src/mac/carbon/dataobj.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/dataobj.cpp
   3 // Purpose:     implementation of wxDataObject class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     10/21/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_DATAOBJ
  16
  17 #include "wx/dataobj.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/intl.h"
  21     #include "wx/log.h"
  22     #include "wx/dcmemory.h"
  23     #include "wx/image.h"
  24 #endif
  25
  26 #include "wx/mstream.h"
  27 #include "wx/metafile.h"
  28 #include "wx/tokenzr.h"
  29
  30 #include "wx/mac/private.h"
  31
  32 #ifndef __DARWIN__
  33 #include <Scrap.h>
  34 #endif
  35
  36
  37 // ----------------------------------------------------------------------------
  38 // wxDataFormat
  39 // ----------------------------------------------------------------------------
  40
  41 wxDataFormat::wxDataFormat()
  42 {
  43     m_type = wxDF_INVALID;
  44     m_format = 0;
  45 }
  46
  47 wxDataFormat::wxDataFormat( wxDataFormatId vType )
  48 {
  49     SetType( vType );
  50 }
  51
  52 wxDataFormat::wxDataFormat( const wxChar *zId )
  53 {
  54     SetId( zId );
  55 }
  56
  57 wxDataFormat::wxDataFormat( const wxString& rId )
  58 {
  59     SetId( rId );
  60 }
  61
  62 wxDataFormat::wxDataFormat( NativeFormat vFormat )
  63 {
  64     SetId( vFormat );
  65 }
  66
  67 void wxDataFormat::SetType( wxDataFormatId dataType )
  68 {
  69     m_type = dataType;
  70
  71     switch (m_type)
  72     {
  73     case wxDF_TEXT:
  74         m_format = kScrapFlavorTypeText;
  75         break;
  76
  77     case wxDF_UNICODETEXT:
  78         m_format = kScrapFlavorTypeUnicode;
  79         break;
  80
  81     case wxDF_BITMAP:
  82     case wxDF_METAFILE:
  83         m_format = kScrapFlavorTypePicture;
  84         break;
  85
  86     case wxDF_FILENAME:
  87         m_format = kDragFlavorTypeHFS;
  88         break;
  89
  90     default:
  91        wxFAIL_MSG( wxT("invalid data format") );
  92
  93        // NB: this translates to '????' ASCII but it can't be used in the code
  94        // because '??' will get parsed as a trigraph!
  95        m_format = 0x3f3f3f3f;
  96        break;
  97     }
  98 }
  99
 100 wxString wxDataFormat::GetId() const
 101 {
 102     wxCHECK_MSG( !IsStandard(), wxEmptyString,
 103                  wxT("name of predefined format cannot be retrieved") );
 104
 105     return m_id;
 106 }
 107
 108 void wxDataFormat::SetId( NativeFormat format )
 109 {
 110     m_format = format;
 111
 112     switch (m_format)
 113     {
 114     case kScrapFlavorTypeText:
 115         m_type = wxDF_TEXT;
 116         break;
 117
 118     case kScrapFlavorTypeUnicode:
 119         m_type = wxDF_UNICODETEXT;
 120         break;
 121
 122     case kScrapFlavorTypePicture:
 123         m_type = wxDF_BITMAP;
 124         break;
 125
 126     case kDragFlavorTypeHFS:
 127         m_type = wxDF_FILENAME;
 128         break;
 129
 130     default:
 131         m_type = wxDF_PRIVATE;
 132         char text[5];
 133         memcpy( text, (const char*)&format, 4 );
 134         text[4] = 0;
 135         m_id = wxString::FromAscii( text );
 136         break;
 137     }
 138 }
 139
 140 void wxDataFormat::SetId( const wxChar* zId )
 141 {
 142     m_type = wxDF_PRIVATE;
 143     m_id = zId;
 144     m_format = 'WXPR';
 145 }
 146
 147 bool wxDataFormat::operator==(const wxDataFormat& format) const
 148 {
 149     if (IsStandard() || format.IsStandard())
 150         return (format.m_type == m_type);
 151     else
 152         return (m_id == format.m_id);
 153 }
 154
 155 //-------------------------------------------------------------------------
 156 // wxDataObject
 157 //-------------------------------------------------------------------------
 158
 159 wxDataObject::wxDataObject()
 160 {
 161 }
 162
 163 bool wxDataObject::IsSupportedFormat( const wxDataFormat& rFormat, Direction vDir ) const
 164 {
 165     size_t nFormatCount = GetFormatCount( vDir );
 166     bool found = false;
 167
 168     if (nFormatCount == 1)
 169     {
 170         found = (rFormat == GetPreferredFormat());
 171     }
 172     else
 173     {
 174         wxDataFormat *pFormats = new wxDataFormat[nFormatCount];
 175         GetAllFormats( pFormats, vDir );
 176
 177         for (size_t n = 0; n < nFormatCount; n++)
 178         {
 179             if (pFormats[n] == rFormat)
 180             {
 181                 found = true;
 182                 break;
 183             }
 184         }
 185
 186         delete [] pFormats;
 187     }
 188
 189     return found;
 190 }
 191
 192 // ----------------------------------------------------------------------------
 193 // wxTextDataObject
 194 // ----------------------------------------------------------------------------
