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/*
* Copyright (C) 2013 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS CONTRIBUTORS
* 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.
*/
WebInspector.EventHandler = function(delegate, eventHandlers)
{
this._delegate = delegate;
this._eventHandlers = eventHandlers;
this._tracking = false;
this._target = null;
};
WebInspector.EventHandler.prototype = {
constructor: WebInspector.EventHandler,
// Public
trackEvents: function(target)
{
if (this._tracking && target === this._target)
return;
if (this._tracking && this._target)
this.stopTrackingEvents();
Object.getOwnPropertyNames(this._eventHandlers).forEach(function(eventName) {
target.addEventListener(eventName, this);
}, this);
this._target = target;
this._tracking = true;
},
stopTrackingEvents: function()
{
if (!this._tracking)
return;
Object.getOwnPropertyNames(this._eventHandlers).forEach(function(eventType) {
this._target.removeEventListener(eventType, this);
}, this);
this._tracking = false;
},
handleEvent: function(event)
{
if (event.currentTarget !== this._target)
return;
var handler = this._eventHandlers[event.type];
if (handler)
handler.call(this._delegate, event);
}
}
WebInspector.EventHandler.prototype.__proto__ = WebInspector.Object.prototype;
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