silverstripe-framework/thirdparty/tinymce/classes/dom/ScriptLoader.js

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/**
* $Id: ScriptLoader.js 1045 2009-03-04 20:03:18Z spocke $
*
* @author Moxiecode
* @copyright Copyright <EFBFBD> 2004-2008, Moxiecode Systems AB, All rights reserved.
*/
(function(tinymce) {
var each = tinymce.each, Event = tinymce.dom.Event;
/**#@+
* @class This class handles asynchronous/synchronous loading of JavaScript files it will execute callbacks when
* various items gets loaded. This class is useful to
* @member tinymce.dom.ScriptLoader
*/
tinymce.create('tinymce.dom.ScriptLoader', {
/**
* Constructs a new script loaded instance. Check the Wiki for more detailed information for this method.
*
* @constructor
* @param {Object} s Optional settings object for the ScriptLoaded.
*/
ScriptLoader : function(s) {
this.settings = s || {};
this.queue = [];
this.lookup = {};
},
/**#@+
* @method
*/
/**
* Returns true/false if a script has been loaded or not.
*
* @param {String} u URL to check for.
*/
isDone : function(u) {
return this.lookup[u] ? this.lookup[u].state == 2 : 0;
},
/**
* 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.
*
* @param {string} u Absolute URL to the script to mark as loaded.
*/
markDone : function(u) {
this.lookup[u] = {state : 2, url : u};
},
/**
* Adds a specific script to the load queue of the script loader.
*
* @param {String} u Absolute URL to script to add.
* @param {function} cb Optional callback function to execute ones this script gets loaded.
* @param {Object} s Optional scope to execute callback in.
* @param {bool} pr Optional state to add to top or bottom of load queue. Defaults to bottom.
* @return {object} Load queue object contains, state, url and callback.
*/
add : function(u, cb, s, pr) {
var t = this, lo = t.lookup, o;
if (o = lo[u]) {
// Is loaded fire callback
if (cb && o.state == 2)
cb.call(s || this);
return o;
}
o = {state : 0, url : u, func : cb, scope : s || this};
if (pr)
t.queue.unshift(o);
else
t.queue.push(o);
lo[u] = o;
return o;
},
/**
* Loads a specific script directly without adding it to the load queue.
*
* @param {String} u Absolute URL to script to add.
* @param {function} cb Optional callback function to execute ones this script gets loaded.
* @param {Object} s Optional scope to execute callback in.
*/
load : function(u, cb, s) {
var t = this, o;
if (o = t.lookup[u]) {
// Is loaded fire callback
if (cb && o.state == 2)
cb.call(s || t);
return o;
}
function loadScript(u) {
if (Event.domLoaded || t.settings.strict_mode) {
tinymce.util.XHR.send({
url : tinymce._addVer(u),
error : t.settings.error,
async : false,
success : function(co) {
t.eval(co);
}
});
} else
document.write('<script type="text/javascript" src="' + tinymce._addVer(u) + '"></script>');
};
if (!tinymce.is(u, 'string')) {
each(u, function(u) {
loadScript(u);
});
if (cb)
cb.call(s || t);
} else {
loadScript(u);
if (cb)
cb.call(s || t);
}
},
/**
* Starts the loading of the queue.
*
* @param {function} cb Optional callback to execute when all queued items are loaded.
* @param {Object} s Optional scope to execute the callback in.
*/
loadQueue : function(cb, s) {
var t = this;
if (!t.queueLoading) {
t.queueLoading = 1;
t.queueCallbacks = [];
t.loadScripts(t.queue, function() {
t.queueLoading = 0;
if (cb)
cb.call(s || t);
each(t.queueCallbacks, function(o) {
o.func.call(o.scope);
});
});
} else if (cb)
t.queueCallbacks.push({func : cb, scope : s || t});
},
/**
* Evaluates the specified string inside the global namespace/window scope.
*
* @param {string} Script contents to evaluate.
*/
eval : function(co) {
var w = window;
// Evaluate script
if (!w.execScript) {
try {
eval.call(w, co);
} catch (ex) {
eval(co, w); // Firefox 3.0a8
}
} else
w.execScript(co); // IE
},
/**
* 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.
*
* @param {Array} sc Array of queue items to load.
* @param {function} cb Optional callback to execute ones all items are loaded.
* @param {Object} s Optional scope to execute callback in.
*/
loadScripts : function(sc, cb, s) {
var t = this, lo = t.lookup;
function done(o) {
o.state = 2; // Has been loaded
// Run callback
if (o.func)
o.func.call(o.scope || t);
};
function allDone() {
var l;
// Check if all files are loaded
l = sc.length;
each(sc, function(o) {
o = lo[o.url];
if (o.state === 2) {// It has finished loading
done(o);
l--;
} else
load(o);
});
// They are all loaded
if (l === 0 && cb) {
cb.call(s || t);
cb = 0;
}
};
function load(o) {
if (o.state > 0)
return;
o.state = 1; // Is loading
tinymce.dom.ScriptLoader.loadScript(o.url, function() {
done(o);
allDone();
});
/*
tinymce.util.XHR.send({
url : o.url,
error : t.settings.error,
success : function(co) {
t.eval(co);
done(o);
allDone();
}
});
*/
};
each(sc, function(o) {
var u = o.url;
// Add to queue if needed
if (!lo[u]) {
lo[u] = o;
t.queue.push(o);
} else
o = lo[u];
// Is already loading or has been loaded
if (o.state > 0)
return;
if (!Event.domLoaded && !t.settings.strict_mode) {
var ix, ol = '';
// Add onload events
if (cb || o.func) {
o.state = 1; // Is loading
ix = tinymce.dom.ScriptLoader._addOnLoad(function() {
done(o);
allDone();
});
if (tinymce.isIE)
ol = ' onreadystatechange="';
else
ol = ' onload="';
ol += 'tinymce.dom.ScriptLoader._onLoad(this,\'' + u + '\',' + ix + ');"';
}
document.write('<script type="text/javascript" src="' + tinymce._addVer(u) + '"' + ol + '></script>');
if (!o.func)
done(o);
} else
load(o);
});
allDone();
},
// Static methods
'static' : {
_addOnLoad : function(f) {
var t = this;
t._funcs = t._funcs || [];
t._funcs.push(f);
return t._funcs.length - 1;
},
_onLoad : function(e, u, ix) {
if (!tinymce.isIE || e.readyState == 'complete')
this._funcs[ix].call(this);
},
/**
* Loads the specified script without adding it to any load queue.
*
* @param {string} u URL to dynamically load.
* @param {function} cb Callback function to executed on load.
*/
loadScript : function(u, cb) {
var id = tinymce.DOM.uniqueId(), e;
function done() {
Event.clear(id);
tinymce.DOM.remove(id);
if (cb) {
cb.call(document, u);
cb = 0;
}
};
if (tinymce.isIE) {
/* Event.add(e, 'readystatechange', function(e) {
if (e.target && e.target.readyState == 'complete')
done();
});*/
tinymce.util.XHR.send({
url : tinymce._addVer(u),
async : false,
success : function(co) {
window.execScript(co);
done();
}
});
} else {
e = tinymce.DOM.create('script', {id : id, type : 'text/javascript', src : tinymce._addVer(u)});
Event.add(e, 'load', done);
// Check for head or body
(document.getElementsByTagName('head')[0] || document.body).appendChild(e);
}
}
}
/**#@-*/
});
// Global script loader
tinymce.ScriptLoader = new tinymce.dom.ScriptLoader();
})(tinymce);