xclip.c@ 85327

Last change on this file since 85327 was 55123, checked in by vboxsync, 10 years ago
rdesktop 1.8.3 modified for VBox
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1	/* -- c-basic-offset: 8 --
2	rdesktop: A Remote Desktop Protocol client.
3	Protocol services - Clipboard functions
4	Copyright 2003-2008 Erik Forsberg <[email protected]> for Cendio AB
5	Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 2003-2008
6	Copyright 2006-2011 Pierre Ossman <[email protected]> for Cendio AB
7
8	This program is free software: you can redistribute it and/or modify
9	it under the terms of the GNU General Public License as published by
10	the Free Software Foundation, either version 3 of the License, or
11	(at your option) any later version.
12
13	This program is distributed in the hope that it will be useful,
14	but WITHOUT ANY WARRANTY; without even the implied warranty of
15	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	GNU General Public License for more details.
17
18	You should have received a copy of the GNU General Public License
19	along with this program. If not, see <http://www.gnu.org/licenses/>.
20	*/
21
22	/*
23	* Oracle GPL Disclaimer: For the avoidance of doubt, except that if any license choice
24	* other than GPL or LGPL is available it will apply instead, Oracle elects to use only
25	* the General Public License version 2 (GPLv2) at this time for any software where
26	* a choice of GPL license versions is made available with the language indicating
27	* that GPLv2 or any later version may be used, or where a choice of which version
28	* of the GPL is applied is otherwise unspecified.
29	*/
30
31	#include <X11/Xlib.h>
32	#include <X11/Xatom.h>
33	#include "rdesktop.h"
34
35	/*
36	To gain better understanding of this code, one could be assisted by the following documents:
37	- Inter-Client Communication Conventions Manual (ICCCM)
38	HTML: http://tronche.com/gui/x/icccm/
39	PDF: http://ftp.xfree86.org/pub/XFree86/4.5.0/doc/PDF/icccm.pdf
40	- MSDN: Clipboard Formats
41	http://msdn.microsoft.com/library/en-us/winui/winui/windowsuserinterface/dataexchange/clipboard/clipboardformats.asp
42	*/
43
44	#ifdef HAVE_ICONV
45	#ifdef HAVE_LANGINFO_H
46	#ifdef HAVE_ICONV_H
47	#include <langinfo.h>
48
49	#if defined(RT_OS_SOLARIS) && !defined(_XPG6)
50	# define VBOX_XPG6_TMP_DEF
51	# define _XPG6
52	#endif
53	#if defined(RT_OS_SOLARIS) && defined(__USE_LEGACY_PROTOTYPES__)
54	# define VBOX_LEGACY_PROTO_TMP_DEF
55	# undef __USE_LEGACY_PROTOTYPES__
56	# endif
57	#include <iconv.h>
58	#if defined(VBOX_XPG6_TMP_DEF)
59	# undef _XPG6
60	# undef VBOX_XPG6_TMP_DEF
61	#endif
62	#if defined(VBOX_LEGACY_PROTO_TMP_DEF)
63	# define __USE_LEGACY_PROTOTYPES__
64	# undef VBOX_LEGACY_PROTO_TMP_DEF
65	#endif
66
67	#define USE_UNICODE_CLIPBOARD
68	#endif
69	#endif
70	#endif
71
72	#ifdef USE_UNICODE_CLIPBOARD
73	#define RDP_CF_TEXT CF_UNICODETEXT
74	#else
75	#define RDP_CF_TEXT CF_TEXT
76	#endif
77
78	#define MAX_TARGETS 8
79
80	extern Display *g_display;
81	extern Window g_wnd;
82	extern Time g_last_gesturetime;
83	extern RD_BOOL g_rdpclip;
84
85	/* Mode of operation.
86	- Auto: Look at both PRIMARY and CLIPBOARD and use the most recent.
87	- Non-auto: Look at just CLIPBOARD. */
88	static RD_BOOL auto_mode = True;
89	/* Atoms of the two X selections we're dealing with: CLIPBOARD (explicit-copy) and PRIMARY (selection-copy) */
90	static Atom clipboard_atom, primary_atom;
91	/* Atom of the TARGETS clipboard target */
92	static Atom targets_atom;
93	/* Atom of the TIMESTAMP clipboard target */
94	static Atom timestamp_atom;
95	/* Atom _RDESKTOP_CLIPBOARD_TARGET which is used as the 'property' argument in
96	XConvertSelection calls: This is the property of our window into which
97	XConvertSelection will store the received clipboard data. */
98	static Atom rdesktop_clipboard_target_atom;
99	/* Atoms _RDESKTOP_PRIMARY_TIMESTAMP_TARGET and _RDESKTOP_CLIPBOARD_TIMESTAMP_TARGET
100	are used to store the timestamps for when a window got ownership of the selections.
101	We use these to determine which is more recent and should be used. */
102	static Atom rdesktop_primary_timestamp_target_atom, rdesktop_clipboard_timestamp_target_atom;
103	/* Storage for timestamps since we get them in two separate notifications. */
104	static Time primary_timestamp, clipboard_timestamp;
105	/* Clipboard target for getting a list of native Windows clipboard formats. The
106	presence of this target indicates that the selection owner is another rdesktop. */
107	static Atom rdesktop_clipboard_formats_atom;
108	/* The clipboard target (X jargon for "clipboard format") for rdesktop-to-rdesktop
109	interchange of Windows native clipboard data. The requestor must supply the
110	desired native Windows clipboard format in the associated property. */
111	static Atom rdesktop_native_atom;
112	/* Local copy of the list of native Windows clipboard formats. */
113	static uint8 *formats_data = NULL;
114	static uint32 formats_data_length = 0;
115	/* We need to know when another rdesktop process gets or loses ownership of a
116	selection. Without XFixes we do this by touching a property on the root window
117	which will generate PropertyNotify notifications. */
118	static Atom rdesktop_selection_notify_atom;
119	/* State variables that indicate if we're currently probing the targets of the
120	selection owner. reprobe_selections indicate that the ownership changed in
121	the middle of the current probe so it should be restarted. */
122	static RD_BOOL probing_selections, reprobe_selections;
123	/* Atoms _RDESKTOP_PRIMARY_OWNER and _RDESKTOP_CLIPBOARD_OWNER. Used as properties
124	on the root window to indicate which selections that are owned by rdesktop. */
125	static Atom rdesktop_primary_owner_atom, rdesktop_clipboard_owner_atom;
126	static Atom format_string_atom, format_utf8_string_atom, format_unicode_atom;
127	/* Atom of the INCR clipboard type (see ICCCM on "INCR Properties") */
128	static Atom incr_atom;
129	/* Stores the last "selection request" (= another X client requesting clipboard data from us).
130	To satisfy such a request, we request the clipboard data from the RDP server.
131	When we receive the response from the RDP server (asynchronously), this variable gives us
132	the context to proceed. */
133	static XSelectionRequestEvent selection_request;
134	/* Denotes we have a pending selection request. */
135	static RD_BOOL has_selection_request;
136	/* Stores the clipboard format (CF_TEXT, CF_UNICODETEXT etc.) requested in the last
137	CLIPDR_DATA_REQUEST (= the RDP server requesting clipboard data from us).
138	When we receive this data from whatever X client offering it, this variable gives us
139	the context to proceed.
140	*/
141	static int rdp_clipboard_request_format;
142	/* Array of offered clipboard targets that will be sent to fellow X clients upon a TARGETS request. */
143	static Atom targets[MAX_TARGETS];
144	static int num_targets;
145	/* Denotes that an rdesktop (not this rdesktop) is owning the selection,
146	allowing us to interchange Windows native clipboard data directly. */
147	static RD_BOOL rdesktop_is_selection_owner = False;
148	/* Time when we acquired the selection. */
149	static Time acquire_time = 0;
150
151	/* Denotes that an INCR ("chunked") transfer is in progress. */
152	static int g_waiting_for_INCR = 0;
153	/* Denotes the target format of the ongoing INCR ("chunked") transfer. */
154	static Atom g_incr_target = 0;
155	/* Buffers an INCR transfer. */
156	static uint8 *g_clip_buffer = 0;
157	/* Denotes the size of g_clip_buffer. */
158	static uint32 g_clip_buflen = 0;
159
160	/* Translates CR-LF to LF.
161	Changes the string in-place.
162	Does not stop on embedded nulls.
163	The length is updated. */
164	static void
165	crlf2lf(uint8 * data, uint32 * length)
166	{
167	uint8 dst, src;
168	src = dst = data;
169	while (src < data + *length)
170	{
171	if (*src != '\x0d')
172	dst++ = src;
173	src++;
174	}
175	*length = dst - data;
176	}
177
178	#ifdef USE_UNICODE_CLIPBOARD
179	/* Translate LF to CR-LF. To do this, we must allocate more memory.
180	The returned string is null-terminated, as required by CF_UNICODETEXT.
181	The size is updated. */
182	static uint8 *
183	utf16_lf2crlf(uint8 * data, uint32 * size)
184	{
185	uint8 *result;
186	uint16 inptr, outptr;
187	RD_BOOL swap_endianess;
188
189	/* Worst case: Every char is LF */
190	result = xmalloc((size 2) + 2);
191	if (result == NULL)
192	return NULL;
193
194	inptr = (uint16 *) data;
195	outptr = (uint16 *) result;
196
197	/* Check for a reversed BOM */
198	swap_endianess = (*inptr == 0xfffe);
199
200	uint16 uvalue_previous = 0; /* Kept so we'll avoid translating CR-LF to CR-CR-LF */
201	while ((uint8 ) inptr < data + size)
202	{
203	uint16 uvalue = *inptr;
204	if (swap_endianess)
205	uvalue = ((uvalue << 8) & 0xff00) + (uvalue >> 8);
206	if ((uvalue == 0x0a) && (uvalue_previous != 0x0d))
207	*outptr++ = swap_endianess ? 0x0d00 : 0x0d;
208	uvalue_previous = uvalue;
209	outptr++ = inptr++;
210	}
211	outptr++ = 0; / null termination */
212	size = (uint8 ) outptr - result;
213
214	return result;
215	}
216	#else
217	/* Translate LF to CR-LF. To do this, we must allocate more memory.
218	The length is updated. */
219	static uint8 *
220	lf2crlf(uint8 * data, uint32 * length)
221	{
222	uint8 result, p, *o;
223
224	/* Worst case: Every char is LF */
225	result = xmalloc(length 2);
226
227	p = data;
228	o = result;
229
230	uint8 previous = '\0'; /* Kept to avoid translating CR-LF to CR-CR-LF */
231	while (p < data + *length)
232	{
233	if ((*p == '\x0a') && (previous != '\x0d'))
234	*o++ = '\x0d';
235	previous = *p;
236	o++ = p++;
237	}
238	*length = o - result;
239
240	/* Convenience */
241	*o++ = '\0';
242
243	return result;
244	}
245	#endif
246
247	static void
248	xclip_provide_selection(XSelectionRequestEvent * req, Atom type, unsigned int format, uint8 * data,
249	uint32 length)
250	{
251	XEvent xev;
252
253	DEBUG_CLIPBOARD(("xclip_provide_selection: requestor=0x%08x, target=%s, property=%s, length=%u\n", (unsigned) req->requestor, XGetAtomName(g_display, req->target), XGetAtomName(g_display, req->property), (unsigned) length));
254
255	XChangeProperty(g_display, req->requestor, req->property,
256	type, format, PropModeReplace, data, length);
257
258	xev.xselection.type = SelectionNotify;
259	xev.xselection.serial = 0;
260	xev.xselection.send_event = True;
261	xev.xselection.requestor = req->requestor;
262	xev.xselection.selection = req->selection;
263	xev.xselection.target = req->target;
264	xev.xselection.property = req->property;
265	xev.xselection.time = req->time;
266	XSendEvent(g_display, req->requestor, False, NoEventMask, &xev);
267	}
268
269	/* Replies a clipboard requestor, telling that we're unable to satisfy his request for whatever reason.
