Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 577 insertions, 0 deletions

diff --git a/vcl/win/dtrans/DOTransferable.cxx b/vcl/win/dtrans/DOTransferable.cxx
new file mode 100644
index 000000000..7c5b55c02
--- /dev/null
+++ b/vcl/win/dtrans/DOTransferable.cxx
@@ -0,0 +1,577 @@
+/* -*- 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 <sal/types.h>
+#include <rtl/process.h>
+#include <osl/diagnose.h>
+#include <sal/log.hxx>
+
+#include "DOTransferable.hxx"
+#include "ImplHelper.hxx"
+#include "WinClip.hxx"
+#include "WinClipboard.hxx"
+#include "DTransHelper.hxx"
+#include "TxtCnvtHlp.hxx"
+#include "MimeAttrib.hxx"
+#include "FmtFilter.hxx"
+#include "Fetc.hxx"
+#include <com/sun/star/container/NoSuchElementException.hpp>
+#include <com/sun/star/datatransfer/MimeContentTypeFactory.hpp>
+#include <com/sun/star/datatransfer/UnsupportedFlavorException.hpp>
+#include <com/sun/star/io/IOException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+
+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  = cppu::UnoType<Sequence< sal_Int8 >>::get();
+    const Type CPPUTYPE_OUSTRING = cppu::UnoType<OUString>::get();
+
+    bool isValidFlavor( const DataFlavor& aFlavor )
+    {
+        return ( aFlavor.MimeType.getLength( ) &&
+                 ( ( aFlavor.DataType ==  CPPUTYPE_SEQINT8 ) ||
+                 ( aFlavor.DataType == CPPUTYPE_OUSTRING ) ) );
+    }
+
+void clipDataToByteStream( CLIPFORMAT cf, STGMEDIUM stgmedium, CDOTransferable::ByteSequence_t& aByteSequence )
+{
+    CStgTransferHelper memTransferHelper;
+    LPSTREAM pStream = nullptr;
+
+    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:
+        pStream = stgmedium.pstm;
+        break;
+
+    default:
+        throw UnsupportedFlavorException( );
+        break;
+    }
+
+    if (pStream)
+    {
+        // We have a stream, read from it.
+        STATSTG aStat;
+        HRESULT hr = pStream->Stat(&aStat, STATFLAG_NONAME);
+        if (FAILED(hr))
+        {
+            SAL_WARN("vcl.win.dtrans", "clipDataToByteStream: Stat() failed");
+            return;
+        }
+
+        size_t nMemSize = aStat.cbSize.QuadPart;
+        aByteSequence.realloc(nMemSize);
+        LARGE_INTEGER li;
+        li.QuadPart = 0;
+        hr = pStream->Seek(li, STREAM_SEEK_SET, nullptr);
+        if (FAILED(hr))
+        {
+            SAL_WARN("vcl.win.dtrans", "clipDataToByteStream: Seek() failed");
+        }
+
+        ULONG nRead = 0;
+        hr = pStream->Read(aByteSequence.getArray(), nMemSize, &nRead);
+        if (FAILED(hr))
+        {
+            SAL_WARN("vcl.win.dtrans", "clipDataToByteStream: Read() failed");
+        }
+        if (nRead < nMemSize)
+        {
+            SAL_WARN("vcl.win.dtrans", "clipDataToByteStream: Read() was partial");
+        }
+
+        return;
+    }
+
+    int nMemSize = memTransferHelper.memSize( cf );
+    aByteSequence.realloc( nMemSize );
+    memTransferHelper.read( aByteSequence.getArray( ), nMemSize );
+}
+
+OUString byteStreamToOUString( CDOTransferable::ByteSequence_t& aByteStream )
+{
+    sal_Int32 nWChars;
+    sal_Int32 nMemSize = aByteStream.getLength( );
+
+    // if there is a trailing L"\0" subtract 1 from length
+    // for unknown reason, the sequence may sometimes arrive empty
+    if ( aByteStream.getLength( ) > 1 &&
+         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 );
+}
+
+Any byteStreamToAny( CDOTransferable::ByteSequence_t& aByteStream, const Type& aRequestedDataType )
+{
+    Any aAny;
+
+    if ( aRequestedDataType == CPPUTYPE_OUSTRING )
+    {
+        OUString str = byteStreamToOUString( aByteStream );
+        if (str.isEmpty())
+            throw RuntimeException();
+        aAny <<= str;
+    }
+    else
+        aAny <<= aByteStream;
+
+    return aAny;
+}
+
+bool cmpFullMediaType(
+    const Reference< XMimeContentType >& xLhs, const Reference< XMimeContentType >& xRhs )
+{
