1 |
/* -*- c-basic-offset: 8 -*- |
2 |
rdesktop: A Remote Desktop Protocol client. |
3 |
Protocol services - Clipboard functions |
4 |
Copyright (C) Erik Forsberg <forsberg@cendio.se> 2003 |
5 |
Copyright (C) Matthew Chapman 2003 |
6 |
|
7 |
This program is free software; you can redistribute it and/or modify |
8 |
it under the terms of the GNU General Public License as published by |
9 |
the Free Software Foundation; either version 2 of the License, or |
10 |
(at your option) any later version. |
11 |
|
12 |
This program is distributed in the hope that it will be useful, |
13 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 |
GNU General Public License for more details. |
16 |
|
17 |
You should have received a copy of the GNU General Public License |
18 |
along with this program; if not, write to the Free Software |
19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 |
*/ |
21 |
|
22 |
#include <X11/Xlib.h> |
23 |
#include <X11/Xatom.h> |
24 |
#include "rdesktop.h" |
25 |
|
26 |
#define NUM_TARGETS 6 |
27 |
|
28 |
extern Display *g_display; |
29 |
extern Window g_wnd; |
30 |
extern Time g_last_gesturetime; |
31 |
|
32 |
static Atom clipboard_atom, primary_atom, targets_atom, timestamp_atom; |
33 |
static Atom rdesktop_clipboard_target_atom, rdesktop_clipboard_formats_atom, incr_atom; |
34 |
static XSelectionRequestEvent selection_request; |
35 |
static Atom targets[NUM_TARGETS]; |
36 |
static int have_primary = 0; |
37 |
static int rdesktop_is_selection_owner = 0; |
38 |
|
39 |
static int g_waiting_for_INCR = 0; |
40 |
static uint8 *g_clip_buffer = 0; |
41 |
static uint32 g_clip_buflen = 0; |
42 |
|
43 |
/* Replace CR-LF to LF (well, rather removing all CR:s) This is done |
44 |
in-place. The length is updated. Handles embedded nulls */ |
45 |
static void |
46 |
crlf2lf(uint8 * data, uint32 * length) |
47 |
{ |
48 |
uint8 *dst, *src; |
49 |
src = dst = data; |
50 |
while (src < data + *length) |
51 |
{ |
52 |
if (*src != '\x0d') |
53 |
*dst++ = *src; |
54 |
src++; |
55 |
} |
56 |
*length = dst - data; |
57 |
} |
58 |
|
59 |
/* Translate LF to CR-LF. To do this, we must allocate more memory. |
60 |
The length is updated. */ |
61 |
static uint8 * |
62 |
lf2crlf(uint8 * data, uint32 * length) |
63 |
{ |
64 |
uint8 *result, *p, *o; |
65 |
|
66 |
/* Worst case: Every char is LF */ |
67 |
result = xmalloc(*length * 2); |
68 |
|
69 |
p = data; |
70 |
o = result; |
71 |
|
72 |
while (p < data + *length) |
73 |
{ |
74 |
if (*p == '\x0a') |
75 |
*o++ = '\x0d'; |
76 |
*o++ = *p++; |
77 |
} |
78 |
*length = o - result; |
79 |
|
80 |
/* Convenience */ |
81 |
*o++ = '\0'; |
82 |
|
83 |
return result; |
84 |
} |
85 |
|
86 |
|
87 |
static void |
88 |
xclip_provide_selection(XSelectionRequestEvent * req, Atom type, unsigned int format, uint8 * data, |
89 |
uint32 length) |
90 |
{ |
91 |
XEvent xev; |
92 |
|
93 |
XChangeProperty(g_display, req->requestor, req->property, |
94 |
type, format, PropModeReplace, data, length); |
95 |
|
96 |
xev.xselection.type = SelectionNotify; |
97 |
xev.xselection.serial = 0; |
98 |
xev.xselection.send_event = True; |
99 |
xev.xselection.requestor = req->requestor; |
100 |
xev.xselection.selection = req->selection; |
101 |
xev.xselection.target = req->target; |
102 |
xev.xselection.property = req->property; |
103 |
xev.xselection.time = req->time; |
104 |
XSendEvent(g_display, req->requestor, False, NoEventMask, &xev); |
105 |
} |
106 |
|
107 |
#ifndef MAKE_PROTO |
108 |
void |
109 |
xclip_handle_SelectionNotify(XSelectionEvent * event) |
110 |
{ |
111 |
unsigned long nitems, bytes_left; |
112 |
XWindowAttributes wa; |
113 |
Atom type, best_target, text_target; |
114 |
Atom *supported_targets; |
115 |
int res, i, format; |
116 |
uint8 *data; |
117 |
|
118 |
if (event->property == None) |
119 |
goto fail; |
120 |
|
121 |
DEBUG_CLIPBOARD(("xclip_handle_SelectionNotify: selection=%s, target=%s, property=%s\n", |
122 |
XGetAtomName(g_display, event->selection), |
123 |
XGetAtomName(g_display, event->target), |
124 |
XGetAtomName(g_display, event->property))); |
125 |
|
126 |
if (event->property == None) |
127 |
goto fail; |
128 |
|
129 |
res = XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, |
130 |
0, XMaxRequestSize(g_display), False, AnyPropertyType, |
131 |
&type, &format, &nitems, &bytes_left, &data); |
132 |
|
133 |
if (res != Success) |
134 |
{ |
135 |
DEBUG_CLIPBOARD(("XGetWindowProperty failed!\n")); |
136 |
goto fail; |
137 |
} |
138 |
|
139 |
|
140 |
if (type == incr_atom) |
141 |
{ |
142 |
DEBUG_CLIPBOARD(("Received INCR.\n")); |
143 |
|
144 |
XGetWindowAttributes(g_display, g_wnd, &wa); |
145 |
if ((wa.your_event_mask | PropertyChangeMask) != wa.your_event_mask) |
146 |
{ |
147 |
XSelectInput(g_display, g_wnd, (wa.your_event_mask | PropertyChangeMask)); |
148 |
} |
149 |
XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
150 |
XFree(data); |
151 |
g_waiting_for_INCR = 1; |
152 |
return; |
153 |
} |
154 |
|
155 |
XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
156 |
|
157 |
/* Negotiate target format */ |
158 |
if (event->target == targets_atom) |
159 |
{ |
160 |
/* FIXME: We should choose format here based on what the server wanted */ |
161 |
best_target = XA_STRING; |
162 |
if (type != None) |
163 |
{ |
164 |
supported_targets = (Atom *) data; |
165 |
text_target = XInternAtom(g_display, "TEXT", False); |
166 |
for (i = 0; i < nitems; i++) |
167 |
{ |
168 |
DEBUG_CLIPBOARD(("Target %d: %s\n", i, |
169 |
XGetAtomName(g_display, supported_targets[i]))); |
170 |
if (supported_targets[i] == text_target) |
171 |
{ |
172 |
DEBUG_CLIPBOARD(("Other party supports TEXT, choosing that as best_target\n")); |
173 |
best_target = text_target; |
174 |
break; |
175 |
} |
176 |
} |
177 |
XFree(data); |
178 |
} |
179 |
|
180 |
XConvertSelection(g_display, primary_atom, best_target, |
181 |
rdesktop_clipboard_target_atom, g_wnd, event->time); |
182 |
return; |
183 |
} |
184 |
|
185 |
/* Translate linebreaks, but only if not getting data from |
186 |
other rdesktop instance */ |
187 |
if (event->target != rdesktop_clipboard_formats_atom) |
188 |
{ |
189 |
uint8 *translated_data; |
190 |
uint32 length = nitems; |
191 |
|
192 |
DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n")); |
