| 1 | /* Buffer manipulation primitives for GNU Emacs. |
| 2 | Copyright (C) 1985, 1986, 1987, 1988, 1989 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 1, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 19 | |
| 20 | |
| 21 | #include <sys/param.h> |
| 22 | |
| 23 | #ifndef MAXPATHLEN |
| 24 | /* in 4.1, param.h fails to define this. */ |
| 25 | #define MAXPATHLEN 1024 |
| 26 | #endif /* not MAXPATHLEN */ |
| 27 | |
| 28 | #ifdef NULL |
| 29 | #undef NULL |
| 30 | #endif |
| 31 | #include "config.h" |
| 32 | #include "lisp.h" |
| 33 | #include "window.h" |
| 34 | #include "commands.h" |
| 35 | #include "buffer.h" |
| 36 | #include "syntax.h" |
| 37 | #include "indent.h" |
| 38 | |
| 39 | struct buffer *current_buffer; /* the current buffer */ |
| 40 | |
| 41 | /* First buffer in chain of all buffers (in reverse order of creation). |
| 42 | Threaded through ->next. */ |
| 43 | |
| 44 | struct buffer *all_buffers; |
| 45 | |
| 46 | /* This structure holds the default values of the buffer-local variables |
| 47 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. |
| 48 | The default value occupies the same slot in this structure |
| 49 | as an individual buffer's value occupies in that buffer. |
| 50 | Setting the default value also goes through the alist of buffers |
| 51 | and stores into each buffer that does not say it has a local value. */ |
| 52 | |
| 53 | struct buffer buffer_defaults; |
| 54 | |
| 55 | /* A Lisp_Object pointer to the above, used for staticpro */ |
| 56 | |
| 57 | static Lisp_Object Vbuffer_defaults; |
| 58 | |
| 59 | /* This structure marks which slots in a buffer have corresponding |
| 60 | default values in buffer_defaults. |
| 61 | Each such slot has a nonzero value in this structure. |
| 62 | The value has only one nonzero bit. |
| 63 | |
| 64 | When a buffer has its own local value for a slot, |
| 65 | the bit for that slot (found in the same slot in this structure) |
| 66 | is turned on in the buffer's local_var_flags slot. |
| 67 | |
| 68 | If a slot in this structure is -1, then even though there may |
| 69 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; |
| 70 | and the corresponding slot in buffer_defaults is not used. |
| 71 | |
| 72 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, |
| 73 | but there is a default value which is copied into each buffer. |
| 74 | |
| 75 | If a slot in this structure is negative, then even though there may |
| 76 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; |
| 77 | and the corresponding slot in buffer_defaults is not used. |
| 78 | |
| 79 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
| 80 | zero, that is a bug */ |
| 81 | |
| 82 | struct buffer buffer_local_flags; |
| 83 | |
| 84 | /* This structure holds the names of symbols whose values may be |
| 85 | buffer-local. It is indexed and accessed in the same way as the above. */ |
| 86 | |
| 87 | struct buffer buffer_local_symbols; |
| 88 | /* A Lisp_Object pointer to the above, used for staticpro */ |
| 89 | static Lisp_Object Vbuffer_local_symbols; |
| 90 | |
| 91 | /* Nonzero means don't allow modification of protected fields. */ |
| 92 | |
| 93 | int check_protected_fields; |
| 94 | |
| 95 | Lisp_Object Fset_buffer (); |
| 96 | |
| 97 | /* Alist of all buffer names vs the buffers. */ |
| 98 | /* This used to be a variable, but is no longer, |
| 99 | to prevent lossage due to user rplac'ing this alist or its elements. */ |
| 100 | Lisp_Object Vbuffer_alist; |
| 101 | |
| 102 | /* Functions to call before and after each text change. */ |
| 103 | Lisp_Object Vbefore_change_function; |
| 104 | Lisp_Object Vafter_change_function; |
| 105 | |
| 106 | /* Function to call before changing an unmodified buffer. */ |
| 107 | Lisp_Object Vfirst_change_function; |
| 108 | |
| 109 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
| 110 | |
| 111 | Lisp_Object Qprotected_field; |
| 112 | |
| 113 | Lisp_Object QSFundamental; /* A string "Fundamental" */ |
| 114 | |
| 115 | Lisp_Object Qkill_buffer_hook; |
| 116 | |
| 117 | /* For debugging; temporary. See set_buffer_internal. */ |
| 118 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ |
| 119 | |
| 120 | nsberror (spec) |
| 121 | Lisp_Object spec; |
| 122 | { |
| 123 | if (XTYPE (spec) == Lisp_String) |
| 124 | error ("No buffer named %s", XSTRING (spec)->data); |
| 125 | error ("Invalid buffer argument"); |
| 126 | } |
| 127 | \f |
| 128 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 0, 0, |
| 129 | "Return a list of all existing live buffers.") |
| 130 | () |
| 131 | { |
| 132 | return Fmapcar (Qcdr, Vbuffer_alist); |
| 133 | } |
| 134 | |
| 135 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
| 136 | "Return the buffer named NAME (a string).\n\ |
| 137 | If there is no live buffer named NAME, return nil.\n\ |
| 138 | NAME may also be a buffer; if so, the value is that buffer.") |
| 139 | (name) |
| 140 | register Lisp_Object name; |
| 141 | { |
| 142 | if (XTYPE (name) == Lisp_Buffer) |
| 143 | return name; |
| 144 | CHECK_STRING (name, 0); |
| 145 | |
| 146 | return Fcdr (Fassoc (name, Vbuffer_alist)); |
| 147 | } |
| 148 | |
| 149 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, |
| 150 | "Return the buffer visiting file FILENAME (a string).\n\ |
| 151 | If there is no such live buffer, return nil.") |
| 152 | (filename) |
| 153 | register Lisp_Object filename; |
| 154 | { |
| 155 | register Lisp_Object tail, buf, tem; |
| 156 | CHECK_STRING (filename, 0); |
| 157 | filename = Fexpand_file_name (filename, Qnil); |
| 158 | |
| 159 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr) |
| 160 | { |
| 161 | buf = Fcdr (XCONS (tail)->car); |
| 162 | if (XTYPE (buf) != Lisp_Buffer) continue; |
| 163 | if (XTYPE (XBUFFER (buf)->filename) != Lisp_String) continue; |
| 164 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
| 165 | if (!NULL (tem)) |
| 166 | return buf; |
| 167 | } |
| 168 | return Qnil; |
| 169 | } |
| 170 | |
| 171 | /* Incremented for each buffer created, to assign the buffer number. */ |
| 172 | int buffer_count; |
| 173 | |
| 174 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, |
| 175 | "Return the buffer named NAME, or create such a buffer and return it.\n\ |
| 176 | A new buffer is created if there is no live buffer named NAME.\n\ |
| 177 | If NAME is a buffer instead of a string, then it is the value returned.\n\ |
| 178 | The value is never nil.") |
| 179 | (name) |
| 180 | register Lisp_Object name; |
| 181 | { |
| 182 | register Lisp_Object buf, function, tem; |
| 183 | int count = specpdl_ptr - specpdl; |
| 184 | register struct buffer *b; |
| 185 | |
| 186 | buf = Fget_buffer (name); |
| 187 | if (!NULL (buf)) |
| 188 | return buf; |
| 189 | |
| 190 | b = (struct buffer *) malloc (sizeof (struct buffer)); |
| 191 | if (!b) |
| 192 | memory_full (); |
| 193 | |
| 194 | BUF_GAP_SIZE (b) = 20; |
| 195 | BUFFER_ALLOC (BUF_BEG_ADDR (b), BUF_GAP_SIZE (b)); |
| 196 | if (! BUF_BEG_ADDR (b)) |
| 197 | memory_full (); |
| 198 | |
| 199 | BUF_PT (b) = 1; |
| 200 | BUF_GPT (b) = 1; |
| 201 | BUF_BEGV (b) = 1; |
| 202 | BUF_ZV (b) = 1; |
| 203 | BUF_Z (b) = 1; |
| 204 | BUF_MODIFF (b) = 1; |
| 205 | |
| 206 | /* Put this on the chain of all buffers including killed ones. */ |
| 207 | b->next = all_buffers; |
| 208 | all_buffers = b; |
| 209 | |
| 210 | b->mark = Fmake_marker (); |
| 211 | /*b->number = make_number (++buffer_count);*/ |
| 212 | b->name = name; |
| 213 | if (XSTRING (name)->data[0] != ' ') |
| 214 | b->undo_list = Qnil; |
| 215 | else |
| 216 | b->undo_list = Qt; |
| 217 | |
| 218 | reset_buffer (b); |
| 219 | |
| 220 | /* Put this in the alist of all live buffers. */ |
| 221 | XSET (buf, Lisp_Buffer, b); |
| 222 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
| 223 | |
| 224 | b->mark = Fmake_marker (); |
| 225 | b->markers = Qnil; |
| 226 | b->name = name; |
| 227 | |
| 228 | function = buffer_defaults.major_mode; |
| 229 | if (NULL (function)) |
| 230 | { |
| 231 | tem = Fget (current_buffer->major_mode, Qmode_class); |
| 232 | if (EQ (tem, Qnil)) |
| 233 | function = current_buffer->major_mode; |
| 234 | } |
| 235 | |
| 236 | if (NULL (function) || EQ (function, Qfundamental_mode)) |
| 237 | return buf; |
| 238 | |
| 239 | /* To select a nonfundamental mode, |
| 240 | select the buffer temporarily and then call the mode function. */ |
| 241 | |
| 242 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 243 | |
| 244 | Fset_buffer (buf); |
| 245 | call0 (function); |
| 246 | |
| 247 | return unbind_to (count, buf); |
| 248 | } |
| 249 | |
| 250 | /* Reinitialize everything about a buffer except its name and contents. */ |
| 251 | |
| 252 | void |
| 253 | reset_buffer (b) |
| 254 | register struct buffer *b; |
| 255 | { |
| 256 | b->filename = Qnil; |
| 257 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
| 258 | b->modtime = 0; |
| 259 | b->save_modified = 1; |
| 260 | b->save_length = 0; |
| 261 | b->last_window_start = 1; |
| 262 | b->backed_up = Qnil; |
| 263 | b->auto_save_modified = 0; |
| 264 | b->auto_save_file_name = Qnil; |
| 265 | b->read_only = Qnil; |
| 266 | b->fieldlist = Qnil; |
| 267 | reset_buffer_local_variables(b); |
| 268 | } |
| 269 | |
| 270 | reset_buffer_local_variables(b) |
| 271 | register struct buffer *b; |
| 272 | { |
| 273 | register int offset; |
| 274 | |
| 275 | /* Reset the major mode to Fundamental, together with all the |
| 276 | things that depend on the major mode. |
| 277 | default-major-mode is handled at a higher level. |
| 278 | We ignore it here. */ |
| 279 | b->major_mode = Qfundamental_mode; |
| 280 | b->keymap = Qnil; |
| 281 | b->abbrev_table = Vfundamental_mode_abbrev_table; |
| 282 | b->mode_name = QSFundamental; |
| 283 | b->minor_modes = Qnil; |
| 284 | b->downcase_table = Vascii_downcase_table; |
| 285 | b->upcase_table = Vascii_upcase_table; |
| 286 | b->case_canon_table = Vascii_downcase_table; |
| 287 | b->case_eqv_table = Vascii_upcase_table; |
| 288 | #if 0 |
| 289 | b->sort_table = XSTRING (Vascii_sort_table); |
| 290 | b->folding_sort_table = XSTRING (Vascii_folding_sort_table); |
| 291 | #endif /* 0 */ |
| 292 | |
| 293 | /* Reset all per-buffer variables to their defaults. */ |
| 294 | b->local_var_alist = Qnil; |
| 295 | b->local_var_flags = 0; |
| 296 | |
| 297 | /* For each slot that has a default value, |
| 298 | copy that into the slot. */ |
| 299 | |
| 300 | for (offset = (char *)&buffer_local_flags.name - (char *)&buffer_local_flags; |
| 301 | offset < sizeof (struct buffer); |
| 302 | offset += sizeof (Lisp_Object)) /* sizeof int == sizeof Lisp_Object */ |
| 303 | if (*(int *)(offset + (char *) &buffer_local_flags) > 0 |
| 304 | || *(int *)(offset + (char *) &buffer_local_flags) == -2) |
| 305 | *(Lisp_Object *)(offset + (char *)b) = |
| 306 | *(Lisp_Object *)(offset + (char *)&buffer_defaults); |
| 307 | } |
| 308 | |
| 309 | DEFUN ("generate-new-buffer", Fgenerate_new_buffer, Sgenerate_new_buffer, |
| 310 | 1, 1, 0, |
| 311 | "Create and return a buffer with a name based on NAME.\n\ |
| 312 | If there is no live buffer named NAME, then one is created.\n\ |
| 313 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER\n\ |
| 314 | until an unused name is found, and then create a buffer.") |
| 315 | (name) |
| 316 | register Lisp_Object name; |
| 317 | { |
| 318 | register Lisp_Object gentemp, tem; |
| 319 | int count; |
| 320 | char number[10]; |
| 321 | |
| 322 | CHECK_STRING (name, 0); |
| 323 | |
| 324 | tem = Fget_buffer (name); |
| 325 | if (NULL (tem)) |
| 326 | return Fget_buffer_create (name); |
| 327 | |
| 328 | count = 1; |
| 329 | while (1) |
| 330 | { |
| 331 | sprintf (number, "<%d>", ++count); |
| 332 | gentemp = concat2 (name, build_string (number)); |
| 333 | tem = Fget_buffer (gentemp); |
| 334 | if (NULL (tem)) |
| 335 | return Fget_buffer_create (gentemp); |
| 336 | } |
| 337 | } |
| 338 | |
| 339 | \f |
| 340 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, |
| 341 | "Return the name of BUFFER, as a string.\n\ |
| 342 | Wyth no argument or nil as argument, return the name of the current buffer.") |
| 343 | (buffer) |
| 344 | register Lisp_Object buffer; |
| 345 | { |
| 346 | if (NULL (buffer)) |
| 347 | return current_buffer->name; |
| 348 | CHECK_BUFFER (buffer, 0); |
| 349 | return XBUFFER (buffer)->name; |
| 350 | } |
| 351 | |
| 352 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, |
| 353 | "Return name of file BUFFER is visiting, or nil if none.\n\ |
| 354 | No argument or nil as argument means use the current buffer.") |
| 355 | (buffer) |
| 356 | register Lisp_Object buffer; |
| 357 | { |
| 358 | if (NULL (buffer)) |
| 359 | return current_buffer->filename; |
| 360 | CHECK_BUFFER (buffer, 0); |
| 361 | return XBUFFER (buffer)->filename; |
| 362 | } |
| 363 | |
| 364 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
| 365 | Sbuffer_local_variables, 0, 1, 0, |
| 366 | "Return an alist of variables that are buffer-local in BUFFER.\n\ |
| 367 | Each element looks like (SYMBOL . VALUE) and describes one variable.\n\ |
| 368 | Note that storing new VALUEs in these elements doesn't change the variables.\n\ |
| 369 | No argument or nil as argument means use current buffer as BUFFER.") |
| 370 | (buffer) |
| 371 | register Lisp_Object buffer; |
| 372 | { |
| 373 | register struct buffer *buf; |
| 374 | register Lisp_Object val; |
| 375 | |
| 376 | if (NULL (buffer)) |
| 377 | buf = current_buffer; |
| 378 | else |
| 379 | { |
| 380 | CHECK_BUFFER (buffer, 0); |
| 381 | buf = XBUFFER (buffer); |
| 382 | } |
| 383 | |
| 384 | { |
| 385 | /* Reference each variable in the alist in our current buffer. |
| 386 | If inquiring about the current buffer, this gets the current values, |
| 387 | so store them into the alist so the alist is up to date. |
| 388 | If inquiring about some other buffer, this swaps out any values |
| 389 | for that buffer, making the alist up to date automatically. */ |
| 390 | register Lisp_Object tem; |
| 391 | for (tem = buf->local_var_alist; CONSP (tem); tem = XCONS (tem)->cdr) |
| 392 | { |
| 393 | Lisp_Object v1 = Fsymbol_value (XCONS (XCONS (tem)->car)->car); |
| 394 | if (buf == current_buffer) |
| 395 | XCONS (XCONS (tem)->car)->cdr = v1; |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | /* Make a copy of the alist, to return it. */ |
| 400 | val = Fcopy_alist (buf->local_var_alist); |
| 401 | |
| 402 | /* Add on all the variables stored in special slots. */ |
| 403 | { |
| 404 | register int offset, mask; |
| 405 | |
| 406 | for (offset = (char *)&buffer_local_symbols.name - (char *)&buffer_local_symbols; |
| 407 | offset < sizeof (struct buffer); |
| 408 | offset += (sizeof (int))) /* sizeof int == sizeof Lisp_Object */ |
| 409 | { |
| 410 | mask = *(int *)(offset + (char *) &buffer_local_flags); |
| 411 | if (mask == -1 || (buf->local_var_flags & mask)) |
| 412 | if (XTYPE (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols)) |
| 413 | == Lisp_Symbol) |
| 414 | val = Fcons (Fcons (*(Lisp_Object *)(offset + (char *)&buffer_local_symbols), |
| 415 | *(Lisp_Object *)(offset + (char *)buf)), |
| 416 | val); |
| 417 | } |
| 418 | } |
| 419 | return (val); |
| 420 | } |
| 421 | |
| 422 | \f |
| 423 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, |
| 424 | 0, 1, 0, |
| 425 | "Return t if BUFFER was modified since its file was last read or saved.\n\ |
| 426 | No argument or nil as argument means use current buffer as BUFFER.") |
| 427 | (buffer) |
| 428 | register Lisp_Object buffer; |
| 429 | { |
| 430 | register struct buffer *buf; |
| 431 | if (NULL (buffer)) |
| 432 | buf = current_buffer; |
| 433 | else |
| 434 | { |
| 435 | CHECK_BUFFER (buffer, 0); |
| 436 | buf = XBUFFER (buffer); |
| 437 | } |
| 438 | |
| 439 | return buf->save_modified < BUF_MODIFF (buf) ? Qt : Qnil; |
| 440 | } |
| 441 | |
| 442 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, |
| 443 | 1, 1, 0, |
| 444 | "Mark current buffer as modified or unmodified according to FLAG.\n\ |
| 445 | A non-nil FLAG means mark the buffer modified.") |
| 446 | (flag) |
| 447 | register Lisp_Object flag; |
| 448 | { |
