\r\n );\r\n}\r\n","/**\n * @license React\n * react-is.production.js\n *\n * Copyright (c) Meta Platforms, Inc. and affiliates.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\n\"use strict\";\nvar REACT_ELEMENT_TYPE = Symbol.for(\"react.transitional.element\"),\n REACT_PORTAL_TYPE = Symbol.for(\"react.portal\"),\n REACT_FRAGMENT_TYPE = Symbol.for(\"react.fragment\"),\n REACT_STRICT_MODE_TYPE = Symbol.for(\"react.strict_mode\"),\n REACT_PROFILER_TYPE = Symbol.for(\"react.profiler\");\nSymbol.for(\"react.provider\");\nvar REACT_CONSUMER_TYPE = Symbol.for(\"react.consumer\"),\n REACT_CONTEXT_TYPE = Symbol.for(\"react.context\"),\n REACT_FORWARD_REF_TYPE = Symbol.for(\"react.forward_ref\"),\n REACT_SUSPENSE_TYPE = Symbol.for(\"react.suspense\"),\n REACT_SUSPENSE_LIST_TYPE = Symbol.for(\"react.suspense_list\"),\n REACT_MEMO_TYPE = Symbol.for(\"react.memo\"),\n REACT_LAZY_TYPE = Symbol.for(\"react.lazy\"),\n REACT_OFFSCREEN_TYPE = Symbol.for(\"react.offscreen\"),\n REACT_CLIENT_REFERENCE = Symbol.for(\"react.client.reference\");\nfunction typeOf(object) {\n if (\"object\" === typeof object && null !== object) {\n var $$typeof = object.$$typeof;\n switch ($$typeof) {\n case REACT_ELEMENT_TYPE:\n switch (((object = object.type), object)) {\n case REACT_FRAGMENT_TYPE:\n case REACT_PROFILER_TYPE:\n case REACT_STRICT_MODE_TYPE:\n case REACT_SUSPENSE_TYPE:\n case REACT_SUSPENSE_LIST_TYPE:\n return object;\n default:\n switch (((object = object && object.$$typeof), object)) {\n case REACT_CONTEXT_TYPE:\n case REACT_FORWARD_REF_TYPE:\n case REACT_LAZY_TYPE:\n case REACT_MEMO_TYPE:\n return object;\n case REACT_CONSUMER_TYPE:\n return object;\n default:\n return $$typeof;\n }\n }\n case REACT_PORTAL_TYPE:\n return $$typeof;\n }\n }\n}\nexports.ContextConsumer = REACT_CONSUMER_TYPE;\nexports.ContextProvider = REACT_CONTEXT_TYPE;\nexports.Element = REACT_ELEMENT_TYPE;\nexports.ForwardRef = REACT_FORWARD_REF_TYPE;\nexports.Fragment = REACT_FRAGMENT_TYPE;\nexports.Lazy = REACT_LAZY_TYPE;\nexports.Memo = REACT_MEMO_TYPE;\nexports.Portal = REACT_PORTAL_TYPE;\nexports.Profiler = REACT_PROFILER_TYPE;\nexports.StrictMode = REACT_STRICT_MODE_TYPE;\nexports.Suspense = REACT_SUSPENSE_TYPE;\nexports.SuspenseList = REACT_SUSPENSE_LIST_TYPE;\nexports.isContextConsumer = function (object) {\n return typeOf(object) === REACT_CONSUMER_TYPE;\n};\nexports.isContextProvider = function (object) {\n return typeOf(object) === REACT_CONTEXT_TYPE;\n};\nexports.isElement = function (object) {\n return (\n \"object\" === typeof object &&\n null !== object &&\n object.$$typeof === REACT_ELEMENT_TYPE\n );\n};\nexports.isForwardRef = function (object) {\n return typeOf(object) === REACT_FORWARD_REF_TYPE;\n};\nexports.isFragment = function (object) {\n return typeOf(object) === REACT_FRAGMENT_TYPE;\n};\nexports.isLazy = function (object) {\n return typeOf(object) === REACT_LAZY_TYPE;\n};\nexports.isMemo = function (object) {\n return typeOf(object) === REACT_MEMO_TYPE;\n};\nexports.isPortal = function (object) {\n return typeOf(object) === REACT_PORTAL_TYPE;\n};\nexports.isProfiler = function (object) {\n return typeOf(object) === REACT_PROFILER_TYPE;\n};\nexports.isStrictMode = function (object) {\n return typeOf(object) === REACT_STRICT_MODE_TYPE;\n};\nexports.isSuspense = function (object) {\n return typeOf(object) === REACT_SUSPENSE_TYPE;\n};\nexports.isSuspenseList = function (object) {\n return typeOf(object) === REACT_SUSPENSE_LIST_TYPE;\n};\nexports.isValidElementType = function (type) {\n return \"string\" === typeof type ||\n \"function\" === typeof type ||\n type === REACT_FRAGMENT_TYPE ||\n type === REACT_PROFILER_TYPE ||\n type === REACT_STRICT_MODE_TYPE ||\n type === REACT_SUSPENSE_TYPE ||\n type === REACT_SUSPENSE_LIST_TYPE ||\n type === REACT_OFFSCREEN_TYPE ||\n (\"object\" === typeof type &&\n null !== type &&\n (type.$$typeof === REACT_LAZY_TYPE ||\n type.$$typeof === REACT_MEMO_TYPE ||\n type.$$typeof === REACT_CONTEXT_TYPE ||\n type.$$typeof === REACT_CONSUMER_TYPE ||\n type.$$typeof === REACT_FORWARD_REF_TYPE ||\n type.$$typeof === REACT_CLIENT_REFERENCE ||\n void 0 !== type.getModuleId))\n ? !0\n : !1;\n};\nexports.typeOf = typeOf;\n","'use strict';\n\nvar reactIs = require('react-is');\n\n/**\n * Copyright 2015, Yahoo! Inc.\n * Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.\n */\nvar REACT_STATICS = {\n childContextTypes: true,\n contextType: true,\n contextTypes: true,\n defaultProps: true,\n displayName: true,\n getDefaultProps: true,\n getDerivedStateFromError: true,\n getDerivedStateFromProps: true,\n mixins: true,\n propTypes: true,\n type: true\n};\nvar KNOWN_STATICS = {\n name: true,\n length: true,\n prototype: true,\n caller: true,\n callee: true,\n arguments: true,\n arity: true\n};\nvar FORWARD_REF_STATICS = {\n '$$typeof': true,\n render: true,\n defaultProps: true,\n displayName: true,\n propTypes: true\n};\nvar MEMO_STATICS = {\n '$$typeof': true,\n compare: true,\n defaultProps: true,\n displayName: true,\n propTypes: true,\n type: true\n};\nvar TYPE_STATICS = {};\nTYPE_STATICS[reactIs.ForwardRef] = FORWARD_REF_STATICS;\nTYPE_STATICS[reactIs.Memo] = MEMO_STATICS;\n\nfunction getStatics(component) {\n // React v16.11 and below\n if (reactIs.isMemo(component)) {\n return MEMO_STATICS;\n } // React v16.12 and above\n\n\n return TYPE_STATICS[component['$$typeof']] || REACT_STATICS;\n}\n\nvar defineProperty = Object.defineProperty;\nvar getOwnPropertyNames = Object.getOwnPropertyNames;\nvar getOwnPropertySymbols = Object.getOwnPropertySymbols;\nvar getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;\nvar getPrototypeOf = Object.getPrototypeOf;\nvar objectPrototype = Object.prototype;\nfunction hoistNonReactStatics(targetComponent, sourceComponent, blacklist) {\n if (typeof sourceComponent !