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ede4db72 | 1 | /* X Selection processing for emacs |
c6c5df7f | 2 | Copyright (C) 1993 Free Software Foundation. |
ede4db72 RS |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
c6c5df7f | 20 | /* x_handle_selection_notify |
80da0190 RS |
21 | x_reply_selection_request */ |
22 | ||
c6c5df7f | 23 | |
ede4db72 RS |
24 | /* Rewritten by jwz */ |
25 | ||
26 | #include "config.h" | |
27 | #include "lisp.h" | |
7da64e5c RS |
28 | #if 0 |
29 | #include <stdio.h> /* termhooks.h needs this */ | |
30 | #include "termhooks.h" | |
31 | #endif | |
ede4db72 | 32 | #include "xterm.h" /* for all of the X includes */ |
7da64e5c RS |
33 | #include "dispextern.h" /* frame.h seems to want this */ |
34 | #include "frame.h" /* Need this to get the X window of selected_frame */ | |
9ac0d9e0 | 35 | #include "blockinput.h" |
7da64e5c RS |
36 | |
37 | #define xfree free | |
ede4db72 RS |
38 | |
39 | #define CUT_BUFFER_SUPPORT | |
40 | ||
41 | static Atom Xatom_CLIPBOARD, Xatom_TIMESTAMP, Xatom_TEXT, Xatom_DELETE, | |
42 | Xatom_MULTIPLE, Xatom_INCR, Xatom_EMACS_TMP, Xatom_TARGETS, Xatom_NULL, | |
43 | Xatom_ATOM_PAIR; | |
44 | ||
45 | Lisp_Object QPRIMARY, QSECONDARY, QSTRING, QINTEGER, QCLIPBOARD, QTIMESTAMP, | |
46 | QTEXT, QDELETE, QMULTIPLE, QINCR, QEMACS_TMP, QTARGETS, QATOM, QNULL, | |
47 | QATOM_PAIR; | |
48 | ||
49 | #ifdef CUT_BUFFER_SUPPORT | |
50 | Lisp_Object QCUT_BUFFER0, QCUT_BUFFER1, QCUT_BUFFER2, QCUT_BUFFER3, | |
51 | QCUT_BUFFER4, QCUT_BUFFER5, QCUT_BUFFER6, QCUT_BUFFER7; | |
52 | #endif | |
53 | ||
54 | Lisp_Object Vx_lost_selection_hooks; | |
55 | Lisp_Object Vx_sent_selection_hooks; | |
56 | ||
57 | /* If this is a smaller number than the max-request-size of the display, | |
58 | emacs will use INCR selection transfer when the selection is larger | |
59 | than this. The max-request-size is usually around 64k, so if you want | |
60 | emacs to use incremental selection transfers when the selection is | |
61 | smaller than that, set this. I added this mostly for debugging the | |
62 | incremental transfer stuff, but it might improve server performance. | |
63 | */ | |
64 | #define MAX_SELECTION_QUANTUM 0xFFFFFF | |
65 | ||
c3498e64 JB |
66 | #ifdef HAVE_X11R4 |
67 | #define SELECTION_QUANTUM(dpy) ((XMaxRequestSize(dpy) << 2) - 100) | |
68 | #else | |
69 | #define SELECTION_QUANTUM(dpy) (((dpy)->max_request_size << 2) - 100) | |
70 | #endif | |
ede4db72 | 71 | |
7da64e5c RS |
72 | /* The timestamp of the last input event Emacs received from the X server. */ |
73 | unsigned long last_event_timestamp; | |
ede4db72 RS |
74 | |
75 | /* This is an association list whose elements are of the form | |
76 | ( selection-name selection-value selection-timestamp ) | |
77 | selection-name is a lisp symbol, whose name is the name of an X Atom. | |
78 | selection-value is the value that emacs owns for that selection. | |
79 | It may be any kind of Lisp object. | |
80 | selection-timestamp is the time at which emacs began owning this selection, | |
81 | as a cons of two 16-bit numbers (making a 32 bit time.) | |
82 | If there is an entry in this alist, then it can be assumed that emacs owns | |
83 | that selection. | |
84 | The only (eq) parts of this list that are visible from Lisp are the | |
85 | selection-values. | |
86 | */ | |
87 | Lisp_Object Vselection_alist; | |
88 | ||
89 | /* This is an alist whose CARs are selection-types (whose names are the same | |
90 | as the names of X Atoms) and whose CDRs are the names of Lisp functions to | |
91 | call to convert the given Emacs selection value to a string representing | |
92 | the given selection type. This is for Lisp-level extension of the emacs | |
93 | selection handling. | |
94 | */ | |
95 | Lisp_Object Vselection_converter_alist; | |
96 | ||
97 | /* If the selection owner takes too long to reply to a selection request, | |
80da0190 | 98 | we give up on it. This is in milliseconds (0 = no timeout.) |
ede4db72 RS |
99 | */ |
100 | int x_selection_timeout; | |
101 | ||
102 | \f | |
103 | /* Utility functions */ | |
104 | ||
105 | static void lisp_data_to_selection_data (); | |
106 | static Lisp_Object selection_data_to_lisp_data (); | |
107 | static Lisp_Object x_get_window_property_as_lisp_data (); | |
108 | ||
109 | static int expect_property_change (); | |
110 | static void wait_for_property_change (); | |
111 | static void unexpect_property_change (); | |
112 | static int waiting_for_other_props_on_window (); | |
113 | ||
114 | /* This converts a Lisp symbol to a server Atom, avoiding a server | |
115 | roundtrip whenever possible. */ | |
116 | ||
117 | static Atom | |
118 | symbol_to_x_atom (display, sym) | |
119 | Display *display; | |
120 | Lisp_Object sym; | |
121 | { | |
122 | Atom val; | |
123 | if (NILP (sym)) return 0; | |
124 | if (EQ (sym, QPRIMARY)) return XA_PRIMARY; | |
125 | if (EQ (sym, QSECONDARY)) return XA_SECONDARY; | |
126 | if (EQ (sym, QSTRING)) return XA_STRING; | |
127 | if (EQ (sym, QINTEGER)) return XA_INTEGER; | |
128 | if (EQ (sym, QATOM)) return XA_ATOM; | |
129 | if (EQ (sym, QCLIPBOARD)) return Xatom_CLIPBOARD; | |
130 | if (EQ (sym, QTIMESTAMP)) return Xatom_TIMESTAMP; | |
131 | if (EQ (sym, QTEXT)) return Xatom_TEXT; | |
132 | if (EQ (sym, QDELETE)) return Xatom_DELETE; | |
133 | if (EQ (sym, QMULTIPLE)) return Xatom_MULTIPLE; | |
134 | if (EQ (sym, QINCR)) return Xatom_INCR; | |
135 | if (EQ (sym, QEMACS_TMP)) return Xatom_EMACS_TMP; | |
136 | if (EQ (sym, QTARGETS)) return Xatom_TARGETS; | |
137 | if (EQ (sym, QNULL)) return Xatom_NULL; | |
138 | #ifdef CUT_BUFFER_SUPPORT | |
139 | if (EQ (sym, QCUT_BUFFER0)) return XA_CUT_BUFFER0; | |
140 | if (EQ (sym, QCUT_BUFFER1)) return XA_CUT_BUFFER1; | |
141 | if (EQ (sym, QCUT_BUFFER2)) return XA_CUT_BUFFER2; | |
142 | if (EQ (sym, QCUT_BUFFER3)) return XA_CUT_BUFFER3; | |
143 | if (EQ (sym, QCUT_BUFFER4)) return XA_CUT_BUFFER4; | |
144 | if (EQ (sym, QCUT_BUFFER5)) return XA_CUT_BUFFER5; | |
145 | if (EQ (sym, QCUT_BUFFER6)) return XA_CUT_BUFFER6; | |
146 | if (EQ (sym, QCUT_BUFFER7)) return XA_CUT_BUFFER7; | |
147 | #endif | |
148 | if (!SYMBOLP (sym)) abort (); | |
149 | ||
150 | #if 0 | |
151 | fprintf (stderr, " XInternAtom %s\n", (char *) XSYMBOL (sym)->name->data); | |
152 | #endif | |
153 | BLOCK_INPUT; | |
154 | val = XInternAtom (display, (char *) XSYMBOL (sym)->name->data, False); | |
155 | UNBLOCK_INPUT; | |
156 | return val; | |
157 | } | |
158 | ||
159 | ||
160 | /* This converts a server Atom to a Lisp symbol, avoiding server roundtrips | |
161 | and calls to intern whenever possible. */ | |
162 | ||
163 | static Lisp_Object | |
164 | x_atom_to_symbol (display, atom) | |
165 | Display *display; | |
166 | Atom atom; | |
167 | { | |
168 | char *str; | |
169 | Lisp_Object val; | |
170 | if (! atom) return Qnil; | |
7da64e5c RS |
171 | switch (atom) |
172 | { | |
173 | case XA_PRIMARY: | |
174 | return QPRIMARY; | |
175 | case XA_SECONDARY: | |
176 | return QSECONDARY; | |
177 | case XA_STRING: | |
178 | return QSTRING; | |
179 | case XA_INTEGER: | |
180 | return QINTEGER; | |
181 | case XA_ATOM: | |
182 | return QATOM; | |
ede4db72 | 183 | #ifdef CUT_BUFFER_SUPPORT |
7da64e5c RS |
184 | case XA_CUT_BUFFER0: |
185 | return QCUT_BUFFER0; | |
186 | case XA_CUT_BUFFER1: | |
187 | return QCUT_BUFFER1; | |
188 | case XA_CUT_BUFFER2: | |
189 | return QCUT_BUFFER2; | |
190 | case XA_CUT_BUFFER3: | |
191 | return QCUT_BUFFER3; | |
192 | case XA_CUT_BUFFER4: | |
193 | return QCUT_BUFFER4; | |
194 | case XA_CUT_BUFFER5: | |
195 | return QCUT_BUFFER5; | |
196 | case XA_CUT_BUFFER6: | |
197 | return QCUT_BUFFER6; | |
198 | case XA_CUT_BUFFER7: | |
199 | return QCUT_BUFFER7; | |
ede4db72 | 200 | #endif |
7da64e5c RS |
201 | } |
202 | ||
203 | if (atom == Xatom_CLIPBOARD) | |
204 | return QCLIPBOARD; | |
205 | if (atom == Xatom_TIMESTAMP) | |
206 | return QTIMESTAMP; | |
207 | if (atom == Xatom_TEXT) | |
208 | return QTEXT; | |
209 | if (atom == Xatom_DELETE) | |
210 | return QDELETE; | |
211 | if (atom == Xatom_MULTIPLE) | |
212 | return QMULTIPLE; | |
213 | if (atom == Xatom_INCR) | |
214 | return QINCR; | |
215 | if (atom == Xatom_EMACS_TMP) | |
216 | return QEMACS_TMP; | |
217 | if (atom == Xatom_TARGETS) | |
218 | return QTARGETS; | |
219 | if (atom == Xatom_NULL) | |
220 | return QNULL; | |
ede4db72 RS |
221 | |
222 | BLOCK_INPUT; | |
223 | str = XGetAtomName (display, atom); | |
224 | UNBLOCK_INPUT; | |
225 | #if 0 | |
226 | fprintf (stderr, " XGetAtomName --> %s\n", str); | |
227 | #endif | |
228 | if (! str) return Qnil; | |
229 | val = intern (str); | |
230 | BLOCK_INPUT; | |
231 | XFree (str); | |
232 | UNBLOCK_INPUT; | |
233 | return val; | |
234 | } | |
8a89415e | 235 | \f |
ede4db72 RS |
236 | /* Do protocol to assert ourself as a selection owner. |
237 | Update the Vselection_alist so that we can reply to later requests for | |
238 | our selection. */ | |
239 | ||
240 | static void | |
241 | x_own_selection (selection_name, selection_value) | |
242 | Lisp_Object selection_name, selection_value; | |
243 | { | |
244 | Display *display = x_current_display; | |
245 | #ifdef X_TOOLKIT | |
246 | Window selecting_window = XtWindow (selected_screen->display.x->edit_widget); | |
247 | #else | |
248 | Window selecting_window = FRAME_X_WINDOW (selected_frame); | |
249 | #endif | |
7da64e5c | 250 | Time time = last_event_timestamp; |
ede4db72 RS |
251 | Atom selection_atom; |
252 | ||
253 | CHECK_SYMBOL (selection_name, 0); | |
254 | selection_atom = symbol_to_x_atom (display, selection_name); | |
255 | ||
256 | BLOCK_INPUT; | |
257 | XSetSelectionOwner (display, selection_atom, selecting_window, time); | |
