X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/0494b8d9b9bb03ab6c22b34dae81261e3cd7e3e6..HEAD:/docs/source/Loader.html?ds=inline
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+
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+
The source code
-
-
+
+
+
+
-
- /*!
- * Ext JS Library 3.3.1
- * Copyright(c) 2006-2010 Sencha Inc.
- * licensing@sencha.com
- * http://www.sencha.com/license
- */
-/**
- * @class Ext.Loader
+
+ /**
+ * @class Ext.Loader
* @singleton
- * Simple class to help load JavaScript files on demand
+ * @author Jacky Nguyen <jacky@sencha.com>
+ * @docauthor Jacky Nguyen <jacky@sencha.com>
+ *
+ * Ext.Loader is the heart of the new dynamic dependency loading capability in Ext JS 4+. It is most commonly used
+ * via the {@link Ext#require} shorthand. Ext.Loader supports both asynchronous and synchronous loading
+ * approaches, and leverage their advantages for the best development flow. We'll discuss about the pros and cons
+ * of each approach:
+ *
+ * # Asynchronous Loading
+ *
+ * - Advantages:
+ * + Cross-domain
+ * + No web server needed: you can run the application via the file system protocol
+ * (i.e: `file://path/to/your/index.html`)
+ * + Best possible debugging experience: error messages come with the exact file name and line number
+ *
+ * - Disadvantages:
+ * + Dependencies need to be specified before-hand
+ *
+ * ### Method 1: Explicitly include what you need:
+ *
+ * // Syntax
+ * Ext.require({String/Array} expressions);
+ *
+ * // Example: Single alias
+ * Ext.require('widget.window');
+ *
+ * // Example: Single class name
+ * Ext.require('Ext.window.Window');
+ *
+ * // Example: Multiple aliases / class names mix
+ * Ext.require(['widget.window', 'layout.border', 'Ext.data.Connection']);
+ *
+ * // Wildcards
+ * Ext.require(['widget.*', 'layout.*', 'Ext.data.*']);
+ *
+ * ### Method 2: Explicitly exclude what you don't need:
+ *
+ * // Syntax: Note that it must be in this chaining format.
+ * Ext.exclude({String/Array} expressions)
+ * .require({String/Array} expressions);
+ *
+ * // Include everything except Ext.data.*
+ * Ext.exclude('Ext.data.*').require('*');Â
+ *
+ * // Include all widgets except widget.checkbox*,
+ * // which will match widget.checkbox, widget.checkboxfield, widget.checkboxgroup, etc.
+ * Ext.exclude('widget.checkbox*').require('widget.*');
+ *
+ * # Synchronous Loading on Demand
+ *
+ * - Advantages:
+ * + There's no need to specify dependencies before-hand, which is always the convenience of including
+ * ext-all.js before
+ *
+ * - Disadvantages:
+ * + Not as good debugging experience since file name won't be shown (except in Firebug at the moment)
+ * + Must be from the same domain due to XHR restriction
+ * + Need a web server, same reason as above
+ *
+ * There's one simple rule to follow: Instantiate everything with Ext.create instead of the `new` keyword
+ *
+ * Ext.create('widget.window', { ... }); // Instead of new Ext.window.Window({...});
+ *
+ * Ext.create('Ext.window.Window', {}); // Same as above, using full class name instead of alias
+ *
+ * Ext.widget('window', {}); // Same as above, all you need is the traditional `xtype`
+ *
+ * Behind the scene, {@link Ext.ClassManager} will automatically check whether the given class name / alias has already
+ * existed on the page. If it's not, Ext.Loader will immediately switch itself to synchronous mode and automatic load
+ * the given class and all its dependencies.
+ *
+ * # Hybrid Loading - The Best of Both Worlds
+ *
+ * It has all the advantages combined from asynchronous and synchronous loading. The development flow is simple:
+ *
+ * ### Step 1: Start writing your application using synchronous approach.
+ *
+ * Ext.Loader will automatically fetch all dependencies on demand as they're needed during run-time. For example:
+ *
+ * Ext.onReady(function(){
+ * var window = Ext.createWidget('window', {
+ * width: 500,
+ * height: 300,
+ * layout: {
+ * type: 'border',
+ * padding: 5
+ * },
+ * title: 'Hello Dialog',
+ * items: [{
+ * title: 'Navigation',
+ * collapsible: true,
+ * region: 'west',
+ * width: 200,
+ * html: 'Hello',
+ * split: true
+ * }, {
+ * title: 'TabPanel',
+ * region: 'center'
+ * }]
+ * });
+ *
+ * window.show();
+ * })
+ *
+ * ### Step 2: Along the way, when you need better debugging ability, watch the console for warnings like these:
+ *
+ * [Ext.Loader] Synchronously loading 'Ext.window.Window'; consider adding Ext.require('Ext.window.Window') before your application's code ClassManager.js:432
+ * [Ext.Loader] Synchronously loading 'Ext.layout.container.Border'; consider adding Ext.require('Ext.layout.container.Border') before your application's code
+ *
+ * Simply copy and paste the suggested code above `Ext.onReady`, e.g.:
+ *
+ * Ext.require('Ext.window.Window');
+ * Ext.require('Ext.layout.container.Border');
+ *
+ * Ext.onReady(...);
+ *
+ * Everything should now load via asynchronous mode.
