gecko/layout/generic/nsAutoCopyListener.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 Communicator client code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* 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
* and other provisions required by the GPL or the LGPL. If you do not delete
* 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 nsAutoCopyListener_h_
#define nsAutoCopyListener_h_
#include "nsISelectionListener.h"
#include "nsISelectionPrivate.h"
class nsAutoCopyListener : public nsISelectionListener
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSISELECTIONLISTENER
void Listen(nsISelectionPrivate *aSelection)
{
NS_ASSERTION(aSelection, "Null selection passed to Listen()");
aSelection->AddSelectionListener(this);
}
static nsAutoCopyListener* GetInstance()
{
if (!sInstance) {
sInstance = new nsAutoCopyListener();
if (!sInstance)
return nsnull;
NS_ADDREF(sInstance);
}
return sInstance;
}
static void Shutdown()
{
NS_IF_RELEASE(sInstance);
}
private:
static nsAutoCopyListener* sInstance;
};
#endif