258 | UNBLOCK_INPUT; | |
259 | ||
260 | /* Now update the local cache */ | |
261 | { | |
262 | Lisp_Object selection_time; | |
263 | Lisp_Object selection_data; | |
264 | Lisp_Object prev_value; | |
265 | ||
266 | selection_time = long_to_cons ((unsigned long) time); | |
267 | selection_data = Fcons (selection_name, | |
268 | Fcons (selection_value, | |
269 | Fcons (selection_time, Qnil))); | |
270 | prev_value = assq_no_quit (selection_name, Vselection_alist); | |
271 | ||
272 | Vselection_alist = Fcons (selection_data, Vselection_alist); | |
273 | ||
274 | /* If we already owned the selection, remove the old selection data. | |
275 | Perhaps we should destructively modify it instead. | |
276 | Don't use Fdelq as that may QUIT. */ | |
277 | if (!NILP (prev_value)) | |
278 | { | |
279 | Lisp_Object rest; /* we know it's not the CAR, so it's easy. */ | |
280 | for (rest = Vselection_alist; !NILP (rest); rest = Fcdr (rest)) | |
281 | if (EQ (prev_value, Fcar (XCONS (rest)->cdr))) | |
282 | { | |
283 | XCONS (rest)->cdr = Fcdr (XCONS (rest)->cdr); | |
284 | break; | |
285 | } | |
286 | } | |
287 | } | |
288 | } | |
289 | \f | |
290 | /* Given a selection-name and desired type, look up our local copy of | |
291 | the selection value and convert it to the type. | |
292 | The value is nil or a string. | |
293 | This function is used both for remote requests | |
7da64e5c | 294 | and for local x-get-selection-internal. |
ede4db72 RS |
295 | |
296 | This calls random Lisp code, and may signal or gc. */ | |
297 | ||
298 | static Lisp_Object | |
299 | x_get_local_selection (selection_symbol, target_type) | |
300 | Lisp_Object selection_symbol, target_type; | |
301 | { | |
302 | Lisp_Object local_value; | |
303 | Lisp_Object handler_fn, value, type, check; | |
304 | int count; | |
305 | ||
306 | local_value = assq_no_quit (selection_symbol, Vselection_alist); | |
307 | ||
308 | if (NILP (local_value)) return Qnil; | |
309 | ||
310 | /* TIMESTAMP and MULTIPLE are special cases 'cause that's easiest. */ | |
311 | if (EQ (target_type, QTIMESTAMP)) | |
312 | { | |
313 | handler_fn = Qnil; | |
314 | value = XCONS (XCONS (XCONS (local_value)->cdr)->cdr)->car; | |
315 | } | |
316 | #if 0 | |
317 | else if (EQ (target_type, QDELETE)) | |
318 | { | |
319 | handler_fn = Qnil; | |
320 | Fx_disown_selection_internal | |
321 | (selection_symbol, | |
322 | XCONS (XCONS (XCONS (local_value)->cdr)->cdr)->car); | |
323 | value = QNULL; | |
324 | } | |
325 | #endif | |
326 | ||
327 | #if 0 /* #### MULTIPLE doesn't work yet */ | |
328 | else if (CONSP (target_type) | |
329 | && XCONS (target_type)->car == QMULTIPLE) | |
330 | { | |
331 | Lisp_Object pairs = XCONS (target_type)->cdr; | |
332 | int size = XVECTOR (pairs)->size; | |
333 | int i; | |
334 | /* If the target is MULTIPLE, then target_type looks like | |
335 | (MULTIPLE . [[SELECTION1 TARGET1] [SELECTION2 TARGET2] ... ]) | |
336 | We modify the second element of each pair in the vector and | |
337 | return it as [[SELECTION1 <value1>] [SELECTION2 <value2>] ... ] | |
338 | */ | |
339 | for (i = 0; i < size; i++) | |
340 | { | |
341 | Lisp_Object pair = XVECTOR (pairs)->contents [i]; | |
342 | XVECTOR (pair)->contents [1] | |
343 | = x_get_local_selection (XVECTOR (pair)->contents [0], | |
344 | XVECTOR (pair)->contents [1]); | |
345 | } | |
346 | return pairs; | |
347 | } | |
348 | #endif | |
349 | else | |
350 | { | |
351 | /* Don't allow a quit within the converter. | |
352 | When the user types C-g, he would be surprised | |
353 | if by luck it came during a converter. */ | |
354 | count = specpdl_ptr - specpdl; | |
355 | specbind (Qinhibit_quit, Qt); | |
356 | ||
357 | CHECK_SYMBOL (target_type, 0); | |
358 | handler_fn = Fcdr (Fassq (target_type, Vselection_converter_alist)); | |
1eb4d468 RS |
359 | if (!NILP (handler_fn)) |
360 | value = call3 (handler_fn, | |
361 | selection_symbol, target_type, | |
362 | XCONS (XCONS (local_value)->cdr)->car); | |
363 | else | |
364 | value = Qnil; | |
ede4db72 RS |
365 | unbind_to (count, Qnil); |
366 | } | |
367 | ||
368 | /* Make sure this value is of a type that we could transmit | |
369 | to another X client. */ | |
a87ed99c | 370 | |
ede4db72 RS |
371 | check = value; |
372 | if (CONSP (value) | |
373 | && SYMBOLP (XCONS (value)->car)) | |
374 | type = XCONS (value)->car, | |
375 | check = XCONS (value)->cdr; | |
376 | ||
377 | if (STRINGP (check) | |
378 | || VECTORP (check) | |
379 | || SYMBOLP (check) | |
7da64e5c | 380 | || INTEGERP (check) |
ede4db72 RS |
381 | || NILP (value)) |
382 | return value; | |
a87ed99c | 383 | /* Check for a value that cons_to_long could handle. */ |
ede4db72 | 384 | else if (CONSP (check) |
7da64e5c RS |
385 | && INTEGERP (XCONS (check)->car) |
386 | && (INTEGERP (XCONS (check)->cdr) | |
ede4db72 RS |
387 | || |
388 | (CONSP (XCONS (check)->cdr) | |
7da64e5c | 389 | && INTEGERP (XCONS (XCONS (check)->cdr)->car) |
ede4db72 RS |
390 | && NILP (XCONS (XCONS (check)->cdr)->cdr)))) |
391 | return value; | |
392 | else | |
393 | return | |
394 | Fsignal (Qerror, | |
a87ed99c | 395 | Fcons (build_string ("invalid data returned by selection-conversion function"), |
ede4db72 RS |
396 | Fcons (handler_fn, Fcons (value, Qnil)))); |
397 | } | |
398 | \f | |
399 | /* Subroutines of x_reply_selection_request. */ | |
400 | ||
401 | /* Send a SelectionNotify event to the requestor with property=None, | |
402 | meaning we were unable to do what they wanted. */ | |
403 | ||
404 | static void | |
405 | x_decline_selection_request (event) | |
406 | struct input_event *event; | |
407 | { | |
408 | XSelectionEvent reply; | |
409 | reply.type = SelectionNotify; | |
410 | reply.display = SELECTION_EVENT_DISPLAY (event); | |
411 | reply.requestor = SELECTION_EVENT_REQUESTOR (event); | |
412 | reply.selection = SELECTION_EVENT_SELECTION (event); | |
413 | reply.time = SELECTION_EVENT_TIME (event); | |
414 | reply.target = SELECTION_EVENT_TARGET (event); | |
415 | reply.property = None; | |
416 | ||
417 | BLOCK_INPUT; | |
418 | (void) XSendEvent (reply.display, reply.requestor, False, 0L, | |
419 | (XEvent *) &reply); | |
420 | UNBLOCK_INPUT; | |
421 | } | |
422 | ||
423 | /* This is the selection request currently being processed. | |
424 | It is set to zero when the request is fully processed. */ | |
425 | static struct input_event *x_selection_current_request; | |
426 | ||
427 | /* Used as an unwind-protect clause so that, if a selection-converter signals | |
428 | an error, we tell the requestor that we were unable to do what they wanted | |
429 | before we throw to top-level or go into the debugger or whatever. */ | |
430 | ||
431 | static Lisp_Object | |
432 | x_selection_request_lisp_error (ignore) | |
433 | Lisp_Object ignore; | |
434 | { | |
435 | if (x_selection_current_request != 0) | |
436 | x_decline_selection_request (x_selection_current_request); | |
437 | return Qnil; | |
438 | } | |
439 | \f | |
440 | /* Send the reply to a selection request event EVENT. | |
441 | TYPE is the type of selection data requested. | |
442 | DATA and SIZE describe the data to send, already converted. | |
443 | FORMAT is the unit-size (in bits) of the data to be transmitted. */ | |
444 | ||
445 | static void | |
446 | x_reply_selection_request (event, format, data, size, type) | |
447 | struct input_event *event; | |
448 | int format, size; | |
449 | unsigned char *data; | |
450 | Atom type; | |
451 | { | |
452 | XSelectionEvent reply; | |
453 | Display *display = SELECTION_EVENT_DISPLAY (event); | |
454 | Window window = SELECTION_EVENT_REQUESTOR (event); | |
455 | int bytes_remaining; | |
456 | int format_bytes = format/8; | |
457 | int max_bytes = SELECTION_QUANTUM (display); | |
458 | ||
459 | if (max_bytes > MAX_SELECTION_QUANTUM) | |
460 | max_bytes = MAX_SELECTION_QUANTUM; | |
461 | ||
462 | reply.type = SelectionNotify; | |
463 | reply.display = display; | |
464 | reply.requestor = window; | |
465 | reply.selection = SELECTION_EVENT_SELECTION (event); | |
466 | reply.time = SELECTION_EVENT_TIME (event); | |
467 | reply.target = SELECTION_EVENT_TARGET (event); | |
468 | reply.property = SELECTION_EVENT_PROPERTY (event); | |
469 | if (reply.property == None) | |
470 | reply.property = reply.target; | |
471 | ||
472 | /* #### XChangeProperty can generate BadAlloc, and we must handle it! */ | |
473 | ||
474 | BLOCK_INPUT; | |
475 | /* Store the data on the requested property. | |
476 | If the selection is large, only store the first N bytes of it. | |
477 | */ | |
478 | bytes_remaining = size * format_bytes; | |
479 | if (bytes_remaining <= max_bytes) | |
480 | { | |
481 | /* Send all the data at once, with minimal handshaking. */ | |
482 | #if 0 | |
483 | fprintf (stderr,"\nStoring all %d\n", bytes_remaining); | |
484 | #endif | |
485 | XChangeProperty (display, window, reply.property, type, format, | |
486 | PropModeReplace, data, size); | |
487 | /* At this point, the selection was successfully stored; ack it. */ | |
488 | (void) XSendEvent (display, window, False, 0L, (XEvent *) &reply); | |
489 | } | |
490 | else | |
491 | { | |
492 | /* Send an INCR selection. */ | |
493 | int prop_id; | |
494 | ||
7da64e5c | 495 | if (x_window_to_frame (window)) /* #### debug */ |
ede4db72 RS |
496 | error ("attempt to transfer an INCR to ourself!"); |
497 | #if 0 | |
498 | fprintf (stderr, "\nINCR %d\n", bytes_remaining); | |
499 | #endif | |
500 | prop_id = expect_property_change (display, window, reply.property, | |
501 | PropertyDelete); | |
502 | ||
503 | XChangeProperty (display, window, reply.property, Xatom_INCR, | |
504 | 32, PropModeReplace, (unsigned char *) | |
