src/gtk/dataobj.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        dataobj.cpp
   3 // Purpose:     wxDataObject class
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 ///////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11     #pragma implementation "dataobj.h"
  12 #endif
  13
  14 #include "wx/dataobj.h"
  15 #include "wx/app.h"
  16 #include "wx/debug.h"
  17 #include "wx/mstream.h"
  18 #include "wx/image.h"
  19
  20 #include "gdk/gdk.h"
  21
  22
  23 //-------------------------------------------------------------------------
  24 // global data
  25 //-------------------------------------------------------------------------
  26
  27 GdkAtom  g_textAtom        = 0;
  28 GdkAtom  g_pngAtom         = 0;
  29
  30 //-------------------------------------------------------------------------
  31 // wxDataFormat
  32 //-------------------------------------------------------------------------
  33
  34 IMPLEMENT_CLASS(wxDataFormat, wxObject)
  35
  36 wxDataFormat::wxDataFormat()
  37 {
  38     PrepareFormats();
  39     m_type = wxDF_INVALID;
  40     m_hasAtom = FALSE;
  41     m_atom = (GdkAtom) 0;
  42 }
  43
  44 wxDataFormat::wxDataFormat( wxDataFormatId type )
  45 {
  46     PrepareFormats();
  47     SetType( type );
  48 }
  49
  50 wxDataFormat::wxDataFormat( const wxChar *id )
  51 {
  52     PrepareFormats();
  53     SetId( id );
  54 }
  55
  56 wxDataFormat::wxDataFormat( const wxString &id )
  57 {
  58     PrepareFormats();
  59     SetId( id );
  60 }
  61
  62 wxDataFormat::wxDataFormat( const wxDataFormat &format )
  63 {
  64     PrepareFormats();
  65     m_type = format.GetType();
  66     m_id = format.GetId();
  67     m_hasAtom = TRUE;
  68     m_atom = ((wxDataFormat &)format).GetAtom();    // const_cast
  69 }
  70
  71 wxDataFormat::wxDataFormat( const GdkAtom atom )
  72 {
  73     PrepareFormats();
  74     m_hasAtom = TRUE;
  75
  76     m_atom = atom;
  77
  78     if (m_atom == g_textAtom)
  79     {
  80         m_type = wxDF_TEXT;
  81     } else
  82     if (m_atom == GDK_TARGET_BITMAP)
  83     {
  84         m_type = wxDF_BITMAP;
  85     } else
  86     {
  87         m_type = wxDF_PRIVATE;
  88         m_id = gdk_atom_name( m_atom );
  89
  90         if (m_id == wxT("file:ALL"))
  91         {
  92             m_type = wxDF_FILENAME;
  93         }
  94     }
  95 }
  96
  97 void wxDataFormat::SetType( wxDataFormatId type )
  98 {
  99     m_type = type;
 100
 101     if (m_type == wxDF_TEXT)
 102     {
 103         m_id = wxT("STRING");
 104     }
 105     else
 106     if (m_type == wxDF_BITMAP)
 107     {
 108         m_id = wxT("image/png");
 109     }
 110     else
 111     if (m_type == wxDF_FILENAME)
 112     {
 113         m_id = wxT("file:ALL");
 114     }
 115     else
 116     {
 117        wxFAIL_MSG( wxT("invalid dataformat") );
 118     }
 119
 120     m_hasAtom = FALSE;
 121 }
 122
 123 wxDataFormatId wxDataFormat::GetType() const
 124 {
 125     return m_type;
 126 }
 127
 128 wxString wxDataFormat::GetId() const
 129 {
 130     return m_id;
 131 }
 132
 133 void wxDataFormat::SetId( const wxChar *id )
 134 {
 135     m_type = wxDF_PRIVATE;
 136     m_id = id;
 137     m_hasAtom = FALSE;
 138 }
 139
 140 GdkAtom wxDataFormat::GetAtom()
 141 {
 142     if (!m_hasAtom)
 143     {
 144         m_hasAtom = TRUE;
 145
 146         if (m_type == wxDF_TEXT)
 147         {
 148             m_atom = g_textAtom;
 149         }
 150         else
 151         if (m_type == wxDF_BITMAP)
 152         {
 153             m_atom = GDK_TARGET_BITMAP;
 154         }
 155         else
 156         if (m_type == wxDF_PRIVATE)
 157         {
 158             m_atom = gdk_atom_intern( wxMBSTRINGCAST m_id.mbc_str(), FALSE );
 159         }
 160         else
 161         if (m_type == wxDF_FILENAME)
 162         {
 163             m_atom = gdk_atom_intern( "file:ALL", FALSE );
 164         }
 165         else
 166         {
 167             m_hasAtom = FALSE;
 168             m_atom = (GdkAtom) 0;
 169         }
 170     }
 171
 172     return m_atom;
 173 }
 174
 175 void wxDataFormat::PrepareFormats()
 176 {
 177     if (!g_textAtom) g_textAtom = gdk_atom_intern( "STRING", FALSE );
 178     if (!g_pngAtom) g_pngAtom = gdk_atom_intern( "image/png", FALSE );
 179 }
 180
 181 //-------------------------------------------------------------------------
 182 // wxDataBroker
 183 //-------------------------------------------------------------------------
 184
 185 IMPLEMENT_CLASS(wxDataBroker,wxObject)
 186
 187 wxDataBroker::wxDataBroker()
 188 {
 189     m_dataObjects.DeleteContents(TRUE);
 190     m_preferred = 0;
 191 }
 192
 193 void wxDataBroker::Add( wxDataObject *dataObject, bool preferred )
 194 {
 195     if (preferred) m_preferred = m_dataObjects.GetCount();
 196     m_dataObjects.Append( dataObject );
 197 }
 198
 199 size_t wxDataBroker::GetFormatCount() const
 200 {
 201     return m_dataObjects.GetCount();
 202 }
 203
 204 wxDataFormatId wxDataBroker::GetPreferredFormat() const
 205 {
 206     wxNode *node = m_dataObjects.Nth( m_preferred );
 207
 208     wxASSERT( node );
 209
 210     wxDataObject* data_obj = (wxDataObject*)node->Data();
 211
 212     return data_obj->GetFormat().GetType();
 213 }
 214
 215 wxDataFormat &wxDataBroker::GetNthFormat( size_t nth ) const
 216 {
 217     wxNode *node = m_dataObjects.Nth( nth );
 218
 219     wxASSERT( node );
 220
 221     wxDataObject* data_obj = (wxDataObject*)node->Data();
 222
 223     return data_obj->GetFormat();
 224 }
 225
 226 bool wxDataBroker::IsSupportedFormat( wxDataFormat &format ) const
 227 {
 228     wxNode *node = m_dataObjects.First();
 229     while (node)
 230     {
 231         wxDataObject *dobj = (wxDataObject*)node->Data();
 232
 233         if (dobj->GetFormat().GetAtom() == format.GetAtom())
 234         {
 235             return TRUE;
 236         }
 237
 238         node = node->Next();
 239     }
 240
 241     return FALSE;
 242 }
 243
 244 size_t wxDataBroker::GetSize( wxDataFormat& format ) const
 245 {
 246     wxNode *node = m_dataObjects.First();
 247     while (node)
 248     {
 249         wxDataObject *dobj = (wxDataObject*)node->Data();
 250
 251         if (dobj->GetFormat().GetAtom() == format.GetAtom())
 252         {
 253             return dobj->GetSize();
 254         }
 255
 256         node = node->Next();
 257     }
 258
 259     return 0;
 260 }
 261
 262 void wxDataBroker::WriteData( wxDataFormat& format, void *dest ) const
 263 {
 264     wxNode *node = m_dataObjects.First();
 265     while (node)
 266     {
