chart2/source/controller/main/ChartDropTargetHelper.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "ChartDropTargetHelper.hxx"
  21 #include <DiagramHelper.hxx>
  22 #include <DataSourceHelper.hxx>
  23
  24 #include <com/sun/star/chart2/XChartDocument.hpp>
  25 #include <com/sun/star/chart2/data/XDataProvider.hpp>
  26 #include <com/sun/star/container/XChild.hpp>
  27
  28 #include <sot/formats.hxx>
  29 #include <vector>
  30
  31 using namespace ::com::sun::star;
  32
  33 using ::com::sun::star::uno::Reference;
  34 using ::com::sun::star::uno::Sequence;
  35
  36 namespace
  37 {
  38
  39 std::vector< OUString > lcl_getStringsFromByteSequence(
  40     const Sequence< sal_Int8 > & aByteSequence )
  41 {
  42     std::vector< OUString > aResult;
  43     const sal_Int32 nLength = aByteSequence.getLength();
  44     const sal_Char * pBytes( reinterpret_cast< const sal_Char* >( aByteSequence.getConstArray()));
  45     sal_Int32 nStartPos = 0;
  46     for( sal_Int32 nPos=0; nPos<nLength; ++nPos )
  47     {
  48         if( pBytes[nPos] == '\0' )
  49         {
  50             aResult.emplace_back( pBytes + nStartPos, (nPos - nStartPos), RTL_TEXTENCODING_ASCII_US );
  51             nStartPos = nPos + 1;
  52         }
  53     }
  54     return aResult;
  55 }
  56
  57 } // anonymous namespace
  58
  59 namespace chart
  60 {
  61
  62 ChartDropTargetHelper::ChartDropTargetHelper(
  63     const Reference< datatransfer::dnd::XDropTarget >& rxDropTarget,
  64     const Reference< chart2::XChartDocument > & xChartDocument ) :
  65         DropTargetHelper( rxDropTarget ),
  66         m_xChartDocument( xChartDocument )
  67 {}
  68
  69 ChartDropTargetHelper::~ChartDropTargetHelper()
  70 {}
  71
  72 bool ChartDropTargetHelper::satisfiesPrerequisites() const
  73 {
  74     return  ( m_xChartDocument.is() &&
  75               ! m_xChartDocument->hasInternalDataProvider());
  76 }
  77
  78 sal_Int8 ChartDropTargetHelper::AcceptDrop( const AcceptDropEvent& rEvt )
  79 {
  80     sal_Int8 nResult = DND_ACTION_NONE;
  81
  82     if( ( rEvt.mnAction == DND_ACTION_COPY ||
  83           rEvt.mnAction == DND_ACTION_MOVE ) &&
  84         satisfiesPrerequisites() &&
  85         IsDropFormatSupported( SotClipboardFormatId::LINK ) )
  86     {
  87         // @todo: check if the data is suitable. Is this possible without XTransferable?
  88         nResult = rEvt.mnAction;
  89     }
  90
  91     return nResult;
  92 }
  93
  94 sal_Int8 ChartDropTargetHelper::ExecuteDrop( const ExecuteDropEvent& rEvt )
  95 {
  96     sal_Int8 nResult = DND_ACTION_NONE;
  97
  98     if( ( rEvt.mnAction == DND_ACTION_COPY ||
  99           rEvt.mnAction == DND_ACTION_MOVE ) &&
 100         rEvt.maDropEvent.Transferable.is() &&
 101         satisfiesPrerequisites())
 102     {
 103         TransferableDataHelper aDataHelper( rEvt.maDropEvent.Transferable );
 104         if( aDataHelper.HasFormat( SotClipboardFormatId::LINK ))
 105         {
 106             Sequence<sal_Int8> aBytes = aDataHelper.GetSequence(SotClipboardFormatId::LINK, OUString());
 107             if (aBytes.getLength())
 108             {
 109                 std::vector< OUString > aStrings( lcl_getStringsFromByteSequence( aBytes ));
 110                 if( aStrings.size() >= 3 && aStrings[0] == "soffice" )
 111                 {
 112                     OUString aRangeString( aStrings[2] );
 113                     Reference< container::XChild > xChild( m_xChartDocument, uno::UNO_QUERY );
 114                     if( xChild.is())
 115                     {
 116                         Reference< frame::XModel > xParentModel( xChild->getParent(), uno::UNO_QUERY );
 117                         if( xParentModel.is() &&
 118                             m_xChartDocument.is())
 119                         {
 120                             // @todo: get the title somehow and compare it to
 121                             // aDocName if successful (the document is the
 122                             // parent)
 123                             Reference< chart2::XDiagram > xDiagram( m_xChartDocument->getFirstDiagram() );
 124                             Reference< chart2::data::XDataProvider > xDataProvider( m_xChartDocument->getDataProvider());
 125                             if( xDataProvider.is() && xDiagram.is() &&
 126                                 DataSourceHelper::allArgumentsForRectRangeDetected( m_xChartDocument ))
 127                             {
 128                                 Reference< chart2::data::XDataSource > xDataSource(
 129                                     DataSourceHelper::pressUsedDataIntoRectangularFormat( m_xChartDocument ));
 130                                 Sequence< beans::PropertyValue > aArguments(
 131                                     xDataProvider->detectArguments( xDataSource ));
 132
 133                                 OUString aOldRange;
 134                                 beans::PropertyValue * pCellRange = nullptr;
 135                                 for( sal_Int32 i=0; i<aArguments.getLength(); ++i )
 136                                 {
 137                                     if ( aArguments[i].Name == "CellRangeRepresentation" )
 138                                     {
 139                                         pCellRange = (aArguments.getArray() + i);
 140                                         aArguments[i].Value >>= aOldRange;
 141                                         break;
 142                                     }
 143                                 }
 144                                 if( pCellRange )
 145                                 {
 146                                     // copy means add ranges, move means replace
 147                                     if( rEvt.mnAction == DND_ACTION_COPY )
 148                                     {
 149                                         // @todo: using implicit knowledge that ranges can be
 150                                         // merged with ";". This should be done more general
 151                                         pCellRange->Value <<= (aOldRange + ";" + aRangeString );
 152                                     }
 153                                     // move means replace range
 154                                     else
 155                                     {
 156                                         pCellRange->Value <<= aRangeString;
 157                                     }
 158
 159                                     xDataSource.set( xDataProvider->createDataSource( aArguments ));
 160                                     xDiagram->setDiagramData( xDataSource, aArguments );
 161
 162                                     // always return copy state to avoid deletion of the dragged range
 163                                     nResult = DND_ACTION_COPY;
 164                                 }
 165                             }
 166                         }
 167                     }
 168                 }
 169             }
 170         }
 171     }
 172     return nResult;
 173 }
 174
 175 } //  namespace chart
 176
 177 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */