1 files changed, 205 insertions, 0 deletions
diff --git a/vcl/win/dtrans/DTransHelper.cxx b/vcl/win/dtrans/DTransHelper.cxx
new file mode 100644
index 0000000000..66d18f9fb5
--- /dev/null
+++ b/vcl/win/dtrans/DTransHelper.cxx
@@ -0,0 +1,205 @@
+/* -*- 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 <rtl/ustring.h>
+#include <osl/diagnose.h>
+#include "DTransHelper.hxx"
+
+// implementation
+
+CStgTransferHelper::CStgTransferHelper( bool bAutoInit,
+                                        HGLOBAL hGlob,
+                                        bool bDelStgOnRelease ) :
+    m_lpStream( nullptr ),
+    m_bDelStgOnRelease( bDelStgOnRelease )
+{
+    if ( bAutoInit )
+        init( hGlob, m_bDelStgOnRelease );
+}
+
+// dtor
+
+CStgTransferHelper::~CStgTransferHelper( )
+{
+    if ( m_lpStream )
+        m_lpStream->Release( );
+}
+
+// TransferData into the
+
+void CStgTransferHelper::write( const void* lpData, ULONG cb, ULONG* cbWritten )
+{
+    HRESULT hr = E_FAIL;
+
+    if ( m_lpStream )
+        hr = m_lpStream->Write( lpData, cb, cbWritten );
+
+    if ( FAILED( hr ) )
+        throw CStgTransferException( hr );
+
+#if OSL_DEBUG_LEVEL > 0
+    HGLOBAL hGlob;
+    hr = GetHGlobalFromStream( m_lpStream, &hGlob );
+    OSL_ASSERT( SUCCEEDED( hr ) );
+
+    /*DWORD dwSize =*/ GlobalSize( hGlob );
+    /*LPVOID lpdbgData =*/ GlobalLock( hGlob );
+    GlobalUnlock( hGlob );
+#endif
+}
+
+// read
+
+void CStgTransferHelper::read( LPVOID pv, ULONG cb, ULONG* pcbRead )
+{
+    HRESULT hr = E_FAIL;
+
+    if ( m_lpStream )
+        hr = m_lpStream->Read( pv, cb , pcbRead );
+
+    if ( FAILED( hr ) )
+        throw CStgTransferException( hr );
+}
+
+// GetHGlobal
+
+HGLOBAL CStgTransferHelper::getHGlobal( ) const
+{
+    OSL_ASSERT( m_lpStream );
+
+    HGLOBAL hGlob = nullptr;
+
+    if ( m_lpStream )
+    {
+        HRESULT hr = GetHGlobalFromStream( m_lpStream, &hGlob );
+        if ( FAILED( hr ) )
+            hGlob = nullptr;
+    }
+
+    return hGlob;
+}
+
+// getIStream
+
+void CStgTransferHelper::getIStream( LPSTREAM* ppStream )
+{
+    OSL_ASSERT( ppStream );
+    *ppStream = m_lpStream;
+    if ( *ppStream )
+        static_cast< LPUNKNOWN >( *ppStream )->AddRef( );
+}
+
+// Init
+
+void CStgTransferHelper::init( SIZE_T newSize,
+                                        sal_uInt32 uiFlags,
+                                        bool bDelStgOnRelease )
+{
+    cleanup( );
+
+    m_bDelStgOnRelease      = bDelStgOnRelease;
+
+    HGLOBAL hGlob = GlobalAlloc( uiFlags, newSize );
+    if ( nullptr == hGlob )
+        throw CStgTransferException( STG_E_MEDIUMFULL );
+
+    HRESULT hr = CreateStreamOnHGlobal( hGlob, m_bDelStgOnRelease, &m_lpStream );
+    if ( FAILED( hr ) )
+    {
+        GlobalFree( hGlob );
+        m_lpStream = nullptr;
+        throw CStgTransferException( hr );
+    }
+
+#if OSL_DEBUG_LEVEL > 0
+    STATSTG statstg;
+    hr = m_lpStream->Stat( &statstg, STATFLAG_DEFAULT );
+    OSL_ASSERT( SUCCEEDED( hr ) );
+#endif
+}
+
+// Init
+
+void CStgTransferHelper::init( HGLOBAL hGlob,
+                                        bool bDelStgOnRelease )
+{
+    cleanup( );
+
+    m_bDelStgOnRelease      = bDelStgOnRelease;
+
+    HRESULT hr = CreateStreamOnHGlobal( hGlob, m_bDelStgOnRelease, &m_lpStream );
+    if ( FAILED( hr ) )
+        throw CStgTransferException( hr );
+}
+
+// free the global memory and invalidate the stream pointer
+
+void CStgTransferHelper::cleanup( )
+{
+    if ( m_lpStream && !m_bDelStgOnRelease )
+    {
+        HGLOBAL hGlob;
+        GetHGlobalFromStream( m_lpStream, &hGlob );
+        GlobalFree( hGlob );
+    }
+
+    if ( m_lpStream )
+    {
+        m_lpStream->Release( );
+        m_lpStream = nullptr;
+    }
+}
+
+// return the size of memory we point to
+
+sal_uInt32 CStgTransferHelper::memSize( CLIPFORMAT cf ) const
+{
+    DWORD dwSize = 0;
+
+    if ( nullptr != m_lpStream )
+    {
+        HGLOBAL hGlob;
+        GetHGlobalFromStream( m_lpStream, &hGlob );
+
+        if ( CF_TEXT == cf || RegisterClipboardFormatW( L"HTML Format" ) == cf )
+        {
+            char* pText = static_cast< char* >( GlobalLock( hGlob ) );
+            if ( pText )
+            {
+                dwSize = strlen(pText) + 1; // strlen + trailing '\0'
+                GlobalUnlock( hGlob );
+            }
+        }
+        else if ( CF_UNICODETEXT == cf )
+        {
+            sal_Unicode* pText = static_cast< sal_Unicode* >( GlobalLock( hGlob ) );
+            if ( pText )
+            {
+                dwSize = rtl_ustr_getLength( pText ) * sizeof( sal_Unicode );
+                GlobalUnlock( hGlob );
+            }
+        }
+        else
+            dwSize = GlobalSize( hGlob );
+    }
+
+    return dwSize;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */