xref: /aoo41x/main/dtrans/source/win32/dtobj/DOTransferable.cxx (revision a206ee71)

/**************************************************************
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_dtrans.hxx"

//------------------------------------------------------------------------
// includes
//------------------------------------------------------------------------
#include <sal/types.h>
#include <rtl/process.h>

#ifndef _DOWRAPPERTRANSFERABLE_HXX_
#include "DOTransferable.hxx"
#endif
#include "..\misc\ImplHelper.hxx"
#include "..\misc\WinClip.hxx"
#include "DTransHelper.hxx"
#include "..\misc\ImplHelper.hxx"
#include "TxtCnvtHlp.hxx"
#include "MimeAttrib.hxx"
#include "FmtFilter.hxx"
#include "Fetc.hxx"


#if(_MSC_VER < 1300) && !defined(__MINGW32__)
#include <olestd.h>
#endif

#define STR2(x) #x
#define STR(x) STR2(x)
#define PRAGMA_MSG( msg ) message( __FILE__ "(" STR(__LINE__) "): " #msg )

//------------------------------------------------------------------------
// namespace directives
//------------------------------------------------------------------------

using namespace rtl;
using namespace std;
using namespace osl;
using namespace cppu;
using namespace com::sun::star::uno;
using namespace com::sun::star::datatransfer;
using namespace com::sun::star::io;
using namespace com::sun::star::lang;
using namespace com::sun::star::container;

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

namespace
{
	const Type CPPUTYPE_SEQINT8  = getCppuType( ( Sequence< sal_Int8 >* )0 );
	const Type CPPUTYPE_OUSTRING = getCppuType( (OUString*)0 );

	inline
	sal_Bool isValidFlavor( const DataFlavor& aFlavor )
	{
		return ( aFlavor.MimeType.getLength( ) &&
				 ( ( aFlavor.DataType ==  CPPUTYPE_SEQINT8 ) ||
				 ( aFlavor.DataType == CPPUTYPE_OUSTRING ) ) );
	}

} // end namespace


//------------------------------------------------------------------------
// ctor
//------------------------------------------------------------------------

CDOTransferable::CDOTransferable(
	const Reference< XMultiServiceFactory >& ServiceManager, IDataObjectPtr rDataObject ) :
	m_rDataObject( rDataObject ),
	m_SrvMgr( ServiceManager ),
	m_DataFormatTranslator( m_SrvMgr ),
	m_bUnicodeRegistered( sal_False ),
	m_TxtFormatOnClipboard( CF_INVALID )
{
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

Any SAL_CALL CDOTransferable::getTransferData( const DataFlavor& aFlavor )
		throw( UnsupportedFlavorException, IOException, RuntimeException )
{
	OSL_ASSERT( isValidFlavor( aFlavor ) );

	MutexGuard aGuard( m_aMutex );

	//------------------------------------------------
	// convert dataflavor to formatetc
	//------------------------------------------------

	CFormatEtc fetc = m_DataFormatTranslator.getFormatEtcFromDataFlavor( aFlavor );
	OSL_ASSERT( CF_INVALID != fetc.getClipformat() );

	//------------------------------------------------
	//	get the data from clipboard in a byte stream
	//------------------------------------------------

	ByteSequence_t clipDataStream;

	try
	{
		clipDataStream = getClipboardData( fetc );
	}
	catch( UnsupportedFlavorException& )
	{
		if ( m_DataFormatTranslator.isUnicodeTextFormat( fetc.getClipformat( ) ) &&
			 m_bUnicodeRegistered )
		{
			 OUString aUnicodeText = synthesizeUnicodeText( );
			 Any aAny = makeAny( aUnicodeText );
			 return aAny;
		}
        // #124085# CF_DIBV5 should not be possible, but keep for reading from the
        // clipboard for being on the safe side
        else if(CF_DIBV5 == fetc.getClipformat())
        {
            // #123407# CF_DIBV5 has priority; if the try to fetch this failed,
            // check CF_DIB availability as an alternative
            fetc.setClipformat(CF_DIB);

            try
            {
                clipDataStream = getClipboardData( fetc );
            }
            catch( UnsupportedFlavorException& )
            {
                throw; // pass through, tried all possibilities
            }
        }
		else
			throw; // pass through exception
	}

	//------------------------------------------------
	// return the data as any
	//------------------------------------------------

	return byteStreamToAny( clipDataStream, aFlavor.DataType );
}

//------------------------------------------------------------------------
// getTransferDataFlavors
//------------------------------------------------------------------------

Sequence< DataFlavor > SAL_CALL CDOTransferable::getTransferDataFlavors(  )
	throw( RuntimeException )
{
	return m_FlavorList;
}

//------------------------------------------------------------------------
// isDataFlavorSupported
// returns true if we find a DataFlavor with the same MimeType and
// DataType
//------------------------------------------------------------------------

sal_Bool SAL_CALL CDOTransferable::isDataFlavorSupported( const DataFlavor& aFlavor )
	throw( RuntimeException )
{
	OSL_ASSERT( isValidFlavor( aFlavor ) );

	for ( sal_Int32 i = 0; i < m_FlavorList.getLength( ); i++ )
		if ( compareDataFlavors( aFlavor, m_FlavorList[i] ) )
			return sal_True;

	return sal_False;
}

//------------------------------------------------------------------------
// helper function
// the list of datafalvors currently on the clipboard will be initialized
// only once; if the client of this Transferable will hold a reference
// to it und the underlying clipboard content changes, the client does
// possible operate on a invalid list
// if there is only text on the clipboard we will also offer unicode text
// an synthesize this format on the fly if requested, to accomplish this
// we save the first offered text format which we will later use for the
// conversion
//------------------------------------------------------------------------

void SAL_CALL CDOTransferable::initFlavorList( )
{
	IEnumFORMATETCPtr pEnumFormatEtc;
	HRESULT hr = m_rDataObject->EnumFormatEtc( DATADIR_GET, &pEnumFormatEtc );
	if ( SUCCEEDED( hr ) )
	{
		pEnumFormatEtc->Reset( );

		FORMATETC fetc;
		while ( S_FALSE != pEnumFormatEtc->Next( 1, &fetc, NULL ) )
		{
			// we use locales only to determine the
			// charset if there is text on the cliboard
			// we don't offer this format
			if ( CF_LOCALE == fetc.cfFormat )
				continue;

			DataFlavor aFlavor = formatEtcToDataFlavor( fetc );

			// if text or oemtext is offered we also pretend to have unicode text
			if ( m_DataFormatTranslator.isOemOrAnsiTextFormat( fetc.cfFormat ) &&
				 !m_bUnicodeRegistered )
			{
				addSupportedFlavor( aFlavor );

				m_TxtFormatOnClipboard = fetc.cfFormat;
				m_bUnicodeRegistered   = sal_True;

				// register unicode text as accompany format
				aFlavor = formatEtcToDataFlavor(
					m_DataFormatTranslator.getFormatEtcForClipformat( CF_UNICODETEXT ) );
				addSupportedFlavor( aFlavor );
			}
			else if ( (CF_UNICODETEXT == fetc.cfFormat) && !m_bUnicodeRegistered )
			{
				addSupportedFlavor( aFlavor );
				m_bUnicodeRegistered = sal_True;
			}
			else
				addSupportedFlavor( aFlavor );

			// see MSDN IEnumFORMATETC
			CoTaskMemFree( fetc.ptd );
		}
	}
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

inline
void SAL_CALL CDOTransferable::addSupportedFlavor( const DataFlavor& aFlavor )
{
	// we ignore all formats that couldn't be translated
	if ( aFlavor.MimeType.getLength( ) )
	{
		OSL_ASSERT( isValidFlavor( aFlavor ) );

		m_FlavorList.realloc( m_FlavorList.getLength( ) + 1 );
		m_FlavorList[m_FlavorList.getLength( ) - 1] = aFlavor;
	}
}

//------------------------------------------------------------------------
// helper function
//------------------------------------------------------------------------