+ *
+ * # Deployment
+ *
+ * It's important to note that dynamic loading should only be used during development on your local machines.
+ * During production, all dependencies should be combined into one single JavaScript file. Ext.Loader makes
+ * the whole process of transitioning from / to between development / maintenance and production as easy as
+ * possible. Internally {@link Ext.Loader#history Ext.Loader.history} maintains the list of all dependencies
+ * your application needs in the exact loading sequence. It's as simple as concatenating all files in this
+ * array into one, then include it on top of your application.
+ *
+ * This process will be automated with Sencha Command, to be released and documented towards Ext JS 4 Final.
*/
-Ext.Loader = Ext.apply({}, {
- /**
- * Loads a given set of .js files. Calls the callback function when all files have been loaded
- * Set preserveOrder to true to ensure non-parallel loading of files if load order is important
- * @param {Array} fileList Array of all files to load
- * @param {Function} callback Callback to call after all files have been loaded
- * @param {Object} scope The scope to call the callback in
- * @param {Boolean} preserveOrder True to make files load in serial, one after the other (defaults to false)
- */
- load: function(fileList, callback, scope, preserveOrder) {
- var scope = scope || this,
- head = document.getElementsByTagName("head")[0],
- fragment = document.createDocumentFragment(),
- numFiles = fileList.length,
- loadedFiles = 0,
- me = this;
-
- /**
- * Loads a particular file from the fileList by index. This is used when preserving order
- */
- var loadFileIndex = function(index) {
- head.appendChild(
- me.buildScriptTag(fileList[index], onFileLoaded)
- );
- };
-
- /**
- * Callback function which is called after each file has been loaded. This calls the callback
- * passed to load once the final file in the fileList has been loaded
- */
- var onFileLoaded = function() {
- loadedFiles ++;
-
- //if this was the last file, call the callback, otherwise load the next file
- if (numFiles == loadedFiles && typeof callback == 'function') {
- callback.call(scope);
- } else {
- if (preserveOrder === true) {
- loadFileIndex(loadedFiles);
- }
- }
- };
-
- if (preserveOrder === true) {
- loadFileIndex.call(this, 0);
- } else {
- //load each file (most browsers will do this in parallel)
- Ext.each(fileList, function(file, index) {
- fragment.appendChild(
- this.buildScriptTag(file, onFileLoaded)
- );
- }, this);
-
- head.appendChild(fragment);
+(function(Manager, Class, flexSetter, alias) {
+
+ var
+ //<if nonBrowser>
+ isNonBrowser = typeof window === 'undefined',
+ isNodeJS = isNonBrowser && (typeof require === 'function'),
+ isPhantomJS = (typeof phantom !== 'undefined' && phantom.fs),
+ //</if>
+ dependencyProperties = ['extend', 'mixins', 'requires'],
+ Loader;
+
+ Loader = Ext.Loader = {
+ /**
+ * @private
+ */
+ documentHead: typeof document !== 'undefined' && (document.head || document.getElementsByTagName('head')[0]),
+
+ /**
+ * Flag indicating whether there are still files being loaded
+ * @private
+ */
+ isLoading: false,
+
+ /**
+ * Maintain the queue for all dependencies. Each item in the array is an object of the format:
+ * {
+ * requires: [...], // The required classes for this queue item
+ * callback: function() { ... } // The function to execute when all classes specified in requires exist
+ * }
+ * @private
+ */
+ queue: [],
+
+ /**
+ * Maintain the list of files that have already been handled so that they never get double-loaded
+ * @private
+ */
+ isFileLoaded: {},
+
+ /**
+ * Maintain the list of listeners to execute when all required scripts are fully loaded
+ * @private
+ */
+ readyListeners: [],
+
+ /**
+ * Contains optional dependencies to be loaded last
+ * @private
+ */
+ optionalRequires: [],
+
+ /**
+ * Map of fully qualified class names to an array of dependent classes.
+ * @private
+ */
+ requiresMap: {},
+
+ /**
+ * @private
+ */
+ numPendingFiles: 0,
+
+ /**
+ * @private
+ */
+ numLoadedFiles: 0,
+
+ /** @private */
+ hasFileLoadError: false,
+
+ /**
+ * @private
+ */
+ classNameToFilePathMap: {},
+
+ /**
+ * @property {String[]} history
+ * An array of class names to keep track of the dependency loading order.
+ * This is not guaranteed to be the same everytime due to the asynchronous nature of the Loader.
