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.Callback.processResponse = WebInspector.Callback._INSTANCE.processResponse.bind(WebInspector.Callback._INSTANCE);
  61 WebInspector.Callback.removeResponseCallbackEntry = WebInspector.Callback._INSTANCE.removeResponseCallbackEntry.bind(WebInspector.Callback._INSTANCE);