| 449 | register int already; |
| 450 | register Lisp_Object fn; |
| 451 | |
| 452 | #ifdef CLASH_DETECTION |
| 453 | /* If buffer becoming modified, lock the file. |
| 454 | If buffer becoming unmodified, unlock the file. */ |
| 455 | |
| 456 | fn = current_buffer->filename; |
| 457 | if (!NULL (fn)) |
| 458 | { |
| 459 | already = current_buffer->save_modified < MODIFF; |
| 460 | if (!already && !NULL (flag)) |
| 461 | lock_file (fn); |
| 462 | else if (already && NULL (flag)) |
| 463 | unlock_file (fn); |
| 464 | } |
| 465 | #endif /* CLASH_DETECTION */ |
| 466 | |
| 467 | current_buffer->save_modified = NULL (flag) ? MODIFF : 0; |
| 468 | update_mode_lines++; |
| 469 | return flag; |
| 470 | } |
| 471 | |
| 472 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
| 473 | 0, 1, 0, |
| 474 | "Return BUFFER's tick counter, incremented for each change in text.\n\ |
| 475 | Each buffer has a tick counter which is incremented each time the text in\n\ |
| 476 | that buffer is changed. It wraps around occasionally.\n\ |
| 477 | No argument or nil as argument means use current buffer as BUFFER.") |
| 478 | (buffer) |
| 479 | register Lisp_Object buffer; |
| 480 | { |
| 481 | register struct buffer *buf; |
| 482 | if (NULL (buffer)) |
| 483 | buf = current_buffer; |
| 484 | else |
| 485 | { |
| 486 | CHECK_BUFFER (buffer, 0); |
| 487 | buf = XBUFFER (buffer); |
| 488 | } |
| 489 | |
| 490 | return make_number (BUF_MODIFF (buf)); |
| 491 | } |
| 492 | \f |
| 493 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 1, |
| 494 | "sRename buffer (to new name): ", |
| 495 | "Change current buffer's name to NEWNAME (a string).\n\ |
| 496 | It is an error if a buffer named NEWNAME already exists.\n\ |
| 497 | This does not change the name of the visited file (if any).") |
| 498 | (name) |
| 499 | register Lisp_Object name; |
| 500 | { |
| 501 | register Lisp_Object tem, buf; |
| 502 | |
| 503 | CHECK_STRING (name, 0); |
| 504 | tem = Fget_buffer (name); |
| 505 | if (!NULL (tem)) |
| 506 | error ("Buffer name \"%s\" is in use", XSTRING (name)->data); |
| 507 | |
| 508 | current_buffer->name = name; |
| 509 | XSET (buf, Lisp_Buffer, current_buffer); |
| 510 | Fsetcar (Frassq (buf, Vbuffer_alist), name); |
| 511 | if (NULL (current_buffer->filename) && !NULL (current_buffer->auto_save_file_name)) |
| 512 | call0 (intern ("rename-auto-save-file")); |
| 513 | return Qnil; |
| 514 | } |
| 515 | |
| 516 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 1, 0, |
| 517 | "Return most recently selected buffer other than BUFFER.\n\ |
| 518 | Buffers not visible in windows are preferred to visible buffers.\n\ |
| 519 | If no other buffer exists, the buffer `*scratch*' is returned.\n\ |
| 520 | If BUFFER is omitted or nil, some interesting buffer is returned.") |
| 521 | (buffer) |
| 522 | register Lisp_Object buffer; |
| 523 | { |
| 524 | register Lisp_Object tail, buf, notsogood, tem; |
| 525 | notsogood = Qnil; |
| 526 | |
| 527 | for (tail = Vbuffer_alist; !NULL (tail); tail = Fcdr (tail)) |
| 528 | { |
| 529 | buf = Fcdr (Fcar (tail)); |
| 530 | if (EQ (buf, buffer)) |
| 531 | continue; |
| 532 | if (XSTRING (XBUFFER (buf)->name)->data[0] == ' ') |
| 533 | continue; |
| 534 | tem = Fget_buffer_window (buf, Qnil); |
| 535 | if (NULL (tem)) |
| 536 | return buf; |
| 537 | if (NULL (notsogood)) |
| 538 | notsogood = buf; |
| 539 | } |
| 540 | if (!NULL (notsogood)) |
| 541 | return notsogood; |
| 542 | return Fget_buffer_create (build_string ("*scratch*")); |
| 543 | } |
| 544 | \f |
| 545 | DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, Sbuffer_disable_undo, 1,1, |
| 546 | 0, |
| 547 | "Make BUFFER stop keeping undo information.") |
| 548 | (buf) |
| 549 | register Lisp_Object buf; |
| 550 | { |
| 551 | CHECK_BUFFER (buf, 0); |
| 552 | XBUFFER (buf)->undo_list = Qt; |
| 553 | return Qnil; |
| 554 | } |
| 555 | |
| 556 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
| 557 | 0, 1, "", |
| 558 | "Start keeping undo information for buffer BUFFER.\n\ |
| 559 | No argument or nil as argument means do this for the current buffer.") |
| 560 | (buf) |
| 561 | register Lisp_Object buf; |
| 562 | { |
| 563 | register struct buffer *b; |
| 564 | register Lisp_Object buf1; |
| 565 | |
| 566 | if (NULL (buf)) |
| 567 | b = current_buffer; |
| 568 | else |
| 569 | { |
| 570 | buf1 = Fget_buffer (buf); |
| 571 | if (NULL (buf1)) nsberror (buf); |
| 572 | b = XBUFFER (buf1); |
| 573 | } |
| 574 | |
| 575 | if (EQ (b->undo_list, Qt)) |
| 576 | b->undo_list = Qnil; |
| 577 | |
| 578 | return Qnil; |
| 579 | } |
| 580 | |
| 581 | /* |
| 582 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ |
| 583 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ |
| 584 | The buffer being killed will be current while the hook is running.\n\ |
| 585 | See `kill-buffer'." |
| 586 | */ |
| 587 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", |
| 588 | "Kill the buffer BUFFER.\n\ |
| 589 | The argument may be a buffer or may be the name of a buffer.\n\ |
| 590 | An argument of nil means kill the current buffer.\n\n\ |
| 591 | Value is t if the buffer is actually killed, nil if user says no.\n\n\ |
| 592 | The value of `kill-buffer-hook' (which may be local to that buffer),\n\ |
| 593 | if not void, is a list of functions to be called, with no arguments,\n\ |
| 594 | before the buffer is actually killed. The buffer to be killed is current\n\ |
| 595 | when the hook functions are called.\n\n\ |
| 596 | Any processes that have this buffer as the `process-buffer' are killed\n\ |
| 597 | with `delete-process'.") |
| 598 | (bufname) |
| 599 | Lisp_Object bufname; |
| 600 | { |
| 601 | Lisp_Object buf; |
| 602 | register struct buffer *b; |
| 603 | register Lisp_Object tem; |
| 604 | register struct Lisp_Marker *m; |
| 605 | struct gcpro gcpro1, gcpro2; |
| 606 | |
| 607 | if (NULL (bufname)) |
| 608 | buf = Fcurrent_buffer (); |
| 609 | else |
| 610 | buf = Fget_buffer (bufname); |
| 611 | if (NULL (buf)) |
| 612 | nsberror (bufname); |
| 613 | |
| 614 | b = XBUFFER (buf); |
| 615 | |
| 616 | /* Query if the buffer is still modified. */ |
| 617 | if (INTERACTIVE && !NULL (b->filename) |
| 618 | && BUF_MODIFF (b) > b->save_modified) |
| 619 | { |
| 620 | GCPRO2 (buf, bufname); |
| 621 | tem = do_yes_or_no_p (format1 ("Buffer %s modified; kill anyway? ", |
| 622 | XSTRING (b->name)->data)); |
| 623 | UNGCPRO; |
| 624 | if (NULL (tem)) |
| 625 | return Qnil; |
| 626 | } |
| 627 | |
| 628 | /* Run kill-buffer hook with the buffer to be killed the current buffer. */ |
| 629 | { |
| 630 | register Lisp_Object val; |
| 631 | int count = specpdl_ptr - specpdl; |
| 632 | |
| 633 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); |
| 634 | set_buffer_internal (b); |
| 635 | call1 (Vrun_hooks, Qkill_buffer_hook); |
| 636 | unbind_to (count, Qnil); |
| 637 | } |
| 638 | |
| 639 | /* We have no more questions to ask. Verify that it is valid |
| 640 | to kill the buffer. This must be done after the questions |
| 641 | since anything can happen within do_yes_or_no_p. */ |
| 642 | |
| 643 | /* Don't kill the minibuffer now current. */ |
| 644 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) |
| 645 | return Qnil; |
| 646 | |
| 647 | if (NULL (b->name)) |
| 648 | return Qnil; |
| 649 | |
| 650 | /* Make this buffer not be current. |
| 651 | In the process, notice if this is the sole visible buffer |
| 652 | and give up if so. */ |
| 653 | if (b == current_buffer) |
| 654 | { |
| 655 | tem = Fother_buffer (buf); |
| 656 | Fset_buffer (tem); |
| 657 | if (b == current_buffer) |
| 658 | return Qnil; |
| 659 | } |
| 660 | |
| 661 | /* Now there is no question: we can kill the buffer. */ |
| 662 | |
| 663 | #ifdef CLASH_DETECTION |
| 664 | /* Unlock this buffer's file, if it is locked. */ |
| 665 | unlock_buffer (b); |
| 666 | #endif /* CLASH_DETECTION */ |
| 667 | |
| 668 | #ifdef subprocesses |
| 669 | kill_buffer_processes (buf); |
| 670 | #endif /* subprocesses */ |
| 671 | |
| 672 | tem = Vinhibit_quit; |
| 673 | Vinhibit_quit = Qt; |