+ */
+ history: [],
+
+ /**
+ * Configuration
+ * @private
+ */
+ config: {
+ /**
+ * @cfg {Boolean} enabled
+ * Whether or not to enable the dynamic dependency loading feature.
+ */
+ enabled: false,
+
+ /**
+ * @cfg {Boolean} disableCaching
+ * Appends current timestamp to script files to prevent caching.
+ */
+ disableCaching: true,
+
+ /**
+ * @cfg {String} disableCachingParam
+ * The get parameter name for the cache buster's timestamp.
+ */
+ disableCachingParam: '_dc',
+
+ /**
+ * @cfg {Object} paths
+ * The mapping from namespaces to file paths
+ *
+ * {
+ * 'Ext': '.', // This is set by default, Ext.layout.container.Container will be
+ * // loaded from ./layout/Container.js
+ *
+ * 'My': './src/my_own_folder' // My.layout.Container will be loaded from
+ * // ./src/my_own_folder/layout/Container.js
+ * }
+ *
+ * Note that all relative paths are relative to the current HTML document.
+ * If not being specified, for example, `Other.awesome.Class`
+ * will simply be loaded from `./Other/awesome/Class.js`
+ */
+ paths: {
+ 'Ext': '.'
+ }
+ },
+
+ /**
+ * Set the configuration for the loader. This should be called right after ext-core.js
+ * (or ext-core-debug.js) is included in the page, e.g.:
+ *
+ * <script type="text/javascript" src="ext-core-debug.js"></script>
+ * <script type="text/javascript">
+ * Ext.Loader.setConfig({
+ * enabled: true,
+ * paths: {
+ * 'My': 'my_own_path'
+ * }
+ * });
+ * <script>
+ * <script type="text/javascript">
+ * Ext.require(...);
+ *
+ * Ext.onReady(function() {
+ * // application code here
+ * });
+ * </script>
+ *
+ * Refer to config options of {@link Ext.Loader} for the list of possible properties.
+ *
+ * @param {String/Object} name Name of the value to override, or a config object to override multiple values.
+ * @param {Object} value (optional) The new value to set, needed if first parameter is String.
+ * @return {Ext.Loader} this
+ */
+ setConfig: function(name, value) {
+ if (Ext.isObject(name) && arguments.length === 1) {
+ Ext.Object.merge(this.config, name);
+ }
+ else {
+ this.config[name] = (Ext.isObject(value)) ? Ext.Object.merge(this.config[name], value) : value;
+ }
+
+ return this;
+ },
+
+ /**
+ * Get the config value corresponding to the specified name.
+ * If no name is given, will return the config object.
+ * @param {String} name The config property name
+ * @return {Object}
+ */
+ getConfig: function(name) {
+ if (name) {
+ return this.config[name];
+ }
+
+ return this.config;
+ },
+
+ /**
+ * Sets the path of a namespace. For Example:
+ *
+ * Ext.Loader.setPath('Ext', '.');
+ *
+ * @param {String/Object} name See {@link Ext.Function#flexSetter flexSetter}
+ * @param {String} path See {@link Ext.Function#flexSetter flexSetter}
+ * @return {Ext.Loader} this
+ * @method
+ */
+ setPath: flexSetter(function(name, path) {
+ //<if nonBrowser>
+ if (isNonBrowser) {
+ if (isNodeJS) {
+ path = require('fs').realpathSync(path);
+ }
+ }
+ //</if>
+ this.config.paths[name] = path;
+
+ return this;
+ }),
+
+ /**
+ * Translates a className to a file path by adding the the proper prefix and converting the .'s to /'s.