193 |
translated_data = lf2crlf(data, &length); |
194 |
cliprdr_send_data(translated_data, length + 1); |
195 |
xfree(translated_data); /* Not the same thing as XFree! */ |
196 |
} |
197 |
else |
198 |
{ |
199 |
cliprdr_send_data(data, nitems + 1); |
200 |
} |
201 |
XFree(data); |
202 |
|
203 |
if (!rdesktop_is_selection_owner) |
204 |
cliprdr_send_simple_native_format_announce(CF_TEXT); |
205 |
return; |
206 |
|
207 |
fail: |
208 |
XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
209 |
XFree(data); |
210 |
cliprdr_send_data(NULL, 0); |
211 |
} |
212 |
|
213 |
void |
214 |
xclip_handle_SelectionRequest(XSelectionRequestEvent * event) |
215 |
{ |
216 |
unsigned long nitems, bytes_left; |
217 |
unsigned char *prop_return; |
218 |
uint32 *wanted_format; |
219 |
int format, res; |
220 |
Atom type; |
221 |
|
222 |
DEBUG_CLIPBOARD(("xclip_handle_SelectionRequest: selection=%s, target=%s, property=%s\n", |
223 |
XGetAtomName(g_display, event->selection), |
224 |
XGetAtomName(g_display, event->target), |
225 |
XGetAtomName(g_display, event->property))); |
226 |
|
227 |
if (event->target == targets_atom) |
228 |
{ |
229 |
xclip_provide_selection(event, XA_ATOM, 32, (uint8 *) & targets, NUM_TARGETS); |
230 |
return; |
231 |
} |
232 |
else if (event->target == timestamp_atom) |
233 |
{ |
234 |
xclip_provide_selection(event, XA_INTEGER, 32, (uint8 *) & g_last_gesturetime, 1); |
235 |
return; |
236 |
} |
237 |
else if (event->target == rdesktop_clipboard_formats_atom) |
238 |
{ |
239 |
res = XGetWindowProperty(g_display, event->requestor, |
240 |
rdesktop_clipboard_target_atom, 0, 1, True, XA_INTEGER, |
241 |
&type, &format, &nitems, &bytes_left, &prop_return); |
242 |
wanted_format = (uint32 *) prop_return; |
243 |
format = (res == Success) ? *wanted_format : CF_TEXT; |
244 |
/* FIXME: Need to free returned data? */ |
245 |
} |
246 |
else |
247 |
{ |
248 |
format = CF_TEXT; |
249 |
} |
250 |
|
251 |
cliprdr_send_data_request(format); |
252 |
selection_request = *event; |
253 |
/* wait for data */ |
254 |
} |
255 |
|
256 |
void |
257 |
xclip_handle_SelectionClear(void) |
258 |
{ |
259 |
DEBUG_CLIPBOARD(("xclip_handle_SelectionClear\n")); |
260 |
have_primary = 0; |
261 |
XDeleteProperty(g_display, DefaultRootWindow(g_display), rdesktop_clipboard_formats_atom); |
262 |
cliprdr_send_simple_native_format_announce(CF_TEXT); |
263 |
} |
264 |
|
265 |
void |
266 |
xclip_handle_PropertyNotify(XPropertyEvent * event) |
267 |
{ |
268 |
unsigned long nitems; |
269 |
unsigned long offset = 0; |
270 |
unsigned long bytes_left = 1; |
271 |
int format, res; |
272 |
XWindowAttributes wa; |
273 |
uint8 *data; |
274 |
Atom type; |
275 |
|
276 |
if (event->state == PropertyNewValue && g_waiting_for_INCR) |
277 |
{ |
278 |
DEBUG_CLIPBOARD(("x_clip_handle_PropertyNotify: g_waiting_for_INCR != 0\n")); |
279 |
|
280 |
while (bytes_left > 0) { |
281 |
if ((XGetWindowProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, offset, |
282 |
4096L, False, AnyPropertyType, |
283 |
&type, &format, &nitems, &bytes_left, &data) != Success)) |
284 |
{ |
285 |
XFree(data); |
286 |
return; |
287 |
} |
288 |
|
289 |
if (nitems == 0) |
290 |
{ |
291 |
XGetWindowAttributes(g_display, g_wnd, &wa); |
292 |
XSelectInput(g_display, g_wnd, (wa.your_event_mask ^ PropertyChangeMask)); |
293 |
XFree(data); |
294 |
g_waiting_for_INCR = 0; |
295 |
|
296 |
if (g_clip_buflen > 0) |
297 |
{ |
298 |
cliprdr_send_data(g_clip_buffer, g_clip_buflen + 1); |
299 |
|
300 |
if (!rdesktop_is_selection_owner) |
301 |
cliprdr_send_simple_native_format_announce(CF_TEXT); |
302 |
|
303 |
xfree(g_clip_buffer); |
304 |
g_clip_buffer = 0; |
305 |
g_clip_buflen = 0; |
306 |
} |
307 |
} |
308 |
else |
309 |
{ |
310 |
uint8 *translated_data; |
311 |
uint32 length = nitems; |
312 |
uint8 *tmp; |
313 |
|
314 |
offset += (length/4); |
315 |
DEBUG_CLIPBOARD(("Translating linebreaks before sending data\n")); |
316 |
translated_data = lf2crlf(data, &length); |
317 |
|
318 |
tmp = xmalloc(length + g_clip_buflen); |
319 |
strncpy((char *) tmp, (char *) g_clip_buffer, g_clip_buflen); |
320 |
xfree(g_clip_buffer); |
321 |
|
322 |
strncpy((char *) (tmp + g_clip_buflen), (char *) translated_data, length); |
323 |
xfree(translated_data); |
324 |
|
325 |
g_clip_buffer = tmp; |
326 |
g_clip_buflen += length; |
327 |
|
328 |
XFree(data); |
329 |
} |
330 |
} |
331 |
XDeleteProperty(g_display, g_wnd, rdesktop_clipboard_target_atom); |
332 |
} |
333 |
|
334 |
if (event->atom != rdesktop_clipboard_formats_atom) |
335 |
return; |
336 |
|
337 |
if (have_primary) /* from us */ |
338 |
return; |
339 |
|
340 |
if (event->state == PropertyNewValue) |
341 |
{ |
342 |
res = XGetWindowProperty(g_display, DefaultRootWindow(g_display), |
343 |
rdesktop_clipboard_formats_atom, 0, |
344 |
XMaxRequestSize(g_display), False, XA_STRING, &type, |
345 |
&format, &nitems, &bytes_left, &data); |
346 |
|
347 |
if ((res == Success) && (nitems > 0)) |
348 |
{ |
349 |
cliprdr_send_native_format_announce(data, nitems); |
350 |
rdesktop_is_selection_owner = 1; |
351 |
return; |
352 |
} |
353 |
} |
354 |
|
355 |
/* PropertyDelete, or XGetWindowProperty failed */ |
356 |
cliprdr_send_simple_native_format_announce(CF_TEXT); |
357 |
rdesktop_is_selection_owner = 0; |
358 |
} |
359 |
#endif |
360 |
|
361 |
|
362 |
void |
363 |
ui_clip_format_announce(uint8 * data, uint32 length) |
364 |
{ |
365 |
XSetSelectionOwner(g_display, primary_atom, g_wnd, g_last_gesturetime); |
366 |
if (XGetSelectionOwner(g_display, primary_atom) != g_wnd) |
367 |
{ |
368 |
warning("Failed to aquire ownership of PRIMARY clipboard\n"); |
369 |
return; |
370 |
} |
371 |
|
372 |
have_primary = 1; |
373 |
XChangeProperty(g_display, DefaultRootWindow(g_display), |
374 |
rdesktop_clipboard_formats_atom, XA_STRING, 8, PropModeReplace, data, |
375 |
length); |
376 |
|
377 |
XSetSelectionOwner(g_display, clipboard_atom, g_wnd, g_last_gesturetime); |
378 |
if (XGetSelectionOwner(g_display, clipboard_atom) != g_wnd) |
379 |
warning("Failed to aquire ownership of CLIPBOARD clipboard\n"); |
380 |
} |
381 |
|
382 |
|
383 |
void |
384 |
ui_clip_handle_data(uint8 * data, uint32 length) |
385 |
{ |
386 |
if (selection_request.target != rdesktop_clipboard_formats_atom) |
387 |
{ |
388 |
uint8 *firstnull; |
389 |
|
390 |
/* translate linebreaks */ |
391 |
crlf2lf(data, &length); |
392 |
|
393 |
/* Only send data up to null byte, if any */ |
394 |
firstnull = (uint8 *) strchr((char *) data, '\0'); |
395 |
if (firstnull) |
396 |
{ |
397 |
length = firstnull - data + 1; |
398 |
} |
399 |
} |
400 |
|
401 |
xclip_provide_selection(&selection_request, XA_STRING, 8, data, length - 1); |
402 |
} |
403 |
|
404 |
void |
405 |
ui_clip_request_data(uint32 format) |
406 |
{ |
407 |
Window selectionowner; |
408 |
|
409 |
DEBUG_CLIPBOARD(("Request from server for format %d\n", format)); |
410 |
|
411 |
if (rdesktop_is_selection_owner) |
412 |
{ |
413 |
XChangeProperty(g_display, g_wnd, rdesktop_clipboard_target_atom, |
414 |
XA_INTEGER, 32, PropModeReplace, (unsigned char *) &format, 1); |
415 |
|
416 |
XConvertSelection(g_display, primary_atom, rdesktop_clipboard_formats_atom, |
417 |
rdesktop_clipboard_target_atom, g_wnd, CurrentTime); |
418 |
return; |
419 |
} |
420 |
|
421 |
selectionowner = XGetSelectionOwner(g_display, primary_atom); |
422 |
if (selectionowner != None) |
423 |
{ |
424 |
XConvertSelection(g_display, primary_atom, targets_atom, |
425 |
rdesktop_clipboard_target_atom, g_wnd, CurrentTime); |
426 |
return; |
427 |
} |
428 |
|
429 |
/* No PRIMARY, try CLIPBOARD */ |
430 |
selectionowner = XGetSelectionOwner(g_display, clipboard_atom); |
431 |
if (selectionowner != None) |
432 |
{ |
433 |
XConvertSelection(g_display, clipboard_atom, targets_atom, |
434 |
rdesktop_clipboard_target_atom, g_wnd, CurrentTime); |
435 |
return; |
436 |
} |
437 |
|
438 |
/* No data available */ |
439 |
cliprdr_send_data(NULL, 0); |
440 |
} |
441 |
|
442 |
void |
443 |
ui_clip_sync(void) |
444 |
{ |
445 |
cliprdr_send_simple_native_format_announce(CF_TEXT); |
446 |
} |
447 |
|
448 |
|
449 |
void |
450 |
xclip_init(void) |
451 |
{ |
452 |
if (!cliprdr_init()) |
453 |
return; |
454 |
|
455 |
primary_atom = XInternAtom(g_display, "PRIMARY", False); |
456 |
clipboard_atom = XInternAtom(g_display, "CLIPBOARD", False); |
457 |
targets_atom = XInternAtom(g_display, "TARGETS", False); |
458 |
timestamp_atom = XInternAtom(g_display, "TIMESTAMP", False); |
459 |
rdesktop_clipboard_target_atom = |
460 |
XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_TARGET", False); |
461 |
incr_atom = XInternAtom(g_display, "INCR", False); |
462 |
targets[0] = targets_atom; |
463 |
targets[1] = XInternAtom(g_display, "TEXT", False); |
464 |
targets[2] = XInternAtom(g_display, "STRING", False); |
465 |
targets[3] = XInternAtom(g_display, "text/unicode", False); |
466 |
targets[4] = XInternAtom(g_display, "TIMESTAMP", False); |
467 |
targets[5] = XA_STRING; |
468 |
|
469 |
/* rdesktop sets _RDESKTOP_CLIPBOARD_FORMATS on the root window when acquiring the clipboard. |
470 |
Other interested rdesktops can use this to notify their server of the available formats. */ |
471 |
rdesktop_clipboard_formats_atom = |
472 |
XInternAtom(g_display, "_RDESKTOP_CLIPBOARD_FORMATS", False); |
473 |
XSelectInput(g_display, DefaultRootWindow(g_display), PropertyChangeMask); |
474 |
} |