| 674 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
| 675 | Freplace_buffer_in_windows (buf); |
| 676 | Vinhibit_quit = tem; |
| 677 | |
| 678 | /* Delete any auto-save file. */ |
| 679 | if (XTYPE (b->auto_save_file_name) == Lisp_String) |
| 680 | { |
| 681 | Lisp_Object tem; |
| 682 | tem = Fsymbol_value (intern ("delete-auto-save-files")); |
| 683 | if (! NULL (tem)) |
| 684 | unlink (XSTRING (b->auto_save_file_name)->data); |
| 685 | } |
| 686 | |
| 687 | /* Unchain all markers of this buffer |
| 688 | and leave them pointing nowhere. */ |
| 689 | for (tem = b->markers; !EQ (tem, Qnil); ) |
| 690 | { |
| 691 | m = XMARKER (tem); |
| 692 | m->buffer = 0; |
| 693 | tem = m->chain; |
| 694 | m->chain = Qnil; |
| 695 | } |
| 696 | b->markers = Qnil; |
| 697 | |
| 698 | b->name = Qnil; |
| 699 | BUFFER_FREE (BUF_BEG_ADDR (b)); |
| 700 | b->undo_list = Qnil; |
| 701 | |
| 702 | return Qt; |
| 703 | } |
| 704 | \f |
| 705 | /* Put the element for buffer BUF at the front of buffer-alist. |
| 706 | This is done when a buffer is selected "visibly". |
| 707 | It keeps buffer-alist in the order of recency of selection |
| 708 | so that other_buffer will return something nice. */ |
| 709 | |
| 710 | record_buffer (buf) |
| 711 | Lisp_Object buf; |
| 712 | { |
| 713 | register Lisp_Object link, prev; |
| 714 | |
| 715 | prev = Qnil; |
| 716 | for (link = Vbuffer_alist; CONSP (link); link = XCONS (link)->cdr) |
| 717 | { |
| 718 | if (EQ (XCONS (XCONS (link)->car)->cdr, buf)) |
| 719 | break; |
| 720 | prev = link; |
| 721 | } |
| 722 | |
| 723 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist) |
| 724 | but cannot use Fdelq here it that allows quitting. */ |
| 725 | |
| 726 | if (NULL (prev)) |
| 727 | Vbuffer_alist = XCONS (Vbuffer_alist)->cdr; |
| 728 | else |
| 729 | XCONS (prev)->cdr = XCONS (XCONS (prev)->cdr)->cdr; |
| 730 | |
| 731 | XCONS(link)->cdr = Vbuffer_alist; |
| 732 | Vbuffer_alist = link; |
| 733 | } |
| 734 | |
| 735 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
| 736 | "Select buffer BUFFER in the current window.\n\ |
| 737 | BUFFER may be a buffer or a buffer name.\n\ |
| 738 | Optional second arg NORECORD non-nil means\n\ |
| 739 | do not put this buffer at the front of the list of recently selected ones.\n\ |
| 740 | \n\ |
| 741 | WARNING: This is NOT the way to work on another buffer temporarily\n\ |
| 742 | within a Lisp program! Use `set-buffer' instead. That avoids messing with\n\ |
| 743 | the window-buffer correspondences.") |
| 744 | (bufname, norecord) |
| 745 | Lisp_Object bufname, norecord; |
| 746 | { |
| 747 | register Lisp_Object buf; |
| 748 | Lisp_Object tem; |
| 749 | |
| 750 | if (EQ (minibuf_window, selected_window)) |
| 751 | error ("Cannot switch buffers in minibuffer window"); |
| 752 | tem = Fwindow_dedicated_p (selected_window); |
| 753 | if (!NULL (tem)) |
| 754 | error ("Cannot switch buffers in a dedicated window"); |
| 755 | |
| 756 | if (NULL (bufname)) |
| 757 | buf = Fother_buffer (Fcurrent_buffer ()); |
| 758 | else |
| 759 | buf = Fget_buffer_create (bufname); |
| 760 | Fset_buffer (buf); |
| 761 | if (NULL (norecord)) |
| 762 | record_buffer (buf); |
| 763 | |
| 764 | Fset_window_buffer (EQ (selected_window, minibuf_window) |
| 765 | ? Fnext_window (minibuf_window, Qnil) : selected_window, |
| 766 | buf); |
| 767 | |
| 768 | return Qnil; |
| 769 | } |
| 770 | |
| 771 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 2, 0, |
| 772 | "Select buffer BUFFER in some window, preferably a different one.\n\ |
| 773 | If BUFFER is nil, then some other buffer is chosen.\n\ |
| 774 | If `pop-up-windows' is non-nil, windows can be split to do this.\n\ |
| 775 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another\n\ |
| 776 | window even if BUFFER is already visible in the selected window.") |
| 777 | (bufname, other) |
| 778 | Lisp_Object bufname, other; |
| 779 | { |
| 780 | register Lisp_Object buf; |
| 781 | if (NULL (bufname)) |
| 782 | buf = Fother_buffer (Fcurrent_buffer ()); |
| 783 | else |
| 784 | buf = Fget_buffer_create (bufname); |
| 785 | Fset_buffer (buf); |
| 786 | record_buffer (buf); |
| 787 | Fselect_window (Fdisplay_buffer (buf, other)); |
| 788 | return Qnil; |
| 789 | } |
| 790 | |
| 791 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
| 792 | "Return the current buffer as a Lisp object.") |
| 793 | () |
| 794 | { |
| 795 | register Lisp_Object buf; |
| 796 | XSET (buf, Lisp_Buffer, current_buffer); |
| 797 | return buf; |
| 798 | } |
| 799 | \f |
| 800 | /* Set the current buffer to b */ |
| 801 | |
| 802 | void |
| 803 | set_buffer_internal (b) |
| 804 | register struct buffer *b; |
| 805 | { |
| 806 | register struct buffer *old_buf; |
| 807 | register Lisp_Object tail, valcontents; |
| 808 | enum Lisp_Type tem; |
| 809 | |
| 810 | if (current_buffer == b) |
| 811 | return; |
| 812 | |
| 813 | windows_or_buffers_changed = 1; |
| 814 | old_buf = current_buffer; |
| 815 | current_buffer = b; |
| 816 | last_known_column_point = -1; /* invalidate indentation cache */ |
| 817 | |
| 818 | /* Look down buffer's list of local Lisp variables |
| 819 | to find and update any that forward into C variables. */ |
| 820 | |
| 821 | for (tail = b->local_var_alist; !NULL (tail); tail = XCONS (tail)->cdr) |
| 822 | { |
| 823 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; |
| 824 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value |
| 825 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) |
| 826 | && (tem = XTYPE (XCONS (valcontents)->car), |
| 827 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd |
| 828 | || tem == Lisp_Objfwd))) |
| 829 | /* Just reference the variable |
| 830 | to cause it to become set for this buffer. */ |
| 831 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); |
| 832 | } |
| 833 | |
| 834 | /* Do the same with any others that were local to the previous buffer */ |
| 835 | |
| 836 | if (old_buf) |
| 837 | for (tail = old_buf->local_var_alist; !NULL (tail); tail = XCONS (tail)->cdr) |
| 838 | { |
| 839 | valcontents = XSYMBOL (XCONS (XCONS (tail)->car)->car)->value; |
| 840 | if ((XTYPE (valcontents) == Lisp_Buffer_Local_Value |
| 841 | || XTYPE (valcontents) == Lisp_Some_Buffer_Local_Value) |
| 842 | && (tem = XTYPE (XCONS (valcontents)->car), |
| 843 | (tem == Lisp_Boolfwd || tem == Lisp_Intfwd |
| 844 | || tem == Lisp_Objfwd))) |
| 845 | /* Just reference the variable |
| 846 | to cause it to become set for this buffer. */ |
| 847 | Fsymbol_value (XCONS (XCONS (tail)->car)->car); |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
| 852 | "Make the buffer BUFFER current for editing operations.\n\ |
| 853 | BUFFER may be a buffer or the name of an existing buffer.\n\ |
| 854 | See also `save-excursion' when you want to make a buffer current temporarily.\n\ |
| 855 | This function does not display the buffer, so its effect ends\n\ |
| 856 | when the current command terminates.\n\ |
| 857 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.") |
| 858 | (bufname) |
| 859 | register Lisp_Object bufname; |
| 860 | { |
| 861 | register Lisp_Object buffer; |
| 862 | buffer = Fget_buffer (bufname); |
| 863 | if (NULL (buffer)) |
| 864 | nsberror (bufname); |
| 865 | if (NULL (XBUFFER (buffer)->name)) |
| 866 | error ("Selecting deleted buffer"); |
| 867 | set_buffer_internal (XBUFFER (buffer)); |
| 868 | return buffer; |
| 869 | } |
| 870 | \f |
| 871 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, |
| 872 | Sbarf_if_buffer_read_only, 0, 0, 0, |
| 873 | "Signal a `buffer-read-only' error if the current buffer is read-only.") |
| 874 | () |
| 875 | { |
| 876 | while (!NULL (current_buffer->read_only)) |
| 877 | Fsignal (Qbuffer_read_only, (Fcons (Fcurrent_buffer (), Qnil))); |
| 878 | return Qnil; |
| 879 | } |
| 880 | |
| 881 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", |
| 882 | "Put BUFFER at the end of the list of all buffers.\n\ |
| 883 | There it is the least likely candidate for `other-buffer' to return;\n\ |
| 884 | thus, the least likely buffer for \\[switch-to-buffer] to select by default.") |
