| 1 | /* X Selection processing for Emacs. |
| 2 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 2000, 2001, 2003, 2004 |
| 3 | Free Software Foundation. |
| 4 | |
| 5 | This file is part of GNU Emacs. |
| 6 | |
| 7 | GNU Emacs is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GNU Emacs is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GNU Emacs; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | |
| 23 | /* Rewritten by jwz */ |
| 24 | |
| 25 | #include <config.h> |
| 26 | #include <stdio.h> /* termhooks.h needs this */ |
| 27 | |
| 28 | #ifdef HAVE_SYS_TYPES_H |
| 29 | #include <sys/types.h> |
| 30 | #endif |
| 31 | #ifdef HAVE_UNISTD_H |
| 32 | #include <unistd.h> |
| 33 | #endif |
| 34 | |
| 35 | #include "lisp.h" |
| 36 | #include "xterm.h" /* for all of the X includes */ |
| 37 | #include "dispextern.h" /* frame.h seems to want this */ |
| 38 | #include "frame.h" /* Need this to get the X window of selected_frame */ |
| 39 | #include "blockinput.h" |
| 40 | #include "buffer.h" |
| 41 | #include "process.h" |
| 42 | #include "termhooks.h" |
| 43 | #include "keyboard.h" |
| 44 | |
| 45 | #include <X11/Xproto.h> |
| 46 | |
| 47 | struct prop_location; |
| 48 | |
| 49 | static Lisp_Object x_atom_to_symbol P_ ((Display *dpy, Atom atom)); |
| 50 | static Atom symbol_to_x_atom P_ ((struct x_display_info *, Display *, |
| 51 | Lisp_Object)); |
| 52 | static void x_own_selection P_ ((Lisp_Object, Lisp_Object)); |
| 53 | static Lisp_Object x_get_local_selection P_ ((Lisp_Object, Lisp_Object, int)); |
| 54 | static void x_decline_selection_request P_ ((struct input_event *)); |
| 55 | static Lisp_Object x_selection_request_lisp_error P_ ((Lisp_Object)); |
| 56 | static Lisp_Object queue_selection_requests_unwind P_ ((Lisp_Object)); |
| 57 | static Lisp_Object some_frame_on_display P_ ((struct x_display_info *)); |
| 58 | static void x_reply_selection_request P_ ((struct input_event *, int, |
| 59 | unsigned char *, int, Atom)); |
| 60 | static int waiting_for_other_props_on_window P_ ((Display *, Window)); |
| 61 | static struct prop_location *expect_property_change P_ ((Display *, Window, |
| 62 | Atom, int)); |
| 63 | static void unexpect_property_change P_ ((struct prop_location *)); |
| 64 | static Lisp_Object wait_for_property_change_unwind P_ ((Lisp_Object)); |
| 65 | static void wait_for_property_change P_ ((struct prop_location *)); |
| 66 | static Lisp_Object x_get_foreign_selection P_ ((Lisp_Object, |
| 67 | Lisp_Object, |
| 68 | Lisp_Object)); |
| 69 | static void x_get_window_property P_ ((Display *, Window, Atom, |
| 70 | unsigned char **, int *, |
| 71 | Atom *, int *, unsigned long *, int)); |
| 72 | static void receive_incremental_selection P_ ((Display *, Window, Atom, |
| 73 | Lisp_Object, unsigned, |
| 74 | unsigned char **, int *, |
| 75 | Atom *, int *, unsigned long *)); |
| 76 | static Lisp_Object x_get_window_property_as_lisp_data P_ ((Display *, |
| 77 | Window, Atom, |
| 78 | Lisp_Object, Atom)); |
| 79 | static Lisp_Object selection_data_to_lisp_data P_ ((Display *, unsigned char *, |
| 80 | int, Atom, int)); |
| 81 | static void lisp_data_to_selection_data P_ ((Display *, Lisp_Object, |
| 82 | unsigned char **, Atom *, |
| 83 | unsigned *, int *, int *)); |
| 84 | static Lisp_Object clean_local_selection_data P_ ((Lisp_Object)); |
| 85 | static void initialize_cut_buffers P_ ((Display *, Window)); |
| 86 | |
| 87 | |
| 88 | /* Printing traces to stderr. */ |
| 89 | |
| 90 | #ifdef TRACE_SELECTION |
| 91 | #define TRACE0(fmt) \ |
| 92 | fprintf (stderr, "%d: " fmt "\n", getpid ()) |
| 93 | #define TRACE1(fmt, a0) \ |
| 94 | fprintf (stderr, "%d: " fmt "\n", getpid (), a0) |
| 95 | #define TRACE2(fmt, a0, a1) \ |
| 96 | fprintf (stderr, "%d: " fmt "\n", getpid (), a0, a1) |
| 97 | #define TRACE3(fmt, a0, a1, a2) \ |
| 98 | fprintf (stderr, "%d: " fmt "\n", getpid (), a0, a1, a2) |
| 99 | #else |
| 100 | #define TRACE0(fmt) (void) 0 |
| 101 | #define TRACE1(fmt, a0) (void) 0 |
| 102 | #define TRACE2(fmt, a0, a1) (void) 0 |
| 103 | #define TRACE3(fmt, a0, a1) (void) 0 |
| 104 | #endif |
| 105 | |
| 106 | |
| 107 | #define CUT_BUFFER_SUPPORT |
| 108 | |
| 109 | Lisp_Object QPRIMARY, QSECONDARY, QSTRING, QINTEGER, QCLIPBOARD, QTIMESTAMP, |
| 110 | QTEXT, QDELETE, QMULTIPLE, QINCR, QEMACS_TMP, QTARGETS, QATOM, QNULL, |
| 111 | QATOM_PAIR; |
| 112 | |
| 113 | Lisp_Object QCOMPOUND_TEXT; /* This is a type of selection. */ |
| 114 | Lisp_Object QUTF8_STRING; /* This is a type of selection. */ |
| 115 | |
| 116 | Lisp_Object Qcompound_text_with_extensions; |
| 117 | |
| 118 | #ifdef CUT_BUFFER_SUPPORT |
| 119 | Lisp_Object QCUT_BUFFER0, QCUT_BUFFER1, QCUT_BUFFER2, QCUT_BUFFER3, |
| 120 | QCUT_BUFFER4, QCUT_BUFFER5, QCUT_BUFFER6, QCUT_BUFFER7; |
| 121 | #endif |
| 122 | |
| 123 | static Lisp_Object Vx_lost_selection_functions; |
| 124 | static Lisp_Object Vx_sent_selection_functions; |
| 125 | /* Coding system for communicating with other X clients via cutbuffer, |
| 126 | selection, and clipboard. */ |
| 127 | static Lisp_Object Vselection_coding_system; |
| 128 | |
| 129 | /* Coding system for the next communicating with other X clients. */ |
| 130 | static Lisp_Object Vnext_selection_coding_system; |
| 131 | |
| 132 | static Lisp_Object Qforeign_selection; |
| 133 | |
| 134 | /* If this is a smaller number than the max-request-size of the display, |
| 135 | emacs will use INCR selection transfer when the selection is larger |
| 136 | than this. The max-request-size is usually around 64k, so if you want |
| 137 | emacs to use incremental selection transfers when the selection is |
| 138 | smaller than that, set this. I added this mostly for debugging the |
| 139 | incremental transfer stuff, but it might improve server performance. */ |
| 140 | #define MAX_SELECTION_QUANTUM 0xFFFFFF |
| 141 | |
| 142 | #ifdef HAVE_X11R4 |
| 143 | #define SELECTION_QUANTUM(dpy) ((XMaxRequestSize(dpy) << 2) - 100) |
| 144 | #else |
| 145 | #define SELECTION_QUANTUM(dpy) (((dpy)->max_request_size << 2) - 100) |
| 146 | #endif |
| 147 | |
| 148 | /* The timestamp of the last input event Emacs received from the X server. */ |
| 149 | /* Defined in keyboard.c. */ |
| 150 | extern unsigned long last_event_timestamp; |
| 151 | |
| 152 | /* This is an association list whose elements are of the form |
| 153 | ( SELECTION-NAME SELECTION-VALUE SELECTION-TIMESTAMP FRAME) |
| 154 | SELECTION-NAME is a lisp symbol, whose name is the name of an X Atom. |
| 155 | SELECTION-VALUE is the value that emacs owns for that selection. |
| 156 | It may be any kind of Lisp object. |
| 157 | SELECTION-TIMESTAMP is the time at which emacs began owning this selection, |
| 158 | as a cons of two 16-bit numbers (making a 32 bit time.) |
| 159 | FRAME is the frame for which we made the selection. |
| 160 | If there is an entry in this alist, then it can be assumed that Emacs owns |
| 161 | that selection. |
| 162 | The only (eq) parts of this list that are visible from Lisp are the |
| 163 | selection-values. */ |
| 164 | static Lisp_Object Vselection_alist; |
| 165 | |
| 166 | /* This is an alist whose CARs are selection-types (whose names are the same |
| 167 | as the names of X Atoms) and whose CDRs are the names of Lisp functions to |
| 168 | call to convert the given Emacs selection value to a string representing |
| 169 | the given selection type. This is for Lisp-level extension of the emacs |
| 170 | selection handling. */ |
| 171 | static Lisp_Object Vselection_converter_alist; |
| 172 | |
| 173 | /* If the selection owner takes too long to reply to a selection request, |
| 174 | we give up on it. This is in milliseconds (0 = no timeout.) */ |
| 175 | static EMACS_INT x_selection_timeout; |
| 176 | |
| 177 | |
| 178 | \f |
| 179 | /* Define a queue to save up SELECTION_REQUEST_EVENT events for later |
| 180 | handling. */ |
| 181 | |
| 182 | struct selection_event_queue |
| 183 | { |
| 184 | struct input_event event; |
| 185 | struct selection_event_queue *next; |
| 186 | }; |
| 187 | |
| 188 | static struct selection_event_queue *selection_queue; |
| 189 | |
| 190 | /* Nonzero means queue up SELECTION_REQUEST_EVENT events. */ |
| 191 | |
| 192 | static int x_queue_selection_requests; |
| 193 | |
| 194 | /* Queue up an SELECTION_REQUEST_EVENT *EVENT, to be processed later. */ |
| 195 | |
| 196 | static void |
| 197 | x_queue_event (event) |
| 198 | struct input_event *event; |
| 199 | { |
| 200 | struct selection_event_queue *queue_tmp; |
| 201 | |
| 202 | /* Don't queue repeated requests. |
| 203 | This only happens for large requests which uses the incremental protocol. */ |
| 204 | for (queue_tmp = selection_queue; queue_tmp; queue_tmp = queue_tmp->next) |
| 205 | { |
| 206 | if (!bcmp (&queue_tmp->event, event, sizeof (*event))) |
| 207 | { |
| 208 | TRACE1 ("DECLINE DUP SELECTION EVENT %08lx", (unsigned long)queue_tmp); |
| 209 | x_decline_selection_request (event); |
| 210 | return; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | queue_tmp |
| 215 | = (struct selection_event_queue *) xmalloc (sizeof (struct selection_event_queue)); |
| 216 | |
| 217 | if (queue_tmp != NULL) |
| 218 | { |
| 219 | TRACE1 ("QUEUE SELECTION EVENT %08lx", (unsigned long)queue_tmp); |
| 220 | queue_tmp->event = *event; |
| 221 | queue_tmp->next = selection_queue; |
| 222 | selection_queue = queue_tmp; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | /* Start queuing SELECTION_REQUEST_EVENT events. */ |
| 227 | |
| 228 | static void |
| 229 | x_start_queuing_selection_requests () |
| 230 | { |
| 231 | if (x_queue_selection_requests) |
| 232 | abort (); |
| 233 | |
| 234 | x_queue_selection_requests++; |
| 235 | TRACE1 ("x_start_queuing_selection_requests %d", x_queue_selection_requests); |
| 236 | } |
| 237 | |
| 238 | /* Stop queuing SELECTION_REQUEST_EVENT events. */ |
| 239 | |
| 240 | static void |
| 241 | x_stop_queuing_selection_requests () |
| 242 | { |
| 243 | TRACE1 ("x_stop_queuing_selection_requests %d", x_queue_selection_requests); |
| 244 | --x_queue_selection_requests; |
| 245 | |
| 246 | /* Take all the queued events and put them back |
| 247 | so that they get processed afresh. */ |
| 248 | |
| 249 | while (selection_queue != NULL) |
| 250 | { |
| 251 | struct selection_event_queue *queue_tmp = selection_queue; |
| 252 | TRACE1 ("RESTORE SELECTION EVENT %08lx", (unsigned long)queue_tmp); |
| 253 | kbd_buffer_unget_event (&queue_tmp->event); |
| 254 | selection_queue = queue_tmp->next; |
| 255 | xfree ((char *)queue_tmp); |
| 256 | } |
| 257 | } |
| 258 | \f |
| 259 | |
| 260 | /* This converts a Lisp symbol to a server Atom, avoiding a server |
| 261 | roundtrip whenever possible. */ |
| 262 | |
| 263 | static Atom |
| 264 | symbol_to_x_atom (dpyinfo, display, sym) |
| 265 | struct x_display_info *dpyinfo; |
| 266 | Display *display; |
| 267 | Lisp_Object sym; |
| 268 | { |
| 269 | Atom val; |
| 270 | if (NILP (sym)) return 0; |
| 271 | if (EQ (sym, QPRIMARY)) return XA_PRIMARY; |
| 272 | if (EQ (sym, QSECONDARY)) return XA_SECONDARY; |
| 273 | if (EQ (sym, QSTRING)) return XA_STRING; |
| 274 | if (EQ (sym, QINTEGER)) return XA_INTEGER; |
| 275 | if (EQ (sym, QATOM)) return XA_ATOM; |
| 276 | if (EQ (sym, QCLIPBOARD)) return dpyinfo->Xatom_CLIPBOARD; |
| 277 | if (EQ (sym, QTIMESTAMP)) return dpyinfo->Xatom_TIMESTAMP; |
| 278 | if (EQ (sym, QTEXT)) return dpyinfo->Xatom_TEXT; |
| 279 | if (EQ (sym, QCOMPOUND_TEXT)) return dpyinfo->Xatom_COMPOUND_TEXT; |
| 280 | if (EQ (sym, QUTF8_STRING)) return dpyinfo->Xatom_UTF8_STRING; |
| 281 | if (EQ (sym, QDELETE)) return dpyinfo->Xatom_DELETE; |
| 282 | if (EQ (sym, QMULTIPLE)) return dpyinfo->Xatom_MULTIPLE; |
| 283 | if (EQ (sym, QINCR)) return dpyinfo->Xatom_INCR; |
| 284 | if (EQ (sym, QEMACS_TMP)) return dpyinfo->Xatom_EMACS_TMP; |
| 285 | if (EQ (sym, QTARGETS)) return dpyinfo->Xatom_TARGETS; |
| 286 | if (EQ (sym, QNULL)) return dpyinfo->Xatom_NULL; |
| 287 | #ifdef CUT_BUFFER_SUPPORT |
| 288 | if (EQ (sym, QCUT_BUFFER0)) return XA_CUT_BUFFER0; |
| 289 | if (EQ (sym, QCUT_BUFFER1)) return XA_CUT_BUFFER1; |
| 290 | if (EQ (sym, QCUT_BUFFER2)) return XA_CUT_BUFFER2; |
| 291 | if (EQ (sym, QCUT_BUFFER3)) return XA_CUT_BUFFER3; |
| 292 | if (EQ (sym, QCUT_BUFFER4)) return XA_CUT_BUFFER4; |
| 293 | if (EQ (sym, QCUT_BUFFER5)) return XA_CUT_BUFFER5; |
| 294 | if (EQ (sym, QCUT_BUFFER6)) return XA_CUT_BUFFER6; |
| 295 | if (EQ (sym, QCUT_BUFFER7)) return XA_CUT_BUFFER7; |
| 296 | #endif |
| 297 | if (!SYMBOLP (sym)) abort (); |
| 298 | |
| 299 | TRACE1 (" XInternAtom %s", (char *) SDATA (SYMBOL_NAME (sym))); |
| 300 | BLOCK_INPUT; |
| 301 | val = XInternAtom (display, (char *) SDATA (SYMBOL_NAME (sym)), False); |
| 302 | UNBLOCK_INPUT; |
| 303 | return val; |
| 304 | } |
| 305 | |
| 306 | |
| 307 | /* This converts a server Atom to a Lisp symbol, avoiding server roundtrips |
| 308 | and calls to intern whenever possible. */ |
| 309 | |
| 310 | static Lisp_Object |
| 311 | x_atom_to_symbol (dpy, atom) |
| 312 | Display *dpy; |
| 313 | Atom atom; |
| 314 | { |
| 315 | struct x_display_info *dpyinfo; |
| 316 | char *str; |
| 317 | Lisp_Object val; |
| 318 | |
| 319 | if (! atom) |
| 320 | return Qnil; |
| 321 | |
| 322 | switch (atom) |
| 323 | { |
| 324 | case XA_PRIMARY: |
| 325 | return QPRIMARY; |
| 326 | case XA_SECONDARY: |
| 327 | return QSECONDARY; |
| 328 | case XA_STRING: |
| 329 | return QSTRING; |
| 330 | case XA_INTEGER: |
| 331 | return QINTEGER; |
| 332 | case XA_ATOM: |
| 333 | return QATOM; |
| 334 | #ifdef CUT_BUFFER_SUPPORT |
| 335 | case XA_CUT_BUFFER0: |
| 336 | return QCUT_BUFFER0; |
| 337 | case XA_CUT_BUFFER1: |
| 338 | return QCUT_BUFFER1; |
| 339 | case XA_CUT_BUFFER2: |
| 340 | return QCUT_BUFFER2; |
| 341 | case XA_CUT_BUFFER3: |
| 342 | return QCUT_BUFFER3; |
| 343 | case XA_CUT_BUFFER4: |
| 344 | return QCUT_BUFFER4; |
| 345 | case XA_CUT_BUFFER5: |
| 346 | return QCUT_BUFFER5; |
| 347 | case XA_CUT_BUFFER6: |
| 348 | return QCUT_BUFFER6; |
| 349 | case XA_CUT_BUFFER7: |
| 350 | return QCUT_BUFFER7; |
| 351 | #endif |
| 352 | } |
| 353 | |
| 354 | dpyinfo = x_display_info_for_display (dpy); |
| 355 | if (atom == dpyinfo->Xatom_CLIPBOARD) |
| 356 | return QCLIPBOARD; |
| 357 | if (atom == dpyinfo->Xatom_TIMESTAMP) |
| 358 | return QTIMESTAMP; |
| 359 | if (atom == dpyinfo->Xatom_TEXT) |
| 360 | return QTEXT; |
