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Diffstat (limited to 'src/http/static/viz/1/goog/base.js')
| -rw-r--r-- | src/http/static/viz/1/goog/base.js | 2727 |
1 files changed, 0 insertions, 2727 deletions
diff --git a/src/http/static/viz/1/goog/base.js b/src/http/static/viz/1/goog/base.js deleted file mode 100644 index 97a9947..0000000 --- a/src/http/static/viz/1/goog/base.js +++ /dev/null @@ -1,2727 +0,0 @@ -// Copyright 2006 The Closure Library Authors. All Rights Reserved. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS-IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -/** - * @fileoverview Bootstrap for the Google JS Library (Closure). - * - * In uncompiled mode base.js will write out Closure's deps file, unless the - * global <code>CLOSURE_NO_DEPS</code> is set to true. This allows projects to - * include their own deps file(s) from different locations. - * - * @author arv@google.com (Erik Arvidsson) - * - * @provideGoog - */ - - -/** - * @define {boolean} Overridden to true by the compiler when - * --process_closure_primitives is specified. - */ -var COMPILED = false; - - -/** - * Base namespace for the Closure library. Checks to see goog is already - * defined in the current scope before assigning to prevent clobbering if - * base.js is loaded more than once. - * - * @const - */ -var goog = goog || {}; - - -/** - * Reference to the global context. In most cases this will be 'window'. - */ -goog.global = this; - - -/** - * A hook for overriding the define values in uncompiled mode. - * - * In uncompiled mode, {@code CLOSURE_UNCOMPILED_DEFINES} may be defined before - * loading base.js. If a key is defined in {@code CLOSURE_UNCOMPILED_DEFINES}, - * {@code goog.define} will use the value instead of the default value. This - * allows flags to be overwritten without compilation (this is normally - * accomplished with the compiler's "define" flag). - * - * Example: - * <pre> - * var CLOSURE_UNCOMPILED_DEFINES = {'goog.DEBUG': false}; - * </pre> - * - * @type {Object<string, (string|number|boolean)>|undefined} - */ -goog.global.CLOSURE_UNCOMPILED_DEFINES; - - -/** - * A hook for overriding the define values in uncompiled or compiled mode, - * like CLOSURE_UNCOMPILED_DEFINES but effective in compiled code. In - * uncompiled code CLOSURE_UNCOMPILED_DEFINES takes precedence. - * - * Also unlike CLOSURE_UNCOMPILED_DEFINES the values must be number, boolean or - * string literals or the compiler will emit an error. - * - * While any @define value may be set, only those set with goog.define will be - * effective for uncompiled code. - * - * Example: - * <pre> - * var CLOSURE_DEFINES = {'goog.DEBUG': false} ; - * </pre> - * - * @type {Object<string, (string|number|boolean)>|undefined} - */ -goog.global.CLOSURE_DEFINES; - - -/** - * Returns true if the specified value is not undefined. - * WARNING: Do not use this to test if an object has a property. Use the in - * operator instead. - * - * @param {?} val Variable to test. - * @return {boolean} Whether variable is defined. - */ -goog.isDef = function(val) { - // void 0 always evaluates to undefined and hence we do not need to depend on - // the definition of the global variable named 'undefined'. - return val !== void 0; -}; - - -/** - * Builds an object structure for the provided namespace path, ensuring that - * names that already exist are not overwritten. For example: - * "a.b.c" -> a = {};a.b={};a.b.c={}; - * Used by goog.provide and goog.exportSymbol. - * @param {string} name name of the object that this file defines. - * @param {*=} opt_object the object to expose at the end of the path. - * @param {Object=} opt_objectToExportTo The object to add the path to; default - * is |goog.global|. - * @private - */ -goog.exportPath_ = function(name, opt_object, opt_objectToExportTo) { - var parts = name.split('.'); - var cur = opt_objectToExportTo || goog.global; - - // Internet Explorer exhibits strange behavior when throwing errors from - // methods externed in this manner. See the testExportSymbolExceptions in - // base_test.html for an example. - if (!(parts[0] in cur) && cur.execScript) { - cur.execScript('var ' + parts[0]); - } - - // Certain browsers cannot parse code in the form for((a in b); c;); - // This pattern is produced by the JSCompiler when it collapses the - // statement above into the conditional loop below. To prevent this from - // happening, use a for-loop and reserve the init logic as below. - - // Parentheses added to eliminate strict JS warning in Firefox. - for (var part; parts.length && (part = parts.shift());) { - if (!parts.length && goog.isDef(opt_object)) { - // last part and we have an object; use it - cur[part] = opt_object; - } else if (cur[part]) { - cur = cur[part]; - } else { - cur = cur[part] = {}; - } - } -}; - - -/** - * Defines a named value. In uncompiled mode, the value is retrieved from - * CLOSURE_DEFINES or CLOSURE_UNCOMPILED_DEFINES if the object is defined and - * has the property specified, and otherwise used the defined defaultValue. - * When compiled the default can be overridden using the compiler - * options or the value set in the CLOSURE_DEFINES object. - * - * @param {string} name The distinguished name to provide. - * @param {string|number|boolean} defaultValue - */ -goog.define = function(name, defaultValue) { - var value = defaultValue; - if (!COMPILED) { - if (goog.global.CLOSURE_UNCOMPILED_DEFINES && - Object.prototype.hasOwnProperty.call( - goog.global.CLOSURE_UNCOMPILED_DEFINES, name)) { - value = goog.global.CLOSURE_UNCOMPILED_DEFINES[name]; - } else if ( - goog.global.CLOSURE_DEFINES && - Object.prototype.hasOwnProperty.call( - goog.global.CLOSURE_DEFINES, name)) { - value = goog.global.CLOSURE_DEFINES[name]; - } - } - goog.exportPath_(name, value); -}; - - -/** - * @define {boolean} DEBUG is provided as a convenience so that debugging code - * that should not be included in a production js_binary can be easily stripped - * by specifying --define goog.DEBUG=false to the JSCompiler. For example, most - * toString() methods should be declared inside an "if (goog.DEBUG)" conditional - * because they are generally used for debugging purposes and it is difficult - * for the JSCompiler to statically determine whether they are used. - */ -goog.define('goog.DEBUG', true); - - -/** - * @define {string} LOCALE defines the locale being used for compilation. It is - * used to select locale specific data to be compiled in js binary. BUILD rule - * can specify this value by "--define goog.LOCALE=<locale_name>" as JSCompiler - * option. - * - * Take into account that the locale code format is important. You should use - * the canonical Unicode format with hyphen as a delimiter. Language must be - * lowercase, Language Script - Capitalized, Region - UPPERCASE. - * There are few examples: pt-BR, en, en-US, sr-Latin-BO, zh-Hans-CN. - * - * See more info about locale codes here: - * http://www.unicode.org/reports/tr35/#Unicode_Language_and_Locale_Identifiers - * - * For language codes you should use values defined by ISO 693-1. See it here - * http://www.w3.org/WAI/ER/IG/ert/iso639.htm. There is only one exception from - * this rule: the Hebrew language. For legacy reasons the old code (iw) should - * be used instead of the new code (he), see http://wiki/Main/IIISynonyms. - */ -goog.define('goog.LOCALE', 'en'); // default to en - - -/** - * @define {boolean} Whether this code is running on trusted sites. - * - * On untrusted sites, several native functions can be defined or overridden by - * external libraries like Prototype, Datejs, and JQuery and setting this flag - * to false forces closure to use its own implementations when possible. - * - * If your JavaScript can be loaded by a third party site and you are wary about - * relying on non-standard implementations, specify - * "--define goog.TRUSTED_SITE=false" to the JSCompiler. - */ -goog.define('goog.TRUSTED_SITE', true); - - -/** - * @define {boolean} Whether a project is expected to be running in strict mode. - * - * This define can be used to trigger alternate implementations compatible with - * running in EcmaScript Strict mode or warn about unavailable functionality. - * @see https://goo.gl/PudQ4y - * - */ -goog.define('goog.STRICT_MODE_COMPATIBLE', false); - - -/** - * @define {boolean} Whether code that calls {@link goog.setTestOnly} should - * be disallowed in the compilation unit. - */ -goog.define('goog.DISALLOW_TEST_ONLY_CODE', COMPILED && !goog.DEBUG); - - -/** - * @define {boolean} Whether to use a Chrome app CSP-compliant method for - * loading scripts via goog.require. @see appendScriptSrcNode_. - */ -goog.define('goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING', false); - - -/** - * Defines a namespace in Closure. - * - * A namespace may only be defined once in a codebase. It may be defined using - * goog.provide() or goog.module(). - * - * The presence of one or more goog.provide() calls in a file indicates - * that the file defines the given objects/namespaces. - * Provided symbols must not be null or undefined. - * - * In addition, goog.provide() creates the object stubs for a namespace - * (for example, goog.provide("goog.foo.bar") will create the object - * goog.foo.bar if it does not already exist). - * - * Build tools also scan for provide/require/module statements - * to discern dependencies, build dependency files (see deps.js), etc. - * - * @see goog.require - * @see goog.module - * @param {string} name Namespace provided by this file in the form - * "goog.package.part". - */ -goog.provide = function(name) { - if (goog.isInModuleLoader_()) { - throw Error('goog.provide can not be used within a goog.module.'); - } - if (!COMPILED) { - // Ensure that the same namespace isn't provided twice. - // A goog.module/goog.provide maps a goog.require to a specific file - if (goog.isProvided_(name)) { - throw Error('Namespace "' + name + '" already declared.'); - } - } - - goog.constructNamespace_(name); -}; - - -/** - * @param {string} name Namespace provided by this file in the form - * "goog.package.part". - * @param {Object=} opt_obj The object to embed in the namespace. - * @private - */ -goog.constructNamespace_ = function(name, opt_obj) { - if (!COMPILED) { - delete goog.implicitNamespaces_[name]; - - var namespace = name; - while ((namespace = namespace.substring(0, namespace.lastIndexOf('.')))) { - if (goog.getObjectByName(namespace)) { - break; - } - goog.implicitNamespaces_[namespace] = true; - } - } - - goog.exportPath_(name, opt_obj); -}; - - -/** - * Module identifier validation regexp. - * Note: This is a conservative check, it is very possible to be more lenient, - * the primary exclusion here is "/" and "\" and a leading ".", these - * restrictions are intended to leave the door open for using goog.require - * with relative file paths rather than module identifiers. - * @private - */ -goog.VALID_MODULE_RE_ = /^[a-zA-Z_$][a-zA-Z0-9._$]*$/; - - -/** - * Defines a module in Closure. - * - * Marks that this file must be loaded as a module and claims the namespace. - * - * A namespace may only be