| 885 | (buf) |
| 886 | register Lisp_Object buf; |
| 887 | { |
| 888 | register Lisp_Object aelt, link; |
| 889 | |
| 890 | if (NULL (buf)) |
| 891 | { |
| 892 | XSET (buf, Lisp_Buffer, current_buffer); |
| 893 | Fswitch_to_buffer (Fother_buffer (buf), Qnil); |
| 894 | } |
| 895 | else |
| 896 | { |
| 897 | Lisp_Object buf1; |
| 898 | |
| 899 | buf1 = Fget_buffer (buf); |
| 900 | if (NULL (buf1)) |
| 901 | nsberror (buf); |
| 902 | buf = buf1; |
| 903 | } |
| 904 | |
| 905 | aelt = Frassq (buf, Vbuffer_alist); |
| 906 | link = Fmemq (aelt, Vbuffer_alist); |
| 907 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); |
| 908 | XCONS (link)->cdr = Qnil; |
| 909 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
| 910 | return Qnil; |
| 911 | } |
| 912 | \f |
| 913 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, 0, |
| 914 | "Delete the entire contents of the current buffer.\n\ |
| 915 | Any clipping restriction in effect (see `narrow-to-buffer') is removed,\n\ |
| 916 | so the buffer is truly empty after this.") |
| 917 | () |
| 918 | { |
| 919 | Fwiden (); |
| 920 | del_range (BEG, Z); |
| 921 | current_buffer->last_window_start = 1; |
| 922 | /* Prevent warnings, or suspension of auto saving, that would happen |
| 923 | if future size is less than past size. Use of erase-buffer |
| 924 | implies that the future text is not really related to the past text. */ |
| 925 | XFASTINT (current_buffer->save_length) = 0; |
| 926 | return Qnil; |
| 927 | } |
| 928 | |
| 929 | validate_region (b, e) |
| 930 | register Lisp_Object *b, *e; |
| 931 | { |
| 932 | register int i; |
| 933 | |
| 934 | CHECK_NUMBER_COERCE_MARKER (*b, 0); |
| 935 | CHECK_NUMBER_COERCE_MARKER (*e, 1); |
| 936 | |
| 937 | if (XINT (*b) > XINT (*e)) |
| 938 | { |
| 939 | i = XFASTINT (*b); /* This is legit even if *b is < 0 */ |
| 940 | *b = *e; |
| 941 | XFASTINT (*e) = i; /* because this is all we do with i. */ |
| 942 | } |
| 943 | |
| 944 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) |
| 945 | && XINT (*e) <= ZV)) |
| 946 | args_out_of_range (*b, *e); |
| 947 | } |
| 948 | \f |
| 949 | Lisp_Object |
| 950 | list_buffers_1 (files) |
| 951 | Lisp_Object files; |
| 952 | { |
| 953 | register Lisp_Object tail, tem, buf; |
| 954 | Lisp_Object col1, col2, col3, minspace; |
| 955 | register struct buffer *old = current_buffer, *b; |
| 956 | int desired_point = 0; |
| 957 | Lisp_Object other_file_symbol; |
| 958 | |
| 959 | other_file_symbol = intern ("list-buffers-directory"); |
| 960 | |
| 961 | XFASTINT (col1) = 19; |
| 962 | XFASTINT (col2) = 25; |
| 963 | XFASTINT (col3) = 40; |
| 964 | XFASTINT (minspace) = 1; |
| 965 | |
| 966 | Fset_buffer (Vstandard_output); |
| 967 | |
| 968 | tail = intern ("Buffer-menu-mode"); |
| 969 | if (!EQ (tail, current_buffer->major_mode) |
| 970 | && (tem = Ffboundp (tail), !NULL (tem))) |
| 971 | call0 (tail); |
| 972 | Fbuffer_disable_undo (Vstandard_output); |
| 973 | current_buffer->read_only = Qnil; |
| 974 | |
| 975 | write_string ("\ |
| 976 | MR Buffer Size Mode File\n\ |
| 977 | -- ------ ---- ---- ----\n", -1); |
| 978 | |
| 979 | for (tail = Vbuffer_alist; !NULL (tail); tail = Fcdr (tail)) |
| 980 | { |
| 981 | buf = Fcdr (Fcar (tail)); |
| 982 | b = XBUFFER (buf); |
| 983 | /* Don't mention the minibuffers. */ |
| 984 | if (XSTRING (b->name)->data[0] == ' ') |
| 985 | continue; |
| 986 | /* Optionally don't mention buffers that lack files. */ |
| 987 | if (!NULL (files) && NULL (b->filename)) |
| 988 | continue; |
| 989 | /* Identify the current buffer. */ |
| 990 | if (b == old) |
| 991 | desired_point = point; |
| 992 | write_string (b == old ? "." : " ", -1); |
| 993 | /* Identify modified buffers */ |
| 994 | write_string (BUF_MODIFF (b) > b->save_modified ? "*" : " ", -1); |
| 995 | write_string (NULL (b->read_only) ? " " : "% ", -1); |
| 996 | Fprinc (b->name, Qnil); |
| 997 | Findent_to (col1, make_number (2)); |
| 998 | XFASTINT (tem) = BUF_Z (b) - BUF_BEG (b); |
| 999 | Fprin1 (tem, Qnil); |
| 1000 | Findent_to (col2, minspace); |
| 1001 | Fprinc (b->mode_name, Qnil); |
| 1002 | Findent_to (col3, minspace); |
| 1003 | |
| 1004 | if (!NULL (b->filename)) |
| 1005 | Fprinc (b->filename, Qnil); |
| 1006 | else |
| 1007 | { |
| 1008 | /* No visited file; check local value of list-buffers-directory. */ |
| 1009 | Lisp_Object tem; |
| 1010 | set_buffer_internal (b); |
| 1011 | tem = Fboundp (other_file_symbol); |
| 1012 | if (!NULL (tem)) |
| 1013 | { |
| 1014 | tem = Fsymbol_value (other_file_symbol); |
| 1015 | Fset_buffer (Vstandard_output); |
| 1016 | if (XTYPE (tem) == Lisp_String) |
| 1017 | Fprinc (tem, Qnil); |
| 1018 | } |
| 1019 | else |
| 1020 | Fset_buffer (Vstandard_output); |
| 1021 | } |
| 1022 | write_string ("\n", -1); |
| 1023 | } |
| 1024 | |
| 1025 | current_buffer->read_only = Qt; |
| 1026 | set_buffer_internal (old); |
| 1027 | /* Foo. This doesn't work since temp_output_buffer_show sets point to 1 |
| 1028 | if (desired_point) |
| 1029 | XBUFFER (Vstandard_output)->text.pointloc = desired_point; |
| 1030 | */ |
| 1031 | return Qnil; |
| 1032 | } |
| 1033 | |
| 1034 | DEFUN ("list-buffers", Flist_buffers, Slist_buffers, 0, 1, "P", |
| 1035 | "Display a list of names of existing buffers.\n\ |
| 1036 | The list is displayed in a buffer named `*Buffer List*'.\n\ |
| 1037 | Note that buffers with names starting with spaces are omitted.\n\ |
| 1038 | Non-null optional arg FILES-ONLY means mention only file buffers.\n\ |
| 1039 | \n\ |
| 1040 | The M column contains a * for buffers that are modified.\n\ |
| 1041 | The R column contains a % for buffers that are read-only.") |
| 1042 | (files) |
| 1043 | Lisp_Object files; |
| 1044 | { |
| 1045 | internal_with_output_to_temp_buffer ("*Buffer List*", |
| 1046 | list_buffers_1, files); |
| 1047 | return Qnil; |
| 1048 | } |
| 1049 | |
| 1050 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
| 1051 | 0, 0, 0, |
| 1052 | "Switch to Fundamental mode by killing current buffer's local variables.\n\ |
| 1053 | Most local variable bindings are eliminated so that the default values\n\ |
| 1054 | become effective once more. Also, the syntax table is set from\n\ |
| 1055 | `standard-syntax-table', the local keymap is set to nil,\n\ |
| 1056 | and the abbrev table from `fundamental-mode-abbrev-table'.\n\ |
| 1057 | This function also forces redisplay of the mode line.\n\ |
| 1058 | \n\ |
| 1059 | Every function to select a new major mode starts by\n\ |
| 1060 | calling this function.\n\n\ |
| 1061 | As a special exception, local variables whose names have\n\ |
| 1062 | a non-nil `permanent-local' property are not eliminated by this function.") |
| 1063 | () |
| 1064 | { |
| 1065 | register Lisp_Object alist, sym, tem; |
| 1066 | Lisp_Object oalist; |
| 1067 | oalist = current_buffer->local_var_alist; |
| 1068 | |
| 1069 | /* Make sure no local variables remain set up with this buffer |
| 1070 | for their current values. */ |
| 1071 | |
| 1072 | for (alist = oalist; !NULL (alist); alist = XCONS (alist)->cdr) |
| 1073 | { |
| 1074 | sym = XCONS (XCONS (alist)->car)->car; |
| 1075 | |
| 1076 | /* Need not do anything if some other buffer's binding is now encached. */ |
| 1077 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car; |
| 1078 | if (XBUFFER (tem) == current_buffer) |
| 1079 | { |
| 1080 | /* Symbol is set up for this buffer's old local value. |
| 1081 | Set it up for the current buffer with the default value. */ |
| 1082 | |
| 1083 | tem = XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->cdr; |
| 1084 | XCONS (tem)->car = tem; |
| 1085 | XCONS (XCONS (XSYMBOL (sym)->value)->cdr)->car = Fcurrent_buffer (); |
| 1086 | store_symval_forwarding (sym, XCONS (XSYMBOL (sym)->value)->car, |
| 1087 | XCONS (tem)->cdr); |
| 1088 | } |
| 1089 | } |
| 1090 | |
| 1091 | /* Actually eliminate all local bindings of this buffer. */ |
| 1092 | |
| 1093 | reset_buffer_local_variables (current_buffer); |
| 1094 | |
| 1095 | /* Redisplay mode lines; we are changing major mode. */ |
| 1096 | |
| 1097 | update_mode_lines++; |