505 | &bytes_remaining, 1); | |
506 | XSelectInput (display, window, PropertyChangeMask); | |
507 | /* Tell 'em the INCR data is there... */ | |
508 | (void) XSendEvent (display, window, False, 0L, (XEvent *) &reply); | |
509 | ||
510 | /* First, wait for the requestor to ack by deleting the property. | |
511 | This can run random lisp code (process handlers) or signal. */ | |
512 | wait_for_property_change (prop_id); | |
513 | ||
514 | while (bytes_remaining) | |
515 | { | |
516 | int i = ((bytes_remaining < max_bytes) | |
517 | ? bytes_remaining | |
518 | : max_bytes); | |
519 | prop_id = expect_property_change (display, window, reply.property, | |
520 | PropertyDelete); | |
521 | #if 0 | |
522 | fprintf (stderr," INCR adding %d\n", i); | |
523 | #endif | |
524 | /* Append the next chunk of data to the property. */ | |
525 | XChangeProperty (display, window, reply.property, type, format, | |
526 | PropModeAppend, data, i / format_bytes); | |
527 | bytes_remaining -= i; | |
528 | data += i; | |
529 | ||
530 | /* Now wait for the requestor to ack this chunk by deleting the | |
531 | property. This can run random lisp code or signal. | |
532 | */ | |
533 | wait_for_property_change (prop_id); | |
534 | } | |
535 | /* Now write a zero-length chunk to the property to tell the requestor | |
536 | that we're done. */ | |
537 | #if 0 | |
538 | fprintf (stderr," INCR done\n"); | |
539 | #endif | |
540 | if (! waiting_for_other_props_on_window (display, window)) | |
541 | XSelectInput (display, window, 0L); | |
542 | ||
543 | XChangeProperty (display, window, reply.property, type, format, | |
544 | PropModeReplace, data, 0); | |
545 | } | |
cf2d699c | 546 | XFlushQueue (); |
ede4db72 RS |
547 | UNBLOCK_INPUT; |
548 | } | |
549 | \f | |
550 | /* Handle a SelectionRequest event EVENT. | |
551 | This is called from keyboard.c when such an event is found in the queue. */ | |
552 | ||
553 | void | |
554 | x_handle_selection_request (event) | |
555 | struct input_event *event; | |
556 | { | |
557 | struct gcpro gcpro1, gcpro2, gcpro3; | |
558 | XSelectionEvent reply; | |
559 | Lisp_Object local_selection_data = Qnil; | |
560 | Lisp_Object selection_symbol; | |
561 | Lisp_Object target_symbol = Qnil; | |
562 | Lisp_Object converted_selection = Qnil; | |
563 | Time local_selection_time; | |
564 | Lisp_Object successful_p = Qnil; | |
565 | int count; | |
566 | ||
567 | GCPRO3 (local_selection_data, converted_selection, target_symbol); | |
568 | ||
569 | reply.type = SelectionNotify; /* Construct the reply event */ | |
570 | reply.display = SELECTION_EVENT_DISPLAY (event); | |
571 | reply.requestor = SELECTION_EVENT_REQUESTOR (event); | |
572 | reply.selection = SELECTION_EVENT_SELECTION (event); | |
573 | reply.time = SELECTION_EVENT_TIME (event); | |
574 | reply.target = SELECTION_EVENT_TARGET (event); | |
575 | reply.property = SELECTION_EVENT_PROPERTY (event); | |
576 | if (reply.property == None) | |
577 | reply.property = reply.target; | |
578 | ||
579 | selection_symbol = x_atom_to_symbol (reply.display, | |
580 | SELECTION_EVENT_SELECTION (event)); | |
581 | ||
582 | local_selection_data = assq_no_quit (selection_symbol, Vselection_alist); | |
583 | ||
584 | #if 0 | |
585 | # define CDR(x) (XCONS (x)->cdr) | |
586 | # define CAR(x) (XCONS (x)->car) | |
587 | /* This list isn't user-visible, so it can't "go bad." */ | |
588 | if (!CONSP (local_selection_data)) abort (); | |
589 | if (!CONSP (CDR (local_selection_data))) abort (); | |
590 | if (!CONSP (CDR (CDR (local_selection_data)))) abort (); | |
591 | if (!NILP (CDR (CDR (CDR (local_selection_data))))) abort (); | |
592 | if (!CONSP (CAR (CDR (CDR (local_selection_data))))) abort (); | |
7da64e5c RS |
593 | if (!INTEGERP (CAR (CAR (CDR (CDR (local_selection_data)))))) abort (); |
594 | if (!INTEGERP (CDR (CAR (CDR (CDR (local_selection_data)))))) abort (); | |
ede4db72 RS |
595 | # undef CAR |
596 | # undef CDR | |
597 | #endif | |
598 | ||
599 | if (NILP (local_selection_data)) | |
600 | { | |
601 | /* Someone asked for the selection, but we don't have it any more. | |
602 | */ | |
603 | x_decline_selection_request (event); | |
604 | goto DONE; | |
605 | } | |
606 | ||
607 | local_selection_time = (Time) | |
608 | cons_to_long (XCONS (XCONS (XCONS (local_selection_data)->cdr)->cdr)->car); | |
609 | ||
610 | if (SELECTION_EVENT_TIME (event) != CurrentTime | |
7da64e5c | 611 | && local_selection_time > SELECTION_EVENT_TIME (event)) |
ede4db72 RS |
612 | { |
613 | /* Someone asked for the selection, and we have one, but not the one | |
614 | they're looking for. | |
615 | */ | |
616 | x_decline_selection_request (event); | |
617 | goto DONE; | |
618 | } | |
619 | ||
620 | count = specpdl_ptr - specpdl; | |
621 | x_selection_current_request = event; | |
622 | record_unwind_protect (x_selection_request_lisp_error, Qnil); | |
623 | ||
624 | target_symbol = x_atom_to_symbol (reply.display, | |
625 | SELECTION_EVENT_TARGET (event)); | |
626 | ||
627 | #if 0 /* #### MULTIPLE doesn't work yet */ | |
628 | if (EQ (target_symbol, QMULTIPLE)) | |
629 | target_symbol = fetch_multiple_target (event); | |
630 | #endif | |
631 | ||
632 | /* Convert lisp objects back into binary data */ | |
633 | ||
634 | converted_selection | |
635 | = x_get_local_selection (selection_symbol, target_symbol); | |
636 | ||
637 | if (! NILP (converted_selection)) | |
638 | { | |
639 | unsigned char *data; | |
640 | unsigned int size; | |
641 | int format; | |
642 | Atom type; | |
643 | lisp_data_to_selection_data (reply.display, converted_selection, | |
644 | &data, &type, &size, &format); | |
645 | ||
646 | x_reply_selection_request (event, format, data, size, type); | |
647 | successful_p = Qt; | |
648 | ||
649 | /* Indicate we have successfully processed this event. */ | |
7da64e5c | 650 | x_selection_current_request = 0; |
ede4db72 RS |
651 | |
652 | xfree (data); | |
653 | } | |
654 | unbind_to (count, Qnil); | |
655 | ||
656 | DONE: | |
657 | ||
658 | UNGCPRO; | |
659 | ||
660 | /* Let random lisp code notice that the selection has been asked for. */ | |
661 | { | |
662 | Lisp_Object rest = Vx_sent_selection_hooks; | |
663 | if (!EQ (rest, Qunbound)) | |
664 | for (; CONSP (rest); rest = Fcdr (rest)) | |
665 | call3 (Fcar (rest), selection_symbol, target_symbol, successful_p); | |
666 | } | |
667 | } | |
668 | \f | |
669 | /* Handle a SelectionClear event EVENT, which indicates that some other | |
670 | client cleared out our previously asserted selection. | |
671 | This is called from keyboard.c when such an event is found in the queue. */ | |
672 | ||
673 | void | |
674 | x_handle_selection_clear (event) | |
675 | struct input_event *event; | |
676 | { | |
677 | Display *display = SELECTION_EVENT_DISPLAY (event); | |
678 | Atom selection = SELECTION_EVENT_SELECTION (event); | |
679 | Time changed_owner_time = SELECTION_EVENT_TIME (event); | |
680 | ||
681 | Lisp_Object selection_symbol, local_selection_data; | |
682 | Time local_selection_time; | |
683 | ||
684 | selection_symbol = x_atom_to_symbol (display, selection); | |
685 | ||
686 | local_selection_data = assq_no_quit (selection_symbol, Vselection_alist); | |
687 | ||
688 | /* Well, we already believe that we don't own it, so that's just fine. */ | |
689 | if (NILP (local_selection_data)) return; | |
690 | ||
691 | local_selection_time = (Time) | |
692 | cons_to_long (XCONS (XCONS (XCONS (local_selection_data)->cdr)->cdr)->car); | |
693 | ||
694 | /* This SelectionClear is for a selection that we no longer own, so we can | |
695 | disregard it. (That is, we have reasserted the selection since this | |
696 | request was generated.) */ | |
697 | ||
698 | if (changed_owner_time != CurrentTime | |
699 | && local_selection_time > changed_owner_time) | |
700 | return; | |
701 | ||
702 | /* Otherwise, we're really honest and truly being told to drop it. | |
703 | Don't use Fdelq as that may QUIT;. */ | |
704 | ||
705 | if (EQ (local_selection_data, Fcar (Vselection_alist))) | |
706 | Vselection_alist = Fcdr (Vselection_alist); | |
707 | else | |
708 | { | |
709 | Lisp_Object rest; | |
710 | for (rest = Vselection_alist; !NILP (rest); rest = Fcdr (rest)) | |
711 | if (EQ (local_selection_data, Fcar (XCONS (rest)->cdr))) | |
712 | { | |
713 | XCONS (rest)->cdr = Fcdr (XCONS (rest)->cdr); | |
714 | break; | |
715 | } | |
716 | } | |
717 | ||
718 | /* Let random lisp code notice that the selection has been stolen. */ | |
719 | ||
720 | { | |
721 | Lisp_Object rest = Vx_lost_selection_hooks; | |
722 | if (!EQ (rest, Qunbound)) | |
723 | for (; CONSP (rest); rest = Fcdr (rest)) | |
724 | call1 (Fcar (rest), selection_symbol); | |
725 | } | |
726 | } | |
727 | ||
728 | \f | |
729 | /* This stuff is so that INCR selections are reentrant (that is, so we can | |
730 | be servicing multiple INCR selection requests simultaneously.) I haven't | |
731 | actually tested that yet. */ | |
732 | ||
733 | static int prop_location_tick; | |
734 | ||
735 | static Lisp_Object property_change_reply; | |
736 | static int property_change_reply_tick; | |
737 | ||
738 | /* Keep a list of the property changes that are awaited. */ | |
739 | ||
740 | struct prop_location | |
741 | { | |
742 | int tick; | |
743 | Display *display; | |
744 | Window window; | |
745 | Atom property; | |
746 | int desired_state; | |
747 | struct prop_location *next; | |
748 | }; | |
749 | ||
750 | static struct prop_location *property_change_wait_list; | |
751 | ||
752 | static int | |
753 | property_deleted_p (tick) | |
754 | void *tick; | |
755 | { | |
756 | struct prop_location *rest = property_change_wait_list; | |
757 | while (rest) | |
758 | if (rest->tick == (int) tick) | |
759 | return 0; | |
760 | else | |
761 | rest = rest->next; | |
762 | return 1; | |
763 | } | |
764 | ||
765 | /* Nonzero if any properties for DISPLAY and WINDOW | |
766 | are on the list of what we are waiting for. */ | |
767 | ||
768 | static int | |
769 | waiting_for_other_props_on_window (display, window) | |
770 | Display *display; | |
771 | Window window; | |
772 | { | |
773 | struct prop_location *rest = property_change_wait_list; | |
774 | while (rest) | |
775 | if (rest->display == display && rest->window == window) | |
776 | return 1; | |
777 | else | |
778 | rest = rest->next; | |
779 | return 0; | |
780 | } | |
781 | ||
782 | /* Add an entry to the list of property changes we are waiting for. | |
783 | DISPLAY, WINDOW, PROPERTY, STATE describe what we will wait for. | |
784 | The return value is a number that uniquely identifies | |
785 | this awaited property change. */ | |
786 | ||
787 | static int | |
788 | expect_property_change (display, window, property, state) | |
789 | Display *display; | |
790 | Window window; | |
791 | Lisp_Object property; | |
792 | int state; | |
793 | { | |
794 | struct prop_location *pl | |
795 | = (struct prop_location *) xmalloc (sizeof (struct prop_location)); | |
796 | pl->tick = ++prop_location_tick; | |
797 | pl->display = display; | |
798 | pl->window = window; | |
799 | pl->property = property; | |
800 | pl->desired_state = state; | |
801 | pl->next = property_change_wait_list; | |
802 | property_change_wait_list = pl; | |
803 | return pl->tick; | |
804 | } | |
805 | ||
806 | /* Delete an entry from the list of property changes we are waiting for. | |
807 | TICK is the number that uniquely identifies the entry. */ | |
808 | ||
809 | static void | |
810 | unexpect_property_change (tick) | |
811 | int tick; | |
812 | { | |
813 | struct prop_location *prev = 0, *rest = property_change_wait_list; | |
814 | while (rest) | |
815 | { | |
816 | if (rest->tick == tick) | |
817 | { | |
818 | if (prev) | |
819 | prev->next = rest->next; | |
820 | else | |
821 | property_change_wait_list = rest->next; | |
822 | xfree (rest); | |
823 | return; | |
824 | } | |
825 | prev = rest; | |
826 | rest = rest->next; | |
827 | } | |
828 | } | |
829 | ||
830 | /* Actually wait for a property change. | |
831 | TICK should be the value that expect_property_change returned. */ | |
832 | ||
833 | static void | |
834 | wait_for_property_change (tick) | |
835 | { | |
836 | XCONS (property_change_reply)->car = Qnil; | |
837 | property_change_reply_tick = tick; | |
838 | wait_reading_process_input (0, 0, property_change_reply, 0); | |
839 | } | |
840 | ||
841 | /* Called from XTread_socket in response to a PropertyNotify event. */ | |
842 | ||
843 | void | |
844 | x_handle_property_notify (event) | |
845 | XPropertyEvent *event; | |
846 | { | |
847 | struct prop_location *prev = 0, *rest = property_change_wait_list; | |
848 | while (rest) | |
849 | { | |
850 | if (rest->property == event->atom | |
851 | && rest->window == event->window | |
852 | && rest->display == event->display | |
853 | && rest->desired_state == event->state) | |
854 | { | |
855 | #if 0 | |
856 | fprintf (stderr, "Saw expected prop-%s on %s\n", | |
857 | (event->state == PropertyDelete ? "delete" : "change"), | |
858 | (char *) XSYMBOL (x_atom_to_symbol (event->display, | |
859 | event->atom)) | |
860 | ->name->data); | |
861 | #endif | |
862 | ||
863 | /* If this is the one wait_for_property_change is waiting for, | |
864 | tell it to wake up. */ | |
865 | if (rest->tick == property_change_reply_tick) | |
866 | XCONS (property_change_reply)->car = Qt; | |
867 | ||
868 | if (prev) | |
869 | prev->next = rest->next; | |
870 | else | |
871 | property_change_wait_list = rest->next; | |
872 | xfree (rest); | |
873 | return; | |
874 | } | |
875 | prev = rest; | |
876 | rest = rest->next; | |
877 | } | |
878 | #if 0 | |
879 | fprintf (stderr, "Saw UNexpected prop-%s on %s\n", | |
880 | (event->state == PropertyDelete ? "delete" : "change"), | |
881 | (char *) XSYMBOL (x_atom_to_symbol (event->display, event->atom)) | |
882 | ->name->data); | |
883 | #endif | |
884 | } | |
885 | ||
886 | ||
887 | \f | |
888 | #if 0 /* #### MULTIPLE doesn't work yet */ | |
889 | ||
890 | static Lisp_Object | |
891 | fetch_multiple_target (event) | |
892 | XSelectionRequestEvent *event; | |
893 | { | |
894 | Display *display = event->display; | |
895 | Window window = event->requestor; | |
896 | Atom target = event->target; | |
897 | Atom selection_atom = event->selection; | |
898 | int result; | |
899 | ||
900 | return | |
901 | Fcons (QMULTIPLE, | |
902 | x_get_window_property_as_lisp_data (display, window, target, | |
903 | QMULTIPLE, selection_atom)); | |
904 | } | |
905 | ||
906 | static Lisp_Object | |
907 | copy_multiple_data (obj) | |
908 | Lisp_Object obj; | |
909 | { | |
910 | Lisp_Object vec; | |
911 | int i; | |
912 | int size; | |
913 | if (CONSP (obj)) | |
914 | return Fcons (XCONS (obj)->car, copy_multiple_data (XCONS (obj)->cdr)); | |
915 | ||
916 | CHECK_VECTOR (obj, 0); | |
917 | vec = Fmake_vector (size = XVECTOR (obj)->size, Qnil); | |
918 | for (i = 0; i < size; i++) | |
919 | { | |
920 | Lisp_Object vec2 = XVECTOR (obj)->contents [i]; | |
921 | CHECK_VECTOR (vec2, 0); | |
922 | if (XVECTOR (vec2)->size != 2) | |
923 | /* ??? Confusing error message */ | |
924 | Fsignal (Qerror, Fcons (build_string ("vectors must be of length 2"), | |
925 | Fcons (vec2, Qnil))); | |
926 | XVECTOR (vec)->contents [i] = Fmake_vector (2, Qnil); | |
927 | XVECTOR (XVECTOR (vec)->contents [i])->contents [0] | |
928 | = XVECTOR (vec2)->contents [0]; | |
929 | XVECTOR (XVECTOR (vec)->contents [i])->contents [1] | |
930 | = XVECTOR (vec2)->contents [1]; | |
931 | } | |
932 | return vec; | |
933 | } | |
934 | ||
935 | #endif | |
936 | ||
937 | \f | |
938 | /* Variables for communication with x_handle_selection_notify. */ | |
939 | static Atom reading_which_selection; | |
940 | static Lisp_Object reading_selection_reply; | |
941 | static Window reading_selection_window; | |
942 | ||
943 | /* Do protocol to read selection-data from the server. | |
944 | Converts this to Lisp data and returns it. */ | |
945 | ||
946 | static Lisp_Object | |
947 | x_get_foreign_selection (selection_symbol, target_type) | |
948 | Lisp_Object selection_symbol, target_type; | |
949 | { | |
950 | Display *display = x_current_display; | |
951 | #ifdef X_TOOLKIT | |
7da64e5c | 952 | Window requestor_window = XtWindow (selected_screen->display.x->edit_widget); |
ede4db72 | 953 | #else |
7da64e5c | 954 | Window requestor_window = FRAME_X_WINDOW (selected_frame); |
ede4db72 | 955 | #endif |
7da64e5c | 956 | Time requestor_time = last_event_timestamp; |
ede4db72 RS |
957 | Atom target_property = Xatom_EMACS_TMP; |
958 | Atom selection_atom = symbol_to_x_atom (display, selection_symbol); | |
959 | Atom type_atom; | |
80da0190 | 960 | int secs, usecs; |
ede4db72 RS |
961 | |
962 | if (CONSP (target_type)) | |
963 | type_atom = symbol_to_x_atom (display, XCONS (target_type)->car); | |
964 | else | |
965 | type_atom = symbol_to_x_atom (display, target_type); | |
966 | ||
967 | BLOCK_INPUT; | |
968 | XConvertSelection (display, selection_atom, type_atom, target_property, | |
969 | requestor_window, requestor_time); | |
a87ed99c | 970 | XFlushQueue (); |
ede4db72 RS |
971 | |
972 | /* Prepare to block until the reply has been read. */ | |
973 | reading_selection_window = requestor_window; | |
974 | reading_which_selection = selection_atom; | |
975 | XCONS (reading_selection_reply)->car = Qnil; | |
976 | UNBLOCK_INPUT; | |
977 | ||
80da0190 RS |
978 | /* This allows quits. Also, don't wait forever. */ |
979 | secs = x_selection_timeout / 1000; | |
980 | usecs = (x_selection_timeout % 1000) * 1000; | |
981 | wait_reading_process_input (secs, usecs, reading_selection_reply, 0); | |
ede4db72 RS |
982 | |
983 | if (NILP (XCONS (reading_selection_reply)->car)) | |
984 | error ("timed out waiting for reply from selection owner"); | |
985 | ||
986 | /* Otherwise, the selection is waiting for us on the requested property. */ | |
987 | return | |
988 | x_get_window_property_as_lisp_data (display, requestor_window, | |
989 | target_property, target_type, | |
990 | selection_atom); | |
991 | } | |
992 | \f | |
993 | /* Subroutines of x_get_window_property_as_lisp_data */ | |
994 | ||
995 | static void | |
996 | x_get_window_property (display, window, property, data_ret, bytes_ret, | |
997 | actual_type_ret, actual_format_ret, actual_size_ret, | |
998 | delete_p) | |
999 | Display *display; | |
1000 | Window window; | |
1001 | Atom property; | |
1002 | unsigned char **data_ret; | |
1003 | int *bytes_ret; | |
1004 | Atom *actual_type_ret; | |
1005 | int *actual_format_ret; | |
1006 | unsigned long *actual_size_ret; | |
1007 | int delete_p; | |
1008 | { | |
1009 | int total_size; | |
1010 | unsigned long bytes_remaining; | |
1011 | int offset = 0; | |
1012 | unsigned char *tmp_data = 0; | |
1013 | int result; | |
1014 | int buffer_size = SELECTION_QUANTUM (display); | |
1015 | if (buffer_size > MAX_SELECTION_QUANTUM) buffer_size = MAX_SELECTION_QUANTUM; | |
1016 | ||
1017 | BLOCK_INPUT; | |
1018 | /* First probe the thing to find out how big it is. */ | |
1019 | result = XGetWindowProperty (display, window, property, | |
1020 | 0, 0, False, AnyPropertyType, | |
1021 | actual_type_ret, actual_format_ret, | |
1022 | actual_size_ret, | |
1023 | &bytes_remaining, &tmp_data); | |
1024 | UNBLOCK_INPUT; | |
1025 | if (result != Success) | |
1026 | { | |
1027 | *data_ret = 0; | |
1028 | *bytes_ret = 0; | |
1029 | return; | |
1030 | } | |
1031 | BLOCK_INPUT; | |
1032 | XFree ((char *) tmp_data); | |
1033 | UNBLOCK_INPUT; | |
1034 | ||
1035 | if (*actual_type_ret == None || *actual_format_ret == 0) | |
1036 | { | |
1037 | if (delete_p) XDeleteProperty (display, window, property); | |
1038 | return; | |
1039 | } | |
1040 | ||
1041 | total_size = bytes_remaining + 1; | |
1042 | *data_ret = (unsigned char *) xmalloc (total_size); | |
1043 | ||
1044 | /* Now read, until weve gotten it all. */ | |
1045 | BLOCK_INPUT; | |
1046 | while (bytes_remaining) | |
1047 | { | |
1048 | #if 0 | |
1049 | int last = bytes_remaining; | |
1050 | #endif | |
1051 | result | |
1052 | = XGetWindowProperty (display, window, property, | |
1053 | offset/4, buffer_size/4, | |
1054 | (delete_p ? True : False), | |
1055 | AnyPropertyType, | |
1056 | actual_type_ret, actual_format_ret, | |
1057 | actual_size_ret, &bytes_remaining, &tmp_data); | |
1058 | #if 0 | |
1059 | fprintf (stderr, "<< read %d\n", last-bytes_remaining); | |
1060 | #endif | |
1061 | /* If this doesn't return Success at this point, it means that | |
1062 | some clod deleted the selection while we were in the midst of | |
1063 | reading it. Deal with that, I guess.... | |
1064 | */ | |
1065 | if (result != Success) break; | |
1066 | *actual_size_ret *= *actual_format_ret / 8; | |
1067 | bcopy (tmp_data, (*data_ret) + offset, *actual_size_ret); | |
1068 | offset += *actual_size_ret; | |
1069 | XFree ((char *) tmp_data); | |
1070 | } | |
1071 | UNBLOCK_INPUT; | |
1072 | *bytes_ret = offset; | |
1073 | } | |
1074 | \f | |
1075 | static void | |
1076 | receive_incremental_selection (display, window, property, target_type, | |
1077 | min_size_bytes, data_ret, size_bytes_ret, | |
1078 | type_ret, format_ret, size_ret) | |
1079 | Display *display; | |
1080 | Window window; | |
1081 | Atom property; | |
1082 | Lisp_Object target_type; /* for error messages only */ | |
1083 | unsigned int min_size_bytes; | |
1084 | unsigned char **data_ret; | |
1085 | int *size_bytes_ret; | |
1086 | Atom *type_ret; | |
1087 | unsigned long *size_ret; | |
1088 | int *format_ret; | |
1089 | { | |
1090 | int offset = 0; | |
1091 | int prop_id; | |
1092 | *size_bytes_ret = min_size_bytes; | |
1093 | *data_ret = (unsigned char *) xmalloc (*size_bytes_ret); | |
1094 | #if 0 | |
1095 | fprintf (stderr, "\nread INCR %d\n", min_size_bytes); | |
1096 | #endif | |
1097 | /* At this point, we have read an INCR property, and deleted it (which | |
1098 | is how we ack its receipt: the sending window will be selecting | |
1099 | PropertyNotify events on our window to notice this.) | |
1100 | ||
1101 | Now, we must loop, waiting for the sending window to put a value on | |
1102 | that property, then reading the property, then deleting it to ack. | |
1103 | We are done when the sender places a property of length 0. | |
1104 | */ | |
1105 | prop_id = expect_property_change (display, window, property, | |
1106 | PropertyNewValue); | |
1107 | while (1) | |
1108 | { | |
1109 | unsigned char *tmp_data; | |
1110 | int tmp_size_bytes; | |
1111 | wait_for_property_change (prop_id); | |
1112 | /* expect it again immediately, because x_get_window_property may | |
1113 | .. no it wont, I dont get it. | |
1114 | .. Ok, I get it now, the Xt code that implements INCR is broken. | |
1115 | */ | |
1116 | prop_id = expect_property_change (display, window, property, | |
1117 | PropertyNewValue); | |
1118 | x_get_window_property (display, window, property, | |
1119 | &tmp_data, &tmp_size_bytes, | |
1120 | type_ret, format_ret, size_ret, 1); | |
1121 | ||
1122 | if (tmp_size_bytes == 0) /* we're done */ | |
1123 | { | |
1124 | #if 0 | |
1125 | fprintf (stderr, " read INCR done\n"); | |
1126 | #endif | |
1127 | unexpect_property_change (prop_id); | |
1128 | if (tmp_data) xfree (tmp_data); | |
1129 | break; | |
1130 | } | |
1131 | #if 0 | |
1132 | fprintf (stderr, " read INCR %d\n", tmp_size_bytes); | |
1133 | #endif | |
1134 | if (*size_bytes_ret < offset + tmp_size_bytes) | |
1135 | { | |
1136 | #if 0 | |
1137 | fprintf (stderr, " read INCR realloc %d -> %d\n", | |
1138 | *size_bytes_ret, offset + tmp_size_bytes); | |
1139 | #endif | |
1140 | *size_bytes_ret = offset + tmp_size_bytes; | |
1141 | *data_ret = (unsigned char *) xrealloc (*data_ret, *size_bytes_ret); | |
1142 | } | |
1143 | memcpy ((*data_ret) + offset, tmp_data, tmp_size_bytes); | |
1144 | offset += tmp_size_bytes; | |
1145 | xfree (tmp_data); | |
1146 | } | |
1147 | } | |
1148 | \f | |
1149 | /* Once a requested selection is "ready" (we got a SelectionNotify event), | |
1150 | fetch value from property PROPERTY of X window WINDOW on display DISPLAY. | |
1151 | TARGET_TYPE and SELECTION_ATOM are used in error message if this fails. */ | |
1152 | ||
1153 | static Lisp_Object | |
1154 | x_get_window_property_as_lisp_data (display, window, property, target_type, | |
1155 | selection_atom) | |
1156 | Display *display; | |
1157 | Window window; | |
1158 | Atom property; | |
1159 | Lisp_Object target_type; /* for error messages only */ | |
1160 | Atom selection_atom; /* for error messages only */ | |
1161 | { | |
1162 | Atom actual_type; | |
1163 | int actual_format; | |
1164 | unsigned long actual_size; | |
1165 | unsigned char *data = 0; | |
1166 | int bytes = 0; | |
1167 | Lisp_Object val; | |
1168 | ||
1169 | x_get_window_property (display, window, property, &data, &bytes, | |
1170 | &actual_type, &actual_format, &actual_size, 1); | |
1171 | if (! data) | |
1172 | { | |
1173 | int there_is_a_selection_owner; | |
1174 | BLOCK_INPUT; | |
1175 | there_is_a_selection_owner | |
1176 | = XGetSelectionOwner (display, selection_atom); | |
1177 | UNBLOCK_INPUT; | |
1178 | while (1) /* Note debugger can no longer return, so this is obsolete */ | |
1179 | Fsignal (Qerror, | |
1180 | there_is_a_selection_owner ? | |
1181 | Fcons (build_string ("selection owner couldn't convert"), | |
1182 | actual_type | |
1183 | ? Fcons (target_type, | |
1184 | Fcons (x_atom_to_symbol (display, actual_type), | |
1185 | Qnil)) | |
1186 | : Fcons (target_type, Qnil)) | |
1187 | : Fcons (build_string ("no selection"), | |
1188 | Fcons (x_atom_to_symbol (display, selection_atom), | |
1189 | Qnil))); | |
1190 | } | |
1191 | ||
1192 | if (actual_type == Xatom_INCR) | |
1193 | { | |
1194 | /* That wasn't really the data, just the beginning. */ | |
1195 | ||
1196 | unsigned int min_size_bytes = * ((unsigned int *) data); | |
1197 | BLOCK_INPUT; | |
1198 | XFree ((char *) data); | |
1199 | UNBLOCK_INPUT; | |
1200 | receive_incremental_selection (display, window, property, target_type, | |
1201 | min_size_bytes, &data, &bytes, | |
1202 | &actual_type, &actual_format, | |
1203 | &actual_size); | |
1204 | } | |
1205 | ||
1206 | /* It's been read. Now convert it to a lisp object in some semi-rational | |
1207 | manner. */ | |
1208 | val = selection_data_to_lisp_data (display, data, bytes, | |
1209 | actual_type, actual_format); | |
1210 | ||
1211 | xfree ((char *) data); | |
1212 | return val; | |
1213 | } | |
1214 | \f | |
1215 | /* These functions convert from the selection data read from the server into | |
1216 | something that we can use from Lisp, and vice versa. | |
1217 | ||
1218 | Type: Format: Size: Lisp Type: | |
1219 | ----- ------- ----- ----------- | |
1220 | * 8 * String | |
1221 | ATOM 32 1 Symbol | |
1222 | ATOM 32 > 1 Vector of Symbols | |
1223 | * 16 1 Integer | |
1224 | * 16 > 1 Vector of Integers | |
1225 | * 32 1 if <=16 bits: Integer | |
1226 | if > 16 bits: Cons of top16, bot16 | |
1227 | * 32 > 1 Vector of the above | |
1228 | ||
1229 | When converting a Lisp number to C, it is assumed to be of format 16 if | |
1230 | it is an integer, and of format 32 if it is a cons of two integers. | |
1231 | ||
1232 | When converting a vector of numbers from Lisp to C, it is assumed to be | |
1233 | of format 16 if every element in the vector is an integer, and is assumed | |
1234 | to be of format 32 if any element is a cons of two integers. | |
1235 | ||
1236 | When converting an object to C, it may be of the form (SYMBOL . <data>) | |
1237 | where SYMBOL is what we should claim that the type is. Format and | |
1238 | representation are as above. */ | |
1239 | ||
1240 | ||
1241 | ||
1242 | static Lisp_Object | |
1243 | selection_data_to_lisp_data (display, data, size, type, format) | |
1244 | Display *display; | |
1245 | unsigned char *data; | |
1246 | Atom type; | |
1247 | int size, format; | |
1248 | { | |
1249 | ||
1250 | if (type == Xatom_NULL) | |
1251 | return QNULL; | |
1252 | ||
1253 | /* Convert any 8-bit data to a string, for compactness. */ | |
1254 | else if (format == 8) | |
1255 | return make_string ((char *) data, size); | |
1256 | ||
1257 | /* Convert a single atom to a Lisp_Symbol. Convert a set of atoms to | |
1258 | a vector of symbols. | |
1259 | */ | |
1260 | else if (type == XA_ATOM) | |
1261 | { | |
1262 | int i; | |
1263 | if (size == sizeof (Atom)) | |
1264 | return x_atom_to_symbol (display, *((Atom *) data)); | |
1265 | else | |
1266 | { | |
1267 | Lisp_Object v = Fmake_vector (size / sizeof (Atom), 0); | |
1268 | for (i = 0; i < size / sizeof (Atom); i++) | |
1269 | Faset (v, i, x_atom_to_symbol (display, ((Atom *) data) [i])); | |
1270 | return v; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | /* Convert a single 16 or small 32 bit number to a Lisp_Int. | |
1275 | If the number is > 16 bits, convert it to a cons of integers, | |
1276 | 16 bits in each half. | |
1277 | */ | |
1278 | else if (format == 32 && size == sizeof (long)) | |
1279 | return long_to_cons (((unsigned long *) data) [0]); | |
1280 | else if (format == 16 && size == sizeof (short)) | |
