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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/gtk/clipbrd.cpp | |
3 | // Purpose: wxClipboard implementation for wxGTK | |
4 | // Author: Robert Roebling, Vadim Zeitlin | |
5 | // Id: $Id$ | |
6 | // Copyright: (c) 1998 Robert Roebling | |
7 | // (c) 2007 Vadim Zeitlin | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | // ============================================================================ | |
12 | // declarations | |
13 | // ============================================================================ | |
14 | ||
15 | // ---------------------------------------------------------------------------- | |
16 | // headers | |
17 | // ---------------------------------------------------------------------------- | |
18 | ||
19 | // For compilers that support precompilation, includes "wx.h". | |
20 | #include "wx/wxprec.h" | |
21 | ||
22 | #if wxUSE_CLIPBOARD | |
23 | ||
24 | #include "wx/clipbrd.h" | |
25 | ||
26 | #ifndef WX_PRECOMP | |
27 | #include "wx/app.h" | |
28 | #include "wx/log.h" | |
29 | #include "wx/utils.h" | |
30 | #include "wx/dataobj.h" | |
31 | #endif | |
32 | ||
33 | #include "wx/scopedarray.h" | |
34 | #include "wx/scopeguard.h" | |
35 | #include "wx/evtloop.h" | |
36 | ||
37 | #include "wx/gtk/private.h" | |
38 | ||
39 | typedef wxScopedArray<wxDataFormat> wxDataFormatArray; | |
40 | ||
41 | // ---------------------------------------------------------------------------- | |
42 | // data | |
43 | // ---------------------------------------------------------------------------- | |
44 | ||
45 | static GdkAtom g_clipboardAtom = 0; | |
46 | static GdkAtom g_targetsAtom = 0; | |
47 | static GdkAtom g_timestampAtom = 0; | |
48 | ||
49 | #if wxUSE_UNICODE | |
50 | extern GdkAtom g_altTextAtom; | |
51 | #endif | |
52 | ||
53 | // the trace mask we use with wxLogTrace() - call | |
54 | // wxLog::AddTraceMask(TRACE_CLIPBOARD) to enable the trace messages from here | |
55 | // (there will be a *lot* of them!) | |
56 | #define TRACE_CLIPBOARD wxT("clipboard") | |
57 | ||
58 | // ---------------------------------------------------------------------------- | |
59 | // wxClipboardSync: used to perform clipboard operations synchronously | |
60 | // ---------------------------------------------------------------------------- | |
61 | ||
62 | // constructing this object on stack will wait wait until the latest clipboard | |
63 | // operation is finished on block exit | |
64 | // | |
65 | // notice that there can be no more than one such object alive at any moment, | |
66 | // i.e. reentrancies are not allowed | |
67 | class wxClipboardSync | |
68 | { | |
69 | public: | |
70 | wxClipboardSync(wxClipboard& clipboard) | |
71 | { | |
72 | wxASSERT_MSG( !ms_clipboard, wxT("reentrancy in clipboard code") ); | |
73 | ms_clipboard = &clipboard; | |
74 | } | |
75 | ||
76 | ~wxClipboardSync() | |
77 | { | |
78 | // ensure that there is a running event loop: this might not be the | |
79 | // case if we're called before the main event loop startup | |
80 | wxEventLoopGuarantor ensureEventLoop; | |
81 | ||
82 | while (ms_clipboard) | |
83 | wxEventLoopBase::GetActive()->YieldFor(wxEVT_CATEGORY_CLIPBOARD); | |
84 | } | |
85 | ||
86 | // this method must be called by GTK+ callbacks to indicate that we got the | |
87 | // result for our clipboard operation | |
88 | static void OnDone(wxClipboard * WXUNUSED_UNLESS_DEBUG(clipboard)) | |
89 | { | |
90 | wxASSERT_MSG( clipboard == ms_clipboard, | |
91 | wxT("got notification for alien clipboard") ); | |
92 | ||
93 | ms_clipboard = NULL; | |
94 | } | |
95 | ||
96 | // this method should be called if it's possible that no async clipboard | |
97 | // operation is currently in progress (like it can be the case when the | |
98 | // clipboard is cleared but not because we asked about it), it should only | |
99 | // be called if such situation is expected -- otherwise call OnDone() which | |
100 | // would assert in this case | |
101 | static void OnDoneIfInProgress(wxClipboard *clipboard) | |
102 | { | |
103 | if ( ms_clipboard ) | |
104 | OnDone(clipboard); | |
105 | } | |
106 | ||
107 | private: | |
108 | static wxClipboard *ms_clipboard; | |
109 | ||
110 | wxDECLARE_NO_COPY_CLASS(wxClipboardSync); | |
111 | }; | |
112 | ||
113 | wxClipboard *wxClipboardSync::ms_clipboard = NULL; | |
114 | ||
115 | // ============================================================================ | |
116 | // clipboard callbacks implementation | |
117 | // ============================================================================ | |
118 | ||
119 | //----------------------------------------------------------------------------- | |
120 | // "selection_received" for targets | |
121 | //----------------------------------------------------------------------------- | |
122 | ||
123 | extern "C" { | |
124 | static void | |
125 | targets_selection_received( GtkWidget *WXUNUSED(widget), | |
126 | GtkSelectionData *selection_data, | |
127 | guint32 WXUNUSED(time), | |
128 | wxClipboard *clipboard ) | |
129 | { | |
130 | if ( !clipboard ) | |
131 | return; | |
132 | ||
133 | wxON_BLOCK_EXIT1(wxClipboardSync::OnDone, clipboard); | |
134 | ||
135 | if ( !selection_data || selection_data->length <= 0 ) | |
136 | return; | |
137 | ||
138 | // make sure we got the data in the correct form | |
139 | GdkAtom type = selection_data->type; | |
140 | if ( type != GDK_SELECTION_TYPE_ATOM ) | |
141 | { | |
142 | if ( strcmp(wxGtkString(gdk_atom_name(type)), "TARGETS") != 0 ) | |
143 | { | |
144 | wxLogTrace( TRACE_CLIPBOARD, | |
145 | wxT("got unsupported clipboard target") ); | |
146 | ||
147 | return; | |
148 | } | |
149 | } | |
150 | ||
151 | // it's not really a format, of course, but we can reuse its GetId() method | |
152 | // to format this atom as string | |
153 | wxDataFormat clip(selection_data->selection); | |
154 | wxLogTrace( TRACE_CLIPBOARD, | |
155 | wxT("Received available formats for clipboard %s"), | |
156 | clip.GetId().c_str() ); | |
157 | ||
158 | // the atoms we received, holding a list of targets (= formats) | |
159 | const GdkAtom * const atoms = (GdkAtom *)selection_data->data; | |
160 | for ( size_t i = 0; i < selection_data->length/sizeof(GdkAtom); i++ ) | |
161 | { | |
162 | const wxDataFormat format(atoms[i]); | |
163 | ||
164 | wxLogTrace(TRACE_CLIPBOARD, wxT("\t%s"), format.GetId().c_str()); | |
165 | ||
166 | if ( clipboard->GTKOnTargetReceived(format) ) | |
167 | return; | |
168 | } | |
169 | } | |
170 | } | |
171 | ||
172 | bool wxClipboard::GTKOnTargetReceived(const wxDataFormat& format) | |
173 | { | |
174 | if ( format != m_targetRequested ) | |
175 | return false; | |
176 | ||
177 | m_formatSupported = true; | |
178 | return true; | |
179 | } | |
180 | ||
181 | //----------------------------------------------------------------------------- | |
182 | // "selection_received" for the actual data | |
183 | //----------------------------------------------------------------------------- | |
184 | ||
185 | extern "C" { | |
186 | static void | |
187 | selection_received( GtkWidget *WXUNUSED(widget), | |
188 | GtkSelectionData *selection_data, | |
189 | guint32 WXUNUSED(time), | |
190 | wxClipboard *clipboard ) | |
191 | { | |
192 | if ( !clipboard ) | |
193 | return; | |
194 | ||
195 | wxON_BLOCK_EXIT1(wxClipboardSync::OnDone, clipboard); | |
196 | ||
197 | if ( !selection_data || selection_data->length <= 0 ) | |
198 | return; | |
199 | ||
200 | clipboard->GTKOnSelectionReceived(*selection_data); | |
201 | } | |
202 | } | |
203 | ||
204 | //----------------------------------------------------------------------------- | |
205 | // "selection_clear" | |
206 | //----------------------------------------------------------------------------- | |
207 | ||
208 | extern "C" { | |
209 | static gint | |
210 | selection_clear_clip( GtkWidget *WXUNUSED(widget), GdkEventSelection *event ) | |
211 | { | |
212 | wxClipboard * const clipboard = wxTheClipboard; | |
213 | if ( !clipboard ) | |
214 | return TRUE; | |
215 | ||
216 | // notice the use of OnDoneIfInProgress() here instead of just OnDone(): | |
217 | // it's perfectly possible that we're receiving this notification from GTK+ | |
218 | // even though we hadn't cleared the clipboard ourselves but because | |
219 | // another application (or even another window in the same program) | |
220 | // acquired it | |
221 | wxON_BLOCK_EXIT1(wxClipboardSync::OnDoneIfInProgress, clipboard); | |
222 | ||
223 | wxClipboard::Kind kind; | |
224 | if (event->selection == GDK_SELECTION_PRIMARY) | |
225 | { | |
226 | wxLogTrace(TRACE_CLIPBOARD, wxT("Lost primary selection" )); | |
227 | ||
228 | kind = wxClipboard::Primary; | |
229 | } | |
230 | else if (event->selection == g_clipboardAtom) | |
231 | { | |
232 | wxLogTrace(TRACE_CLIPBOARD, wxT("Lost clipboard" )); | |
233 | ||
234 | kind = wxClipboard::Clipboard; | |
235 | } | |
236 | else // some other selection, we're not concerned | |
237 | { | |
238 | return FALSE; | |
239 | } | |
240 | ||
241 | // the clipboard is no longer in our hands, we don't need data any more | |
242 | clipboard->GTKClearData(kind); | |
243 | ||
244 | return TRUE; | |
245 | } | |
246 | } | |
247 | ||
248 | //----------------------------------------------------------------------------- | |
249 | // selection handler for supplying data | |
250 | //----------------------------------------------------------------------------- | |
251 | ||
252 | extern "C" { | |
253 | static void | |
254 | selection_handler( GtkWidget *WXUNUSED(widget), | |
255 | GtkSelectionData *selection_data, | |
256 | guint WXUNUSED(info), | |
257 | guint WXUNUSED(time), | |
258 | gpointer signal_data ) | |
259 | { | |
260 | wxClipboard * const clipboard = wxTheClipboard; | |
261 | if ( !clipboard ) | |
262 | return; | |
263 | ||
264 | wxDataObject * const data = clipboard->GTKGetDataObject(); | |
265 | if ( !data ) | |
266 | return; | |
267 | ||
268 | // ICCCM says that TIMESTAMP is a required atom. | |
269 | // In particular, it satisfies Klipper, which polls | |
270 | // TIMESTAMP to see if the clipboards content has changed. | |
271 | // It shall return the time which was used to set the data. | |
272 | if (selection_data->target == g_timestampAtom) | |
273 | { | |
274 | guint timestamp = GPOINTER_TO_UINT (signal_data); | |
275 | gtk_selection_data_set(selection_data, | |
276 | GDK_SELECTION_TYPE_INTEGER, | |
277 | 32, | |
278 | (guchar*)&(timestamp), | |
279 | sizeof(timestamp)); | |
280 | wxLogTrace(TRACE_CLIPBOARD, | |
281 | wxT("Clipboard TIMESTAMP requested, returning timestamp=%u"), | |
282 | timestamp); | |
283 | return; | |
284 | } | |
285 | ||
286 | wxDataFormat format( selection_data->target ); | |
287 | ||
288 | wxLogTrace(TRACE_CLIPBOARD, | |
289 | wxT("clipboard data in format %s, GtkSelectionData is target=%s type=%s selection=%s timestamp=%u"), | |
290 | format.GetId().c_str(), | |
291 | wxString::FromAscii(wxGtkString(gdk_atom_name(selection_data->target))).c_str(), | |
292 | wxString::FromAscii(wxGtkString(gdk_atom_name(selection_data->type))).c_str(), | |
293 | wxString::FromAscii(wxGtkString(gdk_atom_name(selection_data->selection))).c_str(), | |
294 | GPOINTER_TO_UINT( signal_data ) | |
295 | ); | |
296 | ||
297 | if ( !data->IsSupportedFormat( format ) ) | |
298 | return; | |
299 | ||
300 | int size = data->GetDataSize( format ); | |
301 | if ( !size ) | |
302 | return; | |
303 | ||
304 | wxCharBuffer buf(size - 1); // it adds 1 internally (for NUL) | |
305 | ||
306 | // text data must be returned in UTF8 if format is wxDF_UNICODETEXT | |
307 | if ( !data->GetDataHere(format, buf.data()) ) | |
308 | return; | |
309 | ||
310 | // use UTF8_STRING format if requested in Unicode build but just plain | |
311 | // STRING one in ANSI or if explicitly asked in Unicode | |
312 | #if wxUSE_UNICODE | |
313 | if (format == wxDataFormat(wxDF_UNICODETEXT)) | |
314 | { | |
315 | gtk_selection_data_set_text( | |
316 | selection_data, | |
317 | (const gchar*)buf.data(), | |
318 | size ); | |
319 | } | |
320 | else | |
321 | #endif // wxUSE_UNICODE | |
322 | { | |
323 | gtk_selection_data_set( | |
324 | selection_data, | |
325 | GDK_SELECTION_TYPE_STRING, | |
326 | 8*sizeof(gchar), | |
327 | (const guchar*)buf.data(), | |
328 | size ); | |
329 | } | |
330 | } | |
331 | } | |
332 | ||
333 | void wxClipboard::GTKOnSelectionReceived(const GtkSelectionData& sel) | |
334 | { | |
335 | wxCHECK_RET( m_receivedData, wxT("should be inside GetData()") ); | |
336 | ||
337 | const wxDataFormat format(sel.target); | |
338 | wxLogTrace(TRACE_CLIPBOARD, wxT("Received selection %s"), | |
339 | format.GetId().c_str()); | |
340 | ||
341 | if ( !m_receivedData->IsSupportedFormat(format) ) | |
342 | return; | |
343 | ||
344 | m_receivedData->SetData(format, sel.length, sel.data); | |
345 | m_formatSupported = true; | |
346 | } | |
347 | ||
348 | //----------------------------------------------------------------------------- | |
349 | // asynchronous "selection_received" for targets | |
350 | //----------------------------------------------------------------------------- | |
351 | ||
352 | extern "C" { | |
353 | static void | |
354 | async_targets_selection_received( GtkWidget *WXUNUSED(widget), | |
355 | GtkSelectionData *selection_data, | |
356 | guint32 WXUNUSED(time), | |
357 | wxClipboard *clipboard ) | |
358 | { | |
359 | if ( !clipboard ) // Assert? | |
360 | return; | |
361 | ||
362 | if (!clipboard->m_sink) | |
363 | return; | |
364 | ||
365 | wxClipboardEvent *event = new wxClipboardEvent(wxEVT_CLIPBOARD_CHANGED); | |
366 | event->SetEventObject( clipboard ); | |
367 | ||
368 | if ( !selection_data || selection_data->length <= 0 ) | |
369 | { | |
370 | clipboard->m_sink->QueueEvent( event ); | |
371 | clipboard->m_sink.Release(); | |
372 | return; | |
373 | } | |
374 | ||
375 | // make sure we got the data in the correct form | |
376 | GdkAtom type = selection_data->type; | |
377 | if ( type != GDK_SELECTION_TYPE_ATOM ) | |
378 | { | |
379 | if ( strcmp(wxGtkString(gdk_atom_name(type)), "TARGETS") != 0 ) | |
380 | { | |
381 | wxLogTrace( TRACE_CLIPBOARD, | |
382 | wxT("got unsupported clipboard target") ); | |
383 | ||
384 | clipboard->m_sink->QueueEvent( event ); | |
385 | clipboard->m_sink.Release(); | |
386 | return; | |
387 | } | |
388 | } | |
389 | ||
390 | // it's not really a format, of course, but we can reuse its GetId() method | |
391 | // to format this atom as string | |
392 | wxDataFormat clip(selection_data->selection); | |
393 | wxLogTrace( TRACE_CLIPBOARD, | |
394 | wxT("Received available formats for clipboard %s"), | |
395 | clip.GetId().c_str() ); | |
396 | ||
397 | // the atoms we received, holding a list of targets (= formats) | |
398 | const GdkAtom * const atoms = (GdkAtom *)selection_data->data; | |
399 | for ( size_t i = 0; i < selection_data->length/sizeof(GdkAtom); i++ ) | |
400 | { | |
401 | const wxDataFormat format(atoms[i]); | |
402 | ||
403 | wxLogTrace(TRACE_CLIPBOARD, wxT("\t%s"), format.GetId().c_str()); | |
404 | ||
405 | event->AddFormat( format ); | |
406 | } | |
407 | ||
408 | clipboard->m_sink->QueueEvent( event ); | |
409 | clipboard->m_sink.Release(); | |
410 | } | |
411 | } | |
412 | ||
413 | // ============================================================================ | |
414 | // wxClipboard implementation | |
415 | // ============================================================================ | |
416 | ||
417 | // ---------------------------------------------------------------------------- | |
418 | // wxClipboard ctor/dtor | |
419 | // ---------------------------------------------------------------------------- | |
420 | ||
421 | IMPLEMENT_DYNAMIC_CLASS(wxClipboard,wxObject) | |
422 | ||
423 | wxClipboard::wxClipboard() | |
424 | { | |
425 | m_open = false; | |
426 | ||
427 | m_dataPrimary = | |
428 | m_dataClipboard = | |
429 | m_receivedData = NULL; | |
430 | ||
431 | m_formatSupported = false; | |
432 | m_targetRequested = 0; | |
433 | ||
434 | // we use m_targetsWidget to query what formats are available | |
435 | m_targetsWidget = gtk_window_new( GTK_WINDOW_POPUP ); | |
436 | gtk_widget_realize( m_targetsWidget ); | |
437 | ||
438 | g_signal_connect (m_targetsWidget, "selection_received", | |
439 | G_CALLBACK (targets_selection_received), this); | |
440 | ||
441 | // we use m_targetsWidgetAsync to query what formats are available asynchronously | |
442 | m_targetsWidgetAsync = gtk_window_new( GTK_WINDOW_POPUP ); | |
443 | gtk_widget_realize( m_targetsWidgetAsync ); | |
444 | ||
445 | g_signal_connect (m_targetsWidgetAsync, "selection_received", | |
446 | G_CALLBACK (async_targets_selection_received), this); | |
447 | ||
448 | // we use m_clipboardWidget to get and to offer data | |
449 | m_clipboardWidget = gtk_window_new( GTK_WINDOW_POPUP ); | |
450 | gtk_widget_realize( m_clipboardWidget ); | |
451 | ||
452 | g_signal_connect (m_clipboardWidget, "selection_received", | |
453 | G_CALLBACK (selection_received), this); | |
454 | ||
455 | g_signal_connect (m_clipboardWidget, "selection_clear_event", | |
456 | G_CALLBACK (selection_clear_clip), NULL); | |
457 | ||
458 | // initialize atoms we use if not done yet | |
459 | if ( !g_clipboardAtom ) | |
460 | g_clipboardAtom = gdk_atom_intern( "CLIPBOARD", FALSE ); | |
461 | if ( !g_targetsAtom ) | |
462 | g_targetsAtom = gdk_atom_intern ("TARGETS", FALSE); | |
463 | if ( !g_timestampAtom ) | |
464 | g_timestampAtom = gdk_atom_intern ("TIMESTAMP", FALSE); | |
465 | } | |
466 | ||
467 | wxClipboard::~wxClipboard() | |
468 | { | |
469 | Clear(); | |
470 | ||
471 | gtk_widget_destroy( m_clipboardWidget ); | |
472 | gtk_widget_destroy( m_targetsWidget ); | |
473 | } | |
474 | ||
475 | // ---------------------------------------------------------------------------- | |
476 | // wxClipboard helper functions | |
477 | // ---------------------------------------------------------------------------- | |
478 | ||
479 | GdkAtom wxClipboard::GTKGetClipboardAtom() const | |
480 | { | |
481 | return m_usePrimary ? (GdkAtom)GDK_SELECTION_PRIMARY | |
482 | : g_clipboardAtom; | |
483 | } | |
484 | ||
485 | void wxClipboard::GTKClearData(Kind kind) | |
486 | { | |
487 | wxDataObject *&data = Data(kind); | |
488 | if ( data ) | |
489 | { | |
490 | delete data; | |
491 | data = NULL; | |
492 | } | |
493 | } | |
494 | ||
495 | bool wxClipboard::SetSelectionOwner(bool set) | |
496 | { | |
497 | bool rc = gtk_selection_owner_set | |
498 | ( | |
499 | set ? m_clipboardWidget : NULL, | |
500 | GTKGetClipboardAtom(), | |
501 | (guint32)GDK_CURRENT_TIME | |
502 | ); | |
503 | ||
504 | if ( !rc ) | |
505 | { | |
506 | wxLogTrace(TRACE_CLIPBOARD, wxT("Failed to %sset selection owner"), | |
507 | set ? wxT("") : wxT("un")); | |
508 | } | |
509 | ||
510 | return rc; | |
511 | } | |
512 | ||
513 | void wxClipboard::AddSupportedTarget(GdkAtom atom) | |
514 | { | |
515 | gtk_selection_add_target | |
516 | ( | |
517 | m_clipboardWidget, | |
518 | GTKGetClipboardAtom(), | |
519 | atom, | |
520 | 0 // info (same as client data) unused | |
521 | ); | |
522 | } | |
523 | ||
524 | bool wxClipboard::IsSupportedAsync(wxEvtHandler *sink) | |
525 | { | |
526 | if (m_sink.get()) | |
527 | return false; // currently busy, come back later | |
528 | ||
529 | wxCHECK_MSG( sink, false, wxT("no sink given") ); | |
530 | ||
531 | m_sink = sink; | |
532 | gtk_selection_convert( m_targetsWidgetAsync, | |
533 | GTKGetClipboardAtom(), | |
534 | g_targetsAtom, | |
535 | (guint32) GDK_CURRENT_TIME ); | |
536 | ||
537 | return true; | |
538 | } | |
539 | ||
540 | bool wxClipboard::DoIsSupported(const wxDataFormat& format) | |
541 | { | |
542 | wxCHECK_MSG( format, false, wxT("invalid clipboard format") ); | |
543 | ||
544 | wxLogTrace(TRACE_CLIPBOARD, wxT("Checking if format %s is available"), | |
545 | format.GetId().c_str()); | |
546 | ||
547 | // these variables will be used by our GTKOnTargetReceived() | |
548 | m_targetRequested = format; | |
549 | m_formatSupported = false; | |
550 | ||
551 | // block until m_formatSupported is set from targets_selection_received | |
552 | // callback | |
553 | { | |
554 | wxClipboardSync sync(*this); | |
555 | ||
556 | gtk_selection_convert( m_targetsWidget, | |
557 | GTKGetClipboardAtom(), | |
558 | g_targetsAtom, | |
559 | (guint32) GDK_CURRENT_TIME ); | |
560 | } | |
561 | ||
562 | return m_formatSupported; | |
563 | } | |
564 | ||
565 | // ---------------------------------------------------------------------------- | |
566 | // wxClipboard public API implementation | |
567 | // ---------------------------------------------------------------------------- | |
568 | ||
569 | void wxClipboard::Clear() | |
570 | { | |
571 | gtk_selection_clear_targets( m_clipboardWidget, GTKGetClipboardAtom() ); | |
572 | ||
573 | if ( gdk_selection_owner_get(GTKGetClipboardAtom()) == | |
574 | m_clipboardWidget->window ) | |
575 | { | |
576 | wxClipboardSync sync(*this); | |
577 | ||
578 | // this will result in selection_clear_clip callback being called and | |
579 | // it will free our data | |
580 | SetSelectionOwner(false); | |
581 | } | |
582 | ||
583 | m_targetRequested = 0; | |
584 | m_formatSupported = false; | |
585 | } | |
586 | ||
587 | bool wxClipboard::Open() | |
588 | { | |
589 | wxCHECK_MSG( !m_open, false, wxT("clipboard already open") ); | |
590 | ||
591 | m_open = true; | |
592 | ||
593 | return true; | |
594 | } | |
595 | ||
596 | bool wxClipboard::SetData( wxDataObject *data ) | |
597 | { | |
598 | wxCHECK_MSG( m_open, false, wxT("clipboard not open") ); | |
599 | ||
600 | wxCHECK_MSG( data, false, wxT("data is invalid") ); | |
601 | ||
602 | Clear(); | |
603 | ||
604 | return AddData( data ); | |
605 | } | |
606 | ||
607 | bool wxClipboard::AddData( wxDataObject *data ) | |
608 | { | |
609 | wxCHECK_MSG( m_open, false, wxT("clipboard not open") ); | |
610 | ||
611 | wxCHECK_MSG( data, false, wxT("data is invalid") ); | |
612 | ||
613 | // we can only store one wxDataObject so clear the old one | |
614 | Clear(); | |
615 | ||
616 | Data() = data; | |
617 | ||
618 | // get formats from wxDataObjects | |
619 | const size_t count = data->GetFormatCount(); | |
620 | wxDataFormatArray formats(new wxDataFormat[count]); | |
621 | data->GetAllFormats(formats.get()); | |
622 | ||
623 | // always provide TIMESTAMP as a target, see comments in selection_handler | |
624 | // for explanation | |
625 | AddSupportedTarget(g_timestampAtom); | |
626 | ||
627 | for ( size_t i = 0; i < count; i++ ) | |
628 | { | |
629 | const wxDataFormat format(formats[i]); | |
630 | ||
631 | wxLogTrace(TRACE_CLIPBOARD, wxT("Adding support for %s"), | |
632 | format.GetId().c_str()); | |
633 | ||
634 | AddSupportedTarget(format); | |
635 | } | |
636 | ||
637 | g_signal_connect (m_clipboardWidget, "selection_get", | |
638 | G_CALLBACK (selection_handler), | |
639 | GUINT_TO_POINTER (gtk_get_current_event_time()) ); | |
640 | ||
641 | // tell the world we offer clipboard data | |
642 | return SetSelectionOwner(); | |
643 | } | |
644 | ||
645 | void wxClipboard::Close() | |
646 | { | |
647 | wxCHECK_RET( m_open, wxT("clipboard not open") ); | |
648 | ||
649 | m_open = false; | |
650 | } | |
651 | ||
652 | bool wxClipboard::IsOpened() const | |
653 | { | |
654 | return m_open; | |
655 | } | |
656 | ||
657 | bool wxClipboard::IsSupported( const wxDataFormat& format ) | |
658 | { | |
659 | if ( DoIsSupported(format) ) | |
660 | return true; | |
661 | ||
662 | #if wxUSE_UNICODE | |
663 | if ( format == wxDF_UNICODETEXT ) | |
664 | { | |
665 | // also with plain STRING format | |
666 | return DoIsSupported(g_altTextAtom); | |
667 | } | |
668 | #endif // wxUSE_UNICODE | |
669 | ||
670 | return false; | |
671 | } | |
672 | ||
673 | bool wxClipboard::GetData( wxDataObject& data ) | |
674 | { | |
675 | wxCHECK_MSG( m_open, false, wxT("clipboard not open") ); | |
676 | ||
677 | // get all supported formats from wxDataObjects: notice that we are setting | |
678 | // the object data, so we need them in "Set" direction | |
679 | const size_t count = data.GetFormatCount(wxDataObject::Set); | |
680 | wxDataFormatArray formats(new wxDataFormat[count]); | |
681 | data.GetAllFormats(formats.get(), wxDataObject::Set); | |
682 | ||
683 | for ( size_t i = 0; i < count; i++ ) | |
684 | { | |
685 | const wxDataFormat format(formats[i]); | |
686 | ||
687 | // is this format supported by clipboard ? | |
688 | if ( !DoIsSupported(format) ) | |
689 | continue; | |
690 | ||
691 | wxLogTrace(TRACE_CLIPBOARD, wxT("Requesting format %s"), | |
692 | format.GetId().c_str()); | |
693 | ||
694 | // these variables will be used by our GTKOnSelectionReceived() | |
695 | m_receivedData = &data; | |
696 | m_formatSupported = false; | |
697 | ||
698 | { | |
699 | wxClipboardSync sync(*this); | |
700 | ||
701 | gtk_selection_convert(m_clipboardWidget, | |
702 | GTKGetClipboardAtom(), | |
703 | format, | |
704 | (guint32) GDK_CURRENT_TIME ); | |
705 | } // wait until we get the results | |
706 | ||
707 | /* | |
708 | Normally this is a true error as we checked for the presence of such | |
709 | data before, but there are applications that may return an empty | |
710 | string (e.g. Gnumeric-1.6.1 on Linux if an empty cell is copied) | |
711 | which would produce a false error message here, so we check for the | |
712 | size of the string first. With ANSI, GetDataSize returns an extra | |
713 | value (for the closing null?), with unicode, the exact number of | |
714 | tokens is given (that is more than 1 for non-ASCII characters) | |
715 | (tested with Gnumeric-1.6.1 and OpenOffice.org-2.0.2) | |
716 | */ | |
717 | #if wxUSE_UNICODE | |
718 | if ( format != wxDF_UNICODETEXT || data.GetDataSize(format) > 0 ) | |
719 | #else // !UNICODE | |
720 | if ( format != wxDF_TEXT || data.GetDataSize(format) > 1 ) | |
721 | #endif // UNICODE / !UNICODE | |
722 | { | |
723 | wxCHECK_MSG( m_formatSupported, false, | |
724 | wxT("error retrieving data from clipboard") ); | |
725 | } | |
726 | ||
727 | return true; | |
728 | } | |
729 | ||
730 | wxLogTrace(TRACE_CLIPBOARD, wxT("GetData(): format not found")); | |
731 | ||
732 | return false; | |
733 | } | |
734 | ||
735 | #endif // wxUSE_CLIPBOARD |