| 361 | if (atom == dpyinfo->Xatom_COMPOUND_TEXT) |
| 362 | return QCOMPOUND_TEXT; |
| 363 | if (atom == dpyinfo->Xatom_UTF8_STRING) |
| 364 | return QUTF8_STRING; |
| 365 | if (atom == dpyinfo->Xatom_DELETE) |
| 366 | return QDELETE; |
| 367 | if (atom == dpyinfo->Xatom_MULTIPLE) |
| 368 | return QMULTIPLE; |
| 369 | if (atom == dpyinfo->Xatom_INCR) |
| 370 | return QINCR; |
| 371 | if (atom == dpyinfo->Xatom_EMACS_TMP) |
| 372 | return QEMACS_TMP; |
| 373 | if (atom == dpyinfo->Xatom_TARGETS) |
| 374 | return QTARGETS; |
| 375 | if (atom == dpyinfo->Xatom_NULL) |
| 376 | return QNULL; |
| 377 | |
| 378 | BLOCK_INPUT; |
| 379 | str = XGetAtomName (dpy, atom); |
| 380 | UNBLOCK_INPUT; |
| 381 | TRACE1 ("XGetAtomName --> %s", str); |
| 382 | if (! str) return Qnil; |
| 383 | val = intern (str); |
| 384 | BLOCK_INPUT; |
| 385 | /* This was allocated by Xlib, so use XFree. */ |
| 386 | XFree (str); |
| 387 | UNBLOCK_INPUT; |
| 388 | return val; |
| 389 | } |
| 390 | \f |
| 391 | /* Do protocol to assert ourself as a selection owner. |
| 392 | Update the Vselection_alist so that we can reply to later requests for |
| 393 | our selection. */ |
| 394 | |
| 395 | static void |
| 396 | x_own_selection (selection_name, selection_value) |
| 397 | Lisp_Object selection_name, selection_value; |
| 398 | { |
| 399 | struct frame *sf = SELECTED_FRAME (); |
| 400 | Window selecting_window = FRAME_X_WINDOW (sf); |
| 401 | Display *display = FRAME_X_DISPLAY (sf); |
| 402 | Time time = last_event_timestamp; |
| 403 | Atom selection_atom; |
| 404 | struct x_display_info *dpyinfo = FRAME_X_DISPLAY_INFO (sf); |
| 405 | int count; |
| 406 | |
| 407 | CHECK_SYMBOL (selection_name); |
| 408 | selection_atom = symbol_to_x_atom (dpyinfo, display, selection_name); |
| 409 | |
| 410 | BLOCK_INPUT; |
| 411 | count = x_catch_errors (display); |
| 412 | XSetSelectionOwner (display, selection_atom, selecting_window, time); |
| 413 | x_check_errors (display, "Can't set selection: %s"); |
| 414 | x_uncatch_errors (display, count); |
| 415 | UNBLOCK_INPUT; |
| 416 | |
| 417 | /* Now update the local cache */ |
| 418 | { |
| 419 | Lisp_Object selection_time; |
| 420 | Lisp_Object selection_data; |
| 421 | Lisp_Object prev_value; |
| 422 | |
| 423 | selection_time = long_to_cons ((unsigned long) time); |
| 424 | selection_data = Fcons (selection_name, |
| 425 | Fcons (selection_value, |
| 426 | Fcons (selection_time, |
| 427 | Fcons (selected_frame, Qnil)))); |
| 428 | prev_value = assq_no_quit (selection_name, Vselection_alist); |
| 429 | |
| 430 | Vselection_alist = Fcons (selection_data, Vselection_alist); |
| 431 | |
| 432 | /* If we already owned the selection, remove the old selection data. |
| 433 | Perhaps we should destructively modify it instead. |
| 434 | Don't use Fdelq as that may QUIT. */ |
| 435 | if (!NILP (prev_value)) |
| 436 | { |
| 437 | Lisp_Object rest; /* we know it's not the CAR, so it's easy. */ |
| 438 | for (rest = Vselection_alist; !NILP (rest); rest = Fcdr (rest)) |
| 439 | if (EQ (prev_value, Fcar (XCDR (rest)))) |
| 440 | { |
| 441 | XSETCDR (rest, Fcdr (XCDR (rest))); |
| 442 | break; |
| 443 | } |
| 444 | } |
| 445 | } |
| 446 | } |
| 447 | \f |
| 448 | /* Given a selection-name and desired type, look up our local copy of |
| 449 | the selection value and convert it to the type. |
| 450 | The value is nil or a string. |
| 451 | This function is used both for remote requests (LOCAL_REQUEST is zero) |
| 452 | and for local x-get-selection-internal (LOCAL_REQUEST is nonzero). |
| 453 | |
| 454 | This calls random Lisp code, and may signal or gc. */ |
| 455 | |
| 456 | static Lisp_Object |
| 457 | x_get_local_selection (selection_symbol, target_type, local_request) |
| 458 | Lisp_Object selection_symbol, target_type; |
| 459 | int local_request; |
| 460 | { |
| 461 | Lisp_Object local_value; |
| 462 | Lisp_Object handler_fn, value, type, check; |
| 463 | int count; |
| 464 | |
| 465 | local_value = assq_no_quit (selection_symbol, Vselection_alist); |
| 466 | |
| 467 | if (NILP (local_value)) return Qnil; |
| 468 | |
| 469 | /* TIMESTAMP and MULTIPLE are special cases 'cause that's easiest. */ |
| 470 | if (EQ (target_type, QTIMESTAMP)) |
| 471 | { |
| 472 | handler_fn = Qnil; |
| 473 | value = XCAR (XCDR (XCDR (local_value))); |
| 474 | } |
| 475 | #if 0 |
| 476 | else if (EQ (target_type, QDELETE)) |
| 477 | { |
| 478 | handler_fn = Qnil; |
| 479 | Fx_disown_selection_internal |
| 480 | (selection_symbol, |
| 481 | XCAR (XCDR (XCDR (local_value)))); |
| 482 | value = QNULL; |
| 483 | } |
| 484 | #endif |
| 485 | |
| 486 | #if 0 /* #### MULTIPLE doesn't work yet */ |
| 487 | else if (CONSP (target_type) |
| 488 | && XCAR (target_type) == QMULTIPLE) |
| 489 | { |
| 490 | Lisp_Object pairs; |
| 491 | int size; |
| 492 | int i; |
| 493 | pairs = XCDR (target_type); |
| 494 | size = XVECTOR (pairs)->size; |
| 495 | /* If the target is MULTIPLE, then target_type looks like |
| 496 | (MULTIPLE . [[SELECTION1 TARGET1] [SELECTION2 TARGET2] ... ]) |
| 497 | We modify the second element of each pair in the vector and |
| 498 | return it as [[SELECTION1 <value1>] [SELECTION2 <value2>] ... ] |
| 499 | */ |
| 500 | for (i = 0; i < size; i++) |
| 501 | { |
| 502 | Lisp_Object pair; |
| 503 | pair = XVECTOR (pairs)->contents [i]; |
| 504 | XVECTOR (pair)->contents [1] |
| 505 | = x_get_local_selection (XVECTOR (pair)->contents [0], |
| 506 | XVECTOR (pair)->contents [1], |
| 507 | local_request); |
| 508 | } |
| 509 | return pairs; |
| 510 | } |
| 511 | #endif |
| 512 | else |
| 513 | { |
| 514 | /* Don't allow a quit within the converter. |
| 515 | When the user types C-g, he would be surprised |
| 516 | if by luck it came during a converter. */ |
| 517 | count = SPECPDL_INDEX (); |
| 518 | specbind (Qinhibit_quit, Qt); |
| 519 | |
| 520 | CHECK_SYMBOL (target_type); |
| 521 | handler_fn = Fcdr (Fassq (target_type, Vselection_converter_alist)); |
| 522 | /* gcpro is not needed here since nothing but HANDLER_FN |
| 523 | is live, and that ought to be a symbol. */ |
| 524 | |
| 525 | if (!NILP (handler_fn)) |
| 526 | value = call3 (handler_fn, |
| 527 | selection_symbol, (local_request ? Qnil : target_type), |
| 528 | XCAR (XCDR (local_value))); |
| 529 | else |
| 530 | value = Qnil; |
| 531 | unbind_to (count, Qnil); |
| 532 | } |
| 533 | |
| 534 | /* Make sure this value is of a type that we could transmit |
| 535 | to another X client. */ |
| 536 | |
| 537 | check = value; |
| 538 | if (CONSP (value) |
| 539 | && SYMBOLP (XCAR (value))) |
| 540 | type = XCAR (value), |
| 541 | check = XCDR (value); |
| 542 | |
| 543 | if (STRINGP (check) |
| 544 | || VECTORP (check) |
| 545 | || SYMBOLP (check) |
| 546 | || INTEGERP (check) |
| 547 | || NILP (value)) |
| 548 | return value; |
| 549 | /* Check for a value that cons_to_long could handle. */ |
| 550 | else if (CONSP (check) |
| 551 | && INTEGERP (XCAR (check)) |
| 552 | && (INTEGERP (XCDR (check)) |
| 553 | || |
| 554 | (CONSP (XCDR (check)) |
| 555 | && INTEGERP (XCAR (XCDR (check))) |
| 556 | && NILP (XCDR (XCDR (check)))))) |
| 557 | return value; |
| 558 | else |
| 559 | return |
| 560 | Fsignal (Qerror, |
| 561 | Fcons (build_string ("invalid data returned by selection-conversion function"), |
| 562 | Fcons (handler_fn, Fcons (value, Qnil)))); |
| 563 | } |
| 564 | \f |
| 565 | /* Subroutines of x_reply_selection_request. */ |
| 566 | |
| 567 | /* Send a SelectionNotify event to the requestor with property=None, |
| 568 | meaning we were unable to do what they wanted. */ |
| 569 | |
| 570 | static void |
| 571 | x_decline_selection_request (event) |
| 572 | struct input_event *event; |
| 573 | { |
| 574 | XSelectionEvent reply; |
| 575 | int count; |
| 576 | |
| 577 | reply.type = SelectionNotify; |
| 578 | reply.display = SELECTION_EVENT_DISPLAY (event); |
| 579 | reply.requestor = SELECTION_EVENT_REQUESTOR (event); |
| 580 | reply.selection = SELECTION_EVENT_SELECTION (event); |
| 581 | reply.time = SELECTION_EVENT_TIME (event); |
| 582 | reply.target = SELECTION_EVENT_TARGET (event); |
| 583 | reply.property = None; |
| 584 | |
| 585 | /* The reason for the error may be that the receiver has |
| 586 | died in the meantime. Handle that case. */ |
| 587 | BLOCK_INPUT; |
| 588 | count = x_catch_errors (reply.display); |
| 589 | XSendEvent (reply.display, reply.requestor, False, 0L, (XEvent *) &reply); |
| 590 | XFlush (reply.display); |
| 591 | x_uncatch_errors (reply.display, count); |
| 592 | UNBLOCK_INPUT; |
| 593 | } |
| 594 | |
| 595 | /* This is the selection request currently being processed. |
| 596 | It is set to zero when the request is fully processed. */ |
| 597 | static struct input_event *x_selection_current_request; |
| 598 | |
| 599 | /* Display info in x_selection_request. */ |
| 600 | |
| 601 | static struct x_display_info *selection_request_dpyinfo; |
| 602 | |
| 603 | /* Used as an unwind-protect clause so that, if a selection-converter signals |
| 604 | an error, we tell the requester that we were unable to do what they wanted |
| 605 | before we throw to top-level or go into the debugger or whatever. */ |
| 606 | |
| 607 | static Lisp_Object |
| 608 | x_selection_request_lisp_error (ignore) |
| 609 | Lisp_Object ignore; |
| 610 | { |
| 611 | if (x_selection_current_request != 0 |
| 612 | && selection_request_dpyinfo->display) |
| 613 | x_decline_selection_request (x_selection_current_request); |
| 614 | return Qnil; |
| 615 | } |
| 616 | \f |
| 617 | |
| 618 | /* This stuff is so that INCR selections are reentrant (that is, so we can |
| 619 | be servicing multiple INCR selection requests simultaneously.) I haven't |
| 620 | actually tested that yet. */ |
| 621 | |
| 622 | /* Keep a list of the property changes that are awaited. */ |
| 623 | |
| 624 | struct prop_location |
| 625 | { |
| 626 | int identifier; |
| 627 | Display *display; |
| 628 | Window window; |
| 629 | Atom property; |
| 630 | int desired_state; |
| 631 | int arrived; |
| 632 | struct prop_location *next; |
| 633 | }; |
| 634 | |
| 635 | static struct prop_location *expect_property_change (); |
| 636 | static void wait_for_property_change (); |
| 637 | static void unexpect_property_change (); |
| 638 | static int waiting_for_other_props_on_window (); |
| 639 | |
| 640 | static int prop_location_identifier; |
| 641 | |
| 642 | static Lisp_Object property_change_reply; |
| 643 | |
| 644 | static struct prop_location *property_change_reply_object; |
| 645 | |
| 646 | static struct prop_location *property_change_wait_list; |
| 647 | |
| 648 | static Lisp_Object |
| 649 | queue_selection_requests_unwind (tem) |
| 650 | Lisp_Object tem; |
| 651 | { |
| 652 | x_stop_queuing_selection_requests (); |
| 653 | return Qnil; |
| 654 | } |
| 655 | |
| 656 | /* Return some frame whose display info is DPYINFO. |
| 657 | Return nil if there is none. */ |
| 658 | |
| 659 | static Lisp_Object |
| 660 | some_frame_on_display (dpyinfo) |
| 661 | struct x_display_info *dpyinfo; |
| 662 | { |
| 663 | Lisp_Object list, frame; |
| 664 | |
| 665 | FOR_EACH_FRAME (list, frame) |
| 666 | { |
| 667 | if (FRAME_X_DISPLAY_INFO (XFRAME (frame)) == dpyinfo) |
| 668 | return frame; |
| 669 | } |
| 670 | |
| 671 | return Qnil; |
| 672 | } |
| 673 | \f |
| 674 | /* Send the reply to a selection request event EVENT. |
| 675 | TYPE is the type of selection data requested. |
| 676 | DATA and SIZE describe the data to send, already converted. |
| 677 | FORMAT is the unit-size (in bits) of the data to be transmitted. */ |
| 678 | |
| 679 | static void |
| 680 | x_reply_selection_request (event, format, data, size, type) |
| 681 | struct input_event *event; |
| 682 | int format, size; |
| 683 | unsigned char *data; |
| 684 | Atom type; |
| 685 | { |
| 686 | XSelectionEvent reply; |
| 687 | Display *display = SELECTION_EVENT_DISPLAY (event); |
| 688 | Window window = SELECTION_EVENT_REQUESTOR (event); |
| 689 | int bytes_remaining; |
| 690 | int format_bytes = format/8; |
| 691 | int max_bytes = SELECTION_QUANTUM (display); |
| 692 | struct x_display_info *dpyinfo = x_display_info_for_display (display); |
| 693 | int count; |
| 694 | |
| 695 | if (max_bytes > MAX_SELECTION_QUANTUM) |
| 696 | max_bytes = MAX_SELECTION_QUANTUM; |
| 697 | |
| 698 | reply.type = SelectionNotify; |
| 699 | reply.display = display; |
| 700 | reply.requestor = window; |
| 701 | reply.selection = SELECTION_EVENT_SELECTION (event); |
| 702 | reply.time = SELECTION_EVENT_TIME (event); |
| 703 | reply.target = SELECTION_EVENT_TARGET (event); |
| 704 | reply.property = SELECTION_EVENT_PROPERTY (event); |
| 705 | if (reply.property == None) |
| 706 | reply.property = reply.target; |
| 707 | |
| 708 | /* #### XChangeProperty can generate BadAlloc, and we must handle it! */ |
| 709 | BLOCK_INPUT; |
| 710 | count = x_catch_errors (display); |
| 711 | |
| 712 | #ifdef TRACE_SELECTION |
| 713 | { |
| 714 | static int cnt; |
| 715 | char *sel = XGetAtomName (display, reply.selection); |
| 716 | char *tgt = XGetAtomName (display, reply.target); |
| 717 | TRACE3 ("%s, target %s (%d)", sel, tgt, ++cnt); |
| 718 | if (sel) XFree (sel); |
| 719 | if (tgt) XFree (tgt); |
| 720 | } |
| 721 | #endif /* TRACE_SELECTION */ |
| 722 | |
| 723 | /* Store the data on the requested property. |
| 724 | If the selection is large, only store the first N bytes of it. |
| 725 | */ |
| 726 | bytes_remaining = size * format_bytes; |
| 727 | if (bytes_remaining <= max_bytes) |
| 728 | { |
| 729 | /* Send all the data at once, with minimal handshaking. */ |
| 730 | TRACE1 ("Sending all %d bytes", bytes_remaining); |
| 731 | XChangeProperty (display, window, reply.property, type, format, |
| 732 | PropModeReplace, data, size); |
| 733 | /* At this point, the selection was successfully stored; ack it. */ |
| 734 | XSendEvent (display, window, False, 0L, (XEvent *) &reply); |
| 735 | } |
| 736 | else |
| 737 | { |
| 738 | /* Send an INCR selection. */ |
| 739 | struct prop_location *wait_object; |
| 740 | int had_errors; |
| 741 | Lisp_Object frame; |
| 742 | |
| 743 | frame = some_frame_on_display (dpyinfo); |
| 744 | |
| 745 | /* If the display no longer has frames, we can't expect |
| 746 | to get many more selection requests from it, so don't |
| 747 | bother trying to queue them. */ |
| 748 | if (!NILP (frame)) |
| 749 | { |
| 750 | x_start_queuing_selection_requests (); |
| 751 | |