 267         wxDataObject *dobj = (wxDataObject*)node->Data();
 268
 269         if (dobj->GetFormat().GetAtom() == format.GetAtom())
 270         {
 271             dobj->WriteData( dest );
 272         }
 273
 274         node = node->Next();
 275     }
 276 }
 277
 278 //-------------------------------------------------------------------------
 279 // wxDataObject
 280 //-------------------------------------------------------------------------
 281
 282 IMPLEMENT_ABSTRACT_CLASS( wxDataObject, wxObject )
 283
 284 wxDataObject::wxDataObject()
 285 {
 286 }
 287
 288 wxDataObject::~wxDataObject()
 289 {
 290 }
 291
 292 wxDataFormat &wxDataObject::GetFormat()
 293 {
 294     return m_format;
 295 }
 296
 297 wxDataFormatId wxDataObject::GetFormatType() const
 298 {
 299     return m_format.GetType();
 300 }
 301
 302 wxString wxDataObject::GetFormatId() const
 303 {
 304     return m_format.GetId();
 305 }
 306
 307 GdkAtom wxDataObject::GetFormatAtom() const
 308 {
 309     GdkAtom ret = ((wxDataObject*) this)->m_format.GetAtom();
 310     return ret;
 311 }
 312
 313 // ----------------------------------------------------------------------------
 314 // wxTextDataObject
 315 // ----------------------------------------------------------------------------
 316
 317 IMPLEMENT_DYNAMIC_CLASS( wxTextDataObject, wxDataObject )
 318
 319 wxTextDataObject::wxTextDataObject()
 320 {
 321     m_format.SetType( wxDF_TEXT );
 322 }
 323
 324 wxTextDataObject::wxTextDataObject( const wxString& data )
 325 {
 326     m_format.SetType( wxDF_TEXT );
 327
 328     m_data = data;
 329 }
 330
 331 void wxTextDataObject::SetText( const wxString& data )
 332 {
 333     m_data = data;
 334 }
 335
 336 wxString wxTextDataObject::GetText() const
 337 {
 338     return m_data;
 339 }
 340
 341 void wxTextDataObject::WriteData( void *dest ) const
 342 {
 343     WriteString( m_data, dest );
 344 }
 345
 346 size_t wxTextDataObject::GetSize() const
 347 {
 348     return m_data.Len() + 1;
 349 }
 350
 351 void wxTextDataObject::WriteString( const wxString &str, void *dest ) const
 352 {
 353     memcpy( dest, str.mb_str(), str.Len()+1 );
 354 }
 355
 356 // ----------------------------------------------------------------------------
 357 // wxFileDataObject
 358 // ----------------------------------------------------------------------------
 359
 360 IMPLEMENT_DYNAMIC_CLASS( wxFileDataObject, wxDataObject )
 361
 362 wxFileDataObject::wxFileDataObject()
 363 {
 364     m_format.SetType( wxDF_FILENAME );
 365 }
 366
 367 void wxFileDataObject::AddFile( const wxString &file )
 368 {
 369     m_files += file;
 370     m_files += (wxChar)0;
 371 }
 372
 373 wxString wxFileDataObject::GetFiles() const
 374 {
 375     return m_files;
 376 }
 377
 378 void wxFileDataObject::WriteData( void *dest ) const
 379 {
 380     memcpy( dest, m_files.mbc_str(), GetSize() );
 381 }
 382
 383 size_t wxFileDataObject::GetSize() const
 384 {
 385     return m_files.Len() + 1;
 386 }
 387
 388 // ----------------------------------------------------------------------------
 389 // wxBitmapDataObject
 390 // ----------------------------------------------------------------------------
 391
 392 IMPLEMENT_DYNAMIC_CLASS( wxBitmapDataObject, wxDataObject )
 393
 394 wxBitmapDataObject::wxBitmapDataObject()
 395 {
