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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 | Persistent );
}
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: */
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