chart.js
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Simple HTML5 charts using the canvas element.
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{"version":3,"file":"helpers.dataset.cjs","sources":["../../src/helpers/helpers.core.ts","../../src/helpers/helpers.math.ts","../../src/helpers/helpers.collection.ts","../../src/helpers/helpers.extras.ts","../../src/helpers/helpers.easing.ts","../../src/helpers/helpers.color.ts","../../src/core/core.animations.defaults.js","../../src/core/core.layouts.defaults.js","../../src/helpers/helpers.intl.ts","../../src/core/core.ticks.js","../../src/core/core.scale.defaults.js","../../src/core/core.defaults.js","../../src/helpers/helpers.canvas.ts","../../src/helpers/helpers.options.ts","../../src/helpers/helpers.config.ts","../../src/helpers/helpers.curve.ts","../../src/helpers/helpers.dom.ts","../../src/helpers/helpers.interpolation.ts","../../src/helpers/helpers.rtl.ts","../../src/helpers/helpers.segment.js","../../src/helpers/helpers.dataset.ts"],"sourcesContent":["/**\n * @namespace Chart.helpers\n */\n\nimport type {AnyObject} from '../types/basic.js';\nimport type {ActiveDataPoint, ChartEvent} from '../types/index.js';\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 || 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): any {\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.js';\nimport {isFinite as isFiniteNumber} from './helpers.core.js';\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\n/**\n * Verifies that attempting to coerce n to string or number won't throw a TypeError.\n */\nfunction isNonPrimitive(n: unknown) {\n return typeof n === 'symbol' || (typeof n === 'object' && n !== null && !(Symbol.toPrimitive in n || 'toString' in n || 'valueOf' in n));\n}\n\nexport function isNumber(n: unknown): n is number {\n return !isNonPrimitive(n) && !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.js';\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>(items);\n\n if (set.size === items.length) {\n return items;\n }\n\n return Array.from(set);\n}\n","import type {ChartMeta, PointElement} from '../types/index.js';\n\nimport {_limitValue} from './helpers.math.js';\nimport {_lookupByKey} from './helpers.collection.js';\nimport {isNullOrUndef} from './helpers.core.js';\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 argsToUse = [] as TArgs;\n let ticking = false;\n\n return function(...args: TArgs) {\n // Save the args for use later\n argsToUse = args;\n if (!ticking) {\n ticking = true;\n requestAnimFrame.call(window, () => {\n ticking = false;\n fn.apply(thisArg, argsToUse);\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(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, vScale, _parsed} = meta;\n const spanGaps = meta.dataset ? meta.dataset.options ? meta.dataset.options.spanGaps : null : null;\n const axis = iScale.axis;\n const {min, max, minDefined, maxDefined} = iScale.getUserBounds();\n\n if (minDefined) {\n start = Math.min(\n // @ts-expect-error Need to type _parsed\n _lookupByKey(_parsed, axis, min).lo,\n // @ts-expect-error Need to fix types on _lookupByKey\n animationsDisabled ? pointCount : _lookupByKey(points, axis, iScale.getPixelForValue(min)).lo);\n if (spanGaps) {\n const distanceToDefinedLo = (_parsed\n .slice(0, start + 1)\n .reverse()\n .findIndex(\n point => !isNullOrUndef(point[vScale.axis])));\n start -= Math.max(0, distanceToDefinedLo);\n }\n start = _limitValue(start, 0, pointCount - 1);\n }\n if (maxDefined) {\n let end = 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 if (spanGaps) {\n const distanceToDefinedHi = (_parsed\n .slice(end - 1)\n .findIndex(\n point => !isNullOrUndef(point[vScale.axis])));\n end += Math.max(0, distanceToDefinedHi);\n }\n count = _limitValue(end, 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 {PI, TAU, HALF_PI} from './helpers.math.js';\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 {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 : new Color(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 : new Color(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","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","\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.js';\nimport {formatNumber} from '../helpers/helpers.intl.js';\nimport {log10} from '../helpers/helpers.math.js';\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\n // When datasets have values approaching Number.MAX_VALUE, the tick calculations might result in\n // infinity and eventually NaN. Passing NaN for minimumFractionDigits or maximumFractionDigits\n // will make the number formatter throw. So instead we check for isNaN and use a fallback value.\n //\n // toFixed has a max of 20 decimal places\n const numDecimal = isNaN(logDelta) ? 1 : Math.max(Math.min(-1 * Math.floor(logDelta), 20), 0);\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 Ticks from './core.ticks.js';\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 clip: true,\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 {getHoverColor} from '../helpers/helpers.color.js';\nimport {isObject, merge, valueOrDefault} from '../helpers/helpers.core.js';\nimport {applyAnimationsDefaults} from './core.animations.defaults.js';\nimport {applyLayoutsDefaults} from './core.layouts.defaults.js';\nimport {applyScaleDefaults} from './core.scale.defaults.js';\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","import type {\n Chart,\n Point,\n FontSpec,\n CanvasFontSpec,\n PointStyle,\n RenderTextOpts,\n BackdropOptions\n} from '../types/index.js';\nimport type {\n TRBL,\n SplinePoint,\n RoundedRect,\n TRBLCorners\n} from '../types/geometric.js';\nimport {isArray, isNullOrUndef} from './helpers.core.js';\nimport {PI, TAU, HALF_PI, QUARTER_PI, TWO_THIRDS_PI, RAD_PER_DEG} from './helpers.math.js';\n\n/**\n * Converts the given font object into a CSS font string.\n * @param font - A font object.\n * @return The CSS font string. See https://developer.mozilla.org/en-US/docs/Web/CSS/font\n * @private\n */\nexport function toFontString(font: FontSpec) {\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(\n ctx: CanvasRenderingContext2D,\n data: Record<string, number>,\n gc: string[],\n longest: number,\n string: string\n) {\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\ntype Thing = string | undefined | null\ntype Things = (Thing | Thing[])[]\n\n/**\n * @private\n */\n// eslint-disable-next-line complexity\nexport function _longestText(\n ctx: CanvasRenderingContext2D,\n font: string,\n arrayOfThings: Things,\n cache?: {data?: Record<string, number>, garbageCollect?: string[], font?: string}\n) {\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: number, j: number, jlen: number, thing: Thing | Thing[], nestedThing: Thing | Thing[];\n for (i = 0; i < ilen; i++) {\n thing = arrayOfThings[i];\n\n // Undefined strings and a