| 1098 | |
| 1099 | /* Any which are supposed to be permanent, |
| 1100 | make local again, with the same values they had. */ |
| 1101 | |
| 1102 | for (alist = oalist; !NULL (alist); alist = XCONS (alist)->cdr) |
| 1103 | { |
| 1104 | sym = XCONS (XCONS (alist)->car)->car; |
| 1105 | tem = Fget (sym, Qpermanent_local); |
| 1106 | if (! NULL (tem)) |
| 1107 | Fmake_local_variable (sym, XCONS (XCONS (alist)->car)->cdr); |
| 1108 | } |
| 1109 | |
| 1110 | /* Force mode-line redisplay. Useful here because all major mode |
| 1111 | commands call this function. */ |
| 1112 | update_mode_lines++; |
| 1113 | |
| 1114 | return Qnil; |
| 1115 | } |
| 1116 | \f |
| 1117 | DEFUN ("region-fields", Fregion_fields, Sregion_fields, 2, 4, "", |
| 1118 | "Return list of fields overlapping a given portion of a buffer.\n\ |
| 1119 | The portion is specified by arguments START, END and BUFFER.\n\ |
| 1120 | BUFFER defaults to the current buffer.\n\ |
| 1121 | Optional 4th arg ERROR-CHECK non nil means just report an error\n\ |
| 1122 | if any protected fields overlap this portion.") |
| 1123 | (start, end, buffer, error_check) |
| 1124 | Lisp_Object start, end, buffer, error_check; |
| 1125 | { |
| 1126 | register int start_loc, end_loc; |
| 1127 | Lisp_Object fieldlist; |
| 1128 | Lisp_Object collector; |
| 1129 | |
| 1130 | if (NULL (buffer)) |
| 1131 | fieldlist = current_buffer->fieldlist; |
| 1132 | else |
| 1133 | { |
| 1134 | CHECK_BUFFER (buffer, 1); |
| 1135 | fieldlist = XBUFFER (buffer)->fieldlist; |
| 1136 | } |
| 1137 | |
| 1138 | CHECK_NUMBER_COERCE_MARKER (start, 2); |
| 1139 | start_loc = XINT (start); |
| 1140 | |
| 1141 | CHECK_NUMBER_COERCE_MARKER (end, 2); |
| 1142 | end_loc = XINT (end); |
| 1143 | |
| 1144 | collector = Qnil; |
| 1145 | |
| 1146 | while (XTYPE (fieldlist) == Lisp_Cons) |
| 1147 | { |
| 1148 | register Lisp_Object field; |
| 1149 | register int field_start, field_end; |
| 1150 | |
| 1151 | field = XCONS (fieldlist)->car; |
| 1152 | field_start = marker_position (FIELD_START_MARKER (field)) - 1; |
| 1153 | field_end = marker_position (FIELD_END_MARKER (field)); |
| 1154 | |
| 1155 | if ((start_loc < field_start && end_loc > field_start) |
| 1156 | || (start_loc >= field_start && start_loc < field_end)) |
| 1157 | { |
| 1158 | if (!NULL (error_check)) |
| 1159 | { |
| 1160 | if (!NULL (FIELD_PROTECTED_FLAG (field))) |
| 1161 | { |
| 1162 | struct gcpro gcpro1; |
| 1163 | GCPRO1 (fieldlist); |
| 1164 | Fsignal (Qprotected_field, Fcons (field, Qnil)); |
| 1165 | UNGCPRO; |
| 1166 | } |
| 1167 | } |
| 1168 | else |
| 1169 | collector = Fcons (field, collector); |
| 1170 | } |
| 1171 | |
| 1172 | fieldlist = XCONS (fieldlist)->cdr; |
| 1173 | } |
| 1174 | |
| 1175 | return collector; |
| 1176 | } |
| 1177 | \f |
| 1178 | init_buffer_once () |
| 1179 | { |
| 1180 | register Lisp_Object tem; |
| 1181 | |
| 1182 | /* Make sure all markable slots in buffer_defaults |
| 1183 | are initialized reasonably, so mark_buffer won't choke. */ |
| 1184 | reset_buffer (&buffer_defaults); |
| 1185 | reset_buffer (&buffer_local_symbols); |
| 1186 | XSET (Vbuffer_defaults, Lisp_Buffer, &buffer_defaults); |
| 1187 | XSET (Vbuffer_local_symbols, Lisp_Buffer, &buffer_local_symbols); |
| 1188 | |
| 1189 | /* Set up the default values of various buffer slots. */ |
| 1190 | /* Must do these before making the first buffer! */ |
| 1191 | |
| 1192 | /* real setup is done in loaddefs.el */ |
| 1193 | buffer_defaults.mode_line_format = build_string ("%-"); |
| 1194 | buffer_defaults.abbrev_mode = Qnil; |
| 1195 | buffer_defaults.overwrite_mode = Qnil; |
| 1196 | buffer_defaults.case_fold_search = Qt; |
| 1197 | buffer_defaults.auto_fill_function = Qnil; |
| 1198 | buffer_defaults.selective_display = Qnil; |
| 1199 | #ifndef old |
| 1200 | buffer_defaults.selective_display_ellipses = Qt; |
| 1201 | #endif |
| 1202 | buffer_defaults.abbrev_table = Qnil; |
| 1203 | buffer_defaults.display_table = Qnil; |
| 1204 | buffer_defaults.fieldlist = Qnil; |
| 1205 | buffer_defaults.undo_list = Qnil; |
| 1206 | |
| 1207 | XFASTINT (buffer_defaults.tab_width) = 8; |
| 1208 | buffer_defaults.truncate_lines = Qnil; |
| 1209 | buffer_defaults.ctl_arrow = Qt; |
| 1210 | |
| 1211 | XFASTINT (buffer_defaults.fill_column) = 70; |
| 1212 | XFASTINT (buffer_defaults.left_margin) = 0; |
| 1213 | |
| 1214 | /* Assign the local-flags to the slots that have default values. |
| 1215 | The local flag is a bit that is used in the buffer |
| 1216 | to say that it has its own local value for the slot. |
| 1217 | The local flag bits are in the local_var_flags slot of the buffer. */ |
| 1218 | |
| 1219 | /* Nothing can work if this isn't true */ |
| 1220 | if (sizeof (int) != sizeof (Lisp_Object)) abort (); |
| 1221 | |
| 1222 | /* 0 means not a lisp var, -1 means always local, else mask */ |
| 1223 | bzero (&buffer_local_flags, sizeof buffer_local_flags); |
| 1224 | XFASTINT (buffer_local_flags.filename) = -1; |
| 1225 | XFASTINT (buffer_local_flags.directory) = -1; |
| 1226 | XFASTINT (buffer_local_flags.backed_up) = -1; |
| 1227 | XFASTINT (buffer_local_flags.save_length) = -1; |
| 1228 | XFASTINT (buffer_local_flags.auto_save_file_name) = -1; |
| 1229 | XFASTINT (buffer_local_flags.read_only) = -1; |
| 1230 | XFASTINT (buffer_local_flags.major_mode) = -1; |
| 1231 | XFASTINT (buffer_local_flags.mode_name) = -1; |
| 1232 | XFASTINT (buffer_local_flags.undo_list) = -1; |
| 1233 | |
| 1234 | XFASTINT (buffer_local_flags.mode_line_format) = 1; |
| 1235 | XFASTINT (buffer_local_flags.abbrev_mode) = 2; |
| 1236 | XFASTINT (buffer_local_flags.overwrite_mode) = 4; |
| 1237 | XFASTINT (buffer_local_flags.case_fold_search) = 8; |
| 1238 | XFASTINT (buffer_local_flags.auto_fill_function) = 0x10; |
| 1239 | XFASTINT (buffer_local_flags.selective_display) = 0x20; |
| 1240 | #ifndef old |
| 1241 | XFASTINT (buffer_local_flags.selective_display_ellipses) = 0x40; |
| 1242 | #endif |
| 1243 | XFASTINT (buffer_local_flags.tab_width) = 0x80; |
| 1244 | XFASTINT (buffer_local_flags.truncate_lines) = 0x100; |
| 1245 | XFASTINT (buffer_local_flags.ctl_arrow) = 0x200; |
| 1246 | XFASTINT (buffer_local_flags.fill_column) = 0x400; |
| 1247 | XFASTINT (buffer_local_flags.left_margin) = 0x800; |
| 1248 | XFASTINT (buffer_local_flags.abbrev_table) = 0x1000; |
| 1249 | XFASTINT (buffer_local_flags.display_table) = 0x2000; |
| 1250 | XFASTINT (buffer_local_flags.fieldlist) = 0x4000; |
| 1251 | XFASTINT (buffer_local_flags.syntax_table) = 0x8000; |
| 1252 | |
| 1253 | Vbuffer_alist = Qnil; |
| 1254 | current_buffer = 0; |
| 1255 | all_buffers = 0; |
| 1256 | |
| 1257 | QSFundamental = build_string ("Fundamental"); |
| 1258 | |
| 1259 | Qfundamental_mode = intern ("fundamental-mode"); |
| 1260 | buffer_defaults.major_mode = Qfundamental_mode; |
| 1261 | |
| 1262 | Qmode_class = intern ("mode-class"); |
| 1263 | |
| 1264 | Qprotected_field = intern ("protected-field"); |
| 1265 | |
| 1266 | Qpermanent_local = intern ("permanent-local"); |
| 1267 | |
| 1268 | Qkill_buffer_hook = intern ("kill-buffer-hook"); |
| 1269 | |
| 1270 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
| 1271 | /* super-magic invisible buffer */ |
| 1272 | Vbuffer_alist = Qnil; |
| 1273 | |
| 1274 | tem = Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
| 1275 | /* Want no undo records for *scratch* |
| 1276 | until after Emacs is dumped */ |
| 1277 | Fbuffer_disable_undo (tem); |
| 1278 | } |
| 1279 | |
| 1280 | init_buffer () |
| 1281 | { |
| 1282 | char buf[MAXPATHLEN+1]; |
| 1283 | |
| 1284 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
| 1285 | if (getwd (buf) == 0) |
| 1286 | fatal ("`getwd' failed: %s.\n", buf); |
| 1287 | |
| 1288 | #ifndef VMS |
| 1289 | /* Maybe this should really use some standard subroutine |
| 1290 | whose definition is filename syntax dependent. */ |
| 1291 | if (buf[strlen (buf) - 1] != '/') |
| 1292 | strcat (buf, "/"); |
| 1293 | #endif /* not VMS */ |
| 1294 | current_buffer->directory = build_string (buf); |
| 1295 | } |
| 1296 | |
