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Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }\r\n function fulfill(value) { resume(\"next\", value); }\r\n function reject(value) { resume(\"throw\", value); }\r\n function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }\r\n}\r\n\r\nexport function __asyncDelegator(o) {\r\n var i, p;\r\n return i = {}, verb(\"next\"), verb(\"throw\", function (e) { throw e; }), verb(\"return\"), i[Symbol.iterator] = function () { return this; }, i;\r\n function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: n === \"return\" } : f ? f(v) : v; } : f; }\r\n}\r\n\r\nexport function __asyncValues(o) {\r\n if (!Symbol.asyncIterator) throw new TypeError(\"Symbol.asyncIterator is not defined.\");\r\n var m = o[Symbol.asyncIterator], i;\r\n return m ? m.call(o) : (o = typeof __values === \"function\" ? __values(o) : o[Symbol.iterator](), i = {}, verb(\"next\"), verb(\"throw\"), verb(\"return\"), i[Symbol.asyncIterator] = function () { return this; }, i);\r\n function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }\r\n function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }\r\n}\r\n\r\nexport function __makeTemplateObject(cooked, raw) {\r\n if (Object.defineProperty) { Object.defineProperty(cooked, \"raw\", { value: raw }); } else { cooked.raw = raw; }\r\n return cooked;\r\n};\r\n\r\nexport function __importStar(mod) {\r\n if (mod && mod.__esModule) return mod;\r\n var result = {};\r\n if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];\r\n result.default = mod;\r\n return result;\r\n}\r\n\r\nexport function __importDefault(mod) {\r\n return (mod && mod.__esModule) ? mod : { default: mod };\r\n}\r\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/**\n * A container for all of the Logger instances\n */\nexport const instances: Logger[] = [];\n\n/**\n * The JS SDK supports 5 log levels and also allows a user the ability to\n * silence the logs altogether.\n *\n * The order is a follows:\n * DEBUG < VERBOSE < INFO < WARN < ERROR\n *\n * All of the log types above the current log level will be captured (i.e. if\n * you set the log level to `INFO`, errors will still be logged, but `DEBUG` and\n * `VERBOSE` logs will not)\n */\nexport enum LogLevel {\n DEBUG,\n VERBOSE,\n INFO,\n WARN,\n ERROR,\n SILENT\n}\n\n/**\n * The default log level\n */\nconst defaultLogLevel: LogLevel = LogLevel.INFO;\n\n/**\n * We allow users the ability to pass their own log handler. We will pass the\n * type of log, the current log level, and any other arguments passed (i.e. the\n * messages that the user wants to log) to this function.\n */\nexport type LogHandler = (\n loggerInstance: Logger,\n logType: LogLevel,\n ...args: unknown[]\n) => void;\n\n/**\n * The default log handler will forward DEBUG, VERBOSE, INFO, WARN, and ERROR\n * messages on to their corresponding console counterparts (if the log method\n * is supported by the current log level)\n */\nconst defaultLogHandler: LogHandler = (instance, logType, ...args): void => {\n if (logType < instance.logLevel) {\n return;\n }\n const now = new Date().toISOString();\n switch (logType) {\n /**\n * By default, `console.debug` is not displayed in the developer console (in\n * chrome). To avoid forcing users to have to opt-in to these logs twice\n * (i.e. once for firebase, and once in the console), we are sending `DEBUG`\n * logs to the `console.log` function.\n */\n case LogLevel.DEBUG:\n console.log(`[${now}] ${instance.name}:`, ...args);\n break;\n case LogLevel.VERBOSE:\n console.log(`[${now}] ${instance.name}:`, ...args);\n break;\n case LogLevel.INFO:\n console.info(`[${now}] ${instance.name}:`, ...args);\n break;\n case LogLevel.WARN:\n console.warn(`[${now}] ${instance.name}:`, ...args);\n break;\n case LogLevel.ERROR:\n console.error(`[${now}] ${instance.name}:`, ...args);\n break;\n default:\n throw new Error(\n `Attempted to log a message with an invalid logType (value: ${logType})`\n );\n }\n};\n\nexport class Logger {\n /**\n * Gives you an instance of a Logger to capture messages according to\n * Firebase's logging scheme.\n *\n * @param name The name that the logs will be associated with\n */\n constructor(public name: string) {\n /**\n * Capture the current instance for later use\n */\n instances.push(this);\n }\n\n /**\n * The log level of the given Logger instance.\n */\n private _logLevel = defaultLogLevel;\n get logLevel(): LogLevel {\n return this._logLevel;\n }\n set logLevel(val: LogLevel) {\n if (!(val in LogLevel)) {\n throw new TypeError('Invalid value assigned to `logLevel`');\n }\n this._logLevel = val;\n }\n\n /**\n * The log handler for the Logger instance.\n */\n private _logHandler: LogHandler = defaultLogHandler;\n get logHandler(): LogHandler {\n return this._logHandler;\n }\n set logHandler(val: LogHandler) {\n if (typeof val !== 'function') {\n throw new TypeError('Value assigned to `logHandler` must be a function');\n }\n this._logHandler = val;\n }\n\n /**\n * The functions below are all based on the `console` interface\n */\n\n debug(...args: unknown[]): void {\n this._logHandler(this, LogLevel.DEBUG, ...args);\n }\n log(...args: unknown[]): void {\n this._logHandler(this, LogLevel.VERBOSE, ...args);\n }\n info(...args: unknown[]): void {\n this._logHandler(this, LogLevel.INFO, ...args);\n }\n warn(...args: unknown[]): void {\n this._logHandler(this, LogLevel.WARN, ...args);\n }\n error(...args: unknown[]): void {\n this._logHandler(this, LogLevel.ERROR, ...args);\n }\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CONSTANTS } from './constants';\n\n/**\n * Returns navigator.userAgent string or '' if it's not defined.\n * @return user agent string\n */\nexport function getUA(): string {\n if (\n typeof navigator !== 'undefined' &&\n typeof navigator['userAgent'] === 'string'\n ) {\n return navigator['userAgent'];\n } else {\n return '';\n }\n}\n\n/**\n * Detect Cordova / PhoneGap / Ionic frameworks on a mobile device.\n *\n * Deliberately does not rely on checking `file://` URLs (as this fails PhoneGap\n * in the Ripple emulator) nor Cordova `onDeviceReady`, which would normally\n * wait for a callback.\n */\nexport function isMobileCordova(): boolean {\n return (\n typeof window !== 'undefined' &&\n // @ts-ignore Setting up an broadly applicable index signature for Window\n // just to deal with this case would probably be a bad idea.\n !!(window['cordova'] || window['phonegap'] || window['PhoneGap']) &&\n /ios|iphone|ipod|ipad|android|blackberry|iemobile/i.test(getUA())\n );\n}\n\n/**\n * Detect Node.js.\n *\n * @return true if Node.js environment is detected.\n */\n// Node detection logic from: https://github.com/iliakan/detect-node/\nexport function isNode(): boolean {\n try {\n return (\n Object.prototype.toString.call(global.process) === '[object process]'\n );\n } catch (e) {\n return false;\n }\n}\n\n/**\n * Detect Browser Environment\n */\nexport function isBrowser(): boolean {\n return typeof self === 'object' && self.self === self;\n}\n\n/**\n * Detect browser extensions (Chrome and Firefox at least).\n */\ninterface BrowserRuntime {\n id?: unknown;\n}\ndeclare const chrome: { runtime?: BrowserRuntime };\ndeclare const browser: { runtime?: BrowserRuntime };\nexport function isBrowserExtension(): boolean {\n const runtime =\n typeof chrome === 'object'\n ? chrome.runtime\n : typeof browser === 'object'\n ? browser.runtime\n : undefined;\n return typeof runtime === 'object' && runtime.id !== undefined;\n}\n\n/**\n * Detect React Native.\n *\n * @return true if ReactNative environment is detected.\n */\nexport function isReactNative(): boolean {\n return (\n typeof navigator === 'object' && navigator['product'] === 'ReactNative'\n );\n}\n\n/** Detects Electron apps. */\nexport function isElectron(): boolean {\n return getUA().indexOf('Electron/') >= 0;\n}\n\n/** Detects Internet Explorer. */\nexport function isIE(): boolean {\n const ua = getUA();\n return ua.indexOf('MSIE ') >= 0 || ua.indexOf('Trident/') >= 0;\n}\n\n/** Detects Universal Windows Platform apps. */\nexport function isUWP(): boolean {\n return getUA().indexOf('MSAppHost/') >= 0;\n}\n\n/**\n * Detect whether the current SDK build is the Node version.\n *\n * @return true if it's the Node SDK build.\n */\nexport function isNodeSdk(): boolean {\n return CONSTANTS.NODE_CLIENT === true || CONSTANTS.NODE_ADMIN === true;\n}\n","/**\n * @license\n * Copyright 2017 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n/**\n * @fileoverview Standardized Firebase Error.\n *\n * Usage:\n *\n * // Typescript string literals for type-safe codes\n * type Err =\n * 'unknown' |\n * 'object-not-found'\n * ;\n *\n * // Closure enum for type-safe error codes\n * // at-enum {string}\n * var Err = {\n * UNKNOWN: 'unknown',\n * OBJECT_NOT_FOUND: 'object-not-found',\n * }\n *\n * let errors: Map = {\n * 'generic-error': \"Unknown error\",\n * 'file-not-found': \"Could not find file: {$file}\",\n * };\n *\n * // Type-safe function - must pass a valid error code as param.\n * let error = new ErrorFactory('service', 'Service', errors);\n *\n * ...\n * throw error.create(Err.GENERIC);\n * ...\n * throw error.create(Err.FILE_NOT_FOUND, {'file': fileName});\n * ...\n * // Service: Could not file file: foo.txt (service/file-not-found).\n *\n * catch (e) {\n * assert(e.message === \"Could not find file: foo.txt.\");\n * if (e.code === 'service/file-not-found') {\n * console.log(\"Could not read file: \" + e['file']);\n * }\n * }\n */\n\nexport type ErrorMap = {\n readonly [K in ErrorCode]: string;\n};\n\nconst ERROR_NAME = 'FirebaseError';\n\nexport interface StringLike {\n toString(): string;\n}\n\nexport interface ErrorData {\n [key: string]: StringLike | undefined;\n}\n\nexport interface FirebaseError extends Error, ErrorData {\n // Unique code for error - format is service/error-code-string.\n readonly code: string;\n\n // Developer-friendly error message.\n readonly message: string;\n\n // Always 'FirebaseError'.\n readonly name: typeof ERROR_NAME;\n\n // Where available - stack backtrace in a string.\n readonly stack?: string;\n}\n\n// Based on code from:\n// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error#Custom_Error_Types\nexport class FirebaseError extends Error {\n readonly name = ERROR_NAME;\n\n constructor(readonly code: string, message: string) {\n super(message);\n\n // Fix For ES5\n // https://github.com/Microsoft/TypeScript-wiki/blob/master/Breaking-Changes.md#extending-built-ins-like-error-array-and-map-may-no-longer-work\n Object.setPrototypeOf(this, FirebaseError.prototype);\n\n // Maintains proper stack trace for where our error was thrown.\n // Only available on V8.\n if (Error.captureStackTrace) {\n Error.captureStackTrace(this, ErrorFactory.prototype.create);\n }\n }\n}\n\nexport class ErrorFactory<\n ErrorCode extends string,\n ErrorParams extends { readonly [K in ErrorCode]?: ErrorData } = {}\n> {\n constructor(\n private readonly service: string,\n private readonly serviceName: string,\n private readonly errors: ErrorMap\n ) {}\n\n create(\n code: K,\n ...data: K extends keyof ErrorParams ? [ErrorParams[K]] : []\n ): FirebaseError {\n const customData = (data[0] as ErrorData) || {};\n const fullCode = `${this.service}/${code}`;\n const template = this.errors[code];\n\n const message = template ? replaceTemplate(template, customData) : 'Error';\n // Service Name: Error message (service/code).\n const fullMessage = `${this.serviceName}: ${message} (${fullCode}).`;\n\n const error = new FirebaseError(fullCode, fullMessage);\n\n // Keys with an underscore at the end of their name are not included in\n // error.data for some reason.\n // TODO: Replace with Object.entries when lib is updated to es2017.\n for (const key of Object.keys(customData)) {\n if (key.slice(-1) !== '_') {\n if (key in error) {\n console.warn(\n `Overwriting FirebaseError base field \"${key}\" can cause unexpected behavior.`\n );\n }\n error[key] = customData[key];\n }\n }\n\n return error;\n }\n}\n\nfunction replaceTemplate(template: string, data: ErrorData): string {\n return template.replace(PATTERN, (_, key) => {\n const value = data[key];\n return value != null ? value.toString() : `<${key}?>`;\n });\n}\n\nconst PATTERN = /\\{\\$([^}]+)}/g;\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\nimport {\n InstantiationMode,\n InstanceFactory,\n ComponentType,\n Dictionary,\n Name\n} from './types';\n\n/**\n * Component for service name T, e.g. `auth`, `auth-internal`\n */\nexport class Component {\n multipleInstances = false;\n /**\n * Properties to be added to the service namespace\n */\n serviceProps: Dictionary = {};\n\n instantiationMode = InstantiationMode.LAZY;\n\n /**\n *\n * @param name The public service name, e.g. app, auth, firestore, database\n * @param instanceFactory Service factory responsible for creating the public interface\n * @param type whether the service provided by the component is public or private\n */\n constructor(\n readonly name: T,\n readonly instanceFactory: InstanceFactory,\n readonly type: ComponentType\n ) {}\n\n setInstantiationMode(mode: InstantiationMode): this {\n this.instantiationMode = mode;\n return this;\n }\n\n setMultipleInstances(multipleInstances: boolean): this {\n this.multipleInstances = multipleInstances;\n return this;\n }\n\n setServiceProps(props: Dictionary): this {\n this.serviceProps = props;\n return this;\n }\n}\n","// Copyright 2006 The Closure Library Authors. All Rights Reserved.\r\n//\r\n// Licensed under the Apache License, Version 2.0 (the \"License\");\r\n// you may not use this file except in compliance with the License.\r\n// You may obtain a copy of the License at\r\n//\r\n// http://www.apache.org/licenses/LICENSE-2.0\r\n//\r\n// Unless required by applicable law or agreed to in writing, software\r\n// distributed under the License is distributed on an \"AS-IS\" BASIS,\r\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r\n// See the License for the specific language governing permissions and\r\n// limitations under the License.\r\n\r\n/**\r\n * @fileoverview Bootstrap for the Google JS Library (Closure).\r\n *\r\n * In uncompiled mode base.js will attempt to load Closure's deps file, unless\r\n * the global CLOSURE_NO_DEPS is set to true. This allows projects\r\n * to include their own deps file(s) from different locations.\r\n *\r\n * Avoid including base.js more than once. This is strictly discouraged and not\r\n * supported. goog.require(...) won't work properly in that case.\r\n *\r\n * @provideGoog\r\n */\r\n\r\n\r\n/**\r\n * @define {boolean} Overridden to true by the compiler.\r\n */\r\nvar COMPILED = false;\r\n\r\n\r\n/**\r\n * Base namespace for the Closure library. Checks to see goog is already\r\n * defined in the current scope before assigning to prevent clobbering if\r\n * base.js is loaded more than once.\r\n *\r\n * @const\r\n */\r\nvar goog = goog || {};\r\n\r\n/**\r\n * Reference to the global context. In most cases this will be 'window'.\r\n * @const\r\n * @suppress {newCheckTypes}\r\n */\r\ngoog.global = this;\r\n\r\n\r\n/**\r\n * A hook for overriding the define values in uncompiled mode.\r\n *\r\n * In uncompiled mode, `CLOSURE_UNCOMPILED_DEFINES` may be defined before\r\n * loading base.js. If a key is defined in `CLOSURE_UNCOMPILED_DEFINES`,\r\n * `goog.define` will use the value instead of the default value. This\r\n * allows flags to be overwritten without compilation (this is normally\r\n * accomplished with the compiler's \"define\" flag).\r\n *\r\n * Example:\r\n *
\r\n *   var CLOSURE_UNCOMPILED_DEFINES = {'goog.DEBUG': false};\r\n * 
\r\n *\r\n * @type {Object|undefined}\r\n */\r\ngoog.global.CLOSURE_UNCOMPILED_DEFINES;\r\n\r\n\r\n/**\r\n * A hook for overriding the define values in uncompiled or compiled mode,\r\n * like CLOSURE_UNCOMPILED_DEFINES but effective in compiled code. In\r\n * uncompiled code CLOSURE_UNCOMPILED_DEFINES takes precedence.\r\n *\r\n * Also unlike CLOSURE_UNCOMPILED_DEFINES the values must be number, boolean or\r\n * string literals or the compiler will emit an error.\r\n *\r\n * While any @define value may be set, only those set with goog.define will be\r\n * effective for uncompiled code.\r\n *\r\n * Example:\r\n *
