| 1 | /* Buffer manipulation primitives for GNU Emacs. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, 1995, 1997 |
| 3 | Free Software Foundation, Inc. |
| 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 | #include <sys/types.h> |
| 24 | #include <sys/stat.h> |
| 25 | #include <sys/param.h> |
| 26 | |
| 27 | #ifndef MAXPATHLEN |
| 28 | /* in 4.1, param.h fails to define this. */ |
| 29 | #define MAXPATHLEN 1024 |
| 30 | #endif /* not MAXPATHLEN */ |
| 31 | |
| 32 | #include <config.h> |
| 33 | #include "lisp.h" |
| 34 | #include "intervals.h" |
| 35 | #include "window.h" |
| 36 | #include "commands.h" |
| 37 | #include "buffer.h" |
| 38 | #include "charset.h" |
| 39 | #include "region-cache.h" |
| 40 | #include "indent.h" |
| 41 | #include "blockinput.h" |
| 42 | #include "frame.h" |
| 43 | |
| 44 | struct buffer *current_buffer; /* the current buffer */ |
| 45 | |
| 46 | /* First buffer in chain of all buffers (in reverse order of creation). |
| 47 | Threaded through ->next. */ |
| 48 | |
| 49 | struct buffer *all_buffers; |
| 50 | |
| 51 | /* This structure holds the default values of the buffer-local variables |
| 52 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. |
| 53 | The default value occupies the same slot in this structure |
| 54 | as an individual buffer's value occupies in that buffer. |
| 55 | Setting the default value also goes through the alist of buffers |
| 56 | and stores into each buffer that does not say it has a local value. */ |
| 57 | |
| 58 | struct buffer buffer_defaults; |
| 59 | |
| 60 | /* A Lisp_Object pointer to the above, used for staticpro */ |
| 61 | |
| 62 | static Lisp_Object Vbuffer_defaults; |
| 63 | |
| 64 | /* This structure marks which slots in a buffer have corresponding |
| 65 | default values in buffer_defaults. |
| 66 | Each such slot has a nonzero value in this structure. |
| 67 | The value has only one nonzero bit. |
| 68 | |
| 69 | When a buffer has its own local value for a slot, |
| 70 | the bit for that slot (found in the same slot in this structure) |
| 71 | is turned on in the buffer's local_var_flags slot. |
| 72 | |
| 73 | If a slot in this structure is -1, then even though there may |
| 74 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; |
| 75 | and the corresponding slot in buffer_defaults is not used. |
| 76 | |
| 77 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, |
| 78 | but there is a default value which is copied into each buffer. |
| 79 | |
| 80 | If a slot in this structure is negative, then even though there may |
| 81 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; |
| 82 | and the corresponding slot in buffer_defaults is not used. |
| 83 | |
| 84 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
| 85 | zero, that is a bug */ |
| 86 | |
| 87 | struct buffer buffer_local_flags; |
| 88 | |
| 89 | /* This structure holds the names of symbols whose values may be |
| 90 | buffer-local. It is indexed and accessed in the same way as the above. */ |
| 91 | |
| 92 | struct buffer buffer_local_symbols; |
| 93 | /* A Lisp_Object pointer to the above, used for staticpro */ |
| 94 | static Lisp_Object Vbuffer_local_symbols; |
| 95 | |
| 96 | /* This structure holds the required types for the values in the |
| 97 | buffer-local slots. If a slot contains Qnil, then the |
| 98 | corresponding buffer slot may contain a value of any type. If a |
| 99 | slot contains an integer, then prospective values' tags must be |
| 100 | equal to that integer. When a tag does not match, the function |
| 101 | buffer_slot_type_mismatch will signal an error. */ |
| 102 | struct buffer buffer_local_types; |
| 103 | |
| 104 | /* Flags indicating which built-in buffer-local variables |
| 105 | are permanent locals. */ |
| 106 | static int buffer_permanent_local_flags; |
| 107 | |
| 108 | Lisp_Object Fset_buffer (); |
| 109 | void set_buffer_internal (); |
| 110 | void set_buffer_internal_1 (); |
| 111 | static void call_overlay_mod_hooks (); |
| 112 | static void swap_out_buffer_local_variables (); |
| 113 | static void reset_buffer_local_variables (); |
| 114 | |
| 115 | /* Alist of all buffer names vs the buffers. */ |
| 116 | /* This used to be a variable, but is no longer, |
| 117 | to prevent lossage due to user rplac'ing this alist or its elements. */ |
| 118 | Lisp_Object Vbuffer_alist; |
| 119 | |
| 120 | /* Functions to call before and after each text change. */ |
| 121 | Lisp_Object Vbefore_change_function; |
| 122 | Lisp_Object Vafter_change_function; |
| 123 | Lisp_Object Vbefore_change_functions; |
| 124 | Lisp_Object Vafter_change_functions; |
| 125 | |
| 126 | Lisp_Object Vtransient_mark_mode; |
| 127 | |
| 128 | /* t means ignore all read-only text properties. |
| 129 | A list means ignore such a property if its value is a member of the list. |
| 130 | Any non-nil value means ignore buffer-read-only. */ |
| 131 | Lisp_Object Vinhibit_read_only; |
| 132 | |
| 133 | /* List of functions to call that can query about killing a buffer. |
| 134 | If any of these functions returns nil, we don't kill it. */ |
| 135 | Lisp_Object Vkill_buffer_query_functions; |
| 136 | |
| 137 | /* List of functions to call before changing an unmodified buffer. */ |
| 138 | Lisp_Object Vfirst_change_hook; |
| 139 | |
| 140 | Lisp_Object Qfirst_change_hook; |
| 141 | Lisp_Object Qbefore_change_functions; |
| 142 | Lisp_Object Qafter_change_functions; |
| 143 | |
| 144 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
| 145 | |
| 146 | Lisp_Object Qprotected_field; |
| 147 | |
| 148 | Lisp_Object QSFundamental; /* A string "Fundamental" */ |
| 149 | |
| 150 | Lisp_Object Qkill_buffer_hook; |
| 151 | |
| 152 | Lisp_Object Qget_file_buffer; |
| 153 | |
| 154 | Lisp_Object Qoverlayp; |
| 155 | |
| 156 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
| 157 | |
| 158 | Lisp_Object Qmodification_hooks; |
| 159 | Lisp_Object Qinsert_in_front_hooks; |
| 160 | Lisp_Object Qinsert_behind_hooks; |
| 161 | |
| 162 | /* For debugging; temporary. See set_buffer_internal. */ |
| 163 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ |
| 164 | |
| 165 | nsberror (spec) |
| 166 | Lisp_Object spec; |
| 167 | { |
| 168 | if (STRINGP (spec)) |
| 169 | error ("No buffer named %s", XSTRING (spec)->data); |
| 170 | error ("Invalid buffer argument"); |
| 171 | } |
| 172 | \f |
| 173 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
| 174 | "Return non-nil if OBJECT is a buffer which has not been killed.\n\ |
| 175 | Value is nil if OBJECT is not a buffer or if it has been killed.") |
| 176 | (object) |
| 177 | Lisp_Object object; |
| 178 | { |
| 179 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) |
| 180 | ? Qt : Qnil); |
| 181 | } |
| 182 | |
| 183 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
| 184 | "Return a list of all existing live buffers.\n\ |
| 185 | If the optional arg FRAME is a frame, we return that frame's buffer list.") |
| 186 | (frame) |
| 187 | Lisp_Object frame; |
| 188 | { |
| 189 | Lisp_Object framelist, general; |
| 190 | general = Fmapcar (Qcdr, Vbuffer_alist); |
| 191 | |
| 192 | if (FRAMEP (frame)) |
| 193 | { |
| 194 | Lisp_Object tail; |
| 195 | |
| 196 | CHECK_FRAME (frame, 1); |
| 197 | |
| 198 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); |
| 199 | |
| 200 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ |
| 201 | tail = framelist; |
| 202 | while (! NILP (tail)) |
| 203 | { |
| 204 | general = Fdelq (XCONS (tail)->car, general); |
| 205 | tail = XCONS (tail)->cdr; |
| 206 | } |
| 207 | return nconc2 (framelist, general); |
| 208 | } |
| 209 | |
| 210 | return general; |
| 211 | } |
| 212 | |
| 213 | /* Like Fassoc, but use Fstring_equal to compare |
| 214 | (which ignores text properties), |
| 215 | and don't ever QUIT. */ |
| 216 | |
| 217 | static Lisp_Object |
| 218 | assoc_ignore_text_properties (key, list) |
| 219 | register Lisp_Object key; |
| 220 | Lisp_Object list; |
| 221 | { |
| 222 | register Lisp_Object tail; |
| 223 | for (tail = list; !NILP (tail); tail = Fcdr (tail)) |
| 224 | { |
| 225 | register Lisp_Object elt, tem; |
| 226 | elt = Fcar (tail); |
| 227 | tem = Fstring_equal (Fcar (elt), key); |
| 228 | if (!NILP (tem)) |
| 229 | return elt; |
| 230 | } |
| 231 | return Qnil; |
| 232 | } |
| 233 | |
| 234 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
| 235 | "Return the buffer named NAME (a string).\n\ |
| 236 | If there is no live buffer named NAME, return nil.\n\ |
| 237 | NAME may also be a buffer; if so, the value is that buffer.") |
| 238 | (name) |
| 239 | register Lisp_Object name; |
| 240 | { |
| 241 | if (BUFFERP (name)) |
| 242 | return name; |
| 243 | CHECK_STRING (name, 0); |
| 244 | |
| 245 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
| 246 | } |
| 247 | |
| 248 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, |
| 249 | "Return the buffer visiting file FILENAME (a string).\n\ |
| 250 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.\n\ |
| 251 | If there is no such live buffer, return nil.\n\ |
| 252 | See also `find-buffer-visiting'.") |
| 253 | (filename) |
| 254 | register Lisp_Object filename; |
| 255 | { |
| 256 | register Lisp_Object tail, buf, tem; |
| 257 | Lisp_Object handler; |
| 258 | |
| 259 | CHECK_STRING (filename, 0); |
| 260 | filename = Fexpand_file_name (filename, Qnil); |
| 261 | |
| 262 | /* If the file name has special constructs in it, |
| 263 | call the corresponding file handler. */ |
| 264 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
| 265 | if (!NILP (handler)) |
| 266 | return call2 (handler, Qget_file_buffer, filename); |
| 267 | |
| 268 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
| 269 | { |
| 270 | buf = Fcdr (XCONS (tail)->car); |
| 271 | if (!BUFFERP (buf)) continue; |
| 272 | if (!STRINGP (XBUFFER (buf)->filename)) continue; |
| 273 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
| 274 | if (!NILP (tem)) |
| 275 | return buf; |
| 276 | } |
| 277 | return Qnil; |
| 278 | } |
| 279 | |
| 280 | Lisp_Object |
| 281 | get_truename_buffer (filename) |
| 282 | register Lisp_Object filename; |
| 283 | { |
| 284 | register Lisp_Object tail, buf, tem; |
| 285 | |
| 286 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
| 287 | { |
| 288 | buf = Fcdr (XCONS (tail)->car); |
| 289 | if (!BUFFERP (buf)) continue; |
| 290 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; |
| 291 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); |
| 292 | if (!NILP (tem)) |
| 293 | return buf; |
| 294 | } |
| 295 | return Qnil; |
| 296 | } |
| 297 | |
| 298 | /* Incremented for each buffer created, to assign the buffer number. */ |
| 299 | int buffer_count; |
| 300 | |
| 301 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
| 302 | "Return the buffer named NAME, or create such a buffer and return it.\n\ |
| 303 | A new buffer is created if there is no live buffer named NAME.\n\ |
| 304 | If NAME starts with a space, the new buffer does not keep undo information.\n\ |
| 305 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
| 306 | The value is never nil.") |
| 307 | (name) |
| 308 | register Lisp_Object name; |
| 309 | { |
| 310 | register Lisp_Object buf; |
| 311 | register struct buffer *b; |
| 312 | |
| 313 | buf = Fget_buffer (name); |
| 314 | if (!NILP (buf)) |
| 315 | return buf; |
| 316 | |
| 317 | if (XSTRING (name)->size == 0) |
| 318 | error ("Empty string for buffer name is not allowed"); |
| 319 | |
| 320 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
| 321 | |
| 322 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
| 323 | |
| 324 | /* An ordinary buffer uses its own struct buffer_text. */ |
| 325 | b->text = &b->own_text; |
| 326 | b->base_buffer = 0; |
| 327 | |
| 328 | BUF_GAP_SIZE (b) = 20; |
| 329 | BLOCK_INPUT; |
| 330 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
| 331 | anchoring a search. */ |
| 332 | BUFFER_ALLOC (BUF_BEG_ADDR (b), (BUF_GAP_SIZE (b) + 1)); |
| 333 | UNBLOCK_INPUT; |
| 334 | if (! BUF_BEG_ADDR (b)) |
| 335 | buffer_memory_full (); |
| 336 | |
| 337 | BUF_PT (b) = 1; |
| 338 | BUF_GPT (b) = 1; |
| 339 | BUF_BEGV (b) = 1; |
| 340 | BUF_ZV (b) = 1; |
| 341 | BUF_Z (b) = 1; |
| 342 | BUF_MODIFF (b) = 1; |
| 343 | BUF_OVERLAY_MODIFF (b) = 1; |
| 344 | BUF_SAVE_MODIFF (b) = 1; |
| 345 | BUF_INTERVALS (b) = 0; |
| 346 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
| 347 | |
| 348 | b->newline_cache = 0; |
| 349 | b->width_run_cache = 0; |
| 350 | b->width_table = Qnil; |
| 351 | |
| 352 | /* Put this on the chain of all buffers including killed ones. */ |
| 353 | b->next = all_buffers; |
| 354 | all_buffers = b; |
| 355 | |
| 356 | /* An ordinary buffer normally doesn't need markers |
| 357 | to handle BEGV and ZV. */ |
| 358 | b->pt_marker = Qnil; |
| 359 | b->begv_marker = Qnil; |
| 360 | b->zv_marker = Qnil; |
| 361 | |
| 362 | name = Fcopy_sequence (name); |
| 363 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); |
| 364 | b->name = name; |
| 365 | |
| 366 | if (XSTRING (name)->data[0] != ' ') |
| 367 | b->undo_list = Qnil; |
| 368 | else |
| 369 | b->undo_list = Qt; |
| 370 | |
| 371 | reset_buffer (b); |
| 372 | reset_buffer_local_variables (b, 1); |
| 373 | |
| 374 | /* Put this in the alist of all live buffers. */ |
| 375 | XSETBUFFER (buf, b); |
| 376 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
| 377 | |
| 378 | b->mark = Fmake_marker (); |
| 379 | BUF_MARKERS (b) = Qnil; |
| 380 | b->name = name; |
| 381 | return buf; |
| 382 | } |
| 383 | |
| 384 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, 2, 2, |
| 385 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
| 386 | "Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.\n\ |
| 387 | BASE-BUFFER should be an existing buffer (or buffer name).\n\ |
| 388 | NAME should be a string which is not the name of an existing buffer.") |
| 389 | (base_buffer, name) |
| 390 | register Lisp_Object base_buffer, name; |
| 391 | { |
| 392 | register Lisp_Object buf; |
| 393 | register struct buffer *b; |
| 394 | |
| 395 | buf = Fget_buffer (name); |
| 396 | if (!NILP (buf)) |
| 397 | error ("Buffer name `%s' is in use", XSTRING (name)->data); |
| 398 | |
| 399 | base_buffer = Fget_buffer (base_buffer); |
| 400 | if (NILP (base_buffer)) |
| 401 | error ("No such buffer: `%s'", |
| 402 | XSTRING (XBUFFER (base_buffer)->name)->data); |
| 403 | |
| 404 | if (XSTRING (name)->size == 0) |
| 405 | error ("Empty string for buffer name is not allowed"); |
| 406 | |
| 407 | b = (struct buffer *) xmalloc (sizeof (struct buffer)); |
| 408 | |
| 409 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
| 410 | |
| 411 | if (XBUFFER (base_buffer)->base_buffer) |
| 412 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; |
| 413 | else |
| 414 | b->base_buffer = XBUFFER (base_buffer); |
| 415 | |
| 416 | /* Use the base buffer's text object. */ |
| 417 | b->text = b->base_buffer->text; |
| 418 | |
| 419 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); |
| 420 | BUF_ZV (b) = BUF_ZV (b->base_buffer); |
| 421 | BUF_PT (b) = BUF_PT (b->base_buffer); |
| 422 | |
| 423 | b->newline_cache = 0; |
| 424 | b->width_run_cache = 0; |
| 425 | b->width_table = Qnil; |
| 426 | |
| 427 | /* Put this on the chain of all buffers including killed ones. */ |
| 428 | b->next = all_buffers; |
| 429 | all_buffers = b; |
| 430 | |
| 431 | name = Fcopy_sequence (name); |
| 432 | INITIALIZE_INTERVAL (XSTRING (name), NULL_INTERVAL); |
| 433 | b->name = name; |
| 434 | |
| 435 | reset_buffer (b); |
| 436 | reset_buffer_local_variables (b, 1); |
| 437 | |
| 438 | /* Put this in the alist of all live buffers. */ |
| 439 | XSETBUFFER (buf, b); |
| 440 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
| 441 | |
| 442 | b->mark = Fmake_marker (); |
| 443 | b->name = name; |
| 444 | |
| 445 | /* Make sure the base buffer has markers for its narrowing. */ |
| 446 | if (NILP (b->base_buffer->pt_marker)) |
| 447 | { |
| 448 | b->base_buffer->pt_marker = Fmake_marker (); |
| 449 | Fset_marker (b->base_buffer->pt_marker, |
| 450 | make_number (BUF_PT (b->base_buffer)), base_buffer); |
| 451 | } |
| 452 | if (NILP (b->base_buffer->begv_marker)) |
| 453 | { |
| 454 | b->base_buffer->begv_marker = Fmake_marker (); |
| 455 | Fset_marker (b->base_buffer->begv_marker, |
| 456 | make_number (BUF_BEGV (b->base_buffer)), base_buffer); |
| 457 | } |
| 458 | if (NILP (b->base_buffer->zv_marker)) |
| 459 | { |
| 460 | b->base_buffer->zv_marker = Fmake_marker (); |
| 461 | Fset_marker (b->base_buffer->zv_marker, |
| 462 | make_number (BUF_ZV (b->base_buffer)), base_buffer); |
| 463 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
| 464 | } |
| 465 | |
| 466 | /* Give the indirect buffer markers for its narrowing. */ |
| 467 | b->pt_marker = Fmake_marker (); |
| 468 | Fset_marker (b->pt_marker, make_number (BUF_PT (b)), buf); |
| 469 | b->begv_marker = Fmake_marker (); |
| 470 | Fset_marker (b->begv_marker, make_number (BUF_BEGV (b)), buf); |
| 471 | b->zv_marker = Fmake_marker (); |
| 472 | Fset_marker (b->zv_marker, make_number (BUF_ZV (b)), buf); |
| 473 | |
| 474 | XMARKER (b->zv_marker)->insertion_type = 1; |
| 475 | |
| 476 | return buf; |
| 477 | } |
| 478 | |
| 479 | /* Reinitialize everything about a buffer except its name and contents |
| 480 | and local variables. */ |
| 481 | |
| 482 | void |
| 483 | reset_buffer (b) |
| 484 | register struct buffer *b; |
| 485 | { |
| 486 | b->filename = Qnil; |
| 487 | b->file_truename = Qnil; |
| 488 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
| 489 | b->modtime = 0; |
| 490 | XSETFASTINT (b->save_length, 0); |
| 491 | b->last_window_start = 1; |
| 492 | /* It is more conservative to start out "changed" than "unchanged". */ |
| 493 | b->clip_changed = 1; |
| 494 | b->backed_up = Qnil; |
| 495 | b->auto_save_modified = 0; |
| 496 | b->auto_save_failure_time = -1; |
| 497 | b->auto_save_file_name = Qnil; |
| 498 | b->read_only = Qnil; |
| 499 | b->overlays_before = Qnil; |
| 500 | b->overlays_after = Qnil; |
| 501 | XSETFASTINT (b->overlay_center, 1); |
| 502 | b->mark_active = Qnil; |
| 503 | b->point_before_scroll = Qnil; |
| 504 | b->file_format = Qnil; |
| 505 | b->last_selected_window = Qnil; |
| 506 | XSETINT (b->display_count, 0); |
| 507 | b->extra2 = Qnil; |
| 508 | b->extra3 = Qnil; |
| 509 | } |
| 510 | |
| 511 | /* Reset buffer B's local variables info. |
| 512 | Don't use this on a buffer that has already been in use; |
| 513 | it does not treat permanent locals consistently. |
| 514 | Instead, use Fkill_all_local_variables. |
| 515 | |
| 516 | If PERMANENT_TOO is 1, then we reset permanent built-in |
| 517 | buffer-local variables. If PERMANENT_TOO is 0, |
| 518 | we preserve those. */ |
| 519 | |
| 520 | static void |
| 521 | reset_buffer_local_variables (b, permanent_too) |
| 522 | register struct buffer *b; |
| 523 | int permanent_too; |
| 524 | { |
| 525 | register int offset; |
| 526 | int dont_reset; |
| 527 | |
| 528 | /* Decide which built-in local variables to reset. */ |
| 529 | if (permanent_too) |
| 530 | dont_reset = 0; |
| 531 | else |
| 532 | dont_reset = buffer_permanent_local_flags; |
| 533 | |
| 534 | /* Reset the major mode to Fundamental, together with all the |
| 535 | things that depend on the major mode. |
| 536 | default-major-mode is handled at a higher level. |
| 537 | We ignore it here. */ |
| 538 | b->major_mode = Qfundamental_mode; |
| 539 | b->keymap = Qnil; |
| 540 | b->abbrev_table = Vfundamental_mode_abbrev_table; |
| 541 | b->mode_name = QSFundamental; |
| 542 | b->minor_modes = Qnil; |
| 543 | |
| 544 | /* If the standard case table has been altered and invalidated, |
| 545 | fix up its insides first. */ |
| 546 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) |
| 547 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) |
| 548 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) |
| 549 | Fset_standard_case_table (Vascii_downcase_table); |
| 550 | |
| 551 | b->downcase_table = Vascii_downcase_table; |
| 552 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
| 553 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; |
| 554 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; |
| 555 | b->invisibility_spec = Qt; |
| 556 | #ifndef DOS_NT |
| 557 | b->buffer_file_type = Qnil; |
| 558 | #endif |
| 559 | |
| 560 | #if 0 |
| 561 | b->sort_table = XSTRING (Vascii_sort_table); |
| 562 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); |
| 563 | #endif /* 0 */ |
| 564 | |
| 565 | /* Reset all (or most) per-buffer variables to their defaults. */ |
| 566 | b->local_var_alist = Qnil; |
| 567 | b->local_var_flags &= dont_reset; |
| 568 | |
| 569 | /* For each slot that has a default value, |
| 570 | copy that into the slot. */ |
| 571 | |
| 572 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; |
| 573 | offset < sizeof (struct buffer); |
| 574 | offset += sizeof (Lisp_Object)) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
| 575 | { |
| 576 | int flag = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
