Current File : /var/www/crm/include/javascript/tiny_mce/classes/dom/ScriptLoader.js
/**
* ScriptLoader.js
*
* Copyright 2009, Moxiecode Systems AB
* Released under LGPL License.
*
* License: http://tinymce.moxiecode.com/license
* Contributing: http://tinymce.moxiecode.com/contributing
*/
(function(tinymce) {
/**
* This class handles asynchronous/synchronous loading of JavaScript files it will execute callbacks when various items gets loaded. This class is useful to load external JavaScript files.
*
* @class tinymce.dom.ScriptLoader
* @example
* // Load a script from a specific URL using the global script loader
* tinymce.ScriptLoader.load('somescript.js');
*
* // Load a script using a unique instance of the script loader
* var scriptLoader = new tinymce.dom.ScriptLoader();
*
* scriptLoader.load('somescript.js');
*
* // Load multiple scripts
* var scriptLoader = new tinymce.dom.ScriptLoader();
*
* scriptLoader.add('somescript1.js');
* scriptLoader.add('somescript2.js');
* scriptLoader.add('somescript3.js');
*
* scriptLoader.loadQueue(function() {
* alert('All scripts are now loaded.');
* });
*/
tinymce.dom.ScriptLoader = function(settings) {
var QUEUED = 0,
LOADING = 1,
LOADED = 2,
states = {},
queue = [],
scriptLoadedCallbacks = {},
queueLoadedCallbacks = [],
loading = 0,
undefined;
/**
* Loads a specific script directly without adding it to the load queue.
*
* @method load
* @param {String} url Absolute URL to script to add.
* @param {function} callback Optional callback function to execute ones this script gets loaded.
* @param {Object} scope Optional scope to execute callback in.
*/
function loadScript(url, callback) {
var t = this, dom = tinymce.DOM, elm, uri, loc, id;
// Execute callback when script is loaded
function done() {
dom.remove(id);
if (elm)
elm.onreadystatechange = elm.onload = elm = null;
callback();
};
function error() {
// Report the error so it's easier for people to spot loading errors
if (typeof(console) !== "undefined" && console.log)
console.log("Failed to load: " + url);
// We can't mark it as done if there is a load error since
// A) We don't want to produce 404 errors on the server and
// B) the onerror event won't fire on all browsers.
// done();
};
id = dom.uniqueId();
if (tinymce.isIE6) {
uri = new tinymce.util.URI(url);
loc = location;
// If script is from same domain and we
// use IE 6 then use XHR since it's more reliable
if (uri.host == loc.hostname && uri.port == loc.port && (uri.protocol + ':') == loc.protocol && uri.protocol.toLowerCase() != 'file') {
tinymce.util.XHR.send({
url : tinymce._addVer(uri.getURI()),
success : function(content) {
// Create new temp script element
var script = dom.create('script', {
type : 'text/javascript'
});
// Evaluate script in global scope
script.text = content;
document.getElementsByTagName('head')[0].appendChild(script);
dom.remove(script);
done();
},
error : error
});
return;
}
}
// Create new script element
elm = dom.create('script', {
id : id,
type : 'text/javascript',
src : tinymce._addVer(url)
});
// Add onload listener for non IE browsers since IE9
// fires onload event before the script is parsed and executed
if (!tinymce.isIE)
elm.onload = done;
// Add onerror event will get fired on some browsers but not all of them
elm.onerror = error;
// Opera 9.60 doesn't seem to fire the onreadystate event at correctly
if (!tinymce.isOpera) {
elm.onreadystatechange = function() {
var state = elm.readyState;
// Loaded state is passed on IE 6 however there
// are known issues with this method but we can't use
// XHR in a cross domain loading
if (state == 'complete' || state == 'loaded')
done();
};
}
// Most browsers support this feature so we report errors
// for those at least to help users track their missing plugins etc
// todo: Removed since it produced error if the document is unloaded by navigating away, re-add it as an option
/*elm.onerror = function() {
alert('Failed to load: ' + url);
};*/
// Add script to document
(document.getElementsByTagName('head')[0] || document.body).appendChild(elm);
};
/**
* Returns true/false if a script has been loaded or not.
*
* @method isDone
* @param {String} url URL to check for.
* @return [Boolean} true/false if the URL is loaded.
*/
this.isDone = function(url) {
return states[url] == LOADED;
};
/**
* Marks a specific script to be loaded. This can be useful if a script got loaded outside
* the script loader or to skip it from loading some script.
*
* @method markDone
* @param {string} u Absolute URL to the script to mark as loaded.
*/
this.markDone = function(url) {
states[url] = LOADED;
};
/**
* Adds a specific script to the load queue of the script loader.
*
* @method add
* @param {String} url Absolute URL to script to add.
* @param {function} callback Optional callback function to execute ones this script gets loaded.
* @param {Object} scope Optional scope to execute callback in.
*/
this.add = this.load = function(url, callback, scope) {
var item, state = states[url];
// Add url to load queue
if (state == undefined) {
queue.push(url);
states[url] = QUEUED;
}
if (callback) {
// Store away callback for later execution
if (!scriptLoadedCallbacks[url])
scriptLoadedCallbacks[url] = [];
scriptLoadedCallbacks[url].push({
func : callback,
scope : scope || this
});
}
};
/**
* Starts the loading of the queue.
*
* @method loadQueue
* @param {function} callback Optional callback to execute when all queued items are loaded.
* @param {Object} scope Optional scope to execute the callback in.
*/
this.loadQueue = function(callback, scope) {
this.loadScripts(queue, callback, scope);
};
/**
* Loads the specified queue of files and executes the callback ones they are loaded.
* This method is generally not used outside this class but it might be useful in some scenarios.
*
* @method loadScripts
* @param {Array} scripts Array of queue items to load.
* @param {function} callback Optional callback to execute ones all items are loaded.
* @param {Object} scope Optional scope to execute callback in.
*/
this.loadScripts = function(scripts, callback, scope) {
var loadScripts;
function execScriptLoadedCallbacks(url) {
// Execute URL callback functions
tinymce.each(scriptLoadedCallbacks[url], function(callback) {
callback.func.call(callback.scope);
});
scriptLoadedCallbacks[url] = undefined;
};
queueLoadedCallbacks.push({
func : callback,
scope : scope || this
});
loadScripts = function() {
var loadingScripts = tinymce.grep(scripts);
// Current scripts has been handled
scripts.length = 0;
// Load scripts that needs to be loaded
tinymce.each(loadingScripts, function(url) {
// Script is already loaded then execute script callbacks directly
if (states[url] == LOADED) {
execScriptLoadedCallbacks(url);
return;
}
// Is script not loading then start loading it
if (states[url] != LOADING) {
states[url] = LOADING;
loading++;
loadScript(url, function() {
states[url] = LOADED;
loading--;
execScriptLoadedCallbacks(url);
// Load more scripts if they where added by the recently loaded script
loadScripts();
});
}
});
// No scripts are currently loading then execute all pending queue loaded callbacks
if (!loading) {
tinymce.each(queueLoadedCallbacks, function(callback) {
callback.func.call(callback.scope);
});
queueLoadedCallbacks.length = 0;
}
};
loadScripts();
};
};
// Global script loader
tinymce.ScriptLoader = new tinymce.dom.ScriptLoader();
})(tinymce);
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