270	This has the benefit of finalizing the clipboard negotiation and thus not leaving our requestor
271	lingering (and, potentially, stuck). */
272	static void
273	xclip_refuse_selection(XSelectionRequestEvent * req)
274	{
275	XEvent xev;
276
277	DEBUG_CLIPBOARD(("xclip_refuse_selection: requestor=0x%08x, target=%s, property=%s\n",
278	(unsigned) req->requestor, XGetAtomName(g_display, req->target),
279	XGetAtomName(g_display, req->property)));
280
281	xev.xselection.type = SelectionNotify;
282	xev.xselection.serial = 0;
283	xev.xselection.send_event = True;
284	xev.xselection.requestor = req->requestor;
285	xev.xselection.selection = req->selection;
286	xev.xselection.target = req->target;
287	xev.xselection.property = None;
288	xev.xselection.time = req->time;
289	XSendEvent(g_display, req->requestor, False, NoEventMask, &xev);
290	}
291
292	/* Wrapper for cliprdr_send_data which also cleans the request state. */
293	static void
294	helper_cliprdr_send_response(uint8 * data, uint32 length)
295	{
296	if (rdp_clipboard_request_format != 0)
297	{
298	cliprdr_send_data(data, length);
299	rdp_clipboard_request_format = 0;
300	if (!rdesktop_is_selection_owner)
301	cliprdr_send_simple_native_format_announce(RDP_CF_TEXT);
302	}
303	}
304
305	/* Last resort, when we have to provide clipboard data but for whatever
306	reason couldn't get any.
307	*/
308	static void
309	helper_cliprdr_send_empty_response()
310	{
311	helper_cliprdr_send_response(NULL, 0);
312	}
313
314	/* Replies with clipboard data to RDP, converting it from the target format
315	to the expected RDP format as necessary. Returns true if data was sent.
316	*/
317	static RD_BOOL
318	xclip_send_data_with_convert(uint8 * source, size_t source_size, Atom target)
319	{
320	DEBUG_CLIPBOARD(("xclip_send_data_with_convert: target=%s, size=%u\n",
321	XGetAtomName(g_display, target), (unsigned) source_size));
322
323	#ifdef USE_UNICODE_CLIPBOARD
324	if (target == format_string_atom \|\|
325	target == format_unicode_atom \|\| target == format_utf8_string_atom)
326	{
327	size_t unicode_buffer_size;
328	char *unicode_buffer;
329	iconv_t cd;
330	size_t unicode_buffer_size_remaining;
331	char *unicode_buffer_remaining;
332	char *data_remaining;
333	size_t data_size_remaining;
334	uint32 translated_data_size;
335	uint8 *translated_data;
336
337	if (rdp_clipboard_request_format != RDP_CF_TEXT)
338	return False;
339
340	/* Make an attempt to convert any string we send to Unicode.
341	We don't know what the RDP server's ANSI Codepage is, or how to convert
342	to it, so using CF_TEXT is not safe (and is unnecessary, since all
343	WinNT versions are Unicode-minded).
344	*/
345	if (target == format_string_atom)
346	{
347	char *locale_charset = nl_langinfo(CODESET);
348	cd = iconv_open(WINDOWS_CODEPAGE, locale_charset);
349	if (cd == (iconv_t) - 1)
350	{
351	DEBUG_CLIPBOARD(("Locale charset %s not found in iconv. Unable to convert clipboard text.\n", locale_charset));
352	return False;
353	}
354	unicode_buffer_size = source_size * 4;
355	}
356	else if (target == format_unicode_atom)
357	{
358	cd = iconv_open(WINDOWS_CODEPAGE, "UCS-2");
359	if (cd == (iconv_t) - 1)
360	{
361	return False;
362	}
363	unicode_buffer_size = source_size;
364	}
365	else if (target == format_utf8_string_atom)
366	{
367	cd = iconv_open(WINDOWS_CODEPAGE, "UTF-8");
368	if (cd == (iconv_t) - 1)
369	{
370	return False;
371	}
372	/* UTF-8 is guaranteed to be less or equally compact
373	as UTF-16 for all Unicode chars >=2 bytes.
374	*/
375	unicode_buffer_size = source_size * 2;
376	}
377	else
378	{
379	return False;
380	}
381
382	unicode_buffer = xmalloc(unicode_buffer_size);
383	unicode_buffer_size_remaining = unicode_buffer_size;
384	unicode_buffer_remaining = unicode_buffer;
385	data_remaining = (char *) source;
386	data_size_remaining = source_size;
387	iconv(cd, (ICONV_CONST char **) &data_remaining, &data_size_remaining,
388	&unicode_buffer_remaining, &unicode_buffer_size_remaining);
389	iconv_close(cd);
390
391	/* translate linebreaks */
392	translated_data_size = unicode_buffer_size - unicode_buffer_size_remaining;
393	translated_data = utf16_lf2crlf((uint8 *) unicode_buffer, &translated_data_size);
394	if (translated_data != NULL)
395	{
396	DEBUG_CLIPBOARD(("Sending Unicode string of %d bytes\n",
397	translated_data_size));
398	helper_cliprdr_send_response(translated_data, translated_data_size);
399	xfree(translated_data); /* Not the same thing as XFree! */
400	}
401
402	xfree(unicode_buffer);
403
404	return True;
405	}
406	#else
407	if (target == format_string_atom)
408	{
409	uint8 *translated_data;
410	uint32 length = source_size;
411
412	if (rdp_clipboard_request_format != RDP_CF_TEXT)
413	return False;
414
415	DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n"));
416	translated_data = lf2crlf(source, &length);
417	if (translated_data != NULL)
418	{
419	helper_cliprdr_send_response(translated_data, length + 1);
420	xfree(translated_data); /* Not the same thing as XFree! */
421	}
422
423	return True;
424	}
425	#endif
426	else if (target == rdesktop_native_atom)
427	{
428	helper_cliprdr_send_response(source, source_size + 1);
429
430	return True;
431	}
432	else
433	{
434	return False;
435	}
436	}
437
438	static void
439	xclip_clear_target_props()
440	{
441	XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom);
442	XDeleteProperty(g_display, g_wnd, rdesktop_primary_timestamp_target_atom);
443	XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_timestamp_target_atom);
444	}
445
446	static void
447	xclip_notify_change()
448	{
449	XChangeProperty(g_display, DefaultRootWindow(g_display),
450	rdesktop_selection_notify_atom, XA_INTEGER, 32, PropModeReplace, NULL, 0);
451	}
452
453	static void
454	xclip_probe_selections()
455	{
456	Window primary_owner, clipboard_owner;
457
458	if (probing_selections)
459	{
460	DEBUG_CLIPBOARD(("Already probing selections. Scheduling reprobe.\n"));
461	reprobe_selections = True;
462	return;
463	}
464
465	DEBUG_CLIPBOARD(("Probing selections.\n"));
466
467	probing_selections = True;
468	reprobe_selections = False;
469
470	xclip_clear_target_props();
471
472	if (auto_mode)
473	primary_owner = XGetSelectionOwner(g_display, primary_atom);
474	else
475	primary_owner = None;
476
477	clipboard_owner = XGetSelectionOwner(g_display, clipboard_atom);
478
479	/* If we own all relevant selections then don't do anything. */
480	if (((primary_owner == g_wnd) \|\| !auto_mode) && (clipboard_owner == g_wnd))
481	goto end;
482
483	/* Both available */
484	if ((primary_owner != None) && (clipboard_owner != None))
485	{
486	primary_timestamp = 0;
487	clipboard_timestamp = 0;
488	XConvertSelection(g_display, primary_atom, timestamp_atom,
489	rdesktop_primary_timestamp_target_atom, g_wnd, CurrentTime);
490	XConvertSelection(g_display, clipboard_atom, timestamp_atom,
491	rdesktop_clipboard_timestamp_target_atom, g_wnd, CurrentTime);
492	return;
493	}
494
495	/* Just PRIMARY */
496	if (primary_owner != None)
497	{
498	XConvertSelection(g_display, primary_atom, targets_atom,
499	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
500	return;
501	}
502
503	/* Just CLIPBOARD */
504	if (clipboard_owner != None)
505	{
506	XConvertSelection(g_display, clipboard_atom, targets_atom,
507	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
508	return;
509	}
510
511	DEBUG_CLIPBOARD(("No owner of any selection.\n"));
512
513	/* FIXME:
514	Without XFIXES, we cannot reliably know the formats offered by an
515	upcoming selection owner, so we just lie about him offering
516	RDP_CF_TEXT. */
517	cliprdr_send_simple_native_format_announce(RDP_CF_TEXT);
518
519	end:
520	probing_selections = False;
521	}
522
523	/* This function is called for SelectionNotify events.
524	The SelectionNotify event is sent from the clipboard owner to the requestor
525	after his request was satisfied.
526	If this function is called, we're the requestor side. */
527	#ifndef MAKE_PROTO
528	void
529	xclip_handle_SelectionNotify(XSelectionEvent * event)
530	{
531	unsigned long nitems, bytes_left;
532	XWindowAttributes wa;
533	Atom type;
534	Atom *supported_targets;
535	int res, i, format;
536	uint8 *data = NULL;
537
538	if (event->property == None)
539	goto fail;
540
541	DEBUG_CLIPBOARD(("xclip_handle_SelectionNotify: selection=%s, target=%s, property=%s\n",
542	XGetAtomName(g_display, event->selection),
543	XGetAtomName(g_display, event->target),
544	XGetAtomName(g_display, event->property)));
545
546	if (event->target == timestamp_atom)
547	{
548	if (event->selection == primary_atom)
549	{
550	res = XGetWindowProperty(g_display, g_wnd,
551	rdesktop_primary_timestamp_target_atom, 0,
552	XMaxRequestSize(g_display), False, AnyPropertyType,
553	&type, &format, &nitems, &bytes_left, &data);
554	}
555	else
556	{
557	res = XGetWindowProperty(g_display, g_wnd,
558	rdesktop_clipboard_timestamp_target_atom, 0,
559	XMaxRequestSize(g_display), False, AnyPropertyType,
560	&type, &format, &nitems, &bytes_left, &data);
561	}
562
563
564	if ((res != Success) \|\| (nitems != 1) \|\| (format != 32))
565	{
566	DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n"));
567	goto fail;
568	}
569
570	if (event->selection == primary_atom)
571	{
572	primary_timestamp = (Time ) data;
573	if (primary_timestamp == 0)
574	primary_timestamp++;
575	XDeleteProperty(g_display, g_wnd, rdesktop_primary_timestamp_target_atom);
