gecko/content/base/public/nsDOMEventTargetWrapperCache.h

95 lines
3.4 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Wellington Fernando de Macedo.
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Wellington Fernando de Macedo <wfernandom2004@gmail.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
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* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsDOMEventTargetWrapperCache_h__
#define nsDOMEventTargetWrapperCache_h__
#include "nsDOMEventTargetHelper.h"
#include "nsWrapperCache.h"
#include "nsIScriptContext.h"
// Base class intended to be used for objets like XMLHttpRequest,
// EventSource and WebSocket.
class nsDOMEventTargetWrapperCache : public nsDOMEventTargetHelper,
public nsWrapperCache
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(nsDOMEventTargetWrapperCache,
nsDOMEventTargetHelper)
void GetParentObject(nsIScriptGlobalObject **aParentObject)
{
if (mOwner) {
CallQueryInterface(mOwner, aParentObject);
}
else {
*aParentObject = nsnull;
}
}
static nsDOMEventTargetWrapperCache* FromSupports(nsISupports* aSupports)
{
nsIDOMEventTarget* target =
static_cast<nsIDOMEventTarget*>(aSupports);
#ifdef DEBUG
{
nsCOMPtr<nsIDOMEventTarget> target_qi =
do_QueryInterface(aSupports);
// If this assertion fires the QI implementation for the object in
// question doesn't use the nsIDOMEventTarget pointer as the
// nsISupports pointer. That must be fixed, or we'll crash...
NS_ASSERTION(target_qi == target, "Uh, fix QI!");
}
#endif
return static_cast<nsDOMEventTargetWrapperCache*>(target);
}
protected:
nsDOMEventTargetWrapperCache() : nsDOMEventTargetHelper(), nsWrapperCache() {}
virtual ~nsDOMEventTargetWrapperCache();
};
#endif // nsDOMEventTargetWrapperCache_h__