| 577 | if ((flag > 0 |
| 578 | /* Don't reset a permanent local. */ |
| 579 | && ! (dont_reset & flag)) |
| 580 | || flag == -2) |
| 581 | *(Lisp_Object *)(offset + (char *)b) |
| 582 | = *(Lisp_Object *)(offset + (char *)&buffer_defaults); |
| 583 | } |
| 584 | } |
| 585 | |
| 586 | /* We split this away from generate-new-buffer, because rename-buffer |
| 587 | and set-visited-file-name ought to be able to use this to really |
| 588 | rename the buffer properly. */ |
| 589 | |
| 590 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, |
| 591 | 1, 2, 0, |
| 592 | "Return a string that is the name of no existing buffer based on NAME.\n\ |
| 593 | If there is no live buffer named NAME, then return NAME.\n\ |
| 594 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
| 595 | until an unused name is found, and then return that name.\n\ |
| 596 | Optional second argument IGNORE specifies a name that is okay to use\n\ |
| 597 | \(if it is in the sequence to be tried)\n\ |
| 598 | even if a buffer with that name exists.") |
| 599 | (name, ignore) |
| 600 | register Lisp_Object name, ignore; |
| 601 | { |
| 602 | register Lisp_Object gentemp, tem; |
| 603 | int count; |
| 604 | char number[10]; |
| 605 | |
| 606 | CHECK_STRING (name, 0); |
| 607 | |
| 608 | tem = Fget_buffer (name); |
| 609 | if (NILP (tem)) |
| 610 | return name; |
| 611 | |
| 612 | count = 1; |
| 613 | while (1) |
| 614 | { |
| 615 | sprintf (number, "<%d>", ++count); |
| 616 | gentemp = concat2 (name, build_string (number)); |
| 617 | tem = Fstring_equal (gentemp, ignore); |
| 618 | if (!NILP (tem)) |
| 619 | return gentemp; |
| 620 | tem = Fget_buffer (gentemp); |
| 621 | if (NILP (tem)) |
| 622 | return gentemp; |
| 623 | } |
| 624 | } |
| 625 | |
| 626 | \f |
| 627 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
| 628 | "Return the name of BUFFER, as a string.\n\ |
| 629 | With no argument or nil as argument, return the name of the current buffer.") |
| 630 | (buffer) |
| 631 | register Lisp_Object buffer; |
| 632 | { |
| 633 | if (NILP (buffer)) |
| 634 | return current_buffer->name; |
| 635 | CHECK_BUFFER (buffer, 0); |
| 636 | return XBUFFER (buffer)->name; |
| 637 | } |
| 638 | |
| 639 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
| 640 | "Return name of file BUFFER is visiting, or nil if none.\n\ |
| 641 | No argument or nil as argument means use the current buffer.") |
| 642 | (buffer) |
| 643 | register Lisp_Object buffer; |
| 644 | { |
| 645 | if (NILP (buffer)) |
| 646 | return current_buffer->filename; |
| 647 | CHECK_BUFFER (buffer, 0); |
| 648 | return XBUFFER (buffer)->filename; |
| 649 | } |
| 650 | |
| 651 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
| 652 | 0, 1, 0, |
| 653 | "Return the base buffer of indirect buffer BUFFER.\n\ |
| 654 | If BUFFER is not indirect, return nil.") |
| 655 | (buffer) |
| 656 | register Lisp_Object buffer; |
| 657 | { |
| 658 | struct buffer *base; |
| 659 | Lisp_Object base_buffer; |
| 660 | |
| 661 | if (NILP (buffer)) |
| 662 | base = current_buffer->base_buffer; |
| 663 | else |
| 664 | { |
| 665 | CHECK_BUFFER (buffer, 0); |
| 666 | base = XBUFFER (buffer)->base_buffer; |
| 667 | } |
| 668 | |
| 669 | if (! base) |
| 670 | return Qnil; |
| 671 | XSETBUFFER (base_buffer, base); |
| 672 | return base_buffer; |
| 673 | } |
| 674 | |
| 675 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
| 676 | Sbuffer_local_variables, 0, 1, 0, |
| 677 | "Return an alist of variables that are buffer-local in BUFFER.\n\ |
| 678 | Most elements look like (SYMBOL . VALUE), describing one variable.\n\ |
| 679 | For a symbol that is locally unbound, just the symbol appears in the value.\n\ |
| 680 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
| 681 | No argument or nil as argument means use current buffer as BUFFER.") |
| 682 | (buffer) |
| 683 | register Lisp_Object buffer; |
| 684 | { |
| 685 | register struct buffer *buf; |
| 686 | register Lisp_Object result; |
| 687 | |
| 688 | if (NILP (buffer)) |
| 689 | buf = current_buffer; |
| 690 | else |
| 691 | { |
| 692 | CHECK_BUFFER (buffer, 0); |
| 693 | buf = XBUFFER (buffer); |
| 694 | } |
| 695 | |
| 696 | result = Qnil; |
| 697 | |
| 698 | { |
| 699 | register Lisp_Object tail; |
| 700 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
| 701 | { |
| 702 | Lisp_Object val, elt; |
| 703 | |
| 704 | elt = XCONS (tail)->car; |
| 705 | |
| 706 | /* Reference each variable in the alist in buf. |
| 707 | If inquiring about the current buffer, this gets the current values, |
| 708 | so store them into the alist so the alist is up to date. |
| 709 | If inquiring about some other buffer, this swaps out any values |
| 710 | for that buffer, making the alist up to date automatically. */ |
| 711 | val = find_symbol_value (XCONS (elt)->car); |
| 712 | /* Use the current buffer value only if buf is the current buffer. */ |
| 713 | if (buf != current_buffer) |
| 714 | val = XCONS (elt)->cdr; |
| 715 | |
| 716 | /* If symbol is unbound, put just the symbol in the list. */ |
| 717 | if (EQ (val, Qunbound)) |
| 718 | result = Fcons (XCONS (elt)->car, result); |
| 719 | /* Otherwise, put (symbol . value) in the list. */ |
| 720 | else |
| 721 | result = Fcons (Fcons (XCONS (elt)->car, val), result); |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | /* Add on all the variables stored in special slots. */ |
| 726 | { |
| 727 | register int offset, mask; |
| 728 | |
| 729 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; |
| 730 | offset < sizeof (struct buffer); |
| 731 | offset += (sizeof (EMACS_INT))) /* sizeof EMACS_INT == sizeof Lisp_Object */ |
| 732 | { |
| 733 | mask = XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_flags)); |
| 734 | if (mask == -1 || (buf->local_var_flags & mask)) |
| 735 | if (SYMBOLP (*(Lisp_Object *)(offset |
| 736 | + (char *)&buffer_local_symbols))) |
| 737 | result = Fcons (Fcons (*((Lisp_Object *) |
| 738 | (offset + (char *)&buffer_local_symbols)), |
| 739 | *(Lisp_Object *)(offset + (char *)buf)), |
| 740 | result); |
| 741 | } |
| 742 | } |
| 743 | |
| 744 | return result; |
| 745 | } |
| 746 | |
| 747 | \f |
| 748 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
| 749 | 0, 1, 0, |
| 750 | "Return t if BUFFER was modified since its file was last read or saved.\n\ |
| 751 | No argument or nil as argument means use current buffer as BUFFER.") |
| 752 | (buffer) |
| 753 | register Lisp_Object buffer; |
| 754 | { |
| 755 | register struct buffer *buf; |
| 756 | if (NILP (buffer)) |
| 757 | buf = current_buffer; |
| 758 | else |
| 759 | { |
| 760 | CHECK_BUFFER (buffer, 0); |
| 761 | buf = XBUFFER (buffer); |
| 762 | } |
| 763 | |
| 764 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
| 765 | } |
| 766 | |
| 767 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
| 768 | 1, 1, 0, |
| 769 | "Mark current buffer as modified or unmodified according to FLAG.\n\ |
| 770 | A non-nil FLAG means mark the buffer modified.") |
| 771 | (flag) |
| 772 | register Lisp_Object flag; |
| 773 | { |
| 774 | register int already; |
| 775 | register Lisp_Object fn; |
| 776 | |
| 777 | #ifdef CLASH_DETECTION |
| 778 | /* If buffer becoming modified, lock the file. |
| 779 | If buffer becoming unmodified, unlock the file. */ |
| 780 | |
| 781 | fn = current_buffer->file_truename; |
| 782 | if (!NILP (fn)) |
| 783 | { |
| 784 | already = SAVE_MODIFF < MODIFF; |
| 785 | if (!already && !NILP (flag)) |
| 786 | lock_file (fn); |
| 787 | else if (already && NILP (flag)) |
| 788 | unlock_file (fn); |
| 789 | } |
| 790 | #endif /* CLASH_DETECTION */ |
| 791 | |
| 792 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
| 793 | update_mode_lines++; |
| 794 | return flag; |
| 795 | } |
| 796 | |
| 797 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
| 798 | 0, 1, 0, |
| 799 | "Return BUFFER's tick counter, incremented for each change in text.\n\ |
| 800 | Each buffer has a tick counter which is incremented each time the text in\n\ |
| 801 | that buffer is changed. It wraps around occasionally.\n\ |
| 802 | No argument or nil as argument means use current buffer as BUFFER.") |
| 803 | (buffer) |
| 804 | register Lisp_Object buffer; |
| 805 | { |
| 806 | register struct buffer *buf; |
| 807 | if (NILP (buffer)) |
| 808 | buf = current_buffer; |
| 809 | else |
| 810 | { |
| 811 | CHECK_BUFFER (buffer, 0); |
| 812 | buf = XBUFFER (buffer); |
| 813 | } |
| 814 | |
| 815 | return make_number (BUF_MODIFF (buf)); |
| 816 | } |
| 817 | \f |
| 818 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
| 819 | "sRename buffer (to new name): \nP", |
| 820 | "Change current buffer's name to NEWNAME (a string).\n\ |
| 821 | If second arg UNIQUE is nil or omitted, it is an error if a\n\ |
| 822 | buffer named NEWNAME already exists.\n\ |
| 823 | If UNIQUE is non-nil, come up with a new name using\n\ |
| 824 | `generate-new-buffer-name'.\n\ |
| 825 | Interactively, you can set UNIQUE with a prefix argument.\n\ |
| 826 | We return the name we actually gave the buffer.\n\ |
| 827 | This does not change the name of the visited file (if any).") |
| 828 | (newname, unique) |
| 829 | register Lisp_Object newname, unique; |
| 830 | { |
| 831 | register Lisp_Object tem, buf; |
| 832 | |
| 833 | CHECK_STRING (newname, 0); |
| 834 | |
| 835 | if (XSTRING (newname)->size == 0) |
| 836 | error ("Empty string is invalid as a buffer name"); |
| 837 | |
| 838 | tem = Fget_buffer (newname); |
| 839 | /* Don't short-circuit if UNIQUE is t. That is a useful way to rename |
| 840 | the buffer automatically so you can create another with the original name. |
| 841 | It makes UNIQUE equivalent to |
| 842 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ |
| 843 | if (NILP (unique) && XBUFFER (tem) == current_buffer) |
| 844 | return current_buffer->name; |
| 845 | if (!NILP (tem)) |
| 846 | { |
| 847 | if (!NILP (unique)) |
| 848 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
| 849 | else |
| 850 | error ("Buffer name `%s' is in use", XSTRING (newname)->data); |
| 851 | } |
| 852 | |
| 853 | current_buffer->name = newname; |
| 854 | |
| 855 | /* Catch redisplay's attention. Unless we do this, the mode lines for |
| 856 | any windows displaying current_buffer will stay unchanged. */ |
| 857 | update_mode_lines++; |
| 858 | |
| 859 | XSETBUFFER (buf, current_buffer); |
| 860 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
| 861 | if (NILP (current_buffer->filename) |
| 862 | && !NILP (current_buffer->auto_save_file_name)) |
| 863 | call0 (intern ("rename-auto-save-file")); |
| 864 | /* Refetch since that last call may have done GC. */ |
| 865 | return current_buffer->name; |
| 866 | } |
| 867 | |
| 868 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 2, 0, |
| 869 | "Return most recently selected buffer other than BUFFER.\n\ |
| 870 | Buffers not visible in windows are preferred to visible buffers,\n\ |
| 871 | unless optional second argument VISIBLE-OK is non-nil.\n\ |
| 872 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
| 873 | If BUFFER is omitted or nil, some interesting buffer is returned.") |
| 874 | (buffer, visible_ok) |
| 875 | register Lisp_Object buffer, visible_ok; |
| 876 | { |
| 877 | Lisp_Object Fset_buffer_major_mode (); |
| 878 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
| 879 | notsogood = Qnil; |
| 880 | |
| 881 | tail = Vbuffer_alist; |
| 882 | pred = frame_buffer_predicate (); |
| 883 | |
| 884 | /* Consider buffers that have been seen in the selected frame |
| 885 | before other buffers. */ |
| 886 | |
| 887 | tem = frame_buffer_list (); |
| 888 | add_ons = Qnil; |
| 889 | while (CONSP (tem)) |
| 890 | { |
| 891 | if (BUFFERP (XCONS (tem)->car)) |
| 892 | add_ons = Fcons (Fcons (Qnil, XCONS (tem)->car), add_ons); |
| 893 | tem = XCONS (tem)->cdr; |
| 894 | } |
| 895 | tail = nconc2 (Fnreverse (add_ons), tail); |
| 896 | |
| 897 | for (; !NILP (tail); tail = Fcdr (tail)) |
| 898 | { |
| 899 | buf = Fcdr (Fcar (tail)); |
| 900 | if (EQ (buf, buffer)) |
| 901 | continue; |
| 902 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') |
| 903 | continue; |
| 904 | /* If the selected frame has a buffer_predicate, |
| 905 | disregard buffers that don't fit the predicate. */ |
| 906 | if (!NILP (pred)) |
| 907 | { |
| 908 | tem = call1 (pred, buf); |
| 909 | if (NILP (tem)) |
| 910 | continue; |
| 911 | } |
| 912 | |
| 913 | if (NILP (visible_ok)) |
| 914 | tem = Fget_buffer_window (buf, Qt); |
| 915 | else |
| 916 | tem = Qnil; |
| 917 | if (NILP (tem)) |
| 918 | return buf; |
| 919 | if (NILP (notsogood)) |
| 920 | notsogood = buf; |
| 921 | } |
| 922 | if (!NILP (notsogood)) |
| 923 | return notsogood; |
| 924 | buf = Fget_buffer_create (build_string ("*scratch*")); |
| 925 | Fset_buffer_major_mode (buf); |
| 926 | return buf; |
| 927 | } |
| 928 | \f |
| 929 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, |
| 930 | 0, 1, "", |
| 931 | "Make BUFFER stop keeping undo information.\n\ |
| 932 | No argument or nil as argument means do this for the current buffer.") |
| 933 | (buffer) |
| 934 | register Lisp_Object buffer; |
| 935 | { |
| 936 | Lisp_Object real_buffer; |
| 937 | |
| 938 | if (NILP (buffer)) |
| 939 | XSETBUFFER (real_buffer, current_buffer); |
| 940 | else |
| 941 | { |
| 942 | real_buffer = Fget_buffer (buffer); |
| 943 | if (NILP (real_buffer)) |
| 944 | nsberror (buffer); |
| 945 | } |
| 946 | |
| 947 | XBUFFER (real_buffer)->undo_list = Qt; |
| 948 | |
| 949 | return Qnil; |
| 950 | } |
| 951 | |
| 952 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
| 953 | 0, 1, "", |
| 954 | "Start keeping undo information for buffer BUFFER.\n\ |
| 955 | No argument or nil as argument means do this for the current buffer.") |
| 956 | (buffer) |
| 957 | register Lisp_Object buffer; |
| 958 | { |
| 959 | Lisp_Object real_buffer; |
| 960 | |
| 961 | if (NILP (buffer)) |
| 962 | XSETBUFFER (real_buffer, current_buffer); |
| 963 | else |
| 964 | { |
| 965 | real_buffer = Fget_buffer (buffer); |
| 966 | if (NILP (real_buffer)) |
| 967 | nsberror (buffer); |
| 968 | } |
| 969 | |
| 970 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
| 971 | XBUFFER (real_buffer)->undo_list = Qnil; |
| 972 | |
| 973 | return Qnil; |
| 974 | } |
| 975 | |
| 976 | /* |
| 977 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ |
| 978 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
| 979 | The buffer being killed will be current while the hook is running.\n\ |
| 980 | See `kill-buffer'." |
| 981 | */ |
| 982 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", |
| 983 | "Kill the buffer BUFFER.\n\ |
| 984 | The argument may be a buffer or may be the name of a buffer.\n\ |
| 985 | An argument of nil means kill the current buffer.\n\n\ |
| 986 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ |
| 987 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ |
| 988 | if not void, is a list of functions to be called, with no arguments,\n\ |
| 989 | before the buffer is actually killed. The buffer to be killed is current\n\ |
| 990 | when the hook functions are called.\n\n\ |
| 991 | Any processes that have this buffer as the `process-buffer' are killed\n\ |
| 992 | with SIGHUP.") |
| 993 | (buffer) |
| 994 | Lisp_Object buffer; |
| 995 | { |
| 996 | Lisp_Object buf; |
| 997 | register struct buffer *b; |
| 998 | register Lisp_Object tem; |
| 999 | register struct Lisp_Marker *m; |
| 1000 | struct gcpro gcpro1, gcpro2; |
| 1001 | |
| 1002 | if (NILP (buffer)) |
| 1003 | buf = Fcurrent_buffer (); |
| 1004 | else |
| 1005 | buf = Fget_buffer (buffer); |
| 1006 | if (NILP (buf)) |
| 1007 | nsberror (buffer); |
| 1008 | |
| 1009 | b = XBUFFER (buf); |
| 1010 | |
| 1011 | /* Avoid trouble for buffer already dead. */ |
| 1012 | if (NILP (b->name)) |
| 1013 | return Qnil; |
| 1014 | |
| 1015 | /* Query if the buffer is still modified. */ |
| 1016 | if (INTERACTIVE && !NILP (b->filename) |
| 1017 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
| 1018 | { |
| 1019 | GCPRO1 (buf); |
| 1020 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
| 1021 | XSTRING (b->name)->data)); |
| 1022 | UNGCPRO; |
| 1023 | if (NILP (tem)) |
| 1024 | return Qnil; |
| 1025 | } |
| 1026 | |
| 1027 | /* Run hooks with the buffer to be killed the current buffer. */ |
| 1028 | { |
| 1029 | register Lisp_Object val; |
| 1030 | int count = specpdl_ptr - specpdl; |
| 1031 | Lisp_Object list; |
| 1032 | |
| 1033 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 1034 | set_buffer_internal (b); |
| 1035 | |
| 1036 | /* First run the query functions; if any query is answered no, |
| 1037 | don't kill the buffer. */ |
| 1038 | for (list = Vkill_buffer_query_functions; !NILP (list); list = Fcdr (list)) |
| 1039 | { |
| 1040 | tem = call0 (Fcar (list)); |
| 1041 | if (NILP (tem)) |
| 1042 | return unbind_to (count, Qnil); |
| 1043 | } |
| 1044 | |
| 1045 | /* Then run the hooks. */ |
| 1046 | if (!NILP (Vrun_hooks)) |
| 1047 | call1 (Vrun_hooks, Qkill_buffer_hook); |
| 1048 | unbind_to (count, Qnil); |
| 1049 | } |
| 1050 | |
| 1051 | /* We have no more questions to ask. Verify that it is valid |
| 1052 | to kill the buffer. This must be done after the questions |
| 1053 | since anything can happen within do_yes_or_no_p. */ |
| 1054 | |
| 1055 | /* Don't kill the minibuffer now current. */ |
| 1056 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) |
| 1057 | return Qnil; |
| 1058 | |
| 1059 | if (NILP (b->name)) |
| 1060 | return Qnil; |
| 1061 | |
| 1062 | /* When we kill a base buffer, kill all its indirect buffers. |
| 1063 | We do it at this stage so nothing terrible happens if they |
| 1064 | ask questions or their hooks get errors. */ |
| 1065 | if (! b->base_buffer) |
| 1066 | { |
| 1067 | struct buffer *other; |
| 1068 | |
| 1069 | GCPRO1 (buf); |
| 1070 | |
| 1071 | for (other = all_buffers; other; other = other->next) |
| 1072 | /* all_buffers contains dead buffers too; |
| 1073 | don't re-kill them. */ |
| 1074 | if (other->base_buffer == b && !NILP (other->name)) |
| 1075 | { |
| 1076 | Lisp_Object buf; |
| 1077 | XSETBUFFER (buf, other); |
| 1078 | Fkill_buffer (buf); |
| 1079 | } |
| 1080 | |
| 1081 | UNGCPRO; |
| 1082 | } |
| 1083 | |
| 1084 | /* Make this buffer not be current. |
| 1085 | In the process, notice if this is the sole visible buffer |
| 1086 | and give up if so. */ |
| 1087 | if (b == current_buffer) |
| 1088 | { |
| 1089 | tem = Fother_buffer (buf, Qnil); |
| 1090 | Fset_buffer (tem); |
| 1091 | if (b == current_buffer) |
| 1092 | return Qnil; |
| 1093 | } |
| 1094 | |
| 1095 | /* Now there is no question: we can kill the buffer. */ |
| 1096 | |
| 1097 | #ifdef CLASH_DETECTION |
| 1098 | /* Unlock this buffer's file, if it is locked. */ |
| 1099 | unlock_buffer (b); |
| 1100 | #endif /* CLASH_DETECTION */ |
| 1101 | |
| 1102 | kill_buffer_processes (buf); |
| 1103 | |
| 1104 | tem = Vinhibit_quit; |
| 1105 | Vinhibit_quit = Qt; |
| 1106 | replace_buffer_in_all_windows (buf); |
| 1107 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
| 1108 | frames_discard_buffer (buf); |
| 1109 | Vinhibit_quit = tem; |
| 1110 | |
| 1111 | /* Delete any auto-save file, if we saved it in this session. */ |
| 1112 | if (STRINGP (b->auto_save_file_name) |
| 1113 | && b->auto_save_modified != 0 |
| 1114 | && SAVE_MODIFF < b->auto_save_modified) |
| 1115 | { |
| 1116 | Lisp_Object tem; |
| 1117 | tem = Fsymbol_value (intern ("delete-auto-save-files")); |
| 1118 | if (! NILP (tem)) |
| 1119 | internal_delete_file (b->auto_save_file_name); |
| 1120 | } |
| 1121 | |
| 1122 | if (b->base_buffer) |
| 1123 | { |
| 1124 | /* Unchain all markers that belong to this indirect buffer. |
| 1125 | Don't unchain the markers that belong to the base buffer |
| 1126 | or its other indirect buffers. */ |
| 1127 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
| 1128 | { |
| 1129 | Lisp_Object next; |
| 1130 | m = XMARKER (tem); |
| 1131 | next = m->chain; |
| 1132 | if (m->buffer == b) |
| 1133 | unchain_marker (tem); |
| 1134 | tem = next; |
| 1135 | } |
| 1136 | } |
| 1137 | else |
| 1138 | { |
| 1139 | /* Unchain all markers of this buffer and its indirect buffers. |
| 1140 | and leave them pointing nowhere. */ |
| 1141 | for (tem = BUF_MARKERS (b); !NILP (tem); ) |
| 1142 | { |
| 1143 | m = XMARKER (tem); |
| 1144 | m->buffer = 0; |
| 1145 | tem = m->chain; |
| 1146 | m->chain = Qnil; |
| 1147 | } |
| 1148 | BUF_MARKERS (b) = Qnil; |
| 1149 | |
| 1150 | #ifdef USE_TEXT_PROPERTIES |
| 1151 | BUF_INTERVALS (b) = NULL_INTERVAL; |
| 1152 | #endif |
| 1153 | |
| 1154 | /* Perhaps we should explicitly free the interval tree here... */ |
| 1155 | } |
| 1156 | |
| 1157 | /* Reset the local variables, so that this buffer's local values |
| 1158 | won't be protected from GC. They would be protected |
| 1159 | if they happened to remain encached in their symbols. |
| 1160 | This gets rid of them for certain. */ |
| 1161 | swap_out_buffer_local_variables (b); |
| 1162 | reset_buffer_local_variables (b, 1); |
| 1163 | |
| 1164 | b->name = Qnil; |