+ * For example:
+ *
+ * Ext.Loader.setPath('My', '/path/to/My');
+ *
+ * alert(Ext.Loader.getPath('My.awesome.Class')); // alerts '/path/to/My/awesome/Class.js'
+ *
+ * Note that the deeper namespace levels, if explicitly set, are always resolved first. For example:
+ *
+ * Ext.Loader.setPath({
+ * 'My': '/path/to/lib',
+ * 'My.awesome': '/other/path/for/awesome/stuff',
+ * 'My.awesome.more': '/more/awesome/path'
+ * });
+ *
+ * alert(Ext.Loader.getPath('My.awesome.Class')); // alerts '/other/path/for/awesome/stuff/Class.js'
+ *
+ * alert(Ext.Loader.getPath('My.awesome.more.Class')); // alerts '/more/awesome/path/Class.js'
+ *
+ * alert(Ext.Loader.getPath('My.cool.Class')); // alerts '/path/to/lib/cool/Class.js'
+ *
+ * alert(Ext.Loader.getPath('Unknown.strange.Stuff')); // alerts 'Unknown/strange/Stuff.js'
+ *
+ * @param {String} className
+ * @return {String} path
+ */
+ getPath: function(className) {
+ var path = '',
+ paths = this.config.paths,
+ prefix = this.getPrefix(className);
+
+ if (prefix.length > 0) {
+ if (prefix === className) {
+ return paths[prefix];
+ }
+
+ path = paths[prefix];
+ className = className.substring(prefix.length + 1);
+ }
+
+ if (path.length > 0) {
+ path += '/';
+ }
+
+ return path.replace(/\/\.\//g, '/') + className.replace(/\./g, "/") + '.js';
+ },
+
+ /**
+ * @private
+ * @param {String} className
+ */
+ getPrefix: function(className) {
+ var paths = this.config.paths,
+ prefix, deepestPrefix = '';
+
+ if (paths.hasOwnProperty(className)) {
+ return className;
+ }
+
+ for (prefix in paths) {
+ if (paths.hasOwnProperty(prefix) && prefix + '.' === className.substring(0, prefix.length + 1)) {
+ if (prefix.length > deepestPrefix.length) {
+ deepestPrefix = prefix;
+ }
+ }
+ }
+
+ return deepestPrefix;
+ },
+
+ /**
+ * Refresh all items in the queue. If all dependencies for an item exist during looping,
+ * it will execute the callback and call refreshQueue again. Triggers onReady when the queue is
+ * empty
+ * @private
+ */
+ refreshQueue: function() {
+ var ln = this.queue.length,
+ i, item, j, requires;
+
+ if (ln === 0) {
+ this.triggerReady();
+ return;
+ }
+
+ for (i = 0; i < ln; i++) {
+ item = this.queue[i];
+
+ if (item) {
+ requires = item.requires;
+
+ // Don't bother checking when the number of files loaded
+ // is still less than the array length
+ if (requires.length > this.numLoadedFiles) {
+ continue;
+ }
+
+ j = 0;
+
+ do {
+ if (Manager.isCreated(requires[j])) {
+ // Take out from the queue
+ Ext.Array.erase(requires, j, 1);
+ }
+ else {
+ j++;
+ }
+ } while (j < requires.length);
+
+ if (item.requires.length === 0) {
+ Ext.Array.erase(this.queue, i, 1);
+ item.callback.call(item.scope);
+ this.refreshQueue();
+ break;
+ }
+ }
+ }
+
+ return this;
+ },
+
+ /**
+ * Inject a script element to document's head, call onLoad and onError accordingly
+ * @private
+ */
+ injectScriptElement: function(url, onLoad, onError, scope) {
+ var script = document.createElement('script'),
+ me = this,
+ onLoadFn = function() {
+ me.cleanupScriptElement(script);
+ onLoad.call(scope);
+ },
+ onErrorFn = function() {
+ me.cleanupScriptElement(script);
+ onError.call(scope);
+ };
+
+ script.type = 'text/javascript';
+ script.src = url;
+ script.onload = onLoadFn;
+ script.onerror = onErrorFn;
+ script.onreadystatechange = function() {
+ if (this.readyState === 'loaded' || this.readyState === 'complete') {
+ onLoadFn();
+ }
+ };
+
+ this.documentHead.appendChild(script);
+
+ return script;
+ },
+
+ /**
+ * @private
+ */
+ cleanupScriptElement: function(script) {
+ script.onload = null;
+ script.onreadystatechange = null;
+ script.onerror = null;
+
+ return this;
+ },
+
+ /**
+ * Load a script file, supports both asynchronous and synchronous approaches
+ *
+ * @param {String} url
+ * @param {Function} onLoad
+ * @param {Object} scope
+ * @param {Boolean} synchronous
+ * @private
+ */
+ loadScriptFile: function(url, onLoad, onError, scope, synchronous) {
+ var me = this,
+ noCacheUrl = url + (this.getConfig('disableCaching') ? ('?' + this.getConfig('disableCachingParam') + '=' + Ext.Date.now()) : ''),
+ fileName = url.split('/').pop(),
+ isCrossOriginRestricted = false,
+ xhr, status, onScriptError;
+
+ scope = scope || this;
+
+ this.isLoading = true;
+
+ if (!synchronous) {
+ onScriptError = function() {
+ onError.call(scope, "Failed loading '" + url + "', please verify that the file exists", synchronous);
+ };
+
+ if (!Ext.isReady && Ext.onDocumentReady) {
+ Ext.onDocumentReady(function() {
+ me.injectScriptElement(noCacheUrl, onLoad, onScriptError, scope);
+ });
+ }
+ else {
+ this.injectScriptElement(noCacheUrl, onLoad, onScriptError, scope);
+ }
+ }
+ else {
+ if (typeof XMLHttpRequest !== 'undefined') {
+ xhr = new XMLHttpRequest();
+ } else {
+ xhr = new ActiveXObject('Microsoft.XMLHTTP');
+ }
+
+ try {
+ xhr.open('GET', noCacheUrl, false);
+ xhr.send(null);
+ } catch (e) {
+ isCrossOriginRestricted = true;
+ }
+
+ status = (xhr.status === 1223) ? 204 : xhr.status;
+
+ if (!isCrossOriginRestricted) {
+ isCrossOriginRestricted = (status === 0);
+ }
+
+ if (isCrossOriginRestricted
+ //<if isNonBrowser>
+ && !isPhantomJS
+ //</if>
+ ) {
+ onError.call(this, "Failed loading synchronously via XHR: '" + url + "'; It's likely that the file is either " +
+ "being loaded from a different domain or from the local file system whereby cross origin " +
+ "requests are not allowed due to security reasons. Use asynchronous loading with " +
+ "Ext.require instead.", synchronous);
+ }
+ else if (status >= 200 && status < 300
+ //<if isNonBrowser>
+ || isPhantomJS
+ //</if>
+ ) {
+ // Firebug friendly, file names are still shown even though they're eval'ed code
+ new Function(xhr.responseText + "\n//@ sourceURL=" + fileName)();
+
+ onLoad.call(scope);
+ }
+ else {
+ onError.call(this, "Failed loading synchronously via XHR: '" + url + "'; please " +
+ "verify that the file exists. " +
+ "XHR status code: " + status, synchronous);
+ }
+
+ // Prevent potential IE memory leak
+ xhr = null;
+ }
+ },
+
+ /**
+ * Explicitly exclude files from being loaded. Useful when used in conjunction with a broad include expression.
