src/motif/clipbrd.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        clipbrd.cpp
   3 // Purpose:     Clipboard functionality
   4 // Author:      Julian Smart
   5 // Modified by: Mattia Barbon (added support for generic wxDataObjects)
   6 // Created:     17/09/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation
  14 #pragma implementation "clipbrd.h"
  15 #endif
  16
  17 #ifdef __VMS
  18 #include "wx/vms_x_fix.h"
  19 #define XtWindow XTWINDOW
  20 #define XtScreen XTSCREEN
  21 #define XtParent XTPARENT
  22 #define XtIsRealized XTISREALIZED
  23 #define XtDisplay XTDISPLAY
  24 #endif
  25
  26 #include "wx/defs.h"
  27
  28 #if wxUSE_CLIPBOARD
  29
  30 #include "wx/app.h"
  31 #include "wx/bitmap.h"
  32 #include "wx/utils.h"
  33 #include "wx/clipbrd.h"
  34 #include "wx/dataobj.h"
  35 #include "wx/ptr_scpd.h"
  36
  37 #ifdef __VMS__
  38 #pragma message disable nosimpint
  39
  40 #endif
  41 #include <Xm/Xm.h>
  42 #include <Xm/CutPaste.h>
  43 #ifdef __VMS__
  44 #pragma message enable nosimpint
  45 #endif
  46
  47 #include "wx/motif/private.h"
  48
  49 bool wxOpenClipboard()
  50 {
  51     return wxTheClipboard->Open();
  52 }
  53
  54 bool wxCloseClipboard()
  55 {
  56     wxTheClipboard->Close();
  57
  58     return true;
  59 }
  60
  61 bool wxEmptyClipboard()
  62 {
  63     wxTheClipboard->Clear();
  64     return true;
  65 }
  66
  67 bool wxClipboardOpen()
  68 {
  69     return wxTheClipboard->IsOpened();
  70 }
  71
  72 bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
  73 {
  74     return wxTheClipboard->IsSupported( dataFormat );
  75 }
  76
  77 bool wxSetClipboardData(wxDataFormat dataFormat, wxObject *obj,
  78                         int WXUNUSED(width), int WXUNUSED(height))
  79 {
  80     wxDataObject* dobj = NULL;
  81
  82     if( dataFormat == wxDF_TEXT )
  83     {
  84         wxChar* data = (wxChar*)obj;
  85         dobj = new wxTextDataObject( data );
  86     }
  87     else if( dataFormat = wxDF_BITMAP )
  88     {
  89         wxBitmap* data = (wxBitmap*)obj;
  90         dobj = new wxBitmapDataObject( *data );
  91     }
  92
  93     if( !dobj )
  94         return false;
  95
  96     return wxTheClipboard->SetData( dobj );
  97 }
  98
  99 wxObject *wxGetClipboardData(wxDataFormat dataFormat, long *len)
 100 {
 101     wxDataObject* dobj = NULL;
 102     wxTextDataObject* tobj = NULL;
 103     wxBitmapDataObject* bobj = NULL;
 104
 105     if( dataFormat == wxDF_TEXT )
 106     {
 107         dobj = tobj = new wxTextDataObject;
 108     }
 109     else if( dataFormat = wxDF_BITMAP )
 110     {
 111         dobj = bobj = new wxBitmapDataObject;
 112     }
 113
 114     if( !dobj || !wxTheClipboard->GetData( *dobj ) )
 115         return NULL;
 116
 117     if( tobj )
 118     {
 119         wxString text = tobj->GetText();
 120         wxChar* buf = new wxChar[text.length() + 1];
 121
 122         if( len ) *len = text.length();
 123         return (wxObject*)wxStrcpy( buf, text.c_str() );
 124     }
 125     else if( bobj )
 126     {
 127         if( len ) *len = 0;
 128         return new wxBitmap( bobj->GetBitmap() );
 129     }
 130
 131     return NULL; // just in case...
