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Diffstat (limited to 'dtrans/source/win32/clipb/WinClipbImpl.cxx')
| -rw-r--r-- | dtrans/source/win32/clipb/WinClipbImpl.cxx | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/dtrans/source/win32/clipb/WinClipbImpl.cxx b/dtrans/source/win32/clipb/WinClipbImpl.cxx new file mode 100644 index 000000000..8d59be7ca --- /dev/null +++ b/dtrans/source/win32/clipb/WinClipbImpl.cxx @@ -0,0 +1,210 @@ +/* -*- 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 . + */ + +#include <osl/diagnose.h> +#include "WinClipbImpl.hxx" + +#include <systools/win32/comtools.hxx> +#include "../../inc/DtObjFactory.hxx" +#include "../dtobj/APNDataObject.hxx" +#include "../dtobj/DOTransferable.hxx" +#include "WinClipboard.hxx" +#include <com/sun/star/datatransfer/clipboard/RenderingCapabilities.hpp> +#include "../dtobj/XNotifyingDataObject.hxx" + +#if !defined WIN32_LEAN_AND_MEAN +# define WIN32_LEAN_AND_MEAN +#endif +#include <windows.h> +#include <ole2.h> +#include <objidl.h> + +using namespace osl; +using namespace std; +using namespace cppu; + +using namespace com::sun::star::uno; +using namespace com::sun::star::datatransfer; +using namespace com::sun::star::datatransfer::clipboard; +using namespace com::sun::star::datatransfer::clipboard::RenderingCapabilities; + +// definition of static members +CWinClipbImpl* CWinClipbImpl::s_pCWinClipbImpl = nullptr; +osl::Mutex CWinClipbImpl::s_aMutex; + +CWinClipbImpl::CWinClipbImpl( const OUString& aClipboardName, CWinClipboard* theWinClipboard ) : + m_itsName( aClipboardName ), + m_pWinClipboard( theWinClipboard ), + m_pCurrentClipContent( nullptr ) +{ + OSL_ASSERT( nullptr != m_pWinClipboard ); + + // necessary to reassociate from + // the static callback function + s_pCWinClipbImpl = this; + registerClipboardViewer( ); +} + +CWinClipbImpl::~CWinClipbImpl( ) +{ + { + MutexGuard aGuard(s_aMutex); + s_pCWinClipbImpl = nullptr; + } + + unregisterClipboardViewer( ); +} + +Reference< XTransferable > CWinClipbImpl::getContents( ) +{ + // use the shortcut or create a transferable from + // system clipboard + { + MutexGuard aGuard(m_ClipContentMutex); + + if (nullptr != m_pCurrentClipContent) + { + return m_pCurrentClipContent->m_XTransferable; + } + + // Content cached? + if (m_foreignContent.is()) + return m_foreignContent; + + // release the mutex, so that the variable may be + // changed by other threads + } + + Reference< XTransferable > rClipContent; + + // get the current dataobject from clipboard + IDataObjectPtr pIDataObject; + HRESULT hr = m_MtaOleClipboard.getClipboard( &pIDataObject ); + + if ( SUCCEEDED( hr ) ) + { + // create an apartment neutral dataobject and initialize it with a + // com smart pointer to the IDataObject from clipboard + IDataObjectPtr pIDo( new CAPNDataObject( pIDataObject ) ); + + // remember pIDo destroys itself due to the smart pointer + rClipContent = CDOTransferable::create( m_pWinClipboard->m_xContext, pIDo ); + + MutexGuard aGuard(m_ClipContentMutex); + m_foreignContent = rClipContent; + } + + return rClipContent; +} + +void CWinClipbImpl::setContents( + const Reference< XTransferable >& xTransferable, + const Reference< XClipboardOwner >& xClipboardOwner ) +{ + IDataObjectPtr pIDataObj; + + if ( xTransferable.is( ) ) + { + { + MutexGuard aGuard(m_ClipContentMutex); + + m_foreignContent.clear(); + + m_pCurrentClipContent + = new CXNotifyingDataObject(CDTransObjFactory::createDataObjFromTransferable( + m_pWinClipboard->m_xContext, xTransferable), + xTransferable, xClipboardOwner, this); + } + + pIDataObj = IDataObjectPtr( m_pCurrentClipContent ); + } + + m_MtaOleClipboard.setClipboard(pIDataObj.get()); +} + +OUString CWinClipbImpl::getName( ) +{ + return m_itsName; +} + +sal_Int8 CWinClipbImpl::getRenderingCapabilities( ) +{ + return ( Delayed | Persistant ); +} + +void CWinClipbImpl::flushClipboard( ) +{ + // actually it should be ClearableMutexGuard aGuard( m_ClipContentMutex ); + // but it does not work since FlushClipboard does a callback and frees DataObject + // which results in a deadlock in onReleaseDataObject. + // FlushClipboard had to be synchron in order to prevent shutdown until all + // clipboard-formats are rendered. + // The request is needed to prevent flushing if we are not clipboard owner (it is + // not known what happens if we flush but aren't clipboard owner). + // It may be possible to move the request to the clipboard STA thread by saving the + // DataObject and call OleIsCurrentClipboard before flushing. + + if ( nullptr != m_pCurrentClipContent ) + m_MtaOleClipboard.flushClipboard( ); +} + +void CWinClipbImpl::registerClipboardViewer( ) +{ + m_MtaOleClipboard.registerClipViewer( CWinClipbImpl::onClipboardContentChanged ); +} + +void CWinClipbImpl::unregisterClipboardViewer( ) +{ + m_MtaOleClipboard.registerClipViewer( nullptr ); +} + +void CWinClipbImpl::dispose() +{ + OSL_ENSURE( !m_pCurrentClipContent, "Clipboard was not flushed before shutdown!" ); +} + +void WINAPI CWinClipbImpl::onClipboardContentChanged() +{ + MutexGuard aGuard( s_aMutex ); + + // reassociation to instance through static member + if ( nullptr != s_pCWinClipbImpl ) + { + s_pCWinClipbImpl->m_foreignContent.clear(); + s_pCWinClipbImpl->m_pWinClipboard->notifyAllClipboardListener( ); + } +} + +void CWinClipbImpl::onReleaseDataObject( CXNotifyingDataObject* theCaller ) +{ + OSL_ASSERT( nullptr != theCaller ); + + if ( theCaller ) + theCaller->lostOwnership( ); + + // if the current caller is the one we currently + // hold, then set it to NULL because an external + // source must be the clipboardowner now + MutexGuard aGuard( m_ClipContentMutex ); + + if ( m_pCurrentClipContent == theCaller ) + m_pCurrentClipContent = nullptr; +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |