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