//inline
DataFlavor SAL_CALL CDOTransferable::formatEtcToDataFlavor( const FORMATETC& aFormatEtc )
{
	DataFlavor aFlavor;
	LCID lcid = 0;

	// for non-unicode text format we must provid a locale to get
	// the character-set of the text, if there is no locale on the
	// clipboard we assume the text is in a charset appropriate for
	// the current thread locale
	if ( (CF_TEXT == aFormatEtc.cfFormat) || (CF_OEMTEXT == aFormatEtc.cfFormat) )
		lcid = getLocaleFromClipboard( );

	return m_DataFormatTranslator.getDataFlavorFromFormatEtc( aFormatEtc, lcid );
}

//------------------------------------------------------------------------
// returns the current locale on clipboard; if there is no locale on
// clipboard the function returns the current thread locale
//------------------------------------------------------------------------

LCID SAL_CALL CDOTransferable::getLocaleFromClipboard( )
{
	LCID lcid = GetThreadLocale( );

	try
	{
		CFormatEtc fetc = m_DataFormatTranslator.getFormatEtcForClipformat( CF_LOCALE );
		ByteSequence_t aLCIDSeq = getClipboardData( fetc );
		lcid = *(reinterpret_cast<LCID*>( aLCIDSeq.getArray( ) ) );

		// because of a Win95/98 Bug; there the high word
		// of a locale has the same value as the
		// low word e.g. 0x07040704 that's not right
		// correct is 0x00000704
		lcid &= 0x0000FFFF;
	}
	catch(...)
	{
		// we take the default locale
	}

	return lcid;
}

//------------------------------------------------------------------------
// i think it's not necessary to call ReleaseStgMedium
// in case of failures because nothing should have been
// allocated etc.
//------------------------------------------------------------------------

CDOTransferable::ByteSequence_t SAL_CALL CDOTransferable::getClipboardData( CFormatEtc& aFormatEtc )
{
	STGMEDIUM stgmedium;
	HRESULT hr = m_rDataObject->GetData( aFormatEtc, &stgmedium );

	// in case of failure to get a WMF metafile handle, try to get a memory block
	if( FAILED( hr ) &&
	    ( CF_METAFILEPICT == aFormatEtc.getClipformat() ) &&
	    ( TYMED_MFPICT == aFormatEtc.getTymed() ) )
	{
        CFormatEtc aTempFormat( aFormatEtc );
	    aTempFormat.setTymed( TYMED_HGLOBAL );
	    hr = m_rDataObject->GetData( aTempFormat, &stgmedium );
	}

	if ( FAILED( hr ) )
	{
		OSL_ASSERT( (hr != E_INVALIDARG) &&
			        (hr != DV_E_DVASPECT) &&
					(hr != DV_E_LINDEX) &&
					(hr != DV_E_TYMED) );

		if ( DV_E_FORMATETC == hr )
			throw UnsupportedFlavorException( );
		else if ( STG_E_MEDIUMFULL == hr )
			throw IOException( );
		else
			throw RuntimeException( );
	}

	ByteSequence_t byteStream;

	try
	{
		if ( CF_ENHMETAFILE == aFormatEtc.getClipformat() )
			byteStream = WinENHMFPictToOOMFPict( stgmedium.hEnhMetaFile );
        else if (CF_HDROP == aFormatEtc.getClipformat())
			byteStream = CF_HDROPToFileList(stgmedium.hGlobal);
        else if ( CF_BITMAP == aFormatEtc.getClipformat() )
        {
            byteStream = WinBITMAPToOOBMP(stgmedium.hBitmap);
            if( aFormatEtc.getTymed() == TYMED_GDI &&
                ! stgmedium.pUnkForRelease )
            {
                DeleteObject(stgmedium.hBitmap);
            }
        }
		else
		{
			clipDataToByteStream( aFormatEtc.getClipformat( ), stgmedium, byteStream );