| 1165 | |
| 1166 | BLOCK_INPUT; |
| 1167 | if (! b->base_buffer) |
| 1168 | BUFFER_FREE (BUF_BEG_ADDR (b)); |
| 1169 | |
| 1170 | if (b->newline_cache) |
| 1171 | { |
| 1172 | free_region_cache (b->newline_cache); |
| 1173 | b->newline_cache = 0; |
| 1174 | } |
| 1175 | if (b->width_run_cache) |
| 1176 | { |
| 1177 | free_region_cache (b->width_run_cache); |
| 1178 | b->width_run_cache = 0; |
| 1179 | } |
| 1180 | b->width_table = Qnil; |
| 1181 | UNBLOCK_INPUT; |
| 1182 | b->undo_list = Qnil; |
| 1183 | |
| 1184 | return Qt; |
| 1185 | } |
| 1186 | \f |
| 1187 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
| 1188 | we do this each time BUF is selected visibly, the more recently |
| 1189 | selected buffers are always closer to the front of the list. This |
| 1190 | means that other_buffer is more likely to choose a relevant buffer. */ |
| 1191 | |
| 1192 | record_buffer (buf) |
| 1193 | Lisp_Object buf; |
| 1194 | { |
| 1195 | register Lisp_Object link, prev; |
| 1196 | |
| 1197 | prev = Qnil; |
| 1198 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) |
| 1199 | { |
| 1200 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) |
| 1201 | break; |
| 1202 | prev = link; |
| 1203 | } |
| 1204 | |
| 1205 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
| 1206 | we cannot use Fdelq itself here because it allows quitting. */ |
| 1207 | |
| 1208 | if (NILP (prev)) |
| 1209 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
| 1210 | else |
| 1211 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; |
| 1212 | |
| 1213 | XCONS (link)->cdr = Vbuffer_alist; |
| 1214 | Vbuffer_alist = link; |
| 1215 | |
| 1216 | /* Now move this buffer to the front of frame_buffer_list also. */ |
| 1217 | |
| 1218 | prev = Qnil; |
| 1219 | for (link = frame_buffer_list (); CONSP (link); link = XCONS (link)->cdr) |
| 1220 | { |
| 1221 | if (EQ (XCONS (link)->car, buf)) |
| 1222 | break; |
| 1223 | prev = link; |
| 1224 | } |
| 1225 | |
| 1226 | /* Effectively do delq. */ |
| 1227 | |
| 1228 | if (CONSP (link)) |
| 1229 | { |
| 1230 | if (NILP (prev)) |
| 1231 | set_frame_buffer_list (XCONS (frame_buffer_list ())->cdr); |
| 1232 | else |
| 1233 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; |
| 1234 | |
| 1235 | XCONS (link)->cdr = frame_buffer_list (); |
| 1236 | set_frame_buffer_list (link); |
| 1237 | } |
| 1238 | else |
| 1239 | set_frame_buffer_list (Fcons (buf, frame_buffer_list ())); |
| 1240 | } |
| 1241 | |
| 1242 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
| 1243 | "Set an appropriate major mode for BUFFER, according to `default-major-mode'.\n\ |
| 1244 | Use this function before selecting the buffer, since it may need to inspect\n\ |
| 1245 | the current buffer's major mode.") |
| 1246 | (buffer) |
| 1247 | Lisp_Object buffer; |
| 1248 | { |
| 1249 | int count; |
| 1250 | Lisp_Object function; |
| 1251 | |
| 1252 | function = buffer_defaults.major_mode; |
| 1253 | if (NILP (function) && NILP (Fget (current_buffer->major_mode, Qmode_class))) |
| 1254 | function = current_buffer->major_mode; |
| 1255 | |
| 1256 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
| 1257 | return Qnil; |
| 1258 | |
| 1259 | count = specpdl_ptr - specpdl; |
| 1260 | |
| 1261 | /* To select a nonfundamental mode, |
| 1262 | select the buffer temporarily and then call the mode function. */ |
| 1263 | |
| 1264 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 1265 | |
| 1266 | Fset_buffer (buffer); |
| 1267 | call0 (function); |
| 1268 | |
| 1269 | return unbind_to (count, Qnil); |
| 1270 | } |
| 1271 | |
| 1272 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
| 1273 | "Select buffer BUFFER in the current window.\n\ |
| 1274 | BUFFER may be a buffer or a buffer name.\n\ |
| 1275 | Optional second arg NORECORD non-nil means\n\ |
| 1276 | do not put this buffer at the front of the list of recently selected ones.\n\ |
| 1277 | \n\ |
| 1278 | WARNING: This is NOT the way to work on another buffer temporarily\n\ |
| 1279 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ |
| 1280 | the window-buffer correspondences.") |
| 1281 | (buffer, norecord) |
| 1282 | Lisp_Object buffer, norecord; |
| 1283 | { |
| 1284 | register Lisp_Object buf; |
| 1285 | Lisp_Object tem; |
| 1286 | |
| 1287 | if (EQ (minibuf_window, selected_window)) |
| 1288 | error ("Cannot switch buffers in minibuffer window"); |
| 1289 | tem = Fwindow_dedicated_p (selected_window); |
| 1290 | if (!NILP (tem)) |
| 1291 | error ("Cannot switch buffers in a dedicated window"); |
| 1292 | |
| 1293 | if (NILP (buffer)) |
| 1294 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
| 1295 | else |
| 1296 | { |
| 1297 | buf = Fget_buffer (buffer); |
| 1298 | if (NILP (buf)) |
| 1299 | { |
| 1300 | buf = Fget_buffer_create (buffer); |
| 1301 | Fset_buffer_major_mode (buf); |
| 1302 | } |
| 1303 | } |
| 1304 | Fset_buffer (buf); |
| 1305 | if (NILP (norecord)) |
| 1306 | record_buffer (buf); |
| 1307 | |
| 1308 | Fset_window_buffer (EQ (selected_window, minibuf_window) |
| 1309 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
| 1310 | : selected_window, |
| 1311 | buf); |
| 1312 | |
| 1313 | return buf; |
| 1314 | } |
| 1315 | |
| 1316 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
| 1317 | "Select buffer BUFFER in some window, preferably a different one.\n\ |
| 1318 | If BUFFER is nil, then some other buffer is chosen.\n\ |
| 1319 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ |
| 1320 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ |
| 1321 | window even if BUFFER is already visible in the selected window.\n\ |
| 1322 | This uses the function `display-buffer' as a subroutine; see the documentation\n\ |
| 1323 | of `display-buffer' for additional customization information.\n\ |
| 1324 | \n\ |
| 1325 | Optional third arg NORECORD non-nil means\n\ |
| 1326 | do not put this buffer at the front of the list of recently selected ones.") |
| 1327 | (buffer, other_window, norecord) |
| 1328 | Lisp_Object buffer, other_window, norecord; |
| 1329 | { |
| 1330 | register Lisp_Object buf; |
| 1331 | if (NILP (buffer)) |
| 1332 | buf = Fother_buffer (Fcurrent_buffer (), Qnil); |
| 1333 | else |
| 1334 | { |
| 1335 | buf = Fget_buffer (buffer); |
| 1336 | if (NILP (buf)) |
| 1337 | { |
| 1338 | buf = Fget_buffer_create (buffer); |
| 1339 | Fset_buffer_major_mode (buf); |
| 1340 | } |
| 1341 | } |
| 1342 | Fset_buffer (buf); |
| 1343 | if (NILP (norecord)) |
| 1344 | record_buffer (buf); |
| 1345 | Fselect_window (Fdisplay_buffer (buf, other_window)); |
| 1346 | return buf; |
| 1347 | } |
| 1348 | |
| 1349 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
| 1350 | "Return the current buffer as a Lisp object.") |
| 1351 | () |
| 1352 | { |
| 1353 | register Lisp_Object buf; |
| 1354 | XSETBUFFER (buf, current_buffer); |
| 1355 | return buf; |
| 1356 | } |
| 1357 | \f |
| 1358 | /* Set the current buffer to B. */ |
| 1359 | |
| 1360 | void |
| 1361 | set_buffer_internal (b) |
| 1362 | register struct buffer *b; |
| 1363 | { |
| 1364 | register struct buffer *old_buf; |
| 1365 | register Lisp_Object tail, valcontents; |
| 1366 | Lisp_Object tem; |
| 1367 | |
| 1368 | if (current_buffer == b) |
| 1369 | return; |
| 1370 | |
| 1371 | windows_or_buffers_changed = 1; |
| 1372 | set_buffer_internal_1 (b); |
| 1373 | } |
| 1374 | |
| 1375 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. |
| 1376 | This is used by redisplay. */ |
| 1377 | |
| 1378 | void |
| 1379 | set_buffer_internal_1 (b) |
| 1380 | register struct buffer *b; |
| 1381 | { |
| 1382 | register struct buffer *old_buf; |
| 1383 | register Lisp_Object tail, valcontents; |
| 1384 | Lisp_Object tem; |
| 1385 | |
| 1386 | if (current_buffer == b) |
| 1387 | return; |
| 1388 | |
| 1389 | old_buf = current_buffer; |
| 1390 | current_buffer = b; |
| 1391 | last_known_column_point = -1; /* invalidate indentation cache */ |
| 1392 | |
| 1393 | if (old_buf) |
| 1394 | { |
| 1395 | /* Put the undo list back in the base buffer, so that it appears |
| 1396 | that an indirect buffer shares the undo list of its base. */ |
| 1397 | if (old_buf->base_buffer) |
| 1398 | old_buf->base_buffer->undo_list = old_buf->undo_list; |
| 1399 | |
| 1400 | /* If the old current buffer has markers to record PT, BEGV and ZV |
| 1401 | when it is not current, update them now. */ |
| 1402 | if (! NILP (old_buf->pt_marker)) |
| 1403 | { |
| 1404 | Lisp_Object obuf; |
| 1405 | XSETBUFFER (obuf, old_buf); |
| 1406 | Fset_marker (old_buf->pt_marker, make_number (BUF_PT (old_buf)), |
| 1407 | obuf); |
| 1408 | } |
| 1409 | if (! NILP (old_buf->begv_marker)) |
| 1410 | { |
| 1411 | Lisp_Object obuf; |
| 1412 | XSETBUFFER (obuf, old_buf); |
| 1413 | Fset_marker (old_buf->begv_marker, make_number (BUF_BEGV (old_buf)), |
| 1414 | obuf); |
| 1415 | } |
| 1416 | if (! NILP (old_buf->zv_marker)) |
| 1417 | { |
| 1418 | Lisp_Object obuf; |
| 1419 | XSETBUFFER (obuf, old_buf); |
| 1420 | Fset_marker (old_buf->zv_marker, make_number (BUF_ZV (old_buf)), |
| 1421 | obuf); |
| 1422 | } |
| 1423 | } |
| 1424 | |
| 1425 | /* Get the undo list from the base buffer, so that it appears |
| 1426 | that an indirect buffer shares the undo list of its base. */ |
| 1427 | if (b->base_buffer) |
| 1428 | b->undo_list = b->base_buffer->undo_list; |
| 1429 | |
| 1430 | /* If the new current buffer has markers to record PT, BEGV and ZV |
| 1431 | when it is not current, fetch them now. */ |
| 1432 | if (! NILP (b->pt_marker)) |
| 1433 | BUF_PT (b) = marker_position (b->pt_marker); |
| 1434 | if (! NILP (b->begv_marker)) |
| 1435 | BUF_BEGV (b) = marker_position (b->begv_marker); |
| 1436 | if (! NILP (b->zv_marker)) |
| 1437 | BUF_ZV (b) = marker_position (b->zv_marker); |
| 1438 | |
| 1439 | /* Look down buffer's list of local Lisp variables |
| 1440 | to find and update any that forward into C variables. */ |
| 1441 | |
| 1442 | for (tail = b->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
| 1443 | { |
| 1444 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; |
| 1445 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
| 1446 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) |
| 1447 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
| 1448 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
| 1449 | /* Just reference the variable |
| 1450 | to cause it to become set for this buffer. */ |
| 1451 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); |
| 1452 | } |
| 1453 | |
| 1454 | /* Do the same with any others that were local to the previous buffer */ |
| 1455 | |
| 1456 | if (old_buf) |
| 1457 | for (tail = old_buf->local_var_alist; !NILP (tail); tail = XCONS (tail)->cdr) |
| 1458 | { |
| 1459 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; |
| 1460 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
| 1461 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) |
| 1462 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->car, |
| 1463 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
| 1464 | /* Just reference the variable |
| 1465 | to cause it to become set for this buffer. */ |
| 1466 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | /* Switch to buffer B temporarily for redisplay purposes. |
| 1471 | This avoids certain things that don't need to be done within redisplay. */ |
| 1472 | |
| 1473 | void |
| 1474 | set_buffer_temp (b) |
| 1475 | struct buffer *b; |
| 1476 | { |
| 1477 | register struct buffer *old_buf; |
| 1478 | |
| 1479 | if (current_buffer == b) |
| 1480 | return; |
| 1481 | |
| 1482 | old_buf = current_buffer; |
| 1483 | current_buffer = b; |
| 1484 | |
| 1485 | if (old_buf) |
| 1486 | { |
| 1487 | /* If the old current buffer has markers to record PT, BEGV and ZV |
| 1488 | when it is not current, update them now. */ |
| 1489 | if (! NILP (old_buf->pt_marker)) |
| 1490 | { |
| 1491 | Lisp_Object obuf; |
| 1492 | XSETBUFFER (obuf, old_buf); |
| 1493 | Fset_marker (old_buf->pt_marker, make_number (BUF_PT (old_buf)), |
| 1494 | obuf); |
| 1495 | } |
| 1496 | if (! NILP (old_buf->begv_marker)) |
| 1497 | { |
| 1498 | Lisp_Object obuf; |
| 1499 | XSETBUFFER (obuf, old_buf); |
| 1500 | Fset_marker (old_buf->begv_marker, make_number (BUF_BEGV (old_buf)), |
| 1501 | obuf); |
| 1502 | } |
| 1503 | if (! NILP (old_buf->zv_marker)) |
| 1504 | { |
| 1505 | Lisp_Object obuf; |
| 1506 | XSETBUFFER (obuf, old_buf); |
| 1507 | Fset_marker (old_buf->zv_marker, make_number (BUF_ZV (old_buf)), |
| 1508 | obuf); |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | /* If the new current buffer has markers to record PT, BEGV and ZV |
| 1513 | when it is not current, fetch them now. */ |
| 1514 | if (! NILP (b->pt_marker)) |
| 1515 | BUF_PT (b) = marker_position (b->pt_marker); |
| 1516 | if (! NILP (b->begv_marker)) |
| 1517 | BUF_BEGV (b) = marker_position (b->begv_marker); |
| 1518 | if (! NILP (b->zv_marker)) |
| 1519 | BUF_ZV (b) = marker_position (b->zv_marker); |
| 1520 | } |
| 1521 | |
| 1522 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
| 1523 | "Make the buffer BUFFER current for editing operations.\n\ |
| 1524 | BUFFER may be a buffer or the name of an existing buffer.\n\ |
| 1525 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ |
| 1526 | This function does not display the buffer, so its effect ends\n\ |
| 1527 | when the current command terminates.\n\ |
| 1528 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") |
| 1529 | (buffer) |
| 1530 | register Lisp_Object buffer; |
| 1531 | { |
| 1532 | register Lisp_Object buf; |
| 1533 | buf = Fget_buffer (buffer); |
| 1534 | if (NILP (buf)) |
| 1535 | nsberror (buffer); |
| 1536 | if (NILP (XBUFFER (buf)->name)) |
| 1537 | error ("Selecting deleted buffer"); |
| 1538 | set_buffer_internal (XBUFFER (buf)); |
| 1539 | return buf; |
| 1540 | } |
| 1541 | \f |
| 1542 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
| 1543 | Sbarf_if_buffer_read_only, 0, 0, 0, |
| 1544 | "Signal a `buffer-read-only' error if the current buffer is read-only.") |
| 1545 | () |
| 1546 | { |
| 1547 | if (!NILP (current_buffer->read_only) |
| 1548 | && NILP (Vinhibit_read_only)) |
| 1549 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
| 1550 | return Qnil; |
| 1551 | } |
| 1552 | |
| 1553 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", |
| 1554 | "Put BUFFER at the end of the list of all buffers.\n\ |
| 1555 | There it is the least likely candidate for `other-buffer' to return;\n\ |
| 1556 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.\n\ |
| 1557 | If BUFFER is nil or omitted, bury the current buffer.\n\ |
| 1558 | Also, if BUFFER is nil or omitted, remove the current buffer from the\n\ |
| 1559 | selected window if it is displayed there.") |
| 1560 | (buffer) |
| 1561 | register Lisp_Object buffer; |
| 1562 | { |
| 1563 | /* Figure out what buffer we're going to bury. */ |
| 1564 | if (NILP (buffer)) |
| 1565 | { |
| 1566 | XSETBUFFER (buffer, current_buffer); |
| 1567 | |
| 1568 | /* If we're burying the current buffer, unshow it. */ |
| 1569 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil), Qnil); |
| 1570 | } |
| 1571 | else |
| 1572 | { |
| 1573 | Lisp_Object buf1; |
| 1574 | |
| 1575 | buf1 = Fget_buffer (buffer); |
| 1576 | if (NILP (buf1)) |
| 1577 | nsberror (buffer); |
| 1578 | buffer = buf1; |
| 1579 | } |
| 1580 | |
| 1581 | /* Move buffer to the end of the buffer list. */ |
| 1582 | { |
| 1583 | register Lisp_Object aelt, link; |
| 1584 | |
| 1585 | aelt = Frassq (buffer, Vbuffer_alist); |
| 1586 | link = Fmemq (aelt, Vbuffer_alist); |
| 1587 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
| 1588 | XCONS (link)->cdr = Qnil; |
| 1589 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
| 1590 | } |
| 1591 | |
| 1592 | frames_bury_buffer (buffer); |
| 1593 | |
| 1594 | return Qnil; |
| 1595 | } |
| 1596 | \f |
| 1597 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
| 1598 | "Delete the entire contents of the current buffer.\n\ |
| 1599 | Any narrowing restriction in effect (see `narrow-to-region') is removed,\n\ |
| 1600 | so the buffer is truly empty after this.") |
| 1601 | () |
| 1602 | { |
| 1603 | Fwiden (); |
| 1604 | del_range (BEG, Z); |
| 1605 | current_buffer->last_window_start = 1; |
| 1606 | /* Prevent warnings, or suspension of auto saving, that would happen |
| 1607 | if future size is less than past size. Use of erase-buffer |
| 1608 | implies that the future text is not really related to the past text. */ |
| 1609 | XSETFASTINT (current_buffer->save_length, 0); |
| 1610 | return Qnil; |
| 1611 | } |
| 1612 | |
| 1613 | validate_region (b, e) |
| 1614 | register Lisp_Object *b, *e; |
| 1615 | { |
| 1616 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
| 1617 | CHECK_NUMBER_COERCE_MARKER (*e, 1); |
| 1618 | |
| 1619 | if (XINT (*b) > XINT (*e)) |
| 1620 | { |
| 1621 | Lisp_Object tem; |
| 1622 | tem = *b; *b = *e; *e = tem; |
| 1623 | } |
| 1624 | |
| 1625 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) |
| 1626 | && XINT (*e) <= ZV)) |
| 1627 | args_out_of_range (*b, *e); |
| 1628 | } |
| 1629 | \f |
| 1630 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
| 1631 | 0, 0, 0, |
| 1632 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ |
| 1633 | Most local variable bindings are eliminated so that the default values\n\ |
| 1634 | become effective once more. Also, the syntax table is set from\n\ |
| 1635 | `standard-syntax-table', the local keymap is set to nil,\n\ |
| 1636 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ |
| 1637 | This function also forces redisplay of the mode line.\n\ |
| 1638 | \n\ |
| 1639 | Every function to select a new major mode starts by\n\ |
| 1640 | calling this function.\n\n\ |
| 1641 | As a special exception, local variables whose names have\n\ |
| 1642 | a non-nil `permanent-local' property are not eliminated by this function.\n\ |
| 1643 | \n\ |
| 1644 | The first thing this function does is run\n\ |
| 1645 | the normal hook `change-major-mode-hook'.") |
| 1646 | () |
| 1647 | { |
| 1648 | register Lisp_Object alist, sym, tem; |
| 1649 | Lisp_Object oalist; |
| 1650 | |
| 1651 | if (!NILP (Vrun_hooks)) |
| 1652 | call1 (Vrun_hooks, intern ("change-major-mode-hook")); |
| 1653 | oalist = current_buffer->local_var_alist; |
| 1654 | |
| 1655 | /* Make sure none of the bindings in oalist |
| 1656 | remain swapped in, in their symbols. */ |
| 1657 | |
| 1658 | swap_out_buffer_local_variables (current_buffer); |
| 1659 | |
| 1660 | /* Actually eliminate all local bindings of this buffer. */ |
| 1661 | |
| 1662 | reset_buffer_local_variables (current_buffer, 0); |
| 1663 | |
| 1664 | /* Redisplay mode lines; we are changing major mode. */ |
| 1665 | |
| 1666 | update_mode_lines++; |
| 1667 | |
| 1668 | /* Any which are supposed to be permanent, |
| 1669 | make local again, with the same values they had. */ |
| 1670 | |
| 1671 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
| 1672 | { |
| 1673 | sym = XCONS (XCONS (alist)->car)->car; |
| 1674 | tem = Fget (sym, Qpermanent_local); |
| 1675 | if (! NILP (tem)) |
| 1676 | { |
| 1677 | Fmake_local_variable (sym); |
| 1678 | Fset (sym, XCONS (XCONS (alist)->car)->cdr); |
| 1679 | } |
| 1680 | } |
| 1681 | |
| 1682 | /* Force mode-line redisplay. Useful here because all major mode |
| 1683 | commands call this function. */ |
| 1684 | update_mode_lines++; |
| 1685 | |
| 1686 | return Qnil; |
| 1687 | } |
| 1688 | |
| 1689 | /* Make sure no local variables remain set up with buffer B |
| 1690 | for their current values. */ |
| 1691 | |
| 1692 | static void |
| 1693 | swap_out_buffer_local_variables (b) |
| 1694 | struct buffer *b; |
| 1695 | { |
| 1696 | Lisp_Object oalist, alist, sym, tem, buffer; |
| 1697 | |
| 1698 | XSETBUFFER (buffer, b); |
| 1699 | oalist = b->local_var_alist; |
| 1700 | |
| 1701 | for (alist = oalist; !NILP (alist); alist = XCONS (alist)->cdr) |
| 1702 | { |
| 1703 | sym = XCONS (XCONS (alist)->car)->car; |
| 1704 | |
| 1705 | /* Need not do anything if some other buffer's binding is now encached. */ |
| 1706 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car; |
| 1707 | if (XBUFFER (tem) == current_buffer) |
| 1708 | { |
| 1709 | /* Symbol is set up for this buffer's old local value. |
| 1710 | Set it up for the current buffer with the default value. */ |
| 1711 | |
| 1712 | tem = XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->cdr; |
| 1713 | /* Store the symbol's current value into the alist entry |
| 1714 | it is currently set up for. This is so that, if the |
| 1715 | local is marked permanent, and we make it local again |
| 1716 | later in Fkill_all_local_variables, we don't lose the value. */ |
| 1717 | XCONS (XCONS (tem)->car)->cdr |
| 1718 | = do_symval_forwarding (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car); |
| 1719 | /* Switch to the symbol's default-value alist entry. */ |
| 1720 | XCONS (tem)->car = tem; |
| 1721 | /* Mark it as current for buffer B. */ |
| 1722 | XCONS (XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->cdr)->car |
| 1723 | = buffer; |
| 1724 | /* Store the current value into any forwarding in the symbol. */ |
| 1725 | store_symval_forwarding (sym, XBUFFER_LOCAL_VALUE (XSYMBOL (sym)->value)->car, |
| 1726 | XCONS (tem)->cdr); |
| 1727 | } |
| 1728 | } |
| 1729 | } |
| 1730 | \f |
| 1731 | /* Find all the overlays in the current buffer that contain position POS. |
| 1732 | Return the number found, and store them in a vector in *VEC_PTR. |
| 1733 | Store in *LEN_PTR the size allocated for the vector. |
| 1734 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
| 1735 | or ZV if there are no more overlays. |
| 1736 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
| 1737 | or BEGV if there are no previous overlays. |
| 1738 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
| 1739 | |
| 1740 | *VEC_PTR and *LEN_PTR should contain a valid vector and size |
| 1741 | when this function is called. |
| 1742 | |
| 1743 | If EXTEND is non-zero, we make the vector bigger if necessary. |
| 1744 | If EXTEND is zero, we never extend the vector, |
| 1745 | and we store only as many overlays as will fit. |
| 1746 | But we still return the total number of overlays. */ |
| 1747 | |
| 1748 | int |
| 1749 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
| 1750 | int pos; |
| 1751 | int extend; |
| 1752 | Lisp_Object **vec_ptr; |
| 1753 | int *len_ptr; |
| 1754 | int *next_ptr; |
| 1755 | int *prev_ptr; |
| 1756 | { |
| 1757 | Lisp_Object tail, overlay, start, end, result; |
| 1758 | int idx = 0; |
| 1759 | int len = *len_ptr; |
| 1760 | Lisp_Object *vec = *vec_ptr; |
| 1761 | int next = ZV; |
| 1762 | int prev = BEGV; |
| 1763 | int inhibit_storing = 0; |
| 1764 | |
| 1765 | for (tail = current_buffer->overlays_before; |
| 1766 | GC_CONSP (tail); |
| 1767 | tail = XCONS (tail)->cdr) |
| 1768 | { |
| 1769 | int startpos, endpos; |
| 1770 | |
| 1771 | overlay = XCONS (tail)->car; |
| 1772 | |
| 1773 | start = OVERLAY_START (overlay); |
| 1774 | end = OVERLAY_END (overlay); |
| 1775 | endpos = OVERLAY_POSITION (end); |
| 1776 | if (endpos < pos) |
| 1777 | { |
| 1778 | if (prev < endpos) |
| 1779 | prev = endpos; |
| 1780 | break; |
| 1781 | } |
| 1782 | if (endpos == pos) |
| 1783 | continue; |
| 1784 | startpos = OVERLAY_POSITION (start); |
| 1785 | if (startpos <= pos) |
| 1786 | { |
| 1787 | if (idx == len) |
| 1788 | { |
| 1789 | /* The supplied vector is full. |
| 1790 | Either make it bigger, or don't store any more in it. */ |
| 1791 | if (extend) |
| 1792 | { |
| 1793 | *len_ptr = len *= 2; |
| 1794 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
| 1795 | *vec_ptr = vec; |
| 1796 | } |
| 1797 | else |
| 1798 | inhibit_storing = 1; |
| 1799 | } |
| 1800 | |
| 1801 | if (!inhibit_storing) |
| 1802 | vec[idx] = overlay; |
| 1803 | /* Keep counting overlays even if we can't return them all. */ |
| 1804 | idx++; |
| 1805 | } |
| 1806 | else if (startpos < next) |
| 1807 | next = startpos; |
| 1808 | } |
| 1809 | |
| 1810 | for (tail = current_buffer->overlays_after; |
| 1811 | GC_CONSP (tail); |
| 1812 | tail = XCONS (tail)->cdr) |
| 1813 | { |
| 1814 | int startpos, endpos; |
| 1815 | |
| 1816 | overlay = XCONS (tail)->car; |
| 1817 | |
| 1818 | start = OVERLAY_START (overlay); |
| 1819 | end = OVERLAY_END (overlay); |
| 1820 | startpos = OVERLAY_POSITION (start); |
| 1821 | if (pos < startpos) |
| 1822 | { |
| 1823 | if (startpos < next) |
| 1824 | next = startpos; |
| 1825 | break; |
| 1826 | } |
| 1827 | endpos = OVERLAY_POSITION (end); |
| 1828 | if (pos < endpos) |
| 1829 | { |
| 1830 | if (idx == len) |
| 1831 | { |
| 1832 | if (extend) |
| 1833 | { |
| 1834 | *len_ptr = len *= 2; |
| 1835 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
| 1836 | *vec_ptr = vec; |
| 1837 | } |
| 1838 | else |
| 1839 | inhibit_storing = 1; |
| 1840 | } |
| 1841 | |
| 1842 | if (!inhibit_storing) |
| 1843 | vec[idx] = overlay; |
| 1844 | idx++; |
| 1845 | } |
| 1846 | else if (endpos < pos && endpos > prev) |
| 1847 | prev = endpos; |
| 1848 | } |
| 1849 | |
| 1850 | if (next_ptr) |
| 1851 | *next_ptr = next; |
| 1852 | if (prev_ptr) |
| 1853 | *prev_ptr = prev; |
| 1854 | return idx; |
| 1855 | } |
| 1856 | \f |
| 1857 | /* Find all the overlays in the current buffer that overlap the range BEG-END |
| 1858 | or are empty at BEG. |
| 1859 | |
| 1860 | Return the number found, and store them in a vector in *VEC_PTR. |
| 1861 | Store in *LEN_PTR the size allocated for the vector. |
| 1862 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
| 1863 | or ZV if there are no more overlays. |
| 1864 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
| 1865 | or BEGV if there are no previous overlays. |
| 1866 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
| 1867 | |
| 1868 | *VEC_PTR and *LEN_PTR should contain a valid vector and size |
| 1869 | when this function is called. |
| 1870 | |
| 1871 | If EXTEND is non-zero, we make the vector bigger if necessary. |
| 1872 | If EXTEND is zero, we never extend the vector, |
| 1873 | and we store only as many overlays as will fit. |
| 1874 | But we still return the total number of overlays. */ |
| 1875 | |
| 1876 | int |
| 1877 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
| 1878 | int beg, end; |
| 1879 | int extend; |
| 1880 | Lisp_Object **vec_ptr; |
| 1881 | int *len_ptr; |
| 1882 | int *next_ptr; |
| 1883 | int *prev_ptr; |
| 1884 | { |
| 1885 | Lisp_Object tail, overlay, ostart, oend, result; |
| 1886 | int idx = 0; |
| 1887 | int len = *len_ptr; |
| 1888 | Lisp_Object *vec = *vec_ptr; |
| 1889 | int next = ZV; |
| 1890 | int prev = BEGV; |
| 1891 | int inhibit_storing = 0; |
| 1892 | |
| 1893 | for (tail = current_buffer->overlays_before; |
| 1894 | GC_CONSP (tail); |
| 1895 | tail = XCONS (tail)->cdr) |
| 1896 | { |
| 1897 | int startpos, endpos; |
| 1898 | |
| 1899 | overlay = XCONS (tail)->car; |
| 1900 | |
| 1901 | ostart = OVERLAY_START (overlay); |
| 1902 | oend = OVERLAY_END (overlay); |
| 1903 | endpos = OVERLAY_POSITION (oend); |
| 1904 | if (endpos < beg) |
| 1905 | { |
| 1906 | if (prev < endpos) |
| 1907 | prev = endpos; |
| 1908 | break; |
| 1909 | } |
| 1910 | startpos = OVERLAY_POSITION (ostart); |
| 1911 | /* Count an interval if it either overlaps the range |
| 1912 | or is empty at the start of the range. */ |
| 1913 | if ((beg < endpos && startpos < end) |
| 1914 | || (startpos == endpos && beg == endpos)) |
| 1915 | { |
| 1916 | if (idx == len) |
| 1917 | { |
| 1918 | /* The supplied vector is full. |
| 1919 | Either make it bigger, or don't store any more in it. */ |
| 1920 | if (extend) |
| 1921 | { |
| 1922 | *len_ptr = len *= 2; |
| 1923 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
| 1924 | *vec_ptr = vec; |
| 1925 | } |
| 1926 | else |
| 1927 | inhibit_storing = 1; |
| 1928 | } |
| 1929 | |
| 1930 | if (!inhibit_storing) |
| 1931 | vec[idx] = overlay; |
| 1932 | /* Keep counting overlays even if we can't return them all. */ |
| 1933 | idx++; |
| 1934 | } |
| 1935 | else if (startpos < next) |
| 1936 | next = startpos; |
| 1937 | } |
| 1938 | |
| 1939 | for (tail = current_buffer->overlays_after; |
| 1940 | GC_CONSP (tail); |
| 1941 | tail = XCONS (tail)->cdr) |
| 1942 | { |
| 1943 | int startpos, endpos; |
| 1944 | |
| 1945 | overlay = XCONS (tail)->car; |
| 1946 | |
| 1947 | ostart = OVERLAY_START (overlay); |
| 1948 | oend = OVERLAY_END (overlay); |
| 1949 | startpos = OVERLAY_POSITION (ostart); |
| 1950 | if (end < startpos) |
| 1951 | { |
| 1952 | if (startpos < next) |
| 1953 | next = startpos; |
| 1954 | break; |
| 1955 | } |
| 1956 | endpos = OVERLAY_POSITION (oend); |
| 1957 | /* Count an interval if it either overlaps the range |
| 1958 | or is empty at the start of the range. */ |
| 1959 | if ((beg < endpos && startpos < end) |
| 1960 | || (startpos == endpos && beg == endpos)) |
| 1961 | { |
| 1962 | if (idx == len) |
| 1963 | { |
| 1964 | if (extend) |
| 1965 | { |
| 1966 | *len_ptr = len *= 2; |
| 1967 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
| 1968 | *vec_ptr = vec; |
| 1969 | } |
| 1970 | else |
| 1971 | inhibit_storing = 1; |
| 1972 | } |
| 1973 | |
| 1974 | if (!inhibit_storing) |
| 1975 | vec[idx] = overlay; |
| 1976 | idx++; |
| 1977 | } |
| 1978 | else if (endpos < beg && endpos > prev) |
| 1979 | prev = endpos; |
| 1980 | } |
| 1981 | |
| 1982 | if (next_ptr) |
| 1983 | *next_ptr = next; |
| 1984 | if (prev_ptr) |
| 1985 | *prev_ptr = prev; |
| 1986 | return idx; |
| 1987 | } |
| 1988 | \f |
| 1989 | /* Fast function to just test if we're at an overlay boundary. */ |
| 1990 | int |
| 1991 | overlay_touches_p (pos) |
| 1992 | int pos; |
| 1993 | { |
| 1994 | Lisp_Object tail, overlay; |
| 1995 | |
| 1996 | for (tail = current_buffer->overlays_before; GC_CONSP (tail); |
| 1997 | tail = XCONS (tail)->cdr) |
| 1998 | { |
| 1999 | int endpos; |
| 2000 | |
| 2001 | overlay = XCONS (tail)->car; |
| 2002 | if (!GC_OVERLAYP (overlay)) |
| 2003 | abort (); |
| 2004 | |
| 2005 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2006 | if (endpos < pos) |
| 2007 | break; |
| 2008 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) |
| 2009 | return 1; |
| 2010 | } |
| 2011 | |
| 2012 | for (tail = current_buffer->overlays_after; GC_CONSP (tail); |
| 2013 | tail = XCONS (tail)->cdr) |
| 2014 | { |
| 2015 | int startpos; |
| 2016 | |
| 2017 | overlay = XCONS (tail)->car; |
| 2018 | if (!GC_OVERLAYP (overlay)) |
| 2019 | abort (); |
| 2020 | |
| 2021 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2022 | if (pos < startpos) |
| 2023 | break; |
| 2024 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) |
| 2025 | return 1; |
| 2026 | } |
| 2027 | return 0; |
| 2028 | } |
| 2029 | \f |
| 2030 | struct sortvec |
| 2031 | { |
| 2032 | Lisp_Object overlay; |
| 2033 | int beg, end; |
| 2034 | int priority; |
| 2035 | }; |
| 2036 | |
| 2037 | static int |
| 2038 | compare_overlays (s1, s2) |
| 2039 | struct sortvec *s1, *s2; |
| 2040 | { |
| 2041 | if (s1->priority != s2->priority) |
| 2042 | return s1->priority - s2->priority; |
| 2043 | if (s1->beg != s2->beg) |
| 2044 | return s1->beg - s2->beg; |
| 2045 | if (s1->end != s2->end) |
| 2046 | return s2->end - s1->end; |
| 2047 | return 0; |
| 2048 | } |
| 2049 | |
| 2050 | /* Sort an array of overlays by priority. The array is modified in place. |
| 2051 | The return value is the new size; this may be smaller than the original |
| 2052 | size if some of the overlays were invalid or were window-specific. */ |
| 2053 | int |
| 2054 | sort_overlays (overlay_vec, noverlays, w) |
| 2055 | Lisp_Object *overlay_vec; |
| 2056 | int noverlays; |
| 2057 | struct window *w; |
| 2058 | { |
| 2059 | int i, j; |
| 2060 | struct sortvec *sortvec; |
| 2061 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); |
| 2062 | |
| 2063 | /* Put the valid and relevant overlays into sortvec. */ |
| 2064 | |
| 2065 | for (i = 0, j = 0; i < noverlays; i++) |
| 2066 | { |
| 2067 | Lisp_Object tem; |
| 2068 | Lisp_Object overlay; |
| 2069 | |
| 2070 | overlay = overlay_vec[i]; |
| 2071 | if (OVERLAY_VALID (overlay) |
| 2072 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 |
| 2073 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) |
| 2074 | { |
| 2075 | /* If we're interested in a specific window, then ignore |
| 2076 | overlays that are limited to some other window. */ |
| 2077 | if (w) |
| 2078 | { |
| 2079 | Lisp_Object window; |
| 2080 | |
| 2081 | window = Foverlay_get (overlay, Qwindow); |
| 2082 | if (WINDOWP (window) && XWINDOW (window) != w) |
| 2083 | continue; |
| 2084 | } |
| 2085 | |
| 2086 | /* This overlay is good and counts: put it into sortvec. */ |
| 2087 | sortvec[j].overlay = overlay; |
| 2088 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2089 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2090 | tem = Foverlay_get (overlay, Qpriority); |
| 2091 | if (INTEGERP (tem)) |
| 2092 | sortvec[j].priority = XINT (tem); |
| 2093 | else |
| 2094 | sortvec[j].priority = 0; |
| 2095 | j++; |
| 2096 | } |
| 2097 | } |
| 2098 | noverlays = j; |
| 2099 | |
| 2100 | /* Sort the overlays into the proper order: increasing priority. */ |
| 2101 | |
| 2102 | if (noverlays > 1) |
| 2103 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); |
| 2104 | |
| 2105 | for (i = 0; i < noverlays; i++) |
| 2106 | overlay_vec[i] = sortvec[i].overlay; |
| 2107 | return (noverlays); |
| 2108 | } |
| 2109 | \f |
| 2110 | struct sortstr |
| 2111 | { |
| 2112 | Lisp_Object string, string2; |
| 2113 | int size; |
| 2114 | int priority; |
| 2115 | }; |
| 2116 | |
| 2117 | struct sortstrlist |
| 2118 | { |
| 2119 | struct sortstr *buf; /* An array that expands as needed; never freed. */ |
| 2120 | int size; /* Allocated length of that array. */ |
| 2121 | int used; /* How much of the array is currently in use. */ |
| 2122 | int bytes; /* Total length of the strings in buf. */ |
| 2123 | }; |
| 2124 | |
| 2125 | /* Buffers for storing information about the overlays touching a given |
| 2126 | position. These could be automatic variables in overlay_strings, but |
| 2127 | it's more efficient to hold onto the memory instead of repeatedly |
| 2128 | allocating and freeing it. */ |
| 2129 | static struct sortstrlist overlay_heads, overlay_tails; |
| 2130 | static unsigned char *overlay_str_buf; |
| 2131 | |
| 2132 | /* Allocated length of overlay_str_buf. */ |
| 2133 | static int overlay_str_len; |
| 2134 | |
| 2135 | /* A comparison function suitable for passing to qsort. */ |
| 2136 | static int |
| 2137 | cmp_for_strings (as1, as2) |
| 2138 | char *as1, *as2; |
| 2139 | { |
| 2140 | struct sortstr *s1 = (struct sortstr *)as1; |
| 2141 | struct sortstr *s2 = (struct sortstr *)as2; |
| 2142 | if (s1->size != s2->size) |
| 2143 | return s2->size - s1->size; |
| 2144 | if (s1->priority != s2->priority) |
| 2145 | return s1->priority - s2->priority; |
| 2146 | return 0; |
| 2147 | } |
| 2148 | |
| 2149 | static void |
| 2150 | record_overlay_string (ssl, str, str2, pri, size) |
| 2151 | struct sortstrlist *ssl; |
| 2152 | Lisp_Object str, str2, pri; |
| 2153 | int size; |
| 2154 | { |
| 2155 | if (ssl->used == ssl->size) |
| 2156 | { |
| 2157 | if (ssl->buf) |
| 2158 | ssl->size *= 2; |
| 2159 | else |
| 2160 | ssl->size = 5; |
| 2161 | ssl->buf = ((struct sortstr *) |
| 2162 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); |
| 2163 | } |
| 2164 | ssl->buf[ssl->used].string = str; |
| 2165 | ssl->buf[ssl->used].string2 = str2; |
| 2166 | ssl->buf[ssl->used].size = size; |
| 2167 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); |
| 2168 | ssl->used++; |
| 2169 | ssl->bytes += XSTRING (str)->size; |
| 2170 | if (STRINGP (str2)) |
| 2171 | ssl->bytes += XSTRING (str2)->size; |
| 2172 | } |
| 2173 | |
| 2174 | /* Return the concatenation of the strings associated with overlays that |
| 2175 | begin or end at POS, ignoring overlays that are specific to a window |
| 2176 | other than W. The strings are concatenated in the appropriate order: |
| 2177 | shorter overlays nest inside longer ones, and higher priority inside |
| 2178 | lower. Normally all of the after-strings come first, but zero-sized |
| 2179 | overlays have their after-strings ride along with the before-strings |
| 2180 | because it would look strange to print them inside-out. |
| 2181 | |
| 2182 | Returns the string length, and stores the contents indirectly through |
| 2183 | PSTR, if that variable is non-null. The string may be overwritten by |
| 2184 | subsequent calls. */ |
| 2185 | |
| 2186 | int |
| 2187 | overlay_strings (pos, w, pstr) |
| 2188 | int pos; |
| 2189 | struct window *w; |
| 2190 | unsigned char **pstr; |
| 2191 | { |
| 2192 | Lisp_Object ov, overlay, window, str; |
| 2193 | int startpos, endpos; |
| 2194 | |
| 2195 | overlay_heads.used = overlay_heads.bytes = 0; |
| 2196 | overlay_tails.used = overlay_tails.bytes = 0; |
| 2197 | for (ov = current_buffer->overlays_before; CONSP (ov); ov = XCONS (ov)->cdr) |
| 2198 | { |
| 2199 | overlay = XCONS (ov)->car; |
| 2200 | if (!OVERLAYP (overlay)) |
| 2201 | abort (); |
| 2202 | |
| 2203 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2204 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2205 | if (endpos < pos) |
| 2206 | break; |
| 2207 | if (endpos != pos && startpos != pos) |
| 2208 | continue; |
| 2209 | window = Foverlay_get (overlay, Qwindow); |
| 2210 | if (WINDOWP (window) && XWINDOW (window) != w) |
| 2211 | continue; |
| 2212 | if (startpos == pos |
| 2213 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) |
| 2214 | record_overlay_string (&overlay_heads, str, |
| 2215 | (startpos == endpos |
| 2216 | ? Foverlay_get (overlay, Qafter_string) |
| 2217 | : Qnil), |
| 2218 | Foverlay_get (overlay, Qpriority), |
| 2219 | endpos - startpos); |
| 2220 | else if (endpos == pos |
| 2221 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) |
| 2222 | record_overlay_string (&overlay_tails, str, Qnil, |
| 2223 | Foverlay_get (overlay, Qpriority), |
| 2224 | endpos - startpos); |
| 2225 | } |
| 2226 | for (ov = current_buffer->overlays_after; CONSP (ov); ov = XCONS (ov)->cdr) |
| 2227 | { |
| 2228 | overlay = XCONS (ov)->car; |
| 2229 | if (!OVERLAYP (overlay)) |
| 2230 | abort (); |
| 2231 | |
| 2232 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2233 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2234 | if (startpos > pos) |
| 2235 | break; |
| 2236 | if (endpos != pos && startpos != pos) |
| 2237 | continue; |
| 2238 | window = Foverlay_get (overlay, Qwindow); |
| 2239 | if (WINDOWP (window) && XWINDOW (window) != w) |
| 2240 | continue; |
| 2241 | if (startpos == pos |
| 2242 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) |
| 2243 | record_overlay_string (&overlay_heads, str, |
| 2244 | (startpos == endpos |
| 2245 | ? Foverlay_get (overlay, Qafter_string) |
| 2246 | : Qnil), |
| 2247 | Foverlay_get (overlay, Qpriority), |
| 2248 | endpos - startpos); |
| 2249 | else if (endpos == pos |
| 2250 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) |
| 2251 | record_overlay_string (&overlay_tails, str, Qnil, |
| 2252 | Foverlay_get (overlay, Qpriority), |
| 2253 | endpos - startpos); |
| 2254 | } |
| 2255 | if (overlay_tails.used > 1) |
| 2256 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), |
| 2257 | cmp_for_strings); |
| 2258 | if (overlay_heads.used > 1) |
| 2259 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), |
| 2260 | cmp_for_strings); |
| 2261 | if (overlay_heads.bytes || overlay_tails.bytes) |
| 2262 | { |
| 2263 | Lisp_Object tem; |
| 2264 | int i; |
| 2265 | unsigned char *p; |
| 2266 | int total = overlay_heads.bytes + overlay_tails.bytes; |
| 2267 | |
| 2268 | if (total > overlay_str_len) |
| 2269 | { |
| 2270 | overlay_str_len = total; |
| 2271 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, |
| 2272 | total); |
| 2273 | } |
| 2274 | p = overlay_str_buf; |
| 2275 | for (i = overlay_tails.used; --i >= 0;) |
| 2276 | { |
| 2277 | tem = overlay_tails.buf[i].string; |
| 2278 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
| 2279 | p += XSTRING (tem)->size; |
| 2280 | } |
| 2281 | for (i = 0; i < overlay_heads.used; ++i) |
| 2282 | { |
| 2283 | tem = overlay_heads.buf[i].string; |
| 2284 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
| 2285 | p += XSTRING (tem)->size; |
| 2286 | tem = overlay_heads.buf[i].string2; |
| 2287 | if (STRINGP (tem)) |
| 2288 | { |
| 2289 | bcopy (XSTRING (tem)->data, p, XSTRING (tem)->size); |
| 2290 | p += XSTRING (tem)->size; |
| 2291 | } |
| 2292 | } |
| 2293 | if (p != overlay_str_buf + total) |
| 2294 | abort (); |
| 2295 | if (pstr) |
| 2296 | *pstr = overlay_str_buf; |
| 2297 | return total; |
| 2298 | } |
| 2299 | return 0; |
| 2300 | } |
| 2301 | \f |
| 2302 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
| 2303 | |
| 2304 | void |
| 2305 | recenter_overlay_lists (buf, pos) |
| 2306 | struct buffer *buf; |
| 2307 | int pos; |
| 2308 | { |
| 2309 | Lisp_Object overlay, tail, next, prev, beg, end; |
| 2310 | |
| 2311 | /* See if anything in overlays_before should move to overlays_after. */ |
| 2312 | |
| 2313 | /* We don't strictly need prev in this loop; it should always be nil. |
| 2314 | But we use it for symmetry and in case that should cease to be true |
| 2315 | with some future change. */ |
| 2316 | prev = Qnil; |
| 2317 | for (tail = buf->overlays_before; |
| 2318 | CONSP (tail); |
| 2319 | prev = tail, tail = next) |
| 2320 | { |
| 2321 | next = XCONS (tail)->cdr; |
| 2322 | overlay = XCONS (tail)->car; |
| 2323 | |
| 2324 | /* If the overlay is not valid, get rid of it. */ |
| 2325 | if (!OVERLAY_VALID (overlay)) |
| 2326 | #if 1 |
| 2327 | abort (); |
| 2328 | #else |
| 2329 | { |
| 2330 | /* Splice the cons cell TAIL out of overlays_before. */ |
| 2331 | if (!NILP (prev)) |
| 2332 | XCONS (prev)->cdr = next; |
| 2333 | else |
| 2334 | buf->overlays_before = next; |
| 2335 | tail = prev; |
| 2336 | continue; |
| 2337 | } |
| 2338 | #endif |
| 2339 | |
| 2340 | beg = OVERLAY_START (overlay); |
| 2341 | end = OVERLAY_END (overlay); |
| 2342 | |
| 2343 | if (OVERLAY_POSITION (end) > pos) |
| 2344 | { |
| 2345 | /* OVERLAY needs to be moved. */ |
| 2346 | int where = OVERLAY_POSITION (beg); |
| 2347 | Lisp_Object other, other_prev; |
| 2348 | |
| 2349 | /* Splice the cons cell TAIL out of overlays_before. */ |
| 2350 | if (!NILP (prev)) |
| 2351 | XCONS (prev)->cdr = next; |
| 2352 | else |
| 2353 | buf->overlays_before = next; |
| 2354 | |
| 2355 | /* Search thru overlays_after for where to put it. */ |
| 2356 | other_prev = Qnil; |
| 2357 | for (other = buf->overlays_after; |
| 2358 | CONSP (other); |
| 2359 | other_prev = other, other = XCONS (other)->cdr) |
| 2360 | { |
| 2361 | Lisp_Object otherbeg, otheroverlay, follower; |
| 2362 | int win; |
| 2363 | |
| 2364 | otheroverlay = XCONS (other)->car; |
| 2365 | if (! OVERLAY_VALID (otheroverlay)) |
| 2366 | abort (); |
| 2367 | |
| 2368 | otherbeg = OVERLAY_START (otheroverlay); |
| 2369 | if (OVERLAY_POSITION (otherbeg) >= where) |
| 2370 | break; |
| 2371 | } |
| 2372 | |
| 2373 | /* Add TAIL to overlays_after before OTHER. */ |
| 2374 | XCONS (tail)->cdr = other; |
| 2375 | if (!NILP (other_prev)) |
| 2376 | XCONS (other_prev)->cdr = tail; |
| 2377 | else |
| 2378 | buf->overlays_after = tail; |
| 2379 | tail = prev; |
| 2380 | } |
| 2381 | else |
| 2382 | /* We've reached the things that should stay in overlays_before. |
| 2383 | All the rest of overlays_before must end even earlier, |
| 2384 | so stop now. */ |
| 2385 | break; |
| 2386 | } |
| 2387 | |
| 2388 | /* See if anything in overlays_after should be in overlays_before. */ |
| 2389 | prev = Qnil; |
| 2390 | for (tail = buf->overlays_after; |
| 2391 | CONSP (tail); |
| 2392 | prev = tail, tail = next) |
| 2393 | { |
| 2394 | next = XCONS (tail)->cdr; |
| 2395 | overlay = XCONS (tail)->car; |
| 2396 | |
| 2397 | /* If the overlay is not valid, get rid of it. */ |
| 2398 | if (!OVERLAY_VALID (overlay)) |
| 2399 | #if 1 |
| 2400 | abort (); |
| 2401 | #else |
| 2402 | { |
| 2403 | /* Splice the cons cell TAIL out of overlays_after. */ |
| 2404 | if (!NILP (prev)) |
| 2405 | XCONS (prev)->cdr = next; |
| 2406 | else |
| 2407 | buf->overlays_after = next; |
| 2408 | tail = prev; |
| 2409 | continue; |
| 2410 | } |
| 2411 | #endif |
| 2412 | |
| 2413 | beg = OVERLAY_START (overlay); |
| 2414 | end = OVERLAY_END (overlay); |
| 2415 | |
| 2416 | /* Stop looking, when we know that nothing further |
| 2417 | can possibly end before POS. */ |
| 2418 | if (OVERLAY_POSITION (beg) > pos) |
| 2419 | break; |
| 2420 | |
| 2421 | if (OVERLAY_POSITION (end) <= pos) |
| 2422 | { |
| 2423 | /* OVERLAY needs to be moved. */ |
| 2424 | int where = OVERLAY_POSITION (end); |
| 2425 | Lisp_Object other, other_prev; |
| 2426 | |
| 2427 | /* Splice the cons cell TAIL out of overlays_after. */ |
| 2428 | if (!NILP (prev)) |
| 2429 | XCONS (prev)->cdr = next; |
| 2430 | else |
| 2431 | buf->overlays_after = next; |
| 2432 | |
| 2433 | /* Search thru overlays_before for where to put it. */ |
| 2434 | other_prev = Qnil; |
| 2435 | for (other = buf->overlays_before; |
| 2436 | CONSP (other); |
| 2437 | other_prev = other, other = XCONS (other)->cdr) |
| 2438 | { |
| 2439 | Lisp_Object otherend, otheroverlay; |
| 2440 | int win; |
| 2441 | |
| 2442 | otheroverlay = XCONS (other)->car; |
| 2443 | if (! OVERLAY_VALID (otheroverlay)) |
| 2444 | abort (); |
| 2445 | |
| 2446 | otherend = OVERLAY_END (otheroverlay); |
| 2447 | if (OVERLAY_POSITION (otherend) <= where) |
| 2448 | break; |
| 2449 | } |
| 2450 | |
| 2451 | /* Add TAIL to overlays_before before OTHER. */ |
| 2452 | XCONS (tail)->cdr = other; |
| 2453 | if (!NILP (other_prev)) |
| 2454 | XCONS (other_prev)->cdr = tail; |
| 2455 | else |
| 2456 | buf->overlays_before = tail; |
| 2457 | tail = prev; |
| 2458 | } |
| 2459 | } |
| 2460 | |
| 2461 | XSETFASTINT (buf->overlay_center, pos); |
| 2462 | } |
| 2463 | |
| 2464 | void |
| 2465 | adjust_overlays_for_insert (pos, length) |
| 2466 | int pos; |
| 2467 | int length; |
| 2468 | { |
| 2469 | /* After an insertion, the lists are still sorted properly, |
| 2470 | but we may need to update the value of the overlay center. */ |
| 2471 | if (XFASTINT (current_buffer->overlay_center) >= pos) |
| 2472 | XSETFASTINT (current_buffer->overlay_center, |
| 2473 | XFASTINT (current_buffer->overlay_center) + length); |
| 2474 | } |
| 2475 | |
| 2476 | void |
| 2477 | adjust_overlays_for_delete (pos, length) |
| 2478 | int pos; |
| 2479 | int length; |
| 2480 | { |
| 2481 | if (XFASTINT (current_buffer->overlay_center) < pos) |
| 2482 | /* The deletion was to our right. No change needed; the before- and |
| 2483 | after-lists are still consistent. */ |
| 2484 | ; |
| 2485 | else if (XFASTINT (current_buffer->overlay_center) > pos + length) |
| 2486 | /* The deletion was to our left. We need to adjust the center value |
| 2487 | to account for the change in position, but the lists are consistent |
| 2488 | given the new value. */ |
| 2489 | XSETFASTINT (current_buffer->overlay_center, |
| 2490 | XFASTINT (current_buffer->overlay_center) - length); |
| 2491 | else |
| 2492 | /* We're right in the middle. There might be things on the after-list |
| 2493 | that now belong on the before-list. Recentering will move them, |
| 2494 | and also update the center point. */ |
| 2495 | recenter_overlay_lists (current_buffer, pos); |
| 2496 | } |
| 2497 | |
| 2498 | /* Fix up overlays that were garbled as a result of permuting markers |
| 2499 | in the range START through END. Any overlay with at least one |
| 2500 | endpoint in this range will need to be unlinked from the overlay |
| 2501 | list and reinserted in its proper place. |
| 2502 | Such an overlay might even have negative size at this point. |
| 2503 | If so, we'll reverse the endpoints. Can you think of anything |
| 2504 | better to do in this situation? */ |
| 2505 | void |
| 2506 | fix_overlays_in_range (start, end) |
| 2507 | register int start, end; |
| 2508 | { |
| 2509 | Lisp_Object tem, overlay; |
| 2510 | Lisp_Object before_list, after_list; |
| 2511 | Lisp_Object *ptail, *pbefore = &before_list, *pafter = &after_list; |
| 2512 | int startpos, endpos; |
| 2513 | |
| 2514 | /* This algorithm shifts links around instead of consing and GCing. |
| 2515 | The loop invariant is that before_list (resp. after_list) is a |
| 2516 | well-formed list except that its last element, the one that |
| 2517 | *pbefore (resp. *pafter) points to, is still uninitialized. |
| 2518 | So it's not a bug that before_list isn't initialized, although |
| 2519 | it may look strange. */ |
| 2520 | for (ptail = ¤t_buffer->overlays_before; CONSP (*ptail);) |
| 2521 | { |
| 2522 | overlay = XCONS (*ptail)->car; |
| 2523 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2524 | if (endpos < start) |
| 2525 | break; |
| 2526 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2527 | if (endpos < end |
| 2528 | || (startpos >= start && startpos < end)) |
| 2529 | { |
| 2530 | /* If the overlay is backwards, fix that now. */ |
| 2531 | if (startpos > endpos) |
| 2532 | { |
| 2533 | int tem; |
| 2534 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
| 2535 | Qnil); |
| 2536 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), |
| 2537 | Qnil); |
| 2538 | tem = startpos; startpos = endpos; endpos = tem; |
| 2539 | } |
| 2540 | /* Add it to the end of the wrong list. Later on, |
| 2541 | recenter_overlay_lists will move it to the right place. */ |
| 2542 | if (endpos < XINT (current_buffer->overlay_center)) |
| 2543 | { |
| 2544 | *pafter = *ptail; |
| 2545 | pafter = &XCONS (*ptail)->cdr; |
| 2546 | } |
| 2547 | else |
| 2548 | { |
| 2549 | *pbefore = *ptail; |
| 2550 | pbefore = &XCONS (*ptail)->cdr; |
| 2551 | } |
| 2552 | *ptail = XCONS (*ptail)->cdr; |
| 2553 | } |
| 2554 | else |
| 2555 | ptail = &XCONS (*ptail)->cdr; |
| 2556 | } |
| 2557 | for (ptail = ¤t_buffer->overlays_after; CONSP (*ptail);) |
| 2558 | { |
| 2559 | overlay = XCONS (*ptail)->car; |
| 2560 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2561 | if (startpos >= end) |
| 2562 | break; |
| 2563 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2564 | if (startpos >= start |
| 2565 | || (endpos >= start && endpos < end)) |
| 2566 | { |
| 2567 | if (startpos > endpos) |
| 2568 | { |
| 2569 | int tem; |
| 2570 | Fset_marker (OVERLAY_START (overlay), make_number (endpos), |
| 2571 | Qnil); |
| 2572 | Fset_marker (OVERLAY_END (overlay), make_number (startpos), |
| 2573 | Qnil); |
| 2574 | tem = startpos; startpos = endpos; endpos = tem; |
| 2575 | } |
| 2576 | if (endpos < XINT (current_buffer->overlay_center)) |
| 2577 | { |
| 2578 | *pafter = *ptail; |
| 2579 | pafter = &XCONS (*ptail)->cdr; |
| 2580 | } |
| 2581 | else |
| 2582 | { |
| 2583 | *pbefore = *ptail; |
| 2584 | pbefore = &XCONS (*ptail)->cdr; |
| 2585 | } |
| 2586 | *ptail = XCONS (*ptail)->cdr; |
| 2587 | } |
| 2588 | else |
| 2589 | ptail = &XCONS (*ptail)->cdr; |
| 2590 | } |
| 2591 | |
| 2592 | /* Splice the constructed (wrong) lists into the buffer's lists, |
| 2593 | and let the recenter function make it sane again. */ |
| 2594 | *pbefore = current_buffer->overlays_before; |
| 2595 | current_buffer->overlays_before = before_list; |
| 2596 | recenter_overlay_lists (current_buffer, |
| 2597 | XINT (current_buffer->overlay_center)); |
| 2598 | |
| 2599 | *pafter = current_buffer->overlays_after; |
| 2600 | current_buffer->overlays_after = after_list; |
| 2601 | recenter_overlay_lists (current_buffer, |
| 2602 | XINT (current_buffer->overlay_center)); |
| 2603 | } |
| 2604 | |
| 2605 | /* We have two types of overlay: the one whose ending marker is |
| 2606 | after-insertion-marker (this is the usual case) and the one whose |
| 2607 | ending marker is before-insertion-marker. When `overlays_before' |
| 2608 | contains overlays of the latter type and the former type in this |
| 2609 | order and both overlays end at inserting position, inserting a text |
| 2610 | increases only the ending marker of the latter type, which results |
| 2611 | in incorrect ordering of `overlays_before'. |
| 2612 | |
| 2613 | This function fixes ordering of overlays in the slot |
| 2614 | `overlays_before' of the buffer *BP. Before the insertion, `point' |
| 2615 | was at PREV, and now is at POS. */ |
| 2616 | |
| 2617 | fix_overlays_before (bp, prev, pos) |
| 2618 | struct buffer *bp; |
| 2619 | int prev, pos; |
| 2620 | { |
| 2621 | Lisp_Object *tailp = &bp->overlays_before; |
| 2622 | Lisp_Object *right_place; |
| 2623 | int end; |
| 2624 | |
| 2625 | /* After the insertion, the several overlays may be in incorrect |
| 2626 | order. The possibility is that, in the list `overlays_before', |
| 2627 | an overlay which ends at POS appears after an overlay which ends |
| 2628 | at PREV. Since POS is greater than PREV, we must fix the |
| 2629 | ordering of these overlays, by moving overlays ends at POS before |
| 2630 | the overlays ends at PREV. */ |
| 2631 | |
| 2632 | /* At first, find a place where disordered overlays should be linked |
| 2633 | in. It is where an overlay which end before POS exists. (i.e. an |
| 2634 | overlay whose ending marker is after-insertion-marker if disorder |
| 2635 | exists). */ |
| 2636 | while (!NILP (*tailp) |
| 2637 | && ((end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car))) |
| 2638 | >= pos)) |
| 2639 | tailp = &XCONS (*tailp)->cdr; |
| 2640 | |
| 2641 | /* If we don't find such an overlay, |
| 2642 | or the found one ends before PREV, |
| 2643 | or the found one is the last one in the list, |
| 2644 | we don't have to fix anything. */ |
| 2645 | if (NILP (*tailp) |
| 2646 | || end < prev |
| 2647 | || NILP (XCONS (*tailp)->cdr)) |
| 2648 | return; |
| 2649 | |
| 2650 | right_place = tailp; |
| 2651 | tailp = &XCONS (*tailp)->cdr; |
| 2652 | |
| 2653 | /* Now, end position of overlays in the list *TAILP should be before |
| 2654 | or equal to PREV. In the loop, an overlay which ends at POS is |
| 2655 | moved ahead to the place pointed by RIGHT_PLACE. If we found an |
| 2656 | overlay which ends before PREV, the remaining overlays are in |
| 2657 | correct order. */ |
| 2658 | while (!NILP (*tailp)) |
| 2659 | { |
| 2660 | end = OVERLAY_POSITION (OVERLAY_END (XCONS (*tailp)->car)); |
| 2661 | |
| 2662 | if (end == pos) |
| 2663 | { /* This overlay is disordered. */ |
| 2664 | Lisp_Object found = *tailp; |
| 2665 | |
| 2666 | /* Unlink the found overlay. */ |
| 2667 | *tailp = XCONS (found)->cdr; |
| 2668 | /* Move an overlay at RIGHT_PLACE to the next of the found one. */ |
| 2669 | XCONS (found)->cdr = *right_place; |
| 2670 | /* Link it into the right place. */ |
| 2671 | *right_place = found; |
| 2672 | } |
| 2673 | else if (end == prev) |
| 2674 | tailp = &XCONS (*tailp)->cdr; |
| 2675 | else /* No more disordered overlay. */ |
| 2676 | break; |
| 2677 | } |
| 2678 | } |
| 2679 | \f |
| 2680 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
| 2681 | "Return t if OBJECT is an overlay.") |
| 2682 | (object) |
| 2683 | Lisp_Object object; |
| 2684 | { |
| 2685 | return (OVERLAYP (object) ? Qt : Qnil); |
| 2686 | } |
| 2687 | |
| 2688 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
| 2689 | "Create a new overlay with range BEG to END in BUFFER.\n\ |
| 2690 | If omitted, BUFFER defaults to the current buffer.\n\ |
| 2691 | BEG and END may be integers or markers.\n\ |
| 2692 | The fourth arg FRONT-ADVANCE, if non-nil, makes the\n\ |
| 2693 | front delimiter advance when text is inserted there.\n\ |
| 2694 | The fifth arg REAR-ADVANCE, if non-nil, makes the\n\ |
| 2695 | rear delimiter advance when text is inserted there.") |
| 2696 | (beg, end, buffer, front_advance, rear_advance) |
| 2697 | Lisp_Object beg, end, buffer; |
| 2698 | Lisp_Object front_advance, rear_advance; |
| 2699 | { |
| 2700 | Lisp_Object overlay; |
| 2701 | struct buffer *b; |
| 2702 | |
| 2703 | if (NILP (buffer)) |
| 2704 | XSETBUFFER (buffer, current_buffer); |
| 2705 | else |
| 2706 | CHECK_BUFFER (buffer, 2); |
| 2707 | if (MARKERP (beg) |
| 2708 | && ! EQ (Fmarker_buffer (beg), buffer)) |
| 2709 | error ("Marker points into wrong buffer"); |
| 2710 | if (MARKERP (end) |
| 2711 | && ! EQ (Fmarker_buffer (end), buffer)) |
| 2712 | error ("Marker points into wrong buffer"); |
| 2713 | |
| 2714 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
| 2715 | CHECK_NUMBER_COERCE_MARKER (end, 1); |
| 2716 | |
| 2717 | if (XINT (beg) > XINT (end)) |
| 2718 | { |
| 2719 | Lisp_Object temp; |
| 2720 | temp = beg; beg = end; end = temp; |
| 2721 | } |
| 2722 | |
| 2723 | b = XBUFFER (buffer); |
| 2724 | |
| 2725 | beg = Fset_marker (Fmake_marker (), beg, buffer); |
| 2726 | end = Fset_marker (Fmake_marker (), end, buffer); |
| 2727 | |
| 2728 | if (!NILP (front_advance)) |
| 2729 | XMARKER (beg)->insertion_type = 1; |
| 2730 | if (!NILP (rear_advance)) |
| 2731 | XMARKER (end)->insertion_type = 1; |
| 2732 | |
| 2733 | overlay = allocate_misc (); |
| 2734 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
| 2735 | XOVERLAY (overlay)->start = beg; |
| 2736 | XOVERLAY (overlay)->end = end; |
| 2737 | XOVERLAY (overlay)->plist = Qnil; |
| 2738 | |
| 2739 | /* Put the new overlay on the wrong list. */ |
| 2740 | end = OVERLAY_END (overlay); |
| 2741 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
| 2742 | b->overlays_after = Fcons (overlay, b->overlays_after); |
| 2743 | else |
| 2744 | b->overlays_before = Fcons (overlay, b->overlays_before); |
| 2745 | |
| 2746 | /* This puts it in the right list, and in the right order. */ |
| 2747 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
| 2748 | |
| 2749 | /* We don't need to redisplay the region covered by the overlay, because |
| 2750 | the overlay has no properties at the moment. */ |
| 2751 | |
| 2752 | return overlay; |
| 2753 | } |
| 2754 | \f |
| 2755 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ |
| 2756 | |
| 2757 | static void |
| 2758 | modify_overlay (buf, start, end) |
| 2759 | struct buffer *buf; |
| 2760 | int start, end; |
| 2761 | { |
| 2762 | if (start == end) |
| 2763 | return; |
| 2764 | |
| 2765 | if (start > end) |
| 2766 | { |
| 2767 | int temp = start; |
| 2768 | start = end; end = temp; |
| 2769 | } |
| 2770 | |
| 2771 | /* If this is a buffer not in the selected window, |
| 2772 | we must do other windows. */ |
| 2773 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) |
| 2774 | windows_or_buffers_changed = 1; |
| 2775 | /* If it's not current, we can't use beg_unchanged, end_unchanged for it. */ |
| 2776 | else if (buf != current_buffer) |
| 2777 | windows_or_buffers_changed = 1; |
| 2778 | /* If multiple windows show this buffer, we must do other windows. */ |
| 2779 | else if (buffer_shared > 1) |
| 2780 | windows_or_buffers_changed = 1; |
| 2781 | else |
| 2782 | { |
| 2783 | if (unchanged_modified == MODIFF |
| 2784 | && overlay_unchanged_modified == OVERLAY_MODIFF) |
| 2785 | { |
| 2786 | beg_unchanged = start - BEG; |
| 2787 | end_unchanged = Z - end; |
| 2788 | } |
| 2789 | else |
| 2790 | { |
| 2791 | if (Z - end < end_unchanged) |
| 2792 | end_unchanged = Z - end; |
| 2793 | if (start - BEG < beg_unchanged) |
| 2794 | beg_unchanged = start - BEG; |
| 2795 | } |
| 2796 | } |
| 2797 | |
| 2798 | ++OVERLAY_MODIFF; |
| 2799 | } |
| 2800 | |
| 2801 | \f\f |
| 2802 | Lisp_Object Fdelete_overlay (); |
| 2803 | |
| 2804 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
| 2805 | "Set the endpoints of OVERLAY to BEG and END in BUFFER.\n\ |
| 2806 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now.\n\ |
| 2807 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current\n\ |
| 2808 | buffer.") |
| 2809 | (overlay, beg, end, buffer) |
| 2810 | Lisp_Object overlay, beg, end, buffer; |
| 2811 | { |
| 2812 | struct buffer *b, *ob; |
| 2813 | Lisp_Object obuffer; |
| 2814 | int count = specpdl_ptr - specpdl; |
| 2815 | |
| 2816 | CHECK_OVERLAY (overlay, 0); |
| 2817 | if (NILP (buffer)) |
| 2818 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
| 2819 | if (NILP (buffer)) |
| 2820 | XSETBUFFER (buffer, current_buffer); |
| 2821 | CHECK_BUFFER (buffer, 3); |
| 2822 | |
| 2823 | if (MARKERP (beg) |
| 2824 | && ! EQ (Fmarker_buffer (beg), buffer)) |
| 2825 | error ("Marker points into wrong buffer"); |
| 2826 | if (MARKERP (end) |
| 2827 | && ! EQ (Fmarker_buffer (end), buffer)) |
| 2828 | error ("Marker points into wrong buffer"); |
| 2829 | |
| 2830 | CHECK_NUMBER_COERCE_MARKER (beg, 1); |
| 2831 | CHECK_NUMBER_COERCE_MARKER (end, 1); |
| 2832 | |
| 2833 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
| 2834 | return Fdelete_overlay (overlay); |
| 2835 | |
| 2836 | if (XINT (beg) > XINT (end)) |
| 2837 | { |
| 2838 | Lisp_Object temp; |
| 2839 | temp = beg; beg = end; end = temp; |
| 2840 | } |
| 2841 | |
| 2842 | specbind (Qinhibit_quit, Qt); |
| 2843 | |
| 2844 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
| 2845 | b = XBUFFER (buffer); |
| 2846 | ob = XBUFFER (obuffer); |
| 2847 | |
| 2848 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
| 2849 | if (!EQ (buffer, obuffer)) |
| 2850 | { |
| 2851 | /* Redisplay where the overlay was. */ |
| 2852 | if (!NILP (obuffer)) |
| 2853 | { |
| 2854 | int o_beg; |
| 2855 | int o_end; |
| 2856 | |
| 2857 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2858 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2859 | |
| 2860 | modify_overlay (ob, o_beg, o_end); |
| 2861 | } |
| 2862 | |
| 2863 | /* Redisplay where the overlay is going to be. */ |
| 2864 | modify_overlay (b, XINT (beg), XINT (end)); |
| 2865 | } |
| 2866 | else |
| 2867 | /* Redisplay the area the overlay has just left, or just enclosed. */ |
| 2868 | { |
| 2869 | int o_beg, o_end; |
| 2870 | int change_beg, change_end; |
| 2871 | |
| 2872 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 2873 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 2874 | |
| 2875 | if (o_beg == XINT (beg)) |
| 2876 | modify_overlay (b, o_end, XINT (end)); |
| 2877 | else if (o_end == XINT (end)) |
| 2878 | modify_overlay (b, o_beg, XINT (beg)); |
| 2879 | else |
| 2880 | { |
| 2881 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
| 2882 | if (XINT (end) > o_end) o_end = XINT (end); |
| 2883 | modify_overlay (b, o_beg, o_end); |
| 2884 | } |
| 2885 | } |
| 2886 | |
| 2887 | if (!NILP (obuffer)) |
| 2888 | { |
| 2889 | ob->overlays_before = Fdelq (overlay, ob->overlays_before); |
| 2890 | ob->overlays_after = Fdelq (overlay, ob->overlays_after); |
| 2891 | } |
| 2892 | |
| 2893 | Fset_marker (OVERLAY_START (overlay), beg, buffer); |
| 2894 | Fset_marker (OVERLAY_END (overlay), end, buffer); |
| 2895 | |
| 2896 | /* Put the overlay on the wrong list. */ |
| 2897 | end = OVERLAY_END (overlay); |
| 2898 | if (OVERLAY_POSITION (end) < XINT (b->overlay_center)) |
| 2899 | b->overlays_after = Fcons (overlay, b->overlays_after); |
| 2900 | else |
| 2901 | b->overlays_before = Fcons (overlay, b->overlays_before); |
| 2902 | |
| 2903 | /* This puts it in the right list, and in the right order. */ |