576	DEBUG_CLIPBOARD(("Got PRIMARY timestamp: %u\n",
577	(unsigned) primary_timestamp));
578	}
579	else
580	{
581	clipboard_timestamp = (Time ) data;
582	if (clipboard_timestamp == 0)
583	clipboard_timestamp++;
584	XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_timestamp_target_atom);
585	DEBUG_CLIPBOARD(("Got CLIPBOARD timestamp: %u\n",
586	(unsigned) clipboard_timestamp));
587	}
588
589	XFree(data);
590
591	if (primary_timestamp && clipboard_timestamp)
592	{
593	if (primary_timestamp > clipboard_timestamp)
594	{
595	DEBUG_CLIPBOARD(("PRIMARY is most recent selection.\n"));
596	XConvertSelection(g_display, primary_atom, targets_atom,
597	rdesktop_clipboard_target_atom, g_wnd,
598	event->time);
599	}
600	else
601	{
602	DEBUG_CLIPBOARD(("CLIPBOARD is most recent selection.\n"));
603	XConvertSelection(g_display, clipboard_atom, targets_atom,
604	rdesktop_clipboard_target_atom, g_wnd,
605	event->time);
606	}
607	}
608
609	return;
610	}
611
612	if (probing_selections && reprobe_selections)
613	{
614	probing_selections = False;
615	xclip_probe_selections();
616	return;
617	}
618
619	res = XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
620	0, XMaxRequestSize(g_display), False, AnyPropertyType,
621	&type, &format, &nitems, &bytes_left, &data);
622
623	xclip_clear_target_props();
624
625	if (res != Success)
626	{
627	DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n"));
628	goto fail;
629	}
630
631	if (type == incr_atom)
632	{
633	DEBUG_CLIPBOARD(("Received INCR.\n"));
634
635	XGetWindowAttributes(g_display, g_wnd, &wa);
636	if ((wa.your_event_mask \| PropertyChangeMask) != wa.your_event_mask)
637	{
638	XSelectInput(g_display, g_wnd, (wa.your_event_mask \| PropertyChangeMask));
639	}
640	XFree(data);
641	g_incr_target = event->target;
642	g_waiting_for_INCR = 1;
643	goto end;
644	}
645
646	/* Negotiate target format */
647	if (event->target == targets_atom)
648	{
649	/* Determine the best of text targets that we have available:
650	Prefer UTF8_STRING > text/unicode (unspecified encoding) > STRING
651	(ignore TEXT and COMPOUND_TEXT because we don't have code to handle them)
652	*/
653	int text_target_satisfaction = 0;
654	Atom best_text_target = 0; /* measures how much we're satisfied with what we found */
655	if (type != None)
656	{
657	supported_targets = (Atom *) data;
658	for (i = 0; i < nitems; i++)
659	{
660	DEBUG_CLIPBOARD(("Target %d: %s\n", i,
661	XGetAtomName(g_display, supported_targets[i])));
662	if (supported_targets[i] == format_string_atom)
663	{
664	if (text_target_satisfaction < 1)
665	{
666	DEBUG_CLIPBOARD(("Other party supports STRING, choosing that as best_target\n"));
667	best_text_target = supported_targets[i];
668	text_target_satisfaction = 1;
669	}
670	}
671	#ifdef USE_UNICODE_CLIPBOARD
672	else if (supported_targets[i] == format_unicode_atom)
673	{
674	if (text_target_satisfaction < 2)
675	{
676	DEBUG_CLIPBOARD(("Other party supports text/unicode, choosing that as best_target\n"));
677	best_text_target = supported_targets[i];
678	text_target_satisfaction = 2;
679	}
680	}
681	else if (supported_targets[i] == format_utf8_string_atom)
682	{
683	if (text_target_satisfaction < 3)
684	{
685	DEBUG_CLIPBOARD(("Other party supports UTF8_STRING, choosing that as best_target\n"));
686	best_text_target = supported_targets[i];
687	text_target_satisfaction = 3;
688	}
689	}
690	#endif
691	else if (supported_targets[i] == rdesktop_clipboard_formats_atom)
692	{
693	if (probing_selections && (text_target_satisfaction < 4))
694	{
695	DEBUG_CLIPBOARD(("Other party supports native formats, choosing that as best_target\n"));
696	best_text_target = supported_targets[i];
697	text_target_satisfaction = 4;
698	}
699	}
700	}
701	}
702
703	/* Kickstarting the next step in the process of satisfying RDP's
704	clipboard request -- specifically, requesting the actual clipboard data.
705	*/
706	if ((best_text_target != 0)
707	&& (!probing_selections
708	\|\| (best_text_target == rdesktop_clipboard_formats_atom)))
709	{
710	XConvertSelection(g_display, event->selection, best_text_target,
711	rdesktop_clipboard_target_atom, g_wnd, event->time);
712	goto end;
713	}
714	else
715	{
716	DEBUG_CLIPBOARD(("Unable to find a textual target to satisfy RDP clipboard text request\n"));
717	goto fail;
718	}
719	}
720	else
721	{
722	if (probing_selections)
723	{
724	Window primary_owner, clipboard_owner;
725
726	/* FIXME:
727	Without XFIXES, we must make sure that the other
728	rdesktop owns all relevant selections or we might try
729	to get a native format from non-rdesktop window later
730	on. */
731
732	clipboard_owner = XGetSelectionOwner(g_display, clipboard_atom);
733
734	if (auto_mode)
735	primary_owner = XGetSelectionOwner(g_display, primary_atom);
736	else
737	primary_owner = clipboard_owner;
738
739	if (primary_owner != clipboard_owner)
740	goto fail;
741
742	DEBUG_CLIPBOARD(("Got fellow rdesktop formats\n"));
743	probing_selections = False;
744	rdesktop_is_selection_owner = True;
745	cliprdr_send_native_format_announce(data, nitems);
746	}
747	else if ((!nitems) \|\| (!xclip_send_data_with_convert(data, nitems, event->target)))
748	{
749	goto fail;
750	}
751	}
752
753	end:
754	if (data)
755	XFree(data);
756
757	return;
758
759	fail:
760	xclip_clear_target_props();
761	if (probing_selections)
762	{
763	DEBUG_CLIPBOARD(("Unable to find suitable target. Using default text format.\n"));
764	probing_selections = False;
765	rdesktop_is_selection_owner = False;
766
767	/* FIXME:
768	Without XFIXES, we cannot reliably know the formats offered by an
769	upcoming selection owner, so we just lie about him offering
770	RDP_CF_TEXT. */
771	cliprdr_send_simple_native_format_announce(RDP_CF_TEXT);
772	}
773	else
774	{
775	helper_cliprdr_send_empty_response();
776	}
777	goto end;
778	}
779
780	/* This function is called for SelectionRequest events.
781	The SelectionRequest event is sent from the requestor to the clipboard owner
782	to request clipboard data.
783	*/
784	void
785	xclip_handle_SelectionRequest(XSelectionRequestEvent * event)
786	{
787	unsigned long nitems, bytes_left;
788	unsigned char *prop_return = NULL;
789	int format, res;
790	Atom type;
791
792	DEBUG_CLIPBOARD(("xclip_handle_SelectionRequest: selection=%s, target=%s, property=%s\n",
793	XGetAtomName(g_display, event->selection),
794	XGetAtomName(g_display, event->target),
795	XGetAtomName(g_display, event->property)));
796
797	if (event->target == targets_atom)
798	{
799	xclip_provide_selection(event, XA_ATOM, 32, (uint8 *) & targets, num_targets);
800	return;
801	}
802	else if (event->target == timestamp_atom)
803	{
804	xclip_provide_selection(event, XA_INTEGER, 32, (uint8 *) & acquire_time, 1);
805	return;
806	}
807	else if (event->target == rdesktop_clipboard_formats_atom)
808	{
809	xclip_provide_selection(event, XA_STRING, 8, formats_data, formats_data_length);
810	}
811	else
812	{
813	/* All the following targets require an async operation with the RDP server
814	and currently we don't do X clipboard request queueing so we can only
815	handle one such request at a time. */
816	if (has_selection_request)
817	{
818	DEBUG_CLIPBOARD(("Error: Another clipboard request was already sent to the RDP server and not yet responded. Refusing this request.\n"));
819	xclip_refuse_selection(event);
820	return;
821	}
822	if (event->target == rdesktop_native_atom)
823	{
824	/* Before the requestor makes a request for the _RDESKTOP_NATIVE target,
825	he should declare requestor[property] = CF_SOMETHING. */
826	res = XGetWindowProperty(g_display, event->requestor,
827	event->property, 0, 1, True,
828	XA_INTEGER, &type, &format, &nitems, &bytes_left,
829	&prop_return);
830	if (res != Success \|\| (!prop_return))
831	{
832	DEBUG_CLIPBOARD(("Requested native format but didn't specifiy which.\n"));
833	xclip_refuse_selection(event);
834	return;
835	}
836
837	format = (uint32 ) prop_return;
838	XFree(prop_return);
839	}
840	else if (event->target == format_string_atom \|\| event->target == XA_STRING)
841	{
842	/* STRING and XA_STRING are defined to be ISO8859-1 */
843	format = CF_TEXT;
844	}
845	else if (event->target == format_utf8_string_atom)
846	{
847	#ifdef USE_UNICODE_CLIPBOARD
848	format = CF_UNICODETEXT;
849	#else
850	DEBUG_CLIPBOARD(("Requested target unavailable due to lack of Unicode support. (It was not in TARGETS, so why did you ask for it?!)\n"));
851	xclip_refuse_selection(event);
852	return;
853	#endif
854	}
855	else if (event->target == format_unicode_atom)
856	{
857	/* Assuming text/unicode to be UTF-16 */
858	format = CF_UNICODETEXT;
859	}
860	else
861	{
862	DEBUG_CLIPBOARD(("Requested target unavailable. (It was not in TARGETS, so why did you ask for it?!)\n"));
863	xclip_refuse_selection(event);
864	return;
865	}
866
867	cliprdr_send_data_request(format);
868	selection_request = *event;
869	has_selection_request = True;
870	return; /* wait for data */
871	}
872	}
873
874	/* While this rdesktop holds ownership over the clipboard, it means the clipboard data
875	is offered by the RDP server (and when it is pasted inside RDP, there's no network
876	roundtrip).
877
878	This event (SelectionClear) symbolizes this rdesktop lost onwership of the clipboard
879	to some other X client. We should find out what clipboard formats this other
880	client offers and announce that to RDP. */
881	void
882	xclip_handle_SelectionClear(void)
883	{
884	DEBUG_CLIPBOARD(("xclip_handle_SelectionClear\n"));
885	xclip_notify_change();
886	xclip_probe_selections();
887	}
888
889	/* Called when any property changes in our window or the root window. */
890	void
891	xclip_handle_PropertyNotify(XPropertyEvent * event)
892	{
893	unsigned long nitems;
894	unsigned long offset = 0;
895	unsigned long bytes_left = 1;
896	int format;
897	XWindowAttributes wa;
898	uint8 *data;
899	Atom type;
900
901	if (event->state == PropertyNewValue && g_waiting_for_INCR)
902	{
903	DEBUG_CLIPBOARD(("x_clip_handle_PropertyNotify: g_waiting_for_INCR != 0\n"));
904
905	while (bytes_left > 0)
906	{
907	/* Unlike the specification, we don't set the 'delete' arugment to True
908	since we slurp the INCR's chunks in even-smaller chunks of 4096 bytes. */
909	if ((XGetWindowProperty
910	(g_display, g_wnd, rdesktop_clipboard_target_atom, offset, 4096L,
911	False, AnyPropertyType, &type, &format, &nitems, &bytes_left,
912	&data) != Success))
913	{
914	XFree(data);
915	return;
916	}
917
918	if (nitems == 0)
919	{
920	/* INCR transfer finished */
921	XGetWindowAttributes(g_display, g_wnd, &wa);
922	XSelectInput(g_display, g_wnd,
923	(wa.your_event_mask ^ PropertyChangeMask));
924	XFree(data);
925	g_waiting_for_INCR = 0;
926
927	if (g_clip_buflen > 0)
928	{
929	if (!xclip_send_data_with_convert
930	(g_clip_buffer, g_clip_buflen, g_incr_target))
931	{
932	helper_cliprdr_send_empty_response();
933	}
934	xfree(g_clip_buffer);
935	g_clip_buffer = NULL;
936	g_clip_buflen = 0;
937	}
938	}
939	else
940	{
941	/* Another chunk in the INCR transfer */
942	offset += (nitems / 4); /* offset at which to begin the next slurp */
943	g_clip_buffer = xrealloc(g_clip_buffer, g_clip_buflen + nitems);
944	memcpy(g_clip_buffer + g_clip_buflen, data, nitems);
945	g_clip_buflen += nitems;
946
947	XFree(data);
948	}
949	}
950	XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom);
951	return;
952	}
953
954	if ((event->atom == rdesktop_selection_notify_atom) &&
955	(event->window == DefaultRootWindow(g_display)))
956	xclip_probe_selections();
957	}
958	#endif
959
960
961	/* Called when the RDP server announces new clipboard data formats.
962	In response, we:
963	- take ownership over the clipboard
964	- declare those formats in their Windows native form
965	to other rdesktop instances on this X server */
966	void
967	ui_clip_format_announce(uint8 * data, uint32 length)
968	{
969	acquire_time = g_last_gesturetime;
970
971	XSetSelectionOwner(g_display, primary_atom, g_wnd, acquire_time);
972	if (XGetSelectionOwner(g_display, primary_atom) != g_wnd)
973	warning("Failed to aquire ownership of PRIMARY clipboard\n");
974
975	XSetSelectionOwner(g_display, clipboard_atom, g_wnd, acquire_time);
976	if (XGetSelectionOwner(g_display, clipboard_atom) != g_wnd)
977	warning("Failed to aquire ownership of CLIPBOARD clipboard\n");
978
979	if (formats_data)
980	xfree(formats_data);
981	formats_data = xmalloc(length);
982	memcpy(formats_data, data, length);
983	formats_data_length = length;
984
985	xclip_notify_change();
986	}
987
988	/* Called when the RDP server responds with clipboard data (after we've requested it). */
989	void
990	ui_clip_handle_data(uint8 * data, uint32 length)
991	{
992	RD_BOOL free_data = False;
993
994	if (length == 0)
995	{
996	xclip_refuse_selection(&selection_request);
997	has_selection_request = False;
998	return;
999	}
1000
1001	if (selection_request.target == format_string_atom \|\| selection_request.target == XA_STRING)
1002	{
1003	/* We're expecting a CF_TEXT response */
1004	uint8 *firstnull;
1005
1006	/* translate linebreaks */
1007	crlf2lf(data, &length);
1008
1009	/* Only send data up to null byte, if any */
1010	firstnull = (uint8 ) strchr((char ) data, '\0');
1011	if (firstnull)
1012	{
1013	length = firstnull - data + 1;
1014	}
1015	}
1016	#ifdef USE_UNICODE_CLIPBOARD
1017	else if (selection_request.target == format_utf8_string_atom)
1018	{
1019	/* We're expecting a CF_UNICODETEXT response */
1020	iconv_t cd = iconv_open("UTF-8", WINDOWS_CODEPAGE);
1021	if (cd != (iconv_t) - 1)
1022	{
1023	size_t utf8_length = length * 2;
1024	char *utf8_data = malloc(utf8_length);
1025	size_t utf8_length_remaining = utf8_length;
1026	char *utf8_data_remaining = utf8_data;
1027	char data_remaining = (char ) data;
1028	size_t length_remaining = (size_t) length;
1029	if (utf8_data == NULL)
1030	{
1031	iconv_close(cd);
1032	return;
1033	}
1034	iconv(cd, (ICONV_CONST char **) &data_remaining, &length_remaining,
1035	&utf8_data_remaining, &utf8_length_remaining);
1036	iconv_close(cd);
1037	free_data = True;
1038	data = (uint8 *) utf8_data;
1039	length = utf8_length - utf8_length_remaining;
1040	/* translate linebreaks (works just as well on UTF-8) */
1041	crlf2lf(data, &length);
1042	}
1043	}
1044	else if (selection_request.target == format_unicode_atom)
1045	{
1046	/* We're expecting a CF_UNICODETEXT response, so what we're
1047	receiving matches our requirements and there's no need
1048	for further conversions. */
1049	}
1050	#endif
1051	else if (selection_request.target == rdesktop_native_atom)
1052	{
1053	/* Pass as-is */
1054	}
1055	else
1056	{
1057	DEBUG_CLIPBOARD(("ui_clip_handle_data: BUG! I don't know how to convert selection target %s!\n", XGetAtomName(g_display, selection_request.target)));
1058	xclip_refuse_selection(&selection_request);
1059	has_selection_request = False;
1060	return;
1061	}
1062
1063	xclip_provide_selection(&selection_request, selection_request.target, 8, data, length - 1);
1064	has_selection_request = False;
1065
1066	if (free_data)
1067	free(data);
1068	}
1069
1070	void
1071	ui_clip_request_failed()
1072	{
1073	xclip_refuse_selection(&selection_request);
1074	has_selection_request = False;
1075	}
1076
1077	void
1078	ui_clip_request_data(uint32 format)
1079	{
1080	Window primary_owner, clipboard_owner;
1081
1082	DEBUG_CLIPBOARD(("Request from server for format %d\n", format));
1083	rdp_clipboard_request_format = format;
1084
1085	if (probing_selections)
1086	{
1087	DEBUG_CLIPBOARD(("ui_clip_request_data: Selection probe in progress. Cannot handle request.\n"));
1088	helper_cliprdr_send_empty_response();
1089	return;
1090	}
1091
1092	xclip_clear_target_props();
1093
1094	if (rdesktop_is_selection_owner)
1095	{
1096	XChangeProperty(g_display, g_wnd, rdesktop_clipboard_target_atom,
1097	XA_INTEGER, 32, PropModeReplace, (unsigned char *) &format, 1);
1098
1099	XConvertSelection(g_display, primary_atom, rdesktop_native_atom,
1100	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
1101	return;
1102	}
1103
1104	if (auto_mode)