+ * Can be chained with more `require` and `exclude` methods, e.g.:
+ *
+ * Ext.exclude('Ext.data.*').require('*');
+ *
+ * Ext.exclude('widget.button*').require('widget.*');
+ *
+ * {@link Ext#exclude Ext.exclude} is alias for {@link Ext.Loader#exclude Ext.Loader.exclude} for convenience.
+ *
+ * @param {String/String[]} excludes
+ * @return {Object} object contains `require` method for chaining
+ */
+ exclude: function(excludes) {
+ var me = this;
+
+ return {
+ require: function(expressions, fn, scope) {
+ return me.require(expressions, fn, scope, excludes);
+ },
+
+ syncRequire: function(expressions, fn, scope) {
+ return me.syncRequire(expressions, fn, scope, excludes);
+ }
+ };
+ },
+
+ /**
+ * Synchronously loads all classes by the given names and all their direct dependencies;
+ * optionally executes the given callback function when finishes, within the optional scope.
+ *
+ * {@link Ext#syncRequire Ext.syncRequire} is alias for {@link Ext.Loader#syncRequire Ext.Loader.syncRequire} for convenience.
+ *
+ * @param {String/String[]} expressions Can either be a string or an array of string
+ * @param {Function} fn (Optional) The callback function
+ * @param {Object} scope (Optional) The execution scope (`this`) of the callback function
+ * @param {String/String[]} excludes (Optional) Classes to be excluded, useful when being used with expressions
+ */
+ syncRequire: function() {
+ this.syncModeEnabled = true;
+ this.require.apply(this, arguments);
+ this.refreshQueue();
+ this.syncModeEnabled = false;
+ },
+
+ /**
+ * Loads all classes by the given names and all their direct dependencies;
+ * optionally executes the given callback function when finishes, within the optional scope.
+ *
+ * {@link Ext#require Ext.require} is alias for {@link Ext.Loader#require Ext.Loader.require} for convenience.
+ *
+ * @param {String/String[]} expressions Can either be a string or an array of string
+ * @param {Function} fn (Optional) The callback function
+ * @param {Object} scope (Optional) The execution scope (`this`) of the callback function
+ * @param {String/String[]} excludes (Optional) Classes to be excluded, useful when being used with expressions
+ */
+ require: function(expressions, fn, scope, excludes) {
+ var filePath, expression, exclude, className, excluded = {},
+ excludedClassNames = [],
+ possibleClassNames = [],
+ possibleClassName, classNames = [],
+ i, j, ln, subLn;
+
+ expressions = Ext.Array.from(expressions);
+ excludes = Ext.Array.from(excludes);
+
+ fn = fn || Ext.emptyFn;
+
+ scope = scope || Ext.global;
+
+ for (i = 0, ln = excludes.length; i < ln; i++) {
+ exclude = excludes[i];
+
+ if (typeof exclude === 'string' && exclude.length > 0) {
+ excludedClassNames = Manager.getNamesByExpression(exclude);
+
+ for (j = 0, subLn = excludedClassNames.length; j < subLn; j++) {
+ excluded[excludedClassNames[j]] = true;
+ }
+ }
+ }
+
+ for (i = 0, ln = expressions.length; i < ln; i++) {
+ expression = expressions[i];
+
+ if (typeof expression === 'string' && expression.length > 0) {
+ possibleClassNames = Manager.getNamesByExpression(expression);
+
+ for (j = 0, subLn = possibleClassNames.length; j < subLn; j++) {
+ possibleClassName = possibleClassNames[j];
+
+ if (!excluded.hasOwnProperty(possibleClassName) && !Manager.isCreated(possibleClassName)) {
+ Ext.Array.include(classNames, possibleClassName);
+ }
+ }
+ }
+ }
+
+ // If the dynamic dependency feature is not being used, throw an error
+ // if the dependencies are not defined
+ if (!this.config.enabled) {
+ if (classNames.length > 0) {
+ Ext.Error.raise({
+ sourceClass: "Ext.Loader",
+ sourceMethod: "require",
+ msg: "Ext.Loader is not enabled, so dependencies cannot be resolved dynamically. " +
+ "Missing required class" + ((classNames.length > 1) ? "es" : "") + ": " + classNames.join(', ')
+ });
+ }
+ }
+
+ if (classNames.length === 0) {
+ fn.call(scope);
+ return this;
+ }
+
+ this.queue.push({
+ requires: classNames,
+ callback: fn,
+ scope: scope
+ });
+
+ classNames = classNames.slice();
+
+ for (i = 0, ln = classNames.length; i < ln; i++) {
+ className = classNames[i];