| 1297 | /* initialize the buffer routines */ |
| 1298 | syms_of_buffer () |
| 1299 | { |
| 1300 | staticpro (&Vbuffer_defaults); |
| 1301 | staticpro (&Vbuffer_local_symbols); |
| 1302 | staticpro (&Qfundamental_mode); |
| 1303 | staticpro (&Qmode_class); |
| 1304 | staticpro (&QSFundamental); |
| 1305 | staticpro (&Vbuffer_alist); |
| 1306 | staticpro (&Qprotected_field); |
| 1307 | staticpro (&Qpermanent_local); |
| 1308 | staticpro (&Qkill_buffer_hook); |
| 1309 | |
| 1310 | Fput (Qprotected_field, Qerror_conditions, |
| 1311 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); |
| 1312 | Fput (Qprotected_field, Qerror_message, |
| 1313 | build_string ("Attempt to modify a protected field")); |
| 1314 | |
| 1315 | /* All these use DEFVAR_LISP_NOPRO because the slots in |
| 1316 | buffer_defaults will all be marked via Vbuffer_defaults. */ |
| 1317 | |
| 1318 | DEFVAR_LISP_NOPRO ("default-mode-line-format", |
| 1319 | &buffer_defaults.mode_line_format, |
| 1320 | "Default value of `mode-line-format' for buffers that don't override it.\n\ |
| 1321 | This is the same as (default-value 'mode-line-format)."); |
| 1322 | |
| 1323 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
| 1324 | &buffer_defaults.abbrev_mode, |
| 1325 | "Default value of `abbrev-mode' for buffers that do not override it.\n\ |
| 1326 | This is the same as (default-value 'abbrev-mode)."); |
| 1327 | |
| 1328 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", |
| 1329 | &buffer_defaults.ctl_arrow, |
| 1330 | "Default value of `ctl-arrow' for buffers that do not override it.\n\ |
| 1331 | This is the same as (default-value 'ctl-arrow)."); |
| 1332 | |
| 1333 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
| 1334 | &buffer_defaults.truncate_lines, |
| 1335 | "Default value of `truncate-lines' for buffers that do not override it.\n\ |
| 1336 | This is the same as (default-value 'truncate-lines)."); |
| 1337 | |
| 1338 | DEFVAR_LISP_NOPRO ("default-fill-column", |
| 1339 | &buffer_defaults.fill_column, |
| 1340 | "Default value of `fill-column' for buffers that do not override it.\n\ |
| 1341 | This is the same as (default-value 'fill-column)."); |
| 1342 | |
| 1343 | DEFVAR_LISP_NOPRO ("default-left-margin", |
| 1344 | &buffer_defaults.left_margin, |
| 1345 | "Default value of `left-margin' for buffers that do not override it.\n\ |
| 1346 | This is the same as (default-value 'left-margin)."); |
| 1347 | |
| 1348 | DEFVAR_LISP_NOPRO ("default-tab-width", |
| 1349 | &buffer_defaults.tab_width, |
| 1350 | "Default value of `tab-width' for buffers that do not override it.\n\ |
| 1351 | This is the same as (default-value 'tab-width)."); |
| 1352 | |
| 1353 | DEFVAR_LISP_NOPRO ("default-case-fold-search", |
| 1354 | &buffer_defaults.case_fold_search, |
| 1355 | "Default value of `case-fold-search' for buffers that don't override it.\n\ |
| 1356 | This is the same as (default-value 'case-fold-search)."); |
| 1357 | |
| 1358 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, 0); |
| 1359 | |
| 1360 | /* This doc string is too long for cpp; cpp dies if it isn't in a comment. |
| 1361 | But make-docfile finds it! |
| 1362 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
| 1363 | "Template for displaying mode line for current buffer.\n\ |
| 1364 | Each buffer has its own value of this variable.\n\ |
| 1365 | Value may be a string, a symbol or a list or cons cell.\n\ |
| 1366 | For a symbol, its value is used (but it is ignored if t or nil).\n\ |
| 1367 | A string appearing directly as the value of a symbol is processed verbatim\n\ |
| 1368 | in that the %-constructs below are not recognized.\n\ |
| 1369 | For a list whose car is a symbol, the symbol's value is taken,\n\ |
| 1370 | and if that is non-nil, the cadr of the list is processed recursively.\n\ |
| 1371 | Otherwise, the caddr of the list (if there is one) is processed.\n\ |
| 1372 | For a list whose car is a string or list, each element is processed\n\ |
| 1373 | recursively and the results are effectively concatenated.\n\ |
| 1374 | For a list whose car is an integer, the cdr of the list is processed\n\ |
| 1375 | and padded (if the number is positive) or truncated (if negative)\n\ |
| 1376 | to the width specified by that number.\n\ |
| 1377 | A string is printed verbatim in the mode line except for %-constructs:\n\ |
| 1378 | (%-constructs are allowed when the string is the entire mode-line-format\n\ |
| 1379 | or when it is found in a cons-cell or a list)\n\ |
| 1380 | %b -- print buffer name. %f -- print visited file name.\n\ |
| 1381 | %* -- print *, % or hyphen. %m -- print value of mode-name (obsolete).\n\ |
| 1382 | %s -- print process status. %M -- print value of global-mode-string. (obs)\n\ |
| 1383 | %p -- print percent of buffer above top of window, or top, bot or all.\n\ |
| 1384 | %n -- print Narrow if appropriate.\n\ |
| 1385 | %[ -- print one [ for each recursive editing level. %] similar.\n\ |
| 1386 | %% -- print %. %- -- print infinitely many dashes.\n\ |
| 1387 | Decimal digits after the % specify field width to which to pad."); |
| 1388 | */ |
| 1389 | |
| 1390 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
| 1391 | "*Major mode for new buffers. Defaults to `fundamental-mode'.\n\ |
| 1392 | nil here means use current buffer's major mode."); |
| 1393 | |
| 1394 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, |
| 1395 | "Symbol for current buffer's major mode."); |
| 1396 | |
| 1397 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, |
| 1398 | "Pretty name of current buffer's major mode (a string)."); |
| 1399 | |
| 1400 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, |
| 1401 | "Non-nil turns on automatic expansion of abbrevs as they are inserted.\n\ |
| 1402 | Automatically becomes buffer-local when set in any fashion."); |
| 1403 | |
| 1404 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, |
| 1405 | "*Non-nil if searches should ignore case.\n\ |
| 1406 | Automatically becomes buffer-local when set in any fashion."); |
| 1407 | |
| 1408 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, |
| 1409 | "*Column beyond which automatic line-wrapping should happen.\n\ |
| 1410 | Automatically becomes buffer-local when set in any fashion."); |
| 1411 | |
| 1412 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, |
| 1413 | "*Column for the default indent-line-function to indent to.\n\ |
| 1414 | Linefeed indents to this column in Fundamental mode.\n\ |
| 1415 | Automatically becomes buffer-local when set in any fashion."); |
| 1416 | |
| 1417 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, |
| 1418 | "*Distance between tab stops (for display of tab characters), in columns.\n\ |
| 1419 | Automatically becomes buffer-local when set in any fashion."); |
| 1420 | |
| 1421 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, |
| 1422 | "*Non-nil means display control chars with uparrow.\n\ |
| 1423 | Nil means use backslash and octal digits.\n\ |
| 1424 | Automatically becomes buffer-local when set in any fashion.\n\ |
| 1425 | This variable does not apply to characters whose display is specified\n\ |
| 1426 | in the current display table (if there is one)."); |
| 1427 | |
| 1428 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, |
| 1429 | "*Non-nil means do not display continuation lines;\n\ |
| 1430 | give each line of text one screen line.\n\ |
| 1431 | Automatically becomes buffer-local when set in any fashion.\n\ |
| 1432 | \n\ |
| 1433 | Note that this is overridden by the variable\n\ |
| 1434 | `truncate-partial-width-windows' if that variable is non-nil\n\ |
| 1435 | and this buffer is not full-screen width."); |
| 1436 | |
| 1437 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
| 1438 | "Name of default directory of current buffer. Should end with slash.\n\ |
| 1439 | Each buffer has its own value of this variable."); |
| 1440 | |
| 1441 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, |
| 1442 | "Function called (if non-nil) to perform auto-fill.\n\ |
| 1443 | It is called after self-inserting a space at a column beyond `fill-column'.\n\ |