defined once in a codebase. It may be defined using - * goog.provide() or goog.module(). - * - * goog.module() has three requirements: - * - goog.module may not be used in the same file as goog.provide. - * - goog.module must be the first statement in the file. - * - only one goog.module is allowed per file. - * - * When a goog.module annotated file is loaded, it is enclosed in - * a strict function closure. This means that: - * - any variables declared in a goog.module file are private to the file - * (not global), though the compiler is expected to inline the module. - * - The code must obey all the rules of "strict" JavaScript. - * - the file will be marked as "use strict" - * - * NOTE: unlike goog.provide, goog.module does not declare any symbols by - * itself. If declared symbols are desired, use - * goog.module.declareLegacyNamespace(). - * - * - * See the public goog.module proposal: http://goo.gl/Va1hin - * - * @param {string} name Namespace provided by this file in the form - * "goog.package.part", is expected but not required. - */ -goog.module = function(name) { - if (!goog.isString(name) || !name || - name.search(goog.VALID_MODULE_RE_) == -1) { - throw Error('Invalid module identifier'); - } - if (!goog.isInModuleLoader_()) { - throw Error('Module ' + name + ' has been loaded incorrectly.'); - } - if (goog.moduleLoaderState_.moduleName) { - throw Error('goog.module may only be called once per module.'); - } - - // Store the module name for the loader. - goog.moduleLoaderState_.moduleName = name; - if (!COMPILED) { - // Ensure that the same namespace isn't provided twice. - // A goog.module/goog.provide maps a goog.require to a specific file - if (goog.isProvided_(name)) { - throw Error('Namespace "' + name + '" already declared.'); - } - delete goog.implicitNamespaces_[name]; - } -}; - - -/** - * @param {string} name The module identifier. - * @return {?} The module exports for an already loaded module or null. - * - * Note: This is not an alternative to goog.require, it does not - * indicate a hard dependency, instead it is used to indicate - * an optional dependency or to access the exports of a module - * that has already been loaded. - * @suppress {missingProvide} - */ -goog.module.get = function(name) { - return goog.module.getInternal_(name); -}; - - -/** - * @param {string} name The module identifier. - * @return {?} The module exports for an already loaded module or null. - * @private - */ -goog.module.getInternal_ = function(name) { - if (!COMPILED) { - if (goog.isProvided_(name)) { - // goog.require only return a value with-in goog.module files. - return name in goog.loadedModules_ ? goog.loadedModules_[name] : - goog.getObjectByName(name); - } else { - return null; - } - } -}; - - -/** - * @private {?{moduleName: (string|undefined), declareLegacyNamespace:boolean}} - */ -goog.moduleLoaderState_ = null; - - -/** - * @private - * @return {boolean} Whether a goog.module is currently being initialized. - */ -goog.isInModuleLoader_ = function() { - return goog.moduleLoaderState_ != null; -}; - - -/** - * Provide the module's exports as a globally accessible object under the - * module's declared name. This is intended to ease migration to goog.module - * for files that have existing usages. - * @suppress {missingProvide} - */ -goog.module.declareLegacyNamespace = function() { - if (!COMPILED && !goog.isInModuleLoader_()) { - throw new Error( - 'goog.module.declareLegacyNamespace must be called from ' + - 'within a goog.module'); - } - if (!COMPILED && !goog.moduleLoaderState_.moduleName) { - throw Error( - 'goog.module must be called prior to ' + - 'goog.module.declareLegacyNamespace.'); - } - goog.moduleLoaderState_.declareLegacyNamespace = true; -}; - - -/** - * Marks that the current file should only be used for testing, and never for - * live code in production. - * - * In the case of unit tests, the message may optionally be an exact namespace - * for the test (e.g. 'goog.stringTest'). The linter will then ignore the extra - * provide (if not explicitly defined in the code). - * - * @param {string=} opt_message Optional message to add to the error that's - * raised when used in production code. - */ -goog.setTestOnly = function(opt_message) { - if (goog.DISALLOW_TEST_ONLY_CODE) { - opt_message = opt_message || ''; - throw Error( - 'Importing test-only code into non-debug environment' + - (opt_message ? ': ' + opt_message : '.')); - } -}; - - -/** - * Forward declares a symbol. This is an indication to the compiler that the - * symbol may be used in the source yet is not required and may not be provided - * in compilation. - * - * The most common usage of forward declaration is code that takes a type as a - * function parameter but does not need to require it. By forward declaring - * instead of requiring, no hard dependency is made, and (if not required - * elsewhere) the namespace may never be required and thus, not be pulled - * into the JavaScript binary. If it is required elsewhere, it will be type - * checked as normal. - * - * - * @param {string} name The namespace to forward declare in the form of - * "goog.package.part". - */ -goog.forwardDeclare = function(name) {}; - - -/** - * Forward declare type information. Used to assign types to goog.global - * referenced object that would otherwise result in unknown type references - * and thus block property disambiguation. - */ -goog.forwardDeclare('Document'); -goog.forwardDeclare('HTMLScriptElement'); -goog.forwardDeclare('XMLHttpRequest'); - - -if (!COMPILED) { - /** - * Check if the given name has been goog.provided. This will return false for - * names that are available only as implicit namespaces. - * @param {string} name name of the object to look for. - * @return {boolean} Whether the name has been provided. - * @private - */ - goog.isProvided_ = function(name) { - return (name in goog.loadedModules_) || - (!goog.implicitNamespaces_[name] && - goog.isDefAndNotNull(goog.getObjectByName(name))); - }; - - /** - * Namespaces implicitly defined by goog.provide. For example, - * goog.provide('goog.events.Event') implicitly declares that 'goog' and - * 'goog.events' must be namespaces. - * - * @type {!Object<string, (boolean|undefined)>} - * @private - */ - goog.implicitNamespaces_ = {'goog.module': true}; - - // NOTE: We add goog.module as an implicit namespace as goog.module is defined - // here and because the existing module package has not been moved yet out of - // the goog.module namespace. This satisifies both the debug loader and - // ahead-of-time dependency management. -} - - -/** - * Returns an object based on its fully qualified external name. The object - * is not found if null or undefined. If you are using a compilation pass that - * renames property names beware that using this function will not find renamed - * properties. - * - * @param {string} name The fully qualified name. - * @param {Object=} opt_obj The object within which to look; default is - * |goog.global|. - * @return {?} The value (object or primitive) or, if not found, null. - */ -goog.getObjectByName = function(name, opt_obj) { - var parts = name.split('.'); - var cur = opt_obj || goog.global; - for (var part; part = parts.shift();) { - if (goog.isDefAndNotNull(cur[part])) { - cur = cur[part]; - } else { - return null; - } - } - return cur; -}; - - -/** - * Globalizes a whole namespace, such as goog or goog.lang. - * - * @param {!Object} obj The namespace to globalize. - * @param {Object=} opt_global The object to add the properties to. - * @deprecated Properties may be explicitly exported to the global scope, but - * this should no longer be done in bulk. - */ -goog.globalize = function(obj, opt_global) { - var global = opt_global || goog.global; - for (var x in obj) { - global[x] = obj[x]; - } -}; - - -/** - * Adds a dependency from a file to the files it requires. - * @param {string} relPath The path to the js file. - * @param {!Array<string>} provides An array of strings with - * the names of the objects this file provides. - * @param {!Array<string>} requires An array of strings with - * the names of the objects this file requires. - * @param {boolean|!Object<string>=} opt_loadFlags Parameters indicating - * how the file must be loaded. The boolean 'true' is equivalent - * to {'module': 'goog'} for backwards-compatibility. Valid properties - * and values include {'module': 'goog'} and {'lang': 'es6'}. - */ -goog.addDependency = function(relPath, provides, requires, opt_loadFlags) { - if (goog.DEPENDENCIES_ENABLED) { - var provide, require; - var path = relPath.replace(/\\/g, '/'); - var deps = goog.dependencies_; - if (!opt_loadFlags || typeof opt_loadFlags === 'boolean') { - opt_loadFlags = opt_loadFlags ? {'module': 'goog'} : {}; - } - for (var i = 0; provide = provides[i]; i++) { - deps.nameToPath[provide] = path; - deps.loadFlags[path] = opt_loadFlags; - } - for (var j = 0; require = requires[j]; j++) { - if (!(path in deps.requires)) { - deps.requires[path] = {}; - } - deps.requires[path][require] = true; - } - } -}; - - - - -// NOTE(nnaze): The debug DOM loader was included in base.js as an original way -// to do "debug-mode" development. The dependency system can sometimes be -// confusing, as can the debug DOM loader's asynchronous nature. -// -// With the DOM loader, a call to goog.require() is not blocking -- the script -// will not load until some point after the current script. If a namespace is -// needed at runtime, it needs to be defined in a previous script, or loaded via -// require() with its registered dependencies. -// -// User-defined namespaces may need their own deps file. For a reference on -// creating a deps file, see: -// Externally: https://developers.google.com/closure/library/docs/depswriter -// -// Because of legacy clients, the DOM loader can't be easily removed from -// base.js. Work is being done to make it disableable or replaceable for -// different environments (DOM-less JavaScript interpreters like Rhino or V8, -// for example). See bootstrap/ for more information. - - -/** - * @define {boolean} Whether to enable the debug loader. - * - * If enabled, a call to goog.require() will attempt to load the namespace by - * appending a script tag to the DOM (if the namespace has been registered). - * - * If disabled, goog.require() will simply assert that the namespace has been - * provided (and depend on the fact that some outside tool correctly ordered - * the script). - */ -goog.define('goog.ENABLE_DEBUG_LOADER', true); - - -/** - * @param {string} msg - * @private - */ -goog.logToConsole_ = function(msg) { - if (goog.global.console) { - goog.global.console['error'](msg); - } -}; - - -/** - * Implements a system for the dynamic resolution of dependencies that works in - * parallel with the BUILD system. Note that all calls to goog.require will be - * stripped by the JSCompiler when the --process_closure_primitives option is - * used. - * @see goog.provide - * @param {string} name Namespace to include (as was given in goog.provide()) in - * the form "goog.package.part". - * @return {?