\r\n *   var CLOSURE_DEFINES = {'goog.DEBUG': false} ;\r\n * 
\r\n *\r\n * @type {Object|undefined}\r\n */\r\ngoog.global.CLOSURE_DEFINES;\r\n\r\n\r\n/**\r\n * Returns true if the specified value is not undefined.\r\n *\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is defined.\r\n */\r\ngoog.isDef = function(val) {\r\n // void 0 always evaluates to undefined and hence we do not need to depend on\r\n // the definition of the global variable named 'undefined'.\r\n return val !== void 0;\r\n};\r\n\r\n/**\r\n * Returns true if the specified value is a string.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is a string.\r\n */\r\ngoog.isString = function(val) {\r\n return typeof val == 'string';\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the specified value is a boolean.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is boolean.\r\n */\r\ngoog.isBoolean = function(val) {\r\n return typeof val == 'boolean';\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the specified value is a number.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is a number.\r\n */\r\ngoog.isNumber = function(val) {\r\n return typeof val == 'number';\r\n};\r\n\r\n\r\n/**\r\n * Builds an object structure for the provided namespace path, ensuring that\r\n * names that already exist are not overwritten. For example:\r\n * \"a.b.c\" -> a = {};a.b={};a.b.c={};\r\n * Used by goog.provide and goog.exportSymbol.\r\n * @param {string} name name of the object that this file defines.\r\n * @param {*=} opt_object the object to expose at the end of the path.\r\n * @param {Object=} opt_objectToExportTo The object to add the path to; default\r\n * is `goog.global`.\r\n * @private\r\n */\r\ngoog.exportPath_ = function(name, opt_object, opt_objectToExportTo) {\r\n var parts = name.split('.');\r\n var cur = opt_objectToExportTo || goog.global;\r\n\r\n // Internet Explorer exhibits strange behavior when throwing errors from\r\n // methods externed in this manner. See the testExportSymbolExceptions in\r\n // base_test.html for an example.\r\n if (!(parts[0] in cur) && typeof cur.execScript != 'undefined') {\r\n cur.execScript('var ' + parts[0]);\r\n }\r\n\r\n for (var part; parts.length && (part = parts.shift());) {\r\n if (!parts.length && goog.isDef(opt_object)) {\r\n // last part and we have an object; use it\r\n cur[part] = opt_object;\r\n } else if (cur[part] && cur[part] !== Object.prototype[part]) {\r\n cur = cur[part];\r\n } else {\r\n cur = cur[part] = {};\r\n }\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Defines a named value. In uncompiled mode, the value is retrieved from\r\n * CLOSURE_DEFINES or CLOSURE_UNCOMPILED_DEFINES if the object is defined and\r\n * has the property specified, and otherwise used the defined defaultValue.\r\n * When compiled the default can be overridden using the compiler options or the\r\n * value set in the CLOSURE_DEFINES object. Returns the defined value so that it\r\n * can be used safely in modules. Note that the value type MUST be either\r\n * boolean, number, or string.\r\n *\r\n * @param {string} name The distinguished name to provide.\r\n * @param {T} defaultValue\r\n * @return {T} The defined value.\r\n * @template T\r\n */\r\ngoog.define = function(name, defaultValue) {\r\n var value = defaultValue;\r\n if (!COMPILED) {\r\n var uncompiledDefines = goog.global.CLOSURE_UNCOMPILED_DEFINES;\r\n var defines = goog.global.CLOSURE_DEFINES;\r\n if (uncompiledDefines &&\r\n // Anti DOM-clobbering runtime check (b/37736576).\r\n /** @type {?} */ (uncompiledDefines).nodeType === undefined &&\r\n Object.prototype.hasOwnProperty.call(uncompiledDefines, name)) {\r\n value = uncompiledDefines[name];\r\n } else if (\r\n defines &&\r\n // Anti DOM-clobbering runtime check (b/37736576).\r\n /** @type {?} */ (defines).nodeType === undefined &&\r\n Object.prototype.hasOwnProperty.call(defines, name)) {\r\n value = defines[name];\r\n }\r\n }\r\n goog.exportPath_(name, value);\r\n return value;\r\n};\r\n\r\n\r\n/**\r\n * @define {number} Integer year indicating the set of browser features that are\r\n * guaranteed to be present. This is defined to include exactly features that\r\n * work correctly on all \"modern\" browsers that are stable on January 1 of the\r\n * specified year. For example,\r\n * ```js\r\n * if (goog.FEATURESET_YEAR >= 2019) {\r\n * // use APIs known to be available on all major stable browsers Jan 1, 2019\r\n * } else {\r\n * // polyfill for older browsers\r\n * }\r\n * ```\r\n * This is intended to be the primary define for removing\r\n * unnecessary browser compatibility code (such as ponyfills and workarounds),\r\n * and should inform the default value for most other defines:\r\n * ```js\r\n * const ASSUME_NATIVE_PROMISE =\r\n * goog.define('ASSUME_NATIVE_PROMISE', goog.FEATURESET_YEAR >= 2016);\r\n * ```\r\n *\r\n * The default assumption is that IE9 is the lowest supported browser, which was\r\n * first available Jan 1, 2012.\r\n *\r\n * TODO(user): Reference more thorough documentation when it's available.\r\n */\r\ngoog.FEATURESET_YEAR = goog.define('goog.FEATURESET_YEAR', 2012);\r\n\r\n\r\n/**\r\n * @define {boolean} DEBUG is provided as a convenience so that debugging code\r\n * that should not be included in a production. It can be easily stripped\r\n * by specifying --define goog.DEBUG=false to the Closure Compiler aka\r\n * JSCompiler. For example, most toString() methods should be declared inside an\r\n * \"if (goog.DEBUG)\" conditional because they are generally used for debugging\r\n * purposes and it is difficult for the JSCompiler to statically determine\r\n * whether they are used.\r\n */\r\ngoog.DEBUG = goog.define('goog.DEBUG', true);\r\n\r\n\r\n/**\r\n * @define {string} LOCALE defines the locale being used for compilation. It is\r\n * used to select locale specific data to be compiled in js binary. BUILD rule\r\n * can specify this value by \"--define goog.LOCALE=\" as a compiler\r\n * option.\r\n *\r\n * Take into account that the locale code format is important. You should use\r\n * the canonical Unicode format with hyphen as a delimiter. Language must be\r\n * lowercase, Language Script - Capitalized, Region - UPPERCASE.\r\n * There are few examples: pt-BR, en, en-US, sr-Latin-BO, zh-Hans-CN.\r\n *\r\n * See more info about locale codes here:\r\n * http://www.unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers\r\n *\r\n * For language codes you should use values defined by ISO 693-1. See it here\r\n * http://www.w3.org/WAI/ER/IG/ert/iso639.htm. There is only one exception from\r\n * this rule: the Hebrew language. For legacy reasons the old code (iw) should\r\n * be used instead of the new code (he).\r\n *\r\n */\r\ngoog.LOCALE = goog.define('goog.LOCALE', 'en'); // default to en\r\n\r\n\r\n/**\r\n * @define {boolean} Whether this code is running on trusted sites.\r\n *\r\n * On untrusted sites, several native functions can be defined or overridden by\r\n * external libraries like Prototype, Datejs, and JQuery and setting this flag\r\n * to false forces closure to use its own implementations when possible.\r\n *\r\n * If your JavaScript can be loaded by a third party site and you are wary about\r\n * relying on non-standard implementations, specify\r\n * \"--define goog.TRUSTED_SITE=false\" to the compiler.\r\n */\r\ngoog.TRUSTED_SITE = goog.define('goog.TRUSTED_SITE', true);\r\n\r\n\r\n/**\r\n * @define {boolean} Whether a project is expected to be running in strict mode.\r\n *\r\n * This define can be used to trigger alternate implementations compatible with\r\n * running in EcmaScript Strict mode or warn about unavailable functionality.\r\n * @see https://goo.gl/PudQ4y\r\n *\r\n */\r\ngoog.STRICT_MODE_COMPATIBLE = goog.define('goog.STRICT_MODE_COMPATIBLE', false);\r\n\r\n\r\n/**\r\n * @define {boolean} Whether code that calls {@link goog.setTestOnly} should\r\n * be disallowed in the compilation unit.\r\n */\r\ngoog.DISALLOW_TEST_ONLY_CODE =\r\n goog.define('goog.DISALLOW_TEST_ONLY_CODE', COMPILED && !goog.DEBUG);\r\n\r\n\r\n/**\r\n * @define {boolean} Whether to use a Chrome app CSP-compliant method for\r\n * loading scripts via goog.require. @see appendScriptSrcNode_.\r\n */\r\ngoog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING =\r\n goog.define('goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING', false);\r\n\r\n\r\n/**\r\n * Defines a namespace in Closure.\r\n *\r\n * A namespace may only be defined once in a codebase. It may be defined using\r\n * goog.provide() or goog.module().\r\n *\r\n * The presence of one or more goog.provide() calls in a file indicates\r\n * that the file defines the given objects/namespaces.\r\n * Provided symbols must not be null or undefined.\r\n *\r\n * In addition, goog.provide() creates the object stubs for a namespace\r\n * (for example, goog.provide(\"goog.foo.bar\") will create the object\r\n * goog.foo.bar if it does not already exist).\r\n *\r\n * Build tools also scan for provide/require/module statements\r\n * to discern dependencies, build dependency files (see deps.js), etc.\r\n *\r\n * @see goog.require\r\n * @see goog.module\r\n * @param {string} name Namespace provided by this file in the form\r\n * \"goog.package.part\".\r\n */\r\ngoog.provide = function(name) {\r\n if (goog.isInModuleLoader_()) {\r\n throw new Error('goog.provide cannot be used within a module.');\r\n }\r\n if (!COMPILED) {\r\n // Ensure that the same namespace isn't provided twice.\r\n // A goog.module/goog.provide maps a goog.require to a specific file\r\n if (goog.isProvided_(name)) {\r\n throw new Error('Namespace \"' + name + '\" already declared.');\r\n }\r\n }\r\n\r\n goog.constructNamespace_(name);\r\n};\r\n\r\n\r\n/**\r\n * @param {string} name Namespace provided by this file in the form\r\n * \"goog.package.part\".\r\n * @param {Object=} opt_obj The object to embed in the namespace.\r\n * @private\r\n */\r\ngoog.constructNamespace_ = function(name, opt_obj) {\r\n if (!COMPILED) {\r\n delete goog.implicitNamespaces_[name];\r\n\r\n var namespace = name;\r\n while ((namespace = namespace.substring(0, namespace.lastIndexOf('.')))) {\r\n if (goog.getObjectByName(namespace)) {\r\n break;\r\n }\r\n goog.implicitNamespaces_[namespace] = true;\r\n }\r\n }\r\n\r\n goog.exportPath_(name, opt_obj);\r\n};\r\n\r\n\r\n/**\r\n * Returns CSP nonce, if set for any script tag.\r\n * @param {?Window=} opt_window The window context used to retrieve the nonce.\r\n * Defaults to global context.\r\n * @return {string} CSP nonce or empty string if no nonce is present.\r\n */\r\ngoog.getScriptNonce = function(opt_window) {\r\n if (opt_window && opt_window != goog.global) {\r\n return goog.getScriptNonce_(opt_window.document);\r\n }\r\n if (goog.cspNonce_ === null) {\r\n goog.cspNonce_ = goog.getScriptNonce_(goog.global.document);\r\n }\r\n return goog.cspNonce_;\r\n};\r\n\r\n\r\n/**\r\n * According to the CSP3 spec a nonce must be a valid base64 string.\r\n * @see https://www.w3.org/TR/CSP3/#grammardef-base64-value\r\n * @private @const\r\n */\r\ngoog.NONCE_PATTERN_ = /^[\\w+/_-]+[=]{0,2}$/;\r\n\r\n\r\n/**\r\n * @private {?string}\r\n */\r\ngoog.cspNonce_ = null;\r\n\r\n\r\n/**\r\n * Returns CSP nonce, if set for any script tag.\r\n * @param {!Document} doc\r\n * @return {string} CSP nonce or empty string if no nonce is present.\r\n * @private\r\n */\r\ngoog.getScriptNonce_ = function(doc) {\r\n var script = doc.querySelector && doc.querySelector('script[nonce]');\r\n if (script) {\r\n // Try to get the nonce from the IDL property first, because browsers that\r\n // implement additional nonce protection features (currently only Chrome) to\r\n // prevent nonce stealing via CSS do not expose the nonce via attributes.\r\n // See https://github.com/whatwg/html/issues/2369\r\n var nonce = script['nonce'] || script.getAttribute('nonce');\r\n if (nonce && goog.NONCE_PATTERN_.test(nonce)) {\r\n return nonce;\r\n }\r\n }\r\n return '';\r\n};\r\n\r\n\r\n/**\r\n * Module identifier validation regexp.\r\n * Note: This is a conservative check, it is very possible to be more lenient,\r\n * the primary exclusion here is \"/\" and \"\\\" and a leading \".\", these\r\n * restrictions are intended to leave the door open for using goog.require\r\n * with relative file paths rather than module identifiers.\r\n * @private\r\n */\r\ngoog.VALID_MODULE_RE_ = /^[a-zA-Z_$][a-zA-Z0-9._$]*$/;\r\n\r\n\r\n/**\r\n * Defines a module in Closure.\r\n *\r\n * Marks that this file must be loaded as a module and claims the namespace.\r\n *\r\n * A namespace may only be defined once in a codebase. It may be defined using\r\n * goog.provide() or goog.module().\r\n *\r\n * goog.module() has three requirements:\r\n * - goog.module may not be used in the same file as goog.provide.\r\n * - goog.module must be the first statement in the file.\r\n * - only one goog.module is allowed per file.\r\n *\r\n * When a goog.module annotated file is loaded, it is enclosed in\r\n * a strict function closure. This means that:\r\n * - any variables declared in a goog.module file are private to the file\r\n * (not global), though the compiler is expected to inline the module.\r\n * - The code must obey all the rules of \"strict\" JavaScript.\r\n * - the file will be marked as \"use strict\"\r\n *\r\n * NOTE: unlike goog.provide, goog.module does not declare any symbols by\r\n * itself. If declared symbols are desired, use\r\n * goog.module.declareLegacyNamespace().\r\n *\r\n *\r\n * See the public goog.module proposal: http://goo.gl/Va1hin\r\n *\r\n * @param {string} name Namespace provided by this file in the form\r\n * \"goog.package.part\", is expected but not required.\r\n * @return {void}\r\n */\r\ngoog.module = function(name) {\r\n if (!goog.isString(name) || !name ||\r\n name.search(goog.VALID_MODULE_RE_) == -1) {\r\n throw new Error('Invalid module identifier');\r\n }\r\n if (!goog.isInGoogModuleLoader_()) {\r\n throw new Error(\r\n 'Module ' + name + ' has been loaded incorrectly. Note, ' +\r\n 'modules cannot be loaded as normal scripts. They require some kind of ' +\r\n 'pre-processing step. You\\'re likely trying to load a module via a ' +\r\n 'script tag or as a part of a concatenated bundle without rewriting the ' +\r\n 'module. For more info see: ' +\r\n 'https://github.com/google/closure-library/wiki/goog.module:-an-ES6-module-like-alternative-to-goog.provide.');\r\n }\r\n if (goog.moduleLoaderState_.moduleName) {\r\n throw new Error('goog.module may only be called once per module.');\r\n }\r\n\r\n // Store the module name for the loader.\r\n goog.moduleLoaderState_.moduleName = name;\r\n if (!COMPILED) {\r\n // Ensure that the same namespace isn't provided twice.\r\n // A goog.module/goog.provide maps a goog.require to a specific file\r\n if (goog.isProvided_(name)) {\r\n throw new Error('Namespace \"' + name + '\" already declared.');\r\n }\r\n delete goog.implicitNamespaces_[name];\r\n }\r\n};\r\n\r\n\r\n/**\r\n * @param {string} name The module identifier.\r\n * @return {?} The module exports for an already loaded module or null.\r\n *\r\n * Note: This is not an alternative to goog.require, it does not\r\n * indicate a hard dependency, instead it is used to indicate\r\n * an optional dependency or to access the exports of a module\r\n * that has already been loaded.\r\n * @suppress {missingProvide}\r\n */\r\ngoog.module.get = function(name) {\r\n\r\n return goog.module.getInternal_(name);\r\n};\r\n\r\n\r\n/**\r\n * @param {string} name The module identifier.\r\n * @return {?} The module exports for an already loaded module or null.\r\n * @private\r\n */\r\ngoog.module.getInternal_ = function(name) {\r\n if (!COMPILED) {\r\n if (name in goog.loadedModules_) {\r\n return goog.loadedModules_[name].exports;\r\n } else if (!goog.implicitNamespaces_[name]) {\r\n var ns = goog.getObjectByName(name);\r\n return ns != null ? ns : null;\r\n }\r\n }\r\n return null;\r\n};\r\n\r\n\r\n/**\r\n * Types of modules the debug loader can load.