@qooxdoo/framework
Version:
The JS Framework for Coders
80 lines (66 loc) • 1.99 kB
JavaScript
/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2004-2008 1&1 Internet AG, Germany, http://www.1und1.de
License:
MIT: https://opensource.org/licenses/MIT
See the LICENSE file in the project's top-level directory for details.
Authors:
* Sebastian Werner (wpbasti)
* Fabian Jakobs (fjakobs)
************************************************************************ */
/**
* The DisposeQueue registers all widgets which are should be disposed.
* This queue makes it possible to remove widgets from the DOM using
* the layout and element queues and dispose them afterwards.
*/
qx.Class.define("qx.ui.core.queue.Dispose", {
statics: {
/** @type {Array} This contains all the queued widgets for the next flush. */
__queue: [],
/**
* Adds a widget to the queue.
*
* Should only be used by {@link qx.ui.core.Widget}.
*
* @param widget {qx.ui.core.Widget} The widget to add.
*/
add(widget) {
var queue = this.__queue;
if (queue.includes(widget)) {
return;
}
queue.unshift(widget);
qx.ui.core.queue.Manager.scheduleFlush("dispose");
},
/**
* Whether the dispose queue is empty
* @return {Boolean}
* @internal
*/
isEmpty() {
return this.__queue.length == 0;
},
/**
* Flushes the dispose queue.
*
* This is used exclusively by the {@link qx.ui.core.queue.Manager}.
*/
flush() {
// Dispose all registered objects
var queue = this.__queue;
for (var i = queue.length - 1; i >= 0; i--) {
var widget = queue[i];
queue.splice(i, 1);
widget.dispose();
}
// Empty check
if (queue.length != 0) {
return;
}
// Recreate the array is cheaper compared to keep a sparse array over time
this.__queue = [];
}
}
});