| 2904 | recenter_overlay_lists (b, XINT (b->overlay_center)); |
| 2905 | |
| 2906 | return unbind_to (count, overlay); |
| 2907 | } |
| 2908 | |
| 2909 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, |
| 2910 | "Delete the overlay OVERLAY from its buffer.") |
| 2911 | (overlay) |
| 2912 | Lisp_Object overlay; |
| 2913 | { |
| 2914 | Lisp_Object buffer; |
| 2915 | struct buffer *b; |
| 2916 | int count = specpdl_ptr - specpdl; |
| 2917 | |
| 2918 | CHECK_OVERLAY (overlay, 0); |
| 2919 | |
| 2920 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
| 2921 | if (NILP (buffer)) |
| 2922 | return Qnil; |
| 2923 | |
| 2924 | b = XBUFFER (buffer); |
| 2925 | |
| 2926 | specbind (Qinhibit_quit, Qt); |
| 2927 | |
| 2928 | b->overlays_before = Fdelq (overlay, b->overlays_before); |
| 2929 | b->overlays_after = Fdelq (overlay, b->overlays_after); |
| 2930 | |
| 2931 | modify_overlay (b, |
| 2932 | marker_position (OVERLAY_START (overlay)), |
| 2933 | marker_position (OVERLAY_END (overlay))); |
| 2934 | |
| 2935 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
| 2936 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); |
| 2937 | |
| 2938 | return unbind_to (count, Qnil); |
| 2939 | } |
| 2940 | \f |
| 2941 | /* Overlay dissection functions. */ |
| 2942 | |
| 2943 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, |
| 2944 | "Return the position at which OVERLAY starts.") |
| 2945 | (overlay) |
| 2946 | Lisp_Object overlay; |
| 2947 | { |
| 2948 | CHECK_OVERLAY (overlay, 0); |
| 2949 | |
| 2950 | return (Fmarker_position (OVERLAY_START (overlay))); |
| 2951 | } |
| 2952 | |
| 2953 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, |
| 2954 | "Return the position at which OVERLAY ends.") |
| 2955 | (overlay) |
| 2956 | Lisp_Object overlay; |
| 2957 | { |
| 2958 | CHECK_OVERLAY (overlay, 0); |
| 2959 | |
| 2960 | return (Fmarker_position (OVERLAY_END (overlay))); |
| 2961 | } |
| 2962 | |
| 2963 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, |
| 2964 | "Return the buffer OVERLAY belongs to.") |
| 2965 | (overlay) |
| 2966 | Lisp_Object overlay; |
| 2967 | { |
| 2968 | CHECK_OVERLAY (overlay, 0); |
| 2969 | |
| 2970 | return Fmarker_buffer (OVERLAY_START (overlay)); |
| 2971 | } |
| 2972 | |
| 2973 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, |
| 2974 | "Return a list of the properties on OVERLAY.\n\ |
| 2975 | This is a copy of OVERLAY's plist; modifying its conses has no effect on\n\ |
| 2976 | OVERLAY.") |
| 2977 | (overlay) |
| 2978 | Lisp_Object overlay; |
| 2979 | { |
| 2980 | CHECK_OVERLAY (overlay, 0); |
| 2981 | |
| 2982 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
| 2983 | } |
| 2984 | |
| 2985 | \f |
| 2986 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
| 2987 | "Return a list of the overlays that contain position POS.") |
| 2988 | (pos) |
| 2989 | Lisp_Object pos; |
| 2990 | { |
| 2991 | int noverlays; |
| 2992 | Lisp_Object *overlay_vec; |
| 2993 | int len; |
| 2994 | Lisp_Object result; |
| 2995 | |
| 2996 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 2997 | |
| 2998 | len = 10; |
| 2999 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
| 3000 | |
| 3001 | /* Put all the overlays we want in a vector in overlay_vec. |
| 3002 | Store the length in len. */ |
| 3003 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
| 3004 | (int *) 0, (int *) 0); |
| 3005 | |
| 3006 | /* Make a list of them all. */ |
| 3007 | result = Flist (noverlays, overlay_vec); |
| 3008 | |
| 3009 | xfree (overlay_vec); |
| 3010 | return result; |
| 3011 | } |
| 3012 | |
| 3013 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
| 3014 | "Return a list of the overlays that overlap the region BEG ... END.\n\ |
| 3015 | Overlap means that at least one character is contained within the overlay\n\ |
| 3016 | and also contained within the specified region.\n\ |
| 3017 | Empty overlays are included in the result if they are located at BEG\n\ |
| 3018 | or between BEG and END.") |
| 3019 | (beg, end) |
| 3020 | Lisp_Object beg, end; |
| 3021 | { |
| 3022 | int noverlays; |
| 3023 | Lisp_Object *overlay_vec; |
| 3024 | int len; |
| 3025 | Lisp_Object result; |
| 3026 | |
| 3027 | CHECK_NUMBER_COERCE_MARKER (beg, 0); |
| 3028 | CHECK_NUMBER_COERCE_MARKER (end, 0); |
| 3029 | |
| 3030 | len = 10; |
| 3031 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
| 3032 | |
| 3033 | /* Put all the overlays we want in a vector in overlay_vec. |
| 3034 | Store the length in len. */ |
| 3035 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, |
| 3036 | (int *) 0, (int *) 0); |
| 3037 | |
| 3038 | /* Make a list of them all. */ |
| 3039 | result = Flist (noverlays, overlay_vec); |
| 3040 | |
| 3041 | xfree (overlay_vec); |
| 3042 | return result; |
| 3043 | } |
| 3044 | |
| 3045 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
| 3046 | 1, 1, 0, |
| 3047 | "Return the next position after POS where an overlay starts or ends.\n\ |
| 3048 | If there are no more overlay boundaries after POS, return (point-max).") |
| 3049 | (pos) |
| 3050 | Lisp_Object pos; |
| 3051 | { |
| 3052 | int noverlays; |
| 3053 | int endpos; |
| 3054 | Lisp_Object *overlay_vec; |
| 3055 | int len; |
| 3056 | int i; |
| 3057 | |
| 3058 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 3059 | |
| 3060 | len = 10; |
| 3061 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
| 3062 | |
| 3063 | /* Put all the overlays we want in a vector in overlay_vec. |
| 3064 | Store the length in len. |
| 3065 | endpos gets the position where the next overlay starts. */ |
| 3066 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
| 3067 | &endpos, (int *) 0); |
| 3068 | |
| 3069 | /* If any of these overlays ends before endpos, |
| 3070 | use its ending point instead. */ |
| 3071 | for (i = 0; i < noverlays; i++) |
| 3072 | { |
| 3073 | Lisp_Object oend; |
| 3074 | int oendpos; |
| 3075 | |
| 3076 | oend = OVERLAY_END (overlay_vec[i]); |
| 3077 | oendpos = OVERLAY_POSITION (oend); |
| 3078 | if (oendpos < endpos) |
| 3079 | endpos = oendpos; |
| 3080 | } |
| 3081 | |
| 3082 | xfree (overlay_vec); |
| 3083 | return make_number (endpos); |
| 3084 | } |
| 3085 | |
| 3086 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, |
| 3087 | Sprevious_overlay_change, 1, 1, 0, |
| 3088 | "Return the previous position before POS where an overlay starts or ends.\n\ |
| 3089 | If there are no more overlay boundaries before POS, return (point-min).") |
| 3090 | (pos) |
| 3091 | Lisp_Object pos; |
| 3092 | { |
| 3093 | int noverlays; |
| 3094 | int prevpos; |
| 3095 | Lisp_Object *overlay_vec; |
| 3096 | int len; |
| 3097 | int i; |
| 3098 | Lisp_Object tail; |
| 3099 | |
| 3100 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 3101 | |
| 3102 | len = 10; |
| 3103 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
| 3104 | |
| 3105 | /* At beginning of buffer, we know the answer; |
| 3106 | avoid bug subtracting 1 below. */ |
| 3107 | if (XINT (pos) == BEGV) |
| 3108 | return pos; |
| 3109 | |
| 3110 | /* Put all the overlays we want in a vector in overlay_vec. |
| 3111 | Store the length in len. |
| 3112 | prevpos gets the position of an overlay end. */ |
| 3113 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
| 3114 | (int *) 0, &prevpos); |
| 3115 | |
| 3116 | /* If any of these overlays starts after prevpos, |
| 3117 | maybe use its starting point instead. */ |
| 3118 | for (i = 0; i < noverlays; i++) |
| 3119 | { |
| 3120 | Lisp_Object ostart; |
| 3121 | int ostartpos; |
| 3122 | |
| 3123 | ostart = OVERLAY_START (overlay_vec[i]); |
| 3124 | ostartpos = OVERLAY_POSITION (ostart); |
| 3125 | if (ostartpos > prevpos && ostartpos < XINT (pos)) |
| 3126 | prevpos = ostartpos; |
| 3127 | } |
| 3128 | |
| 3129 | /* If any overlay ends at pos, consider its starting point too. */ |
| 3130 | for (tail = current_buffer->overlays_before; |
| 3131 | GC_CONSP (tail); |
| 3132 | tail = XCONS (tail)->cdr) |
| 3133 | { |
| 3134 | Lisp_Object overlay, ostart; |
| 3135 | int ostartpos; |
| 3136 | |
| 3137 | overlay = XCONS (tail)->car; |
| 3138 | |
| 3139 | ostart = OVERLAY_START (overlay); |
| 3140 | ostartpos = OVERLAY_POSITION (ostart); |
| 3141 | if (ostartpos > prevpos && ostartpos < XINT (pos)) |
| 3142 | prevpos = ostartpos; |
| 3143 | } |
| 3144 | |
| 3145 | xfree (overlay_vec); |
| 3146 | return make_number (prevpos); |
| 3147 | } |
| 3148 | \f |
| 3149 | /* These functions are for debugging overlays. */ |
| 3150 | |
| 3151 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, |
| 3152 | "Return a pair of lists giving all the overlays of the current buffer.\n\ |
| 3153 | The car has all the overlays before the overlay center;\n\ |
| 3154 | the cdr has all the overlays after the overlay center.\n\ |
| 3155 | Recentering overlays moves overlays between these lists.\n\ |
| 3156 | The lists you get are copies, so that changing them has no effect.\n\ |
| 3157 | However, the overlays you get are the real objects that the buffer uses.") |
| 3158 | () |
| 3159 | { |
| 3160 | Lisp_Object before, after; |
| 3161 | before = current_buffer->overlays_before; |
| 3162 | if (CONSP (before)) |
| 3163 | before = Fcopy_sequence (before); |
| 3164 | after = current_buffer->overlays_after; |
| 3165 | if (CONSP (after)) |
| 3166 | after = Fcopy_sequence (after); |
| 3167 | |
| 3168 | return Fcons (before, after); |
| 3169 | } |
| 3170 | |
| 3171 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, |
| 3172 | "Recenter the overlays of the current buffer around position POS.") |
| 3173 | (pos) |
| 3174 | Lisp_Object pos; |
| 3175 | { |
| 3176 | CHECK_NUMBER_COERCE_MARKER (pos, 0); |
| 3177 | |
| 3178 | recenter_overlay_lists (current_buffer, XINT (pos)); |
| 3179 | return Qnil; |
| 3180 | } |
| 3181 | \f |
| 3182 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, |
| 3183 | "Get the property of overlay OVERLAY with property name PROP.") |
| 3184 | (overlay, prop) |
| 3185 | Lisp_Object overlay, prop; |
| 3186 | { |
| 3187 | Lisp_Object plist, fallback; |
| 3188 | |
| 3189 | CHECK_OVERLAY (overlay, 0); |
| 3190 | |
| 3191 | fallback = Qnil; |
| 3192 | |
| 3193 | for (plist = XOVERLAY (overlay)->plist; |
| 3194 | CONSP (plist) && CONSP (XCONS (plist)->cdr); |
| 3195 | plist = XCONS (XCONS (plist)->cdr)->cdr) |
| 3196 | { |
| 3197 | if (EQ (XCONS (plist)->car, prop)) |
| 3198 | return XCONS (XCONS (plist)->cdr)->car; |
| 3199 | else if (EQ (XCONS (plist)->car, Qcategory)) |
| 3200 | { |
| 3201 | Lisp_Object tem; |
| 3202 | tem = Fcar (Fcdr (plist)); |
| 3203 | if (SYMBOLP (tem)) |
| 3204 | fallback = Fget (tem, prop); |
| 3205 | } |
| 3206 | } |
| 3207 | |
| 3208 | return fallback; |
| 3209 | } |
| 3210 | |
| 3211 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, |
| 3212 | "Set one property of overlay OVERLAY: give property PROP value VALUE.") |
| 3213 | (overlay, prop, value) |
| 3214 | Lisp_Object overlay, prop, value; |
| 3215 | { |
| 3216 | Lisp_Object tail, buffer; |
| 3217 | int changed; |
| 3218 | |
| 3219 | CHECK_OVERLAY (overlay, 0); |
| 3220 | |
| 3221 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
| 3222 | |
| 3223 | for (tail = XOVERLAY (overlay)->plist; |
| 3224 | CONSP (tail) && CONSP (XCONS (tail)->cdr); |
| 3225 | tail = XCONS (XCONS (tail)->cdr)->cdr) |
| 3226 | if (EQ (XCONS (tail)->car, prop)) |
| 3227 | { |
| 3228 | changed = !EQ (XCONS (XCONS (tail)->cdr)->car, value); |
| 3229 | XCONS (XCONS (tail)->cdr)->car = value; |
| 3230 | goto found; |
| 3231 | } |
| 3232 | /* It wasn't in the list, so add it to the front. */ |
| 3233 | changed = !NILP (value); |
| 3234 | XOVERLAY (overlay)->plist |
| 3235 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); |
| 3236 | found: |
| 3237 | if (! NILP (buffer)) |
| 3238 | { |
| 3239 | if (changed) |
| 3240 | modify_overlay (XBUFFER (buffer), |
| 3241 | marker_position (OVERLAY_START (overlay)), |
| 3242 | marker_position (OVERLAY_END (overlay))); |
| 3243 | if (EQ (prop, Qevaporate) && ! NILP (value) |
| 3244 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) |
| 3245 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) |
| 3246 | Fdelete_overlay (overlay); |
| 3247 | } |
| 3248 | return value; |
| 3249 | } |
| 3250 | \f |
| 3251 | /* Subroutine of report_overlay_modification. */ |
| 3252 | |
| 3253 | /* Lisp vector holding overlay hook functions to call. |
| 3254 | Vector elements come in pairs. |
| 3255 | Each even-index element is a list of hook functions. |
| 3256 | The following odd-index element is the overlay they came from. |
| 3257 | |
| 3258 | Before the buffer change, we fill in this vector |
| 3259 | as we call overlay hook functions. |
| 3260 | After the buffer change, we get the functions to call from this vector. |
| 3261 | This way we always call the same functions before and after the change. */ |
| 3262 | static Lisp_Object last_overlay_modification_hooks; |
| 3263 | |
| 3264 | /* Number of elements actually used in last_overlay_modification_hooks. */ |
| 3265 | static int last_overlay_modification_hooks_used; |
| 3266 | |
| 3267 | /* Add one functionlist/overlay pair |
| 3268 | to the end of last_overlay_modification_hooks. */ |
| 3269 | |
| 3270 | static void |
| 3271 | add_overlay_mod_hooklist (functionlist, overlay) |
| 3272 | Lisp_Object functionlist, overlay; |
| 3273 | { |
| 3274 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; |
| 3275 | |
| 3276 | if (last_overlay_modification_hooks_used == oldsize) |
| 3277 | { |
| 3278 | Lisp_Object old; |
| 3279 | old = last_overlay_modification_hooks; |
| 3280 | last_overlay_modification_hooks |
| 3281 | = Fmake_vector (make_number (oldsize * 2), Qnil); |
| 3282 | bcopy (XVECTOR (old)->contents, |
| 3283 | XVECTOR (last_overlay_modification_hooks)->contents, |
| 3284 | sizeof (Lisp_Object) * oldsize); |
| 3285 | } |
| 3286 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = functionlist; |
| 3287 | XVECTOR (last_overlay_modification_hooks)->contents[last_overlay_modification_hooks_used++] = overlay; |
| 3288 | } |
| 3289 | \f |
| 3290 | /* Run the modification-hooks of overlays that include |
| 3291 | any part of the text in START to END. |
| 3292 | If this change is an insertion, also |
| 3293 | run the insert-before-hooks of overlay starting at END, |
| 3294 | and the insert-after-hooks of overlay ending at START. |
| 3295 | |
| 3296 | This is called both before and after the modification. |
| 3297 | AFTER is nonzero when we call after the modification. |
| 3298 | |
| 3299 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
| 3300 | When AFTER is nonzero, they are the start position, |
| 3301 | the position after the inserted new text, |
| 3302 | and the length of deleted or replaced old text. */ |
| 3303 | |
| 3304 | void |
| 3305 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
| 3306 | Lisp_Object start, end; |
| 3307 | int after; |
| 3308 | Lisp_Object arg1, arg2, arg3; |
| 3309 | { |
| 3310 | Lisp_Object prop, overlay, tail; |
| 3311 | /* 1 if this change is an insertion. */ |
| 3312 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); |
| 3313 | int tail_copied; |
| 3314 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4, gcpro5; |
| 3315 | |
| 3316 | overlay = Qnil; |
| 3317 | tail = Qnil; |
| 3318 | GCPRO5 (overlay, tail, arg1, arg2, arg3); |
| 3319 | |
| 3320 | if (after) |
| 3321 | { |
| 3322 | /* Call the functions recorded in last_overlay_modification_hooks |
| 3323 | rather than scanning the overlays again. |
| 3324 | First copy the vector contents, in case some of these hooks |
| 3325 | do subsequent modification of the buffer. */ |
| 3326 | int size = last_overlay_modification_hooks_used; |
| 3327 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); |
| 3328 | int i; |
| 3329 | |
| 3330 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, |
| 3331 | copy, size * sizeof (Lisp_Object)); |
| 3332 | gcpro1.var = copy; |
| 3333 | gcpro1.nvars = size; |
| 3334 | |
| 3335 | for (i = 0; i < size;) |
| 3336 | { |
| 3337 | Lisp_Object prop, overlay; |
| 3338 | prop = copy[i++]; |
| 3339 | overlay = copy[i++]; |
| 3340 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
| 3341 | } |
| 3342 | UNGCPRO; |
| 3343 | return; |
| 3344 | } |
| 3345 | |
| 3346 | /* We are being called before a change. |
| 3347 | Scan the overlays to find the functions to call. */ |
| 3348 | last_overlay_modification_hooks_used = 0; |
| 3349 | tail_copied = 0; |
| 3350 | for (tail = current_buffer->overlays_before; |
| 3351 | CONSP (tail); |
| 3352 | tail = XCONS (tail)->cdr) |
| 3353 | { |
| 3354 | int startpos, endpos; |
| 3355 | Lisp_Object ostart, oend; |
| 3356 | |
| 3357 | overlay = XCONS (tail)->car; |
| 3358 | |
| 3359 | ostart = OVERLAY_START (overlay); |
| 3360 | oend = OVERLAY_END (overlay); |
| 3361 | endpos = OVERLAY_POSITION (oend); |
| 3362 | if (XFASTINT (start) > endpos) |
| 3363 | break; |
| 3364 | startpos = OVERLAY_POSITION (ostart); |
| 3365 | if (insertion && (XFASTINT (start) == startpos |
| 3366 | || XFASTINT (end) == startpos)) |
| 3367 | { |
| 3368 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
| 3369 | if (!NILP (prop)) |
| 3370 | { |
| 3371 | /* Copy TAIL in case the hook recenters the overlay lists. */ |
| 3372 | if (!tail_copied) |
| 3373 | tail = Fcopy_sequence (tail); |
| 3374 | tail_copied = 1; |
| 3375 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
| 3376 | } |
| 3377 | } |
| 3378 | if (insertion && (XFASTINT (start) == endpos |
| 3379 | || XFASTINT (end) == endpos)) |
| 3380 | { |
| 3381 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
| 3382 | if (!NILP (prop)) |
| 3383 | { |
| 3384 | if (!tail_copied) |
| 3385 | tail = Fcopy_sequence (tail); |
| 3386 | tail_copied = 1; |
| 3387 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
| 3388 | } |
| 3389 | } |
| 3390 | /* Test for intersecting intervals. This does the right thing |
| 3391 | for both insertion and deletion. */ |
| 3392 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) |
| 3393 | { |
| 3394 | prop = Foverlay_get (overlay, Qmodification_hooks); |
| 3395 | if (!NILP (prop)) |
| 3396 | { |
| 3397 | if (!tail_copied) |
| 3398 | tail = Fcopy_sequence (tail); |
| 3399 | tail_copied = 1; |
| 3400 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
| 3401 | } |
| 3402 | } |
| 3403 | } |
| 3404 | |
| 3405 | tail_copied = 0; |
| 3406 | for (tail = current_buffer->overlays_after; |
| 3407 | CONSP (tail); |
| 3408 | tail = XCONS (tail)->cdr) |
| 3409 | { |
| 3410 | int startpos, endpos; |
| 3411 | Lisp_Object ostart, oend; |
| 3412 | |
| 3413 | overlay = XCONS (tail)->car; |
| 3414 | |
| 3415 | ostart = OVERLAY_START (overlay); |
| 3416 | oend = OVERLAY_END (overlay); |
| 3417 | startpos = OVERLAY_POSITION (ostart); |
| 3418 | endpos = OVERLAY_POSITION (oend); |
| 3419 | if (XFASTINT (end) < startpos) |
| 3420 | break; |
| 3421 | if (insertion && (XFASTINT (start) == startpos |
| 3422 | || XFASTINT (end) == startpos)) |
| 3423 | { |
| 3424 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
| 3425 | if (!NILP (prop)) |
| 3426 | { |
| 3427 | if (!tail_copied) |
| 3428 | tail = Fcopy_sequence (tail); |
| 3429 | tail_copied = 1; |
| 3430 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
| 3431 | } |
| 3432 | } |
| 3433 | if (insertion && (XFASTINT (start) == endpos |
| 3434 | || XFASTINT (end) == endpos)) |
| 3435 | { |
| 3436 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
| 3437 | if (!NILP (prop)) |
| 3438 | { |
| 3439 | if (!tail_copied) |
| 3440 | tail = Fcopy_sequence (tail); |
| 3441 | tail_copied = 1; |
| 3442 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
| 3443 | } |
| 3444 | } |
| 3445 | /* Test for intersecting intervals. This does the right thing |
| 3446 | for both insertion and deletion. */ |
| 3447 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) |
| 3448 | { |
| 3449 | prop = Foverlay_get (overlay, Qmodification_hooks); |
| 3450 | if (!NILP (prop)) |
| 3451 | { |
| 3452 | if (!tail_copied) |
| 3453 | tail = Fcopy_sequence (tail); |
| 3454 | tail_copied = 1; |
| 3455 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); |
| 3456 | } |
| 3457 | } |
| 3458 | } |
| 3459 | |
| 3460 | UNGCPRO; |
| 3461 | } |
| 3462 | |
| 3463 | static void |
| 3464 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
| 3465 | Lisp_Object list, overlay; |
| 3466 | int after; |
| 3467 | Lisp_Object arg1, arg2, arg3; |
| 3468 | { |
| 3469 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
| 3470 | |
| 3471 | GCPRO4 (list, arg1, arg2, arg3); |
| 3472 | if (! after) |
| 3473 | add_overlay_mod_hooklist (list, overlay); |
| 3474 | |
| 3475 | while (!NILP (list)) |
| 3476 | { |
| 3477 | if (NILP (arg3)) |
| 3478 | call4 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2); |
| 3479 | else |
| 3480 | call5 (Fcar (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
| 3481 | list = Fcdr (list); |
| 3482 | } |
| 3483 | UNGCPRO; |
| 3484 | } |
| 3485 | |
| 3486 | /* Delete any zero-sized overlays at position POS, if the `evaporate' |
| 3487 | property is set. */ |