+    return xLhs->getFullMediaType().equalsIgnoreAsciiCase( xRhs->getFullMediaType( ) );
+}
+
+bool cmpAllContentTypeParameter(
+    const Reference< XMimeContentType >& xLhs, const Reference< XMimeContentType >& xRhs )
+{
+    Sequence< OUString > xLhsFlavors = xLhs->getParameters( );
+    Sequence< OUString > xRhsFlavors = xRhs->getParameters( );
+    bool bRet = 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 = false;
+                    break;
+                }
+            }
+        }
+        else
+            bRet = false;
+    }
+    catch( NoSuchElementException& )
+    {
+        bRet = false;
+    }
+    catch( IllegalArgumentException& )
+    {
+        bRet = false;
+    }
+
+    return bRet;
+}
+
+} // end namespace
+
+CDOTransferable::CDOTransferable(
+    const Reference< XComponentContext >& rxContext, IDataObjectPtr rDataObject ) :
+    m_rDataObject( rDataObject ),
+    m_xContext( rxContext ),
+    m_DataFormatTranslator( rxContext ),
+    m_bUnicodeRegistered( false ),
+    m_TxtFormatOnClipboard( CF_INVALID )
+{
+    initFlavorList();
+}
+
+CDOTransferable::CDOTransferable(
+    const Reference<XComponentContext>& rxContext,
+    const css::uno::Reference<css::datatransfer::clipboard::XClipboard>& xClipboard,
+    const std::vector<sal_uInt32>& rFormats)
+    : m_xClipboard(xClipboard)
+    , m_xContext(rxContext)
+    , m_DataFormatTranslator(rxContext)
+    , m_bUnicodeRegistered(false)
+    , m_TxtFormatOnClipboard(CF_INVALID)
+{
+    initFlavorListFromFormatList(rFormats);
+}
+
+Any SAL_CALL CDOTransferable::getTransferData( const DataFlavor& aFlavor )
+{
+    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 ( CDataFormatTranslator::isUnicodeTextFormat( fetc.getClipformat( ) ) &&
+             m_bUnicodeRegistered )
+        {
+             OUString aUnicodeText = synthesizeUnicodeText( );
+             Any aAny( aUnicodeText );
+             return aAny;
+        }
+        // #i124085# 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())
+        {
+            // #i123407# CF_DIBV5 has priority; if the try to fetch this failed,
+            // check CF_DIB availability as an alternative
+            fetc.setClipformat(CF_DIB);
+
+            clipDataStream = getClipboardData( fetc );
+                // pass UnsupportedFlavorException out, 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(  )
+{
+    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 )
+{
+    OSL_ASSERT( isValidFlavor( aFlavor ) );
+
+    for ( DataFlavor const & df : std::as_const(m_FlavorList) )
+        if ( compareDataFlavors( aFlavor, df ) )
+            return true;
+
+    return false;
+}
+
+// the list of dataflavors currently on the clipboard will be initialized
+// only once; if the client of this Transferable will hold a reference
+// to it and the underlying clipboard content changes, the client does
+// possible operate on an 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 CDOTransferable::initFlavorList( )
+{
+    std::vector<sal_uInt32> aFormats;
+    sal::systools::COMReference<IEnumFORMATETC> pEnumFormatEtc;
+    HRESULT hr = m_rDataObject->EnumFormatEtc( DATADIR_GET, &pEnumFormatEtc );
+    if ( SUCCEEDED( hr ) )
+    {
+        pEnumFormatEtc->Reset( );
+
+        FORMATETC fetc;
+        while ( S_OK == pEnumFormatEtc->Next( 1, &fetc, nullptr ) )
+        {
+            aFormats.push_back(fetc.cfFormat);
+            // see MSDN IEnumFORMATETC
+            CoTaskMemFree( fetc.ptd );
+        }
+        initFlavorListFromFormatList(aFormats);
+    }
+}
+
+void CDOTransferable::initFlavorListFromFormatList(const std::vector<sal_uInt32>& rFormats)
+{
+    for (sal_uInt32 cfFormat : rFormats)
+    {
+        // we use locales only to determine the
+        // charset if there is text on the clipboard
+        // we don't offer this format
+        if (CF_LOCALE == cfFormat)
+            continue;
+
+        // if text or oemtext is offered we pretend to have unicode text
+        if (CDataFormatTranslator::isTextFormat(cfFormat))
+        {
+            if (!m_bUnicodeRegistered)
+            {
+                m_TxtFormatOnClipboard = cfFormat;
+                m_bUnicodeRegistered   = true;
+
+                // register unicode text as format
+                addSupportedFlavor(formatEtcToDataFlavor(CF_UNICODETEXT));
+            }
+        }
+        else
+            addSupportedFlavor(formatEtcToDataFlavor(cfFormat));
+    }
+}
+
+inline
+void 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.getArray()[m_FlavorList.getLength( ) - 1] = aFlavor;
+    }
+}
+
+DataFlavor CDOTransferable::formatEtcToDataFlavor(sal_uInt32 cfFormat)
+{
+    return m_DataFormatTranslator.getDataFlavorFromFormatEtc(cfFormat);
+}
+
+// returns the current locale on clipboard; if there is no locale on
+// clipboard the function returns the current thread locale
+
+LCID CDOTransferable::getLocaleFromClipboard( )
+{
+    LCID lcid = GetThreadLocale( );
+
+    try
+    {
+        CFormatEtc fetc = CDataFormatTranslator::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;
+}
+
+void CDOTransferable::tryToGetIDataObjectIfAbsent()
+{
+    if (!m_rDataObject.is())
+    {
+        auto xClipboard = m_xClipboard.get(); // holding the reference while we get the object
+        if (CWinClipboard* pWinClipboard = dynamic_cast<CWinClipboard*>(xClipboard.get()))
+        {
+            m_rDataObject = pWinClipboard->getIDataObject();
+        }
+    }
+}
+
+// I think it's not necessary to call ReleaseStgMedium
+// in case of failures because nothing should have been
+// allocated etc.
+
+CDOTransferable::ByteSequence_t CDOTransferable::getClipboardData( CFormatEtc& aFormatEtc )
+{
+    STGMEDIUM stgmedium;
+    tryToGetIDataObjectIfAbsent();
+    if (!m_rDataObject.is()) // Maybe we are shutting down, and clipboard is already destroyed?
+        throw RuntimeException();
+    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) && aFormatEtc.getTymed() == TYMED_HGLOBAL)
+    {
+        // Handle type is not memory, try stream.
+        CFormatEtc aTempFormat(aFormatEtc);
+        aTempFormat.setTymed(TYMED_ISTREAM);
+        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
+            // #i124085# 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 CDOTransferable::synthesizeUnicodeText( )
+{
+    ByteSequence_t aTextSequence;
+    CFormatEtc     fetc;
+    LCID           lcid = getLocaleFromClipboard( );
+    sal_uInt32     cpForTxtCnvt = 0;
+
+    if ( CF_TEXT == m_TxtFormatOnClipboard )
+    {
+        fetc = CDataFormatTranslator::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 = CDataFormatTranslator::getFormatEtcForClipformat( CF_OEMTEXT );
+        aTextSequence = getClipboardData( fetc );
+
+        // determine the codepage used for text conversion
+        cpForTxtCnvt = getWinCPFromLocaleId( lcid, LOCALE_IDEFAULTCODEPAGE ).toInt32( );
+    }
+    else
+        OSL_ASSERT( false );
+
+    CStgTransferHelper stgTransferHelper;
+
+    // convert the text
+    MultiByteToWideCharEx( cpForTxtCnvt,
+                           reinterpret_cast<char*>( aTextSequence.getArray( ) ),
+                           -1,
+                           stgTransferHelper,
+                           false);
+
+    CRawHGlobalPtr  ptrHGlob(stgTransferHelper);
+    sal_Unicode*    pWChar = static_cast<sal_Unicode*>(ptrHGlob.GetMemPtr());
+
+    return OUString(pWChar);
+}
+
+bool CDOTransferable::compareDataFlavors(
+    const DataFlavor& lhs, const DataFlavor& rhs )
+{
+    if ( !m_rXMimeCntFactory.is( ) )
+    {
+        m_rXMimeCntFactory = MimeContentTypeFactory::create( m_xContext );
+    }
+
+    bool bRet = 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_FAIL( "Invalid content type detected" );
+        bRet = false;
+    }
+
+    return bRet;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */