| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: src/gtk1/clipbrd.cpp |
| 3 | // Purpose: |
| 4 | // Author: Robert Roebling |
| 5 | // Id: $Id$ |
| 6 | // Copyright: (c) 1998 Robert Roebling |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | // For compilers that support precompilation, includes "wx.h". |
| 11 | #include "wx/wxprec.h" |
| 12 | |
| 13 | #if wxUSE_CLIPBOARD |
| 14 | |
| 15 | #include "wx/clipbrd.h" |
| 16 | |
| 17 | #ifndef WX_PRECOMP |
| 18 | #include "wx/log.h" |
| 19 | #include "wx/utils.h" |
| 20 | #include "wx/dataobj.h" |
| 21 | #endif |
| 22 | |
| 23 | #include <glib.h> |
| 24 | #include <gdk/gdk.h> |
| 25 | #include <gtk/gtk.h> |
| 26 | |
| 27 | //----------------------------------------------------------------------------- |
| 28 | // data |
| 29 | //----------------------------------------------------------------------------- |
| 30 | |
| 31 | GdkAtom g_clipboardAtom = 0; |
| 32 | GdkAtom g_targetsAtom = 0; |
| 33 | GdkAtom g_timestampAtom = 0; |
| 34 | |
| 35 | // the trace mask we use with wxLogTrace() - call |
| 36 | // wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here |
| 37 | // (there will be a *lot* of them!) |
| 38 | static const wxChar *TRACE_CLIPBOARD = _T("clipboard"); |
| 39 | |
| 40 | //----------------------------------------------------------------------------- |
| 41 | // reminder |
| 42 | //----------------------------------------------------------------------------- |
| 43 | |
| 44 | /* The contents of a selection are returned in a GtkSelectionData |
| 45 | structure. selection/target identify the request. |
| 46 | type specifies the type of the return; if length < 0, and |
| 47 | the data should be ignored. This structure has object semantics - |
| 48 | no fields should be modified directly, they should not be created |
| 49 | directly, and pointers to them should not be stored beyond the duration of |
| 50 | a callback. (If the last is changed, we'll need to add reference |
| 51 | counting) |
| 52 | |
| 53 | struct _GtkSelectionData |
| 54 | { |
| 55 | GdkAtom selection; |
| 56 | GdkAtom target; |
| 57 | GdkAtom type; |
| 58 | gint format; |
| 59 | guchar *data; |
| 60 | gint length; |
| 61 | }; |
| 62 | |
| 63 | */ |
| 64 | |
| 65 | //----------------------------------------------------------------------------- |
| 66 | // "selection_received" for targets |
| 67 | //----------------------------------------------------------------------------- |
| 68 | |
| 69 | extern "C" { |
| 70 | static void |
| 71 | targets_selection_received( GtkWidget *WXUNUSED(widget), |
| 72 | GtkSelectionData *selection_data, |
| 73 | guint32 WXUNUSED(time), |
| 74 | wxClipboard *clipboard ) |
| 75 | { |
| 76 | if ( wxTheClipboard && selection_data->length > 0 ) |
| 77 | { |
| 78 | // make sure we got the data in the correct form |
| 79 | GdkAtom type = selection_data->type; |
| 80 | if ( type != GDK_SELECTION_TYPE_ATOM ) |
| 81 | { |
| 82 | gchar* atom_name = gdk_atom_name(type); |
| 83 | if ( strcmp(atom_name, "TARGETS") ) |
| 84 | { |
| 85 | wxLogTrace( TRACE_CLIPBOARD, |
| 86 | _T("got unsupported clipboard target") ); |
| 87 | |
| 88 | clipboard->m_waiting = false; |
| 89 | g_free(atom_name); |
| 90 | return; |
| 91 | } |
| 92 | g_free(atom_name); |
| 93 | } |
| 94 | |
| 95 | #ifdef __WXDEBUG__ |
| 96 | wxDataFormat clip( selection_data->selection ); |
| 97 | wxLogTrace( TRACE_CLIPBOARD, |
| 98 | wxT("selection received for targets, clipboard %s"), |
| 99 | clip.GetId().c_str() ); |
| 100 | #endif // __WXDEBUG__ |
| 101 | |
| 102 | // the atoms we received, holding a list of targets (= formats) |
| 103 | GdkAtom *atoms = (GdkAtom *)selection_data->data; |
| 104 | |
| 105 | for (unsigned int i=0; i<selection_data->length/sizeof(GdkAtom); i++) |
| 106 | { |
| 107 | wxDataFormat format( atoms[i] ); |
| 108 | |
| 109 | wxLogTrace( TRACE_CLIPBOARD, |
| 110 | wxT("selection received for targets, format %s"), |
| 111 | format.GetId().c_str() ); |
| 112 | |
| 113 | // printf( "format %s requested %s\n", |
| 114 | // gdk_atom_name( atoms[i] ), |
| 115 | // gdk_atom_name( clipboard->m_targetRequested ) ); |
| 116 | |
| 117 | if (format == clipboard->m_targetRequested) |
| 118 | { |
| 119 | clipboard->m_waiting = false; |
| 120 | clipboard->m_formatSupported = true; |
| 121 | return; |
| 122 | } |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | clipboard->m_waiting = false; |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | //----------------------------------------------------------------------------- |
| 131 | // "selection_received" for the actual data |
| 132 | //----------------------------------------------------------------------------- |
| 133 | |
| 134 | extern "C" { |
| 135 | static void |
| 136 | selection_received( GtkWidget *WXUNUSED(widget), |
| 137 | GtkSelectionData *selection_data, |
| 138 | guint32 WXUNUSED(time), |
| 139 | wxClipboard *clipboard ) |
| 140 | { |
| 141 | if (!wxTheClipboard) |
| 142 | { |
| 143 | clipboard->m_waiting = false; |
| 144 | return; |
| 145 | } |
| 146 | |
| 147 | wxDataObject *data_object = clipboard->m_receivedData; |
| 148 | |
| 149 | if (!data_object) |
| 150 | { |
| 151 | clipboard->m_waiting = false; |
| 152 | return; |
| 153 | } |
| 154 | |
| 155 | if (selection_data->length <= 0) |
| 156 | { |
| 157 | clipboard->m_waiting = false; |
| 158 | return; |
| 159 | } |
| 160 | |
| 161 | wxDataFormat format( selection_data->target ); |
| 162 | |
| 163 | // make sure we got the data in the correct format |
| 164 | if (!data_object->IsSupportedFormat( format ) ) |
| 165 | { |
| 166 | clipboard->m_waiting = false; |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | #if 0 |
| 171 | This seems to cause problems somehow |
| 172 | // make sure we got the data in the correct form (selection type). |
| 173 | // if so, copy data to target object |
| 174 | if (selection_data->type != GDK_SELECTION_TYPE_STRING) |
| 175 | { |
| 176 | clipboard->m_waiting = false; |
| 177 | return; |
| 178 | } |
| 179 | #endif |
| 180 | |
| 181 | data_object->SetData( format, (size_t) selection_data->length, (const char*) selection_data->data ); |
| 182 | |
| 183 | wxTheClipboard->m_formatSupported = true; |
| 184 | clipboard->m_waiting = false; |
| 185 | } |
| 186 | } |
| 187 | |
| 188 | //----------------------------------------------------------------------------- |
| 189 | // "selection_clear" |
| 190 | //----------------------------------------------------------------------------- |
| 191 | |
| 192 | extern "C" { |
| 193 | static gint |
| 194 | selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) |
| 195 | { |
| 196 | if (!wxTheClipboard) return TRUE; |
| 197 | |
| 198 | if (event->selection == GDK_SELECTION_PRIMARY) |
| 199 | { |
| 200 | wxTheClipboard->m_ownsPrimarySelection = false; |
| 201 | } |
| 202 | else |
| 203 | if (event->selection == g_clipboardAtom) |
| 204 | { |
| 205 | wxTheClipboard->m_ownsClipboard = false; |
| 206 | } |
| 207 | else |
| 208 | { |
| 209 | wxTheClipboard->m_waiting = false; |
| 210 | return FALSE; |
| 211 | } |
| 212 | |
| 213 | if ((!wxTheClipboard->m_ownsPrimarySelection) && |
| 214 | (!wxTheClipboard->m_ownsClipboard)) |
| 215 | { |
| 216 | /* the clipboard is no longer in our hands. we can the delete clipboard data. */ |
| 217 | if (wxTheClipboard->m_data) |
| 218 | { |
| 219 | wxLogTrace(TRACE_CLIPBOARD, wxT("wxClipboard will get cleared" )); |
| 220 | |
| 221 | delete wxTheClipboard->m_data; |
| 222 | wxTheClipboard->m_data = (wxDataObject*) NULL; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | wxTheClipboard->m_waiting = false; |
| 227 | return TRUE; |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | //----------------------------------------------------------------------------- |
| 232 | // selection handler for supplying data |
| 233 | //----------------------------------------------------------------------------- |
| 234 | |
| 235 | extern "C" { |
| 236 | static void |
| 237 | selection_handler( GtkWidget *WXUNUSED(widget), |
| 238 | GtkSelectionData *selection_data, |
| 239 | guint WXUNUSED(info), |
| 240 | guint WXUNUSED(time), |
| 241 | gpointer signal_data ) |
| 242 | { |
| 243 | if (!wxTheClipboard) return; |
| 244 | |
| 245 | if (!wxTheClipboard->m_data) return; |
| 246 | |
| 247 | wxDataObject *data = wxTheClipboard->m_data; |
| 248 | |
| 249 | // ICCCM says that TIMESTAMP is a required atom. |
| 250 | // In particular, it satisfies Klipper, which polls |
| 251 | // TIMESTAMP to see if the clipboards content has changed. |
| 252 | // It shall return the time which was used to set the data. |
| 253 | if (selection_data->target == g_timestampAtom) |
| 254 | { |
| 255 | guint timestamp = GPOINTER_TO_UINT (signal_data); |
| 256 | gtk_selection_data_set(selection_data, |
| 257 | GDK_SELECTION_TYPE_INTEGER, |
| 258 | 32, |
| 259 | (guchar*)&(timestamp), |
| 260 | sizeof(timestamp)); |
| 261 | wxLogTrace(TRACE_CLIPBOARD, |
| 262 | _T("Clipboard TIMESTAMP requested, returning timestamp=%u"), |
| 263 | timestamp); |
| 264 | return; |
| 265 | } |
| 266 | |
| 267 | wxDataFormat format( selection_data->target ); |
| 268 | |
| 269 | #ifdef __WXDEBUG__ |
| 270 | wxLogTrace(TRACE_CLIPBOARD, |
| 271 | _T("clipboard data in format %s, GtkSelectionData is target=%s type=%s selection=%s timestamp=%u"), |
| 272 | format.GetId().c_str(), |
| 273 | wxString::FromAscii(gdk_atom_name(selection_data->target)).c_str(), |
| 274 | wxString::FromAscii(gdk_atom_name(selection_data->type)).c_str(), |
| 275 | wxString::FromAscii(gdk_atom_name(selection_data->selection)).c_str(), |
| 276 | GPOINTER_TO_UINT( signal_data ) |
| 277 | ); |
| 278 | #endif |
| 279 | |
| 280 | if (!data->IsSupportedFormat( format )) return; |
| 281 | |
| 282 | int size = data->GetDataSize( format ); |
| 283 | |
| 284 | if (size == 0) return; |
| 285 | |
| 286 | void *d = malloc(size); |
| 287 | |
| 288 | // Text data will be in UTF8 in Unicode mode. |
| 289 | data->GetDataHere( selection_data->target, d ); |
| 290 | |
| 291 | gtk_selection_data_set( |
| 292 | selection_data, |
| 293 | GDK_SELECTION_TYPE_STRING, |
| 294 | 8 * sizeof(gchar), |
| 295 | (unsigned char*) d, |
| 296 | size ); |
| 297 | |
| 298 | free(d); |
| 299 | } |
| 300 | } |
| 301 | |
| 302 | //----------------------------------------------------------------------------- |
| 303 | // wxClipboard |
| 304 | //----------------------------------------------------------------------------- |
| 305 | |
| 306 | IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject) |
| 307 | |
| 308 | wxClipboard::wxClipboard() |
| 309 | { |
| 310 | m_open = false; |
| 311 | m_waiting = false; |
| 312 | |
| 313 | m_ownsClipboard = false; |
| 314 | m_ownsPrimarySelection = false; |
| 315 | |
| 316 | m_data = (wxDataObject*) NULL; |