| 3488 | void |
| 3489 | evaporate_overlays (pos) |
| 3490 | int pos; |
| 3491 | { |
| 3492 | Lisp_Object tail, overlay, hit_list; |
| 3493 | |
| 3494 | hit_list = Qnil; |
| 3495 | if (pos <= XFASTINT (current_buffer->overlay_center)) |
| 3496 | for (tail = current_buffer->overlays_before; CONSP (tail); |
| 3497 | tail = XCONS (tail)->cdr) |
| 3498 | { |
| 3499 | int endpos; |
| 3500 | overlay = XCONS (tail)->car; |
| 3501 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
| 3502 | if (endpos < pos) |
| 3503 | break; |
| 3504 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos |
| 3505 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
| 3506 | hit_list = Fcons (overlay, hit_list); |
| 3507 | } |
| 3508 | else |
| 3509 | for (tail = current_buffer->overlays_after; CONSP (tail); |
| 3510 | tail = XCONS (tail)->cdr) |
| 3511 | { |
| 3512 | int startpos; |
| 3513 | overlay = XCONS (tail)->car; |
| 3514 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
| 3515 | if (startpos > pos) |
| 3516 | break; |
| 3517 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos |
| 3518 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
| 3519 | hit_list = Fcons (overlay, hit_list); |
| 3520 | } |
| 3521 | for (; CONSP (hit_list); hit_list = XCONS (hit_list)->cdr) |
| 3522 | Fdelete_overlay (XCONS (hit_list)->car); |
| 3523 | } |
| 3524 | \f |
| 3525 | /* Somebody has tried to store a value with an unacceptable type |
| 3526 | into the buffer-local slot with offset OFFSET. */ |
| 3527 | void |
| 3528 | buffer_slot_type_mismatch (offset) |
| 3529 | int offset; |
| 3530 | { |
| 3531 | Lisp_Object sym; |
| 3532 | char *type_name; |
| 3533 | sym = *(Lisp_Object *)(offset + (char *)&buffer_local_symbols); |
| 3534 | switch (XINT (*(Lisp_Object *)(offset + (char *)&buffer_local_types))) |
| 3535 | { |
| 3536 | case Lisp_Int: type_name = "integers"; break; |
| 3537 | case Lisp_String: type_name = "strings"; break; |
| 3538 | case Lisp_Symbol: type_name = "symbols"; break; |
| 3539 | default: |
| 3540 | abort (); |
| 3541 | } |
| 3542 | |
| 3543 | error ("only %s should be stored in the buffer-local variable %s", |
| 3544 | type_name, XSYMBOL (sym)->name->data); |
| 3545 | } |
| 3546 | \f |
| 3547 | init_buffer_once () |
| 3548 | { |
| 3549 | register Lisp_Object tem; |
| 3550 | |
| 3551 | buffer_permanent_local_flags = 0; |
| 3552 | |
| 3553 | /* Make sure all markable slots in buffer_defaults |
| 3554 | are initialized reasonably, so mark_buffer won't choke. */ |
| 3555 | reset_buffer (&buffer_defaults); |
| 3556 | reset_buffer_local_variables (&buffer_defaults, 1); |
| 3557 | reset_buffer (&buffer_local_symbols); |
| 3558 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
| 3559 | /* Prevent GC from getting confused. */ |
| 3560 | buffer_defaults.text = &buffer_defaults.own_text; |
| 3561 | buffer_local_symbols.text = &buffer_local_symbols.own_text; |
| 3562 | #ifdef USE_TEXT_PROPERTIES |
| 3563 | BUF_INTERVALS (&buffer_defaults) = 0; |
| 3564 | BUF_INTERVALS (&buffer_local_symbols) = 0; |
| 3565 | #endif |
| 3566 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
| 3567 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
| 3568 | |
| 3569 | /* Set up the default values of various buffer slots. */ |
| 3570 | /* Must do these before making the first buffer! */ |
| 3571 | |
| 3572 | /* real setup is done in loaddefs.el */ |
| 3573 | buffer_defaults.mode_line_format = build_string ("%-"); |
| 3574 | buffer_defaults.abbrev_mode = Qnil; |
| 3575 | buffer_defaults.overwrite_mode = Qnil; |
| 3576 | buffer_defaults.case_fold_search = Qt; |
| 3577 | buffer_defaults.auto_fill_function = Qnil; |
| 3578 | buffer_defaults.selective_display = Qnil; |
| 3579 | #ifndef old |
| 3580 | buffer_defaults.selective_display_ellipses = Qt; |
| 3581 | #endif |
| 3582 | buffer_defaults.abbrev_table = Qnil; |
| 3583 | buffer_defaults.display_table = Qnil; |
| 3584 | buffer_defaults.undo_list = Qnil; |
| 3585 | buffer_defaults.mark_active = Qnil; |
| 3586 | buffer_defaults.file_format = Qnil; |
| 3587 | buffer_defaults.overlays_before = Qnil; |
| 3588 | buffer_defaults.overlays_after = Qnil; |
| 3589 | XSETFASTINT (buffer_defaults.overlay_center, BEG); |
| 3590 | |
| 3591 | XSETFASTINT (buffer_defaults.tab_width, 8); |
| 3592 | buffer_defaults.truncate_lines = Qnil; |
| 3593 | buffer_defaults.ctl_arrow = Qt; |
| 3594 | buffer_defaults.direction_reversed = Qnil; |
| 3595 | |
| 3596 | #ifdef DOS_NT |
| 3597 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
| 3598 | #endif |
| 3599 | buffer_defaults.enable_multibyte_characters = Qt; |
| 3600 | buffer_defaults.buffer_file_coding_system = Qnil; |
| 3601 | XSETFASTINT (buffer_defaults.fill_column, 70); |
| 3602 | XSETFASTINT (buffer_defaults.left_margin, 0); |
| 3603 | buffer_defaults.cache_long_line_scans = Qnil; |
| 3604 | buffer_defaults.file_truename = Qnil; |
| 3605 | XSETFASTINT (buffer_defaults.display_count, 0); |
| 3606 | |
| 3607 | /* Assign the local-flags to the slots that have default values. |
| 3608 | The local flag is a bit that is used in the buffer |
| 3609 | to say that it has its own local value for the slot. |
| 3610 | The local flag bits are in the local_var_flags slot of the buffer. */ |
| 3611 | |
| 3612 | /* Nothing can work if this isn't true */ |
| 3613 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
| 3614 | |
| 3615 | /* 0 means not a lisp var, -1 means always local, else mask */ |
| 3616 | bzero (&buffer_local_flags, sizeof buffer_local_flags); |
| 3617 | XSETINT (buffer_local_flags.filename, -1); |
| 3618 | XSETINT (buffer_local_flags.directory, -1); |
| 3619 | XSETINT (buffer_local_flags.backed_up, -1); |
| 3620 | XSETINT (buffer_local_flags.save_length, -1); |
| 3621 | XSETINT (buffer_local_flags.auto_save_file_name, -1); |
| 3622 | XSETINT (buffer_local_flags.read_only, -1); |
| 3623 | XSETINT (buffer_local_flags.major_mode, -1); |
| 3624 | XSETINT (buffer_local_flags.mode_name, -1); |
| 3625 | XSETINT (buffer_local_flags.undo_list, -1); |
| 3626 | XSETINT (buffer_local_flags.mark_active, -1); |
| 3627 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
| 3628 | XSETINT (buffer_local_flags.file_truename, -1); |
| 3629 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
| 3630 | XSETINT (buffer_local_flags.file_format, -1); |
| 3631 | XSETINT (buffer_local_flags.display_count, -1); |
| 3632 | |
| 3633 | XSETFASTINT (buffer_local_flags.mode_line_format, 1); |
| 3634 | XSETFASTINT (buffer_local_flags.abbrev_mode, 2); |
| 3635 | XSETFASTINT (buffer_local_flags.overwrite_mode, 4); |
| 3636 | XSETFASTINT (buffer_local_flags.case_fold_search, 8); |
| 3637 | XSETFASTINT (buffer_local_flags.auto_fill_function, 0x10); |
| 3638 | XSETFASTINT (buffer_local_flags.selective_display, 0x20); |
| 3639 | #ifndef old |
| 3640 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, 0x40); |
| 3641 | #endif |
| 3642 | XSETFASTINT (buffer_local_flags.tab_width, 0x80); |
| 3643 | XSETFASTINT (buffer_local_flags.truncate_lines, 0x100); |
| 3644 | XSETFASTINT (buffer_local_flags.ctl_arrow, 0x200); |
| 3645 | XSETFASTINT (buffer_local_flags.fill_column, 0x400); |
| 3646 | XSETFASTINT (buffer_local_flags.left_margin, 0x800); |
| 3647 | XSETFASTINT (buffer_local_flags.abbrev_table, 0x1000); |
| 3648 | XSETFASTINT (buffer_local_flags.display_table, 0x2000); |
| 3649 | #ifdef DOS_NT |
| 3650 | XSETFASTINT (buffer_local_flags.buffer_file_type, 0x4000); |
| 3651 | /* Make this one a permanent local. */ |
| 3652 | buffer_permanent_local_flags |= 0x4000; |
| 3653 | #endif |
| 3654 | XSETFASTINT (buffer_local_flags.syntax_table, 0x8000); |
| 3655 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, 0x10000); |
| 3656 | XSETFASTINT (buffer_local_flags.category_table, 0x20000); |
| 3657 | XSETFASTINT (buffer_local_flags.direction_reversed, 0x40000); |
| 3658 | XSETFASTINT (buffer_local_flags.enable_multibyte_characters, 0x80000); |
| 3659 | /* Make this one a permanent local. */ |
| 3660 | buffer_permanent_local_flags |= 0x80000; |
| 3661 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, 0x100000); |
| 3662 | /* Make this one a permanent local. */ |
| 3663 | buffer_permanent_local_flags |= 0x100000; |
| 3664 | |
| 3665 | Vbuffer_alist = Qnil; |
| 3666 | current_buffer = 0; |
| 3667 | all_buffers = 0; |
| 3668 | |
| 3669 | QSFundamental = build_string ("Fundamental"); |
| 3670 | |
| 3671 | Qfundamental_mode = intern ("fundamental-mode"); |
| 3672 | buffer_defaults.major_mode = Qfundamental_mode; |
| 3673 | |
| 3674 | Qmode_class = intern ("mode-class"); |
| 3675 | |
| 3676 | Qprotected_field = intern ("protected-field"); |
| 3677 | |
| 3678 | Qpermanent_local = intern ("permanent-local"); |
| 3679 | |
| 3680 | Qkill_buffer_hook = intern ("kill-buffer-hook"); |
| 3681 | |
| 3682 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
| 3683 | |
| 3684 | /* super-magic invisible buffer */ |
| 3685 | Vbuffer_alist = Qnil; |
| 3686 | |
| 3687 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
| 3688 | } |
| 3689 | |
| 3690 | init_buffer () |
| 3691 | { |
| 3692 | char buf[MAXPATHLEN+1]; |
| 3693 | char *pwd; |
| 3694 | struct stat dotstat, pwdstat; |
| 3695 | Lisp_Object temp; |
| 3696 | int rc; |
| 3697 | |
| 3698 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
| 3699 | |
| 3700 | /* If PWD is accurate, use it instead of calling getwd. This is faster |
| 3701 | when PWD is right, and may avoid a fatal error. */ |
| 3702 | if ((pwd = getenv ("PWD")) != 0 && IS_DIRECTORY_SEP (*pwd) |
| 3703 | && stat (pwd, &pwdstat) == 0 |
| 3704 | && stat (".", &dotstat) == 0 |
| 3705 | && dotstat.st_ino == pwdstat.st_ino |
| 3706 | && dotstat.st_dev == pwdstat.st_dev |
| 3707 | && strlen (pwd) < MAXPATHLEN) |
| 3708 | strcpy (buf, pwd); |
| 3709 | else if (getwd (buf) == 0) |
| 3710 | fatal ("`getwd' failed: %s\n", buf); |
| 3711 | |
| 3712 | #ifndef VMS |
| 3713 | /* Maybe this should really use some standard subroutine |
| 3714 | whose definition is filename syntax dependent. */ |
| 3715 | rc = strlen (buf); |
| 3716 | if (!(IS_DIRECTORY_SEP (buf[rc - 1]))) |
| 3717 | { |
| 3718 | buf[rc] = DIRECTORY_SEP; |
| 3719 | buf[rc + 1] = '\0'; |
| 3720 | } |
| 3721 | #endif /* not VMS */ |
| 3722 | |
| 3723 | current_buffer->directory = build_string (buf); |
| 3724 | |
| 3725 | /* Add /: to the front of the name |
| 3726 | if it would otherwise be treated as magic. */ |
| 3727 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); |
| 3728 | if (! NILP (temp)) |
| 3729 | current_buffer->directory |
| 3730 | = concat2 (build_string ("/:"), current_buffer->directory); |
| 3731 | |
| 3732 | temp = get_minibuffer (0); |
| 3733 | XBUFFER (temp)->directory = current_buffer->directory; |
| 3734 | } |
| 3735 | |
| 3736 | /* initialize the buffer routines */ |
| 3737 | syms_of_buffer () |
| 3738 | { |
| 3739 | extern Lisp_Object Qdisabled; |
| 3740 | |
| 3741 | staticpro (&last_overlay_modification_hooks); |
| 3742 | last_overlay_modification_hooks |
| 3743 | = Fmake_vector (make_number (10), Qnil); |
| 3744 | |
| 3745 | staticpro (&Vbuffer_defaults); |
| 3746 | staticpro (&Vbuffer_local_symbols); |
| 3747 | staticpro (&Qfundamental_mode); |
| 3748 | staticpro (&Qmode_class); |
| 3749 | staticpro (&QSFundamental); |
| 3750 | staticpro (&Vbuffer_alist); |
| 3751 | staticpro (&Qprotected_field); |
| 3752 | staticpro (&Qpermanent_local); |
| 3753 | staticpro (&Qkill_buffer_hook); |
| 3754 | Qoverlayp = intern ("overlayp"); |
| 3755 | staticpro (&Qoverlayp); |
| 3756 | Qevaporate = intern ("evaporate"); |
| 3757 | staticpro (&Qevaporate); |
| 3758 | Qmodification_hooks = intern ("modification-hooks"); |
| 3759 | staticpro (&Qmodification_hooks); |
| 3760 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
| 3761 | staticpro (&Qinsert_in_front_hooks); |
| 3762 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
| 3763 | staticpro (&Qinsert_behind_hooks); |
| 3764 | Qget_file_buffer = intern ("get-file-buffer"); |
| 3765 | staticpro (&Qget_file_buffer); |
| 3766 | Qpriority = intern ("priority"); |
| 3767 | staticpro (&Qpriority); |
| 3768 | Qwindow = intern ("window"); |
| 3769 | staticpro (&Qwindow); |
| 3770 | Qbefore_string = intern ("before-string"); |
| 3771 | staticpro (&Qbefore_string); |
| 3772 | Qafter_string = intern ("after-string"); |
| 3773 | staticpro (&Qafter_string); |
| 3774 | Qfirst_change_hook = intern ("first-change-hook"); |
| 3775 | staticpro (&Qfirst_change_hook); |
| 3776 | Qbefore_change_functions = intern ("before-change-functions"); |
| 3777 | staticpro (&Qbefore_change_functions); |
| 3778 | Qafter_change_functions = intern ("after-change-functions"); |
| 3779 | staticpro (&Qafter_change_functions); |
| 3780 | |
| 3781 | Fput (Qprotected_field, Qerror_conditions, |
| 3782 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); |
| 3783 | Fput (Qprotected_field, Qerror_message, |
| 3784 | build_string ("Attempt to modify a protected field")); |
| 3785 | |
| 3786 | /* All these use DEFVAR_LISP_NOPRO because the slots in |
| 3787 | buffer_defaults will all be marked via Vbuffer_defaults. */ |
| 3788 | |
| 3789 | DEFVAR_LISP_NOPRO ("default-mode-line-format", |
| 3790 | &buffer_defaults.mode_line_format, |
| 3791 | "Default value of `mode-line-format' for buffers that don't override it.\n\ |
| 3792 | This is the same as (default-value 'mode-line-format)."); |
| 3793 | |
| 3794 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
| 3795 | &buffer_defaults.abbrev_mode, |
| 3796 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ |
| 3797 | This is the same as (default-value 'abbrev-mode)."); |
| 3798 | |
| 3799 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", |
| 3800 | &buffer_defaults.ctl_arrow, |
| 3801 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ |
| 3802 | This is the same as (default-value 'ctl-arrow)."); |
| 3803 | |
| 3804 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
| 3805 | &buffer_defaults.direction_reversed, |
| 3806 | "Default value of `direction_reversed' for buffers that do not override it.\n\ |
| 3807 | This is the same as (default-value 'direction-reversed)."); |
| 3808 | |
| 3809 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
| 3810 | &buffer_defaults.enable_multibyte_characters, |
| 3811 | "Default value of `enable-multibyte-characters' for buffers not overriding it.\n\ |
| 3812 | This is the same as (default-value 'enable-multibyte-characters)."); |
| 3813 | |
| 3814 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
| 3815 | &buffer_defaults.buffer_file_coding_system, |
| 3816 | "Default value of `buffer-file-coding-system' for buffers not overriding it.\n\ |
| 3817 | This is the same as (default-value 'buffer-file-coding-system)."); |
| 3818 | |
| 3819 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
| 3820 | &buffer_defaults.truncate_lines, |
| 3821 | "Default value of `truncate-lines' for buffers that do not override it.\n\ |
| 3822 | This is the same as (default-value 'truncate-lines)."); |
| 3823 | |
| 3824 | DEFVAR_LISP_NOPRO ("default-fill-column", |
| 3825 | &buffer_defaults.fill_column, |
| 3826 | "Default value of `fill-column' for buffers that do not override it.\n\ |
| 3827 | This is the same as (default-value 'fill-column)."); |
| 3828 | |
| 3829 | DEFVAR_LISP_NOPRO ("default-left-margin", |
| 3830 | &buffer_defaults.left_margin, |
| 3831 | "Default value of `left-margin' for buffers that do not override it.\n\ |
| 3832 | This is the same as (default-value 'left-margin)."); |
| 3833 | |
| 3834 | DEFVAR_LISP_NOPRO ("default-tab-width", |
| 3835 | &buffer_defaults.tab_width, |
| 3836 | "Default value of `tab-width' for buffers that do not override it.\n\ |
| 3837 | This is the same as (default-value 'tab-width)."); |
| 3838 | |
| 3839 | DEFVAR_LISP_NOPRO ("default-case-fold-search", |
| 3840 | &buffer_defaults.case_fold_search, |
| 3841 | "Default value of `case-fold-search' for buffers that don't override it.\n\ |
| 3842 | This is the same as (default-value 'case-fold-search)."); |
| 3843 | |
| 3844 | #ifdef DOS_NT |
| 3845 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
| 3846 | &buffer_defaults.buffer_file_type, |
| 3847 | "Default file type for buffers that do not override it.\n\ |
| 3848 | This is the same as (default-value 'buffer-file-type).\n\ |
| 3849 | The file type is nil for text, t for binary."); |
| 3850 | #endif |
| 3851 | |
| 3852 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
| 3853 | Qnil, 0); |
| 3854 | |
| 3855 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. |
| 3856 | But make-docfile finds it! |
| 3857 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
| 3858 | Qnil, |
| 3859 | "Template for displaying mode line for current buffer.\n\ |
| 3860 | Each buffer has its own value of this variable.\n\ |
| 3861 | Value may be a string, a symbol or a list or cons cell.\n\ |
| 3862 | For a symbol, its value is used (but it is ignored if t or nil).\n\ |
| 3863 | A string appearing directly as the value of a symbol is processed verbatim\n\ |
| 3864 | in that the %-constructs below are not recognized.\n\ |
| 3865 | For a list whose car is a symbol, the symbol's value is taken,\n\ |
| 3866 | and if that is non-nil, the cadr of the list is processed recursively.\n\ |
| 3867 | Otherwise, the caddr of the list (if there is one) is processed.\n\ |
| 3868 | For a list whose car is a string or list, each element is processed\n\ |
| 3869 | recursively and the results are effectively concatenated.\n\ |
| 3870 | For a list whose car is an integer, the cdr of the list is processed\n\ |
| 3871 | and padded (if the number is positive) or truncated (if negative)\n\ |
| 3872 | to the width specified by that number.\n\ |
| 3873 | A string is printed verbatim in the mode line except for %-constructs:\n\ |
| 3874 | (%-constructs are allowed when the string is the entire mode-line-format\n\ |
| 3875 | or when it is found in a cons-cell or a list)\n\ |
| 3876 | %b -- print buffer name. %f -- print visited file name.\n\ |
| 3877 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen.\n\ |
| 3878 | % means buffer is read-only and * means it is modified.\n\ |
| 3879 | For a modified read-only buffer, %* gives % and %+ gives *.\n\ |
| 3880 | %s -- print process status. %l -- print the current line number.\n\ |
| 3881 | %c -- print the current column number (this makes editing slower).\n\ |
| 3882 | To make the column number update correctly in all cases,\n\ |
| 3883 | `column-number-mode' must be non-nil.\n\ |
| 3884 | %p -- print percent of buffer above top of window, or Top, Bot or All.\n\ |
| 3885 | %P -- print percent of buffer above bottom of window, perhaps plus Top,\n\ |
| 3886 | or print Bottom or All.\n\ |
| 3887 | %n -- print Narrow if appropriate.\n\ |
| 3888 | %t -- print T if file is text, B if binary.\n\ |
| 3889 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
| 3890 | %% -- print %. %- -- print infinitely many dashes.\n\ |
| 3891 | Decimal digits after the % specify field width to which to pad."); |
| 3892 | */ |
| 3893 | |
| 3894 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
| 3895 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ |
| 3896 | nil here means use current buffer's major mode."); |
| 3897 | |
| 3898 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, |
| 3899 | make_number (Lisp_Symbol), |
| 3900 | "Symbol for current buffer's major mode."); |
| 3901 | |
| 3902 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, |
| 3903 | make_number (Lisp_String), |
| 3904 | "Pretty name of current buffer's major mode (a string)."); |
| 3905 | |
| 3906 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
| 3907 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
| 3908 | Automatically becomes buffer-local when set in any fashion."); |
| 3909 | |
| 3910 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, |
| 3911 | Qnil, |
| 3912 | "*Non-nil if searches should ignore case.\n\ |
| 3913 | Automatically becomes buffer-local when set in any fashion."); |
| 3914 | |
| 3915 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, |
| 3916 | make_number (Lisp_Int), |
| 3917 | "*Column beyond which automatic line-wrapping should happen.\n\ |
| 3918 | Automatically becomes buffer-local when set in any fashion."); |
| 3919 | |
| 3920 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, |
| 3921 | make_number (Lisp_Int), |
| 3922 | "*Column for the default indent-line-function to indent to.\n\ |
| 3923 | Linefeed indents to this column in Fundamental mode.\n\ |
| 3924 | Automatically becomes buffer-local when set in any fashion."); |
| 3925 | |
| 3926 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, |
| 3927 | make_number (Lisp_Int), |
| 3928 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
| 3929 | Automatically becomes buffer-local when set in any fashion."); |
| 3930 | |
| 3931 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
| 3932 | "*Non-nil means display control chars with uparrow.\n\ |
| 3933 | A value of nil means use backslash and octal digits.\n\ |
