return function(callback) {\n      return callback();\n    };\n  }\n  return window.requestAnimationFrame;\n}());\n\n/**\n * Throttles calling `fn` once per animation frame\n * Latest arguments are used on the actual call\n */\nexport function throttled<TArgs extends Array<any>>(\n  fn: (...args: TArgs) => void,\n  thisArg: any,\n) {\n  let ticking = false;\n\n  return function(...args: TArgs) {\n    if (!ticking) {\n      ticking = true;\n      requestAnimFrame.call(window, () => {\n        ticking = false;\n        fn.apply(thisArg, args);\n      });\n    }\n  };\n}\n\n/**\n * Debounces calling `fn` for `delay` ms\n */\nexport function debounce<TArgs extends Array<any>>(fn: (...args: TArgs) => void, delay: number) {\n  let timeout;\n  return function(...args: TArgs) {\n    if (delay) {\n      clearTimeout(timeout);\n      timeout = setTimeout(fn, delay, args);\n    } else {\n      fn.apply<any, TArgs, void>(this, args);\n    }\n    return delay;\n  };\n}\n\n/**\n * Converts 'start' to 'left', 'end' to 'right' and others to 'center'\n * @private\n */\nexport const _toLeftRightCenter = (align: 'start' | 'end' | 'center') => align === 'start' ? 'left' : align === 'end' ? 'right' : 'center';\n\n/**\n * Returns `start`, `end` or `(start + end) / 2` depending on `align`. Defaults to `center`\n * @private\n */\nexport const _alignStartEnd = (align: 'start' | 'end' | 'center', start: number, end: number) => align === 'start' ? start : align === 'end' ? end : (start + end) / 2;\n\n/**\n * Returns `left`, `right` or `(left + right) / 2` depending on `align`. Defaults to `left`\n * @private\n */\nexport const _textX = (align: 'left' | 'right' | 'center', left: number, right: number, rtl: boolean) => {\n  const check = rtl ? 'left' : 'right';\n  return align === check ? right : align === 'center' ? (left + right) / 2 : left;\n};\n\n/**\n * Return start and count of visible points.\n * @private\n */\nexport function _getStartAndCountOfVisiblePoints(meta: ChartMeta<'line' | 'scatter'>, points: PointElement[], animationsDisabled: boolean) {\n  const pointCount = points.length;\n\n  let start = 0;\n  let count = pointCount;\n\n  if (meta._sorted) {\n    const {iScale, _parsed} = meta;\n    const axis = iScale.axis;\n    const {min, max, minDefined, maxDefined} = iScale.getUserBounds();\n\n    if (minDefined) {\n      start = _limitValue(Math.min(\n        // @ts-expect-error Need to type _parsed\n        _lookupByKey(_parsed, iScale.axis, min).lo,\n        // @ts-expect-error Need to fix types on _lookupByKey\n        animationsDisabled ? pointCount : _lookupByKey(points, axis, iScale.getPixelForValue(min)).lo),\n      0, pointCount - 1);\n    }\n    if (maxDefined) {\n      count = _limitValue(Math.max(\n        // @ts-expect-error Need to type _parsed\n        _lookupByKey(_parsed, iScale.axis, max, true).hi + 1,\n        // @ts-expect-error Need to fix types on _lookupByKey\n        animationsDisabled ? 0 : _lookupByKey(points, axis, iScale.getPixelForValue(max), true).hi + 1),\n      start, pointCount) - start;\n    } else {\n      count = pointCount - start;\n    }\n  }\n\n  return {start, count};\n}\n\n/**\n * Checks if the scale ranges have changed.\n * @param {object} meta - dataset meta.\n * @returns {boolean}\n * @private\n */\nexport function _scaleRangesChanged(meta) {\n  const {xScale, yScale, _scaleRanges} = meta;\n  const newRanges = {\n    xmin: xScale.min,\n    xmax: xScale.max,\n    ymin: yScale.min,\n    ymax: yScale.max\n  };\n  if (!_scaleRanges) {\n    meta._scaleRanges = newRanges;\n    return true;\n  }\n  const changed = _scaleRanges.xmin !== xScale.min\n\t\t|| _scaleRanges.xmax !== xScale.max\n\t\t|| _scaleRanges.ymin !== yScale.min\n\t\t|| _scaleRanges.ymax !== yScale.max;\n\n  Object.assign(_scaleRanges, newRanges);\n  return changed;\n}\n","import {requestAnimFrame} from '../helpers/helpers.extras';\n\n/**\n * @typedef { import(\"./core.animation\").default } Animation\n * @typedef { import(\"./core.controller\").default } Chart\n */\n\n/**\n * Please use the module's default export which provides a singleton instance\n * Note: class is export for typedoc\n */\nexport class Animator {\n  constructor() {\n    this._request = null;\n    this._charts = new Map();\n    this._running = false;\n    this._lastDate = undefined;\n  }\n\n  /**\n\t * @private\n\t */\n  _notify(chart, anims, date, type) {\n    const callbacks = anims.listeners[type];\n    const numSteps = anims.duration;\n\n    callbacks.forEach(fn => fn({\n      chart,\n      initial: anims.initial,\n      numSteps,\n      currentStep: Math.min(date - anims.start, numSteps)\n    }));\n  }\n\n  /**\n\t * @private\n\t */\n  _refresh() {\n    if (this._request) {\n      return;\n    }\n    this._running = true;\n\n    this._request = requestAnimFrame.call(window, () => {\n      this._update();\n      this._request = null;\n\n      if (this._running) {\n        this._refresh();\n      }\n    });\n  }\n\n  /**\n\t * @private\n\t */\n  _update(date = Date.now()) {\n    let remaining = 0;\n\n    this._charts.forEach((anims, chart) => {\n      if (!anims.running || !anims.items.length) {\n        return;\n      }\n      const items = anims.items;\n      let i = items.length - 1;\n      let draw = false;\n      let item;\n\n      for (; i >= 0; --i) {\n        item = items[i];\n\n        if (item._active) {\n          if (item._total > anims.duration) {\n            // if the animation has been updated and its duration prolonged,\n            // update to total duration of current animations run (for progress event)\n            anims.duration = item._total;\n          }\n          item.tick(date);\n          draw = true;\n        } else {\n          // Remove the item by replacing it with last item and removing the last\n          // A lot faster than splice.\n          items[i] = items[items.length - 1];\n          items.pop();\n        }\n      }\n\n      if (draw) {\n        chart.draw();\n        this._notify(chart, anims, date, 'progress');\n      }\n\n      if (!items.length) {\n        anims.running = false;\n        this._notify(chart, anims, date, 'complete');\n        anims.initial = false;\n      }\n\n      remaining += items.length;\n    });\n\n    this._lastDate = date;\n\n    if (remaining === 0) {\n      this._running = false;\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _getAnims(chart) {\n    const charts = this._charts;\n    let anims = charts.get(chart);\n    if (!anims) {\n      anims = {\n        running: false,\n        initial: true,\n        items: [],\n        listeners: {\n          complete: [],\n          progress: []\n        }\n      };\n      charts.set(chart, anims);\n    }\n    return anims;\n  }\n\n  /**\n\t * @param {Chart} chart\n\t * @param {string} event - event name\n\t * @param {Function} cb - callback\n\t */\n  listen(chart, event, cb) {\n    this._getAnims(chart).listeners[event].push(cb);\n  }\n\n  /**\n\t * Add animations\n\t * @param {Chart} chart\n\t * @param {Animation[]} items - animations\n\t */\n  add(chart, items) {\n    if (!items || !items.length) {\n      return;\n    }\n    this._getAnims(chart).items.push(...items);\n  }\n\n  /**\n\t * Counts number of active animations for the chart\n\t * @param {Chart} chart\n\t */\n  has(chart) {\n    return this._getAnims(chart).items.length > 0;\n  }\n\n  /**\n\t * Start animating (all charts)\n\t * @param {Chart} chart\n\t */\n  start(chart) {\n    const anims = this._charts.get(chart);\n    if (!anims) {\n      return;\n    }\n    anims.running = true;\n    anims.start = Date.now();\n    anims.duration = anims.items.reduce((acc, cur) => Math.max(acc, cur._duration), 0);\n    this._refresh();\n  }\n\n  running(chart) {\n    if (!this._running) {\n      return false;\n    }\n    const anims = this._charts.get(chart);\n    if (!anims || !anims.running || !anims.items.length) {\n      return false;\n    }\n    return true;\n  }\n\n  /**\n\t * Stop all animations for the chart\n\t * @param {Chart} chart\n\t */\n  stop(chart) {\n    const anims = this._charts.get(chart);\n    if (!anims || !anims.items.length) {\n      return;\n    }\n    const items = anims.items;\n    let i = items.length - 1;\n\n    for (; i >= 0; --i) {\n      items[i].cancel();\n    }\n    anims.items = [];\n    this._notify(chart, anims, Date.now(), 'complete');\n  }\n\n  /**\n\t * Remove chart from Animator\n\t * @param {Chart} chart\n\t */\n  remove(chart) {\n    return this._charts.delete(chart);\n  }\n}\n\n// singleton instance\nexport default /* #__PURE__ */ new Animator();\n","/*!\n * @kurkle/color v0.2.1\n * https://github.com/kurkle/color#readme\n * (c) 2022 Jukka Kurkela\n * Released under the MIT License\n */\nfunction round(v) {\n  return v + 0.5 | 0;\n}\nconst lim = (v, l, h) => Math.max(Math.min(v, h), l);\nfunction p2b(v) {\n  return lim(round(v * 2.55), 0, 255);\n}\nfunction b2p(v) {\n  return lim(round(v / 2.55), 0, 100);\n}\nfunction n2b(v) {\n  return lim(round(v * 255), 0, 255);\n}\nfunction b2n(v) {\n  return lim(round(v / 2.55) / 100, 0, 1);\n}\nfunction n2p(v) {\n  return lim(round(v * 100), 0, 100);\n}\n\nconst map$1 = {0: 0, 1: 1, 2: 2, 3: 3, 4: 4, 5: 5, 6: 6, 7: 7, 8: 8, 9: 9, A: 10, B: 11, C: 12, D: 13, E: 14, F: 15, a: 10, b: 11, c: 12, d: 13, e: 14, f: 15};\nconst hex = [...'0123456789ABCDEF'];\nconst h1 = b => hex[b & 0xF];\nconst h2 = b => hex[(b & 0xF0) >> 4] + hex[b & 0xF];\nconst eq = b => ((b & 0xF0) >> 4) === (b & 0xF);\nconst isShort = v => eq(v.r) && eq(v.g) && eq(v.b) && eq(v.a);\nfunction hexParse(str) {\n  var len = str.length;\n  var ret;\n  if (str[0] === '#') {\n    if (len === 4 || len === 5) {\n      ret = {\n        r: 255 & map$1[str[1]] * 17,\n        g: 255 & map$1[str[2]] * 17,\n        b: 255 & map$1[str[3]] * 17,\n        a: len === 5 ? map$1[str[4]] * 17 : 255\n      };\n    } else if (len === 7 || len === 9) {\n      ret = {\n        r: map$1[str[1]] << 4 | map$1[str[2]],\n        g: map$1[str[3]] << 4 | map$1[str[4]],\n        b: map$1[str[5]] << 4 | map$1[str[6]],\n        a: len === 9 ? (map$1[str[7]] << 4 | map$1[str[8]]) : 255\n      };\n    }\n  }\n  return ret;\n}\nconst alpha = (a, f) => a < 255 ? f(a) : '';\nfunction hexString(v) {\n  var f = isShort(v) ? h1 : h2;\n  return v\n    ? '#' + f(v.r) + f(v.g) + f(v.b) + alpha(v.a, f)\n    : undefined;\n}\n\nconst HUE_RE = /^(hsla?|hwb|hsv)\\(\\s*([-+.e\\d]+)(?:deg)?[\\s,]+([-+.e\\d]+)%[\\s,]+([-+.e\\d]+)%(?:[\\s,]+([-+.e\\d]+)(%)?)?\\s*\\)$/;\nfunction hsl2rgbn(h, s, l) {\n  const a = s * Math.min(l, 1 - l);\n  const f = (n, k = (n + h / 30) % 12) => l - a * Math.max(Math.min(k - 3, 9 - k, 1), -1);\n  return [f(0), f(8), f(4)];\n}\nfunction hsv2rgbn(h, s, v) {\n  const f = (n, k = (n + h / 60) % 6) => v - v * s * Math.max(Math.min(k, 4 - k, 1), 0);\n  return [f(5), f(3), f(1)];\n}\nfunction hwb2rgbn(h, w, b) {\n  const rgb = hsl2rgbn(h, 1, 0.5);\n  let i;\n  if (w + b > 1) {\n    i = 1 / (w + b);\n    w *= i;\n    b *= i;\n  }\n  for (i = 0; i < 3; i++) {\n    rgb[i] *= 1 - w - b;\n    rgb[i] += w;\n  }\n  return rgb;\n}\nfunction hueValue(r, g, b, d, max) {\n  if (r === max) {\n    return ((g - b) / d) + (g < b ? 6 : 0);\n  }\n  if (g === max) {\n    return (b - r) / d + 2;\n  }\n  return (r - g) / d + 4;\n}\nfunction rgb2hsl(v) {\n  const range = 255;\n  const r = v.r / range;\n  const g = v.g / range;\n  const b = v.b / range;\n  const max = Math.max(r, g, b);\n  const min = Math.min(r, g, b);\n  const l = (max + min) / 2;\n  let h, s, d;\n  if (max !== min) {\n    d = max - min;\n    s = l > 0.5 ? d / (2 - max - min) : d / (max + min);\n    h = hueValue(r, g, b, d, max);\n    h = h * 60 + 0.5;\n  }\n  return [h | 0, s || 0, l];\n}\nfunction calln(f, a, b, c) {\n  return (\n    Array.isArray(a)\n      ? f(a[0], a[1], a[2])\n      : f(a, b, c)\n  ).map(n2b);\n}\nfunction hsl2rgb(h, s, l) {\n  return calln(hsl2rgbn, h, s, l);\n}\nfunction hwb2rgb(h, w, b) {\n  return calln(hwb2rgbn, h, w, b);\n}\nfunction hsv2rgb(h, s, v) {\n  return calln(hsv2rgbn, h, s, v);\n}\nfunction hue(h) {\n  return (h % 360 + 360) % 360;\n}\nfunction hueParse(str) {\n  const m = HUE_RE.exec(str);\n  let a = 255;\n  let v;\n  if (!m) {\n    return;\n  }\n  if (m[5] !== v) {\n    a = m[6] ? p2b(+m[5]) : n2b(+m[5]);\n  }\n  const h = hue(+m[2]);\n  const p1 = +m[3] / 100;\n  const p2 = +m[4] / 100;\n  if (m[1] === 'hwb') {\n    v = hwb2rgb(h, p1, p2);\n  } else if (m[1] === 'hsv') {\n    v = hsv2rgb(h, p1, p2);\n  } else {\n    v = hsl2rgb(h, p1, p2);\n  }\n  return {\n    r: v[0],\n    g: v[1],\n    b: v[2],\n    a: a\n  };\n}\nfunction rotate(v, deg) {\n  var h = rgb2hsl(v);\n  h[0] = hue(h[0] + deg);\n  h = hsl2rgb(h);\n  v.r = h[0];\n  v.g = h[1];\n  v.b = h[2];\n}\nfunction hslString(v) {\n  if (!v) {\n    return;\n  }\n  const a = rgb2hsl(v);\n  const h = a[0];\n  const s = n2p(a[1]);\n  const l = n2p(a[2]);\n  return v.a < 255\n    ? `hsla(${h}, ${s}%, ${l}%, ${b2n(v.a)})`\n    : `hsl(${h}, ${s}%, ${l}%)`;\n}\n\nconst map = {\n  x: 'dark',\n  Z: 'light',\n  Y: 're',\n  X: 'blu',\n  W: 'gr',\n  V: 'medium',\n  U: 'slate',\n  A: 'ee',\n  T: 'ol',\n  S: 'or',\n  B: 'ra',\n  C: 'lateg',\n  D: 'ights',\n  R: 'in',\n  Q: 'turquois',\n  E: 'hi',\n  P: 'ro',\n  O: 'al',\n  N: 'le',\n  M: 'de',\n  L: 'yello',\n  F: 'en',\n  K: 'ch',\n  G: 'arks',\n  H: 'ea',\n  I: 'ightg',\n  J: 'wh'\n};\nconst names$1 = {\n  OiceXe: 'f0f8ff',\n  antiquewEte: 'faebd7',\n  aqua: 'ffff',\n  aquamarRe: '7fffd4',\n  azuY: 'f0ffff',\n  beige: 'f5f5dc',\n  bisque: 'ffe4c4',\n  black: '0',\n  blanKedOmond: 'ffebcd',\n  Xe: 'ff',\n  XeviTet: '8a2be2',\n  bPwn: 'a52a2a',\n  burlywood: 'deb887',\n  caMtXe: '5f9ea0',\n  KartYuse: '7fff00',\n  KocTate: 'd2691e',\n  cSO: 'ff7f50',\n  cSnflowerXe: '6495ed',\n  cSnsilk: 'fff8dc',\n  crimson: 'dc143c',\n  cyan: 'ffff',\n  xXe: '8b',\n  xcyan: '8b8b',\n  xgTMnPd: 'b8860b',\n  xWay: 'a9a9a9',\n  xgYF: '6400',\n  xgYy: 'a9a9a9',\n  xkhaki: 'bdb76b',\n  xmagFta: '8b008b',\n  xTivegYF: '556b2f',\n  xSange: 'ff8c00',\n  xScEd: '9932cc',\n  xYd: '8b0000',\n  xsOmon: 'e9967a',\n  xsHgYF: '8fbc8f',\n  xUXe: '483d8b',\n  xUWay: '2f4f4f',\n  xUgYy: '2f4f4f',\n  xQe: 'ced1',\n  xviTet: '9400d3',\n  dAppRk: 'ff1493',\n  dApskyXe: 'bfff',\n  dimWay: '696969',\n  dimgYy: '696969',\n  dodgerXe: '1e90ff',\n  fiYbrick: 'b22222',\n  flSOwEte: 'fffaf0',\n  foYstWAn: '228b22',\n  fuKsia: 'ff00ff',\n  gaRsbSo: 'dcdcdc',\n  ghostwEte: 'f8f8ff',\n  gTd: 'ffd700',\n  gTMnPd: 'daa520',\n  Way: '808080',\n  gYF: '8000',\n  gYFLw: 'adff2f',\n  gYy: '808080',\n  honeyMw: 'f0fff0',\n  hotpRk: 'ff69b4',\n  RdianYd: 'cd5c5c',\n  Rdigo: '4b0082',\n  ivSy: 'fffff0',\n  khaki: 'f0e68c',\n  lavFMr: 'e6e6fa',\n  lavFMrXsh: 'fff0f5',\n  lawngYF: '7cfc00',\n  NmoncEffon: 'fffacd',\n  ZXe: 'add8e6',\n  ZcSO: 'f08080',\n  Zcyan: 'e0ffff',\n  ZgTMnPdLw: 'fafad2',\n  ZWay: 'd3d3d3',\n  ZgYF: '90ee90',\n  ZgYy: 'd3d3d3',\n  ZpRk: 'ffb6c1',\n  ZsOmon: 'ffa07a',\n  ZsHgYF: '20b2aa',\n  ZskyXe: '87cefa',\n  ZUWay: '778899',\n  ZUgYy: '778899',\n  ZstAlXe: 'b0c4de',\n  ZLw: 'ffffe0',\n  lime: 'ff00',\n  limegYF: '32cd32',\n  lRF: 'faf0e6',\n  magFta: 'ff00ff',\n  maPon: '800000',\n  VaquamarRe: '66cdaa',\n  VXe: 'cd',\n  VScEd: 'ba55d3',\n  VpurpN: '9370db',\n  VsHgYF: '3cb371',\n  VUXe: '7b68ee',\n  VsprRggYF: 'fa9a',\n  VQe: '48d1cc',\n  VviTetYd: 'c71585',\n  midnightXe: '191970',\n  mRtcYam: 'f5fffa',\n  mistyPse: 'ffe4e1',\n  moccasR: 'ffe4b5',\n  navajowEte: 'ffdead',\n  navy: '80',\n  Tdlace: 'fdf5e6',\n  Tive: '808000',\n  TivedBb: '6b8e23',\n  Sange: 'ffa500',\n  SangeYd: 'ff4500',\n  ScEd: 'da70d6',\n  pOegTMnPd: 'eee8aa',\n  pOegYF: '98fb98',\n  pOeQe: 'afeeee',\n  pOeviTetYd: 'db7093',\n  papayawEp: 'ffefd5',\n  pHKpuff: 'ffdab9',\n  peru: 'cd853f',\n  pRk: 'ffc0cb',\n  plum: 'dda0dd',\n  powMrXe: 'b0e0e6',\n  purpN: '800080',\n  YbeccapurpN: '663399',\n  Yd: 'ff0000',\n  Psybrown: 'bc8f8f',\n  PyOXe: '4169e1',\n  saddNbPwn: '8b4513',\n  sOmon: 'fa8072',\n  sandybPwn: 'f4a460',\n  sHgYF: '2e8b57',\n  sHshell: 'fff5ee',\n  siFna: 'a0522d',\n  silver: 'c0c0c0',\n  skyXe: '87ceeb',\n  UXe: '6a5acd',\n  UWay: '708090',\n  UgYy: '708090',\n  snow: 'fffafa',\n  sprRggYF: 'ff7f',\n  stAlXe: '4682b4',\n  tan: 'd2b48c',\n  teO: '8080',\n  tEstN: 'd8bfd8',\n  tomato: 'ff6347',\n  Qe: '40e0d0',\n  viTet: 'ee82ee',\n  JHt: 'f5deb3',\n  wEte: 'ffffff',\n  wEtesmoke: 'f5f5f5',\n  Lw: 'ffff00',\n  LwgYF: '9acd32'\n};\nfunction unpack() {\n  const unpacked = {};\n  const keys = Object.keys(names$1);\n  const tkeys = Object.keys(map);\n  let i, j, k, ok, nk;\n  for (i = 0; i < keys.length; i++) {\n    ok = nk = keys[i];\n    for (j = 0; j < tkeys.length; j++) {\n      k = tkeys[j];\n      nk = nk.replace(k, map[k]);\n    }\n    k = parseInt(names$1[ok], 16);\n    unpacked[nk] = [k >> 16 & 0xFF, k >> 8 & 0xFF, k & 0xFF];\n  }\n  return unpacked;\n}\n\nlet names;\nfunction nameParse(str) {\n  if (!names) {\n    names = unpack();\n    names.transparent = [0, 0, 0, 0];\n  }\n  const a = names[str.toLowerCase()];\n  return a && {\n    r: a[0],\n    g: a[1],\n    b: a[2],\n    a: a.length === 4 ? a[3] : 255\n  };\n}\n\nconst RGB_RE = /^rgba?\\(\\s*([-+.\\d]+)(%)?[\\s,]+([-+.e\\d]+)(%)?[\\s,]+([-+.e\\d]+)(%)?(?:[\\s,/]+([-+.e\\d]+)(%)?)?\\s*\\)$/;\nfunction rgbParse(str) {\n  const m = RGB_RE.exec(str);\n  let a = 255;\n  let r, g, b;\n  if (!m) {\n    return;\n  }\n  if (m[7] !== r) {\n    const v = +m[7];\n    a = m[8] ? p2b(v) : lim(v * 255, 0, 255);\n  }\n  r = +m[1];\n  g = +m[3];\n  b = +m[5];\n  r = 255 & (m[2] ? p2b(r) : lim(r, 0, 255));\n  g = 255 & (m[4] ? p2b(g) : lim(g, 0, 255));\n  b = 255 & (m[6] ? p2b(b) : lim(b, 0, 255));\n  return {\n    r: r,\n    g: g,\n    b: b,\n    a: a\n  };\n}\nfunction rgbString(v) {\n  return v && (\n    v.a < 255\n      ? `rgba(${v.r}, ${v.g}, ${v.b}, ${b2n(v.a)})`\n      : `rgb(${v.r}, ${v.g}, ${v.b})`\n  );\n}\n\nconst to = v => v <= 0.0031308 ? v * 12.92 : Math.pow(v, 1.0 / 2.4) * 1.055 - 0.055;\nconst from = v => v <= 0.04045 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);\nfunction interpolate(rgb1, rgb2, t) {\n  const r = from(b2n(rgb1.r));\n  const g = from(b2n(rgb1.g));\n  const b = from(b2n(rgb1.b));\n  return {\n    r: n2b(to(r + t * (from(b2n(rgb2.r)) - r))),\n    g: n2b(to(g + t * (from(b2n(rgb2.g)) - g))),\n    b: n2b(to(b + t * (from(b2n(rgb2.b)) - b))),\n    a: rgb1.a + t * (rgb2.a - rgb1.a)\n  };\n}\n\nfunction modHSL(v, i, ratio) {\n  if (v) {\n    let tmp = rgb2hsl(v);\n    tmp[i] = Math.max(0, Math.min(tmp[i] + tmp[i] * ratio, i === 0 ? 360 : 1));\n    tmp = hsl2rgb(tmp);\n    v.r = tmp[0];\n    v.g = tmp[1];\n    v.b = tmp[2];\n  }\n}\nfunction clone(v, proto) {\n  return v ? Object.assign(proto || {}, v) : v;\n}\nfunction fromObject(input) {\n  var v = {r: 0, g: 0, b: 0, a: 255};\n  if (Array.isArray(input)) {\n    if (input.length >= 3) {\n      v = {r: input[0], g: input[1], b: input[2], a: 255};\n      if (input.length > 3) {\n        v.a = n2b(input[3]);\n      }\n    }\n  } else {\n    v = clone(input, {r: 0, g: 0, b: 0, a: 1});\n    v.a = n2b(v.a);\n  }\n  return v;\n}\nfunction functionParse(str) {\n  if (str.charAt(0) === 'r') {\n    return rgbParse(str);\n  }\n  return hueParse(str);\n}\nclass Color {\n  constructor(input) {\n    if (input instanceof Color) {\n      return input;\n    }\n    const type = typeof input;\n    let v;\n    if (type === 'object') {\n      v = fromObject(input);\n    } else if (type === 'string') {\n      v = hexParse(input) || nameParse(input) || functionParse(input);\n    }\n    this._rgb = v;\n    this._valid = !!v;\n  }\n  get valid() {\n    return this._valid;\n  }\n  get rgb() {\n    var v = clone(this._rgb);\n    if (v) {\n      v.a = b2n(v.a);\n    }\n    return v;\n  }\n  set rgb(obj) {\n    this._rgb = fromObject(obj);\n  }\n  rgbString() {\n    return this._valid ? rgbString(this._rgb) : undefined;\n  }\n  hexString() {\n    return this._valid ? hexString(this._rgb) : undefined;\n  }\n  hslString() {\n    return this._valid ? hslString(this._rgb) : undefined;\n  }\n  mix(color, weight) {\n    if (color) {\n      const c1 = this.rgb;\n      const c2 = color.rgb;\n      let w2;\n      const p = weight === w2 ? 0.5 : weight;\n      const w = 2 * p - 1;\n      const a = c1.a - c2.a;\n      const w1 = ((w * a === -1 ? w : (w + a) / (1 + w * a)) + 1) / 2.0;\n      w2 = 1 - w1;\n      c1.r = 0xFF & w1 * c1.r + w2 * c2.r + 0.5;\n      c1.g = 0xFF & w1 * c1.g + w2 * c2.g + 0.5;\n      c1.b = 0xFF & w1 * c1.b + w2 * c2.b + 0.5;\n      c1.a = p * c1.a + (1 - p) * c2.a;\n      this.rgb = c1;\n    }\n    return this;\n  }\n  interpolate(color, t) {\n    if (color) {\n      this._rgb = interpolate(this._rgb, color._rgb, t);\n    }\n    return this;\n  }\n  clone() {\n    return new Color(this.rgb);\n  }\n  alpha(a) {\n    this._rgb.a = n2b(a);\n    return this;\n  }\n  clearer(ratio) {\n    const rgb = this._rgb;\n    rgb.a *= 1 - ratio;\n    return this;\n  }\n  greyscale() {\n    const rgb = this._rgb;\n    const val = round(rgb.r * 0.3 + rgb.g * 0.59 + rgb.b * 0.11);\n    rgb.r = rgb.g = rgb.b = val;\n    return this;\n  }\n  opaquer(ratio) {\n    const rgb = this._rgb;\n    rgb.a *= 1 + ratio;\n    return this;\n  }\n  negate() {\n    const v = this._rgb;\n    v.r = 255 - v.r;\n    v.g = 255 - v.g;\n    v.b = 255 - v.b;\n    return this;\n  }\n  lighten(ratio) {\n    modHSL(this._rgb, 2, ratio);\n    return this;\n  }\n  darken(ratio) {\n    modHSL(this._rgb, 2, -ratio);\n    return this;\n  }\n  saturate(ratio) {\n    modHSL(this._rgb, 1, ratio);\n    return this;\n  }\n  desaturate(ratio) {\n    modHSL(this._rgb, 1, -ratio);\n    return this;\n  }\n  rotate(deg) {\n    rotate(this._rgb, deg);\n    return this;\n  }\n}\n\nfunction index_esm(input) {\n  return new Color(input);\n}\n\nexport { Color, b2n, b2p, index_esm as default, hexParse, hexString, hsl2rgb, hslString, hsv2rgb, hueParse, hwb2rgb, lim, n2b, n2p, nameParse, p2b, rgb2hsl, rgbParse, rgbString, rotate, round };\n","import colorLib, {Color} from '@kurkle/color';\n\nexport function isPatternOrGradient(value: unknown): value is CanvasPattern | CanvasGradient {\n  if (value && typeof value === 'object') {\n    const type = value.toString();\n    return type === '[object CanvasPattern]' || type === '[object CanvasGradient]';\n  }\n\n  return false;\n}\n\nexport function color(value: CanvasGradient): CanvasGradient;\nexport function color(value: CanvasPattern): CanvasPattern;\nexport function color(\n  value:\n  | string\n  | { r: number; g: number; b: number; a: number }\n  | [number, number, number]\n  | [number, number, number, number]\n): Color;\nexport function color(value) {\n  return isPatternOrGradient(value) ? value : colorLib(value);\n}\n\nexport function getHoverColor(value: CanvasGradient): CanvasGradient;\nexport function getHoverColor(value: CanvasPattern): CanvasPattern;\nexport function getHoverColor(value: string): string;\nexport function getHoverColor(value) {\n  return isPatternOrGradient(value)\n    ? value\n    : colorLib(value).saturate(0.5).darken(0.1).hexString();\n}\n","const numbers = ['x', 'y', 'borderWidth', 'radius', 'tension'];\nconst colors = ['color', 'borderColor', 'backgroundColor'];\n\nexport function applyAnimationsDefaults(defaults) {\n  defaults.set('animation', {\n    delay: undefined,\n    duration: 1000,\n    easing: 'easeOutQuart',\n    fn: undefined,\n    from: undefined,\n    loop: undefined,\n    to: undefined,\n    type: undefined,\n  });\n\n  defaults.describe('animation', {\n    _fallback: false,\n    _indexable: false,\n    _scriptable: (name) => name !== 'onProgress' && name !== 'onComplete' && name !== 'fn',\n  });\n\n  defaults.set('animations', {\n    colors: {\n      type: 'color',\n      properties: colors\n    },\n    numbers: {\n      type: 'number',\n      properties: numbers\n    },\n  });\n\n  defaults.describe('animations', {\n    _fallback: 'animation',\n  });\n\n  defaults.set('transitions', {\n    active: {\n      animation: {\n        duration: 400\n      }\n    },\n    resize: {\n      animation: {\n        duration: 0\n      }\n    },\n    show: {\n      animations: {\n        colors: {\n          from: 'transparent'\n        },\n        visible: {\n          type: 'boolean',\n          duration: 0 // show immediately\n        },\n      }\n    },\n    hide: {\n      animations: {\n        colors: {\n          to: 'transparent'\n        },\n        visible: {\n          type: 'boolean',\n          easing: 'linear',\n          fn: v => v | 0 // for keeping the dataset visible all the way through the animation\n        },\n      }\n    }\n  });\n}\n","\nconst intlCache = new Map<string, Intl.NumberFormat>();\n\nfunction getNumberFormat(locale: string, options?: Intl.NumberFormatOptions) {\n  options = options || {};\n  const cacheKey = locale + JSON.stringify(options);\n  let formatter = intlCache.get(cacheKey);\n  if (!formatter) {\n    formatter = new Intl.NumberFormat(locale, options);\n    intlCache.set(cacheKey, formatter);\n  }\n  return formatter;\n}\n\nexport function formatNumber(num: number, locale: string, options?: Intl.NumberFormatOptions) {\n  return getNumberFormat(locale, options).format(num);\n}\n","import {isArray} from '../helpers/helpers.core';\nimport {formatNumber} from '../helpers/helpers.intl';\nimport {log10} from '../helpers/helpers.math';\n\n/**\n * Namespace to hold formatters for different types of ticks\n * @namespace Chart.Ticks.formatters\n */\nconst formatters = {\n  /**\n   * Formatter for value labels\n   * @method Chart.Ticks.formatters.values\n   * @param value the value to display\n   * @return {string|string[]} the label to display\n   */\n  values(value) {\n    return isArray(value) ? /** @type {string[]} */ (value) : '' + value;\n  },\n\n  /**\n   * Formatter for numeric ticks\n   * @method Chart.Ticks.formatters.numeric\n   * @param tickValue {number} the value to be formatted\n   * @param index {number} the position of the tickValue parameter in the ticks array\n   * @param ticks {object[]} the list of ticks being converted\n   * @return {string} string representation of the tickValue parameter\n   */\n  numeric(tickValue, index, ticks) {\n    if (tickValue === 0) {\n      return '0'; // never show decimal places for 0\n    }\n\n    const locale = this.chart.options.locale;\n    let notation;\n    let delta = tickValue; // This is used when there are less than 2 ticks as the tick interval.\n\n    if (ticks.length > 1) {\n      // all ticks are small or there huge numbers; use scientific notation\n      const maxTick = Math.max(Math.abs(ticks[0].value), Math.abs(ticks[ticks.length - 1].value));\n      if (maxTick < 1e-4 || maxTick > 1e+15) {\n        notation = 'scientific';\n      }\n\n      delta = calculateDelta(tickValue, ticks);\n    }\n\n    const logDelta = log10(Math.abs(delta));\n    const numDecimal = Math.max(Math.min(-1 * Math.floor(logDelta), 20), 0); // toFixed has a max of 20 decimal places\n\n    const options = {notation, minimumFractionDigits: numDecimal, maximumFractionDigits: numDecimal};\n    Object.assign(options, this.options.ticks.format);\n\n    return formatNumber(tickValue, locale, options);\n  },\n\n\n  /**\n   * Formatter for logarithmic ticks\n   * @method Chart.Ticks.formatters.logarithmic\n   * @param tickValue {number} the value to be formatted\n   * @param index {number} the position of the tickValue parameter in the ticks array\n   * @param ticks {object[]} the list of ticks being converted\n   * @return {string} string representation of the tickValue parameter\n   */\n  logarithmic(tickValue, index, ticks) {\n    if (tickValue === 0) {\n      return '0';\n    }\n    const remain = ticks[index].significand || (tickValue / (Math.pow(10, Math.floor(log10(tickValue)))));\n    if ([1, 2, 3, 5, 10, 15].includes(remain) || index > 0.8 * ticks.length) {\n      return formatters.numeric.call(this, tickValue, index, ticks);\n    }\n    return '';\n  }\n\n};\n\n\nfunction calculateDelta(tickValue, ticks) {\n  // Figure out how many digits to show\n  // The space between the first two ticks might be smaller than normal spacing\n  let delta = ticks.length > 3 ? ticks[2].value - ticks[1].value : ticks[1].value - ticks[0].value;\n\n  // If we have a number like 2.5 as the delta, figure out how many decimal places we need\n  if (Math.abs(delta) >= 1 && tickValue !== Math.floor(tickValue)) {\n    // not an integer\n    delta = tickValue - Math.floor(tickValue);\n  }\n  return delta;\n}\n\n/**\n * Namespace to hold static tick generation functions\n * @namespace Chart.Ticks\n */\nexport default {formatters};\n","import {getHoverColor} from '../helpers/helpers.color';\nimport {isObject, merge, valueOrDefault} from '../helpers/helpers.core';\nimport {applyAnimationsDefaults} from './core.animations.defaults';\nimport {applyLayoutsDefaults} from './core.layouts.defaults';\nimport {applyScaleDefaults} from './core.scale.defaults';\n\nexport const overrides = Object.create(null);\nexport const descriptors = Object.create(null);\n\n/**\n * @param {object} node\n * @param {string} key\n * @return {object}\n */\nfunction getScope(node, key) {\n  if (!key) {\n    return node;\n  }\n  const keys = key.split('.');\n  for (let i = 0, n = keys.length; i < n; ++i) {\n    const k = keys[i];\n    node = node[k] || (node[k] = Object.create(null));\n  }\n  return node;\n}\n\nfunction set(root, scope, values) {\n  if (typeof scope === 'string') {\n    return merge(getScope(root, scope), values);\n  }\n  return merge(getScope(root, ''), scope);\n}\n\n/**\n * Please use the module's default export which provides a singleton instance\n * Note: class is exported for typedoc\n */\nexport class Defaults {\n  constructor(_descriptors, _appliers) {\n    this.animation = undefined;\n    this.backgroundColor = 'rgba(0,0,0,0.1)';\n    this.borderColor = 'rgba(0,0,0,0.1)';\n    this.color = '#666';\n    this.datasets = {};\n    this.devicePixelRatio = (context) => context.chart.platform.getDevicePixelRatio();\n    this.elements = {};\n    this.events = [\n      'mousemove',\n      'mouseout',\n      'click',\n      'touchstart',\n      'touchmove'\n    ];\n    this.font = {\n      family: \"'Helvetica Neue', 'Helvetica', 'Arial', sans-serif\",\n      size: 12,\n      style: 'normal',\n      lineHeight: 1.2,\n      weight: null\n    };\n    this.hover = {};\n    this.hoverBackgroundColor = (ctx, options) => getHoverColor(options.backgroundColor);\n    this.hoverBorderColor = (ctx, options) => getHoverColor(options.borderColor);\n    this.hoverColor = (ctx, options) => getHoverColor(options.color);\n    this.indexAxis = 'x';\n    this.interaction = {\n      mode: 'nearest',\n      intersect: true,\n      includeInvisible: false\n    };\n    this.maintainAspectRatio = true;\n    this.onHover = null;\n    this.onClick = null;\n    this.parsing = true;\n    this.plugins = {};\n    this.responsive = true;\n    this.scale = undefined;\n    this.scales = {};\n    this.showLine = true;\n    this.drawActiveElementsOnTop = true;\n\n    this.describe(_descriptors);\n    this.apply(_appliers);\n  }\n\n  /**\n\t * @param {string|object} scope\n\t * @param {object} [values]\n\t */\n  set(scope, values) {\n    return set(this, scope, values);\n  }\n\n  /**\n\t * @param {string} scope\n\t */\n  get(scope) {\n    return getScope(this, scope);\n  }\n\n  /**\n\t * @param {string|object} scope\n\t * @param {object} [values]\n\t */\n  describe(scope, values) {\n    return set(descriptors, scope, values);\n  }\n\n  override(scope, values) {\n    return set(overrides, scope, values);\n  }\n\n  /**\n\t * Routes the named defaults to fallback to another scope/name.\n\t * This routing is useful when those target values, like defaults.color, are changed runtime.\n\t * If the values would be copied, the runtime change would not take effect. By routing, the\n\t * fallback is evaluated at each access, so its always up to date.\n\t *\n\t * Example:\n\t *\n\t * \tdefaults.route('elements.arc', 'backgroundColor', '', 'color')\n\t *   - reads the backgroundColor from defaults.color when undefined locally\n\t *\n\t * @param {string} scope Scope this route applies to.\n\t * @param {string} name Property name that should be routed to different namespace when not defined here.\n\t * @param {string} targetScope The namespace where those properties should be routed to.\n\t * Empty string ('') is the root of defaults.\n\t * @param {string} targetName The target name in the target scope the property should be routed to.\n\t */\n  route(scope, name, targetScope, targetName) {\n    const scopeObject = getScope(this, scope);\n    const targetScopeObject = getScope(this, targetScope);\n    const privateName = '_' + name;\n\n    Object.defineProperties(scopeObject, {\n      // A private property is defined to hold the actual value, when this property is set in its scope (set in the setter)\n      [privateName]: {\n        value: scopeObject[name],\n        writable: true\n      },\n      // The actual property is defined as getter/setter so we can do the routing when value is not locally set.\n      [name]: {\n        enumerable: true,\n        get() {\n          const local = this[privateName];\n          const target = targetScopeObject[targetName];\n          if (isObject(local)) {\n            return Object.assign({}, target, local);\n          }\n          return valueOrDefault(local, target);\n        },\n        set(value) {\n          this[privateName] = value;\n        }\n      }\n    });\n  }\n\n  apply(appliers) {\n    appliers.forEach((apply) => apply(this));\n  }\n}\n\n// singleton instance\nexport default /* #__PURE__ */ new Defaults({\n  _scriptable: (name) => !name.startsWith('on'),\n  _indexable: (name) => name !== 'events',\n  hover: {\n    _fallback: 'interaction'\n  },\n  interaction: {\n    _scriptable: false,\n    _indexable: false,\n  }\n}, [applyAnimationsDefaults, applyLayoutsDefaults, applyScaleDefaults]);\n","export function applyLayoutsDefaults(defaults) {\n  defaults.set('layout', {\n    autoPadding: true,\n    padding: {\n      top: 0,\n      right: 0,\n      bottom: 0,\n      left: 0\n    }\n  });\n}\n","import Ticks from './core.ticks';\n\nexport function applyScaleDefaults(defaults) {\n  defaults.set('scale', {\n    display: true,\n    offset: false,\n    reverse: false,\n    beginAtZero: false,\n\n    /**\n     * Scale boundary strategy (bypassed by min/max time options)\n     * - `data`: make sure data are fully visible, ticks outside are removed\n     * - `ticks`: make sure ticks are fully visible, data outside are truncated\n     * @see https://github.com/chartjs/Chart.js/pull/4556\n     * @since 3.0.0\n     */\n    bounds: 'ticks',\n\n    /**\n     * Addition grace added to max and reduced from min data value.\n     * @since 3.0.0\n     */\n    grace: 0,\n\n    // grid line settings\n    grid: {\n      display: true,\n      lineWidth: 1,\n      drawOnChartArea: true,\n      drawTicks: true,\n      tickLength: 8,\n      tickWidth: (_ctx, options) => options.lineWidth,\n      tickColor: (_ctx, options) => options.color,\n      offset: false,\n    },\n\n    border: {\n      display: true,\n      dash: [],\n      dashOffset: 0.0,\n      width: 1\n    },\n\n    // scale title\n    title: {\n      // display property\n      display: false,\n\n      // actual label\n      text: '',\n\n      // top/bottom padding\n      padding: {\n        top: 4,\n        bottom: 4\n      }\n    },\n\n    // label settings\n    ticks: {\n      minRotation: 0,\n      maxRotation: 50,\n      mirror: false,\n      textStrokeWidth: 0,\n      textStrokeColor: '',\n      padding: 3,\n      display: true,\n      autoSkip: true,\n      autoSkipPadding: 3,\n      labelOffset: 0,\n      // We pass through arrays to be rendered as multiline labels, we convert Others to strings here.\n      callback: Ticks.formatters.values,\n      minor: {},\n      major: {},\n      align: 'center',\n      crossAlign: 'near',\n\n      showLabelBackdrop: false,\n      backdropColor: 'rgba(255, 255, 255, 0.75)',\n      backdropPadding: 2,\n    }\n  });\n\n  defaults.route('scale.ticks', 'color', '', 'color');\n  defaults.route('scale.grid', 'color', '', 'borderColor');\n  defaults.route('scale.border', 'color', '', 'borderColor');\n  defaults.route('scale.title', 'color', '', 'color');\n\n  defaults.describe('scale', {\n    _fallback: false,\n    _scriptable: (name) => !name.startsWith('before') && !name.startsWith('after') && name !== 'callback' && name !== 'parser',\n    _indexable: (name) => name !== 'borderDash' && name !== 'tickBorderDash' && name !== 'dash',\n  });\n\n  defaults.describe('scales', {\n    _fallback: 'scale',\n  });\n\n  defaults.describe('scale.ticks', {\n    _scriptable: (name) => name !== 'backdropPadding' && name !== 'callback',\n    _indexable: (name) => name !== 'backdropPadding',\n  });\n}\n","import {ChartArea, Scale} from '../../types';\nimport Chart from '../core/core.controller';\nimport {ChartEvent} from '../types';\nimport {INFINITY} from './helpers.math';\n\n/**\n * Note: typedefs are auto-exported, so use a made-up `dom` namespace where\n * necessary to avoid duplicates with `export * from './helpers`; see\n * https://github.com/microsoft/TypeScript/issues/46011\n * @typedef { import(\"../core/core.controller\").default } dom.Chart\n * @typedef { import('../../types').ChartEvent } ChartEvent\n */\n\n/**\n * @private\n */\nexport function _isDomSupported(): boolean {\n  return typeof window !== 'undefined' && typeof document !== 'undefined';\n}\n\n/**\n * @private\n */\nexport function _getParentNode(domNode: HTMLCanvasElement): HTMLCanvasElement {\n  let parent = domNode.parentNode;\n  if (parent && parent.toString() === '[object ShadowRoot]') {\n    parent = (parent as ShadowRoot).host;\n  }\n  return parent as HTMLCanvasElement;\n}\n\n/**\n * convert max-width/max-height values that may be percentages into a number\n * @private\n */\n\nfunction parseMaxStyle(styleValue: string | number, node: HTMLElement, parentProperty: string) {\n  let valueInPixels: number;\n  if (typeof styleValue === 'string') {\n    valueInPixels = parseInt(styleValue, 10);\n\n    if (styleValue.indexOf('%') !== -1) {\n      // percentage * size in dimension\n      valueInPixels = (valueInPixels / 100) * node.parentNode[parentProperty];\n    }\n  } else {\n    valueInPixels = styleValue;\n  }\n\n  return valueInPixels;\n}\n\nconst getComputedStyle = (element: HTMLElement): CSSStyleDeclaration =>\n  element.ownerDocument.defaultView.getComputedStyle(element, null);\n\nexport function getStyle(el: HTMLElement, property: string): string {\n  return getComputedStyle(el).getPropertyValue(property);\n}\n\nconst positions = ['top', 'right', 'bottom', 'left'];\nfunction getPositionedStyle(styles: CSSStyleDeclaration, style: string, suffix?: string): ChartArea {\n  const result = {} as ChartArea;\n  suffix = suffix ? '-' + suffix : '';\n  for (let i = 0; i < 4; i++) {\n    const pos = positions[i];\n    result[pos] = parseFloat(styles[style + '-' + pos + suffix]) || 0;\n  }\n  result.width = result.left + result.right;\n  result.height = result.top + result.bottom;\n  return result;\n}\n\nconst useOffsetPos = (x: number, y: number, target: HTMLElement | EventTarget) =>\n  (x > 0 || y > 0) && (!target || !(target as HTMLElement).shadowRoot);\n\n/**\n * @param e\n * @param canvas\n * @returns Canvas position\n */\nfunction getCanvasPosition(\n  e: Event | TouchEvent | MouseEvent,\n  canvas: HTMLCanvasElement\n): {\n    x: number;\n    y: number;\n    box: boolean;\n  } {\n  const touches = (e as TouchEvent).touches;\n  const source = (touches && touches.length ? touches[0] : e) as MouseEvent;\n  const {offsetX, offsetY} = source as MouseEvent;\n  let box = false;\n  let x, y;\n  if (useOffsetPos(offsetX, offsetY, e.target)) {\n    x = offsetX;\n    y = offsetY;\n  } else {\n    const rect = canvas.getBoundingClientRect();\n    x = source.clientX - rect.left;\n    y = source.clientY - rect.top;\n    box = true;\n  }\n  return {x, y, box};\n}\n\n/**\n * Gets an event's x, y coordinates, relative to the chart area\n * @param event\n * @param chart\n * @returns x and y coordinates of the event\n */\n\nexport function getRelativePosition(\n  event: Event | ChartEvent | TouchEvent | MouseEvent,\n  chart: Chart\n): { x: number; y: number } {\n  if ('native' in event) {\n    return event;\n  }\n\n  const {canvas, currentDevicePixelRatio} = chart;\n  const style = getComputedStyle(canvas);\n  const borderBox = style.boxSizing === 'border-box';\n  const paddings = getPositionedStyle(style, 'padding');\n  const borders = getPositionedStyle(style, 'border', 'width');\n  const {x, y, box} = getCanvasPosition(event, canvas);\n  const xOffset = paddings.left + (box && borders.left);\n  const yOffset = paddings.top + (box && borders.top);\n\n  let {width, height} = chart;\n  if (borderBox) {\n    width -= paddings.width + borders.width;\n    height -= paddings.height + borders.height;\n  }\n  return {\n    x: Math.round((x - xOffset) / width * canvas.width / currentDevicePixelRatio),\n    y: Math.round((y - yOffset) / height * canvas.height / currentDevicePixelRatio)\n  };\n}\n\nfunction getContainerSize(canvas: HTMLCanvasElement, width: number, height: number): Partial<Scale> {\n  let maxWidth: number, maxHeight: number;\n\n  if (width === undefined || height === undefined) {\n    const container = _getParentNode(canvas);\n    if (!container) {\n      width = canvas.clientWidth;\n      height = canvas.clientHeight;\n    } else {\n      const rect = container.getBoundingClientRect(); // this is the border box of the container\n      const containerStyle = getComputedStyle(container);\n      const containerBorder = getPositionedStyle(containerStyle, 'border', 'width');\n      const containerPadding = getPositionedStyle(containerStyle, 'padding');\n      width = rect.width - containerPadding.width - containerBorder.width;\n      height = rect.height - containerPadding.height - containerBorder.height;\n      maxWidth = parseMaxStyle(containerStyle.maxWidth, container, 'clientWidth');\n      maxHeight = parseMaxStyle(containerStyle.maxHeight, container, 'clientHeight');\n    }\n  }\n  return {\n    width,\n    height,\n    maxWidth: maxWidth || INFINITY,\n    maxHeight: maxHeight || INFINITY\n  };\n}\n\nconst round1 = (v: number) => Math.round(v * 10) / 10;\n\n// eslint-disable-next-line complexity\nexport function getMaximumSize(\n  canvas: HTMLCanvasElement,\n  bbWidth?: number,\n  bbHeight?: number,\n  aspectRatio?: number\n): { width: number; height: number } {\n  const style = getComputedStyle(canvas);\n  const margins = getPositionedStyle(style, 'margin');\n  const maxWidth = parseMaxStyle(style.maxWidth, canvas, 'clientWidth') || INFINITY;\n  const maxHeight = parseMaxStyle(style.maxHeight, canvas, 'clientHeight') || INFINITY;\n  const containerSize = getContainerSize(canvas, bbWidth, bbHeight);\n  let {width, height} = containerSize;\n\n  if (style.boxSizing === 'content-box') {\n    const borders = getPositionedStyle(style, 'border', 'width');\n    const paddings = getPositionedStyle(style, 'padding');\n    width -= paddings.width + borders.width;\n    height -= paddings.height + borders.height;\n  }\n  width = Math.max(0, width - margins.width);\n  height = Math.max(0, aspectRatio ? Math.floor(width / aspectRatio) : height - margins.height);\n  width = round1(Math.min(width, maxWidth, containerSize.maxWidth));\n  height = round1(Math.min(height, maxHeight, containerSize.maxHeight));\n  if (width && !height) {\n    // https://github.com/chartjs/Chart.js/issues/4659\n    // If the canvas has width, but no height, default to aspectRatio of 2 (canvas default)\n    height = round1(width / 2);\n  }\n\n  const maintainHeight = bbWidth !== undefined || bbHeight !== undefined;\n\n  if (maintainHeight && aspectRatio && containerSize.height && height > containerSize.height) {\n    height = containerSize.height;\n    width = round1(Math.floor(height * aspectRatio));\n  }\n\n  return {width, height};\n}\n\n/**\n * @param chart\n * @param forceRatio\n * @param forceStyle\n * @returns True if the canvas context size or transformation has changed.\n */\nexport function retinaScale(\n  chart: Chart,\n  forceRatio: number,\n  forceStyle?: boolean\n): boolean | void {\n  const pixelRatio = forceRatio || 1;\n  const deviceHeight = Math.floor(chart.height * pixelRatio);\n  const deviceWidth = Math.floor(chart.width * pixelRatio);\n\n  chart.height = deviceHeight / pixelRatio;\n  chart.width = deviceWidth / pixelRatio;\n\n  const canvas = chart.canvas;\n\n  // If no style has been set on the canvas, the render size is used as display size,\n  // making the chart visually bigger, so let's enforce it to the \"correct\" values.\n  // See https://github.com/chartjs/Chart.js/issues/3575\n  if (canvas.style && (forceStyle || (!canvas.style.height && !canvas.style.width))) {\n    canvas.style.height = `${chart.height}px`;\n    canvas.style.width = `${chart.width}px`;\n  }\n\n  if (chart.currentDevicePixelRatio !== pixelRatio\n      || canvas.height !== deviceHeight\n      || canvas.width !== deviceWidth) {\n    chart.currentDevicePixelRatio = pixelRatio;\n    canvas.height = deviceHeight;\n    canvas.width = deviceWidth;\n    chart.ctx.setTransform(pixelRatio, 0, 0, pixelRatio, 0, 0);\n    return true;\n  }\n  return false;\n}\n\n/**\n * Detects support for options object argument in addEventListener.\n * https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#Safely_detecting_option_support\n * @private\n */\nexport const supportsEventListenerOptions = (function() {\n  let passiveSupported = false;\n  try {\n    const options = {\n      get passive() { // This function will be called when the browser attempts to access the passive property.\n        passiveSupported = true;\n        return false;\n      }\n    } as EventListenerOptions;\n\n    window.addEventListener('test', null, options);\n    window.removeEventListener('test', null, options);\n  } catch (e) {\n    // continue regardless of error\n  }\n  return passiveSupported;\n}());\n\n/**\n * The \"used\" size is the final value of a dimension property after all calculations have\n * been performed. This method uses the computed style of `element` but returns undefined\n * if the computed style is not expressed in pixels. That can happen in some cases where\n * `element` has a size relative to its parent and this last one is not yet displayed,\n * for example because of `display: none` on a parent node.\n * @see https://developer.mozilla.org/en-US/docs/Web/CSS/used_value\n * @returns Size in pixels or undefined if unknown.\n */\n\nexport function readUsedSize(\n  element: HTMLElement,\n  property: 'width' | 'height'\n): number | undefined {\n  const value = getStyle(element, property);\n  const matches = value && value.match(/^(\\d+)(\\.\\d+)?px$/);\n  return matches ? +matches[1] : undefined;\n}\n","import {isArray, isNullOrUndef} from './helpers.core';\nimport {PI, TAU, HALF_PI, QUARTER_PI, TWO_THIRDS_PI, RAD_PER_DEG} from './helpers.math';\n\n/**\n * Note: typedefs are auto-exported, so use a made-up `canvas` namespace where\n * necessary to avoid duplicates with `export * from './helpers`; see\n * https://github.com/microsoft/TypeScript/issues/46011\n * @typedef { import(\"../core/core.controller\").default } canvas.Chart\n * @typedef { import(\"../../types\").Point } Point\n */\n\n/**\n * @namespace Chart.helpers.canvas\n */\n\n/**\n * Converts the given font object into a CSS font string.\n * @param {object} font - A font object.\n * @return {string|null} The CSS font string. See https://developer.mozilla.org/en-US/docs/Web/CSS/font\n * @private\n */\nexport function toFontString(font) {\n  if (!font || isNullOrUndef(font.size) || isNullOrUndef(font.family)) {\n    return null;\n  }\n\n  return (font.style ? font.style + ' ' : '')\n\t\t+ (font.weight ? font.weight + ' ' : '')\n\t\t+ font.size + 'px '\n\t\t+ font.family;\n}\n\n/**\n * @private\n */\nexport function _measureText(ctx, data, gc, longest, string) {\n  let textWidth = data[string];\n  if (!textWidth) {\n    textWidth = data[string] = ctx.measureText(string).width;\n    gc.push(string);\n  }\n  if (textWidth > longest) {\n    longest = textWidth;\n  }\n  return longest;\n}\n\n/**\n * @private\n */\nexport function _longestText(ctx, font, arrayOfThings, cache) {\n  cache = cache || {};\n  let data = cache.data = cache.data || {};\n  let gc = cache.garbageCollect = cache.garbageCollect || [];\n\n  if (cache.font !== font) {\n    data = cache.data = {};\n    gc = cache.garbageCollect = [];\n    cache.font = font;\n  }\n\n  ctx.save();\n\n  ctx.font = font;\n  let longest = 0;\n  const ilen = arrayOfThings.length;\n  let i, j, jlen, thing, nestedThing;\n  for (i = 0; i < ilen; i++) {\n    thing = arrayOfThings[i];\n\n    // Undefined strings and arrays should not be measured\n    if (thing !== undefined && thing !== null && isArray(thing) !== true) {\n      longest = _measureText(ctx, data, gc, longest, thing);\n    } else if (isArray(thing)) {\n      // if it is an array lets measure each element\n      // to do maybe simplify this function a bit so we can do this more recursively?\n      for (j = 0, jlen = thing.length; j < jlen; j++) {\n        nestedThing = thing[j];\n        // Undefined strings and arrays should not be measured\n        if (nestedThing !== undefined && nestedThing !== null && !isArray(nestedThing)) {\n          longest = _measureText(ctx, data, gc, longest, nestedThing);\n        }\n      }\n    }\n  }\n\n  ctx.restore();\n\n  const gcLen = gc.length / 2;\n  if (gcLen > arrayOfThings.length) {\n    for (i = 0; i < gcLen; i++) {\n      delete data[gc[i]];\n    }\n    gc.splice(0, gcLen);\n  }\n  return longest;\n}\n\n/**\n * Returns the aligned pixel value to avoid anti-aliasing blur\n * @param {canvas.Chart} chart - The chart instance.\n * @param {number} pixel - A pixel value.\n * @param {number} width - The width of the element.\n * @returns {number} The aligned pixel value.\n * @private\n */\nexport function _alignPixel(chart, pixel, width) {\n  const devicePixelRatio = chart.currentDevicePixelRatio;\n  const halfWidth = width !== 0 ? Math.max(width / 2, 0.5) : 0;\n  return Math.round((pixel - halfWidth) * devicePixelRatio) / devicePixelRatio + halfWidth;\n}\n\n/**\n * Clears the entire canvas.\n * @param {HTMLCanvasElement} canvas\n * @param {CanvasRenderingContext2D} [ctx]\n */\nexport function clearCanvas(canvas, ctx) {\n  ctx = ctx || canvas.getContext('2d');\n\n  ctx.save();\n  // canvas.width and canvas.height do not consider the canvas transform,\n  // while clearRect does\n  ctx.resetTransform();\n  ctx.clearRect(0, 0, canvas.width, canvas.height);\n  ctx.restore();\n}\n\nexport function drawPoint(ctx, options, x, y) {\n  drawPointLegend(ctx, options, x, y, null);\n}\n\nexport function drawPointLegend(ctx, options, x, y, w) {\n  let type, xOffset, yOffset, size, cornerRadius, width, xOffsetW, yOffsetW;\n  const style = options.pointStyle;\n  const rotation = options.rotation;\n  const radius = options.radius;\n  let rad = (rotation || 0) * RAD_PER_DEG;\n\n  if (style && typeof style === 'object') {\n    type = style.toString();\n    if (type === '[object HTMLImageElement]' || type === '[object HTMLCanvasElement]') {\n      ctx.save();\n      ctx.translate(x, y);\n      ctx.rotate(rad);\n      ctx.drawImage(style, -style.width / 2, -style.height / 2, style.width, style.height);\n      ctx.restore();\n      return;\n    }\n  }\n\n  if (isNaN(radius) || radius <= 0) {\n    return;\n  }\n\n  ctx.beginPath();\n\n  switch (style) {\n  // Default includes circle\n  default:\n    if (w) {\n      ctx.ellipse(x, y, w / 2, radius, 0, 0, TAU);\n    } else {\n      ctx.arc(x, y, radius, 0, TAU);\n    }\n    ctx.closePath();\n    break;\n  case 'triangle':\n    width = w ? w / 2 : radius;\n    ctx.moveTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);\n    rad += TWO_THIRDS_PI;\n    ctx.lineTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);\n    rad += TWO_THIRDS_PI;\n    ctx.lineTo(x + Math.sin(rad) * width, y - Math.cos(rad) * radius);\n    ctx.closePath();\n    break;\n  case 'rectRounded':\n    // NOTE: the rounded rect implementation changed to use `arc` instead of\n    // `quadraticCurveTo` since it generates better results when rect is\n    // almost a circle. 0.516 (instead of 0.5) produces results with visually\n    // closer proportion to the previous impl and it is inscribed in the\n    // circle with `radius`. For more details, see the following PRs:\n    // https://github.com/chartjs/Chart.js/issues/5597\n    // https://github.com/chartjs/Chart.js/issues/5858\n    cornerRadius = radius * 0.516;\n    size = radius - cornerRadius;\n    xOffset = Math.cos(rad + QUARTER_PI) * size;\n    xOffsetW = Math.cos(rad + QUARTER_PI) * (w ? w / 2 - cornerRadius : size);\n    yOffset = Math.sin(rad + QUARTER_PI) * size;\n    yOffsetW = Math.sin(rad + QUARTER_PI) * (w ? w / 2 - cornerRadius : size);\n    ctx.arc(x - xOffsetW, y - yOffset, cornerRadius, rad - PI, rad - HALF_PI);\n    ctx.arc(x + yOffsetW, y - xOffset, cornerRadius, rad - HALF_PI, rad);\n    ctx.arc(x + xOffsetW, y + yOffset, cornerRadius, rad, rad + HALF_PI);\n    ctx.arc(x - yOffsetW, y + xOffset, cornerRadius, rad + HALF_PI, rad + PI);\n    ctx.closePath();\n    break;\n  case 'rect':\n    if (!rotation) {\n      size = Math.SQRT1_2 * radius;\n      width = w ? w / 2 : size;\n      ctx.rect(x - width, y - size, 2 * width, 2 * size);\n      break;\n    }\n    rad += QUARTER_PI;\n    /* falls through */\n  case 'rectRot':\n    xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n    xOffset = Math.cos(rad) * radius;\n    yOffset = Math.sin(rad) * radius;\n    yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n    ctx.moveTo(x - xOffsetW, y - yOffset);\n    ctx.lineTo(x + yOffsetW, y - xOffset);\n    ctx.lineTo(x + xOffsetW, y + yOffset);\n    ctx.lineTo(x - yOffsetW, y + xOffset);\n    ctx.closePath();\n    break;\n  case 'crossRot':\n    rad += QUARTER_PI;\n    /* falls through */\n  case 'cross':\n    xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n    xOffset = Math.cos(rad) * radius;\n    yOffset = Math.sin(rad) * radius;\n    yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n    ctx.moveTo(x - xOffsetW, y - yOffset);\n    ctx.lineTo(x + xOffsetW, y + yOffset);\n    ctx.moveTo(x + yOffsetW, y - xOffset);\n    ctx.lineTo(x - yOffsetW, y + xOffset);\n    break;\n  case 'star':\n    xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n    xOffset = Math.cos(rad) * radius;\n    yOffset = Math.sin(rad) * radius;\n    yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n    ctx.moveTo(x - xOffsetW, y - yOffset);\n    ctx.lineTo(x + xOffsetW, y + yOffset);\n    ctx.moveTo(x + yOffsetW, y - xOffset);\n    ctx.lineTo(x - yOffsetW, y + xOffset);\n    rad += QUARTER_PI;\n    xOffsetW = Math.cos(rad) * (w ? w / 2 : radius);\n    xOffset = Math.cos(rad) * radius;\n    yOffset = Math.sin(rad) * radius;\n    yOffsetW = Math.sin(rad) * (w ? w / 2 : radius);\n    ctx.moveTo(x - xOffsetW, y - yOffset);\n    ctx.lineTo(x + xOffsetW, y + yOffset);\n    ctx.moveTo(x + yOffsetW, y - xOffset);\n    ctx.lineTo(x - yOffsetW, y + xOffset);\n    break;\n  case 'line':\n    xOffset = w ? w / 2 : Math.cos(rad) * radius;\n    yOffset = Math.sin(rad) * radius;\n    ctx.moveTo(x - xOffset, y - yOffset);\n    ctx.lineTo(x + xOffset, y + yOffset);\n    break;\n  case 'dash':\n    ctx.moveTo(x, y);\n    ctx.lineTo(x + Math.cos(rad) * (w ? w / 2 : radius), y + Math.sin(rad) * radius);\n    break;\n  }\n\n  ctx.fill();\n  if (options.borderWidth > 0) {\n    ctx.stroke();\n  }\n}\n\n/**\n * Returns true if the point is inside the rectangle\n * @param {Point} point - The point to test\n * @param {object} area - The rectangle\n * @param {number} [margin] - allowed margin\n * @returns {boolean}\n * @private\n */\nexport function _isPointInArea(point, area, margin) {\n  margin = margin || 0.5; // margin - default is to match rounded decimals\n\n  return !area || (point && point.x > area.left - margin && point.x < area.right + margin &&\n\t\tpoint.y > area.top - margin && point.y < area.bottom + margin);\n}\n\nexport function clipArea(ctx, area) {\n  ctx.save();\n  ctx.beginPath();\n  ctx.rect(area.left, area.top, area.right - area.left, area.bottom - area.top);\n  ctx.clip();\n}\n\nexport function unclipArea(ctx) {\n  ctx.restore();\n}\n\n/**\n * @private\n */\nexport function _steppedLineTo(ctx, previous, target, flip, mode) {\n  if (!previous) {\n    return ctx.lineTo(target.x, target.y);\n  }\n  if (mode === 'middle') {\n    const midpoint = (previous.x + target.x) / 2.0;\n    ctx.lineTo(midpoint, previous.y);\n    ctx.lineTo(midpoint, target.y);\n  } else if (mode === 'after' !== !!flip) {\n    ctx.lineTo(previous.x, target.y);\n  } else {\n    ctx.lineTo(target.x, previous.y);\n  }\n  ctx.lineTo(target.x, target.y);\n}\n\n/**\n * @private\n */\nexport function _bezierCurveTo(ctx, previous, target, flip) {\n  if (!previous) {\n    return ctx.lineTo(target.x, target.y);\n  }\n  ctx.bezierCurveTo(\n    flip ? previous.cp1x : previous.cp2x,\n    flip ? previous.cp1y : previous.cp2y,\n    flip ? target.cp2x : target.cp1x,\n    flip ? target.cp2y : target.cp1y,\n    target.x,\n    target.y);\n}\n\n/**\n * Render text onto the canvas\n */\nexport function renderText(ctx, text, x, y, font, opts = {}) {\n  const lines = isArray(text) ? text : [text];\n  const stroke = opts.strokeWidth > 0 && opts.strokeColor !== '';\n  let i, line;\n\n  ctx.save();\n  ctx.font = font.string;\n  setRenderOpts(ctx, opts);\n\n  for (i = 0; i < lines.length; ++i) {\n    line = lines[i];\n\n    if (opts.backdrop) {\n      drawBackdrop(ctx, opts.backdrop);\n    }\n\n    if (stroke) {\n      if (opts.strokeColor) {\n        ctx.strokeStyle = opts.strokeColor;\n      }\n\n      if (!isNullOrUndef(opts.strokeWidth)) {\n        ctx.lineWidth = opts.strokeWidth;\n      }\n\n      ctx.strokeText(line, x, y, opts.maxWidth);\n    }\n\n    ctx.fillText(line, x, y, opts.maxWidth);\n    decorateText(ctx, x, y, line, opts);\n\n    y += font.lineHeight;\n  }\n\n  ctx.restore();\n}\n\nfunction setRenderOpts(ctx, opts) {\n  if (opts.translation) {\n    ctx.translate(opts.translation[0], opts.translation[1]);\n  }\n\n  if (!isNullOrUndef(opts.rotation)) {\n    ctx.rotate(opts.rotation);\n  }\n\n  if (opts.color) {\n    ctx.fillStyle = opts.color;\n  }\n\n  if (opts.textAlign) {\n    ctx.textAlign = opts.textAlign;\n  }\n\n  if (opts.textBaseline) {\n    ctx.textBaseline = opts.textBaseline;\n  }\n}\n\nfunction decorateText(ctx, x, y, line, opts) {\n  if (opts.strikethrough || opts.underline) {\n    /**\n     * Now that IE11 support has been dropped, we can use more\n     * of the TextMetrics object. The actual bounding boxes\n     * are unflagged in Chrome, Firefox, Edge, and Safari so they\n     * can be safely used.\n     * See https://developer.mozilla.org/en-US/docs/Web/API/TextMetrics#Browser_compatibility\n     */\n    const metrics = ctx.measureText(line);\n    const left = x - metrics.actualBoundingBoxLeft;\n    const right = x + metrics.actualBoundingBoxRight;\n    const top = y - metrics.actualBoundingBoxAscent;\n    const bottom = y + metrics.actualBoundingBoxDescent;\n    const yDecoration = opts.strikethrough ? (top + bottom) / 2 : bottom;\n\n    ctx.strokeStyle = ctx.fillStyle;\n    ctx.beginPath();\n    ctx.lineWidth = opts.decorationWidth || 2;\n    ctx.moveTo(left, yDecoration);\n    ctx.lineTo(right, yDecoration);\n    ctx.stroke();\n  }\n}\n\nfunction drawBackdrop(ctx, opts) {\n  const oldColor = ctx.fillStyle;\n\n  ctx.fillStyle = opts.color;\n  ctx.fillRect(opts.left, opts.top, opts.width, opts.height);\n  ctx.fillStyle = oldColor;\n}\n\n/**\n * Add a path of a rectangle with rounded corners to the current sub-path\n * @param {CanvasRenderingContext2D} ctx Context\n * @param {*} rect Bounding rect\n */\nexport function addRoundedRectPath(ctx, rect) {\n  const {x, y, w, h, radius} = rect;\n\n  // top left arc\n  ctx.arc(x + radius.topLeft, y + radius.topLeft, radius.topLeft, -HALF_PI, PI, true);\n\n  // line from top left to bottom left\n  ctx.lineTo(x, y + h - radius.bottomLeft);\n\n  // bottom left arc\n  ctx.arc(x + radius.bottomLeft, y + h - radius.bottomLeft, radius.bottomLeft, PI, HALF_PI, true);\n\n  // line from bottom left to bottom right\n  ctx.lineTo(x + w - radius.bottomRight, y + h);\n\n  // bottom right arc\n  ctx.arc(x + w - radius.bottomRight, y + h - radius.bottomRight, radius.bottomRight, HALF_PI, 0, true);\n\n  // line from bottom right to top right\n  ctx.lineTo(x + w, y + radius.topRight);\n\n  // top right arc\n  ctx.arc(x + w - radius.topRight, y + radius.topRight, radius.topRight, 0, -HALF_PI, true);\n\n  // line from top right to top left\n  ctx.lineTo(x + radius.topLeft, y);\n}\n","import {defined, isArray, isFunction, isObject, resolveObjectKey, _capitalize} from './helpers.core';\n\n/**\n * Creates a Proxy for resolving raw values for options.\n * @param {object[]} scopes - The option scopes to look for values, in resolution order\n * @param {string[]} [prefixes] - The prefixes for values, in resolution order.\n * @param {object[]} [rootScopes] - The root option scopes\n * @param {string|boolean} [fallback] - Parent scopes fallback\n * @param {function} [getTarget] - callback for getting the target for changed values\n * @returns Proxy\n * @private\n */\nexport function _createResolver(scopes, prefixes = [''], rootScopes = scopes, fallback, getTarget = () => scopes[0]) {\n  if (!defined(fallback)) {\n    fallback = _resolve('_fallback', scopes);\n  }\n  const cache = {\n    [Symbol.toStringTag]: 'Object',\n    _cacheable: true,\n    _scopes: scopes,\n    _rootScopes: rootScopes,\n    _fallback: fallback,\n    _getTarget: getTarget,\n    override: (scope) => _createResolver([scope, ...scopes], prefixes, rootScopes, fallback),\n  };\n  return new Proxy(cache, {\n    /**\n     * A trap for the delete operator.\n     */\n    deleteProperty(target, prop) {\n      delete target[prop]; // remove from cache\n      delete target._keys; // remove cached keys\n      delete scopes[0][prop]; // remove from top level scope\n      return true;\n    },\n\n    /**\n     * A trap for getting property values.\n     */\n    get(target, prop) {\n      return _cached(target, prop,\n        () => _resolveWithPrefixes(prop, prefixes, scopes, target));\n    },\n\n    /**\n     * A trap for Object.getOwnPropertyDescriptor.\n     * Also used by Object.hasOwnProperty.\n     */\n    getOwnPropertyDescriptor(target, prop) {\n      return Reflect.getOwnPropertyDescriptor(target._scopes[0], prop);\n    },\n\n    /**\n     * A trap for Object.getPrototypeOf.\n     */\n    getPrototypeOf() {\n      return Reflect.getPrototypeOf(scopes[0]);\n    },\n\n    /**\n     * A trap for the in operator.\n     */\n    has(target, prop) {\n      return getKeysFromAllScopes(target).includes(prop);\n    },\n\n    /**\n     * A trap for Object.getOwnPropertyNames and Object.getOwnPropertySymbols.\n     */\n    ownKeys(target) {\n      return getKeysFromAllScopes(target);\n    },\n\n    /**\n     * A trap for setting property values.\n     */\n    set(target, prop, value) {\n      const storage = target._storage || (target._storage = getTarget());\n      target[prop] = storage[prop] = value; // set to top level scope + cache\n      delete target._keys; // remove cached keys\n      return true;\n    }\n  });\n}\n\n/**\n * Returns an Proxy for resolving option values with context.\n * @param {object} proxy - The Proxy returned by `_createResolver`\n * @param {object} context - Context object for scriptable/indexable options\n * @param {object} [subProxy] - The proxy provided for scriptable options\n * @param {{scriptable: boolean, indexable: boolean, allKeys?: boolean}} [descriptorDefaults] - Defaults for descriptors\n * @private\n */\nexport function _attachContext(proxy, context, subProxy, descriptorDefaults) {\n  const cache = {\n    _cacheable: false,\n    _proxy: proxy,\n    _context: context,\n    _subProxy: subProxy,\n    _stack: new Set(),\n    _descriptors: _descriptors(proxy, descriptorDefaults),\n    setContext: (ctx) => _attachContext(proxy, ctx, subProxy, descriptorDefaults),\n    override: (scope) => _attachContext(proxy.override(scope), context, subProxy, descriptorDefaults)\n  };\n  return new Proxy(cache, {\n    /**\n     * A trap for the delete operator.\n     */\n    deleteProperty(target, prop) {\n      delete target[prop]; // remove from cache\n      delete proxy[prop]; // remove from proxy\n      return true;\n    },\n\n    /**\n     * A trap for getting property values.\n     */\n    get(target, prop, receiver) {\n      return _cached(target, prop,\n        () => _resolveWithContext(target, prop, receiver));\n    },\n\n    /**\n     * A trap for Object.getOwnPropertyDescriptor.\n     * Also used by Object.hasOwnProperty.\n     */\n    getOwnPropertyDescriptor(target, prop) {\n      return target._descriptors.allKeys\n        ? Reflect.has(proxy, prop) ? {enumerable: true, configurable: true} : undefined\n        : Reflect.getOwnPropertyDescriptor(proxy, prop);\n    },\n\n    /**\n     * A trap for Object.getPrototypeOf.\n     */\n    getPrototypeOf() {\n      return Reflect.getPrototypeOf(proxy);\n    },\n\n    /**\n     * A trap for the in operator.\n     */\n    has(target, prop) {\n      return Reflect.has(proxy, prop);\n    },\n\n    /**\n     * A trap for Object.getOwnPropertyNames and Object.getOwnPropertySymbols.\n     */\n    ownKeys() {\n      return Reflect.ownKeys(proxy);\n    },\n\n    /**\n     * A trap for setting property values.\n     */\n    set(target, prop, value) {\n      proxy[prop] = value; // set to proxy\n      delete target[prop]; // remove from cache\n      return true;\n    }\n  });\n}\n\n/**\n * @private\n */\nexport function _descriptors(proxy, defaults = {scriptable: true, indexable: true}) {\n  const {_scriptable = defaults.scriptable, _indexable = defaults.indexable, _allKeys = defaults.allKeys} = proxy;\n  return {\n    allKeys: _allKeys,\n    scriptable: _scriptable,\n    indexable: _indexable,\n    isScriptable: isFunction(_scriptable) ? _scriptable : () => _scriptable,\n    isIndexable: isFunction(_indexable) ? _indexable : () => _indexable\n  };\n}\n\nconst readKey = (prefix, name) => prefix ? prefix + _capitalize(name) : name;\nconst needsSubResolver = (prop, value) => isObject(value) && prop !== 'adapters' &&\n  (Object.getPrototypeOf(value) === null || value.constructor === Object);\n\nfunction _cached(target, prop, resolve) {\n  if (Object.prototype.hasOwnProperty.call(target, prop)) {\n    return target[prop];\n  }\n\n  const value = resolve();\n  // cache the resolved value\n  target[prop] = value;\n  return value;\n}\n\nfunction _resolveWithContext(target, prop, receiver) {\n  const {_proxy, _context, _subProxy, _descriptors: descriptors} = target;\n  let value = _proxy[prop]; // resolve from proxy\n\n  // resolve with context\n  if (isFunction(value) && descriptors.isScriptable(prop)) {\n    value = _resolveScriptable(prop, value, target, receiver);\n  }\n  if (isArray(value) && value.length) {\n    value = _resolveArray(prop, value, target, descriptors.isIndexable);\n  }\n  if (needsSubResolver(prop, value)) {\n    // if the resolved value is an object, create a sub resolver for it\n    value = _attachContext(value, _context, _subProxy && _subProxy[prop], descriptors);\n  }\n  return value;\n}\n\nfunction _resolveScriptable(prop, value, target, receiver) {\n  const {_proxy, _context, _subProxy, _stack} = target;\n  if (_stack.has(prop)) {\n    // @ts-ignore\n    throw new Error('Recursion detected: ' + Array.from(_stack).join('->') + '->' + prop);\n  }\n  _stack.add(prop);\n  value = value(_context, _subProxy || receiver);\n  _stack.delete(prop);\n  if (needsSubResolver(prop, value)) {\n    // When scriptable option returns an object, create a resolver on that.\n    value = createSubResolver(_proxy._scopes, _proxy, prop, value);\n  }\n  return value;\n}\n\nfunction _resolveArray(prop, value, target, isIndexable) {\n  const {_proxy, _context, _subProxy, _descriptors: descriptors} = target;\n\n  if (defined(_context.index) && isIndexable(prop)) {\n    value = value[_context.index % value.length];\n  } else if (isObject(value[0])) {\n    // Array of objects, return array or resolvers\n    const arr = value;\n    const scopes = _proxy._scopes.filter(s => s !== arr);\n    value = [];\n    for (const item of arr) {\n      const resolver = createSubResolver(scopes, _proxy, prop, item);\n      value.push(_attachContext(resolver, _context, _subProxy && _subProxy[prop], descriptors));\n    }\n  }\n  return value;\n}\n\nfunction resolveFallback(fallback, prop, value) {\n  return isFunction(fallback) ? fallback(prop, value) : fallback;\n}\n\nconst getScope = (key, parent) => key === true ? parent\n  : typeof key === 'string' ? resolveObjectKey(parent, key) : undefined;\n\nfunction addScopes(set, parentScopes, key, parentFallback, value) {\n  for (const parent of parentScopes) {\n    const scope = getScope(key, parent);\n    if (scope) {\n      set.add(scope);\n      const fallback = resolveFallback(scope._fallback, key, value);\n      if (defined(fallback) && fallback !== key && fallback !== parentFallback) {\n        // When we reach the descriptor that defines a new _fallback, return that.\n        // The fallback will resume to that new scope.\n        return fallback;\n      }\n    } else if (scope === false && defined(parentFallback) && key !== parentFallback) {\n      // Fallback to `false` results to `false`, when falling back to different key.\n      // For example `interaction` from `hover` or `plugins.tooltip` and `animation` from `animations`\n      return null;\n    }\n  }\n  return false;\n}\n\nfunction createSubResolver(parentScopes, resolver, prop, value) {\n  const rootScopes = resolver._rootScopes;\n  const fallback = resolveFallback(resolver._fallback, prop, value);\n  const allScopes = [...parentScopes, ...rootScopes];\n  const set = new Set();\n  set.add(value);\n  let key = addScopesFromKey(set, allScopes, prop, fallback || prop, value);\n  if (key === null) {\n    return false;\n  }\n  if (defined(fallback) && fallback !== prop) {\n    key = addScopesFromKey(set, allScopes, fallback, key, value);\n    if (key === null) {\n      return false;\n    }\n  }\n  return _createResolver(Array.from(set), [''], rootScopes, fallback,\n    () => subGetTarget(resolver, prop, value));\n}\n\nfunction addScopesFromKey(set, allScopes, key, fallback, item) {\n  while (key) {\n    key = addScopes(set, allScopes, key, fallback, item);\n  }\n  return key;\n}\n\nfunction subGetTarget(resolver, prop, value) {\n  const parent = resolver._getTarget();\n  if (!(prop in parent)) {\n    parent[prop] = {};\n  }\n  const target = parent[prop];\n  if (isArray(target) && isObject(value)) {\n    // For array of objects, the object is used to store updated values\n    return value;\n  }\n  return target || {};\n}\n\nfunction _resolveWithPrefixes(prop, prefixes, scopes, proxy) {\n  let value;\n  for (const prefix of prefixes) {\n    value = _resolve(readKey(prefix, prop), scopes);\n    if (defined(value)) {\n      return needsSubResolver(prop, value)\n        ? createSubResolver(scopes, proxy, prop, value)\n        : value;\n    }\n  }\n}\n\nfunction _resolve(key, scopes) {\n  for (const scope of scopes) {\n    if (!scope) {\n      continue;\n    }\n    const value = scope[key];\n    if (defined(value)) {\n      return value;\n    }\n  }\n}\n\nfunction getKeysFromAllScopes(target) {\n  let keys = target._keys;\n  if (!keys) {\n    keys = target._keys = resolveKeysFromAllScopes(target._scopes);\n  }\n  return keys;\n}\n\nfunction resolveKeysFromAllScopes(scopes) {\n  const set = new Set();\n  for (const scope of scopes) {\n    for (const key of Object.keys(scope).filter(k => !k.startsWith('_'))) {\n      set.add(key);\n    }\n  }\n  return Array.from(set);\n}\n\nexport function _parseObjectDataRadialScale(meta, data, start, count) {\n  const {iScale} = meta;\n  const {key = 'r'} = this._parsing;\n  const parsed = new Array(count);\n  let i, ilen, index, item;\n\n  for (i = 0, ilen = count; i < ilen; ++i) {\n    index = i + start;\n    item = data[index];\n    parsed[i] = {\n      r: iScale.parse(resolveObjectKey(item, key), index)\n    };\n  }\n  return parsed;\n}\n","import {almostEquals, distanceBetweenPoints, sign} from './helpers.math';\nimport {_isPointInArea} from './helpers.canvas';\nimport {ChartArea} from '../../types';\n\nexport interface SplinePoint {\n  x: number;\n  y: number;\n  skip?: boolean;\n\n  // Both Bezier and monotone interpolations have these fields\n  // but they are added in different spots\n  cp1x?: number;\n  cp1y?: number;\n  cp2x?: number;\n  cp2y?: number;\n}\n\nconst EPSILON = Number.EPSILON || 1e-14;\n\ntype OptionalSplinePoint = SplinePoint | false\nconst getPoint = (points: SplinePoint[], i: number): OptionalSplinePoint => i < points.length && !points[i].skip && points[i];\nconst getValueAxis = (indexAxis: 'x' | 'y') => indexAxis === 'x' ? 'y' : 'x';\n\nexport function splineCurve(\n  firstPoint: SplinePoint,\n  middlePoint: SplinePoint,\n  afterPoint: SplinePoint,\n  t: number\n): {\n    previous: SplinePoint\n    next: SplinePoint\n  } {\n  // Props to Rob Spencer at scaled innovation for his post on splining between points\n  // http://scaledinnovation.com/analytics/splines/aboutSplines.html\n\n  // This function must also respect \"skipped\" points\n\n  const previous = firstPoint.skip ? middlePoint : firstPoint;\n  const current = middlePoint;\n  const next = afterPoint.skip ? middlePoint : afterPoint;\n  const d01 = distanceBetweenPoints(current, previous);\n  const d12 = distanceBetweenPoints(next, current);\n\n  let s01 = d01 / (d01 + d12);\n  let s12 = d12 / (d01 + d12);\n\n  // If all points are the same, s01 & s02 will be inf\n  s01 = isNaN(s01) ? 0 : s01;\n  s12 = isNaN(s12) ? 0 : s12;\n\n  const fa = t * s01; // scaling factor for triangle Ta\n  const fb = t * s12;\n\n  return {\n    previous: {\n      x: current.x - fa * (next.x - previous.x),\n      y: current.y - fa * (next.y - previous.y)\n    },\n    next: {\n      x: current.x + fb * (next.x - previous.x),\n      y: current.y + fb * (next.y - previous.y)\n    }\n  };\n}\n\n/**\n * Adjust tangents to ensure monotonic properties\n */\nfunction monotoneAdjust(points: SplinePoint[], deltaK: number[], mK: number[]) {\n  const pointsLen = points.length;\n\n  let alphaK: number, betaK: number, tauK: number, squaredMagnitude: number, pointCurrent: OptionalSplinePoint;\n  let pointAfter = getPoint(points, 0);\n  for (let i = 0; i < pointsLen - 1; ++i) {\n    pointCurrent = pointAfter;\n    pointAfter = getPoint(points, i + 1);\n    if (!pointCurrent || !pointAfter) {\n      continue;\n    }\n\n    if (almostEquals(deltaK[i], 0, EPSILON)) {\n      mK[i] = mK[i + 1] = 0;\n      continue;\n    }\n\n    alphaK = mK[i] / deltaK[i];\n    betaK = mK[i + 1] / deltaK[i];\n    squaredMagnitude = Math.pow(alphaK, 2) + Math.pow(betaK, 2);\n    if (squaredMagnitude <= 9) {\n      continue;\n    }\n\n    tauK = 3 / Math.sqrt(squaredMagnitude);\n    mK[i] = alphaK * tauK * deltaK[i];\n    mK[i + 1] = betaK * tauK * deltaK[i];\n  }\n}\n\nfunction monotoneCompute(points: SplinePoint[], mK: number[], indexAxis: 'x' | 'y' = 'x') {\n  const valueAxis = getValueAxis(indexAxis);\n  const pointsLen = points.length;\n  let delta: number, pointBefore: OptionalSplinePoint, pointCurrent: OptionalSplinePoint;\n  let pointAfter = getPoint(points, 0);\n\n  for (let i = 0; i < pointsLen; ++i) {\n    pointBefore = pointCurrent;\n    pointCurrent = pointAfter;\n    pointAfter = getPoint(points, i + 1);\n    if (!pointCurrent) {\n      continue;\n    }\n\n    const iPixel = pointCurrent[indexAxis];\n    const vPixel = pointCurrent[valueAxis];\n    if (pointBefore) {\n      delta = (iPixel - pointBefore[indexAxis]) / 3;\n      pointCurrent[`cp1${indexAxis}`] = iPixel - delta;\n      pointCurrent[`cp1${valueAxis}`] = vPixel - delta * mK[i];\n    }\n    if (pointAfter) {\n      delta = (pointAfter[indexAxis] - iPixel) / 3;\n      pointCurrent[`cp2${indexAxis}`] = iPixel + delta;\n      pointCurrent[`cp2${valueAxis}`] = vPixel + delta * mK[i];\n    }\n  }\n}\n\n/**\n * This function calculates Bézier control points in a similar way than |splineCurve|,\n * but preserves monotonicity of the provided data and ensures no local extremums are added\n * between the dataset discrete points due to the interpolation.\n * See : https://en.wikipedia.org/wiki/Monotone_cubic_interpolation\n */\nexport function splineCurveMonotone(points: SplinePoint[], indexAxis: 'x' | 'y' = 'x') {\n  const valueAxis = getValueAxis(indexAxis);\n  const pointsLen = points.length;\n  const deltaK: number[] = Array(pointsLen).fill(0);\n  const mK: number[] = Array(pointsLen);\n\n  // Calculate slopes (deltaK) and initialize tangents (mK)\n  let i, pointBefore: OptionalSplinePoint, pointCurrent: OptionalSplinePoint;\n  let pointAfter = getPoint(points, 0);\n\n  for (i = 0; i < pointsLen; ++i) {\n    pointBefore = pointCurrent;\n    pointCurrent = pointAfter;\n    pointAfter = getPoint(points, i + 1);\n    if (!pointCurrent) {\n      continue;\n    }\n\n    if (pointAfter) {\n      const slopeDelta = pointAfter[indexAxis] - pointCurrent[indexAxis];\n\n      // In the case of two points that appear at the same x pixel, slopeDeltaX is 0\n      deltaK[i] = slopeDelta !== 0 ? (pointAfter[valueAxis] - pointCurrent[valueAxis]) / slopeDelta : 0;\n    }\n    mK[i] = !pointBefore ? deltaK[i]\n      : !pointAfter ? deltaK[i - 1]\n        : (sign(deltaK[i - 1]) !== sign(deltaK[i])) ? 0\n          : (deltaK[i - 1] + deltaK[i]) / 2;\n  }\n\n  monotoneAdjust(points, deltaK, mK);\n\n  monotoneCompute(points, mK, indexAxis);\n}\n\nfunction capControlPoint(pt: number, min: number, max: number) {\n  return Math.max(Math.min(pt, max), min);\n}\n\nfunction capBezierPoints(points: SplinePoint[], area: ChartArea) {\n  let i, ilen, point, inArea, inAreaPrev;\n  let inAreaNext = _isPointInArea(points[0], area);\n  for (i = 0, ilen = points.length; i < ilen; ++i) {\n    inAreaPrev = inArea;\n    inArea = inAreaNext;\n    inAreaNext = i < ilen - 1 && _isPointInArea(points[i + 1], area);\n    if (!inArea) {\n      continue;\n    }\n    point = points[i];\n    if (inAreaPrev) {\n      point.cp1x = capControlPoint(point.cp1x, area.left, area.right);\n      point.cp1y = capControlPoint(point.cp1y, area.top, area.bottom);\n    }\n    if (inAreaNext) {\n      point.cp2x = capControlPoint(point.cp2x, area.left, area.right);\n      point.cp2y = capControlPoint(point.cp2y, area.top, area.bottom);\n    }\n  }\n}\n\n/**\n * @private\n */\nexport function _updateBezierControlPoints(\n  points: SplinePoint[],\n  options,\n  area: ChartArea,\n  loop: boolean,\n  indexAxis: 'x' | 'y'\n) {\n  let i: number, ilen: number, point: SplinePoint, controlPoints: ReturnType<typeof splineCurve>;\n\n  // Only consider points that are drawn in case the spanGaps option is used\n  if (options.spanGaps) {\n    points = points.filter((pt) => !pt.skip);\n  }\n\n  if (options.cubicInterpolationMode === 'monotone') {\n    splineCurveMonotone(points, indexAxis);\n  } else {\n    let prev = loop ? points[points.length - 1] : points[0];\n    for (i = 0, ilen = points.length; i < ilen; ++i) {\n      point = points[i];\n      controlPoints = splineCurve(\n        prev,\n        point,\n        points[Math.min(i + 1, ilen - (loop ? 0 : 1)) % ilen],\n        options.tension\n      );\n      point.cp1x = controlPoints.previous.x;\n      point.cp1y = controlPoints.previous.y;\n      point.cp2x = controlPoints.next.x;\n      point.cp2y = controlPoints.next.y;\n      prev = point;\n    }\n  }\n\n  if (options.capBezierPoints) {\n    capBezierPoints(points, area);\n  }\n}\n","import {PI, TAU, HALF_PI} from './helpers.math';\n\nconst atEdge = (t: number) => t === 0 || t === 1;\nconst elasticIn = (t: number, s: number, p: number) => -(Math.pow(2, 10 * (t -= 1)) * Math.sin((t - s) * TAU / p));\nconst elasticOut = (t: number, s: number, p: number) => Math.pow(2, -10 * t) * Math.sin((t - s) * TAU / p) + 1;\n\n/**\n * Easing functions adapted from Robert Penner's easing equations.\n * @namespace Chart.helpers.easing.effects\n * @see http://www.robertpenner.com/easing/\n */\nconst effects = {\n  linear: (t: number) => t,\n\n  easeInQuad: (t: number) => t * t,\n\n  easeOutQuad: (t: number) => -t * (t - 2),\n\n  easeInOutQuad: (t: number) => ((t /= 0.5) < 1)\n    ? 0.5 * t * t\n    : -0.5 * ((--t) * (t - 2) - 1),\n\n  easeInCubic: (t: number) => t * t * t,\n\n  easeOutCubic: (t: number) => (t -= 1) * t * t + 1,\n\n  easeInOutCubic: (t: number) => ((t /= 0.5) < 1)\n    ? 0.5 * t * t * t\n    : 0.5 * ((t -= 2) * t * t + 2),\n\n  easeInQuart: (t: number) => t * t * t * t,\n\n  easeOutQuart: (t: number) => -((t -= 1) * t * t * t - 1),\n\n  easeInOutQuart: (t: number) => ((t /= 0.5) < 1)\n    ? 0.5 * t * t * t * t\n    : -0.5 * ((t -= 2) * t * t * t - 2),\n\n  easeInQuint: (t: number) => t * t * t * t * t,\n\n  easeOutQuint: (t: number) => (t -= 1) * t * t * t * t + 1,\n\n  easeInOutQuint: (t: number) => ((t /= 0.5) < 1)\n    ? 0.5 * t * t * t * t * t\n    : 0.5 * ((t -= 2) * t * t * t * t + 2),\n\n  easeInSine: (t: number) => -Math.cos(t * HALF_PI) + 1,\n\n  easeOutSine: (t: number) => Math.sin(t * HALF_PI),\n\n  easeInOutSine: (t: number) => -0.5 * (Math.cos(PI * t) - 1),\n\n  easeInExpo: (t: number) => (t === 0) ? 0 : Math.pow(2, 10 * (t - 1)),\n\n  easeOutExpo: (t: number) => (t === 1) ? 1 : -Math.pow(2, -10 * t) + 1,\n\n  easeInOutExpo: (t: number) => atEdge(t) ? t : t < 0.5\n    ? 0.5 * Math.pow(2, 10 * (t * 2 - 1))\n    : 0.5 * (-Math.pow(2, -10 * (t * 2 - 1)) + 2),\n\n  easeInCirc: (t: number) => (t >= 1) ? t : -(Math.sqrt(1 - t * t) - 1),\n\n  easeOutCirc: (t: number) => Math.sqrt(1 - (t -= 1) * t),\n\n  easeInOutCirc: (t: number) => ((t /= 0.5) < 1)\n    ? -0.5 * (Math.sqrt(1 - t * t) - 1)\n    : 0.5 * (Math.sqrt(1 - (t -= 2) * t) + 1),\n\n  easeInElastic: (t: number) => atEdge(t) ? t : elasticIn(t, 0.075, 0.3),\n\n  easeOutElastic: (t: number) => atEdge(t) ? t : elasticOut(t, 0.075, 0.3),\n\n  easeInOutElastic(t: number) {\n    const s = 0.1125;\n    const p = 0.45;\n    return atEdge(t) ? t :\n      t < 0.5\n        ? 0.5 * elasticIn(t * 2, s, p)\n        : 0.5 + 0.5 * elasticOut(t * 2 - 1, s, p);\n  },\n\n  easeInBack(t: number) {\n    const s = 1.70158;\n    return t * t * ((s + 1) * t - s);\n  },\n\n  easeOutBack(t: number) {\n    const s = 1.70158;\n    return (t -= 1) * t * ((s + 1) * t + s) + 1;\n  },\n\n  easeInOutBack(t: number) {\n    let s = 1.70158;\n    if ((t /= 0.5) < 1) {\n      return 0.5 * (t * t * (((s *= (1.525)) + 1) * t - s));\n    }\n    return 0.5 * ((t -= 2) * t * (((s *= (1.525)) + 1) * t + s) + 2);\n  },\n\n  easeInBounce: (t: number) => 1 - effects.easeOutBounce(1 - t),\n\n  easeOutBounce(t: number) {\n    const m = 7.5625;\n    const d = 2.75;\n    if (t < (1 / d)) {\n      return m * t * t;\n    }\n    if (t < (2 / d)) {\n      return m * (t -= (1.5 / d)) * t + 0.75;\n    }\n    if (t < (2.5 / d)) {\n      return m * (t -= (2.25 / d)) * t + 0.9375;\n    }\n    return m * (t -= (2.625 / d)) * t + 0.984375;\n  },\n\n  easeInOutBounce: (t: number) => (t < 0.5)\n    ? effects.easeInBounce(t * 2) * 0.5\n    : effects.easeOutBounce(t * 2 - 1) * 0.5 + 0.5,\n} as const;\n\nexport type EasingFunction = keyof typeof effects\n\nexport default effects;\n","import type {Point} from '../../types/geometric';\nimport type {SplinePoint} from './helpers.curve';\n\n/**\n * @private\n */\nexport function _pointInLine(p1: Point, p2: Point, t: number, mode?) { // eslint-disable-line @typescript-eslint/no-unused-vars\n  return {\n    x: p1.x + t * (p2.x - p1.x),\n    y: p1.y + t * (p2.y - p1.y)\n  };\n}\n\n/**\n * @private\n */\nexport function _steppedInterpolation(\n  p1: Point,\n  p2: Point,\n  t: number, mode: 'middle' | 'after' | unknown\n) {\n  return {\n    x: p1.x + t * (p2.x - p1.x),\n    y: mode === 'middle' ? t < 0.5 ? p1.y : p2.y\n      : mode === 'after' ? t < 1 ? p1.y : p2.y\n        : t > 0 ? p2.y : p1.y\n  };\n}\n\n/**\n * @private\n */\nexport function _bezierInterpolation(p1: SplinePoint, p2: SplinePoint, t: number, mode?) { // eslint-disable-line @typescript-eslint/no-unused-vars\n  const cp1 = {x: p1.cp2x, y: p1.cp2y};\n  const cp2 = {x: p2.cp1x, y: p2.cp1y};\n  const a = _pointInLine(p1, cp1, t);\n  const b = _pointInLine(cp1, cp2, t);\n  const c = _pointInLine(cp2, p2, t);\n  const d = _pointInLine(a, b, t);\n  const e = _pointInLine(b, c, t);\n  return _pointInLine(d, e, t);\n}\n","import defaults from '../core/core.defaults';\nimport {isArray, isObject, toDimension, valueOrDefault} from './helpers.core';\nimport {Point, toFontString} from './helpers.canvas';\nimport type {ChartArea, FontSpec} from '../../types';\nimport type {TRBL, TRBLCorners} from '../../types/geometric';\n\nconst LINE_HEIGHT = /^(normal|(\\d+(?:\\.\\d+)?)(px|em|%)?)$/;\nconst FONT_STYLE = /^(normal|italic|initial|inherit|unset|(oblique( -?[0-9]?[0-9]deg)?))$/;\n\n/**\n * @alias Chart.helpers.options\n * @namespace\n */\n/**\n * Converts the given line height `value` in pixels for a specific font `size`.\n * @param value - The lineHeight to parse (eg. 1.6, '14px', '75%', '1.6em').\n * @param size - The font size (in pixels) used to resolve relative `value`.\n * @returns The effective line height in pixels (size * 1.2 if value is invalid).\n * @see https://developer.mozilla.org/en-US/docs/Web/CSS/line-height\n * @since 2.7.0\n */\nexport function toLineHeight(value: number | string, size: number): number {\n  const matches = ('' + value).match(LINE_HEIGHT);\n  if (!matches || matches[1] === 'normal') {\n    return size * 1.2;\n  }\n\n  value = +matches[2];\n\n  switch (matches[3]) {\n    case 'px':\n      return value;\n    case '%':\n      value /= 100;\n      break;\n    default:\n      break;\n  }\n\n  return size * value;\n}\n\nconst numberOrZero = (v: unknown) => +v || 0;\n\n/**\n * @param value\n * @param props\n */\nexport function _readValueToProps<K extends string>(value: number | Record<K, number>, props: K[]): Record<K, number>;\nexport function _readValueToProps<K extends string, T extends string>(value: number | Record<K & T, number>, props: Record<T, K>): Record<T, number>;\nexport function _readValueToProps(value: number | Record<string, number>, props: string[] | Record<string, string>) {\n  const ret = {};\n  const objProps = isObject(props);\n  const keys = objProps ? Object.keys(props) : props;\n  const read = isObject(value)\n    ? objProps\n      ? prop => valueOrDefault(value[prop], value[props[prop]])\n      : prop => value[prop]\n    : () => value;\n\n  for (const prop of keys) {\n    ret[prop] = numberOrZero(read(prop));\n  }\n  return ret;\n}\n\n/**\n * Converts the given value into a TRBL object.\n * @param value - If a number, set the value to all TRBL component,\n *  else, if an object, use defined properties and sets undefined ones to 0.\n *  x / y are shorthands for same value for left/right and top/bottom.\n * @returns The padding values (top, right, bottom, left)\n * @since 3.0.0\n */\nexport function toTRBL(value: number | TRBL | Point) {\n  return _readValueToProps(value, {top: 'y', right: 'x', bottom: 'y', left: 'x'});\n}\n\n/**\n * Converts the given value into a TRBL corners object (similar with css border-radius).\n * @param value - If a number, set the value to all TRBL corner components,\n *  else, if an object, use defined properties and sets undefined ones to 0.\n * @returns The TRBL corner values (topLeft, topRight, bottomLeft, bottomRight)\n * @since 3.0.0\n */\nexport function toTRBLCorners(value: number | TRBLCorners) {\n  return _readValueToProps(value, ['topLeft', 'topRight', 'bottomLeft', 'bottomRight']);\n}\n\n/**\n * Converts the given value into a padding object with pre-computed width/height.\n * @param value - If a number, set the value to all TRBL component,\n *  else, if an object, use defined properties and sets undefined ones to 0.\n *  x / y are shorthands for same value for left/right and top/bottom.\n * @returns The padding values (top, right, bottom, left, width, height)\n * @since 2.7.0\n */\nexport function toPadding(value?: number | TRBL): ChartArea {\n  const obj = toTRBL(value) as ChartArea;\n\n  obj.width = obj.left + obj.right;\n  obj.height = obj.top + obj.bottom;\n\n  return obj;\n}\n\nexport interface CanvasFontSpec extends FontSpec {\n  string: string;\n}\n\n/**\n * Parses font options and returns the font object.\n * @param options - A object that contains font options to be parsed.\n * @param fallback - A object that contains fallback font options.\n * @return The font object.\n * @private\n */\n\nexport function toFont(options: Partial<FontSpec>, fallback?: Partial<FontSpec>) {\n  options = options || {};\n  fallback = fallback || defaults.font as FontSpec;\n\n  let size = valueOrDefault(options.size, fallback.size);\n\n  if (typeof size === 'string') {\n    size = parseInt(size, 10);\n  }\n  let style = valueOrDefault(options.style, fallback.style);\n  if (style && !('' + style).match(FONT_STYLE)) {\n    console.warn('Invalid font style specified: \"' + style + '\"');\n    style = undefined;\n  }\n\n  const font = {\n    family: valueOrDefault(options.family, fallback.family),\n    lineHeight: toLineHeight(valueOrDefault(options.lineHeight, fallback.lineHeight), size),\n    size,\n    style,\n    weight: valueOrDefault(options.weight, fallback.weight),\n    string: ''\n  };\n\n  font.string = toFontString(font);\n  return font;\n}\n\n/**\n * Evaluates the given `inputs` sequentially and returns the first defined value.\n * @param inputs - An array of values, falling back to the last value.\n * @param context - If defined and the current value is a function, the value\n * is called with `context` as first argument and the result becomes the new input.\n * @param index - If defined and the current value is an array, the value\n * at `index` become the new input.\n * @param info - object to return information about resolution in\n * @param info.cacheable - Will be set to `false` if option is not cacheable.\n * @since 2.7.0\n */\nexport function resolve(inputs: Array<unknown>, context?: object, index?: number, info?: { cacheable: boolean }) {\n  let cacheable = true;\n  let i: number, ilen: number, value: unknown;\n\n  for (i = 0, ilen = inputs.length; i < ilen; ++i) {\n    value = inputs[i];\n    if (value === undefined) {\n      continue;\n    }\n    if (context !== undefined && typeof value === 'function') {\n      value = value(context);\n      cacheable = false;\n    }\n    if (index !== undefined && isArray(value)) {\n      value = value[index % value.length];\n      cacheable = false;\n    }\n    if (value !== undefined) {\n      if (info && !cacheable) {\n        info.cacheable = false;\n      }\n      return value;\n    }\n  }\n}\n\n/**\n * @param minmax\n * @param grace\n * @param beginAtZero\n * @private\n */\nexport function _addGrace(minmax: { min: number; max: number; }, grace: number | string, beginAtZero: boolean) {\n  const {min, max} = minmax;\n  const change = toDimension(grace, (max - min) / 2);\n  const keepZero = (value: number, add: number) => beginAtZero && value === 0 ? 0 : value + add;\n  return {\n    min: keepZero(min, -Math.abs(change)),\n    max: keepZero(max, change)\n  };\n}\n\n/**\n * Create a context inheriting parentContext\n * @param parentContext\n * @param context\n * @returns\n */\nexport function createContext<P extends T, T extends object>(parentContext: P, context: T): P extends null ? T : P & T {\n  return Object.assign(Object.create(parentContext), context);\n}\n","export interface RTLAdapter {\n  x(x: number): number;\n  setWidth(w: number): void;\n  textAlign(align: 'center' | 'left' | 'right'): 'center' | 'left' | 'right';\n  xPlus(x: number, value: number): number;\n  leftForLtr(x: number, itemWidth: number): number;\n}\n\nconst getRightToLeftAdapter = function(rectX: number, width: number): RTLAdapter {\n  return {\n    x(x) {\n      return rectX + rectX + width - x;\n    },\n    setWidth(w) {\n      width = w;\n    },\n    textAlign(align) {\n      if (align === 'center') {\n        return align;\n      }\n      return align === 'right' ? 'left' : 'right';\n    },\n    xPlus(x, value) {\n      return x - value;\n    },\n    leftForLtr(x, itemWidth) {\n      return x - itemWidth;\n    },\n  };\n};\n\nconst getLeftToRightAdapter = function(): RTLAdapter {\n  return {\n    x(x) {\n      return x;\n    },\n    setWidth(w) { // eslint-disable-line no-unused-vars\n    },\n    textAlign(align) {\n      return align;\n    },\n    xPlus(x, value) {\n      return x + value;\n    },\n    leftForLtr(x, _itemWidth) { // eslint-disable-line @typescript-eslint/no-unused-vars\n      return x;\n    },\n  };\n};\n\nexport function getRtlAdapter(rtl: boolean, rectX: number, width: number) {\n  return rtl ? getRightToLeftAdapter(rectX, width) : getLeftToRightAdapter();\n}\n\nexport function overrideTextDirection(ctx: CanvasRenderingContext2D, direction: 'ltr' | 'rtl') {\n  let style: CSSStyleDeclaration, original: [string, string];\n  if (direction === 'ltr' || direction === 'rtl') {\n    style = ctx.canvas.style;\n    original = [\n      style.getPropertyValue('direction'),\n      style.getPropertyPriority('direction'),\n    ];\n\n    style.setProperty('direction', direction, 'important');\n    (ctx as { prevTextDirection?: [string, string] }).prevTextDirection = original;\n  }\n}\n\nexport function restoreTextDirection(ctx: CanvasRenderingContext2D, original?: [string, string]) {\n  if (original !== undefined) {\n    delete (ctx as { prevTextDirection?: [string, string] }).prevTextDirection;\n    ctx.canvas.style.setProperty('direction', original[0], original[1]);\n  }\n}\n","import {_angleBetween, _angleDiff, _isBetween, _normalizeAngle} from './helpers.math';\nimport {createContext} from './helpers.options';\n\n/**\n * @typedef { import(\"../elements/element.line\").default } LineElement\n * @typedef { import(\"../elements/element.point\").default } PointElement\n * @typedef {{start: number, end: number, loop: boolean, style?: any}} Segment\n */\n\nfunction propertyFn(property) {\n  if (property === 'angle') {\n    return {\n      between: _angleBetween,\n      compare: _angleDiff,\n      normalize: _normalizeAngle,\n    };\n  }\n  return {\n    between: _isBetween,\n    compare: (a, b) => a - b,\n    normalize: x => x\n  };\n}\n\nfunction normalizeSegment({start, end, count, loop, style}) {\n  return {\n    start: start % count,\n    end: end % count,\n    loop: loop && (end - start + 1) % count === 0,\n    style\n  };\n}\n\nfunction getSegment(segment, points, bounds) {\n  const {property, start: startBound, end: endBound} = bounds;\n  const {between, normalize} = propertyFn(property);\n  const count = points.length;\n  // eslint-disable-next-line prefer-const\n  let {start, end, loop} = segment;\n  let i, ilen;\n\n  if (loop) {\n    start += count;\n    end += count;\n    for (i = 0, ilen = count; i < ilen; ++i) {\n      if (!between(normalize(points[start % count][property]), startBound, endBound)) {\n        break;\n      }\n      start--;\n      end--;\n    }\n    start %= count;\n    end %= count;\n  }\n\n  if (end < start) {\n    end += count;\n  }\n  return {start, end, loop, style: segment.style};\n}\n\n/**\n * Returns the sub-segment(s) of a line segment that fall in the given bounds\n * @param {object} segment\n * @param {number} segment.start - start index of the segment, referring the points array\n * @param {number} segment.end - end index of the segment, referring the points array\n * @param {boolean} segment.loop - indicates that the segment is a loop\n * @param {object} [segment.style] - segment style\n * @param {PointElement[]} points - the points that this segment refers to\n * @param {object} [bounds]\n * @param {string} bounds.property - the property of a `PointElement` we are bounding. `x`, `y` or `angle`.\n * @param {number} bounds.start - start value of the property\n * @param {number} bounds.end - end value of the property\n * @private\n **/\nexport function _boundSegment(segment, points, bounds) {\n  if (!bounds) {\n    return [segment];\n  }\n\n  const {property, start: startBound, end: endBound} = bounds;\n  const count = points.length;\n  const {compare, between, normalize} = propertyFn(property);\n  const {start, end, loop, style} = getSegment(segment, points, bounds);\n\n  const result = [];\n  let inside = false;\n  let subStart = null;\n  let value, point, prevValue;\n\n  const startIsBefore = () => between(startBound, prevValue, value) && compare(startBound, prevValue) !== 0;\n  const endIsBefore = () => compare(endBound, value) === 0 || between(endBound, prevValue, value);\n  const shouldStart = () => inside || startIsBefore();\n  const shouldStop = () => !inside || endIsBefore();\n\n  for (let i = start, prev = start; i <= end; ++i) {\n    point = points[i % count];\n\n    if (point.skip) {\n      continue;\n    }\n\n    value = normalize(point[property]);\n\n    if (value === prevValue) {\n      continue;\n    }\n\n    inside = between(value, startBound, endBound);\n\n    if (subStart === null && shouldStart()) {\n      subStart = compare(value, startBound) === 0 ? i : prev;\n    }\n\n    if (subStart !== null && shouldStop()) {\n      result.push(normalizeSegment({start: subStart, end: i, loop, count, style}));\n      subStart = null;\n    }\n    prev = i;\n    prevValue = value;\n  }\n\n  if (subStart !== null) {\n    result.push(normalizeSegment({start: subStart, end, loop, count, style}));\n  }\n\n  return result;\n}\n\n\n/**\n * Returns the segments of the line that are inside given bounds\n * @param {LineElement} line\n * @param {object} [bounds]\n * @param {string} bounds.property - the property we are bounding with. `x`, `y` or `angle`.\n * @param {number} bounds.start - start value of the `property`\n * @param {number} bounds.end - end value of the `property`\n * @private\n */\nexport function _boundSegments(line, bounds) {\n  const result = [];\n  const segments = line.segments;\n\n  for (let i = 0; i < segments.length; i++) {\n    const sub = _boundSegment(segments[i], line.points, bounds);\n    if (sub.length) {\n      result.push(...sub);\n    }\n  }\n  return result;\n}\n\n/**\n * Find start and end index of a line.\n */\nfunction findStartAndEnd(points, count, loop, spanGaps) {\n  let start = 0;\n  let end = count - 1;\n\n  if (loop && !spanGaps) {\n    // loop and not spanning gaps, first find a gap to start from\n    while (start < count && !points[start].skip) {\n      start++;\n    }\n  }\n\n  // find first non skipped point (after the first gap possibly)\n  while (start < count && points[start].skip) {\n    start++;\n  }\n\n  // if we looped to count, start needs to be 0\n  start %= count;\n\n  if (loop) {\n    // loop will go past count, if start > 0\n    end += start;\n  }\n\n  while (end > start && points[end % count].skip) {\n    end--;\n  }\n\n  // end could be more than count, normalize\n  end %= count;\n\n  return {start, end};\n}\n\n/**\n * Compute solid segments from Points, when spanGaps === false\n * @param {PointElement[]} points - the points\n * @param {number} start - start index\n * @param {number} max - max index (can go past count on a loop)\n * @param {boolean} loop - boolean indicating that this would be a loop if no gaps are found\n */\nfunction solidSegments(points, start, max, loop) {\n  const count = points.length;\n  const result = [];\n  let last = start;\n  let prev = points[start];\n  let end;\n\n  for (end = start + 1; end <= max; ++end) {\n    const cur = points[end % count];\n    if (cur.skip || cur.stop) {\n      if (!prev.skip) {\n        loop = false;\n        result.push({start: start % count, end: (end - 1) % count, loop});\n        // @ts-ignore\n        start = last = cur.stop ? end : null;\n      }\n    } else {\n      last = end;\n      if (prev.skip) {\n        start = end;\n      }\n    }\n    prev = cur;\n  }\n\n  if (last !== null) {\n    result.push({start: start % count, end: last % count, loop});\n  }\n\n  return result;\n}\n\n/**\n * Compute the continuous segments that define the whole line\n * There can be skipped points within a segment, if spanGaps is true.\n * @param {LineElement} line\n * @param {object} [segmentOptions]\n * @return {Segment[]}\n * @private\n */\nexport function _computeSegments(line, segmentOptions) {\n  const points = line.points;\n  const spanGaps = line.options.spanGaps;\n  const count = points.length;\n\n  if (!count) {\n    return [];\n  }\n\n  const loop = !!line._loop;\n  const {start, end} = findStartAndEnd(points, count, loop, spanGaps);\n\n  if (spanGaps === true) {\n    return splitByStyles(line, [{start, end, loop}], points, segmentOptions);\n  }\n\n  const max = end < start ? end + count : end;\n  const completeLoop = !!line._fullLoop && start === 0 && end === count - 1;\n  return splitByStyles(line, solidSegments(points, start, max, completeLoop), points, segmentOptions);\n}\n\n/**\n * @param {Segment[]} segments\n * @param {PointElement[]} points\n * @param {object} [segmentOptions]\n * @return {Segment[]}\n */\nfunction splitByStyles(line, segments, points, segmentOptions) {\n  if (!segmentOptions || !segmentOptions.setContext || !points) {\n    return segments;\n  }\n  return doSplitByStyles(line, segments, points, segmentOptions);\n}\n\n/**\n * @param {LineElement} line\n * @param {Segment[]} segments\n * @param {PointElement[]} points\n * @param {object} [segmentOptions]\n * @return {Segment[]}\n */\nfunction doSplitByStyles(line, segments, points, segmentOptions) {\n  const chartContext = line._chart.getContext();\n  const baseStyle = readStyle(line.options);\n  const {_datasetIndex: datasetIndex, options: {spanGaps}} = line;\n  const count = points.length;\n  const result = [];\n  let prevStyle = baseStyle;\n  let start = segments[0].start;\n  let i = start;\n\n  function addStyle(s, e, l, st) {\n    const dir = spanGaps ? -1 : 1;\n    if (s === e) {\n      return;\n    }\n    // Style can not start/end on a skipped point, adjust indices accordingly\n    s += count;\n    while (points[s % count].skip) {\n      s -= dir;\n    }\n    while (points[e % count].skip) {\n      e += dir;\n    }\n    if (s % count !== e % count) {\n      result.push({start: s % count, end: e % count, loop: l, style: st});\n      prevStyle = st;\n      start = e % count;\n    }\n  }\n\n  for (const segment of segments) {\n    start = spanGaps ? start : segment.start;\n    let prev = points[start % count];\n    let style;\n    for (i = start + 1; i <= segment.end; i++) {\n      const pt = points[i % count];\n      style = readStyle(segmentOptions.setContext(createContext(chartContext, {\n        type: 'segment',\n        p0: prev,\n        p1: pt,\n        p0DataIndex: (i - 1) % count,\n        p1DataIndex: i % count,\n        datasetIndex\n      })));\n      if (styleChanged(style, prevStyle)) {\n        addStyle(start, i - 1, segment.loop, prevStyle);\n      }\n      prev = pt;\n      prevStyle = style;\n    }\n    if (start < i - 1) {\n      addStyle(start, i - 1, segment.loop, prevStyle);\n    }\n  }\n\n  return result;\n}\n\nfunction readStyle(options) {\n  return {\n    backgroundColor: options.backgroundColor,\n    borderCapStyle: options.borderCapStyle,\n    borderDash: options.borderDash,\n    borderDashOffset: options.borderDashOffset,\n    borderJoinStyle: options.borderJoinStyle,\n    borderWidth: options.borderWidth,\n    borderColor: options.borderColor\n  };\n}\n\nfunction styleChanged(style, prevStyle) {\n  return prevStyle && JSON.stringify(style) !== JSON.stringify(prevStyle);\n}\n","import {_lookupByKey, _rlookupByKey} from '../helpers/helpers.collection';\nimport {getRelativePosition} from '../helpers/helpers.dom';\nimport {_angleBetween, getAngleFromPoint} from '../helpers/helpers.math';\nimport {_isPointInArea} from '../helpers';\n\n/**\n * @typedef { import(\"./core.controller\").default } Chart\n * @typedef { import(\"../../types\").ChartEvent } ChartEvent\n * @typedef {{axis?: string, intersect?: boolean, includeInvisible?: boolean}} InteractionOptions\n * @typedef {{datasetIndex: number, index: number, element: import(\"./core.element\").default}} InteractionItem\n * @typedef { import(\"../../types\").Point } Point\n */\n\n/**\n * Helper function to do binary search when possible\n * @param {object} metaset - the dataset meta\n * @param {string} axis - the axis mode. x|y|xy|r\n * @param {number} value - the value to find\n * @param {boolean} [intersect] - should the element intersect\n * @returns {{lo:number, hi:number}} indices to search data array between\n */\nfunction binarySearch(metaset, axis, value, intersect) {\n  const {controller, data, _sorted} = metaset;\n  const iScale = controller._cachedMeta.iScale;\n  if (iScale && axis === iScale.axis && axis !== 'r' && _sorted && data.length) {\n    const lookupMethod = iScale._reversePixels ? _rlookupByKey : _lookupByKey;\n    if (!intersect) {\n      return lookupMethod(data, axis, value);\n    } else if (controller._sharedOptions) {\n      // _sharedOptions indicates that each element has equal options -> equal proportions\n      // So we can do a ranged binary search based on the range of first element and\n      // be confident to get the full range of indices that can intersect with the value.\n      const el = data[0];\n      const range = typeof el.getRange === 'function' && el.getRange(axis);\n      if (range) {\n        const start = lookupMethod(data, axis, value - range);\n        const end = lookupMethod(data, axis, value + range);\n        return {lo: start.lo, hi: end.hi};\n      }\n    }\n  }\n  // Default to all elements, when binary search can not be used.\n  return {lo: 0, hi: data.length - 1};\n}\n\n/**\n * Helper function to select candidate elements for interaction\n * @param {Chart} chart - the chart\n * @param {string} axis - the axis mode. x|y|xy|r\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {function} handler - the callback to execute for each visible item\n * @param {boolean} [intersect] - consider intersecting items\n */\nfunction evaluateInteractionItems(chart, axis, position, handler, intersect) {\n  const metasets = chart.getSortedVisibleDatasetMetas();\n  const value = position[axis];\n  for (let i = 0, ilen = metasets.length; i < ilen; ++i) {\n    const {index, data} = metasets[i];\n    const {lo, hi} = binarySearch(metasets[i], axis, value, intersect);\n    for (let j = lo; j <= hi; ++j) {\n      const element = data[j];\n      if (!element.skip) {\n        handler(element, index, j);\n      }\n    }\n  }\n}\n\n/**\n * Get a distance metric function for two points based on the\n * axis mode setting\n * @param {string} axis - the axis mode. x|y|xy|r\n */\nfunction getDistanceMetricForAxis(axis) {\n  const useX = axis.indexOf('x') !== -1;\n  const useY = axis.indexOf('y') !== -1;\n\n  return function(pt1, pt2) {\n    const deltaX = useX ? Math.abs(pt1.x - pt2.x) : 0;\n    const deltaY = useY ? Math.abs(pt1.y - pt2.y) : 0;\n    return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));\n  };\n}\n\n/**\n * Helper function to get the items that intersect the event position\n * @param {Chart} chart - the chart\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axis mode. x|y|xy|r\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area\n * @return {InteractionItem[]} the nearest items\n */\nfunction getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) {\n  const items = [];\n\n  if (!includeInvisible && !chart.isPointInArea(position)) {\n    return items;\n  }\n\n  const evaluationFunc = function(element, datasetIndex, index) {\n    if (!includeInvisible && !_isPointInArea(element, chart.chartArea, 0)) {\n      return;\n    }\n    if (element.inRange(position.x, position.y, useFinalPosition)) {\n      items.push({element, datasetIndex, index});\n    }\n  };\n\n  evaluateInteractionItems(chart, axis, position, evaluationFunc, true);\n  return items;\n}\n\n/**\n * Helper function to get the items nearest to the event position for a radial chart\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axes along which to measure distance\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @return {InteractionItem[]} the nearest items\n */\nfunction getNearestRadialItems(chart, position, axis, useFinalPosition) {\n  let items = [];\n\n  function evaluationFunc(element, datasetIndex, index) {\n    const {startAngle, endAngle} = element.getProps(['startAngle', 'endAngle'], useFinalPosition);\n    const {angle} = getAngleFromPoint(element, {x: position.x, y: position.y});\n\n    if (_angleBetween(angle, startAngle, endAngle)) {\n      items.push({element, datasetIndex, index});\n    }\n  }\n\n  evaluateInteractionItems(chart, axis, position, evaluationFunc);\n  return items;\n}\n\n/**\n * Helper function to get the items nearest to the event position for a cartesian chart\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axes along which to measure distance\n * @param {boolean} [intersect] - if true, only consider items that intersect the position\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area\n * @return {InteractionItem[]} the nearest items\n */\nfunction getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {\n  let items = [];\n  const distanceMetric = getDistanceMetricForAxis(axis);\n  let minDistance = Number.POSITIVE_INFINITY;\n\n  function evaluationFunc(element, datasetIndex, index) {\n    const inRange = element.inRange(position.x, position.y, useFinalPosition);\n    if (intersect && !inRange) {\n      return;\n    }\n\n    const center = element.getCenterPoint(useFinalPosition);\n    const pointInArea = !!includeInvisible || chart.isPointInArea(center);\n    if (!pointInArea && !inRange) {\n      return;\n    }\n\n    const distance = distanceMetric(position, center);\n    if (distance < minDistance) {\n      items = [{element, datasetIndex, index}];\n      minDistance = distance;\n    } else if (distance === minDistance) {\n      // Can have multiple items at the same distance in which case we sort by size\n      items.push({element, datasetIndex, index});\n    }\n  }\n\n  evaluateInteractionItems(chart, axis, position, evaluationFunc);\n  return items;\n}\n\n/**\n * Helper function to get the items nearest to the event position considering all visible items in the chart\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axes along which to measure distance\n * @param {boolean} [intersect] - if true, only consider items that intersect the position\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @param {boolean} [includeInvisible] - include invisible points that are outside of the chart area\n * @return {InteractionItem[]} the nearest items\n */\nfunction getNearestItems(chart, position, axis, intersect, useFinalPosition, includeInvisible) {\n  if (!includeInvisible && !chart.isPointInArea(position)) {\n    return [];\n  }\n\n  return axis === 'r' && !intersect\n    ? getNearestRadialItems(chart, position, axis, useFinalPosition)\n    : getNearestCartesianItems(chart, position, axis, intersect, useFinalPosition, includeInvisible);\n}\n\n/**\n * Helper function to get the items matching along the given X or Y axis\n * @param {Chart} chart - the chart to look at elements from\n * @param {Point} position - the point to be nearest to, in relative coordinates\n * @param {string} axis - the axis to match\n * @param {boolean} [intersect] - if true, only consider items that intersect the position\n * @param {boolean} [useFinalPosition] - use the element's animation target instead of current position\n * @return {InteractionItem[]} the nearest items\n */\nfunction getAxisItems(chart, position, axis, intersect, useFinalPosition) {\n  const items = [];\n  const rangeMethod = axis === 'x' ? 'inXRange' : 'inYRange';\n  let intersectsItem = false;\n\n  evaluateInteractionItems(chart, axis, position, (element, datasetIndex, index) => {\n    if (element[rangeMethod](position[axis], useFinalPosition)) {\n      items.push({element, datasetIndex, index});\n      intersectsItem = intersectsItem || element.inRange(position.x, position.y, useFinalPosition);\n    }\n  });\n\n  // If we want to trigger on an intersect and we don't have any items\n  // that intersect the position, return nothing\n  if (intersect && !intersectsItem) {\n    return [];\n  }\n  return items;\n}\n\n/**\n * Contains interaction related functions\n * @namespace Chart.Interaction\n */\nexport default {\n  // Part of the public API to facilitate developers creating their own modes\n  evaluateInteractionItems,\n\n  // Helper function for different modes\n  modes: {\n    /**\n\t\t * Returns items at the same index. If the options.intersect parameter is true, we only return items if we intersect something\n\t\t * If the options.intersect mode is false, we find the nearest item and return the items at the same index as that item\n\t\t * @function Chart.Interaction.modes.index\n\t\t * @since v2.4.0\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n    index(chart, e, options, useFinalPosition) {\n      const position = getRelativePosition(e, chart);\n      // Default axis for index mode is 'x' to match old behaviour\n      const axis = options.axis || 'x';\n      const includeInvisible = options.includeInvisible || false;\n      const items = options.intersect\n        ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible)\n        : getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);\n      const elements = [];\n\n      if (!items.length) {\n        return [];\n      }\n\n      chart.getSortedVisibleDatasetMetas().forEach((meta) => {\n        const index = items[0].index;\n        const element = meta.data[index];\n\n        // don't count items that are skipped (null data)\n        if (element && !element.skip) {\n          elements.push({element, datasetIndex: meta.index, index});\n        }\n      });\n\n      return elements;\n    },\n\n    /**\n\t\t * Returns items in the same dataset. If the options.intersect parameter is true, we only return items if we intersect something\n\t\t * If the options.intersect is false, we find the nearest item and return the items in that dataset\n\t\t * @function Chart.Interaction.modes.dataset\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n    dataset(chart, e, options, useFinalPosition) {\n      const position = getRelativePosition(e, chart);\n      const axis = options.axis || 'xy';\n      const includeInvisible = options.includeInvisible || false;\n      let items = options.intersect\n        ? getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible) :\n        getNearestItems(chart, position, axis, false, useFinalPosition, includeInvisible);\n\n      if (items.length > 0) {\n        const datasetIndex = items[0].datasetIndex;\n        const data = chart.getDatasetMeta(datasetIndex).data;\n        items = [];\n        for (let i = 0; i < data.length; ++i) {\n          items.push({element: data[i], datasetIndex, index: i});\n        }\n      }\n\n      return items;\n    },\n\n    /**\n\t\t * Point mode returns all elements that hit test based on the event position\n\t\t * of the event\n\t\t * @function Chart.Interaction.modes.intersect\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n    point(chart, e, options, useFinalPosition) {\n      const position = getRelativePosition(e, chart);\n      const axis = options.axis || 'xy';\n      const includeInvisible = options.includeInvisible || false;\n      return getIntersectItems(chart, position, axis, useFinalPosition, includeInvisible);\n    },\n\n    /**\n\t\t * nearest mode returns the element closest to the point\n\t\t * @function Chart.Interaction.modes.intersect\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n    nearest(chart, e, options, useFinalPosition) {\n      const position = getRelativePosition(e, chart);\n      const axis = options.axis || 'xy';\n      const includeInvisible = options.includeInvisible || false;\n      return getNearestItems(chart, position, axis, options.intersect, useFinalPosition, includeInvisible);\n    },\n\n    /**\n\t\t * x mode returns the elements that hit-test at the current x coordinate\n\t\t * @function Chart.Interaction.modes.x\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n    x(chart, e, options, useFinalPosition) {\n      const position = getRelativePosition(e, chart);\n      return getAxisItems(chart, position, 'x', options.intersect, useFinalPosition);\n    },\n\n    /**\n\t\t * y mode returns the elements that hit-test at the current y coordinate\n\t\t * @function Chart.Interaction.modes.y\n\t\t * @param {Chart} chart - the chart we are returning items from\n\t\t * @param {Event} e - the event we are find things at\n\t\t * @param {InteractionOptions} options - options to use\n\t\t * @param {boolean} [useFinalPosition] - use final element position (animation target)\n\t\t * @return {InteractionItem[]} - items that are found\n\t\t */\n    y(chart, e, options, useFinalPosition) {\n      const position = getRelativePosition(e, chart);\n      return getAxisItems(chart, position, 'y', options.intersect, useFinalPosition);\n    }\n  }\n};\n","import {defined, each, isObject} from '../helpers/helpers.core';\nimport {toPadding} from '../helpers/helpers.options';\n\n/**\n * @typedef { import(\"./core.controller\").default } Chart\n */\n\nconst STATIC_POSITIONS = ['left', 'top', 'right', 'bottom'];\n\nfunction filterByPosition(array, position) {\n  return array.filter(v => v.pos === position);\n}\n\nfunction filterDynamicPositionByAxis(array, axis) {\n  return array.filter(v => STATIC_POSITIONS.indexOf(v.pos) === -1 && v.box.axis === axis);\n}\n\nfunction sortByWeight(array, reverse) {\n  return array.sort((a, b) => {\n    const v0 = reverse ? b : a;\n    const v1 = reverse ? a : b;\n    return v0.weight === v1.weight ?\n      v0.index - v1.index :\n      v0.weight - v1.weight;\n  });\n}\n\nfunction wrapBoxes(boxes) {\n  const layoutBoxes = [];\n  let i, ilen, box, pos, stack, stackWeight;\n\n  for (i = 0, ilen = (boxes || []).length; i < ilen; ++i) {\n    box = boxes[i];\n    ({position: pos, options: {stack, stackWeight = 1}} = box);\n    layoutBoxes.push({\n      index: i,\n      box,\n      pos,\n      horizontal: box.isHorizontal(),\n      weight: box.weight,\n      stack: stack && (pos + stack),\n      stackWeight\n    });\n  }\n  return layoutBoxes;\n}\n\nfunction buildStacks(layouts) {\n  const stacks = {};\n  for (const wrap of layouts) {\n    const {stack, pos, stackWeight} = wrap;\n    if (!stack || !STATIC_POSITIONS.includes(pos)) {\n      continue;\n    }\n    const _stack = stacks[stack] || (stacks[stack] = {count: 0, placed: 0, weight: 0, size: 0});\n    _stack.count++;\n    _stack.weight += stackWeight;\n  }\n  return stacks;\n}\n\n/**\n * store dimensions used instead of available chartArea in fitBoxes\n **/\nfunction setLayoutDims(layouts, params) {\n  const stacks = buildStacks(layouts);\n  const {vBoxMaxWidth, hBoxMaxHeight} = params;\n  let i, ilen, layout;\n  for (i = 0, ilen = layouts.length; i < ilen; ++i) {\n    layout = layouts[i];\n    const {fullSize} = layout.box;\n    const stack = stacks[layout.stack];\n    const factor = stack && layout.stackWeight / stack.weight;\n    if (layout.horizontal) {\n      layout.width = factor ? factor * vBoxMaxWidth : fullSize && params.availableWidth;\n      layout.height = hBoxMaxHeight;\n    } else {\n      layout.width = vBoxMaxWidth;\n      layout.height = factor ? factor * hBoxMaxHeight : fullSize && params.availableHeight;\n    }\n  }\n  return stacks;\n}\n\nfunction buildLayoutBoxes(boxes) {\n  const layoutBoxes = wrapBoxes(boxes);\n  const fullSize = sortByWeight(layoutBoxes.filter(wrap => wrap.box.fullSize), true);\n  const left = sortByWeight(filterByPosition(layoutBoxes, 'left'), true);\n  const right = sortByWeight(filterByPosition(layoutBoxes, 'right'));\n  const top = sortByWeight(filterByPosition(layoutBoxes, 'top'), true);\n  const bottom = sortByWeight(filterByPosition(layoutBoxes, 'bottom'));\n  const centerHorizontal = filterDynamicPositionByAxis(layoutBoxes, 'x');\n  const centerVertical = filterDynamicPositionByAxis(layoutBoxes, 'y');\n\n  return {\n    fullSize,\n    leftAndTop: left.concat(top),\n    rightAndBottom: right.concat(centerVertical).concat(bottom).concat(centerHorizontal),\n    chartArea: filterByPosition(layoutBoxes, 'chartArea'),\n    vertical: left.concat(right).concat(centerVertical),\n    horizontal: top.concat(bottom).concat(centerHorizontal)\n  };\n}\n\nfunction getCombinedMax(maxPadding, chartArea, a, b) {\n  return Math.max(maxPadding[a], chartArea[a]) + Math.max(maxPadding[b], chartArea[b]);\n}\n\nfunction updateMaxPadding(maxPadding, boxPadding) {\n  maxPadding.top = Math.max(maxPadding.top, boxPadding.top);\n  maxPadding.left = Math.max(maxPadding.left, boxPadding.left);\n  maxPadding.bottom = Math.max(maxPadding.bottom, boxPadding.bottom);\n  maxPadding.right = Math.max(maxPadding.right, boxPadding.right);\n}\n\nfunction updateDims(chartArea, params, layout, stacks) {\n  const {pos, box} = layout;\n  const maxPadding = chartArea.maxPadding;\n\n  // dynamically placed boxes size is not considered\n  if (!isObject(pos)) {\n    if (layout.size) {\n      // this layout was already counted for, lets first reduce old size\n      chartArea[pos] -= layout.size;\n    }\n    const stack = stacks[layout.stack] || {size: 0, count: 1};\n    stack.size = Math.max(stack.size, layout.horizontal ? box.height : box.width);\n    layout.size = stack.size / stack.count;\n    chartArea[pos] += layout.size;\n  }\n\n  if (box.getPadding) {\n    updateMaxPadding(maxPadding, box.getPadding());\n  }\n\n  const newWidth = Math.max(0, params.outerWidth - getCombinedMax(maxPadding, chartArea, 'left', 'right'));\n  const newHeight = Math.max(0, params.outerHeight - getCombinedMax(maxPadding, chartArea, 'top', 'bottom'));\n  const widthChanged = newWidth !== chartArea.w;\n  const heightChanged = newHeight !== chartArea.h;\n  chartArea.w = newWidth;\n  chartArea.h = newHeight;\n\n  // return booleans on the changes per direction\n  return layout.horizontal\n    ? {same: widthChanged, other: heightChanged}\n    : {same: heightChanged, other: widthChanged};\n}\n\nfunction handleMaxPadding(chartArea) {\n  const maxPadding = chartArea.maxPadding;\n\n  function updatePos(pos) {\n    const change = Math.max(maxPadding[pos] - chartArea[pos], 0);\n    chartArea[pos] += change;\n    return change;\n  }\n  chartArea.y += updatePos('top');\n  chartArea.x += updatePos('left');\n  updatePos('right');\n  updatePos('bottom');\n}\n\nfunction getMargins(horizontal, chartArea) {\n  const maxPadding = chartArea.maxPadding;\n\n  function marginForPositions(positions) {\n    const margin = {left: 0, top: 0, right: 0, bottom: 0};\n    positions.forEach((pos) => {\n      margin[pos] = Math.max(chartArea[pos], maxPadding[pos]);\n    });\n    return margin;\n  }\n\n  return horizontal\n    ? marginForPositions(['left', 'right'])\n    : marginForPositions(['top', 'bottom']);\n}\n\nfunction fitBoxes(boxes, chartArea, params, stacks) {\n  const refitBoxes = [];\n  let i, ilen, layout, box, refit, changed;\n\n  for (i = 0, ilen = boxes.length, refit = 0; i < ilen; ++i) {\n    layout = boxes[i];\n    box = layout.box;\n\n    box.update(\n      layout.width || chartArea.w,\n      layout.height || chartArea.h,\n      getMargins(layout.horizontal, chartArea)\n    );\n    const {same, other} = updateDims(chartArea, params, layout, stacks);\n\n    // Dimensions changed and there were non full width boxes before this\n    // -> we have to refit those\n    refit |= same && refitBoxes.length;\n\n    // Chart area changed in the opposite direction\n    changed = changed || other;\n\n    if (!box.fullSize) { // fullSize boxes don't need to be re-fitted in any case\n      refitBoxes.push(layout);\n    }\n  }\n\n  return refit && fitBoxes(refitBoxes, chartArea, params, stacks) || changed;\n}\n\nfunction setBoxDims(box, left, top, width, height) {\n  box.top = top;\n  box.left = left;\n  box.right = left + width;\n  box.bottom = top + height;\n  box.width = width;\n  box.height = height;\n}\n\nfunction placeBoxes(boxes, chartArea, params, stacks) {\n  const userPadding = params.padding;\n  let {x, y} = chartArea;\n\n  for (const layout of boxes) {\n    const box = layout.box;\n    const stack = stacks[layout.stack] || {count: 1, placed: 0, weight: 1};\n    const weight = (layout.stackWeight / stack.weight) || 1;\n    if (layout.horizontal) {\n      const width = chartArea.w * weight;\n      const height = stack.size || box.height;\n      if (defined(stack.start)) {\n        y = stack.start;\n      }\n      if (box.fullSize) {\n        setBoxDims(box, userPadding.left, y, params.outerWidth - userPadding.right - userPadding.left, height);\n      } else {\n        setBoxDims(box, chartArea.left + stack.placed, y, width, height);\n      }\n      stack.start = y;\n      stack.placed += width;\n      y = box.bottom;\n    } else {\n      const height = chartArea.h * weight;\n      const width = stack.size || box.width;\n      if (defined(stack.start)) {\n        x = stack.start;\n      }\n      if (box.fullSize) {\n        setBoxDims(box, x, userPadding.top, width, params.outerHeight - userPadding.bottom - userPadding.top);\n      } else {\n        setBoxDims(box, x, chartArea.top + stack.placed, width, height);\n      }\n      stack.start = x;\n      stack.placed += height;\n      x = box.right;\n    }\n  }\n\n  chartArea.x = x;\n  chartArea.y = y;\n}\n\n/**\n * @interface LayoutItem\n * @typedef {object} LayoutItem\n * @prop {string} position - The position of the item in the chart layout. Possible values are\n * 'left', 'top', 'right', 'bottom', and 'chartArea'\n * @prop {number} weight - The weight used to sort the item. Higher weights are further away from the chart area\n * @prop {boolean} fullSize - if true, and the item is horizontal, then push vertical boxes down\n * @prop {function} isHorizontal - returns true if the layout item is horizontal (ie. top or bottom)\n * @prop {function} update - Takes two parameters: width and height. Returns size of item\n * @prop {function} draw - Draws the element\n * @prop {function} [getPadding] -  Returns an object with padding on the edges\n * @prop {number} width - Width of item. Must be valid after update()\n * @prop {number} height - Height of item. Must be valid after update()\n * @prop {number} left - Left edge of the item. Set by layout system and cannot be used in update\n * @prop {number} top - Top edge of the item. Set by layout system and cannot be used in update\n * @prop {number} right - Right edge of the item. Set by layout system and cannot be used in update\n * @prop {number} bottom - Bottom edge of the item. Set by layout system and cannot be used in update\n */\n\n// The layout service is very self explanatory.  It's responsible for the layout within a chart.\n// Scales, Legends and Plugins all rely on the layout service and can easily register to be placed anywhere they need\n// It is this service's responsibility of carrying out that layout.\nexport default {\n\n  /**\n\t * Register a box to a chart.\n\t * A box is simply a reference to an object that requires layout. eg. Scales, Legend, Title.\n\t * @param {Chart} chart - the chart to use\n\t * @param {LayoutItem} item - the item to add to be laid out\n\t */\n  addBox(chart, item) {\n    if (!chart.boxes) {\n      chart.boxes = [];\n    }\n\n    // initialize item with default values\n    item.fullSize = item.fullSize || false;\n    item.position = item.position || 'top';\n    item.weight = item.weight || 0;\n    // @ts-ignore\n    item._layers = item._layers || function() {\n      return [{\n        z: 0,\n        draw(chartArea) {\n          item.draw(chartArea);\n        }\n      }];\n    };\n\n    chart.boxes.push(item);\n  },\n\n  /**\n\t * Remove a layoutItem from a chart\n\t * @param {Chart} chart - the chart to remove the box from\n\t * @param {LayoutItem} layoutItem - the item to remove from the layout\n\t */\n  removeBox(chart, layoutItem) {\n    const index = chart.boxes ? chart.boxes.indexOf(layoutItem) : -1;\n    if (index !== -1) {\n      chart.boxes.splice(index, 1);\n    }\n  },\n\n  /**\n\t * Sets (or updates) options on the given `item`.\n\t * @param {Chart} chart - the chart in which the item lives (or will be added to)\n\t * @param {LayoutItem} item - the item to configure with the given options\n\t * @param {object} options - the new item options.\n\t */\n  configure(chart, item, options) {\n    item.fullSize = options.fullSize;\n    item.position = options.position;\n    item.weight = options.weight;\n  },\n\n  /**\n\t * Fits boxes of the given chart into the given size by having each box measure itself\n\t * then running a fitting algorithm\n\t * @param {Chart} chart - the chart\n\t * @param {number} width - the width to fit into\n\t * @param {number} height - the height to fit into\n   * @param {number} minPadding - minimum padding required for each side of chart area\n\t */\n  update(chart, width, height, minPadding) {\n    if (!chart) {\n      return;\n    }\n\n    const padding = toPadding(chart.options.layout.padding);\n    const availableWidth = Math.max(width - padding.width, 0);\n    const availableHeight = Math.max(height - padding.height, 0);\n    const boxes = buildLayoutBoxes(chart.boxes);\n    const verticalBoxes = boxes.vertical;\n    const horizontalBoxes = boxes.horizontal;\n\n    // Before any changes are made, notify boxes that an update is about to being\n    // This is used to clear any cached data (e.g. scale limits)\n    each(chart.boxes, box => {\n      if (typeof box.beforeLayout === 'function') {\n        box.beforeLayout();\n      }\n    });\n\n    // Essentially we now have any number of boxes on each of the 4 sides.\n    // Our canvas looks like the following.\n    // The areas L1 and L2 are the left axes. R1 is the right axis, T1 is the top axis and\n    // B1 is the bottom axis\n    // There are also 4 quadrant-like locations (left to right instead of clockwise) reserved for chart overlays\n    // These locations are single-box locations only, when trying to register a chartArea location that is already taken,\n    // an error will be thrown.\n    //\n    // |----------------------------------------------------|\n    // |                  T1 (Full Width)                   |\n    // |----------------------------------------------------|\n    // |    |    |                 T2                  |    |\n    // |    |----|-------------------------------------|----|\n    // |    |    | C1 |                           | C2 |    |\n    // |    |    |----|                           |----|    |\n    // |    |    |                                     |    |\n    // | L1 | L2 |           ChartArea (C0)            | R1 |\n    // |    |    |                                     |    |\n    // |    |    |----|                           |----|    |\n    // |    |    | C3 |                           | C4 |    |\n    // |    |----|-------------------------------------|----|\n    // |    |    |                 B1                  |    |\n    // |----------------------------------------------------|\n    // |                  B2 (Full Width)                   |\n    // |----------------------------------------------------|\n    //\n\n    const visibleVerticalBoxCount = verticalBoxes.reduce((total, wrap) =>\n      wrap.box.options && wrap.box.options.display === false ? total : total + 1, 0) || 1;\n\n    const params = Object.freeze({\n      outerWidth: width,\n      outerHeight: height,\n      padding,\n      availableWidth,\n      availableHeight,\n      vBoxMaxWidth: availableWidth / 2 / visibleVerticalBoxCount,\n      hBoxMaxHeight: availableHeight / 2\n    });\n    const maxPadding = Object.assign({}, padding);\n    updateMaxPadding(maxPadding, toPadding(minPadding));\n    const chartArea = Object.assign({\n      maxPadding,\n      w: availableWidth,\n      h: availableHeight,\n      x: padding.left,\n      y: padding.top\n    }, padding);\n\n    const stacks = setLayoutDims(verticalBoxes.concat(horizontalBoxes), params);\n\n    // First fit the fullSize boxes, to reduce probability of re-fitting.\n    fitBoxes(boxes.fullSize, chartArea, params, stacks);\n\n    // Then fit vertical boxes\n    fitBoxes(verticalBoxes, chartArea, params, stacks);\n\n    // Then fit horizontal boxes\n    if (fitBoxes(horizontalBoxes, chartArea, params, stacks)) {\n      // if the area changed, re-fit vertical boxes\n      fitBoxes(verticalBoxes, chartArea, params, stacks);\n    }\n\n    handleMaxPadding(chartArea);\n\n    // Finally place the boxes to correct coordinates\n    placeBoxes(boxes.leftAndTop, chartArea, params, stacks);\n\n    // Move to opposite side of chart\n    chartArea.x += chartArea.w;\n    chartArea.y += chartArea.h;\n\n    placeBoxes(boxes.rightAndBottom, chartArea, params, stacks);\n\n    chart.chartArea = {\n      left: chartArea.left,\n      top: chartArea.top,\n      right: chartArea.left + chartArea.w,\n      bottom: chartArea.top + chartArea.h,\n      height: chartArea.h,\n      width: chartArea.w,\n    };\n\n    // Finally update boxes in chartArea (radial scale for example)\n    each(boxes.chartArea, (layout) => {\n      const box = layout.box;\n      Object.assign(box, chart.chartArea);\n      box.update(chartArea.w, chartArea.h, {left: 0, top: 0, right: 0, bottom: 0});\n    });\n  }\n};\n","\n/**\n * @typedef { import(\"../core/core.controller\").default } Chart\n */\n\n/**\n * Abstract class that allows abstracting platform dependencies away from the chart.\n */\nexport default class BasePlatform {\n  /**\n\t * Called at chart construction time, returns a context2d instance implementing\n\t * the [W3C Canvas 2D Context API standard]{@link https://www.w3.org/TR/2dcontext/}.\n\t * @param {HTMLCanvasElement} canvas - The canvas from which to acquire context (platform specific)\n\t * @param {number} [aspectRatio] - The chart options\n\t */\n  acquireContext(canvas, aspectRatio) {} // eslint-disable-line no-unused-vars\n\n  /**\n\t * Called at chart destruction time, releases any resources associated to the context\n\t * previously returned by the acquireContext() method.\n\t * @param {CanvasRenderingContext2D} context - The context2d instance\n\t * @returns {boolean} true if the method succeeded, else false\n\t */\n  releaseContext(context) { // eslint-disable-line no-unused-vars\n    return false;\n  }\n\n  /**\n\t * Registers the specified listener on the given chart.\n\t * @param {Chart} chart - Chart from which to listen for event\n\t * @param {string} type - The ({@link ChartEvent}) type to listen for\n\t * @param {function} listener - Receives a notification (an object that implements\n\t * the {@link ChartEvent} interface) when an event of the specified type occurs.\n\t */\n  addEventListener(chart, type, listener) {} // eslint-disable-line no-unused-vars\n\n  /**\n\t * Removes the specified listener previously registered with addEventListener.\n\t * @param {Chart} chart - Chart from which to remove the listener\n\t * @param {string} type - The ({@link ChartEvent}) type to remove\n\t * @param {function} listener - The listener function to remove from the event target.\n\t */\n  removeEventListener(chart, type, listener) {} // eslint-disable-line no-unused-vars\n\n  /**\n\t * @returns {number} the current devicePixelRatio of the device this platform is connected to.\n\t */\n  getDevicePixelRatio() {\n    return 1;\n  }\n\n  /**\n\t * Returns the maximum size in pixels of given canvas element.\n\t * @param {HTMLCanvasElement} element\n\t * @param {number} [width] - content width of parent element\n\t * @param {number} [height] - content height of parent element\n\t * @param {number} [aspectRatio] - aspect ratio to maintain\n\t */\n  getMaximumSize(element, width, height, aspectRatio) {\n    width = Math.max(0, width || element.width);\n    height = height || element.height;\n    return {\n      width,\n      height: Math.max(0, aspectRatio ? Math.floor(width / aspectRatio) : height)\n    };\n  }\n\n  /**\n\t * @param {HTMLCanvasElement} canvas\n\t * @returns {boolean} true if the canvas is attached to the platform, false if not.\n\t */\n  isAttached(canvas) { // eslint-disable-line no-unused-vars\n    return true;\n  }\n\n  /**\n   * Updates config with platform specific requirements\n   * @param {import(\"../core/core.config\").default} config\n   */\n  updateConfig(config) { // eslint-disable-line no-unused-vars\n    // no-op\n  }\n}\n","/**\n * Platform fallback implementation (minimal).\n * @see https://github.com/chartjs/Chart.js/pull/4591#issuecomment-319575939\n */\n\nimport BasePlatform from './platform.base';\n\n/**\n * Platform class for charts without access to the DOM or to many element properties\n * This platform is used by default for any chart passed an OffscreenCanvas.\n * @extends BasePlatform\n */\nexport default class BasicPlatform extends BasePlatform {\n  acquireContext(item) {\n    // To prevent canvas fingerprinting, some add-ons undefine the getContext\n    // method, for example: https://github.com/kkapsner/CanvasBlocker\n    // https://github.com/chartjs/Chart.js/issues/2807\n    return item && item.getContext && item.getContext('2d') || null;\n  }\n  updateConfig(config) {\n    config.options.animation = false;\n  }\n}\n","/**\n * Chart.Platform implementation for targeting a web browser\n */\n\nimport BasePlatform from './platform.base';\nimport {_getParentNode, getRelativePosition, supportsEventListenerOptions, readUsedSize, getMaximumSize} from '../helpers/helpers.dom';\nimport {throttled} from '../helpers/helpers.extras';\nimport {isNullOrUndef} from '../helpers/helpers.core';\n\n/**\n * @typedef { import(\"../core/core.controller\").default } Chart\n */\n\nconst EXPANDO_KEY = '$chartjs';\n\n/**\n * DOM event types -> Chart.js event types.\n * Note: only events with different types are mapped.\n * @see https://developer.mozilla.org/en-US/docs/Web/Events\n */\nconst EVENT_TYPES = {\n  touchstart: 'mousedown',\n  touchmove: 'mousemove',\n  touchend: 'mouseup',\n  pointerenter: 'mouseenter',\n  pointerdown: 'mousedown',\n  pointermove: 'mousemove',\n  pointerup: 'mouseup',\n  pointerleave: 'mouseout',\n  pointerout: 'mouseout'\n};\n\nconst isNullOrEmpty = value => value === null || value === '';\n/**\n * Initializes the canvas style and render size without modifying the canvas display size,\n * since responsiveness is handled by the controller.resize() method. The config is used\n * to determine the aspect ratio to apply in case no explicit height has been specified.\n * @param {HTMLCanvasElement} canvas\n * @param {number} [aspectRatio]\n */\nfunction initCanvas(canvas, aspectRatio) {\n  const style = canvas.style;\n\n  // NOTE(SB) canvas.getAttribute('width') !== canvas.width: in the first case it\n  // returns null or '' if no explicit value has been set to the canvas attribute.\n  const renderHeight = canvas.getAttribute('height');\n  const renderWidth = canvas.getAttribute('width');\n\n  // Chart.js modifies some canvas values that we want to restore on destroy\n  canvas[EXPANDO_KEY] = {\n    initial: {\n      height: renderHeight,\n      width: renderWidth,\n      style: {\n        display: style.display,\n        height: style.height,\n        width: style.width\n      }\n    }\n  };\n\n  // Force canvas to display as block to avoid extra space caused by inline\n  // elements, which would interfere with the responsive resize process.\n  // https://github.com/chartjs/Chart.js/issues/2538\n  style.display = style.display || 'block';\n  // Include possible borders in the size\n  style.boxSizing = style.boxSizing || 'border-box';\n\n  if (isNullOrEmpty(renderWidth)) {\n    const displayWidth = readUsedSize(canvas, 'width');\n    if (displayWidth !== undefined) {\n      canvas.width = displayWidth;\n    }\n  }\n\n  if (isNullOrEmpty(renderHeight)) {\n    if (canvas.style.height === '') {\n      // If no explicit render height and style height, let's apply the aspect ratio,\n      // which one can be specified by the user but also by charts as default option\n      // (i.e. options.aspectRatio). If not specified, use canvas aspect ratio of 2.\n      canvas.height = canvas.width / (aspectRatio || 2);\n    } else {\n      const displayHeight = readUsedSize(canvas, 'height');\n      if (displayHeight !== undefined) {\n        canvas.height = displayHeight;\n      }\n    }\n  }\n\n  return canvas;\n}\n\n// Default passive to true as expected by Chrome for 'touchstart' and 'touchend' events.\n// https://github.com/chartjs/Chart.js/issues/4287\nconst eventListenerOptions = supportsEventListenerOptions ? {passive: true} : false;\n\nfunction addListener(node, type, listener) {\n  node.addEventListener(type, listener, eventListenerOptions);\n}\n\nfunction removeListener(chart, type, listener) {\n  chart.canvas.removeEventListener(type, listener, eventListenerOptions);\n}\n\nfunction fromNativeEvent(event, chart) {\n  const type = EVENT_TYPES[event.type] || event.type;\n  const {x, y} = getRelativePosition(event, chart);\n  return {\n    type,\n    chart,\n    native: event,\n    x: x !== undefined ? x : null,\n    y: y !== undefined ? y : null,\n  };\n}\n\nfunction nodeListContains(nodeList, canvas) {\n  for (const node of nodeList) {\n    if (node === canvas || node.contains(canvas)) {\n      return true;\n    }\n  }\n}\n\nfunction createAttachObserver(chart, type, listener) {\n  const canvas = chart.canvas;\n  const observer = new MutationObserver(entries => {\n    let trigger = false;\n    for (const entry of entries) {\n      trigger = trigger || nodeListContains(entry.addedNodes, canvas);\n      trigger = trigger && !nodeListContains(entry.removedNodes, canvas);\n    }\n    if (trigger) {\n      listener();\n    }\n  });\n  observer.observe(document, {childList: true, subtree: true});\n  return observer;\n}\n\nfunction createDetachObserver(chart, type, listener) {\n  const canvas = chart.canvas;\n  const observer = new MutationObserver(entries => {\n    let trigger = false;\n    for (const entry of entries) {\n      trigger = trigger || nodeListContains(entry.removedNodes, canvas);\n      trigger = trigger && !nodeListContains(entry.addedNodes, canvas);\n    }\n    if (trigger) {\n      listener();\n    }\n  });\n  observer.observe(document, {childList: true, subtree: true});\n  return observer;\n}\n\nconst drpListeningCharts = new Map();\nlet oldDevicePixelRatio = 0;\n\nfunction onWindowResize() {\n  const dpr = window.devicePixelRatio;\n  if (dpr === oldDevicePixelRatio) {\n    return;\n  }\n  oldDevicePixelRatio = dpr;\n  drpListeningCharts.forEach((resize, chart) => {\n    if (chart.currentDevicePixelRatio !== dpr) {\n      resize();\n    }\n  });\n}\n\nfunction listenDevicePixelRatioChanges(chart, resize) {\n  if (!drpListeningCharts.size) {\n    window.addEventListener('resize', onWindowResize);\n  }\n  drpListeningCharts.set(chart, resize);\n}\n\nfunction unlistenDevicePixelRatioChanges(chart) {\n  drpListeningCharts.delete(chart);\n  if (!drpListeningCharts.size) {\n    window.removeEventListener('resize', onWindowResize);\n  }\n}\n\nfunction createResizeObserver(chart, type, listener) {\n  const canvas = chart.canvas;\n  const container = canvas && _getParentNode(canvas);\n  if (!container) {\n    return;\n  }\n  const resize = throttled((width, height) => {\n    const w = container.clientWidth;\n    listener(width, height);\n    if (w < container.clientWidth) {\n      // If the container size shrank during chart resize, let's assume\n      // scrollbar appeared. So we resize again with the scrollbar visible -\n      // effectively making chart smaller and the scrollbar hidden again.\n      // Because we are inside `throttled`, and currently `ticking`, scroll\n      // events are ignored during this whole 2 resize process.\n      // If we assumed wrong and something else happened, we are resizing\n      // twice in a frame (potential performance issue)\n      listener();\n    }\n  }, window);\n\n  // @ts-ignore until https://github.com/microsoft/TypeScript/issues/37861 implemented\n  const observer = new ResizeObserver(entries => {\n    const entry = entries[0];\n    const width = entry.contentRect.width;\n    const height = entry.contentRect.height;\n    // When its container's display is set to 'none' the callback will be called with a\n    // size of (0, 0), which will cause the chart to lose its original height, so skip\n    // resizing in such case.\n    if (width === 0 && height === 0) {\n      return;\n    }\n    resize(width, height);\n  });\n  observer.observe(container);\n  listenDevicePixelRatioChanges(chart, resize);\n\n  return observer;\n}\n\nfunction releaseObserver(chart, type, observer) {\n  if (observer) {\n    observer.disconnect();\n  }\n  if (type === 'resize') {\n    unlistenDevicePixelRatioChanges(chart);\n  }\n}\n\nfunction createProxyAndListen(chart, type, listener) {\n  const canvas = chart.canvas;\n  const proxy = throttled((event) => {\n    // This case can occur if the chart is destroyed while waiting\n    // for the throttled function to occur. We prevent crashes by checking\n    // for a destroyed chart\n    if (chart.ctx !== null) {\n      listener(fromNativeEvent(event, chart));\n    }\n  }, chart);\n\n  addListener(canvas, type, proxy);\n\n  return proxy;\n}\n\n/**\n * Platform class for charts that can access the DOM and global window/document properties\n * @extends BasePlatform\n */\nexport default class DomPlatform extends BasePlatform {\n\n  /**\n\t * @param {HTMLCanvasElement} canvas\n\t * @param {number} [aspectRatio]\n\t * @return {CanvasRenderingContext2D|null}\n\t */\n  acquireContext(canvas, aspectRatio) {\n    // To prevent canvas fingerprinting, some add-ons undefine the getContext\n    // method, for example: https://github.com/kkapsner/CanvasBlocker\n    // https://github.com/chartjs/Chart.js/issues/2807\n    const context = canvas && canvas.getContext && canvas.getContext('2d');\n\n    // `instanceof HTMLCanvasElement/CanvasRenderingContext2D` fails when the canvas is\n    // inside an iframe or when running in a protected environment. We could guess the\n    // types from their toString() value but let's keep things flexible and assume it's\n    // a sufficient condition if the canvas has a context2D which has canvas as `canvas`.\n    // https://github.com/chartjs/Chart.js/issues/3887\n    // https://github.com/chartjs/Chart.js/issues/4102\n    // https://github.com/chartjs/Chart.js/issues/4152\n    if (context && context.canvas === canvas) {\n      // Load platform resources on first chart creation, to make it possible to\n      // import the library before setting platform options.\n      initCanvas(canvas, aspectRatio);\n      return context;\n    }\n\n    return null;\n  }\n\n  /**\n\t * @param {CanvasRenderingContext2D} context\n\t */\n  releaseContext(context) {\n    const canvas = context.canvas;\n    if (!canvas[EXPANDO_KEY]) {\n      return false;\n    }\n\n    const initial = canvas[EXPANDO_KEY].initial;\n    ['height', 'width'].forEach((prop) => {\n      const value = initial[prop];\n      if (isNullOrUndef(value)) {\n        canvas.removeAttribute(prop);\n      } else {\n        canvas.setAttribute(prop, value);\n      }\n    });\n\n    const style = initial.style || {};\n    Object.keys(style).forEach((key) => {\n      canvas.style[key] = style[key];\n    });\n\n    // The canvas render size might have been changed (and thus the state stack discarded),\n    // we can't use save() and restore() to restore the initial state. So make sure that at\n    // least the canvas context is reset to the default state by setting the canvas width.\n    // https://www.w3.org/TR/2011/WD-html5-20110525/the-canvas-element.html\n    // eslint-disable-next-line no-self-assign\n    canvas.width = canvas.width;\n\n    delete canvas[EXPANDO_KEY];\n    return true;\n  }\n\n  /**\n\t *\n\t * @param {Chart} chart\n\t * @param {string} type\n\t * @param {function} listener\n\t */\n  addEventListener(chart, type, listener) {\n    // Can have only one listener per type, so make sure previous is removed\n    this.removeEventListener(chart, type);\n\n    const proxies = chart.$proxies || (chart.$proxies = {});\n    const handlers = {\n      attach: createAttachObserver,\n      detach: createDetachObserver,\n      resize: createResizeObserver\n    };\n    const handler = handlers[type] || createProxyAndListen;\n    proxies[type] = handler(chart, type, listener);\n  }\n\n\n  /**\n\t * @param {Chart} chart\n\t * @param {string} type\n\t */\n  removeEventListener(chart, type) {\n    const proxies = chart.$proxies || (chart.$proxies = {});\n    const proxy = proxies[type];\n\n    if (!proxy) {\n      return;\n    }\n\n    const handlers = {\n      attach: releaseObserver,\n      detach: releaseObserver,\n      resize: releaseObserver\n    };\n    const handler = handlers[type] || removeListener;\n    handler(chart, type, proxy);\n    proxies[type] = undefined;\n  }\n\n  getDevicePixelRatio() {\n    return window.devicePixelRatio;\n  }\n\n  /**\n\t * @param {HTMLCanvasElement} canvas\n\t * @param {number} [width] - content width of parent element\n\t * @param {number} [height] - content height of parent element\n\t * @param {number} [aspectRatio] - aspect ratio to maintain\n\t */\n  getMaximumSize(canvas, width, height, aspectRatio) {\n    return getMaximumSize(canvas, width, height, aspectRatio);\n  }\n\n  /**\n\t * @param {HTMLCanvasElement} canvas\n\t */\n  isAttached(canvas) {\n    const container = _getParentNode(canvas);\n    return !!(container && container.isConnected);\n  }\n}\n","import {_isDomSupported} from '../helpers';\nimport BasePlatform from './platform.base';\nimport BasicPlatform from './platform.basic';\nimport DomPlatform from './platform.dom';\n\nexport function _detectPlatform(canvas) {\n  if (!_isDomSupported() || (typeof OffscreenCanvas !== 'undefined' && canvas instanceof OffscreenCanvas)) {\n    return BasicPlatform;\n  }\n  return DomPlatform;\n}\n\nexport {BasePlatform, BasicPlatform, DomPlatform};\n","import effects from '../helpers/helpers.easing';\nimport {resolve} from '../helpers/helpers.options';\nimport {color as helpersColor} from '../helpers/helpers.color';\n\nconst transparent = 'transparent';\nconst interpolators = {\n  boolean(from, to, factor) {\n    return factor > 0.5 ? to : from;\n  },\n  /**\n   * @param {string} from\n   * @param {string} to\n   * @param {number} factor\n   */\n  color(from, to, factor) {\n    const c0 = helpersColor(from || transparent);\n    const c1 = c0.valid && helpersColor(to || transparent);\n    return c1 && c1.valid\n      ? c1.mix(c0, factor).hexString()\n      : to;\n  },\n  number(from, to, factor) {\n    return from + (to - from) * factor;\n  }\n};\n\nexport default class Animation {\n  constructor(cfg, target, prop, to) {\n    const currentValue = target[prop];\n\n    to = resolve([cfg.to, to, currentValue, cfg.from]);\n    const from = resolve([cfg.from, currentValue, to]);\n\n    this._active = true;\n    this._fn = cfg.fn || interpolators[cfg.type || typeof from];\n    this._easing = effects[cfg.easing] || effects.linear;\n    this._start = Math.floor(Date.now() + (cfg.delay || 0));\n    this._duration = this._total = Math.floor(cfg.duration);\n    this._loop = !!cfg.loop;\n    this._target = target;\n    this._prop = prop;\n    this._from = from;\n    this._to = to;\n    this._promises = undefined;\n  }\n\n  active() {\n    return this._active;\n  }\n\n  update(cfg, to, date) {\n    if (this._active) {\n      this._notify(false);\n\n      const currentValue = this._target[this._prop];\n      const elapsed = date - this._start;\n      const remain = this._duration - elapsed;\n      this._start = date;\n      this._duration = Math.floor(Math.max(remain, cfg.duration));\n      this._total += elapsed;\n      this._loop = !!cfg.loop;\n      this._to = resolve([cfg.to, to, currentValue, cfg.from]);\n      this._from = resolve([cfg.from, currentValue, to]);\n    }\n  }\n\n  cancel() {\n    if (this._active) {\n      // update current evaluated value, for smoother animations\n      this.tick(Date.now());\n      this._active = false;\n      this._notify(false);\n    }\n  }\n\n  tick(date) {\n    const elapsed = date - this._start;\n    const duration = this._duration;\n    const prop = this._prop;\n    const from = this._from;\n    const loop = this._loop;\n    const to = this._to;\n    let factor;\n\n    this._active = from !== to && (loop || (elapsed < duration));\n\n    if (!this._active) {\n      this._target[prop] = to;\n      this._notify(true);\n      return;\n    }\n\n    if (elapsed < 0) {\n      this._target[prop] = from;\n      return;\n    }\n\n    factor = (elapsed / duration) % 2;\n    factor = loop && factor > 1 ? 2 - factor : factor;\n    factor = this._easing(Math.min(1, Math.max(0, factor)));\n\n    this._target[prop] = this._fn(from, to, factor);\n  }\n\n  wait() {\n    const promises = this._promises || (this._promises = []);\n    return new Promise((res, rej) => {\n      promises.push({res, rej});\n    });\n  }\n\n  _notify(resolved) {\n    const method = resolved ? 'res' : 'rej';\n    const promises = this._promises || [];\n    for (let i = 0; i < promises.length; i++) {\n      promises[i][method]();\n    }\n  }\n}\n","import animator from './core.animator';\nimport Animation from './core.animation';\nimport defaults from './core.defaults';\nimport {isArray, isObject} from '../helpers/helpers.core';\n\nexport default class Animations {\n  constructor(chart, config) {\n    this._chart = chart;\n    this._properties = new Map();\n    this.configure(config);\n  }\n\n  configure(config) {\n    if (!isObject(config)) {\n      return;\n    }\n\n    const animationOptions = Object.keys(defaults.animation);\n    const animatedProps = this._properties;\n\n    Object.getOwnPropertyNames(config).forEach(key => {\n      const cfg = config[key];\n      if (!isObject(cfg)) {\n        return;\n      }\n      const resolved = {};\n      for (const option of animationOptions) {\n        resolved[option] = cfg[option];\n      }\n\n      (isArray(cfg.properties) && cfg.properties || [key]).forEach((prop) => {\n        if (prop === key || !animatedProps.has(prop)) {\n          animatedProps.set(prop, resolved);\n        }\n      });\n    });\n  }\n\n  /**\n\t * Utility to handle animation of `options`.\n\t * @private\n\t */\n  _animateOptions(target, values) {\n    const newOptions = values.options;\n    const options = resolveTargetOptions(target, newOptions);\n    if (!options) {\n      return [];\n    }\n\n    const animations = this._createAnimations(options, newOptions);\n    if (newOptions.$shared) {\n      // Going to shared options:\n      // After all animations are done, assign the shared options object to the element\n      // So any new updates to the shared options are observed\n      awaitAll(target.options.$animations, newOptions).then(() => {\n        target.options = newOptions;\n      }, () => {\n        // rejected, noop\n      });\n    }\n\n    return animations;\n  }\n\n  /**\n\t * @private\n\t */\n  _createAnimations(target, values) {\n    const animatedProps = this._properties;\n    const animations = [];\n    const running = target.$animations || (target.$animations = {});\n    const props = Object.keys(values);\n    const date = Date.now();\n    let i;\n\n    for (i = props.length - 1; i >= 0; --i) {\n      const prop = props[i];\n      if (prop.charAt(0) === '$') {\n        continue;\n      }\n\n      if (prop === 'options') {\n        animations.push(...this._animateOptions(target, values));\n        continue;\n      }\n      const value = values[prop];\n      let animation = running[prop];\n      const cfg = animatedProps.get(prop);\n\n      if (animation) {\n        if (cfg && animation.active()) {\n          // There is an existing active animation, let's update that\n          animation.update(cfg, value, date);\n          continue;\n        } else {\n          animation.cancel();\n        }\n      }\n      if (!cfg || !cfg.duration) {\n        // not animated, set directly to new value\n        target[prop] = value;\n        continue;\n      }\n\n      running[prop] = animation = new Animation(cfg, target, prop, value);\n      animations.push(animation);\n    }\n    return animations;\n  }\n\n\n  /**\n\t * Update `target` properties to new values, using configured animations\n\t * @param {object} target - object to update\n\t * @param {object} values - new target properties\n\t * @returns {boolean|undefined} - `true` if animations were started\n\t **/\n  update(target, values) {\n    if (this._properties.size === 0) {\n      // Nothing is animated, just apply the new values.\n      Object.assign(target, values);\n      return;\n    }\n\n    const animations = this._createAnimations(target, values);\n\n    if (animations.length) {\n      animator.add(this._chart, animations);\n      return true;\n    }\n  }\n}\n\nfunction awaitAll(animations, properties) {\n  const running = [];\n  const keys = Object.keys(properties);\n  for (let i = 0; i < keys.length; i++) {\n    const anim = animations[keys[i]];\n    if (anim && anim.active()) {\n      running.push(anim.wait());\n    }\n  }\n  // @ts-ignore\n  return Promise.all(running);\n}\n\nfunction resolveTargetOptions(target, newOptions) {\n  if (!newOptions) {\n    return;\n  }\n  let options = target.options;\n  if (!options) {\n    target.options = newOptions;\n    return;\n  }\n  if (options.$shared) {\n    // Going from shared options to distinct one:\n    // Create new options object containing the old shared values and start updating that.\n    target.options = options = Object.assign({}, options, {$shared: false, $animations: {}});\n  }\n  return options;\n}\n","import Animations from './core.animations';\nimport defaults from './core.defaults';\nimport {isArray, isFinite, isObject, valueOrDefault, resolveObjectKey, defined} from '../helpers/helpers.core';\nimport {listenArrayEvents, unlistenArrayEvents} from '../helpers/helpers.collection';\nimport {createContext, sign} from '../helpers';\n\n/**\n * @typedef { import(\"./core.controller\").default } Chart\n * @typedef { import(\"./core.scale\").default } Scale\n */\n\nfunction scaleClip(scale, allowedOverflow) {\n  const opts = scale && scale.options || {};\n  const reverse = opts.reverse;\n  const min = opts.min === undefined ? allowedOverflow : 0;\n  const max = opts.max === undefined ? allowedOverflow : 0;\n  return {\n    start: reverse ? max : min,\n    end: reverse ? min : max\n  };\n}\n\nfunction defaultClip(xScale, yScale, allowedOverflow) {\n  if (allowedOverflow === false) {\n    return false;\n  }\n  const x = scaleClip(xScale, allowedOverflow);\n  const y = scaleClip(yScale, allowedOverflow);\n\n  return {\n    top: y.end,\n    right: x.end,\n    bottom: y.start,\n    left: x.start\n  };\n}\n\nfunction toClip(value) {\n  let t, r, b, l;\n\n  if (isObject(value)) {\n    t = value.top;\n    r = value.right;\n    b = value.bottom;\n    l = value.left;\n  } else {\n    t = r = b = l = value;\n  }\n\n  return {\n    top: t,\n    right: r,\n    bottom: b,\n    left: l,\n    disabled: value === false\n  };\n}\n\nfunction getSortedDatasetIndices(chart, filterVisible) {\n  const keys = [];\n  const metasets = chart._getSortedDatasetMetas(filterVisible);\n  let i, ilen;\n\n  for (i = 0, ilen = metasets.length; i < ilen; ++i) {\n    keys.push(metasets[i].index);\n  }\n  return keys;\n}\n\nfunction applyStack(stack, value, dsIndex, options = {}) {\n  const keys = stack.keys;\n  const singleMode = options.mode === 'single';\n  let i, ilen, datasetIndex, otherValue;\n\n  if (value === null) {\n    return;\n  }\n\n  for (i = 0, ilen = keys.length; i < ilen; ++i) {\n    datasetIndex = +keys[i];\n    if (datasetIndex === dsIndex) {\n      if (options.all) {\n        continue;\n      }\n      break;\n    }\n    otherValue = stack.values[datasetIndex];\n    if (isFinite(otherValue) && (singleMode || (value === 0 || sign(value) === sign(otherValue)))) {\n      value += otherValue;\n    }\n  }\n  return value;\n}\n\nfunction convertObjectDataToArray(data) {\n  const keys = Object.keys(data);\n  const adata = new Array(keys.length);\n  let i, ilen, key;\n  for (i = 0, ilen = keys.length; i < ilen; ++i) {\n    key = keys[i];\n    adata[i] = {\n      x: key,\n      y: data[key]\n    };\n  }\n  return adata;\n}\n\nfunction isStacked(scale, meta) {\n  const stacked = scale && scale.options.stacked;\n  return stacked || (stacked === undefined && meta.stack !== undefined);\n}\n\nfunction getStackKey(indexScale, valueScale, meta) {\n  return `${indexScale.id}.${valueScale.id}.${meta.stack || meta.type}`;\n}\n\nfunction getUserBounds(scale) {\n  const {min, max, minDefined, maxDefined} = scale.getUserBounds();\n  return {\n    min: minDefined ? min : Number.NEGATIVE_INFINITY,\n    max: maxDefined ? max : Number.POSITIVE_INFINITY\n  };\n}\n\nfunction getOrCreateStack(stacks, stackKey, indexValue) {\n  const subStack = stacks[stackKey] || (stacks[stackKey] = {});\n  return subStack[indexValue] || (subStack[indexValue] = {});\n}\n\nfunction getLastIndexInStack(stack, vScale, positive, type) {\n  for (const meta of vScale.getMatchingVisibleMetas(type).reverse()) {\n    const value = stack[meta.index];\n    if ((positive && value > 0) || (!positive && value < 0)) {\n      return meta.index;\n    }\n  }\n\n  return null;\n}\n\nfunction updateStacks(controller, parsed) {\n  const {chart, _cachedMeta: meta} = controller;\n  const stacks = chart._stacks || (chart._stacks = {}); // map structure is {stackKey: {datasetIndex: value}}\n  const {iScale, vScale, index: datasetIndex} = meta;\n  const iAxis = iScale.axis;\n  const vAxis = vScale.axis;\n  const key = getStackKey(iScale, vScale, meta);\n  const ilen = parsed.length;\n  let stack;\n\n  for (let i = 0; i < ilen; ++i) {\n    const item = parsed[i];\n    const {[iAxis]: index, [vAxis]: value} = item;\n    const itemStacks = item._stacks || (item._stacks = {});\n    stack = itemStacks[vAxis] = getOrCreateStack(stacks, key, index);\n    stack[datasetIndex] = value;\n\n    stack._top = getLastIndexInStack(stack, vScale, true, meta.type);\n    stack._bottom = getLastIndexInStack(stack, vScale, false, meta.type);\n  }\n}\n\nfunction getFirstScaleId(chart, axis) {\n  const scales = chart.scales;\n  return Object.keys(scales).filter(key => scales[key].axis === axis).shift();\n}\n\nfunction createDatasetContext(parent, index) {\n  return createContext(parent,\n    {\n      active: false,\n      dataset: undefined,\n      datasetIndex: index,\n      index,\n      mode: 'default',\n      type: 'dataset'\n    }\n  );\n}\n\nfunction createDataContext(parent, index, element) {\n  return createContext(parent, {\n    active: false,\n    dataIndex: index,\n    parsed: undefined,\n    raw: undefined,\n    element,\n    index,\n    mode: 'default',\n    type: 'data'\n  });\n}\n\nfunction clearStacks(meta, items) {\n  // Not using meta.index here, because it might be already updated if the dataset changed location\n  const datasetIndex = meta.controller.index;\n  const axis = meta.vScale && meta.vScale.axis;\n  if (!axis) {\n    return;\n  }\n\n  items = items || meta._parsed;\n  for (const parsed of items) {\n    const stacks = parsed._stacks;\n    if (!stacks || stacks[axis] === undefined || stacks[axis][datasetIndex] === undefined) {\n      return;\n    }\n    delete stacks[axis][datasetIndex];\n  }\n}\n\nconst isDirectUpdateMode = (mode) => mode === 'reset' || mode === 'none';\nconst cloneIfNotShared = (cached, shared) => shared ? cached : Object.assign({}, cached);\nconst createStack = (canStack, meta, chart) => canStack && !meta.hidden && meta._stacked\n  && {keys: getSortedDatasetIndices(chart, true), values: null};\n\nexport default class DatasetController {\n\n  /**\n   * @type {any}\n   */\n  static defaults = {};\n\n  /**\n   * Element type used to generate a meta dataset (e.g. Chart.element.LineElement).\n   */\n  static datasetElementType = null;\n\n  /**\n   * Element type used to generate a meta data (e.g. Chart.element.PointElement).\n   */\n  static dataElementType = null;\n\n  /**\n\t * @param {Chart} chart\n\t * @param {number} datasetIndex\n\t */\n  constructor(chart, datasetIndex) {\n    this.chart = chart;\n    this._ctx = chart.ctx;\n    this.index = datasetIndex;\n    this._cachedDataOpts = {};\n    this._cachedMeta = this.getMeta();\n    this._type = this._cachedMeta.type;\n    this.options = undefined;\n    /** @type {boolean | object} */\n    this._parsing = false;\n    this._data = undefined;\n    this._objectData = undefined;\n    this._sharedOptions = undefined;\n    this._drawStart = undefined;\n    this._drawCount = undefined;\n    this.enableOptionSharing = false;\n    this.supportsDecimation = false;\n    this.$context = undefined;\n    this._syncList = [];\n    this.datasetElementType = new.target.datasetElementType;\n    this.dataElementType = new.target.dataElementType;\n\n    this.initialize();\n  }\n\n  initialize() {\n    const meta = this._cachedMeta;\n    this.configure();\n    this.linkScales();\n    meta._stacked = isStacked(meta.vScale, meta);\n    this.addElements();\n\n    if (this.options.fill && !this.chart.isPluginEnabled('filler')) {\n      console.warn(\"Tried to use the 'fill' option without the 'Filler' plugin enabled. Please import and register the 'Filler' plugin and make sure it is not disabled in the options\");\n    }\n  }\n\n  updateIndex(datasetIndex) {\n    if (this.index !== datasetIndex) {\n      clearStacks(this._cachedMeta);\n    }\n    this.index = datasetIndex;\n  }\n\n  linkScales() {\n    const chart = this.chart;\n    const meta = this._cachedMeta;\n    const dataset = this.getDataset();\n\n    const chooseId = (axis, x, y, r) => axis === 'x' ? x : axis === 'r' ? r : y;\n\n    const xid = meta.xAxisID = valueOrDefault(dataset.xAxisID, getFirstScaleId(chart, 'x'));\n    const yid = meta.yAxisID = valueOrDefault(dataset.yAxisID, getFirstScaleId(chart, 'y'));\n    const rid = meta.rAxisID = valueOrDefault(dataset.rAxisID, getFirstScaleId(chart, 'r'));\n    const indexAxis = meta.indexAxis;\n    const iid = meta.iAxisID = chooseId(indexAxis, xid, yid, rid);\n    const vid = meta.vAxisID = chooseId(indexAxis, yid, xid, rid);\n    meta.xScale = this.getScaleForId(xid);\n    meta.yScale = this.getScaleForId(yid);\n    meta.rScale = this.getScaleForId(rid);\n    meta.iScale = this.getScaleForId(iid);\n    meta.vScale = this.getScaleForId(vid);\n  }\n\n  getDataset() {\n    return this.chart.data.datasets[this.index];\n  }\n\n  getMeta() {\n    return this.chart.getDatasetMeta(this.index);\n  }\n\n  /**\n\t * @param {string} scaleID\n\t * @return {Scale}\n\t */\n  getScaleForId(scaleID) {\n    return this.chart.scales[scaleID];\n  }\n\n  /**\n\t * @private\n\t */\n  _getOtherScale(scale) {\n    const meta = this._cachedMeta;\n    return scale === meta.iScale\n      ? meta.vScale\n      : meta.iScale;\n  }\n\n  reset() {\n    this._update('reset');\n  }\n\n  /**\n\t * @private\n\t */\n  _destroy() {\n    const meta = this._cachedMeta;\n    if (this._data) {\n      unlistenArrayEvents(this._data, this);\n    }\n    if (meta._stacked) {\n      clearStacks(meta);\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _dataCheck() {\n    const dataset = this.getDataset();\n    const data = dataset.data || (dataset.data = []);\n    const _data = this._data;\n\n    // In order to correctly handle data addition/deletion animation (an thus simulate\n    // real-time charts), we need to monitor these data modifications and synchronize\n    // the internal meta data accordingly.\n\n    if (isObject(data)) {\n      this._data = convertObjectDataToArray(data);\n    } else if (_data !== data) {\n      if (_data) {\n        // This case happens when the user replaced the data array instance.\n        unlistenArrayEvents(_data, this);\n        // Discard old parsed data and stacks\n        const meta = this._cachedMeta;\n        clearStacks(meta);\n        meta._parsed = [];\n      }\n      if (data && Object.isExtensible(data)) {\n        listenArrayEvents(data, this);\n      }\n      this._syncList = [];\n      this._data = data;\n    }\n  }\n\n  addElements() {\n    const meta = this._cachedMeta;\n\n    this._dataCheck();\n\n    if (this.datasetElementType) {\n      meta.dataset = new this.datasetElementType();\n    }\n  }\n\n  buildOrUpdateElements(resetNewElements) {\n    const meta = this._cachedMeta;\n    const dataset = this.getDataset();\n    let stackChanged = false;\n\n    this._dataCheck();\n\n    // make sure cached _stacked status is current\n    const oldStacked = meta._stacked;\n    meta._stacked = isStacked(meta.vScale, meta);\n\n    // detect change in stack option\n    if (meta.stack !== dataset.stack) {\n      stackChanged = true;\n      // remove values from old stack\n      clearStacks(meta);\n      meta.stack = dataset.stack;\n    }\n\n    // Re-sync meta data in case the user replaced the data array or if we missed\n    // any updates and so make sure that we handle number of datapoints changing.\n    this._resyncElements(resetNewElements);\n\n    // if stack changed, update stack values for the whole dataset\n    if (stackChanged || oldStacked !== meta._stacked) {\n      updateStacks(this, meta._parsed);\n    }\n  }\n\n  /**\n\t * Merges user-supplied and default dataset-level options\n\t * @private\n\t */\n  configure() {\n    const config = this.chart.config;\n    const scopeKeys = config.datasetScopeKeys(this._type);\n    const scopes = config.getOptionScopes(this.getDataset(), scopeKeys, true);\n    this.options = config.createResolver(scopes, this.getContext());\n    this._parsing = this.options.parsing;\n    this._cachedDataOpts = {};\n  }\n\n  /**\n\t * @param {number} start\n\t * @param {number} count\n\t */\n  parse(start, count) {\n    const {_cachedMeta: meta, _data: data} = this;\n    const {iScale, _stacked} = meta;\n    const iAxis = iScale.axis;\n\n    let sorted = start === 0 && count === data.length ? true : meta._sorted;\n    let prev = start > 0 && meta._parsed[start - 1];\n    let i, cur, parsed;\n\n    if (this._parsing === false) {\n      meta._parsed = data;\n      meta._sorted = true;\n      parsed = data;\n    } else {\n      if (isArray(data[start])) {\n        parsed = this.parseArrayData(meta, data, start, count);\n      } else if (isObject(data[start])) {\n        parsed = this.parseObjectData(meta, data, start, count);\n      } else {\n        parsed = this.parsePrimitiveData(meta, data, start, count);\n      }\n\n      const isNotInOrderComparedToPrev = () => cur[iAxis] === null || (prev && cur[iAxis] < prev[iAxis]);\n      for (i = 0; i < count; ++i) {\n        meta._parsed[i + start] = cur = parsed[i];\n        if (sorted) {\n          if (isNotInOrderComparedToPrev()) {\n            sorted = false;\n          }\n          prev = cur;\n        }\n      }\n      meta._sorted = sorted;\n    }\n\n    if (_stacked) {\n      updateStacks(this, parsed);\n    }\n  }\n\n  /**\n\t * Parse array of primitive values\n\t * @param {object} meta - dataset meta\n\t * @param {array} data - data array. Example [1,3,4]\n\t * @param {number} start - start index\n\t * @param {number} count - number of items to parse\n\t * @returns {object} parsed item - item containing index and a parsed value\n\t * for each scale id.\n\t * Example: {xScale0: 0, yScale0: 1}\n\t * @protected\n\t */\n  parsePrimitiveData(meta, data, start, count) {\n    const {iScale, vScale} = meta;\n    const iAxis = iScale.axis;\n    const vAxis = vScale.axis;\n    const labels = iScale.getLabels();\n    const singleScale = iScale === vScale;\n    const parsed = new Array(count);\n    let i, ilen, index;\n\n    for (i = 0, ilen = count; i < ilen; ++i) {\n      index = i + start;\n      parsed[i] = {\n        [iAxis]: singleScale || iScale.parse(labels[index], index),\n        [vAxis]: vScale.parse(data[index], index)\n      };\n    }\n    return parsed;\n  }\n\n  /**\n\t * Parse array of arrays\n\t * @param {object} meta - dataset meta\n\t * @param {array} data - data array. Example [[1,2],[3,4]]\n\t * @param {number} start - start index\n\t * @param {number} count - number of items to parse\n\t * @returns {object} parsed item - item containing index and a parsed value\n\t * for each scale id.\n\t * Example: {x: 0, y: 1}\n\t * @protected\n\t */\n  parseArrayData(meta, data, start, count) {\n    const {xScale, yScale} = meta;\n    const parsed = new Array(count);\n    let i, ilen, index, item;\n\n    for (i = 0, ilen = count; i < ilen; ++i) {\n      index = i + start;\n      item = data[index];\n      parsed[i] = {\n        x: xScale.parse(item[0], index),\n        y: yScale.parse(item[1], index)\n      };\n    }\n    return parsed;\n  }\n\n  /**\n\t * Parse array of objects\n\t * @param {object} meta - dataset meta\n\t * @param {array} data - data array. Example [{x:1, y:5}, {x:2, y:10}]\n\t * @param {number} start - start index\n\t * @param {number} count - number of items to parse\n\t * @returns {object} parsed item - item containing index and a parsed value\n\t * for each scale id. _custom is optional\n\t * Example: {xScale0: 0, yScale0: 1, _custom: {r: 10, foo: 'bar'}}\n\t * @protected\n\t */\n  parseObjectData(meta, data, start, count) {\n    const {xScale, yScale} = meta;\n    const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;\n    const parsed = new Array(count);\n    let i, ilen, index, item;\n\n    for (i = 0, ilen = count; i < ilen; ++i) {\n      index = i + start;\n      item = data[index];\n      parsed[i] = {\n        x: xScale.parse(resolveObjectKey(item, xAxisKey), index),\n        y: yScale.parse(resolveObjectKey(item, yAxisKey), index)\n      };\n    }\n    return parsed;\n  }\n\n  /**\n\t * @protected\n\t */\n  getParsed(index) {\n    return this._cachedMeta._parsed[index];\n  }\n\n  /**\n\t * @protected\n\t */\n  getDataElement(index) {\n    return this._cachedMeta.data[index];\n  }\n\n  /**\n\t * @protected\n\t */\n  applyStack(scale, parsed, mode) {\n    const chart = this.chart;\n    const meta = this._cachedMeta;\n    const value = parsed[scale.axis];\n    const stack = {\n      keys: getSortedDatasetIndices(chart, true),\n      values: parsed._stacks[scale.axis]\n    };\n    return applyStack(stack, value, meta.index, {mode});\n  }\n\n  /**\n\t * @protected\n\t */\n  updateRangeFromParsed(range, scale, parsed, stack) {\n    const parsedValue = parsed[scale.axis];\n    let value = parsedValue === null ? NaN : parsedValue;\n    const values = stack && parsed._stacks[scale.axis];\n    if (stack && values) {\n      stack.values = values;\n      value = applyStack(stack, parsedValue, this._cachedMeta.index);\n    }\n    range.min = Math.min(range.min, value);\n    range.max = Math.max(range.max, value);\n  }\n\n  /**\n\t * @protected\n\t */\n  getMinMax(scale, canStack) {\n    const meta = this._cachedMeta;\n    const _parsed = meta._parsed;\n    const sorted = meta._sorted && scale === meta.iScale;\n    const ilen = _parsed.length;\n    const otherScale = this._getOtherScale(scale);\n    const stack = createStack(canStack, meta, this.chart);\n    const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};\n    const {min: otherMin, max: otherMax} = getUserBounds(otherScale);\n    let i, parsed;\n\n    function _skip() {\n      parsed = _parsed[i];\n      const otherValue = parsed[otherScale.axis];\n      return !isFinite(parsed[scale.axis]) || otherMin > otherValue || otherMax < otherValue;\n    }\n\n    for (i = 0; i < ilen; ++i) {\n      if (_skip()) {\n        continue;\n      }\n      this.updateRangeFromParsed(range, scale, parsed, stack);\n      if (sorted) {\n        // if the data is sorted, we don't need to check further from this end of array\n        break;\n      }\n    }\n    if (sorted) {\n      // in the sorted case, find first non-skipped value from other end of array\n      for (i = ilen - 1; i >= 0; --i) {\n        if (_skip()) {\n          continue;\n        }\n        this.updateRangeFromParsed(range, scale, parsed, stack);\n        break;\n      }\n    }\n    return range;\n  }\n\n  getAllParsedValues(scale) {\n    const parsed = this._cachedMeta._parsed;\n    const values = [];\n    let i, ilen, value;\n\n    for (i = 0, ilen = parsed.length; i < ilen; ++i) {\n      value = parsed[i][scale.axis];\n      if (isFinite(value)) {\n        values.push(value);\n      }\n    }\n    return values;\n  }\n\n  /**\n\t * @return {number|boolean}\n\t * @protected\n\t */\n  getMaxOverflow() {\n    return false;\n  }\n\n  /**\n\t * @protected\n\t */\n  getLabelAndValue(index) {\n    const meta = this._cachedMeta;\n    const iScale = meta.iScale;\n    const vScale = meta.vScale;\n    const parsed = this.getParsed(index);\n    return {\n      label: iScale ? '' + iScale.getLabelForValue(parsed[iScale.axis]) : '',\n      value: vScale ? '' + vScale.getLabelForValue(parsed[vScale.axis]) : ''\n    };\n  }\n\n  /**\n\t * @private\n\t */\n  _update(mode) {\n    const meta = this._cachedMeta;\n    this.update(mode || 'default');\n    meta._clip = toClip(valueOrDefault(this.options.clip, defaultClip(meta.xScale, meta.yScale, this.getMaxOverflow())));\n  }\n\n  /**\n\t * @param {string} mode\n\t */\n  update(mode) {} // eslint-disable-line no-unused-vars\n\n  draw() {\n    const ctx = this._ctx;\n    const chart = this.chart;\n    const meta = this._cachedMeta;\n    const elements = meta.data || [];\n    const area = chart.chartArea;\n    const active = [];\n    const start = this._drawStart || 0;\n    const count = this._drawCount || (elements.length - start);\n    const drawActiveElementsOnTop = this.options.drawActiveElementsOnTop;\n    let i;\n\n    if (meta.dataset) {\n      meta.dataset.draw(ctx, area, start, count);\n    }\n\n    for (i = start; i < start + count; ++i) {\n      const element = elements[i];\n      if (element.hidden) {\n        continue;\n      }\n      if (element.active && drawActiveElementsOnTop) {\n        active.push(element);\n      } else {\n        element.draw(ctx, area);\n      }\n    }\n\n    for (i = 0; i < active.length; ++i) {\n      active[i].draw(ctx, area);\n    }\n  }\n\n  /**\n\t * Returns a set of predefined style properties that should be used to represent the dataset\n\t * or the data if the index is specified\n\t * @param {number} index - data index\n\t * @param {boolean} [active] - true if hover\n\t * @return {object} style object\n\t */\n  getStyle(index, active) {\n    const mode = active ? 'active' : 'default';\n    return index === undefined && this._cachedMeta.dataset\n      ? this.resolveDatasetElementOptions(mode)\n      : this.resolveDataElementOptions(index || 0, mode);\n  }\n\n  /**\n\t * @protected\n\t */\n  getContext(index, active, mode) {\n    const dataset = this.getDataset();\n    let context;\n    if (index >= 0 && index < this._cachedMeta.data.length) {\n      const element = this._cachedMeta.data[index];\n      context = element.$context ||\n        (element.$context = createDataContext(this.getContext(), index, element));\n      context.parsed = this.getParsed(index);\n      context.raw = dataset.data[index];\n      context.index = context.dataIndex = index;\n    } else {\n      context = this.$context ||\n        (this.$context = createDatasetContext(this.chart.getContext(), this.index));\n      context.dataset = dataset;\n      context.index = context.datasetIndex = this.index;\n    }\n\n    context.active = !!active;\n    context.mode = mode;\n    return context;\n  }\n\n  /**\n\t * @param {string} [mode]\n\t * @protected\n\t */\n  resolveDatasetElementOptions(mode) {\n    return this._resolveElementOptions(this.datasetElementType.id, mode);\n  }\n\n  /**\n\t * @param {number} index\n\t * @param {string} [mode]\n\t * @protected\n\t */\n  resolveDataElementOptions(index, mode) {\n    return this._resolveElementOptions(this.dataElementType.id, mode, index);\n  }\n\n  /**\n\t * @private\n\t */\n  _resolveElementOptions(elementType, mode = 'default', index) {\n    const active = mode === 'active';\n    const cache = this._cachedDataOpts;\n    const cacheKey = elementType + '-' + mode;\n    const cached = cache[cacheKey];\n    const sharing = this.enableOptionSharing && defined(index);\n    if (cached) {\n      return cloneIfNotShared(cached, sharing);\n    }\n    const config = this.chart.config;\n    const scopeKeys = config.datasetElementScopeKeys(this._type, elementType);\n    const prefixes = active ? [`${elementType}Hover`, 'hover', elementType, ''] : [elementType, ''];\n    const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);\n    const names = Object.keys(defaults.elements[elementType]);\n    // context is provided as a function, and is called only if needed,\n    // so we don't create a context for each element if not needed.\n    const context = () => this.getContext(index, active);\n    const values = config.resolveNamedOptions(scopes, names, context, prefixes);\n\n    if (values.$shared) {\n      // `$shared` indicates this set of options can be shared between multiple elements.\n      // Sharing is used to reduce number of properties to change during animation.\n      values.$shared = sharing;\n\n      // We cache options by `mode`, which can be 'active' for example. This enables us\n      // to have the 'active' element options and 'default' options to switch between\n      // when interacting.\n      cache[cacheKey] = Object.freeze(cloneIfNotShared(values, sharing));\n    }\n\n    return values;\n  }\n\n\n  /**\n\t * @private\n\t */\n  _resolveAnimations(index, transition, active) {\n    const chart = this.chart;\n    const cache = this._cachedDataOpts;\n    const cacheKey = `animation-${transition}`;\n    const cached = cache[cacheKey];\n    if (cached) {\n      return cached;\n    }\n    let options;\n    if (chart.options.animation !== false) {\n      const config = this.chart.config;\n      const scopeKeys = config.datasetAnimationScopeKeys(this._type, transition);\n      const scopes = config.getOptionScopes(this.getDataset(), scopeKeys);\n      options = config.createResolver(scopes, this.getContext(index, active, transition));\n    }\n    const animations = new Animations(chart, options && options.animations);\n    if (options && options._cacheable) {\n      cache[cacheKey] = Object.freeze(animations);\n    }\n    return animations;\n  }\n\n  /**\n\t * Utility for getting the options object shared between elements\n\t * @protected\n\t */\n  getSharedOptions(options) {\n    if (!options.$shared) {\n      return;\n    }\n    return this._sharedOptions || (this._sharedOptions = Object.assign({}, options));\n  }\n\n  /**\n\t * Utility for determining if `options` should be included in the updated properties\n\t * @protected\n\t */\n  includeOptions(mode, sharedOptions) {\n    return !sharedOptions || isDirectUpdateMode(mode) || this.chart._animationsDisabled;\n  }\n\n  /**\n   * @todo v4, rename to getSharedOptions and remove excess functions\n   */\n  _getSharedOptions(start, mode) {\n    const firstOpts = this.resolveDataElementOptions(start, mode);\n    const previouslySharedOptions = this._sharedOptions;\n    const sharedOptions = this.getSharedOptions(firstOpts);\n    const includeOptions = this.includeOptions(mode, sharedOptions) || (sharedOptions !== previouslySharedOptions);\n    this.updateSharedOptions(sharedOptions, mode, firstOpts);\n    return {sharedOptions, includeOptions};\n  }\n\n  /**\n\t * Utility for updating an element with new properties, using animations when appropriate.\n\t * @protected\n\t */\n  updateElement(element, index, properties, mode) {\n    if (isDirectUpdateMode(mode)) {\n      Object.assign(element, properties);\n    } else {\n      this._resolveAnimations(index, mode).update(element, properties);\n    }\n  }\n\n  /**\n\t * Utility to animate the shared options, that are potentially affecting multiple elements.\n\t * @protected\n\t */\n  updateSharedOptions(sharedOptions, mode, newOptions) {\n    if (sharedOptions && !isDirectUpdateMode(mode)) {\n      this._resolveAnimations(undefined, mode).update(sharedOptions, newOptions);\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _setStyle(element, index, mode, active) {\n    element.active = active;\n    const options = this.getStyle(index, active);\n    this._resolveAnimations(index, mode, active).update(element, {\n      // When going from active to inactive, we need to update to the shared options.\n      // This way the once hovered element will end up with the same original shared options instance, after animation.\n      options: (!active && this.getSharedOptions(options)) || options\n    });\n  }\n\n  removeHoverStyle(element, datasetIndex, index) {\n    this._setStyle(element, index, 'active', false);\n  }\n\n  setHoverStyle(element, datasetIndex, index) {\n    this._setStyle(element, index, 'active', true);\n  }\n\n  /**\n\t * @private\n\t */\n  _removeDatasetHoverStyle() {\n    const element = this._cachedMeta.dataset;\n\n    if (element) {\n      this._setStyle(element, undefined, 'active', false);\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _setDatasetHoverStyle() {\n    const element = this._cachedMeta.dataset;\n\n    if (element) {\n      this._setStyle(element, undefined, 'active', true);\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _resyncElements(resetNewElements) {\n    const data = this._data;\n    const elements = this._cachedMeta.data;\n\n    // Apply changes detected through array listeners\n    for (const [method, arg1, arg2] of this._syncList) {\n      this[method](arg1, arg2);\n    }\n    this._syncList = [];\n\n    const numMeta = elements.length;\n    const numData = data.length;\n    const count = Math.min(numData, numMeta);\n\n    if (count) {\n      // TODO: It is not optimal to always parse the old data\n      // This is done because we are not detecting direct assignments:\n      // chart.data.datasets[0].data[5] = 10;\n      // chart.data.datasets[0].data[5].y = 10;\n      this.parse(0, count);\n    }\n\n    if (numData > numMeta) {\n      this._insertElements(numMeta, numData - numMeta, resetNewElements);\n    } else if (numData < numMeta) {\n      this._removeElements(numData, numMeta - numData);\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _insertElements(start, count, resetNewElements = true) {\n    const meta = this._cachedMeta;\n    const data = meta.data;\n    const end = start + count;\n    let i;\n\n    const move = (arr) => {\n      arr.length += count;\n      for (i = arr.length - 1; i >= end; i--) {\n        arr[i] = arr[i - count];\n      }\n    };\n    move(data);\n\n    for (i = start; i < end; ++i) {\n      data[i] = new this.dataElementType();\n    }\n\n    if (this._parsing) {\n      move(meta._parsed);\n    }\n    this.parse(start, count);\n\n    if (resetNewElements) {\n      this.updateElements(data, start, count, 'reset');\n    }\n  }\n\n  updateElements(element, start, count, mode) {} // eslint-disable-line no-unused-vars\n\n  /**\n\t * @private\n\t */\n  _removeElements(start, count) {\n    const meta = this._cachedMeta;\n    if (this._parsing) {\n      const removed = meta._parsed.splice(start, count);\n      if (meta._stacked) {\n        clearStacks(meta, removed);\n      }\n    }\n    meta.data.splice(start, count);\n  }\n\n  /**\n\t * @private\n   */\n  _sync(args) {\n    if (this._parsing) {\n      this._syncList.push(args);\n    } else {\n      const [method, arg1, arg2] = args;\n      this[method](arg1, arg2);\n    }\n    this.chart._dataChanges.push([this.index, ...args]);\n  }\n\n  _onDataPush() {\n    const count = arguments.length;\n    this._sync(['_insertElements', this.getDataset().data.length - count, count]);\n  }\n\n  _onDataPop() {\n    this._sync(['_removeElements', this._cachedMeta.data.length - 1, 1]);\n  }\n\n  _onDataShift() {\n    this._sync(['_removeElements', 0, 1]);\n  }\n\n  _onDataSplice(start, count) {\n    if (count) {\n      this._sync(['_removeElements', start, count]);\n    }\n    const newCount = arguments.length - 2;\n    if (newCount) {\n      this._sync(['_insertElements', start, newCount]);\n    }\n  }\n\n  _onDataUnshift() {\n    this._sync(['_insertElements', 0, arguments.length]);\n  }\n}\n","import type {AnyObject} from '../../types/basic';\nimport type {Point} from '../../types/geometric';\nimport type {Animation} from '../../types/animation';\nimport {isNumber} from '../helpers/helpers.math';\n\nexport default class Element<T = AnyObject, O = AnyObject> {\n\n  static defaults = {};\n  static defaultRoutes = undefined;\n\n  x: number;\n  y: number;\n  active = false;\n  options: O;\n  $animations: Record<keyof T, Animation>;\n\n  tooltipPosition(useFinalPosition: boolean): Point {\n    const {x, y} = this.getProps(['x', 'y'], useFinalPosition);\n    return {x, y} as Point;\n  }\n\n  hasValue() {\n    return isNumber(this.x) && isNumber(this.y);\n  }\n\n  /**\n   * Gets the current or final value of each prop. Can return extra properties (whole object).\n   * @param props - properties to get\n   * @param [final] - get the final value (animation target)\n   */\n  getProps<P extends (keyof T)[]>(props: P, final?: boolean): Pick<T, P[number]>;\n  getProps<P extends string>(props: P[], final?: boolean): Partial<Record<P, unknown>>;\n  getProps(props: string[], final?: boolean): Partial<Record<string, unknown>> {\n    const anims = this.$animations;\n    if (!final || !anims) {\n      // let's not create an object, if not needed\n      return this as Record<string, unknown>;\n    }\n    const ret: Record<string, unknown> = {};\n    props.forEach((prop) => {\n      ret[prop] = anims[prop] && anims[prop].active() ? anims[prop]._to : this[prop as string];\n    });\n    return ret;\n  }\n}\n","import {isNullOrUndef, valueOrDefault} from '../helpers/helpers.core';\nimport {_factorize} from '../helpers/helpers.math';\n\n\n/**\n * @typedef { import(\"./core.controller\").default } Chart\n * @typedef {{value:number | string, label?:string, major?:boolean, $context?:any}} Tick\n */\n\n/**\n * Returns a subset of ticks to be plotted to avoid overlapping labels.\n * @param {import('./core.scale').default} scale\n * @param {Tick[]} ticks\n * @return {Tick[]}\n * @private\n */\nexport function autoSkip(scale, ticks) {\n  const tickOpts = scale.options.ticks;\n  const determinedMaxTicks = determineMaxTicks(scale);\n  const ticksLimit = Math.min(tickOpts.maxTicksLimit || determinedMaxTicks, determinedMaxTicks);\n  const majorIndices = tickOpts.major.enabled ? getMajorIndices(ticks) : [];\n  const numMajorIndices = majorIndices.length;\n  const first = majorIndices[0];\n  const last = majorIndices[numMajorIndices - 1];\n  const newTicks = [];\n\n  // If there are too many major ticks to display them all\n  if (numMajorIndices > ticksLimit) {\n    skipMajors(ticks, newTicks, majorIndices, numMajorIndices / ticksLimit);\n    return newTicks;\n  }\n\n  const spacing = calculateSpacing(majorIndices, ticks, ticksLimit);\n\n  if (numMajorIndices > 0) {\n    let i, ilen;\n    const avgMajorSpacing = numMajorIndices > 1 ? Math.round((last - first) / (numMajorIndices - 1)) : null;\n    skip(ticks, newTicks, spacing, isNullOrUndef(avgMajorSpacing) ? 0 : first - avgMajorSpacing, first);\n    for (i = 0, ilen = numMajorIndices - 1; i < ilen; i++) {\n      skip(ticks, newTicks, spacing, majorIndices[i], majorIndices[i + 1]);\n    }\n    skip(ticks, newTicks, spacing, last, isNullOrUndef(avgMajorSpacing) ? ticks.length : last + avgMajorSpacing);\n    return newTicks;\n  }\n  skip(ticks, newTicks, spacing);\n  return newTicks;\n}\n\nfunction determineMaxTicks(scale) {\n  const offset = scale.options.offset;\n  const tickLength = scale._tickSize();\n  const maxScale = scale._length / tickLength + (offset ? 0 : 1);\n  const maxChart = scale._maxLength / tickLength;\n  return Math.floor(Math.min(maxScale, maxChart));\n}\n\n/**\n * @param {number[]} majorIndices\n * @param {Tick[]} ticks\n * @param {number} ticksLimit\n */\nfunction calculateSpacing(majorIndices, ticks, ticksLimit) {\n  const evenMajorSpacing = getEvenSpacing(majorIndices);\n  const spacing = ticks.length / ticksLimit;\n\n  // If the major ticks are evenly spaced apart, place the minor ticks\n  // so that they divide the major ticks into even chunks\n  if (!evenMajorSpacing) {\n    return Math.max(spacing, 1);\n  }\n\n  const factors = _factorize(evenMajorSpacing);\n  for (let i = 0, ilen = factors.length - 1; i < ilen; i++) {\n    const factor = factors[i];\n    if (factor > spacing) {\n      return factor;\n    }\n  }\n  return Math.max(spacing, 1);\n}\n\n/**\n * @param {Tick[]} ticks\n */\nfunction getMajorIndices(ticks) {\n  const result = [];\n  let i, ilen;\n  for (i = 0, ilen = ticks.length; i < ilen; i++) {\n    if (ticks[i].major) {\n      result.push(i);\n    }\n  }\n  return result;\n}\n\n/**\n * @param {Tick[]} ticks\n * @param {Tick[]} newTicks\n * @param {number[]} majorIndices\n * @param {number} spacing\n */\nfunction skipMajors(ticks, newTicks, majorIndices, spacing) {\n  let count = 0;\n  let next = majorIndices[0];\n  let i;\n\n  spacing = Math.ceil(spacing);\n  for (i = 0; i < ticks.length; i++) {\n    if (i === next) {\n      newTicks.push(ticks[i]);\n      count++;\n      next = majorIndices[count * spacing];\n    }\n  }\n}\n\n/**\n * @param {Tick[]} ticks\n * @param {Tick[]} newTicks\n * @param {number} spacing\n * @param {number} [majorStart]\n * @param {number} [majorEnd]\n */\nfunction skip(ticks, newTicks, spacing, majorStart, majorEnd) {\n  const start = valueOrDefault(majorStart, 0);\n  const end = Math.min(valueOrDefault(majorEnd, ticks.length), ticks.length);\n  let count = 0;\n  let length, i, next;\n\n  spacing = Math.ceil(spacing);\n  if (majorEnd) {\n    length = majorEnd - majorStart;\n    spacing = length / Math.floor(length / spacing);\n  }\n\n  next = start;\n\n  while (next < 0) {\n    count++;\n    next = Math.round(start + count * spacing);\n  }\n\n  for (i = Math.max(start, 0); i < end; i++) {\n    if (i === next) {\n      newTicks.push(ticks[i]);\n      count++;\n      next = Math.round(start + count * spacing);\n    }\n  }\n}\n\n\n/**\n * @param {number[]} arr\n */\nfunction getEvenSpacing(arr) {\n  const len = arr.length;\n  let i, diff;\n\n  if (len < 2) {\n    return false;\n  }\n\n  for (diff = arr[0], i = 1; i < len; ++i) {\n    if (arr[i] - arr[i - 1] !== diff) {\n      return false;\n    }\n  }\n  return diff;\n}\n","import Element from './core.element';\nimport {_alignPixel, _measureText, renderText, clipArea, unclipArea} from '../helpers/helpers.canvas';\nimport {callback as call, each, finiteOrDefault, isArray, isFinite, isNullOrUndef, isObject, valueOrDefault} from '../helpers/helpers.core';\nimport {toDegrees, toRadians, _int16Range, _limitValue, HALF_PI} from '../helpers/helpers.math';\nimport {_alignStartEnd, _toLeftRightCenter} from '../helpers/helpers.extras';\nimport {createContext, toFont, toPadding, _addGrace} from '../helpers/helpers.options';\nimport {autoSkip} from './core.scale.autoskip';\n\nconst reverseAlign = (align) => align === 'left' ? 'right' : align === 'right' ? 'left' : align;\nconst offsetFromEdge = (scale, edge, offset) => edge === 'top' || edge === 'left' ? scale[edge] + offset : scale[edge] - offset;\n\n/**\n * @typedef { import(\"./core.controller\").default } Chart\n * @typedef {{value:number | string, label?:string, major?:boolean, $context?:any}} Tick\n */\n\n/**\n * Returns a new array containing numItems from arr\n * @param {any[]} arr\n * @param {number} numItems\n */\nfunction sample(arr, numItems) {\n  const result = [];\n  const increment = arr.length / numItems;\n  const len = arr.length;\n  let i = 0;\n\n  for (; i < len; i += increment) {\n    result.push(arr[Math.floor(i)]);\n  }\n  return result;\n}\n\n/**\n * @param {Scale} scale\n * @param {number} index\n * @param {boolean} offsetGridLines\n */\nfunction getPixelForGridLine(scale, index, offsetGridLines) {\n  const length = scale.ticks.length;\n  const validIndex = Math.min(index, length - 1);\n  const start = scale._startPixel;\n  const end = scale._endPixel;\n  const epsilon = 1e-6; // 1e-6 is margin in pixels for accumulated error.\n  let lineValue = scale.getPixelForTick(validIndex);\n  let offset;\n\n  if (offsetGridLines) {\n    if (length === 1) {\n      offset = Math.max(lineValue - start, end - lineValue);\n    } else if (index === 0) {\n      offset = (scale.getPixelForTick(1) - lineValue) / 2;\n    } else {\n      offset = (lineValue - scale.getPixelForTick(validIndex - 1)) / 2;\n    }\n    lineValue += validIndex < index ? offset : -offset;\n\n    // Return undefined if the pixel is out of the range\n    if (lineValue < start - epsilon || lineValue > end + epsilon) {\n      return;\n    }\n  }\n  return lineValue;\n}\n\n/**\n * @param {object} caches\n * @param {number} length\n */\nfunction garbageCollect(caches, length) {\n  each(caches, (cache) => {\n    const gc = cache.gc;\n    const gcLen = gc.length / 2;\n    let i;\n    if (gcLen > length) {\n      for (i = 0; i < gcLen; ++i) {\n        delete cache.data[gc[i]];\n      }\n      gc.splice(0, gcLen);\n    }\n  });\n}\n\n/**\n * @param {object} options\n */\nfunction getTickMarkLength(options) {\n  return options.drawTicks ? options.tickLength : 0;\n}\n\n/**\n * @param {object} options\n */\nfunction getTitleHeight(options, fallback) {\n  if (!options.display) {\n    return 0;\n  }\n\n  const font = toFont(options.font, fallback);\n  const padding = toPadding(options.padding);\n  const lines = isArray(options.text) ? options.text.length : 1;\n\n  return (lines * font.lineHeight) + padding.height;\n}\n\nfunction createScaleContext(parent, scale) {\n  return createContext(parent, {\n    scale,\n    type: 'scale'\n  });\n}\n\nfunction createTickContext(parent, index, tick) {\n  return createContext(parent, {\n    tick,\n    index,\n    type: 'tick'\n  });\n}\n\nfunction titleAlign(align, position, reverse) {\n  let ret = _toLeftRightCenter(align);\n  if ((reverse && position !== 'right') || (!reverse && position === 'right')) {\n    ret = reverseAlign(ret);\n  }\n  return ret;\n}\n\nfunction titleArgs(scale, offset, position, align) {\n  const {top, left, bottom, right, chart} = scale;\n  const {chartArea, scales} = chart;\n  let rotation = 0;\n  let maxWidth, titleX, titleY;\n  const height = bottom - top;\n  const width = right - left;\n\n  if (scale.isHorizontal()) {\n    titleX = _alignStartEnd(align, left, right);\n\n    if (isObject(position)) {\n      const positionAxisID = Object.keys(position)[0];\n      const value = position[positionAxisID];\n      titleY = scales[positionAxisID].getPixelForValue(value) + height - offset;\n    } else if (position === 'center') {\n      titleY = (chartArea.bottom + chartArea.top) / 2 + height - offset;\n    } else {\n      titleY = offsetFromEdge(scale, position, offset);\n    }\n    maxWidth = right - left;\n  } else {\n    if (isObject(position)) {\n      const positionAxisID = Object.keys(position)[0];\n      const value = position[positionAxisID];\n      titleX = scales[positionAxisID].getPixelForValue(value) - width + offset;\n    } else if (position === 'center') {\n      titleX = (chartArea.left + chartArea.right) / 2 - width + offset;\n    } else {\n      titleX = offsetFromEdge(scale, position, offset);\n    }\n    titleY = _alignStartEnd(align, bottom, top);\n    rotation = position === 'left' ? -HALF_PI : HALF_PI;\n  }\n  return {titleX, titleY, maxWidth, rotation};\n}\n\nexport default class Scale extends Element {\n\n  // eslint-disable-next-line max-statements\n  constructor(cfg) {\n    super();\n\n    /** @type {string} */\n    this.id = cfg.id;\n    /** @type {string} */\n    this.type = cfg.type;\n    /** @type {any} */\n    this.options = undefined;\n    /** @type {CanvasRenderingContext2D} */\n    this.ctx = cfg.ctx;\n    /** @type {Chart} */\n    this.chart = cfg.chart;\n\n    // implements box\n    /** @type {number} */\n    this.top = undefined;\n    /** @type {number} */\n    this.bottom = undefined;\n    /** @type {number} */\n    this.left = undefined;\n    /** @type {number} */\n    this.right = undefined;\n    /** @type {number} */\n    this.width = undefined;\n    /** @type {number} */\n    this.height = undefined;\n    this._margins = {\n      left: 0,\n      right: 0,\n      top: 0,\n      bottom: 0\n    };\n    /** @type {number} */\n    this.maxWidth = undefined;\n    /** @type {number} */\n    this.maxHeight = undefined;\n    /** @type {number} */\n    this.paddingTop = undefined;\n    /** @type {number} */\n    this.paddingBottom = undefined;\n    /** @type {number} */\n    this.paddingLeft = undefined;\n    /** @type {number} */\n    this.paddingRight = undefined;\n\n    // scale-specific properties\n    /** @type {string=} */\n    this.axis = undefined;\n    /** @type {number=} */\n    this.labelRotation = undefined;\n    this.min = undefined;\n    this.max = undefined;\n    this._range = undefined;\n    /** @type {Tick[]} */\n    this.ticks = [];\n    /** @type {object[]|null} */\n    this._gridLineItems = null;\n    /** @type {object[]|null} */\n    this._labelItems = null;\n    /** @type {object|null} */\n    this._labelSizes = null;\n    this._length = 0;\n    this._maxLength = 0;\n    this._longestTextCache = {};\n    /** @type {number} */\n    this._startPixel = undefined;\n    /** @type {number} */\n    this._endPixel = undefined;\n    this._reversePixels = false;\n    this._userMax = undefined;\n    this._userMin = undefined;\n    this._suggestedMax = undefined;\n    this._suggestedMin = undefined;\n    this._ticksLength = 0;\n    this._borderValue = 0;\n    this._cache = {};\n    this._dataLimitsCached = false;\n    this.$context = undefined;\n  }\n\n  /**\n\t * @param {any} options\n\t * @since 3.0\n\t */\n  init(options) {\n    this.options = options.setContext(this.getContext());\n\n    this.axis = options.axis;\n\n    // parse min/max value, so we can properly determine min/max for other scales\n    this._userMin = this.parse(options.min);\n    this._userMax = this.parse(options.max);\n    this._suggestedMin = this.parse(options.suggestedMin);\n    this._suggestedMax = this.parse(options.suggestedMax);\n  }\n\n  /**\n\t * Parse a supported input value to internal representation.\n\t * @param {*} raw\n\t * @param {number} [index]\n\t * @since 3.0\n\t */\n  parse(raw, index) { // eslint-disable-line no-unused-vars\n    return raw;\n  }\n\n  /**\n\t * @return {{min: number, max: number, minDefined: boolean, maxDefined: boolean}}\n\t * @protected\n\t * @since 3.0\n\t */\n  getUserBounds() {\n    let {_userMin, _userMax, _suggestedMin, _suggestedMax} = this;\n    _userMin = finiteOrDefault(_userMin, Number.POSITIVE_INFINITY);\n    _userMax = finiteOrDefault(_userMax, Number.NEGATIVE_INFINITY);\n    _suggestedMin = finiteOrDefault(_suggestedMin, Number.POSITIVE_INFINITY);\n    _suggestedMax = finiteOrDefault(_suggestedMax, Number.NEGATIVE_INFINITY);\n    return {\n      min: finiteOrDefault(_userMin, _suggestedMin),\n      max: finiteOrDefault(_userMax, _suggestedMax),\n      minDefined: isFinite(_userMin),\n      maxDefined: isFinite(_userMax)\n    };\n  }\n\n  /**\n\t * @param {boolean} canStack\n\t * @return {{min: number, max: number}}\n\t * @protected\n\t * @since 3.0\n\t */\n  getMinMax(canStack) {\n    // eslint-disable-next-line prefer-const\n    let {min, max, minDefined, maxDefined} = this.getUserBounds();\n    let range;\n\n    if (minDefined && maxDefined) {\n      return {min, max};\n    }\n\n    const metas = this.getMatchingVisibleMetas();\n    for (let i = 0, ilen = metas.length; i < ilen; ++i) {\n      range = metas[i].controller.getMinMax(this, canStack);\n      if (!minDefined) {\n        min = Math.min(min, range.min);\n      }\n      if (!maxDefined) {\n        max = Math.max(max, range.max);\n      }\n    }\n\n    // Make sure min <= max when only min or max is defined by user and the data is outside that range\n    min = maxDefined && min > max ? max : min;\n    max = minDefined && min > max ? min : max;\n\n    return {\n      min: finiteOrDefault(min, finiteOrDefault(max, min)),\n      max: finiteOrDefault(max, finiteOrDefault(min, max))\n    };\n  }\n\n  /**\n\t * Get the padding needed for the scale\n\t * @return {{top: number, left: number, bottom: number, right: number}} the necessary padding\n\t * @private\n\t */\n  getPadding() {\n    return {\n      left: this.paddingLeft || 0,\n      top: this.paddingTop || 0,\n      right: this.paddingRight || 0,\n      bottom: this.paddingBottom || 0\n    };\n  }\n\n  /**\n\t * Returns the scale tick objects\n\t * @return {Tick[]}\n\t * @since 2.7\n\t */\n  getTicks() {\n    return this.ticks;\n  }\n\n  /**\n\t * @return {string[]}\n\t */\n  getLabels() {\n    const data = this.chart.data;\n    return this.options.labels || (this.isHorizontal() ? data.xLabels : data.yLabels) || data.labels || [];\n  }\n\n  // When a new layout is created, reset the data limits cache\n  beforeLayout() {\n    this._cache = {};\n    this._dataLimitsCached = false;\n  }\n\n  // These methods are ordered by lifecycle. Utilities then follow.\n  // Any function defined here is inherited by all scale types.\n  // Any function can be extended by the scale type\n\n  beforeUpdate() {\n    call(this.options.beforeUpdate, [this]);\n  }\n\n  /**\n\t * @param {number} maxWidth - the max width in pixels\n\t * @param {number} maxHeight - the max height in pixels\n\t * @param {{top: number, left: number, bottom: number, right: number}} margins - the space between the edge of the other scales and edge of the chart\n\t *   This space comes from two sources:\n\t *     - padding - space that's required to show the labels at the edges of the scale\n\t *     - thickness of scales or legends in another orientation\n\t */\n  update(maxWidth, maxHeight, margins) {\n    const {beginAtZero, grace, ticks: tickOpts} = this.options;\n    const sampleSize = tickOpts.sampleSize;\n\n    // Update Lifecycle - Probably don't want to ever extend or overwrite this function ;)\n    this.beforeUpdate();\n\n    // Absorb the master measurements\n    this.maxWidth = maxWidth;\n    this.maxHeight = maxHeight;\n    this._margins = margins = Object.assign({\n      left: 0,\n      right: 0,\n      top: 0,\n      bottom: 0\n    }, margins);\n\n    this.ticks = null;\n    this._labelSizes = null;\n    this._gridLineItems = null;\n    this._labelItems = null;\n\n    // Dimensions\n    this.beforeSetDimensions();\n    this.setDimensions();\n    this.afterSetDimensions();\n\n    this._maxLength = this.isHorizontal()\n      ? this.width + margins.left + margins.right\n      : this.height + margins.top + margins.bottom;\n\n    // Data min/max\n    if (!this._dataLimitsCached) {\n      this.beforeDataLimits();\n      this.determineDataLimits();\n      this.afterDataLimits();\n      this._range = _addGrace(this, grace, beginAtZero);\n      this._dataLimitsCached = true;\n    }\n\n    this.beforeBuildTicks();\n\n    this.ticks = this.buildTicks() || [];\n\n    // Allow modification of ticks in callback.\n    this.afterBuildTicks();\n\n    // Compute tick rotation and fit using a sampled subset of labels\n    // We generally don't need to compute the size of every single label for determining scale size\n    const samplingEnabled = sampleSize < this.ticks.length;\n    this._convertTicksToLabels(samplingEnabled ? sample(this.ticks, sampleSize) : this.ticks);\n\n    // configure is called twice, once here, once from core.controller.updateLayout.\n    // Here we haven't been positioned yet, but dimensions are correct.\n    // Variables set in configure are needed for calculateLabelRotation, and\n    // it's ok that coordinates are not correct there, only dimensions matter.\n    this.configure();\n\n    // Tick Rotation\n    this.beforeCalculateLabelRotation();\n    this.calculateLabelRotation(); // Preconditions: number of ticks and sizes of largest labels must be calculated beforehand\n    this.afterCalculateLabelRotation();\n\n    // Auto-skip\n    if (tickOpts.display && (tickOpts.autoSkip || tickOpts.source === 'auto')) {\n      this.ticks = autoSkip(this, this.ticks);\n      this._labelSizes = null;\n      this.afterAutoSkip();\n    }\n\n    if (samplingEnabled) {\n      // Generate labels using all non-skipped ticks\n      this._convertTicksToLabels(this.ticks);\n    }\n\n    this.beforeFit();\n    this.fit(); // Preconditions: label rotation and label sizes must be calculated beforehand\n    this.afterFit();\n\n    // IMPORTANT: after this point, we consider that `this.ticks` will NEVER change!\n\n    this.afterUpdate();\n  }\n\n  /**\n\t * @protected\n\t */\n  configure() {\n    let reversePixels = this.options.reverse;\n    let startPixel, endPixel;\n\n    if (this.isHorizontal()) {\n      startPixel = this.left;\n      endPixel = this.right;\n    } else {\n      startPixel = this.top;\n      endPixel = this.bottom;\n      // by default vertical scales are from bottom to top, so pixels are reversed\n      reversePixels = !reversePixels;\n    }\n    this._startPixel = startPixel;\n    this._endPixel = endPixel;\n    this._reversePixels = reversePixels;\n    this._length = endPixel - startPixel;\n    this._alignToPixels = this.options.alignToPixels;\n  }\n\n  afterUpdate() {\n    call(this.options.afterUpdate, [this]);\n  }\n\n  //\n\n  beforeSetDimensions() {\n    call(this.options.beforeSetDimensions, [this]);\n  }\n  setDimensions() {\n    // Set the unconstrained dimension before label rotation\n    if (this.isHorizontal()) {\n      // Reset position before calculating rotation\n      this.width = this.maxWidth;\n      this.left = 0;\n      this.right = this.width;\n    } else {\n      this.height = this.maxHeight;\n\n      // Reset position before calculating rotation\n      this.top = 0;\n      this.bottom = this.height;\n    }\n\n    // Reset padding\n    this.paddingLeft = 0;\n    this.paddingTop = 0;\n    this.paddingRight = 0;\n    this.paddingBottom = 0;\n  }\n  afterSetDimensions() {\n    call(this.options.afterSetDimensions, [this]);\n  }\n\n  _callHooks(name) {\n    this.chart.notifyPlugins(name, this.getContext());\n    call(this.options[name], [this]);\n  }\n\n  // Data limits\n  beforeDataLimits() {\n    this._callHooks('beforeDataLimits');\n  }\n  determineDataLimits() {}\n  afterDataLimits() {\n    this._callHooks('afterDataLimits');\n  }\n\n  //\n  beforeBuildTicks() {\n    this._callHooks('beforeBuildTicks');\n  }\n  /**\n\t * @return {object[]} the ticks\n\t */\n  buildTicks() {\n    return [];\n  }\n  afterBuildTicks() {\n    this._callHooks('afterBuildTicks');\n  }\n\n  beforeTickToLabelConversion() {\n    call(this.options.beforeTickToLabelConversion, [this]);\n  }\n  /**\n\t * Convert ticks to label strings\n\t * @param {Tick[]} ticks\n\t */\n  generateTickLabels(ticks) {\n    const tickOpts = this.options.ticks;\n    let i, ilen, tick;\n    for (i = 0, ilen = ticks.length; i < ilen; i++) {\n      tick = ticks[i];\n      tick.label = call(tickOpts.callback, [tick.value, i, ticks], this);\n    }\n  }\n  afterTickToLabelConversion() {\n    call(this.options.afterTickToLabelConversion, [this]);\n  }\n\n  //\n\n  beforeCalculateLabelRotation() {\n    call(this.options.beforeCalculateLabelRotation, [this]);\n  }\n  calculateLabelRotation() {\n    const options = this.options;\n    const tickOpts = options.ticks;\n    const numTicks = this.ticks.length;\n    const minRotation = tickOpts.minRotation || 0;\n    const maxRotation = tickOpts.maxRotation;\n    let labelRotation = minRotation;\n    let tickWidth, maxHeight, maxLabelDiagonal;\n\n    if (!this._isVisible() || !tickOpts.display || minRotation >= maxRotation || numTicks <= 1 || !this.isHorizontal()) {\n      this.labelRotation = minRotation;\n      return;\n    }\n\n    const labelSizes = this._getLabelSizes();\n    const maxLabelWidth = labelSizes.widest.width;\n    const maxLabelHeight = labelSizes.highest.height;\n\n    // Estimate the width of each grid based on the canvas width, the maximum\n    // label width and the number of tick intervals\n    const maxWidth = _limitValue(this.chart.width - maxLabelWidth, 0, this.maxWidth);\n    tickWidth = options.offset ? this.maxWidth / numTicks : maxWidth / (numTicks - 1);\n\n    // Allow 3 pixels x2 padding either side for label readability\n    if (maxLabelWidth + 6 > tickWidth) {\n      tickWidth = maxWidth / (numTicks - (options.offset ? 0.5 : 1));\n      maxHeight = this.maxHeight - getTickMarkLength(options.grid)\n\t\t\t\t- tickOpts.padding - getTitleHeight(options.title, this.chart.options.font);\n      maxLabelDiagonal = Math.sqrt(maxLabelWidth * maxLabelWidth + maxLabelHeight * maxLabelHeight);\n      labelRotation = toDegrees(Math.min(\n        Math.asin(_limitValue((labelSizes.highest.height + 6) / tickWidth, -1, 1)),\n        Math.asin(_limitValue(maxHeight / maxLabelDiagonal, -1, 1)) - Math.asin(_limitValue(maxLabelHeight / maxLabelDiagonal, -1, 1))\n      ));\n      labelRotation = Math.max(minRotation, Math.min(maxRotation, labelRotation));\n    }\n\n    this.labelRotation = labelRotation;\n  }\n  afterCalculateLabelRotation() {\n    call(this.options.afterCalculateLabelRotation, [this]);\n  }\n  afterAutoSkip() {}\n\n  //\n\n  beforeFit() {\n    call(this.options.beforeFit, [this]);\n  }\n  fit() {\n    // Reset\n    const minSize = {\n      width: 0,\n      height: 0\n    };\n\n    const {chart, options: {ticks: tickOpts, title: titleOpts, grid: gridOpts}} = this;\n    const display = this._isVisible();\n    const isHorizontal = this.isHorizontal();\n\n    if (display) {\n      const titleHeight = getTitleHeight(titleOpts, chart.options.font);\n      if (isHorizontal) {\n        minSize.width = this.maxWidth;\n        minSize.height = getTickMarkLength(gridOpts) + titleHeight;\n      } else {\n        minSize.height = this.maxHeight; // fill all the height\n        minSize.width = getTickMarkLength(gridOpts) + titleHeight;\n      }\n\n      // Don't bother fitting the ticks if we are not showing the labels\n      if (tickOpts.display && this.ticks.length) {\n        const {first, last, widest, highest} = this._getLabelSizes();\n        const tickPadding = tickOpts.padding * 2;\n        const angleRadians = toRadians(this.labelRotation);\n        const cos = Math.cos(angleRadians);\n        const sin = Math.sin(angleRadians);\n\n        if (isHorizontal) {\n        // A horizontal axis is more constrained by the height.\n          const labelHeight = tickOpts.mirror ? 0 : sin * widest.width + cos * highest.height;\n          minSize.height = Math.min(this.maxHeight, minSize.height + labelHeight + tickPadding);\n        } else {\n        // A vertical axis is more constrained by the width. Labels are the\n        // dominant factor here, so get that length first and account for padding\n          const labelWidth = tickOpts.mirror ? 0 : cos * widest.width + sin * highest.height;\n\n          minSize.width = Math.min(this.maxWidth, minSize.width + labelWidth + tickPadding);\n        }\n        this._calculatePadding(first, last, sin, cos);\n      }\n    }\n\n    this._handleMargins();\n\n    if (isHorizontal) {\n      this.width = this._length = chart.width - this._margins.left - this._margins.right;\n      this.height = minSize.height;\n    } else {\n      this.width = minSize.width;\n      this.height = this._length = chart.height - this._margins.top - this._margins.bottom;\n    }\n  }\n\n  _calculatePadding(first, last, sin, cos) {\n    const {ticks: {align, padding}, position} = this.options;\n    const isRotated = this.labelRotation !== 0;\n    const labelsBelowTicks = position !== 'top' && this.axis === 'x';\n\n    if (this.isHorizontal()) {\n      const offsetLeft = this.getPixelForTick(0) - this.left;\n      const offsetRight = this.right - this.getPixelForTick(this.ticks.length - 1);\n      let paddingLeft = 0;\n      let paddingRight = 0;\n\n      // Ensure that our ticks are always inside the canvas. When rotated, ticks are right aligned\n      // which means that the right padding is dominated by the font height\n      if (isRotated) {\n        if (labelsBelowTicks) {\n          paddingLeft = cos * first.width;\n          paddingRight = sin * last.height;\n        } else {\n          paddingLeft = sin * first.height;\n          paddingRight = cos * last.width;\n        }\n      } else if (align === 'start') {\n        paddingRight = last.width;\n      } else if (align === 'end') {\n        paddingLeft = first.width;\n      } else if (align !== 'inner') {\n        paddingLeft = first.width / 2;\n        paddingRight = last.width / 2;\n      }\n\n      // Adjust padding taking into account changes in offsets\n      this.paddingLeft = Math.max((paddingLeft - offsetLeft + padding) * this.width / (this.width - offsetLeft), 0);\n      this.paddingRight = Math.max((paddingRight - offsetRight + padding) * this.width / (this.width - offsetRight), 0);\n    } else {\n      let paddingTop = last.height / 2;\n      let paddingBottom = first.height / 2;\n\n      if (align === 'start') {\n        paddingTop = 0;\n        paddingBottom = first.height;\n      } else if (align === 'end') {\n        paddingTop = last.height;\n        paddingBottom = 0;\n      }\n\n      this.paddingTop = paddingTop + padding;\n      this.paddingBottom = paddingBottom + padding;\n    }\n  }\n\n  /**\n\t * Handle margins and padding interactions\n\t * @private\n\t */\n  _handleMargins() {\n    if (this._margins) {\n      this._margins.left = Math.max(this.paddingLeft, this._margins.left);\n      this._margins.top = Math.max(this.paddingTop, this._margins.top);\n      this._margins.right = Math.max(this.paddingRight, this._margins.right);\n      this._margins.bottom = Math.max(this.paddingBottom, this._margins.bottom);\n    }\n  }\n\n  afterFit() {\n    call(this.options.afterFit, [this]);\n  }\n\n  // Shared Methods\n  /**\n\t * @return {boolean}\n\t */\n  isHorizontal() {\n    const {axis, position} = this.options;\n    return position === 'top' || position === 'bottom' || axis === 'x';\n  }\n  /**\n\t * @return {boolean}\n\t */\n  isFullSize() {\n    return this.options.fullSize;\n  }\n\n  /**\n\t * @param {Tick[]} ticks\n\t * @private\n\t */\n  _convertTicksToLabels(ticks) {\n    this.beforeTickToLabelConversion();\n\n    this.generateTickLabels(ticks);\n\n    // Ticks should be skipped when callback returns null or undef, so lets remove those.\n    let i, ilen;\n    for (i = 0, ilen = ticks.length; i < ilen; i++) {\n      if (isNullOrUndef(ticks[i].label)) {\n        ticks.splice(i, 1);\n        ilen--;\n        i--;\n      }\n    }\n\n    this.afterTickToLabelConversion();\n  }\n\n  /**\n\t * @return {{ first: object, last: object, widest: object, highest: object, widths: Array, heights: array }}\n\t * @private\n\t */\n  _getLabelSizes() {\n    let labelSizes = this._labelSizes;\n\n    if (!labelSizes) {\n      const sampleSize = this.options.ticks.sampleSize;\n      let ticks = this.ticks;\n      if (sampleSize < ticks.length) {\n        ticks = sample(ticks, sampleSize);\n      }\n\n      this._labelSizes = labelSizes = this._computeLabelSizes(ticks, ticks.length);\n    }\n\n    return labelSizes;\n  }\n\n  /**\n\t * Returns {width, height, offset} objects for the first, last, widest, highest tick\n\t * labels where offset indicates the anchor point offset from the top in pixels.\n\t * @return {{ first: object, last: object, widest: object, highest: object, widths: Array, heights: array }}\n\t * @private\n\t */\n  _computeLabelSizes(ticks, length) {\n    const {ctx, _longestTextCache: caches} = this;\n    const widths = [];\n    const heights = [];\n    let widestLabelSize = 0;\n    let highestLabelSize = 0;\n    let i, j, jlen, label, tickFont, fontString, cache, lineHeight, width, height, nestedLabel;\n\n    for (i = 0; i < length; ++i) {\n      label = ticks[i].label;\n      tickFont = this._resolveTickFontOptions(i);\n      ctx.font = fontString = tickFont.string;\n      cache = caches[fontString] = caches[fontString] || {data: {}, gc: []};\n      lineHeight = tickFont.lineHeight;\n      width = height = 0;\n      // Undefined labels and arrays should not be measured\n      if (!isNullOrUndef(label) && !isArray(label)) {\n        width = _measureText(ctx, cache.data, cache.gc, width, label);\n        height = lineHeight;\n      } else if (isArray(label)) {\n        // if it is an array let's measure each element\n        for (j = 0, jlen = label.length; j < jlen; ++j) {\n          nestedLabel = label[j];\n          // Undefined labels and arrays should not be measured\n          if (!isNullOrUndef(nestedLabel) && !isArray(nestedLabel)) {\n            width = _measureText(ctx, cache.data, cache.gc, width, nestedLabel);\n            height += lineHeight;\n          }\n        }\n      }\n      widths.push(width);\n      heights.push(height);\n      widestLabelSize = Math.max(width, widestLabelSize);\n      highestLabelSize = Math.max(height, highestLabelSize);\n    }\n    garbageCollect(caches, length);\n\n    const widest = widths.indexOf(widestLabelSize);\n    const highest = heights.indexOf(highestLabelSize);\n\n    const valueAt = (idx) => ({width: widths[idx] || 0, height: heights[idx] || 0});\n\n    return {\n      first: valueAt(0),\n      last: valueAt(length - 1),\n      widest: valueAt(widest),\n      highest: valueAt(highest),\n      widths,\n      heights,\n    };\n  }\n\n  /**\n\t * Used to get the label to display in the tooltip for the given value\n\t * @param {*} value\n\t * @return {string}\n\t */\n  getLabelForValue(value) {\n    return value;\n  }\n\n  /**\n\t * Returns the location of the given data point. Value can either be an index or a numerical value\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {*} value\n\t * @param {number} [index]\n\t * @return {number}\n\t */\n  getPixelForValue(value, index) { // eslint-disable-line no-unused-vars\n    return NaN;\n  }\n\n  /**\n\t * Used to get the data value from a given pixel. This is the inverse of getPixelForValue\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {number} pixel\n\t * @return {*}\n\t */\n  getValueForPixel(pixel) {} // eslint-disable-line no-unused-vars\n\n  /**\n\t * Returns the location of the tick at the given index\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {number} index\n\t * @return {number}\n\t */\n  getPixelForTick(index) {\n    const ticks = this.ticks;\n    if (index < 0 || index > ticks.length - 1) {\n      return null;\n    }\n    return this.getPixelForValue(ticks[index].value);\n  }\n\n  /**\n\t * Utility for getting the pixel location of a percentage of scale\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @param {number} decimal\n\t * @return {number}\n\t */\n  getPixelForDecimal(decimal) {\n    if (this._reversePixels) {\n      decimal = 1 - decimal;\n    }\n\n    const pixel = this._startPixel + decimal * this._length;\n    return _int16Range(this._alignToPixels ? _alignPixel(this.chart, pixel, 0) : pixel);\n  }\n\n  /**\n\t * @param {number} pixel\n\t * @return {number}\n\t */\n  getDecimalForPixel(pixel) {\n    const decimal = (pixel - this._startPixel) / this._length;\n    return this._reversePixels ? 1 - decimal : decimal;\n  }\n\n  /**\n\t * Returns the pixel for the minimum chart value\n\t * The coordinate (0, 0) is at the upper-left corner of the canvas\n\t * @return {number}\n\t */\n  getBasePixel() {\n    return this.getPixelForValue(this.getBaseValue());\n  }\n\n  /**\n\t * @return {number}\n\t */\n  getBaseValue() {\n    const {min, max} = this;\n\n    return min < 0 && max < 0 ? max :\n      min > 0 && max > 0 ? min :\n      0;\n  }\n\n  /**\n\t * @protected\n\t */\n  getContext(index) {\n    const ticks = this.ticks || [];\n\n    if (index >= 0 && index < ticks.length) {\n      const tick = ticks[index];\n      return tick.$context ||\n\t\t\t\t(tick.$context = createTickContext(this.getContext(), index, tick));\n    }\n    return this.$context ||\n\t\t\t(this.$context = createScaleContext(this.chart.getContext(), this));\n  }\n\n  /**\n\t * @return {number}\n\t * @private\n\t */\n  _tickSize() {\n    const optionTicks = this.options.ticks;\n\n    // Calculate space needed by label in axis direction.\n    const rot = toRadians(this.labelRotation);\n    const cos = Math.abs(Math.cos(rot));\n    const sin = Math.abs(Math.sin(rot));\n\n    const labelSizes = this._getLabelSizes();\n    const padding = optionTicks.autoSkipPadding || 0;\n    const w = labelSizes ? labelSizes.widest.width + padding : 0;\n    const h = labelSizes ? labelSizes.highest.height + padding : 0;\n\n    // Calculate space needed for 1 tick in axis direction.\n    return this.isHorizontal()\n      ? h * cos > w * sin ? w / cos : h / sin\n      : h * sin < w * cos ? h / cos : w / sin;\n  }\n\n  /**\n\t * @return {boolean}\n\t * @private\n\t */\n  _isVisible() {\n    const display = this.options.display;\n\n    if (display !== 'auto') {\n      return !!display;\n    }\n\n    return this.getMatchingVisibleMetas().length > 0;\n  }\n\n  /**\n\t * @private\n\t */\n  _computeGridLineItems(chartArea) {\n    const axis = this.axis;\n    const chart = this.chart;\n    const options = this.options;\n    const {grid, position, border} = options;\n    const offset = grid.offset;\n    const isHorizontal = this.isHorizontal();\n    const ticks = this.ticks;\n    const ticksLength = ticks.length + (offset ? 1 : 0);\n    const tl = getTickMarkLength(grid);\n    const items = [];\n\n    const borderOpts = border.setContext(this.getContext());\n    const axisWidth = borderOpts.display ? borderOpts.width : 0;\n    const axisHalfWidth = axisWidth / 2;\n    const alignBorderValue = function(pixel) {\n      return _alignPixel(chart, pixel, axisWidth);\n    };\n    let borderValue, i, lineValue, alignedLineValue;\n    let tx1, ty1, tx2, ty2, x1, y1, x2, y2;\n\n    if (position === 'top') {\n      borderValue = alignBorderValue(this.bottom);\n      ty1 = this.bottom - tl;\n      ty2 = borderValue - axisHalfWidth;\n      y1 = alignBorderValue(chartArea.top) + axisHalfWidth;\n      y2 = chartArea.bottom;\n    } else if (position === 'bottom') {\n      borderValue = alignBorderValue(this.top);\n      y1 = chartArea.top;\n      y2 = alignBorderValue(chartArea.bottom) - axisHalfWidth;\n      ty1 = borderValue + axisHalfWidth;\n      ty2 = this.top + tl;\n    } else if (position === 'left') {\n      borderValue = alignBorderValue(this.right);\n      tx1 = this.right - tl;\n      tx2 = borderValue - axisHalfWidth;\n      x1 = alignBorderValue(chartArea.left) + axisHalfWidth;\n      x2 = chartArea.right;\n    } else if (position === 'right') {\n      borderValue = alignBorderValue(this.left);\n      x1 = chartArea.left;\n      x2 = alignBorderValue(chartArea.right) - axisHalfWidth;\n      tx1 = borderValue + axisHalfWidth;\n      tx2 = this.left + tl;\n    } else if (axis === 'x') {\n      if (position === 'center') {\n        borderValue = alignBorderValue((chartArea.top + chartArea.bottom) / 2 + 0.5);\n      } else if (isObject(position)) {\n        const positionAxisID = Object.keys(position)[0];\n        const value = position[positionAxisID];\n        borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));\n      }\n\n      y1 = chartArea.top;\n      y2 = chartArea.bottom;\n      ty1 = borderValue + axisHalfWidth;\n      ty2 = ty1 + tl;\n    } else if (axis === 'y') {\n      if (position === 'center') {\n        borderValue = alignBorderValue((chartArea.left + chartArea.right) / 2);\n      } else if (isObject(position)) {\n        const positionAxisID = Object.keys(position)[0];\n        const value = position[positionAxisID];\n        borderValue = alignBorderValue(this.chart.scales[positionAxisID].getPixelForValue(value));\n      }\n\n      tx1 = borderValue - axisHalfWidth;\n      tx2 = tx1 - tl;\n      x1 = chartArea.left;\n      x2 = chartArea.right;\n    }\n\n    const limit = valueOrDefault(options.ticks.maxTicksLimit, ticksLength);\n    const step = Math.max(1, Math.ceil(ticksLength / limit));\n    for (i = 0; i < ticksLength; i += step) {\n      const context = this.getContext(i);\n      const optsAtIndex = grid.setContext(context);\n      const optsAtIndexBorder = border.setContext(context);\n\n      const lineWidth = optsAtIndex.lineWidth;\n      const lineColor = optsAtIndex.color;\n      const borderDash = optsAtIndexBorder.dash || [];\n      const borderDashOffset = optsAtIndexBorder.dashOffset;\n\n      const tickWidth = optsAtIndex.tickWidth;\n      const tickColor = optsAtIndex.tickColor;\n      const tickBorderDash = optsAtIndex.tickBorderDash || [];\n      const tickBorderDashOffset = optsAtIndex.tickBorderDashOffset;\n\n      lineValue = getPixelForGridLine(this, i, offset);\n\n      // Skip if the pixel is out of the range\n      if (lineValue === undefined) {\n        continue;\n      }\n\n      alignedLineValue = _alignPixel(chart, lineValue, lineWidth);\n\n      if (isHorizontal) {\n        tx1 = tx2 = x1 = x2 = alignedLineValue;\n      } else {\n        ty1 = ty2 = y1 = y2 = alignedLineValue;\n      }\n\n      items.push({\n        tx1,\n        ty1,\n        tx2,\n        ty2,\n        x1,\n        y1,\n        x2,\n        y2,\n        width: lineWidth,\n        color: lineColor,\n        borderDash,\n        borderDashOffset,\n        tickWidth,\n        tickColor,\n        tickBorderDash,\n        tickBorderDashOffset,\n      });\n    }\n\n    this._ticksLength = ticksLength;\n    this._borderValue = borderValue;\n\n    return items;\n  }\n\n  /**\n\t * @private\n\t */\n  _computeLabelItems(chartArea) {\n    const axis = this.axis;\n    const options = this.options;\n    const {position, ticks: optionTicks} = options;\n    const isHorizontal = this.isHorizontal();\n    const ticks = this.ticks;\n    const {align, crossAlign, padding, mirror} = optionTicks;\n    const tl = getTickMarkLength(options.grid);\n    const tickAndPadding = tl + padding;\n    const hTickAndPadding = mirror ? -padding : tickAndPadding;\n    const rotation = -toRadians(this.labelRotation);\n    const items = [];\n    let i, ilen, tick, label, x, y, textAlign, pixel, font, lineHeight, lineCount, textOffset;\n    let textBaseline = 'middle';\n\n    if (position === 'top') {\n      y = this.bottom - hTickAndPadding;\n      textAlign = this._getXAxisLabelAlignment();\n    } else if (position === 'bottom') {\n      y = this.top + hTickAndPadding;\n      textAlign = this._getXAxisLabelAlignment();\n    } else if (position === 'left') {\n      const ret = this._getYAxisLabelAlignment(tl);\n      textAlign = ret.textAlign;\n      x = ret.x;\n    } else if (position === 'right') {\n      const ret = this._getYAxisLabelAlignment(tl);\n      textAlign = ret.textAlign;\n      x = ret.x;\n    } else if (axis === 'x') {\n      if (position === 'center') {\n        y = ((chartArea.top + chartArea.bottom) / 2) + tickAndPadding;\n      } else if (isObject(position)) {\n        const positionAxisID = Object.keys(position)[0];\n        const value = position[positionAxisID];\n        y = this.chart.scales[positionAxisID].getPixelForValue(value) + tickAndPadding;\n      }\n      textAlign = this._getXAxisLabelAlignment();\n    } else if (axis === 'y') {\n      if (position === 'center') {\n        x = ((chartArea.left + chartArea.right) / 2) - tickAndPadding;\n      } else if (isObject(position)) {\n        const positionAxisID = Object.keys(position)[0];\n        const value = position[positionAxisID];\n        x = this.chart.scales[positionAxisID].getPixelForValue(value);\n      }\n      textAlign = this._getYAxisLabelAlignment(tl).textAlign;\n    }\n\n    if (axis === 'y') {\n      if (align === 'start') {\n        textBaseline = 'top';\n      } else if (align === 'end') {\n        textBaseline = 'bottom';\n      }\n    }\n\n    const labelSizes = this._getLabelSizes();\n    for (i = 0, ilen = ticks.length; i < ilen; ++i) {\n      tick = ticks[i];\n      label = tick.label;\n\n      const optsAtIndex = optionTicks.setContext(this.getContext(i));\n      pixel = this.getPixelForTick(i) + optionTicks.labelOffset;\n      font = this._resolveTickFontOptions(i);\n      lineHeight = font.lineHeight;\n      lineCount = isArray(label) ? label.length : 1;\n      const halfCount = lineCount / 2;\n      const color = optsAtIndex.color;\n      const strokeColor = optsAtIndex.textStrokeColor;\n      const strokeWidth = optsAtIndex.textStrokeWidth;\n      let tickTextAlign = textAlign;\n\n      if (isHorizontal) {\n        x = pixel;\n\n        if (textAlign === 'inner') {\n          if (i === ilen - 1) {\n            tickTextAlign = !this.options.reverse ? 'right' : 'left';\n          } else if (i === 0) {\n            tickTextAlign = !this.options.reverse ? 'left' : 'right';\n          } else {\n            tickTextAlign = 'center';\n          }\n        }\n\n        if (position === 'top') {\n          if (crossAlign === 'near' || rotation !== 0) {\n            textOffset = -lineCount * lineHeight + lineHeight / 2;\n          } else if (crossAlign === 'center') {\n            textOffset = -labelSizes.highest.height / 2 - halfCount * lineHeight + lineHeight;\n          } else {\n            textOffset = -labelSizes.highest.height + lineHeight / 2;\n          }\n        } else {\n          // eslint-disable-next-line no-lonely-if\n          if (crossAlign === 'near' || rotation !== 0) {\n            textOffset = lineHeight / 2;\n          } else if (crossAlign === 'center') {\n            textOffset = labelSizes.highest.height / 2 - halfCount * lineHeight;\n          } else {\n            textOffset = labelSizes.highest.height - lineCount * lineHeight;\n          }\n        }\n        if (mirror) {\n          textOffset *= -1;\n        }\n        if (rotation !== 0 && !optsAtIndex.showLabelBackdrop) {\n          x += (lineHeight / 2) * Math.sin(rotation);\n        }\n      } else {\n        y = pixel;\n        textOffset = (1 - lineCount) * lineHeight / 2;\n      }\n\n      let backdrop;\n\n      if (optsAtIndex.showLabelBackdrop) {\n        const labelPadding = toPadding(optsAtIndex.backdropPadding);\n        const height = labelSizes.heights[i];\n        const width = labelSizes.widths[i];\n\n        let top = textOffset - labelPadding.top;\n        let left = 0 - labelPadding.left;\n\n        switch (textBaseline) {\n        case 'middle':\n          top -= height / 2;\n          break;\n        case 'bottom':\n          top -= height;\n          break;\n        default:\n          break;\n        }\n\n        switch (textAlign) {\n        case 'center':\n          left -= width / 2;\n          break;\n        case 'right':\n          left -= width;\n          break;\n        default:\n          break;\n        }\n\n        backdrop = {\n          left,\n          top,\n          width: width + labelPadding.width,\n          height: height + labelPadding.height,\n\n          color: optsAtIndex.backdropColor,\n        };\n      }\n\n      items.push({\n        rotation,\n        label,\n        font,\n        color,\n        strokeColor,\n        strokeWidth,\n        textOffset,\n        textAlign: tickTextAlign,\n        textBaseline,\n        translation: [x, y],\n        backdrop,\n      });\n    }\n\n    return items;\n  }\n\n  _getXAxisLabelAlignment() {\n    const {position, ticks} = this.options;\n    const rotation = -toRadians(this.labelRotation);\n\n    if (rotation) {\n      return position === 'top' ? 'left' : 'right';\n    }\n\n    let align = 'center';\n\n    if (ticks.align === 'start') {\n      align = 'left';\n    } else if (ticks.align === 'end') {\n      align = 'right';\n    } else if (ticks.align === 'inner') {\n      align = 'inner';\n    }\n\n    return align;\n  }\n\n  _getYAxisLabelAlignment(tl) {\n    const {position, ticks: {crossAlign, mirror, padding}} = this.options;\n    const labelSizes = this._getLabelSizes();\n    const tickAndPadding = tl + padding;\n    const widest = labelSizes.widest.width;\n\n    let textAlign;\n    let x;\n\n    if (position === 'left') {\n      if (mirror) {\n        x = this.right + padding;\n\n        if (crossAlign === 'near') {\n          textAlign = 'left';\n        } else if (crossAlign === 'center') {\n          textAlign = 'center';\n          x += (widest / 2);\n        } else {\n          textAlign = 'right';\n          x += widest;\n        }\n      } else {\n        x = this.right - tickAndPadding;\n\n        if (crossAlign === 'near') {\n          textAlign = 'right';\n        } else if (crossAlign === 'center') {\n          textAlign = 'center';\n          x -= (widest / 2);\n        } else {\n          textAlign = 'left';\n          x = this.left;\n        }\n      }\n    } else if (position === 'right') {\n      if (mirror) {\n        x = this.left + padding;\n\n        if (crossAlign === 'near') {\n          textAlign = 'right';\n        } else if (crossAlign === 'center') {\n          textAlign = 'center';\n          x -= (widest / 2);\n        } else {\n          textAlign = 'left';\n          x -= widest;\n        }\n      } else {\n        x = this.left + tickAndPadding;\n\n        if (crossAlign === 'near') {\n          textAlign = 'left';\n        } else if (crossAlign === 'center') {\n          textAlign = 'center';\n          x += widest / 2;\n        } else {\n          textAlign = 'right';\n          x = this.right;\n        }\n      }\n    } else {\n      textAlign = 'right';\n    }\n\n    return {textAlign, x};\n  }\n\n  /**\n\t * @private\n\t */\n  _computeLabelArea() {\n    if (this.options.ticks.mirror) {\n      return;\n    }\n\n    const chart = this.chart;\n    const position = this.options.position;\n\n    if (position === 'left' || position === 'right') {\n      return {top: 0, left: this.left, bottom: chart.height, right: this.right};\n    } if (position === 'top' || position === 'bottom') {\n      return {top: this.top, left: 0, bottom: this.bottom, right: chart.width};\n    }\n  }\n\n  /**\n   * @protected\n   */\n  drawBackground() {\n    const {ctx, options: {backgroundColor}, left, top, width, height} = this;\n    if (backgroundColor) {\n      ctx.save();\n      ctx.fillStyle = backgroundColor;\n      ctx.fillRect(left, top, width, height);\n      ctx.restore();\n    }\n  }\n\n  getLineWidthForValue(value) {\n    const grid = this.options.grid;\n    if (!this._isVisible() || !grid.display) {\n      return 0;\n    }\n    const ticks = this.ticks;\n    const index = ticks.findIndex(t => t.value === value);\n    if (index >= 0) {\n      const opts = grid.setContext(this.getContext(index));\n      return opts.lineWidth;\n    }\n    return 0;\n  }\n\n  /**\n\t * @protected\n\t */\n  drawGrid(chartArea) {\n    const grid = this.options.grid;\n    const ctx = this.ctx;\n    const items = this._gridLineItems || (this._gridLineItems = this._computeGridLineItems(chartArea));\n    let i, ilen;\n\n    const drawLine = (p1, p2, style) => {\n      if (!style.width || !style.color) {\n        return;\n      }\n      ctx.save();\n      ctx.lineWidth = style.width;\n      ctx.strokeStyle = style.color;\n      ctx.setLineDash(style.borderDash || []);\n      ctx.lineDashOffset = style.borderDashOffset;\n\n      ctx.beginPath();\n      ctx.moveTo(p1.x, p1.y);\n      ctx.lineTo(p2.x, p2.y);\n      ctx.stroke();\n      ctx.restore();\n    };\n\n    if (grid.display) {\n      for (i = 0, ilen = items.length; i < ilen; ++i) {\n        const item = items[i];\n\n        if (grid.drawOnChartArea) {\n          drawLine(\n            {x: item.x1, y: item.y1},\n            {x: item.x2, y: item.y2},\n            item\n          );\n        }\n\n        if (grid.drawTicks) {\n          drawLine(\n            {x: item.tx1, y: item.ty1},\n            {x: item.tx2, y: item.ty2},\n            {\n              color: item.tickColor,\n              width: item.tickWidth,\n              borderDash: item.tickBorderDash,\n              borderDashOffset: item.tickBorderDashOffset\n            }\n          );\n        }\n      }\n    }\n  }\n\n  /**\n\t * @protected\n\t */\n  drawBorder() {\n    const {chart, ctx, options: {border, grid}} = this;\n    const borderOpts = border.setContext(this.getContext());\n    const axisWidth = border.display ? borderOpts.width : 0;\n    if (!axisWidth) {\n      return;\n    }\n    const lastLineWidth = grid.setContext(this.getContext(0)).lineWidth;\n    const borderValue = this._borderValue;\n    let x1, x2, y1, y2;\n\n    if (this.isHorizontal()) {\n      x1 = _alignPixel(chart, this.left, axisWidth) - axisWidth / 2;\n      x2 = _alignPixel(chart, this.right, lastLineWidth) + lastLineWidth / 2;\n      y1 = y2 = borderValue;\n    } else {\n      y1 = _alignPixel(chart, this.top, axisWidth) - axisWidth / 2;\n      y2 = _alignPixel(chart, this.bottom, lastLineWidth) + lastLineWidth / 2;\n      x1 = x2 = borderValue;\n    }\n    ctx.save();\n    ctx.lineWidth = borderOpts.width;\n    ctx.strokeStyle = borderOpts.color;\n\n    ctx.beginPath();\n    ctx.moveTo(x1, y1);\n    ctx.lineTo(x2, y2);\n    ctx.stroke();\n\n    ctx.restore();\n  }\n\n  /**\n\t * @protected\n\t */\n  drawLabels(chartArea) {\n    const optionTicks = this.options.ticks;\n\n    if (!optionTicks.display) {\n      return;\n    }\n\n    const ctx = this.ctx;\n\n    const area = this._computeLabelArea();\n    if (area) {\n      clipArea(ctx, area);\n    }\n\n    const items = this._labelItems || (this._labelItems = this._computeLabelItems(chartArea));\n    let i, ilen;\n\n    for (i = 0, ilen = items.length; i < ilen; ++i) {\n      const item = items[i];\n      const tickFont = item.font;\n      const label = item.label;\n\n      let y = item.textOffset;\n      renderText(ctx, label, 0, y, tickFont, item);\n    }\n\n    if (area) {\n      unclipArea(ctx);\n    }\n  }\n\n  /**\n\t * @protected\n\t */\n  drawTitle() {\n    const {ctx, options: {position, title, reverse}} = this;\n\n    if (!title.display) {\n      return;\n    }\n\n    const font = toFont(title.font);\n    const padding = toPadding(title.padding);\n    const align = title.align;\n    let offset = font.lineHeight / 2;\n\n    if (position === 'bottom' || position === 'center' || isObject(position)) {\n      offset += padding.bottom;\n      if (isArray(title.text)) {\n        offset += font.lineHeight * (title.text.length - 1);\n      }\n    } else {\n      offset += padding.top;\n    }\n\n    const {titleX, titleY, maxWidth, rotation} = titleArgs(this, offset, position, align);\n\n    renderText(ctx, title.text, 0, 0, font, {\n      color: title.color,\n      maxWidth,\n      rotation,\n      textAlign: titleAlign(align, position, reverse),\n      textBaseline: 'middle',\n      translation: [titleX, titleY],\n    });\n  }\n\n  draw(chartArea) {\n    if (!this._isVisible()) {\n      return;\n    }\n\n    this.drawBackground();\n    this.drawGrid(chartArea);\n    this.drawBorder();\n    this.drawTitle();\n    this.drawLabels(chartArea);\n  }\n\n  /**\n\t * @return {object[]}\n\t * @private\n\t */\n  _layers() {\n    const opts = this.options;\n    const tz = opts.ticks && opts.ticks.z || 0;\n    const gz = valueOrDefault(opts.grid && opts.grid.z, -1);\n    const bz = valueOrDefault(opts.border && opts.border.z, 0);\n\n    if (!this._isVisible() || this.draw !== Scale.prototype.draw) {\n      // backward compatibility: draw has been overridden by custom scale\n      return [{\n        z: tz,\n        draw: (chartArea) => {\n          this.draw(chartArea);\n        }\n      }];\n    }\n\n    return [{\n      z: gz,\n      draw: (chartArea) => {\n        this.drawBackground();\n        this.drawGrid(chartArea);\n        this.drawTitle();\n      }\n    }, {\n      z: bz,\n      draw: () => {\n        this.drawBorder();\n      }\n    }, {\n      z: tz,\n      draw: (chartArea) => {\n        this.drawLabels(chartArea);\n      }\n    }];\n  }\n\n  /**\n\t * Returns visible dataset metas that are attached to this scale\n\t * @param {string} [type] - if specified, also filter by dataset type\n\t * @return {object[]}\n\t */\n  getMatchingVisibleMetas(type) {\n    const metas = this.chart.getSortedVisibleDatasetMetas();\n    const axisID = this.axis + 'AxisID';\n    const result = [];\n    let i, ilen;\n\n    for (i = 0, ilen = metas.length; i < ilen; ++i) {\n      const meta = metas[i];\n      if (meta[axisID] === this.id && (!type || meta.type === type)) {\n        result.push(meta);\n      }\n    }\n    return result;\n  }\n\n  /**\n\t * @param {number} index\n\t * @return {object}\n\t * @protected\n \t */\n  _resolveTickFontOptions(index) {\n    const opts = this.options.ticks.setContext(this.getContext(index));\n    return toFont(opts.font);\n  }\n\n  /**\n   * @protected\n   */\n  _maxDigits() {\n    const fontSize = this._resolveTickFontOptions(0).lineHeight;\n    return (this.isHorizontal() ? this.width : this.height) / fontSize;\n  }\n}\n","import {merge} from '../helpers';\nimport defaults, {overrides} from './core.defaults';\n\n/**\n * @typedef {{id: string, defaults: any, overrides?: any, defaultRoutes: any}} IChartComponent\n */\n\nexport default class TypedRegistry {\n  constructor(type, scope, override) {\n    this.type = type;\n    this.scope = scope;\n    this.override = override;\n    this.items = Object.create(null);\n  }\n\n  isForType(type) {\n    return Object.prototype.isPrototypeOf.call(this.type.prototype, type.prototype);\n  }\n\n  /**\n\t * @param {IChartComponent} item\n\t * @returns {string} The scope where items defaults were registered to.\n\t */\n  register(item) {\n    const proto = Object.getPrototypeOf(item);\n    let parentScope;\n\n    if (isIChartComponent(proto)) {\n      // Make sure the parent is registered and note the scope where its defaults are.\n      parentScope = this.register(proto);\n    }\n\n    const items = this.items;\n    const id = item.id;\n    const scope = this.scope + '.' + id;\n\n    if (!id) {\n      throw new Error('class does not have id: ' + item);\n    }\n\n    if (id in items) {\n      // already registered\n      return scope;\n    }\n\n    items[id] = item;\n    registerDefaults(item, scope, parentScope);\n    if (this.override) {\n      defaults.override(item.id, item.overrides);\n    }\n\n    return scope;\n  }\n\n  /**\n\t * @param {string} id\n\t * @returns {object?}\n\t */\n  get(id) {\n    return this.items[id];\n  }\n\n  /**\n\t * @param {IChartComponent} item\n\t */\n  unregister(item) {\n    const items = this.items;\n    const id = item.id;\n    const scope = this.scope;\n\n    if (id in items) {\n      delete items[id];\n    }\n\n    if (scope && id in defaults[scope]) {\n      delete defaults[scope][id];\n      if (this.override) {\n        delete overrides[id];\n      }\n    }\n  }\n}\n\nfunction registerDefaults(item, scope, parentScope) {\n  // Inherit the parent's defaults and keep existing defaults\n  const itemDefaults = merge(Object.create(null), [\n    parentScope ? defaults.get(parentScope) : {},\n    defaults.get(scope),\n    item.defaults\n  ]);\n\n  defaults.set(scope, itemDefaults);\n\n  if (item.defaultRoutes) {\n    routeDefaults(scope, item.defaultRoutes);\n  }\n\n  if (item.descriptors) {\n    defaults.describe(scope, item.descriptors);\n  }\n}\n\nfunction routeDefaults(scope, routes) {\n  Object.keys(routes).forEach(property => {\n    const propertyParts = property.split('.');\n    const sourceName = propertyParts.pop();\n    const sourceScope = [scope].concat(propertyParts).join('.');\n    const parts = routes[property].split('.');\n    const targetName = parts.pop();\n    const targetScope = parts.join('.');\n    defaults.route(sourceScope, sourceName, targetScope, targetName);\n  });\n}\n\nfunction isIChartComponent(proto) {\n  return 'id' in proto && 'defaults' in proto;\n}\n","import DatasetController from './core.datasetController';\nimport Element from './core.element';\nimport Scale from './core.scale';\nimport TypedRegistry from './core.typedRegistry';\nimport {each, callback as call, _capitalize} from '../helpers/helpers.core';\n\n/**\n * Please use the module's default export which provides a singleton instance\n * Note: class is exported for typedoc\n */\nexport class Registry {\n  constructor() {\n    this.controllers = new TypedRegistry(DatasetController, 'datasets', true);\n    this.elements = new TypedRegistry(Element, 'elements');\n    this.plugins = new TypedRegistry(Object, 'plugins');\n    this.scales = new TypedRegistry(Scale, 'scales');\n    // Order is important, Scale has Element in prototype chain,\n    // so Scales must be before Elements. Plugins are a fallback, so not listed here.\n    this._typedRegistries = [this.controllers, this.scales, this.elements];\n  }\n\n  /**\n\t * @param  {...any} args\n\t */\n  add(...args) {\n    this._each('register', args);\n  }\n\n  remove(...args) {\n    this._each('unregister', args);\n  }\n\n  /**\n\t * @param  {...typeof DatasetController} args\n\t */\n  addControllers(...args) {\n    this._each('register', args, this.controllers);\n  }\n\n  /**\n\t * @param  {...typeof Element} args\n\t */\n  addElements(...args) {\n    this._each('register', args, this.elements);\n  }\n\n  /**\n\t * @param  {...any} args\n\t */\n  addPlugins(...args) {\n    this._each('register', args, this.plugins);\n  }\n\n  /**\n\t * @param  {...typeof Scale} args\n\t */\n  addScales(...args) {\n    this._each('register', args, this.scales);\n  }\n\n  /**\n\t * @param {string} id\n\t * @returns {typeof DatasetController}\n\t */\n  getController(id) {\n    return this._get(id, this.controllers, 'controller');\n  }\n\n  /**\n\t * @param {string} id\n\t * @returns {typeof Element}\n\t */\n  getElement(id) {\n    return this._get(id, this.elements, 'element');\n  }\n\n  /**\n\t * @param {string} id\n\t * @returns {object}\n\t */\n  getPlugin(id) {\n    return this._get(id, this.plugins, 'plugin');\n  }\n\n  /**\n\t * @param {string} id\n\t * @returns {typeof Scale}\n\t */\n  getScale(id) {\n    return this._get(id, this.scales, 'scale');\n  }\n\n  /**\n\t * @param  {...typeof DatasetController} args\n\t */\n  removeControllers(...args) {\n    this._each('unregister', args, this.controllers);\n  }\n\n  /**\n\t * @param  {...typeof Element} args\n\t */\n  removeElements(...args) {\n    this._each('unregister', args, this.elements);\n  }\n\n  /**\n\t * @param  {...any} args\n\t */\n  removePlugins(...args) {\n    this._each('unregister', args, this.plugins);\n  }\n\n  /**\n\t * @param  {...typeof Scale} args\n\t */\n  removeScales(...args) {\n    this._each('unregister', args, this.scales);\n  }\n\n  /**\n\t * @private\n\t */\n  _each(method, args, typedRegistry) {\n    [...args].forEach(arg => {\n      const reg = typedRegistry || this._getRegistryForType(arg);\n      if (typedRegistry || reg.isForType(arg) || (reg === this.plugins && arg.id)) {\n        this._exec(method, reg, arg);\n      } else {\n        // Handle loopable args\n        // Use case:\n        //  import * as plugins from './plugins';\n        //  Chart.register(plugins);\n        each(arg, item => {\n          // If there are mixed types in the loopable, make sure those are\n          // registered in correct registry\n          // Use case: (treemap exporting controller, elements etc)\n          //  import * as treemap from 'chartjs-chart-treemap';\n          //  Chart.register(treemap);\n\n          const itemReg = typedRegistry || this._getRegistryForType(item);\n          this._exec(method, itemReg, item);\n        });\n      }\n    });\n  }\n\n  /**\n\t * @private\n\t */\n  _exec(method, registry, component) {\n    const camelMethod = _capitalize(method);\n    call(component['before' + camelMethod], [], component); // beforeRegister / beforeUnregister\n    registry[method](component);\n    call(component['after' + camelMethod], [], component); // afterRegister / afterUnregister\n  }\n\n  /**\n\t * @private\n\t */\n  _getRegistryForType(type) {\n    for (let i = 0; i < this._typedRegistries.length; i++) {\n      const reg = this._typedRegistries[i];\n      if (reg.isForType(type)) {\n        return reg;\n      }\n    }\n    // plugins is the fallback registry\n    return this.plugins;\n  }\n\n  /**\n\t * @private\n\t */\n  _get(id, typedRegistry, type) {\n    const item = typedRegistry.get(id);\n    if (item === undefined) {\n      throw new Error('\"' + id + '\" is not a registered ' + type + '.');\n    }\n    return item;\n  }\n\n}\n\n// singleton instance\nexport default /* #__PURE__ */ new Registry();\n","import registry from './core.registry';\nimport {callback as callCallback, isNullOrUndef, valueOrDefault} from '../helpers/helpers.core';\n\n/**\n * @typedef { import(\"./core.controller\").default } Chart\n * @typedef { import(\"../../types\").ChartEvent } ChartEvent\n * @typedef { import(\"../plugins/plugin.tooltip\").default } Tooltip\n */\n\n/**\n * @callback filterCallback\n * @param {{plugin: object, options: object}} value\n * @param {number} [index]\n * @param {array} [array]\n * @param {object} [thisArg]\n * @return {boolean}\n */\n\n\nexport default class PluginService {\n  constructor() {\n    this._init = [];\n  }\n\n  /**\n\t * Calls enabled plugins for `chart` on the specified hook and with the given args.\n\t * This method immediately returns as soon as a plugin explicitly returns false. The\n\t * returned value can be used, for instance, to interrupt the current action.\n\t * @param {Chart} chart - The chart instance for which plugins should be called.\n\t * @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate').\n\t * @param {object} [args] - Extra arguments to apply to the hook call.\n   * @param {filterCallback} [filter] - Filtering function for limiting which plugins are notified\n\t * @returns {boolean} false if any of the plugins return false, else returns true.\n\t */\n  notify(chart, hook, args, filter) {\n    if (hook === 'beforeInit') {\n      this._init = this._createDescriptors(chart, true);\n      this._notify(this._init, chart, 'install');\n    }\n\n    const descriptors = filter ? this._descriptors(chart).filter(filter) : this._descriptors(chart);\n    const result = this._notify(descriptors, chart, hook, args);\n\n    if (hook === 'afterDestroy') {\n      this._notify(descriptors, chart, 'stop');\n      this._notify(this._init, chart, 'uninstall');\n    }\n    return result;\n  }\n\n  /**\n\t * @private\n\t */\n  _notify(descriptors, chart, hook, args) {\n    args = args || {};\n    for (const descriptor of descriptors) {\n      const plugin = descriptor.plugin;\n      const method = plugin[hook];\n      const params = [chart, args, descriptor.options];\n      if (callCallback(method, params, plugin) === false && args.cancelable) {\n        return false;\n      }\n    }\n\n    return true;\n  }\n\n  invalidate() {\n    // When plugins are registered, there is the possibility of a double\n    // invalidate situation. In this case, we only want to invalidate once.\n    // If we invalidate multiple times, the `_oldCache` is lost and all of the\n    // plugins are restarted without being correctly stopped.\n    // See https://github.com/chartjs/Chart.js/issues/8147\n    if (!isNullOrUndef(this._cache)) {\n      this._oldCache = this._cache;\n      this._cache = undefined;\n    }\n  }\n\n  /**\n\t * @param {Chart} chart\n\t * @private\n\t */\n  _descriptors(chart) {\n    if (this._cache) {\n      return this._cache;\n    }\n\n    const descriptors = this._cache = this._createDescriptors(chart);\n\n    this._notifyStateChanges(chart);\n\n    return descriptors;\n  }\n\n  _createDescriptors(chart, all) {\n    const config = chart && chart.config;\n    const options = valueOrDefault(config.options && config.options.plugins, {});\n    const plugins = allPlugins(config);\n    // options === false => all plugins are disabled\n    return options === false && !all ? [] : createDescriptors(chart, plugins, options, all);\n  }\n\n  /**\n\t * @param {Chart} chart\n\t * @private\n\t */\n  _notifyStateChanges(chart) {\n    const previousDescriptors = this._oldCache || [];\n    const descriptors = this._cache;\n    const diff = (a, b) => a.filter(x => !b.some(y => x.plugin.id === y.plugin.id));\n    this._notify(diff(previousDescriptors, descriptors), chart, 'stop');\n    this._notify(diff(descriptors, previousDescriptors), chart, 'start');\n  }\n}\n\n/**\n * @param {import(\"./core.config\").default} config\n */\nfunction allPlugins(config) {\n  const localIds = {};\n  const plugins = [];\n  const keys = Object.keys(registry.plugins.items);\n  for (let i = 0; i < keys.length; i++) {\n    plugins.push(registry.getPlugin(keys[i]));\n  }\n\n  const local = config.plugins || [];\n  for (let i = 0; i < local.length; i++) {\n    const plugin = local[i];\n\n    if (plugins.indexOf(plugin) === -1) {\n      plugins.push(plugin);\n      localIds[plugin.id] = true;\n    }\n  }\n\n  return {plugins, localIds};\n}\n\nfunction getOpts(options, all) {\n  if (!all && options === false) {\n    return null;\n  }\n  if (options === true) {\n    return {};\n  }\n  return options;\n}\n\nfunction createDescriptors(chart, {plugins, localIds}, options, all) {\n  const result = [];\n  const context = chart.getContext();\n\n  for (const plugin of plugins) {\n    const id = plugin.id;\n    const opts = getOpts(options[id], all);\n    if (opts === null) {\n      continue;\n    }\n    result.push({\n      plugin,\n      options: pluginOpts(chart.config, {plugin, local: localIds[id]}, opts, context)\n    });\n  }\n\n  return result;\n}\n\nfunction pluginOpts(config, {plugin, local}, opts, context) {\n  const keys = config.pluginScopeKeys(plugin);\n  const scopes = config.getOptionScopes(opts, keys);\n  if (local && plugin.defaults) {\n    // make sure plugin defaults are in scopes for local (not registered) plugins\n    scopes.push(plugin.defaults);\n  }\n  return config.createResolver(scopes, context, [''], {\n    // These are just defaults that plugins can override\n    scriptable: false,\n    indexable: false,\n    allKeys: true\n  });\n}\n","import defaults, {overrides, descriptors} from './core.defaults';\nimport {mergeIf, resolveObjectKey, isArray, isFunction, valueOrDefault, isObject} from '../helpers/helpers.core';\nimport {_attachContext, _createResolver, _descriptors} from '../helpers/helpers.config';\n\nexport function getIndexAxis(type, options) {\n  const datasetDefaults = defaults.datasets[type] || {};\n  const datasetOptions = (options.datasets || {})[type] || {};\n  return datasetOptions.indexAxis || options.indexAxis || datasetDefaults.indexAxis || 'x';\n}\n\nfunction getAxisFromDefaultScaleID(id, indexAxis) {\n  let axis = id;\n  if (id === '_index_') {\n    axis = indexAxis;\n  } else if (id === '_value_') {\n    axis = indexAxis === 'x' ? 'y' : 'x';\n  }\n  return axis;\n}\n\nfunction getDefaultScaleIDFromAxis(axis, indexAxis) {\n  return axis === indexAxis ? '_index_' : '_value_';\n}\n\nfunction axisFromPosition(position) {\n  if (position === 'top' || position === 'bottom') {\n    return 'x';\n  }\n  if (position === 'left' || position === 'right') {\n    return 'y';\n  }\n}\n\nexport function determineAxis(id, scaleOptions) {\n  if (id === 'x' || id === 'y' || id === 'r') {\n    return id;\n  }\n\n  id = scaleOptions.axis\n    || axisFromPosition(scaleOptions.position)\n    || id.length > 1 && determineAxis(id[0].toLowerCase(), scaleOptions);\n\n  if (id) {\n    return id;\n  }\n\n  throw new Error(`Cannot determine type of '${name}' axis. Please provide 'axis' or 'position' option.`);\n}\n\nfunction mergeScaleConfig(config, options) {\n  const chartDefaults = overrides[config.type] || {scales: {}};\n  const configScales = options.scales || {};\n  const chartIndexAxis = getIndexAxis(config.type, options);\n  const scales = Object.create(null);\n\n  // First figure out first scale id's per axis.\n  Object.keys(configScales).forEach(id => {\n    const scaleConf = configScales[id];\n    if (!isObject(scaleConf)) {\n      return console.error(`Invalid scale configuration for scale: ${id}`);\n    }\n    if (scaleConf._proxy) {\n      return console.warn(`Ignoring resolver passed as options for scale: ${id}`);\n    }\n    const axis = determineAxis(id, scaleConf);\n    const defaultId = getDefaultScaleIDFromAxis(axis, chartIndexAxis);\n    const defaultScaleOptions = chartDefaults.scales || {};\n    scales[id] = mergeIf(Object.create(null), [{axis}, scaleConf, defaultScaleOptions[axis], defaultScaleOptions[defaultId]]);\n  });\n\n  // Then merge dataset defaults to scale configs\n  config.data.datasets.forEach(dataset => {\n    const type = dataset.type || config.type;\n    const indexAxis = dataset.indexAxis || getIndexAxis(type, options);\n    const datasetDefaults = overrides[type] || {};\n    const defaultScaleOptions = datasetDefaults.scales || {};\n    Object.keys(defaultScaleOptions).forEach(defaultID => {\n      const axis = getAxisFromDefaultScaleID(defaultID, indexAxis);\n      const id = dataset[axis + 'AxisID'] || axis;\n      scales[id] = scales[id] || Object.create(null);\n      mergeIf(scales[id], [{axis}, configScales[id], defaultScaleOptions[defaultID]]);\n    });\n  });\n\n  // apply scale defaults, if not overridden by dataset defaults\n  Object.keys(scales).forEach(key => {\n    const scale = scales[key];\n    mergeIf(scale, [defaults.scales[scale.type], defaults.scale]);\n  });\n\n  return scales;\n}\n\nfunction initOptions(config) {\n  const options = config.options || (config.options = {});\n\n  options.plugins = valueOrDefault(options.plugins, {});\n  options.scales = mergeScaleConfig(config, options);\n}\n\nfunction initData(data) {\n  data = data || {};\n  data.datasets = data.datasets || [];\n  data.labels = data.labels || [];\n  return data;\n}\n\nfunction initConfig(config) {\n  config = config || {};\n  config.data = initData(config.data);\n\n  initOptions(config);\n\n  return config;\n}\n\nconst keyCache = new Map();\nconst keysCached = new Set();\n\nfunction cachedKeys(cacheKey, generate) {\n  let keys = keyCache.get(cacheKey);\n  if (!keys) {\n    keys = generate();\n    keyCache.set(cacheKey, keys);\n    keysCached.add(keys);\n  }\n  return keys;\n}\n\nconst addIfFound = (set, obj, key) => {\n  const opts = resolveObjectKey(obj, key);\n  if (opts !== undefined) {\n    set.add(opts);\n  }\n};\n\nexport default class Config {\n  constructor(config) {\n    this._config = initConfig(config);\n    this._scopeCache = new Map();\n    this._resolverCache = new Map();\n  }\n\n  get platform() {\n    return this._config.platform;\n  }\n\n  get type() {\n    return this._config.type;\n  }\n\n  set type(type) {\n    this._config.type = type;\n  }\n\n  get data() {\n    return this._config.data;\n  }\n\n  set data(data) {\n    this._config.data = initData(data);\n  }\n\n  get options() {\n    return this._config.options;\n  }\n\n  set options(options) {\n    this._config.options = options;\n  }\n\n  get plugins() {\n    return this._config.plugins;\n  }\n\n  update() {\n    const config = this._config;\n    this.clearCache();\n    initOptions(config);\n  }\n\n  clearCache() {\n    this._scopeCache.clear();\n    this._resolverCache.clear();\n  }\n\n  /**\n   * Returns the option scope keys for resolving dataset options.\n   * These keys do not include the dataset itself, because it is not under options.\n   * @param {string} datasetType\n   * @return {string[][]}\n   */\n  datasetScopeKeys(datasetType) {\n    return cachedKeys(datasetType,\n      () => [[\n        `datasets.${datasetType}`,\n        ''\n      ]]);\n  }\n\n  /**\n   * Returns the option scope keys for resolving dataset animation options.\n   * These keys do not include the dataset itself, because it is not under options.\n   * @param {string} datasetType\n   * @param {string} transition\n   * @return {string[][]}\n   */\n  datasetAnimationScopeKeys(datasetType, transition) {\n    return cachedKeys(`${datasetType}.transition.${transition}`,\n      () => [\n        [\n          `datasets.${datasetType}.transitions.${transition}`,\n          `transitions.${transition}`,\n        ],\n        // The following are used for looking up the `animations` and `animation` keys\n        [\n          `datasets.${datasetType}`,\n          ''\n        ]\n      ]);\n  }\n\n  /**\n   * Returns the options scope keys for resolving element options that belong\n   * to an dataset. These keys do not include the dataset itself, because it\n   * is not under options.\n   * @param {string} datasetType\n   * @param {string} elementType\n   * @return {string[][]}\n   */\n  datasetElementScopeKeys(datasetType, elementType) {\n    return cachedKeys(`${datasetType}-${elementType}`,\n      () => [[\n        `datasets.${datasetType}.elements.${elementType}`,\n        `datasets.${datasetType}`,\n        `elements.${elementType}`,\n        ''\n      ]]);\n  }\n\n  /**\n   * Returns the options scope keys for resolving plugin options.\n   * @param {{id: string, additionalOptionScopes?: string[]}} plugin\n   * @return {string[][]}\n   */\n  pluginScopeKeys(plugin) {\n    const id = plugin.id;\n    const type = this.type;\n    return cachedKeys(`${type}-plugin-${id}`,\n      () => [[\n        `plugins.${id}`,\n        ...plugin.additionalOptionScopes || [],\n      ]]);\n  }\n\n  /**\n   * @private\n   */\n  _cachedScopes(mainScope, resetCache) {\n    const _scopeCache = this._scopeCache;\n    let cache = _scopeCache.get(mainScope);\n    if (!cache || resetCache) {\n      cache = new Map();\n      _scopeCache.set(mainScope, cache);\n    }\n    return cache;\n  }\n\n  /**\n   * Resolves the objects from options and defaults for option value resolution.\n   * @param {object} mainScope - The main scope object for options\n   * @param {string[][]} keyLists - The arrays of keys in resolution order\n   * @param {boolean} [resetCache] - reset the cache for this mainScope\n   */\n  getOptionScopes(mainScope, keyLists, resetCache) {\n    const {options, type} = this;\n    const cache = this._cachedScopes(mainScope, resetCache);\n    const cached = cache.get(keyLists);\n    if (cached) {\n      return cached;\n    }\n\n    const scopes = new Set();\n\n    keyLists.forEach(keys => {\n      if (mainScope) {\n        scopes.add(mainScope);\n        keys.forEach(key => addIfFound(scopes, mainScope, key));\n      }\n      keys.forEach(key => addIfFound(scopes, options, key));\n      keys.forEach(key => addIfFound(scopes, overrides[type] || {}, key));\n      keys.forEach(key => addIfFound(scopes, defaults, key));\n      keys.forEach(key => addIfFound(scopes, descriptors, key));\n    });\n\n    const array = Array.from(scopes);\n    if (array.length === 0) {\n      array.push(Object.create(null));\n    }\n    if (keysCached.has(keyLists)) {\n      cache.set(keyLists, array);\n    }\n    return array;\n  }\n\n  /**\n   * Returns the option scopes for resolving chart options\n   * @return {object[]}\n   */\n  chartOptionScopes() {\n    const {options, type} = this;\n\n    return [\n      options,\n      overrides[type] || {},\n      defaults.datasets[type] || {}, // https://github.com/chartjs/Chart.js/issues/8531\n      {type},\n      defaults,\n      descriptors\n    ];\n  }\n\n  /**\n   * @param {object[]} scopes\n   * @param {string[]} names\n   * @param {function|object} context\n   * @param {string[]} [prefixes]\n   * @return {object}\n   */\n  resolveNamedOptions(scopes, names, context, prefixes = ['']) {\n    const result = {$shared: true};\n    const {resolver, subPrefixes} = getResolver(this._resolverCache, scopes, prefixes);\n    let options = resolver;\n    if (needContext(resolver, names)) {\n      result.$shared = false;\n      context = isFunction(context) ? context() : context;\n      // subResolver is passed to scriptable options. It should not resolve to hover options.\n      const subResolver = this.createResolver(scopes, context, subPrefixes);\n      options = _attachContext(resolver, context, subResolver);\n    }\n\n    for (const prop of names) {\n      result[prop] = options[prop];\n    }\n    return result;\n  }\n\n  /**\n   * @param {object[]} scopes\n   * @param {object} [context]\n   * @param {string[]} [prefixes]\n   * @param {{scriptable: boolean, indexable: boolean, allKeys?: boolean}} [descriptorDefaults]\n   */\n  createResolver(scopes, context, prefixes = [''], descriptorDefaults) {\n    const {resolver} = getResolver(this._resolverCache, scopes, prefixes);\n    return isObject(context)\n      ? _attachContext(resolver, context, undefined, descriptorDefaults)\n      : resolver;\n  }\n}\n\nfunction getResolver(resolverCache, scopes, prefixes) {\n  let cache = resolverCache.get(scopes);\n  if (!cache) {\n    cache = new Map();\n    resolverCache.set(scopes, cache);\n  }\n  const cacheKey = prefixes.join();\n  let cached = cache.get(cacheKey);\n  if (!cached) {\n    const resolver = _createResolver(scopes, prefixes);\n    cached = {\n      resolver,\n      subPrefixes: prefixes.filter(p => !p.toLowerCase().includes('hover'))\n    };\n    cache.set(cacheKey, cached);\n  }\n  return cached;\n}\n\nconst hasFunction = value => isObject(value)\n  && Object.getOwnPropertyNames(value).reduce((acc, key) => acc || isFunction(value[key]), false);\n\nfunction needContext(proxy, names) {\n  const {isScriptable, isIndexable} = _descriptors(proxy);\n\n  for (const prop of names) {\n    const scriptable = isScriptable(prop);\n    const indexable = isIndexable(prop);\n    const value = (indexable || scriptable) && proxy[prop];\n    if ((scriptable && (isFunction(value) || hasFunction(value)))\n      || (indexable && isArray(value))) {\n      return true;\n    }\n  }\n  return false;\n}\n","import animator from './core.animator';\nimport defaults, {overrides} from './core.defaults';\nimport Interaction from './core.interaction';\nimport layouts from './core.layouts';\nimport {_detectPlatform} from '../platform';\nimport PluginService from './core.plugins';\nimport registry from './core.registry';\nimport Config, {determineAxis, getIndexAxis} from './core.config';\nimport {retinaScale, _isDomSupported} from '../helpers/helpers.dom';\nimport {each, callback as callCallback, uid, valueOrDefault, _elementsEqual, isNullOrUndef, setsEqual, defined, isFunction, _isClickEvent} from '../helpers/helpers.core';\nimport {clearCanvas, clipArea, createContext, unclipArea, _isPointInArea} from '../helpers';\n// @ts-ignore\nimport {version} from '../../package.json';\nimport {debounce} from '../helpers/helpers.extras';\n\n/**\n * @typedef { import('../../types').ChartEvent } ChartEvent\n * @typedef { import(\"../../types\").Point } Point\n */\n\nconst KNOWN_POSITIONS = ['top', 'bottom', 'left', 'right', 'chartArea'];\nfunction positionIsHorizontal(position, axis) {\n  return position === 'top' || position === 'bottom' || (KNOWN_POSITIONS.indexOf(position) === -1 && axis === 'x');\n}\n\nfunction compare2Level(l1, l2) {\n  return function(a, b) {\n    return a[l1] === b[l1]\n      ? a[l2] - b[l2]\n      : a[l1] - b[l1];\n  };\n}\n\nfunction onAnimationsComplete(context) {\n  const chart = context.chart;\n  const animationOptions = chart.options.animation;\n\n  chart.notifyPlugins('afterRender');\n  callCallback(animationOptions && animationOptions.onComplete, [context], chart);\n}\n\nfunction onAnimationProgress(context) {\n  const chart = context.chart;\n  const animationOptions = chart.options.animation;\n  callCallback(animationOptions && animationOptions.onProgress, [context], chart);\n}\n\n/**\n * Chart.js can take a string id of a canvas element, a 2d context, or a canvas element itself.\n * Attempt to unwrap the item passed into the chart constructor so that it is a canvas element (if possible).\n */\nfunction getCanvas(item) {\n  if (_isDomSupported() && typeof item === 'string') {\n    item = document.getElementById(item);\n  } else if (item && item.length) {\n    // Support for array based queries (such as jQuery)\n    item = item[0];\n  }\n\n  if (item && item.canvas) {\n    // Support for any object associated to a canvas (including a context2d)\n    item = item.canvas;\n  }\n  return item;\n}\n\nconst instances = {};\nconst getChart = (key) => {\n  const canvas = getCanvas(key);\n  return Object.values(instances).filter((c) => c.canvas === canvas).pop();\n};\n\nfunction moveNumericKeys(obj, start, move) {\n  const keys = Object.keys(obj);\n  for (const key of keys) {\n    const intKey = +key;\n    if (intKey >= start) {\n      const value = obj[key];\n      delete obj[key];\n      if (move > 0 || intKey > start) {\n        obj[intKey + move] = value;\n      }\n    }\n  }\n}\n\n/**\n * @param {ChartEvent} e\n * @param {ChartEvent|null} lastEvent\n * @param {boolean} inChartArea\n * @param {boolean} isClick\n * @returns {ChartEvent|null}\n */\nfunction determineLastEvent(e, lastEvent, inChartArea, isClick) {\n  if (!inChartArea || e.type === 'mouseout') {\n    return null;\n  }\n  if (isClick) {\n    return lastEvent;\n  }\n  return e;\n}\n\nfunction getDatasetArea(meta) {\n  const {xScale, yScale} = meta;\n  if (xScale && yScale) {\n    return {\n      left: xScale.left,\n      right: xScale.right,\n      top: yScale.top,\n      bottom: yScale.bottom\n    };\n  }\n}\n\nclass Chart {\n\n  static defaults = defaults;\n  static instances = instances;\n  static overrides = overrides;\n  static registry = registry;\n  static version = version;\n  static getChart = getChart;\n\n  static register(...items) {\n    registry.add(...items);\n    invalidatePlugins();\n  }\n\n  static unregister(...items) {\n    registry.remove(...items);\n    invalidatePlugins();\n  }\n\n  // eslint-disable-next-line max-statements\n  constructor(item, userConfig) {\n    const config = this.config = new Config(userConfig);\n    const initialCanvas = getCanvas(item);\n    const existingChart = getChart(initialCanvas);\n    if (existingChart) {\n      throw new Error(\n        'Canvas is already in use. Chart with ID \\'' + existingChart.id + '\\'' +\n\t\t\t\t' must be destroyed before the canvas with ID \\'' + existingChart.canvas.id + '\\' can be reused.'\n      );\n    }\n\n    const options = config.createResolver(config.chartOptionScopes(), this.getContext());\n\n    this.platform = new (config.platform || _detectPlatform(initialCanvas))();\n    this.platform.updateConfig(config);\n\n    const context = this.platform.acquireContext(initialCanvas, options.aspectRatio);\n    const canvas = context && context.canvas;\n    const height = canvas && canvas.height;\n    const width = canvas && canvas.width;\n\n    this.id = uid();\n    this.ctx = context;\n    this.canvas = canvas;\n    this.width = width;\n    this.height = height;\n    this._options = options;\n    // Store the previously used aspect ratio to determine if a resize\n    // is needed during updates. Do this after _options is set since\n    // aspectRatio uses a getter\n    this._aspectRatio = this.aspectRatio;\n    this._layers = [];\n    this._metasets = [];\n    this._stacks = undefined;\n    this.boxes = [];\n    this.currentDevicePixelRatio = undefined;\n    this.chartArea = undefined;\n    this._active = [];\n    this._lastEvent = undefined;\n    this._listeners = {};\n    /** @type {?{attach?: function, detach?: function, resize?: function}} */\n    this._responsiveListeners = undefined;\n    this._sortedMetasets = [];\n    this.scales = {};\n    this._plugins = new PluginService();\n    this.$proxies = {};\n    this._hiddenIndices = {};\n    this.attached = false;\n    this._animationsDisabled = undefined;\n    this.$context = undefined;\n    this._doResize = debounce(mode => this.update(mode), options.resizeDelay || 0);\n    this._dataChanges = [];\n\n    // Add the chart instance to the global namespace\n    instances[this.id] = this;\n\n    if (!context || !canvas) {\n      // The given item is not a compatible context2d element, let's return before finalizing\n      // the chart initialization but after setting basic chart / controller properties that\n      // can help to figure out that the chart is not valid (e.g chart.canvas !== null);\n      // https://github.com/chartjs/Chart.js/issues/2807\n      console.error(\"Failed to create chart: can't acquire context from the given item\");\n      return;\n    }\n\n    animator.listen(this, 'complete', onAnimationsComplete);\n    animator.listen(this, 'progress', onAnimationProgress);\n\n    this._initialize();\n    if (this.attached) {\n      this.update();\n    }\n  }\n\n  get aspectRatio() {\n    const {options: {aspectRatio, maintainAspectRatio}, width, height, _aspectRatio} = this;\n    if (!isNullOrUndef(aspectRatio)) {\n      // If aspectRatio is defined in options, use that.\n      return aspectRatio;\n    }\n\n    if (maintainAspectRatio && _aspectRatio) {\n      // If maintainAspectRatio is truthly and we had previously determined _aspectRatio, use that\n      return _aspectRatio;\n    }\n\n    // Calculate\n    return height ? width / height : null;\n  }\n\n  get data() {\n    return this.config.data;\n  }\n\n  set data(data) {\n    this.config.data = data;\n  }\n\n  get options() {\n    return this._options;\n  }\n\n  set options(options) {\n    this.config.options = options;\n  }\n\n  get registry() {\n    return registry;\n  }\n\n  /**\n\t * @private\n\t */\n  _initialize() {\n    // Before init plugin notification\n    this.notifyPlugins('beforeInit');\n\n    if (this.options.responsive) {\n      this.resize();\n    } else {\n      retinaScale(this, this.options.devicePixelRatio);\n    }\n\n    this.bindEvents();\n\n    // After init plugin notification\n    this.notifyPlugins('afterInit');\n\n    return this;\n  }\n\n  clear() {\n    clearCanvas(this.canvas, this.ctx);\n    return this;\n  }\n\n  stop() {\n    animator.stop(this);\n    return this;\n  }\n\n  /**\n\t * Resize the chart to its container or to explicit dimensions.\n\t * @param {number} [width]\n\t * @param {number} [height]\n\t */\n  resize(width, height) {\n    if (!animator.running(this)) {\n      this._resize(width, height);\n    } else {\n      this._resizeBeforeDraw = {width, height};\n    }\n  }\n\n  _resize(width, height) {\n    const options = this.options;\n    const canvas = this.canvas;\n    const aspectRatio = options.maintainAspectRatio && this.aspectRatio;\n    const newSize = this.platform.getMaximumSize(canvas, width, height, aspectRatio);\n    const newRatio = options.devicePixelRatio || this.platform.getDevicePixelRatio();\n    const mode = this.width ? 'resize' : 'attach';\n\n    this.width = newSize.width;\n    this.height = newSize.height;\n    this._aspectRatio = this.aspectRatio;\n    if (!retinaScale(this, newRatio, true)) {\n      return;\n    }\n\n    this.notifyPlugins('resize', {size: newSize});\n\n    callCallback(options.onResize, [this, newSize], this);\n\n    if (this.attached) {\n      if (this._doResize(mode)) {\n        // The resize update is delayed, only draw without updating.\n        this.render();\n      }\n    }\n  }\n\n  ensureScalesHaveIDs() {\n    const options = this.options;\n    const scalesOptions = options.scales || {};\n\n    each(scalesOptions, (axisOptions, axisID) => {\n      axisOptions.id = axisID;\n    });\n  }\n\n  /**\n\t * Builds a map of scale ID to scale object for future lookup.\n\t */\n  buildOrUpdateScales() {\n    const options = this.options;\n    const scaleOpts = options.scales;\n    const scales = this.scales;\n    const updated = Object.keys(scales).reduce((obj, id) => {\n      obj[id] = false;\n      return obj;\n    }, {});\n    let items = [];\n\n    if (scaleOpts) {\n      items = items.concat(\n        Object.keys(scaleOpts).map((id) => {\n          const scaleOptions = scaleOpts[id];\n          const axis = determineAxis(id, scaleOptions);\n          const isRadial = axis === 'r';\n          const isHorizontal = axis === 'x';\n          return {\n            options: scaleOptions,\n            dposition: isRadial ? 'chartArea' : isHorizontal ? 'bottom' : 'left',\n            dtype: isRadial ? 'radialLinear' : isHorizontal ? 'category' : 'linear'\n          };\n        })\n      );\n    }\n\n    each(items, (item) => {\n      const scaleOptions = item.options;\n      const id = scaleOptions.id;\n      const axis = determineAxis(id, scaleOptions);\n      const scaleType = valueOrDefault(scaleOptions.type, item.dtype);\n\n      if (scaleOptions.position === undefined || positionIsHorizontal(scaleOptions.position, axis) !== positionIsHorizontal(item.dposition)) {\n        scaleOptions.position = item.dposition;\n      }\n\n      updated[id] = true;\n      let scale = null;\n      if (id in scales && scales[id].type === scaleType) {\n        scale = scales[id];\n      } else {\n        const scaleClass = registry.getScale(scaleType);\n        scale = new scaleClass({\n          id,\n          type: scaleType,\n          ctx: this.ctx,\n          chart: this\n        });\n        scales[scale.id] = scale;\n      }\n\n      scale.init(scaleOptions, options);\n    });\n    // clear up discarded scales\n    each(updated, (hasUpdated, id) => {\n      if (!hasUpdated) {\n        delete scales[id];\n      }\n    });\n\n    each(scales, (scale) => {\n      layouts.configure(this, scale, scale.options);\n      layouts.addBox(this, scale);\n    });\n  }\n\n  /**\n\t * @private\n\t */\n  _updateMetasets() {\n    const metasets = this._metasets;\n    const numData = this.data.datasets.length;\n    const numMeta = metasets.length;\n\n    metasets.sort((a, b) => a.index - b.index);\n    if (numMeta > numData) {\n      for (let i = numData; i < numMeta; ++i) {\n        this._destroyDatasetMeta(i);\n      }\n      metasets.splice(numData, numMeta - numData);\n    }\n    this._sortedMetasets = metasets.slice(0).sort(compare2Level('order', 'index'));\n  }\n\n  /**\n\t * @private\n\t */\n  _removeUnreferencedMetasets() {\n    const {_metasets: metasets, data: {datasets}} = this;\n    if (metasets.length > datasets.length) {\n      delete this._stacks;\n    }\n    metasets.forEach((meta, index) => {\n      if (datasets.filter(x => x === meta._dataset).length === 0) {\n        this._destroyDatasetMeta(index);\n      }\n    });\n  }\n\n  buildOrUpdateControllers() {\n    const newControllers = [];\n    const datasets = this.data.datasets;\n    let i, ilen;\n\n    this._removeUnreferencedMetasets();\n\n    for (i = 0, ilen = datasets.length; i < ilen; i++) {\n      const dataset = datasets[i];\n      let meta = this.getDatasetMeta(i);\n      const type = dataset.type || this.config.type;\n\n      if (meta.type && meta.type !== type) {\n        this._destroyDatasetMeta(i);\n        meta = this.getDatasetMeta(i);\n      }\n      meta.type = type;\n      meta.indexAxis = dataset.indexAxis || getIndexAxis(type, this.options);\n      meta.order = dataset.order || 0;\n      meta.index = i;\n      meta.label = '' + dataset.label;\n      meta.visible = this.isDatasetVisible(i);\n\n      if (meta.controller) {\n        meta.controller.updateIndex(i);\n        meta.controller.linkScales();\n      } else {\n        const ControllerClass = registry.getController(type);\n        const {datasetElementType, dataElementType} = defaults.datasets[type];\n        Object.assign(ControllerClass, {\n          dataElementType: registry.getElement(dataElementType),\n          datasetElementType: datasetElementType && registry.getElement(datasetElementType)\n        });\n        meta.controller = new ControllerClass(this, i);\n        newControllers.push(meta.controller);\n      }\n    }\n\n    this._updateMetasets();\n    return newControllers;\n  }\n\n  /**\n\t * Reset the elements of all datasets\n\t * @private\n\t */\n  _resetElements() {\n    each(this.data.datasets, (dataset, datasetIndex) => {\n      this.getDatasetMeta(datasetIndex).controller.reset();\n    }, this);\n  }\n\n  /**\n\t* Resets the chart back to its state before the initial animation\n\t*/\n  reset() {\n    this._resetElements();\n    this.notifyPlugins('reset');\n  }\n\n  update(mode) {\n    const config = this.config;\n\n    config.update();\n    const options = this._options = config.createResolver(config.chartOptionScopes(), this.getContext());\n    const animsDisabled = this._animationsDisabled = !options.animation;\n\n    this._updateScales();\n    this._checkEventBindings();\n    this._updateHiddenIndices();\n\n    // plugins options references might have change, let's invalidate the cache\n    // https://github.com/chartjs/Chart.js/issues/5111#issuecomment-355934167\n    this._plugins.invalidate();\n\n    if (this.notifyPlugins('beforeUpdate', {mode, cancelable: true}) === false) {\n      return;\n    }\n\n    // Make sure dataset controllers are updated and new controllers are reset\n    const newControllers = this.buildOrUpdateControllers();\n\n    this.notifyPlugins('beforeElementsUpdate');\n\n    // Make sure all dataset controllers have correct meta data counts\n    let minPadding = 0;\n    for (let i = 0, ilen = this.data.datasets.length; i < ilen; i++) {\n      const {controller} = this.getDatasetMeta(i);\n      const reset = !animsDisabled && newControllers.indexOf(controller) === -1;\n      // New controllers will be reset after the layout pass, so we only want to modify\n      // elements added to new datasets\n      controller.buildOrUpdateElements(reset);\n      minPadding = Math.max(+controller.getMaxOverflow(), minPadding);\n    }\n    minPadding = this._minPadding = options.layout.autoPadding ? minPadding : 0;\n    this._updateLayout(minPadding);\n\n    // Only reset the controllers if we have animations\n    if (!animsDisabled) {\n      // Can only reset the new controllers after the scales have been updated\n      // Reset is done to get the starting point for the initial animation\n      each(newControllers, (controller) => {\n        controller.reset();\n      });\n    }\n\n    this._updateDatasets(mode);\n\n    // Do this before render so that any plugins that need final scale updates can use it\n    this.notifyPlugins('afterUpdate', {mode});\n\n    this._layers.sort(compare2Level('z', '_idx'));\n\n    // Replay last event from before update, or set hover styles on active elements\n    const {_active, _lastEvent} = this;\n    if (_lastEvent) {\n      this._eventHandler(_lastEvent, true);\n    } else if (_active.length) {\n      this._updateHoverStyles(_active, _active, true);\n    }\n\n    this.render();\n  }\n\n  /**\n   * @private\n   */\n  _updateScales() {\n    each(this.scales, (scale) => {\n      layouts.removeBox(this, scale);\n    });\n\n    this.ensureScalesHaveIDs();\n    this.buildOrUpdateScales();\n  }\n\n  /**\n   * @private\n   */\n  _checkEventBindings() {\n    const options = this.options;\n    const existingEvents = new Set(Object.keys(this._listeners));\n    const newEvents = new Set(options.events);\n\n    if (!setsEqual(existingEvents, newEvents) || !!this._responsiveListeners !== options.responsive) {\n      // The configured events have changed. Rebind.\n      this.unbindEvents();\n      this.bindEvents();\n    }\n  }\n\n  /**\n   * @private\n   */\n  _updateHiddenIndices() {\n    const {_hiddenIndices} = this;\n    const changes = this._getUniformDataChanges() || [];\n    for (const {method, start, count} of changes) {\n      const move = method === '_removeElements' ? -count : count;\n      moveNumericKeys(_hiddenIndices, start, move);\n    }\n  }\n\n  /**\n   * @private\n   */\n  _getUniformDataChanges() {\n    const _dataChanges = this._dataChanges;\n    if (!_dataChanges || !_dataChanges.length) {\n      return;\n    }\n\n    this._dataChanges = [];\n    const datasetCount = this.data.datasets.length;\n    const makeSet = (idx) => new Set(\n      _dataChanges\n        .filter(c => c[0] === idx)\n        .map((c, i) => i + ',' + c.splice(1).join(','))\n    );\n\n    const changeSet = makeSet(0);\n    for (let i = 1; i < datasetCount; i++) {\n      if (!setsEqual(changeSet, makeSet(i))) {\n        return;\n      }\n    }\n    return Array.from(changeSet)\n      .map(c => c.split(','))\n      .map(a => ({method: a[1], start: +a[2], count: +a[3]}));\n  }\n\n  /**\n\t * Updates the chart layout unless a plugin returns `false` to the `beforeLayout`\n\t * hook, in which case, plugins will not be called on `afterLayout`.\n\t * @private\n\t */\n  _updateLayout(minPadding) {\n    if (this.notifyPlugins('beforeLayout', {cancelable: true}) === false) {\n      return;\n    }\n\n    layouts.update(this, this.width, this.height, minPadding);\n\n    const area = this.chartArea;\n    const noArea = area.width <= 0 || area.height <= 0;\n\n    this._layers = [];\n    each(this.boxes, (box) => {\n      if (noArea && box.position === 'chartArea') {\n        // Skip drawing and configuring chartArea boxes when chartArea is zero or negative\n        return;\n      }\n\n      // configure is called twice, once in core.scale.update and once here.\n      // Here the boxes are fully updated and at their final positions.\n      if (box.configure) {\n        box.configure();\n      }\n      this._layers.push(...box._layers());\n    }, this);\n\n    this._layers.forEach((item, index) => {\n      item._idx = index;\n    });\n\n    this.notifyPlugins('afterLayout');\n  }\n\n  /**\n\t * Updates all datasets unless a plugin returns `false` to the `beforeDatasetsUpdate`\n\t * hook, in which case, plugins will not be called on `afterDatasetsUpdate`.\n\t * @private\n\t */\n  _updateDatasets(mode) {\n    if (this.notifyPlugins('beforeDatasetsUpdate', {mode, cancelable: true}) === false) {\n      return;\n    }\n\n    for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {\n      this.getDatasetMeta(i).controller.configure();\n    }\n\n    for (let i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {\n      this._updateDataset(i, isFunction(mode) ? mode({datasetIndex: i}) : mode);\n    }\n\n    this.notifyPlugins('afterDatasetsUpdate', {mode});\n  }\n\n  /**\n\t * Updates dataset at index unless a plugin returns `false` to the `beforeDatasetUpdate`\n\t * hook, in which case, plugins will not be called on `afterDatasetUpdate`.\n\t * @private\n\t */\n  _updateDataset(index, mode) {\n    const meta = this.getDatasetMeta(index);\n    const args = {meta, index, mode, cancelable: true};\n\n    if (this.notifyPlugins('beforeDatasetUpdate', args) === false) {\n      return;\n    }\n\n    meta.controller._update(mode);\n\n    args.cancelable = false;\n    this.notifyPlugins('afterDatasetUpdate', args);\n  }\n\n  render() {\n    if (this.notifyPlugins('beforeRender', {cancelable: true}) === false) {\n      return;\n    }\n\n    if (animator.has(this)) {\n      if (this.attached && !animator.running(this)) {\n        animator.start(this);\n      }\n    } else {\n      this.draw();\n      onAnimationsComplete({chart: this});\n    }\n  }\n\n  draw() {\n    let i;\n    if (this._resizeBeforeDraw) {\n      const {width, height} = this._resizeBeforeDraw;\n      this._resize(width, height);\n      this._resizeBeforeDraw = null;\n    }\n    this.clear();\n\n    if (this.width <= 0 || this.height <= 0) {\n      return;\n    }\n\n    if (this.notifyPlugins('beforeDraw', {cancelable: true}) === false) {\n      return;\n    }\n\n    // Because of plugin hooks (before/afterDatasetsDraw), datasets can't\n    // currently be part of layers. Instead, we draw\n    // layers <= 0 before(default, backward compat), and the rest after\n    const layers = this._layers;\n    for (i = 0; i < layers.length && layers[i].z <= 0; ++i) {\n      layers[i].draw(this.chartArea);\n    }\n\n    this._drawDatasets();\n\n    // Rest of layers\n    for (; i < layers.length; ++i) {\n      layers[i].draw(this.chartArea);\n    }\n\n    this.notifyPlugins('afterDraw');\n  }\n\n  /**\n\t * @private\n\t */\n  _getSortedDatasetMetas(filterVisible) {\n    const metasets = this._sortedMetasets;\n    const result = [];\n    let i, ilen;\n\n    for (i = 0, ilen = metasets.length; i < ilen; ++i) {\n      const meta = metasets[i];\n      if (!filterVisible || meta.visible) {\n        result.push(meta);\n      }\n    }\n\n    return result;\n  }\n\n  /**\n\t * Gets the visible dataset metas in drawing order\n\t * @return {object[]}\n\t */\n  getSortedVisibleDatasetMetas() {\n    return this._getSortedDatasetMetas(true);\n  }\n\n  /**\n\t * Draws all datasets unless a plugin returns `false` to the `beforeDatasetsDraw`\n\t * hook, in which case, plugins will not be called on `afterDatasetsDraw`.\n\t * @private\n\t */\n  _drawDatasets() {\n    if (this.notifyPlugins('beforeDatasetsDraw', {cancelable: true}) === false) {\n      return;\n    }\n\n    const metasets = this.getSortedVisibleDatasetMetas();\n    for (let i = metasets.length - 1; i >= 0; --i) {\n      this._drawDataset(metasets[i]);\n    }\n\n    this.notifyPlugins('afterDatasetsDraw');\n  }\n\n  /**\n\t * Draws dataset at index unless a plugin returns `false` to the `beforeDatasetDraw`\n\t * hook, in which case, plugins will not be called on `afterDatasetDraw`.\n\t * @private\n\t */\n  _drawDataset(meta) {\n    const ctx = this.ctx;\n    const clip = meta._clip;\n    const useClip = !clip.disabled;\n    const area = getDatasetArea(meta) || this.chartArea;\n    const args = {\n      meta,\n      index: meta.index,\n      cancelable: true\n    };\n\n    if (this.notifyPlugins('beforeDatasetDraw', args) === false) {\n      return;\n    }\n\n    if (useClip) {\n      clipArea(ctx, {\n        left: clip.left === false ? 0 : area.left - clip.left,\n        right: clip.right === false ? this.width : area.right + clip.right,\n        top: clip.top === false ? 0 : area.top - clip.top,\n        bottom: clip.bottom === false ? this.height : area.bottom + clip.bottom\n      });\n    }\n\n    meta.controller.draw();\n\n    if (useClip) {\n      unclipArea(ctx);\n    }\n\n    args.cancelable = false;\n    this.notifyPlugins('afterDatasetDraw', args);\n  }\n\n  /**\n   * Checks whether the given point is in the chart area.\n   * @param {Point} point - in relative coordinates (see, e.g., getRelativePosition)\n   * @returns {boolean}\n   */\n  isPointInArea(point) {\n    return _isPointInArea(point, this.chartArea, this._minPadding);\n  }\n\n  getElementsAtEventForMode(e, mode, options, useFinalPosition) {\n    const method = Interaction.modes[mode];\n    if (typeof method === 'function') {\n      return method(this, e, options, useFinalPosition);\n    }\n\n    return [];\n  }\n\n  getDatasetMeta(datasetIndex) {\n    const dataset = this.data.datasets[datasetIndex];\n    const metasets = this._metasets;\n    let meta = metasets.filter(x => x && x._dataset === dataset).pop();\n\n    if (!meta) {\n      meta = {\n        type: null,\n        data: [],\n        dataset: null,\n        controller: null,\n        hidden: null,\t\t\t// See isDatasetVisible() comment\n        xAxisID: null,\n        yAxisID: null,\n        order: dataset && dataset.order || 0,\n        index: datasetIndex,\n        _dataset: dataset,\n        _parsed: [],\n        _sorted: false\n      };\n      metasets.push(meta);\n    }\n\n    return meta;\n  }\n\n  getContext() {\n    return this.$context || (this.$context = createContext(null, {chart: this, type: 'chart'}));\n  }\n\n  getVisibleDatasetCount() {\n    return this.getSortedVisibleDatasetMetas().length;\n  }\n\n  isDatasetVisible(datasetIndex) {\n    const dataset = this.data.datasets[datasetIndex];\n    if (!dataset) {\n      return false;\n    }\n\n    const meta = this.getDatasetMeta(datasetIndex);\n\n    // meta.hidden is a per chart dataset hidden flag override with 3 states: if true or false,\n    // the dataset.hidden value is ignored, else if null, the dataset hidden state is returned.\n    return typeof meta.hidden === 'boolean' ? !meta.hidden : !dataset.hidden;\n  }\n\n  setDatasetVisibility(datasetIndex, visible) {\n    const meta = this.getDatasetMeta(datasetIndex);\n    meta.hidden = !visible;\n  }\n\n  toggleDataVisibility(index) {\n    this._hiddenIndices[index] = !this._hiddenIndices[index];\n  }\n\n  getDataVisibility(index) {\n    return !this._hiddenIndices[index];\n  }\n\n  /**\n\t * @private\n\t */\n  _updateVisibility(datasetIndex, dataIndex, visible) {\n    const mode = visible ? 'show' : 'hide';\n    const meta = this.getDatasetMeta(datasetIndex);\n    const anims = meta.controller._resolveAnimations(undefined, mode);\n\n    if (defined(dataIndex)) {\n      meta.data[dataIndex].hidden = !visible;\n      this.update();\n    } else {\n      this.setDatasetVisibility(datasetIndex, visible);\n      // Animate visible state, so hide animation can be seen. This could be handled better if update / updateDataset returned a Promise.\n      anims.update(meta, {visible});\n      this.update((ctx) => ctx.datasetIndex === datasetIndex ? mode : undefined);\n    }\n  }\n\n  hide(datasetIndex, dataIndex) {\n    this._updateVisibility(datasetIndex, dataIndex, false);\n  }\n\n  show(datasetIndex, dataIndex) {\n    this._updateVisibility(datasetIndex, dataIndex, true);\n  }\n\n  /**\n\t * @private\n\t */\n  _destroyDatasetMeta(datasetIndex) {\n    const meta = this._metasets[datasetIndex];\n    if (meta && meta.controller) {\n      meta.controller._destroy();\n    }\n    delete this._metasets[datasetIndex];\n  }\n\n  _stop() {\n    let i, ilen;\n    this.stop();\n    animator.remove(this);\n\n    for (i = 0, ilen = this.data.datasets.length; i < ilen; ++i) {\n      this._destroyDatasetMeta(i);\n    }\n  }\n\n  destroy() {\n    this.notifyPlugins('beforeDestroy');\n    const {canvas, ctx} = this;\n\n    this._stop();\n    this.config.clearCache();\n\n    if (canvas) {\n      this.unbindEvents();\n      clearCanvas(canvas, ctx);\n      this.platform.releaseContext(ctx);\n      this.canvas = null;\n      this.ctx = null;\n    }\n\n    delete instances[this.id];\n\n    this.notifyPlugins('afterDestroy');\n  }\n\n  toBase64Image(...args) {\n    return this.canvas.toDataURL(...args);\n  }\n\n  /**\n\t * @private\n\t */\n  bindEvents() {\n    this.bindUserEvents();\n    if (this.options.responsive) {\n      this.bindResponsiveEvents();\n    } else {\n      this.attached = true;\n    }\n  }\n\n  /**\n   * @private\n   */\n  bindUserEvents() {\n    const listeners = this._listeners;\n    const platform = this.platform;\n\n    const _add = (type, listener) => {\n      platform.addEventListener(this, type, listener);\n      listeners[type] = listener;\n    };\n\n    const listener = (e, x, y) => {\n      e.offsetX = x;\n      e.offsetY = y;\n      this._eventHandler(e);\n    };\n\n    each(this.options.events, (type) => _add(type, listener));\n  }\n\n  /**\n   * @private\n   */\n  bindResponsiveEvents() {\n    if (!this._responsiveListeners) {\n      this._responsiveListeners = {};\n    }\n    const listeners = this._responsiveListeners;\n    const platform = this.platform;\n\n    const _add = (type, listener) => {\n      platform.addEventListener(this, type, listener);\n      listeners[type] = listener;\n    };\n    const _remove = (type, listener) => {\n      if (listeners[type]) {\n        platform.removeEventListener(this, type, listener);\n        delete listeners[type];\n      }\n    };\n\n    const listener = (width, height) => {\n      if (this.canvas) {\n        this.resize(width, height);\n      }\n    };\n\n    let detached; // eslint-disable-line prefer-const\n    const attached = () => {\n      _remove('attach', attached);\n\n      this.attached = true;\n      this.resize();\n\n      _add('resize', listener);\n      _add('detach', detached);\n    };\n\n    detached = () => {\n      this.attached = false;\n\n      _remove('resize', listener);\n\n      // Stop animating and remove metasets, so when re-attached, the animations start from beginning.\n      this._stop();\n      this._resize(0, 0);\n\n      _add('attach', attached);\n    };\n\n    if (platform.isAttached(this.canvas)) {\n      attached();\n    } else {\n      detached();\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  unbindEvents() {\n    each(this._listeners, (listener, type) => {\n      this.platform.removeEventListener(this, type, listener);\n    });\n    this._listeners = {};\n\n    each(this._responsiveListeners, (listener, type) => {\n      this.platform.removeEventListener(this, type, listener);\n    });\n    this._responsiveListeners = undefined;\n  }\n\n  updateHoverStyle(items, mode, enabled) {\n    const prefix = enabled ? 'set' : 'remove';\n    let meta, item, i, ilen;\n\n    if (mode === 'dataset') {\n      meta = this.getDatasetMeta(items[0].datasetIndex);\n      meta.controller['_' + prefix + 'DatasetHoverStyle']();\n    }\n\n    for (i = 0, ilen = items.length; i < ilen; ++i) {\n      item = items[i];\n      const controller = item && this.getDatasetMeta(item.datasetIndex).controller;\n      if (controller) {\n        controller[prefix + 'HoverStyle'](item.element, item.datasetIndex, item.index);\n      }\n    }\n  }\n\n  /**\n\t * Get active (hovered) elements\n\t * @returns array\n\t */\n  getActiveElements() {\n    return this._active || [];\n  }\n\n  /**\n\t * Set active (hovered) elements\n\t * @param {array} activeElements New active data points\n\t */\n  setActiveElements(activeElements) {\n    const lastActive = this._active || [];\n    const active = activeElements.map(({datasetIndex, index}) => {\n      const meta = this.getDatasetMeta(datasetIndex);\n      if (!meta) {\n        throw new Error('No dataset found at index ' + datasetIndex);\n      }\n\n      return {\n        datasetIndex,\n        element: meta.data[index],\n        index,\n      };\n    });\n    const changed = !_elementsEqual(active, lastActive);\n\n    if (changed) {\n      this._active = active;\n      // Make sure we don't use the previous mouse event to override the active elements in update.\n      this._lastEvent = null;\n      this._updateHoverStyles(active, lastActive);\n    }\n  }\n\n  /**\n\t * Calls enabled plugins on the specified hook and with the given args.\n\t * This method immediately returns as soon as a plugin explicitly returns false. The\n\t * returned value can be used, for instance, to interrupt the current action.\n\t * @param {string} hook - The name of the plugin method to call (e.g. 'beforeUpdate').\n\t * @param {Object} [args] - Extra arguments to apply to the hook call.\n   * @param {import('./core.plugins').filterCallback} [filter] - Filtering function for limiting which plugins are notified\n\t * @returns {boolean} false if any of the plugins return false, else returns true.\n\t */\n  notifyPlugins(hook, args, filter) {\n    return this._plugins.notify(this, hook, args, filter);\n  }\n\n  /**\n   * Check if a plugin with the specific ID is registered and enabled\n   * @param {string} pluginId - The ID of the plugin of which to check if it is enabled\n   * @returns {boolean}\n   */\n  isPluginEnabled(pluginId) {\n    return this._plugins._cache.filter(p => p.plugin.id === pluginId).length === 1;\n  }\n\n  /**\n\t * @private\n\t */\n  _updateHoverStyles(active, lastActive, replay) {\n    const hoverOptions = this.options.hover;\n    const diff = (a, b) => a.filter(x => !b.some(y => x.datasetIndex === y.datasetIndex && x.index === y.index));\n    const deactivated = diff(lastActive, active);\n    const activated = replay ? active : diff(active, lastActive);\n\n    if (deactivated.length) {\n      this.updateHoverStyle(deactivated, hoverOptions.mode, false);\n    }\n\n    if (activated.length && hoverOptions.mode) {\n      this.updateHoverStyle(activated, hoverOptions.mode, true);\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _eventHandler(e, replay) {\n    const args = {\n      event: e,\n      replay,\n      cancelable: true,\n      inChartArea: this.isPointInArea(e)\n    };\n    const eventFilter = (plugin) => (plugin.options.events || this.options.events).includes(e.native.type);\n\n    if (this.notifyPlugins('beforeEvent', args, eventFilter) === false) {\n      return;\n    }\n\n    const changed = this._handleEvent(e, replay, args.inChartArea);\n\n    args.cancelable = false;\n    this.notifyPlugins('afterEvent', args, eventFilter);\n\n    if (changed || args.changed) {\n      this.render();\n    }\n\n    return this;\n  }\n\n  /**\n\t * Handle an event\n\t * @param {ChartEvent} e the event to handle\n\t * @param {boolean} [replay] - true if the event was replayed by `update`\n   * @param {boolean} [inChartArea] - true if the event is inside chartArea\n\t * @return {boolean} true if the chart needs to re-render\n\t * @private\n\t */\n  _handleEvent(e, replay, inChartArea) {\n    const {_active: lastActive = [], options} = this;\n\n    // If the event is replayed from `update`, we should evaluate with the final positions.\n    //\n    // The `replay`:\n    // It's the last event (excluding click) that has occurred before `update`.\n    // So mouse has not moved. It's also over the chart, because there is a `replay`.\n    //\n    // The why:\n    // If animations are active, the elements haven't moved yet compared to state before update.\n    // But if they will, we are activating the elements that would be active, if this check\n    // was done after the animations have completed. => \"final positions\".\n    // If there is no animations, the \"final\" and \"current\" positions are equal.\n    // This is done so we do not have to evaluate the active elements each animation frame\n    // - it would be expensive.\n    const useFinalPosition = replay;\n    const active = this._getActiveElements(e, lastActive, inChartArea, useFinalPosition);\n    const isClick = _isClickEvent(e);\n    const lastEvent = determineLastEvent(e, this._lastEvent, inChartArea, isClick);\n\n    if (inChartArea) {\n      // Set _lastEvent to null while we are processing the event handlers.\n      // This prevents recursion if the handler calls chart.update()\n      this._lastEvent = null;\n\n      // Invoke onHover hook\n      callCallback(options.onHover, [e, active, this], this);\n\n      if (isClick) {\n        callCallback(options.onClick, [e, active, this], this);\n      }\n    }\n\n    const changed = !_elementsEqual(active, lastActive);\n    if (changed || replay) {\n      this._active = active;\n      this._updateHoverStyles(active, lastActive, replay);\n    }\n\n    this._lastEvent = lastEvent;\n\n    return changed;\n  }\n\n  /**\n   * @param {ChartEvent} e - The event\n   * @param {import('../../types').ActiveElement[]} lastActive - Previously active elements\n   * @param {boolean} inChartArea - Is the envent inside chartArea\n   * @param {boolean} useFinalPosition - Should the evaluation be done with current or final (after animation) element positions\n   * @returns {import('../../types').ActiveElement[]} - The active elements\n   * @pravate\n   */\n  _getActiveElements(e, lastActive, inChartArea, useFinalPosition) {\n    if (e.type === 'mouseout') {\n      return [];\n    }\n\n    if (!inChartArea) {\n      // Let user control the active elements outside chartArea. Eg. using Legend.\n      return lastActive;\n    }\n\n    const hoverOptions = this.options.hover;\n    return this.getElementsAtEventForMode(e, hoverOptions.mode, hoverOptions, useFinalPosition);\n  }\n}\n\n// @ts-ignore\nfunction invalidatePlugins() {\n  return each(Chart.instances, (chart) => chart._plugins.invalidate());\n}\n\nexport default Chart;\n","/**\n * @namespace Chart._adapters\n * @since 2.8.0\n * @private\n */\n\nimport type {AnyObject} from '../../types/basic';\nimport type {ChartOptions} from '../../types';\n\nexport type TimeUnit = 'millisecond' | 'second' | 'minute' | 'hour' | 'day' | 'week' | 'month' | 'quarter' | 'year';\n\nexport interface DateAdapter<T extends AnyObject = AnyObject> {\n  readonly options: T;\n  /**\n   * Will called with chart options after adapter creation.\n   */\n  init(this: DateAdapter<T>, chartOptions: ChartOptions): void;\n  /**\n   * Returns a map of time formats for the supported formatting units defined\n   * in Unit as well as 'datetime' representing a detailed date/time string.\n   */\n  formats(this: DateAdapter<T>): Record<string, string>;\n  /**\n   * Parses the given `value` and return the associated timestamp.\n   * @param value - the value to parse (usually comes from the data)\n   * @param [format] - the expected data format\n   */\n  parse(this: DateAdapter<T>, value: unknown, format?: TimeUnit): number | null;\n  /**\n   * Returns the formatted date in the specified `format` for a given `timestamp`.\n   * @param timestamp - the timestamp to format\n   * @param format - the date/time token\n   */\n  format(this: DateAdapter<T>, timestamp: number, format: TimeUnit): string;\n  /**\n   * Adds the specified `amount` of `unit` to the given `timestamp`.\n   * @param timestamp - the input timestamp\n   * @param amount - the amount to add\n   * @param unit - the unit as string\n   */\n  add(this: DateAdapter<T>, timestamp: number, amount: number, unit: TimeUnit): number;\n  /**\n   * Returns the number of `unit` between the given timestamps.\n   * @param a - the input timestamp (reference)\n   * @param b - the timestamp to subtract\n   * @param unit - the unit as string\n   */\n  diff(this: DateAdapter<T>, a: number, b: number, unit: TimeUnit): number;\n  /**\n   * Returns start of `unit` for the given `timestamp`.\n   * @param timestamp - the input timestamp\n   * @param unit - the unit as string\n   * @param [weekday] - the ISO day of the week with 1 being Monday\n   * and 7 being Sunday (only needed if param *unit* is `isoWeek`).\n   */\n  startOf(this: DateAdapter<T>, timestamp: number, unit: TimeUnit | 'isoWeek', weekday?: number): number;\n  /**\n   * Returns end of `unit` for the given `timestamp`.\n   * @param timestamp - the input timestamp\n   * @param unit - the unit as string\n   */\n  endOf(this: DateAdapter<T>, timestamp: number, unit: TimeUnit | 'isoWeek'): number;\n}\n\nfunction abstract<T = void>(): T {\n  throw new Error('This method is not implemented: Check that a complete date adapter is provided.');\n}\n\n/**\n * Date adapter (current used by the time scale)\n * @namespace Chart._adapters._date\n * @memberof Chart._adapters\n * @private\n */\nclass DateAdapterBase implements DateAdapter {\n\n  /**\n   * Override default date adapter methods.\n   * Accepts type parameter to define options type.\n   * @example\n   * Chart._adapters._date.override<{myAdapterOption: string}>({\n   *   init() {\n   *     console.log(this.options.myAdapterOption);\n   *   }\n   * })\n   */\n  static override<T extends AnyObject = AnyObject>(\n    members: Partial<Omit<DateAdapter<T>, 'options'>>\n  ) {\n    Object.assign(DateAdapterBase.prototype, members);\n  }\n\n  readonly options: AnyObject;\n\n  constructor(options: AnyObject) {\n    this.options = options || {};\n  }\n\n  // eslint-disable-next-line @typescript-eslint/no-empty-function\n  init() {}\n\n  formats(): Record<string, string> {\n    return abstract();\n  }\n\n  parse(): number | null {\n    return abstract();\n  }\n\n  format(): string {\n    return abstract();\n  }\n\n  add(): number {\n    return abstract();\n  }\n\n  diff(): number {\n    return abstract();\n  }\n\n  startOf(): number {\n    return abstract();\n  }\n\n  endOf(): number {\n    return abstract();\n  }\n}\n\nexport default {\n  _date: DateAdapterBase\n};\n","import DatasetController from '../core/core.datasetController';\nimport {\n  _arrayUnique, isArray, isNullOrUndef,\n  valueOrDefault, resolveObjectKey, sign, defined\n} from '../helpers';\n\nfunction getAllScaleValues(scale, type) {\n  if (!scale._cache.$bar) {\n    const visibleMetas = scale.getMatchingVisibleMetas(type);\n    let values = [];\n\n    for (let i = 0, ilen = visibleMetas.length; i < ilen; i++) {\n      values = values.concat(visibleMetas[i].controller.getAllParsedValues(scale));\n    }\n    scale._cache.$bar = _arrayUnique(values.sort((a, b) => a - b));\n  }\n  return scale._cache.$bar;\n}\n\n/**\n * Computes the \"optimal\" sample size to maintain bars equally sized while preventing overlap.\n * @private\n */\nfunction computeMinSampleSize(meta) {\n  const scale = meta.iScale;\n  const values = getAllScaleValues(scale, meta.type);\n  let min = scale._length;\n  let i, ilen, curr, prev;\n  const updateMinAndPrev = () => {\n    if (curr === 32767 || curr === -32768) {\n      // Ignore truncated pixels\n      return;\n    }\n    if (defined(prev)) {\n      // curr - prev === 0 is ignored\n      min = Math.min(min, Math.abs(curr - prev) || min);\n    }\n    prev = curr;\n  };\n\n  for (i = 0, ilen = values.length; i < ilen; ++i) {\n    curr = scale.getPixelForValue(values[i]);\n    updateMinAndPrev();\n  }\n\n  prev = undefined;\n  for (i = 0, ilen = scale.ticks.length; i < ilen; ++i) {\n    curr = scale.getPixelForTick(i);\n    updateMinAndPrev();\n  }\n\n  return min;\n}\n\n/**\n * Computes an \"ideal\" category based on the absolute bar thickness or, if undefined or null,\n * uses the smallest interval (see computeMinSampleSize) that prevents bar overlapping. This\n * mode currently always generates bars equally sized (until we introduce scriptable options?).\n * @private\n */\nfunction computeFitCategoryTraits(index, ruler, options, stackCount) {\n  const thickness = options.barThickness;\n  let size, ratio;\n\n  if (isNullOrUndef(thickness)) {\n    size = ruler.min * options.categoryPercentage;\n    ratio = options.barPercentage;\n  } else {\n    // When bar thickness is enforced, category and bar percentages are ignored.\n    // Note(SB): we could add support for relative bar thickness (e.g. barThickness: '50%')\n    // and deprecate barPercentage since this value is ignored when thickness is absolute.\n    size = thickness * stackCount;\n    ratio = 1;\n  }\n\n  return {\n    chunk: size / stackCount,\n    ratio,\n    start: ruler.pixels[index] - (size / 2)\n  };\n}\n\n/**\n * Computes an \"optimal\" category that globally arranges bars side by side (no gap when\n * percentage options are 1), based on the previous and following categories. This mode\n * generates bars with different widths when data are not evenly spaced.\n * @private\n */\nfunction computeFlexCategoryTraits(index, ruler, options, stackCount) {\n  const pixels = ruler.pixels;\n  const curr = pixels[index];\n  let prev = index > 0 ? pixels[index - 1] : null;\n  let next = index < pixels.length - 1 ? pixels[index + 1] : null;\n  const percent = options.categoryPercentage;\n\n  if (prev === null) {\n    // first data: its size is double based on the next point or,\n    // if it's also the last data, we use the scale size.\n    prev = curr - (next === null ? ruler.end - ruler.start : next - curr);\n  }\n\n  if (next === null) {\n    // last data: its size is also double based on the previous point.\n    next = curr + curr - prev;\n  }\n\n  const start = curr - (curr - Math.min(prev, next)) / 2 * percent;\n  const size = Math.abs(next - prev) / 2 * percent;\n\n  return {\n    chunk: size / stackCount,\n    ratio: options.barPercentage,\n    start\n  };\n}\n\nfunction parseFloatBar(entry, item, vScale, i) {\n  const startValue = vScale.parse(entry[0], i);\n  const endValue = vScale.parse(entry[1], i);\n  const min = Math.min(startValue, endValue);\n  const max = Math.max(startValue, endValue);\n  let barStart = min;\n  let barEnd = max;\n\n  if (Math.abs(min) > Math.abs(max)) {\n    barStart = max;\n    barEnd = min;\n  }\n\n  // Store `barEnd` (furthest away from origin) as parsed value,\n  // to make stacking straight forward\n  item[vScale.axis] = barEnd;\n\n  item._custom = {\n    barStart,\n    barEnd,\n    start: startValue,\n    end: endValue,\n    min,\n    max\n  };\n}\n\nfunction parseValue(entry, item, vScale, i) {\n  if (isArray(entry)) {\n    parseFloatBar(entry, item, vScale, i);\n  } else {\n    item[vScale.axis] = vScale.parse(entry, i);\n  }\n  return item;\n}\n\nfunction parseArrayOrPrimitive(meta, data, start, count) {\n  const iScale = meta.iScale;\n  const vScale = meta.vScale;\n  const labels = iScale.getLabels();\n  const singleScale = iScale === vScale;\n  const parsed = [];\n  let i, ilen, item, entry;\n\n  for (i = start, ilen = start + count; i < ilen; ++i) {\n    entry = data[i];\n    item = {};\n    item[iScale.axis] = singleScale || iScale.parse(labels[i], i);\n    parsed.push(parseValue(entry, item, vScale, i));\n  }\n  return parsed;\n}\n\nfunction isFloatBar(custom) {\n  return custom && custom.barStart !== undefined && custom.barEnd !== undefined;\n}\n\nfunction barSign(size, vScale, actualBase) {\n  if (size !== 0) {\n    return sign(size);\n  }\n  return (vScale.isHorizontal() ? 1 : -1) * (vScale.min >= actualBase ? 1 : -1);\n}\n\nfunction borderProps(properties) {\n  let reverse, start, end, top, bottom;\n  if (properties.horizontal) {\n    reverse = properties.base > properties.x;\n    start = 'left';\n    end = 'right';\n  } else {\n    reverse = properties.base < properties.y;\n    start = 'bottom';\n    end = 'top';\n  }\n  if (reverse) {\n    top = 'end';\n    bottom = 'start';\n  } else {\n    top = 'start';\n    bottom = 'end';\n  }\n  return {start, end, reverse, top, bottom};\n}\n\nfunction setBorderSkipped(properties, options, stack, index) {\n  let edge = options.borderSkipped;\n  const res = {};\n\n  if (!edge) {\n    properties.borderSkipped = res;\n    return;\n  }\n\n  if (edge === true) {\n    properties.borderSkipped = {top: true, right: true, bottom: true, left: true};\n    return;\n  }\n\n  const {start, end, reverse, top, bottom} = borderProps(properties);\n\n  if (edge === 'middle' && stack) {\n    properties.enableBorderRadius = true;\n    if ((stack._top || 0) === index) {\n      edge = top;\n    } else if ((stack._bottom || 0) === index) {\n      edge = bottom;\n    } else {\n      res[parseEdge(bottom, start, end, reverse)] = true;\n      edge = top;\n    }\n  }\n\n  res[parseEdge(edge, start, end, reverse)] = true;\n  properties.borderSkipped = res;\n}\n\nfunction parseEdge(edge, a, b, reverse) {\n  if (reverse) {\n    edge = swap(edge, a, b);\n    edge = startEnd(edge, b, a);\n  } else {\n    edge = startEnd(edge, a, b);\n  }\n  return edge;\n}\n\nfunction swap(orig, v1, v2) {\n  return orig === v1 ? v2 : orig === v2 ? v1 : orig;\n}\n\nfunction startEnd(v, start, end) {\n  return v === 'start' ? start : v === 'end' ? end : v;\n}\n\nfunction setInflateAmount(properties, {inflateAmount}, ratio) {\n  properties.inflateAmount = inflateAmount === 'auto'\n    ? ratio === 1 ? 0.33 : 0\n    : inflateAmount;\n}\n\nexport default class BarController extends DatasetController {\n\n  static id = 'bar';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    datasetElementType: false,\n    dataElementType: 'bar',\n\n    categoryPercentage: 0.8,\n    barPercentage: 0.9,\n    grouped: true,\n\n    animations: {\n      numbers: {\n        type: 'number',\n        properties: ['x', 'y', 'base', 'width', 'height']\n      }\n    }\n  };\n\n  /**\n   * @type {any}\n   */\n  static overrides = {\n    scales: {\n      _index_: {\n        type: 'category',\n        offset: true,\n        grid: {\n          offset: true\n        }\n      },\n      _value_: {\n        type: 'linear',\n        beginAtZero: true,\n      }\n    }\n  };\n\n\n  /**\n\t * Overriding primitive data parsing since we support mixed primitive/array\n\t * data for float bars\n\t * @protected\n\t */\n  parsePrimitiveData(meta, data, start, count) {\n    return parseArrayOrPrimitive(meta, data, start, count);\n  }\n\n  /**\n\t * Overriding array data parsing since we support mixed primitive/array\n\t * data for float bars\n\t * @protected\n\t */\n  parseArrayData(meta, data, start, count) {\n    return parseArrayOrPrimitive(meta, data, start, count);\n  }\n\n  /**\n\t * Overriding object data parsing since we support mixed primitive/array\n\t * value-scale data for float bars\n\t * @protected\n\t */\n  parseObjectData(meta, data, start, count) {\n    const {iScale, vScale} = meta;\n    const {xAxisKey = 'x', yAxisKey = 'y'} = this._parsing;\n    const iAxisKey = iScale.axis === 'x' ? xAxisKey : yAxisKey;\n    const vAxisKey = vScale.axis === 'x' ? xAxisKey : yAxisKey;\n    const parsed = [];\n    let i, ilen, item, obj;\n    for (i = start, ilen = start + count; i < ilen; ++i) {\n      obj = data[i];\n      item = {};\n      item[iScale.axis] = iScale.parse(resolveObjectKey(obj, iAxisKey), i);\n      parsed.push(parseValue(resolveObjectKey(obj, vAxisKey), item, vScale, i));\n    }\n    return parsed;\n  }\n\n  /**\n\t * @protected\n\t */\n  updateRangeFromParsed(range, scale, parsed, stack) {\n    super.updateRangeFromParsed(range, scale, parsed, stack);\n    const custom = parsed._custom;\n    if (custom && scale === this._cachedMeta.vScale) {\n      // float bar: only one end of the bar is considered by `super`\n      range.min = Math.min(range.min, custom.min);\n      range.max = Math.max(range.max, custom.max);\n    }\n  }\n\n  /**\n\t * @return {number|boolean}\n\t * @protected\n\t */\n  getMaxOverflow() {\n    return 0;\n  }\n\n  /**\n\t * @protected\n\t */\n  getLabelAndValue(index) {\n    const meta = this._cachedMeta;\n    const {iScale, vScale} = meta;\n    const parsed = this.getParsed(index);\n    const custom = parsed._custom;\n    const value = isFloatBar(custom)\n      ? '[' + custom.start + ', ' + custom.end + ']'\n      : '' + vScale.getLabelForValue(parsed[vScale.axis]);\n\n    return {\n      label: '' + iScale.getLabelForValue(parsed[iScale.axis]),\n      value\n    };\n  }\n\n  initialize() {\n    this.enableOptionSharing = true;\n\n    super.initialize();\n\n    const meta = this._cachedMeta;\n    meta.stack = this.getDataset().stack;\n  }\n\n  update(mode) {\n    const meta = this._cachedMeta;\n    this.updateElements(meta.data, 0, meta.data.length, mode);\n  }\n\n  updateElements(bars, start, count, mode) {\n    const reset = mode === 'reset';\n    const {index, _cachedMeta: {vScale}} = this;\n    const base = vScale.getBasePixel();\n    const horizontal = vScale.isHorizontal();\n    const ruler = this._getRuler();\n    const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n\n    for (let i = start; i < start + count; i++) {\n      const parsed = this.getParsed(i);\n      const vpixels = reset || isNullOrUndef(parsed[vScale.axis]) ? {base, head: base} : this._calculateBarValuePixels(i);\n      const ipixels = this._calculateBarIndexPixels(i, ruler);\n      const stack = (parsed._stacks || {})[vScale.axis];\n\n      const properties = {\n        horizontal,\n        base: vpixels.base,\n        enableBorderRadius: !stack || isFloatBar(parsed._custom) || (index === stack._top || index === stack._bottom),\n        x: horizontal ? vpixels.head : ipixels.center,\n        y: horizontal ? ipixels.center : vpixels.head,\n        height: horizontal ? ipixels.size : Math.abs(vpixels.size),\n        width: horizontal ? Math.abs(vpixels.size) : ipixels.size\n      };\n\n      if (includeOptions) {\n        properties.options = sharedOptions || this.resolveDataElementOptions(i, bars[i].active ? 'active' : mode);\n      }\n      const options = properties.options || bars[i].options;\n      setBorderSkipped(properties, options, stack, index);\n      setInflateAmount(properties, options, ruler.ratio);\n      this.updateElement(bars[i], i, properties, mode);\n    }\n  }\n\n  /**\n\t * Returns the stacks based on groups and bar visibility.\n\t * @param {number} [last] - The dataset index\n\t * @param {number} [dataIndex] - The data index of the ruler\n\t * @returns {string[]} The list of stack IDs\n\t * @private\n\t */\n  _getStacks(last, dataIndex) {\n    const {iScale} = this._cachedMeta;\n    const metasets = iScale.getMatchingVisibleMetas(this._type)\n      .filter(meta => meta.controller.options.grouped);\n    const stacked = iScale.options.stacked;\n    const stacks = [];\n\n    const skipNull = (meta) => {\n      const parsed = meta.controller.getParsed(dataIndex);\n      const val = parsed && parsed[meta.vScale.axis];\n\n      if (isNullOrUndef(val) || isNaN(val)) {\n        return true;\n      }\n    };\n\n    for (const meta of metasets) {\n      if (dataIndex !== undefined && skipNull(meta)) {\n        continue;\n      }\n\n      // stacked   | meta.stack\n      //           | found | not found | undefined\n      // false     |   x   |     x     |     x\n      // true      |       |     x     |\n      // undefined |       |     x     |     x\n      if (stacked === false || stacks.indexOf(meta.stack) === -1 ||\n\t\t\t\t(stacked === undefined && meta.stack === undefined)) {\n        stacks.push(meta.stack);\n      }\n      if (meta.index === last) {\n        break;\n      }\n    }\n\n    // No stacks? that means there is no visible data. Let's still initialize an `undefined`\n    // stack where possible invisible bars will be located.\n    // https://github.com/chartjs/Chart.js/issues/6368\n    if (!stacks.length) {\n      stacks.push(undefined);\n    }\n\n    return stacks;\n  }\n\n  /**\n\t * Returns the effective number of stacks based on groups and bar visibility.\n\t * @private\n\t */\n  _getStackCount(index) {\n    return this._getStacks(undefined, index).length;\n  }\n\n  /**\n\t * Returns the stack index for the given dataset based on groups and bar visibility.\n\t * @param {number} [datasetIndex] - The dataset index\n\t * @param {string} [name] - The stack name to find\n   * @param {number} [dataIndex]\n\t * @returns {number} The stack index\n\t * @private\n\t */\n  _getStackIndex(datasetIndex, name, dataIndex) {\n    const stacks = this._getStacks(datasetIndex, dataIndex);\n    const index = (name !== undefined)\n      ? stacks.indexOf(name)\n      : -1; // indexOf returns -1 if element is not present\n\n    return (index === -1)\n      ? stacks.length - 1\n      : index;\n  }\n\n  /**\n\t * @private\n\t */\n  _getRuler() {\n    const opts = this.options;\n    const meta = this._cachedMeta;\n    const iScale = meta.iScale;\n    const pixels = [];\n    let i, ilen;\n\n    for (i = 0, ilen = meta.data.length; i < ilen; ++i) {\n      pixels.push(iScale.getPixelForValue(this.getParsed(i)[iScale.axis], i));\n    }\n\n    const barThickness = opts.barThickness;\n    const min = barThickness || computeMinSampleSize(meta);\n\n    return {\n      min,\n      pixels,\n      start: iScale._startPixel,\n      end: iScale._endPixel,\n      stackCount: this._getStackCount(),\n      scale: iScale,\n      grouped: opts.grouped,\n      // bar thickness ratio used for non-grouped bars\n      ratio: barThickness ? 1 : opts.categoryPercentage * opts.barPercentage\n    };\n  }\n\n  /**\n\t * Note: pixel values are not clamped to the scale area.\n\t * @private\n\t */\n  _calculateBarValuePixels(index) {\n    const {_cachedMeta: {vScale, _stacked}, options: {base: baseValue, minBarLength}} = this;\n    const actualBase = baseValue || 0;\n    const parsed = this.getParsed(index);\n    const custom = parsed._custom;\n    const floating = isFloatBar(custom);\n    let value = parsed[vScale.axis];\n    let start = 0;\n    let length = _stacked ? this.applyStack(vScale, parsed, _stacked) : value;\n    let head, size;\n\n    if (length !== value) {\n      start = length - value;\n      length = value;\n    }\n\n    if (floating) {\n      value = custom.barStart;\n      length = custom.barEnd - custom.barStart;\n      // bars crossing origin are not stacked\n      if (value !== 0 && sign(value) !== sign(custom.barEnd)) {\n        start = 0;\n      }\n      start += value;\n    }\n\n    const startValue = !isNullOrUndef(baseValue) && !floating ? baseValue : start;\n    let base = vScale.getPixelForValue(startValue);\n\n    if (this.chart.getDataVisibility(index)) {\n      head = vScale.getPixelForValue(start + length);\n    } else {\n      // When not visible, no height\n      head = base;\n    }\n\n    size = head - base;\n\n    if (Math.abs(size) < minBarLength) {\n      size = barSign(size, vScale, actualBase) * minBarLength;\n      if (value === actualBase) {\n        base -= size / 2;\n      }\n      const startPixel = vScale.getPixelForDecimal(0);\n      const endPixel = vScale.getPixelForDecimal(1);\n      const min = Math.min(startPixel, endPixel);\n      const max = Math.max(startPixel, endPixel);\n      base = Math.max(Math.min(base, max), min);\n      head = base + size;\n    }\n\n    if (base === vScale.getPixelForValue(actualBase)) {\n      const halfGrid = sign(size) * vScale.getLineWidthForValue(actualBase) / 2;\n      base += halfGrid;\n      size -= halfGrid;\n    }\n\n    return {\n      size,\n      base,\n      head,\n      center: head + size / 2\n    };\n  }\n\n  /**\n\t * @private\n\t */\n  _calculateBarIndexPixels(index, ruler) {\n    const scale = ruler.scale;\n    const options = this.options;\n    const skipNull = options.skipNull;\n    const maxBarThickness = valueOrDefault(options.maxBarThickness, Infinity);\n    let center, size;\n    if (ruler.grouped) {\n      const stackCount = skipNull ? this._getStackCount(index) : ruler.stackCount;\n      const range = options.barThickness === 'flex'\n        ? computeFlexCategoryTraits(index, ruler, options, stackCount)\n        : computeFitCategoryTraits(index, ruler, options, stackCount);\n\n      const stackIndex = this._getStackIndex(this.index, this._cachedMeta.stack, skipNull ? index : undefined);\n      center = range.start + (range.chunk * stackIndex) + (range.chunk / 2);\n      size = Math.min(maxBarThickness, range.chunk * range.ratio);\n    } else {\n      // For non-grouped bar charts, exact pixel values are used\n      center = scale.getPixelForValue(this.getParsed(index)[scale.axis], index);\n      size = Math.min(maxBarThickness, ruler.min * ruler.ratio);\n    }\n\n    return {\n      base: center - size / 2,\n      head: center + size / 2,\n      center,\n      size\n    };\n  }\n\n  draw() {\n    const meta = this._cachedMeta;\n    const vScale = meta.vScale;\n    const rects = meta.data;\n    const ilen = rects.length;\n    let i = 0;\n\n    for (; i < ilen; ++i) {\n      if (this.getParsed(i)[vScale.axis] !== null) {\n        rects[i].draw(this._ctx);\n      }\n    }\n  }\n\n}\n","import DatasetController from '../core/core.datasetController';\nimport {isObject, resolveObjectKey, toPercentage, toDimension, valueOrDefault} from '../helpers/helpers.core';\nimport {formatNumber} from '../helpers/helpers.intl';\nimport {toRadians, PI, TAU, HALF_PI, _angleBetween} from '../helpers/helpers.math';\n\n/**\n * @typedef { import(\"../core/core.controller\").default } Chart\n */\n\nfunction getRatioAndOffset(rotation, circumference, cutout) {\n  let ratioX = 1;\n  let ratioY = 1;\n  let offsetX = 0;\n  let offsetY = 0;\n  // If the chart's circumference isn't a full circle, calculate size as a ratio of the width/height of the arc\n  if (circumference < TAU) {\n    const startAngle = rotation;\n    const endAngle = startAngle + circumference;\n    const startX = Math.cos(startAngle);\n    const startY = Math.sin(startAngle);\n    const endX = Math.cos(endAngle);\n    const endY = Math.sin(endAngle);\n    const calcMax = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? 1 : Math.max(a, a * cutout, b, b * cutout);\n    const calcMin = (angle, a, b) => _angleBetween(angle, startAngle, endAngle, true) ? -1 : Math.min(a, a * cutout, b, b * cutout);\n    const maxX = calcMax(0, startX, endX);\n    const maxY = calcMax(HALF_PI, startY, endY);\n    const minX = calcMin(PI, startX, endX);\n    const minY = calcMin(PI + HALF_PI, startY, endY);\n    ratioX = (maxX - minX) / 2;\n    ratioY = (maxY - minY) / 2;\n    offsetX = -(maxX + minX) / 2;\n    offsetY = -(maxY + minY) / 2;\n  }\n  return {ratioX, ratioY, offsetX, offsetY};\n}\n\nexport default class DoughnutController extends DatasetController {\n\n  static id = 'doughnut';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    datasetElementType: false,\n    dataElementType: 'arc',\n    animation: {\n      // Boolean - Whether we animate the rotation of the Doughnut\n      animateRotate: true,\n      // Boolean - Whether we animate scaling the Doughnut from the centre\n      animateScale: false\n    },\n    animations: {\n      numbers: {\n        type: 'number',\n        properties: ['circumference', 'endAngle', 'innerRadius', 'outerRadius', 'startAngle', 'x', 'y', 'offset', 'borderWidth', 'spacing']\n      },\n    },\n    // The percentage of the chart that we cut out of the middle.\n    cutout: '50%',\n\n    // The rotation of the chart, where the first data arc begins.\n    rotation: 0,\n\n    // The total circumference of the chart.\n    circumference: 360,\n\n    // The outr radius of the chart\n    radius: '100%',\n\n    // Spacing between arcs\n    spacing: 0,\n\n    indexAxis: 'r',\n  };\n\n  static descriptors = {\n    _scriptable: (name) => name !== 'spacing',\n    _indexable: (name) => name !== 'spacing',\n  };\n\n  /**\n   * @type {any}\n   */\n  static overrides = {\n    aspectRatio: 1,\n\n    // Need to override these to give a nice default\n    plugins: {\n      legend: {\n        labels: {\n          generateLabels(chart) {\n            const data = chart.data;\n            if (data.labels.length && data.datasets.length) {\n              const {labels: {pointStyle, color}} = chart.legend.options;\n\n              return data.labels.map((label, i) => {\n                const meta = chart.getDatasetMeta(0);\n                const style = meta.controller.getStyle(i);\n\n                return {\n                  text: label,\n                  fillStyle: style.backgroundColor,\n                  strokeStyle: style.borderColor,\n                  fontColor: color,\n                  lineWidth: style.borderWidth,\n                  pointStyle: pointStyle,\n                  hidden: !chart.getDataVisibility(i),\n\n                  // Extra data used for toggling the correct item\n                  index: i\n                };\n              });\n            }\n            return [];\n          }\n        },\n\n        onClick(e, legendItem, legend) {\n          legend.chart.toggleDataVisibility(legendItem.index);\n          legend.chart.update();\n        }\n      }\n    }\n  };\n\n  constructor(chart, datasetIndex) {\n    super(chart, datasetIndex);\n\n    this.enableOptionSharing = true;\n    this.innerRadius = undefined;\n    this.outerRadius = undefined;\n    this.offsetX = undefined;\n    this.offsetY = undefined;\n  }\n\n  linkScales() {}\n\n  /**\n\t * Override data parsing, since we are not using scales\n\t */\n  parse(start, count) {\n    const data = this.getDataset().data;\n    const meta = this._cachedMeta;\n\n    if (this._parsing === false) {\n      meta._parsed = data;\n    } else {\n      let getter = (i) => +data[i];\n\n      if (isObject(data[start])) {\n        const {key = 'value'} = this._parsing;\n        getter = (i) => +resolveObjectKey(data[i], key);\n      }\n\n      let i, ilen;\n      for (i = start, ilen = start + count; i < ilen; ++i) {\n        meta._parsed[i] = getter(i);\n      }\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _getRotation() {\n    return toRadians(this.options.rotation - 90);\n  }\n\n  /**\n\t * @private\n\t */\n  _getCircumference() {\n    return toRadians(this.options.circumference);\n  }\n\n  /**\n\t * Get the maximal rotation & circumference extents\n\t * across all visible datasets.\n\t */\n  _getRotationExtents() {\n    let min = TAU;\n    let max = -TAU;\n\n    for (let i = 0; i < this.chart.data.datasets.length; ++i) {\n      if (this.chart.isDatasetVisible(i) && this.chart.getDatasetMeta(i).type === this._type) {\n        const controller = this.chart.getDatasetMeta(i).controller;\n        const rotation = controller._getRotation();\n        const circumference = controller._getCircumference();\n\n        min = Math.min(min, rotation);\n        max = Math.max(max, rotation + circumference);\n      }\n    }\n\n    return {\n      rotation: min,\n      circumference: max - min,\n    };\n  }\n\n  /**\n\t * @param {string} mode\n\t */\n  update(mode) {\n    const chart = this.chart;\n    const {chartArea} = chart;\n    const meta = this._cachedMeta;\n    const arcs = meta.data;\n    const spacing = this.getMaxBorderWidth() + this.getMaxOffset(arcs) + this.options.spacing;\n    const maxSize = Math.max((Math.min(chartArea.width, chartArea.height) - spacing) / 2, 0);\n    const cutout = Math.min(toPercentage(this.options.cutout, maxSize), 1);\n    const chartWeight = this._getRingWeight(this.index);\n\n    // Compute the maximal rotation & circumference limits.\n    // If we only consider our dataset, this can cause problems when two datasets\n    // are both less than a circle with different rotations (starting angles)\n    const {circumference, rotation} = this._getRotationExtents();\n    const {ratioX, ratioY, offsetX, offsetY} = getRatioAndOffset(rotation, circumference, cutout);\n    const maxWidth = (chartArea.width - spacing) / ratioX;\n    const maxHeight = (chartArea.height - spacing) / ratioY;\n    const maxRadius = Math.max(Math.min(maxWidth, maxHeight) / 2, 0);\n    const outerRadius = toDimension(this.options.radius, maxRadius);\n    const innerRadius = Math.max(outerRadius * cutout, 0);\n    const radiusLength = (outerRadius - innerRadius) / this._getVisibleDatasetWeightTotal();\n    this.offsetX = offsetX * outerRadius;\n    this.offsetY = offsetY * outerRadius;\n\n    meta.total = this.calculateTotal();\n\n    this.outerRadius = outerRadius - radiusLength * this._getRingWeightOffset(this.index);\n    this.innerRadius = Math.max(this.outerRadius - radiusLength * chartWeight, 0);\n\n    this.updateElements(arcs, 0, arcs.length, mode);\n  }\n\n  /**\n   * @private\n   */\n  _circumference(i, reset) {\n    const opts = this.options;\n    const meta = this._cachedMeta;\n    const circumference = this._getCircumference();\n    if ((reset && opts.animation.animateRotate) || !this.chart.getDataVisibility(i) || meta._parsed[i] === null || meta.data[i].hidden) {\n      return 0;\n    }\n    return this.calculateCircumference(meta._parsed[i] * circumference / TAU);\n  }\n\n  updateElements(arcs, start, count, mode) {\n    const reset = mode === 'reset';\n    const chart = this.chart;\n    const chartArea = chart.chartArea;\n    const opts = chart.options;\n    const animationOpts = opts.animation;\n    const centerX = (chartArea.left + chartArea.right) / 2;\n    const centerY = (chartArea.top + chartArea.bottom) / 2;\n    const animateScale = reset && animationOpts.animateScale;\n    const innerRadius = animateScale ? 0 : this.innerRadius;\n    const outerRadius = animateScale ? 0 : this.outerRadius;\n    const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n    let startAngle = this._getRotation();\n    let i;\n\n    for (i = 0; i < start; ++i) {\n      startAngle += this._circumference(i, reset);\n    }\n\n    for (i = start; i < start + count; ++i) {\n      const circumference = this._circumference(i, reset);\n      const arc = arcs[i];\n      const properties = {\n        x: centerX + this.offsetX,\n        y: centerY + this.offsetY,\n        startAngle,\n        endAngle: startAngle + circumference,\n        circumference,\n        outerRadius,\n        innerRadius\n      };\n      if (includeOptions) {\n        properties.options = sharedOptions || this.resolveDataElementOptions(i, arc.active ? 'active' : mode);\n      }\n      startAngle += circumference;\n\n      this.updateElement(arc, i, properties, mode);\n    }\n  }\n\n  calculateTotal() {\n    const meta = this._cachedMeta;\n    const metaData = meta.data;\n    let total = 0;\n    let i;\n\n    for (i = 0; i < metaData.length; i++) {\n      const value = meta._parsed[i];\n      if (value !== null && !isNaN(value) && this.chart.getDataVisibility(i) && !metaData[i].hidden) {\n        total += Math.abs(value);\n      }\n    }\n\n    return total;\n  }\n\n  calculateCircumference(value) {\n    const total = this._cachedMeta.total;\n    if (total > 0 && !isNaN(value)) {\n      return TAU * (Math.abs(value) / total);\n    }\n    return 0;\n  }\n\n  getLabelAndValue(index) {\n    const meta = this._cachedMeta;\n    const chart = this.chart;\n    const labels = chart.data.labels || [];\n    const value = formatNumber(meta._parsed[index], chart.options.locale);\n\n    return {\n      label: labels[index] || '',\n      value,\n    };\n  }\n\n  getMaxBorderWidth(arcs) {\n    let max = 0;\n    const chart = this.chart;\n    let i, ilen, meta, controller, options;\n\n    if (!arcs) {\n      // Find the outmost visible dataset\n      for (i = 0, ilen = chart.data.datasets.length; i < ilen; ++i) {\n        if (chart.isDatasetVisible(i)) {\n          meta = chart.getDatasetMeta(i);\n          arcs = meta.data;\n          controller = meta.controller;\n          break;\n        }\n      }\n    }\n\n    if (!arcs) {\n      return 0;\n    }\n\n    for (i = 0, ilen = arcs.length; i < ilen; ++i) {\n      options = controller.resolveDataElementOptions(i);\n      if (options.borderAlign !== 'inner') {\n        max = Math.max(max, options.borderWidth || 0, options.hoverBorderWidth || 0);\n      }\n    }\n    return max;\n  }\n\n  getMaxOffset(arcs) {\n    let max = 0;\n\n    for (let i = 0, ilen = arcs.length; i < ilen; ++i) {\n      const options = this.resolveDataElementOptions(i);\n      max = Math.max(max, options.offset || 0, options.hoverOffset || 0);\n    }\n    return max;\n  }\n\n  /**\n\t * Get radius length offset of the dataset in relation to the visible datasets weights. This allows determining the inner and outer radius correctly\n\t * @private\n\t */\n  _getRingWeightOffset(datasetIndex) {\n    let ringWeightOffset = 0;\n\n    for (let i = 0; i < datasetIndex; ++i) {\n      if (this.chart.isDatasetVisible(i)) {\n        ringWeightOffset += this._getRingWeight(i);\n      }\n    }\n\n    return ringWeightOffset;\n  }\n\n  /**\n\t * @private\n\t */\n  _getRingWeight(datasetIndex) {\n    return Math.max(valueOrDefault(this.chart.data.datasets[datasetIndex].weight, 1), 0);\n  }\n\n  /**\n\t * Returns the sum of all visible data set weights.\n\t * @private\n\t */\n  _getVisibleDatasetWeightTotal() {\n    return this._getRingWeightOffset(this.chart.data.datasets.length) || 1;\n  }\n}\n","import DatasetController from '../core/core.datasetController';\nimport {valueOrDefault} from '../helpers/helpers.core';\n\nexport default class BubbleController extends DatasetController {\n\n  static id = 'bubble';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    datasetElementType: false,\n    dataElementType: 'point',\n\n    animations: {\n      numbers: {\n        type: 'number',\n        properties: ['x', 'y', 'borderWidth', 'radius']\n      }\n    }\n  };\n\n  /**\n   * @type {any}\n   */\n  static overrides = {\n    scales: {\n      x: {\n        type: 'linear'\n      },\n      y: {\n        type: 'linear'\n      }\n    }\n  };\n\n  initialize() {\n    this.enableOptionSharing = true;\n    super.initialize();\n  }\n\n  /**\n\t * Parse array of primitive values\n\t * @protected\n\t */\n  parsePrimitiveData(meta, data, start, count) {\n    const parsed = super.parsePrimitiveData(meta, data, start, count);\n    for (let i = 0; i < parsed.length; i++) {\n      parsed[i]._custom = this.resolveDataElementOptions(i + start).radius;\n    }\n    return parsed;\n  }\n\n  /**\n\t * Parse array of arrays\n\t * @protected\n\t */\n  parseArrayData(meta, data, start, count) {\n    const parsed = super.parseArrayData(meta, data, start, count);\n    for (let i = 0; i < parsed.length; i++) {\n      const item = data[start + i];\n      parsed[i]._custom = valueOrDefault(item[2], this.resolveDataElementOptions(i + start).radius);\n    }\n    return parsed;\n  }\n\n  /**\n\t * Parse array of objects\n\t * @protected\n\t */\n  parseObjectData(meta, data, start, count) {\n    const parsed = super.parseObjectData(meta, data, start, count);\n    for (let i = 0; i < parsed.length; i++) {\n      const item = data[start + i];\n      parsed[i]._custom = valueOrDefault(item && item.r && +item.r, this.resolveDataElementOptions(i + start).radius);\n    }\n    return parsed;\n  }\n\n  /**\n\t * @protected\n\t */\n  getMaxOverflow() {\n    const data = this._cachedMeta.data;\n\n    let max = 0;\n    for (let i = data.length - 1; i >= 0; --i) {\n      max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);\n    }\n    return max > 0 && max;\n  }\n\n  /**\n\t * @protected\n\t */\n  getLabelAndValue(index) {\n    const meta = this._cachedMeta;\n    const labels = this.chart.data.labels || [];\n    const {xScale, yScale} = meta;\n    const parsed = this.getParsed(index);\n    const x = xScale.getLabelForValue(parsed.x);\n    const y = yScale.getLabelForValue(parsed.y);\n    const r = parsed._custom;\n\n    return {\n      label: labels[index] || '',\n      value: '(' + x + ', ' + y + (r ? ', ' + r : '') + ')'\n    };\n  }\n\n  update(mode) {\n    const points = this._cachedMeta.data;\n\n    // Update Points\n    this.updateElements(points, 0, points.length, mode);\n  }\n\n  updateElements(points, start, count, mode) {\n    const reset = mode === 'reset';\n    const {iScale, vScale} = this._cachedMeta;\n    const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n    const iAxis = iScale.axis;\n    const vAxis = vScale.axis;\n\n    for (let i = start; i < start + count; i++) {\n      const point = points[i];\n      const parsed = !reset && this.getParsed(i);\n      const properties = {};\n      const iPixel = properties[iAxis] = reset ? iScale.getPixelForDecimal(0.5) : iScale.getPixelForValue(parsed[iAxis]);\n      const vPixel = properties[vAxis] = reset ? vScale.getBasePixel() : vScale.getPixelForValue(parsed[vAxis]);\n\n      properties.skip = isNaN(iPixel) || isNaN(vPixel);\n\n      if (includeOptions) {\n        properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n\n        if (reset) {\n          properties.options.radius = 0;\n        }\n      }\n\n      this.updateElement(point, i, properties, mode);\n    }\n  }\n\n  /**\n\t * @param {number} index\n\t * @param {string} [mode]\n\t * @protected\n\t */\n  resolveDataElementOptions(index, mode) {\n    const parsed = this.getParsed(index);\n    let values = super.resolveDataElementOptions(index, mode);\n\n    // In case values were cached (and thus frozen), we need to clone the values\n    if (values.$shared) {\n      values = Object.assign({}, values, {$shared: false});\n    }\n\n    // Custom radius resolution\n    const radius = values.radius;\n    if (mode !== 'active') {\n      values.radius = 0;\n    }\n    values.radius += valueOrDefault(parsed && parsed._custom, radius);\n\n    return values;\n  }\n}\n","import DatasetController from '../core/core.datasetController';\nimport {isNullOrUndef} from '../helpers';\nimport {isNumber} from '../helpers/helpers.math';\nimport {_getStartAndCountOfVisiblePoints, _scaleRangesChanged} from '../helpers/helpers.extras';\n\nexport default class LineController extends DatasetController {\n\n  static id = 'line';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    datasetElementType: 'line',\n    dataElementType: 'point',\n\n    showLine: true,\n    spanGaps: false,\n  };\n\n  /**\n   * @type {any}\n   */\n  static overrides = {\n    scales: {\n      _index_: {\n        type: 'category',\n      },\n      _value_: {\n        type: 'linear',\n      },\n    }\n  };\n\n  initialize() {\n    this.enableOptionSharing = true;\n    this.supportsDecimation = true;\n    super.initialize();\n  }\n\n  update(mode) {\n    const meta = this._cachedMeta;\n    const {dataset: line, data: points = [], _dataset} = meta;\n    // @ts-ignore\n    const animationsDisabled = this.chart._animationsDisabled;\n    let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);\n\n    this._drawStart = start;\n    this._drawCount = count;\n\n    if (_scaleRangesChanged(meta)) {\n      start = 0;\n      count = points.length;\n    }\n\n    // Update Line\n    line._chart = this.chart;\n    line._datasetIndex = this.index;\n    line._decimated = !!_dataset._decimated;\n    line.points = points;\n\n    const options = this.resolveDatasetElementOptions(mode);\n    if (!this.options.showLine) {\n      options.borderWidth = 0;\n    }\n    options.segment = this.options.segment;\n    this.updateElement(line, undefined, {\n      animated: !animationsDisabled,\n      options\n    }, mode);\n\n    // Update Points\n    this.updateElements(points, start, count, mode);\n  }\n\n  updateElements(points, start, count, mode) {\n    const reset = mode === 'reset';\n    const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;\n    const {sharedOptions, includeOptions} = this._getSharedOptions(start, mode);\n    const iAxis = iScale.axis;\n    const vAxis = vScale.axis;\n    const {spanGaps, segment} = this.options;\n    const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;\n    const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';\n    const end = start + count;\n    const pointsCount = points.length;\n    let prevParsed = start > 0 && this.getParsed(start - 1);\n\n    for (let i = 0; i < pointsCount; ++i) {\n      const point = points[i];\n      const properties = directUpdate ? point : {};\n\n      if (i < start || i >= end) {\n        properties.skip = true;\n        continue;\n      }\n\n      const parsed = this.getParsed(i);\n      const nullData = isNullOrUndef(parsed[vAxis]);\n      const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);\n      const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);\n\n      properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;\n      properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;\n      if (segment) {\n        properties.parsed = parsed;\n        properties.raw = _dataset.data[i];\n      }\n\n      if (includeOptions) {\n        properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n      }\n\n      if (!directUpdate) {\n        this.updateElement(point, i, properties, mode);\n      }\n\n      prevParsed = parsed;\n    }\n  }\n\n  /**\n\t * @protected\n\t */\n  getMaxOverflow() {\n    const meta = this._cachedMeta;\n    const dataset = meta.dataset;\n    const border = dataset.options && dataset.options.borderWidth || 0;\n    const data = meta.data || [];\n    if (!data.length) {\n      return border;\n    }\n    const firstPoint = data[0].size(this.resolveDataElementOptions(0));\n    const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));\n    return Math.max(border, firstPoint, lastPoint) / 2;\n  }\n\n  draw() {\n    const meta = this._cachedMeta;\n    meta.dataset.updateControlPoints(this.chart.chartArea, meta.iScale.axis);\n    super.draw();\n  }\n}\n","import DatasetController from '../core/core.datasetController';\nimport {toRadians, PI, formatNumber, _parseObjectDataRadialScale} from '../helpers/index';\n\nexport default class PolarAreaController extends DatasetController {\n\n  static id = 'polarArea';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    dataElementType: 'arc',\n    animation: {\n      animateRotate: true,\n      animateScale: true\n    },\n    animations: {\n      numbers: {\n        type: 'number',\n        properties: ['x', 'y', 'startAngle', 'endAngle', 'innerRadius', 'outerRadius']\n      },\n    },\n    indexAxis: 'r',\n    startAngle: 0,\n  };\n\n  /**\n   * @type {any}\n   */\n  static overrides = {\n    aspectRatio: 1,\n\n    plugins: {\n      legend: {\n        labels: {\n          generateLabels(chart) {\n            const data = chart.data;\n            if (data.labels.length && data.datasets.length) {\n              const {labels: {pointStyle, color}} = chart.legend.options;\n\n              return data.labels.map((label, i) => {\n                const meta = chart.getDatasetMeta(0);\n                const style = meta.controller.getStyle(i);\n\n                return {\n                  text: label,\n                  fillStyle: style.backgroundColor,\n                  strokeStyle: style.borderColor,\n                  fontColor: color,\n                  lineWidth: style.borderWidth,\n                  pointStyle: pointStyle,\n                  hidden: !chart.getDataVisibility(i),\n\n                  // Extra data used for toggling the correct item\n                  index: i\n                };\n              });\n            }\n            return [];\n          }\n        },\n\n        onClick(e, legendItem, legend) {\n          legend.chart.toggleDataVisibility(legendItem.index);\n          legend.chart.update();\n        }\n      }\n    },\n\n    scales: {\n      r: {\n        type: 'radialLinear',\n        angleLines: {\n          display: false\n        },\n        beginAtZero: true,\n        grid: {\n          circular: true\n        },\n        pointLabels: {\n          display: false\n        },\n        startAngle: 0\n      }\n    }\n  };\n\n  constructor(chart, datasetIndex) {\n    super(chart, datasetIndex);\n\n    this.innerRadius = undefined;\n    this.outerRadius = undefined;\n  }\n\n  getLabelAndValue(index) {\n    const meta = this._cachedMeta;\n    const chart = this.chart;\n    const labels = chart.data.labels || [];\n    const value = formatNumber(meta._parsed[index].r, chart.options.locale);\n\n    return {\n      label: labels[index] || '',\n      value,\n    };\n  }\n\n  parseObjectData(meta, data, start, count) {\n    return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);\n  }\n\n  update(mode) {\n    const arcs = this._cachedMeta.data;\n\n    this._updateRadius();\n    this.updateElements(arcs, 0, arcs.length, mode);\n  }\n\n  /**\n   * @protected\n   */\n  getMinMax() {\n    const meta = this._cachedMeta;\n    const range = {min: Number.POSITIVE_INFINITY, max: Number.NEGATIVE_INFINITY};\n\n    meta.data.forEach((element, index) => {\n      const parsed = this.getParsed(index).r;\n\n      if (!isNaN(parsed) && this.chart.getDataVisibility(index)) {\n        if (parsed < range.min) {\n          range.min = parsed;\n        }\n\n        if (parsed > range.max) {\n          range.max = parsed;\n        }\n      }\n    });\n\n    return range;\n  }\n\n  /**\n\t * @private\n\t */\n  _updateRadius() {\n    const chart = this.chart;\n    const chartArea = chart.chartArea;\n    const opts = chart.options;\n    const minSize = Math.min(chartArea.right - chartArea.left, chartArea.bottom - chartArea.top);\n\n    const outerRadius = Math.max(minSize / 2, 0);\n    const innerRadius = Math.max(opts.cutoutPercentage ? (outerRadius / 100) * (opts.cutoutPercentage) : 1, 0);\n    const radiusLength = (outerRadius - innerRadius) / chart.getVisibleDatasetCount();\n\n    this.outerRadius = outerRadius - (radiusLength * this.index);\n    this.innerRadius = this.outerRadius - radiusLength;\n  }\n\n  updateElements(arcs, start, count, mode) {\n    const reset = mode === 'reset';\n    const chart = this.chart;\n    const opts = chart.options;\n    const animationOpts = opts.animation;\n    const scale = this._cachedMeta.rScale;\n    const centerX = scale.xCenter;\n    const centerY = scale.yCenter;\n    const datasetStartAngle = scale.getIndexAngle(0) - 0.5 * PI;\n    let angle = datasetStartAngle;\n    let i;\n\n    const defaultAngle = 360 / this.countVisibleElements();\n\n    for (i = 0; i < start; ++i) {\n      angle += this._computeAngle(i, mode, defaultAngle);\n    }\n    for (i = start; i < start + count; i++) {\n      const arc = arcs[i];\n      let startAngle = angle;\n      let endAngle = angle + this._computeAngle(i, mode, defaultAngle);\n      let outerRadius = chart.getDataVisibility(i) ? scale.getDistanceFromCenterForValue(this.getParsed(i).r) : 0;\n      angle = endAngle;\n\n      if (reset) {\n        if (animationOpts.animateScale) {\n          outerRadius = 0;\n        }\n        if (animationOpts.animateRotate) {\n          startAngle = endAngle = datasetStartAngle;\n        }\n      }\n\n      const properties = {\n        x: centerX,\n        y: centerY,\n        innerRadius: 0,\n        outerRadius,\n        startAngle,\n        endAngle,\n        options: this.resolveDataElementOptions(i, arc.active ? 'active' : mode)\n      };\n\n      this.updateElement(arc, i, properties, mode);\n    }\n  }\n\n  countVisibleElements() {\n    const meta = this._cachedMeta;\n    let count = 0;\n\n    meta.data.forEach((element, index) => {\n      if (!isNaN(this.getParsed(index).r) && this.chart.getDataVisibility(index)) {\n        count++;\n      }\n    });\n\n    return count;\n  }\n\n  /**\n\t * @private\n\t */\n  _computeAngle(index, mode, defaultAngle) {\n    return this.chart.getDataVisibility(index)\n      ? toRadians(this.resolveDataElementOptions(index, mode).angle || defaultAngle)\n      : 0;\n  }\n}\n","import DoughnutController from './controller.doughnut';\n\n// Pie charts are Doughnut chart with different defaults\nexport default class PieController extends DoughnutController {\n\n  static id = 'pie';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    // The percentage of the chart that we cut out of the middle.\n    cutout: 0,\n\n    // The rotation of the chart, where the first data arc begins.\n    rotation: 0,\n\n    // The total circumference of the chart.\n    circumference: 360,\n\n    // The outr radius of the chart\n    radius: '100%'\n  };\n}\n","import DatasetController from '../core/core.datasetController';\nimport {_parseObjectDataRadialScale} from '../helpers/index';\n\nexport default class RadarController extends DatasetController {\n\n  static id = 'radar';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    datasetElementType: 'line',\n    dataElementType: 'point',\n    indexAxis: 'r',\n    showLine: true,\n    elements: {\n      line: {\n        fill: 'start'\n      }\n    },\n  };\n\n  /**\n   * @type {any}\n   */\n  static overrides = {\n    aspectRatio: 1,\n\n    scales: {\n      r: {\n        type: 'radialLinear',\n      }\n    }\n  };\n\n  /**\n\t * @protected\n\t */\n  getLabelAndValue(index) {\n    const vScale = this._cachedMeta.vScale;\n    const parsed = this.getParsed(index);\n\n    return {\n      label: vScale.getLabels()[index],\n      value: '' + vScale.getLabelForValue(parsed[vScale.axis])\n    };\n  }\n\n  parseObjectData(meta, data, start, count) {\n    return _parseObjectDataRadialScale.bind(this)(meta, data, start, count);\n  }\n\n  update(mode) {\n    const meta = this._cachedMeta;\n    const line = meta.dataset;\n    const points = meta.data || [];\n    const labels = meta.iScale.getLabels();\n\n    // Update Line\n    line.points = points;\n    // In resize mode only point locations change, so no need to set the points or options.\n    if (mode !== 'resize') {\n      const options = this.resolveDatasetElementOptions(mode);\n      if (!this.options.showLine) {\n        options.borderWidth = 0;\n      }\n\n      const properties = {\n        _loop: true,\n        _fullLoop: labels.length === points.length,\n        options\n      };\n\n      this.updateElement(line, undefined, properties, mode);\n    }\n\n    // Update Points\n    this.updateElements(points, 0, points.length, mode);\n  }\n\n  updateElements(points, start, count, mode) {\n    const scale = this._cachedMeta.rScale;\n    const reset = mode === 'reset';\n\n    for (let i = start; i < start + count; i++) {\n      const point = points[i];\n      const options = this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n      const pointPosition = scale.getPointPositionForValue(i, this.getParsed(i).r);\n\n      const x = reset ? scale.xCenter : pointPosition.x;\n      const y = reset ? scale.yCenter : pointPosition.y;\n\n      const properties = {\n        x,\n        y,\n        angle: pointPosition.angle,\n        skip: isNaN(x) || isNaN(y),\n        options\n      };\n\n      this.updateElement(point, i, properties, mode);\n    }\n  }\n}\n","import DatasetController from '../core/core.datasetController';\nimport {isNullOrUndef} from '../helpers';\nimport {isNumber} from '../helpers/helpers.math';\nimport {_getStartAndCountOfVisiblePoints, _scaleRangesChanged} from '../helpers/helpers.extras';\n\nexport default class ScatterController extends DatasetController {\n\n  static id = 'scatter';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    datasetElementType: false,\n    dataElementType: 'point',\n    showLine: false,\n    fill: false\n  };\n\n  /**\n   * @type {any}\n   */\n  static overrides = {\n\n    interaction: {\n      mode: 'point'\n    },\n\n    scales: {\n      x: {\n        type: 'linear'\n      },\n      y: {\n        type: 'linear'\n      }\n    }\n  };\n\n  /**\n\t * @protected\n\t */\n  getLabelAndValue(index) {\n    const meta = this._cachedMeta;\n    const labels = this.chart.data.labels || [];\n    const {xScale, yScale} = meta;\n    const parsed = this.getParsed(index);\n    const x = xScale.getLabelForValue(parsed.x);\n    const y = yScale.getLabelForValue(parsed.y);\n\n    return {\n      label: labels[index] || '',\n      value: '(' + x + ', ' + y + ')'\n    };\n  }\n\n  update(mode) {\n    const meta = this._cachedMeta;\n    const {data: points = []} = meta;\n    // @ts-ignore\n    const animationsDisabled = this.chart._animationsDisabled;\n    let {start, count} = _getStartAndCountOfVisiblePoints(meta, points, animationsDisabled);\n\n    this._drawStart = start;\n    this._drawCount = count;\n\n    if (_scaleRangesChanged(meta)) {\n      start = 0;\n      count = points.length;\n    }\n\n    if (this.options.showLine) {\n\n      const {dataset: line, _dataset} = meta;\n\n      // Update Line\n      line._chart = this.chart;\n      line._datasetIndex = this.index;\n      line._decimated = !!_dataset._decimated;\n      line.points = points;\n\n      const options = this.resolveDatasetElementOptions(mode);\n      options.segment = this.options.segment;\n      this.updateElement(line, undefined, {\n        animated: !animationsDisabled,\n        options\n      }, mode);\n    }\n\n    // Update Points\n    this.updateElements(points, start, count, mode);\n  }\n\n  addElements() {\n    const {showLine} = this.options;\n\n    if (!this.datasetElementType && showLine) {\n      this.datasetElementType = this.chart.registry.getElement('line');\n    }\n\n    super.addElements();\n  }\n\n  updateElements(points, start, count, mode) {\n    const reset = mode === 'reset';\n    const {iScale, vScale, _stacked, _dataset} = this._cachedMeta;\n    const firstOpts = this.resolveDataElementOptions(start, mode);\n    const sharedOptions = this.getSharedOptions(firstOpts);\n    const includeOptions = this.includeOptions(mode, sharedOptions);\n    const iAxis = iScale.axis;\n    const vAxis = vScale.axis;\n    const {spanGaps, segment} = this.options;\n    const maxGapLength = isNumber(spanGaps) ? spanGaps : Number.POSITIVE_INFINITY;\n    const directUpdate = this.chart._animationsDisabled || reset || mode === 'none';\n    let prevParsed = start > 0 && this.getParsed(start - 1);\n\n    for (let i = start; i < start + count; ++i) {\n      const point = points[i];\n      const parsed = this.getParsed(i);\n      const properties = directUpdate ? point : {};\n      const nullData = isNullOrUndef(parsed[vAxis]);\n      const iPixel = properties[iAxis] = iScale.getPixelForValue(parsed[iAxis], i);\n      const vPixel = properties[vAxis] = reset || nullData ? vScale.getBasePixel() : vScale.getPixelForValue(_stacked ? this.applyStack(vScale, parsed, _stacked) : parsed[vAxis], i);\n\n      properties.skip = isNaN(iPixel) || isNaN(vPixel) || nullData;\n      properties.stop = i > 0 && (Math.abs(parsed[iAxis] - prevParsed[iAxis])) > maxGapLength;\n      if (segment) {\n        properties.parsed = parsed;\n        properties.raw = _dataset.data[i];\n      }\n\n      if (includeOptions) {\n        properties.options = sharedOptions || this.resolveDataElementOptions(i, point.active ? 'active' : mode);\n      }\n\n      if (!directUpdate) {\n        this.updateElement(point, i, properties, mode);\n      }\n\n      prevParsed = parsed;\n    }\n\n    this.updateSharedOptions(sharedOptions, mode, firstOpts);\n  }\n\n  /**\n\t * @protected\n\t */\n  getMaxOverflow() {\n    const meta = this._cachedMeta;\n    const data = meta.data || [];\n\n    if (!this.options.showLine) {\n      let max = 0;\n      for (let i = data.length - 1; i >= 0; --i) {\n        max = Math.max(max, data[i].size(this.resolveDataElementOptions(i)) / 2);\n      }\n      return max > 0 && max;\n    }\n\n    const dataset = meta.dataset;\n    const border = dataset.options && dataset.options.borderWidth || 0;\n\n    if (!data.length) {\n      return border;\n    }\n\n    const firstPoint = data[0].size(this.resolveDataElementOptions(0));\n    const lastPoint = data[data.length - 1].size(this.resolveDataElementOptions(data.length - 1));\n    return Math.max(border, firstPoint, lastPoint) / 2;\n  }\n}\n","import Element from '../core/core.element';\nimport {_angleBetween, getAngleFromPoint, TAU, HALF_PI, valueOrDefault} from '../helpers/index';\nimport {PI, _isBetween, _limitValue} from '../helpers/helpers.math';\nimport {_readValueToProps} from '../helpers/helpers.options';\nimport type {ArcOptions, Point} from '../../types';\n\n\nfunction clipArc(ctx: CanvasRenderingContext2D, element: ArcElement, endAngle: number) {\n  const {startAngle, pixelMargin, x, y, outerRadius, innerRadius} = element;\n  let angleMargin = pixelMargin / outerRadius;\n\n  // Draw an inner border by clipping the arc and drawing a double-width border\n  // Enlarge the clipping arc by 0.33 pixels to eliminate glitches between borders\n  ctx.beginPath();\n  ctx.arc(x, y, outerRadius, startAngle - angleMargin, endAngle + angleMargin);\n  if (innerRadius > pixelMargin) {\n    angleMargin = pixelMargin / innerRadius;\n    ctx.arc(x, y, innerRadius, endAngle + angleMargin, startAngle - angleMargin, true);\n  } else {\n    ctx.arc(x, y, pixelMargin, endAngle + HALF_PI, startAngle - HALF_PI);\n  }\n  ctx.closePath();\n  ctx.clip();\n}\n\nfunction toRadiusCorners(value) {\n  return _readValueToProps(value, ['outerStart', 'outerEnd', 'innerStart', 'innerEnd']);\n}\n\n/**\n * Parse border radius from the provided options\n */\nfunction parseBorderRadius(arc: ArcElement, innerRadius: number, outerRadius: number, angleDelta: number) {\n  const o = toRadiusCorners(arc.options.borderRadius);\n  const halfThickness = (outerRadius - innerRadius) / 2;\n  const innerLimit = Math.min(halfThickness, angleDelta * innerRadius / 2);\n\n  // Outer limits are complicated. We want to compute the available angular distance at\n  // a radius of outerRadius - borderRadius because for small angular distances, this term limits.\n  // We compute at r = outerRadius - borderRadius because this circle defines the center of the border corners.\n  //\n  // If the borderRadius is large, that value can become negative.\n  // This causes the outer borders to lose their radius entirely, which is rather unexpected. To solve that, if borderRadius > outerRadius\n  // we know that the thickness term will dominate and compute the limits at that point\n  const computeOuterLimit = (val) => {\n    const outerArcLimit = (outerRadius - Math.min(halfThickness, val)) * angleDelta / 2;\n    return _limitValue(val, 0, Math.min(halfThickness, outerArcLimit));\n  };\n\n  return {\n    outerStart: computeOuterLimit(o.outerStart),\n    outerEnd: computeOuterLimit(o.outerEnd),\n    innerStart: _limitValue(o.innerStart, 0, innerLimit),\n    innerEnd: _limitValue(o.innerEnd, 0, innerLimit),\n  };\n}\n\n/**\n * Convert (r, 𝜃) to (x, y)\n */\nfunction rThetaToXY(r: number, theta: number, x: number, y: number) {\n  return {\n    x: x + r * Math.cos(theta),\n    y: y + r * Math.sin(theta),\n  };\n}\n\n\n/**\n * Path the arc, respecting border radius by separating into left and right halves.\n *\n *   Start      End\n *\n *    1--->a--->2    Outer\n *   /           \\\n *   8           3\n *   |           |\n *   |           |\n *   7           4\n *   \\           /\n *    6<---b<---5    Inner\n */\nfunction pathArc(\n  ctx: CanvasRenderingContext2D,\n  element: ArcElement,\n  offset: number,\n  spacing: number,\n  end: number,\n  circular: boolean,\n) {\n  const {x, y, startAngle: start, pixelMargin, innerRadius: innerR} = element;\n\n  const outerRadius = Math.max(element.outerRadius + spacing + offset - pixelMargin, 0);\n  const innerRadius = innerR > 0 ? innerR + spacing + offset + pixelMargin : 0;\n\n  let spacingOffset = 0;\n  const alpha = end - start;\n\n  if (spacing) {\n    // When spacing is present, it is the same for all items\n    // So we adjust the start and end angle of the arc such that\n    // the distance is the same as it would be without the spacing\n    const noSpacingInnerRadius = innerR > 0 ? innerR - spacing : 0;\n    const noSpacingOuterRadius = outerRadius > 0 ? outerRadius - spacing : 0;\n    const avNogSpacingRadius = (noSpacingInnerRadius + noSpacingOuterRadius) / 2;\n    const adjustedAngle = avNogSpacingRadius !