big-moving.ru/api/soft/ajaxorg/lib/ace/renderloop.js

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2.9 KiB
JavaScript
Executable File

/* ***** BEGIN LICENSE BLOCK *****
* Distributed under the BSD license:
*
* Copyright (c) 2010, Ajax.org B.V.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Ajax.org B.V. nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ***** END LICENSE BLOCK ***** */
define(function(require, exports, module) {
"use strict";
var event = require("./lib/event");
/**
*
*
* Batches changes (that force something to be redrawn) in the background.
* @class RenderLoop
**/
var RenderLoop = function(onRender, win) {
this.onRender = onRender;
this.pending = false;
this.changes = 0;
this.$recursionLimit = 2;
this.window = win || window;
var _self = this;
this._flush = function(ts) {
_self.pending = false;
var changes = _self.changes;
if (changes) {
event.blockIdle(100);
_self.changes = 0;
_self.onRender(changes);
}
if (_self.changes) {
if (_self.$recursionLimit-- < 0) return;
_self.schedule();
} else {
_self.$recursionLimit = 2;
}
};
};
(function() {
this.schedule = function(change) {
this.changes = this.changes | change;
if (this.changes && !this.pending) {
event.nextFrame(this._flush);
this.pending = true;
}
};
this.clear = function(change) {
var changes = this.changes;
this.changes = 0;
return changes;
};
}).call(RenderLoop.prototype);
exports.RenderLoop = RenderLoop;
});