\r\n * @enum {string}\r\n */\r\ngoog.ModuleType = {\r\n ES6: 'es6',\r\n GOOG: 'goog'\r\n};\r\n\r\n\r\n/**\r\n * @private {?{\r\n * moduleName: (string|undefined),\r\n * declareLegacyNamespace:boolean,\r\n * type: ?goog.ModuleType\r\n * }}\r\n */\r\ngoog.moduleLoaderState_ = null;\r\n\r\n\r\n/**\r\n * @private\r\n * @return {boolean} Whether a goog.module or an es6 module is currently being\r\n * initialized.\r\n */\r\ngoog.isInModuleLoader_ = function() {\r\n return goog.isInGoogModuleLoader_() || goog.isInEs6ModuleLoader_();\r\n};\r\n\r\n\r\n/**\r\n * @private\r\n * @return {boolean} Whether a goog.module is currently being initialized.\r\n */\r\ngoog.isInGoogModuleLoader_ = function() {\r\n return !!goog.moduleLoaderState_ &&\r\n goog.moduleLoaderState_.type == goog.ModuleType.GOOG;\r\n};\r\n\r\n\r\n/**\r\n * @private\r\n * @return {boolean} Whether an es6 module is currently being initialized.\r\n */\r\ngoog.isInEs6ModuleLoader_ = function() {\r\n var inLoader = !!goog.moduleLoaderState_ &&\r\n goog.moduleLoaderState_.type == goog.ModuleType.ES6;\r\n\r\n if (inLoader) {\r\n return true;\r\n }\r\n\r\n var jscomp = goog.global['$jscomp'];\r\n\r\n if (jscomp) {\r\n // jscomp may not have getCurrentModulePath if this is a compiled bundle\r\n // that has some of the runtime, but not all of it. This can happen if\r\n // optimizations are turned on so the unused runtime is removed but renaming\r\n // and Closure pass are off (so $jscomp is still named $jscomp and the\r\n // goog.provide/require calls still exist).\r\n if (typeof jscomp.getCurrentModulePath != 'function') {\r\n return false;\r\n }\r\n\r\n // Bundled ES6 module.\r\n return !!jscomp.getCurrentModulePath();\r\n }\r\n\r\n return false;\r\n};\r\n\r\n\r\n/**\r\n * Provide the module's exports as a globally accessible object under the\r\n * module's declared name. This is intended to ease migration to goog.module\r\n * for files that have existing usages.\r\n * @suppress {missingProvide}\r\n */\r\ngoog.module.declareLegacyNamespace = function() {\r\n if (!COMPILED && !goog.isInGoogModuleLoader_()) {\r\n throw new Error(\r\n 'goog.module.declareLegacyNamespace must be called from ' +\r\n 'within a goog.module');\r\n }\r\n if (!COMPILED && !goog.moduleLoaderState_.moduleName) {\r\n throw new Error(\r\n 'goog.module must be called prior to ' +\r\n 'goog.module.declareLegacyNamespace.');\r\n }\r\n goog.moduleLoaderState_.declareLegacyNamespace = true;\r\n};\r\n\r\n\r\n/**\r\n * Associates an ES6 module with a Closure module ID so that is available via\r\n * goog.require. The associated ID acts like a goog.module ID - it does not\r\n * create any global names, it is merely available via goog.require /\r\n * goog.module.get / goog.forwardDeclare / goog.requireType. goog.require and\r\n * goog.module.get will return the entire module as if it was import *'d. This\r\n * allows Closure files to reference ES6 modules for the sake of migration.\r\n *\r\n * @param {string} namespace\r\n * @suppress {missingProvide}\r\n */\r\ngoog.declareModuleId = function(namespace) {\r\n if (!COMPILED) {\r\n if (!goog.isInEs6ModuleLoader_()) {\r\n throw new Error(\r\n 'goog.declareModuleId may only be called from ' +\r\n 'within an ES6 module');\r\n }\r\n if (goog.moduleLoaderState_ && goog.moduleLoaderState_.moduleName) {\r\n throw new Error(\r\n 'goog.declareModuleId may only be called once per module.');\r\n }\r\n if (namespace in goog.loadedModules_) {\r\n throw new Error(\r\n 'Module with namespace \"' + namespace + '\" already exists.');\r\n }\r\n }\r\n if (goog.moduleLoaderState_) {\r\n // Not bundled - debug loading.\r\n goog.moduleLoaderState_.moduleName = namespace;\r\n } else {\r\n // Bundled - not debug loading, no module loader state.\r\n var jscomp = goog.global['$jscomp'];\r\n if (!jscomp || typeof jscomp.getCurrentModulePath != 'function') {\r\n throw new Error(\r\n 'Module with namespace \"' + namespace +\r\n '\" has been loaded incorrectly.');\r\n }\r\n var exports = jscomp.require(jscomp.getCurrentModulePath());\r\n goog.loadedModules_[namespace] = {\r\n exports: exports,\r\n type: goog.ModuleType.ES6,\r\n moduleId: namespace\r\n };\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Marks that the current file should only be used for testing, and never for\r\n * live code in production.\r\n *\r\n * In the case of unit tests, the message may optionally be an exact namespace\r\n * for the test (e.g. 'goog.stringTest'). The linter will then ignore the extra\r\n * provide (if not explicitly defined in the code).\r\n *\r\n * @param {string=} opt_message Optional message to add to the error that's\r\n * raised when used in production code.\r\n */\r\ngoog.setTestOnly = function(opt_message) {\r\n if (goog.DISALLOW_TEST_ONLY_CODE) {\r\n opt_message = opt_message || '';\r\n throw new Error(\r\n 'Importing test-only code into non-debug environment' +\r\n (opt_message ? ': ' + opt_message : '.'));\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Forward declares a symbol. This is an indication to the compiler that the\r\n * symbol may be used in the source yet is not required and may not be provided\r\n * in compilation.\r\n *\r\n * The most common usage of forward declaration is code that takes a type as a\r\n * function parameter but does not need to require it. By forward declaring\r\n * instead of requiring, no hard dependency is made, and (if not required\r\n * elsewhere) the namespace may never be required and thus, not be pulled\r\n * into the JavaScript binary. If it is required elsewhere, it will be type\r\n * checked as normal.\r\n *\r\n * Before using goog.forwardDeclare, please read the documentation at\r\n * https://github.com/google/closure-compiler/wiki/Bad-Type-Annotation to\r\n * understand the options and tradeoffs when working with forward declarations.\r\n *\r\n * @param {string} name The namespace to forward declare in the form of\r\n * \"goog.package.part\".\r\n */\r\ngoog.forwardDeclare = function(name) {};\r\n\r\n\r\n/**\r\n * Forward declare type information. Used to assign types to goog.global\r\n * referenced object that would otherwise result in unknown type references\r\n * and thus block property disambiguation.\r\n */\r\ngoog.forwardDeclare('Document');\r\ngoog.forwardDeclare('HTMLScriptElement');\r\ngoog.forwardDeclare('XMLHttpRequest');\r\n\r\n\r\nif (!COMPILED) {\r\n /**\r\n * Check if the given name has been goog.provided. This will return false for\r\n * names that are available only as implicit namespaces.\r\n * @param {string} name name of the object to look for.\r\n * @return {boolean} Whether the name has been provided.\r\n * @private\r\n */\r\n goog.isProvided_ = function(name) {\r\n return (name in goog.loadedModules_) ||\r\n (!goog.implicitNamespaces_[name] &&\r\n goog.isDefAndNotNull(goog.getObjectByName(name)));\r\n };\r\n\r\n /**\r\n * Namespaces implicitly defined by goog.provide. For example,\r\n * goog.provide('goog.events.Event') implicitly declares that 'goog' and\r\n * 'goog.events' must be namespaces.\r\n *\r\n * @type {!Object}\r\n * @private\r\n */\r\n goog.implicitNamespaces_ = {'goog.module': true};\r\n\r\n // NOTE: We add goog.module as an implicit namespace as goog.module is defined\r\n // here and because the existing module package has not been moved yet out of\r\n // the goog.module namespace. This satisifies both the debug loader and\r\n // ahead-of-time dependency management.\r\n}\r\n\r\n\r\n/**\r\n * Returns an object based on its fully qualified external name. The object\r\n * is not found if null or undefined. If you are using a compilation pass that\r\n * renames property names beware that using this function will not find renamed\r\n * properties.\r\n *\r\n * @param {string} name The fully qualified name.\r\n * @param {Object=} opt_obj The object within which to look; default is\r\n * |goog.global|.\r\n * @return {?} The value (object or primitive) or, if not found, null.\r\n */\r\ngoog.getObjectByName = function(name, opt_obj) {\r\n var parts = name.split('.');\r\n var cur = opt_obj || goog.global;\r\n for (var i = 0; i < parts.length; i++) {\r\n cur = cur[parts[i]];\r\n if (!goog.isDefAndNotNull(cur)) {\r\n return null;\r\n }\r\n }\r\n return cur;\r\n};\r\n\r\n\r\n/**\r\n * Globalizes a whole namespace, such as goog or goog.lang.\r\n *\r\n * @param {!Object} obj The namespace to globalize.\r\n * @param {Object=} opt_global The object to add the properties to.\r\n * @deprecated Properties may be explicitly exported to the global scope, but\r\n * this should no longer be done in bulk.\r\n */\r\ngoog.globalize = function(obj, opt_global) {\r\n var global = opt_global || goog.global;\r\n for (var x in obj) {\r\n global[x] = obj[x];\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Adds a dependency from a file to the files it requires.\r\n * @param {string} relPath The path to the js file.\r\n * @param {!Array} provides An array of strings with\r\n * the names of the objects this file provides.\r\n * @param {!Array} requires An array of strings with\r\n * the names of the objects this file requires.\r\n * @param {boolean|!Object=} opt_loadFlags Parameters indicating\r\n * how the file must be loaded. The boolean 'true' is equivalent\r\n * to {'module': 'goog'} for backwards-compatibility. Valid properties\r\n * and values include {'module': 'goog'} and {'lang': 'es6'}.\r\n */\r\ngoog.addDependency = function(relPath, provides, requires, opt_loadFlags) {\r\n if (!COMPILED && goog.DEPENDENCIES_ENABLED) {\r\n goog.debugLoader_.addDependency(relPath, provides, requires, opt_loadFlags);\r\n }\r\n};\r\n\r\n\r\n\r\n\r\n// NOTE(nnaze): The debug DOM loader was included in base.js as an original way\r\n// to do \"debug-mode\" development. The dependency system can sometimes be\r\n// confusing, as can the debug DOM loader's asynchronous nature.\r\n//\r\n// With the DOM loader, a call to goog.require() is not blocking -- the script\r\n// will not load until some point after the current script. If a namespace is\r\n// needed at runtime, it needs to be defined in a previous script, or loaded via\r\n// require() with its registered dependencies.\r\n//\r\n// User-defined namespaces may need their own deps file. For a reference on\r\n// creating a deps file, see:\r\n// Externally: https://developers.google.com/closure/library/docs/depswriter\r\n//\r\n// Because of legacy clients, the DOM loader can't be easily removed from\r\n// base.js. Work was done to make it disableable or replaceable for\r\n// different environments (DOM-less JavaScript interpreters like Rhino or V8,\r\n// for example). See bootstrap/ for more information.\r\n\r\n\r\n/**\r\n * @define {boolean} Whether to enable the debug loader.\r\n *\r\n * If enabled, a call to goog.require() will attempt to load the namespace by\r\n * appending a script tag to the DOM (if the namespace has been registered).\r\n *\r\n * If disabled, goog.require() will simply assert that the namespace has been\r\n * provided (and depend on the fact that some outside tool correctly ordered\r\n * the script).\r\n */\r\ngoog.ENABLE_DEBUG_LOADER = goog.define('goog.ENABLE_DEBUG_LOADER', true);\r\n\r\n\r\n/**\r\n * @param {string} msg\r\n * @private\r\n */\r\ngoog.logToConsole_ = function(msg) {\r\n if (goog.global.console) {\r\n goog.global.console['error'](msg);\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Implements a system for the dynamic resolution of dependencies that works in\r\n * parallel with the BUILD system.\r\n *\r\n * Note that all calls to goog.require will be stripped by the compiler.\r\n *\r\n * @see goog.provide\r\n * @param {string} namespace Namespace (as was given in goog.provide,\r\n * goog.module, or goog.declareModuleId) in the form\r\n * \"goog.package.part\".\r\n * @return {?} If called within a goog.module or ES6 module file, the associated\r\n * namespace or module otherwise null.\r\n */\r\ngoog.require = function(namespace) {\r\n if (!COMPILED) {\r\n // Might need to lazy load on old IE.\r\n if (goog.ENABLE_DEBUG_LOADER) {\r\n goog.debugLoader_.requested(namespace);\r\n }\r\n\r\n // If the object already exists we do not need to do anything.\r\n if (goog.isProvided_(namespace)) {\r\n if (goog.isInModuleLoader_()) {\r\n return goog.module.getInternal_(namespace);\r\n }\r\n } else if (goog.ENABLE_DEBUG_LOADER) {\r\n var moduleLoaderState = goog.moduleLoaderState_;\r\n goog.moduleLoaderState_ = null;\r\n try {\r\n goog.debugLoader_.load_(namespace);\r\n } finally {\r\n goog.moduleLoaderState_ = moduleLoaderState;\r\n }\r\n }\r\n\r\n return null;\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Requires a symbol for its type information. This is an indication to the\r\n * compiler that the symbol may appear in type annotations, yet it is not\r\n * referenced at runtime.\r\n *\r\n * When called within a goog.module or ES6 module file, the return value may be\r\n * assigned to or destructured into a variable, but it may not be otherwise used\r\n * in code outside of a type annotation.\r\n *\r\n * Note that all calls to goog.requireType will be stripped by the compiler.\r\n *\r\n * @param {string} namespace Namespace (as was given in goog.provide,\r\n * goog.module, or goog.declareModuleId) in the form\r\n * \"goog.package.part\".\r\n * @return {?}\r\n */\r\ngoog.requireType = function(namespace) {\r\n // Return an empty object so that single-level destructuring of the return\r\n // value doesn't crash at runtime when using the debug loader. Multi-level\r\n // destructuring isn't supported.\r\n return {};\r\n};\r\n\r\n\r\n/**\r\n * Path for included scripts.\r\n * @type {string}\r\n */\r\ngoog.basePath = '';\r\n\r\n\r\n/**\r\n * A hook for overriding the base path.\r\n * @type {string|undefined}\r\n */\r\ngoog.global.CLOSURE_BASE_PATH;\r\n\r\n\r\n/**\r\n * Whether to attempt to load Closure's deps file. By default, when uncompiled,\r\n * deps files will attempt to be loaded.\r\n * @type {boolean|undefined}\r\n */\r\ngoog.global.CLOSURE_NO_DEPS;\r\n\r\n\r\n/**\r\n * A function to import a single script. This is meant to be overridden when\r\n * Closure is being run in non-HTML contexts, such as web workers. It's defined\r\n * in the global scope so that it can be set before base.js is loaded, which\r\n * allows deps.js to be imported properly.\r\n *\r\n * The first parameter the script source, which is a relative URI. The second,\r\n * optional parameter is the script contents, in the event the script needed\r\n * transformation. It should return true if the script was imported, false\r\n * otherwise.\r\n * @type {(function(string, string=): boolean)|undefined}\r\n */\r\ngoog.global.CLOSURE_IMPORT_SCRIPT;\r\n\r\n\r\n/**\r\n * Null function used for default values of callbacks, etc.\r\n * @return {void} Nothing.\r\n */\r\ngoog.nullFunction = function() {};\r\n\r\n\r\n/**\r\n * When defining a class Foo with an abstract method bar(), you can do:\r\n * Foo.prototype.bar = goog.abstractMethod\r\n *\r\n * Now if a subclass of Foo fails to override bar(), an error will be thrown\r\n * when bar() is invoked.\r\n *\r\n * @type {!Function}\r\n * @throws {Error} when invoked to indicate the method should be overridden.\r\n */\r\ngoog.abstractMethod = function() {\r\n throw new Error('unimplemented abstract method');\r\n};\r\n\r\n\r\n/**\r\n * Adds a `getInstance` static method that always returns the same\r\n * instance object.\r\n * @param {!Function} ctor The constructor for the class to add the static\r\n * method to.\r\n * @suppress {missingProperties} 'instance_' isn't a property on 'Function'\r\n * but we don't have a better type to use here.\r\n */\r\ngoog.addSingletonGetter = function(ctor) {\r\n // instance_ is immediately set to prevent issues with sealed constructors\r\n // such as are encountered when a constructor is returned as the export object\r\n // of a goog.module in unoptimized code.\r\n // Delcare type to avoid conformance violations that ctor.instance_ is unknown\r\n /** @type {undefined|!Object} @suppress {underscore} */\r\n ctor.instance_ = undefined;\r\n ctor.getInstance = function() {\r\n if (ctor.instance_) {\r\n return ctor.instance_;\r\n }\r\n if (goog.DEBUG) {\r\n // NOTE: JSCompiler can't optimize away Array#push.\r\n goog.instantiatedSingletons_[goog.instantiatedSingletons_.length] = ctor;\r\n }\r\n // Cast to avoid conformance violations that ctor.instance_ is unknown\r\n return /** @type {!Object|undefined} */ (ctor.instance_) = new ctor;\r\n };\r\n};\r\n\r\n\r\n/**\r\n * All singleton classes that have been instantiated, for testing. Don't read\r\n * it directly, use the `goog.testing.singleton` module. The compiler\r\n * removes this variable if unused.\r\n * @type {!Array}\r\n * @private\r\n */\r\ngoog.instantiatedSingletons_ = [];\r\n\r\n\r\n/**\r\n * @define {boolean} Whether to load goog.modules using `eval` when using\r\n * the debug loader. This provides a better debugging experience as the\r\n * source is unmodified and can be edited using Chrome Workspaces or similar.\r\n * However in some environments the use of `eval` is banned\r\n * so we provide an alternative.\r\n */\r\ngoog.LOAD_MODULE_USING_EVAL = goog.define('goog.LOAD_MODULE_USING_EVAL', true);\r\n\r\n\r\n/**\r\n * @define {boolean} Whether the exports of goog.modules should be sealed when\r\n * possible.\r\n */\r\ngoog.SEAL_MODULE_EXPORTS = goog.define('goog.SEAL_MODULE_EXPORTS', goog.DEBUG);\r\n\r\n\r\n/**\r\n * The registry of initialized modules:\r\n * The module identifier or path to module exports map.\r\n * @private @const {!Object}\r\n */\r\ngoog.loadedModules_ = {};\r\n\r\n\r\n/**\r\n * True if the debug loader enabled and used.\r\n * @const {boolean}\r\n */\r\ngoog.DEPENDENCIES_ENABLED = !COMPILED && goog.ENABLE_DEBUG_LOADER;\r\n\r\n\r\n/**\r\n * @define {string} How to decide whether to transpile. Valid values\r\n * are 'always', 'never', and 'detect'. The default ('detect') is to\r\n * use feature detection to determine which language levels need\r\n * transpilation.\r\n */\r\n// NOTE(sdh): we could expand this to accept a language level to bypass\r\n// detection: e.g. goog.TRANSPILE == 'es5' would transpile ES6 files but\r\n// would leave ES3 and ES5 files alone.\r\ngoog.TRANSPILE = goog.define('goog.TRANSPILE', 'detect');\r\n\r\n/**\r\n * @define {boolean} If true assume that ES modules have already been\r\n * transpiled by the jscompiler (in the same way that transpile.js would\r\n * transpile them - to jscomp modules). Useful only for servers that wish to use\r\n * the debug loader and transpile server side. Thus this is only respected if\r\n * goog.TRANSPILE is \"never\".\r\n */\r\ngoog.ASSUME_ES_MODULES_TRANSPILED =\r\n goog.define('goog.ASSUME_ES_MODULES_TRANSPILED', false);\r\n\r\n\r\n/**\r\n * @define {string} If a file needs to be transpiled what the output language\r\n * should be. By default this is the highest language level this file detects\r\n * the current environment supports. Generally this flag should not be set, but\r\n * it could be useful to override. Example: If the current environment supports\r\n * ES6 then by default ES7+ files will be transpiled to ES6, unless this is\r\n * overridden.\r\n *\r\n * Valid values include: es3, es5, es6, es7, and es8. Anything not recognized\r\n * is treated as es3.\r\n *\r\n * Note that setting this value does not force transpilation. Just if\r\n * transpilation occurs this will be the output. So this is most useful when\r\n * goog.TRANSPILE is set to 'always' and then forcing the language level to be\r\n * something lower than what the environment detects.\r\n */\r\ngoog.TRANSPILE_TO_LANGUAGE = goog.define('goog.TRANSPILE_TO_LANGUAGE', '');\r\n\r\n\r\n/**\r\n * @define {string} Path to the transpiler. Executing the script at this\r\n * path (relative to base.js) should define a function $jscomp.transpile.\r\n */\r\ngoog.TRANSPILER = goog.define('goog.TRANSPILER', 'transpile.js');\r\n\r\n\r\n/**\r\n * @package {?boolean}\r\n * Visible for testing.\r\n */\r\ngoog.hasBadLetScoping = null;\r\n\r\n\r\n/**\r\n * @return {boolean}\r\n * @package Visible for testing.\r\n */\r\ngoog.useSafari10Workaround = function() {\r\n if (goog.hasBadLetScoping == null) {\r\n var hasBadLetScoping;\r\n try {\r\n hasBadLetScoping = !eval(\r\n '\"use strict\";' +\r\n 'let x = 1; function f() { return typeof x; };' +\r\n 'f() == \"number\";');\r\n } catch (e) {\r\n // Assume that ES6 syntax isn't supported.\r\n hasBadLetScoping = false;\r\n }\r\n goog.hasBadLetScoping = hasBadLetScoping;\r\n }\r\n return goog.hasBadLetScoping;\r\n};\r\n\r\n\r\n/**\r\n * @param {string} moduleDef\r\n * @return {string}\r\n * @package Visible for testing.\r\n */\r\ngoog.workaroundSafari10EvalBug = function(moduleDef) {\r\n return '(function(){' + moduleDef +\r\n '\\n' + // Terminate any trailing single line comment.\r\n ';' + // Terminate any trailing expression.\r\n '})();\\n';\r\n};\r\n\r\n\r\n/**\r\n * @param {function(?):?|string} moduleDef The module definition.\r\n */\r\ngoog.loadModule = function(moduleDef) {\r\n // NOTE: we allow function definitions to be either in the from\r\n // of a string to eval (which keeps the original source intact) or\r\n // in a eval forbidden environment (CSP) we allow a function definition\r\n // which in its body must call `goog.module`, and return the exports\r\n // of the module.\r\n var previousState = goog.moduleLoaderState_;\r\n try {\r\n goog.moduleLoaderState_ = {\r\n moduleName: '',\r\n declareLegacyNamespace: false,\r\n type: goog.ModuleType.GOOG\r\n };\r\n var exports;\r\n if (goog.isFunction(moduleDef)) {\r\n exports = moduleDef.call(undefined, {});\r\n } else if (goog.isString(moduleDef)) {\r\n if (goog.useSafari10Workaround()) {\r\n moduleDef = goog.workaroundSafari10EvalBug(moduleDef);\r\n }\r\n\r\n exports = goog.loadModuleFromSource_.call(undefined, moduleDef);\r\n } else {\r\n throw new Error('Invalid module definition');\r\n }\r\n\r\n var moduleName = goog.moduleLoaderState_.moduleName;\r\n if (goog.isString(moduleName) && moduleName) {\r\n // Don't seal legacy namespaces as they may be used as a parent of\r\n // another namespace\r\n if (goog.moduleLoaderState_.declareLegacyNamespace) {\r\n goog.constructNamespace_(moduleName, exports);\r\n } else if (\r\n goog.SEAL_MODULE_EXPORTS && Object.seal &&\r\n typeof exports == 'object' && exports != null) {\r\n Object.seal(exports);\r\n }\r\n\r\n var data = {\r\n exports: exports,\r\n type: goog.ModuleType.GOOG,\r\n moduleId: goog.moduleLoaderState_.moduleName\r\n };\r\n goog.loadedModules_[moduleName] = data;\r\n } else {\r\n throw new Error('Invalid module name \\\"' + moduleName + '\\\"');\r\n }\r\n } finally {\r\n goog.moduleLoaderState_ = previousState;\r\n }\r\n};\r\n\r\n\r\n/**\r\n * @private @const\r\n */\r\ngoog.loadModuleFromSource_ = /** @type {function(string):?} */ (function() {\r\n // NOTE: we avoid declaring parameters or local variables here to avoid\r\n // masking globals or leaking values into the module definition.\r\n 'use strict';\r\n var exports = {};\r\n eval(arguments[0]);\r\n return exports;\r\n});\r\n\r\n\r\n/**\r\n * Normalize a file path by removing redundant \"..\" and extraneous \".\" file\r\n * path components.\r\n * @param {string} path\r\n * @return {string}\r\n * @private\r\n */\r\ngoog.normalizePath_ = function(path) {\r\n var components = path.split('/');\r\n var i = 0;\r\n while (i < components.length) {\r\n if (components[i] == '.') {\r\n components.splice(i, 1);\r\n } else if (\r\n i && components[i] == '..' && components[i - 1] &&\r\n components[i - 1] != '..') {\r\n components.splice(--i, 2);\r\n } else {\r\n i++;\r\n }\r\n }\r\n return components.join('/');\r\n};\r\n\r\n\r\n/**\r\n * Provides a hook for loading a file when using Closure's goog.require() API\r\n * with goog.modules. In particular this hook is provided to support Node.js.\r\n *\r\n * @type {(function(string):string)|undefined}\r\n */\r\ngoog.global.CLOSURE_LOAD_FILE_SYNC;\r\n\r\n\r\n/**\r\n * Loads file by synchronous XHR. Should not be used in production environments.\r\n * @param {string} src Source URL.\r\n * @return {?string} File contents, or null if load failed.\r\n * @private\r\n */\r\ngoog.loadFileSync_ = function(src) {\r\n if (goog.global.CLOSURE_LOAD_FILE_SYNC) {\r\n return goog.global.CLOSURE_LOAD_FILE_SYNC(src);\r\n } else {\r\n try {\r\n /** @type {XMLHttpRequest} */\r\n var xhr = new goog.global['XMLHttpRequest']();\r\n xhr.open('get', src, false);\r\n xhr.send();\r\n // NOTE: Successful http: requests have a status of 200, but successful\r\n // file: requests may have a status of zero. Any other status, or a\r\n // thrown exception (particularly in case of file: requests) indicates\r\n // some sort of error, which we treat as a missing or unavailable file.\r\n return xhr.status == 0 || xhr.status == 200 ? xhr.responseText : null;\r\n } catch (err) {\r\n // No need to rethrow or log, since errors should show up on their own.\r\n return null;\r\n }\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Lazily retrieves the transpiler and applies it to the source.\r\n * @param {string} code JS code.\r\n * @param {string} path Path to the code.\r\n * @param {string} target Language level output.\r\n * @return {string} The transpiled code.\r\n * @private\r\n */\r\ngoog.transpile_ = function(code, path, target) {\r\n var jscomp = goog.global['$jscomp'];\r\n if (!jscomp) {\r\n goog.global['$jscomp'] = jscomp = {};\r\n }\r\n var transpile = jscomp.transpile;\r\n if (!transpile) {\r\n var transpilerPath = goog.basePath + goog.TRANSPILER;\r\n var transpilerCode = goog.loadFileSync_(transpilerPath);\r\n if (transpilerCode) {\r\n // This must be executed synchronously, since by the time we know we\r\n // need it, we're about to load and write the ES6 code synchronously,\r\n // so a normal script-tag load will be too slow. Wrapped in a function\r\n // so that code is eval'd in the global scope.\r\n (function() {\r\n eval(transpilerCode + '\\n//# sourceURL=' + transpilerPath);\r\n }).call(goog.global);\r\n // Even though the transpiler is optional, if $gwtExport is found, it's\r\n // a sign the transpiler was loaded and the $jscomp.transpile *should*\r\n // be there.\r\n if (goog.global['$gwtExport'] && goog.global['$gwtExport']['$jscomp'] &&\r\n !goog.global['$gwtExport']['$jscomp']['transpile']) {\r\n throw new Error(\r\n 'The transpiler did not properly export the \"transpile\" ' +\r\n 'method. $gwtExport: ' + JSON.stringify(goog.global['$gwtExport']));\r\n }\r\n // transpile.js only exports a single $jscomp function, transpile. We\r\n // grab just that and add it to the existing definition of $jscomp which\r\n // contains the polyfills.\r\n goog.global['$jscomp'].transpile =\r\n goog.global['$gwtExport']['$jscomp']['transpile'];\r\n jscomp = goog.global['$jscomp'];\r\n transpile = jscomp.transpile;\r\n }\r\n }\r\n if (!transpile) {\r\n // The transpiler is an optional component. If it's not available then\r\n // replace it with a pass-through function that simply logs.\r\n var suffix = ' requires transpilation but no transpiler was found.';\r\n transpile = jscomp.transpile = function(code, path) {\r\n // TODO(sdh): figure out some way to get this error to show up\r\n // in test results, noting that the failure may occur in many\r\n // different ways, including in loadModule() before the test\r\n // runner even comes up.\r\n goog.logToConsole_(path + suffix);\r\n return code;\r\n };\r\n }\r\n // Note: any transpilation errors/warnings will be logged to the console.\r\n return transpile(code, path, target);\r\n};\r\n\r\n//==============================================================================\r\n// Language Enhancements\r\n//==============================================================================\r\n\r\n\r\n/**\r\n * This is a \"fixed\" version of the typeof operator. It differs from the typeof\r\n * operator in such a way that null returns 'null' and arrays return 'array'.\r\n * @param {?} value The value to get the type of.\r\n * @return {string} The name of the type.\r\n */\r\ngoog.typeOf = function(value) {\r\n var s = typeof value;\r\n if (s == 'object') {\r\n if (value) {\r\n // Check these first, so we can avoid calling Object.prototype.toString if\r\n // possible.\r\n //\r\n // IE improperly marshals typeof across execution contexts, but a\r\n // cross-context object will still return false for \"instanceof Object\".\r\n if (value instanceof Array) {\r\n return 'array';\r\n } else if (value instanceof Object) {\r\n return s;\r\n }\r\n\r\n // HACK: In order to use an Object prototype method on the arbitrary\r\n // value, the compiler requires the value be cast to type Object,\r\n // even though the ECMA spec explicitly allows it.\r\n var className = Object.prototype.toString.call(\r\n /** @type {!Object} */ (value));\r\n // In Firefox 3.6, attempting to access iframe window objects' length\r\n // property throws an NS_ERROR_FAILURE, so we need to special-case it\r\n // here.\r\n if (className == '[object Window]') {\r\n return 'object';\r\n }\r\n\r\n // We cannot always use constructor == Array or instanceof Array because\r\n // different frames have different Array objects. In IE6, if the iframe\r\n // where the array was created is destroyed, the array loses its\r\n // prototype. Then dereferencing val.splice here throws an exception, so\r\n // we can't use goog.isFunction. Calling typeof directly returns 'unknown'\r\n // so that will work. In this case, this function will return false and\r\n // most array functions will still work because the array is still\r\n // array-like (supports length and []) even though it has lost its\r\n // prototype.\r\n // Mark Miller noticed that Object.prototype.toString\r\n // allows access to the unforgeable [[Class]] property.\r\n // 15.2.4.2 Object.prototype.toString ( )\r\n // When the toString method is called, the following steps are taken:\r\n // 1. Get the [[Class]] property of this object.\r\n // 2. Compute a string value by concatenating the three strings\r\n // \"[object \", Result(1), and \"]\".\r\n // 3. Return Result(2).\r\n // and this behavior survives the destruction of the execution context.\r\n if ((className == '[object Array]' ||\r\n // In IE all non value types are wrapped as objects across window\r\n // boundaries (not iframe though) so we have to do object detection\r\n // for this edge case.\r\n typeof value.length == 'number' &&\r\n typeof value.splice != 'undefined' &&\r\n typeof value.propertyIsEnumerable != 'undefined' &&\r\n !value.propertyIsEnumerable('splice')\r\n\r\n )) {\r\n return 'array';\r\n }\r\n // HACK: There is still an array case that fails.\r\n // function ArrayImpostor() {}\r\n // ArrayImpostor.prototype = [];\r\n // var impostor = new ArrayImpostor;\r\n // this can be fixed by getting rid of the fast path\r\n // (value instanceof Array) and solely relying on\r\n // (value && Object.prototype.toString.vall(value) === '[object Array]')\r\n // but that would require many more function calls and is not warranted\r\n // unless closure code is receiving objects from untrusted sources.\r\n\r\n // IE in cross-window calls does not correctly marshal the function type\r\n // (it appears just as an object) so we cannot use just typeof val ==\r\n // 'function'. However, if the object has a call property, it is a\r\n // function.\r\n if ((className == '[object Function]' ||\r\n typeof value.call != 'undefined' &&\r\n typeof value.propertyIsEnumerable != 'undefined' &&\r\n !value.propertyIsEnumerable('call'))) {\r\n return 'function';\r\n }\r\n\r\n } else {\r\n return 'null';\r\n }\r\n\r\n } else if (s == 'function' && typeof value.call == 'undefined') {\r\n // In Safari typeof nodeList returns 'function', and on Firefox typeof\r\n // behaves similarly for HTML{Applet,Embed,Object}, Elements and RegExps. We\r\n // would like to return object for those and we can detect an invalid\r\n // function by making sure that the function object has a call method.\r\n return 'object';\r\n }\r\n return s;\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the specified value is null.