/**
* ReflowQueue.js
*
* Released under LGPL License.
* Copyright (c) 1999-2015 Ephox Corp. All rights reserved
*
* License: http://www.tinymce.com/license
* Contributing: http://www.tinymce.com/contributing
*/
/**
* This class will automatically reflow controls on the next animation frame within a few milliseconds on older browsers.
* If the user manually reflows then the automatic reflow will be cancelled. This class is unsed internally when various control states
* changes that triggers a reflow.
*
* @class tinymce.ui.ReflowQueue
* @static
*/
define("tinymce/ui/ReflowQueue", [
], function() {
var dirtyCtrls = {}, animationFrameRequested;
function requestAnimationFrame(callback, element) {
var i, requestAnimationFrameFunc = window.requestAnimationFrame, vendors = ['ms', 'moz', 'webkit'];
function featurefill(callback) {
window.setTimeout(callback, 0);
}
for (i = 0; i < vendors.length && !requestAnimationFrameFunc; i++) {
requestAnimationFrameFunc = window[vendors[i] + 'RequestAnimationFrame'];
}
if (!requestAnimationFrameFunc) {
requestAnimationFrameFunc = featurefill;
}
requestAnimationFrameFunc(callback, element);
}
return {
/**
* Adds a control to the next automatic reflow call. This is the control that had a state
* change for example if the control was hidden/shown.
*
* @method add
* @param {tinymce.ui.Control} ctrl Control to add to queue.
*/
add: function(ctrl) {
var parent = ctrl.parent();
if (parent) {
if (!parent._layout || parent._layout.isNative()) {
return;
}
if (!dirtyCtrls[parent._id]) {
dirtyCtrls[parent._id] = parent;
}
if (!animationFrameRequested) {
animationFrameRequested = true;
requestAnimationFrame(function() {
var id, ctrl;
animationFrameRequested = false;
for (id in dirtyCtrls) {
ctrl = dirtyCtrls[id];
if (ctrl.state.get('rendered')) {
ctrl.reflow();
}
}
dirtyCtrls = {};
}, document.body);
}
}
},
/**
* Removes the specified control from the automatic reflow. This will happen when for example the user
* manually triggers a reflow.
*
* @method remove
* @param {tinymce.ui.Control} ctrl Control to remove from queue.
*/
remove: function(ctrl) {
if (dirtyCtrls[ctrl._id]) {
delete dirtyCtrls[ctrl._id];
}
}
};
});
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