michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsAutoCopyListener_h_
michael@0: #define nsAutoCopyListener_h_
michael@0: 
michael@0: #include "nsISelectionListener.h"
michael@0: #include "nsISelectionPrivate.h"
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: class nsAutoCopyListener MOZ_FINAL : public nsISelectionListener
michael@0: {
michael@0: public:
michael@0:   NS_DECL_ISUPPORTS
michael@0:   NS_DECL_NSISELECTIONLISTENER
michael@0: 
michael@0:   void Listen(nsISelectionPrivate *aSelection)
michael@0:   {
michael@0:       NS_ASSERTION(aSelection, "Null selection passed to Listen()");
michael@0:       aSelection->AddSelectionListener(this);
michael@0:   }
michael@0: 
michael@0:   static nsAutoCopyListener* GetInstance()
michael@0:   {
michael@0:     if (!sInstance) {
michael@0:       sInstance = new nsAutoCopyListener();
michael@0: 
michael@0:       NS_ADDREF(sInstance);
michael@0:     }
michael@0: 
michael@0:     return sInstance;
michael@0:   }
michael@0: 
michael@0:   static void Shutdown()
michael@0:   {
michael@0:     NS_IF_RELEASE(sInstance);
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   static nsAutoCopyListener* sInstance;
michael@0: };
michael@0: 
michael@0: #endif