1281 | return make_number ((int) (((unsigned short *) data) [0])); | |
1282 | ||
1283 | /* Convert any other kind of data to a vector of numbers, represented | |
1284 | as above (as an integer, or a cons of two 16 bit integers.) | |
1285 | */ | |
1286 | else if (format == 16) | |
1287 | { | |
1288 | int i; | |
1289 | Lisp_Object v = Fmake_vector (size / 4, 0); | |
1290 | for (i = 0; i < size / 4; i++) | |
1291 | { | |
1292 | int j = (int) ((unsigned short *) data) [i]; | |
1293 | Faset (v, i, make_number (j)); | |
1294 | } | |
1295 | return v; | |
1296 | } | |
1297 | else | |
1298 | { | |
1299 | int i; | |
1300 | Lisp_Object v = Fmake_vector (size / 4, 0); | |
1301 | for (i = 0; i < size / 4; i++) | |
1302 | { | |
1303 | unsigned long j = ((unsigned long *) data) [i]; | |
1304 | Faset (v, i, long_to_cons (j)); | |
1305 | } | |
1306 | return v; | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | ||
1311 | static void | |
1312 | lisp_data_to_selection_data (display, obj, | |
1313 | data_ret, type_ret, size_ret, format_ret) | |
1314 | Display *display; | |
1315 | Lisp_Object obj; | |
1316 | unsigned char **data_ret; | |
1317 | Atom *type_ret; | |
1318 | unsigned int *size_ret; | |
1319 | int *format_ret; | |
1320 | { | |
1321 | Lisp_Object type = Qnil; | |
1322 | if (CONSP (obj) && SYMBOLP (XCONS (obj)->car)) | |
1323 | { | |
1324 | type = XCONS (obj)->car; | |
1325 | obj = XCONS (obj)->cdr; | |
1326 | if (CONSP (obj) && NILP (XCONS (obj)->cdr)) | |
1327 | obj = XCONS (obj)->car; | |
1328 | } | |
1329 | ||
1330 | if (EQ (obj, QNULL) || (EQ (type, QNULL))) | |
1331 | { /* This is not the same as declining */ | |
1332 | *format_ret = 32; | |
1333 | *size_ret = 0; | |
1334 | *data_ret = 0; | |
1335 | type = QNULL; | |
1336 | } | |
1337 | else if (STRINGP (obj)) | |
1338 | { | |
1339 | *format_ret = 8; | |
1340 | *size_ret = XSTRING (obj)->size; | |
1341 | *data_ret = (unsigned char *) xmalloc (*size_ret); | |
1342 | memcpy (*data_ret, (char *) XSTRING (obj)->data, *size_ret); | |
1343 | if (NILP (type)) type = QSTRING; | |
1344 | } | |
1345 | else if (SYMBOLP (obj)) | |
1346 | { | |
1347 | *format_ret = 32; | |
1348 | *size_ret = 1; | |
1349 | *data_ret = (unsigned char *) xmalloc (sizeof (Atom) + 1); | |
1350 | (*data_ret) [sizeof (Atom)] = 0; | |
1351 | (*(Atom **) data_ret) [0] = symbol_to_x_atom (display, obj); | |
1352 | if (NILP (type)) type = QATOM; | |
1353 | } | |
7da64e5c | 1354 | else if (INTEGERP (obj) |
ede4db72 RS |
1355 | && XINT (obj) < 0xFFFF |
1356 | && XINT (obj) > -0xFFFF) | |
1357 | { | |
1358 | *format_ret = 16; | |
1359 | *size_ret = 1; | |
1360 | *data_ret = (unsigned char *) xmalloc (sizeof (short) + 1); | |
1361 | (*data_ret) [sizeof (short)] = 0; | |
1362 | (*(short **) data_ret) [0] = (short) XINT (obj); | |
1363 | if (NILP (type)) type = QINTEGER; | |
1364 | } | |
a87ed99c RS |
1365 | else if (INTEGERP (obj) |
1366 | || (CONSP (obj) && INTEGERP (XCONS (obj)->car) | |
1367 | && (INTEGERP (XCONS (obj)->cdr) | |
1368 | || (CONSP (XCONS (obj)->cdr) | |
1369 | && INTEGERP (XCONS (XCONS (obj)->cdr)->car))))) | |
ede4db72 RS |
1370 | { |
1371 | *format_ret = 32; | |
1372 | *size_ret = 1; | |
1373 | *data_ret = (unsigned char *) xmalloc (sizeof (long) + 1); | |
1374 | (*data_ret) [sizeof (long)] = 0; | |
1375 | (*(unsigned long **) data_ret) [0] = cons_to_long (obj); | |
1376 | if (NILP (type)) type = QINTEGER; | |
1377 | } | |
1378 | else if (VECTORP (obj)) | |
1379 | { | |
1380 | /* Lisp_Vectors may represent a set of ATOMs; | |
1381 | a set of 16 or 32 bit INTEGERs; | |
1382 | or a set of ATOM_PAIRs (represented as [[A1 A2] [A3 A4] ...] | |
1383 | */ | |
1384 | int i; | |
1385 | ||
1386 | if (SYMBOLP (XVECTOR (obj)->contents [0])) | |
1387 | /* This vector is an ATOM set */ | |
1388 | { | |
1389 | if (NILP (type)) type = QATOM; | |
1390 | *size_ret = XVECTOR (obj)->size; | |
1391 | *format_ret = 32; | |
1392 | *data_ret = (unsigned char *) xmalloc ((*size_ret) * sizeof (Atom)); | |
1393 | for (i = 0; i < *size_ret; i++) | |
1394 | if (SYMBOLP (XVECTOR (obj)->contents [i])) | |
1395 | (*(Atom **) data_ret) [i] | |
1396 | = symbol_to_x_atom (display, XVECTOR (obj)->contents [i]); | |
1397 | else | |
1398 | Fsignal (Qerror, /* Qselection_error */ | |
1399 | Fcons (build_string | |
1400 | ("all elements of selection vector must have same type"), | |
1401 | Fcons (obj, Qnil))); | |
1402 | } | |
1403 | #if 0 /* #### MULTIPLE doesn't work yet */ | |
1404 | else if (VECTORP (XVECTOR (obj)->contents [0])) | |
1405 | /* This vector is an ATOM_PAIR set */ | |
1406 | { | |
1407 | if (NILP (type)) type = QATOM_PAIR; | |
1408 | *size_ret = XVECTOR (obj)->size; | |
1409 | *format_ret = 32; | |
1410 | *data_ret = (unsigned char *) | |
1411 | xmalloc ((*size_ret) * sizeof (Atom) * 2); | |
1412 | for (i = 0; i < *size_ret; i++) | |
1413 | if (VECTORP (XVECTOR (obj)->contents [i])) | |
1414 | { | |
1415 | Lisp_Object pair = XVECTOR (obj)->contents [i]; | |
1416 | if (XVECTOR (pair)->size != 2) | |
1417 | Fsignal (Qerror, | |
1418 | Fcons (build_string | |
1419 | ("elements of the vector must be vectors of exactly two elements"), | |
1420 | Fcons (pair, Qnil))); | |
1421 | ||
1422 | (*(Atom **) data_ret) [i * 2] | |
1423 | = symbol_to_x_atom (display, XVECTOR (pair)->contents [0]); | |
1424 | (*(Atom **) data_ret) [(i * 2) + 1] | |
1425 | = symbol_to_x_atom (display, XVECTOR (pair)->contents [1]); | |
1426 | } | |
1427 | else | |
1428 | Fsignal (Qerror, | |
1429 | Fcons (build_string | |
1430 | ("all elements of the vector must be of the same type"), | |
1431 | Fcons (obj, Qnil))); | |
1432 | ||
1433 | } | |
1434 | #endif | |
1435 | else | |
1436 | /* This vector is an INTEGER set, or something like it */ | |
1437 | { | |
1438 | *size_ret = XVECTOR (obj)->size; | |
1439 | if (NILP (type)) type = QINTEGER; | |
1440 | *format_ret = 16; | |
1441 | for (i = 0; i < *size_ret; i++) | |
1442 | if (CONSP (XVECTOR (obj)->contents [i])) | |
1443 | *format_ret = 32; | |
7da64e5c | 1444 | else if (!INTEGERP (XVECTOR (obj)->contents [i])) |
ede4db72 RS |
1445 | Fsignal (Qerror, /* Qselection_error */ |
1446 | Fcons (build_string | |
1447 | ("elements of selection vector must be integers or conses of integers"), | |
1448 | Fcons (obj, Qnil))); | |
1449 | ||
1450 | *data_ret = (unsigned char *) xmalloc (*size_ret * (*format_ret/8)); | |
1451 | for (i = 0; i < *size_ret; i++) | |
1452 | if (*format_ret == 32) | |
1453 | (*((unsigned long **) data_ret)) [i] | |
1454 | = cons_to_long (XVECTOR (obj)->contents [i]); | |
1455 | else | |
1456 | (*((unsigned short **) data_ret)) [i] | |
1457 | = (unsigned short) cons_to_long (XVECTOR (obj)->contents [i]); | |
1458 | } | |
1459 | } | |
1460 | else | |
1461 | Fsignal (Qerror, /* Qselection_error */ | |
1462 | Fcons (build_string ("unrecognised selection data"), | |
1463 | Fcons (obj, Qnil))); | |
1464 | ||
1465 | *type_ret = symbol_to_x_atom (display, type); | |
1466 | } | |
1467 | ||
1468 | static Lisp_Object | |
1469 | clean_local_selection_data (obj) | |
1470 | Lisp_Object obj; | |
1471 | { | |
1472 | if (CONSP (obj) | |
7da64e5c | 1473 | && INTEGERP (XCONS (obj)->car) |
ede4db72 | 1474 | && CONSP (XCONS (obj)->cdr) |
7da64e5c | 1475 | && INTEGERP (XCONS (XCONS (obj)->cdr)->car) |
ede4db72 RS |
1476 | && NILP (XCONS (XCONS (obj)->cdr)->cdr)) |
1477 | obj = Fcons (XCONS (obj)->car, XCONS (obj)->cdr); | |
1478 | ||
1479 | if (CONSP (obj) | |
7da64e5c RS |
1480 | && INTEGERP (XCONS (obj)->car) |
1481 | && INTEGERP (XCONS (obj)->cdr)) | |
ede4db72 RS |
1482 | { |
1483 | if (XINT (XCONS (obj)->car) == 0) | |
1484 | return XCONS (obj)->cdr; | |
1485 | if (XINT (XCONS (obj)->car) == -1) | |
1486 | return make_number (- XINT (XCONS (obj)->cdr)); | |
1487 | } | |
1488 | if (VECTORP (obj)) | |
1489 | { | |
1490 | int i; | |
1491 | int size = XVECTOR (obj)->size; | |
1492 | Lisp_Object copy; | |
1493 | if (size == 1) | |
1494 | return clean_local_selection_data (XVECTOR (obj)->contents [0]); | |
1495 | copy = Fmake_vector (size, Qnil); | |
1496 | for (i = 0; i < size; i++) | |
1497 | XVECTOR (copy)->contents [i] | |
1498 | = clean_local_selection_data (XVECTOR (obj)->contents [i]); | |
1499 | return copy; | |
1500 | } | |
1501 | return obj; | |
1502 | } | |
1503 | \f | |
1504 | /* Called from XTread_socket to handle SelectionNotify events. | |
1505 | If it's the selection we are waiting for, stop waiting. */ | |
1506 | ||
1507 | void | |
1508 | x_handle_selection_notify (event) | |
1509 | XSelectionEvent *event; | |
1510 | { | |
1511 | if (event->requestor != reading_selection_window) | |
1512 | return; | |
1513 | if (event->selection != reading_which_selection) | |
1514 | return; | |
1515 | ||
1516 | XCONS (reading_selection_reply)->car = Qt; | |
1517 | } | |
1518 | ||
1519 | \f | |
1520 | DEFUN ("x-own-selection-internal", | |
1521 | Fx_own_selection_internal, Sx_own_selection_internal, | |
1522 | 2, 2, 0, | |
1523 | "Assert an X selection of the given TYPE with the given VALUE.\n\ | |
1524 | TYPE is a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\ | |
1525 | \(Those are literal upper-case symbol names, since that's what X expects.)\n\ | |
1526 | VALUE is typically a string, or a cons of two markers, but may be\n\ | |
a87ed99c | 1527 | anything that the functions on `selection-converter-alist' know about.") |
ede4db72 RS |
1528 | (selection_name, selection_value) |
1529 | Lisp_Object selection_name, selection_value; | |
1530 | { | |
1531 | CHECK_SYMBOL (selection_name, 0); | |
1532 | if (NILP (selection_value)) error ("selection-value may not be nil."); | |
1533 | x_own_selection (selection_name, selection_value); | |