1105	primary_owner = XGetSelectionOwner(g_display, primary_atom);
1106	else
1107	primary_owner = None;
1108
1109	clipboard_owner = XGetSelectionOwner(g_display, clipboard_atom);
1110
1111	/* Both available */
1112	if ((primary_owner != None) && (clipboard_owner != None))
1113	{
1114	primary_timestamp = 0;
1115	clipboard_timestamp = 0;
1116	XConvertSelection(g_display, primary_atom, timestamp_atom,
1117	rdesktop_primary_timestamp_target_atom, g_wnd, CurrentTime);
1118	XConvertSelection(g_display, clipboard_atom, timestamp_atom,
1119	rdesktop_clipboard_timestamp_target_atom, g_wnd, CurrentTime);
1120	return;
1121	}
1122
1123	/* Just PRIMARY */
1124	if (primary_owner != None)
1125	{
1126	XConvertSelection(g_display, primary_atom, targets_atom,
1127	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
1128	return;
1129	}
1130
1131	/* Just CLIPBOARD */
1132	if (clipboard_owner != None)
1133	{
1134	XConvertSelection(g_display, clipboard_atom, targets_atom,
1135	rdesktop_clipboard_target_atom, g_wnd, CurrentTime);
1136	return;
1137	}
1138
1139	/* No data available */
1140	helper_cliprdr_send_empty_response();
1141	}
1142
1143	void
1144	ui_clip_sync(void)
1145	{
1146	xclip_probe_selections();
1147	}
1148
1149	void
1150	ui_clip_set_mode(const char *optarg)
1151	{
1152	g_rdpclip = True;
1153
1154	if (str_startswith(optarg, "PRIMARYCLIPBOARD"))
1155	auto_mode = True;
1156	else if (str_startswith(optarg, "CLIPBOARD"))
1157	auto_mode = False;
1158	else
1159	{
1160	warning("Invalid clipboard mode '%s'.\n", optarg);
1161	g_rdpclip = False;
1162	}
1163	}
1164
1165	void
1166	xclip_init(void)
1167	{
1168	if (!g_rdpclip)
1169	return;
1170
1171	if (!cliprdr_init())
1172	return;
1173
1174	primary_atom = XInternAtom(g_display, "PRIMARY", False);
1175	clipboard_atom = XInternAtom(g_display, "CLIPBOARD", False);
1176	targets_atom = XInternAtom(g_display, "TARGETS", False);
1177	timestamp_atom = XInternAtom(g_display, "TIMESTAMP", False);
1178	rdesktop_clipboard_target_atom =
1179	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TARGET", False);
1180	rdesktop_primary_timestamp_target_atom =
1181	XInternAtom(g_display, "_RDESKTOP_PRIMARY_TIMESTAMP_TARGET", False);
1182	rdesktop_clipboard_timestamp_target_atom =
1183	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TIMESTAMP_TARGET", False);
1184	incr_atom = XInternAtom(g_display, "INCR", False);
1185	format_string_atom = XInternAtom(g_display, "STRING", False);
1186	format_utf8_string_atom = XInternAtom(g_display, "UTF8_STRING", False);
1187	format_unicode_atom = XInternAtom(g_display, "text/unicode", False);
1188
1189	/* rdesktop sets _RDESKTOP_SELECTION_NOTIFY on the root window when acquiring the clipboard.
1190	Other interested rdesktops can use this to notify their server of the available formats. */
1191	rdesktop_selection_notify_atom =
1192	XInternAtom(g_display, "_RDESKTOP_SELECTION_NOTIFY", False);
1193	XSelectInput(g_display, DefaultRootWindow(g_display), PropertyChangeMask);
1194	probing_selections = False;
1195
1196	rdesktop_native_atom = XInternAtom(g_display, "_RDESKTOP_NATIVE", False);
1197	rdesktop_clipboard_formats_atom =
1198	XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_FORMATS", False);
1199	rdesktop_primary_owner_atom = XInternAtom(g_display, "_RDESKTOP_PRIMARY_OWNER", False);
1200	rdesktop_clipboard_owner_atom = XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_OWNER", False);
1201
1202	num_targets = 0;
1203	targets[num_targets++] = targets_atom;
1204	targets[num_targets++] = timestamp_atom;
1205	targets[num_targets++] = rdesktop_native_atom;
1206	targets[num_targets++] = rdesktop_clipboard_formats_atom;
1207	#ifdef USE_UNICODE_CLIPBOARD
1208	targets[num_targets++] = format_utf8_string_atom;
1209	#endif
1210	targets[num_targets++] = format_unicode_atom;
1211	targets[num_targets++] = format_string_atom;
1212	targets[num_targets++] = XA_STRING;
1213	}
1214
1215	void
1216	xclip_deinit(void)
1217	{
1218	if (XGetSelectionOwner(g_display, primary_atom) == g_wnd)
1219	XSetSelectionOwner(g_display, primary_atom, None, acquire_time);
1220	if (XGetSelectionOwner(g_display, clipboard_atom) == g_wnd)
1221	XSetSelectionOwner(g_display, clipboard_atom, None, acquire_time);
1222	xclip_notify_change();
1223	}

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source: vbox/trunk/src/VBox/RDP/client-1.8.4/xclip.c@ 85327

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