} If called within a goog.module file, the associated namespace or - * module otherwise null. - */ -goog.require = function(name) { - // If the object already exists we do not need do do anything. - if (!COMPILED) { - if (goog.ENABLE_DEBUG_LOADER && goog.IS_OLD_IE_) { - goog.maybeProcessDeferredDep_(name); - } - - if (goog.isProvided_(name)) { - if (goog.isInModuleLoader_()) { - return goog.module.getInternal_(name); - } else { - return null; - } - } - - if (goog.ENABLE_DEBUG_LOADER) { - var path = goog.getPathFromDeps_(name); - if (path) { - goog.writeScripts_(path); - return null; - } - } - - var errorMessage = 'goog.require could not find: ' + name; - goog.logToConsole_(errorMessage); - - throw Error(errorMessage); - } -}; - - -/** - * Path for included scripts. - * @type {string} - */ -goog.basePath = ''; - - -/** - * A hook for overriding the base path. - * @type {string|undefined} - */ -goog.global.CLOSURE_BASE_PATH; - - -/** - * Whether to write out Closure's deps file. By default, the deps are written. - * @type {boolean|undefined} - */ -goog.global.CLOSURE_NO_DEPS; - - -/** - * A function to import a single script. This is meant to be overridden when - * Closure is being run in non-HTML contexts, such as web workers. It's defined - * in the global scope so that it can be set before base.js is loaded, which - * allows deps.js to be imported properly. - * - * The function is passed the script source, which is a relative URI. It should - * return true if the script was imported, false otherwise. - * @type {(function(string): boolean)|undefined} - */ -goog.global.CLOSURE_IMPORT_SCRIPT; - - -/** - * Null function used for default values of callbacks, etc. - * @return {void} Nothing. - */ -goog.nullFunction = function() {}; - - -/** - * When defining a class Foo with an abstract method bar(), you can do: - * Foo.prototype.bar = goog.abstractMethod - * - * Now if a subclass of Foo fails to override bar(), an error will be thrown - * when bar() is invoked. - * - * Note: This does not take the name of the function to override as an argument - * because that would make it more difficult to obfuscate our JavaScript code. - * - * @type {!Function} - * @throws {Error} when invoked to indicate the method should be overridden. - */ -goog.abstractMethod = function() { - throw Error('unimplemented abstract method'); -}; - - -/** - * Adds a {@code getInstance} static method that always returns the same - * instance object. - * @param {!Function} ctor The constructor for the class to add the static - * method to. - */ -goog.addSingletonGetter = function(ctor) { - ctor.getInstance = function() { - if (ctor.instance_) { - return ctor.instance_; - } - if (goog.DEBUG) { - // NOTE: JSCompiler can't optimize away Array#push. - goog.instantiatedSingletons_[goog.instantiatedSingletons_.length] = ctor; - } - return ctor.instance_ = new ctor; - }; -}; - - -/** - * All singleton classes that have been instantiated, for testing. Don't read - * it directly, use the {@code goog.testing.singleton} module. The compiler - * removes this variable if unused. - * @type {!Array<!Function>} - * @private - */ -goog.instantiatedSingletons_ = []; - - -/** - * @define {boolean} Whether to load goog.modules using {@code eval} when using - * the debug loader. This provides a better debugging experience as the - * source is unmodified and can be edited using Chrome Workspaces or similar. - * However in some environments the use of {@code eval} is banned - * so we provide an alternative. - */ -goog.define('goog.LOAD_MODULE_USING_EVAL', true); - - -/** - * @define {boolean} Whether the exports of goog.modules should be sealed when - * possible. - */ -goog.define('goog.SEAL_MODULE_EXPORTS', goog.DEBUG); - - -/** - * The registry of initialized modules: - * the module identifier to module exports map. - * @private @const {!Object<string, ?>} - */ -goog.loadedModules_ = {}; - - -/** - * True if goog.dependencies_ is available. - * @const {boolean} - */ -goog.DEPENDENCIES_ENABLED = !COMPILED && goog.ENABLE_DEBUG_LOADER; - - -/** - * @define {string} How to decide whether to transpile. Valid values - * are 'always', 'never', and 'detect'. The default ('detect') is to - * use feature detection to determine which language levels need - * transpilation. - */ -// NOTE(user): we could expand this to accept a language level to bypass -// detection: e.g. goog.TRANSPILE == 'es5' would transpile ES6 files but -// would leave ES3 and ES5 files alone. -goog.define('goog.TRANSPILE', 'detect'); - - -/** - * @define {string} Path to the transpiler. Executing the script at this - * path (relative to base.js) should define a function $jscomp.transpile. - */ -goog.define('goog.TRANSPILER', 'transpile.js'); - - -if (goog.DEPENDENCIES_ENABLED) { - /** - * This object is used to keep track of dependencies and other data that is - * used for loading scripts. - * @private - * @type {{ - * loadFlags: !Object<string, !Object<string, string>>, - * nameToPath: !Object<string, string>, - * requires: !Object<string, !Object<string, boolean>>, - * visited: !Object<string, boolean>, - * written: !Object<string, boolean>, - * deferred: !Object<string, string> - * }} - */ - goog.dependencies_ = { - loadFlags: {}, // 1 to 1 - - nameToPath: {}, // 1 to 1 - - requires: {}, // 1 to many - - // Used when resolving dependencies to prevent us from visiting file twice. - visited: {}, - - written: {}, // Used to keep track of script files we have written. - - deferred: {} // Used to track deferred module evaluations in old IEs - }; - - - /** - * Tries to detect whether is in the context of an HTML document. - * @return {boolean} True if it looks like HTML document. - * @private - */ - goog.inHtmlDocument_ = function() { - /** @type {Document} */ - var doc = goog.global.document; - return doc != null && 'write' in doc; // XULDocument misses write. - }; - - - /** - * Tries to detect the base path of base.js script that bootstraps Closure. - * @private - */ - goog.findBasePath_ = function() { - if (goog.isDef(goog.global.CLOSURE_BASE_PATH)) { - goog.basePath = goog.global.CLOSURE_BASE_PATH; - return; - } else if (!goog.inHtmlDocument_()) { - return; - } - /** @type {Document} */ - var doc = goog.global.document; - var scripts = doc.getElementsByTagName('SCRIPT'); - // Search backwards since the current script is in almost all cases the one - // that has base.js. - for (var i = scripts.length - 1; i >= 0; --i) { - var script = /** @type {!HTMLScriptElement} */ (scripts[i]); - var src = script.src; - var qmark = src.lastIndexOf('?'); - var l = qmark == -1 ? src.length : qmark; - if (src.substr(l - 7, 7) == 'base.js') { - goog.basePath = src.substr(0, l - 7); - return; - } - } - }; - - - /** - * Imports a script if, and only if, that script hasn't already been imported. - * (Must be called at execution time) - * @param {string} src Script source. - * @param {string=} opt_sourceText The optionally source text to evaluate - * @private - */ - goog.importScript_ = function(src, opt_sourceText) { - var importScript = - goog.global.CLOSURE_IMPORT_SCRIPT || goog.writeScriptTag_; - if (importScript(src, opt_sourceText)) { - goog.dependencies_.written[src] = true; - } - }; - - - /** - * Whether the browser is IE9 or earlier, which needs special handling - * for deferred modules. - * @const @private {boolean} - */ - goog.IS_OLD_IE_ = - !!(!goog.global.atob && goog.global.document && goog.global.document.all); - - - /** - * Given a URL initiate retrieval and execution of a script that needs - * pre-processing. - * @param {string} src Script source URL. - * @param {boolean} isModule Whether this is a goog.module. - * @param {boolean} needsTranspile Whether this source needs transpilation. - * @private - */ - goog.importProcessedScript_ = function(src, isModule, needsTranspile) { - // In an attempt to keep browsers from timing out loading scripts using - // synchronous XHRs, put each load in its own script block. - var bootstrap = 'goog.retrieveAndExec_("' + src + '", ' + isModule + ', ' + - needsTranspile + ');'; - - goog.importScript_('', bootstrap); - }; - - - /** @private {!Array<string>} */ - goog.queuedModules_ = []; - - - /** - * Return an appropriate module text. Suitable to insert into - * a script tag (that is unescaped). - * @param {string} srcUrl - * @param {string} scriptText - * @return {string} - * @private - */ - goog.wrapModule_ = function(srcUrl, scriptText) { - if (!goog.LOAD_MODULE_USING_EVAL || !goog.isDef(goog.global.JSON)) { - return '' + - 'goog.loadModule(function(exports) {' + - '"use strict";' + scriptText + - '\n' + // terminate any trailing single line comment. - ';return exports' + - '});' + - '\n//# sourceURL=' + srcUrl + '\n'; - } else { - return '' + - 'goog.loadModule(' + - goog.global.JSON.stringify( - scriptText + '\n//# sourceURL=' + srcUrl + '\n') + - ');'; - } - }; - - // On IE9 and earlier, it is necessary to handle - // deferred module loads. In later browsers, the - // code to be evaluated is simply inserted as a script - // block in the correct order. To eval deferred - // code at the right time, we piggy back on goog.require to call - // goog.maybeProcessDeferredDep_. - // - // The goog.requires are used both to bootstrap - // the loading process (when no deps are available) and - // declare that they should be available. - // - // Here we eval the sources, if all the deps are available - // either already eval'd or goog.require'd. This will - // be the case when all the dependencies have already - // been loaded, and the dependent module is loaded. - // - // But this alone isn't sufficient because it is also - // necessary to handle the case where there is no root - // that is not deferred. For that there we register for an event - // and trigger goog.loadQueuedModules_ handle any remaining deferred - // evaluations. - - /** - * Handle any remaining deferred goog.module evals. - * @private - */ - goog.loadQueuedModules_ = function() { - var count = goog.queuedModules_.length; - if (count > 0) { - var queue = goog.queuedModules_; - goog.queuedModules_ = []; - for (var i = 0; i < count; i++) { - var path = queue[i]; - goog.maybeProcessDeferredPath_(path); - } - } - }; - - - /** - * Eval the named module if its dependencies are - * available. - * @param {string} name The module to load. - * @private - */ - goog.maybeProcessDeferredDep_ = function(name) { - if (goog.isDeferredModule_(name) && goog.allDepsAreAvailable_(name)) { - var path = goog.getPathFromDeps_(name); - goog.maybeProcessDeferredPath_(goog.basePath + path); - } - }; - - /** - * @param {string} name The module to check. - * @return {boolean} Whether the name represents a - * module whose evaluation has been deferred. - * @private - */ - goog.isDeferredModule_ = function(name) { - var path = goog.getPathFromDeps_(name); - var loadFlags = path && goog.dependencies_.loadFlags[path] || {}; - if (path && (loadFlags['module'] == 'goog' || - goog.needsTranspile_(loadFlags['lang']))) { - var abspath = goog.basePath + path; - return (abspath) in goog.dependencies_.deferred; - } - return false; - }; - - /** - * @param {string} name The module to check. - * @return {boolean} Whether the name represents a - * module whose declared dependencies have all been loaded - * (eval'd or a deferred module load) - * @private - */ - goog.allDepsAreAvailable_ = function(name) { - var path = goog.getPathFromDeps_(name); - if (path && (path in goog.dependencies_.requires)) { - for (var requireName in goog.dependencies_.requires[path]) { - if (!goog.isProvided_(requireName) && - !goog.isDeferredModule_(requireName)) { - return false; - } - } - } - return true; - }; - - - /** - * @param {string} abspath - * @private - */ - goog.maybeProcessDeferredPath_ = function(abspath) { - if (abspath in goog.dependencies_.deferred) { - var src = goog.dependencies_.deferred[abspath]; - delete goog.dependencies_.deferred[abspath]; - goog.globalEval(src); - } - }; - - - /** - * Load a goog.module from the provided URL. This is not a general purpose - * code loader and does not support late loading code, that is it should only - * be used during page load. This method exists to support unit tests and - * "debug" loaders that would otherwise have inserted script tags. Under the - * hood this needs to use a synchronous XHR and is not recommeneded for - * production code. - * - * The module's goog.requires must have already been satisified; an exception - * will be thrown if this is not the case. This assumption is that no - * "deps.js" file exists, so there is no way to discover and locate the - * module-to-be-loaded's dependencies and no attempt is made to do so. - * - * There should only be one attempt to load a module. If - * "goog.loadModuleFromUrl" is called for an already loaded module, an - * exception will be throw. - * - * @param {string} url The URL from which to attempt to load the goog.module. - */ - goog.loadModuleFromUrl = function(url) { - // Because this executes synchronously, we don't need to do any additional - // bookkeeping. When "goog.loadModule" the namespace will be marked as - // having been provided which is sufficient. - goog.retrieveAndExec_(url, true, false); - }; - - - /** - * @param {function(?):?|string} moduleDef The module definition. - */ - goog.loadModule = function(moduleDef) { - // NOTE: we allow function definitions to be either in the from - // of a string to eval (which keeps the original source intact) or - // in a eval forbidden environment (CSP) we allow a function definition - // which in its body must call {@code goog.module}, and return the exports - // of the module. - var previousState = goog.moduleLoaderState_; - try { - goog.moduleLoaderState_ = { - moduleName: undefined, - declareLegacyNamespace: false - }; - var exports; - if (goog.isFunction(moduleDef)) { - exports = moduleDef.call(goog.global, {}); - } else if (goog.isString(moduleDef)) { - exports = goog.loadModuleFromSource_.call(goog.global, moduleDef); - } else { - throw Error('Invalid module definition'); - } - - var moduleName = goog.moduleLoaderState_.moduleName; - if (!goog.isString(moduleName) || !moduleName) { - throw Error('Invalid module name \"' + moduleName + '\"'); - } - - // Don't seal legacy namespaces as they may be uses as a parent of - // another namespace - if (goog.moduleLoaderState_.declareLegacyNamespace) { - goog.constructNamespace_(moduleName, exports); - } else if (goog.SEAL_MODULE_EXPORTS && Object.seal) { - Object.seal(exports); - } - - goog.loadedModules_[moduleName] = exports; - } finally { - goog.moduleLoaderState_ = previousState; - } - }; - - - /** - * @private @const {function(string):?} - * - * The new type inference warns because this function has no formal - * parameters, but its jsdoc says that it takes one argument. - * (The argument is used via arguments[0], but NTI does not detect this.) - * @suppress {newCheckTypes} - */ - goog.loadModuleFromSource_ = function() { - // NOTE: we avoid declaring parameters or local variables here to avoid - // masking globals or leaking values into the module definition. - 'use strict'; - var exports = {}; - eval(arguments[0]); - return exports; - }; - - - /** - * Writes a new script pointing to {@code src} directly into the DOM. - * - * NOTE: This method is not CSP-compliant. @see goog.appendScriptSrcNode_ for - * the fallback mechanism. - * - * @param {string} src The script URL. - * @private - */ - goog.writeScriptSrcNode_ = function(src) { - goog.global.document.write( - '<script type="text/javascript" src="' + src + '"></' + - 'script>'); - }; - - - /** - * Appends a new script node to the DOM using a CSP-compliant mechanism. This - * method exists as a fallback for document.write (which is not allowed in a - * strict CSP context, e.g., Chrome apps). - * - * NOTE: This method is not analogous to using document.write to insert a - * <script> tag; specifically, the user agent will execute a script added by - * document.write immediately after the current script block finishes - * executing, whereas the DOM-appended script node will not be executed until - * the entire document is parsed and executed. That is to say, this script is - * added to the end of the script execution queue. - * - * The page must not attempt to call goog.required entities until after the - * document has loaded, e.g., in or after the window.onload callback. - * - * @param {string} src The script URL. - * @private - */ - goog.appendScriptSrcNode_ = function(src) { - /** @type {Document} */ - var doc = goog.global.document; - var scriptEl = - /** @type {HTMLScriptElement} */ (doc.createElement('script')); - scriptEl.type = 'text/javascript'; - scriptEl.src = src; - scriptEl.defer = false; - scriptEl.async = false; - doc.head.appendChild(scriptEl); - }; - - - /** - * The default implementation of the import function. Writes a script tag to - * import the script. - * - * @param {string} src The script url. - * @param {string=} opt_sourceText The optionally source text to evaluate - * @return {boolean} True if the script was imported, false otherwise. - * @private - */ - goog.writeScriptTag_ = function(src, opt_sourceText) { - if (goog.inHtmlDocument_()) { - /** @type {!HTMLDocument} */ - var doc = goog.global.document; - - // If the user tries to require a new symbol after document load, - // something has gone terribly wrong. Doing a document.write would - // wipe out the page. This does not apply to the CSP-compliant method - // of writing script tags. - if (!goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING && - doc.readyState == 'complete') { - // Certain test frameworks load base.js multiple times, which tries - // to write deps.js each time. If that happens, just fail silently. - // These frameworks wipe the page between each load of base.js, so this - // is OK. - var isDeps = /\bdeps.js$/.test(src); - if (isDeps) { - return false; - } else { - throw Error('Cannot write "' + src + '" after document load'); - } - } - - if (opt_sourceText === undefined) { - if (!goog.IS_OLD_IE_) { - if (goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING) { - goog.appendScriptSrcNode_(src); - } else { - goog.writeScriptSrcNode_(src); - } - } else { - var state = " onreadystatechange='goog.onScriptLoad_(this, " + - ++goog.lastNonModuleScriptIndex_ + ")' "; - doc.write( - '<script type="text/javascript" src="' + src + '"' + state + - '></' + - 'script>'); - } - } else { - doc.write( - '<script type="text/javascript">' + opt_sourceText + '</' + - 'script>'); - } - return true; - } else { - return false; - } - }; - - - /** - * Determines whether the given language needs to be transpiled. - * @param {string} lang - * @return {boolean} - * @private - */ - goog.needsTranspile_ = function(lang) { - if (goog.TRANSPILE == 'always') { - return true; - } else if (goog.TRANSPILE == 'never') { - return false; - } else if (!goog.transpiledLanguages_) { - goog.transpiledLanguages_ = {'es5': true, 'es6': true, 'es6-impl': true}; - /** @preserveTry */ - try { - // Perform some quick conformance checks, to distinguish - // between browsers that support es5, es6-impl, or es6. - - // Identify ES3-only browsers by their incorrect treatment of commas. - goog.transpiledLanguages_['es5'] = eval('[1,].length!=1'); - - // As browsers mature, features will be moved from the full test - // into the impl test. This must happen before the corresponding - // features are changed in the Closure Compiler's FeatureSet object. - - // Test 1: es6-impl [FF49, Edge 13, Chrome 49] - // (a) let/const keyword, (b) class expressions, (c) Map object, - // (d) iterable arguments, (e) spread operator - var es6implTest = - 'let a={};const X=class{constructor(){}x(z){return new Map([' + - '...arguments]).get(z[0])==3}};return new X().x([a,3])'; - - // Test 2: es6 [FF50 (?), Edge 14 (?), Chrome 50] - // (a) default params (specifically shadowing locals), - // (b) destructuring, (c) block-scoped functions, - // (d) for-of (const), (e) new.target/Reflect.construct - var es6fullTest = - 'class X{constructor(){if(new.target!=String)throw 1;this.x=42}}' + - 'let q=Reflect.construct(X,[],String);if(q.x!=42||!(q instanceof ' + - 'String))throw 1;for(const a of[2,3]){if(a==2)continue;function ' + - 'f(z={a}){let a=0;return z.a}{function f(){return 0;}}return f()' + - '==3}'; - - if (eval('(()=>{"use strict";' + es6implTest + '})()')) { - goog.transpiledLanguages_['es6-impl'] = false; - } - if (eval('(()=>{"use strict";' + es6fullTest + '})()')) { - goog.transpiledLanguages_['es6'] = false; - } - } catch (err) { - } - } - return !!goog.transpiledLanguages_[lang]; - }; - - - /** @private {?Object<string, boolean>} */ - goog.transpiledLanguages_ = null; - - - /** @private {number} */ - goog.lastNonModuleScriptIndex_ = 0; - - - /** - * A readystatechange handler for legacy IE - * @param {!HTMLScriptElement} script - * @param {number} scriptIndex - * @return {boolean} - * @private - */ - goog.onScriptLoad_ = function(script, scriptIndex) { - // for now load the modules when we reach the last script, - // later allow more inter-mingling. - if (script.readyState == 'complete' && - goog.lastNonModuleScriptIndex_ == scriptIndex) { - goog.loadQueuedModules_(); - } - return true; - }; - - /** - * Resolves dependencies based on the dependencies added using addDependency - * and calls importScript_ in the correct order. - * @param {string} pathToLoad The path from which to start discovering - * dependencies. - * @private - */ - goog.writeScripts_ = function(pathToLoad) { - /** @type {!Array<string>} The scripts we need to write this time. */ - var scripts = []; - var seenScript = {}; - var deps = goog.dependencies_; - - /** @param {string} path */ - function visitNode(path) { - if (path in deps.written) { - return; - } - - // We have already visited this one. We can get here if we have cyclic - // dependencies. - if (path in deps.visited) { - return; - } - - deps.visited[path] = true; - - if (path in deps.requires) { - for (var requireName in deps.requires[path]) { - // If the required name is defined, we assume that it was already - // bootstrapped by other means. - if (!goog.isProvided_(requireName)) { - if (requireName in deps.nameToPath) { - visitNode(deps.nameToPath[requireName]); - } else { - throw Error('Undefined nameToPath for ' + requireName); - } - } - } - } - - if (!(path in seenScript)) { - seenScript[path] = true; - scripts.push(path); - } - } - - visitNode(pathToLoad); - - // record that we are going to load all these scripts. - for (var i = 0; i < scripts.length; i++) { - var path = scripts[i]; - goog.dependencies_.written[path] = true; - } - - // If a module is loaded synchronously then we need to - // clear the current inModuleLoader value, and restore it when we are - // done loading the current "requires". - var moduleState = goog.moduleLoaderState_; - goog.moduleLoaderState_ = null; - - for (var i = 0; i < scripts.length; i++) { - var path = scripts[i]; - if (path) { - var loadFlags = deps.loadFlags[path] || {}; - var needsTranspile = goog.needsTranspile_(loadFlags['lang']); - if (loadFlags['module'] == 'goog' || needsTranspile) { - goog.importProcessedScript_( - goog.basePath + path, loadFlags['module'] == 'goog', - needsTranspile); - } else { - goog.importScript_(goog.basePath + path); - } - } else { - goog.moduleLoaderState_ = moduleState; - throw Error('Undefined script input'); - } - } - - // restore the current "module loading state" - goog.moduleLoaderState_ = moduleState; - }; - - - /** - * Looks at the dependency rules and tries to determine the script file that - * fulfills a particular rule. - * @param {string} rule In the form goog.namespace.Class or project.script. - * @return {?string} Url corresponding to the rule, or null. - * @private - */ - goog.getPathFromDeps_ = function(rule) { - if (rule in goog.dependencies_.nameToPath) { - return goog.dependencies_.nameToPath[rule]; - } else { - return null; - } - }; - - goog.findBasePath_(); - - // Allow projects to manage the deps files themselves. - if (!goog.global.CLOSURE_NO_DEPS) { - goog.importScript_(goog.basePath + 'deps.js'); - } -} - - -/** - * Normalize a file path by removing redundant ".." and extraneous "." file - * path components. - * @param {string} path - * @return {string} - * @private - */ -goog.normalizePath_ = function(path) { - var components = path.split('/'); - var i = 0; - while (i < components.length) { - if (components[i] == '.') { - components.splice(i, 1); - } else if ( - i && components[i] == '..' && components[i - 1] && - components[i - 1] != '..') { - components.splice(--i, 2); - } else { - i++; - } - } - return components.join('/'); -}; - - -/** - * Loads file by synchronous XHR. Should not be used in production environments. - * @param {string} src Source URL. - * @return {?string} File contents, or null if load failed. - * @private - */ -goog.loadFileSync_ = function(src) { - if (goog.global.CLOSURE_LOAD_FILE_SYNC) { - return goog.global.CLOSURE_LOAD_FILE_SYNC(src); - } else { - try { - /** @type {XMLHttpRequest} */ - var xhr = new goog.global['XMLHttpRequest'](); - xhr.open('get', src, false); - xhr.send(); - // NOTE: Successful http: requests have a status of 200, but successful - // file: requests may have a status of zero. Any other status, or a - // thrown exception (particularly in case of file: requests) indicates - // some sort of error, which we treat as a missing or unavailable file. - return xhr.status == 0 || xhr.status == 200 ? xhr.responseText : null; - } catch (err) { - // No need to rethrow or log, since errors should show up on their own. - return null; - } - } -}; - - -/** - * Retrieve and execute a script that needs some sort of wrapping. - * @param {string} src Script source URL. - * @param {boolean} isModule Whether to load as a module. - * @param {boolean} needsTranspile Whether to transpile down to ES3. - * @private - */ -goog.retrieveAndExec_ = function(src, isModule, needsTranspile) { - if (!COMPILED) { - // The full but non-canonicalized URL for later use. - var originalPath = src; - // Canonicalize the path, removing any /./ or /../ since Chrome's debugging - // console doesn't auto-canonicalize XHR loads as it does <script> srcs. - src = goog.normalizePath_(src); - - var importScript = - goog.global.CLOSURE_IMPORT_SCRIPT || goog.writeScriptTag_; - - var scriptText = goog.loadFileSync_(src); - if (scriptText == null) { - throw new Error('Load of "' + src + '" failed'); - } - - if (needsTranspile) { - scriptText = goog.transpile_.call(goog.global, scriptText, src); - } - - if (isModule) { - scriptText = goog.wrapModule_(src, scriptText); - } else { - scriptText += '\n//# sourceURL=' + src; - } - var isOldIE = goog.IS_OLD_IE_; - if (isOldIE) { - goog.dependencies_.deferred[originalPath] = scriptText; - goog.queuedModules_.push(originalPath); - } else { - importScript(src, scriptText); - } - } -}; - - -/** - * Lazily retrieves the transpiler and applies it to the source. - * @param {string} code JS code. - * @param {string} path Path to the code. - * @return {string} The transpiled code. - * @private - */ -goog.transpile_ = function(code, path) { - var jscomp = goog.global['$jscomp']; - if (!jscomp) { - goog.global['$jscomp'] = jscomp = {}; - } - var transpile = jscomp.transpile; - if (!transpile) { - var transpilerPath = goog.basePath + goog.TRANSPILER; - var transpilerCode = goog.loadFileSync_(transpilerPath); - if (transpilerCode) { - // This must be executed synchronously, since by the time we know we - // need it, we're about to load and write the ES6 code synchronously, - // so a normal script-tag load will be too slow. - eval(transpilerCode + '\n//# sourceURL=' + transpilerPath); - // Note: transpile.js reassigns goog.global['$jscomp'] so pull it again. - jscomp = goog.global['$jscomp']; - transpile = jscomp.transpile; - } - } - if (!transpile) { - // The transpiler is an optional component. If it's not available then - // replace it with a pass-through function that simply logs. - var suffix = ' requires transpilation but no transpiler was found.'; - transpile = jscomp.transpile = function(code, path) { - // TODO(user): figure out some way to get this error to show up - // in test results, noting that the failure may occur in many - // different ways, including in loadModule() before the test - // runner even comes up. - goog.logToConsole_(path + suffix); - return code; - }; - } - // Note: any transpilation errors/warnings will be logged to the console. - return transpile(code, path); -}; - - -//============================================================================== -// Language Enhancements -//============================================================================== - - -/** - * This is a "fixed" version of the typeof operator. It differs from the typeof - * operator in such a way that null returns 'null' and arrays return 'array'. - * @param {?} value The value to get the type of. - * @return {string} The name of the type. - */ -goog.typeOf = function(value) { - var s = typeof value; - if (s == 'object') { - if (value) { - // Check these first, so we can avoid calling Object.prototype.toString if - // possible. - // - // IE improperly marshals typeof across execution contexts, but a - // cross-context object will still return false for "instanceof Object". - if (value instanceof Array) { - return 'array'; - } else if (value instanceof Object) { - return s; - } - - // HACK: In order to use an Object prototype method on the arbitrary - // value, the compiler requires the value be cast to type Object, - // even though the ECMA spec explicitly allows it. - var className = Object.prototype.toString.call( - /** @type {!Object} */ (value)); - // In Firefox 3.6, attempting to access iframe window objects' length - // property throws an NS_ERROR_FAILURE, so we need to special-case it - // here. - if (className == '[object Window]') { - return 'object'; - } - - // We cannot always use constructor == Array or instanceof Array because - // different frames have different Array objects. In IE6, if the iframe - // where the array was created is destroyed, the array loses its - // prototype. Then dereferencing val.splice here throws an exception, so - // we can't use goog.isFunction. Calling typeof directly returns 'unknown' - // so that will work. In this case, this function will return false and - // most array functions will still work because the array is still - // array-like (supports length and []) even though it has lost its - // prototype. - // Mark Miller noticed that Object.prototype.toString - // allows access to the unforgeable [[Class]] property. - // 15.2.4.2 Object.prototype.toString ( ) - // When the toString method is called, the following steps are taken: - // 1. Get the [[Class]] property of this object. - // 2. Compute a string value by concatenating the three strings - // "[object ", Result(1), and "]". - // 3. Return Result(2). - // and this behavior survives the destruction of the execution context. - if ((className == '[object Array]' || - // In IE all non value types are wrapped as objects across window - // boundaries (not iframe though) so we have to do object detection - // for this edge case. - typeof value.length == 'number' && - typeof value.splice != 'undefined' && - typeof value.propertyIsEnumerable != 'undefined' && - !value.propertyIsEnumerable('splice') - - )) { - return 'array'; - } - // HACK: There is still an array case that fails. - // function ArrayImpostor() {} - // ArrayImpostor.prototype = []; - // var impostor = new ArrayImpostor; - // this can be fixed by getting rid of the fast path - // (value instanceof Array) and solely relying on - // (value && Object.prototype.toString.vall(value) === '[object Array]') - // but that would require many more function calls and is not warranted - // unless closure code is receiving objects from untrusted sources. - - // IE in cross-window calls does not correctly marshal the function type - // (it appears just as an object) so we cannot use just typeof val == - // 'function'. However, if the object has a call property, it is a - // function. - if ((className == '[object Function]' || - typeof value.call != 'undefined' && - typeof value.propertyIsEnumerable != 'undefined' && - !value.propertyIsEnumerable('call'))) { - return 'function'; - } - - } else { - return 'null'; - } - - } else if (s == 'function' && typeof value.call == 'undefined') { - // In Safari typeof nodeList returns 'function', and on Firefox typeof - // behaves similarly for HTML{Applet,Embed,Object}, Elements and RegExps. We - // would like to return object for those and we can detect an invalid - // function by making sure that the function object has a call method. - return 'object'; - } - return s; -}; - - -/** - * Returns true if the specified value is null. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is null. - */ -goog.isNull = function(val) { - return val === null; -}; - - -/** - * Returns true if the specified value is defined and not null. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is defined and not null. - */ -goog.isDefAndNotNull = function(val) { - // Note that undefined == null. - return val != null; -}; - - -/** - * Returns true if the specified value is an array. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is an array. - */ -goog.isArray = function(val) { - return goog.typeOf(val) == 'array'; -}; - - -/** - * Returns true if the object looks like an array. To qualify as array like - * the value needs to be either a NodeList or an object with a Number length - * property. As a special case, a function value is not array like, because its - * length property is fixed to correspond to the number of expected arguments. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is an array. - */ -goog.isArrayLike = function(val) { - var type = goog.typeOf(val); - // We do not use goog.isObject here in order to exclude function values. - return type == 'array' || type == 'object' && typeof val.length == 'number'; -}; - - -/** - * Returns true if the object looks like a Date. To qualify as Date-like the - * value needs to be an object and have a getFullYear() function. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is a like a Date. - */ -goog.isDateLike = function(val) { - return goog.isObject(val) && typeof val.getFullYear == 'function'; -}; - - -/** - * Returns true if the specified value is a string. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is a string. - */ -goog.isString = function(val) { - return typeof val == 'string'; -}; - - -/** - * Returns true if the specified value is a boolean. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is boolean. - */ -goog.isBoolean = function(val) { - return typeof val == 'boolean'; -}; - - -/** - * Returns true if the specified value is a number. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is a number. - */ -goog.isNumber = function(val) { - return typeof val == 'number'; -}; - - -/** - * Returns true if the specified value is a function. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is a function. - */ -goog.isFunction = function(val) { - return goog.typeOf(val) == 'function'; -}; - - -/** - * Returns true if the specified value is an object. This includes arrays and - * functions. - * @param {?} val Variable to test. - * @return {boolean} Whether variable is an object. - */ -goog.isObject = function(val) { - var type = typeof val; - return type == 'object' && val != null || type == 'function'; - // return Object(val) === val also works, but is slower, especially if val is - // not an object. -}; - - -/** - * Gets a unique ID for an object. This mutates the object so that further calls - * with the same object as a parameter returns the same value. The unique ID is - * guaranteed to be unique across the current session amongst objects that are - * passed into {@code getUid}. There is no guarantee that the ID is unique or - * consistent across sessions. It is unsafe to generate unique ID for function - * prototypes. - * - * @param {Object} obj The object to get the unique ID for. - * @return {number} The unique ID for the object. - */ -goog.getUid = function(obj) { - // TODO(arv): Make the type stricter, do not accept null. - - // In Opera window.hasOwnProperty exists but always returns false so we avoid - // using it. As a consequence the unique ID generated for BaseClass.prototype - // and SubClass.prototype will be the same. - return obj[goog.UID_PROPERTY_] || - (obj[goog.UID_PROPERTY_] = ++goog.uidCounter_); -}; - - -/** - * Whether the given object is already assigned a unique ID. - * - * This does not modify the object. - * - * @param {!Object} obj The object to check. - * @return {boolean} Whether there is an assigned unique id for the object. - */ -goog.hasUid = function(obj) { - return !!obj[goog.UID_PROPERTY_]; -}; - - -/** - * Removes the unique ID from an object. This is useful if the object was - * previously mutated using {@code goog.getUid} in which case the mutation is - * undone. - * @param {Object} obj The object to remove the unique ID field from. - */ -goog.removeUid = function(obj) { - // TODO(arv): Make the type stricter, do not accept null. - - // In IE, DOM nodes are not instances of Object and throw an exception if we - // try to delete. Instead we try to use removeAttribute. - if (obj !== null && 'removeAttribute' in obj) { - obj.removeAttribute(goog.UID_PROPERTY_); - } - /** @preserveTry */ - try { - delete obj[goog.UID_PROPERTY_]; - } catch (ex) { - } -}; - - -/** - * Name for unique ID property. Initialized in a way to help avoid collisions - * with other closure JavaScript on the same page. - * @type {string} - * @private - */ -goog.UID_PROPERTY_ = 'closure_uid_' + ((Math.random() * 1e9) >>> 0); - - -/** - * Counter for UID. - * @type {number} - * @private - */ -goog.uidCounter_ = 0; - - -/** - * Adds a hash code field to an object. The hash code is unique for the - * given object. - * @param {Object} obj The object to get the hash code for. - * @return {number} The hash code for the object. - * @deprecated Use goog.getUid instead. - */ -goog.getHashCode = goog.getUid; - - -/** - * Removes the hash code field from an object. - * @param {Object} obj The object to remove the field from. - * @deprecated Use goog.removeUid instead. - */ -goog.removeHashCode = goog.removeUid; - - -/** - * Clones a value. The input may be an Object, Array, or basic type. Objects and - * arrays will be cloned recursively. - * - * WARNINGS: - * <code>goog.cloneObject</code> does not detect reference loops. Objects that - * refer to themselves will cause infinite recursion. - * - * <code>goog.cloneObject</code> is unaware of unique identifiers, and copies - * UIDs created by <code>getUid</code> into cloned results. - * - * @param {*} obj The value to clone. - * @return {*} A clone of the input value. - * @deprecated goog.cloneObject is unsafe. Prefer the goog.object methods. - */ -goog.cloneObject = function(obj) { - var type = goog.typeOf(obj); - if (type == 'object' || type == 'array') { - if (obj.clone) { - return obj.clone(); - } - var clone = type == 'array' ? [] : {}; - for (var key in obj) { - clone[key] = goog.cloneObject(obj[key]); - } - return clone; - } - - return obj; -}; - - -/** - * A native implementation of goog.bind. - * @param {Function} fn A function to partially apply. - * @param {Object|undefined} selfObj Specifies the object which this should - * point to when the function is run. - * @param {...*} var_args Additional arguments that are partially applied to the - * function. - * @return {!Function} A partially-applied form of the function bind() was - * invoked as a method of. - * @private - * @suppress {deprecated} The compiler thinks that Function.prototype.bind is - * deprecated because some people have declared a pure-JS version. - * Only the pure-JS version is truly deprecated. - */ -goog.bindNative_ = function(fn, selfObj, var_args) { - return /** @type {!Function} */ (fn.call.apply(fn.bind, arguments)); -}; - - -/** - * A pure-JS implementation of goog.bind. - * @param {Function} fn A function to partially apply. - * @param {Object|undefined} selfObj Specifies the object which this should - * point to when the function is run. - * @param {...*} var_args Additional arguments that are partially applied to the - * function. - * @return {!Function} A partially-applied form of the function bind() was - * invoked as a method of. - * @private - */ -goog.bindJs_ = function(fn, selfObj, var_args) { - if (!fn) { - throw new Error(); - } - - if (arguments.length > 2) { - var boundArgs = Array.prototype.slice.call(arguments, 2); - return function() { - // Prepend the bound arguments to the current arguments. - var newArgs = Array.prototype.slice.call(arguments); - Array.prototype.unshift.apply(newArgs, boundArgs); - return fn.apply(selfObj, newArgs); - }; - - } else { - return function() { return fn.apply(selfObj, arguments); }; - } -}; - - -/** - * Partially applies this function to a particular 'this object' and zero or - * more arguments. The result is a new function with some arguments of the first - * function pre-filled and the value of this 'pre-specified'. - * - * Remaining arguments specified at call-time are appended to the pre-specified - * ones. - * - * Also see: {@link #partial}. - * - * Usage: - * <pre>var barMethBound = goog.bind(myFunction, myObj, 'arg1', 'arg2'); - * barMethBound('arg3', 'arg4');</pre> - * - * @param {?function(this:T, ...)} fn A function to partially apply. - * @param {T} selfObj Specifies the object which this should point to when the - * function is run. - * @param {...*} var_args Additional arguments that are partially applied to the - * function. - * @return {!Function} A partially-applied form of the function goog.bind() was - * invoked as a method of. - * @template T - * @suppress {deprecated} See above. - */ -goog.bind = function(fn, selfObj, var_args) { - // TODO(nicksantos): narrow the type signature. - if (Function.prototype.bind && - // NOTE(nicksantos): Somebody pulled base.js into the default Chrome - // extension environment. This means that for Chrome extensions, they get - // the implementation of Function.prototype.bind that calls goog.bind - // instead of the native one. Even worse, we don't want to introduce a - // circular dependency between goog.bind and Function.prototype.bind, so - // we have to hack this to make sure it works correctly. - Function.prototype.bind.toString().indexOf('native code') != -1) { - goog.bind = goog.bindNative_; - } else { - goog.bind = goog.bindJs_; - } - return goog.bind.apply(null, arguments); -}; - - -/** - * Like goog.bind(), except that a 'this object' is not required. Useful when - * the target function is already bound. - * - * Usage: - * var g = goog.partial(f, arg1, arg2); - * g(arg3, arg4); - * - * @param {Function} fn A function to partially apply. - * @param {...