| 752 | record_unwind_protect (queue_selection_requests_unwind, |
| 753 | Qnil); |
| 754 | } |
| 755 | |
| 756 | if (x_window_to_frame (dpyinfo, window)) /* #### debug */ |
| 757 | error ("Attempt to transfer an INCR to ourself!"); |
| 758 | |
| 759 | TRACE2 ("Start sending %d bytes incrementally (%s)", |
| 760 | bytes_remaining, XGetAtomName (display, reply.property)); |
| 761 | wait_object = expect_property_change (display, window, reply.property, |
| 762 | PropertyDelete); |
| 763 | |
| 764 | TRACE1 ("Set %s to number of bytes to send", |
| 765 | XGetAtomName (display, reply.property)); |
| 766 | { |
| 767 | /* XChangeProperty expects an array of long even if long is more than |
| 768 | 32 bits. */ |
| 769 | long value[1]; |
| 770 | |
| 771 | value[0] = bytes_remaining; |
| 772 | XChangeProperty (display, window, reply.property, dpyinfo->Xatom_INCR, |
| 773 | 32, PropModeReplace, |
| 774 | (unsigned char *) value, 1); |
| 775 | } |
| 776 | |
| 777 | XSelectInput (display, window, PropertyChangeMask); |
| 778 | |
| 779 | /* Tell 'em the INCR data is there... */ |
| 780 | TRACE0 ("Send SelectionNotify event"); |
| 781 | XSendEvent (display, window, False, 0L, (XEvent *) &reply); |
| 782 | XFlush (display); |
| 783 | |
| 784 | had_errors = x_had_errors_p (display); |
| 785 | UNBLOCK_INPUT; |
| 786 | |
| 787 | /* First, wait for the requester to ack by deleting the property. |
| 788 | This can run random lisp code (process handlers) or signal. */ |
| 789 | if (! had_errors) |
| 790 | { |
| 791 | TRACE1 ("Waiting for ACK (deletion of %s)", |
| 792 | XGetAtomName (display, reply.property)); |
| 793 | wait_for_property_change (wait_object); |
| 794 | } |
| 795 | else |
| 796 | unexpect_property_change (wait_object); |
| 797 | |
| 798 | TRACE0 ("Got ACK"); |
| 799 | while (bytes_remaining) |
| 800 | { |
| 801 | int i = ((bytes_remaining < max_bytes) |
| 802 | ? bytes_remaining |
| 803 | : max_bytes); |
| 804 | |
| 805 | BLOCK_INPUT; |
| 806 | |
| 807 | wait_object |
| 808 | = expect_property_change (display, window, reply.property, |
| 809 | PropertyDelete); |
| 810 | |
| 811 | TRACE1 ("Sending increment of %d bytes", i); |
| 812 | TRACE1 ("Set %s to increment data", |
| 813 | XGetAtomName (display, reply.property)); |
| 814 | |
| 815 | /* Append the next chunk of data to the property. */ |
| 816 | XChangeProperty (display, window, reply.property, type, format, |
| 817 | PropModeAppend, data, i / format_bytes); |
| 818 | bytes_remaining -= i; |
| 819 | data += i; |
| 820 | XFlush (display); |
| 821 | had_errors = x_had_errors_p (display); |
| 822 | UNBLOCK_INPUT; |
| 823 | |
| 824 | if (had_errors) |
| 825 | break; |
| 826 | |
| 827 | /* Now wait for the requester to ack this chunk by deleting the |
| 828 | property. This can run random lisp code or signal. */ |
| 829 | TRACE1 ("Waiting for increment ACK (deletion of %s)", |
| 830 | XGetAtomName (display, reply.property)); |
| 831 | wait_for_property_change (wait_object); |
| 832 | } |
| 833 | |
| 834 | /* Now write a zero-length chunk to the property to tell the |
| 835 | requester that we're done. */ |
| 836 | BLOCK_INPUT; |
| 837 | if (! waiting_for_other_props_on_window (display, window)) |
| 838 | XSelectInput (display, window, 0L); |
| 839 | |
| 840 | TRACE1 ("Set %s to a 0-length chunk to indicate EOF", |
| 841 | XGetAtomName (display, reply.property)); |
| 842 | XChangeProperty (display, window, reply.property, type, format, |
| 843 | PropModeReplace, data, 0); |
| 844 | TRACE0 ("Done sending incrementally"); |
| 845 | } |
| 846 | |
| 847 | /* rms, 2003-01-03: I think I have fixed this bug. */ |
| 848 | /* The window we're communicating with may have been deleted |
| 849 | in the meantime (that's a real situation from a bug report). |
| 850 | In this case, there may be events in the event queue still |
| 851 | refering to the deleted window, and we'll get a BadWindow error |
| 852 | in XTread_socket when processing the events. I don't have |
| 853 | an idea how to fix that. gerd, 2001-01-98. */ |
| 854 | /* 2004-09-10: XSync and UNBLOCK so that possible protocol errors are |
| 855 | delivered before uncatch errors. */ |
| 856 | XSync (display, False); |
| 857 | UNBLOCK_INPUT; |
| 858 | |
| 859 | /* GTK queues events in addition to the queue in Xlib. So we |
| 860 | UNBLOCK to enter the event loop and get possible errors delivered, |
| 861 | and then BLOCK again because x_uncatch_errors requires it. */ |
| 862 | BLOCK_INPUT; |
| 863 | x_uncatch_errors (display, count); |
| 864 | UNBLOCK_INPUT; |
| 865 | } |
| 866 | \f |
| 867 | /* Handle a SelectionRequest event EVENT. |
| 868 | This is called from keyboard.c when such an event is found in the queue. */ |
| 869 | |
| 870 | static void |
| 871 | x_handle_selection_request (event) |
| 872 | struct input_event *event; |
| 873 | { |
| 874 | struct gcpro gcpro1, gcpro2, gcpro3; |
| 875 | Lisp_Object local_selection_data; |
| 876 | Lisp_Object selection_symbol; |
| 877 | Lisp_Object target_symbol; |
| 878 | Lisp_Object converted_selection; |
| 879 | Time local_selection_time; |
| 880 | Lisp_Object successful_p; |
| 881 | int count; |
| 882 | struct x_display_info *dpyinfo |
| 883 | = x_display_info_for_display (SELECTION_EVENT_DISPLAY (event)); |
| 884 | |
| 885 | TRACE2 ("x_handle_selection_request, from=0x%08lx time=%lu", |
| 886 | (unsigned long) SELECTION_EVENT_REQUESTOR (event), |
| 887 | (unsigned long) SELECTION_EVENT_TIME (event)); |
| 888 | |
| 889 | local_selection_data = Qnil; |
| 890 | target_symbol = Qnil; |
| 891 | converted_selection = Qnil; |
| 892 | successful_p = Qnil; |
| 893 | |
| 894 | GCPRO3 (local_selection_data, converted_selection, target_symbol); |
| 895 | |
| 896 | selection_symbol = x_atom_to_symbol (SELECTION_EVENT_DISPLAY (event), |
| 897 | SELECTION_EVENT_SELECTION (event)); |
| 898 | |
| 899 | local_selection_data = assq_no_quit (selection_symbol, Vselection_alist); |
| 900 | |
| 901 | if (NILP (local_selection_data)) |
| 902 | { |
| 903 | /* Someone asked for the selection, but we don't have it any more. |
| 904 | */ |
| 905 | x_decline_selection_request (event); |
| 906 | goto DONE; |
| 907 | } |
| 908 | |
| 909 | local_selection_time = (Time) |
| 910 | cons_to_long (XCAR (XCDR (XCDR (local_selection_data)))); |
| 911 | |
| 912 | if (SELECTION_EVENT_TIME (event) != CurrentTime |
| 913 | && local_selection_time > SELECTION_EVENT_TIME (event)) |
| 914 | { |
| 915 | /* Someone asked for the selection, and we have one, but not the one |
| 916 | they're looking for. |
| 917 | */ |
| 918 | x_decline_selection_request (event); |
| 919 | goto DONE; |
| 920 | } |
| 921 | |
| 922 | x_selection_current_request = event; |
| 923 | count = SPECPDL_INDEX (); |
| 924 | selection_request_dpyinfo = dpyinfo; |
| 925 | record_unwind_protect (x_selection_request_lisp_error, Qnil); |
| 926 | |
| 927 | target_symbol = x_atom_to_symbol (SELECTION_EVENT_DISPLAY (event), |
| 928 | SELECTION_EVENT_TARGET (event)); |
| 929 | |
| 930 | #if 0 /* #### MULTIPLE doesn't work yet */ |
| 931 | if (EQ (target_symbol, QMULTIPLE)) |
| 932 | target_symbol = fetch_multiple_target (event); |
| 933 | #endif |
| 934 | |
| 935 | /* Convert lisp objects back into binary data */ |
| 936 | |
| 937 | converted_selection |
| 938 | = x_get_local_selection (selection_symbol, target_symbol, 0); |
| 939 | |
| 940 | if (! NILP (converted_selection)) |
| 941 | { |
| 942 | unsigned char *data; |
| 943 | unsigned int size; |
| 944 | int format; |
| 945 | Atom type; |
| 946 | int nofree; |
| 947 | |
| 948 | lisp_data_to_selection_data (SELECTION_EVENT_DISPLAY (event), |
| 949 | converted_selection, |
| 950 | &data, &type, &size, &format, &nofree); |
| 951 | |
| 952 | x_reply_selection_request (event, format, data, size, type); |
| 953 | successful_p = Qt; |
| 954 | |
| 955 | /* Indicate we have successfully processed this event. */ |
| 956 | x_selection_current_request = 0; |
| 957 | |
| 958 | /* Use xfree, not XFree, because lisp_data_to_selection_data |
| 959 | calls xmalloc itself. */ |
| 960 | if (!nofree) |
| 961 | xfree (data); |
| 962 | } |
| 963 | unbind_to (count, Qnil); |
| 964 | |
| 965 | DONE: |
| 966 | |
| 967 | /* Let random lisp code notice that the selection has been asked for. */ |
| 968 | { |
| 969 | Lisp_Object rest; |
| 970 | rest = Vx_sent_selection_functions; |
| 971 | if (!EQ (rest, Qunbound)) |
| 972 | for (; CONSP (rest); rest = Fcdr (rest)) |
| 973 | call3 (Fcar (rest), selection_symbol, target_symbol, successful_p); |
| 974 | } |
| 975 | |
| 976 | UNGCPRO; |
| 977 | } |
| 978 | \f |
| 979 | /* Handle a SelectionClear event EVENT, which indicates that some |
| 980 | client cleared out our previously asserted selection. |
| 981 | This is called from keyboard.c when such an event is found in the queue. */ |
| 982 | |
| 983 | static void |
| 984 | x_handle_selection_clear (event) |
| 985 | struct input_event *event; |
| 986 | { |
| 987 | Display *display = SELECTION_EVENT_DISPLAY (event); |
| 988 | Atom selection = SELECTION_EVENT_SELECTION (event); |
| 989 | Time changed_owner_time = SELECTION_EVENT_TIME (event); |
| 990 | |
| 991 | Lisp_Object selection_symbol, local_selection_data; |
| 992 | Time local_selection_time; |
| 993 | struct x_display_info *dpyinfo = x_display_info_for_display (display); |
| 994 | struct x_display_info *t_dpyinfo; |
| 995 | |
| 996 | TRACE0 ("x_handle_selection_clear"); |
| 997 | |
| 998 | /* If the new selection owner is also Emacs, |
| 999 | don't clear the new selection. */ |
| 1000 | BLOCK_INPUT; |
| 1001 | /* Check each display on the same terminal, |
| 1002 | to see if this Emacs job now owns the selection |
| 1003 | through that display. */ |
| 1004 | for (t_dpyinfo = x_display_list; t_dpyinfo; t_dpyinfo = t_dpyinfo->next) |
| 1005 | if (t_dpyinfo->kboard == dpyinfo->kboard) |
| 1006 | { |
| 1007 | Window owner_window |
| 1008 | = XGetSelectionOwner (t_dpyinfo->display, selection); |
| 1009 | if (x_window_to_frame (t_dpyinfo, owner_window) != 0) |
| 1010 | { |
| 1011 | UNBLOCK_INPUT; |
| 1012 | return; |
| 1013 | } |
| 1014 | } |
| 1015 | UNBLOCK_INPUT; |
| 1016 | |
| 1017 | selection_symbol = x_atom_to_symbol (display, selection); |
| 1018 | |
| 1019 | local_selection_data = assq_no_quit (selection_symbol, Vselection_alist); |
| 1020 | |
| 1021 | /* Well, we already believe that we don't own it, so that's just fine. */ |
| 1022 | if (NILP (local_selection_data)) return; |
| 1023 | |
| 1024 | local_selection_time = (Time) |
| 1025 | cons_to_long (XCAR (XCDR (XCDR (local_selection_data)))); |
| 1026 | |
| 1027 | /* This SelectionClear is for a selection that we no longer own, so we can |
| 1028 | disregard it. (That is, we have reasserted the selection since this |
| 1029 | request was generated.) */ |
| 1030 | |
| 1031 | if (changed_owner_time != CurrentTime |
| 1032 | && local_selection_time > changed_owner_time) |
| 1033 | return; |
| 1034 | |
| 1035 | /* Otherwise, we're really honest and truly being told to drop it. |
| 1036 | Don't use Fdelq as that may QUIT;. */ |
| 1037 | |
| 1038 | if (EQ (local_selection_data, Fcar (Vselection_alist))) |
| 1039 | Vselection_alist = Fcdr (Vselection_alist); |
| 1040 | else |
| 1041 | { |
| 1042 | Lisp_Object rest; |
| 1043 | for (rest = Vselection_alist; !NILP (rest); rest = Fcdr (rest)) |
| 1044 | if (EQ (local_selection_data, Fcar (XCDR (rest)))) |
| 1045 | { |
| 1046 | XSETCDR (rest, Fcdr (XCDR (rest))); |
| 1047 | break; |
| 1048 | } |
| 1049 | } |
| 1050 | |
| 1051 | /* Let random lisp code notice that the selection has been stolen. */ |
| 1052 | |
| 1053 | { |
| 1054 | Lisp_Object rest; |
| 1055 | rest = Vx_lost_selection_functions; |
| 1056 | if (!EQ (rest, Qunbound)) |
| 1057 | { |
| 1058 | for (; CONSP (rest); rest = Fcdr (rest)) |
| 1059 | call1 (Fcar (rest), selection_symbol); |
| 1060 | prepare_menu_bars (); |
| 1061 | redisplay_preserve_echo_area (20); |
| 1062 | } |
| 1063 | } |
| 1064 | } |
| 1065 | |
| 1066 | void |
| 1067 | x_handle_selection_event (event) |
| 1068 | struct input_event *event; |
| 1069 | { |
| 1070 | TRACE0 ("x_handle_selection_event"); |
| 1071 | |
| 1072 | if (event->kind == SELECTION_REQUEST_EVENT) |
| 1073 | { |
| 1074 | if (x_queue_selection_requests) |
| 1075 | x_queue_event (event); |
| 1076 | else |
| 1077 | x_handle_selection_request (event); |
| 1078 | } |
| 1079 | else |
| 1080 | x_handle_selection_clear (event); |
| 1081 | } |
| 1082 | |
| 1083 | |
| 1084 | /* Clear all selections that were made from frame F. |
| 1085 | We do this when about to delete a frame. */ |
| 1086 | |
| 1087 | void |
| 1088 | x_clear_frame_selections (f) |
| 1089 | FRAME_PTR f; |
| 1090 | { |
| 1091 | Lisp_Object frame; |
| 1092 | Lisp_Object rest; |
| 1093 | |
| 1094 | XSETFRAME (frame, f); |
| 1095 | |
| 1096 | /* Otherwise, we're really honest and truly being told to drop it. |
| 1097 | Don't use Fdelq as that may QUIT;. */ |
| 1098 | |
| 1099 | /* Delete elements from the beginning of Vselection_alist. */ |
| 1100 | while (!NILP (Vselection_alist) |
| 1101 | && EQ (frame, Fcar (Fcdr (Fcdr (Fcdr (Fcar (Vselection_alist))))))) |
| 1102 | { |
| 1103 | /* Let random Lisp code notice that the selection has been stolen. */ |
| 1104 | Lisp_Object hooks, selection_symbol; |
| 1105 | |
| 1106 | hooks = Vx_lost_selection_functions; |
| 1107 | selection_symbol = Fcar (Fcar (Vselection_alist)); |
| 1108 | |
| 1109 | if (!EQ (hooks, Qunbound)) |
| 1110 | { |
| 1111 | for (; CONSP (hooks); hooks = Fcdr (hooks)) |
| 1112 | call1 (Fcar (hooks), selection_symbol); |
| 1113 | #if 0 /* This can crash when deleting a frame |
| 1114 | from x_connection_closed. Anyway, it seems unnecessary; |
| 1115 | something else should cause a redisplay. */ |
| 1116 | redisplay_preserve_echo_area (21); |
| 1117 | #endif |
| 1118 | } |
| 1119 | |
| 1120 | Vselection_alist = Fcdr (Vselection_alist); |
| 1121 | } |
| 1122 | |
| 1123 | /* Delete elements after the beginning of Vselection_alist. */ |
| 1124 | for (rest = Vselection_alist; !NILP (rest); rest = Fcdr (rest)) |
| 1125 | if (EQ (frame, Fcar (Fcdr (Fcdr (Fcdr (Fcar (XCDR (rest)))))))) |
| 1126 | { |
| 1127 | /* Let random Lisp code notice that the selection has been stolen. */ |
| 1128 | Lisp_Object hooks, selection_symbol; |
| 1129 | |
| 1130 | hooks = Vx_lost_selection_functions; |
| 1131 | selection_symbol = Fcar (Fcar (XCDR (rest))); |
| 1132 | |
| 1133 | if (!EQ (hooks, Qunbound)) |
| 1134 | { |
| 1135 | for (; CONSP (hooks); hooks = Fcdr (hooks)) |
| 1136 | call1 (Fcar (hooks), selection_symbol); |
| 1137 | #if 0 /* See above */ |
| 1138 | redisplay_preserve_echo_area (22); |
| 1139 | #endif |
| 1140 | } |
| 1141 | XSETCDR (rest, Fcdr (XCDR (rest))); |
| 1142 | break; |
| 1143 | } |
| 1144 | } |
| 1145 | \f |
| 1146 | /* Nonzero if any properties for DISPLAY and WINDOW |
| 1147 | are on the list of what we are waiting for. */ |
| 1148 | |
| 1149 | static int |
| 1150 | waiting_for_other_props_on_window (display, window) |
| 1151 | Display *display; |
| 1152 | Window window; |
| 1153 | { |
| 1154 | struct prop_location *rest = property_change_wait_list; |
| 1155 | while (rest) |
| 1156 | if (rest->display == display && rest->window == window) |
| 1157 | return 1; |
| 1158 | else |
| 1159 | rest = rest->next; |
| 1160 | return 0; |
| 1161 | } |
| 1162 | |
| 1163 | /* Add an entry to the list of property changes we are waiting for. |
| 1164 | DISPLAY, WINDOW, PROPERTY, STATE describe what we will wait for. |
| 1165 | The return value is a number that uniquely identifies |
| 1166 | this awaited property change. */ |
| 1167 | |
| 1168 | static struct prop_location * |
| 1169 | expect_property_change (display, window, property, state) |
| 1170 | Display *display; |
| 1171 | Window window; |
| 1172 | Atom property; |
| 1173 | int state; |
| 1174 | { |
| 1175 | struct prop_location *pl = (struct prop_location *) xmalloc (sizeof *pl); |
| 1176 | pl->identifier = ++prop_location_identifier; |
| 1177 | pl->display = display; |
| 1178 | pl->window = window; |
| 1179 | pl->property = property; |
| 1180 | pl->desired_state = state; |
| 1181 | pl->next = property_change_wait_list; |
| 1182 | pl->arrived = 0; |
| 1183 | property_change_wait_list = pl; |
| 1184 | return pl; |
| 1185 | } |
| 1186 | |
| 1187 | /* Delete an entry from the list of property changes we are waiting for. |
| 1188 | IDENTIFIER is the number that uniquely identifies the entry. */ |
| 1189 | |
| 1190 | static void |
| 1191 | unexpect_property_change (location) |
| 1192 | struct prop_location *location; |
| 1193 | { |
| 1194 | struct prop_location *prev = 0, *rest = property_change_wait_list; |
| 1195 | while (rest) |
| 1196 | { |
| 1197 | if (rest == location) |
| 1198 | { |
| 1199 | if (prev) |
| 1200 | prev->next = rest->next; |
| 1201 | else |
| 1202 | property_change_wait_list = rest->next; |
| 1203 | xfree (rest); |
| 1204 | return; |
| 1205 | } |
| 1206 | prev = rest; |
| 1207 | rest = rest->next; |
| 1208 | } |
| 1209 | } |
| 1210 | |
| 1211 | /* Remove the property change expectation element for IDENTIFIER. */ |
| 1212 | |
| 1213 | static Lisp_Object |
| 1214 | wait_for_property_change_unwind (loc) |
| 1215 | Lisp_Object loc; |
| 1216 | { |
| 1217 | struct prop_location *location = XSAVE_VALUE (loc)->pointer; |
| 1218 | |
| 1219 | unexpect_property_change (location); |
| 1220 | if (location == property_change_reply_object) |
| 1221 | property_change_reply_object = 0; |
| 1222 | return Qnil; |
| 1223 | } |
| 1224 | |
| 1225 | /* Actually wait for a property change. |
| 1226 | IDENTIFIER should be the value that expect_property_change returned. */ |
| 1227 | |
| 1228 | static void |
| 1229 | wait_for_property_change (location) |
| 1230 | struct prop_location *location; |
| 1231 | { |
| 1232 | int secs, usecs; |
| 1233 | int count = SPECPDL_INDEX (); |
| 1234 | |
| 1235 | if (property_change_reply_object) |
| 1236 | abort (); |
| 1237 | |
| 1238 | /* Make sure to do unexpect_property_change if we quit or err. */ |
| 1239 | record_unwind_protect (wait_for_property_change_unwind, |
| 1240 | make_save_value (location, 0)); |
| 1241 | |
| 1242 | XSETCAR (property_change_reply, Qnil); |
| 1243 | property_change_reply_object = location; |
| 1244 | |
| 1245 | /* If the event we are waiting for arrives beyond here, it will set |
| 1246 | property_change_reply, because property_change_reply_object says so. */ |
| 1247 | if (! location->arrived) |
| 1248 | { |
| 1249 | secs = x_selection_timeout / 1000; |
| 1250 | usecs = (x_selection_timeout % 1000) * 1000; |
| 1251 | TRACE2 (" Waiting %d secs, %d usecs", secs, usecs); |
| 1252 | wait_reading_process_output (secs, usecs, 0, 0, |
| 1253 | property_change_reply, NULL, 0); |
| 1254 | |
| 1255 | if (NILP (XCAR (property_change_reply))) |
| 1256 | { |
| 1257 | TRACE0 (" Timed out"); |
| 1258 | error ("Timed out waiting for property-notify event"); |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | unbind_to (count, Qnil); |
| 1263 | } |
| 1264 | |
| 1265 | /* Called from XTread_socket in response to a PropertyNotify event. */ |
| 1266 | |
| 1267 | void |
| 1268 | x_handle_property_notify (event) |
| 1269 | XPropertyEvent *event; |
| 1270 | { |
| 1271 | struct prop_location *prev = 0, *rest = property_change_wait_list; |
| 1272 | |
| 1273 | while (rest) |
| 1274 | { |
| 1275 | if (!rest->arrived |
| 1276 | && rest->property == event->atom |
| 1277 | && rest->window == event->window |
| 1278 | && rest->display == event->display |
| 1279 | && rest->desired_state == event->state) |
| 1280 | { |
| 1281 | TRACE2 ("Expected %s of property %s", |
| 1282 | (event->state == PropertyDelete ? "deletion" : "change"), |
| 1283 | XGetAtomName (event->display, event->atom)); |
| 1284 | |
| 1285 | rest->arrived = 1; |
| 1286 | |
| 1287 | /* If this is the one wait_for_property_change is waiting for, |
| 1288 | tell it to wake up. */ |
| 1289 | if (rest == property_change_reply_object) |
| 1290 | XSETCAR (property_change_reply, Qt); |
| 1291 | |
| 1292 | return; |
| 1293 | } |
| 1294 | |
| 1295 | prev = rest; |
| 1296 | rest = rest->next; |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | |
| 1301 | \f |
| 1302 | #if 0 /* #### MULTIPLE doesn't work yet */ |
| 1303 | |
| 1304 | static Lisp_Object |
| 1305 | fetch_multiple_target (event) |
| 1306 | XSelectionRequestEvent *event; |
| 1307 | { |
| 1308 | Display *display = event->display; |
| 1309 | Window window = event->requestor; |
| 1310 | Atom target = event->target; |
| 1311 | Atom selection_atom = event->selection; |
| 1312 | int result; |
| 1313 | |
| 1314 | return |
| 1315 | Fcons (QMULTIPLE, |
| 1316 | x_get_window_property_as_lisp_data (display, window, target, |
| 1317 | QMULTIPLE, selection_atom)); |
| 1318 | } |
| 1319 | |
| 1320 | static Lisp_Object |
| 1321 | copy_multiple_data (obj) |
| 1322 | Lisp_Object obj; |
| 1323 | { |
| 1324 | Lisp_Object vec; |
| 1325 | int i; |
| 1326 | int size; |
| 1327 | if (CONSP (obj)) |
| 1328 | return Fcons (XCAR (obj), copy_multiple_data (XCDR (obj))); |
| 1329 | |
| 1330 | CHECK_VECTOR (obj); |
| 1331 | vec = Fmake_vector (size = XVECTOR (obj)->size, Qnil); |
| 1332 | for (i = 0; i < size; i++) |
| 1333 | { |
| 1334 | Lisp_Object vec2 = XVECTOR (obj)->contents [i]; |
| 1335 | CHECK_VECTOR (vec2); |
| 1336 | if (XVECTOR (vec2)->size != 2) |
| 1337 | /* ??? Confusing error message */ |
| 1338 | Fsignal (Qerror, Fcons (build_string ("vectors must be of length 2"), |
| 1339 | Fcons (vec2, Qnil))); |
| 1340 | XVECTOR (vec)->contents [i] = Fmake_vector (2, Qnil); |
| 1341 | XVECTOR (XVECTOR (vec)->contents [i])->contents [0] |
| 1342 | = XVECTOR (vec2)->contents [0]; |
| 1343 | XVECTOR (XVECTOR (vec)->contents [i])->contents [1] |
| 1344 | = XVECTOR (vec2)->contents [1]; |
| 1345 | } |
| 1346 | return vec; |
| 1347 | } |
| 1348 | |
| 1349 | #endif |
| 1350 | |
| 1351 | \f |
| 1352 | /* Variables for communication with x_handle_selection_notify. */ |
| 1353 | static Atom reading_which_selection; |
| 1354 | static Lisp_Object reading_selection_reply; |
| 1355 | static Window reading_selection_window; |
| 1356 | |
| 1357 | /* Do protocol to read selection-data from the server. |
| 1358 | Converts this to Lisp data and returns it. */ |
| 1359 | |
| 1360 | static Lisp_Object |
| 1361 | x_get_foreign_selection (selection_symbol, target_type, time_stamp) |
| 1362 | Lisp_Object selection_symbol, target_type, time_stamp; |
| 1363 | { |
| 1364 | struct frame *sf = SELECTED_FRAME (); |
| 1365 | Window requestor_window = FRAME_X_WINDOW (sf); |
| 1366 | Display *display = FRAME_X_DISPLAY (sf); |
| 1367 | struct x_display_info *dpyinfo = FRAME_X_DISPLAY_INFO (sf); |
| 1368 | Time requestor_time = last_event_timestamp; |
| 1369 | Atom target_property = dpyinfo->Xatom_EMACS_TMP; |
| 1370 | Atom selection_atom = symbol_to_x_atom (dpyinfo, display, selection_symbol); |
| 1371 | Atom type_atom; |
| 1372 | int secs, usecs; |
| 1373 | int count; |
| 1374 | Lisp_Object frame; |
| 1375 | |
| 1376 | if (CONSP (target_type)) |
| 1377 | type_atom = symbol_to_x_atom (dpyinfo, display, XCAR (target_type)); |
| 1378 | else |
| 1379 | type_atom = symbol_to_x_atom (dpyinfo, display, target_type); |
| 1380 | |
| 1381 | if (! NILP (time_stamp)) |
| 1382 | { |
| 1383 | if (CONSP (time_stamp)) |
| 1384 | requestor_time = (Time) cons_to_long (time_stamp); |
| 1385 | else if (INTEGERP (time_stamp)) |
| 1386 | requestor_time = (Time) XUINT (time_stamp); |
| 1387 | else if (FLOATP (time_stamp)) |
| 1388 | requestor_time = (Time) XFLOAT_DATA (time_stamp); |
| 1389 | else |
| 1390 | error ("TIME_STAMP must be cons or number"); |
| 1391 | } |
| 1392 | |
| 1393 | BLOCK_INPUT; |
| 1394 | |
| 1395 | count = x_catch_errors (display); |
| 1396 | |
| 1397 | TRACE2 ("Get selection %s, type %s", |
| 1398 | XGetAtomName (display, type_atom), |
| 1399 | XGetAtomName (display, target_property)); |
| 1400 | |
| 1401 | XConvertSelection (display, selection_atom, type_atom, target_property, |
| 1402 | requestor_window, requestor_time); |
| 1403 | XFlush (display); |
| 1404 | |
| 1405 | /* Prepare to block until the reply has been read. */ |
| 1406 | reading_selection_window = requestor_window; |
| 1407 | reading_which_selection = selection_atom; |
| 1408 | XSETCAR (reading_selection_reply, Qnil); |
| 1409 | |
| 1410 | frame = some_frame_on_display (dpyinfo); |
| 1411 | |
| 1412 | /* If the display no longer has frames, we can't expect |
| 1413 | to get many more selection requests from it, so don't |
| 1414 | bother trying to queue them. */ |
| 1415 | if (!NILP (frame)) |
| 1416 | { |
| 1417 | x_start_queuing_selection_requests (); |
| 1418 | |
| 1419 | record_unwind_protect (queue_selection_requests_unwind, |
| 1420 | Qnil); |
| 1421 | } |
| 1422 | UNBLOCK_INPUT; |
| 1423 | |
| 1424 | /* This allows quits. Also, don't wait forever. */ |
| 1425 | secs = x_selection_timeout / 1000; |
| 1426 | usecs = (x_selection_timeout % 1000) * 1000; |
| 1427 | TRACE1 (" Start waiting %d secs for SelectionNotify", secs); |
| 1428 | wait_reading_process_output (secs, usecs, 0, 0, |
| 1429 | reading_selection_reply, NULL, 0); |
| 1430 | TRACE1 (" Got event = %d", !NILP (XCAR (reading_selection_reply))); |
| 1431 | |
| 1432 | BLOCK_INPUT; |
| 1433 | x_check_errors (display, "Cannot get selection: %s"); |
| 1434 | x_uncatch_errors (display, count); |
| 1435 | UNBLOCK_INPUT; |
| 1436 | |
| 1437 | if (NILP (XCAR (reading_selection_reply))) |
| 1438 | error ("Timed out waiting for reply from selection owner"); |
| 1439 | if (EQ (XCAR (reading_selection_reply), Qlambda)) |
| 1440 | error ("No `%s' selection", SDATA (SYMBOL_NAME (selection_symbol))); |
| 1441 | |
| 1442 | /* Otherwise, the selection is waiting for us on the requested property. */ |
| 1443 | return |
| 1444 | x_get_window_property_as_lisp_data (display, requestor_window, |
| 1445 | target_property, target_type, |
| 1446 | selection_atom); |
| 1447 | } |
| 1448 | \f |
| 1449 | /* Subroutines of x_get_window_property_as_lisp_data */ |
| 1450 | |
| 1451 | /* Use xfree, not XFree, to free the data obtained with this function. */ |
| 1452 | |
| 1453 | static void |
| 1454 | x_get_window_property (display, window, property, data_ret, bytes_ret, |
| 1455 | actual_type_ret, actual_format_ret, actual_size_ret, |
| 1456 | delete_p) |
| 1457 | Display *display; |
| 1458 | Window window; |
| 1459 | Atom property; |
| 1460 | unsigned char **data_ret; |
| 1461 | int *bytes_ret; |
| 1462 | Atom *actual_type_ret; |
| 1463 | int *actual_format_ret; |
| 1464 | unsigned long *actual_size_ret; |
| 1465 | int delete_p; |
| 1466 | { |
| 1467 | int total_size; |
| 1468 | unsigned long bytes_remaining; |
| 1469 | int offset = 0; |
| 1470 | unsigned char *tmp_data = 0; |
| 1471 | int result; |
| 1472 | int buffer_size = SELECTION_QUANTUM (display); |
| 1473 | |
| 1474 | if (buffer_size > MAX_SELECTION_QUANTUM) |
| 1475 | buffer_size = MAX_SELECTION_QUANTUM; |
| 1476 | |
| 1477 | BLOCK_INPUT; |
| 1478 | |
| 1479 | /* First probe the thing to find out how big it is. */ |
| 1480 | result = XGetWindowProperty (display, window, property, |
| 1481 | 0L, 0L, False, AnyPropertyType, |
| 1482 | actual_type_ret, actual_format_ret, |
| 1483 | actual_size_ret, |
| 1484 | &bytes_remaining, &tmp_data); |
| 1485 | if (result != Success) |
| 1486 | { |
| 1487 | UNBLOCK_INPUT; |
| 1488 | *data_ret = 0; |
| 1489 | *bytes_ret = 0; |
| 1490 | return; |
| 1491 | } |
| 1492 | |
| 1493 | /* This was allocated by Xlib, so use XFree. */ |
| 1494 | XFree ((char *) tmp_data); |
| 1495 | |
| 1496 | if (*actual_type_ret == None || *actual_format_ret == 0) |
| 1497 | { |
| 1498 | UNBLOCK_INPUT; |
| 1499 | return; |
| 1500 | } |
| 1501 | |
| 1502 | total_size = bytes_remaining + 1; |
| 1503 | *data_ret = (unsigned char *) xmalloc (total_size); |
| 1504 | |
| 1505 | /* Now read, until we've gotten it all. */ |
| 1506 | while (bytes_remaining) |
| 1507 | { |
| 1508 | #ifdef TRACE_SELECTION |
| 1509 | int last = bytes_remaining; |
| 1510 | #endif |
| 1511 | result |
| 1512 | = XGetWindowProperty (display, window, property, |
| 1513 | (long)offset/4, (long)buffer_size/4, |
| 1514 | False, |
| 1515 | AnyPropertyType, |
| 1516 | actual_type_ret, actual_format_ret, |
| 1517 | actual_size_ret, &bytes_remaining, &tmp_data); |
| 1518 | |
| 1519 | TRACE2 ("Read %ld bytes from property %s", |
| 1520 | last - bytes_remaining, |
| 1521 | XGetAtomName (display, property)); |
| 1522 | |
| 1523 | /* If this doesn't return Success at this point, it means that |
| 1524 | some clod deleted the selection while we were in the midst of |
| 1525 | reading it. Deal with that, I guess.... */ |
| 1526 | if (result != Success) |
| 1527 | break; |
| 1528 | |
| 1529 | /* The man page for XGetWindowProperty says: |
| 1530 | "If the returned format is 32, the returned data is represented |
| 1531 | as a long array and should be cast to that type to obtain the |
| 1532 | elements." |
| 1533 | This applies even if long is more than 32 bits, the X library |
| 1534 | converts from 32 bit elements received from the X server to long |
| 1535 | and passes the long array to us. Thus, for that case bcopy can not |
| 1536 | be used. We convert to a 32 bit type here, because so much code |
| 1537 | assume on that. |
| 1538 | |
| 1539 | The bytes and offsets passed to XGetWindowProperty refers to the |
| 1540 | property and those are indeed in 32 bit quantities if format is 32. */ |
| 1541 | |
| 1542 | if (*actual_format_ret == 32 && *actual_format_ret < BITS_PER_LONG) |
| 1543 | { |
| 1544 | unsigned long i; |
| 1545 | int *idata = (int *) ((*data_ret) + offset); |
| 1546 | long *ldata = (long *) tmp_data; |
| 1547 | |
| 1548 | for (i = 0; i < *actual_size_ret; ++i) |
| 1549 | { |
| 1550 | idata[i]= (int) ldata[i]; |
| 1551 | offset += 4; |
| 1552 | } |
| 1553 | } |
| 1554 | else |
| 1555 | { |
| 1556 | *actual_size_ret *= *actual_format_ret / 8; |
| 1557 | bcopy (tmp_data, (*data_ret) + offset, *actual_size_ret); |
| 1558 | offset += *actual_size_ret; |
| 1559 | } |
| 1560 | |
| 1561 | /* This was allocated by Xlib, so use XFree. */ |
| 1562 | XFree ((char *) tmp_data); |
| 1563 | } |
| 1564 | |
| 1565 | XFlush (display); |
| 1566 | UNBLOCK_INPUT; |
| 1567 | *bytes_ret = offset; |
| 1568 | } |
| 1569 | \f |
| 1570 | /* Use xfree, not XFree, to free the data obtained with this function. */ |
| 1571 | |
| 1572 | static void |
| 1573 | receive_incremental_selection (display, window, property, target_type, |
| 1574 | min_size_bytes, data_ret, size_bytes_ret, |
| 1575 | type_ret, format_ret, size_ret) |
| 1576 | Display *display; |
| 1577 | Window window; |
| 1578 | Atom property; |
| 1579 | Lisp_Object target_type; /* for error messages only */ |
| 1580 | unsigned int min_size_bytes; |
| 1581 | unsigned char **data_ret; |
| 1582 | int *size_bytes_ret; |
| 1583 | Atom *type_ret; |
| 1584 | unsigned long *size_ret; |
| 1585 | int *format_ret; |
| 1586 | { |
| 1587 | int offset = 0; |
| 1588 | struct prop_location *wait_object; |
| 1589 | *size_bytes_ret = min_size_bytes; |
| 1590 | *data_ret = (unsigned char *) xmalloc (*size_bytes_ret); |
| 1591 | |
| 1592 | TRACE1 ("Read %d bytes incrementally", min_size_bytes); |
| 1593 | |
| 1594 | /* At this point, we have read an INCR property. |
| 1595 | Delete the property to ack it. |
| 1596 | (But first, prepare to receive the next event in this handshake.) |
| 1597 | |
| 1598 | Now, we must loop, waiting for the sending window to put a value on |
| 1599 | that property, then reading the property, then deleting it to ack. |
| 1600 | We are done when the sender places a property of length 0. |
| 1601 | */ |
| 1602 | BLOCK_INPUT; |
| 1603 | XSelectInput (display, window, STANDARD_EVENT_SET | PropertyChangeMask); |
| 1604 | TRACE1 (" Delete property %s", |
| 1605 | SDATA (SYMBOL_NAME (x_atom_to_symbol (display, property)))); |
| 1606 | XDeleteProperty (display, window, property); |
| 1607 | TRACE1 (" Expect new value of property %s", |
| 1608 | SDATA (SYMBOL_NAME (x_atom_to_symbol (display, property)))); |
| 1609 | wait_object = expect_property_change (display, window, property, |
| 1610 | PropertyNewValue); |
| 1611 | XFlush (display); |
| 1612 | UNBLOCK_INPUT; |
| 1613 | |
| 1614 | while (1) |
| 1615 | { |
| 1616 | unsigned char *tmp_data; |
| 1617 | int tmp_size_bytes; |
| 1618 | |
| 1619 | TRACE0 (" Wait for property change"); |
| 1620 | wait_for_property_change (wait_object); |
| 1621 | |
| 1622 | /* expect it again immediately, because x_get_window_property may |
| 1623 | .. no it won't, I don't get it. |
| 1624 | .. Ok, I get it now, the Xt code that implements INCR is broken. */ |
| 1625 | TRACE0 (" Get property value"); |
| 1626 | x_get_window_property (display, window, property, |
| 1627 | &tmp_data, &tmp_size_bytes, |
| 1628 | type_ret, format_ret, size_ret, 1); |
| 1629 | |
| 1630 | TRACE1 (" Read increment of %d bytes", tmp_size_bytes); |
| 1631 | |
| 1632 | if (tmp_size_bytes == 0) /* we're done */ |
| 1633 | { |
| 1634 | TRACE0 ("Done reading incrementally"); |
| 1635 | |
| 1636 | if (! waiting_for_other_props_on_window (display, window)) |
| 1637 | XSelectInput (display, window, STANDARD_EVENT_SET); |
| 1638 | /* Use xfree, not XFree, because x_get_window_property |
| 1639 | calls xmalloc itself. */ |
| 1640 | if (tmp_data) xfree (tmp_data); |
| 1641 | break; |
| 1642 | } |
| 1643 | |
| 1644 | BLOCK_INPUT; |
| 1645 | TRACE1 (" ACK by deleting property %s", |
| 1646 | XGetAtomName (display, property)); |
| 1647 | XDeleteProperty (display, window, property); |
| 1648 | wait_object = expect_property_change (display, window, property, |
| 1649 | PropertyNewValue); |
| 1650 | XFlush (display); |
| 1651 | UNBLOCK_INPUT; |
| 1652 | |
| 1653 | if (*size_bytes_ret < offset + tmp_size_bytes) |
| 1654 | { |
| 1655 | *size_bytes_ret = offset + tmp_size_bytes; |
| 1656 | *data_ret = (unsigned char *) xrealloc (*data_ret, *size_bytes_ret); |
| 1657 | } |
| 1658 | |
| 1659 | bcopy (tmp_data, (*data_ret) + offset, tmp_size_bytes); |
| 1660 | offset += tmp_size_bytes; |
| 1661 | |
| 1662 | /* Use xfree, not XFree, because x_get_window_property |
| 1663 | calls xmalloc itself. */ |
| 1664 | xfree (tmp_data); |
| 1665 | } |
| 1666 | } |
| 1667 | |
| 1668 | \f |
| 1669 | /* Once a requested selection is "ready" (we got a SelectionNotify event), |
| 1670 | fetch value from property PROPERTY of X window WINDOW on display DISPLAY. |
| 1671 | TARGET_TYPE and SELECTION_ATOM are used in error message if this fails. */ |
| 1672 | |
| 1673 | static Lisp_Object |
| 1674 | x_get_window_property_as_lisp_data (display, window, property, target_type, |
| 1675 | selection_atom) |
| 1676 | Display *display; |
| 1677 | Window window; |
| 1678 | Atom property; |
| 1679 | Lisp_Object target_type; /* for error messages only */ |
| 1680 | Atom selection_atom; /* for error messages only */ |
| 1681 | { |
| 1682 | Atom actual_type; |
| 1683 | int actual_format; |
| 1684 | unsigned long actual_size; |
| 1685 | unsigned char *data = 0; |
| 1686 | int bytes = 0; |
| 1687 | Lisp_Object val; |
| 1688 | struct x_display_info *dpyinfo = x_display_info_for_display (display); |
| 1689 | |
| 1690 | TRACE0 ("Reading selection data"); |
| 1691 | |
| 1692 | x_get_window_property (display, window, property, &data, &bytes, |
| 1693 | &actual_type, &actual_format, &actual_size, 1); |
| 1694 | if (! data) |
| 1695 | { |
| 1696 | int there_is_a_selection_owner; |
| 1697 | BLOCK_INPUT; |
| 1698 | there_is_a_selection_owner |
| 1699 | = XGetSelectionOwner (display, selection_atom); |
| 1700 | UNBLOCK_INPUT; |
| 1701 | Fsignal (Qerror, |
| 1702 | there_is_a_selection_owner |
| 1703 | ? Fcons (build_string ("selection owner couldn't convert"), |
| 1704 | actual_type |
| 1705 | ? Fcons (target_type, |
| 1706 | Fcons (x_atom_to_symbol (display, |
| 1707 | actual_type), |
| 1708 | Qnil)) |
| 1709 | : Fcons (target_type, Qnil)) |
| 1710 | : Fcons (build_string ("no selection"), |
| 1711 | Fcons (x_atom_to_symbol (display, |
| 1712 | selection_atom), |
| 1713 | Qnil))); |
| 1714 | } |
| 1715 | |
| 1716 | if (actual_type == dpyinfo->Xatom_INCR) |
| 1717 | { |
| 1718 | /* That wasn't really the data, just the beginning. */ |
| 1719 | |
| 1720 | unsigned int min_size_bytes = * ((unsigned int *) data); |
| 1721 | BLOCK_INPUT; |
| 1722 | /* Use xfree, not XFree, because x_get_window_property |
| 1723 | calls xmalloc itself. */ |
| 1724 | xfree ((char *) data); |
| 1725 | UNBLOCK_INPUT; |
| 1726 | receive_incremental_selection (display, window, property, target_type, |
| 1727 | min_size_bytes, &data, &bytes, |
| 1728 | &actual_type, &actual_format, |
| 1729 | &actual_size); |
| 1730 | } |
| 1731 | |
| 1732 | BLOCK_INPUT; |
| 1733 | TRACE1 (" Delete property %s", XGetAtomName (display, property)); |
| 1734 | XDeleteProperty (display, window, property); |
| 1735 | XFlush (display); |
| 1736 | UNBLOCK_INPUT; |
| 1737 | |
| 1738 | /* It's been read. Now convert it to a lisp object in some semi-rational |
| 1739 | manner. */ |
| 1740 | val = selection_data_to_lisp_data (display, data, bytes, |
| 1741 | actual_type, actual_format); |
| 1742 | |
| 1743 | /* Use xfree, not XFree, because x_get_window_property |
| 1744 | calls xmalloc itself. */ |
| 1745 | xfree ((char *) data); |
| 1746 | return val; |
| 1747 | } |
| 1748 | \f |
| 1749 | /* These functions convert from the selection data read from the server into |
| 1750 | something that we can use from Lisp, and vice versa. |
| 1751 | |
| 1752 | Type: Format: Size: Lisp Type: |
| 1753 | ----- ------- ----- ----------- |
| 1754 | * 8 * String |
| 1755 | ATOM 32 1 Symbol |
| 1756 | ATOM 32 > 1 Vector of Symbols |
| 1757 | * 16 1 Integer |
| 1758 | * 16 > 1 Vector of Integers |
| 1759 | * 32 1 if <=16 bits: Integer |
| 1760 | if > 16 bits: Cons of top16, bot16 |
| 1761 | * 32 > 1 Vector of the above |
| 1762 | |
| 1763 | When converting a Lisp number to C, it is assumed to be of format 16 if |
| 1764 | it is an integer, and of format 32 if it is a cons of two integers. |
| 1765 | |
| 1766 | When converting a vector of numbers from Lisp to C, it is assumed to be |
| 1767 | of format 16 if every element in the vector is an integer, and is assumed |
| 1768 | to be of format 32 if any element is a cons of two integers. |
| 1769 | |
| 1770 | When converting an object to C, it may be of the form (SYMBOL . <data>) |
| 1771 | where SYMBOL is what we should claim that the type is. Format and |
| 1772 | representation are as above. */ |
| 1773 | |
| 1774 | |
| 1775 | |
| 1776 | static Lisp_Object |
| 1777 | selection_data_to_lisp_data (display, data, size, type, format) |
| 1778 | Display *display; |
| 1779 | unsigned char *data; |
| 1780 | Atom type; |
| 1781 | int size, format; |
| 1782 | { |
| 1783 | struct x_display_info *dpyinfo = x_display_info_for_display (display); |
| 1784 | |
| 1785 | if (type == dpyinfo->Xatom_NULL) |
| 1786 | return QNULL; |
| 1787 | |
| 1788 | /* Convert any 8-bit data to a string, for compactness. */ |
| 1789 | else if (format == 8) |
| 1790 | { |
| 1791 | Lisp_Object str, lispy_type; |
| 1792 | |
| 1793 | str = make_unibyte_string ((char *) data, size); |
| 1794 | /* Indicate that this string is from foreign selection by a text |
| 1795 | property `foreign-selection' so that the caller of |
| 1796 | x-get-selection-internal (usually x-get-selection) can know |
| 1797 | that the string must be decode. */ |
| 1798 | if (type == dpyinfo->Xatom_COMPOUND_TEXT) |
| 1799 | lispy_type = QCOMPOUND_TEXT; |
| 1800 | else if (type == dpyinfo->Xatom_UTF8_STRING) |
| 1801 | lispy_type = QUTF8_STRING; |
| 1802 | else |
| 1803 | lispy_type = QSTRING; |
| 1804 | Fput_text_property (make_number (0), make_number (size), |
| 1805 | Qforeign_selection, lispy_type, str); |
| 1806 | return str; |
| 1807 | } |
| 1808 | /* Convert a single atom to a Lisp_Symbol. Convert a set of atoms to |
| 1809 | a vector of symbols. |
| 1810 | */ |
| 1811 | else if (type == XA_ATOM) |
| 1812 | { |
| 1813 | int i; |
| 1814 | if (size == sizeof (Atom)) |
| 1815 | return x_atom_to_symbol (display, *((Atom *) data)); |
| 1816 | else |
| 1817 | { |
| 1818 | Lisp_Object v = Fmake_vector (make_number (size / sizeof (Atom)), |
| 1819 | make_number (0)); |
| 1820 | for (i = 0; i < size / sizeof (Atom); i++) |
| 1821 | Faset (v, make_number (i), |
| 1822 | x_atom_to_symbol (display, ((Atom *) data) [i])); |
| 1823 | return v; |
| 1824 | } |
| 1825 | } |
| 1826 | |
| 1827 | /* Convert a single 16 or small 32 bit number to a Lisp_Int. |
| 1828 | If the number is > 16 bits, convert it to a cons of integers, |
| 1829 | 16 bits in each half. |
| 1830 | */ |
| 1831 | else if (format == 32 && size == sizeof (int)) |
| 1832 | return long_to_cons (((unsigned int *) data) [0]); |
| 1833 | else if (format == 16 && size == sizeof (short)) |
| 1834 | return make_number ((int) (((unsigned short *) data) [0])); |
| 1835 | |
| 1836 | /* Convert any other kind of data to a vector of numbers, represented |
| 1837 | as above (as an integer, or a cons of two 16 bit integers.) |
| 1838 | */ |
| 1839 | else if (format == 16) |
| 1840 | { |
| 1841 | int i; |
| 1842 | Lisp_Object v; |
| 1843 | v = Fmake_vector (make_number (size / 2), make_number (0)); |
| 1844 | for (i = 0; i < size / 2; i++) |
| 1845 | { |
| 1846 | int j = (int) ((unsigned short *) data) [i]; |
| 1847 | Faset (v, make_number (i), make_number (j)); |
| 1848 | } |
| 1849 | return v; |
| 1850 | } |
| 1851 | else |
| 1852 | { |
| 1853 | int i; |
| 1854 | Lisp_Object v = Fmake_vector (make_number (size / 4), make_number (0)); |
| 1855 | for (i = 0; i < size / 4; i++) |
| 1856 | { |
| 1857 | unsigned int j = ((unsigned int *) data) [i]; |
| 1858 | Faset (v, make_number (i), long_to_cons (j)); |
| 1859 | } |
| 1860 | return v; |
| 1861 | } |
| 1862 | } |
| 1863 | |
| 1864 | |
| 1865 | /* Use xfree, not XFree, to free the data obtained with this function. */ |
| 1866 | |
| 1867 | static void |
| 1868 | lisp_data_to_selection_data (display, obj, |
| 1869 | data_ret, type_ret, size_ret, |
| 1870 | format_ret, nofree_ret) |
| 1871 | Display *display; |
| 1872 | Lisp_Object obj; |
| 1873 | unsigned char **data_ret; |
| 1874 | Atom *type_ret; |
| 1875 | unsigned int *size_ret; |
| 1876 | int *format_ret; |
| 1877 | int *nofree_ret; |
| 1878 | { |
| 1879 | Lisp_Object type = Qnil; |
| 1880 | struct x_display_info *dpyinfo = x_display_info_for_display (display); |
| 1881 | |
| 1882 | *nofree_ret = 0; |
| 1883 | |
| 1884 | if (CONSP (obj) && SYMBOLP (XCAR (obj))) |
| 1885 | { |
| 1886 | type = XCAR (obj); |
| 1887 | obj = XCDR (obj); |
| 1888 | if (CONSP (obj) && NILP (XCDR (obj))) |
| 1889 | obj = XCAR (obj); |
| 1890 | } |
| 1891 | |
| 1892 | if (EQ (obj, QNULL) || (EQ (type, QNULL))) |
| 1893 | { /* This is not the same as declining */ |
| 1894 | *format_ret = 32; |
| 1895 | *size_ret = 0; |
| 1896 | *data_ret = 0; |
| 1897 | type = QNULL; |
| 1898 | } |
| 1899 | else if (STRINGP (obj)) |
| 1900 | { |
| 1901 | xassert (! STRING_MULTIBYTE (obj)); |
| 1902 | if (NILP (type)) |
| 1903 | type = QSTRING; |
| 1904 | *format_ret = 8; |
| 1905 | *size_ret = SBYTES (obj); |
| 1906 | *data_ret = SDATA (obj); |
| 1907 | *nofree_ret = 1; |
| 1908 | } |
| 1909 | else if (SYMBOLP (obj)) |
| 1910 | { |
