0621fd1501b8d71d0e1bded398033afedfee817a
[WebKit-https.git] / WebCore / inspector / front-end / Callback.js
1 /*
2  * Copyright (C) 2009 Google Inc. All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  */
30
31 WebInspector.Callback = function()
32 {
33     this._lastCallbackId = 1;
34     this._callbacks = {};
35 }
36
37 WebInspector.Callback.prototype = {
38     wrap: function(callback)
39     {
40         var callbackId = this._lastCallbackId++;
41         this._callbacks[callbackId] = callback || function() {};
42         return callbackId;
43     },
44
45     processResponse: function(callbackId, args)
46     {
47         var callback = this._callbacks[callbackId];
48         callback.apply(null, args);
49         delete this._callbacks[callbackId];
50     },
51
52     removeResponseCallbackEntry: function(callbackId)
53     {
54         delete this._callbacks[callbackId];
55     }
56 }
57
58 WebInspector.Callback._INSTANCE = new WebInspector.Callback();
59 WebInspector.Callback.wrap = WebInspector.Callback._INSTANCE.wrap.bind(WebInspector.Callback._INSTANCE);
60 WebInspector.processResponse = WebInspector.Callback._INSTANCE.processResponse.bind(WebInspector.Callback._INSTANCE);
61 WebInspector.removeResponseCallbackEntry = WebInspector.Callback._INSTANCE.removeResponseCallbackEntry.bind(WebInspector.Callback._INSTANCE);