 132 }
 133
 134 wxDataFormat wxEnumClipboardFormats(wxDataFormat dataFormat)
 135 {
 136     // Only wxDF_TEXT supported
 137     if (dataFormat == wxDF_TEXT)
 138        return wxDF_TEXT;
 139     else
 140        return wxDF_INVALID;
 141 }
 142
 143 wxDataFormat wxRegisterClipboardFormat(char *WXUNUSED(formatName))
 144 {
 145     // Not supported
 146     return wxDF_INVALID;
 147 }
 148
 149 bool wxGetClipboardFormatName(wxDataFormat dataFormat, char *formatName,
 150                               int maxCount)
 151 {
 152     wxStrncpy( formatName, dataFormat.GetId().c_str(), maxCount );
 153
 154     return true;
 155 }
 156
 157 //-----------------------------------------------------------------------------
 158 // wxClipboard
 159 //-----------------------------------------------------------------------------
 160
 161 struct wxDataIdToDataObject
 162 {
 163     wxDataIdToDataObject( wxDataObject* o, long d, size_t s )
 164         : object( o ), size( s ), dataId( d ) { }
 165
 166     wxDataObject* object;
 167     size_t        size;
 168     long          dataId;
 169 };
 170
 171 #include "wx/listimpl.cpp"
 172
 173 WX_DEFINE_LIST(wxDataObjectList);
 174 WX_DEFINE_LIST(wxDataIdToDataObjectList);
 175
 176 #if wxCHECK_LESSTIF()
 177 static void wxClipboardCallback( Widget widget, int* data_id,
 178                                  int* priv, int* reason );
 179 #else
 180 static void wxClipboardCallback( Widget widget, long* data_id,
 181                                  long* priv, int* reason );
 182 #endif
 183
 184 IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
 185
 186 wxClipboard::wxClipboard()
 187 {
 188     m_open = false;
 189 }
 190
 191 wxClipboard::~wxClipboard()
 192 {
 193     Clear();
 194 }
 195
 196 void wxClipboard::Clear()
 197 {
 198     wxDataObjectList::Node* node = m_data.GetFirst();
 199     while (node)
 200     {
 201         delete node->GetData();
 202         node = node->GetNext();
 203     }
 204     m_data.Clear();
 205
 206     for( wxDataIdToDataObjectList::Node* node2 = m_idToObject.GetFirst();
 207          node2; node2 = node2->GetNext() )
 208         delete node->GetData();
 209     m_idToObject.Clear();
 210 }
 211
 212 bool wxClipboard::Open()
 213 {
 214     wxCHECK_MSG( !m_open, false, "clipboard already open" );
 215
 216     m_open = true;
 217
 218     return true;
 219 }
 220
 221 bool wxClipboard::SetData( wxDataObject *data )
 222 {
 223     wxCHECK_MSG( data, false, "data is invalid" );
 224     wxCHECK_MSG( m_open, false, "clipboard not open" );
 225
 226     Clear();
 227
 228     return AddData( data );
 229 }
 230
 231 wxDECLARE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
 232 wxDEFINE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
 233
 234 #if wxCHECK_LESSTIF()
 235 void wxClipboardCallback( Widget xwidget, int* data_id,
 236                           int* priv, int* reason )
 237 #else
 238 void wxClipboardCallback( Widget xwidget, long* data_id,
 239                           long* priv, int* reason )
 240 #endif
 241 {
 242     Display* xdisplay = XtDisplay( xwidget );
 243     Window xwindow = XtWindow( xwidget );
 244     wxDataObject* dobj = NULL;
 245     size_t size = 0;
 246
 247     for( wxDataIdToDataObjectList::Node* node2 =
 248              wxTheClipboard->m_idToObject.GetFirst();
 249          node2; node2 = node2->GetNext() )
 250     {
 251         wxDataIdToDataObject* dido = node2->GetData();
 252         if( dido->dataId == *data_id )
 253         {
 254             dobj = dido->object;
 255             size = dido->size;
 256             break;
 257         }
 258     }
 259
 260     if( !dobj ) return;
 261
 262     wxCharBuffer buffer(size);
 263     size_t count = dobj->GetFormatCount( wxDataObject::Get );
 264     wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
 265     dobj->GetAllFormats( dfarr.get(), wxDataObject::Get );
 266
 267     if( !dobj->GetDataHere( dfarr[*priv], buffer.data() ) )
 268         return;
 269
 270     while( XmClipboardCopyByName( xdisplay, xwindow, *data_id,
 271                                   buffer.data(), size, 0 )
 272            == XmClipboardLocked );
 273 }
 274
 275 bool wxClipboard::AddData( wxDataObject *data )
 276 {
 277     wxCHECK_MSG( data, false, "data is invalid" );
 278     wxCHECK_MSG( m_open, false, "clipboard not open" );
 279
 280     m_data.Append( data );
 281
 282     Display* xdisplay = wxGlobalDisplay();
 283     Widget xwidget = (Widget)wxTheApp->GetTopLevelWidget();
 284     Window xwindow = XtWindow( xwidget );
 285     wxXmString label( wxTheApp->GetAppName() );
 286     Time timestamp = XtLastTimestampProcessed( xdisplay );
 287     long itemId;
 288
 289     int retval;
 290
 291     while( ( retval = XmClipboardStartCopy( xdisplay, xwindow, label(),
 292                                             timestamp, xwidget,
 293                                             wxClipboardCallback,
 294                                             &itemId ) )
 295            == XmClipboardLocked );
 296     if( retval != XmClipboardSuccess )
 297         return false;
 298
 299     size_t count = data->GetFormatCount( wxDataObject::Get );
 300     wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
 301     data->GetAllFormats( dfarr.get(), wxDataObject::Get );
 302
 303     for( size_t i = 0; i < count; ++i )
 304     {
 305         size_t size = data->GetDataSize( dfarr[i] );
 306         long data_id;
 307         wxString id = dfarr[i].GetId();
 308
 309         while( ( retval = XmClipboardCopy( xdisplay, xwindow, itemId,
 310                                            wxConstCast(id.c_str(), char),
 311                                            NULL, size, i, &data_id ) )
 312                == XmClipboardLocked );
 313
 314         m_idToObject.Append( new wxDataIdToDataObject( data, data_id, size ) );
 315     }
 316
 317     while( XmClipboardEndCopy( xdisplay, xwindow, itemId )
 318            == XmClipboardLocked );
 319
 320     return true;
 321 }
 322
 323 void wxClipboard::Close()
 324 {
 325     wxCHECK_RET( m_open, "clipboard not open" );
 326
 327     m_open = false;
 328 }
 329
 330 bool wxClipboard::IsSupported(const wxDataFormat& format)
 331 {
 332     Display* xdisplay = wxGlobalDisplay();
 333     Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
 334     bool isSupported = false;
 335     int retval, count;
 336     unsigned long  max_name_length;
 337     wxString id = format.GetId();
 338
 339     while( ( retval = XmClipboardLock( xdisplay, xwindow ) )
 340            == XmClipboardLocked );
 341     if( retval != XmClipboardSuccess )
 342         return false;
 343
 344     if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
 345         == XmClipboardSuccess )
 346     {
 347         wxCharBuffer buf( max_name_length + 1 );
 348         unsigned long copied;
 349
 350         for( int i = 0; i < count; ++i )
 351         {
 352             if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
 353                                           (XtPointer)buf.data(),
 354                                           max_name_length, &copied )
 355                 != XmClipboardSuccess )
 356                 continue;
 357
 358             buf.data()[copied] = '\0';
 359
 360             if( buf == id )
 361             {
 362                 isSupported = true;
 363                 break;
 364             }
 365         }
 366     }
 367
 368     XmClipboardUnlock( xdisplay, xwindow, False );
 369
 370     return isSupported;
 371 }
 372
 373 class wxClipboardEndRetrieve
 374 {
 375 public:
 376     wxClipboardEndRetrieve( Display* display, Window window )
 377         : m_display( display ), m_window( window ) { }
 378     ~wxClipboardEndRetrieve()
 379     {
 380         while( XmClipboardEndRetrieve( m_display, m_window )
 381                == XmClipboardLocked );
 382     }
 383 private:
 384     Display* m_display;
 385     Window m_window;
 386 };
 387
 388 bool wxClipboard::GetData( wxDataObject& data )
 389 {
 390     wxCHECK_MSG( m_open, false, "clipboard not open" );
 391
 392     Display* xdisplay = wxGlobalDisplay();
 393     Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
 394     Time timestamp = XtLastTimestampProcessed( xdisplay );
 395
 396     wxDataFormat chosenFormat;
 397     int retval;
 398
 399     ///////////////////////////////////////////////////////////////////////////
 400     // determine if the cliboard holds any format we like
 401     ///////////////////////////////////////////////////////////////////////////
 402     while( ( retval = XmClipboardStartRetrieve( xdisplay, xwindow,
 403                                                 timestamp ) )
 404            == XmClipboardLocked );
 405     if( retval != XmClipboardSuccess )
 406         return false;
 407
 408     wxClipboardEndRetrieve endRetrieve( xdisplay, xwindow );
 409
 410     int count;
 411     unsigned long max_name_length;
 412     size_t dfcount = data.GetFormatCount( wxDataObject::Set );
 413     wxDataFormatScopedArray dfarr( new wxDataFormat[dfcount] );
 414     data.GetAllFormats( dfarr.get(), wxDataObject::Set );
 415
 416     if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
 417         == XmClipboardSuccess )
 418     {
 419         wxCharBuffer buf( max_name_length + 1 );
 420         unsigned long copied;
 421
 422         for( int i = 0; i < count; ++i )
 423         {
 424             if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
 425                                           (XtPointer)buf.data(),
 426                                           max_name_length, &copied )
 427                 != XmClipboardSuccess )
 428                 continue;
 429
 430             buf.data()[copied] = '\0';
 431
 432             // try preferred format
 433             if( buf == data.GetPreferredFormat( wxDataObject::Set ).GetId() )
 434             {
 435                 chosenFormat = data.GetPreferredFormat( wxDataObject::Set );
 436                 break;
 437             }
 438
 439             // try all other formats
 440             for( size_t i = 0; i < dfcount; ++i )
 441             {
 442                 if( buf == dfarr[i].GetId() )
 443                     chosenFormat = dfarr[i];
 444             }
 445         }
 446     }
 447
 448     if( chosenFormat == wxDF_INVALID )
 449         return false;
 450
 451     ///////////////////////////////////////////////////////////////////////////
 452     // now retrieve the data
 453     ///////////////////////////////////////////////////////////////////////////
 454     unsigned long length, dummy1;
 455     long dummy2;
 456     wxString id = chosenFormat.GetId();
 457
 458     while( ( retval = XmClipboardInquireLength( xdisplay, xwindow,
 459                                                 wxConstCast(id.c_str(), char),
 460                                                 &length ) )
 461            == XmClipboardLocked );
 462     if( retval != XmClipboardSuccess )
 463         return false;
 464
 465     wxCharBuffer buf(length);
 466
 467     while( ( retval = XmClipboardRetrieve( xdisplay, xwindow,
 468                                            wxConstCast(id.c_str(), char),
 469                                            (XtPointer)buf.data(),
 470                                            length, &dummy1, &dummy2 ) )
 471            == XmClipboardLocked );
 472     if( retval != XmClipboardSuccess )
 473         return false;
 474
 475     if( !data.SetData( chosenFormat, length, buf.data() ) )
 476         return false;
 477
 478     return true;
 479 }
 480
 481 #endif // wxUSE_CLIPBOARD