== 0 ? (alpha * avNogSpacingRadius) / (avNogSpacingRadius + spacing) : alpha;\n    spacingOffset = (alpha - adjustedAngle) / 2;\n  }\n\n  const beta = Math.max(0.001, alpha * outerRadius - offset / PI) / outerRadius;\n  const angleOffset = (alpha - beta) / 2;\n  const startAngle = start + angleOffset + spacingOffset;\n  const endAngle = end - angleOffset - spacingOffset;\n  const {outerStart, outerEnd, innerStart, innerEnd} = parseBorderRadius(element, innerRadius, outerRadius, endAngle - startAngle);\n\n  const outerStartAdjustedRadius = outerRadius - outerStart;\n  const outerEndAdjustedRadius = outerRadius - outerEnd;\n  const outerStartAdjustedAngle = startAngle + outerStart / outerStartAdjustedRadius;\n  const outerEndAdjustedAngle = endAngle - outerEnd / outerEndAdjustedRadius;\n\n  const innerStartAdjustedRadius = innerRadius + innerStart;\n  const innerEndAdjustedRadius = innerRadius + innerEnd;\n  const innerStartAdjustedAngle = startAngle + innerStart / innerStartAdjustedRadius;\n  const innerEndAdjustedAngle = endAngle - innerEnd / innerEndAdjustedRadius;\n\n  ctx.beginPath();\n\n  if (circular) {\n    // The first arc segments from point 1 to point a to point 2\n    const outerMidAdjustedAngle = (outerStartAdjustedAngle + outerEndAdjustedAngle) / 2;\n    ctx.arc(x, y, outerRadius, outerStartAdjustedAngle, outerMidAdjustedAngle);\n    ctx.arc(x, y, outerRadius, outerMidAdjustedAngle, outerEndAdjustedAngle);\n\n    // The corner segment from point 2 to point 3\n    if (outerEnd > 0) {\n      const pCenter = rThetaToXY(outerEndAdjustedRadius, outerEndAdjustedAngle, x, y);\n      ctx.arc(pCenter.x, pCenter.y, outerEnd, outerEndAdjustedAngle, endAngle + HALF_PI);\n    }\n\n    // The line from point 3 to point 4\n    const p4 = rThetaToXY(innerEndAdjustedRadius, endAngle, x, y);\n    ctx.lineTo(p4.x, p4.y);\n\n    // The corner segment from point 4 to point 5\n    if (innerEnd > 0) {\n      const pCenter = rThetaToXY(innerEndAdjustedRadius, innerEndAdjustedAngle, x, y);\n      ctx.arc(pCenter.x, pCenter.y, innerEnd, endAngle + HALF_PI, innerEndAdjustedAngle + Math.PI);\n    }\n\n    // The inner arc from point 5 to point b to point 6\n    const innerMidAdjustedAngle = ((endAngle - (innerEnd / innerRadius)) + (startAngle + (innerStart / innerRadius))) / 2;\n    ctx.arc(x, y, innerRadius, endAngle - (innerEnd / innerRadius), innerMidAdjustedAngle, true);\n    ctx.arc(x, y, innerRadius, innerMidAdjustedAngle, startAngle + (innerStart / innerRadius), true);\n\n    // The corner segment from point 6 to point 7\n    if (innerStart > 0) {\n      const pCenter = rThetaToXY(innerStartAdjustedRadius, innerStartAdjustedAngle, x, y);\n      ctx.arc(pCenter.x, pCenter.y, innerStart, innerStartAdjustedAngle + Math.PI, startAngle - HALF_PI);\n    }\n\n    // The line from point 7 to point 8\n    const p8 = rThetaToXY(outerStartAdjustedRadius, startAngle, x, y);\n    ctx.lineTo(p8.x, p8.y);\n\n    // The corner segment from point 8 to point 1\n    if (outerStart > 0) {\n      const pCenter = rThetaToXY(outerStartAdjustedRadius, outerStartAdjustedAngle, x, y);\n      ctx.arc(pCenter.x, pCenter.y, outerStart, startAngle - HALF_PI, outerStartAdjustedAngle);\n    }\n  } else {\n    ctx.moveTo(x, y);\n\n    const outerStartX = Math.cos(outerStartAdjustedAngle) * outerRadius + x;\n    const outerStartY = Math.sin(outerStartAdjustedAngle) * outerRadius + y;\n    ctx.lineTo(outerStartX, outerStartY);\n\n    const outerEndX = Math.cos(outerEndAdjustedAngle) * outerRadius + x;\n    const outerEndY = Math.sin(outerEndAdjustedAngle) * outerRadius + y;\n    ctx.lineTo(outerEndX, outerEndY);\n  }\n\n  ctx.closePath();\n}\n\nfunction drawArc(\n  ctx: CanvasRenderingContext2D,\n  element: ArcElement,\n  offset: number,\n  spacing: number,\n  circular: boolean,\n) {\n  const {fullCircles, startAngle, circumference} = element;\n  let endAngle = element.endAngle;\n  if (fullCircles) {\n    pathArc(ctx, element, offset, spacing, endAngle, circular);\n    for (let i = 0; i < fullCircles; ++i) {\n      ctx.fill();\n    }\n    if (!isNaN(circumference)) {\n      endAngle = startAngle + (circumference % TAU || TAU);\n    }\n  }\n  pathArc(ctx, element, offset, spacing, endAngle, circular);\n  ctx.fill();\n  return endAngle;\n}\n\nfunction drawBorder(\n  ctx: CanvasRenderingContext2D,\n  element: ArcElement,\n  offset: number,\n  spacing: number,\n  circular: boolean,\n) {\n  const {fullCircles, startAngle, circumference, options} = element;\n  const {borderWidth, borderJoinStyle} = options;\n  const inner = options.borderAlign === 'inner';\n\n  if (!borderWidth) {\n    return;\n  }\n\n  if (inner) {\n    ctx.lineWidth = borderWidth * 2;\n    ctx.lineJoin = borderJoinStyle || 'round';\n  } else {\n    ctx.lineWidth = borderWidth;\n    ctx.lineJoin = borderJoinStyle || 'bevel';\n  }\n\n  let endAngle = element.endAngle;\n  if (fullCircles) {\n    pathArc(ctx, element, offset, spacing, endAngle, circular);\n    for (let i = 0; i < fullCircles; ++i) {\n      ctx.stroke();\n    }\n    if (!isNaN(circumference)) {\n      endAngle = startAngle + (circumference % TAU || TAU);\n    }\n  }\n\n  if (inner) {\n    clipArc(ctx, element, endAngle);\n  }\n\n  if (!fullCircles) {\n    pathArc(ctx, element, offset, spacing, endAngle, circular);\n    ctx.stroke();\n  }\n}\n\nexport interface ArcProps extends Point {\n  startAngle: number;\n  endAngle: number;\n  innerRadius: number;\n  outerRadius: number;\n  circumference: number;\n}\n\nexport default class ArcElement extends Element<ArcProps, ArcOptions> {\n\n  static id = 'arc';\n\n  static defaults = {\n    borderAlign: 'center',\n    borderColor: '#fff',\n    borderJoinStyle: undefined,\n    borderRadius: 0,\n    borderWidth: 2,\n    offset: 0,\n    spacing: 0,\n    angle: undefined,\n    circular: true,\n  };\n\n  static defaultRoutes = {\n    backgroundColor: 'backgroundColor'\n  };\n\n  circumference: number;\n  endAngle: number;\n  fullCircles: number;\n  innerRadius: number;\n  outerRadius: number;\n  pixelMargin: number;\n  startAngle: number;\n\n  constructor(cfg) {\n    super();\n\n    this.options = undefined;\n    this.circumference = undefined;\n    this.startAngle = undefined;\n    this.endAngle = undefined;\n    this.innerRadius = undefined;\n    this.outerRadius = undefined;\n    this.pixelMargin = 0;\n    this.fullCircles = 0;\n\n    if (cfg) {\n      Object.assign(this, cfg);\n    }\n  }\n\n  inRange(chartX: number, chartY: number, useFinalPosition: boolean) {\n    const point = this.getProps(['x', 'y'], useFinalPosition);\n    const {angle, distance} = getAngleFromPoint(point, {x: chartX, y: chartY});\n    const {startAngle, endAngle, innerRadius, outerRadius, circumference} = this.getProps([\n      'startAngle',\n      'endAngle',\n      'innerRadius',\n      'outerRadius',\n      'circumference'\n    ], useFinalPosition);\n    const rAdjust = this.options.spacing / 2;\n    const _circumference = valueOrDefault(circumference, endAngle - startAngle);\n    const betweenAngles = _circumference >= TAU || _angleBetween(angle, startAngle, endAngle);\n    const withinRadius = _isBetween(distance, innerRadius + rAdjust, outerRadius + rAdjust);\n\n    return (betweenAngles && withinRadius);\n  }\n\n  getCenterPoint(useFinalPosition: boolean) {\n    const {x, y, startAngle, endAngle, innerRadius, outerRadius} = this.getProps([\n      'x',\n      'y',\n      'startAngle',\n      'endAngle',\n      'innerRadius',\n      'outerRadius',\n      'circumference',\n    ], useFinalPosition);\n    const {offset, spacing} = this.options;\n    const halfAngle = (startAngle + endAngle) / 2;\n    const halfRadius = (innerRadius + outerRadius + spacing + offset) / 2;\n    return {\n      x: x + Math.cos(halfAngle) * halfRadius,\n      y: y + Math.sin(halfAngle) * halfRadius\n    };\n  }\n\n  tooltipPosition(useFinalPosition: boolean) {\n    return this.getCenterPoint(useFinalPosition);\n  }\n\n  draw(ctx: CanvasRenderingContext2D) {\n    const {options, circumference} = this;\n    const offset = (options.offset || 0) / 4;\n    const spacing = (options.spacing || 0) / 2;\n    const circular = options.circular;\n    this.pixelMargin = (options.borderAlign === 'inner') ? 0.33 : 0;\n    this.fullCircles = circumference > TAU ? Math.floor(circumference / TAU) : 0;\n\n    if (circumference === 0 || this.innerRadius < 0 || this.outerRadius < 0) {\n      return;\n    }\n\n    ctx.save();\n\n    const halfAngle = (this.startAngle + this.endAngle) / 2;\n    ctx.translate(Math.cos(halfAngle) * offset, Math.sin(halfAngle) * offset);\n    const fix = 1 - Math.sin(Math.min(PI, circumference || 0));\n    const radiusOffset = offset * fix;\n\n    ctx.fillStyle = options.backgroundColor;\n    ctx.strokeStyle = options.borderColor;\n\n    drawArc(ctx, this, radiusOffset, spacing, circular);\n    drawBorder(ctx, this, radiusOffset, spacing, circular);\n\n    ctx.restore();\n  }\n}\n","import Element from '../core/core.element';\nimport {_bezierInterpolation, _pointInLine, _steppedInterpolation} from '../helpers/helpers.interpolation';\nimport {_computeSegments, _boundSegments} from '../helpers/helpers.segment';\nimport {_steppedLineTo, _bezierCurveTo} from '../helpers/helpers.canvas';\nimport {_updateBezierControlPoints} from '../helpers/helpers.curve';\nimport {valueOrDefault} from '../helpers';\n\n/**\n * @typedef { import(\"./element.point\").default } PointElement\n */\n\nfunction setStyle(ctx, options, style = options) {\n  ctx.lineCap = valueOrDefault(style.borderCapStyle, options.borderCapStyle);\n  ctx.setLineDash(valueOrDefault(style.borderDash, options.borderDash));\n  ctx.lineDashOffset = valueOrDefault(style.borderDashOffset, options.borderDashOffset);\n  ctx.lineJoin = valueOrDefault(style.borderJoinStyle, options.borderJoinStyle);\n  ctx.lineWidth = valueOrDefault(style.borderWidth, options.borderWidth);\n  ctx.strokeStyle = valueOrDefault(style.borderColor, options.borderColor);\n}\n\nfunction lineTo(ctx, previous, target) {\n  ctx.lineTo(target.x, target.y);\n}\n\nfunction getLineMethod(options) {\n  if (options.stepped) {\n    return _steppedLineTo;\n  }\n\n  if (options.tension || options.cubicInterpolationMode === 'monotone') {\n    return _bezierCurveTo;\n  }\n\n  return lineTo;\n}\n\nfunction pathVars(points, segment, params = {}) {\n  const count = points.length;\n  const {start: paramsStart = 0, end: paramsEnd = count - 1} = params;\n  const {start: segmentStart, end: segmentEnd} = segment;\n  const start = Math.max(paramsStart, segmentStart);\n  const end = Math.min(paramsEnd, segmentEnd);\n  const outside = paramsStart < segmentStart && paramsEnd < segmentStart || paramsStart > segmentEnd && paramsEnd > segmentEnd;\n\n  return {\n    count,\n    start,\n    loop: segment.loop,\n    ilen: end < start && !outside ? count + end - start : end - start\n  };\n}\n\n/**\n * Create path from points, grouping by truncated x-coordinate\n * Points need to be in order by x-coordinate for this to work efficiently\n * @param {CanvasRenderingContext2D|Path2D} ctx - Context\n * @param {LineElement} line\n * @param {object} segment\n * @param {number} segment.start - start index of the segment, referring the points array\n * @param {number} segment.end - end index of the segment, referring the points array\n * @param {boolean} segment.loop - indicates that the segment is a loop\n * @param {object} params\n * @param {boolean} params.move - move to starting point (vs line to it)\n * @param {boolean} params.reverse - path the segment from end to start\n * @param {number} params.start - limit segment to points starting from `start` index\n * @param {number} params.end - limit segment to points ending at `start` + `count` index\n */\nfunction pathSegment(ctx, line, segment, params) {\n  const {points, options} = line;\n  const {count, start, loop, ilen} = pathVars(points, segment, params);\n  const lineMethod = getLineMethod(options);\n  // eslint-disable-next-line prefer-const\n  let {move = true, reverse} = params || {};\n  let i, point, prev;\n\n  for (i = 0; i <= ilen; ++i) {\n    point = points[(start + (reverse ? ilen - i : i)) % count];\n\n    if (point.skip) {\n      // If there is a skipped point inside a segment, spanGaps must be true\n      continue;\n    } else if (move) {\n      ctx.moveTo(point.x, point.y);\n      move = false;\n    } else {\n      lineMethod(ctx, prev, point, reverse, options.stepped);\n    }\n\n    prev = point;\n  }\n\n  if (loop) {\n    point = points[(start + (reverse ? ilen : 0)) % count];\n    lineMethod(ctx, prev, point, reverse, options.stepped);\n  }\n\n  return !!loop;\n}\n\n/**\n * Create path from points, grouping by truncated x-coordinate\n * Points need to be in order by x-coordinate for this to work efficiently\n * @param {CanvasRenderingContext2D|Path2D} ctx - Context\n * @param {LineElement} line\n * @param {object} segment\n * @param {number} segment.start - start index of the segment, referring the points array\n * @param {number} segment.end - end index of the segment, referring the points array\n * @param {boolean} segment.loop - indicates that the segment is a loop\n * @param {object} params\n * @param {boolean} params.move - move to starting point (vs line to it)\n * @param {boolean} params.reverse - path the segment from end to start\n * @param {number} params.start - limit segment to points starting from `start` index\n * @param {number} params.end - limit segment to points ending at `start` + `count` index\n */\nfunction fastPathSegment(ctx, line, segment, params) {\n  const points = line.points;\n  const {count, start, ilen} = pathVars(points, segment, params);\n  const {move = true, reverse} = params || {};\n  let avgX = 0;\n  let countX = 0;\n  let i, point, prevX, minY, maxY, lastY;\n\n  const pointIndex = (index) => (start + (reverse ? ilen - index : index)) % count;\n  const drawX = () => {\n    if (minY !== maxY) {\n      // Draw line to maxY and minY, using the average x-coordinate\n      ctx.lineTo(avgX, maxY);\n      ctx.lineTo(avgX, minY);\n      // Line to y-value of last point in group. So the line continues\n      // from correct position. Not using move, to have solid path.\n      ctx.lineTo(avgX, lastY);\n    }\n  };\n\n  if (move) {\n    point = points[pointIndex(0)];\n    ctx.moveTo(point.x, point.y);\n  }\n\n  for (i = 0; i <= ilen; ++i) {\n    point = points[pointIndex(i)];\n\n    if (point.skip) {\n      // If there is a skipped point inside a segment, spanGaps must be true\n      continue;\n    }\n\n    const x = point.x;\n    const y = point.y;\n    const truncX = x | 0; // truncated x-coordinate\n\n    if (truncX === prevX) {\n      // Determine `minY` / `maxY` and `avgX` while we stay within same x-position\n      if (y < minY) {\n        minY = y;\n      } else if (y > maxY) {\n        maxY = y;\n      }\n      // For first point in group, countX is `0`, so average will be `x` / 1.\n      avgX = (countX * avgX + x) / ++countX;\n    } else {\n      drawX();\n      // Draw line to next x-position, using the first (or only)\n      // y-value in that group\n      ctx.lineTo(x, y);\n\n      prevX = truncX;\n      countX = 0;\n      minY = maxY = y;\n    }\n    // Keep track of the last y-value in group\n    lastY = y;\n  }\n  drawX();\n}\n\n/**\n * @param {LineElement} line - the line\n * @returns {function}\n * @private\n */\nfunction _getSegmentMethod(line) {\n  const opts = line.options;\n  const borderDash = opts.borderDash && opts.borderDash.length;\n  const useFastPath = !line._decimated && !line._loop && !opts.tension && opts.cubicInterpolationMode !== 'monotone' && !opts.stepped && !borderDash;\n  return useFastPath ? fastPathSegment : pathSegment;\n}\n\n/**\n * @private\n */\nfunction _getInterpolationMethod(options) {\n  if (options.stepped) {\n    return _steppedInterpolation;\n  }\n\n  if (options.tension || options.cubicInterpolationMode === 'monotone') {\n    return _bezierInterpolation;\n  }\n\n  return _pointInLine;\n}\n\nfunction strokePathWithCache(ctx, line, start, count) {\n  let path = line._path;\n  if (!path) {\n    path = line._path = new Path2D();\n    if (line.path(path, start, count)) {\n      path.closePath();\n    }\n  }\n  setStyle(ctx, line.options);\n  ctx.stroke(path);\n}\n\nfunction strokePathDirect(ctx, line, start, count) {\n  const {segments, options} = line;\n  const segmentMethod = _getSegmentMethod(line);\n\n  for (const segment of segments) {\n    setStyle(ctx, options, segment.style);\n    ctx.beginPath();\n    if (segmentMethod(ctx, line, segment, {start, end: start + count - 1})) {\n      ctx.closePath();\n    }\n    ctx.stroke();\n  }\n}\n\nconst usePath2D = typeof Path2D === 'function';\n\nfunction draw(ctx, line, start, count) {\n  if (usePath2D && !line.options.segment) {\n    strokePathWithCache(ctx, line, start, count);\n  } else {\n    strokePathDirect(ctx, line, start, count);\n  }\n}\n\nexport default class LineElement extends Element {\n\n  static id = 'line';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    borderCapStyle: 'butt',\n    borderDash: [],\n    borderDashOffset: 0,\n    borderJoinStyle: 'miter',\n    borderWidth: 3,\n    capBezierPoints: true,\n    cubicInterpolationMode: 'default',\n    fill: false,\n    spanGaps: false,\n    stepped: false,\n    tension: 0,\n  };\n\n  /**\n   * @type {any}\n   */\n  static defaultRoutes = {\n    backgroundColor: 'backgroundColor',\n    borderColor: 'borderColor'\n  };\n\n\n  static descriptors = {\n    _scriptable: true,\n    _indexable: (name) => name !== 'borderDash' && name !== 'fill',\n  };\n\n\n  constructor(cfg) {\n    super();\n\n    this.animated = true;\n    this.options = undefined;\n    this._chart = undefined;\n    this._loop = undefined;\n    this._fullLoop = undefined;\n    this._path = undefined;\n    this._points = undefined;\n    this._segments = undefined;\n    this._decimated = false;\n    this._pointsUpdated = false;\n    this._datasetIndex = undefined;\n\n    if (cfg) {\n      Object.assign(this, cfg);\n    }\n  }\n\n  updateControlPoints(chartArea, indexAxis) {\n    const options = this.options;\n    if ((options.tension || options.cubicInterpolationMode === 'monotone') && !options.stepped && !this._pointsUpdated) {\n      const loop = options.spanGaps ? this._loop : this._fullLoop;\n      _updateBezierControlPoints(this._points, options, chartArea, loop, indexAxis);\n      this._pointsUpdated = true;\n    }\n  }\n\n  set points(points) {\n    this._points = points;\n    delete this._segments;\n    delete this._path;\n    this._pointsUpdated = false;\n  }\n\n  get points() {\n    return this._points;\n  }\n\n  get segments() {\n    return this._segments || (this._segments = _computeSegments(this, this.options.segment));\n  }\n\n  /**\n\t * First non-skipped point on this line\n\t * @returns {PointElement|undefined}\n\t */\n  first() {\n    const segments = this.segments;\n    const points = this.points;\n    return segments.length && points[segments[0].start];\n  }\n\n  /**\n\t * Last non-skipped point on this line\n\t * @returns {PointElement|undefined}\n\t */\n  last() {\n    const segments = this.segments;\n    const points = this.points;\n    const count = segments.length;\n    return count && points[segments[count - 1].end];\n  }\n\n  /**\n\t * Interpolate a point in this line at the same value on `property` as\n\t * the reference `point` provided\n\t * @param {PointElement} point - the reference point\n\t * @param {string} property - the property to match on\n\t * @returns {PointElement|undefined}\n\t */\n  interpolate(point, property) {\n    const options = this.options;\n    const value = point[property];\n    const points = this.points;\n    const segments = _boundSegments(this, {property, start: value, end: value});\n\n    if (!segments.length) {\n      return;\n    }\n\n    const result = [];\n    const _interpolate = _getInterpolationMethod(options);\n    let i, ilen;\n    for (i = 0, ilen = segments.length; i < ilen; ++i) {\n      const {start, end} = segments[i];\n      const p1 = points[start];\n      const p2 = points[end];\n      if (p1 === p2) {\n        result.push(p1);\n        continue;\n      }\n      const t = Math.abs((value - p1[property]) / (p2[property] - p1[property]));\n      const interpolated = _interpolate(p1, p2, t, options.stepped);\n      interpolated[property] = point[property];\n      result.push(interpolated);\n    }\n    return result.length === 1 ? result[0] : result;\n  }\n\n  /**\n\t * Append a segment of this line to current path.\n\t * @param {CanvasRenderingContext2D} ctx\n\t * @param {object} segment\n\t * @param {number} segment.start - start index of the segment, referring the points array\n \t * @param {number} segment.end - end index of the segment, referring the points array\n \t * @param {boolean} segment.loop - indicates that the segment is a loop\n\t * @param {object} params\n\t * @param {boolean} params.move - move to starting point (vs line to it)\n\t * @param {boolean} params.reverse - path the segment from end to start\n\t * @param {number} params.start - limit segment to points starting from `start` index\n\t * @param {number} params.end - limit segment to points ending at `start` + `count` index\n\t * @returns {undefined|boolean} - true if the segment is a full loop (path should be closed)\n\t */\n  pathSegment(ctx, segment, params) {\n    const segmentMethod = _getSegmentMethod(this);\n    return segmentMethod(ctx, this, segment, params);\n  }\n\n  /**\n\t * Append all segments of this line to current path.\n\t * @param {CanvasRenderingContext2D|Path2D} ctx\n\t * @param {number} [start]\n\t * @param {number} [count]\n\t * @returns {undefined|boolean} - true if line is a full loop (path should be closed)\n\t */\n  path(ctx, start, count) {\n    const segments = this.segments;\n    const segmentMethod = _getSegmentMethod(this);\n    let loop = this._loop;\n\n    start = start || 0;\n    count = count || (this.points.length - start);\n\n    for (const segment of segments) {\n      loop &= segmentMethod(ctx, this, segment, {start, end: start + count - 1});\n    }\n    return !!loop;\n  }\n\n  /**\n\t * Draw\n\t * @param {CanvasRenderingContext2D} ctx\n\t * @param {object} chartArea\n\t * @param {number} [start]\n\t * @param {number} [count]\n\t */\n  draw(ctx, chartArea, start, count) {\n    const options = this.options || {};\n    const points = this.points || [];\n\n    if (points.length && options.borderWidth) {\n      ctx.save();\n\n      draw(ctx, this, start, count);\n\n      ctx.restore();\n    }\n\n    if (this.animated) {\n      // When line is animated, the control points and path are not cached.\n      this._pointsUpdated = false;\n      this._path = undefined;\n    }\n  }\n}\n","import Element from '../core/core.element';\nimport {drawPoint, _isPointInArea} from '../helpers/helpers.canvas';\nimport {\n  type CartesianParsedData,\n  type ChartArea,\n  type Point,\n  type PointHoverOptions,\n  type PointOptions,\n} from '../../types';\n\nfunction inRange(el: PointElement, pos: number, axis: 'x' | 'y', useFinalPosition?: boolean) {\n  const options = el.options;\n  const {[axis]: value} = el.getProps([axis], useFinalPosition);\n\n  return (Math.abs(pos - value) < options.radius + options.hitRadius);\n}\n\nexport type PointProps = Point\n\nexport default class PointElement extends Element<PointProps, PointOptions & PointHoverOptions> {\n\n  static id = 'point';\n\n  parsed: CartesianParsedData;\n  skip?: boolean;\n  stop?: boolean;\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    borderWidth: 1,\n    hitRadius: 1,\n    hoverBorderWidth: 1,\n    hoverRadius: 4,\n    pointStyle: 'circle',\n    radius: 3,\n    rotation: 0\n  };\n\n  /**\n   * @type {any}\n   */\n  static defaultRoutes = {\n    backgroundColor: 'backgroundColor',\n    borderColor: 'borderColor'\n  };\n\n  constructor(cfg) {\n    super();\n\n    this.options = undefined;\n    this.parsed = undefined;\n    this.skip = undefined;\n    this.stop = undefined;\n\n    if (cfg) {\n      Object.assign(this, cfg);\n    }\n  }\n\n  inRange(mouseX: number, mouseY: number, useFinalPosition?: boolean) {\n    const options = this.options;\n    const {x, y} = this.getProps(['x', 'y'], useFinalPosition);\n    return ((Math.pow(mouseX - x, 2) + Math.pow(mouseY - y, 2)) < Math.pow(options.hitRadius + options.radius, 2));\n  }\n\n  inXRange(mouseX: number, useFinalPosition?: boolean) {\n    return inRange(this, mouseX, 'x', useFinalPosition);\n  }\n\n  inYRange(mouseY: number, useFinalPosition?: boolean) {\n    return inRange(this, mouseY, 'y', useFinalPosition);\n  }\n\n  getCenterPoint(useFinalPosition?: boolean) {\n    const {x, y} = this.getProps(['x', 'y'], useFinalPosition);\n    return {x, y};\n  }\n\n  size(options?: Partial<PointOptions & PointHoverOptions>) {\n    options = options || this.options || {};\n    let radius = options.radius || 0;\n    radius = Math.max(radius, radius && options.hoverRadius || 0);\n    const borderWidth = radius && options.borderWidth || 0;\n    return (radius + borderWidth) * 2;\n  }\n\n  draw(ctx: CanvasRenderingContext2D, area: ChartArea) {\n    const options = this.options;\n\n    if (this.skip || options.radius < 0.1 || !_isPointInArea(this, area, this.size(options) / 2)) {\n      return;\n    }\n\n    ctx.strokeStyle = options.borderColor;\n    ctx.lineWidth = options.borderWidth;\n    ctx.fillStyle = options.backgroundColor;\n    drawPoint(ctx, options, this.x, this.y);\n  }\n\n  getRange() {\n    const options = this.options || {};\n    // @ts-expect-error Fallbacks should never be hit in practice\n    return options.radius + options.hitRadius;\n  }\n}\n","import Element from '../core/core.element';\nimport {isObject, _isBetween, _limitValue} from '../helpers';\nimport {addRoundedRectPath} from '../helpers/helpers.canvas';\nimport {toTRBL, toTRBLCorners} from '../helpers/helpers.options';\n\n/** @typedef {{ x: number, y: number, base: number, horizontal: boolean, width: number, height: number }} BarProps */\n\n/**\n * Helper function to get the bounds of the bar regardless of the orientation\n * @param {BarElement} bar the bar\n * @param {boolean} [useFinalPosition]\n * @return {object} bounds of the bar\n * @private\n */\nfunction getBarBounds(bar, useFinalPosition) {\n  const {x, y, base, width, height} = /** @type {BarProps} */ (bar.getProps(['x', 'y', 'base', 'width', 'height'], useFinalPosition));\n\n  let left, right, top, bottom, half;\n\n  if (bar.horizontal) {\n    half = height / 2;\n    left = Math.min(x, base);\n    right = Math.max(x, base);\n    top = y - half;\n    bottom = y + half;\n  } else {\n    half = width / 2;\n    left = x - half;\n    right = x + half;\n    top = Math.min(y, base);\n    bottom = Math.max(y, base);\n  }\n\n  return {left, top, right, bottom};\n}\n\nfunction skipOrLimit(skip, value, min, max) {\n  return skip ? 0 : _limitValue(value, min, max);\n}\n\nfunction parseBorderWidth(bar, maxW, maxH) {\n  const value = bar.options.borderWidth;\n  const skip = bar.borderSkipped;\n  const o = toTRBL(value);\n\n  return {\n    t: skipOrLimit(skip.top, o.top, 0, maxH),\n    r: skipOrLimit(skip.right, o.right, 0, maxW),\n    b: skipOrLimit(skip.bottom, o.bottom, 0, maxH),\n    l: skipOrLimit(skip.left, o.left, 0, maxW)\n  };\n}\n\nfunction parseBorderRadius(bar, maxW, maxH) {\n  const {enableBorderRadius} = bar.getProps(['enableBorderRadius']);\n  const value = bar.options.borderRadius;\n  const o = toTRBLCorners(value);\n  const maxR = Math.min(maxW, maxH);\n  const skip = bar.borderSkipped;\n\n  // If the value is an object, assume the user knows what they are doing\n  // and apply as directed.\n  const enableBorder = enableBorderRadius || isObject(value);\n\n  return {\n    topLeft: skipOrLimit(!enableBorder || skip.top || skip.left, o.topLeft, 0, maxR),\n    topRight: skipOrLimit(!enableBorder || skip.top || skip.right, o.topRight, 0, maxR),\n    bottomLeft: skipOrLimit(!enableBorder || skip.bottom || skip.left, o.bottomLeft, 0, maxR),\n    bottomRight: skipOrLimit(!enableBorder || skip.bottom || skip.right, o.bottomRight, 0, maxR)\n  };\n}\n\nfunction boundingRects(bar) {\n  const bounds = getBarBounds(bar);\n  const width = bounds.right - bounds.left;\n  const height = bounds.bottom - bounds.top;\n  const border = parseBorderWidth(bar, width / 2, height / 2);\n  const radius = parseBorderRadius(bar, width / 2, height / 2);\n\n  return {\n    outer: {\n      x: bounds.left,\n      y: bounds.top,\n      w: width,\n      h: height,\n      radius\n    },\n    inner: {\n      x: bounds.left + border.l,\n      y: bounds.top + border.t,\n      w: width - border.l - border.r,\n      h: height - border.t - border.b,\n      radius: {\n        topLeft: Math.max(0, radius.topLeft - Math.max(border.t, border.l)),\n        topRight: Math.max(0, radius.topRight - Math.max(border.t, border.r)),\n        bottomLeft: Math.max(0, radius.bottomLeft - Math.max(border.b, border.l)),\n        bottomRight: Math.max(0, radius.bottomRight - Math.max(border.b, border.r)),\n      }\n    }\n  };\n}\n\nfunction inRange(bar, x, y, useFinalPosition) {\n  const skipX = x === null;\n  const skipY = y === null;\n  const skipBoth = skipX && skipY;\n  const bounds = bar && !skipBoth && getBarBounds(bar, useFinalPosition);\n\n  return bounds\n\t\t&& (skipX || _isBetween(x, bounds.left, bounds.right))\n\t\t&& (skipY || _isBetween(y, bounds.top, bounds.bottom));\n}\n\nfunction hasRadius(radius) {\n  return radius.topLeft || radius.topRight || radius.bottomLeft || radius.bottomRight;\n}\n\n/**\n * Add a path of a rectangle to the current sub-path\n * @param {CanvasRenderingContext2D} ctx Context\n * @param {*} rect Bounding rect\n */\nfunction addNormalRectPath(ctx, rect) {\n  ctx.rect(rect.x, rect.y, rect.w, rect.h);\n}\n\nfunction inflateRect(rect, amount, refRect = {}) {\n  const x = rect.x !== refRect.x ? -amount : 0;\n  const y = rect.y !== refRect.y ? -amount : 0;\n  const w = (rect.x + rect.w !== refRect.x + refRect.w ? amount : 0) - x;\n  const h = (rect.y + rect.h !== refRect.y + refRect.h ? amount : 0) - y;\n  return {\n    x: rect.x + x,\n    y: rect.y + y,\n    w: rect.w + w,\n    h: rect.h + h,\n    radius: rect.radius\n  };\n}\n\nexport default class BarElement extends Element {\n\n  static id = 'bar';\n\n  /**\n   * @type {any}\n   */\n  static defaults = {\n    borderSkipped: 'start',\n    borderWidth: 0,\n    borderRadius: 0,\n    inflateAmount: 'auto',\n    pointStyle: undefined\n  };\n\n  /**\n   * @type {any}\n   */\n  static defaultRoutes = {\n    backgroundColor: 'backgroundColor',\n    borderColor: 'borderColor'\n  };\n\n  constructor(cfg) {\n    super();\n\n    this.options = undefined;\n    this.horizontal = undefined;\n    this.base = undefined;\n    this.width = undefined;\n    this.height = undefined;\n    this.inflateAmount = undefined;\n\n    if (cfg) {\n      Object.assign(this, cfg);\n    }\n  }\n\n  draw(ctx) {\n    const {inflateAmount, options: {borderColor, backgroundColor}} = this;\n    const {inner, outer} = boundingRects(this);\n    const addRectPath = hasRadius(outer.radius) ? addRoundedRectPath : addNormalRectPath;\n\n    ctx.save();\n\n    if (outer.w !== inner.w || outer.h !== inner.h) {\n      ctx.beginPath();\n      addRectPath(ctx, inflateRect(outer, inflateAmount, inner));\n      ctx.clip();\n      addRectPath(ctx, inflateRect(inner, -inflateAmount, outer));\n      ctx.fillStyle = borderColor;\n      ctx.fill('evenodd');\n    }\n\n    ctx.beginPath();\n    addRectPath(ctx, inflateRect(inner, inflateAmount));\n    ctx.fillStyle = backgroundColor;\n    ctx.fill();\n\n    ctx.restore();\n  }\n\n  inRange(mouseX, mouseY, useFinalPosition) {\n    return inRange(this, mouseX, mouseY, useFinalPosition);\n  }\n\n  inXRange(mouseX, useFinalPosition) {\n    return inRange(this, mouseX, null, useFinalPosition);\n  }\n\n  inYRange(mouseY, useFinalPosition) {\n    return inRange(this, null, mouseY, useFinalPosition);\n  }\n\n  getCenterPoint(useFinalPosition) {\n    const {x, y, base, horizontal} = /** @type {BarProps} */ (this.getProps(['x', 'y', 'base', 'horizontal'], useFinalPosition));\n    return {\n      x: horizontal ? (x + base) / 2 : x,\n      y: horizontal ? y : (y + base) / 2\n    };\n  }\n\n  getRange(axis) {\n    return axis === 'x' ? this.width / 2 : this.height / 2;\n  }\n}\n","import type {Chart, ChartConfiguration, ChartDataset} from '../types';\n\nexport interface ColorsPluginOptions {\n  enabled?: boolean;\n}\n\ntype DatasetColorizer = (dataset: ChartDataset, i: number) => void;\n\ninterface ColorsDescriptor {\n  backgroundColor?: unknown;\n  borderColor?: unknown;\n}\n\nconst BORDER_COLORS = [\n  'rgb(54, 162, 235)', // blue\n  'rgb(255, 99, 132)', // red\n  'rgb(255, 159, 64)', // orange\n  'rgb(255, 205, 86)', // yellow\n  'rgb(75, 192, 192)', // green\n  'rgb(153, 102, 255)', // purple\n  'rgb(201, 203, 207)' // grey\n];\n\n// Border colors with 50% transparency\nconst BACKGROUND_COLORS = /* #__PURE__ */ BORDER_COLORS.map(color => color.replace('rgb(', 'rgba(').replace(')', ', 0.5)'));\n\nfunction getBorderColor(i: number) {\n  return BORDER_COLORS[i % BORDER_COLORS.length];\n}\n\nfunction getBackgroundColor(i: number) {\n  return BACKGROUND_COLORS[i % BACKGROUND_COLORS.length];\n}\n\nfunction createDefaultDatasetColorizer() {\n  return (dataset: ChartDataset, i: number) => {\n    dataset.borderColor = getBorderColor(i);\n    dataset.backgroundColor = getBackgroundColor(i);\n  };\n}\n\nfunction createDoughnutDatasetColorizer() {\n  let i = 0;\n\n  return (dataset: ChartDataset) => {\n    dataset.backgroundColor = dataset.data.map(() => getBorderColor(i++));\n  };\n}\n\nfunction createPolarAreaDatasetColorizer() {\n  let i = 0;\n\n  return (dataset: ChartDataset) => {\n    dataset.backgroundColor = dataset.data.map(() => getBackgroundColor(i++));\n  };\n}\n\nfunction getColorizer(type: string) {\n  if (type === 'doughnut' || type === 'pie') {\n    return createDoughnutDatasetColorizer();\n  } else if (type === 'polarArea') {\n    return createPolarAreaDatasetColorizer();\n  }\n  return createDefaultDatasetColorizer();\n}\n\nfunction containsColorsDefinitions(\n  descriptors: ColorsDescriptor[] | Record<string, ColorsDescriptor>\n) {\n  let k: number | string;\n\n  for (k in descriptors) {\n    if (descriptors[k].borderColor || descriptors[k].backgroundColor) {\n      return true;\n    }\n  }\n\n  return false;\n}\n\nexport default {\n  id: 'colors',\n\n  defaults: {\n    enabled: true,\n  },\n\n  beforeLayout(chart: Chart, _args, options: ColorsPluginOptions) {\n    if (!options.enabled) {\n      return;\n    }\n\n    const {\n      type,\n      options: {elements},\n      data: {datasets}\n    } = chart.config as ChartConfiguration;\n\n    if (containsColorsDefinitions(datasets) || elements && containsColorsDefinitions(elements)) {\n      return;\n    }\n\n    const colorizer: DatasetColorizer = getColorizer(type);\n    datasets.forEach(colorizer);\n  }\n};\n","import {_limitValue, _lookupByKey, isNullOrUndef, resolve} from '../helpers';\n\nfunction lttbDecimation(data, start, count, availableWidth, options) {\n  /**\n   * Implementation of the Largest Triangle Three Buckets algorithm.\n   *\n   * This implementation is based on the original implementation by Sveinn Steinarsson\n   * in https://github.com/sveinn-steinarsson/flot-downsample/blob/master/jquery.flot.downsample.js\n   *\n   * The original implementation is MIT licensed.\n   */\n  const samples = options.samples || availableWidth;\n  // There are less points than the threshold, returning the whole array\n  if (samples >= count) {\n    return data.slice(start, start + count);\n  }\n\n  const decimated = [];\n\n  const bucketWidth = (count - 2) / (samples - 2);\n  let sampledIndex = 0;\n  const endIndex = start + count - 1;\n  // Starting from offset\n  let a = start;\n  let i, maxAreaPoint, maxArea, area, nextA;\n\n  decimated[sampledIndex++] = data[a];\n\n  for (i = 0; i < samples - 2; i++) {\n    let avgX = 0;\n    let avgY = 0;\n    let j;\n\n    // Adding offset\n    const avgRangeStart = Math.floor((i + 1) * bucketWidth) + 1 + start;\n    const avgRangeEnd = Math.min(Math.floor((i + 2) * bucketWidth) + 1, count) + start;\n    const avgRangeLength = avgRangeEnd - avgRangeStart;\n\n    for (j = avgRangeStart; j < avgRangeEnd; j++) {\n      avgX += data[j].x;\n      avgY += data[j].y;\n    }\n\n    avgX /= avgRangeLength;\n    avgY /= avgRangeLength;\n\n    // Adding offset\n    const rangeOffs = Math.floor(i * bucketWidth) + 1 + start;\n    const rangeTo = Math.min(Math.floor((i + 1) * bucketWidth) + 1, count) + start;\n    const {x: pointAx, y: pointAy} = data[a];\n\n    // Note that this is changed from the original algorithm which initializes these\n    // values to 1. The reason for this change is that if the area is small, nextA\n    // would never be set and thus a crash would occur in the next loop as `a` would become\n    // `undefined`. Since the area is always positive, but could be 0 in the case of a flat trace,\n    // initializing with a negative number is the correct solution.\n    maxArea = area = -1;\n\n    for (j = rangeOffs; j < rangeTo; j++) {\n      area = 0.5 * Math.abs(\n        (pointAx - avgX) * (data[j].y - pointAy) -\n        (pointAx - data[j].x) * (avgY - pointAy)\n      );\n\n      if (area > maxArea) {\n        maxArea = area;\n        maxAreaPoint = data[j];\n        nextA = j;\n      }\n    }\n\n    decimated[sampledIndex++] = maxAreaPoint;\n    a = nextA;\n  }\n\n  // Include the last point\n  decimated[sampledIndex++] = data[endIndex];\n\n  return decimated;\n}\n\nfunction minMaxDecimation(data, start, count, availableWidth) {\n  let avgX = 0;\n  let countX = 0;\n  let i, point, x, y, prevX, minIndex, maxIndex, startIndex, minY, maxY;\n  const decimated = [];\n  const endIndex = start + count - 1;\n\n  const xMin = data[start].x;\n  const xMax = data[endIndex].x;\n  const dx = xMax - xMin;\n\n  for (i = start; i < start + count; ++i) {\n    point = data[i];\n    x = (point.x - xMin) / dx * availableWidth;\n    y = point.y;\n    const truncX = x | 0;\n\n    if (truncX === prevX) {\n      // Determine `minY` / `maxY` and `avgX` while we stay within same x-position\n      if (y < minY) {\n        minY = y;\n        minIndex = i;\n      } else if (y > maxY) {\n        maxY = y;\n        maxIndex = i;\n      }\n      // For first point in group, countX is `0`, so average will be `x` / 1.\n      // Use point.x here because we're computing the average data `x` value\n      avgX = (countX * avgX + point.x) / ++countX;\n    } else {\n      // Push up to 4 points, 3 for the last interval and the first point for this interval\n      const lastIndex = i - 1;\n\n      if (!isNullOrUndef(minIndex) && !isNullOrUndef(maxIndex)) {\n        // The interval is defined by 4 points: start, min, max, end.\n        // The starting point is already considered at this point, so we need to determine which\n        // of the other points to add. We need to sort these points to ensure the decimated data\n        // is still sorted and then ensure there are no duplicates.\n        const intermediateIndex1 = Math.min(minIndex, maxIndex);\n        const intermediateIndex2 = Math.max(minIndex, maxIndex);\n\n        if (intermediateIndex1 !== startIndex && intermediateIndex1 !== lastIndex) {\n          decimated.push({\n            ...data[intermediateIndex1],\n            x: avgX,\n          });\n        }\n        if (intermediateIndex2 !== startIndex && intermediateIndex2 !== lastIndex) {\n          decimated.push({\n            ...data[intermediateIndex2],\n            x: avgX\n          });\n        }\n      }\n\n      // lastIndex === startIndex will occur when a range has only 1 point which could\n      // happen with very uneven data\n      if (i > 0 && lastIndex !== startIndex) {\n        // Last point in the previous interval\n        decimated.push(data[lastIndex]);\n      }\n\n      // Start of the new interval\n      decimated.push(point);\n      prevX = truncX;\n      countX = 0;\n      minY = maxY = y;\n      minIndex = maxIndex = startIndex = i;\n    }\n  }\n\n  return decimated;\n}\n\nfunction cleanDecimatedDataset(dataset) {\n  if (dataset._decimated) {\n    const data = dataset._data;\n    delete dataset._decimated;\n    delete dataset._data;\n    Object.defineProperty(dataset, 'data', {value: data});\n  }\n}\n\nfunction cleanDecimatedData(chart) {\n  chart.data.datasets.forEach((dataset) => {\n    cleanDecimatedDataset(dataset);\n  });\n}\n\nfunction getStartAndCountOfVisiblePointsSimplified(meta, points) {\n  const pointCount = points.length;\n\n  let start = 0;\n  let count;\n\n  const {iScale} = meta;\n  const {min, max, minDefined, maxDefined} = iScale.getUserBounds();\n\n  if (minDefined) {\n    start = _limitValue(_lookupByKey(points, iScale.axis, min).lo, 0, pointCount - 1);\n  }\n  if (maxDefined) {\n    count = _limitValue(_lookupByKey(points, iScale.axis, max).hi + 1, start, pointCount) - start;\n  } else {\n    count = pointCount - start;\n  }\n\n  return {start, count};\n}\n\nexport default {\n  id: 'decimation',\n\n  defaults: {\n    algorithm: 'min-max',\n    enabled: false,\n  },\n\n  beforeElementsUpdate: (chart, args, options) => {\n    if (!options.enabled) {\n      // The decimation plugin may have been previously enabled. Need to remove old `dataset._data` handlers\n      cleanDecimatedData(chart);\n      return;\n    }\n\n    // Assume the entire chart is available to show a few more points than needed\n    const availableWidth = chart.width;\n\n    chart.data.datasets.forEach((dataset, datasetIndex) => {\n      const {_data, indexAxis} = dataset;\n      const meta = chart.getDatasetMeta(datasetIndex);\n      const data = _data || dataset.data;\n\n      if (resolve([indexAxis, chart.options.indexAxis]) === 'y') {\n        // Decimation is only supported for lines that have an X indexAxis\n        return;\n      }\n\n      if (!meta.controller.supportsDecimation) {\n        // Only line datasets are supported\n        return;\n      }\n\n      const xAxis = chart.scales[meta.xAxisID];\n      if (xAxis.type !== 'linear' && xAxis.type !== 'time') {\n        // Only linear interpolation is supported\n        return;\n      }\n\n      if (chart.options.parsing) {\n        // Plugin only supports data that does not need parsing\n        return;\n      }\n\n      let {start, count} = getStartAndCountOfVisiblePointsSimplified(meta, data);\n      const threshold = options.threshold || 4 * availableWidth;\n      if (count <= threshold) {\n        // No decimation is required until we are above this threshold\n        cleanDecimatedDataset(dataset);\n        return;\n      }\n\n      if (isNullOrUndef(_data)) {\n        // First time we are seeing this dataset\n        // We override the 'data' property with a setter that stores the\n        // raw data in _data, but reads the decimated data from _decimated\n        dataset._data = data;\n        delete dataset.data;\n        Object.defineProperty(dataset, 'data', {\n          configurable: true,\n          enumerable: true,\n          get: function() {\n            return this._decimated;\n          },\n          set: function(d) {\n            this._data = d;\n          }\n        });\n      }\n\n      // Point the chart to the decimated data\n      let decimated;\n      switch (options.algorithm) {\n      case 'lttb':\n        decimated = lttbDecimation(data, start, count, availableWidth, options);\n        break;\n      case 'min-max':\n        decimated = minMaxDecimation(data, start, count, availableWidth);\n        break;\n      default:\n        throw new Error(`Unsupported decimation algorithm '${options.algorithm}'`);\n      }\n\n      dataset._decimated = decimated;\n    });\n  },\n\n  destroy(chart) {\n    cleanDecimatedData(chart);\n  }\n};\n","import {_boundSegment, _boundSegments, _normalizeAngle} from '../../helpers';\n\nexport function _segments(line, target, property) {\n  const segments = line.segments;\n  const points = line.points;\n  const tpoints = target.points;\n  const parts = [];\n\n  for (const segment of segments) {\n    let {start, end} = segment;\n    end = _findSegmentEnd(start, end, points);\n\n    const bounds = _getBounds(property, points[start], points[end], segment.loop);\n\n    if (!target.segments) {\n      // Special case for boundary not supporting `segments` (simpleArc)\n      // Bounds are provided as `target` for partial circle, or undefined for full circle\n      parts.push({\n        source: segment,\n        target: bounds,\n        start: points[start],\n        end: points[end]\n      });\n      continue;\n    }\n\n    // Get all segments from `target` that intersect the bounds of current segment of `line`\n    const targetSegments = _boundSegments(target, bounds);\n\n    for (const tgt of targetSegments) {\n      const subBounds = _getBounds(property, tpoints[tgt.start], tpoints[tgt.end], tgt.loop);\n      const fillSources = _boundSegment(segment, points, subBounds);\n\n      for (const fillSource of fillSources) {\n        parts.push({\n          source: fillSource,\n          target: tgt,\n          start: {\n            [property]: _getEdge(bounds, subBounds, 'start', Math.max)\n          },\n          end: {\n            [property]: _getEdge(bounds, subBounds, 'end', Math.min)\n          }\n        });\n      }\n    }\n  }\n  return parts;\n}\n\nexport function _getBounds(property, first, last, loop) {\n  if (loop) {\n    return;\n  }\n  let start = first[property];\n  let end = last[property];\n\n  if (property === 'angle') {\n    start = _normalizeAngle(start);\n    end = _normalizeAngle(end);\n  }\n  return {property, start, end};\n}\n\nexport function _pointsFromSegments(boundary, line) {\n  const {x = null, y = null} = boundary || {};\n  const linePoints = line.points;\n  const points = [];\n  line.segments.forEach(({start, end}) => {\n    end = _findSegmentEnd(start, end, linePoints);\n    const first = linePoints[start];\n    const last = linePoints[end];\n    if (y !== null) {\n      points.push({x: first.x, y});\n      points.push({x: last.x, y});\n    } else if (x !== null) {\n      points.push({x, y: first.y});\n      points.push({x, y: last.y});\n    }\n  });\n  return points;\n}\n\nexport function _findSegmentEnd(start, end, points) {\n  for (;end > start; end--) {\n    const point = points[end];\n    if (!isNaN(point.x) && !isNaN(point.y)) {\n      break;\n    }\n  }\n  return end;\n}\n\nfunction _getEdge(a, b, prop, fn) {\n  if (a && b) {\n    return fn(a[prop], b[prop]);\n  }\n  return a ? a[prop] : b ? b[prop] : 0;\n}\n","/**\n * @typedef { import('../../core/core.controller').default } Chart\n * @typedef { import('../../core/core.scale').default } Scale\n * @typedef { import('../../elements/element.point').default } PointElement\n */\n\nimport {LineElement} from '../../elements';\nimport {isArray} from '../../helpers';\nimport {_pointsFromSegments} from './filler.segment';\n\n/**\n * @param {PointElement[] | { x: number; y: number; }} boundary\n * @param {LineElement} line\n * @return {LineElement?}\n */\nexport function _createBoundaryLine(boundary, line) {\n  let points = [];\n  let _loop = false;\n\n  if (isArray(boundary)) {\n    _loop = true;\n    // @ts-ignore\n    points = boundary;\n  } else {\n    points = _pointsFromSegments(boundary, line);\n  }\n\n  return points.length ? new LineElement({\n    points,\n    options: {tension: 0},\n    _loop,\n    _fullLoop: _loop\n  }) : null;\n}\n\nexport function _shouldApplyFill(source) {\n  return source && source.fill !== false;\n}\n","import {isObject, isFinite, valueOrDefault} from '../../helpers/helpers.core';\n\n/**\n * @typedef { import('../../core/core.scale').default } Scale\n * @typedef { import('../../elements/element.line').default } LineElement\n * @typedef { import('../../../types').FillTarget } FillTarget\n * @typedef { import('../../../types').ComplexFillTarget } ComplexFillTarget\n */\n\nexport function _resolveTarget(sources, index, propagate) {\n  const source = sources[index];\n  let fill = source.fill;\n  const visited = [index];\n  let target;\n\n  if (!propagate) {\n    return fill;\n  }\n\n  while (fill !== false && visited.indexOf(fill) === -1) {\n    if (!isFinite(fill)) {\n      return fill;\n    }\n\n    target = sources[fill];\n    if (!target) {\n      return false;\n    }\n\n    if (target.visible) {\n      return fill;\n    }\n\n    visited.push(fill);\n    fill = target.fill;\n  }\n\n  return false;\n}\n\n/**\n * @param {LineElement} line\n * @param {number} index\n * @param {number} count\n */\nexport function _decodeFill(line, index, count) {\n  /** @type {string | {value: number}} */\n  const fill = parseFillOption(line);\n\n  if (isObject(fill)) {\n    return isNaN(fill.value) ? false : fill;\n  }\n\n  let target = parseFloat(fill);\n\n  if (isFinite(target) && Math.floor(target) === target) {\n    return decodeTargetIndex(fill[0], index, target, count);\n  }\n\n  return ['origin', 'start', 'end', 'stack', 'shape'].indexOf(fill) >= 0 && fill;\n}\n\nfunction decodeTargetIndex(firstCh, index, target, count) {\n  if (firstCh === '-' || firstCh === '+') {\n    target = index + target;\n  }\n\n  if (target === index || target < 0 || target >= count) {\n    return false;\n  }\n\n  return target;\n}\n\n/**\n * @param {FillTarget | ComplexFillTarget} fill\n * @param {Scale} scale\n * @returns {number | null}\n */\nexport function _getTargetPixel(fill, scale) {\n  let pixel = null;\n  if (fill === 'start') {\n    pixel = scale.bottom;\n  } else if (fill === 'end') {\n    pixel = scale.top;\n  } else if (isObject(fill)) {\n    // @ts-ignore\n    pixel = scale.getPixelForValue(fill.value);\n  } else if (scale.getBasePixel) {\n    pixel = scale.getBasePixel();\n  }\n  return pixel;\n}\n\n/**\n * @param {FillTarget | ComplexFillTarget} fill\n * @param {Scale} scale\n * @param {number} startValue\n * @returns {number | undefined}\n */\nexport function _getTargetValue(fill, scale, startValue) {\n  let value;\n\n  if (fill === 'start') {\n    value = startValue;\n  } else if (fill === 'end') {\n    value = scale.options.reverse ? scale.min : scale.max;\n  } else if (isObject(fill)) {\n    // @ts-ignore\n    value = fill.value;\n  } else {\n    value = scale.getBaseValue();\n  }\n  return value;\n}\n\n/**\n * @param {LineElement} line\n */\nfunction parseFillOption(line) {\n  const options = line.options;\n  const fillOption = options.fill;\n  let fill = valueOrDefault(fillOption && fillOption.target, fillOption);\n\n  if (fill === undefined) {\n    fill = !!options.backgroundColor;\n  }\n\n  if (fill === false || fill === null) {\n    return false;\n  }\n\n  if (fill === true) {\n    return 'origin';\n  }\n  return fill;\n}\n","/**\n * @typedef { import('../../core/core.controller').default } Chart\n * @typedef { import('../../core/core.scale').default } Scale\n * @typedef { import('../../elements/element.point').default } PointElement\n */\n\nimport {LineElement} from '../../elements';\nimport {_isBetween} from '../../helpers';\nimport {_createBoundaryLine} from './filler.helper';\n\n/**\n * @param {{ chart: Chart; scale: Scale; index: number; line: LineElement; }} source\n * @return {LineElement}\n */\nexport function _buildStackLine(source) {\n  const {scale, index, line} = source;\n  const points = [];\n  const segments = line.segments;\n  const sourcePoints = line.points;\n  const linesBelow = getLinesBelow(scale, index);\n  linesBelow.push(_createBoundaryLine({x: null, y: scale.bottom}, line));\n\n  for (let i = 0; i < segments.length; i++) {\n    const segment = segments[i];\n    for (let j = segment.start; j <= segment.end; j++) {\n      addPointsBelow(points, sourcePoints[j], linesBelow);\n    }\n  }\n  return new LineElement({points, options: {}});\n}\n\n/**\n * @param {Scale} scale\n * @param {number} index\n * @return {LineElement[]}\n */\nfunction getLinesBelow(scale, index) {\n  const below = [];\n  const metas = scale.getMatchingVisibleMetas('line');\n\n  for (let i = 0; i < metas.length; i++) {\n    const meta = metas[i];\n    if (meta.index === index) {\n      break;\n    }\n    if (!meta.hidden) {\n      below.unshift(meta.dataset);\n    }\n  }\n  return below;\n}\n\n/**\n * @param {PointElement[]} points\n * @param {PointElement} sourcePoint\n * @param {LineElement[]} linesBelow\n */\nfunction addPointsBelow(points, sourcePoint, linesBelow) {\n  const postponed = [];\n  for (let j = 0; j < linesBelow.length; j++) {\n    const line = linesBelow[j];\n    const {first, last, point} = findPoint(line, sourcePoint, 'x');\n\n    if (!point || (first && last)) {\n      continue;\n    }\n    if (first) {\n      // First point of an segment -> need to add another point before this,\n      // from next line below.\n      postponed.unshift(point);\n    } else {\n      points.push(point);\n      if (!last) {\n        // In the middle of an segment, no need to add more points.\n        break;\n      }\n    }\n  }\n  points.push(...postponed);\n}\n\n/**\n * @param {LineElement} line\n * @param {PointElement} sourcePoint\n * @param {string} property\n * @returns {{point?: PointElement, first?: boolean, last?: boolean}}\n */\nfunction findPoint(line, sourcePoint, property) {\n  const point = line.interpolate(sourcePoint, property);\n  if (!point) {\n    return {};\n  }\n\n  const pointValue = point[property];\n  const segments = line.segments;\n  const linePoints = line.points;\n  let first = false;\n  let last = false;\n  for (let i = 0; i < segments.length; i++) {\n    const segment = segments[i];\n    const firstValue = linePoints[segment.start][property];\n    const lastValue = linePoints[segment.end][property];\n    if (_isBetween(pointValue, firstValue, lastValue)) {\n      first = pointValue === firstValue;\n      last = pointValue === lastValue;\n      break;\n    }\n  }\n  return {first, last, point};\n}\n","import {TAU} from '../../helpers';\n\n// TODO: use elements.ArcElement instead\nexport class simpleArc {\n  constructor(opts) {\n    this.x = opts.x;\n    this.y = opts.y;\n    this.radius = opts.radius;\n  }\n\n  pathSegment(ctx, bounds, opts) {\n    const {x, y, radius} = this;\n    bounds = bounds || {start: 0, end: TAU};\n    ctx.arc(x, y, radius, bounds.end, bounds.start, true);\n    return !opts.bounds;\n  }\n\n  interpolate(point) {\n    const {x, y, radius} = this;\n    const angle = point.angle;\n    return {\n      x: x + Math.cos(angle) * radius,\n      y: y + Math.sin(angle) * radius,\n      angle\n    };\n  }\n}\n","import {isFinite} from '../../helpers';\nimport {_createBoundaryLine} from './filler.helper';\nimport {_getTargetPixel, _getTargetValue} from './filler.options';\nimport {_buildStackLine} from './filler.target.stack';\nimport {simpleArc} from './simpleArc';\n\n/**\n * @typedef { import('../../core/core.controller').default } Chart\n * @typedef { import('../../core/core.scale').default } Scale\n * @typedef { import('../../elements/element.point').default } PointElement\n */\n\nexport function _getTarget(source) {\n  const {chart, fill, line} = source;\n\n  if (isFinite(fill)) {\n    return getLineByIndex(chart, fill);\n  }\n\n  if (fill === 'stack') {\n    return _buildStackLine(source);\n  }\n\n  if (fill === 'shape') {\n    return true;\n  }\n\n  const boundary = computeBoundary(source);\n\n  if (boundary instanceof simpleArc) {\n    return boundary;\n  }\n\n  return _createBoundaryLine(boundary, line);\n}\n\n/**\n * @param {Chart} chart\n * @param {number} index\n */\nfunction getLineByIndex(chart, index) {\n  const meta = chart.getDatasetMeta(index);\n  const visible = meta && chart.isDatasetVisible(index);\n  return visible ? meta.dataset : null;\n}\n\nfunction computeBoundary(source) {\n  const scale = source.scale || {};\n\n  if (scale.getPointPositionForValue) {\n    return computeCircularBoundary(source);\n  }\n  return computeLinearBoundary(source);\n}\n\n\nfunction computeLinearBoundary(source) {\n  const {scale = {}, fill} = source;\n  const pixel = _getTargetPixel(fill, scale);\n\n  if (isFinite(pixel)) {\n    const horizontal = scale.isHorizontal();\n\n    return {\n      x: horizontal ? pixel : null,\n      y: horizontal ? null : pixel\n    };\n  }\n\n  return null;\n}\n\nfunction computeCircularBoundary(source) {\n  const {scale, fill} = source;\n  const options = scale.options;\n  const length = scale.getLabels().length;\n  const start = options.reverse ? scale.max : scale.min;\n  const value = _getTargetValue(fill, scale, start);\n  const target = [];\n\n  if (options.grid.circular) {\n    const center = scale.getPointPositionForValue(0, start);\n    return new simpleArc({\n      x: center.x,\n      y: center.y,\n      radius: scale.getDistanceFromCenterForValue(value)\n    });\n  }\n\n  for (let i = 0; i < length; ++i) {\n    target.push(scale.getPointPositionForValue(i, value));\n  }\n  return target;\n}\n\n","import {clipArea, unclipArea} from '../../helpers';\nimport {_findSegmentEnd, _getBounds, _segments} from './filler.segment';\nimport {_getTarget} from './filler.target';\n\nexport function _drawfill(ctx, source, area) {\n  const target = _getTarget(source);\n  const {line, scale, axis} = source;\n  const lineOpts = line.options;\n  const fillOption = lineOpts.fill;\n  const color = lineOpts.backgroundColor;\n  const {above = color, below = color} = fillOption || {};\n  if (target && line.points.length) {\n    clipArea(ctx, area);\n    doFill(ctx, {line, target, above, below, area, scale, axis});\n    unclipArea(ctx);\n  }\n}\n\nfunction doFill(ctx, cfg) {\n  const {line, target, above, below, area, scale} = cfg;\n  const property = line._loop ? 'angle' : cfg.axis;\n\n  ctx.save();\n\n  if (property === 'x' && below !== above) {\n    clipVertical(ctx, target, area.top);\n    fill(ctx, {line, target, color: above, scale, property});\n    ctx.restore();\n    ctx.save();\n    clipVertical(ctx, target, area.bottom);\n  }\n  fill(ctx, {line, target, color: below, scale, property});\n\n  ctx.restore();\n}\n\nfunction clipVertical(ctx, target, clipY) {\n  const {segments, points} = target;\n  let first = true;\n  let lineLoop = false;\n\n  ctx.beginPath();\n  for (const segment of segments) {\n    const {start, end} = segment;\n    const firstPoint = points[start];\n    const lastPoint = points[_findSegmentEnd(start, end, points)];\n    if (first) {\n      ctx.moveTo(firstPoint.x, firstPoint.y);\n      first = false;\n    } else {\n      ctx.lineTo(firstPoint.x, clipY);\n      ctx.lineTo(firstPoint.x, firstPoint.y);\n    }\n    lineLoop = !!target.pathSegment(ctx, segment, {move: lineLoop});\n    if (lineLoop) {\n      ctx.closePath();\n    } else {\n      ctx.lineTo(lastPoint.x, clipY);\n    }\n  }\n\n  ctx.lineTo(target.first().x, clipY);\n  ctx.closePath();\n  ctx.clip();\n}\n\nfunction fill(ctx, cfg) {\n  const {line, target, property, color, scale} = cfg;\n  const segments = _segments(line, target, property);\n\n  for (const {source: src, target: tgt, start, end} of segments) {\n    const {style: {backgroundColor = color} = {}} = src;\n    const notShape = target !== true;\n\n    ctx.save();\n    ctx.fillStyle = backgroundColor;\n\n    clipBounds(ctx, scale, notShape && _getBounds(property, start, end));\n\n    ctx.beginPath();\n\n    const lineLoop = !!line.pathSegment(ctx, src);\n\n    let loop;\n    if (notShape) {\n      if (lineLoop) {\n        ctx.closePath();\n      } else {\n        interpolatedLineTo(ctx, target, end, property);\n      }\n\n      const targetLoop = !!target.pathSegment(ctx, tgt, {move: lineLoop, reverse: true});\n      loop = lineLoop && targetLoop;\n      if (!loop) {\n        interpolatedLineTo(ctx, target, start, property);\n      }\n    }\n\n    ctx.closePath();\n    ctx.fill(loop ? 'evenodd' : 'nonzero');\n\n    ctx.restore();\n  }\n}\n\nfunction clipBounds(ctx, scale, bounds) {\n  const {top, bottom} = scale.chart.chartArea;\n  const {property, start, end} = bounds || {};\n  if (property === 'x') {\n    ctx.beginPath();\n    ctx.rect(start, top, end - start, bottom - top);\n    ctx.clip();\n  }\n}\n\nfunction interpolatedLineTo(ctx, target, point, property) {\n  const interpolatedPoint = target.interpolate(point, property);\n  if (interpolatedPoint) {\n    ctx.lineTo(interpolatedPoint.x, interpolatedPoint.y);\n  }\n}\n\n","/**\n * Plugin based on discussion from the following Chart.js issues:\n * @see https://github.com/chartjs/Chart.js/issues/2380#issuecomment-279961569\n * @see https://github.com/chartjs/Chart.js/issues/2440#issuecomment-256461897\n */\n\nimport LineElement from '../../elements/element.line';\nimport {_drawfill} from './filler.drawing';\nimport {_shouldApplyFill} from './filler.helper';\nimport {_decodeFill, _resolveTarget} from './filler.options';\n\nexport default {\n  id: 'filler',\n\n  afterDatasetsUpdate(chart, _args, options) {\n    const count = (chart.data.datasets || []).length;\n    const sources = [];\n    let meta, i, line, source;\n\n    for (i = 0; i < count; ++i) {\n      meta = chart.getDatasetMeta(i);\n      line = meta.dataset;\n      source = null;\n\n      if (line && line.options && line instanceof LineElement) {\n        source = {\n          visible: chart.isDatasetVisible(i),\n          index: i,\n          fill: _decodeFill(line, i, count),\n          chart,\n          axis: meta.controller.options.indexAxis,\n          scale: meta.vScale,\n          line,\n        };\n      }\n\n      meta.$filler = source;\n      sources.push(source);\n    }\n\n    for (i = 0; i < count; ++i) {\n      source = sources[i];\n      if (!source || source.fill === false) {\n        continue;\n      }\n\n      source.fill = _resolveTarget(sources, i, options.propagate);\n    }\n  },\n\n  beforeDraw(chart, _args, options) {\n    const draw = options.drawTime === 'beforeDraw';\n    const metasets = chart.getSortedVisibleDatasetMetas();\n    const area = chart.chartArea;\n    for (let i = metasets.length - 1; i >= 0; --i) {\n      const source = metasets[i].$filler;\n      if (!source) {\n        continue;\n      }\n\n      source.line.updateControlPoints(area, source.axis);\n      if (draw && source.fill) {\n        _drawfill(chart.ctx, source, area);\n      }\n    }\n  },\n\n  beforeDatasetsDraw(chart, _args, options) {\n    if (options.drawTime !== 'beforeDatasetsDraw') {\n      return;\n    }\n\n    const metasets = chart.getSortedVisibleDatasetMetas();\n    for (let i = metasets.length - 1; i >= 0; --i) {\n      const source = metasets[i].$filler;\n\n      if (_shouldApplyFill(source)) {\n        _drawfill(chart.ctx, source, chart.chartArea);\n      }\n    }\n  },\n\n  beforeDatasetDraw(chart, args, options) {\n    const source = args.meta.$filler;\n\n    if (!_shouldApplyFill(source) || options.drawTime !== 'beforeDatasetDraw') {\n      return;\n    }\n\n    _drawfill(chart.ctx, source, chart.chartArea);\n  },\n\n  defaults: {\n    propagate: true,\n    drawTime: 'beforeDatasetDraw'\n  }\n};\n","import defaults from '../core/core.defaults';\nimport Element from '../core/core.element';\nimport layouts from '../core/core.layouts';\nimport {addRoundedRectPath, drawPointLegend, renderText} from '../helpers/helpers.canvas';\nimport {\n  _isBetween,\n  callback as call,\n  clipArea,\n  getRtlAdapter,\n  overrideTextDirection,\n  restoreTextDirection,\n  toFont,\n  toPadding,\n  unclipArea,\n  valueOrDefault,\n} from '../helpers/index';\nimport {_alignStartEnd, _textX, _toLeftRightCenter} from '../helpers/helpers.extras';\nimport {toTRBLCorners} from '../helpers/helpers.options';\n\n/**\n * @typedef { import(\"../../types\").ChartEvent } ChartEvent\n */\n\nconst getBoxSize = (labelOpts, fontSize) => {\n  let {boxHeight = fontSize, boxWidth = fontSize} = labelOpts;\n\n  if (labelOpts.usePointStyle) {\n    boxHeight = Math.min(boxHeight, fontSize);\n    boxWidth = labelOpts.pointStyleWidth || Math.min(boxWidth, fontSize);\n  }\n\n  return {\n    boxWidth,\n    boxHeight,\n    itemHeight: Math.max(fontSize, boxHeight)\n  };\n};\n\nconst itemsEqual = (a, b) => a !== null && b !== null && a.datasetIndex === b.datasetIndex && a.index === b.index;\n\nexport class Legend extends Element {\n\n  /**\n\t * @param {{ ctx: any; options: any; chart: any; }} config\n\t */\n  constructor(config) {\n    super();\n\n    this._added = false;\n\n    // Contains hit boxes for each dataset (in dataset order)\n    this.legendHitBoxes = [];\n\n    /**\n \t\t * @private\n \t\t */\n    this._hoveredItem = null;\n\n    // Are we in doughnut mode which has a different data type\n    this.doughnutMode = false;\n\n    this.chart = config.chart;\n    this.options = config.options;\n    this.ctx = config.ctx;\n    this.legendItems = undefined;\n    this.columnSizes = undefined;\n    this.lineWidths = undefined;\n    this.maxHeight = undefined;\n    this.maxWidth = undefined;\n    this.top = undefined;\n    this.bottom = undefined;\n    this.left = undefined;\n    this.right = undefined;\n    this.height = undefined;\n    this.width = undefined;\n    this._margins = undefined;\n    this.position = undefined;\n    this.weight = undefined;\n    this.fullSize = undefined;\n  }\n\n  update(maxWidth, maxHeight, margins) {\n    this.maxWidth = maxWidth;\n    this.maxHeight = maxHeight;\n    this._margins = margins;\n\n    this.setDimensions();\n    this.buildLabels();\n    this.fit();\n  }\n\n  setDimensions() {\n    if (this.isHorizontal()) {\n      this.width = this.maxWidth;\n      this.left = this._margins.left;\n      this.right = this.width;\n    } else {\n      this.height = this.maxHeight;\n      this.top = this._margins.top;\n      this.bottom = this.height;\n    }\n  }\n\n  buildLabels() {\n    const labelOpts = this.options.labels || {};\n    let legendItems = call(labelOpts.generateLabels, [this.chart], this) || [];\n\n    if (labelOpts.filter) {\n      legendItems = legendItems.filter((item) => labelOpts.filter(item, this.chart.data));\n    }\n\n    if (labelOpts.sort) {\n      legendItems = legendItems.sort((a, b) => labelOpts.sort(a, b, this.chart.data));\n    }\n\n    if (this.options.reverse) {\n      legendItems.reverse();\n    }\n\n    this.legendItems = legendItems;\n  }\n\n  fit() {\n    const {options, ctx} = this;\n\n    // The legend may not be displayed for a variety of reasons including\n    // the fact that the defaults got set to `false`.\n    // When the legend is not displayed, there are no guarantees that the options\n    // are correctly formatted so we need to bail out as early as possible.\n    if (!options.display) {\n      this.width = this.height = 0;\n      return;\n    }\n\n    const labelOpts = options.labels;\n    const labelFont = toFont(labelOpts.font);\n    const fontSize = labelFont.size;\n    const titleHeight = this._computeTitleHeight();\n    const {boxWidth, itemHeight} = getBoxSize(labelOpts, fontSize);\n\n    let width, height;\n\n    ctx.font = labelFont.string;\n\n    if (this.isHorizontal()) {\n      width = this.maxWidth; // fill all the width\n      height = this._fitRows(titleHeight, fontSize, boxWidth, itemHeight) + 10;\n    } else {\n      height = this.maxHeight; // fill all the height\n      width = this._fitCols(titleHeight, labelFont, boxWidth, itemHeight) + 10;\n    }\n\n    this.width = Math.min(width, options.maxWidth || this.maxWidth);\n    this.height = Math.min(height, options.maxHeight || this.maxHeight);\n  }\n\n  /**\n\t * @private\n\t */\n  _fitRows(titleHeight, fontSize, boxWidth, itemHeight) {\n    const {ctx, maxWidth, options: {labels: {padding}}} = this;\n    const hitboxes = this.legendHitBoxes = [];\n    // Width of each line of legend boxes. Labels wrap onto multiple lines when there are too many to fit on one\n    const lineWidths = this.lineWidths = [0];\n    const lineHeight = itemHeight + padding;\n    let totalHeight = titleHeight;\n\n    ctx.textAlign = 'left';\n    ctx.textBaseline = 'middle';\n\n    let row = -1;\n    let top = -lineHeight;\n    this.legendItems.forEach((legendItem, i) => {\n      const itemWidth = boxWidth + (fontSize / 2) + ctx.measureText(legendItem.text).width;\n\n      if (i === 0 || lineWidths[lineWidths.length - 1] + itemWidth + 2 * padding > maxWidth) {\n        totalHeight += lineHeight;\n        lineWidths[lineWidths.length - (i > 0 ? 0 : 1)] = 0;\n        top += lineHeight;\n        row++;\n      }\n\n      hitboxes[i] = {left: 0, top, row, width: itemWidth, height: itemHeight};\n\n      lineWidths[lineWidths.length - 1] += itemWidth + padding;\n    });\n\n    return totalHeight;\n  }\n\n  _fitCols(titleHeight, labelFont, boxWidth, _itemHeight) {\n    const {ctx, maxHeight, options: {labels: {padding}}} = this;\n    const hitboxes = this.legendHitBoxes = [];\n    const columnSizes = this.columnSizes = [];\n    const heightLimit = maxHeight - titleHeight;\n\n    let totalWidth = padding;\n    let currentColWidth = 0;\n    let currentColHeight = 0;\n\n    let left = 0;\n    let col = 0;\n\n    this.legendItems.forEach((legendItem, i) => {\n      const {itemWidth, itemHeight} = calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight);\n\n      // If too tall, go to new column\n      if (i > 0 && currentColHeight + itemHeight + 2 * padding > heightLimit) {\n        totalWidth += currentColWidth + padding;\n        columnSizes.push({width: currentColWidth, height: currentColHeight}); // previous column size\n        left += currentColWidth + padding;\n        col++;\n        currentColWidth = currentColHeight = 0;\n      }\n\n      // Store the hitbox width and height here. Final position will be updated in `draw`\n      hitboxes[i] = {left, top: currentColHeight, col, width: itemWidth, height: itemHeight};\n\n      // Get max width\n      currentColWidth = Math.max(currentColWidth, itemWidth);\n      currentColHeight += itemHeight + padding;\n    });\n\n    totalWidth += currentColWidth;\n    columnSizes.push({width: currentColWidth, height: currentColHeight}); // previous column size\n\n    return totalWidth;\n  }\n\n  adjustHitBoxes() {\n    if (!this.options.display) {\n      return;\n    }\n    const titleHeight = this._computeTitleHeight();\n    const {legendHitBoxes: hitboxes, options: {align, labels: {padding}, rtl}} = this;\n    const rtlHelper = getRtlAdapter(rtl, this.left, this.width);\n    if (this.isHorizontal()) {\n      let row = 0;\n      let left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);\n      for (const hitbox of hitboxes) {\n        if (row !== hitbox.row) {\n          row = hitbox.row;\n          left = _alignStartEnd(align, this.left + padding, this.right - this.lineWidths[row]);\n        }\n        hitbox.top += this.top + titleHeight + padding;\n        hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(left), hitbox.width);\n        left += hitbox.width + padding;\n      }\n    } else {\n      let col = 0;\n      let top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);\n      for (const hitbox of hitboxes) {\n        if (hitbox.col !== col) {\n          col = hitbox.col;\n          top = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - this.columnSizes[col].height);\n        }\n        hitbox.top = top;\n        hitbox.left += this.left + padding;\n        hitbox.left = rtlHelper.leftForLtr(rtlHelper.x(hitbox.left), hitbox.width);\n        top += hitbox.height + padding;\n      }\n    }\n  }\n\n  isHorizontal() {\n    return this.options.position === 'top' || this.options.position === 'bottom';\n  }\n\n  draw() {\n    if (this.options.display) {\n      const ctx = this.ctx;\n      clipArea(ctx, this);\n\n      this._draw();\n\n      unclipArea(ctx);\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _draw() {\n    const {options: opts, columnSizes, lineWidths, ctx} = this;\n    const {align, labels: labelOpts} = opts;\n    const defaultColor = defaults.color;\n    const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);\n    const labelFont = toFont(labelOpts.font);\n    const {padding} = labelOpts;\n    const fontSize = labelFont.size;\n    const halfFontSize = fontSize / 2;\n    let cursor;\n\n    this.drawTitle();\n\n    // Canvas setup\n    ctx.textAlign = rtlHelper.textAlign('left');\n    ctx.textBaseline = 'middle';\n    ctx.lineWidth = 0.5;\n    ctx.font = labelFont.string;\n\n    const {boxWidth, boxHeight, itemHeight} = getBoxSize(labelOpts, fontSize);\n\n    // current position\n    const drawLegendBox = function(x, y, legendItem) {\n      if (isNaN(boxWidth) || boxWidth <= 0 || isNaN(boxHeight) || boxHeight < 0) {\n        return;\n      }\n\n      // Set the ctx for the box\n      ctx.save();\n\n      const lineWidth = valueOrDefault(legendItem.lineWidth, 1);\n      ctx.fillStyle = valueOrDefault(legendItem.fillStyle, defaultColor);\n      ctx.lineCap = valueOrDefault(legendItem.lineCap, 'butt');\n      ctx.lineDashOffset = valueOrDefault(legendItem.lineDashOffset, 0);\n      ctx.lineJoin = valueOrDefault(legendItem.lineJoin, 'miter');\n      ctx.lineWidth = lineWidth;\n      ctx.strokeStyle = valueOrDefault(legendItem.strokeStyle, defaultColor);\n\n      ctx.setLineDash(valueOrDefault(legendItem.lineDash, []));\n\n      if (labelOpts.usePointStyle) {\n        // Recalculate x and y for drawPoint() because its expecting\n        // x and y to be center of figure (instead of top left)\n        const drawOptions = {\n          radius: boxHeight * Math.SQRT2 / 2,\n          pointStyle: legendItem.pointStyle,\n          rotation: legendItem.rotation,\n          borderWidth: lineWidth\n        };\n        const centerX = rtlHelper.xPlus(x, boxWidth / 2);\n        const centerY = y + halfFontSize;\n\n        // Draw pointStyle as legend symbol\n        drawPointLegend(ctx, drawOptions, centerX, centerY, labelOpts.pointStyleWidth && boxWidth);\n      } else {\n        // Draw box as legend symbol\n        // Adjust position when boxHeight < fontSize (want it centered)\n        const yBoxTop = y + Math.max((fontSize - boxHeight) / 2, 0);\n        const xBoxLeft = rtlHelper.leftForLtr(x, boxWidth);\n        const borderRadius = toTRBLCorners(legendItem.borderRadius);\n\n        ctx.beginPath();\n\n        if (Object.values(borderRadius).some(v => v !== 0)) {\n          addRoundedRectPath(ctx, {\n            x: xBoxLeft,\n            y: yBoxTop,\n            w: boxWidth,\n            h: boxHeight,\n            radius: borderRadius,\n          });\n        } else {\n          ctx.rect(xBoxLeft, yBoxTop, boxWidth, boxHeight);\n        }\n\n        ctx.fill();\n        if (lineWidth !== 0) {\n          ctx.stroke();\n        }\n      }\n\n      ctx.restore();\n    };\n\n    const fillText = function(x, y, legendItem) {\n      renderText(ctx, legendItem.text, x, y + (itemHeight / 2), labelFont, {\n        strikethrough: legendItem.hidden,\n        textAlign: rtlHelper.textAlign(legendItem.textAlign)\n      });\n    };\n\n    // Horizontal\n    const isHorizontal = this.isHorizontal();\n    const titleHeight = this._computeTitleHeight();\n    if (isHorizontal) {\n      cursor = {\n        x: _alignStartEnd(align, this.left + padding, this.right - lineWidths[0]),\n        y: this.top + padding + titleHeight,\n        line: 0\n      };\n    } else {\n      cursor = {\n        x: this.left + padding,\n        y: _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[0].height),\n        line: 0\n      };\n    }\n\n    overrideTextDirection(this.ctx, opts.textDirection);\n\n    const lineHeight = itemHeight + padding;\n    this.legendItems.forEach((legendItem, i) => {\n      ctx.strokeStyle = legendItem.fontColor; // for strikethrough effect\n      ctx.fillStyle = legendItem.fontColor; // render in correct colour\n\n      const textWidth = ctx.measureText(legendItem.text).width;\n      const textAlign = rtlHelper.textAlign(legendItem.textAlign || (legendItem.textAlign = labelOpts.textAlign));\n      const width = boxWidth + halfFontSize + textWidth;\n      let x = cursor.x;\n      let y = cursor.y;\n\n      rtlHelper.setWidth(this.width);\n\n      if (isHorizontal) {\n        if (i > 0 && x + width + padding > this.right) {\n          y = cursor.y += lineHeight;\n          cursor.line++;\n          x = cursor.x = _alignStartEnd(align, this.left + padding, this.right - lineWidths[cursor.line]);\n        }\n      } else if (i > 0 && y + lineHeight > this.bottom) {\n        x = cursor.x = x + columnSizes[cursor.line].width + padding;\n        cursor.line++;\n        y = cursor.y = _alignStartEnd(align, this.top + titleHeight + padding, this.bottom - columnSizes[cursor.line].height);\n      }\n\n      const realX = rtlHelper.x(x);\n\n      drawLegendBox(realX, y, legendItem);\n\n      x = _textX(textAlign, x + boxWidth + halfFontSize, isHorizontal ? x + width : this.right, opts.rtl);\n\n      // Fill the actual label\n      fillText(rtlHelper.x(x), y, legendItem);\n\n      if (isHorizontal) {\n        cursor.x += width + padding;\n      } else if (typeof legendItem.text !== 'string') {\n        const fontLineHeight = labelFont.lineHeight;\n        cursor.y += calculateLegendItemHeight(legendItem, fontLineHeight);\n      } else {\n        cursor.y += lineHeight;\n      }\n    });\n\n    restoreTextDirection(this.ctx, opts.textDirection);\n  }\n\n  /**\n\t * @protected\n\t */\n  drawTitle() {\n    const opts = this.options;\n    const titleOpts = opts.title;\n    const titleFont = toFont(titleOpts.font);\n    const titlePadding = toPadding(titleOpts.padding);\n\n    if (!titleOpts.display) {\n      return;\n    }\n\n    const rtlHelper = getRtlAdapter(opts.rtl, this.left, this.width);\n    const ctx = this.ctx;\n    const position = titleOpts.position;\n    const halfFontSize = titleFont.size / 2;\n    const topPaddingPlusHalfFontSize = titlePadding.top + halfFontSize;\n    let y;\n\n    // These defaults are used when the legend is vertical.\n    // When horizontal, they are computed below.\n    let left = this.left;\n    let maxWidth = this.width;\n\n    if (this.isHorizontal()) {\n      // Move left / right so that the title is above the legend lines\n      maxWidth = Math.max(...this.lineWidths);\n      y = this.top + topPaddingPlusHalfFontSize;\n      left = _alignStartEnd(opts.align, left, this.right - maxWidth);\n    } else {\n      // Move down so that the title is above the legend stack in every alignment\n      const maxHeight = this.columnSizes.reduce((acc, size) => Math.max(acc, size.height), 0);\n      y = topPaddingPlusHalfFontSize + _alignStartEnd(opts.align, this.top, this.bottom - maxHeight - opts.labels.padding - this._computeTitleHeight());\n    }\n\n    // Now that we know the left edge of the inner legend box, compute the correct\n    // X coordinate from the title alignment\n    const x = _alignStartEnd(position, left, left + maxWidth);\n\n    // Canvas setup\n    ctx.textAlign = rtlHelper.textAlign(_toLeftRightCenter(position));\n    ctx.textBaseline = 'middle';\n    ctx.strokeStyle = titleOpts.color;\n    ctx.fillStyle = titleOpts.color;\n    ctx.font = titleFont.string;\n\n    renderText(ctx, titleOpts.text, x, y, titleFont);\n  }\n\n  /**\n\t * @private\n\t */\n  _computeTitleHeight() {\n    const titleOpts = this.options.title;\n    const titleFont = toFont(titleOpts.font);\n    const titlePadding = toPadding(titleOpts.padding);\n    return titleOpts.display ? titleFont.lineHeight + titlePadding.height : 0;\n  }\n\n  /**\n\t * @private\n\t */\n  _getLegendItemAt(x, y) {\n    let i, hitBox, lh;\n\n    if (_isBetween(x, this.left, this.right)\n      && _isBetween(y, this.top, this.bottom)) {\n      // See if we are touching one of the dataset boxes\n      lh = this.legendHitBoxes;\n      for (i = 0; i < lh.length; ++i) {\n        hitBox = lh[i];\n\n        if (_isBetween(x, hitBox.left, hitBox.left + hitBox.width)\n          && _isBetween(y, hitBox.top, hitBox.top + hitBox.height)) {\n          // Touching an element\n          return this.legendItems[i];\n        }\n      }\n    }\n\n    return null;\n  }\n\n  /**\n\t * Handle an event\n\t * @param {ChartEvent} e - The event to handle\n\t */\n  handleEvent(e) {\n    const opts = this.options;\n    if (!isListened(e.type, opts)) {\n      return;\n    }\n\n    // Chart event already has relative position in it\n    const hoveredItem = this._getLegendItemAt(e.x, e.y);\n\n    if (e.type === 'mousemove' || e.type === 'mouseout') {\n      const previous = this._hoveredItem;\n      const sameItem = itemsEqual(previous, hoveredItem);\n      if (previous && !sameItem) {\n        call(opts.onLeave, [e, previous, this], this);\n      }\n\n      this._hoveredItem = hoveredItem;\n\n      if (hoveredItem && !sameItem) {\n        call(opts.onHover, [e, hoveredItem, this], this);\n      }\n    } else if (hoveredItem) {\n      call(opts.onClick, [e, hoveredItem, this], this);\n    }\n  }\n}\n\nfunction calculateItemSize(boxWidth, labelFont, ctx, legendItem, _itemHeight) {\n  const itemWidth = calculateItemWidth(legendItem, boxWidth, labelFont, ctx);\n  const itemHeight = calculateItemHeight(_itemHeight, legendItem, labelFont.lineHeight);\n  return {itemWidth, itemHeight};\n}\n\nfunction calculateItemWidth(legendItem, boxWidth, labelFont, ctx) {\n  let legendItemText = legendItem.text;\n  if (legendItemText && typeof legendItemText !== 'string') {\n    legendItemText = legendItemText.reduce((a, b) => a.length > b.length ? a : b);\n  }\n  return boxWidth + (labelFont.size / 2) + ctx.measureText(legendItemText).width;\n}\n\nfunction calculateItemHeight(_itemHeight, legendItem, fontLineHeight) {\n  let itemHeight = _itemHeight;\n  if (typeof legendItem.text !== 'string') {\n    itemHeight = calculateLegendItemHeight(legendItem, fontLineHeight);\n  }\n  return itemHeight;\n}\n\nfunction calculateLegendItemHeight(legendItem, fontLineHeight) {\n  const labelHeight = legendItem.text ? legendItem.text.length + 0.5 : 0;\n  return fontLineHeight * labelHeight;\n}\n\nfunction isListened(type, opts) {\n  if ((type === 'mousemove' || type === 'mouseout') && (opts.onHover || opts.onLeave)) {\n    return true;\n  }\n  if (opts.onClick && (type === 'click' || type === 'mouseup')) {\n    return true;\n  }\n  return false;\n}\n\nexport default {\n  id: 'legend',\n\n  /**\n\t * For tests\n\t * @private\n\t */\n  _element: Legend,\n\n  start(chart, _args, options) {\n    const legend = chart.legend = new Legend({ctx: chart.ctx, options, chart});\n    layouts.configure(chart, legend, options);\n    layouts.addBox(chart, legend);\n  },\n\n  stop(chart) {\n    layouts.removeBox(chart, chart.legend);\n    delete chart.legend;\n  },\n\n  // During the beforeUpdate step, the layout configuration needs to run\n  // This ensures that if the legend position changes (via an option update)\n  // the layout system respects the change. See https://github.com/chartjs/Chart.js/issues/7527\n  beforeUpdate(chart, _args, options) {\n    const legend = chart.legend;\n    layouts.configure(chart, legend, options);\n    legend.options = options;\n  },\n\n  // The labels need to be built after datasets are updated to ensure that colors\n  // and other styling are correct. See https://github.com/chartjs/Chart.js/issues/6968\n  afterUpdate(chart) {\n    const legend = chart.legend;\n    legend.buildLabels();\n    legend.adjustHitBoxes();\n  },\n\n\n  afterEvent(chart, args) {\n    if (!args.replay) {\n      chart.legend.handleEvent(args.event);\n    }\n  },\n\n  defaults: {\n    display: true,\n    position: 'top',\n    align: 'center',\n    fullSize: true,\n    reverse: false,\n    weight: 1000,\n\n    // a callback that will handle\n    onClick(e, legendItem, legend) {\n      const index = legendItem.datasetIndex;\n      const ci = legend.chart;\n      if (ci.isDatasetVisible(index)) {\n        ci.hide(index);\n        legendItem.hidden = true;\n      } else {\n        ci.show(index);\n        legendItem.hidden = false;\n      }\n    },\n\n    onHover: null,\n    onLeave: null,\n\n    labels: {\n      color: (ctx) => ctx.chart.options.color,\n      boxWidth: 40,\n      padding: 10,\n      // Generates labels shown in the legend\n      // Valid properties to return:\n      // text : text to display\n      // fillStyle : fill of coloured box\n      // strokeStyle: stroke of coloured box\n      // hidden : if this legend item refers to a hidden item\n      // lineCap : cap style for line\n      // lineDash\n      // lineDashOffset :\n      // lineJoin :\n      // lineWidth :\n      generateLabels(chart) {\n        const datasets = chart.data.datasets;\n        const {labels: {usePointStyle, pointStyle, textAlign, color, useBorderRadius, borderRadius}} = chart.legend.options;\n\n        return chart._getSortedDatasetMetas().map((meta) => {\n          const style = meta.controller.getStyle(usePointStyle ? 0 : undefined);\n          const borderWidth = toPadding(style.borderWidth);\n\n          return {\n            text: datasets[meta.index].label,\n            fillStyle: style.backgroundColor,\n            fontColor: color,\n            hidden: !meta.visible,\n            lineCap: style.borderCapStyle,\n            lineDash: style.borderDash,\n            lineDashOffset: style.borderDashOffset,\n            lineJoin: style.borderJoinStyle,\n            lineWidth: (borderWidth.width + borderWidth.height) / 4,\n            strokeStyle: style.borderColor,\n            pointStyle: pointStyle || style.pointStyle,\n            rotation: style.rotation,\n            textAlign: textAlign || style.textAlign,\n            borderRadius: useBorderRadius && (borderRadius || style.borderRadius),\n\n            // Below is extra data used for toggling the datasets\n            datasetIndex: meta.index\n          };\n        }, this);\n      }\n    },\n\n    title: {\n      color: (ctx) => ctx.chart.options.color,\n      display: false,\n      position: 'center',\n      text: '',\n    }\n  },\n\n  descriptors: {\n    _scriptable: (name) => !name.startsWith('on'),\n    labels: {\n      _scriptable: (name) => !['generateLabels', 'filter', 'sort'].includes(name),\n    }\n  },\n};\n","import Element from '../core/core.element';\nimport layouts from '../core/core.layouts';\nimport {PI, isArray, toPadding, toFont} from '../helpers';\nimport {_toLeftRightCenter, _alignStartEnd} from '../helpers/helpers.extras';\nimport {renderText} from '../helpers/helpers.canvas';\n\nexport class Title extends Element {\n  /**\n\t * @param {{ ctx: any; options: any; chart: any; }} config\n\t */\n  constructor(config) {\n    super();\n\n    this.chart = config.chart;\n    this.options = config.options;\n    this.ctx = config.ctx;\n    this._padding = undefined;\n    this.top = undefined;\n    this.bottom = undefined;\n    this.left = undefined;\n    this.right = undefined;\n    this.width = undefined;\n    this.height = undefined;\n    this.position = undefined;\n    this.weight = undefined;\n    this.fullSize = undefined;\n  }\n\n  update(maxWidth, maxHeight) {\n    const opts = this.options;\n\n    this.left = 0;\n    this.top = 0;\n\n    if (!opts.display) {\n      this.width = this.height = this.right = this.bottom = 0;\n      return;\n    }\n\n    this.width = this.right = maxWidth;\n    this.height = this.bottom = maxHeight;\n\n    const lineCount = isArray(opts.text) ? opts.text.length : 1;\n    this._padding = toPadding(opts.padding);\n    const textSize = lineCount * toFont(opts.font).lineHeight + this._padding.height;\n\n    if (this.isHorizontal()) {\n      this.height = textSize;\n    } else {\n      this.width = textSize;\n    }\n  }\n\n  isHorizontal() {\n    const pos = this.options.position;\n    return pos === 'top' || pos === 'bottom';\n  }\n\n  _drawArgs(offset) {\n    const {top, left, bottom, right, options} = this;\n    const align = options.align;\n    let rotation = 0;\n    let maxWidth, titleX, titleY;\n\n    if (this.isHorizontal()) {\n      titleX = _alignStartEnd(align, left, right);\n      titleY = top + offset;\n      maxWidth = right - left;\n    } else {\n      if (options.position === 'left') {\n        titleX = left + offset;\n        titleY = _alignStartEnd(align, bottom, top);\n        rotation = PI * -0.5;\n      } else {\n        titleX = right - offset;\n        titleY = _alignStartEnd(align, top, bottom);\n        rotation = PI * 0.5;\n      }\n      maxWidth = bottom - top;\n    }\n    return {titleX, titleY, maxWidth, rotation};\n  }\n\n  draw() {\n    const ctx = this.ctx;\n    const opts = this.options;\n\n    if (!opts.display) {\n      return;\n    }\n\n    const fontOpts = toFont(opts.font);\n    const lineHeight = fontOpts.lineHeight;\n    const offset = lineHeight / 2 + this._padding.top;\n    const {titleX, titleY, maxWidth, rotation} = this._drawArgs(offset);\n\n    renderText(ctx, opts.text, 0, 0, fontOpts, {\n      color: opts.color,\n      maxWidth,\n      rotation,\n      textAlign: _toLeftRightCenter(opts.align),\n      textBaseline: 'middle',\n      translation: [titleX, titleY],\n    });\n  }\n}\n\nfunction createTitle(chart, titleOpts) {\n  const title = new Title({\n    ctx: chart.ctx,\n    options: titleOpts,\n    chart\n  });\n\n  layouts.configure(chart, title, titleOpts);\n  layouts.addBox(chart, title);\n  chart.titleBlock = title;\n}\n\nexport default {\n  id: 'title',\n\n  /**\n\t * For tests\n\t * @private\n\t */\n  _element: Title,\n\n  start(chart, _args, options) {\n    createTitle(chart, options);\n  },\n\n  stop(chart) {\n    const titleBlock = chart.titleBlock;\n    layouts.removeBox(chart, titleBlock);\n    delete chart.titleBlock;\n  },\n\n  beforeUpdate(chart, _args, options) {\n    const title = chart.titleBlock;\n    layouts.configure(chart, title, options);\n    title.options = options;\n  },\n\n  defaults: {\n    align: 'center',\n    display: false,\n    font: {\n      weight: 'bold',\n    },\n    fullSize: true,\n    padding: 10,\n    position: 'top',\n    text: '',\n    weight: 2000         // by default greater than legend (1000) to be above\n  },\n\n  defaultRoutes: {\n    color: 'color'\n  },\n\n  descriptors: {\n    _scriptable: true,\n    _indexable: false,\n  },\n};\n","import {Title} from './plugin.title';\nimport layouts from '../core/core.layouts';\n\nconst map = new WeakMap();\n\nexport default {\n  id: 'subtitle',\n\n  start(chart, _args, options) {\n    const title = new Title({\n      ctx: chart.ctx,\n      options,\n      chart\n    });\n\n    layouts.configure(chart, title, options);\n    layouts.addBox(chart, title);\n    map.set(chart, title);\n  },\n\n  stop(chart) {\n    layouts.removeBox(chart, map.get(chart));\n    map.delete(chart);\n  },\n\n  beforeUpdate(chart, _args, options) {\n    const title = map.get(chart);\n    layouts.configure(chart, title, options);\n    title.options = options;\n  },\n\n  defaults: {\n    align: 'center',\n    display: false,\n    font: {\n      weight: 'normal',\n    },\n    fullSize: true,\n    padding: 0,\n    position: 'top',\n    text: '',\n    weight: 1500         // by default greater than legend (1000) and smaller than title (2000)\n  },\n\n  defaultRoutes: {\n    color: 'color'\n  },\n\n  descriptors: {\n    _scriptable: true,\n    _indexable: false,\n  },\n};\n","import Animations from '../core/core.animations';\nimport Element from '../core/core.element';\nimport {addRoundedRectPath} from '../helpers/helpers.canvas';\nimport {each, noop, isNullOrUndef, isArray, _elementsEqual, isObject} from '../helpers/helpers.core';\nimport {toFont, toPadding, toTRBLCorners} from '../helpers/helpers.options';\nimport {getRtlAdapter, overrideTextDirection, restoreTextDirection} from '../helpers/helpers.rtl';\nimport {distanceBetweenPoints, _limitValue} from '../helpers/helpers.math';\nimport {createContext, drawPoint} from '../helpers';\n\n/**\n * @typedef { import(\"../platform/platform.base\").Chart } Chart\n * @typedef { import(\"../../types\").ChartEvent } ChartEvent\n * @typedef { import(\"../../types\").ActiveElement } ActiveElement\n * @typedef { import(\"../core/core.interaction\").InteractionItem } InteractionItem\n */\n\nconst positioners = {\n  /**\n\t * Average mode places the tooltip at the average position of the elements shown\n\t */\n  average(items) {\n    if (!items.length) {\n      return false;\n    }\n\n    let i, len;\n    let x = 0;\n    let y = 0;\n    let count = 0;\n\n    for (i = 0, len = items.length; i < len; ++i) {\n      const el = items[i].element;\n      if (el && el.hasValue()) {\n        const pos = el.tooltipPosition();\n        x += pos.x;\n        y += pos.y;\n        ++count;\n      }\n    }\n\n    return {\n      x: x / count,\n      y: y / count\n    };\n  },\n\n  /**\n\t * Gets the tooltip position nearest of the item nearest to the event position\n\t */\n  nearest(items, eventPosition) {\n    if (!items.length) {\n      return false;\n    }\n\n    let x = eventPosition.x;\n    let y = eventPosition.y;\n    let minDistance = Number.POSITIVE_INFINITY;\n    let i, len, nearestElement;\n\n    for (i = 0, len = items.length; i < len; ++i) {\n      const el = items[i].element;\n      if (el && el.hasValue()) {\n        const center = el.getCenterPoint();\n        const d = distanceBetweenPoints(eventPosition, center);\n\n        if (d < minDistance) {\n          minDistance = d;\n          nearestElement = el;\n        }\n      }\n    }\n\n    if (nearestElement) {\n      const tp = nearestElement.tooltipPosition();\n      x = tp.x;\n      y = tp.y;\n    }\n\n    return {\n      x,\n      y\n    };\n  }\n};\n\n// Helper to push or concat based on if the 2nd parameter is an array or not\nfunction pushOrConcat(base, toPush) {\n  if (toPush) {\n    if (isArray(toPush)) {\n      // base = base.concat(toPush);\n      Array.prototype.push.apply(base, toPush);\n    } else {\n      base.push(toPush);\n    }\n  }\n\n  return base;\n}\n\n/**\n * Returns array of strings split by newline\n * @param {*} str - The value to split by newline.\n * @returns {string|string[]} value if newline present - Returned from String split() method\n * @function\n */\nfunction splitNewlines(str) {\n  if ((typeof str === 'string' || str instanceof String) && str.indexOf('\\n') > -1) {\n    return str.split('\\n');\n  }\n  return str;\n}\n\n\n/**\n * Private helper to create a tooltip item model\n * @param {Chart} chart\n * @param {ActiveElement} item - {element, index, datasetIndex} to create the tooltip item for\n * @return new tooltip item\n */\nfunction createTooltipItem(chart, item) {\n  const {element, datasetIndex, index} = item;\n  const controller = chart.getDatasetMeta(datasetIndex).controller;\n  const {label, value} = controller.getLabelAndValue(index);\n\n  return {\n    chart,\n    label,\n    parsed: controller.getParsed(index),\n    raw: chart.data.datasets[datasetIndex].data[index],\n    formattedValue: value,\n    dataset: controller.getDataset(),\n    dataIndex: index,\n    datasetIndex,\n    element\n  };\n}\n\n/**\n * Get the size of the tooltip\n */\nfunction getTooltipSize(tooltip, options) {\n  const ctx = tooltip.chart.ctx;\n  const {body, footer, title} = tooltip;\n  const {boxWidth, boxHeight} = options;\n  const bodyFont = toFont(options.bodyFont);\n  const titleFont = toFont(options.titleFont);\n  const footerFont = toFont(options.footerFont);\n  const titleLineCount = title.length;\n  const footerLineCount = footer.length;\n  const bodyLineItemCount = body.length;\n\n  const padding = toPadding(options.padding);\n  let height = padding.height;\n  let width = 0;\n\n  // Count of all lines in the body\n  let combinedBodyLength = body.reduce((count, bodyItem) => count + bodyItem.before.length + bodyItem.lines.length + bodyItem.after.length, 0);\n  combinedBodyLength += tooltip.beforeBody.length + tooltip.afterBody.length;\n\n  if (titleLineCount) {\n    height += titleLineCount * titleFont.lineHeight\n\t\t\t+ (titleLineCount - 1) * options.titleSpacing\n\t\t\t+ options.titleMarginBottom;\n  }\n  if (combinedBodyLength) {\n    // Body lines may include some extra height depending on boxHeight\n    const bodyLineHeight = options.displayColors ? Math.max(boxHeight, bodyFont.lineHeight) : bodyFont.lineHeight;\n    height += bodyLineItemCount * bodyLineHeight\n\t\t\t+ (combinedBodyLength - bodyLineItemCount) * bodyFont.lineHeight\n\t\t\t+ (combinedBodyLength - 1) * options.bodySpacing;\n  }\n  if (footerLineCount) {\n    height += options.footerMarginTop\n\t\t\t+ footerLineCount * footerFont.lineHeight\n\t\t\t+ (footerLineCount - 1) * options.footerSpacing;\n  }\n\n  // Title width\n  let widthPadding = 0;\n  const maxLineWidth = function(line) {\n    width = Math.max(width, ctx.measureText(line).width + widthPadding);\n  };\n\n  ctx.save();\n\n  ctx.font = titleFont.string;\n  each(tooltip.title, maxLineWidth);\n\n  // Body width\n  ctx.font = bodyFont.string;\n  each(tooltip.beforeBody.concat(tooltip.afterBody), maxLineWidth);\n\n  // Body lines may include some extra width due to the color box\n  widthPadding = options.displayColors ? (boxWidth + 2 + options.boxPadding) : 0;\n  each(body, (bodyItem) => {\n    each(bodyItem.before, maxLineWidth);\n    each(bodyItem.lines, maxLineWidth);\n    each(bodyItem.after, maxLineWidth);\n  });\n\n  // Reset back to 0\n  widthPadding = 0;\n\n  // Footer width\n  ctx.font = footerFont.string;\n  each(tooltip.footer, maxLineWidth);\n\n  ctx.restore();\n\n  // Add padding\n  width += padding.width;\n\n  return {width, height};\n}\n\nfunction determineYAlign(chart, size) {\n  const {y, height} = size;\n\n  if (y < height / 2) {\n    return 'top';\n  } else if (y > (chart.height - height / 2)) {\n    return 'bottom';\n  }\n  return 'center';\n}\n\nfunction doesNotFitWithAlign(xAlign, chart, options, size) {\n  const {x, width} = size;\n  const caret = options.caretSize + options.caretPadding;\n  if (xAlign === 'left' && x + width + caret > chart.width) {\n    return true;\n  }\n\n  if (xAlign === 'right' && x - width - caret < 0) {\n    return true;\n  }\n}\n\nfunction determineXAlign(chart, options, size, yAlign) {\n  const {x, width} = size;\n  const {width: chartWidth, chartArea: {left, right}} = chart;\n  let xAlign = 'center';\n\n  if (yAlign === 'center') {\n    xAlign = x <= (left + right) / 2 ? 'left' : 'right';\n  } else if (x <= width / 2) {\n    xAlign = 'left';\n  } else if (x >= chartWidth - width / 2) {\n    xAlign = 'right';\n  }\n\n  if (doesNotFitWithAlign(xAlign, chart, options, size)) {\n    xAlign = 'center';\n  }\n\n  return xAlign;\n}\n\n/**\n * Helper to get the alignment of a tooltip given the size\n */\nfunction determineAlignment(chart, options, size) {\n  const yAlign = size.yAlign || options.yAlign || determineYAlign(chart, size);\n\n  return {\n    xAlign: size.xAlign || options.xAlign || determineXAlign(chart, options, size, yAlign),\n    yAlign\n  };\n}\n\nfunction alignX(size, xAlign) {\n  let {x, width} = size;\n  if (xAlign === 'right') {\n    x -= width;\n  } else if (xAlign === 'center') {\n    x -= (width / 2);\n  }\n  return x;\n}\n\nfunction alignY(size, yAlign, paddingAndSize) {\n  // eslint-disable-next-line prefer-const\n  let {y, height} = size;\n  if (yAlign === 'top') {\n    y += paddingAndSize;\n  } else if (yAlign === 'bottom') {\n    y -= height + paddingAndSize;\n  } else {\n    y -= (height / 2);\n  }\n  return y;\n}\n\n/**\n * Helper to get the location a tooltip needs to be placed at given the initial position (via the vm) and the size and alignment\n */\nfunction getBackgroundPoint(options, size, alignment, chart) {\n  const {caretSize, caretPadding, cornerRadius} = options;\n  const {xAlign, yAlign} = alignment;\n  const paddingAndSize = caretSize + caretPadding;\n  const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);\n\n  let x = alignX(size, xAlign);\n  const y = alignY(size, yAlign, paddingAndSize);\n\n  if (yAlign === 'center') {\n    if (xAlign === 'left') {\n      x += paddingAndSize;\n    } else if (xAlign === 'right') {\n      x -= paddingAndSize;\n    }\n  } else if (xAlign === 'left') {\n    x -= Math.max(topLeft, bottomLeft) + caretSize;\n  } else if (xAlign === 'right') {\n    x += Math.max(topRight, bottomRight) + caretSize;\n  }\n\n  return {\n    x: _limitValue(x, 0, chart.width - size.width),\n    y: _limitValue(y, 0, chart.height - size.height)\n  };\n}\n\nfunction getAlignedX(tooltip, align, options) {\n  const padding = toPadding(options.padding);\n\n  return align === 'center'\n    ? tooltip.x + tooltip.width / 2\n    : align === 'right'\n      ? tooltip.x + tooltip.width - padding.right\n      : tooltip.x + padding.left;\n}\n\n/**\n * Helper to build before and after body lines\n */\nfunction getBeforeAfterBodyLines(callback) {\n  return pushOrConcat([], splitNewlines(callback));\n}\n\nfunction createTooltipContext(parent, tooltip, tooltipItems) {\n  return createContext(parent, {\n    tooltip,\n    tooltipItems,\n    type: 'tooltip'\n  });\n}\n\nfunction overrideCallbacks(callbacks, context) {\n  const override = context && context.dataset && context.dataset.tooltip && context.dataset.tooltip.callbacks;\n  return override ? callbacks.override(override) : callbacks;\n}\n\nconst defaultCallbacks = {\n  // Args are: (tooltipItems, data)\n  beforeTitle: noop,\n  title(tooltipItems) {\n    if (tooltipItems.length > 0) {\n      const item = tooltipItems[0];\n      const labels = item.chart.data.labels;\n      const labelCount = labels ? labels.length : 0;\n\n      if (this && this.options && this.options.mode === 'dataset') {\n        return item.dataset.label || '';\n      } else if (item.label) {\n        return item.label;\n      } else if (labelCount > 0 && item.dataIndex < labelCount) {\n        return labels[item.dataIndex];\n      }\n    }\n\n    return '';\n  },\n  afterTitle: noop,\n\n  // Args are: (tooltipItems, data)\n  beforeBody: noop,\n\n  // Args are: (tooltipItem, data)\n  beforeLabel: noop,\n  label(tooltipItem) {\n    if (this && this.options && this.options.mode === 'dataset') {\n      return tooltipItem.label + ': ' + tooltipItem.formattedValue || tooltipItem.formattedValue;\n    }\n\n    let label = tooltipItem.dataset.label || '';\n\n    if (label) {\n      label += ': ';\n    }\n    const value = tooltipItem.formattedValue;\n    if (!isNullOrUndef(value)) {\n      label += value;\n    }\n    return label;\n  },\n  labelColor(tooltipItem) {\n    const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);\n    const options = meta.controller.getStyle(tooltipItem.dataIndex);\n    return {\n      borderColor: options.borderColor,\n      backgroundColor: options.backgroundColor,\n      borderWidth: options.borderWidth,\n      borderDash: options.borderDash,\n      borderDashOffset: options.borderDashOffset,\n      borderRadius: 0,\n    };\n  },\n  labelTextColor() {\n    return this.options.bodyColor;\n  },\n  labelPointStyle(tooltipItem) {\n    const meta = tooltipItem.chart.getDatasetMeta(tooltipItem.datasetIndex);\n    const options = meta.controller.getStyle(tooltipItem.dataIndex);\n    return {\n      pointStyle: options.pointStyle,\n      rotation: options.rotation,\n    };\n  },\n  afterLabel: noop,\n\n  // Args are: (tooltipItems, data)\n  afterBody: noop,\n\n  // Args are: (tooltipItems, data)\n  beforeFooter: noop,\n  footer: noop,\n  afterFooter: noop\n};\n\n/**\n * Invoke callback from object with context and arguments.\n * If callback returns `undefined`, then will be invoked default callback.\n * @param {Record<keyof typeof defaultCallbacks, Function>} callbacks\n * @param {keyof typeof defaultCallbacks} name\n * @param {*} ctx\n * @param {*} arg\n * @returns {any}\n */\nfunction invokeCallbackWithFallback(callbacks, name, ctx, arg) {\n  const result = callbacks[name].call(ctx, arg);\n\n  if (typeof result === 'undefined') {\n    return defaultCallbacks[name].call(ctx, arg);\n  }\n\n  return result;\n}\n\nexport class Tooltip extends Element {\n\n  /**\n   * @namespace Chart.Tooltip.positioners\n   */\n  static positioners = positioners;\n\n  constructor(config) {\n    super();\n\n    this.opacity = 0;\n    this._active = [];\n    this._eventPosition = undefined;\n    this._size = undefined;\n    this._cachedAnimations = undefined;\n    this._tooltipItems = [];\n    this.$animations = undefined;\n    this.$context = undefined;\n    this.chart = config.chart;\n    this.options = config.options;\n    this.dataPoints = undefined;\n    this.title = undefined;\n    this.beforeBody = undefined;\n    this.body = undefined;\n    this.afterBody = undefined;\n    this.footer = undefined;\n    this.xAlign = undefined;\n    this.yAlign = undefined;\n    this.x = undefined;\n    this.y = undefined;\n    this.height = undefined;\n    this.width = undefined;\n    this.caretX = undefined;\n    this.caretY = undefined;\n    // TODO: V4, make this private, rename to `_labelStyles`, and combine with `labelPointStyles`\n    // and `labelTextColors` to create a single variable\n    this.labelColors = undefined;\n    this.labelPointStyles = undefined;\n    this.labelTextColors = undefined;\n  }\n\n  initialize(options) {\n    this.options = options;\n    this._cachedAnimations = undefined;\n    this.$context = undefined;\n  }\n\n  /**\n\t * @private\n\t */\n  _resolveAnimations() {\n    const cached = this._cachedAnimations;\n\n    if (cached) {\n      return cached;\n    }\n\n    const chart = this.chart;\n    const options = this.options.setContext(this.getContext());\n    const opts = options.enabled && chart.options.animation && options.animations;\n    const animations = new Animations(this.chart, opts);\n    if (opts._cacheable) {\n      this._cachedAnimations = Object.freeze(animations);\n    }\n\n    return animations;\n  }\n\n  /**\n\t * @protected\n\t */\n  getContext() {\n    return this.$context ||\n\t\t\t(this.$context = createTooltipContext(this.chart.getContext(), this, this._tooltipItems));\n  }\n\n  getTitle(context, options) {\n    const {callbacks} = options;\n\n    const beforeTitle = invokeCallbackWithFallback(callbacks, 'beforeTitle', this, context);\n    const title = invokeCallbackWithFallback(callbacks, 'title', this, context);\n    const afterTitle = invokeCallbackWithFallback(callbacks, 'afterTitle', this, context);\n\n    let lines = [];\n    lines = pushOrConcat(lines, splitNewlines(beforeTitle));\n    lines = pushOrConcat(lines, splitNewlines(title));\n    lines = pushOrConcat(lines, splitNewlines(afterTitle));\n\n    return lines;\n  }\n\n  getBeforeBody(tooltipItems, options) {\n    return getBeforeAfterBodyLines(\n      invokeCallbackWithFallback(options.callbacks, 'beforeBody', this, tooltipItems)\n    );\n  }\n\n  getBody(tooltipItems, options) {\n    const {callbacks} = options;\n    const bodyItems = [];\n\n    each(tooltipItems, (context) => {\n      const bodyItem = {\n        before: [],\n        lines: [],\n        after: []\n      };\n      const scoped = overrideCallbacks(callbacks, context);\n      pushOrConcat(bodyItem.before, splitNewlines(invokeCallbackWithFallback(scoped, 'beforeLabel', this, context)));\n      pushOrConcat(bodyItem.lines, invokeCallbackWithFallback(scoped, 'label', this, context));\n      pushOrConcat(bodyItem.after, splitNewlines(invokeCallbackWithFallback(scoped, 'afterLabel', this, context)));\n\n      bodyItems.push(bodyItem);\n    });\n\n    return bodyItems;\n  }\n\n  getAfterBody(tooltipItems, options) {\n    return getBeforeAfterBodyLines(\n      invokeCallbackWithFallback(options.callbacks, 'afterBody', this, tooltipItems)\n    );\n  }\n\n  // Get the footer and beforeFooter and afterFooter lines\n  getFooter(tooltipItems, options) {\n    const {callbacks} = options;\n\n    const beforeFooter = invokeCallbackWithFallback(callbacks, 'beforeFooter', this, tooltipItems);\n    const footer = invokeCallbackWithFallback(callbacks, 'footer', this, tooltipItems);\n    const afterFooter = invokeCallbackWithFallback(callbacks, 'afterFooter', this, tooltipItems);\n\n    let lines = [];\n    lines = pushOrConcat(lines, splitNewlines(beforeFooter));\n    lines = pushOrConcat(lines, splitNewlines(footer));\n    lines = pushOrConcat(lines, splitNewlines(afterFooter));\n\n    return lines;\n  }\n\n  /**\n\t * @private\n\t */\n  _createItems(options) {\n    const active = this._active;\n    const data = this.chart.data;\n    const labelColors = [];\n    const labelPointStyles = [];\n    const labelTextColors = [];\n    let tooltipItems = [];\n    let i, len;\n\n    for (i = 0, len = active.length; i < len; ++i) {\n      tooltipItems.push(createTooltipItem(this.chart, active[i]));\n    }\n\n    // If the user provided a filter function, use it to modify the tooltip items\n    if (options.filter) {\n      tooltipItems = tooltipItems.filter((element, index, array) => options.filter(element, index, array, data));\n    }\n\n    // If the user provided a sorting function, use it to modify the tooltip items\n    if (options.itemSort) {\n      tooltipItems = tooltipItems.sort((a, b) => options.itemSort(a, b, data));\n    }\n\n    // Determine colors for boxes\n    each(tooltipItems, (context) => {\n      const scoped = overrideCallbacks(options.callbacks, context);\n      labelColors.push(invokeCallbackWithFallback(scoped, 'labelColor', this, context));\n      labelPointStyles.push(invokeCallbackWithFallback(scoped, 'labelPointStyle', this, context));\n      labelTextColors.push(invokeCallbackWithFallback(scoped, 'labelTextColor', this, context));\n    });\n\n    this.labelColors = labelColors;\n    this.labelPointStyles = labelPointStyles;\n    this.labelTextColors = labelTextColors;\n    this.dataPoints = tooltipItems;\n    return tooltipItems;\n  }\n\n  update(changed, replay) {\n    const options = this.options.setContext(this.getContext());\n    const active = this._active;\n    let properties;\n    let tooltipItems = [];\n\n    if (!active.length) {\n      if (this.opacity !== 0) {\n        properties = {\n          opacity: 0\n        };\n      }\n    } else {\n      const position = positioners[options.position].call(this, active, this._eventPosition);\n      tooltipItems = this._createItems(options);\n\n      this.title = this.getTitle(tooltipItems, options);\n      this.beforeBody = this.getBeforeBody(tooltipItems, options);\n      this.body = this.getBody(tooltipItems, options);\n      this.afterBody = this.getAfterBody(tooltipItems, options);\n      this.footer = this.getFooter(tooltipItems, options);\n\n      const size = this._size = getTooltipSize(this, options);\n      const positionAndSize = Object.assign({}, position, size);\n      const alignment = determineAlignment(this.chart, options, positionAndSize);\n      const backgroundPoint = getBackgroundPoint(options, positionAndSize, alignment, this.chart);\n\n      this.xAlign = alignment.xAlign;\n      this.yAlign = alignment.yAlign;\n\n      properties = {\n        opacity: 1,\n        x: backgroundPoint.x,\n        y: backgroundPoint.y,\n        width: size.width,\n        height: size.height,\n        caretX: position.x,\n        caretY: position.y\n      };\n    }\n\n    this._tooltipItems = tooltipItems;\n    this.$context = undefined;\n\n    if (properties) {\n      this._resolveAnimations().update(this, properties);\n    }\n\n    if (changed && options.external) {\n      options.external.call(this, {chart: this.chart, tooltip: this, replay});\n    }\n  }\n\n  drawCaret(tooltipPoint, ctx, size, options) {\n    const caretPosition = this.getCaretPosition(tooltipPoint, size, options);\n\n    ctx.lineTo(caretPosition.x1, caretPosition.y1);\n    ctx.lineTo(caretPosition.x2, caretPosition.y2);\n    ctx.lineTo(caretPosition.x3, caretPosition.y3);\n  }\n\n  getCaretPosition(tooltipPoint, size, options) {\n    const {xAlign, yAlign} = this;\n    const {caretSize, cornerRadius} = options;\n    const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(cornerRadius);\n    const {x: ptX, y: ptY} = tooltipPoint;\n    const {width, height} = size;\n    let x1, x2, x3, y1, y2, y3;\n\n    if (yAlign === 'center') {\n      y2 = ptY + (height / 2);\n\n      if (xAlign === 'left') {\n        x1 = ptX;\n        x2 = x1 - caretSize;\n\n        // Left draws bottom -> top, this y1 is on the bottom\n        y1 = y2 + caretSize;\n        y3 = y2 - caretSize;\n      } else {\n        x1 = ptX + width;\n        x2 = x1 + caretSize;\n\n        // Right draws top -> bottom, thus y1 is on the top\n        y1 = y2 - caretSize;\n        y3 = y2 + caretSize;\n      }\n\n      x3 = x1;\n    } else {\n      if (xAlign === 'left') {\n        x2 = ptX + Math.max(topLeft, bottomLeft) + (caretSize);\n      } else if (xAlign === 'right') {\n        x2 = ptX + width - Math.max(topRight, bottomRight) - caretSize;\n      } else {\n        x2 = this.caretX;\n      }\n\n      if (yAlign === 'top') {\n        y1 = ptY;\n        y2 = y1 - caretSize;\n\n        // Top draws left -> right, thus x1 is on the left\n        x1 = x2 - caretSize;\n        x3 = x2 + caretSize;\n      } else {\n        y1 = ptY + height;\n        y2 = y1 + caretSize;\n\n        // Bottom draws right -> left, thus x1 is on the right\n        x1 = x2 + caretSize;\n        x3 = x2 - caretSize;\n      }\n      y3 = y1;\n    }\n    return {x1, x2, x3, y1, y2, y3};\n  }\n\n  drawTitle(pt, ctx, options) {\n    const title = this.title;\n    const length = title.length;\n    let titleFont, titleSpacing, i;\n\n    if (length) {\n      const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n\n      pt.x = getAlignedX(this, options.titleAlign, options);\n\n      ctx.textAlign = rtlHelper.textAlign(options.titleAlign);\n      ctx.textBaseline = 'middle';\n\n      titleFont = toFont(options.titleFont);\n      titleSpacing = options.titleSpacing;\n\n      ctx.fillStyle = options.titleColor;\n      ctx.font = titleFont.string;\n\n      for (i = 0; i < length; ++i) {\n        ctx.fillText(title[i], rtlHelper.x(pt.x), pt.y + titleFont.lineHeight / 2);\n        pt.y += titleFont.lineHeight + titleSpacing; // Line Height and spacing\n\n        if (i + 1 === length) {\n          pt.y += options.titleMarginBottom - titleSpacing; // If Last, add margin, remove spacing\n        }\n      }\n    }\n  }\n\n  /**\n\t * @private\n\t */\n  _drawColorBox(ctx, pt, i, rtlHelper, options) {\n    const labelColors = this.labelColors[i];\n    const labelPointStyle = this.labelPointStyles[i];\n    const {boxHeight, boxWidth, boxPadding} = options;\n    const bodyFont = toFont(options.bodyFont);\n    const colorX = getAlignedX(this, 'left', options);\n    const rtlColorX = rtlHelper.x(colorX);\n    const yOffSet = boxHeight < bodyFont.lineHeight ? (bodyFont.lineHeight - boxHeight) / 2 : 0;\n    const colorY = pt.y + yOffSet;\n\n    if (options.usePointStyle) {\n      const drawOptions = {\n        radius: Math.min(boxWidth, boxHeight) / 2, // fit the circle in the box\n        pointStyle: labelPointStyle.pointStyle,\n        rotation: labelPointStyle.rotation,\n        borderWidth: 1\n      };\n      // Recalculate x and y for drawPoint() because its expecting\n      // x and y to be center of figure (instead of top left)\n      const centerX = rtlHelper.leftForLtr(rtlColorX, boxWidth) + boxWidth / 2;\n      const centerY = colorY + boxHeight / 2;\n\n      // Fill the point with white so that colours merge nicely if the opacity is < 1\n      ctx.strokeStyle = options.multiKeyBackground;\n      ctx.fillStyle = options.multiKeyBackground;\n      drawPoint(ctx, drawOptions, centerX, centerY);\n\n      // Draw the point\n      ctx.strokeStyle = labelColors.borderColor;\n      ctx.fillStyle = labelColors.backgroundColor;\n      drawPoint(ctx, drawOptions, centerX, centerY);\n    } else {\n      // Border\n      ctx.lineWidth = isObject(labelColors.borderWidth) ? Math.max(...Object.values(labelColors.borderWidth)) : (labelColors.borderWidth || 1); // TODO, v4 remove fallback\n      ctx.strokeStyle = labelColors.borderColor;\n      ctx.setLineDash(labelColors.borderDash || []);\n      ctx.lineDashOffset = labelColors.borderDashOffset || 0;\n\n      // Fill a white rect so that colours merge nicely if the opacity is < 1\n      const outerX = rtlHelper.leftForLtr(rtlColorX, boxWidth - boxPadding);\n      const innerX = rtlHelper.leftForLtr(rtlHelper.xPlus(rtlColorX, 1), boxWidth - boxPadding - 2);\n      const borderRadius = toTRBLCorners(labelColors.borderRadius);\n\n      if (Object.values(borderRadius).some(v => v !== 0)) {\n        ctx.beginPath();\n        ctx.fillStyle = options.multiKeyBackground;\n        addRoundedRectPath(ctx, {\n          x: outerX,\n          y: colorY,\n          w: boxWidth,\n          h: boxHeight,\n          radius: borderRadius,\n        });\n        ctx.fill();\n        ctx.stroke();\n\n        // Inner square\n        ctx.fillStyle = labelColors.backgroundColor;\n        ctx.beginPath();\n        addRoundedRectPath(ctx, {\n          x: innerX,\n          y: colorY + 1,\n          w: boxWidth - 2,\n          h: boxHeight - 2,\n          radius: borderRadius,\n        });\n        ctx.fill();\n      } else {\n        // Normal rect\n        ctx.fillStyle = options.multiKeyBackground;\n        ctx.fillRect(outerX, colorY, boxWidth, boxHeight);\n        ctx.strokeRect(outerX, colorY, boxWidth, boxHeight);\n        // Inner square\n        ctx.fillStyle = labelColors.backgroundColor;\n        ctx.fillRect(innerX, colorY + 1, boxWidth - 2, boxHeight - 2);\n      }\n    }\n\n    // restore fillStyle\n    ctx.fillStyle = this.labelTextColors[i];\n  }\n\n  drawBody(pt, ctx, options) {\n    const {body} = this;\n    const {bodySpacing, bodyAlign, displayColors, boxHeight, boxWidth, boxPadding} = options;\n    const bodyFont = toFont(options.bodyFont);\n    let bodyLineHeight = bodyFont.lineHeight;\n    let xLinePadding = 0;\n\n    const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n\n    const fillLineOfText = function(line) {\n      ctx.fillText(line, rtlHelper.x(pt.x + xLinePadding), pt.y + bodyLineHeight / 2);\n      pt.y += bodyLineHeight + bodySpacing;\n    };\n\n    const bodyAlignForCalculation = rtlHelper.textAlign(bodyAlign);\n    let bodyItem, textColor, lines, i, j, ilen, jlen;\n\n    ctx.textAlign = bodyAlign;\n    ctx.textBaseline = 'middle';\n    ctx.font = bodyFont.string;\n\n    pt.x = getAlignedX(this, bodyAlignForCalculation, options);\n\n    // Before body lines\n    ctx.fillStyle = options.bodyColor;\n    each(this.beforeBody, fillLineOfText);\n\n    xLinePadding = displayColors && bodyAlignForCalculation !== 'right'\n      ? bodyAlign === 'center' ? (boxWidth / 2 + boxPadding) : (boxWidth + 2 + boxPadding)\n      : 0;\n\n    // Draw body lines now\n    for (i = 0, ilen = body.length; i < ilen; ++i) {\n      bodyItem = body[i];\n      textColor = this.labelTextColors[i];\n\n      ctx.fillStyle = textColor;\n      each(bodyItem.before, fillLineOfText);\n\n      lines = bodyItem.lines;\n      // Draw Legend-like boxes if needed\n      if (displayColors && lines.length) {\n        this._drawColorBox(ctx, pt, i, rtlHelper, options);\n        bodyLineHeight = Math.max(bodyFont.lineHeight, boxHeight);\n      }\n\n      for (j = 0, jlen = lines.length; j < jlen; ++j) {\n        fillLineOfText(lines[j]);\n        // Reset for any lines that don't include colorbox\n        bodyLineHeight = bodyFont.lineHeight;\n      }\n\n      each(bodyItem.after, fillLineOfText);\n    }\n\n    // Reset back to 0 for after body\n    xLinePadding = 0;\n    bodyLineHeight = bodyFont.lineHeight;\n\n    // After body lines\n    each(this.afterBody, fillLineOfText);\n    pt.y -= bodySpacing; // Remove last body spacing\n  }\n\n  drawFooter(pt, ctx, options) {\n    const footer = this.footer;\n    const length = footer.length;\n    let footerFont, i;\n\n    if (length) {\n      const rtlHelper = getRtlAdapter(options.rtl, this.x, this.width);\n\n      pt.x = getAlignedX(this, options.footerAlign, options);\n      pt.y += options.footerMarginTop;\n\n      ctx.textAlign = rtlHelper.textAlign(options.footerAlign);\n      ctx.textBaseline = 'middle';\n\n      footerFont = toFont(options.footerFont);\n\n      ctx.fillStyle = options.footerColor;\n      ctx.font = footerFont.string;\n\n      for (i = 0; i < length; ++i) {\n        ctx.fillText(footer[i], rtlHelper.x(pt.x), pt.y + footerFont.lineHeight / 2);\n        pt.y += footerFont.lineHeight + options.footerSpacing;\n      }\n    }\n  }\n\n  drawBackground(pt, ctx, tooltipSize, options) {\n    const {xAlign, yAlign} = this;\n    const {x, y} = pt;\n    const {width, height} = tooltipSize;\n    const {topLeft, topRight, bottomLeft, bottomRight} = toTRBLCorners(options.cornerRadius);\n\n    ctx.fillStyle = options.backgroundColor;\n    ctx.strokeStyle = options.borderColor;\n    ctx.lineWidth = options.borderWidth;\n\n    ctx.beginPath();\n    ctx.moveTo(x + topLeft, y);\n    if (yAlign === 'top') {\n      this.drawCaret(pt, ctx, tooltipSize, options);\n    }\n    ctx.lineTo(x + width - topRight, y);\n    ctx.quadraticCurveTo(x + width, y, x + width, y + topRight);\n    if (yAlign === 'center' && xAlign === 'right') {\n      this.drawCaret(pt, ctx, tooltipSize, options);\n    }\n    ctx.lineTo(x + width, y + height - bottomRight);\n    ctx.quadraticCurveTo(x + width, y + height, x + width - bottomRight, y + height);\n    if (yAlign === 'bottom') {\n      this.drawCaret(pt, ctx, tooltipSize, options);\n    }\n    ctx.lineTo(x + bottomLeft, y + height);\n    ctx.quadraticCurveTo(x, y + height, x, y + height - bottomLeft);\n    if (yAlign === 'center' && xAlign === 'left') {\n      this.drawCaret(pt, ctx, tooltipSize, options);\n    }\n    ctx.lineTo(x, y + topLeft);\n    ctx.quadraticCurveTo(x, y, x + topLeft, y);\n    ctx.closePath();\n\n    ctx.fill();\n\n    if (options.borderWidth > 0) {\n      ctx.stroke();\n    }\n  }\n\n  /**\n\t * Update x/y animation targets when _active elements are animating too\n\t * @private\n\t */\n  _updateAnimationTarget(options) {\n    const chart = this.chart;\n    const anims = this.$animations;\n    const animX = anims && anims.x;\n    const animY = anims && anims.y;\n    if (animX || animY) {\n      const position = positioners[options.position].call(this, this._active, this._eventPosition);\n      if (!position) {\n        return;\n      }\n      const size = this._size = getTooltipSize(this, options);\n      const positionAndSize = Object.assign({}, position, this._size);\n      const alignment = determineAlignment(chart, options, positionAndSize);\n      const point = getBackgroundPoint(options, positionAndSize, alignment, chart);\n      if (animX._to !== point.x || animY._to !== point.y) {\n        this.xAlign = alignment.xAlign;\n        this.yAlign = alignment.yAlign;\n        this.width = size.width;\n        this.height = size.height;\n        this.caretX = position.x;\n        this.caretY = position.y;\n        this._resolveAnimations().update(this, point);\n      }\n    }\n  }\n\n  /**\n   * Determine if the tooltip will draw anything\n   * @returns {boolean} True if the tooltip will render\n   */\n  _willRender() {\n    return !!this.opacity;\n  }\n\n  draw(ctx) {\n    const options = this.options.setContext(this.getContext());\n    let opacity = this.opacity;\n\n    if (!opacity) {\n      return;\n    }\n\n    this._updateAnimationTarget(options);\n\n    const tooltipSize = {\n      width: this.width,\n      height: this.height\n    };\n    const pt = {\n      x: this.x,\n      y: this.y\n    };\n\n    // IE11/Edge does not like very small opacities, so snap to 0\n    opacity = Math.abs(opacity) < 1e-3 ? 0 : opacity;\n\n    const padding = toPadding(options.padding);\n\n    // Truthy/falsey value for empty tooltip\n    const hasTooltipContent = this.title.length || this.beforeBody.length || this.body.length || this.afterBody.length || this.footer.length;\n\n    if (options.enabled && hasTooltipContent) {\n      ctx.save();\n      ctx.globalAlpha = opacity;\n\n      // Draw Background\n      this.drawBackground(pt, ctx, tooltipSize, options);\n\n      overrideTextDirection(ctx, options.textDirection);\n\n      pt.y += padding.top;\n\n      // Titles\n      this.drawTitle(pt, ctx, options);\n\n      // Body\n      this.drawBody(pt, ctx, options);\n\n      // Footer\n      this.drawFooter(pt, ctx, options);\n\n      restoreTextDirection(ctx, options.textDirection);\n\n      ctx.restore();\n    }\n  }\n\n  /**\n\t * Get active elements in the tooltip\n\t * @returns {Array} Array of elements that are active in the tooltip\n\t */\n  getActiveElements() {\n    return this._active || [];\n  }\n\n  /**\n\t * Set active elements in the tooltip\n\t * @param {array} activeElements Array of active datasetIndex/index pairs.\n\t * @param {object} eventPosition Synthetic event position used in positioning\n\t */\n  setActiveElements(activeElements, eventPosition) {\n    const lastActive = this._active;\n    const active = activeElements.map(({datasetIndex, index}) => {\n      const meta = this.chart.getDatasetMeta(datasetIndex);\n\n      if (!meta) {\n        throw new Error('Cannot find a d
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