1534 | return selection_value; | |
1535 | } | |
1536 | ||
1537 | ||
1538 | /* Request the selection value from the owner. If we are the owner, | |
1539 | simply return our selection value. If we are not the owner, this | |
1540 | will block until all of the data has arrived. */ | |
1541 | ||
1542 | DEFUN ("x-get-selection-internal", | |
1543 | Fx_get_selection_internal, Sx_get_selection_internal, 2, 2, 0, | |
1544 | "Return text selected from some X window.\n\ | |
1545 | SELECTION is a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\ | |
1546 | \(Those are literal upper-case symbol names, since that's what X expects.)\n\ | |
a87ed99c | 1547 | TYPE is the type of data desired, typically `STRING'.") |
ede4db72 RS |
1548 | (selection_symbol, target_type) |
1549 | Lisp_Object selection_symbol, target_type; | |
1550 | { | |
1551 | Lisp_Object val = Qnil; | |
1552 | struct gcpro gcpro1, gcpro2; | |
1553 | GCPRO2 (target_type, val); /* we store newly consed data into these */ | |
1554 | CHECK_SYMBOL (selection_symbol, 0); | |
1555 | ||
1556 | #if 0 /* #### MULTIPLE doesn't work yet */ | |
1557 | if (CONSP (target_type) | |
1558 | && XCONS (target_type)->car == QMULTIPLE) | |
1559 | { | |
1560 | CHECK_VECTOR (XCONS (target_type)->cdr, 0); | |
1561 | /* So we don't destructively modify this... */ | |
1562 | target_type = copy_multiple_data (target_type); | |
1563 | } | |
1564 | else | |
1565 | #endif | |
1566 | CHECK_SYMBOL (target_type, 0); | |
1567 | ||
1568 | val = x_get_local_selection (selection_symbol, target_type); | |
1569 | ||
1570 | if (NILP (val)) | |
1571 | { | |
1572 | val = x_get_foreign_selection (selection_symbol, target_type); | |
1573 | goto DONE; | |
1574 | } | |
1575 | ||
1576 | if (CONSP (val) | |
1577 | && SYMBOLP (XCONS (val)->car)) | |
1578 | { | |
1579 | val = XCONS (val)->cdr; | |
1580 | if (CONSP (val) && NILP (XCONS (val)->cdr)) | |
1581 | val = XCONS (val)->car; | |
1582 | } | |
1583 | val = clean_local_selection_data (val); | |
1584 | DONE: | |
1585 | UNGCPRO; | |
1586 | return val; | |
1587 | } | |
1588 | ||
1589 | DEFUN ("x-disown-selection-internal", | |
1590 | Fx_disown_selection_internal, Sx_disown_selection_internal, 1, 2, 0, | |
a87ed99c RS |
1591 | "If we own the selection SELECTION, disown it.\n\ |
1592 | Disowning it means there is no such selection.") | |
ede4db72 RS |
1593 | (selection, time) |
1594 | Lisp_Object selection; | |
1595 | Lisp_Object time; | |
1596 | { | |
1597 | Display *display = x_current_display; | |
1598 | Time timestamp; | |
1599 | Atom selection_atom; | |
1600 | XSelectionClearEvent event; | |
1601 | ||
1602 | CHECK_SYMBOL (selection, 0); | |
1603 | if (NILP (time)) | |
7da64e5c | 1604 | timestamp = last_event_timestamp; |
ede4db72 RS |
1605 | else |
1606 | timestamp = cons_to_long (time); | |
1607 | ||
1608 | if (NILP (assq_no_quit (selection, Vselection_alist))) | |
1609 | return Qnil; /* Don't disown the selection when we're not the owner. */ | |
1610 | ||
1611 | selection_atom = symbol_to_x_atom (display, selection); | |
1612 | ||
1613 | BLOCK_INPUT; | |
1614 | XSetSelectionOwner (display, selection_atom, None, timestamp); | |
1615 | UNBLOCK_INPUT; | |
1616 | ||
eb8c3be9 | 1617 | /* It doesn't seem to be guaranteed that a SelectionClear event will be |
ede4db72 RS |
1618 | generated for a window which owns the selection when that window sets |
1619 | the selection owner to None. The NCD server does, the MIT Sun4 server | |
1620 | doesn't. So we synthesize one; this means we might get two, but | |
1621 | that's ok, because the second one won't have any effect. */ | |
1622 | event.display = display; | |
1623 | event.selection = selection_atom; | |
1624 | event.time = timestamp; | |
1625 | x_handle_selection_clear (&event); | |
1626 | ||
1627 | return Qt; | |
1628 | } | |
1629 | ||
a87ed99c RS |
1630 | /* Get rid of all the selections in buffer BUFFER. |
1631 | This is used when we kill a buffer. */ | |
1632 | ||
1633 | void | |
1634 | x_disown_buffer_selections (buffer) | |
1635 | Lisp_Object buffer; | |
1636 | { | |
1637 | Lisp_Object tail; | |
1638 | struct buffer *buf = XBUFFER (buffer); | |
1639 | ||
1640 | for (tail = Vselection_alist; CONSP (tail); tail = XCONS (tail)->cdr) | |
1641 | { | |
1642 | Lisp_Object elt, value; | |
1643 | elt = XCONS (tail)->car; | |
1644 | value = XCONS (elt)->cdr; | |
1645 | if (CONSP (value) && MARKERP (XCONS (value)->car) | |
1646 | && XMARKER (XCONS (value)->car)->buffer == buf) | |
1647 | Fx_disown_selection_internal (XCONS (elt)->car, Qnil); | |
1648 | } | |
1649 | } | |
ede4db72 RS |
1650 | |
1651 | DEFUN ("x-selection-owner-p", Fx_selection_owner_p, Sx_selection_owner_p, | |
1652 | 0, 1, 0, | |
a87ed99c | 1653 | "Whether the current Emacs process owns the given X Selection.\n\ |
ede4db72 RS |
1654 | The arg should be the name of the selection in question, typically one of\n\ |
1655 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\ | |
1656 | \(Those are literal upper-case symbol names, since that's what X expects.)\n\ | |
1657 | For convenience, the symbol nil is the same as `PRIMARY',\n\ | |
1658 | and t is the same as `SECONDARY'.)") | |
1659 | (selection) | |
1660 | Lisp_Object selection; | |
1661 | { | |
1662 | CHECK_SYMBOL (selection, 0); | |
1663 | if (EQ (selection, Qnil)) selection = QPRIMARY; | |
1664 | if (EQ (selection, Qt)) selection = QSECONDARY; | |
1665 | ||
1666 | if (NILP (Fassq (selection, Vselection_alist))) | |
1667 | return Qnil; | |
1668 | return Qt; | |
1669 | } | |
1670 | ||
1671 | DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p, | |
1672 | 0, 1, 0, | |
1673 | "Whether there is an owner for the given X Selection.\n\ | |
1674 | The arg should be the name of the selection in question, typically one of\n\ | |
1675 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'.\n\ | |
1676 | \(Those are literal upper-case symbol names, since that's what X expects.)\n\ | |
1677 | For convenience, the symbol nil is the same as `PRIMARY',\n\ | |
1678 | and t is the same as `SECONDARY'.)") | |
1679 | (selection) | |
1680 | Lisp_Object selection; | |
1681 | { | |
1682 | Window owner; | |
356ba514 | 1683 | Atom atom; |
ede4db72 RS |
1684 | Display *dpy = x_current_display; |
1685 | CHECK_SYMBOL (selection, 0); | |
1686 | if (!NILP (Fx_selection_owner_p (selection))) | |
1687 | return Qt; | |
356ba514 RS |
1688 | if (EQ (selection, Qnil)) selection = QPRIMARY; |
1689 | if (EQ (selection, Qt)) selection = QSECONDARY; | |
1690 | atom = symbol_to_x_atom (dpy, selection); | |
1691 | if (atom == 0) | |
1692 | return Qnil; | |
ede4db72 | 1693 | BLOCK_INPUT; |
356ba514 | 1694 | owner = XGetSelectionOwner (dpy, atom); |
ede4db72 RS |
1695 | UNBLOCK_INPUT; |
1696 | return (owner ? Qt : Qnil); | |
1697 | } | |
1698 | ||
1699 | \f | |
1700 | #ifdef CUT_BUFFER_SUPPORT | |
1701 | ||
1702 | static int cut_buffers_initialized; /* Whether we're sure they all exist */ | |
1703 | ||
1704 | /* Ensure that all 8 cut buffers exist. ICCCM says we gotta... */ | |
1705 | static void | |
1706 | initialize_cut_buffers (display, window) | |
1707 | Display *display; | |
1708 | Window window; | |
1709 | { | |
1710 | unsigned char *data = (unsigned char *) ""; | |
1711 | BLOCK_INPUT; | |
1712 | #define FROB(atom) XChangeProperty (display, window, atom, XA_STRING, 8, \ | |
1713 | PropModeAppend, data, 0) | |
1714 | FROB (XA_CUT_BUFFER0); | |
1715 | FROB (XA_CUT_BUFFER1); | |
1716 | FROB (XA_CUT_BUFFER2); | |
1717 | FROB (XA_CUT_BUFFER3); | |
1718 | FROB (XA_CUT_BUFFER4); | |
1719 | FROB (XA_CUT_BUFFER5); | |
1720 | FROB (XA_CUT_BUFFER6); | |
1721 | FROB (XA_CUT_BUFFER7); | |
1722 | #undef FROB | |
1723 | UNBLOCK_INPUT; | |
1724 | cut_buffers_initialized = 1; | |
1725 | } | |
1726 | ||
1727 | ||
a87ed99c | 1728 | #define CHECK_CUT_BUFFER(symbol,n) \ |
ede4db72 RS |
1729 | { CHECK_SYMBOL ((symbol), (n)); \ |
1730 | if (!EQ((symbol), QCUT_BUFFER0) && !EQ((symbol), QCUT_BUFFER1) \ | |
1731 | && !EQ((symbol), QCUT_BUFFER2) && !EQ((symbol), QCUT_BUFFER3) \ | |
1732 | && !EQ((symbol), QCUT_BUFFER4) && !EQ((symbol), QCUT_BUFFER5) \ | |
1733 | && !EQ((symbol), QCUT_BUFFER6) && !EQ((symbol), QCUT_BUFFER7)) \ | |
1734 | Fsignal (Qerror, \ | |
a87ed99c | 1735 | Fcons (build_string ("doesn't name a cut buffer"), \ |
ede4db72 RS |
1736 | Fcons ((symbol), Qnil))); \ |
1737 | } | |
1738 | ||
a87ed99c RS |
1739 | DEFUN ("x-get-cut-buffer-internal", Fx_get_cut_buffer_internal, |
1740 | Sx_get_cut_buffer_internal, 1, 1, 0, | |
1741 | "Returns the value of the named cut buffer (typically CUT_BUFFER0).") | |
ede4db72 RS |
1742 | (buffer) |
1743 | Lisp_Object buffer; | |
1744 | { | |
1745 | Display *display = x_current_display; | |
a87ed99c | 1746 | Window window = RootWindow (display, 0); /* Cut buffers are on screen 0 */ |
ede4db72 RS |
1747 | Atom buffer_atom; |
1748 | unsigned char *data; | |
1749 | int bytes; | |
1750 | Atom type; | |
1751 | int format; | |
1752 | unsigned long size; | |
1753 | Lisp_Object ret; | |
1754 | ||
a87ed99c | 1755 | CHECK_CUT_BUFFER (buffer, 0); |
ede4db72 RS |
1756 | buffer_atom = symbol_to_x_atom (display, buffer); |
1757 | ||
1758 | x_get_window_property (display, window, buffer_atom, &data, &bytes, | |
1759 | &type, &format, &size, 0); | |
1760 | if (!data) return Qnil; | |
1761 | ||
1762 | if (format != 8 || type != XA_STRING) | |
1763 | Fsignal (Qerror, | |
1764 | Fcons (build_string ("cut buffer doesn't contain 8-bit data"), | |
1765 | Fcons (x_atom_to_symbol (display, type), | |
1766 | Fcons (make_number (format), Qnil)))); | |
1767 | ||
1768 | ret = (bytes ? make_string ((char *) data, bytes) : Qnil); | |
1769 | xfree (data); | |
1770 | return ret; | |
