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