			// format conversion if necessary
            // #124085# DIBV5 should not happen currently, but keep as a hint here
			if(CF_DIBV5 == aFormatEtc.getClipformat() || CF_DIB == aFormatEtc.getClipformat())
            {
				byteStream = WinDIBToOOBMP(byteStream);
            }
			else if(CF_METAFILEPICT == aFormatEtc.getClipformat())
            {
				byteStream = WinMFPictToOOMFPict(byteStream);
            }
		}

		ReleaseStgMedium( &stgmedium );
	}
	catch( CStgTransferHelper::CStgTransferException& )
	{
		ReleaseStgMedium( &stgmedium );
		throw IOException( );
	}

	return byteStream;
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

OUString SAL_CALL CDOTransferable::synthesizeUnicodeText( )
{
	ByteSequence_t aTextSequence;
	CFormatEtc	   fetc;
	LCID		   lcid = getLocaleFromClipboard( );
	sal_uInt32	   cpForTxtCnvt = 0;

	if ( CF_TEXT == m_TxtFormatOnClipboard )
	{
		fetc = m_DataFormatTranslator.getFormatEtcForClipformat( CF_TEXT );
		aTextSequence = getClipboardData( fetc );

		// determine the codepage used for text conversion
		cpForTxtCnvt = getWinCPFromLocaleId( lcid, LOCALE_IDEFAULTANSICODEPAGE ).toInt32( );
	}
	else if ( CF_OEMTEXT == m_TxtFormatOnClipboard )
	{
		fetc = m_DataFormatTranslator.getFormatEtcForClipformat( CF_OEMTEXT );
		aTextSequence = getClipboardData( fetc );

		// determine the codepage used for text conversion
		cpForTxtCnvt = getWinCPFromLocaleId( lcid, LOCALE_IDEFAULTCODEPAGE ).toInt32( );
	}
	else
		OSL_ASSERT( sal_False );

	CStgTransferHelper stgTransferHelper;

	// convert the text
	MultiByteToWideCharEx( cpForTxtCnvt,
						   reinterpret_cast<char*>( aTextSequence.getArray( ) ),
                           sal::static_int_cast<sal_uInt32>(-1), // Huh ?
                           stgTransferHelper,
                           sal_False);

	CRawHGlobalPtr	ptrHGlob(stgTransferHelper);
	sal_Unicode*	pWChar = reinterpret_cast<sal_Unicode*>(ptrHGlob.GetMemPtr());

	return OUString(pWChar);
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

void CDOTransferable::clipDataToByteStream( CLIPFORMAT cf, STGMEDIUM stgmedium, ByteSequence_t& aByteSequence )
{
	CStgTransferHelper memTransferHelper;

	switch( stgmedium.tymed )
	{
	case TYMED_HGLOBAL:
		memTransferHelper.init( stgmedium.hGlobal );
		break;

	case TYMED_MFPICT:
		memTransferHelper.init( stgmedium.hMetaFilePict );
		break;

	case TYMED_ENHMF:
		memTransferHelper.init( stgmedium.hEnhMetaFile );
		break;

	case TYMED_ISTREAM:
		#ifdef _MSC_VER
		#pragma PRAGMA_MSG( Has to be implemented )
		#endif
		break;

	default:
		throw UnsupportedFlavorException( );
		break;
	}

	int nMemSize = memTransferHelper.memSize( cf );
	aByteSequence.realloc( nMemSize );
	memTransferHelper.read( aByteSequence.getArray( ), nMemSize );
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

inline
Any CDOTransferable::byteStreamToAny( ByteSequence_t& aByteStream, const Type& aRequestedDataType )
{
	Any aAny;

	if ( aRequestedDataType == CPPUTYPE_OUSTRING )
	{
		OUString str = byteStreamToOUString( aByteStream );
		aAny = makeAny(	str );
	}
	else
		aAny = makeAny( aByteStream );

	return aAny;
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

inline
OUString CDOTransferable::byteStreamToOUString( ByteSequence_t& aByteStream )
{
	sal_Int32 nWChars;
	sal_Int32 nMemSize = aByteStream.getLength( );