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is null.\r\n */\r\ngoog.isNull = function(val) {\r\n return val === null;\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the specified value is defined and not null.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is defined and not null.\r\n */\r\ngoog.isDefAndNotNull = function(val) {\r\n // Note that undefined == null.\r\n return val != null;\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the specified value is an array.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is an array.\r\n */\r\ngoog.isArray = function(val) {\r\n return goog.typeOf(val) == 'array';\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the object looks like an array. To qualify as array like\r\n * the value needs to be either a NodeList or an object with a Number length\r\n * property. Note that for this function neither strings nor functions are\r\n * considered \"array-like\".\r\n *\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is an array.\r\n */\r\ngoog.isArrayLike = function(val) {\r\n var type = goog.typeOf(val);\r\n // We do not use goog.isObject here in order to exclude function values.\r\n return type == 'array' || type == 'object' && typeof val.length == 'number';\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the object looks like a Date. To qualify as Date-like the\r\n * value needs to be an object and have a getFullYear() function.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is a like a Date.\r\n */\r\ngoog.isDateLike = function(val) {\r\n return goog.isObject(val) && typeof val.getFullYear == 'function';\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the specified value is a function.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is a function.\r\n */\r\ngoog.isFunction = function(val) {\r\n return goog.typeOf(val) == 'function';\r\n};\r\n\r\n\r\n/**\r\n * Returns true if the specified value is an object. This includes arrays and\r\n * functions.\r\n * @param {?} val Variable to test.\r\n * @return {boolean} Whether variable is an object.\r\n */\r\ngoog.isObject = function(val) {\r\n var type = typeof val;\r\n return type == 'object' && val != null || type == 'function';\r\n // return Object(val) === val also works, but is slower, especially if val is\r\n // not an object.\r\n};\r\n\r\n\r\n/**\r\n * Gets a unique ID for an object. This mutates the object so that further calls\r\n * with the same object as a parameter returns the same value. The unique ID is\r\n * guaranteed to be unique across the current session amongst objects that are\r\n * passed into `getUid`. There is no guarantee that the ID is unique or\r\n * consistent across sessions. It is unsafe to generate unique ID for function\r\n * prototypes.\r\n *\r\n * @param {Object} obj The object to get the unique ID for.\r\n * @return {number} The unique ID for the object.\r\n */\r\ngoog.getUid = function(obj) {\r\n // TODO(arv): Make the type stricter, do not accept null.\r\n\r\n // In Opera window.hasOwnProperty exists but always returns false so we avoid\r\n // using it. As a consequence the unique ID generated for BaseClass.prototype\r\n // and SubClass.prototype will be the same.\r\n return obj[goog.UID_PROPERTY_] ||\r\n (obj[goog.UID_PROPERTY_] = ++goog.uidCounter_);\r\n};\r\n\r\n\r\n/**\r\n * Whether the given object is already assigned a unique ID.\r\n *\r\n * This does not modify the object.\r\n *\r\n * @param {!Object} obj The object to check.\r\n * @return {boolean} Whether there is an assigned unique id for the object.\r\n */\r\ngoog.hasUid = function(obj) {\r\n return !!obj[goog.UID_PROPERTY_];\r\n};\r\n\r\n\r\n/**\r\n * Removes the unique ID from an object. This is useful if the object was\r\n * previously mutated using `goog.getUid` in which case the mutation is\r\n * undone.\r\n * @param {Object} obj The object to remove the unique ID field from.\r\n */\r\ngoog.removeUid = function(obj) {\r\n // TODO(arv): Make the type stricter, do not accept null.\r\n\r\n // In IE, DOM nodes are not instances of Object and throw an exception if we\r\n // try to delete. Instead we try to use removeAttribute.\r\n if (obj !== null && 'removeAttribute' in obj) {\r\n obj.removeAttribute(goog.UID_PROPERTY_);\r\n }\r\n\r\n try {\r\n delete obj[goog.UID_PROPERTY_];\r\n } catch (ex) {\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Name for unique ID property. Initialized in a way to help avoid collisions\r\n * with other closure JavaScript on the same page.\r\n * @type {string}\r\n * @private\r\n */\r\ngoog.UID_PROPERTY_ = 'closure_uid_' + ((Math.random() * 1e9) >>> 0);\r\n\r\n\r\n/**\r\n * Counter for UID.\r\n * @type {number}\r\n * @private\r\n */\r\ngoog.uidCounter_ = 0;\r\n\r\n\r\n/**\r\n * Adds a hash code field to an object. The hash code is unique for the\r\n * given object.\r\n * @param {Object} obj The object to get the hash code for.\r\n * @return {number} The hash code for the object.\r\n * @deprecated Use goog.getUid instead.\r\n */\r\ngoog.getHashCode = goog.getUid;\r\n\r\n\r\n/**\r\n * Removes the hash code field from an object.\r\n * @param {Object} obj The object to remove the field from.\r\n * @deprecated Use goog.removeUid instead.\r\n */\r\ngoog.removeHashCode = goog.removeUid;\r\n\r\n\r\n/**\r\n * Clones a value. The input may be an Object, Array, or basic type. Objects and\r\n * arrays will be cloned recursively.\r\n *\r\n * WARNINGS:\r\n * goog.cloneObject does not detect reference loops. Objects that\r\n * refer to themselves will cause infinite recursion.\r\n *\r\n * goog.cloneObject is unaware of unique identifiers, and copies\r\n * UIDs created by getUid into cloned results.\r\n *\r\n * @param {*} obj The value to clone.\r\n * @return {*} A clone of the input value.\r\n * @deprecated goog.cloneObject is unsafe. Prefer the goog.object methods.\r\n */\r\ngoog.cloneObject = function(obj) {\r\n var type = goog.typeOf(obj);\r\n if (type == 'object' || type == 'array') {\r\n if (typeof obj.clone === 'function') {\r\n return obj.clone();\r\n }\r\n var clone = type == 'array' ? [] : {};\r\n for (var key in obj) {\r\n clone[key] = goog.cloneObject(obj[key]);\r\n }\r\n return clone;\r\n }\r\n\r\n return obj;\r\n};\r\n\r\n\r\n/**\r\n * A native implementation of goog.bind.\r\n * @param {?function(this:T, ...)} fn A function to partially apply.\r\n * @param {T} selfObj Specifies the object which this should point to when the\r\n * function is run.\r\n * @param {...*} var_args Additional arguments that are partially applied to the\r\n * function.\r\n * @return {!Function} A partially-applied form of the function goog.bind() was\r\n * invoked as a method of.\r\n * @template T\r\n * @private\r\n */\r\ngoog.bindNative_ = function(fn, selfObj, var_args) {\r\n return /** @type {!Function} */ (fn.call.apply(fn.bind, arguments));\r\n};\r\n\r\n\r\n/**\r\n * A pure-JS implementation of goog.bind.\r\n * @param {?function(this:T, ...)} fn A function to partially apply.\r\n * @param {T} selfObj Specifies the object which this should point to when the\r\n * function is run.\r\n * @param {...*} var_args Additional arguments that are partially applied to the\r\n * function.\r\n * @return {!Function} A partially-applied form of the function goog.bind() was\r\n * invoked as a method of.\r\n * @template T\r\n * @private\r\n */\r\ngoog.bindJs_ = function(fn, selfObj, var_args) {\r\n if (!fn) {\r\n throw new Error();\r\n }\r\n\r\n if (arguments.length > 2) {\r\n var boundArgs = Array.prototype.slice.call(arguments, 2);\r\n return function() {\r\n // Prepend the bound arguments to the current arguments.\r\n var newArgs = Array.prototype.slice.call(arguments);\r\n Array.prototype.unshift.apply(newArgs, boundArgs);\r\n return fn.apply(selfObj, newArgs);\r\n };\r\n\r\n } else {\r\n return function() {\r\n return fn.apply(selfObj, arguments);\r\n };\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Partially applies this function to a particular 'this object' and zero or\r\n * more arguments. The result is a new function with some arguments of the first\r\n * function pre-filled and the value of this 'pre-specified'.\r\n *\r\n * Remaining arguments specified at call-time are appended to the pre-specified\r\n * ones.\r\n *\r\n * Also see: {@link #partial}.\r\n *\r\n * Usage:\r\n *
var barMethBound = goog.bind(myFunction, myObj, 'arg1', 'arg2');\r\n * barMethBound('arg3', 'arg4');
\r\n *\r\n * @param {?function(this:T, ...)} fn A function to partially apply.\r\n * @param {T} selfObj Specifies the object which this should point to when the\r\n * function is run.\r\n * @param {...*} var_args Additional arguments that are partially applied to the\r\n * function.\r\n * @return {!Function} A partially-applied form of the function goog.bind() was\r\n * invoked as a method of.\r\n * @template T\r\n * @suppress {deprecated} See above.\r\n */\r\ngoog.bind = function(fn, selfObj, var_args) {\r\n // TODO(nicksantos): narrow the type signature.\r\n if (Function.prototype.bind &&\r\n // NOTE(nicksantos): Somebody pulled base.js into the default Chrome\r\n // extension environment. This means that for Chrome extensions, they get\r\n // the implementation of Function.prototype.bind that calls goog.bind\r\n // instead of the native one. Even worse, we don't want to introduce a\r\n // circular dependency between goog.bind and Function.prototype.bind, so\r\n // we have to hack this to make sure it works correctly.\r\n Function.prototype.bind.toString().indexOf('native code') != -1) {\r\n goog.bind = goog.bindNative_;\r\n } else {\r\n goog.bind = goog.bindJs_;\r\n }\r\n return goog.bind.apply(null, arguments);\r\n};\r\n\r\n\r\n/**\r\n * Like goog.bind(), except that a 'this object' is not required. Useful when\r\n * the target function is already bound.\r\n *\r\n * Usage:\r\n * var g = goog.partial(f, arg1, arg2);\r\n * g(arg3, arg4);\r\n *\r\n * @param {Function} fn A function to partially apply.\r\n * @param {...*} var_args Additional arguments that are partially applied to fn.\r\n * @return {!Function} A partially-applied form of the function goog.partial()\r\n * was invoked as a method of.\r\n */\r\ngoog.partial = function(fn, var_args) {\r\n var args = Array.prototype.slice.call(arguments, 1);\r\n return function() {\r\n // Clone the array (with slice()) and append additional arguments\r\n // to the existing arguments.\r\n var newArgs = args.slice();\r\n newArgs.push.apply(newArgs, arguments);\r\n return fn.apply(/** @type {?} */ (this), newArgs);\r\n };\r\n};\r\n\r\n\r\n/**\r\n * Copies all the members of a source object to a target object. This method\r\n * does not work on all browsers for all objects that contain keys such as\r\n * toString or hasOwnProperty. Use goog.object.extend for this purpose.\r\n * @param {Object} target Target.\r\n * @param {Object} source Source.\r\n */\r\ngoog.mixin = function(target, source) {\r\n for (var x in source) {\r\n target[x] = source[x];\r\n }\r\n\r\n // For IE7 or lower, the for-in-loop does not contain any properties that are\r\n // not enumerable on the prototype object (for example, isPrototypeOf from\r\n // Object.prototype) but also it will not include 'replace' on objects that\r\n // extend String and change 'replace' (not that it is common for anyone to\r\n // extend anything except Object).\r\n};\r\n\r\n\r\n/**\r\n * @return {number} An integer value representing the number of milliseconds\r\n * between midnight, January 1, 1970 and the current time.\r\n */\r\ngoog.now = (goog.TRUSTED_SITE && Date.now) || (function() {\r\n // Unary plus operator converts its operand to a number which in\r\n // the case of\r\n // a date is done by calling getTime().\r\n return +new Date();\r\n });\r\n\r\n\r\n/**\r\n * Evals JavaScript in the global scope. In IE this uses execScript, other\r\n * browsers use goog.global.eval. If goog.global.eval does not evaluate in the\r\n * global scope (for example, in Safari), appends a script tag instead.\r\n * Throws an exception if neither execScript or eval is defined.\r\n * @param {string} script JavaScript string.\r\n */\r\ngoog.globalEval = function(script) {\r\n if (goog.global.execScript) {\r\n goog.global.execScript(script, 'JavaScript');\r\n } else if (goog.global.eval) {\r\n // Test to see if eval works\r\n if (goog.evalWorksForGlobals_ == null) {\r\n try {\r\n goog.global.eval('var _evalTest_ = 1;');\r\n } catch (ignore) {\r\n }\r\n if (typeof goog.global['_evalTest_'] != 'undefined') {\r\n try {\r\n delete goog.global['_evalTest_'];\r\n } catch (ignore) {\r\n // Microsoft edge fails the deletion above in strict mode.\r\n }\r\n goog.evalWorksForGlobals_ = true;\r\n } else {\r\n goog.evalWorksForGlobals_ = false;\r\n }\r\n }\r\n\r\n if (goog.evalWorksForGlobals_) {\r\n goog.global.eval(script);\r\n } else {\r\n /** @type {!Document} */\r\n var doc = goog.global.document;\r\n var scriptElt =\r\n /** @type {!HTMLScriptElement} */ (doc.createElement('SCRIPT'));\r\n scriptElt.type = 'text/javascript';\r\n scriptElt.defer = false;\r\n // Note(user): can't use .innerHTML since \"t('')\" will fail and\r\n // .text doesn't work in Safari 2. Therefore we append a text node.\r\n scriptElt.appendChild(doc.createTextNode(script));\r\n doc.head.appendChild(scriptElt);\r\n doc.head.removeChild(scriptElt);\r\n }\r\n } else {\r\n throw new Error('goog.globalEval not available');\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Indicates whether or not we can call 'eval' directly to eval code in the\r\n * global scope. Set to a Boolean by the first call to goog.globalEval (which\r\n * empirically tests whether eval works for globals). @see goog.globalEval\r\n * @type {?boolean}\r\n * @private\r\n */\r\ngoog.evalWorksForGlobals_ = null;\r\n\r\n\r\n/**\r\n * Optional map of CSS class names to obfuscated names used with\r\n * goog.getCssName().\r\n * @private {!Object|undefined}\r\n * @see goog.setCssNameMapping\r\n */\r\ngoog.cssNameMapping_;\r\n\r\n\r\n/**\r\n * Optional obfuscation style for CSS class names. Should be set to either\r\n * 'BY_WHOLE' or 'BY_PART' if defined.\r\n * @type {string|undefined}\r\n * @private\r\n * @see goog.setCssNameMapping\r\n */\r\ngoog.cssNameMappingStyle_;\r\n\r\n\r\n\r\n/**\r\n * A hook for modifying the default behavior goog.getCssName. The function\r\n * if present, will receive the standard output of the goog.getCssName as\r\n * its input.\r\n *\r\n * @type {(function(string):string)|undefined}\r\n */\r\ngoog.global.CLOSURE_CSS_NAME_MAP_FN;\r\n\r\n\r\n/**\r\n * Handles strings that are intended to be used as CSS class names.\r\n *\r\n * This function works in tandem with @see goog.setCssNameMapping.\r\n *\r\n * Without any mapping set, the arguments are simple joined with a hyphen and\r\n * passed through unaltered.\r\n *\r\n * When there is a mapping, there are two possible styles in which these\r\n * mappings are used. In the BY_PART style, each part (i.e. in between hyphens)\r\n * of the passed in css name is rewritten according to the map. In the BY_WHOLE\r\n * style, the full css name is looked up in the map directly. If a rewrite is\r\n * not specified by the map, the compiler will output a warning.\r\n *\r\n * When the mapping is passed to the compiler, it will replace calls to\r\n * goog.getCssName with the strings from the mapping, e.g.\r\n * var x = goog.getCssName('foo');\r\n * var y = goog.getCssName(this.baseClass, 'active');\r\n * becomes:\r\n * var x = 'foo';\r\n * var y = this.baseClass + '-active';\r\n *\r\n * If one argument is passed it will be processed, if two are passed only the\r\n * modifier will be processed, as it is assumed the first argument was generated\r\n * as a result of calling goog.getCssName.\r\n *\r\n * @param {string} className The class name.\r\n * @param {string=} opt_modifier A modifier to be appended to the class name.\r\n * @return {string} The class name or the concatenation of the class name and\r\n * the modifier.\r\n */\r\ngoog.getCssName = function(className, opt_modifier) {\r\n // String() is used for compatibility with compiled soy where the passed\r\n // className can be non-string objects.\r\n if (String(className).charAt(0) == '.') {\r\n throw new Error(\r\n 'className passed in goog.getCssName must not start with \".\".' +\r\n ' You passed: ' + className);\r\n }\r\n\r\n var getMapping = function(cssName) {\r\n return goog.cssNameMapping_[cssName] || cssName;\r\n };\r\n\r\n var renameByParts = function(cssName) {\r\n // Remap all the parts individually.\r\n var parts = cssName.split('-');\r\n var mapped = [];\r\n for (var i = 0; i < parts.length; i++) {\r\n mapped.push(getMapping(parts[i]));\r\n }\r\n return mapped.join('-');\r\n };\r\n\r\n var rename;\r\n if (goog.cssNameMapping_) {\r\n rename =\r\n goog.cssNameMappingStyle_ == 'BY_WHOLE' ? getMapping : renameByParts;\r\n } else {\r\n rename = function(a) {\r\n return a;\r\n };\r\n }\r\n\r\n var result =\r\n opt_modifier ? className + '-' + rename(opt_modifier) : rename(className);\r\n\r\n // The special CLOSURE_CSS_NAME_MAP_FN allows users to specify further\r\n // processing of the class name.\r\n if (goog.global.CLOSURE_CSS_NAME_MAP_FN) {\r\n return goog.global.CLOSURE_CSS_NAME_MAP_FN(result);\r\n }\r\n\r\n return result;\r\n};\r\n\r\n\r\n/**\r\n * Sets the map to check when returning a value from goog.getCssName(). Example:\r\n *
\r\n * goog.setCssNameMapping({\r\n *   \"goog\": \"a\",\r\n *   \"disabled\": \"b\",\r\n * });\r\n *\r\n * var x = goog.getCssName('goog');\r\n * // The following evaluates to: \"a a-b\".\r\n * goog.getCssName('goog') + ' ' + goog.getCssName(x, 'disabled')\r\n * 
\r\n * When declared as a map of string literals to string literals, the JSCompiler\r\n * will replace all calls to goog.getCssName() using the supplied map if the\r\n * --process_closure_primitives flag is set.\r\n *\r\n * @param {!Object} mapping A map of strings to strings where keys are possible\r\n * arguments to goog.getCssName() and values are the corresponding values\r\n * that should be returned.\r\n * @param {string=} opt_style The style of css name mapping. There are two valid\r\n * options: 'BY_PART', and 'BY_WHOLE'.\r\n * @see goog.getCssName for a description.\r\n */\r\ngoog.setCssNameMapping = function(mapping, opt_style) {\r\n goog.cssNameMapping_ = mapping;\r\n goog.cssNameMappingStyle_ = opt_style;\r\n};\r\n\r\n\r\n/**\r\n * To use CSS renaming in compiled mode, one of the input files should have a\r\n * call to goog.setCssNameMapping() with an object literal that the JSCompiler\r\n * can extract and use to replace all calls to goog.getCssName(). In uncompiled\r\n * mode, JavaScript code should be loaded before this base.js file that declares\r\n * a global variable, CLOSURE_CSS_NAME_MAPPING, which is used below. This is\r\n * to ensure that the mapping is loaded before any calls to goog.getCssName()\r\n * are made in uncompiled mode.\r\n *\r\n * A hook for overriding the CSS name mapping.\r\n * @type {!Object|undefined}\r\n */\r\ngoog.global.CLOSURE_CSS_NAME_MAPPING;\r\n\r\n\r\nif (!COMPILED && goog.global.CLOSURE_CSS_NAME_MAPPING) {\r\n // This does not call goog.setCssNameMapping() because the JSCompiler\r\n // requires that goog.setCssNameMapping() be called with an object literal.\r\n goog.cssNameMapping_ = goog.global.CLOSURE_CSS_NAME_MAPPING;\r\n}\r\n\r\n\r\n/**\r\n * Gets a localized message.\r\n *\r\n * This function is a compiler primitive. If you give the compiler a localized\r\n * message bundle, it will replace the string at compile-time with a localized\r\n * version, and expand goog.getMsg call to a concatenated string.\r\n *\r\n * Messages must be initialized in the form:\r\n * \r\n * var MSG_NAME = goog.getMsg('Hello {$placeholder}', {'placeholder': 'world'});\r\n * \r\n *\r\n * This function produces a string which should be treated as plain text. Use\r\n * {@link goog.html.SafeHtmlFormatter} in conjunction with goog.getMsg to\r\n * produce SafeHtml.\r\n *\r\n * @param {string} str Translatable string, places holders in the form {$foo}.\r\n * @param {Object=} opt_values Maps place holder name to value.\r\n * @return {string} message with placeholders filled.\r\n */\r\ngoog.getMsg = function(str, opt_values) {\r\n if (opt_values) {\r\n str = str.replace(/\\{\\$([^}]+)}/g, function(match, key) {\r\n return (opt_values != null && key in opt_values) ? opt_values[key] :\r\n match;\r\n });\r\n }\r\n return str;\r\n};\r\n\r\n\r\n/**\r\n * Gets a localized message. If the message does not have a translation, gives a\r\n * fallback message.\r\n *\r\n * This is useful when introducing a new message that has not yet been\r\n * translated into all languages.\r\n *\r\n * This function is a compiler primitive. Must be used in the form:\r\n * var x = goog.getMsgWithFallback(MSG_A, MSG_B);\r\n * where MSG_A and MSG_B were initialized with goog.getMsg.\r\n *\r\n * @param {string} a The preferred message.\r\n * @param {string} b The fallback message.\r\n * @return {string} The best translated message.\r\n */\r\ngoog.getMsgWithFallback = function(a, b) {\r\n return a;\r\n};\r\n\r\n\r\n/**\r\n * Exposes an unobfuscated global namespace path for the given object.\r\n * Note that fields of the exported object *will* be obfuscated, unless they are\r\n * exported in turn via this function or goog.exportProperty.\r\n *\r\n * Also handy for making public items that are defined in anonymous closures.\r\n *\r\n * ex. goog.exportSymbol('public.path.Foo', Foo);\r\n *\r\n * ex. goog.exportSymbol('public.path.Foo.staticFunction', Foo.staticFunction);\r\n * public.path.Foo.staticFunction();\r\n *\r\n * ex. goog.exportSymbol('public.path.Foo.prototype.myMethod',\r\n * Foo.prototype.myMethod);\r\n * new public.path.Foo().myMethod();\r\n *\r\n * @param {string} publicPath Unobfuscated name to export.\r\n * @param {*} object Object the name should point to.\r\n * @param {Object=} opt_objectToExportTo The object to add the path to; default\r\n * is goog.global.\r\n */\r\ngoog.exportSymbol = function(publicPath, object, opt_objectToExportTo) {\r\n goog.exportPath_(publicPath, object, opt_objectToExportTo);\r\n};\r\n\r\n\r\n/**\r\n * Exports a property unobfuscated into the object's namespace.\r\n * ex. goog.exportProperty(Foo, 'staticFunction', Foo.staticFunction);\r\n * ex. goog.exportProperty(Foo.prototype, 'myMethod', Foo.prototype.myMethod);\r\n * @param {Object} object Object whose static property is being exported.\r\n * @param {string} publicName Unobfuscated name to export.\r\n * @param {*} symbol Object the name should point to.\r\n */\r\ngoog.exportProperty = function(object, publicName, symbol) {\r\n object[publicName] = symbol;\r\n};\r\n\r\n\r\n/**\r\n * Inherit the prototype methods from one constructor into another.\r\n *\r\n * Usage:\r\n *
\r\n * function ParentClass(a, b) { }\r\n * ParentClass.prototype.foo = function(a) { };\r\n *\r\n * function ChildClass(a, b, c) {\r\n *   ChildClass.base(this, 'constructor', a, b);\r\n * }\r\n * goog.inherits(ChildClass, ParentClass);\r\n *\r\n * var child = new ChildClass('a', 'b', 'see');\r\n * child.foo(); // This works.\r\n * 
\r\n *\r\n * @param {!Function} childCtor Child class.\r\n * @param {!Function} parentCtor Parent class.\r\n * @suppress {strictMissingProperties} superClass_ and base is not defined on\r\n * Function.\r\n */\r\ngoog.inherits = function(childCtor, parentCtor) {\r\n /** @constructor */\r\n function tempCtor() {}\r\n tempCtor.prototype = parentCtor.prototype;\r\n childCtor.superClass_ = parentCtor.prototype;\r\n childCtor.prototype = new tempCtor();\r\n /** @override */\r\n childCtor.prototype.constructor = childCtor;\r\n\r\n /**\r\n * Calls superclass constructor/method.\r\n *\r\n * This function is only available if you use goog.inherits to\r\n * express inheritance relationships between classes.\r\n *\r\n * NOTE: This is a replacement for goog.base and for superClass_\r\n * property defined in childCtor.\r\n *\r\n * @param {!Object} me Should always be \"this\".\r\n * @param {string} methodName The method name to call. Calling\r\n * superclass constructor can be done with the special string\r\n * 'constructor'.\r\n * @param {...*} var_args The arguments to pass to superclass\r\n * method/constructor.\r\n * @return {*} The return value of the superclass method/constructor.\r\n */\r\n childCtor.base = function(me, methodName, var_args) {\r\n // Copying using loop to avoid deop due to passing arguments object to\r\n // function. This is faster in many JS engines as of late 2014.\r\n var args = new Array(arguments.length - 2);\r\n for (var i = 2; i < arguments.length; i++) {\r\n args[i - 2] = arguments[i];\r\n }\r\n return parentCtor.prototype[methodName].apply(me, args);\r\n };\r\n};\r\n\r\n\r\n/**\r\n * Call up to the superclass.\r\n *\r\n * If this is called from a constructor, then this calls the superclass\r\n * constructor with arguments 1-N.\r\n *\r\n * If this is called from a prototype method, then you must pass the name of the\r\n * method as the second argument to this function. If you do not, you will get a\r\n * runtime error. This calls the superclass' method with arguments 2-N.\r\n *\r\n * This function only works if you use goog.inherits to express inheritance\r\n * relationships between your classes.\r\n *\r\n * This function is a compiler primitive. At compile-time, the compiler will do\r\n * macro expansion to remove a lot of the extra overhead that this function\r\n * introduces. The compiler will also enforce a lot of the assumptions that this\r\n * function makes, and treat it as a compiler error if you break them.\r\n *\r\n * @param {!Object} me Should always be \"this\".\r\n * @param {*=} opt_methodName The method name if calling a super method.\r\n * @param {...*} var_args The rest of the arguments.\r\n * @return {*} The return value of the superclass method.\r\n * @suppress {es5Strict} This method can not be used in strict mode, but\r\n * all Closure Library consumers must depend on this file.\r\n * @deprecated goog.base is not strict mode compatible. Prefer the static\r\n * \"base\" method added to the constructor by goog.inherits\r\n * or ES6 classes and the \"super\" keyword.\r\n */\r\ngoog.base = function(me, opt_methodName, var_args) {\r\n var caller = arguments.callee.caller;\r\n\r\n if (goog.STRICT_MODE_COMPATIBLE || (goog.DEBUG && !caller)) {\r\n throw new Error(\r\n 'arguments.caller not defined. goog.base() cannot be used ' +\r\n 'with strict mode code. See ' +\r\n 'http://www.ecma-international.org/ecma-262/5.1/#sec-C');\r\n }\r\n\r\n if (typeof caller.superClass_ !== 'undefined') {\r\n // Copying using loop to avoid deop due to passing arguments object to\r\n // function. This is faster in many JS engines as of late 2014.\r\n var ctorArgs = new Array(arguments.length - 1);\r\n for (var i = 1; i < arguments.length; i++) {\r\n ctorArgs[i - 1] = arguments[i];\r\n }\r\n // This is a constructor. Call the superclass constructor.\r\n return /** @type {!Function} */ (caller.superClass_)\r\n .constructor.apply(me, ctorArgs);\r\n }\r\n\r\n if (typeof opt_methodName != 'string' && typeof opt_methodName != 'symbol') {\r\n throw new Error(\r\n 'method names provided to goog.base must be a string or a symbol');\r\n }\r\n\r\n // Copying using loop to avoid deop due to passing arguments object to\r\n // function. This is faster in many JS engines as of late 2014.\r\n var args = new Array(arguments.length - 2);\r\n for (var i = 2; i < arguments.length; i++) {\r\n args[i - 2] = arguments[i];\r\n }\r\n var foundCaller = false;\r\n for (var ctor = me.constructor; ctor;\r\n ctor = ctor.superClass_ && ctor.superClass_.constructor) {\r\n if (ctor.prototype[opt_methodName] === caller) {\r\n foundCaller = true;\r\n } else if (foundCaller) {\r\n return ctor.prototype[opt_methodName].apply(me, args);\r\n }\r\n }\r\n\r\n // If we did not find the caller in the prototype chain, then one of two\r\n // things happened:\r\n // 1) The caller is an instance method.\r\n // 2) This method was not called by the right caller.\r\n if (me[opt_methodName] === caller) {\r\n return me.constructor.prototype[opt_methodName].apply(me, args);\r\n } else {\r\n throw new Error(\r\n 'goog.base called from a method of one name ' +\r\n 'to a method of a different name');\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Allow for aliasing within scope functions. This function exists for\r\n * uncompiled code - in compiled code the calls will be inlined and the aliases\r\n * applied. In uncompiled code the function is simply run since the aliases as\r\n * written are valid JavaScript.\r\n *\r\n *\r\n * @param {function()} fn Function to call. This function can contain aliases\r\n * to namespaces (e.g. \"var dom = goog.dom\") or classes\r\n * (e.g. \"var Timer = goog.Timer\").\r\n */\r\ngoog.scope = function(fn) {\r\n if (goog.isInModuleLoader_()) {\r\n throw new Error('goog.scope is not supported within a module.');\r\n }\r\n fn.call(goog.global);\r\n};\r\n\r\n\r\n/*\r\n * To support uncompiled, strict mode bundles that use eval to divide source\r\n * like so:\r\n * eval('someSource;//# sourceUrl sourcefile.js');\r\n * We need to export the globally defined symbols \"goog\" and \"COMPILED\".\r\n * Exporting \"goog\" breaks the compiler optimizations, so we required that\r\n * be defined externally.\r\n * NOTE: We don't use goog.exportSymbol here because we don't want to trigger\r\n * extern generation when that compiler option is enabled.\r\n */\r\nif (!COMPILED) {\r\n goog.global['COMPILED'] = COMPILED;\r\n}\r\n\r\n\r\n//==============================================================================\r\n// goog.defineClass implementation\r\n//==============================================================================\r\n\r\n\r\n/**\r\n * Creates a restricted form of a Closure \"class\":\r\n * - from the compiler's perspective, the instance returned from the\r\n * constructor is sealed (no new properties may be added). This enables\r\n * better checks.\r\n * - the compiler will rewrite this definition to a form that is optimal\r\n * for type checking and optimization (initially this will be a more\r\n * traditional form).\r\n *\r\n * @param {Function} superClass The superclass, Object or null.\r\n * @param {goog.defineClass.ClassDescriptor} def\r\n * An object literal describing\r\n * the class. It may have the following properties:\r\n * \"constructor\": the constructor function\r\n * \"statics\": an object literal containing methods to add to the constructor\r\n * as \"static\" methods or a function that will receive the constructor\r\n * function as its only parameter to which static properties can\r\n * be added.\r\n * all other properties are added to the prototype.\r\n * @return {!Function} The class constructor.\r\n */\r\ngoog.defineClass = function(superClass, def) {\r\n // TODO(johnlenz): consider making the superClass an optional parameter.\r\n var constructor = def.constructor;\r\n var statics = def.statics;\r\n // Wrap the constructor prior to setting up the prototype and static methods.\r\n if (!constructor || constructor == Object.prototype.constructor) {\r\n constructor = function() {\r\n throw new Error(\r\n 'cannot instantiate an interface (no constructor defined).');\r\n };\r\n }\r\n\r\n var cls = goog.defineClass.createSealingConstructor_(constructor, superClass);\r\n if (superClass) {\r\n goog.inherits(cls, superClass);\r\n }\r\n\r\n // Remove all the properties that should not be copied to the prototype.\r\n delete def.constructor;\r\n delete def.statics;\r\n\r\n goog.defineClass.applyProperties_(cls.prototype, def);\r\n if (statics != null) {\r\n if (statics instanceof Function) {\r\n statics(cls);\r\n } else {\r\n goog.defineClass.applyProperties_(cls, statics);\r\n }\r\n }\r\n\r\n return cls;\r\n};\r\n\r\n\r\n/**\r\n * @typedef {{\r\n * constructor: (!Function|undefined),\r\n * statics: (Object|undefined|function(Function):void)\r\n * }}\r\n */\r\ngoog.defineClass.ClassDescriptor;\r\n\r\n\r\n/**\r\n * @define {boolean} Whether the instances returned by goog.defineClass should\r\n * be sealed when possible.\r\n *\r\n * When sealing is disabled the constructor function will not be wrapped by\r\n * goog.defineClass, making it incompatible with ES6 class methods.