== 'string') {\n // don't hoist over string (html) components\n if (objectPrototype) {\n var inheritedComponent = getPrototypeOf(sourceComponent);\n\n if (inheritedComponent && inheritedComponent !== objectPrototype) {\n hoistNonReactStatics(targetComponent, inheritedComponent, blacklist);\n }\n }\n\n var keys = getOwnPropertyNames(sourceComponent);\n\n if (getOwnPropertySymbols) {\n keys = keys.concat(getOwnPropertySymbols(sourceComponent));\n }\n\n var targetStatics = getStatics(targetComponent);\n var sourceStatics = getStatics(sourceComponent);\n\n for (var i = 0; i < keys.length; ++i) {\n var key = keys[i];\n\n if (!KNOWN_STATICS[key] && !(blacklist && blacklist[key]) && !(sourceStatics && sourceStatics[key]) && !(targetStatics && targetStatics[key])) {\n var descriptor = getOwnPropertyDescriptor(sourceComponent, key);\n\n try {\n // Avoid failures from read-only properties\n defineProperty(targetComponent, key, descriptor);\n } catch (e) {}\n }\n }\n }\n\n return targetComponent;\n}\n\nmodule.exports = hoistNonReactStatics;\n","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n module.exports = require('./cjs/react-jsx-runtime.production.min.js');\n} else {\n module.exports = require('./cjs/react-jsx-runtime.development.js');\n}\n","export const reflow = node => node.scrollTop;\nexport function getTransitionProps(props, options) {\n var _style$transitionDura, _style$transitionTimi;\n const {\n timeout,\n easing,\n style = {}\n } = props;\n return {\n duration: (_style$transitionDura = style.transitionDuration) != null ? _style$transitionDura : typeof timeout === 'number' ? timeout : timeout[options.mode] || 0,\n easing: (_style$transitionTimi = style.transitionTimingFunction) != null ? _style$transitionTimi : typeof easing === 'object' ? easing[options.mode] : easing,\n delay: style.transitionDelay\n };\n}","'use strict';\n\nif (process.env.NODE_ENV === 'production') {\n module.exports = require('./cjs/react-is.production.min.js');\n} else {\n module.exports = require('./cjs/react-is.development.js');\n}\n","import _extends from \"@babel/runtime/helpers/esm/extends\";\nimport _objectWithoutPropertiesLoose from \"@babel/runtime/helpers/esm/objectWithoutPropertiesLoose\";\nconst _excluded = [\"value\"];\nimport * as React from 'react';\nimport PropTypes from 'prop-types';\nimport { jsx as _jsx } from \"react/jsx-runtime\";\nconst RtlContext = /*#__PURE__*/React.createContext();\nfunction RtlProvider(_ref) {\n let {\n value\n } = _ref,\n props = _objectWithoutPropertiesLoose(_ref, _excluded);\n return /*#__PURE__*/_jsx(RtlContext.Provider, _extends({\n value: value != null ? value : true\n }, props));\n}\nprocess.env.NODE_ENV !== \"production\" ? RtlProvider.propTypes = {\n children: PropTypes.node,\n value: PropTypes.bool\n} : void 0;\nexport const useRtl = () => {\n const value = React.useContext(RtlContext);\n return value != null ? value : false;\n};\nexport default RtlProvider;","// @flow\n/* eslint-env browser */\nimport type {Window} from '../../types/window.js';\n\n// shim window for the case of requiring the browser bundle in Node\nexport default ((typeof self !== 'undefined' ? self : ({}: any)): Window);\n","// @flow strict\n\ntype Config = {|\n API_URL: string,\n API_URL_REGEX: RegExp,\n API_TILEJSON_REGEX: RegExp,\n API_FONTS_REGEX: RegExp,\n API_SPRITE_REGEX: RegExp,\n API_STYLE_REGEX: RegExp,\n API_CDN_URL_REGEX: RegExp,\n EVENTS_URL: ?string,\n SESSION_PATH: string,\n FEEDBACK_URL: string,\n REQUIRE_ACCESS_TOKEN: boolean,\n TILE_URL_VERSION: string,\n RASTER_URL_PREFIX: string,\n ACCESS_TOKEN: ?string,\n MAX_PARALLEL_IMAGE_REQUESTS: number\n|};\n\nlet mapboxHTTPURLRegex;\n\nconst config: Config = {\n API_URL: 'https://api.mapbox.com',\n get API_URL_REGEX () {\n if (mapboxHTTPURLRegex == null) {\n const prodMapboxHTTPURLRegex = /^((https?:)?\\/\\/)?([^\\/]+\\.)?mapbox\\.c(n|om)(\\/|\\?|$)/i;\n try {\n mapboxHTTPURLRegex = (process.env.API_URL_REGEX != null) ? new RegExp(process.env.API_URL_REGEX) : prodMapboxHTTPURLRegex;\n } catch (e) {\n mapboxHTTPURLRegex = prodMapboxHTTPURLRegex;\n }\n }\n\n return mapboxHTTPURLRegex;\n },\n get API_TILEJSON_REGEX() {\n // https://docs.mapbox.com/api/maps/mapbox-tiling-service/#retrieve-tilejson-metadata\n return /^((https?:)?\\/\\/)?([^\\/]+\\.)?mapbox\\.c(n|om)(\\/v[0-9]*\\/.*\\.json.*$)/i;\n },\n get API_SPRITE_REGEX() {\n // https://docs.mapbox.com/api/maps/styles/#retrieve-a-sprite-image-or-json\n return /^((https?:)?\\/\\/)?([^\\/]+\\.)?mapbox\\.c(n|om)(\\/styles\\/v[0-9]*\\/)(.*\\/sprite.*\\..*$)/i;\n },\n get API_FONTS_REGEX() {\n // https://docs.mapbox.com/api/maps/fonts/#retrieve-font-glyph-ranges\n return /^((https?:)?\\/\\/)?([^\\/]+\\.)?mapbox\\.c(n|om)(\\/fonts\\/v[0-9]*\\/)(.*\\.pbf.*$)/i;\n },\n get API_STYLE_REGEX() {\n // https://docs.mapbox.com/api/maps/styles/#retrieve-a-style\n return /^((https?:)?\\/\\/)?([^\\/]+\\.)?mapbox\\.c(n|om)(\\/styles\\/v[0-9]*\\/)(.*$)/i;\n },\n get API_CDN_URL_REGEX() {\n return /^((https?:)?\\/\\/)?api\\.mapbox\\.c(n|om)(\\/mapbox-gl-js\\/)(.