 195
 196 #if wxUSE_UNICODE
 197 void wxTextDataObject::GetAllFormats( wxDataFormat *formats, wxDataObjectBase::Direction dir ) const
 198 {
 199     *formats++ = wxDataFormat( wxDF_TEXT );
 200     *formats = wxDataFormat( wxDF_UNICODETEXT );
 201 }
 202 #endif
 203
 204 // ----------------------------------------------------------------------------
 205 // wxFileDataObject
 206 // ----------------------------------------------------------------------------
 207
 208 void wxFileDataObject::GetFileNames( wxCharBuffer &buf ) const
 209 {
 210     wxString filenames;
 211
 212     for (size_t i = 0; i < m_filenames.GetCount(); i++)
 213     {
 214         filenames += m_filenames[i];
 215         filenames += wxT('\n');
 216     }
 217
 218     buf = filenames.fn_str();
 219 }
 220
 221 bool wxFileDataObject::GetDataHere( void *pBuf ) const
 222 {
 223     if (pBuf == NULL)
 224         return false;
 225
 226     wxCharBuffer buf;
 227     size_t buffLength;
 228
 229     GetFileNames( buf );
 230     buffLength = strlen( buf );
 231     memcpy( pBuf, (const char*)buf, buffLength + 1 );
 232
 233     return true;
 234 }
 235
 236 size_t wxFileDataObject::GetDataSize() const
 237 {
 238     wxCharBuffer buf;
 239     size_t buffLength;
 240
 241     GetFileNames( buf );
 242     buffLength = strlen( buf );
 243
 244     return buffLength + 1;
 245 }
 246
 247 bool wxFileDataObject::SetData( size_t nSize, const void *pBuf )
 248 {
 249     wxString filenames;
 250
 251 #if wxUSE_UNICODE
 252     filenames = wxString( (const char*)pBuf, *wxConvFileName );
 253 #else
 254     filenames = wxString( wxConvFileName->cMB2WX( (const char*)pBuf ), wxConvLocal );
 255 #endif
 256
 257     m_filenames = wxStringTokenize( filenames, wxT("\n"), wxTOKEN_STRTOK );
 258
 259     return true;
 260 }
 261
 262 void wxFileDataObject::AddFile( const wxString& rFilename )
 263 {
 264     m_filenames.Add( rFilename );
 265 }
 266
 267 // ----------------------------------------------------------------------------
 268 // wxBitmapDataObject
 269 // ----------------------------------------------------------------------------
 270
 271 wxBitmapDataObject::wxBitmapDataObject()
 272 {
 273     Init();
 274 }
 275
 276 wxBitmapDataObject::wxBitmapDataObject( const wxBitmap& rBitmap )
 277 : wxBitmapDataObjectBase( rBitmap )
 278 {
 279     Init();
 280
 281     if (m_bitmap.Ok())
 282     {
 283         m_pictHandle = m_bitmap.GetBitmapData()->GetPictHandle();
 284         m_pictCreated = false;
 285     }
 286 }
 287
 288 wxBitmapDataObject::~wxBitmapDataObject()
 289 {
 290     Clear();
 291 }
 292
 293 void wxBitmapDataObject::SetBitmap( const wxBitmap& rBitmap )
 294 {
 295     Clear();
 296     wxBitmapDataObjectBase::SetBitmap( rBitmap );
 297     if (m_bitmap.Ok())
 298     {
 299         m_pictHandle = m_bitmap.GetBitmapData()->GetPictHandle();
 300         m_pictCreated = false;
 301     }
 302 }
 303
 304 void wxBitmapDataObject::Init()
 305 {
 306     m_pictHandle = NULL;
 307     m_pictCreated = false;
 308 }
 309
 310 void wxBitmapDataObject::Clear()
 311 {
 312     if (m_pictHandle != NULL)
 313     {
 314         if (m_pictCreated)
 315             KillPicture( (PicHandle)m_pictHandle );
 316         m_pictHandle = NULL;
 317     }
 318
 319     m_pictCreated = false;
 320 }
 321
 322 bool wxBitmapDataObject::GetDataHere( void *pBuf ) const
 323 {
 324     if (m_pictHandle == NULL)
 325     {
 326         wxFAIL_MSG( wxT("attempt to copy empty bitmap failed") );
 327         return false;
 328     }
 329
 330     if (pBuf == NULL)
 331         return false;
 332
 333     memcpy( pBuf, *(Handle)m_pictHandle, GetHandleSize( (Handle)m_pictHandle ) );
 334
 335     return true;
 336 }
 337
 338 size_t wxBitmapDataObject::GetDataSize() const
 339 {
 340     if (m_pictHandle != NULL)
 341         return GetHandleSize( (Handle)m_pictHandle );
 342     else
 343         return 0;
 344 }
 345
 346 bool wxBitmapDataObject::SetData( size_t nSize, const void *pBuf )
 347 {
 348     Clear();
 349
 350     if ((pBuf == NULL) || (nSize == 0))
 351         return false;
 352
 353     PicHandle picHandle = (PicHandle)NewHandle( nSize );
 354     memcpy( *picHandle, pBuf, nSize );
 355     m_pictHandle = picHandle;
 356
 357     // ownership is transferred to the bitmap
 358     m_pictCreated = false;
 359     Rect frame;
 360     wxMacGetPictureBounds( picHandle, &frame );
 361
 362     wxMetafile mf;
 363     mf.SetHMETAFILE( (WXHMETAFILE)m_pictHandle );
 364     wxMemoryDC mdc;
 365     m_bitmap.Create( frame.right - frame.left, frame.bottom - frame.top );
 366     mdc.SelectObject( m_bitmap );
 367     mf.Play( &mdc );
 368     mdc.SelectObject( wxNullBitmap );
 369
 370     return m_bitmap.Ok();
 371 }
 372
 373 #endif