| 317 | m_receivedData = (wxDataObject*) NULL; |
| 318 | |
| 319 | /* we use m_targetsWidget to query what formats are available */ |
| 320 | |
| 321 | m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP ); |
| 322 | gtk_widget_realize( m_targetsWidget ); |
| 323 | |
| 324 | gtk_signal_connect( GTK_OBJECT(m_targetsWidget), |
| 325 | "selection_received", |
| 326 | GTK_SIGNAL_FUNC( targets_selection_received ), |
| 327 | (gpointer) this ); |
| 328 | |
| 329 | /* we use m_clipboardWidget to get and to offer data */ |
| 330 | |
| 331 | m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP ); |
| 332 | gtk_widget_realize( m_clipboardWidget ); |
| 333 | |
| 334 | gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), |
| 335 | "selection_received", |
| 336 | GTK_SIGNAL_FUNC( selection_received ), |
| 337 | (gpointer) this ); |
| 338 | |
| 339 | gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), |
| 340 | "selection_clear_event", |
| 341 | GTK_SIGNAL_FUNC( selection_clear_clip ), |
| 342 | (gpointer) NULL ); |
| 343 | |
| 344 | if (!g_clipboardAtom) g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE ); |
| 345 | if (!g_targetsAtom) g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE); |
| 346 | if (!g_timestampAtom) g_timestampAtom = gdk_atom_intern ("TIMESTAMP", FALSE); |
| 347 | |
| 348 | m_formatSupported = false; |
| 349 | m_targetRequested = 0; |
| 350 | |
| 351 | m_usePrimary = false; |
| 352 | } |
| 353 | |
| 354 | wxClipboard::~wxClipboard() |
| 355 | { |
| 356 | Clear(); |
| 357 | |
| 358 | if (m_clipboardWidget) gtk_widget_destroy( m_clipboardWidget ); |
| 359 | if (m_targetsWidget) gtk_widget_destroy( m_targetsWidget ); |
| 360 | } |
| 361 | |
| 362 | void wxClipboard::Clear() |
| 363 | { |
| 364 | if (m_data) |
| 365 | { |
| 366 | #if wxUSE_THREADS |
| 367 | /* disable GUI threads */ |
| 368 | #endif |
| 369 | |
| 370 | // As we have data we also own the clipboard. Once we no longer own |
| 371 | // it, clear_selection is called which will set m_data to zero |
| 372 | if (gdk_selection_owner_get( g_clipboardAtom ) == m_clipboardWidget->window) |
| 373 | { |
| 374 | m_waiting = true; |
| 375 | |
| 376 | gtk_selection_owner_set( (GtkWidget*) NULL, g_clipboardAtom, |
| 377 | (guint32) GDK_CURRENT_TIME ); |
| 378 | |
| 379 | while (m_waiting) gtk_main_iteration(); |
| 380 | } |
| 381 | |
| 382 | if (gdk_selection_owner_get( GDK_SELECTION_PRIMARY ) == m_clipboardWidget->window) |
| 383 | { |
| 384 | m_waiting = true; |
| 385 | |
| 386 | gtk_selection_owner_set( (GtkWidget*) NULL, GDK_SELECTION_PRIMARY, |
| 387 | (guint32) GDK_CURRENT_TIME ); |
| 388 | |
| 389 | while (m_waiting) gtk_main_iteration(); |
| 390 | } |
| 391 | |
| 392 | if (m_data) |
| 393 | { |
| 394 | delete m_data; |
| 395 | m_data = (wxDataObject*) NULL; |
| 396 | } |
| 397 | |
| 398 | #if wxUSE_THREADS |
| 399 | /* re-enable GUI threads */ |
| 400 | #endif |
| 401 | } |
| 402 | |
| 403 | m_targetRequested = 0; |
| 404 | m_formatSupported = false; |
| 405 | } |
| 406 | |
| 407 | bool wxClipboard::Open() |
| 408 | { |
| 409 | wxCHECK_MSG( !m_open, false, wxT("clipboard already open") ); |
| 410 | |
| 411 | m_open = true; |
| 412 | |
| 413 | return true; |
| 414 | } |
| 415 | |
| 416 | bool wxClipboard::SetData( wxDataObject *data ) |
| 417 | { |
| 418 | wxCHECK_MSG( m_open, false, wxT("clipboard not open") ); |
| 419 | |
| 420 | wxCHECK_MSG( data, false, wxT("data is invalid") ); |
| 421 | |
| 422 | Clear(); |
| 423 | |
| 424 | return AddData( data ); |
| 425 | } |
| 426 | |
| 427 | bool wxClipboard::AddData( wxDataObject *data ) |
| 428 | { |
| 429 | wxCHECK_MSG( m_open, false, wxT("clipboard not open") ); |
| 430 | |
| 431 | wxCHECK_MSG( data, false, wxT("data is invalid") ); |
| 432 | |
| 433 | // we can only store one wxDataObject |
| 434 | Clear(); |
| 435 | |
| 436 | m_data = data; |
| 437 | |
| 438 | // get formats from wxDataObjects |
| 439 | wxDataFormat *array = new wxDataFormat[ m_data->GetFormatCount() ]; |
| 440 | m_data->GetAllFormats( array ); |
| 441 | |
| 442 | // primary selection or clipboard |
| 443 | GdkAtom clipboard = m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY |
| 444 | : g_clipboardAtom; |
| 445 | |
| 446 | // by default provide TIMESTAMP as a target |
| 447 | gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget), |
| 448 | clipboard, |
| 449 | g_timestampAtom, |
| 450 | 0 ); |
| 451 | |
| 452 | for (size_t i = 0; i < m_data->GetFormatCount(); i++) |
| 453 | { |
| 454 | wxLogTrace( TRACE_CLIPBOARD, |
| 455 | wxT("wxClipboard now supports atom %s"), |
| 456 | array[i].GetId().c_str() ); |
| 457 | |
| 458 | // printf( "added %s\n", |
| 459 | // gdk_atom_name( array[i].GetFormatId() ) ); |
| 460 | |
| 461 | gtk_selection_add_target( GTK_WIDGET(m_clipboardWidget), |
| 462 | clipboard, |
| 463 | array[i], |
| 464 | 0 ); /* what is info ? */ |
| 465 | } |
| 466 | |
| 467 | delete[] array; |
| 468 | |
| 469 | gtk_signal_connect( GTK_OBJECT(m_clipboardWidget), |
| 470 | "selection_get", |
| 471 | GTK_SIGNAL_FUNC(selection_handler), |
| 472 | GUINT_TO_POINTER( gdk_event_get_time(gtk_get_current_event()) ) ); |
| 473 | |
| 474 | #if wxUSE_THREADS |
| 475 | /* disable GUI threads */ |
| 476 | #endif |
| 477 | |
| 478 | /* Tell the world we offer clipboard data */ |
| 479 | bool res = (gtk_selection_owner_set( m_clipboardWidget, |
| 480 | clipboard, |
| 481 | (guint32) GDK_CURRENT_TIME )); |
| 482 | |
| 483 | if (m_usePrimary) |
| 484 | m_ownsPrimarySelection = res; |
| 485 | else |
| 486 | m_ownsClipboard = res; |
| 487 | |
| 488 | #if wxUSE_THREADS |
| 489 | /* re-enable GUI threads */ |
| 490 | #endif |
| 491 | |
| 492 | return res; |
| 493 | } |
| 494 | |
| 495 | void wxClipboard::Close() |
| 496 | { |
| 497 | wxCHECK_RET( m_open, wxT("clipboard not open") ); |
| 498 | |
| 499 | m_open = false; |
| 500 | } |
| 501 | |
| 502 | bool wxClipboard::IsOpened() const |
| 503 | { |
| 504 | return m_open; |
| 505 | } |
| 506 | |
| 507 | bool wxClipboard::IsSupported( const wxDataFormat& format ) |
| 508 | { |
| 509 | /* reentrance problems */ |
| 510 | if (m_waiting) return false; |
| 511 | |
| 512 | /* store requested format to be asked for by callbacks */ |
| 513 | m_targetRequested = format; |
| 514 | |
| 515 | wxLogTrace( TRACE_CLIPBOARD, |
| 516 | wxT("wxClipboard:IsSupported: requested format: %s"), |
| 517 | format.GetId().c_str() ); |
| 518 | |
| 519 | wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") ); |
| 520 | |
| 521 | m_formatSupported = false; |
| 522 | |
| 523 | /* perform query. this will set m_formatSupported to |
| 524 | true if m_targetRequested is supported. |
| 525 | also, we have to wait for the "answer" from the |
| 526 | clipboard owner which is an asynchronous process. |
| 527 | therefore we set m_waiting = true here and wait |
| 528 | until the callback "targets_selection_received" |
| 529 | sets it to false */ |
| 530 | |
| 531 | m_waiting = true; |
| 532 | |
| 533 | gtk_selection_convert( m_targetsWidget, |
| 534 | m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY |
| 535 | : g_clipboardAtom, |
| 536 | g_targetsAtom, |
| 537 | (guint32) GDK_CURRENT_TIME ); |