*$)/i;\n },\n get EVENTS_URL() {\n if (!config.API_URL) { return null; }\n try {\n const url = new URL(config.API_URL);\n if (url.hostname === 'api.mapbox.cn') {\n return 'https://events.mapbox.cn/events/v2';\n } else if (url.hostname === 'api.mapbox.com') {\n return 'https://events.mapbox.com/events/v2';\n } else {\n return null;\n }\n } catch (e) {\n return null;\n }\n },\n SESSION_PATH: '/map-sessions/v1',\n FEEDBACK_URL: 'https://apps.mapbox.com/feedback',\n TILE_URL_VERSION: 'v4',\n RASTER_URL_PREFIX: 'raster/v1',\n REQUIRE_ACCESS_TOKEN: true,\n ACCESS_TOKEN: null,\n MAX_PARALLEL_IMAGE_REQUESTS: 16\n};\n\nexport default config;\n","// @flow strict\n\nimport window from './window.js';\n\nconst exported = {\n supported: false,\n testSupport\n};\n\nexport default exported;\n\nlet glForTesting;\nlet webpCheckComplete = false;\nlet webpImgTest;\nlet webpImgTestOnloadComplete = false;\n\nif (window.document) {\n webpImgTest = window.document.createElement('img');\n webpImgTest.onload = function() {\n if (glForTesting) testWebpTextureUpload(glForTesting);\n glForTesting = null;\n webpImgTestOnloadComplete = true;\n };\n webpImgTest.onerror = function() {\n webpCheckComplete = true;\n glForTesting = null;\n };\n webpImgTest.src = 'data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAQAAAAfQ//73v/+BiOh/AAA=';\n}\n\nfunction testSupport(gl: WebGLRenderingContext) {\n if (webpCheckComplete || !webpImgTest) return;\n\n // HTMLImageElement.complete is set when an image is done loading it's source\n // regardless of whether the load was successful or not.\n // It's possible for an error to set HTMLImageElement.complete to true which would trigger\n // testWebpTextureUpload and mistakenly set exported.supported to true in browsers which don't support webp\n // To avoid this, we set a flag in the image's onload handler and only call testWebpTextureUpload\n // after a successful image load event.\n if (webpImgTestOnloadComplete) {\n testWebpTextureUpload(gl);\n } else {\n glForTesting = gl;\n\n }\n}\n\nfunction testWebpTextureUpload(gl: WebGLRenderingContext) {\n // Edge 18 supports WebP but not uploading a WebP image to a gl texture\n // Test support for this before allowing WebP images.\n // https://github.com/mapbox/mapbox-gl-js/issues/7671\n const texture = gl.createTexture();\n gl.bindTexture(gl.TEXTURE_2D, texture);\n\n try {\n gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, webpImgTest);\n\n // The error does not get triggered in Edge if the context is lost\n if (gl.isContextLost()) return;\n\n exported.supported = true;\n } catch (e) {\n // Catch \"Unspecified Error.\" in Edge 18.\n }\n\n gl.deleteTexture(texture);\n\n webpCheckComplete = true;\n}\n","// @flow\n\n/***** START WARNING REMOVAL OR MODIFICATION OF THE\n* FOLLOWING CODE VIOLATES THE MAPBOX TERMS OF SERVICE ******\n* The following code is used to access Mapbox's APIs. Removal or modification\n* of this code can result in higher fees and/or\n* termination of your account with Mapbox.\n*\n* Under the Mapbox Terms of Service, you may not use this code to access Mapbox\n* Mapping APIs other than through Mapbox SDKs.\n*\n* The Mapping APIs documentation is available at https://docs.mapbox.com/api/maps/#maps\n* and the Mapbox Terms of Service are available at https://www.mapbox.com/tos/\n******************************************************************************/\n\ntype SkuTokenObject = {|\n token: string,\n tokenExpiresAt: number\n|};\n\nconst SKU_ID = '01';\n\nfunction createSkuToken(): SkuTokenObject {\n // SKU_ID and TOKEN_VERSION are specified by an internal schema and should not change\n const TOKEN_VERSION = '1';\n const base62chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';\n // sessionRandomizer is a randomized 10-digit base-62 number\n let sessionRandomizer = '';\n for (let i = 0; i < 10; i++) {\n sessionRandomizer += base62chars[Math.floor(Math.random() * 62)];\n }\n const expiration = 12 * 60 * 60 * 1000; // 12 hours\n const token = [TOKEN_VERSION, SKU_ID, sessionRandomizer].join('');\n const tokenExpiresAt = Date.now() + expiration;\n\n return {token, tokenExpiresAt};\n}\n\nexport {createSkuToken, SKU_ID};\n\n/***** END WARNING - REMOVAL OR MODIFICATION OF THE\nPRECEDING CODE VIOLATES THE MAPBOX TERMS OF SERVICE ******/\n","'use strict';\n\nmodule.exports = UnitBezier;\n\nfunction UnitBezier(p1x, p1y, p2x, p2y) {\n // Calculate the polynomial coefficients, implicit first and last control points are (0,0) and (1,1).\n this.cx = 3.0 * p1x;\n this.bx = 3.0 * (p2x - p1x) - this.cx;\n this.ax = 1.0 - this.cx - this.bx;\n\n this.cy = 3.0 * p1y;\n this.by = 3.0 * (p2y - p1y) - this.cy;\n this.ay = 1.0 - this.cy - this.by;\n\n this.p1x = p1x;\n this.p1y = p1y;\n this.p2x = p2x;\n this.p2y = p2y;\n}\n\nUnitBezier.prototype = {\n sampleCurveX: function (t) {\n // `ax t^3 + bx t^2 + cx t' expanded using Horner's rule.\n return ((this.ax * t + this.bx) * t + this.cx) * t;\n },\n\n sampleCurveY: function (t) {\n return ((this.ay * t + this.by) * t + this.cy) * t;\n },\n\n sampleCurveDerivativeX: function (t) {\n return (3.0 * this.ax * t + 2.0 * this.bx) * t + this.cx;\n },\n\n solveCurveX: function (x, epsilon) {\n if (epsilon === undefined) epsilon = 1e-6;\n\n if (x < 0.0) return 0.0;\n if (x > 1.0) return 1.0;\n\n var t = x;\n\n // First try a few iterations of Newton's method - normally very fast.\n for (var i = 0; i < 8; i++) {\n var x2 = this.sampleCurveX(t) - x;\n if (Math.abs(x2) < epsilon) return t;\n\n var d2 = this.sampleCurveDerivativeX(t);\n if (Math.abs(d2) < 1e-6) break;\n\n t = t - x2 / d2;\n }\n\n // Fall back to the bisection method for reliability.\n var t0 = 0.0;\n var t1 = 1.0;\n t = x;\n\n for (i = 0; i < 20; i++) {\n x2 = this.sampleCurveX(t);\n if (Math.abs(x2 - x) < epsilon) break;\n\n if (x > x2) {\n t0 = t;\n } else {\n t1 = t;\n }\n\n t = (t1 - t0) * 0.5 + t0;\n }\n\n return t;\n },\n\n solve: function (x, epsilon) {\n return this.sampleCurveY(this.solveCurveX(x, epsilon));\n }\n};\n","'use strict';\n\nmodule.exports = Point;\n\n/**\n * A standalone point geometry with useful accessor, comparison, and\n * modification methods.\n *\n * @class Point\n * @param {Number} x the x-coordinate. this could be longitude or screen\n * pixels, or any other sort of unit.\n * @param {Number} y the y-coordinate. this could be latitude or screen\n * pixels, or any other sort of unit.\n * @example\n * var point = new Point(-77, 38);\n */\nfunction Point(x, y) {\n this.x = x;\n this.y = y;\n}\n\nPoint.prototype = {\n\n /**\n * Clone this point, returning a new point that can be modified\n * without affecting the old one.\n * @return {Point} the clone\n */\n clone: function() { return new Point(this.x, this.y); },\n\n /**\n * Add this point's x & y coordinates to another point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n add: function(p) { return this.clone()._add(p); },\n\n /**\n * Subtract this point's x & y coordinates to from point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n sub: function(p) { return this.clone()._sub(p); },\n\n /**\n * Multiply this point's x & y coordinates by point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n multByPoint: function(p) { return this.clone()._multByPoint(p); },\n\n /**\n * Divide this point's x & y coordinates by point,\n * yielding a new point.\n * @param {Point} p the other point\n * @return {Point} output point\n */\n divByPoint: function(p) { return this.clone()._divByPoint(p); },\n\n /**\n * Multiply this point's x & y coordinates by a factor,\n * yielding a new point.\n * @param {Point} k factor\n * @return {Point} output point\n */\n mult: function(k) { return this.clone()._mult(k); },\n\n /**\n * Divide this point's x & y coordinates by a factor,\n * yielding a new point.\n * @param {Point} k factor\n * @return {Point} output point\n */\n div: function(k) { return this.clone()._div(k); },\n\n /**\n * Rotate this point around the 0, 0 origin by an angle a,\n * given in radians\n * @param {Number} a angle to rotate around, in radians\n * @return {Point} output point\n */\n rotate: function(a) { return this.clone()._rotate(a); },\n\n /**\n * Rotate this point around p point by an angle a,\n * given in radians\n * @param {Number} a angle to rotate around, in radians\n * @param {Point} p Point to rotate around\n * @return {Point} output point\n */\n rotateAround: function(a,p) { return this.clone()._rotateAround(a,p); },\n\n /**\n * Multiply this point by a 4x1 transformation matrix\n * @param {Array} m transformation matrix\n * @return {Point} output point\n */\n matMult: function(m) { return this.clone()._matMult(m); },\n\n /**\n * Calculate this point but as a unit vector from 0, 0, meaning\n * that the distance from the resulting point to the 0, 0\n * coordinate will be equal to 1 and the angle from the resulting\n * point to the 0, 0 coordinate will be the same as before.\n * @return {Point} unit vector point\n */\n unit: function() { return this.clone()._unit(); },\n\n /**\n * Compute a perpendicular point, where the new y coordinate\n * is the old x coordinate and the new x coordinate is the old y\n * coordinate multiplied by -1\n * @return {Point} perpendicular point\n */\n perp: function() { return this.clone()._perp(); },\n\n /**\n * Return a version of this point with the x & y coordinates\n * rounded to integers.\n * @return {Point} rounded point\n */\n round: function() { return this.clone()._round(); },\n\n /**\n * Return the magitude of this point: this is the Euclidean\n * distance from the 0, 0 coordinate to this point's x and y\n * coordinates.\n * @return {Number} magnitude\n */\n mag: function() {\n return Math.sqrt(this.x * this.x + this.y * this.y);\n },\n\n /**\n * Judge whether this point is equal to another point, returning\n * true or false.\n * @param {Point} other the other point\n * @return {boolean} whether the points are equal\n */\n equals: function(other) {\n return this.x === other.x &&\n this.y === other.y;\n },\n\n /**\n * Calculate the distance from this point to another point\n * @param {Point} p the other point\n * @return {Number} distance\n */\n dist: function(p) {\n return Math.sqrt(this.distSqr(p));\n },\n\n /**\n * Calculate the distance from this point to another point,\n * without the square root step. Useful if you're comparing\n * relative distances.\n * @param {Point} p the other point\n * @return {Number} distance\n */\n distSqr: function(p) {\n var dx = p.x - this.x,\n dy = p.y - this.y;\n return dx * dx + dy * dy;\n },\n\n /**\n * Get the angle from the 0, 0 coordinate to this point, in radians\n * coordinates.\n * @return {Number} angle\n */\n angle: function() {\n return Math.atan2(this.y, this.x);\n },\n\n /**\n * Get the angle from this point to another point, in radians\n * @param {Point} b the other point\n * @return {Number} angle\n */\n angleTo: function(b) {\n return Math.atan2(this.y - b.y, this.x - b.x);\n },\n\n /**\n * Get the angle between this point and another point, in radians\n * @param {Point} b the other point\n * @return {Number} angle\n */\n angleWith: function(b) {\n return this.angleWithSep(b.x, b.y);\n },\n\n /*\n * Find the angle of the two vectors, solving the formula for\n * the cross product a x b = |a||b|sin(θ) for θ.\n * @param {Number} x the x-coordinate\n * @param {Number} y the y-coordinate\n * @return {Number} the angle in radians\n */\n angleWithSep: function(x, y) {\n return Math.atan2(\n this.x * y - this.y * x,\n this.x * x + this.y * y);\n },\n\n _matMult: function(m) {\n var x = m[0] * this.x + m[1] * this.y,\n y = m[2] * this.x + m[3] * this.y;\n this.x = x;\n this.y = y;\n return this;\n },\n\n _add: function(p) {\n this.x += p.x;\n this.y += p.y;\n return this;\n },\n\n _sub: function(p) {\n this.x -= p.x;\n this.y -= p.y;\n return this;\n },\n\n _mult: function(k) {\n this.x *= k;\n this.y *= k;\n return this;\n },\n\n _div: function(k) {\n this.x /= k;\n this.y /= k;\n return this;\n },\n\n _multByPoint: function(p) {\n this.x *= p.x;\n this.y *= p.y;\n return this;\n },\n\n _divByPoint: function(p) {\n this.x /= p.x;\n this.y /= p.y;\n return this;\n },\n\n _unit: function() {\n this._div(this.mag());\n return this;\n },\n\n _perp: function() {\n var y = this.y;\n this.y = this.x;\n this.x = -y;\n return this;\n },\n\n _rotate: function(angle) {\n var cos = Math.cos(angle),\n sin = Math.sin(angle),\n x = cos * this.x - sin * this.y,\n y = sin * this.x + cos * this.y;\n this.x = x;\n this.y = y;\n return this;\n },\n\n _rotateAround: function(angle, p) {\n var cos = Math.cos(angle),\n sin = Math.sin(angle),\n x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),\n y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);\n this.x = x;\n this.y = y;\n return this;\n },\n\n _round: function() {\n this.x = Math.round(this.x);\n this.y = Math.round(this.y);\n return this;\n }\n};\n\n/**\n * Construct a point from an array if necessary, otherwise if the input\n * is already a Point, or an unknown type, return it unchanged\n * @param {Array|Point|*} a any kind of input value\n * @return {Point} constructed point, or passed-through value.\n * @example\n * // this\n * var point = Point.convert([0, 1]);\n * // is equivalent to\n * var point = new Point(0, 1);\n */\nPoint.convert = function (a) {\n if (a instanceof Point) {\n return a;\n }\n if (Array.isArray(a)) {\n return new Point(a[0], a[1]);\n }\n return a;\n};\n","// @flow\n\nimport UnitBezier from '@mapbox/unitbezier';\n\nimport Point from '@mapbox/point-geometry';\nimport window from './window.js';\nimport assert from 'assert';\n\nimport type {Callback} from '../types/callback.js';\nimport type {Mat4, Vec4} from 'gl-matrix';\n\nconst DEG_TO_RAD = Math.PI / 180;\nconst RAD_TO_DEG = 180 / Math.PI;\n\n/**\n * Converts an angle in degrees to radians\n * copy all properties from the source objects into the destination.\n * The last source object given overrides properties from previous\n * source objects.\n *\n * @param a angle to convert\n * @returns the angle in radians\n * @private\n */\nexport function degToRad(a: number): number {\n return a * DEG_TO_RAD;\n}\n\n/**\n * Converts an angle in radians to degrees\n * copy all properties from the source objects into the destination.\n * The last source object given overrides properties from previous\n * source objects.\n *\n * @param a angle to convert\n * @returns the angle in degrees\n * @private\n */\nexport function radToDeg(a: number): number {\n return a * RAD_TO_DEG;\n}\n\nconst TILE_CORNERS = [[0, 0], [1, 0], [1, 1], [0, 1]];\n\n/**\n * Given a particular bearing, returns the corner of the tile thats farthest\n * along the bearing.\n *\n * @param {number} bearing angle in degrees (-180, 180]\n * @returns {QuadCorner}\n * @private\n */\nexport function furthestTileCorner(bearing: number): [number, number] {\n const alignedBearing = ((bearing + 45) + 360) % 360;\n const cornerIdx = Math.round(alignedBearing / 90) % 4;\n return TILE_CORNERS[cornerIdx];\n}\n\n/**\n * @module util\n * @private\n */\n\n/**\n * Given a value `t` that varies between 0 and 1, return\n * an interpolation function that eases between 0 and 1 in a pleasing\n * cubic in-out fashion.\n *\n * @private\n */\nexport function easeCubicInOut(t: number): number {\n if (t <= 0) return 0;\n if (t >= 1) return 1;\n const t2 = t * t,\n t3 = t2 * t;\n return 4 * (t < 0.5 ? t3 : 3 * (t - t2) + t3 - 0.75);\n}\n\n/**\n * Computes an AABB for a set of points.\n *\n * @param {Point[]} points\n * @returns {{ min: Point, max: Point}}\n * @private\n */\nexport function getBounds(points: Point[]): { min: Point, max: Point} {\n let minX = Infinity;\n let minY = Infinity;\n let maxX = -Infinity;\n let maxY = -Infinity;\n for (const p of points) {\n minX = Math.min(minX, p.x);\n minY = Math.min(minY, p.y);\n maxX = Math.max(maxX, p.x);\n maxY = Math.max(maxY, p.y);\n }\n\n return {\n min: new Point(minX, minY),\n max: new Point(maxX, maxY),\n };\n}\n\n/**\n * Returns the square of the 2D distance between an AABB defined by min and max and a point.\n * If point is null or undefined, the AABB distance from the origin (0,0) is returned.\n *\n * @param {Array} min The minimum extent of the AABB.\n * @param {Array} max The maximum extent of the AABB.\n * @param {Array} [point] The point to compute the distance from, may be undefined.\n * @returns {number} The square distance from the AABB, 0.0 if the AABB contains the point.\n */\nexport function getAABBPointSquareDist(min: Array, max: Array, point: ?Array): number {\n let sqDist = 0.0;\n\n for (let i = 0; i < 2; ++i) {\n const v = point ? point[i] : 0.0;\n assert(min[i] < max[i], 'Invalid aabb min and max inputs, min[i] must be < max[i].');\n if (min[i] > v) sqDist += (min[i] - v) * (min[i] - v);\n if (max[i] < v) sqDist += (v - max[i]) * (v - max[i]);\n }\n\n return sqDist;\n}\n\n/**\n * Converts a AABB into a polygon with clockwise winding order.\n *\n * @param {Point} min The top left point.\n * @param {Point} max The bottom right point.\n * @param {number} [buffer=0] The buffer width.\n * @param {boolean} [close=true] Whether to close the polygon or not.\n * @returns {Point[]} The polygon.\n */\nexport function polygonizeBounds(min: Point, max: Point, buffer: number = 0, close: boolean = true): Point[] {\n const offset = new Point(buffer, buffer);\n const minBuf = min.sub(offset);\n const maxBuf = max.add(offset);\n const polygon = [minBuf, new Point(maxBuf.x, minBuf.y), maxBuf, new Point(minBuf.x, maxBuf.y)];\n\n if (close) {\n polygon.push(minBuf.clone());\n }\n return polygon;\n}\n\n/**\n * Takes a convex ring and expands it outward by applying a buffer around it.