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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
#pragma once
#include <sal/types.h>
#include <mutex>
#include <objidl.h>
// the Mta-Ole clipboard class is for internal use only!
// only one instance of this class should be created, the
// user has to ensure this!
// the class is not thread-safe because it will be used
// only from within the clipboard service and the methods
// of the clipboard service are already synchronized
class CMtaOleClipboard
{
public:
typedef void ( WINAPI *LPFNC_CLIPVIEWER_CALLBACK_t )( void );
public:
CMtaOleClipboard( );
~CMtaOleClipboard( );
// clipboard functions
HRESULT setClipboard( IDataObject* pIDataObject );
HRESULT getClipboard( IDataObject** ppIDataObject );
HRESULT flushClipboard( );
// register/unregister a clipboard viewer; there can only
// be one at a time; parameter NULL means unregister
// a clipboard viewer
// returns true on success else false; use GetLastError( ) in
// false case
bool registerClipViewer( LPFNC_CLIPVIEWER_CALLBACK_t pfncClipViewerCallback );
private:
unsigned int run( );
// create a hidden window which serves as a request target; so we
// guarantee synchronization
void createMtaOleReqWnd( );
// message support
bool postMessage( UINT msg, WPARAM wParam = 0, LPARAM lParam = 0 );
LRESULT sendMessage( UINT msg, WPARAM wParam = 0, LPARAM lParam = 0 );
// message handler functions; remember these functions are called
// from a different thread context!
static HRESULT onSetClipboard( IDataObject* pIDataObject );
static HRESULT onGetClipboard( LPSTREAM* ppStream );
static HRESULT onFlushClipboard( );
bool onRegisterClipViewer( LPFNC_CLIPVIEWER_CALLBACK_t pfncClipViewerCallback );
// win32 clipboard listener support
LRESULT onClipboardUpdate();
static LRESULT CALLBACK mtaOleReqWndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
static unsigned __stdcall oleThreadProc(void* pParam);
static unsigned __stdcall clipboardChangedNotifierThreadProc(void* pParam);
bool WaitForThreadReady( ) const;
private:
HANDLE m_hOleThread;
unsigned m_uOleThreadId;
HANDLE m_hEvtThrdReady;
HWND m_hwndMtaOleReqWnd;
HANDLE m_hEvtWndDisposed;
ATOM m_MtaOleReqWndClassAtom;
LPFNC_CLIPVIEWER_CALLBACK_t m_pfncClipViewerCallback;
bool m_bInRegisterClipViewer;
bool m_bRunClipboardNotifierThread;
HANDLE m_hClipboardChangedNotifierThread;
HANDLE m_hClipboardChangedNotifierEvents[2];
HANDLE& m_hClipboardChangedEvent;
HANDLE& m_hTerminateClipboardChangedNotifierEvent;
std::mutex m_ClipboardChangedEventCountMutex;
sal_Int32 m_ClipboardChangedEventCount;
std::mutex m_pfncClipViewerCallbackMutex;
static CMtaOleClipboard* s_theMtaOleClipboardInst;
CMtaOleClipboard( const CMtaOleClipboard& ) = delete;
CMtaOleClipboard& operator=( const CMtaOleClipboard& ) = delete;
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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