src/osx/carbon/clipbrd.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/clipbrd.cpp
   3 // Purpose:     Clipboard functionality
   4 // Author:      Stefan Csomor;
   5 //              Generalized clipboard implementation by Matthew Flatt
   6 // Modified by:
   7 // Created:     1998-01-01
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) Stefan Csomor
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_CLIPBOARD
  16
  17 #include "wx/clipbrd.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/intl.h"
  21     #include "wx/log.h"
  22     #include "wx/app.h"
  23     #include "wx/utils.h"
  24     #include "wx/frame.h"
  25     #include "wx/bitmap.h"
  26 #endif
  27
  28 #include "wx/metafile.h"
  29
  30 #include "wx/osx/private.h"
  31
  32 #define wxUSE_DATAOBJ 1
  33
  34 #include <string.h>
  35
  36 // the trace mask we use with wxLogTrace() - call
  37 // wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here
  38 // (there will be a *lot* of them!)
  39 #define TRACE_CLIPBOARD wxT("clipboard")
  40
  41 IMPLEMENT_DYNAMIC_CLASS(wxClipboard, wxObject)
  42
  43 wxClipboard::wxClipboard()
  44 {
  45     m_open = false;
  46     m_data = NULL ;
  47     PasteboardRef clipboard = 0;
  48     OSStatus err = PasteboardCreate( kPasteboardClipboard, &clipboard );
  49     if (err != noErr)
  50     {
  51         wxLogSysError( wxT("Failed to create the clipboard.") );
  52     }
  53     m_pasteboard.reset(clipboard);
  54 }
  55
  56 wxClipboard::~wxClipboard()
  57 {
  58     m_pasteboard.reset((PasteboardRef)0);
  59     delete m_data;
  60 }
  61
  62 void wxClipboard::Clear()
  63 {
  64     wxDELETE(m_data);
  65
  66     wxCHECK_RET( m_pasteboard, "Clipboard creation failed." );
  67
  68     OSStatus err = PasteboardClear( m_pasteboard );
  69     if (err != noErr)
  70     {
  71         wxLogSysError( wxT("Failed to empty the clipboard.") );
  72     }
  73 }
  74
  75 bool wxClipboard::Flush()
  76 {
  77     return false;
  78 }
  79
  80 bool wxClipboard::Open()
  81 {
  82     wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
  83
  84     m_open = true;
  85
  86     return true;
  87 }
  88
  89 bool wxClipboard::IsOpened() const
  90 {
  91     return m_open;
  92 }
  93
  94 bool wxClipboard::SetData( wxDataObject *data )
  95 {
  96     if ( IsUsingPrimarySelection() )
  97         return false;
  98
  99     wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
 100     wxCHECK_MSG( data, false, wxT("data is invalid") );
 101
 102     Clear();
 103
 104     // as we can only store one wxDataObject,
 105     // this is the same in this implementation
 106     return AddData( data );
 107 }
 108
 109 bool wxClipboard::AddData( wxDataObject *data )
 110 {
 111     if ( IsUsingPrimarySelection() )
 112         return false;
 113
 114     wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
 115     wxCHECK_MSG( data, false, wxT("data is invalid") );
 116
 117     // we can only store one wxDataObject
 118     Clear();
 119
 120     PasteboardSyncFlags syncFlags = PasteboardSynchronize( m_pasteboard );
 121     wxCHECK_MSG( !(syncFlags&kPasteboardModified), false, wxT("clipboard modified after clear") );
 122     wxCHECK_MSG( (syncFlags&kPasteboardClientIsOwner), false, wxT("client couldn't own clipboard") );
 123
 124     m_data = data;
 125
 126     data->AddToPasteboard( m_pasteboard, 1 );
 127
 128     return true;
 129 }
 130
 131 void wxClipboard::Close()
 132 {
 133     wxCHECK_RET( m_open, wxT("clipboard not open") );
 134
 135     m_open = false;
 136
 137     // Get rid of cached object.
 138     // If this is not done, copying data from
 139     // another application will only work once
 140     wxDELETE(m_data);
 141 }
 142
 143 bool wxClipboard::IsSupported( const wxDataFormat &dataFormat )
 144 {
 145     wxLogTrace(TRACE_CLIPBOARD, wxT("Checking if format %s is available"),
 146                dataFormat.GetId().c_str());
 147
 148     if ( m_data )
 149         return m_data->IsSupported( dataFormat );
 150     return wxDataObject::IsFormatInPasteboard( m_pasteboard, dataFormat );
 151 }
 152
 153 bool wxClipboard::GetData( wxDataObject& data )
 154 {
 155     if ( IsUsingPrimarySelection() )
 156         return false;
 157
 158     wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
 159
 160     size_t formatcount = data.GetFormatCount() + 1;
 161     wxDataFormat *array = new wxDataFormat[ formatcount ];
 162     array[0] = data.GetPreferredFormat();
 163     data.GetAllFormats( &array[1] );
 164
 165     bool transferred = false;
 166
 167     if ( m_data )
 168     {
 169         for (size_t i = 0; !transferred && i < formatcount; i++)
 170         {
 171             wxDataFormat format = array[ i ];
 172             if ( m_data->IsSupported( format ) )
 173             {
 174                 int dataSize = m_data->GetDataSize( format );
 175                 transferred = true;
 176
 177                 if (dataSize == 0)
 178                 {
 179                     data.SetData( format, 0, 0 );
 180                 }
 181                 else
 182                 {
 183                     char *d = new char[ dataSize ];
 184                     m_data->GetDataHere( format, (void*)d );
 185                     data.SetData( format, dataSize, d );
 186                     delete [] d;
 187                 }
 188             }
 189         }
 190     }
 191
 192     // get formats from wxDataObjects
 193     if ( !transferred )
 194     {
 195         transferred = data.GetFromPasteboard( m_pasteboard ) ;
 196     }
 197
 198     delete [] array;
 199
 200     return transferred;
 201 }
 202
 203 #endif