+
+ if (!this.isFileLoaded.hasOwnProperty(className)) {
+ this.isFileLoaded[className] = false;
+
+ filePath = this.getPath(className);
+
+ this.classNameToFilePathMap[className] = filePath;
+
+ this.numPendingFiles++;
+
+ //<if nonBrowser>
+ if (isNonBrowser) {
+ if (isNodeJS) {
+ require(filePath);
+ }
+ // Temporary support for hammerjs
+ else {
+ var f = fs.open(filePath),
+ content = '',
+ line;
+
+ while (true) {
+ line = f.readLine();
+ if (line.length === 0) {
+ break;
+ }
+ content += line;
+ }
+
+ f.close();
+ eval(content);
+ }
+
+ this.onFileLoaded(className, filePath);
+
+ if (ln === 1) {
+ return Manager.get(className);
+ }
+
+ continue;
+ }
+ //</if>
+ this.loadScriptFile(
+ filePath,
+ Ext.Function.pass(this.onFileLoaded, [className, filePath], this),
+ Ext.Function.pass(this.onFileLoadError, [className, filePath]),
+ this,
+ this.syncModeEnabled
+ );
+ }
+ }
+
+ return this;
+ },
+
+ /**
+ * @private
+ * @param {String} className
+ * @param {String} filePath
+ */
+ onFileLoaded: function(className, filePath) {
+ this.numLoadedFiles++;
+
+ this.isFileLoaded[className] = true;
+
+ this.numPendingFiles--;
+
+ if (this.numPendingFiles === 0) {
+ this.refreshQueue();
+ }
+
+ //<debug>
+ if (this.numPendingFiles <= 1) {
+ window.status = "Finished loading all dependencies, onReady fired!";
+ }
+ else {
+ window.status = "Loading dependencies, " + this.numPendingFiles + " files left...";
+ }
+ //</debug>
+
+ //<debug>
+ if (!this.syncModeEnabled && this.numPendingFiles === 0 && this.isLoading && !this.hasFileLoadError) {
+ var queue = this.queue,
+ requires,
+ i, ln, j, subLn, missingClasses = [], missingPaths = [];
+
+ for (i = 0, ln = queue.length; i < ln; i++) {
+ requires = queue[i].requires;
+
+ for (j = 0, subLn = requires.length; j < ln; j++) {
+ if (this.isFileLoaded[requires[j]]) {
+ missingClasses.push(requires[j]);
+ }
+ }
+ }
+
+ if (missingClasses.length < 1) {
+ return;
+ }
+
+ missingClasses = Ext.Array.filter(missingClasses, function(item) {
+ return !this.requiresMap.hasOwnProperty(item);
+ }, this);
+
+ for (i = 0,ln = missingClasses.length; i < ln; i++) {
+ missingPaths.push(this.classNameToFilePathMap[missingClasses[i]]);
+ }
+
+ Ext.Error.raise({
+ sourceClass: "Ext.Loader",
+ sourceMethod: "onFileLoaded",
+ msg: "The following classes are not declared even if their files have been " +
+ "loaded: '" + missingClasses.join("', '") + "'. Please check the source code of their " +
+ "corresponding files for possible typos: '" + missingPaths.join("', '") + "'"
+ });
+ }
+ //</debug>
+ },
+
+ /**
+ * @private
+ */
+ onFileLoadError: function(className, filePath, errorMessage, isSynchronous) {
+ this.numPendingFiles--;
+ this.hasFileLoadError = true;
+
+ //<debug error>
+ Ext.Error.raise({
+ sourceClass: "Ext.Loader",
+ classToLoad: className,
+ loadPath: filePath,
+ loadingType: isSynchronous ? 'synchronous' : 'async',
+ msg: errorMessage
+ });
+ //</debug>
+ },
+
+ /**
+ * @private
+ */
+ addOptionalRequires: function(requires) {
+ var optionalRequires = this.optionalRequires,
+ i, ln, require;
+
+ requires = Ext.Array.from(requires);
+
+ for (i = 0, ln = requires.length; i < ln; i++) {
+ require = requires[i];
+
+ Ext.Array.include(optionalRequires, require);
+ }
+
+ return this;
+ },
+
+ /**
+ * @private
+ */
+ triggerReady: function(force) {
+ var readyListeners = this.readyListeners,
+ optionalRequires, listener;
+
+ if (this.isLoading || force) {
+ this.isLoading = false;
+
+ if (this.optionalRequires.length) {
+ // Clone then empty the array to eliminate potential recursive loop issue
+ optionalRequires = Ext.Array.clone(this.optionalRequires);
+
+ // Empty the original array
+ this.optionalRequires.length = 0;
+
+ this.require(optionalRequires, Ext.Function.pass(this.triggerReady, [true], this), this);
+ return this;
+ }
+
+ while (readyListeners.length) {
+ listener = readyListeners.shift();
+ listener.fn.call(listener.scope);
+
+ if (this.isLoading) {
+ return this;
+ }
+ }
+ }
+
+ return this;
+ },
+
+ /**
+ * Adds new listener to be executed when all required scripts are fully loaded.