 396     m_format.SetType( wxDF_BITMAP );
 397     m_pngData = (char*)NULL;
 398     m_pngSize = 0;
 399 }
 400
 401 wxBitmapDataObject::wxBitmapDataObject( const wxBitmap& bitmap )
 402 {
 403     m_format.SetType( wxDF_BITMAP );
 404     m_pngData = (char*)NULL;
 405     m_pngSize = 0;
 406     m_bitmap = bitmap;
 407     DoConvertToPng();
 408 }
 409
 410 wxBitmapDataObject::~wxBitmapDataObject()
 411 {
 412     if (m_pngData) delete[] m_pngData;
 413 }
 414
 415 void wxBitmapDataObject::SetBitmap( const wxBitmap &bitmap )
 416 {
 417     m_bitmap = bitmap;
 418     DoConvertToPng();
 419 }
 420
 421 wxBitmap wxBitmapDataObject::GetBitmap() const
 422 {
 423     return m_bitmap;
 424 }
 425
 426 void wxBitmapDataObject::WriteData( void *dest ) const
 427 {
 428     WriteBitmap( m_bitmap, dest );
 429 }
 430
 431 size_t wxBitmapDataObject::GetSize() const
 432 {
 433     return m_pngSize;
 434 }
 435
 436 void wxBitmapDataObject::WriteBitmap( const wxBitmap &WXUNUSED(bitmap), void *dest ) const
 437 {
 438 //    if (m_bitmap == bitmap)
 439         memcpy( dest, m_pngData, m_pngSize );
 440 }
 441
 442 void wxBitmapDataObject::SetPngData( const char *pngData, size_t pngSize )
 443 {
 444     if (m_pngData) delete[] m_pngData;
 445     m_pngData = (char*) NULL;
 446     m_pngSize = pngSize;
 447     m_pngData = new char[m_pngSize];
 448     memcpy( m_pngData, pngData, m_pngSize );
 449
 450     wxMemoryInputStream mstream( pngData, pngSize );
 451     wxImage image;
 452     wxPNGHandler handler;
 453     handler.LoadFile( &image, mstream );
 454     m_bitmap = image.ConvertToBitmap();
 455 }
 456
 457 void wxBitmapDataObject::DoConvertToPng()
 458 {
 459     if (m_pngData) delete[] m_pngData;
 460
 461     wxImage image( m_bitmap );
 462     wxPNGHandler handler;
 463
 464     wxCountingOutputStream count;
 465     handler.SaveFile( &image, count );
 466     m_pngSize = count.GetSize() + 100; // sometimes the size seems to vary ???
 467     m_pngData = new char[m_pngSize];
 468
 469     wxMemoryOutputStream mstream( m_pngData, m_pngSize );
 470     handler.SaveFile( &image, mstream );
 471 }
 472
 473 // ----------------------------------------------------------------------------
 474 // wxPrivateDataObject
 475 // ----------------------------------------------------------------------------
 476
 477 IMPLEMENT_DYNAMIC_CLASS( wxPrivateDataObject, wxDataObject )
 478
 479 void wxPrivateDataObject::Free()
 480 {
 481     if ( m_data )
 482         free(m_data);
 483 }
 484
 485 wxPrivateDataObject::wxPrivateDataObject()
 486 {
 487     wxString id = wxT("application/");
 488     id += wxTheApp->GetAppName();
 489
 490     m_format.SetId( id );
 491
 492     m_size = 0;
 493     m_data = (void *)NULL;
 494 }
 495
 496 void wxPrivateDataObject::SetData( const void *data, size_t size )
 497 {
 498     Free();
 499
 500     m_size = size;
 501     m_data = malloc(size);
 502
 503     memcpy( m_data, data, size );
 504 }
 505
 506 void wxPrivateDataObject::WriteData( void *dest ) const
 507 {
 508     WriteData( m_data, dest );
 509 }
 510
 511 size_t wxPrivateDataObject::GetSize() const
 512 {
 513     return m_size;
 514 }
 515
 516 void wxPrivateDataObject::WriteData( const void *data, void *dest ) const
 517 {
 518     memcpy( dest, data, GetSize() );
 519 }
 520