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 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13 #pragma implementation
  14 #pragma implementation "clipbrd.h"
  15 #endif
  16
  17 // For compilers that support precompilation, includes "wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __VMS
  21 #include "wx/vms_x_fix.h"
  22 #define XtWindow XTWINDOW
  23 #define XtScreen XTSCREEN
  24 #define XtParent XTPARENT
  25 #define XtIsRealized XTISREALIZED
  26 #define XtDisplay XTDISPLAY
  27 #endif
  28
  29 #include "wx/defs.h"
  30
  31 #if wxUSE_CLIPBOARD
  32
  33 #include "wx/app.h"
  34 #include "wx/bitmap.h"
  35 #include "wx/utils.h"
  36 #include "wx/clipbrd.h"
  37 #include "wx/dataobj.h"
  38 #include "wx/ptr_scpd.h"
  39
  40 #ifdef __VMS__
  41 #pragma message disable nosimpint
  42
  43 #endif
  44 #include <Xm/Xm.h>
  45 #include <Xm/CutPaste.h>
  46 #ifdef __VMS__
  47 #pragma message enable nosimpint
  48 #endif
  49
  50 #include "wx/motif/private.h"
  51
  52 bool wxOpenClipboard()
  53 {
  54     return wxTheClipboard->Open();
  55 }
  56
  57 bool wxCloseClipboard()
  58 {
  59     wxTheClipboard->Close();
  60
  61     return true;
  62 }
  63
  64 bool wxEmptyClipboard()
  65 {
  66     wxTheClipboard->Clear();
  67     return true;
  68 }
  69
  70 bool wxClipboardOpen()
  71 {
  72     return wxTheClipboard->IsOpened();
  73 }
  74
  75 bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
  76 {
  77     return wxTheClipboard->IsSupported( dataFormat );
  78 }
  79
  80 bool wxSetClipboardData(wxDataFormat dataFormat, wxObject *obj,
  81                         int WXUNUSED(width), int WXUNUSED(height))
  82 {
  83     wxDataObject* dobj = NULL;
  84
  85     if( dataFormat == wxDF_TEXT )
  86     {
  87         wxChar* data = (wxChar*)obj;
  88         dobj = new wxTextDataObject( data );
  89     }
  90     else if( dataFormat = wxDF_BITMAP )
  91     {
  92         wxBitmap* data = (wxBitmap*)obj;
  93         dobj = new wxBitmapDataObject( *data );
  94     }
  95
  96     if( !dobj )
  97         return false;
  98
  99     return wxTheClipboard->SetData( dobj );
 100 }
 101
 102 wxObject *wxGetClipboardData(wxDataFormat dataFormat, long *len)
 103 {
 104     wxDataObject* dobj = NULL;
 105     wxTextDataObject* tobj = NULL;
 106     wxBitmapDataObject* bobj = NULL;
 107
 108     if( dataFormat == wxDF_TEXT )
 109     {
 110         dobj = tobj = new wxTextDataObject;
 111     }
 112     else if( dataFormat = wxDF_BITMAP )
 113     {
 114         dobj = bobj = new wxBitmapDataObject;
 115     }
 116
 117     if( !dobj || !wxTheClipboard->GetData( *dobj ) )
 118         return NULL;
 119
 120     if( tobj )
 121     {
 122         wxString text = tobj->GetText();
 123         wxChar* buf = new wxChar[text.length() + 1];
 124
 125         if( len ) *len = text.length();
 126         return (wxObject*)wxStrcpy( buf, text.c_str() );
 127     }
 128     else if( bobj )
 129     {
 130         if( len ) *len = 0;
 131         return new wxBitmap( bobj->GetBitmap() );
 132     }
 133
 134     return NULL; // just in case...
 135 }
 136
 137 wxDataFormat wxEnumClipboardFormats(wxDataFormat dataFormat)
 138 {
 139     // Only wxDF_TEXT supported
 140     if (dataFormat == wxDF_TEXT)
 141        return wxDF_TEXT;
 142     else
 143        return wxDF_INVALID;
 144 }
 145
 146 wxDataFormat wxRegisterClipboardFormat(char *WXUNUSED(formatName))
 147 {
 148     // Not supported
 149     return wxDF_INVALID;
 150 }
 151
 152 bool wxGetClipboardFormatName(wxDataFormat dataFormat, char *formatName,
 153                               int maxCount)
 154 {
 155     wxStrncpy( formatName, dataFormat.GetId().c_str(), maxCount );
 156
 157     return true;
 158 }
 159
 160 //-----------------------------------------------------------------------------
 161 // wxClipboard
 162 //-----------------------------------------------------------------------------
 163
 164 struct wxDataIdToDataObject
 165 {
 166     wxDataIdToDataObject( wxDataObject* o, long d, size_t s )
 167         : object( o ), size( s ), dataId( d ) { }
 168
 169     wxDataObject* object;
 170     size_t        size;
 171     long          dataId;
 172 };
 173
 174 #include "wx/listimpl.cpp"
 175
 176 WX_DEFINE_LIST(wxDataObjectList);
 177 WX_DEFINE_LIST(wxDataIdToDataObjectList);
 178
 179 #if wxCHECK_LESSTIF()
 180 static void wxClipboardCallback( Widget widget, int* data_id,
 181                                  int* priv, int* reason );
 182 #else
 183 static void wxClipboardCallback( Widget widget, long* data_id,
 184                                  long* priv, int* reason );
 185 #endif
 186
 187 IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
 188
 189 wxClipboard::wxClipboard()
 190 {
 191     m_open = false;
 192 }
 193
 194 wxClipboard::~wxClipboard()
 195 {
 196     Clear();
 197 }
 198
 199 void wxClipboard::Clear()
 200 {
 201     wxDataObjectList::compatibility_iterator node = m_data.GetFirst();
 202     while (node)
 203     {
 204         delete node->GetData();
 205         node = node->GetNext();
 206     }
 207     m_data.Clear();
 208
 209     for( wxDataIdToDataObjectList::compatibility_iterator node2 = m_idToObject.GetFirst();
 210          node2; node2 = node2->GetNext() )
 211         delete node->GetData();
 212     m_idToObject.Clear();
 213 }
 214
 215 bool wxClipboard::Open()
 216 {
 217     wxCHECK_MSG( !m_open, false, "clipboard already open" );
 218
 219     m_open = true;
 220
 221     return true;
 222 }
 223
 224 bool wxClipboard::SetData( wxDataObject *data )
 225 {
 226     wxCHECK_MSG( data, false, "data is invalid" );
 227     wxCHECK_MSG( m_open, false, "clipboard not open" );
 228
 229     Clear();
 230
 231     return AddData( data );
 232 }
 233
 234 wxDECLARE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
 235 wxDEFINE_SCOPED_ARRAY( wxDataFormat, wxDataFormatScopedArray );
 236
 237 #if wxCHECK_LESSTIF()
 238 void wxClipboardCallback( Widget xwidget, int* data_id,
 239                           int* priv, int* reason )
 240 #else
 241 void wxClipboardCallback( Widget xwidget, long* data_id,
 242                           long* priv, int* reason )
 243 #endif
 244 {
 245     Display* xdisplay = XtDisplay( xwidget );
 246     Window xwindow = XtWindow( xwidget );
 247     wxDataObject* dobj = NULL;
 248     size_t size = 0;
 249
 250     for( wxDataIdToDataObjectList::compatibility_iterator node2 =
 251              wxTheClipboard->m_idToObject.GetFirst();
 252          node2; node2 = node2->GetNext() )
 253     {
 254         wxDataIdToDataObject* dido = node2->GetData();
 255         if( dido->dataId == *data_id )
 256         {
 257             dobj = dido->object;
 258             size = dido->size;
 259             break;
 260         }
 261     }
 262
 263     if( !dobj ) return;
 264
 265     wxCharBuffer buffer(size);
 266     size_t count = dobj->GetFormatCount( wxDataObject::Get );
 267     wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
