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