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 _T("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     if (m_data != NULL)
  65     {
  66         delete m_data;
  67         m_data = NULL;
  68     }
  69
  70     OSStatus err = PasteboardClear( m_pasteboard );
  71     if (err != noErr)
  72     {
  73         wxLogSysError( wxT("Failed to empty the clipboard.") );
  74     }
  75 }
  76
  77 bool wxClipboard::Flush()
  78 {
  79     return false;
  80 }
  81
  82 bool wxClipboard::Open()
  83 {
  84     wxCHECK_MSG( !m_open, false, wxT("clipboard already open") );
  85
  86     m_open = true;
  87
  88     return true;
  89 }
  90
  91 bool wxClipboard::IsOpened() const
  92 {
  93     return m_open;
  94 }
  95
  96 bool wxClipboard::SetData( wxDataObject *data )
  97 {
  98     if ( IsUsingPrimarySelection() )
  99         return false;
 100
 101     wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
 102     wxCHECK_MSG( data, false, wxT("data is invalid") );
 103
 104     Clear();
 105
 106     // as we can only store one wxDataObject,
 107     // this is the same in this implementation
 108     return AddData( data );
 109 }
 110
 111 bool wxClipboard::AddData( wxDataObject *data )
 112 {
 113     if ( IsUsingPrimarySelection() )
 114         return false;
 115
 116     wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
 117     wxCHECK_MSG( data, false, wxT("data is invalid") );
 118
 119     // we can only store one wxDataObject
 120     Clear();
 121
 122     PasteboardSyncFlags syncFlags = PasteboardSynchronize( m_pasteboard );
 123     wxCHECK_MSG( !(syncFlags&kPasteboardModified), false, wxT("clipboard modified after clear") );
 124     wxCHECK_MSG( (syncFlags&kPasteboardClientIsOwner), false, wxT("client couldn't own clipboard") );
 125
 126     m_data = data;
 127
 128     data->AddToPasteboard( m_pasteboard, 1 );
 129
 130     return true;
 131 }
 132
 133 void wxClipboard::Close()
 134 {
 135     wxCHECK_RET( m_open, wxT("clipboard not open") );
 136
 137     m_open = false;
 138
 139     // Get rid of cached object.
 140     // If this is not done, copying data from
 141     // another application will only work once
 142     if (m_data)
 143     {
 144         delete m_data;
 145         m_data = (wxDataObject*) NULL;
 146     }
 147 }
 148
 149 bool wxClipboard::IsSupported( const wxDataFormat &dataFormat )
 150 {
 151     wxLogTrace(TRACE_CLIPBOARD, wxT("Checking if format %s is available"),
 152                dataFormat.GetId().c_str());
 153
 154     if ( m_data )
 155         return m_data->IsSupported( dataFormat );
 156     return wxDataObject::IsFormatInPasteboard( m_pasteboard, dataFormat );
 157 }
 158
 159 bool wxClipboard::GetData( wxDataObject& data )
 160 {
 161     if ( IsUsingPrimarySelection() )
 162         return false;
 163
 164     wxCHECK_MSG( m_open, false, wxT("clipboard not open") );
 165
 166     size_t formatcount = data.GetFormatCount() + 1;
 167     wxDataFormat *array = new wxDataFormat[ formatcount ];
 168     array[0] = data.GetPreferredFormat();
 169     data.GetAllFormats( &array[1] );
 170
 171     bool transferred = false;
 172
 173     if ( m_data )
 174     {
 175         for (size_t i = 0; !transferred && i < formatcount; i++)
 176         {
 177             wxDataFormat format = array[ i ];
 178             if ( m_data->IsSupported( format ) )
 179             {
 180                 int dataSize = m_data->GetDataSize( format );
 181                 transferred = true;
 182
 183                 if (dataSize == 0)
 184                 {
 185                     data.SetData( format, 0, 0 );
 186                 }
 187                 else
 188                 {
 189                     char *d = new char[ dataSize ];
 190                     m_data->GetDataHere( format, (void*)d );
 191                     data.SetData( format, dataSize, d );
 192                     delete [] d;
 193                 }
 194             }
 195         }
 196     }
 197
 198     // get formats from wxDataObjects
 199     if ( !transferred )
 200     {
 201         transferred = data.GetFromPasteboard( m_pasteboard ) ;
 202     }
 203
 204     delete [] array;
 205
 206     return transferred;
 207 }
 208
 209 #endif