	// if there is a trailing L"\0" substract 1 from length
	if ( 0 == aByteStream[ aByteStream.getLength( ) - 2 ] &&
		 0 == aByteStream[ aByteStream.getLength( ) - 1 ] )
		nWChars = static_cast< sal_Int32 >( nMemSize / sizeof( sal_Unicode ) ) - 1;
	else
		nWChars = static_cast< sal_Int32 >( nMemSize / sizeof( sal_Unicode ) );

	return OUString( reinterpret_cast< sal_Unicode* >( aByteStream.getArray( ) ), nWChars );
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

sal_Bool SAL_CALL CDOTransferable::compareDataFlavors(
	const DataFlavor& lhs, const DataFlavor& rhs )
{
	if ( !m_rXMimeCntFactory.is( ) )
	{
		m_rXMimeCntFactory = Reference< XMimeContentTypeFactory >( m_SrvMgr->createInstance(
			OUString::createFromAscii( "com.sun.star.datatransfer.MimeContentTypeFactory" ) ), UNO_QUERY );
	}
	OSL_ASSERT( m_rXMimeCntFactory.is( ) );

	sal_Bool bRet = sal_False;

	try
	{
		Reference< XMimeContentType > xLhs( m_rXMimeCntFactory->createMimeContentType( lhs.MimeType ) );
		Reference< XMimeContentType > xRhs( m_rXMimeCntFactory->createMimeContentType( rhs.MimeType ) );

		if ( cmpFullMediaType( xLhs, xRhs ) )
		{
			bRet = cmpAllContentTypeParameter( xLhs, xRhs );
		}
	}
	catch( IllegalArgumentException& )
	{
		OSL_ENSURE( sal_False, "Invalid content type detected" );
		bRet = sal_False;
	}

	return bRet;
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

sal_Bool SAL_CALL CDOTransferable::cmpFullMediaType(
	const Reference< XMimeContentType >& xLhs, const Reference< XMimeContentType >& xRhs ) const
{
	return xLhs->getFullMediaType().equalsIgnoreAsciiCase( xRhs->getFullMediaType( ) );
}

//------------------------------------------------------------------------
//
//------------------------------------------------------------------------

sal_Bool SAL_CALL CDOTransferable::cmpAllContentTypeParameter(
	const Reference< XMimeContentType >& xLhs, const Reference< XMimeContentType >& xRhs ) const
{
	Sequence< OUString > xLhsFlavors = xLhs->getParameters( );
	Sequence< OUString > xRhsFlavors = xRhs->getParameters( );
	sal_Bool bRet = sal_True;

	try
	{
		if ( xLhsFlavors.getLength( ) == xRhsFlavors.getLength( ) )
		{
			OUString pLhs;
			OUString pRhs;

			for ( sal_Int32 i = 0; i < xLhsFlavors.getLength( ); i++ )
			{
				pLhs = xLhs->getParameterValue( xLhsFlavors[i] );
				pRhs = xRhs->getParameterValue( xLhsFlavors[i] );

				if ( !pLhs.equalsIgnoreAsciiCase( pRhs ) )
				{
					bRet = sal_False;
					break;
				}
			}
		}
		else
			bRet = sal_False;
	}
	catch( NoSuchElementException& )
	{
		bRet = sal_False;
	}
	catch( IllegalArgumentException& )
	{
		bRet = sal_False;
	}

	return bRet;
}

::com::sun::star::uno::Any SAL_CALL CDOTransferable::getData( const Sequence< sal_Int8>& aProcessId  )
		throw (::com::sun::star::uno::RuntimeException)
{
	Any retVal;

	sal_uInt8 * arProcCaller= (sal_uInt8*)(sal_Int8*) aProcessId.getConstArray();
	sal_uInt8 arId[16];
	rtl_getGlobalProcessId(arId);
	if( ! memcmp( arId, arProcCaller,16))
	{
		if (m_rDataObject.is())
		{
			IDataObject* pObj= m_rDataObject.get();
			pObj->AddRef();
			retVal.setValue( &pObj, getCppuType((sal_uInt32*)0));
		}
	}
	return retVal;
}