\r\n */\r\ngoog.defineClass.SEAL_CLASS_INSTANCES =\r\n goog.define('goog.defineClass.SEAL_CLASS_INSTANCES', goog.DEBUG);\r\n\r\n\r\n/**\r\n * If goog.defineClass.SEAL_CLASS_INSTANCES is enabled and Object.seal is\r\n * defined, this function will wrap the constructor in a function that seals the\r\n * results of the provided constructor function.\r\n *\r\n * @param {!Function} ctr The constructor whose results maybe be sealed.\r\n * @param {Function} superClass The superclass constructor.\r\n * @return {!Function} The replacement constructor.\r\n * @private\r\n */\r\ngoog.defineClass.createSealingConstructor_ = function(ctr, superClass) {\r\n if (!goog.defineClass.SEAL_CLASS_INSTANCES) {\r\n // Do now wrap the constructor when sealing is disabled. Angular code\r\n // depends on this for injection to work properly.\r\n return ctr;\r\n }\r\n\r\n // Compute whether the constructor is sealable at definition time, rather\r\n // than when the instance is being constructed.\r\n var superclassSealable = !goog.defineClass.isUnsealable_(superClass);\r\n\r\n /**\r\n * @this {Object}\r\n * @return {?}\r\n */\r\n var wrappedCtr = function() {\r\n // Don't seal an instance of a subclass when it calls the constructor of\r\n // its super class as there is most likely still setup to do.\r\n var instance = ctr.apply(this, arguments) || this;\r\n instance[goog.UID_PROPERTY_] = instance[goog.UID_PROPERTY_];\r\n\r\n if (this.constructor === wrappedCtr && superclassSealable &&\r\n Object.seal instanceof Function) {\r\n Object.seal(instance);\r\n }\r\n return instance;\r\n };\r\n\r\n return wrappedCtr;\r\n};\r\n\r\n\r\n/**\r\n * @param {Function} ctr The constructor to test.\r\n * @return {boolean} Whether the constructor has been tagged as unsealable\r\n * using goog.tagUnsealableClass.\r\n * @private\r\n */\r\ngoog.defineClass.isUnsealable_ = function(ctr) {\r\n return ctr && ctr.prototype &&\r\n ctr.prototype[goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_];\r\n};\r\n\r\n\r\n// TODO(johnlenz): share these values with the goog.object\r\n/**\r\n * The names of the fields that are defined on Object.prototype.\r\n * @type {!Array}\r\n * @private\r\n * @const\r\n */\r\ngoog.defineClass.OBJECT_PROTOTYPE_FIELDS_ = [\r\n 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable',\r\n 'toLocaleString', 'toString', 'valueOf'\r\n];\r\n\r\n\r\n// TODO(johnlenz): share this function with the goog.object\r\n/**\r\n * @param {!Object} target The object to add properties to.\r\n * @param {!Object} source The object to copy properties from.\r\n * @private\r\n */\r\ngoog.defineClass.applyProperties_ = function(target, source) {\r\n // TODO(johnlenz): update this to support ES5 getters/setters\r\n\r\n var key;\r\n for (key in source) {\r\n if (Object.prototype.hasOwnProperty.call(source, key)) {\r\n target[key] = source[key];\r\n }\r\n }\r\n\r\n // For IE the for-in-loop does not contain any properties that are not\r\n // enumerable on the prototype object (for example isPrototypeOf from\r\n // Object.prototype) and it will also not include 'replace' on objects that\r\n // extend String and change 'replace' (not that it is common for anyone to\r\n // extend anything except Object).\r\n for (var i = 0; i < goog.defineClass.OBJECT_PROTOTYPE_FIELDS_.length; i++) {\r\n key = goog.defineClass.OBJECT_PROTOTYPE_FIELDS_[i];\r\n if (Object.prototype.hasOwnProperty.call(source, key)) {\r\n target[key] = source[key];\r\n }\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Sealing classes breaks the older idiom of assigning properties on the\r\n * prototype rather than in the constructor. As such, goog.defineClass\r\n * must not seal subclasses of these old-style classes until they are fixed.\r\n * Until then, this marks a class as \"broken\", instructing defineClass\r\n * not to seal subclasses.\r\n * @param {!Function} ctr The legacy constructor to tag as unsealable.\r\n */\r\ngoog.tagUnsealableClass = function(ctr) {\r\n if (!COMPILED && goog.defineClass.SEAL_CLASS_INSTANCES) {\r\n ctr.prototype[goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_] = true;\r\n }\r\n};\r\n\r\n\r\n/**\r\n * Name for unsealable tag property.\r\n * @const @private {string}\r\n */\r\ngoog.UNSEALABLE_CONSTRUCTOR_PROPERTY_ = 'goog_defineClass_legacy_unsealable';\r\n\r\n\r\n// There's a bug in the compiler where without collapse properties the\r\n// Closure namespace defines do not guard code correctly. To help reduce code\r\n// size also check for !COMPILED even though it redundant until this is fixed.\r\nif (!COMPILED && goog.DEPENDENCIES_ENABLED) {\r\n\r\n /**\r\n * Tries to detect whether is in the context of an HTML document.\r\n * @return {boolean} True if it looks like HTML document.\r\n * @private\r\n */\r\n goog.inHtmlDocument_ = function() {\r\n /** @type {!Document} */\r\n var doc = goog.global.document;\r\n return doc != null && 'write' in doc; // XULDocument misses write.\r\n };\r\n\r\n\r\n /**\r\n * We'd like to check for if the document readyState is 'loading'; however\r\n * there are bugs on IE 10 and below where the readyState being anything other\r\n * than 'complete' is not reliable.\r\n * @return {boolean}\r\n * @private\r\n */\r\n goog.isDocumentLoading_ = function() {\r\n // attachEvent is available on IE 6 thru 10 only, and thus can be used to\r\n // detect those browsers.\r\n /** @type {!HTMLDocument} */\r\n var doc = goog.global.document;\r\n return doc.attachEvent ? doc.readyState != 'complete' :\r\n doc.readyState == 'loading';\r\n };\r\n\r\n\r\n /**\r\n * Tries to detect the base path of base.js script that bootstraps Closure.\r\n * @private\r\n */\r\n goog.findBasePath_ = function() {\r\n if (goog.isDef(goog.global.CLOSURE_BASE_PATH) &&\r\n // Anti DOM-clobbering runtime check (b/37736576).\r\n goog.isString(goog.global.CLOSURE_BASE_PATH)) {\r\n goog.basePath = goog.global.CLOSURE_BASE_PATH;\r\n return;\r\n } else if (!goog.inHtmlDocument_()) {\r\n return;\r\n }\r\n /** @type {!Document} */\r\n var doc = goog.global.document;\r\n // If we have a currentScript available, use it exclusively.\r\n var currentScript = doc.currentScript;\r\n if (currentScript) {\r\n var scripts = [currentScript];\r\n } else {\r\n var scripts = doc.getElementsByTagName('SCRIPT');\r\n }\r\n // Search backwards since the current script is in almost all cases the one\r\n // that has base.js.\r\n for (var i = scripts.length - 1; i >= 0; --i) {\r\n var script = /** @type {!HTMLScriptElement} */ (scripts[i]);\r\n var src = script.src;\r\n var qmark = src.lastIndexOf('?');\r\n var l = qmark == -1 ? src.length : qmark;\r\n if (src.substr(l - 7, 7) == 'base.js') {\r\n goog.basePath = src.substr(0, l - 7);\r\n return;\r\n }\r\n }\r\n };\r\n\r\n goog.findBasePath_();\r\n\r\n /** @struct @constructor @final */\r\n goog.Transpiler = function() {\r\n /** @private {?Object} */\r\n this.requiresTranspilation_ = null;\r\n /** @private {string} */\r\n this.transpilationTarget_ = goog.TRANSPILE_TO_LANGUAGE;\r\n };\r\n\r\n\r\n /**\r\n * Returns a newly created map from language mode string to a boolean\r\n * indicating whether transpilation should be done for that mode as well as\r\n * the highest level language that this environment supports.\r\n *\r\n * Guaranteed invariant:\r\n * For any two modes, l1 and l2 where l2 is a newer mode than l1,\r\n * `map[l1] == true` implies that `map[l2] == true`.\r\n *\r\n * Note this method is extracted and used elsewhere, so it cannot rely on\r\n * anything external (it should easily be able to be transformed into a\r\n * standalone, top level function).\r\n *\r\n * @private\r\n * @return {{\r\n * target: string,\r\n * map: !Object\r\n * }}\r\n */\r\n goog.Transpiler.prototype.createRequiresTranspilation_ = function() {\r\n var transpilationTarget = 'es3';\r\n var /** !Object */ requiresTranspilation = {'es3': false};\r\n var transpilationRequiredForAllLaterModes = false;\r\n\r\n /**\r\n * Adds an entry to requiresTranspliation for the given language mode.\r\n *\r\n * IMPORTANT: Calls must be made in order from oldest to newest language\r\n * mode.\r\n * @param {string} modeName\r\n * @param {function(): boolean} isSupported Returns true if the JS engine\r\n * supports the given mode.\r\n */\r\n function addNewerLanguageTranspilationCheck(modeName, isSupported) {\r\n if (transpilationRequiredForAllLaterModes) {\r\n requiresTranspilation[modeName] = true;\r\n } else if (isSupported()) {\r\n transpilationTarget = modeName;\r\n requiresTranspilation[modeName] = false;\r\n } else {\r\n requiresTranspilation[modeName] = true;\r\n transpilationRequiredForAllLaterModes = true;\r\n }\r\n }\r\n\r\n /**\r\n * Does the given code evaluate without syntax errors and return a truthy\r\n * result?\r\n */\r\n function /** boolean */ evalCheck(/** string */ code) {\r\n try {\r\n return !!eval(code);\r\n } catch (ignored) {\r\n return false;\r\n }\r\n }\r\n\r\n var userAgent = goog.global.navigator && goog.global.navigator.userAgent ?\r\n goog.global.navigator.userAgent :\r\n '';\r\n\r\n // Identify ES3-only browsers by their incorrect treatment of commas.\r\n addNewerLanguageTranspilationCheck('es5', function() {\r\n return evalCheck('[1,].length==1');\r\n });\r\n addNewerLanguageTranspilationCheck('es6', function() {\r\n // Edge has a non-deterministic (i.e., not reproducible) bug with ES6:\r\n // https://github.com/Microsoft/ChakraCore/issues/1496.\r\n var re = /Edge\\/(\\d+)(\\.\\d)*/i;\r\n var edgeUserAgent = userAgent.match(re);\r\n if (edgeUserAgent) {\r\n // The Reflect.construct test below is flaky on Edge. It can sometimes\r\n // pass or fail on 40 15.15063, so just exit early for Edge and treat\r\n // it as ES5. Until we're on a more up to date version just always use\r\n // ES5. See https://github.com/Microsoft/ChakraCore/issues/3217.\r\n return false;\r\n }\r\n // Test es6: [FF50 (?), Edge 14 (?), Chrome 50]\r\n // (a) default params (specifically shadowing locals),\r\n // (b) destructuring, (c) block-scoped functions,\r\n // (d) for-of (const), (e) new.target/Reflect.construct\r\n var es6fullTest =\r\n 'class X{constructor(){if(new.target!=String)throw 1;this.x=42}}' +\r\n 'let q=Reflect.construct(X,[],String);if(q.x!=42||!(q instanceof ' +\r\n 'String))throw 1;for(const a of[2,3]){if(a==2)continue;function ' +\r\n 'f(z={a}){let a=0;return z.a}{function f(){return 0;}}return f()' +\r\n '==3}';\r\n\r\n return evalCheck('(()=>{\"use strict\";' + es6fullTest + '})()');\r\n });\r\n // ** and **= are the only new features in 'es7'\r\n addNewerLanguageTranspilationCheck('es7', function() {\r\n return evalCheck('2 ** 2 == 4');\r\n });\r\n // async functions are the only new features in 'es8'\r\n addNewerLanguageTranspilationCheck('es8', function() {\r\n return evalCheck('async () => 1, true');\r\n });\r\n addNewerLanguageTranspilationCheck('es9', function() {\r\n return evalCheck('({...rest} = {}), true');\r\n });\r\n addNewerLanguageTranspilationCheck('es_next', function() {\r\n return false; // assume it always need to transpile\r\n });\r\n return {target: transpilationTarget, map: requiresTranspilation};\r\n };\r\n\r\n\r\n /**\r\n * Determines whether the given language needs to be transpiled.\r\n * @param {string} lang\r\n * @param {string|undefined} module\r\n * @return {boolean}\r\n */\r\n goog.Transpiler.prototype.needsTranspile = function(lang, module) {\r\n if (goog.TRANSPILE == 'always') {\r\n return true;\r\n } else if (goog.TRANSPILE == 'never') {\r\n return false;\r\n } else if (!this.requiresTranspilation_) {\r\n var obj = this.createRequiresTranspilation_();\r\n this.requiresTranspilation_ = obj.map;\r\n this.transpilationTarget_ = this.transpilationTarget_ || obj.target;\r\n }\r\n if (lang in this.requiresTranspilation_) {\r\n if (this.requiresTranspilation_[lang]) {\r\n return true;\r\n } else if (\r\n goog.inHtmlDocument_() && module == 'es6' &&\r\n !('noModule' in goog.global.document.createElement('script'))) {\r\n return true;\r\n } else {\r\n return false;\r\n }\r\n } else {\r\n throw new Error('Unknown language mode: ' + lang);\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Lazily retrieves the transpiler and applies it to the source.\r\n * @param {string} code JS code.\r\n * @param {string} path Path to the code.\r\n * @return {string} The transpiled code.\r\n */\r\n goog.Transpiler.prototype.transpile = function(code, path) {\r\n // TODO(johnplaisted): We should delete goog.transpile_ and just have this\r\n // function. But there's some compile error atm where goog.global is being\r\n // stripped incorrectly without this.\r\n return goog.transpile_(code, path, this.transpilationTarget_);\r\n };\r\n\r\n\r\n /** @private @final {!goog.Transpiler} */\r\n goog.transpiler_ = new goog.Transpiler();\r\n\r\n /**\r\n * Rewrites closing script tags in input to avoid ending an enclosing script\r\n * tag.\r\n *\r\n * @param {string} str\r\n * @return {string}\r\n * @private\r\n */\r\n goog.protectScriptTag_ = function(str) {\r\n return str.replace(/<\\/(SCRIPT)/ig, '\\\\x3c/$1');\r\n };\r\n\r\n\r\n /**\r\n * A debug loader is responsible for downloading and executing javascript\r\n * files in an unbundled, uncompiled environment.\r\n *\r\n * This can be custimized via the setDependencyFactory method, or by\r\n * CLOSURE_IMPORT_SCRIPT/CLOSURE_LOAD_FILE_SYNC.\r\n *\r\n * @struct @constructor @final @private\r\n */\r\n goog.DebugLoader_ = function() {\r\n /** @private @const {!Object} */\r\n this.dependencies_ = {};\r\n /** @private @const {!Object} */\r\n this.idToPath_ = {};\r\n /** @private @const {!Object} */\r\n this.written_ = {};\r\n /** @private @const {!Array} */\r\n this.loadingDeps_ = [];\r\n /** @private {!Array} */\r\n this.depsToLoad_ = [];\r\n /** @private {boolean} */\r\n this.paused_ = false;\r\n /** @private {!goog.DependencyFactory} */\r\n this.factory_ = new goog.DependencyFactory(goog.transpiler_);\r\n /** @private @const {!Object} */\r\n this.deferredCallbacks_ = {};\r\n /** @private @const {!Array} */\r\n this.deferredQueue_ = [];\r\n };\r\n\r\n /**\r\n * @param {!Array} namespaces\r\n * @param {function(): undefined} callback Function to call once all the\r\n * namespaces have loaded.\r\n */\r\n goog.DebugLoader_.prototype.bootstrap = function(namespaces, callback) {\r\n var cb = callback;\r\n function resolve() {\r\n if (cb) {\r\n goog.global.setTimeout(cb, 0);\r\n cb = null;\r\n }\r\n }\r\n\r\n if (!namespaces.length) {\r\n resolve();\r\n return;\r\n }\r\n\r\n var deps = [];\r\n for (var i = 0; i < namespaces.length; i++) {\r\n var path = this.getPathFromDeps_(namespaces[i]);\r\n if (!path) {\r\n throw new Error('Unregonized namespace: ' + namespaces[i]);\r\n }\r\n deps.push(this.dependencies_[path]);\r\n }\r\n\r\n var require = goog.require;\r\n var loaded = 0;\r\n for (var i = 0; i < namespaces.length; i++) {\r\n require(namespaces[i]);\r\n deps[i].onLoad(function() {\r\n if (++loaded == namespaces.length) {\r\n resolve();\r\n }\r\n });\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Loads the Closure Dependency file.\r\n *\r\n * Exposed a public function so CLOSURE_NO_DEPS can be set to false, base\r\n * loaded, setDependencyFactory called, and then this called. i.e. allows\r\n * custom loading of the deps file.\r\n */\r\n goog.DebugLoader_.prototype.loadClosureDeps = function() {\r\n // Circumvent addDependency, which would try to transpile deps.js if\r\n // transpile is set to always.\r\n var relPath = 'deps.js';\r\n this.depsToLoad_.push(this.factory_.createDependency(\r\n goog.normalizePath_(goog.basePath + relPath), relPath, [], [], {},\r\n false));\r\n this.loadDeps_();\r\n };\r\n\r\n\r\n /**\r\n * Notifies the debug loader when a dependency has been requested.\r\n *\r\n * @param {string} absPathOrId Path of the dependency or goog id.\r\n * @param {boolean=} opt_force\r\n */\r\n goog.DebugLoader_.prototype.requested = function(absPathOrId, opt_force) {\r\n var path = this.getPathFromDeps_(absPathOrId);\r\n if (path &&\r\n (opt_force || this.areDepsLoaded_(this.dependencies_[path].requires))) {\r\n var callback = this.deferredCallbacks_[path];\r\n if (callback) {\r\n delete this.deferredCallbacks_[path];\r\n callback();\r\n }\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Sets the dependency factory, which can be used to create custom\r\n * goog.Dependency implementations to control how dependencies are loaded.\r\n *\r\n * @param {!goog.DependencyFactory} factory\r\n */\r\n goog.DebugLoader_.prototype.setDependencyFactory = function(factory) {\r\n this.factory_ = factory;\r\n };\r\n\r\n\r\n /**\r\n * Travserses the dependency graph and queues the given dependency, and all of\r\n * its transitive dependencies, for loading and then starts loading if not\r\n * paused.\r\n *\r\n * @param {string} namespace\r\n * @private\r\n */\r\n goog.DebugLoader_.prototype.load_ = function(namespace) {\r\n if (!this.getPathFromDeps_(namespace)) {\r\n var errorMessage = 'goog.require could not find: ' + namespace;\r\n\r\n goog.logToConsole_(errorMessage);\r\n throw Error(errorMessage);\r\n } else {\r\n var loader = this;\r\n\r\n var deps = [];\r\n\r\n /** @param {string} namespace */\r\n var visit = function(namespace) {\r\n var path = loader.getPathFromDeps_(namespace);\r\n\r\n if (!path) {\r\n throw new Error('Bad dependency path or symbol: ' + namespace);\r\n }\r\n\r\n if (loader.written_[path]) {\r\n return;\r\n }\r\n\r\n loader.written_[path] = true;\r\n\r\n var dep = loader.dependencies_[path];\r\n for (var i = 0; i < dep.requires.length; i++) {\r\n if (!goog.isProvided_(dep.requires[i])) {\r\n visit(dep.requires[i]);\r\n }\r\n }\r\n\r\n deps.push(dep);\r\n };\r\n\r\n visit(namespace);\r\n\r\n var wasLoading = !!this.depsToLoad_.length;\r\n this.depsToLoad_ = this.depsToLoad_.concat(deps);\r\n\r\n if (!this.paused_ && !wasLoading) {\r\n this.loadDeps_();\r\n }\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Loads any queued dependencies until they are all loaded or paused.\r\n *\r\n * @private\r\n */\r\n goog.DebugLoader_.prototype.loadDeps_ = function() {\r\n var loader = this;\r\n var paused = this.paused_;\r\n\r\n while (this.depsToLoad_.length && !paused) {\r\n (function() {\r\n var loadCallDone = false;\r\n var dep = loader.depsToLoad_.shift();\r\n\r\n var loaded = false;\r\n loader.loading_(dep);\r\n\r\n var controller = {\r\n pause: function() {\r\n if (loadCallDone) {\r\n throw new Error('Cannot call pause after the call to load.');\r\n } else {\r\n paused = true;\r\n }\r\n },\r\n resume: function() {\r\n if (loadCallDone) {\r\n loader.resume_();\r\n } else {\r\n // Some dep called pause and then resume in the same load call.\r\n // Just keep running this same loop.\r\n paused = false;\r\n }\r\n },\r\n loaded: function() {\r\n if (loaded) {\r\n throw new Error('Double call to loaded.');\r\n }\r\n\r\n loaded = true;\r\n loader.loaded_(dep);\r\n },\r\n pending: function() {\r\n // Defensive copy.\r\n var pending = [];\r\n for (var i = 0; i < loader.loadingDeps_.length; i++) {\r\n pending.push(loader.loadingDeps_[i]);\r\n }\r\n return pending;\r\n },\r\n /**\r\n * @param {goog.ModuleType} type\r\n */\r\n setModuleState: function(type) {\r\n goog.moduleLoaderState_ = {\r\n type: type,\r\n moduleName: '',\r\n declareLegacyNamespace: false\r\n };\r\n },\r\n /** @type {function(string, string, string=)} */\r\n registerEs6ModuleExports: function(\r\n path, exports, opt_closureNamespace) {\r\n if (opt_closureNamespace) {\r\n goog.loadedModules_[opt_closureNamespace] = {\r\n exports: exports,\r\n type: goog.ModuleType.ES6,\r\n moduleId: opt_closureNamespace || ''\r\n };\r\n }\r\n },\r\n /** @type {function(string, ?)} */\r\n registerGoogModuleExports: function(moduleId, exports) {\r\n goog.loadedModules_[moduleId] = {\r\n exports: exports,\r\n type: goog.ModuleType.GOOG,\r\n moduleId: moduleId\r\n };\r\n },\r\n clearModuleState: function() {\r\n goog.moduleLoaderState_ = null;\r\n },\r\n defer: function(callback) {\r\n if (loadCallDone) {\r\n throw new Error(\r\n 'Cannot register with defer after the call to load.');\r\n }\r\n loader.defer_(dep, callback);\r\n },\r\n areDepsLoaded: function() {\r\n return loader.areDepsLoaded_(dep.requires);\r\n }\r\n };\r\n\r\n try {\r\n dep.load(controller);\r\n } finally {\r\n loadCallDone = true;\r\n }\r\n })();\r\n }\r\n\r\n if (paused) {\r\n this.pause_();\r\n }\r\n };\r\n\r\n\r\n /** @private */\r\n goog.DebugLoader_.prototype.pause_ = function() {\r\n this.paused_ = true;\r\n };\r\n\r\n\r\n /** @private */\r\n goog.DebugLoader_.prototype.resume_ = function() {\r\n if (this.paused_) {\r\n this.paused_ = false;\r\n this.loadDeps_();\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Marks the given dependency as loading (load has been called but it has not\r\n * yet marked itself as finished). Useful for dependencies that want to know\r\n * what else is loading. Example: goog.modules cannot eval if there are\r\n * loading dependencies.\r\n *\r\n * @param {!goog.Dependency} dep\r\n * @private\r\n */\r\n goog.DebugLoader_.prototype.loading_ = function(dep) {\r\n this.loadingDeps_.push(dep);\r\n };\r\n\r\n\r\n /**\r\n * Marks the given dependency as having finished loading and being available\r\n * for require.\r\n *\r\n * @param {!goog.Dependency} dep\r\n * @private\r\n */\r\n goog.DebugLoader_.prototype.loaded_ = function(dep) {\r\n for (var i = 0; i < this.loadingDeps_.length; i++) {\r\n if (this.loadingDeps_[i] == dep) {\r\n this.loadingDeps_.splice(i, 1);\r\n break;\r\n }\r\n }\r\n\r\n for (var i = 0; i < this.deferredQueue_.length; i++) {\r\n if (this.deferredQueue_[i] == dep.path) {\r\n this.deferredQueue_.splice(i, 1);\r\n break;\r\n }\r\n }\r\n\r\n if (this.loadingDeps_.length == this.deferredQueue_.length &&\r\n !this.depsToLoad_.length) {\r\n // Something has asked to load these, but they may not be directly\r\n // required again later, so load them now that we know we're done loading\r\n // everything else. e.g. a goog module entry point.\r\n while (this.deferredQueue_.length) {\r\n this.requested(this.deferredQueue_.shift(), true);\r\n }\r\n }\r\n\r\n dep.loaded();\r\n };\r\n\r\n\r\n /**\r\n * @param {!Array} pathsOrIds\r\n * @return {boolean}\r\n * @private\r\n */\r\n goog.DebugLoader_.prototype.areDepsLoaded_ = function(pathsOrIds) {\r\n for (var i = 0; i < pathsOrIds.length; i++) {\r\n var path = this.getPathFromDeps_(pathsOrIds[i]);\r\n if (!path ||\r\n (!(path in this.deferredCallbacks_) &&\r\n !goog.isProvided_(pathsOrIds[i]))) {\r\n return false;\r\n }\r\n }\r\n\r\n return true;\r\n };\r\n\r\n\r\n /**\r\n * @param {string} absPathOrId\r\n * @return {?string}\r\n * @private\r\n */\r\n goog.DebugLoader_.prototype.getPathFromDeps_ = function(absPathOrId) {\r\n if (absPathOrId in this.idToPath_) {\r\n return this.idToPath_[absPathOrId];\r\n } else if (absPathOrId in this.dependencies_) {\r\n return absPathOrId;\r\n } else {\r\n return null;\r\n }\r\n };\r\n\r\n\r\n /**\r\n * @param {!goog.Dependency} dependency\r\n * @param {!Function} callback\r\n * @private\r\n */\r\n goog.DebugLoader_.prototype.defer_ = function(dependency, callback) {\r\n this.deferredCallbacks_[dependency.path] = callback;\r\n this.deferredQueue_.push(dependency.path);\r\n };\r\n\r\n\r\n /**\r\n * Interface for goog.Dependency implementations to have some control over\r\n * loading of dependencies.\r\n *\r\n * @record\r\n */\r\n goog.LoadController = function() {};\r\n\r\n\r\n /**\r\n * Tells the controller to halt loading of more dependencies.\r\n */\r\n goog.LoadController.prototype.pause = function() {};\r\n\r\n\r\n /**\r\n * Tells the controller to resume loading of more dependencies if paused.\r\n */\r\n goog.LoadController.prototype.resume = function() {};\r\n\r\n\r\n /**\r\n * Tells the controller that this dependency has finished loading.\r\n *\r\n * This causes this to be removed from pending() and any load callbacks to\r\n * fire.\r\n */\r\n goog.LoadController.prototype.loaded = function() {};\r\n\r\n\r\n /**\r\n * List of dependencies on which load has been called but which have not\r\n * called loaded on their controller. This includes the current dependency.\r\n *\r\n * @return {!Array}\r\n */\r\n goog.LoadController.prototype.pending = function() {};\r\n\r\n\r\n /**\r\n * Registers an object as an ES6 module's exports so that goog.modules may\r\n * require it by path.\r\n *\r\n * @param {string} path Full path of the module.\r\n * @param {?} exports\r\n * @param {string=} opt_closureNamespace Closure namespace to associate with\r\n * this module.\r\n */\r\n goog.LoadController.prototype.registerEs6ModuleExports = function(\r\n path, exports, opt_closureNamespace) {};\r\n\r\n\r\n /**\r\n * Sets the current module state.\r\n *\r\n * @param {goog.ModuleType} type Type of module.\r\n */\r\n goog.LoadController.prototype.setModuleState = function(type) {};\r\n\r\n\r\n /**\r\n * Clears the current module state.\r\n */\r\n goog.LoadController.prototype.clearModuleState = function() {};\r\n\r\n\r\n /**\r\n * Registers a callback to call once the dependency is actually requested\r\n * via goog.require + all of the immediate dependencies have been loaded or\r\n * all other files have been loaded. Allows for lazy loading until\r\n * require'd without pausing dependency loading, which is needed on old IE.\r\n *\r\n * @param {!Function} callback\r\n */\r\n goog.LoadController.prototype.defer = function(callback) {};\r\n\r\n\r\n /**\r\n * @return {boolean}\r\n */\r\n goog.LoadController.prototype.areDepsLoaded = function() {};\r\n\r\n\r\n /**\r\n * Basic super class for all dependencies Closure Library can load.\r\n *\r\n * This default implementation is designed to load untranspiled, non-module\r\n * scripts in a web broswer.\r\n *\r\n * For transpiled non-goog.module files {@see goog.TranspiledDependency}.\r\n * For goog.modules see {@see goog.GoogModuleDependency}.\r\n * For untranspiled ES6 modules {@see goog.Es6ModuleDependency}.\r\n *\r\n * @param {string} path Absolute path of this script.\r\n * @param {string} relativePath Path of this script relative to goog.basePath.\r\n * @param {!Array} provides goog.provided or goog.module symbols\r\n * in this file.\r\n * @param {!Array} requires goog symbols or relative paths to Closure\r\n * this depends on.\r\n * @param {!Object} loadFlags\r\n * @struct @constructor\r\n */\r\n goog.Dependency = function(\r\n path, relativePath, provides, requires, loadFlags) {\r\n /** @const */\r\n this.path = path;\r\n /** @const */\r\n this.relativePath = relativePath;\r\n /** @const */\r\n this.provides = provides;\r\n /** @const */\r\n this.requires = requires;\r\n /** @const */\r\n this.loadFlags = loadFlags;\r\n /** @private {boolean} */\r\n this.loaded_ = false;\r\n /** @private {!Array} */\r\n this.loadCallbacks_ = [];\r\n };\r\n\r\n\r\n /**\r\n * @return {string} The pathname part of this dependency's path if it is a\r\n * URI.\r\n */\r\n goog.Dependency.prototype.getPathName = function() {\r\n var pathName = this.path;\r\n var protocolIndex = pathName.indexOf('://');\r\n if (protocolIndex >= 0) {\r\n pathName = pathName.substring(protocolIndex + 3);\r\n var slashIndex = pathName.indexOf('/');\r\n if (slashIndex >= 0) {\r\n pathName = pathName.substring(slashIndex + 1);\r\n }\r\n }\r\n return pathName;\r\n };\r\n\r\n\r\n /**\r\n * @param {function()} callback Callback to fire as soon as this has loaded.\r\n * @final\r\n */\r\n goog.Dependency.prototype.onLoad = function(callback) {\r\n if (this.loaded_) {\r\n callback();\r\n } else {\r\n this.loadCallbacks_.push(callback);\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Marks this dependency as loaded and fires any callbacks registered with\r\n * onLoad.\r\n * @final\r\n */\r\n goog.Dependency.prototype.loaded = function() {\r\n this.loaded_ = true;\r\n var callbacks = this.loadCallbacks_;\r\n this.loadCallbacks_ = [];\r\n for (var i = 0; i < callbacks.length; i++) {\r\n callbacks[i]();\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Whether or not document.written / appended script tags should be deferred.\r\n *\r\n * @private {boolean}\r\n */\r\n goog.Dependency.defer_ = false;\r\n\r\n\r\n /**\r\n * Map of script ready / state change callbacks. Old IE cannot handle putting\r\n * these properties on goog.global.\r\n *\r\n * @private @const {!Object}\r\n */\r\n goog.Dependency.callbackMap_ = {};\r\n\r\n\r\n /**\r\n * @param {function(...?):?} callback\r\n * @return {string}\r\n * @private\r\n */\r\n goog.Dependency.registerCallback_ = function(callback) {\r\n var key = Math.random().toString(32);\r\n goog.Dependency.callbackMap_[key] = callback;\r\n return key;\r\n };\r\n\r\n\r\n /**\r\n * @param {string} key\r\n * @private\r\n */\r\n goog.Dependency.unregisterCallback_ = function(key) {\r\n delete goog.Dependency.callbackMap_[key];\r\n };\r\n\r\n\r\n /**\r\n * @param {string} key\r\n * @param {...?} var_args\r\n * @private\r\n * @suppress {unusedPrivateMembers}\r\n */\r\n goog.Dependency.callback_ = function(key, var_args) {\r\n if (key in goog.Dependency.callbackMap_) {\r\n var callback = goog.Dependency.callbackMap_[key];\r\n var args = [];\r\n for (var i = 1; i < arguments.length; i++) {\r\n args.push(arguments[i]);\r\n }\r\n callback.apply(undefined, args);\r\n } else {\r\n var errorMessage = 'Callback key ' + key +\r\n ' does not exist (was base.js loaded more than once?).';\r\n throw Error(errorMessage);\r\n }\r\n };\r\n\r\n\r\n /**\r\n * Starts loading this dependency. This dependency can pause loading if it\r\n * needs to and resume it later via the controller interface.\r\n *\r\n * When this is loaded it should call controller.loaded(). Note that this will\r\n * end up calling the loaded method of this dependency; there is no need to\r\n * call it explicitly.\r\n *\r\n * @param {!goog.LoadController} controller\r\n */\r\n goog.Dependency.prototype.load = function(controller) {\r\n if (goog.global.CLOSURE_IMPORT_SCRIPT) {\r\n if (goog.global.CLOSURE_IMPORT_SCRIPT(this.path)) {\r\n controller.loaded();\r\n } else {\r\n controller.pause();\r\n }\r\n return;\r\n }\r\n\r\n if (!goog.inHtmlDocument_()) {\r\n goog.logToConsole_(\r\n 'Cannot use default debug loader outside of HTML documents.');\r\n if (this.relativePath == 'deps.js') {\r\n // Some old code is relying on base.js auto loading deps.js failing with\r\n // no error before later setting CLOSURE_IMPORT_SCRIPT.\r\n // CLOSURE_IMPORT_SCRIPT should be set *before* base.js is loaded, or\r\n // CLOSURE_NO_DEPS set to true.\r\n goog.logToConsole_(\r\n 'Consider setting CLOSURE_IMPORT_SCRIPT before loading base.js, ' +\r\n 'or setting CLOSURE_NO_DEPS to true.');\r\n controller.loaded();\r\n } else {\r\n controller.pause();\r\n }\r\n return;\r\n }\r\n\r\n /** @type {!HTMLDocument} */\r\n var doc = goog.global.document;\r\n\r\n // If the user tries to require a new symbol after document load,\r\n // something has gone terribly wrong. Doing a document.write would\r\n // wipe out the page. This does not apply to the CSP-compliant method\r\n // of writing script tags.\r\n if (doc.readyState == 'complete' &&\r\n !goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING) {\r\n // Certain test frameworks load base.js multiple times, which tries\r\n // to write deps.js each time. If that happens, just fail silently.\r\n // These frameworks wipe the page between each load of base.js, so this\r\n // is OK.\r\n var isDeps = /\\bdeps.js$/.test(this.path);\r\n if (isDeps) {\r\n controller.loaded();\r\n return;\r\n } else {\r\n throw Error('Cannot write \"' + this.path + '\" after document load');\r\n }\r\n }\r\n\r\n if (!goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING &&\r\n goog.isDocumentLoading_()) {\r\n var key = goog.Dependency.registerCallback_(function(script) {\r\n if (!goog.DebugLoader_.IS_OLD_IE_ || script.readyState == 'complete') {\r\n goog.Dependency.unregisterCallback_(key);\r\n controller.loaded();\r\n }\r\n });\r\n var nonceAttr = !goog.DebugLoader_.IS_OLD_IE_ && goog.getScriptNonce() ?\r\n ' nonce=\"' + goog.getScriptNonce() + '\"' :\r\n '';\r\n var event =\r\n goog.DebugLoader_.IS_OLD_IE_ ? 'onreadystatechange' : 'onload';\r\n var defer = goog.Dependency.defer_ ? 'defer' : '';\r\n var script = '