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