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 <DataSourceHelper.hxx>
  22
  23 #include <com/sun/star/chart2/XChartDocument.hpp>
  24 #include <com/sun/star/chart2/data/XDataProvider.hpp>
  25 #include <com/sun/star/container/XChild.hpp>
  26
  27 #include <sot/formats.hxx>
  28 #include <vector>
  29
  30 using namespace ::com::sun::star;
  31
  32 using ::com::sun::star::uno::Reference;
  33 using ::com::sun::star::uno::Sequence;
  34
  35 namespace
  36 {
  37
  38 std::vector< OUString > lcl_getStringsFromByteSequence(
  39     const Sequence< sal_Int8 > & aByteSequence )
  40 {
  41     std::vector< OUString > aResult;
  42     const sal_Int32 nLength = aByteSequence.getLength();
  43     const sal_Char * pBytes( reinterpret_cast< const sal_Char* >( aByteSequence.getConstArray()));
  44     sal_Int32 nStartPos = 0;
  45     for( sal_Int32 nPos=0; nPos<nLength; ++nPos )
  46     {
  47         if( pBytes[nPos] == '\0' )
  48         {
  49             aResult.emplace_back( pBytes + nStartPos, (nPos - nStartPos), RTL_TEXTENCODING_ASCII_US );
  50             nStartPos = nPos + 1;
  51         }
  52     }
  53     return aResult;
  54 }
  55
  56 } // anonymous namespace
  57
  58 namespace chart
  59 {
  60
  61 ChartDropTargetHelper::ChartDropTargetHelper(
  62     const Reference< datatransfer::dnd::XDropTarget >& rxDropTarget,
  63     const Reference< chart2::XChartDocument > & xChartDocument ) :
  64         DropTargetHelper( rxDropTarget ),
  65         m_xChartDocument( xChartDocument )
  66 {}
  67
  68 ChartDropTargetHelper::~ChartDropTargetHelper()
  69 {}
  70
  71 bool ChartDropTargetHelper::satisfiesPrerequisites() const
  72 {
  73     return  ( m_xChartDocument.is() &&
  74               ! m_xChartDocument->hasInternalDataProvider());
  75 }
  76
  77 sal_Int8 ChartDropTargetHelper::AcceptDrop( const AcceptDropEvent& rEvt )
  78 {
  79     sal_Int8 nResult = DND_ACTION_NONE;
  80
  81     if( ( rEvt.mnAction == DND_ACTION_COPY ||
  82           rEvt.mnAction == DND_ACTION_MOVE ) &&
  83         satisfiesPrerequisites() &&
  84         IsDropFormatSupported( SotClipboardFormatId::LINK ) )
  85     {
  86         // @todo: check if the data is suitable. Is this possible without XTransferable?
  87         nResult = rEvt.mnAction;
  88     }
  89
  90     return nResult;
  91 }
  92
  93 sal_Int8 ChartDropTargetHelper::ExecuteDrop( const ExecuteDropEvent& rEvt )
  94 {
  95     sal_Int8 nResult = DND_ACTION_NONE;
  96
  97     if( ( rEvt.mnAction == DND_ACTION_COPY ||
  98           rEvt.mnAction == DND_ACTION_MOVE ) &&
  99         rEvt.maDropEvent.Transferable.is() &&
 100         satisfiesPrerequisites())
 101     {
 102         TransferableDataHelper aDataHelper( rEvt.maDropEvent.Transferable );
 103         if( aDataHelper.HasFormat( SotClipboardFormatId::LINK ))
 104         {
 105             Sequence<sal_Int8> aBytes = aDataHelper.GetSequence(SotClipboardFormatId::LINK, OUString());
 106             if (aBytes.hasElements())
 107             {
 108                 std::vector< OUString > aStrings( lcl_getStringsFromByteSequence( aBytes ));
 109                 if( aStrings.size() >= 3 && aStrings[0] == "soffice" )
 110                 {
 111                     OUString aRangeString( aStrings[2] );
 112                     Reference< container::XChild > xChild( m_xChartDocument, uno::UNO_QUERY );
 113                     if( xChild.is())
 114                     {
 115                         Reference< frame::XModel > xParentModel( xChild->getParent(), uno::UNO_QUERY );
 116                         if( xParentModel.is() &&
 117                             m_xChartDocument.is())
 118                         {
 119                             // @todo: get the title somehow and compare it to
 120                             // aDocName if successful (the document is the
 121                             // parent)
 122                             Reference< chart2::XDiagram > xDiagram( m_xChartDocument->getFirstDiagram() );
 123                             Reference< chart2::data::XDataProvider > xDataProvider( m_xChartDocument->getDataProvider());
 124                             if( xDataProvider.is() && xDiagram.is() &&
 125                                 DataSourceHelper::allArgumentsForRectRangeDetected( m_xChartDocument ))
 126                             {
 127                                 Reference< chart2::data::XDataSource > xDataSource(
 128                                     DataSourceHelper::pressUsedDataIntoRectangularFormat( m_xChartDocument ));
 129                                 Sequence< beans::PropertyValue > aArguments(
 130                                     xDataProvider->detectArguments( xDataSource ));
 131
 132                                 OUString aOldRange;
 133                                 beans::PropertyValue * pCellRange = nullptr;
 134                                 for( sal_Int32 i=0; i<aArguments.getLength(); ++i )
 135                                 {
 136                                     if ( aArguments[i].Name == "CellRangeRepresentation" )
 137                                     {
 138                                         pCellRange = (aArguments.getArray() + i);
 139                                         aArguments[i].Value >>= aOldRange;
 140                                         break;
 141                                     }
 142                                 }
 143                                 if( pCellRange )
 144                                 {
 145                                     // copy means add ranges, move means replace
 146                                     if( rEvt.mnAction == DND_ACTION_COPY )
 147                                     {
 148                                         // @todo: using implicit knowledge that ranges can be
 149                                         // merged with ";". This should be done more general
 150                                         pCellRange->Value <<= aOldRange + ";" + aRangeString;
 151                                     }
 152                                     // move means replace range
 153                                     else
 154                                     {
 155                                         pCellRange->Value <<= aRangeString;
 156                                     }
 157
 158                                     xDataSource.set( xDataProvider->createDataSource( aArguments ));
 159                                     xDiagram->setDiagramData( xDataSource, aArguments );
 160
 161                                     // always return copy state to avoid deletion of the dragged range
 162                                     nResult = DND_ACTION_COPY;
 163                                 }
 164                             }
 165                         }
 166                     }
 167                 }
 168             }
 169         }
 170     }
 171     return nResult;
 172 }
 173
 174 } //  namespace chart
 175
 176 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */