src/motif/clipbrd.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        clipbrd.cpp
   3 // Purpose:     Clipboard functionality
   4 // Author:      Julian Smart
   5 // Modified by:
   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 #include "wx/app.h"
  18 #include "wx/frame.h"
  19 #include "wx/bitmap.h"
  20 #include "wx/utils.h"
  21 #include "wx/metafile.h"
  22 #include "wx/clipbrd.h"
  23 #include "wx/dataobj.h"
  24
  25 #include <Xm/Xm.h>
  26 #include <Xm/CutPaste.h>
  27
  28 #include <string.h>
  29
  30 #if !USE_SHARED_LIBRARY
  31 // IMPLEMENT_DYNAMIC_CLASS(wxClipboard, wxObject)
  32 // IMPLEMENT_ABSTRACT_CLASS(wxClipboardClient, wxObject)
  33 #endif
  34
  35 static bool gs_clipboardIsOpen = FALSE;
  36
  37 bool wxOpenClipboard()
  38 {
  39     if (!gs_clipboardIsOpen)
  40     {
  41         gs_clipboardIsOpen = TRUE;
  42         return TRUE;
  43     }
  44     else
  45         return FALSE;
  46 }
  47
  48 bool wxCloseClipboard()
  49 {
  50     if (gs_clipboardIsOpen)
  51     {
  52         gs_clipboardIsOpen = FALSE;
  53         return TRUE;
  54     }
  55     else
  56         return FALSE;
  57 }
  58
  59 bool wxEmptyClipboard()
  60 {
  61     // No equivalent in Motif
  62     return TRUE;
  63 }
  64
  65 bool wxClipboardOpen()
  66 {
  67     return gs_clipboardIsOpen;
  68 }
  69
  70 bool wxIsClipboardFormatAvailable(wxDataFormat dataFormat)
  71 {
  72     // Only text is supported.
  73     if (dataFormat != wxDF_TEXT)
  74         return FALSE;
  75
  76     unsigned long numBytes = 0;
  77     long privateId = 0;
  78
  79     Window window = (Window) 0;
  80     if (wxTheApp->GetTopWindow())
  81         window = XtWindow( (Widget) wxTheApp->GetTopWindow()->GetTopWidget() );
  82
  83     int success = XmClipboardRetrieve((Display*) wxGetDisplay(),
  84       window, "TEXT", (XtPointer) 0, 0, & numBytes, & privateId) ;
  85
  86     // Assume only text is supported. If we have anything at all,
  87     // or the clipboard is locked so we're not sure, we say we support it.
  88     if (success == ClipboardNoData)
  89         return FALSE;
  90     else
  91         return TRUE;
  92 }
  93
  94 bool wxSetClipboardData(wxDataFormat dataFormat, wxObject *obj, int width, int height)
  95 {
  96     if (dataFormat != wxDF_TEXT)
  97         return FALSE;
  98
  99     char* data = (char*) obj;
 100
 101     XmString text = XmStringCreateSimple ("CLIPBOARD");
 102     Window window = (Window) 0;
 103     if (wxTheApp->GetTopWindow())
 104         window = XtWindow( (Widget) wxTheApp->GetTopWindow()->GetTopWidget() );
 105
 106     long itemId = 0;
 107     int result = 0;
 108
 109     while ((result =
 110       XmClipboardStartCopy((Display*) wxGetDisplay(),
 111        window,
 112        text,
 113        XtLastTimestampProcessed((Display*) wxGetDisplay()),
 114        (Widget) 0,
 115        (XmCutPasteProc) 0,
 116        & itemId)) != ClipboardSuccess)
 117
 118        ;
 119
 120     XmStringFree (text);
 121
 122     long dataId = 0;
 123     while ((result =
 124       XmClipboardCopy((Display*) wxGetDisplay(),
 125        window,
 126        itemId,
 127        "TEXT",
 128        (XtPointer) data,
 129        strlen(data) + 1,
 130        0,
 131        & dataId)) != ClipboardSuccess)
 132
 133        ;
 134
 135     while (( result =
 136        XmClipboardEndCopy((Display*) wxGetDisplay(),
 137          window, itemId) ) != ClipboardSuccess)
 138
 139        ;
 140
 141     return TRUE;
 142 }
 143
 144 wxObject *wxGetClipboardData(wxDataFormat dataFormat, long *len)
 145 {
 146     if (dataFormat != wxDF_TEXT)
 147         return (wxObject*) NULL;
 148
 149     bool done = FALSE;
 150     long id = 0;
 151     unsigned long numBytes = 0;
 152     int result = 0;
 153     Window window = (Window) 0;
 154     if (wxTheApp->GetTopWindow())
 155         window = XtWindow( (Widget) wxTheApp->GetTopWindow()->GetTopWidget() );
 156
 157     int currentDataSize = 256;
 158     char* data = new char[currentDataSize];
 159
 160     while (!done)
 161     {
 162         if (result == ClipboardTruncate)
 163         {
 164             delete[] data;
 165             currentDataSize = 2*currentDataSize;
 166             data = new char[currentDataSize];
 167         }
 168         result = XmClipboardRetrieve((Display*) wxGetDisplay(),
 169           window,
 170           "TEXT",
 171           (XtPointer) data,
 172           currentDataSize,
 173           &numBytes,
 174           &id);
 175
 176         switch (result)
 177           {
 178           case ClipboardSuccess:
 179             {
 180               if (len)
 181                 *len = strlen(data) + 1;
 182               return (wxObject*) data;
 183               break;
 184             }
 185           case ClipboardTruncate:
 186           case ClipboardLocked:
 187             {
 188               break;
 189             }
 190           default:
 191           case ClipboardNoData:
 192             {
 193               return (wxObject*) NULL;
 194               break;
 195             }
 196           }
 197
 198     }
 199
 200     return NULL;
 201 }
 202
 203 wxDataFormat  wxEnumClipboardFormats(wxDataFormat dataFormat)
 204 {
 205     // Only wxDF_TEXT supported
 206     if (dataFormat == (wxDataFormat) 0)
 207        return wxDF_TEXT;
 208     else
 209        return (wxDataFormat) 0;
 210 }
 211
 212 wxDataFormat  wxRegisterClipboardFormat(char *formatName)
 213 {
 214     // Not supported
 215     return (wxDataFormat) 0;
 216 }
 217
 218 bool wxGetClipboardFormatName(wxDataFormat dataFormat, char *formatName, int maxCount)
 219 {
 220     // Only wxDF_TEXT supported
 221     if (dataFormat == wxDF_TEXT)
 222     {
 223        strcpy(formatName, "TEXT");
 224        return TRUE;
 225     }
 226     else
 227        return FALSE;
 228 }
 229
 230 //-----------------------------------------------------------------------------
 231 // wxClipboard
 232 //-----------------------------------------------------------------------------
 233
 234 IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject)
 235
 236 wxClipboard* wxTheClipboard = (wxClipboard*) NULL;
 237
 238 wxClipboard::wxClipboard()
 239 {
 240     m_open = FALSE;
 241 }
 242
 243 wxClipboard::~wxClipboard()
 244 {
 245     Clear();
 246 }
 247
 248 void wxClipboard::Clear()
 249 {
 250     wxNode* node = m_data.First();
 251     while (node)
 252     {
 253         wxDataObject* data = (wxDataObject*) node->Data();
 254         delete data;
 255         node = node->Next();
 256     }
 257     m_data.Clear();
 258 }
 259
 260 bool wxClipboard::Open()
 261 {
 262     wxCHECK_MSG( !m_open, FALSE, "clipboard already open" );
 263
 264     m_open = TRUE;
 265
 266     return wxOpenClipboard();
 267 }
 268
 269 bool wxClipboard::SetData( wxDataObject *data )
 270 {
 271     wxCHECK_MSG( data, FALSE, "data is invalid" );
 272     wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
 273
 274     switch (data->GetFormat())
 275     {
 276         case wxDF_TEXT:
 277         case wxDF_OEMTEXT:
 278         {
 279             wxTextDataObject* textDataObject = (wxTextDataObject*) data;
 280             wxString str(textDataObject->GetText());
 281             return wxSetClipboardData(data->GetFormat(), (wxObject*) (const char*) str);
 282             break;
 283         }
 284         case wxDF_BITMAP:
 285         case wxDF_DIB:
 286         {
 287             wxBitmapDataObject* bitmapDataObject = (wxBitmapDataObject*) data;
 288             wxBitmap bitmap(bitmapDataObject->GetBitmap());
 289             return wxSetClipboardData(data->GetFormat(), & bitmap);
 290             break;
 291         }
 292         default:
 293         {
 294             return FALSE;
 295         }
 296     }
 297
 298     return FALSE;
 299 }
 300
 301 void wxClipboard::Close()
 302 {
 303     wxCHECK_RET( m_open, "clipboard not open" );
 304
 305     m_open = FALSE;
 306     wxCloseClipboard();
 307 }
 308
 309 bool wxClipboard::IsSupportedFormat( wxDataFormat format, const wxString& WXUNUSED(id) )
 310 {
 311     return wxIsClipboardFormatAvailable(format);
 312 }
 313
 314 bool wxClipboard::GetData( wxDataObject *data )
 315 {
 316     wxCHECK_MSG( m_open, FALSE, "clipboard not open" );
 317
 318     switch (data->GetFormat())
 319     {
 320         case wxDF_TEXT:
 321         case wxDF_OEMTEXT:
 322         {
 323             wxTextDataObject* textDataObject = (wxTextDataObject*) data;
 324             char* s = (char*) wxGetClipboardData(data->GetFormat());
 325             if (s)
 326             {
 327                 textDataObject->SetText(s);
 328                 delete[] s;
 329                 return TRUE;
 330             }
 331             else
 332                 return FALSE;
 333             break;
 334         }
 335         case wxDF_BITMAP:
 336         case wxDF_DIB:
 337         {
 338             wxBitmapDataObject* bitmapDataObject = (wxBitmapDataObject*) data;
 339             wxBitmap* bitmap = (wxBitmap*) wxGetClipboardData(data->GetFormat());
 340             if (bitmap)
 341             {
 342                 bitmapDataObject->SetBitmap(* bitmap);
 343                 delete bitmap;
 344                 return TRUE;
 345             }