*} var_args Additional arguments that are partially applied to fn. - * @return {!Function} A partially-applied form of the function goog.partial() - * was invoked as a method of. - */ -goog.partial = function(fn, var_args) { - var args = Array.prototype.slice.call(arguments, 1); - return function() { - // Clone the array (with slice()) and append additional arguments - // to the existing arguments. - var newArgs = args.slice(); - newArgs.push.apply(newArgs, arguments); - return fn.apply(this, newArgs); - }; -}; - - -/** - * Copies all the members of a source object to a target object. This method - * does not work on all browsers for all objects that contain keys such as - * toString or hasOwnProperty. Use goog.object.extend for this purpose. - * @param {Object} target Target. - * @param {Object} source Source. - */ -goog.mixin = function(target, source) { - for (var x in source) { - target[x] = source[x]; - } - - // For IE7 or lower, the for-in-loop does not contain any properties that are - // not enumerable on the prototype object (for example, isPrototypeOf from - // Object.prototype) but also it will not include 'replace' on objects that - // extend String and change 'replace' (not that it is common for anyone to - // extend anything except Object). -}; - - -/** - * @return {number} An integer value representing the number of milliseconds - * between midnight, January 1, 1970 and the current time. - */ -goog.now = (goog.TRUSTED_SITE && Date.now) || (function() { - // Unary plus operator converts its operand to a number which in - // the case of - // a date is done by calling getTime(). - return +new Date(); - }); - - -/** - * Evals JavaScript in the global scope. In IE this uses execScript, other - * browsers use goog.global.eval. If goog.global.eval does not evaluate in the - * global scope (for example, in Safari), appends a script tag instead. - * Throws an exception if neither execScript or eval is defined. - * @param {string} script JavaScript string. - */ -goog.globalEval = function(script) { - if (goog.global.execScript) { - goog.global.execScript(script, 'JavaScript'); - } else if (goog.global.eval) { - // Test to see if eval works - if (goog.evalWorksForGlobals_ == null) { - goog.global.eval('var _evalTest_ = 1;'); - if (typeof goog.global['_evalTest_'] != 'undefined') { - try { - delete goog.global['_evalTest_']; - } catch (ignore) { - // Microsoft edge fails the deletion above in strict mode. - } - goog.evalWorksForGlobals_ = true; - } else { - goog.evalWorksForGlobals_ = false; - } - } - - if (goog.evalWorksForGlobals_) { - goog.global.eval(script); - } else { - /** @type {Document} */ - var doc = goog.global.document; - var scriptElt = - /** @type {!HTMLScriptElement} */ (doc.createElement('SCRIPT')); - scriptElt.type = 'text/javascript'; - scriptElt.defer = false; - // Note(user): can't use .innerHTML since "t('<test>')" will fail and - // .text doesn't work in Safari 2. Therefore we append a text node. - scriptElt.appendChild(doc.createTextNode(script)); - doc.body.appendChild(scriptElt); - doc.body.removeChild(scriptElt); - } - } else { - throw Error('goog.globalEval not available'); - } -}; - - -/** - * Indicates whether or not we can call 'eval' directly to eval code in the - * global scope. Set to a Boolean by the first call to goog.globalEval (which - * empirically tests whether eval works for globals). @see goog.globalEval - * @type {?boolean} - * @private - */ -goog.evalWorksForGlobals_ = null; - - -/** - * Optional map of CSS class names to obfuscated names used with - * goog.getCssName(). - * @private {!Object<string, string>|undefined} - * @see goog.setCssNameMapping - */ -goog.cssNameMapping_; - - -/** - * Optional obfuscation style for CSS class names. Should be set to either - * 'BY_WHOLE' or 'BY_PART' if defined. - * @type {string|undefined} - * @private - * @see goog.setCssNameMapping - */ -goog.cssNameMappingStyle_; - - -/** - * Handles strings that are intended to be used as CSS class names. - * - * This function works in tandem with @see goog.setCssNameMapping. - * - * Without any mapping set, the arguments are simple joined with a hyphen and - * passed through unaltered. - * - * When there is a mapping, there are two possible styles in which these - * mappings are used. In the BY_PART style, each part (i.e. in between hyphens) - * of the passed in css name is rewritten according to the map. In the BY_WHOLE - * style, the full css name is looked up in the map directly. If a rewrite is - * not specified by the map, the compiler will output a warning. - * - * When the mapping is passed to the compiler, it will replace calls to - * goog.getCssName with the strings from the mapping, e.g. - * var x = goog.getCssName('foo'); - * var y = goog.getCssName(this.baseClass, 'active'); - * becomes: - * var x = 'foo'; - * var y = this.baseClass + '-active'; - * - * If one argument is passed it will be processed, if two are passed only the - * modifier will be processed, as it is assumed the first argument was generated - * as a result of calling goog.getCssName. - * - * @param {string} className The class name. - * @param {string=} opt_modifier A modifier to be appended to the class name. - * @return {string} The class name or the concatenation of the class name and - * the modifier. - */ -goog.getCssName = function(className, opt_modifier) { - var getMapping = function(cssName) { - return goog.cssNameMapping_[cssName] || cssName; - }; - - var renameByParts = function(cssName) { - // Remap all the parts individually. - var parts = cssName.split('-'); - var mapped = []; - for (var i = 0; i < parts.length; i++) { - mapped.push(getMapping(parts[i])); - } - return mapped.join('-'); - }; - - var rename; - if (goog.cssNameMapping_) { - rename = - goog.cssNameMappingStyle_ == 'BY_WHOLE' ? getMapping : renameByParts; - } else { - rename = function(a) { return a; }; - } - - if (opt_modifier) { - return className + '-' + rename(opt_modifier); - } else { - return rename(className); - } -}; - - -/** - * Sets the map to check when returning a value from goog.getCssName(). Example: - * <pre> - * goog.setCssNameMapping({ - * "goog": "a", - * "disabled": "b", - * }); - * - * var x = goog.getCssName('goog'); - * // The following evaluates to: "a a-b". - * goog.getCssName('goog') + ' ' + goog.getCssName(x, 'disabled') - * </pre> - * When declared as a map of string literals to string literals, the JSCompiler - * will replace all calls to goog.getCssName() using the supplied map if the - * --process_closure_primitives flag is set. - * - * @param {!Object} mapping A map of strings to strings where keys are possible - * arguments to goog.getCssName() and values are the corresponding values - * that should be returned. - * @param {string=} opt_style The style of css name mapping. There are two valid - * options: 'BY_PART', and 'BY_WHOLE'. - * @see goog.getCssName for a description. - */ -goog.setCssNameMapping = function(mapping, opt_style) { - goog.cssNameMapping_ = mapping; - goog.cssNameMappingStyle_ = opt_style; -}; - - -/** - * To use CSS renaming in compiled mode, one of the input files should have a - * call to goog.setCssNameMapping() with an object literal that the JSCompiler - * can extract and use to replace all calls to goog.getCssName(). In uncompiled - * mode, JavaScript code should be loaded before this base.js file that declares - * a global variable, CLOSURE_CSS_NAME_MAPPING, which is used below. This is - * to ensure that the mapping is loaded before any calls to goog.getCssName() - * are made in uncompiled mode. - * - * A hook for overriding the CSS name mapping. - * @type {!Object<string, string>|undefined} - */ -goog.global.CLOSURE_CSS_NAME_MAPPING; - - -if (!COMPILED && goog.global.CLOSURE_CSS_NAME_MAPPING) { - // This does not call goog.setCssNameMapping() because the JSCompiler - // requires that goog.setCssNameMapping() be called with an object literal. - goog.cssNameMapping_ = goog.global.CLOSURE_CSS_NAME_MAPPING; -} - - -/** - * Gets a localized message. - * - * This function is a compiler primitive. If you give the compiler a localized - * message bundle, it will replace the string at compile-time with a localized - * version, and expand goog.getMsg call to a concatenated string. - * - * Messages must be initialized in the form: - * <code> - * var MSG_NAME = goog.getMsg('Hello {$placeholder}', {'placeholder': 'world'}); - * </code> - * - * This function produces a string which should be treated as plain text. Use - * {@link goog.html.SafeHtmlFormatter} in conjunction with goog.getMsg to - * produce SafeHtml. - * - * @param {string} str Translatable string, places holders in the form {$foo}. - * @param {Object<string, string>=} opt_values Maps place holder name to value. - * @return {string} message with placeholders filled. - */ -goog.getMsg = function(str, opt_values) { - if (opt_values) { - str = str.replace(/\{\$([^}]+)}/g, function(match, key) { - return (opt_values != null && key in opt_values) ? opt_values[key] : - match; - }); - } - return str; -}; - - -/** - * Gets a localized message. If the message does not have a translation, gives a - * fallback message. - * - * This is useful when introducing a new message that has not yet been - * translated into all languages. - * - * This function is a compiler primitive. Must be used in the form: - * <code>var x = goog.getMsgWithFallback(MSG_A, MSG_B);</code> - * where MSG_A and MSG_B were initialized with goog.getMsg. - * - * @param {string} a The preferred message. - * @param {string} b The fallback message. - * @return {string} The best translated message. - */ -goog.getMsgWithFallback = function(a, b) { - return a; -}; - - -/** - * Exposes an unobfuscated global namespace path for the given object. - * Note that fields of the exported object *will* be obfuscated, unless they are - * exported in turn via this function or goog.exportProperty. - * - * Also handy for making public items that are defined in anonymous closures. - * - * ex. goog.exportSymbol('public.path.Foo', Foo); - * - * ex. goog.exportSymbol('public.path.Foo.staticFunction', Foo.staticFunction); - * public.path.Foo.staticFunction(); - * - * ex. goog.exportSymbol('public.path.Foo.prototype.myMethod', - * Foo.prototype.myMethod); - * new public.path.Foo().myMethod(); - * - * @param {string} publicPath Unobfuscated name to export. - * @param {*} object Object the name should point to. - * @param {Object=} opt_objectToExportTo The object to add the path to; default - * is goog.global. - */ -goog.exportSymbol = function(publicPath, object, opt_objectToExportTo) { - goog.exportPath_(publicPath, object, opt_objectToExportTo); -}; - - -/** - * Exports a property unobfuscated into the object's namespace. - * ex. goog.exportProperty(Foo, 'staticFunction', Foo.staticFunction); - * ex. goog.exportProperty(Foo.prototype, 'myMethod', Foo.prototype.myMethod); - * @param {Object} object Object whose static property is being exported. - * @param {string} publicName Unobfuscated name to export. - * @param {*} symbol Object the name should point to. - */ -goog.exportProperty = function(object, publicName, symbol) { - object[publicName] = symbol; -}; - - -/** - * Inherit the prototype methods from one constructor into another. - * - * Usage: - * <pre> - * function ParentClass(a, b) { } - * ParentClass.prototype.foo = function(a) { }; - * - * function ChildClass(a, b, c) { - * ChildClass.base(this, 'constructor', a, b); - * } - * goog.inherits(ChildClass, ParentClass); - * - * var child = new ChildClass('a', 'b', 'see'); - * child.foo(); // This works. - * </pre> - * - * @param {!Function} childCtor Child class. - * @param {!Function} parentCtor Parent class. - */ -goog.inherits = function(childCtor, parentCtor) { - /** @constructor */ - function tempCtor() {} - tempCtor.prototype = parentCtor.prototype; - childCtor.superClass_ = parentCtor.prototype; - childCtor.prototype = new tempCtor(); - /** @override */ - childCtor.prototype.constructor = childCtor; - - /** - * Calls superclass constructor/method. - * - * This function is only available if you use goog.inherits to - * express inheritance relationships between classes. - * - * NOTE: This is a replacement for goog.base and for superClass_ - * property defined in childCtor. - * - * @param {!Object} me Should always be "this". - * @param {string} methodName The method name to call. Calling - * superclass constructor can be done with the special string - * 'constructor'. - * @param {...