| 1911 | *format_ret = 32; |
| 1912 | *size_ret = 1; |
| 1913 | *data_ret = (unsigned char *) xmalloc (sizeof (Atom) + 1); |
| 1914 | (*data_ret) [sizeof (Atom)] = 0; |
| 1915 | (*(Atom **) data_ret) [0] = symbol_to_x_atom (dpyinfo, display, obj); |
| 1916 | if (NILP (type)) type = QATOM; |
| 1917 | } |
| 1918 | else if (INTEGERP (obj) |
| 1919 | && XINT (obj) < 0xFFFF |
| 1920 | && XINT (obj) > -0xFFFF) |
| 1921 | { |
| 1922 | *format_ret = 16; |
| 1923 | *size_ret = 1; |
| 1924 | *data_ret = (unsigned char *) xmalloc (sizeof (short) + 1); |
| 1925 | (*data_ret) [sizeof (short)] = 0; |
| 1926 | (*(short **) data_ret) [0] = (short) XINT (obj); |
| 1927 | if (NILP (type)) type = QINTEGER; |
| 1928 | } |
| 1929 | else if (INTEGERP (obj) |
| 1930 | || (CONSP (obj) && INTEGERP (XCAR (obj)) |
| 1931 | && (INTEGERP (XCDR (obj)) |
| 1932 | || (CONSP (XCDR (obj)) |
| 1933 | && INTEGERP (XCAR (XCDR (obj))))))) |
| 1934 | { |
| 1935 | *format_ret = 32; |
| 1936 | *size_ret = 1; |
| 1937 | *data_ret = (unsigned char *) xmalloc (sizeof (long) + 1); |
| 1938 | (*data_ret) [sizeof (long)] = 0; |
| 1939 | (*(unsigned long **) data_ret) [0] = cons_to_long (obj); |
| 1940 | if (NILP (type)) type = QINTEGER; |
| 1941 | } |
| 1942 | else if (VECTORP (obj)) |
| 1943 | { |
| 1944 | /* Lisp_Vectors may represent a set of ATOMs; |
| 1945 | a set of 16 or 32 bit INTEGERs; |
| 1946 | or a set of ATOM_PAIRs (represented as [[A1 A2] [A3 A4] ...] |
| 1947 | */ |
| 1948 | int i; |
| 1949 | |
| 1950 | if (SYMBOLP (XVECTOR (obj)->contents [0])) |
| 1951 | /* This vector is an ATOM set */ |
| 1952 | { |
| 1953 | if (NILP (type)) type = QATOM; |
| 1954 | *size_ret = XVECTOR (obj)->size; |
| 1955 | *format_ret = 32; |
| 1956 | *data_ret = (unsigned char *) xmalloc ((*size_ret) * sizeof (Atom)); |
| 1957 | for (i = 0; i < *size_ret; i++) |
| 1958 | if (SYMBOLP (XVECTOR (obj)->contents [i])) |
| 1959 | (*(Atom **) data_ret) [i] |
| 1960 | = symbol_to_x_atom (dpyinfo, display, XVECTOR (obj)->contents [i]); |
| 1961 | else |
| 1962 | Fsignal (Qerror, /* Qselection_error */ |
| 1963 | Fcons (build_string |
| 1964 | ("all elements of selection vector must have same type"), |
| 1965 | Fcons (obj, Qnil))); |
| 1966 | } |
| 1967 | #if 0 /* #### MULTIPLE doesn't work yet */ |
| 1968 | else if (VECTORP (XVECTOR (obj)->contents [0])) |
| 1969 | /* This vector is an ATOM_PAIR set */ |
| 1970 | { |
| 1971 | if (NILP (type)) type = QATOM_PAIR; |
| 1972 | *size_ret = XVECTOR (obj)->size; |
| 1973 | *format_ret = 32; |
| 1974 | *data_ret = (unsigned char *) |
| 1975 | xmalloc ((*size_ret) * sizeof (Atom) * 2); |
| 1976 | for (i = 0; i < *size_ret; i++) |
| 1977 | if (VECTORP (XVECTOR (obj)->contents [i])) |
| 1978 | { |
| 1979 | Lisp_Object pair = XVECTOR (obj)->contents [i]; |
| 1980 | if (XVECTOR (pair)->size != 2) |
| 1981 | Fsignal (Qerror, |
| 1982 | Fcons (build_string |
| 1983 | ("elements of the vector must be vectors of exactly two elements"), |
| 1984 | Fcons (pair, Qnil))); |
| 1985 | |
| 1986 | (*(Atom **) data_ret) [i * 2] |
| 1987 | = symbol_to_x_atom (dpyinfo, display, |
| 1988 | XVECTOR (pair)->contents [0]); |
| 1989 | (*(Atom **) data_ret) [(i * 2) + 1] |
| 1990 | = symbol_to_x_atom (dpyinfo, display, |
| 1991 | XVECTOR (pair)->contents [1]); |
| 1992 | } |
| 1993 | else |
| 1994 | Fsignal (Qerror, |
| 1995 | Fcons (build_string |
| 1996 | ("all elements of the vector must be of the same type"), |
| 1997 | Fcons (obj, Qnil))); |
| 1998 | |
| 1999 | } |
| 2000 | #endif |
| 2001 | else |
| 2002 | /* This vector is an INTEGER set, or something like it */ |
| 2003 | { |
| 2004 | int data_size = 2; |
| 2005 | *size_ret = XVECTOR (obj)->size; |
| 2006 | if (NILP (type)) type = QINTEGER; |
| 2007 | *format_ret = 16; |
| 2008 | for (i = 0; i < *size_ret; i++) |
| 2009 | if (CONSP (XVECTOR (obj)->contents [i])) |
| 2010 | *format_ret = 32; |
| 2011 | else if (!INTEGERP (XVECTOR (obj)->contents [i])) |
| 2012 | Fsignal (Qerror, /* Qselection_error */ |
| 2013 | Fcons (build_string |
| 2014 | ("elements of selection vector must be integers or conses of integers"), |
| 2015 | Fcons (obj, Qnil))); |
| 2016 | |
| 2017 | /* Use sizeof(long) even if it is more than 32 bits. See comment |
| 2018 | in x_get_window_property and x_fill_property_data. */ |
| 2019 | |
| 2020 | if (*format_ret == 32) data_size = sizeof(long); |
| 2021 | *data_ret = (unsigned char *) xmalloc (*size_ret * data_size); |
| 2022 | for (i = 0; i < *size_ret; i++) |
| 2023 | if (*format_ret == 32) |
| 2024 | (*((unsigned long **) data_ret)) [i] |
| 2025 | = cons_to_long (XVECTOR (obj)->contents [i]); |
| 2026 | else |
| 2027 | (*((unsigned short **) data_ret)) [i] |
| 2028 | = (unsigned short) cons_to_long (XVECTOR (obj)->contents [i]); |
| 2029 | } |
| 2030 | } |
| 2031 | else |
| 2032 | Fsignal (Qerror, /* Qselection_error */ |
| 2033 | Fcons (build_string ("unrecognised selection data"), |
| 2034 | Fcons (obj, Qnil))); |
| 2035 | |
| 2036 | *type_ret = symbol_to_x_atom (dpyinfo, display, type); |
| 2037 | } |
| 2038 | |
| 2039 | static Lisp_Object |
| 2040 | clean_local_selection_data (obj) |
| 2041 | Lisp_Object obj; |
| 2042 | { |
| 2043 | if (CONSP (obj) |
| 2044 | && INTEGERP (XCAR (obj)) |
| 2045 | && CONSP (XCDR (obj)) |
| 2046 | && INTEGERP (XCAR (XCDR (obj))) |
| 2047 | && NILP (XCDR (XCDR (obj)))) |
| 2048 | obj = Fcons (XCAR (obj), XCDR (obj)); |
| 2049 | |
| 2050 | if (CONSP (obj) |
| 2051 | && INTEGERP (XCAR (obj)) |
| 2052 | && INTEGERP (XCDR (obj))) |
| 2053 | { |
| 2054 | if (XINT (XCAR (obj)) == 0) |
| 2055 | return XCDR (obj); |
| 2056 | if (XINT (XCAR (obj)) == -1) |
| 2057 | return make_number (- XINT (XCDR (obj))); |
| 2058 | } |
| 2059 | if (VECTORP (obj)) |
| 2060 | { |
| 2061 | int i; |
| 2062 | int size = XVECTOR (obj)->size; |
| 2063 | Lisp_Object copy; |
| 2064 | if (size == 1) |
| 2065 | return clean_local_selection_data (XVECTOR (obj)->contents [0]); |
| 2066 | copy = Fmake_vector (make_number (size), Qnil); |
| 2067 | for (i = 0; i < size; i++) |
| 2068 | XVECTOR (copy)->contents [i] |
| 2069 | = clean_local_selection_data (XVECTOR (obj)->contents [i]); |
| 2070 | return copy; |
| 2071 | } |
| 2072 | return obj; |
| 2073 | } |
| 2074 | \f |
| 2075 | /* Called from XTread_socket to handle SelectionNotify events. |
| 2076 | If it's the selection we are waiting for, stop waiting |
| 2077 | by setting the car of reading_selection_reply to non-nil. |
| 2078 | We store t there if the reply is successful, lambda if not. */ |
| 2079 | |
| 2080 | void |
| 2081 | x_handle_selection_notify (event) |
| 2082 | XSelectionEvent *event; |
| 2083 | { |
| 2084 | if (event->requestor != reading_selection_window) |
| 2085 | return; |
| 2086 | if (event->selection != reading_which_selection) |
| 2087 | return; |
| 2088 | |
| 2089 | TRACE0 ("Received SelectionNotify"); |
| 2090 | XSETCAR (reading_selection_reply, |
| 2091 | (event->property != 0 ? Qt : Qlambda)); |
| 2092 | } |
| 2093 | |
| 2094 | \f |
| 2095 | DEFUN ("x-own-selection-internal", Fx_own_selection_internal, |
| 2096 | Sx_own_selection_internal, 2, 2, 0, |
| 2097 | doc: /* Assert an X selection of the given TYPE with the given VALUE. |
| 2098 | TYPE is a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'. |
| 2099 | \(Those are literal upper-case symbol names, since that's what X expects.) |
| 2100 | VALUE is typically a string, or a cons of two markers, but may be |
| 2101 | anything that the functions on `selection-converter-alist' know about. */) |
| 2102 | (selection_name, selection_value) |
| 2103 | Lisp_Object selection_name, selection_value; |
| 2104 | { |
| 2105 | check_x (); |
| 2106 | CHECK_SYMBOL (selection_name); |
| 2107 | if (NILP (selection_value)) error ("selection-value may not be nil"); |
| 2108 | x_own_selection (selection_name, selection_value); |
| 2109 | return selection_value; |
| 2110 | } |
| 2111 | |
| 2112 | |
| 2113 | /* Request the selection value from the owner. If we are the owner, |
| 2114 | simply return our selection value. If we are not the owner, this |
| 2115 | will block until all of the data has arrived. */ |
| 2116 | |
| 2117 | DEFUN ("x-get-selection-internal", Fx_get_selection_internal, |
| 2118 | Sx_get_selection_internal, 2, 3, 0, |
| 2119 | doc: /* Return text selected from some X window. |
| 2120 | SELECTION is a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'. |
| 2121 | \(Those are literal upper-case symbol names, since that's what X expects.) |
| 2122 | TYPE is the type of data desired, typically `STRING'. |
| 2123 | TIME_STAMP is the time to use in the XConvertSelection call for foreign |
| 2124 | selections. If omitted, defaults to the time for the last event. */) |
| 2125 | (selection_symbol, target_type, time_stamp) |
| 2126 | Lisp_Object selection_symbol, target_type, time_stamp; |
| 2127 | { |
| 2128 | Lisp_Object val = Qnil; |
| 2129 | struct gcpro gcpro1, gcpro2; |
| 2130 | GCPRO2 (target_type, val); /* we store newly consed data into these */ |
| 2131 | check_x (); |
| 2132 | CHECK_SYMBOL (selection_symbol); |
| 2133 | |
| 2134 | #if 0 /* #### MULTIPLE doesn't work yet */ |
| 2135 | if (CONSP (target_type) |
| 2136 | && XCAR (target_type) == QMULTIPLE) |
| 2137 | { |
| 2138 | CHECK_VECTOR (XCDR (target_type)); |
| 2139 | /* So we don't destructively modify this... */ |
| 2140 | target_type = copy_multiple_data (target_type); |
| 2141 | } |
| 2142 | else |
| 2143 | #endif |
| 2144 | CHECK_SYMBOL (target_type); |
| 2145 | |
| 2146 | val = x_get_local_selection (selection_symbol, target_type, 1); |
| 2147 | |
| 2148 | if (NILP (val)) |
| 2149 | { |
| 2150 | val = x_get_foreign_selection (selection_symbol, target_type, time_stamp); |
| 2151 | goto DONE; |
| 2152 | } |
| 2153 | |
| 2154 | if (CONSP (val) |
| 2155 | && SYMBOLP (XCAR (val))) |
| 2156 | { |
| 2157 | val = XCDR (val); |
| 2158 | if (CONSP (val) && NILP (XCDR (val))) |
| 2159 | val = XCAR (val); |
| 2160 | } |
| 2161 | val = clean_local_selection_data (val); |
| 2162 | DONE: |
| 2163 | UNGCPRO; |
| 2164 | return val; |
| 2165 | } |
| 2166 | |
| 2167 | DEFUN ("x-disown-selection-internal", Fx_disown_selection_internal, |
| 2168 | Sx_disown_selection_internal, 1, 2, 0, |
| 2169 | doc: /* If we own the selection SELECTION, disown it. |
| 2170 | Disowning it means there is no such selection. */) |
| 2171 | (selection, time) |
| 2172 | Lisp_Object selection; |
| 2173 | Lisp_Object time; |
| 2174 | { |
| 2175 | Time timestamp; |
| 2176 | Atom selection_atom; |
| 2177 | struct selection_input_event event; |
| 2178 | Display *display; |
| 2179 | struct x_display_info *dpyinfo; |
| 2180 | struct frame *sf = SELECTED_FRAME (); |
| 2181 | |
| 2182 | check_x (); |
| 2183 | display = FRAME_X_DISPLAY (sf); |
| 2184 | dpyinfo = FRAME_X_DISPLAY_INFO (sf); |
| 2185 | CHECK_SYMBOL (selection); |
| 2186 | if (NILP (time)) |
| 2187 | timestamp = last_event_timestamp; |
| 2188 | else |
| 2189 | timestamp = cons_to_long (time); |
| 2190 | |
| 2191 | if (NILP (assq_no_quit (selection, Vselection_alist))) |
| 2192 | return Qnil; /* Don't disown the selection when we're not the owner. */ |
| 2193 | |
| 2194 | selection_atom = symbol_to_x_atom (dpyinfo, display, selection); |
| 2195 | |
| 2196 | BLOCK_INPUT; |
| 2197 | XSetSelectionOwner (display, selection_atom, None, timestamp); |
| 2198 | UNBLOCK_INPUT; |
| 2199 | |
| 2200 | /* It doesn't seem to be guaranteed that a SelectionClear event will be |
| 2201 | generated for a window which owns the selection when that window sets |
| 2202 | the selection owner to None. The NCD server does, the MIT Sun4 server |
| 2203 | doesn't. So we synthesize one; this means we might get two, but |
| 2204 | that's ok, because the second one won't have any effect. */ |
| 2205 | SELECTION_EVENT_DISPLAY (&event) = display; |
| 2206 | SELECTION_EVENT_SELECTION (&event) = selection_atom; |
| 2207 | SELECTION_EVENT_TIME (&event) = timestamp; |
| 2208 | x_handle_selection_clear ((struct input_event *) &event); |
| 2209 | |
| 2210 | return Qt; |
| 2211 | } |
| 2212 | |
| 2213 | /* Get rid of all the selections in buffer BUFFER. |
| 2214 | This is used when we kill a buffer. */ |
| 2215 | |
| 2216 | void |
| 2217 | x_disown_buffer_selections (buffer) |
| 2218 | Lisp_Object buffer; |
| 2219 | { |
| 2220 | Lisp_Object tail; |
| 2221 | struct buffer *buf = XBUFFER (buffer); |
| 2222 | |
| 2223 | for (tail = Vselection_alist; CONSP (tail); tail = XCDR (tail)) |
| 2224 | { |
| 2225 | Lisp_Object elt, value; |
| 2226 | elt = XCAR (tail); |
| 2227 | value = XCDR (elt); |
| 2228 | if (CONSP (value) && MARKERP (XCAR (value)) |
| 2229 | && XMARKER (XCAR (value))->buffer == buf) |
| 2230 | Fx_disown_selection_internal (XCAR (elt), Qnil); |
| 2231 | } |
| 2232 | } |
| 2233 | |
| 2234 | DEFUN ("x-selection-owner-p", Fx_selection_owner_p, Sx_selection_owner_p, |
| 2235 | 0, 1, 0, |
| 2236 | doc: /* Whether the current Emacs process owns the given X Selection. |
| 2237 | The arg should be the name of the selection in question, typically one of |
| 2238 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'. |
| 2239 | \(Those are literal upper-case symbol names, since that's what X expects.) |
| 2240 | For convenience, the symbol nil is the same as `PRIMARY', |
| 2241 | and t is the same as `SECONDARY'. */) |
| 2242 | (selection) |
| 2243 | Lisp_Object selection; |
| 2244 | { |
| 2245 | check_x (); |
| 2246 | CHECK_SYMBOL (selection); |
| 2247 | if (EQ (selection, Qnil)) selection = QPRIMARY; |
| 2248 | if (EQ (selection, Qt)) selection = QSECONDARY; |
| 2249 | |
| 2250 | if (NILP (Fassq (selection, Vselection_alist))) |
| 2251 | return Qnil; |
| 2252 | return Qt; |
| 2253 | } |
| 2254 | |
| 2255 | DEFUN ("x-selection-exists-p", Fx_selection_exists_p, Sx_selection_exists_p, |
| 2256 | 0, 1, 0, |
| 2257 | doc: /* Whether there is an owner for the given X Selection. |
| 2258 | The arg should be the name of the selection in question, typically one of |
| 2259 | the symbols `PRIMARY', `SECONDARY', or `CLIPBOARD'. |
| 2260 | \(Those are literal upper-case symbol names, since that's what X expects.) |
| 2261 | For convenience, the symbol nil is the same as `PRIMARY', |
| 2262 | and t is the same as `SECONDARY'. */) |
| 2263 | (selection) |
| 2264 | Lisp_Object selection; |
| 2265 | { |
| 2266 | Window owner; |
| 2267 | Atom atom; |
| 2268 | Display *dpy; |
| 2269 | struct frame *sf = SELECTED_FRAME (); |
| 2270 | |
| 2271 | /* It should be safe to call this before we have an X frame. */ |
| 2272 | if (! FRAME_X_P (sf)) |
| 2273 | return Qnil; |
| 2274 | |
| 2275 | dpy = FRAME_X_DISPLAY (sf); |
| 2276 | CHECK_SYMBOL (selection); |
| 2277 | if (!NILP (Fx_selection_owner_p (selection))) |
| 2278 | return Qt; |
| 2279 | if (EQ (selection, Qnil)) selection = QPRIMARY; |
| 2280 | if (EQ (selection, Qt)) selection = QSECONDARY; |
| 2281 | atom = symbol_to_x_atom (FRAME_X_DISPLAY_INFO (sf), dpy, selection); |
| 2282 | if (atom == 0) |
| 2283 | return Qnil; |
| 2284 | BLOCK_INPUT; |
| 2285 | owner = XGetSelectionOwner (dpy, atom); |
| 2286 | UNBLOCK_INPUT; |
| 2287 | return (owner ? Qt : Qnil); |
| 2288 | } |
| 2289 | |
| 2290 | \f |
| 2291 | #ifdef CUT_BUFFER_SUPPORT |
| 2292 | |
| 2293 | /* Ensure that all 8 cut buffers exist. ICCCM says we gotta... */ |
| 2294 | static void |
| 2295 | initialize_cut_buffers (display, window) |
| 2296 | Display *display; |
| 2297 | Window window; |
| 2298 | { |
| 2299 | unsigned char *data = (unsigned char *) ""; |
| 2300 | BLOCK_INPUT; |
| 2301 | #define FROB(atom) XChangeProperty (display, window, atom, XA_STRING, 8, \ |
| 2302 | PropModeAppend, data, 0) |
| 2303 | FROB (XA_CUT_BUFFER0); |
| 2304 | FROB (XA_CUT_BUFFER1); |
| 2305 | FROB (XA_CUT_BUFFER2); |
| 2306 | FROB (XA_CUT_BUFFER3); |
| 2307 | FROB (XA_CUT_BUFFER4); |
| 2308 | FROB (XA_CUT_BUFFER5); |
| 2309 | FROB (XA_CUT_BUFFER6); |
| 2310 | FROB (XA_CUT_BUFFER7); |
| 2311 | #undef FROB |
| 2312 | UNBLOCK_INPUT; |
| 2313 | } |
| 2314 | |
| 2315 | |
| 2316 | #define CHECK_CUT_BUFFER(symbol) \ |
| 2317 | { CHECK_SYMBOL ((symbol)); \ |
| 2318 | if (!EQ((symbol), QCUT_BUFFER0) && !EQ((symbol), QCUT_BUFFER1) \ |
| 2319 | && !EQ((symbol), QCUT_BUFFER2) && !EQ((symbol), QCUT_BUFFER3) \ |
| 2320 | && !EQ((symbol), QCUT_BUFFER4) && !EQ((symbol), QCUT_BUFFER5) \ |
| 2321 | && !EQ((symbol), QCUT_BUFFER6) && !EQ((symbol), QCUT_BUFFER7)) \ |
| 2322 | Fsignal (Qerror, \ |
| 2323 | Fcons (build_string ("doesn't name a cut buffer"), \ |
| 2324 | Fcons ((symbol), Qnil))); \ |
| 2325 | } |
| 2326 | |
| 2327 | DEFUN ("x-get-cut-buffer-internal", Fx_get_cut_buffer_internal, |
| 2328 | Sx_get_cut_buffer_internal, 1, 1, 0, |
| 2329 | doc: /* Returns the value of the named cut buffer (typically CUT_BUFFER0). */) |
| 2330 | (buffer) |
| 2331 | Lisp_Object buffer; |
| 2332 | { |
| 2333 | Window window; |
| 2334 | Atom buffer_atom; |
| 2335 | unsigned char *data; |
| 2336 | int bytes; |
| 2337 | Atom type; |
| 2338 | int format; |
| 2339 | unsigned long size; |
| 2340 | Lisp_Object ret; |
| 2341 | Display *display; |
| 2342 | struct x_display_info *dpyinfo; |
| 2343 | struct frame *sf = SELECTED_FRAME (); |
| 2344 | |
| 2345 | check_x (); |
| 2346 | display = FRAME_X_DISPLAY (sf); |
| 2347 | dpyinfo = FRAME_X_DISPLAY_INFO (sf); |
| 2348 | window = RootWindow (display, 0); /* Cut buffers are on screen 0 */ |
| 2349 | CHECK_CUT_BUFFER (buffer); |
| 2350 | buffer_atom = symbol_to_x_atom (dpyinfo, display, buffer); |
| 2351 | |
| 2352 | x_get_window_property (display, window, buffer_atom, &data, &bytes, |
| 2353 | &type, &format, &size, 0); |
| 2354 | if (!data || !format) |
| 2355 | return Qnil; |
| 2356 | |
| 2357 | if (format != 8 || type != XA_STRING) |
| 2358 | Fsignal (Qerror, |
| 2359 | Fcons (build_string ("cut buffer doesn't contain 8-bit data"), |
| 2360 | Fcons (x_atom_to_symbol (display, type), |
| 2361 | Fcons (make_number (format), Qnil)))); |
| 2362 | |
| 2363 | ret = (bytes ? make_unibyte_string ((char *) data, bytes) : Qnil); |
| 2364 | /* Use xfree, not XFree, because x_get_window_property |
| 2365 | calls xmalloc itself. */ |
| 2366 | xfree (data); |
| 2367 | return ret; |
| 2368 | } |
| 2369 | |
| 2370 | |
| 2371 | DEFUN ("x-store-cut-buffer-internal", Fx_store_cut_buffer_internal, |
| 2372 | Sx_store_cut_buffer_internal, 2, 2, 0, |
| 2373 | doc: /* Sets the value of the named cut buffer (typically CUT_BUFFER0). */) |
| 2374 | (buffer, string) |
| 2375 | Lisp_Object buffer, string; |
| 2376 | { |
| 2377 | Window window; |
| 2378 | Atom buffer_atom; |
| 2379 | unsigned char *data; |
| 2380 | int bytes; |
| 2381 | int bytes_remaining; |
| 2382 | int max_bytes; |
| 2383 | Display *display; |
| 2384 | struct frame *sf = SELECTED_FRAME (); |
| 2385 | |
| 2386 | check_x (); |
| 2387 | display = FRAME_X_DISPLAY (sf); |
| 2388 | window = RootWindow (display, 0); /* Cut buffers are on screen 0 */ |
| 2389 | |
| 2390 | max_bytes = SELECTION_QUANTUM (display); |
| 2391 | if (max_bytes > MAX_SELECTION_QUANTUM) |
| 2392 | max_bytes = MAX_SELECTION_QUANTUM; |
| 2393 | |
| 2394 | CHECK_CUT_BUFFER (buffer); |
| 2395 | CHECK_STRING (string); |
| 2396 | buffer_atom = symbol_to_x_atom (FRAME_X_DISPLAY_INFO (sf), |
| 2397 | display, buffer); |
| 2398 | data = (unsigned char *) SDATA (string); |
| 2399 | bytes = SBYTES (string); |
| 2400 | bytes_remaining = bytes; |
| 2401 | |
| 2402 | if (! FRAME_X_DISPLAY_INFO (sf)->cut_buffers_initialized) |
| 2403 | { |
| 2404 | initialize_cut_buffers (display, window); |
| 2405 | FRAME_X_DISPLAY_INFO (sf)->cut_buffers_initialized = 1; |
| 2406 | } |
| 2407 | |
| 2408 | BLOCK_INPUT; |
| 2409 | |
| 2410 | /* Don't mess up with an empty value. */ |
| 2411 | if (!bytes_remaining) |
| 2412 | XChangeProperty (display, window, buffer_atom, XA_STRING, 8, |
| 2413 | PropModeReplace, data, 0); |
| 2414 | |
| 2415 | while (bytes_remaining) |
| 2416 | { |
| 2417 | int chunk = (bytes_remaining < max_bytes |
| 2418 | ? bytes_remaining : max_bytes); |
| 2419 | XChangeProperty (display, window, buffer_atom, XA_STRING, 8, |
| 2420 | (bytes_remaining == bytes |
| 2421 | ? PropModeReplace |
| 2422 | : PropModeAppend), |
| 2423 | data, chunk); |
| 2424 | data += chunk; |
| 2425 | bytes_remaining -= chunk; |
| 2426 | } |
| 2427 | UNBLOCK_INPUT; |
| 2428 | return string; |
| 2429 | } |
| 2430 | |
| 2431 | |
| 2432 | DEFUN ("x-rotate-cut-buffers-internal", Fx_rotate_cut_buffers_internal, |
| 2433 | Sx_rotate_cut_buffers_internal, 1, 1, 0, |
| 2434 | doc: /* Rotate the values of the cut buffers by the given number of step. |
| 2435 | Positive means shift the values forward, negative means backward. */) |
| 2436 | (n) |
| 2437 | Lisp_Object n; |
| 2438 | { |
| 2439 | Window window; |
| 2440 | Atom props[8]; |
| 2441 | Display *display; |
| 2442 | struct frame *sf = SELECTED_FRAME (); |
| 2443 | |
| 2444 | check_x (); |
| 2445 | display = FRAME_X_DISPLAY (sf); |
| 2446 | window = RootWindow (display, 0); /* Cut buffers are on screen 0 */ |
| 2447 | CHECK_NUMBER (n); |
| 2448 | if (XINT (n) == 0) |
| 2449 | return n; |
| 2450 | if (! FRAME_X_DISPLAY_INFO (sf)->cut_buffers_initialized) |
| 2451 | { |
| 2452 | initialize_cut_buffers (display, window); |
| 2453 | FRAME_X_DISPLAY_INFO (sf)->cut_buffers_initialized = 1; |
| 2454 | } |
| 2455 | |
| 2456 | props[0] = XA_CUT_BUFFER0; |
| 2457 | props[1] = XA_CUT_BUFFER1; |
| 2458 | props[2] = XA_CUT_BUFFER2; |
| 2459 | props[3] = XA_CUT_BUFFER3; |
| 2460 | props[4] = XA_CUT_BUFFER4; |
| 2461 | props[5] = XA_CUT_BUFFER5; |
| 2462 | props[6] = XA_CUT_BUFFER6; |
| 2463 | props[7] = XA_CUT_BUFFER7; |
| 2464 | BLOCK_INPUT; |
| 2465 | XRotateWindowProperties (display, window, props, 8, XINT (n)); |
| 2466 | UNBLOCK_INPUT; |
| 2467 | return n; |
| 2468 | } |
| 2469 | |
| 2470 | #endif |
| 2471 | \f |
| 2472 | /*********************************************************************** |
| 2473 | Drag and drop support |
| 2474 | ***********************************************************************/ |
| 2475 | /* Check that lisp values are of correct type for x_fill_property_data. |
| 2476 | That is, number, string or a cons with two numbers (low and high 16 |
| 2477 | bit parts of a 32 bit number). */ |
| 2478 | |
| 2479 | int |
| 2480 | x_check_property_data (data) |
| 2481 | Lisp_Object data; |
| 2482 | { |
| 2483 | Lisp_Object iter; |
| 2484 | int size = 0; |
| 2485 | |
| 2486 | for (iter = data; CONSP (iter) && size != -1; iter = XCDR (iter), ++size) |
| 2487 | { |
| 2488 | Lisp_Object o = XCAR (iter); |
| 2489 | |
| 2490 | if (! NUMBERP (o) && ! STRINGP (o) && ! CONSP (o)) |
| 2491 | size = -1; |
| 2492 | else if (CONSP (o) && |
| 2493 | (! NUMBERP (XCAR (o)) || ! NUMBERP (XCDR (o)))) |
| 2494 | size = -1; |
| 2495 | } |
| 2496 | |
| 2497 | return size; |
| 2498 | } |
| 2499 | |
| 2500 | /* Convert lisp values to a C array. Values may be a number, a string |
| 2501 | which is taken as an X atom name and converted to the atom value, or |
| 2502 | a cons containing the two 16 bit parts of a 32 bit number. |
| 2503 | |
| 2504 | DPY is the display use to look up X atoms. |
| 2505 | DATA is a Lisp list of values to be converted. |
| 2506 | RET is the C array that contains the converted values. It is assumed |
| 2507 | it is big enough to hold all values. |
| 2508 | FORMAT is 8, 16 or 32 and denotes char/short/long for each C value to |
| 2509 | be stored in RET. Note that long is used for 32 even if long is more |
| 2510 | than 32 bits (see man pages for XChangeProperty, XGetWindowProperty and |
| 2511 | XClientMessageEvent). */ |
| 2512 | |
| 2513 | void |
| 2514 | x_fill_property_data (dpy, data, ret, format) |
| 2515 | Display *dpy; |
| 2516 | Lisp_Object data; |
| 2517 | void *ret; |
| 2518 | int format; |
| 2519 | { |
| 2520 | long val; |
| 2521 | long *d32 = (long *) ret; |
| 2522 | short *d16 = (short *) ret; |
| 2523 | char *d08 = (char *) ret; |
| 2524 | Lisp_Object iter; |
| 2525 | |
| 2526 | for (iter = data; CONSP (iter); iter = XCDR (iter)) |
| 2527 | { |
| 2528 | Lisp_Object o = XCAR (iter); |
| 2529 | |
| 2530 | if (INTEGERP (o)) |
| 2531 | val = (long) XFASTINT (o); |
| 2532 | else if (FLOATP (o)) |
| 2533 | val = (long) XFLOAT_DATA (o); |
| 2534 | else if (CONSP (o)) |
| 2535 | val = (long) cons_to_long (o); |
| 2536 | else if (STRINGP (o)) |
| 2537 | { |
| 2538 | BLOCK_INPUT; |
| 2539 | val = (long) XInternAtom (dpy, (char *) SDATA (o), False); |
| 2540 | UNBLOCK_INPUT; |
| 2541 | } |
| 2542 | else |
| 2543 | error ("Wrong type, must be string, number or cons"); |
| 2544 | |
| 2545 | if (format == 8) |
| 2546 | *d08++ = (char) val; |
| 2547 | else if (format == 16) |
| 2548 | *d16++ = (short) val; |
| 2549 | else |
| 2550 | *d32++ = val; |
| 2551 | } |
| 2552 | } |
| 2553 | |
| 2554 | /* Convert an array of C values to a Lisp list. |
| 2555 | F is the frame to be used to look up X atoms if the TYPE is XA_ATOM. |
| 2556 | DATA is a C array of values to be converted. |
| 2557 | TYPE is the type of the data. Only XA_ATOM is special, it converts |
| 2558 | each number in DATA to its corresponfing X atom as a symbol. |
| 2559 | FORMAT is 8, 16 or 32 and gives the size in bits for each C value to |
| 2560 | be stored in RET. |
| 2561 | SIZE is the number of elements in DATA. |
| 2562 | |
| 2563 | Also see comment for selection_data_to_lisp_data above. */ |
| 2564 | |
| 2565 | Lisp_Object |
| 2566 | x_property_data_to_lisp (f, data, type, format, size) |
| 2567 | struct frame *f; |
| 2568 | unsigned char *data; |
| 2569 | Atom type; |
| 2570 | int format; |
| 2571 | unsigned long size; |
| 2572 | { |
| 2573 | return selection_data_to_lisp_data (FRAME_X_DISPLAY (f), |
| 2574 | data, size*format/8, type, format); |
| 2575 | } |
| 2576 | |
| 2577 | /* Get the mouse position in frame relative coordinates. */ |
| 2578 | |
| 2579 | static void |
| 2580 | mouse_position_for_drop (f, x, y) |
| 2581 | FRAME_PTR f; |
| 2582 | int *x; |
| 2583 | int *y; |
| 2584 | { |
| 2585 | Window root, dummy_window; |
| 2586 | int dummy; |
| 2587 | |
| 2588 | BLOCK_INPUT; |
| 2589 | |
| 2590 | XQueryPointer (FRAME_X_DISPLAY (f), |
| 2591 | DefaultRootWindow (FRAME_X_DISPLAY (f)), |
| 2592 | |
| 2593 | /* The root window which contains the pointer. */ |
| 2594 | &root, |
| 2595 | |
| 2596 | /* Window pointer is on, not used */ |
| 2597 | &dummy_window, |
| 2598 | |
| 2599 | /* The position on that root window. */ |
| 2600 | x, y, |
| 2601 | |
| 2602 | /* x/y in dummy_window coordinates, not used. */ |
| 2603 | &dummy, &dummy, |
| 2604 | |
| 2605 | /* Modifier keys and pointer buttons, about which |
| 2606 | we don't care. */ |
| 2607 | (unsigned int *) &dummy); |
| 2608 | |
| 2609 | |
| 2610 | /* Absolute to relative. */ |
| 2611 | *x -= f->left_pos + FRAME_OUTER_TO_INNER_DIFF_X (f); |
| 2612 | *y -= f->top_pos + FRAME_OUTER_TO_INNER_DIFF_Y (f); |
| 2613 | |
| 2614 | UNBLOCK_INPUT; |
| 2615 | } |
| 2616 | |
| 2617 | DEFUN ("x-get-atom-name", Fx_get_atom_name, |
| 2618 | Sx_get_atom_name, 1, 2, 0, |
| 2619 | doc: /* Return the X atom name for VALUE as a string. |
| 2620 | VALUE may be a number or a cons where the car is the upper 16 bits and |
| 2621 | the cdr is the lower 16 bits of a 32 bit value. |
| 2622 | Use the display for FRAME or the current frame if FRAME is not given or nil. |
| 2623 | |
| 2624 | If the value is 0 or the atom is not known, return the empty string. */) |
| 2625 | (value, frame) |
| 2626 | Lisp_Object value, frame; |
| 2627 | { |
| 2628 | struct frame *f = check_x_frame (frame); |
| 2629 | char *name = 0; |
| 2630 | Lisp_Object ret = Qnil; |
| 2631 | int count; |
| 2632 | Display *dpy = FRAME_X_DISPLAY (f); |
| 2633 | Atom atom; |
| 2634 | |
| 2635 | if (INTEGERP (value)) |
| 2636 | atom = (Atom) XUINT (value); |
| 2637 | else if (FLOATP (value)) |
| 2638 | atom = (Atom) XFLOAT_DATA (value); |
| 2639 | else if (CONSP (value)) |
| 2640 | atom = (Atom) cons_to_long (value); |
| 2641 | else |
| 2642 | error ("Wrong type, value must be number or cons"); |
| 2643 | |
| 2644 | BLOCK_INPUT; |
| 2645 | count = x_catch_errors (dpy); |
| 2646 | |
| 2647 | name = atom ? XGetAtomName (dpy, atom) : ""; |
| 2648 | |
| 2649 | if (! x_had_errors_p (dpy)) |
| 2650 | ret = make_string (name, strlen (name)); |
| 2651 | |
| 2652 | x_uncatch_errors (dpy, count); |
| 2653 | |
| 2654 | if (atom && name) XFree (name); |
| 2655 | if (NILP (ret)) ret = make_string ("", 0); |
| 2656 | |
| 2657 | UNBLOCK_INPUT; |
| 2658 | |
| 2659 | return ret; |
| 2660 | } |
| 2661 | |
| 2662 | /* Convert an XClientMessageEvent to a Lisp event of type DRAG_N_DROP_EVENT. |
| 2663 | TODO: Check if this client event really is a DND event? */ |
| 2664 | |
| 2665 | int |
| 2666 | x_handle_dnd_message (f, event, dpyinfo, bufp) |
| 2667 | struct frame *f; |
| 2668 | XClientMessageEvent *event; |
| 2669 | struct x_display_info *dpyinfo; |
| 2670 | struct input_event *bufp; |
| 2671 | { |
| 2672 | Lisp_Object vec; |
| 2673 | Lisp_Object frame; |
| 2674 | /* format 32 => size 5, format 16 => size 10, format 8 => size 20 */ |
| 2675 | unsigned long size = 160/event->format; |
| 2676 | int x, y; |
| 2677 | unsigned char *data = (unsigned char *) event->data.b; |
| 2678 | int idata[5]; |
| 2679 | |
| 2680 | XSETFRAME (frame, f); |
| 2681 | |
| 2682 | /* On a 64 bit machine, the event->data.l array members are 64 bits (long), |
| 2683 | but the x_property_data_to_lisp (or rather selection_data_to_lisp_data) |
| 2684 | function expects them to be of size int (i.e. 32). So to be able to |
| 2685 | use that function, put the data in the form it expects if format is 32. */ |
| 2686 | |
| 2687 | if (event->format == 32 && event->format < BITS_PER_LONG) |
| 2688 | { |
| 2689 | int i; |
| 2690 | for (i = 0; i < 5; ++i) /* There are only 5 longs in a ClientMessage. */ |
| 2691 | idata[i] = (int) event->data.l[i]; |
| 2692 | data = (unsigned char *) idata; |
| 2693 | } |
| 2694 | |
| 2695 | vec = Fmake_vector (make_number (4), Qnil); |
| 2696 | AREF (vec, 0) = SYMBOL_NAME (x_atom_to_symbol (FRAME_X_DISPLAY (f), |
| 2697 | event->message_type)); |
| 2698 | AREF (vec, 1) = frame; |
| 2699 | AREF (vec, 2) = make_number (event->format); |
| 2700 | AREF (vec, 3) = x_property_data_to_lisp (f, |
| 2701 | data, |
| 2702 | event->message_type, |
| 2703 | event->format, |
| 2704 | size); |
| 2705 | |
| 2706 | mouse_position_for_drop (f, &x, &y); |
| 2707 | bufp->kind = DRAG_N_DROP_EVENT; |
| 2708 | bufp->frame_or_window = Fcons (frame, vec); |
| 2709 | bufp->timestamp = CurrentTime; |
| 2710 | bufp->x = make_number (x); |
| 2711 | bufp->y = make_number (y); |
| 2712 | bufp->arg = Qnil; |
| 2713 | bufp->modifiers = 0; |
| 2714 | |
| 2715 | return 1; |
| 2716 | } |
| 2717 | |
| 2718 | DEFUN ("x-send-client-message", Fx_send_client_event, |
| 2719 | Sx_send_client_message, 6, 6, 0, |
| 2720 | doc: /* Send a client message of MESSAGE-TYPE to window DEST on DISPLAY. |
| 2721 | |
| 2722 | For DISPLAY, specify either a frame or a display name (a string). |
| 2723 | If DISPLAY is nil, that stands for the selected frame's display. |
| 2724 | DEST may be a number, in which case it is a Window id. The value 0 may |
| 2725 | be used to send to the root window of the DISPLAY. |
| 2726 | If DEST is a cons, it is converted to a 32 bit number |
| 2727 | with the high 16 bits from the car and the lower 16 bit from the cdr. That |
| 2728 | number is then used as a window id. |
| 2729 | If DEST is a frame the event is sent to the outer window of that frame. |
| 2730 | Nil means the currently selected frame. |
| 2731 | If DEST is the string "PointerWindow" the event is sent to the window that |
| 2732 | contains the pointer. If DEST is the string "InputFocus" the event is |
| 2733 | sent to the window that has the input focus. |
| 2734 | FROM is the frame sending the event. Use nil for currently selected frame. |
| 2735 | MESSAGE-TYPE is the name of an Atom as a string. |
| 2736 | FORMAT must be one of 8, 16 or 32 and determines the size of the values in |
| 2737 | bits. VALUES is a list of numbers, cons and/or strings containing the values |
| 2738 | to send. If a value is a string, it is converted to an Atom and the value of |
| 2739 | the Atom is sent. If a value is a cons, it is converted to a 32 bit number |
| 2740 | with the high 16 bits from the car and the lower 16 bit from the cdr. |
| 2741 | If more values than fits into the event is given, the excessive values |
| 2742 | are ignored. */) |
| 2743 | (display, dest, from, message_type, format, values) |
| 2744 | Lisp_Object display, dest, from, message_type, format, values; |
| 2745 | { |
| 2746 | struct x_display_info *dpyinfo = check_x_display_info (display); |
| 2747 | Window wdest; |
| 2748 | XEvent event; |
| 2749 | Lisp_Object cons; |
| 2750 | int size; |
| 2751 | struct frame *f = check_x_frame (from); |
| 2752 | int count; |
| 2753 | int to_root; |
| 2754 | |
| 2755 | CHECK_STRING (message_type); |
| 2756 | CHECK_NUMBER (format); |
| 2757 | CHECK_CONS (values); |
| 2758 | |
| 2759 | if (x_check_property_data (values) == -1) |
| 2760 | error ("Bad data in VALUES, must be number, cons or string"); |
| 2761 | |
| 2762 | event.xclient.type = ClientMessage; |
| 2763 | event.xclient.format = XFASTINT (format); |
| 2764 | |
| 2765 | if (event.xclient.format != 8 && event.xclient.format != 16 |
| 2766 | && event.xclient.format != 32) |
| 2767 | error ("FORMAT must be one of 8, 16 or 32"); |
| 2768 | |
| 2769 | if (FRAMEP (dest) || NILP (dest)) |
| 2770 | { |
| 2771 | struct frame *fdest = check_x_frame (dest); |
| 2772 | wdest = FRAME_OUTER_WINDOW (fdest); |
| 2773 | } |
| 2774 | else if (STRINGP (dest)) |
| 2775 | { |
| 2776 | if (strcmp (SDATA (dest), "PointerWindow") == 0) |
| 2777 | wdest = PointerWindow; |
| 2778 | else if (strcmp (SDATA (dest), "InputFocus") == 0) |
| 2779 | wdest = InputFocus; |
| 2780 | else |
| 2781 | error ("DEST as a string must be one of PointerWindow or InputFocus"); |
| 2782 | } |
| 2783 | else if (INTEGERP (dest)) |
| 2784 | wdest = (Window) XFASTINT (dest); |
| 2785 | else if (FLOATP (dest)) |
| 2786 | wdest = (Window) XFLOAT_DATA (dest); |
| 2787 | else if (CONSP (dest)) |
| 2788 | { |
| 2789 | if (! NUMBERP (XCAR (dest)) || ! NUMBERP (XCDR (dest))) |
| 2790 | error ("Both car and cdr for DEST must be numbers"); |
| 2791 | else |
| 2792 | wdest = (Window) cons_to_long (dest); |
| 2793 | } |
| 2794 | else |
| 2795 | error ("DEST must be a frame, nil, string, number or cons"); |
| 2796 | |
| 2797 | if (wdest == 0) wdest = dpyinfo->root_window; |
| 2798 | to_root = wdest == dpyinfo->root_window; |
| 2799 | |
| 2800 | for (cons = values, size = 0; CONSP (cons); cons = XCDR (cons), ++size) |
| 2801 | ; |
| 2802 | |
| 2803 | BLOCK_INPUT; |
| 2804 | |
| 2805 | event.xclient.message_type |
| 2806 | = XInternAtom (dpyinfo->display, SDATA (message_type), False); |
| 2807 | event.xclient.display = dpyinfo->display; |
| 2808 | |
| 2809 | /* Some clients (metacity for example) expects sending window to be here |
| 2810 | when sending to the root window. */ |
| 2811 | event.xclient.window = to_root ? FRAME_OUTER_WINDOW (f) : wdest; |
| 2812 | |
| 2813 | |
| 2814 | memset (event.xclient.data.b, 0, sizeof (event.xclient.data.b)); |
| 2815 | x_fill_property_data (dpyinfo->display, values, event.xclient.data.b, |
| 2816 | event.xclient.format); |
| 2817 | |
| 2818 | /* If event mask is 0 the event is sent to the client that created |
| 2819 | the destination window. But if we are sending to the root window, |
| 2820 | there is no such client. Then we set the event mask to 0xffff. The |
| 2821 | event then goes to clients selecting for events on the root window. */ |
| 2822 | count = x_catch_errors (dpyinfo->display); |
| 2823 | { |
| 2824 | int propagate = to_root ? False : True; |
| 2825 | unsigned mask = to_root ? 0xffff : 0; |
| 2826 | XSendEvent (dpyinfo->display, wdest, propagate, mask, &event); |
| 2827 | XFlush (dpyinfo->display); |
| 2828 | } |
| 2829 | x_uncatch_errors (dpyinfo->display, count); |
| 2830 | UNBLOCK_INPUT; |
| 2831 | |
| 2832 | return Qnil; |
| 2833 | } |
| 2834 | |
| 2835 | \f |
| 2836 | void |
| 2837 | syms_of_xselect () |
| 2838 | { |
| 2839 | defsubr (&Sx_get_selection_internal); |
| 2840 | defsubr (&Sx_own_selection_internal); |
| 2841 | defsubr (&Sx_disown_selection_internal); |
| 2842 | defsubr (&Sx_selection_owner_p); |
| 2843 | defsubr (&Sx_selection_exists_p); |
| 2844 | |
| 2845 | #ifdef CUT_BUFFER_SUPPORT |
| 2846 | defsubr (&Sx_get_cut_buffer_internal); |
| 2847 | defsubr (&Sx_store_cut_buffer_internal); |
| 2848 | defsubr (&Sx_rotate_cut_buffers_internal); |
| 2849 | #endif |
| 2850 | |
| 2851 | defsubr (&Sx_get_atom_name); |
| 2852 | defsubr (&Sx_send_client_message); |
| 2853 | |
| 2854 | reading_selection_reply = Fcons (Qnil, Qnil); |
| 2855 | staticpro (&reading_selection_reply); |
| 2856 | reading_selection_window = 0; |
| 2857 | reading_which_selection = 0; |
| 2858 | |
| 2859 | property_change_wait_list = 0; |
| 2860 | prop_location_identifier = 0; |
| 2861 | property_change_reply = Fcons (Qnil, Qnil); |
| 2862 | staticpro (&property_change_reply); |
| 2863 | |
| 2864 | Vselection_alist = Qnil; |
| 2865 | staticpro (&Vselection_alist); |
| 2866 | |
| 2867 | DEFVAR_LISP ("selection-converter-alist", &Vselection_converter_alist, |
| 2868 | doc: /* An alist associating X Windows selection-types with functions. |
| 2869 | These functions are called to convert the selection, with three args: |
| 2870 | the name of the selection (typically `PRIMARY', `SECONDARY', or `CLIPBOARD'); |
| 2871 | a desired type to which the selection should be converted; |
| 2872 | and the local selection value (whatever was given to `x-own-selection'). |
| 2873 | |
| 2874 | The function should return the value to send to the X server |
| 2875 | \(typically a string). A return value of nil |
| 2876 | means that the conversion could not be done. |
| 2877 | A return value which is the symbol `NULL' |
| 2878 | means that a side-effect was executed, |
| 2879 | and there is no meaningful selection value. */); |
| 2880 | Vselection_converter_alist = Qnil; |
| 2881 | |
| 2882 | DEFVAR_LISP ("x-lost-selection-functions", &Vx_lost_selection_functions, |
| 2883 | doc: /* A list of functions to be called when Emacs loses an X selection. |
| 2884 | \(This happens when some other X client makes its own selection |
| 2885 | or when a Lisp program explicitly clears the selection.) |
| 2886 | The functions are called with one argument, the selection type |
| 2887 | \(a symbol, typically `PRIMARY', `SECONDARY', or `CLIPBOARD'). */); |
| 2888 | Vx_lost_selection_functions = Qnil; |
| 2889 | |
| 2890 | DEFVAR_LISP ("x-sent-selection-functions", &Vx_sent_selection_functions, |
| 2891 | doc: /* A list of functions to be called when Emacs answers a selection request. |
| 2892 | The functions are called with four arguments: |
| 2893 | - the selection name (typically `PRIMARY', `SECONDARY', or `CLIPBOARD'); |
| 2894 | - the selection-type which Emacs was asked to convert the |
| 2895 | selection into before sending (for example, `STRING' or `LENGTH'); |
| 2896 | - a flag indicating success or failure for responding to the request. |
| 2897 | We might have failed (and declined the request) for any number of reasons, |
| 2898 | including being asked for a selection that we no longer own, or being asked |
| 2899 | to convert into a type that we don't know about or that is inappropriate. |
| 2900 | This hook doesn't let you change the behavior of Emacs's selection replies, |
| 2901 | it merely informs you that they have happened. */); |
| 2902 | Vx_sent_selection_functions = Qnil; |
| 2903 | |
| 2904 | DEFVAR_LISP ("selection-coding-system", &Vselection_coding_system, |
| 2905 | doc: /* Coding system for communicating with other X clients. |
| 2906 | When sending or receiving text via cut_buffer, selection, and clipboard, |
| 2907 | the text is encoded or decoded by this coding system. |
| 2908 | The default value is `compound-text-with-extensions'. */); |
| 2909 | Vselection_coding_system = intern ("compound-text-with-extensions"); |
| 2910 | |
| 2911 | DEFVAR_LISP ("next-selection-coding-system", &Vnext_selection_coding_system, |
| 2912 | doc: /* Coding system for the next communication with other X clients. |
| 2913 | Usually, `selection-coding-system' is used for communicating with |
| 2914 | other X clients. But, if this variable is set, it is used for the |
| 2915 | next communication only. After the communication, this variable is |
| 2916 | set to nil. */); |
| 2917 | Vnext_selection_coding_system = Qnil; |
| 2918 | |
| 2919 | DEFVAR_INT ("x-selection-timeout", &x_selection_timeout, |
| 2920 | doc: /* Number of milliseconds to wait for a selection reply. |
| 2921 | If the selection owner doesn't reply in this time, we give up. |
| 2922 | A value of 0 means wait as long as necessary. This is initialized from the |
| 2923 | \"*selectionTimeout\" resource. */); |
| 2924 | x_selection_timeout = 0; |
| 2925 | |
| 2926 | QPRIMARY = intern ("PRIMARY"); staticpro (&QPRIMARY); |
| 2927 | QSECONDARY = intern ("SECONDARY"); staticpro (&QSECONDARY); |
| 2928 | QSTRING = intern ("STRING"); staticpro (&QSTRING); |
| 2929 | QINTEGER = intern ("INTEGER"); staticpro (&QINTEGER); |
| 2930 | QCLIPBOARD = intern ("CLIPBOARD"); staticpro (&QCLIPBOARD); |
| 2931 | QTIMESTAMP = intern ("TIMESTAMP"); staticpro (&QTIMESTAMP); |
| 2932 | QTEXT = intern ("TEXT"); staticpro (&QTEXT); |
| 2933 | QCOMPOUND_TEXT = intern ("COMPOUND_TEXT"); staticpro (&QCOMPOUND_TEXT); |
| 2934 | QUTF8_STRING = intern ("UTF8_STRING"); staticpro (&QUTF8_STRING); |
| 2935 | QTIMESTAMP = intern ("TIMESTAMP"); staticpro (&QTIMESTAMP); |
| 2936 | QDELETE = intern ("DELETE"); staticpro (&QDELETE); |
| 2937 | QMULTIPLE = intern ("MULTIPLE"); staticpro (&QMULTIPLE); |
| 2938 | QINCR = intern ("INCR"); staticpro (&QINCR); |
| 2939 | QEMACS_TMP = intern ("_EMACS_TMP_"); staticpro (&QEMACS_TMP); |
| 2940 | QTARGETS = intern ("TARGETS"); staticpro (&QTARGETS); |
| 2941 | QATOM = intern ("ATOM"); staticpro (&QATOM); |
| 2942 | QATOM_PAIR = intern ("ATOM_PAIR"); staticpro (&QATOM_PAIR); |
| 2943 | QNULL = intern ("NULL"); staticpro (&QNULL); |
| 2944 | Qcompound_text_with_extensions = intern ("compound-text-with-extensions"); |
| 2945 | staticpro (&Qcompound_text_with_extensions); |
| 2946 | |
| 2947 | #ifdef CUT_BUFFER_SUPPORT |
| 2948 | QCUT_BUFFER0 = intern ("CUT_BUFFER0"); staticpro (&QCUT_BUFFER0); |
| 2949 | QCUT_BUFFER1 = intern ("CUT_BUFFER1"); staticpro (&QCUT_BUFFER1); |
| 2950 | QCUT_BUFFER2 = intern ("CUT_BUFFER2"); staticpro (&QCUT_BUFFER2); |
| 2951 | QCUT_BUFFER3 = intern ("CUT_BUFFER3"); staticpro (&QCUT_BUFFER3); |
| 2952 | QCUT_BUFFER4 = intern ("CUT_BUFFER4"); staticpro (&QCUT_BUFFER4); |
| 2953 | QCUT_BUFFER5 = intern ("CUT_BUFFER5"); staticpro (&QCUT_BUFFER5); |
| 2954 | QCUT_BUFFER6 = intern ("CUT_BUFFER6"); staticpro (&QCUT_BUFFER6); |
| 2955 | QCUT_BUFFER7 = intern ("CUT_BUFFER7"); staticpro (&QCUT_BUFFER7); |
| 2956 | #endif |
| 2957 | |
| 2958 | Qforeign_selection = intern ("foreign-selection"); |
| 2959 | staticpro (&Qforeign_selection); |
| 2960 | } |
| 2961 | |
| 2962 | /* arch-tag: 7c293b0f-9918-4f69-8ac7-03e142307236 |
| 2963 | (do not change this comment) */ |