| 3934 | Automatically becomes buffer-local when set in any fashion.\n\ |
| 3935 | This variable does not apply to characters whose display is specified\n\ |
| 3936 | in the current display table (if there is one)."); |
| 3937 | |
| 3938 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
| 3939 | ¤t_buffer->enable_multibyte_characters, Qnil, |
| 3940 | "*Non-nil means the buffer contents are regarded as multi-byte form\n\ |
| 3941 | of characters, not a binary code. This affects the display, file I/O,\n\ |
| 3942 | and behaviors of various editing commands."); |
| 3943 | |
| 3944 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
| 3945 | ¤t_buffer->buffer_file_coding_system, Qnil, |
| 3946 | "Coding system to be used for encoding the buffer contents on saving.\n\ |
| 3947 | If it is nil, the buffer is saved without any code conversion unless\n\ |
| 3948 | some coding system is specified in file-coding-system-alist\n\ |
| 3949 | for the buffer file.\n\ |
| 3950 | \n\ |
| 3951 | This variable is never applied to a way of decoding\n\ |
| 3952 | a file while reading it."); |
| 3953 | |
| 3954 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
| 3955 | Qnil, |
| 3956 | "*Non-nil means lines in the buffer are displayed right to left."); |
| 3957 | |
| 3958 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
| 3959 | "*Non-nil means do not display continuation lines;\n\ |
| 3960 | give each line of text one screen line.\n\ |
| 3961 | Automatically becomes buffer-local when set in any fashion.\n\ |
| 3962 | \n\ |
| 3963 | Note that this is overridden by the variable\n\ |
| 3964 | `truncate-partial-width-windows' if that variable is non-nil\n\ |
| 3965 | and this buffer is not full-frame width."); |
| 3966 | |
| 3967 | #ifdef DOS_NT |
| 3968 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
| 3969 | Qnil, |
| 3970 | "Non-nil if the visited file is a binary file.\n\ |
| 3971 | This variable is meaningful on MS-DOG and Windows NT.\n\ |
| 3972 | On those systems, it is automatically local in every buffer.\n\ |
| 3973 | On other systems, this variable is normally always nil."); |
| 3974 | #endif |
| 3975 | |
| 3976 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
| 3977 | make_number (Lisp_String), |
| 3978 | "Name of default directory of current buffer. Should end with slash.\n\ |
| 3979 | Each buffer has its own value of this variable."); |
| 3980 | |
| 3981 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, |
| 3982 | Qnil, |
| 3983 | "Function called (if non-nil) to perform auto-fill.\n\ |
| 3984 | It is called after self-inserting a space or newline.\n\ |
| 3985 | Each buffer has its own value of this variable.\n\ |
| 3986 | NOTE: This variable is not a hook;\n\ |
| 3987 | its value may not be a list of functions."); |
| 3988 | |
| 3989 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, |
| 3990 | make_number (Lisp_String), |
| 3991 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
| 3992 | Each buffer has its own value of this variable."); |
| 3993 | |
| 3994 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
| 3995 | make_number (Lisp_String), |
| 3996 | "Abbreviated truename of file visited in current buffer, or nil if none.\n\ |
| 3997 | The truename of a file is calculated by `file-truename'\n\ |
| 3998 | and then abbreviated with `abbreviate-file-name'.\n\ |
| 3999 | Each buffer has its own value of this variable."); |
| 4000 | |
| 4001 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
| 4002 | ¤t_buffer->auto_save_file_name, |
| 4003 | make_number (Lisp_String), |
| 4004 | "Name of file for auto-saving current buffer,\n\ |
| 4005 | or nil if buffer should not be auto-saved.\n\ |
| 4006 | Each buffer has its own value of this variable."); |
| 4007 | |
| 4008 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
| 4009 | "Non-nil if this buffer is read-only.\n\ |
| 4010 | Each buffer has its own value of this variable."); |
| 4011 | |
| 4012 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
| 4013 | "Non-nil if this buffer's file has been backed up.\n\ |
| 4014 | Backing up is done before the first time the file is saved.\n\ |
| 4015 | Each buffer has its own value of this variable."); |
| 4016 | |
| 4017 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, |
| 4018 | make_number (Lisp_Int), |
| 4019 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
| 4020 | 0 initially.\n\ |
| 4021 | Each buffer has its own value of this variable."); |
| 4022 | |
| 4023 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, |
| 4024 | Qnil, |
| 4025 | "Non-nil enables selective display:\n\ |
| 4026 | Integer N as value means display only lines\n\ |
| 4027 | that start with less than n columns of space.\n\ |
| 4028 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ |
| 4029 | Then ^M's in the file are written into files as newlines.\n\n\ |
| 4030 | Automatically becomes buffer-local when set in any fashion."); |
| 4031 | |
| 4032 | #ifndef old |
| 4033 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
| 4034 | ¤t_buffer->selective_display_ellipses, |
| 4035 | Qnil, |
| 4036 | "t means display ... on previous line when a line is invisible.\n\ |
| 4037 | Automatically becomes buffer-local when set in any fashion."); |
| 4038 | #endif |
| 4039 | |
| 4040 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
| 4041 | "Non-nil if self-insertion should replace existing text.\n\ |
| 4042 | The value should be one of `overwrite-mode-textual',\n\ |
| 4043 | `overwrite-mode-binary', or nil.\n\ |
| 4044 | If it is `overwrite-mode-textual', self-insertion still\n\ |
| 4045 | inserts at the end of a line, and inserts when point is before a tab,\n\ |
| 4046 | until the tab is filled in.\n\ |
| 4047 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.\n\ |
| 4048 | Automatically becomes buffer-local when set in any fashion."); |
| 4049 | |
| 4050 | #if 0 /* The doc string is too long for some compilers, |
| 4051 | but make-docfile can find it in this comment. */ |
| 4052 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
| 4053 | Qnil, |
| 4054 | "Display table that controls display of the contents of current buffer.\n\ |
| 4055 | Automatically becomes buffer-local when set in any fashion.\n\ |
| 4056 | The display table is a char-table created with `make-display-table'.\n\ |
| 4057 | The ordinary char-table elements control how to display each possible text\n\ |
| 4058 | character. Each value should be a vector of characters or nil;\n\ |
| 4059 | nil means display the character in the default fashion.\n\ |
| 4060 | There are six extra slots to control the display of\n\ |
| 4061 | the end of a truncated screen line (extra-slot 0, a single character);\n\ |
| 4062 | the end of a continued line (extra-slot 1, a single character);\n\ |
| 4063 | the escape character used to display character codes in octal\n\ |
| 4064 | (extra-slot 2, a single character);\n\ |
| 4065 | the character used as an arrow for control characters (extra-slot 3,\n\ |
| 4066 | a single character);\n\ |
| 4067 | the decoration indicating the presence of invisible lines (extra-slot 4,\n\ |
| 4068 | a vector of characters);\n\ |
| 4069 | the character used to draw the border between side-by-side windows\n\ |
| 4070 | (extra-slot 5, a single character).\n\ |
| 4071 | See also the functions `display-table-slot' and `set-display-table-slot'.\n\ |
| 4072 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
| 4073 | Each window can have its own, overriding display table."); |
| 4074 | #endif |
| 4075 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
| 4076 | Qnil, 0); |
| 4077 | |
| 4078 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
| 4079 | "Don't ask."); |
| 4080 | */ |
| 4081 | DEFVAR_LISP ("before-change-function", &Vbefore_change_function, |
| 4082 | "If non-nil, a function to call before each text change (obsolete).\n\ |
| 4083 | Two arguments are passed to the function: the positions of\n\ |
| 4084 | the beginning and end of the range of old text to be changed.\n\ |
| 4085 | \(For an insertion, the beginning and end are at the same place.)\n\ |
| 4086 | No information is given about the length of the text after the change.\n\ |
| 4087 | \n\ |
| 4088 | Buffer changes made while executing the `before-change-function'\n\ |
| 4089 | don't call any before-change or after-change functions.\n\ |
| 4090 | That's because these variables are temporarily set to nil.\n\ |
| 4091 | As a result, a hook function cannot straightforwardly alter the value of\n\ |
| 4092 | these variables. See the Emacs Lisp manual for a way of\n\ |
| 4093 | accomplishing an equivalent result by using other variables.\n\n\ |
| 4094 | This variable is obsolete; use `before-change-functions' instead."); |
| 4095 | Vbefore_change_function = Qnil; |
| 4096 | |
| 4097 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, |
| 4098 | "If non-nil, a Function to call after each text change (obsolete).\n\ |
| 4099 | Three arguments are passed to the function: the positions of\n\ |
| 4100 | the beginning and end of the range of changed text,\n\ |
| 4101 | and the length of the pre-change text replaced by that range.\n\ |
| 4102 | \(For an insertion, the pre-change length is zero;\n\ |
| 4103 | for a deletion, that length is the number of characters deleted,\n\ |
| 4104 | and the post-change beginning and end are at the same place.)\n\ |
| 4105 | \n\ |
| 4106 | Buffer changes made while executing the `after-change-function'\n\ |
| 4107 | don't call any before-change or after-change functions.\n\ |
| 4108 | That's because these variables are temporarily set to nil.\n\ |
| 4109 | As a result, a hook function cannot straightforwardly alter the value of\n\ |
| 4110 | these variables. See the Emacs Lisp manual for a way of\n\ |
| 4111 | accomplishing an equivalent result by using other variables.\n\n\ |
| 4112 | This variable is obsolete; use `after-change-functions' instead."); |
| 4113 | Vafter_change_function = Qnil; |
| 4114 | |
| 4115 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
| 4116 | "List of functions to call before each text change.\n\ |
| 4117 | Two arguments are passed to each function: the positions of\n\ |
| 4118 | the beginning and end of the range of old text to be changed.\n\ |
| 4119 | \(For an insertion, the beginning and end are at the same place.)\n\ |
| 4120 | No information is given about the length of the text after the change.\n\ |
| 4121 | \n\ |
| 4122 | Buffer changes made while executing the `before-change-functions'\n\ |
| 4123 | don't call any before-change or after-change functions.\n\ |
| 4124 | That's because these variables are temporarily set to nil.\n\ |
| 4125 | As a result, a hook function cannot straightforwardly alter the value of\n\ |
| 4126 | these variables. See the Emacs Lisp manual for a way of\n\ |
| 4127 | accomplishing an equivalent result by using other variables."); |
| 4128 | Vbefore_change_functions = Qnil; |
| 4129 | |
| 4130 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
| 4131 | "List of function to call after each text change.\n\ |
| 4132 | Three arguments are passed to each function: the positions of\n\ |
| 4133 | the beginning and end of the range of changed text,\n\ |
| 4134 | and the length of the pre-change text replaced by that range.\n\ |
| 4135 | \(For an insertion, the pre-change length is zero;\n\ |
| 4136 | for a deletion, that length is the number of characters deleted,\n\ |
| 4137 | and the post-change beginning and end are at the same place.)\n\ |
| 4138 | \n\ |
| 4139 | Buffer changes made while executing the `after-change-functions'\n\ |
| 4140 | don't call any before-change or after-change functions.\n\ |
| 4141 | That's because these variables are temporarily set to nil.\n\ |
| 4142 | As a result, a hook function cannot straightforwardly alter the value of\n\ |
| 4143 | these variables. See the Emacs Lisp manual for a way of\n\ |
| 4144 | accomplishing an equivalent result by using other variables."); |
| 4145 | |
| 4146 | Vafter_change_functions = Qnil; |
| 4147 | |
| 4148 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
| 4149 | "A list of functions to call before changing a buffer which is unmodified.\n\ |
| 4150 | The functions are run using the `run-hooks' function."); |
| 4151 | Vfirst_change_hook = Qnil; |
| 4152 | |
| 4153 | #if 0 /* The doc string is too long for some compilers, |
| 4154 | but make-docfile can find it in this comment. */ |
| 4155 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
| 4156 | "List of undo entries in current buffer.\n\ |
| 4157 | Recent changes come first; older changes follow newer.\n\ |
| 4158 | \n\ |
| 4159 | An entry (BEG . END) represents an insertion which begins at\n\ |
| 4160 | position BEG and ends at position END.\n\ |
| 4161 | \n\ |
| 4162 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ |
| 4163 | from (abs POSITION). If POSITION is positive, point was at the front\n\ |
| 4164 | of the text being deleted; if negative, point was at the end.\n\ |
| 4165 | \n\ |
| 4166 | An entry (t HIGH . LOW) indicates that the buffer previously had\n\ |
| 4167 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions\n\ |
| 4168 | of the visited file's modification time, as of that time. If the\n\ |
| 4169 | modification time of the most recent save is different, this entry is\n\ |
| 4170 | obsolete.\n\ |
| 4171 | \n\ |
| 4172 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property\n\ |
| 4173 | was modified between BEG and END. PROPERTY is the property name,\n\ |
| 4174 | and VALUE is the old value.\n\ |
| 4175 | \n\ |
| 4176 | An entry (MARKER . DISTANCE) indicates that the marker MARKER\n\ |
| 4177 | was adjusted in position by the offset DISTANCE (an integer).\n\ |
| 4178 | \n\ |
| 4179 | An entry of the form POSITION indicates that point was at the buffer\n\ |
| 4180 | location given by the integer. Undoing an entry of this form places\n\ |
| 4181 | point at POSITION.\n\ |
| 4182 | \n\ |
| 4183 | nil marks undo boundaries. The undo command treats the changes\n\ |
| 4184 | between two undo boundaries as a single step to be undone.\n\ |
| 4185 | \n\ |
| 4186 | If the value of the variable is t, undo information is not recorded."); |
| 4187 | #endif |
| 4188 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
| 4189 | 0); |
| 4190 | |
| 4191 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
| 4192 | "Non-nil means the mark and region are currently active in this buffer.\n\ |
| 4193 | Automatically local in all buffers."); |
| 4194 | |
| 4195 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
| 4196 | "Non-nil means that Emacs should use caches to handle long lines more quickly.\n\ |
| 4197 | This variable is buffer-local, in all buffers.\n\ |
| 4198 | \n\ |
| 4199 | Normally, the line-motion functions work by scanning the buffer for\n\ |
| 4200 | newlines. Columnar operations (like move-to-column and\n\ |
| 4201 | compute-motion) also work by scanning the buffer, summing character\n\ |
| 4202 | widths as they go. This works well for ordinary text, but if the\n\ |
| 4203 | buffer's lines are very long (say, more than 500 characters), these\n\ |
| 4204 | motion functions will take longer to execute. Emacs may also take\n\ |
| 4205 | longer to update the display.\n\ |
| 4206 | \n\ |
| 4207 | If cache-long-line-scans is non-nil, these motion functions cache the\n\ |
| 4208 | results of their scans, and consult the cache to avoid rescanning\n\ |
| 4209 | regions of the buffer until the text is modified. The caches are most\n\ |
| 4210 | beneficial when they prevent the most searching---that is, when the\n\ |
| 4211 | buffer contains long lines and large regions of characters with the\n\ |
| 4212 | same, fixed screen width.\n\ |
| 4213 | \n\ |
| 4214 | When cache-long-line-scans is non-nil, processing short lines will\n\ |
| 4215 | become slightly slower (because of the overhead of consulting the\n\ |
| 4216 | cache), and the caches will use memory roughly proportional to the\n\ |
| 4217 | number of newlines and characters whose screen width varies.\n\ |
| 4218 | \n\ |
| 4219 | The caches require no explicit maintenance; their accuracy is\n\ |
| 4220 | maintained internally by the Emacs primitives. Enabling or disabling\n\ |
| 4221 | the cache should not affect the behavior of any of the motion\n\ |
| 4222 | functions; it should only affect their performance."); |
| 4223 | |
| 4224 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
| 4225 | "Value of point before the last series of scroll operations, or nil."); |
| 4226 | |
| 4227 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
| 4228 | "List of formats to use when saving this buffer.\n\ |
| 4229 | Formats are defined by `format-alist'. This variable is\n\ |
| 4230 | set when a file is visited. Automatically local in all buffers."); |
| 4231 | |
| 4232 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
| 4233 | ¤t_buffer->invisibility_spec, Qnil, |
| 4234 | "Invisibility spec of this buffer.\n\ |
| 4235 | The default is t, which means that text is invisible\n\ |
| 4236 | if it has a non-nil `invisible' property.\n\ |
| 4237 | If the value is a list, a text character is invisible if its `invisible'\n\ |
| 4238 | property is an element in that list.\n\ |
| 4239 | If an element is a cons cell of the form (PROP . ELLIPSIS),\n\ |
| 4240 | then characters with property value PROP are invisible,\n\ |
| 4241 | and they have an ellipsis as well if ELLIPSIS is non-nil."); |
| 4242 | |
| 4243 | DEFVAR_PER_BUFFER ("buffer-display-count", |
| 4244 | ¤t_buffer->display_count, Qnil, |
| 4245 | "A number incremented each time the buffer is displayed in a window."); |
| 4246 | |
| 4247 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
| 4248 | "*Non-nil means deactivate the mark when the buffer contents change.\n\ |
| 4249 | Non-nil also enables highlighting of the region whenever the mark is active.\n\ |
| 4250 | The variable `highlight-nonselected-windows' controls whether to highlight\n\ |
| 4251 | all windows or just the selected window."); |
| 4252 | Vtransient_mark_mode = Qnil; |
| 4253 | |
| 4254 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
| 4255 | "*Non-nil means disregard read-only status of buffers or characters.\n\ |
| 4256 | If the value is t, disregard `buffer-read-only' and all `read-only'\n\ |
| 4257 | text properties. If the value is a list, disregard `buffer-read-only'\n\ |
| 4258 | and disregard a `read-only' text property if the property value\n\ |
| 4259 | is a member of the list."); |
| 4260 | Vinhibit_read_only = Qnil; |
| 4261 | |
| 4262 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
| 4263 | "List of functions called with no args to query before killing a buffer."); |
| 4264 | Vkill_buffer_query_functions = Qnil; |
| 4265 | |
| 4266 | defsubr (&Sbuffer_live_p); |
| 4267 | defsubr (&Sbuffer_list); |
| 4268 | defsubr (&Sget_buffer); |
| 4269 | defsubr (&Sget_file_buffer); |
| 4270 | defsubr (&Sget_buffer_create); |
| 4271 | defsubr (&Smake_indirect_buffer); |
| 4272 | defsubr (&Sgenerate_new_buffer_name); |
| 4273 | defsubr (&Sbuffer_name); |
| 4274 | /*defsubr (&Sbuffer_number);*/ |
| 4275 | defsubr (&Sbuffer_file_name); |
| 4276 | defsubr (&Sbuffer_base_buffer); |
| 4277 | defsubr (&Sbuffer_local_variables); |
| 4278 | defsubr (&Sbuffer_modified_p); |
| 4279 | defsubr (&Sset_buffer_modified_p); |
| 4280 | defsubr (&Sbuffer_modified_tick); |
| 4281 | defsubr (&Srename_buffer); |
| 4282 | defsubr (&Sother_buffer); |
| 4283 | defsubr (&Sbuffer_disable_undo); |
| 4284 | defsubr (&Sbuffer_enable_undo); |
| 4285 | defsubr (&Skill_buffer); |
| 4286 | defsubr (&Serase_buffer); |
| 4287 | defsubr (&Sset_buffer_major_mode); |
| 4288 | defsubr (&Sswitch_to_buffer); |
| 4289 | defsubr (&Spop_to_buffer); |
| 4290 | defsubr (&Scurrent_buffer); |
| 4291 | defsubr (&Sset_buffer); |
| 4292 | defsubr (&Sbarf_if_buffer_read_only); |
| 4293 | defsubr (&Sbury_buffer); |
| 4294 | defsubr (&Skill_all_local_variables); |
| 4295 | |
| 4296 | defsubr (&Soverlayp); |
| 4297 | defsubr (&Smake_overlay); |
| 4298 | defsubr (&Sdelete_overlay); |
| 4299 | defsubr (&Smove_overlay); |
| 4300 | defsubr (&Soverlay_start); |
| 4301 | defsubr (&Soverlay_end); |
| 4302 | defsubr (&Soverlay_buffer); |
| 4303 | defsubr (&Soverlay_properties); |
| 4304 | defsubr (&Soverlays_at); |
| 4305 | defsubr (&Soverlays_in); |
| 4306 | defsubr (&Snext_overlay_change); |
| 4307 | defsubr (&Sprevious_overlay_change); |
| 4308 | defsubr (&Soverlay_recenter); |
| 4309 | defsubr (&Soverlay_lists); |
| 4310 | defsubr (&Soverlay_get); |
| 4311 | defsubr (&Soverlay_put); |
| 4312 | } |
| 4313 | |
| 4314 | keys_of_buffer () |
| 4315 | { |
| 4316 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); |
| 4317 | initial_define_key (control_x_map, 'k', "kill-buffer"); |
| 4318 | |
| 4319 | /* This must not be in syms_of_buffer, because Qdisabled is not |
| 4320 | initialized when that function gets called. */ |
| 4321 | Fput (intern ("erase-buffer"), Qdisabled, Qt); |
| 4322 | } |