1771 | } | |
1772 | ||
1773 | ||
a87ed99c RS |
1774 | DEFUN ("x-store-cut-buffer-internal", Fx_store_cut_buffer_internal, |
1775 | Sx_store_cut_buffer_internal, 2, 2, 0, | |
1776 | "Sets the value of the named cut buffer (typically CUT_BUFFER0).") | |
ede4db72 RS |
1777 | (buffer, string) |
1778 | Lisp_Object buffer, string; | |
1779 | { | |
1780 | Display *display = x_current_display; | |
a87ed99c | 1781 | Window window = RootWindow (display, 0); /* Cut buffers are on screen 0 */ |
ede4db72 RS |
1782 | Atom buffer_atom; |
1783 | unsigned char *data; | |
1784 | int bytes; | |
1785 | int bytes_remaining; | |
1786 | int max_bytes = SELECTION_QUANTUM (display); | |
1787 | if (max_bytes > MAX_SELECTION_QUANTUM) max_bytes = MAX_SELECTION_QUANTUM; | |
1788 | ||
a87ed99c | 1789 | CHECK_CUT_BUFFER (buffer, 0); |
ede4db72 RS |
1790 | CHECK_STRING (string, 0); |
1791 | buffer_atom = symbol_to_x_atom (display, buffer); | |
1792 | data = (unsigned char *) XSTRING (string)->data; | |
1793 | bytes = XSTRING (string)->size; | |
1794 | bytes_remaining = bytes; | |
1795 | ||
1796 | if (! cut_buffers_initialized) initialize_cut_buffers (display, window); | |
1797 | ||
1798 | BLOCK_INPUT; | |
10608c8c RS |
1799 | |
1800 | /* Don't mess up with an empty value. */ | |
1801 | if (!bytes_remaining) | |
1802 | XChangeProperty (display, window, buffer_atom, XA_STRING, 8, | |
1803 | PropModeReplace, data, 0); | |
1804 | ||
ede4db72 RS |
1805 | while (bytes_remaining) |
1806 | { | |
1807 | int chunk = (bytes_remaining < max_bytes | |
1808 | ? bytes_remaining : max_bytes); | |
1809 | XChangeProperty (display, window, buffer_atom, XA_STRING, 8, | |
1810 | (bytes_remaining == bytes | |
1811 | ? PropModeReplace | |
1812 | : PropModeAppend), | |
1813 | data, chunk); | |
1814 | data += chunk; | |
1815 | bytes_remaining -= chunk; | |
1816 | } | |
1817 | UNBLOCK_INPUT; | |
1818 | return string; | |
1819 | } | |
1820 | ||
1821 | ||
a87ed99c RS |
1822 | DEFUN ("x-rotate-cut-buffers-internal", Fx_rotate_cut_buffers_internal, |
1823 | Sx_rotate_cut_buffers_internal, 1, 1, 0, | |
1824 | "Rotate the values of the cut buffers by the given number of steps;\n\ | |
ede4db72 RS |
1825 | positive means move values forward, negative means backward.") |
1826 | (n) | |
1827 | Lisp_Object n; | |
1828 | { | |
1829 | Display *display = x_current_display; | |
a87ed99c | 1830 | Window window = RootWindow (display, 0); /* Cut buffers are on screen 0 */ |
ede4db72 RS |
1831 | Atom props [8]; |
1832 | ||
7da64e5c | 1833 | CHECK_NUMBER (n, 0); |
ede4db72 RS |
1834 | if (XINT (n) == 0) return n; |
1835 | if (! cut_buffers_initialized) initialize_cut_buffers (display, window); | |
1836 | props[0] = XA_CUT_BUFFER0; | |
1837 | props[1] = XA_CUT_BUFFER1; | |
1838 | props[2] = XA_CUT_BUFFER2; | |
1839 | props[3] = XA_CUT_BUFFER3; | |
1840 | props[4] = XA_CUT_BUFFER4; | |
1841 | props[5] = XA_CUT_BUFFER5; | |
1842 | props[6] = XA_CUT_BUFFER6; | |
1843 | props[7] = XA_CUT_BUFFER7; | |
1844 | BLOCK_INPUT; | |
1845 | XRotateWindowProperties (display, window, props, 8, XINT (n)); | |
1846 | UNBLOCK_INPUT; | |
1847 | return n; | |
1848 | } | |
1849 | ||
1850 | #endif | |
1851 | \f | |
7da64e5c RS |
1852 | void |
1853 | Xatoms_of_xselect () | |
ede4db72 RS |
1854 | { |
1855 | #define ATOM(x) XInternAtom (x_current_display, (x), False) | |
1856 | ||
1857 | BLOCK_INPUT; | |
1858 | /* Non-predefined atoms that we might end up using a lot */ | |
1859 | Xatom_CLIPBOARD = ATOM ("CLIPBOARD"); | |
1860 | Xatom_TIMESTAMP = ATOM ("TIMESTAMP"); | |
1861 | Xatom_TEXT = ATOM ("TEXT"); | |
1862 | Xatom_DELETE = ATOM ("DELETE"); | |
1863 | Xatom_MULTIPLE = ATOM ("MULTIPLE"); | |
1864 | Xatom_INCR = ATOM ("INCR"); | |
1865 | Xatom_EMACS_TMP = ATOM ("_EMACS_TMP_"); | |
1866 | Xatom_TARGETS = ATOM ("TARGETS"); | |
1867 | Xatom_NULL = ATOM ("NULL"); | |
1868 | Xatom_ATOM_PAIR = ATOM ("ATOM_PAIR"); | |
1869 | UNBLOCK_INPUT; | |
1870 | } | |
1871 | ||
1872 | void | |
1873 | syms_of_xselect () | |
1874 | { | |
ede4db72 RS |
1875 | defsubr (&Sx_get_selection_internal); |
1876 | defsubr (&Sx_own_selection_internal); | |
1877 | defsubr (&Sx_disown_selection_internal); | |
1878 | defsubr (&Sx_selection_owner_p); | |
1879 | defsubr (&Sx_selection_exists_p); | |
1880 | ||
1881 | #ifdef CUT_BUFFER_SUPPORT | |
a87ed99c RS |
1882 | defsubr (&Sx_get_cut_buffer_internal); |
1883 | defsubr (&Sx_store_cut_buffer_internal); | |
1884 | defsubr (&Sx_rotate_cut_buffers_internal); | |
ede4db72 RS |
1885 | cut_buffers_initialized = 0; |
1886 | #endif | |
1887 | ||
1888 | reading_selection_reply = Fcons (Qnil, Qnil); | |
1889 | staticpro (&reading_selection_reply); | |
1890 | reading_selection_window = 0; | |
1891 | reading_which_selection = 0; | |
1892 | ||
1893 | property_change_wait_list = 0; | |
1894 | prop_location_tick = 0; | |
1895 | property_change_reply = Fcons (Qnil, Qnil); | |
1896 | staticpro (&property_change_reply); | |
1897 | ||
1898 | Vselection_alist = Qnil; | |
1899 | staticpro (&Vselection_alist); | |
1900 | ||
1901 | DEFVAR_LISP ("selection-converter-alist", &Vselection_converter_alist, | |
1902 | "An alist associating X Windows selection-types with functions.\n\ | |
1903 | These functions are called to convert the selection, with three args:\n\ | |
1904 | the name of the selection (typically `PRIMARY', `SECONDARY', or `CLIPBOARD');\n\ | |
1905 | a desired type to which the selection should be converted;\n\ | |
1906 | and the local selection value (whatever was given to `x-own-selection').\n\ | |
1907 | \n\ | |
1908 | The function should return the value to send to the X server\n\ | |
1909 | \(typically a string). A return value of nil\n\ | |
1910 | means that the conversion could not be done.\n\ | |
1911 | A return value which is the symbol `NULL'\n\ | |
1912 | means that a side-effect was executed,\n\ | |
1913 | and there is no meaningful selection value."); | |
1914 | Vselection_converter_alist = Qnil; | |
1915 | ||
1916 | DEFVAR_LISP ("x-lost-selection-hooks", &Vx_lost_selection_hooks, | |
1917 | "A list of functions to be called when Emacs loses an X selection.\n\ | |
1918 | \(This happens when some other X client makes its own selection\n\ | |
1919 | or when a Lisp program explicitly clears the selection.)\n\ | |
1920 | The functions are called with one argument, the selection type\n\ | |
1921 | \(a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'.)"); | |
1922 | Vx_lost_selection_hooks = Qnil; | |
1923 | ||
1924 | DEFVAR_LISP ("x-sent-selection-hooks", &Vx_sent_selection_hooks, | |
1925 | "A list of functions to be called when Emacs answers a selection request.\n\ | |
1926 | The functions are called with four arguments:\n\ | |
1927 | - the selection name (typically `PRIMARY', `SECONDARY', or `CLIPBOARD');\n\ | |
1928 | - the selection-type which Emacs was asked to convert the\n\ | |
1929 | selection into before sending (for example, `STRING' or `LENGTH');\n\ | |
1930 | - a flag indicating success or failure for responding to the request.\n\ | |
1931 | We might have failed (and declined the request) for any number of reasons,\n\ | |
1932 | including being asked for a selection that we no longer own, or being asked\n\ | |
1933 | to convert into a type that we don't know about or that is inappropriate.\n\ | |
1934 | This hook doesn't let you change the behavior of Emacs's selection replies,\n\ | |
1935 | it merely informs you that they have happened."); | |
1936 | Vx_sent_selection_hooks = Qnil; | |
1937 | ||
1938 | DEFVAR_INT ("x-selection-timeout", &x_selection_timeout, | |
80da0190 RS |
1939 | "Number of milliseconds to wait for a selection reply.\n\ |
1940 | If the selection owner doens't reply in this time, we give up.\n\ | |
ede4db72 | 1941 | A value of 0 means wait as long as necessary. This is initialized from the\n\ |
80da0190 | 1942 | \"*selectionTimeout\" resource."); |
ede4db72 RS |
1943 | x_selection_timeout = 0; |
1944 | ||
1945 | QPRIMARY = intern ("PRIMARY"); staticpro (&QPRIMARY); | |
1946 | QSECONDARY = intern ("SECONDARY"); staticpro (&QSECONDARY); | |
1947 | QSTRING = intern ("STRING"); staticpro (&QSTRING); | |
1948 | QINTEGER = intern ("INTEGER"); staticpro (&QINTEGER); | |
1949 | QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD); | |
1950 | QTIMESTAMP = intern ("TIMESTAMP"); staticpro (&QTIMESTAMP); | |
1951 | QTEXT = intern ("TEXT"); staticpro (&QTEXT); | |
1952 | QTIMESTAMP = intern ("TIMESTAMP"); staticpro (&QTIMESTAMP); | |
1953 | QDELETE = intern ("DELETE"); staticpro (&QDELETE); | |
1954 | QMULTIPLE = intern ("MULTIPLE"); staticpro (&QMULTIPLE); | |
1955 | QINCR = intern ("INCR"); staticpro (&QINCR); | |
1956 | QEMACS_TMP = intern ("_EMACS_TMP_"); staticpro (&QEMACS_TMP); | |
1957 | QTARGETS = intern ("TARGETS"); staticpro (&QTARGETS); | |
1958 | QATOM = intern ("ATOM"); staticpro (&QATOM); | |
1959 | QATOM_PAIR = intern ("ATOM_PAIR"); staticpro (&QATOM_PAIR); | |
1960 | QNULL = intern ("NULL"); staticpro (&QNULL); | |
1961 | ||
1962 | #ifdef CUT_BUFFER_SUPPORT | |
1963 | QCUT_BUFFER0 = intern ("CUT_BUFFER0"); staticpro (&QCUT_BUFFER0); | |
1964 | QCUT_BUFFER1 = intern ("CUT_BUFFER1"); staticpro (&QCUT_BUFFER1); | |
1965 | QCUT_BUFFER2 = intern ("CUT_BUFFER2"); staticpro (&QCUT_BUFFER2); | |
1966 | QCUT_BUFFER3 = intern ("CUT_BUFFER3"); staticpro (&QCUT_BUFFER3); | |
1967 | QCUT_BUFFER4 = intern ("CUT_BUFFER4"); staticpro (&QCUT_BUFFER4); | |
1968 | QCUT_BUFFER5 = intern ("CUT_BUFFER5"); staticpro (&QCUT_BUFFER5); | |
1969 | QCUT_BUFFER6 = intern ("CUT_BUFFER6"); staticpro (&QCUT_BUFFER6); | |
1970 | QCUT_BUFFER7 = intern ("CUT_BUFFER7"); staticpro (&QCUT_BUFFER7); | |
1971 | #endif | |
1972 | ||
1973 | } |