*} var_args The arguments to pass to superclass - * method/constructor. - * @return {*} The return value of the superclass method/constructor. - */ - childCtor.base = function(me, methodName, var_args) { - // Copying using loop to avoid deop due to passing arguments object to - // function. This is faster in many JS engines as of late 2014. - var args = new Array(arguments.length - 2); - for (var i = 2; i < arguments.length; i++) { - args[i - 2] = arguments[i]; - } - return parentCtor.prototype[methodName].apply(me, args); - }; -}; - - -/** - * Call up to the superclass. - * - * If this is called from a constructor, then this calls the superclass - * constructor with arguments 1-N. - * - * If this is called from a prototype method, then you must pass the name of the - * method as the second argument to this function. If you do not, you will get a - * runtime error. This calls the superclass' method with arguments 2-N. - * - * This function only works if you use goog.inherits to express inheritance - * relationships between your classes. - * - * This function is a compiler primitive. At compile-time, the compiler will do - * macro expansion to remove a lot of the extra overhead that this function - * introduces. The compiler will also enforce a lot of the assumptions that this - * function makes, and treat it as a compiler error if you break them. - * - * @param {!Object} me Should always be "this". - * @param {*=} opt_methodName The method name if calling a super method. - * @param {...*} var_args The rest of the arguments. - * @return {*} The return value of the superclass method. - * @suppress {es5Strict} This method can not be used in strict mode, but - * all Closure Library consumers must depend on this file. - */ -goog.base = function(me, opt_methodName, var_args) { - var caller = arguments.callee.caller; - - if (goog.STRICT_MODE_COMPATIBLE || (goog.DEBUG && !caller)) { - throw Error( - 'arguments.caller not defined. goog.base() cannot be used ' + - 'with strict mode code. See ' + - 'http://www.ecma-international.org/ecma-262/5.1/#sec-C'); - } - - if (caller.superClass_) { - // Copying using loop to avoid deop due to passing arguments object to - // function. This is faster in many JS engines as of late 2014. - var ctorArgs = new Array(arguments.length - 1); - for (var i = 1; i < arguments.length; i++) { - ctorArgs[i - 1] = arguments[i]; - } - // This is a constructor. Call the superclass constructor. - return caller.superClass_.constructor.apply(me, ctorArgs); - } - - // Copying using loop to avoid deop due to passing arguments object to - // function. This is faster in many JS engines as of late 2014. - var args = new Array(arguments.length - 2); - for (var i = 2; i < arguments.length; i++) { - args[i - 2] = arguments[i]; - } - var foundCaller = false; - for (var ctor = me.constructor; ctor; - ctor = ctor.superClass_ && ctor.superClass_.constructor) { - if (ctor.prototype[opt_methodName] === caller) { - foundCaller = true; - } else if (foundCaller) { - return ctor.prototype[opt_methodName].apply(me, args); - } - } - - // If we did not find the caller in the prototype chain, then one of two - // things happened: - // 1) The caller is an instance method. - // 2) This method was not called by the right caller. - if (me[opt_methodName] === caller) { - return me.constructor.prototype[opt_methodName].apply(me, args); - } else { - throw Error( - 'goog.base called from a method of one name ' + - 'to a method of a different name'); - } -}; - - -/** - * Allow for aliasing within scope functions. This function exists for - * uncompiled code - in compiled code the calls will be inlined and the aliases - * applied. In uncompiled code the function is simply run since the aliases as - * written are valid JavaScript. - * - * - * @param {function()} fn Function to call. This function can contain aliases - * to namespaces (e.g. "var dom = goog.dom") or classes - * (e.g. "var Timer = goog.Timer"). - */ -goog.scope = function(fn) { - if (goog.isInModuleLoader_()) { - throw Error('goog.scope is not supported within a goog.module.'); - } - fn.call(goog.global); -}; - - -/* - * To support uncompiled, strict mode bundles that use eval to divide source - * like so: - * eval('someSource;//# sourceUrl sourcefile.js'); - * We need to export the globally defined symbols "goog" and "COMPILED". - * Exporting "goog" breaks the compiler optimizations, so we required that - * be defined externally. - * NOTE: We don't use goog.exportSymbol here because we don't want to trigger - * extern generation when that compiler option is enabled. - */ -if (!COMPILED) { - goog.global['COMPILED'] = COMPILED; -} - - -//============================================================================== -// goog.defineClass implementation -//============================================================================== - - -/** - * Creates a restricted form of a Closure "class": - * - from the compiler's perspective, the instance returned from the - * constructor is sealed (no new properties may be added). This enables - * better checks. - * - the compiler will rewrite this definition to a form that is optimal - * for type checking and optimization (initially this will be a more - * traditional form). - * - * @param {Function} superClass The superclass, Object or null. - * @param {goog.defineClass.ClassDescriptor} def - * An object literal describing - * the class. It may have the following properties: - * "constructor": the constructor function - * "statics": an object literal containing methods to add to the constructor - * as "static" methods or a function that will receive the constructor - * function as its only parameter to which static properties can - * be added. - * all other properties are added to the prototype. - * @return {!Function} The class constructor. - */ -goog.defineClass = function(superClass, def) { - // TODO(johnlenz): consider making the superClass an optional parameter. - var constructor = def.constructor; - var statics = def.statics; - // Wrap the constructor prior to setting up the prototype and static methods. - if (!constructor || constructor == Object.prototype.constructor) { - constructor = function() { - throw Error('cannot instantiate an interface (no constructor defined).'); - }; - } - - var cls = goog.defineClass.createSealingConstructor_(constructor, superClass); - if (superClass) { - goog.inherits(cls, superClass); - } - - // Remove all the properties that should not be copied to the prototype. - delete def.constructor; - delete def.statics; - - goog.defineClass.applyProperties_(cls.prototype, def); - if (statics != null) { - if (statics instanceof Function) { - statics(cls); - } else { - goog.defineClass.applyProperties_(cls, statics); - } - } - - return cls; -}; - - -/** - * @typedef {{ - * constructor: (!Function|undefined), - * statics: (Object|undefined|function(Function):void) - * }} - * @suppress {missingProvide} - */ -goog.defineClass.ClassDescriptor; - - -/** - * @define {boolean} Whether the instances returned by goog.defineClass should - * be sealed when possible. - * - * When sealing is disabled the constructor function will not be wrapped by - * goog.defineClass, making it incompatible with ES6 class methods. - */ -goog.define('goog.defineClass.SEAL_CLASS_INSTANCES', goog.DEBUG); - - -/** - * If goog.defineClass.SEAL_CLASS_INSTANCES is enabled and Object.seal is - * defined, this function will wrap the constructor in a function that seals the - * results of the provided constructor function. - * - * @param {!Function} ctr The constructor whose results maybe be sealed. - * @param {Function} superClass The superclass constructor. - * @return {!Function} The replacement constructor. - * @private - */ -goog.defineClass.createSealingConstructor_ = function(ctr, superClass) { - if (!goog.defineClass.SEAL_CLASS_INSTANCES) { - // Do now wrap the constructor when sealing is disabled. Angular code - // depends on this for injection to work properly. - return ctr; - } - - // Compute whether the constructor is sealable at definition time, rather - // than when the instance is being constructed. - var superclassSealable = !goog.defineClass.isUnsealable_(superClass); - - /** - * @this {Object} - * @return {?} - */ - var wrappedCtr = function() { - // Don't seal an instance of a subclass when it calls the constructor of - // its super class as there is most likely still setup to do. - var instance = ctr.apply(this, arguments) || this; - instance[goog.UID_PROPERTY_] = instance[goog.UID_PROPERTY_]; - - if (this.constructor === wrappedCtr && superclassSealable && - Object.seal instanceof Function) { - Object.seal(instance); - } - return instance; - }; - - return wrappedCtr; -}; - - -/** - * @param {Function} ctr The constructor to test. - * @returns {boolean} Whether the constructor has been tagged as unsealable - * using goog.tagUnsealableClass. - * @private - */ -goog.defineClass.isUnsealable_ = function(ctr) { - return ctr && ctr.prototype && - ctr.prototype[goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_]; -}; - - -// TODO(johnlenz): share these values with the goog.object -/** - * The names of the fields that are defined on Object.prototype. - * @type {!Array<string>} - * @private - * @const - */ -goog.defineClass.OBJECT_PROTOTYPE_FIELDS_ = [ - 'constructor', 'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', - 'toLocaleString', 'toString', 'valueOf' -]; - - -// TODO(johnlenz): share this function with the goog.object -/** - * @param {!Object} target The object to add properties to. - * @param {!Object} source The object to copy properties from. - * @private - */ -goog.defineClass.applyProperties_ = function(target, source) { - // TODO(johnlenz): update this to support ES5 getters/setters - - var key; - for (key in source) { - if (Object.prototype.hasOwnProperty.call(source, key)) { - target[key] = source[key]; - } - } - - // For IE the for-in-loop does not contain any properties that are not - // enumerable on the prototype object (for example isPrototypeOf from - // Object.prototype) and it will also not include 'replace' on objects that - // extend String and change 'replace' (not that it is common for anyone to - // extend anything except Object). - for (var i = 0; i < goog.defineClass.OBJECT_PROTOTYPE_FIELDS_.length; i++) { - key = goog.defineClass.OBJECT_PROTOTYPE_FIELDS_[i]; - if (Object.prototype.hasOwnProperty.call(source, key)) { - target[key] = source[key]; - } - } -}; - - -/** - * Sealing classes breaks the older idiom of assigning properties on the - * prototype rather than in the constructor. As such, goog.defineClass - * must not seal subclasses of these old-style classes until they are fixed. - * Until then, this marks a class as "broken", instructing defineClass - * not to seal subclasses. - * @param {!Function} ctr The legacy constructor to tag as unsealable. - */ -goog.tagUnsealableClass = function(ctr) { - if (!COMPILED && goog.defineClass.SEAL_CLASS_INSTANCES) { - ctr.prototype[goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_] = true; - } -}; - - -/** - * Name for unsealable tag property. - * @const @private {string} - */ -goog.UNSEALABLE_CONSTRUCTOR_PROPERTY_ = 'goog_defineClass_legacy_unsealable'; |