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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 .
+ */
+
+#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: */