 268     dobj->GetAllFormats( dfarr.get(), wxDataObject::Get );
 269
 270     if( !dobj->GetDataHere( dfarr[*priv], buffer.data() ) )
 271         return;
 272
 273     while( XmClipboardCopyByName( xdisplay, xwindow, *data_id,
 274                                   buffer.data(), size, 0 )
 275            == XmClipboardLocked );
 276 }
 277
 278 bool wxClipboard::AddData( wxDataObject *data )
 279 {
 280     wxCHECK_MSG( data, false, "data is invalid" );
 281     wxCHECK_MSG( m_open, false, "clipboard not open" );
 282
 283     m_data.Append( data );
 284
 285     Display* xdisplay = wxGlobalDisplay();
 286     Widget xwidget = (Widget)wxTheApp->GetTopLevelWidget();
 287     Window xwindow = XtWindow( xwidget );
 288     wxXmString label( wxTheApp->GetAppName() );
 289     Time timestamp = XtLastTimestampProcessed( xdisplay );
 290     long itemId;
 291
 292     int retval;
 293
 294     while( ( retval = XmClipboardStartCopy( xdisplay, xwindow, label(),
 295                                             timestamp, xwidget,
 296                                             wxClipboardCallback,
 297                                             &itemId ) )
 298            == XmClipboardLocked );
 299     if( retval != XmClipboardSuccess )
 300         return false;
 301
 302     size_t count = data->GetFormatCount( wxDataObject::Get );
 303     wxDataFormatScopedArray dfarr( new wxDataFormat[count] );
 304     data->GetAllFormats( dfarr.get(), wxDataObject::Get );
 305
 306     for( size_t i = 0; i < count; ++i )
 307     {
 308         size_t size = data->GetDataSize( dfarr[i] );
 309         long data_id;
 310         wxString id = dfarr[i].GetId();
 311
 312         while( ( retval = XmClipboardCopy( xdisplay, xwindow, itemId,
 313                                            wxConstCast(id.c_str(), char),
 314                                            NULL, size, i, &data_id ) )
 315                == XmClipboardLocked );
 316
 317         m_idToObject.Append( new wxDataIdToDataObject( data, data_id, size ) );
 318     }
 319
 320     while( XmClipboardEndCopy( xdisplay, xwindow, itemId )
 321            == XmClipboardLocked );
 322
 323     return true;
 324 }
 325
 326 void wxClipboard::Close()
 327 {
 328     wxCHECK_RET( m_open, "clipboard not open" );
 329
 330     m_open = false;
 331 }
 332
 333 bool wxClipboard::IsSupported(const wxDataFormat& format)
 334 {
 335     Display* xdisplay = wxGlobalDisplay();
 336     Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
 337     bool isSupported = false;
 338     int retval, count;
 339     unsigned long  max_name_length;
 340     wxString id = format.GetId();
 341
 342     while( ( retval = XmClipboardLock( xdisplay, xwindow ) )
 343            == XmClipboardLocked );
 344     if( retval != XmClipboardSuccess )
 345         return false;
 346
 347     if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
 348         == XmClipboardSuccess )
 349     {
 350         wxCharBuffer buf( max_name_length + 1 );
 351         unsigned long copied;
 352
 353         for( int i = 0; i < count; ++i )
 354         {
 355             if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
 356                                           (XtPointer)buf.data(),
 357                                           max_name_length, &copied )
 358                 != XmClipboardSuccess )
 359                 continue;
 360
 361             buf.data()[copied] = '\0';
 362
 363             if( buf == id )
 364             {
 365                 isSupported = true;
 366                 break;
 367             }
 368         }
 369     }
 370
 371     XmClipboardUnlock( xdisplay, xwindow, False );
 372
 373     return isSupported;
 374 }
 375
 376 class wxClipboardEndRetrieve
 377 {
 378 public:
 379     wxClipboardEndRetrieve( Display* display, Window window )
 380         : m_display( display ), m_window( window ) { }
 381     ~wxClipboardEndRetrieve()