+ *
+ * @param {Function} fn The function callback to be executed
+ * @param {Object} scope The execution scope (`this`) of the callback function
+ * @param {Boolean} withDomReady Whether or not to wait for document dom ready as well
+ */
+ onReady: function(fn, scope, withDomReady, options) {
+ var oldFn;
+
+ if (withDomReady !== false && Ext.onDocumentReady) {
+ oldFn = fn;
+
+ fn = function() {
+ Ext.onDocumentReady(oldFn, scope, options);
+ };
+ }
+
+ if (!this.isLoading) {
+ fn.call(scope);
+ }
+ else {
+ this.readyListeners.push({
+ fn: fn,
+ scope: scope
+ });
+ }
+ },
+
+ /**
+ * @private
+ * @param {String} className
+ */
+ historyPush: function(className) {
+ if (className && this.isFileLoaded.hasOwnProperty(className)) {
+ Ext.Array.include(this.history, className);
+ }
+
+ return this;
}
- },
-
- /**
- * @private
- * Creates and returns a script tag, but does not place it into the document. If a callback function
- * is passed, this is called when the script has been loaded
- * @param {String} filename The name of the file to create a script tag for
- * @param {Function} callback Optional callback, which is called when the script has been loaded
- * @return {Element} The new script ta
+ };
+
+ /**
+ * @member Ext
+ * @method require
+ * @alias Ext.Loader#require
*/
- buildScriptTag: function(filename, callback) {
- var script = document.createElement('script');
- script.type = "text/javascript";
- script.src = filename;
-
- //IE has a different way of handling <script> loads, so we need to check for it here
- if (script.readyState) {
- script.onreadystatechange = function() {
- if (script.readyState == "loaded" || script.readyState == "complete") {
- script.onreadystatechange = null;
- callback();
+ Ext.require = alias(Loader, 'require');
+
+ /**
+ * @member Ext
+ * @method syncRequire
+ * @alias Ext.Loader#syncRequire
+ */
+ Ext.syncRequire = alias(Loader, 'syncRequire');
+
+ /**
+ * @member Ext
+ * @method exclude
+ * @alias Ext.Loader#exclude
+ */
+ Ext.exclude = alias(Loader, 'exclude');
+
+ /**
+ * @member Ext
+ * @method onReady
+ * @alias Ext.Loader#onReady
+ */
+ Ext.onReady = function(fn, scope, options) {
+ Loader.onReady(fn, scope, true, options);
+ };
+
+ /**
+ * @cfg {String[]} requires
+ * @member Ext.Class
+ * List of classes that have to be loaded before instantiating this class.
+ * For example:
+ *
+ * Ext.define('Mother', {
+ * requires: ['Child'],
+ * giveBirth: function() {
+ * // we can be sure that child class is available.
