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define("dijit/Destroyable", [
"dojo/_base/array", // array.forEach array.map
"dojo/aspect",
"dojo/_base/declare"
], function(array, aspect, declare){
// module:
// dijit/Destroyable
return declare("dijit.Destroyable", null, {
// summary:
// Mixin to track handles and release them when instance is destroyed.
// description:
// Call this.own(...) on list of handles (returned from dojo/aspect, dojo/on,
// dojo/Stateful::watch, or any class (including widgets) with a destroyRecursive() or destroy() method.
// Then call destroy() later to destroy this instance and release the resources.
destroy: function(/*Boolean*/ preserveDom){
// summary:
// Destroy this class, releasing any resources registered via own().
this._destroyed = true;
},
own: function(){
// summary:
// Track specified handles and remove/destroy them when this instance is destroyed, unless they were
// already removed/destroyed manually.
// tags:
// protected
// returns:
// The array of specified handles, so you can do for example:
// | var handle = this.own(on(...))[0];
array.forEach(arguments, function(handle){
var destroyMethodName =
"destroyRecursive" in handle ? "destroyRecursive" : // remove "destroyRecursive" for 2.0
"destroy" in handle ? "destroy" :
"remove";
// When this.destroy() is called, destroy handle. Since I'm using aspect.before(),
// the handle will be destroyed before a subclass's destroy() method starts running, before it calls
// this.inherited() or even if it doesn't call this.inherited() at all. If that's an issue, make an
// onDestroy() method and connect to that instead.
var odh = aspect.before(this, "destroy", function(preserveDom){
handle[destroyMethodName](preserveDom);
});
// If handle is destroyed manually before this.destroy() is called, remove the listener set directly above.
var hdh = aspect.after(handle, destroyMethodName, function(){
odh.remove();
hdh.remove();
}, true);
}, this);
return arguments; // handle
}
});
});
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