 382     {
 383         while( XmClipboardEndRetrieve( m_display, m_window )
 384                == XmClipboardLocked );
 385     }
 386 private:
 387     Display* m_display;
 388     Window m_window;
 389 };
 390
 391 bool wxClipboard::GetData( wxDataObject& data )
 392 {
 393     wxCHECK_MSG( m_open, false, "clipboard not open" );
 394
 395     Display* xdisplay = wxGlobalDisplay();
 396     Window xwindow = XtWindow( (Widget)wxTheApp->GetTopLevelWidget() );
 397     Time timestamp = XtLastTimestampProcessed( xdisplay );
 398
 399     wxDataFormat chosenFormat;
 400     int retval;
 401
 402     ///////////////////////////////////////////////////////////////////////////
 403     // determine if the cliboard holds any format we like
 404     ///////////////////////////////////////////////////////////////////////////
 405     while( ( retval = XmClipboardStartRetrieve( xdisplay, xwindow,
 406                                                 timestamp ) )
 407            == XmClipboardLocked );
 408     if( retval != XmClipboardSuccess )
 409         return false;
 410
 411     wxClipboardEndRetrieve endRetrieve( xdisplay, xwindow );
 412
 413     int count;
 414     unsigned long max_name_length;
 415     size_t dfcount = data.GetFormatCount( wxDataObject::Set );
 416     wxDataFormatScopedArray dfarr( new wxDataFormat[dfcount] );
 417     data.GetAllFormats( dfarr.get(), wxDataObject::Set );
 418
 419     if( XmClipboardInquireCount( xdisplay, xwindow, &count, &max_name_length )
 420         == XmClipboardSuccess )
 421     {
 422         wxCharBuffer buf( max_name_length + 1 );
 423         unsigned long copied;
 424
 425         for( int i = 0; i < count; ++i )
 426         {
 427             if( XmClipboardInquireFormat( xdisplay, xwindow, i + 1,
 428                                           (XtPointer)buf.data(),
 429                                           max_name_length, &copied )
 430                 != XmClipboardSuccess )
 431                 continue;
 432
 433             buf.data()[copied] = '\0';
 434
 435             // try preferred format
 436             if( buf == data.GetPreferredFormat( wxDataObject::Set ).GetId() )
 437             {
 438                 chosenFormat = data.GetPreferredFormat( wxDataObject::Set );
 439                 break;
 440             }
 441
 442             // try all other formats
 443             for( size_t i = 0; i < dfcount; ++i )
 444             {
 445                 if( buf == dfarr[i].GetId() )
 446                     chosenFormat = dfarr[i];
 447             }
 448         }
 449     }
 450
 451     if( chosenFormat == wxDF_INVALID )
 452         return false;
 453
 454     ///////////////////////////////////////////////////////////////////////////
 455     // now retrieve the data
 456     ///////////////////////////////////////////////////////////////////////////
 457     unsigned long length, dummy1;
 458     long dummy2;
 459     wxString id = chosenFormat.GetId();
 460
 461     while( ( retval = XmClipboardInquireLength( xdisplay, xwindow,
 462                                                 wxConstCast(id.c_str(), char),
 463                                                 &length ) )
 464            == XmClipboardLocked );
 465     if( retval != XmClipboardSuccess )
 466         return false;
 467
 468     wxCharBuffer buf(length);
 469
 470     while( ( retval = XmClipboardRetrieve( xdisplay, xwindow,
 471                                            wxConstCast(id.c_str(), char),
 472                                            (XtPointer)buf.data(),
 473                                            length, &dummy1, &dummy2 ) )
 474            == XmClipboardLocked );
 475     if( retval != XmClipboardSuccess )
 476         return false;
 477
 478     if( !data.SetData( chosenFormat, length, buf.data() ) )
 479         return false;
 480
 481     return true;
 482 }
 483
 484 #endif // wxUSE_CLIPBOARD