+ * return new Child();
+ * }
+ * });
+ */
+ Class.registerPreprocessor('loader', function(cls, data, continueFn) {
+ var me = this,
+ dependencies = [],
+ className = Manager.getName(cls),
+ i, j, ln, subLn, value, propertyName, propertyValue;
+
+ /*
+ Basically loop through the dependencyProperties, look for string class names and push
+ them into a stack, regardless of whether the property's value is a string, array or object. For example:
+ {
+ extend: 'Ext.MyClass',
+ requires: ['Ext.some.OtherClass'],
+ mixins: {
+ observable: 'Ext.util.Observable';
+ }
+ }
+ which will later be transformed into:
+ {
+ extend: Ext.MyClass,
+ requires: [Ext.some.OtherClass],
+ mixins: {
+ observable: Ext.util.Observable;
+ }
+ }
+ */
+
+ for (i = 0, ln = dependencyProperties.length; i < ln; i++) {
+ propertyName = dependencyProperties[i];
+
+ if (data.hasOwnProperty(propertyName)) {
+ propertyValue = data[propertyName];
+
+ if (typeof propertyValue === 'string') {
+ dependencies.push(propertyValue);
+ }
+ else if (propertyValue instanceof Array) {
+ for (j = 0, subLn = propertyValue.length; j < subLn; j++) {
+ value = propertyValue[j];
+
+ if (typeof value === 'string') {
+ dependencies.push(value);
+ }
+ }
+ }
+ else if (typeof propertyValue != 'function') {
+ for (j in propertyValue) {
+ if (propertyValue.hasOwnProperty(j)) {
+ value = propertyValue[j];
+
+ if (typeof value === 'string') {
+ dependencies.push(value);
+ }
+ }
+ }
+ }
+ }
+ }
+
+ if (dependencies.length === 0) {
+// Loader.historyPush(className);
+ return;
+ }
+
+ //<debug error>
+ var deadlockPath = [],
+ requiresMap = Loader.requiresMap,
+ detectDeadlock;
+
+ /*
+ Automatically detect deadlocks before-hand,
+ will throw an error with detailed path for ease of debugging. Examples of deadlock cases:
+
+ - A extends B, then B extends A
+ - A requires B, B requires C, then C requires A
+
+ The detectDeadlock function will recursively transverse till the leaf, hence it can detect deadlocks
+ no matter how deep the path is.
+ */
+
+ if (className) {
+ requiresMap[className] = dependencies;
+
+ detectDeadlock = function(cls) {
+ deadlockPath.push(cls);
+
+ if (requiresMap[cls]) {
+ if (Ext.Array.contains(requiresMap[cls], className)) {
+ Ext.Error.raise({
+ sourceClass: "Ext.Loader",
+ msg: "Deadlock detected while loading dependencies! '" + className + "' and '" +
+ deadlockPath[1] + "' " + "mutually require each other. Path: " +
+ deadlockPath.join(' -> ') + " -> " + deadlockPath[0]
+ });
+ }
+
+ for (i = 0, ln = requiresMap[cls].length; i < ln; i++) {
+ detectDeadlock(requiresMap[cls][i]);
+ }
}
};
- } else {
- script.onload = callback;
- }
-
- return script;
- }
-});
-
+
+ detectDeadlock(className);
+ }
+
+ //</debug>
+
+ Loader.require(dependencies, function() {
+ for (i = 0, ln = dependencyProperties.length; i < ln; i++) {
+ propertyName = dependencyProperties[i];
+
+ if (data.hasOwnProperty(propertyName)) {
+ propertyValue = data[propertyName];
+
+ if (typeof propertyValue === 'string') {
+ data[propertyName] = Manager.get(propertyValue);
+ }
+ else if (propertyValue instanceof Array) {
+ for (j = 0, subLn = propertyValue.length; j < subLn; j++) {
+ value = propertyValue[j];
+
+ if (typeof value === 'string') {
+ data[propertyName][j] = Manager.get(value);
+ }
+ }
+ }
+ else if (typeof propertyValue != 'function') {
+ for (var k in propertyValue) {
+ if (propertyValue.hasOwnProperty(k)) {
+ value = propertyValue[k];
+
+ if (typeof value === 'string') {
+ data[propertyName][k] = Manager.get(value);
+ }
+ }
+ }
+ }
+ }
+ }
+
+ continueFn.call(me, cls, data);
+ });
+
+ return false;
+ }, true);
+
+ Class.setDefaultPreprocessorPosition('loader', 'after', 'className');
+
+ /**
+ * @cfg {String[]} uses
+ * @member Ext.Class
+ * List of classes to load together with this class. These aren't neccessarily loaded before
+ * this class is instantiated. For example:
+ *
+ * Ext.define('Mother', {
+ * uses: ['Child'],
+ * giveBirth: function() {
+ * // This code might, or might not work:
+ * // return new Child();
+ *
+ * // Instead use Ext.create() to load the class at the spot if not loaded already:
+ * return Ext.create('Child');
+ * }
+ * });
+ */
+ Manager.registerPostprocessor('uses', function(name, cls, data) {
+ var uses = Ext.Array.from(data.uses),
+ items = [],
+ i, ln, item;
+
+ for (i = 0, ln = uses.length; i < ln; i++) {
+ item = uses[i];
+
+ if (typeof item === 'string') {
+ items.push(item);
+ }
+ }
+
+ Loader.addOptionalRequires(items);
+ });
+
+ Manager.setDefaultPostprocessorPosition('uses', 'last');
+
+})(Ext.ClassManager, Ext.Class, Ext.Function.flexSetter, Ext.Function.alias);
+
-
\ No newline at end of file
+