\n * This function assumes that the ring is in clockwise winding order.\n *\n * @param {Point[]} ring The input ring.\n * @param {number} buffer The buffer width.\n * @returns {Point[]} The expanded ring.\n */\nexport function bufferConvexPolygon(ring: Point[], buffer: number): Point[] {\n assert(ring.length > 2, 'bufferConvexPolygon requires the ring to have atleast 3 points');\n const output = [];\n for (let currIdx = 0; currIdx < ring.length; currIdx++) {\n const prevIdx = wrap(currIdx - 1, -1, ring.length - 1);\n const nextIdx = wrap(currIdx + 1, -1, ring.length - 1);\n const prev = ring[prevIdx];\n const curr = ring[currIdx];\n const next = ring[nextIdx];\n const p1 = prev.sub(curr).unit();\n const p2 = next.sub(curr).unit();\n const interiorAngle = p2.angleWithSep(p1.x, p1.y);\n // Calcuate a vector that points in the direction of the angle bisector between two sides.\n // Scale it based on a right angled triangle constructed at that corner.\n const offset = p1.add(p2).unit().mult(-1 * buffer / Math.sin(interiorAngle / 2));\n output.push(curr.add(offset));\n }\n return output;\n}\n\ntype EaseFunction = (t: number) => number;\n\n/**\n * Given given (x, y), (x1, y1) control points for a bezier curve,\n * return a function that interpolates along that curve.\n *\n * @param p1x control point 1 x coordinate\n * @param p1y control point 1 y coordinate\n * @param p2x control point 2 x coordinate\n * @param p2y control point 2 y coordinate\n * @private\n */\nexport function bezier(p1x: number, p1y: number, p2x: number, p2y: number): EaseFunction {\n const bezier = new UnitBezier(p1x, p1y, p2x, p2y);\n return function(t: number) {\n return bezier.solve(t);\n };\n}\n\n/**\n * A default bezier-curve powered easing function with\n * control points (0.25, 0.1) and (0.25, 1)\n *\n * @private\n */\nexport const ease: EaseFunction = bezier(0.25, 0.1, 0.25, 1);\n\n/**\n * constrain n to the given range via min + max\n *\n * @param n value\n * @param min the minimum value to be returned\n * @param max the maximum value to be returned\n * @returns the clamped value\n * @private\n */\nexport function clamp(n: number, min: number, max: number): number {\n return Math.min(max, Math.max(min, n));\n}\n\n/**\n * Equivalent to GLSL smoothstep.\n *\n * @param {number} e0 The lower edge of the sigmoid\n * @param {number} e1 The upper edge of the sigmoid\n * @param {number} x the value to be interpolated\n * @returns {number} in the range [0, 1]\n * @private\n */\nexport function smoothstep(e0: number, e1: number, x: number): number {\n x = clamp((x - e0) / (e1 - e0), 0, 1);\n return x * x * (3 - 2 * x);\n}\n\n/**\n * constrain n to the given range, excluding the minimum, via modular arithmetic\n *\n * @param n value\n * @param min the minimum value to be returned, exclusive\n * @param max the maximum value to be returned, inclusive\n * @returns constrained number\n * @private\n */\nexport function wrap(n: number, min: number, max: number): number {\n const d = max - min;\n const w = ((n - min) % d + d) % d + min;\n return (w === min) ? max : w;\n}\n\n/**\n * Computes shortest angle in range [-180, 180) between two angles.\n *\n * @param {*} a First angle in degrees\n * @param {*} b Second angle in degrees\n * @returns Shortest angle\n * @private\n */\nexport function shortestAngle(a: number, b: number): number {\n const diff = (b - a + 180) % 360 - 180;\n return diff < -180 ? diff + 360 : diff;\n}\n\n/*\n * Call an asynchronous function on an array of arguments,\n * calling `callback` with the completed results of all calls.\n *\n * @param array input to each call of the async function.\n * @param fn an async function with signature (data, callback)\n * @param callback a callback run after all async work is done.\n * called with an array, containing the results of each async call.\n * @private\n */\nexport function asyncAll(\n array: Array,\n fn: (item: Item, fnCallback: Callback) => void,\n callback: Callback>\n): void {\n if (!array.length) { return callback(null, []); }\n let remaining = array.length;\n const results = new Array(array.length);\n let error = null;\n array.forEach((item, i) => {\n fn(item, (err, result) => {\n if (err) error = err;\n results[i] = ((result: any): Result); // https://github.com/facebook/flow/issues/2123\n if (--remaining === 0) callback(error, results);\n });\n });\n}\n\n/*\n * Polyfill for Object.values. Not fully spec compliant, but we don't\n * need it to be.\n *\n * @private\n */\nexport function values(obj: {[key: string]: T}): Array {\n const result = [];\n for (const k in obj) {\n result.push(obj[k]);\n }\n return result;\n}\n\n/*\n * Compute the difference between the keys in one object and the keys\n * in another object.\n *\n * @returns keys difference\n * @private\n */\nexport function keysDifference(obj: {[key: string]: S}, other: {[key: string]: T}): Array {\n const difference = [];\n for (const i in obj) {\n if (!(i in other)) {\n difference.push(i);\n }\n }\n return difference;\n}\n\n/**\n * Given a destination object and optionally many source objects,\n * copy all properties from the source objects into the destination.\n * The last source object given overrides properties from previous\n * source objects.\n *\n * @param dest destination object\n * @param sources sources from which properties are pulled\n * @private\n */\nexport function extend(dest: Object, ...sources: Array): Object {\n for (const src of sources) {\n for (const k in src) {\n dest[k] = src[k];\n }\n }\n return dest;\n}\n\n/**\n * Given an object and a number of properties as strings, return version\n * of that object with only those properties.\n *\n * @param src the object\n * @param properties an array of property names chosen\n * to appear on the resulting object.\n * @returns object with limited properties.\n * @example\n * var foo = { name: 'Charlie', age: 10 };\n * var justName = pick(foo, ['name']);\n * // justName = { name: 'Charlie' }\n * @private\n */\nexport function pick(src: Object, properties: Array): Object {\n const result = {};\n for (let i = 0; i < properties.length; i++) {\n const k = properties[i];\n if (k in src) {\n result[k] = src[k];\n }\n }\n return result;\n}\n\nlet id = 1;\n\n/**\n * Return a unique numeric id, starting at 1 and incrementing with\n * each call.\n *\n * @returns unique numeric id.\n * @private\n */\nexport function uniqueId(): number {\n return id++;\n}\n\n/**\n * Return a random UUID (v4). Taken from: https://gist.github.com/jed/982883\n * @private\n */\nexport function uuid(): string {\n function b(a: void) {\n return a ? (a ^ Math.random() * (16 >> a / 4)).toString(16) :\n //$FlowFixMe: Flow doesn't like the implied array literal conversion here\n ([1e7] + -[1e3] + -4e3 + -8e3 + -1e11).replace(/[018]/g, b);\n }\n return b();\n}\n\n/**\n * Return whether a given value is a power of two\n * @private\n */\nexport function isPowerOfTwo(value: number): boolean {\n return (Math.log(value) / Math.LN2) % 1 === 0;\n}\n\n/**\n * Return the next power of two, or the input value if already a power of two\n * @private\n */\nexport function nextPowerOfTwo(value: number): number {\n if (value <= 1) return 1;\n return Math.pow(2, Math.ceil(Math.log(value) / Math.LN2));\n}\n\n/**\n * Return the previous power of two, or the input value if already a power of two\n * @private\n */\nexport function prevPowerOfTwo(value: number): number {\n if (value <= 1) return 1;\n return Math.pow(2, Math.floor(Math.log(value) / Math.LN2));\n}\n\n/**\n * Validate a string to match UUID(v4) of the\n * form: xxxxxxxx-xxxx-4xxx-[89ab]xxx-xxxxxxxxxxxx\n * @param str string to validate.\n * @private\n */\nexport function validateUuid(str: ?string): boolean {\n return str ? /^[0-9a-f]{8}-[0-9a-f]{4}-[4][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i.test(str) : false;\n}\n\n/**\n * Given an array of member function names as strings, replace all of them\n * with bound versions that will always refer to `context` as `this`. This\n * is useful for classes where otherwise event bindings would reassign\n * `this` to the evented object or some other value: this lets you ensure\n * the `this` value always.\n *\n * @param fns list of member function names\n * @param context the context value\n * @example\n * function MyClass() {\n * bindAll(['ontimer'], this);\n * this.name = 'Tom';\n * }\n * MyClass.prototype.ontimer = function() {\n * alert(this.name);\n * };\n * var myClass = new MyClass();\n * setTimeout(myClass.ontimer, 100);\n * @private\n */\nexport function bindAll(fns: Array, context: Object): void {\n fns.forEach((fn) => {\n if (!context[fn]) { return; }\n context[fn] = context[fn].bind(context);\n });\n}\n\n/**\n * Determine if a string ends with a particular substring\n *\n * @private\n */\nexport function endsWith(string: string, suffix: string): boolean {\n return string.indexOf(suffix, string.length - suffix.length) !== -1;\n}\n\n/**\n * Create an object by mapping all the values of an existing object while\n * preserving their keys.\n *\n * @private\n */\n// $FlowFixMe[missing-this-annot]\nexport function mapObject(input: Object, iterator: Function, context?: Object): Object {\n const output = {};\n for (const key in input) {\n output[key] = iterator.call(context || this, input[key], key, input);\n }\n return output;\n}\n\n/**\n * Create an object by filtering out values of an existing object.\n *\n * @private\n */\n// $FlowFixMe[missing-this-annot]\nexport function filterObject(input: Object, iterator: Function, context?: Object): Object {\n const output = {};\n for (const key in input) {\n if (iterator.call(context || this, input[key], key, input)) {\n output[key] = input[key];\n }\n }\n return output;\n}\n\nimport deepEqual from '../style-spec/util/deep_equal.js';\nexport {deepEqual};\n\n/**\n * Deeply clones two objects.\n *\n * @private\n */\nexport function clone(input: T): T {\n if (Array.isArray(input)) {\n return ((input.map(clone): any): T);\n } else if (typeof input === 'object' && input) {\n return ((mapObject(input, clone): any): T);\n } else {\n return input;\n }\n}\n\n/**\n * Maps a value from a range between [min, max] to the range [outMin, outMax]\n *\n * @private\n */\nexport function mapValue(value: number, min: number, max: number, outMin: number, outMax: number): number {\n return clamp((value - min) / (max - min) * (outMax - outMin) + outMin, outMin, outMax);\n}\n\n/**\n * Check if two arrays have at least one common element.\n *\n * @private\n */\nexport function arraysIntersect(a: Array, b: Array): boolean {\n for (let l = 0; l < a.length; l++) {\n if (b.indexOf(a[l]) >= 0) return true;\n }\n return false;\n}\n\n/**\n * Print a warning message to the console and ensure duplicate warning messages\n * are not printed.\n *\n * @private\n */\nconst warnOnceHistory: {[key: string]: boolean} = {};\n\nexport function warnOnce(message: string): void {\n if (!warnOnceHistory[message]) {\n // console isn't defined in some WebWorkers, see #2558\n if (typeof console !== \"undefined\") console.warn(message);\n warnOnceHistory[message] = true;\n }\n}\n\n/**\n * Indicates if the provided Points are in a counter clockwise (true) or clockwise (false) order\n *\n * @private\n * @returns true for a counter clockwise set of points\n */\n// http://bryceboe.com/2006/10/23/line-segment-intersection-algorithm/\nexport function isCounterClockwise(a: Point, b: Point, c: Point): boolean {\n return (c.y - a.y) * (b.x - a.x) > (b.y - a.y) * (c.x - a.x);\n}\n\n/**\n * Returns the signed area for the polygon ring. Postive areas are exterior rings and\n * have a clockwise winding. Negative areas are interior rings and have a counter clockwise\n * ordering.\n *\n * @private\n * @param ring Exterior or interior ring\n */\nexport function calculateSignedArea(ring: Array): number {\n let sum = 0;\n for (let i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {\n p1 = ring[i];\n p2 = ring[j];\n sum += (p2.x - p1.x) * (p1.y + p2.y);\n }\n return sum;\n}\n\n/* global self, WorkerGlobalScope */\n/**\n * Returns true if run in the web-worker context.\n *\n * @private\n * @returns {boolean}\n */\nexport function isWorker(): boolean {\n return typeof WorkerGlobalScope !== 'undefined' && typeof self !== 'undefined' &&\n self instanceof WorkerGlobalScope;\n}\n\n/**\n * Parses data from 'Cache-Control' headers.\n *\n * @private\n * @param cacheControl Value of 'Cache-Control' header\n * @return object containing parsed header info.\n */\n\nexport function parseCacheControl(cacheControl: string): Object {\n // Taken from [Wreck](https://github.com/hapijs/wreck)\n const re = /(?:^|(?:\\s*\\,\\s*))([^\\x00-\\x20\\(\\)<>@\\,;\\:\\\\\"\\/\\[\\]\\?\\=\\{\\}\\x7F]+)(?:\\=(?:([^\\x00-\\x20\\(\\)<>@\\,;\\:\\\\\"\\/\\[\\]\\?\\=\\{\\}\\x7F]+)|(?:\\\"((?:[^\"\\\\]|\\\\.)*)\\\")))?/g;\n\n const header = {};\n cacheControl.replace(re, ($0, $1, $2, $3) => {\n const value = $2 || $3;\n header[$1] = value ? value.toLowerCase() : true;\n return '';\n });\n\n if (header['max-age']) {\n const maxAge = parseInt(header['max-age'], 10);\n if (isNaN(maxAge)) delete header['max-age'];\n else header['max-age'] = maxAge;\n }\n\n return header;\n}\n\nlet _isSafari = null;\n\nexport function _resetSafariCheckForTest() {\n _isSafari = null;\n}\n\n/**\n * Returns true when run in WebKit derived browsers.\n * This is used as a workaround for a memory leak in Safari caused by using Transferable objects to\n * transfer data between WebWorkers and the main thread.\n * https://github.com/mapbox/mapbox-gl-js/issues/8771\n *\n * This should be removed once the underlying Safari issue is fixed.\n *\n * @private\n * @param scope {WindowOrWorkerGlobalScope} Since this function is used both on the main thread and WebWorker context,\n * let the calling scope pass in the global scope object.\n * @returns {boolean}\n */\nexport function isSafari(scope: any): boolean {\n if (_isSafari == null) {\n const userAgent = scope.navigator ? scope.navigator.userAgent : null;\n _isSafari = !!scope.safari ||\n !!(userAgent && (/\\b(iPad|iPhone|iPod)\\b/.test(userAgent) || (!!userAgent.match('Safari') && !userAgent.match('Chrome'))));\n }\n return _isSafari;\n}\n\nexport function isSafariWithAntialiasingBug(scope: any): ?boolean {\n const userAgent = scope.navigator ? scope.navigator.userAgent : null;\n if (!isSafari(scope)) return false;\n // 15.4 is known to be buggy.\n // 15.5 may or may not include the fix. Mark it as buggy to be on the safe side.\n return userAgent && (userAgent.match('Version/15.4') || userAgent.match('Version/15.5') || userAgent.match(/CPU (OS|iPhone OS) (15_4|15_5) like Mac OS X/));\n}\n\nexport function isFullscreen(): boolean {\n return !!window.document.fullscreenElement || !!window.document.webkitFullscreenElement;\n}\n\nexport function storageAvailable(type: string): boolean {\n try {\n const storage = window[type];\n storage.setItem('_mapbox_test_', 1);\n storage.removeItem('_mapbox_test_');\n return true;\n } catch (e) {\n return false;\n }\n}\n\n// The following methods are from https://developer.mozilla.org/en-US/docs/Web/API/WindowBase64/Base64_encoding_and_decoding#The_Unicode_Problem\n//Unicode compliant base64 encoder for strings\nexport function b64EncodeUnicode(str: string): string {\n return window.btoa(\n encodeURIComponent(str).replace(/%([0-9A-F]{2})/g,\n (match, p1) => {\n return String.fromCharCode(Number('0x' + p1)); //eslint-disable-line\n }\n )\n );\n}\n\n// Unicode compliant decoder for base64-encoded strings\nexport function b64DecodeUnicode(str: string): string {\n return decodeURIComponent(window.atob(str).split('').map((c) => {\n return '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2); //eslint-disable-line\n }).join(''));\n}\n\nexport function getColumn(matrix: Mat4, col: number): Vec4 {\n return [matrix[col * 4], matrix[col * 4 + 1], matrix[col * 4 + 2], matrix[col * 4 + 3]];\n}\n\nexport function setColumn(matrix: Mat4, col: number, values: Vec4) {\n matrix[col * 4 + 0] = values[0];\n matrix[col * 4 + 1] = values[1];\n matrix[col * 4 + 2] = values[2];\n matrix[col * 4 + 3] = values[3];\n}\n","// @flow\n\nimport {warnOnce, parseCacheControl} from './util.js';\nimport window from './window.js';\n\nimport type Dispatcher from './dispatcher.js';\n\nconst CACHE_NAME = 'mapbox-tiles';\nlet cacheLimit = 500; // 50MB / (100KB/tile) ~= 500 tiles\nlet cacheCheckThreshold = 50;\n\nconst MIN_TIME_UNTIL_EXPIRY = 1000 * 60 * 7; // 7 minutes. Skip caching tiles with a short enough max age.\n\nexport type ResponseOptions = {\n status: number,\n statusText: string,\n headers: Headers\n};\n\n// We're using a global shared cache object. Normally, requesting ad-hoc Cache objects is fine, but\n// Safari has a memory leak in which it fails to release memory when requesting keys() from a Cache\n// object. See https://bugs.webkit.org/show_bug.cgi?id=203991 for more information.\nlet sharedCache: ?Promise;\n\nfunction getCaches() {\n try {\n return window.caches;\n } catch (e) {\n //