 346             else
 347                 return FALSE;
 348             break;
 349         }
 350         default:
 351         {
 352             return FALSE;
 353         }
 354     }
 355     return FALSE;
 356 }
 357
 358 //-----------------------------------------------------------------------------
 359 // wxClipboardModule
 360 //-----------------------------------------------------------------------------
 361
 362 IMPLEMENT_DYNAMIC_CLASS(wxClipboardModule,wxModule)
 363
 364 bool wxClipboardModule::OnInit()
 365 {
 366     wxTheClipboard = new wxClipboard();
 367
 368     return TRUE;
 369 }
 370
 371 void wxClipboardModule::OnExit()
 372 {
 373     if (wxTheClipboard) delete wxTheClipboard;
 374     wxTheClipboard = (wxClipboard*) NULL;
 375 }
 376
 377
 378 #if 0
 379
 380 /*
 381 * Old clipboard implementation by Matthew Flatt
 382 */
 383
 384 wxClipboard *wxTheClipboard = NULL;
 385
 386 void wxInitClipboard()
 387 {
 388     if (!wxTheClipboard)
 389         wxTheClipboard = new wxClipboard;
 390 }
 391
 392 wxClipboard::wxClipboard()
 393 {
 394     clipOwner = NULL;
 395     cbString = NULL;
 396 }
 397
 398 wxClipboard::~wxClipboard()
 399 {
 400     if (clipOwner)
 401         clipOwner->BeingReplaced();
 402     if (cbString)
 403         delete[] cbString;
 404 }
 405
 406 static int FormatStringToID(char *str)
 407 {
 408     if (!strcmp(str, "TEXT"))
 409         return wxDF_TEXT;
 410
 411     return wxRegisterClipboardFormat(str);
 412 }
 413
 414 void wxClipboard::SetClipboardClient(wxClipboardClient *client, long time)
 415 {
 416     bool got_selection;
 417
 418     if (clipOwner)
 419         clipOwner->BeingReplaced();
 420     clipOwner = client;
 421     if (cbString) {
 422         delete[] cbString;
 423         cbString = NULL;
 424     }
 425
 426     if (wxOpenClipboard()) {
 427         char **formats, *data;
 428         int i;
 429         int ftype;
 430         long size;
 431
 432         formats = clipOwner->formats.ListToArray(FALSE);
 433         for (i = clipOwner->formats.Number(); i--; ) {
 434             ftype = FormatStringToID(formats[i]);
 435             data = clipOwner->GetData(formats[i], &size);
 436             if (!wxSetClipboardData(ftype, (wxObject *)data, size, 1)) {
 437                 got_selection = FALSE;
 438                 break;
 439             }
 440         }
 441
 442         if (i < 0)
 443             got_selection = wxCloseClipboard();
 444     } else
 445         got_selection = FALSE;
 446
 447     got_selection = FALSE; // Assume another process takes over
 448
 449     if (!got_selection) {
 450         clipOwner->BeingReplaced();
 451         clipOwner = NULL;
 452     }
 453 }
 454
 455 wxClipboardClient *wxClipboard::GetClipboardClient()
 456 {
 457     return clipOwner;
 458 }
 459
 460 void wxClipboard::SetClipboardString(char *str, long time)
 461 {
 462     bool got_selection;
 463
 464     if (clipOwner) {
 465         clipOwner->BeingReplaced();
 466         clipOwner = NULL;
 467     }
 468     if (cbString)
 469         delete[] cbString;
 470
 471     cbString = str;
 472
 473     if (wxOpenClipboard()) {
 474         if (!wxSetClipboardData(wxDF_TEXT, (wxObject *)str))
 475             got_selection = FALSE;
 476         else
 477             got_selection = wxCloseClipboard();
 478     } else
 479         got_selection = FALSE;
 480
 481     got_selection = FALSE; // Assume another process takes over
 482
 483     if (!got_selection) {
 484         delete[] cbString;
 485         cbString = NULL;
 486     }
 487 }
 488
 489 char *wxClipboard::GetClipboardString(long time)
 490 {
 491     char *str;
 492     long length;
 493
 494     str = GetClipboardData("TEXT", &length, time);
 495     if (!str) {
 496         str = new char[1];
 497         *str = 0;
 498     }
 499
 500     return str;
 501 }
 502
 503 char *wxClipboard::GetClipboardData(char *format, long *length, long time)
 504 {
 505     if (clipOwner)  {
 506         if (clipOwner->formats.Member(format))
 507             return clipOwner->GetData(format, length);
 508         else
 509             return NULL;
 510     } else if (cbString) {
 511         if (!strcmp(format, "TEXT"))
 512             return copystring(cbString);
 513         else
 514             return NULL;
 515     } else {
 516         if (wxOpenClipboard()) {
 517             receivedString = (char *)wxGetClipboardData(FormatStringToID(format),
 518                 length);
 519             wxCloseClipboard();
 520         } else
 521             receivedString = NULL;
 522
 523         return receivedString;
 524     }
 525 }
 526 #endif
 527