| 538 | |
| 539 | while (m_waiting) gtk_main_iteration(); |
| 540 | |
| 541 | return m_formatSupported; |
| 542 | } |
| 543 | |
| 544 | bool wxClipboard::GetData( wxDataObject& data ) |
| 545 | { |
| 546 | wxCHECK_MSG( m_open, false, wxT("clipboard not open") ); |
| 547 | |
| 548 | /* get formats from wxDataObjects */ |
| 549 | wxDataFormat *array = new wxDataFormat[ data.GetFormatCount() ]; |
| 550 | data.GetAllFormats( array ); |
| 551 | |
| 552 | for (size_t i = 0; i < data.GetFormatCount(); i++) |
| 553 | { |
| 554 | wxDataFormat format( array[i] ); |
| 555 | |
| 556 | wxLogTrace( TRACE_CLIPBOARD, |
| 557 | wxT("wxClipboard::GetData: requested format: %s"), |
| 558 | format.GetId().c_str() ); |
| 559 | |
| 560 | /* is data supported by clipboard ? */ |
| 561 | |
| 562 | /* store requested format to be asked for by callbacks */ |
| 563 | m_targetRequested = format; |
| 564 | |
| 565 | wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") ); |
| 566 | |
| 567 | m_formatSupported = false; |
| 568 | |
| 569 | /* perform query. this will set m_formatSupported to |
| 570 | true if m_targetRequested is supported. |
| 571 | also, we have to wait for the "answer" from the |
| 572 | clipboard owner which is an asynchronous process. |
| 573 | therefore we set m_waiting = true here and wait |
| 574 | until the callback "targets_selection_received" |
| 575 | sets it to false */ |
| 576 | |
| 577 | m_waiting = true; |
| 578 | |
| 579 | gtk_selection_convert( m_targetsWidget, |
| 580 | m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY |
| 581 | : g_clipboardAtom, |
| 582 | g_targetsAtom, |
| 583 | (guint32) GDK_CURRENT_TIME ); |
| 584 | |
| 585 | while (m_waiting) gtk_main_iteration(); |
| 586 | |
| 587 | if (!m_formatSupported) continue; |
| 588 | |
| 589 | /* store pointer to data object to be filled up by callbacks */ |
| 590 | m_receivedData = &data; |
| 591 | |
| 592 | /* store requested format to be asked for by callbacks */ |
| 593 | m_targetRequested = format; |
| 594 | |
| 595 | wxCHECK_MSG( m_targetRequested, false, wxT("invalid clipboard format") ); |
| 596 | |
| 597 | /* start query */ |
| 598 | m_formatSupported = false; |
| 599 | |
| 600 | /* ask for clipboard contents. this will set |
| 601 | m_formatSupported to true if m_targetRequested |
| 602 | is supported. |
| 603 | also, we have to wait for the "answer" from the |
| 604 | clipboard owner which is an asynchronous process. |
| 605 | therefore we set m_waiting = true here and wait |
| 606 | until the callback "targets_selection_received" |
| 607 | sets it to false */ |
| 608 | |
| 609 | m_waiting = true; |
| 610 | |
| 611 | wxLogTrace( TRACE_CLIPBOARD, |
| 612 | wxT("wxClipboard::GetData: format found, start convert") ); |
| 613 | |
| 614 | gtk_selection_convert( m_clipboardWidget, |
| 615 | m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY |
| 616 | : g_clipboardAtom, |
| 617 | m_targetRequested, |
| 618 | (guint32) GDK_CURRENT_TIME ); |
| 619 | |
| 620 | while (m_waiting) gtk_main_iteration(); |
| 621 | |
| 622 | /* this is a true error as we checked for the presence of such data before */ |
| 623 | wxCHECK_MSG( m_formatSupported, false, wxT("error retrieving data from clipboard") ); |
| 624 | |
| 625 | /* return success */ |
| 626 | delete[] array; |
| 627 | return true; |
| 628 | } |
| 629 | |
| 630 | wxLogTrace( TRACE_CLIPBOARD, |
| 631 | wxT("wxClipboard::GetData: format not found") ); |
| 632 | |
| 633 | /* return failure */ |
| 634 | delete[] array; |
| 635 | return false; |
| 636 | } |
| 637 | |
| 638 | #endif |
| 639 | // wxUSE_CLIPBOARD |