| 1444 | Each buffer has its own value of this variable.\n\ |
| 1445 | NOTE: This variable is not an ordinary hook;\n\ |
| 1446 | It may not be a list of functions."); |
| 1447 | |
| 1448 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, |
| 1449 | "Name of file visited in current buffer, or nil if not visiting a file.\n\ |
| 1450 | Each buffer has its own value of this variable."); |
| 1451 | |
| 1452 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
| 1453 | ¤t_buffer->auto_save_file_name, |
| 1454 | "Name of file for auto-saving current buffer,\n\ |
| 1455 | or nil if buffer should not be auto-saved.\n\ |
| 1456 | Each buffer has its own value of this variable."); |
| 1457 | |
| 1458 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, |
| 1459 | "Non-nil if this buffer is read-only.\n\ |
| 1460 | Each buffer has its own value of this variable."); |
| 1461 | |
| 1462 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, |
| 1463 | "Non-nil if this buffer's file has been backed up.\n\ |
| 1464 | Backing up is done before the first time the file is saved.\n\ |
| 1465 | Each buffer has its own value of this variable."); |
| 1466 | |
| 1467 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, |
| 1468 | "Length of current buffer when last read in, saved or auto-saved.\n\ |
| 1469 | 0 initially.\n\ |
| 1470 | Each buffer has its own value of this variable."); |
| 1471 | |
| 1472 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, |
| 1473 | "Non-nil enables selective display:\n\ |
| 1474 | Integer N as value means display only lines\n\ |
| 1475 | that start with less than n columns of space.\n\ |
| 1476 | A value of t means, after a ^M, all the rest of the line is invisible.\n\ |
| 1477 | Then ^M's in the file are written into files as newlines.\n\n\ |
| 1478 | Automatically becomes buffer-local when set in any fashion."); |
| 1479 | |
| 1480 | #ifndef old |
| 1481 | DEFVAR_PER_BUFFER ("selective-display-ellipses", |
| 1482 | ¤t_buffer->selective_display_ellipses, |
| 1483 | "t means display ... on previous line when a line is invisible.\n\ |
| 1484 | Automatically becomes buffer-local when set in any fashion."); |
| 1485 | #endif |
| 1486 | |
| 1487 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, |
| 1488 | "Non-nil if self-insertion should replace existing text.\n\ |
| 1489 | Automatically becomes buffer-local when set in any fashion."); |
| 1490 | |
| 1491 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
| 1492 | "Display table that controls display of the contents of current buffer.\n\ |
| 1493 | Automatically becomes buffer-local when set in any fashion.\n\ |
| 1494 | The display table is a vector created with `make-display-table'.\n\ |
| 1495 | The first 256 elements control how to display each possible text character.\n\ |
| 1496 | The value should be a \"rope\" (see `make-rope') or nil;\n\ |
| 1497 | nil means display the character in the default fashion.\n\ |
| 1498 | The remaining five elements are ropes that control the display of\n\ |
| 1499 | the end of a truncated screen line (element 256);\n\ |
| 1500 | the end of a continued line (element 257);\n\ |
| 1501 | the escape character used to display character codes in octal (element 258);\n\ |
| 1502 | the character used as an arrow for control characters (element 259);\n\ |
| 1503 | the decoration indicating the presence of invisible lines (element 260).\n\ |
| 1504 | If this variable is nil, the value of `standard-display-table' is used.\n\ |
| 1505 | Each window can have its own, overriding display table."); |
| 1506 | |
| 1507 | DEFVAR_PER_BUFFER ("buffer-field-list", ¤t_buffer->fieldlist, |
| 1508 | "List of fields in the current buffer. See `add-field'."); |
| 1509 | |
| 1510 | DEFVAR_BOOL ("check-protected-fields", check_protected_fields, |
| 1511 | "Non-nil means don't allow modification of a protected field.\n\ |
| 1512 | See `add-field'."); |
| 1513 | check_protected_fields = 0; |
| 1514 | |
| 1515 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
| 1516 | "Don't ask."); |
| 1517 | */ |
| 1518 | DEFVAR_LISP ("bgfore-change-function", &Vbefore_change_function, |
| 1519 | "Function to call before each text change.\n\ |
| 1520 | Two arguments are passed to the function: the positions of\n\ |
| 1521 | the beginning and end of the range of old text to be changed.\n\ |
| 1522 | \(For an insertion, the beginning and end are at the same place.)\n\ |
| 1523 | No information is given about the length of the text after the change.\n\ |
| 1524 | position of the change\n\ |
| 1525 | \n\ |
| 1526 | While executing the `before-change-function', changes to buffers do not\n\ |
| 1527 | cause calls to any `before-change-function' or `after-change-function'."); |
| 1528 | Vbefore_change_function = Qnil; |
| 1529 | |
| 1530 | DEFVAR_LISP ("after-change-function", &Vafter_change_function, |
| 1531 | "Function to call after each text change.\n\ |
| 1532 | Three arguments are passed to the function: the positions of\n\ |
| 1533 | the beginning and end of the range of changed text,\n\ |
| 1534 | and the length of the pre-change text replaced by that range.\n\ |
| 1535 | \(For an insertion, the pre-change length is zero;\n\ |
| 1536 | for a deletion, that length is the number of characters deleted,\n\ |
| 1537 | and the post-change beginning and end are at the same place.)\n\ |
| 1538 | \n\ |
| 1539 | While executing the `after-change-function', changes to buffers do not\n\ |
| 1540 | cause calls to any `before-change-function' or `after-change-function'."); |
| 1541 | Vafter_change_function = Qnil; |
| 1542 | |
| 1543 | DEFVAR_LISP ("first-change-function", &Vfirst_change_function, |
| 1544 | "Function to call before changing a buffer which is unmodified.\n\ |
| 1545 | The function is called, with no arguments, if it is non-nil."); |
| 1546 | Vfirst_change_function = Qnil; |
| 1547 | |
| 1548 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, |
| 1549 | "List of undo entries in current buffer.\n\ |
| 1550 | Recent changes come first; older changes follow newer.\n\ |
| 1551 | \n\ |
| 1552 | An entry (START . END) represents an insertion which begins at\n\ |
| 1553 | position START and ends at position END.\n\ |
| 1554 | \n\ |
| 1555 | An entry (TEXT . POSITION) represents the deletion of the string TEXT\n\ |
| 1556 | from (abs POSITION). If POSITION is positive, point was at the front\n\ |
| 1557 | of the text being deleted; if negative, point was at the end.\n\ |
| 1558 | \n\ |
| 1559 | An entry (t HIGHWORD LOWWORD) indicates that the buffer had been\n\ |
| 1560 | previously unmodified. HIGHWORD and LOWWORD are the high and low\n\ |
| 1561 | 16-bit words of the buffer's modification count at the time. If the\n\ |
| 1562 | modification count of the most recent save is different, this entry is\n\ |
| 1563 | obsolete.\n\ |
| 1564 | \n\ |
| 1565 | nil marks undo boundaries. The undo command treats the changes\n\ |
| 1566 | between two undo boundaries as a single step to be undone.\n\ |
| 1567 | \n\ |
| 1568 | If the value of the variable is t, undo information is not recorded.\n\ |
| 1569 | "); |
| 1570 | |
| 1571 | defsubr (&Sbuffer_list); |
| 1572 | defsubr (&Sget_buffer); |
| 1573 | defsubr (&Sget_file_buffer); |
| 1574 | defsubr (&Sget_buffer_create); |
| 1575 | defsubr (&Sgenerate_new_buffer); |
| 1576 | defsubr (&Sbuffer_name); |
| 1577 | /*defsubr (&Sbuffer_number);*/ |
| 1578 | defsubr (&Sbuffer_file_name); |
| 1579 | defsubr (&Sbuffer_local_variables); |
| 1580 | defsubr (&Sbuffer_modified_p); |
| 1581 | defsubr (&Sset_buffer_modified_p); |
| 1582 | defsubr (&Sbuffer_modified_tick); |
| 1583 | defsubr (&Srename_buffer); |
| 1584 | defsubr (&Sother_buffer); |
| 1585 | defsubr (&Sbuffer_disable_undo); |
| 1586 | defsubr (&Sbuffer_enable_undo); |
| 1587 | defsubr (&Skill_buffer); |
| 1588 | defsubr (&Serase_buffer); |
| 1589 | defsubr (&Sswitch_to_buffer); |
| 1590 | defsubr (&Spop_to_buffer); |
| 1591 | defsubr (&Scurrent_buffer); |
| 1592 | defsubr (&Sset_buffer); |
| 1593 | defsubr (&Sbarf_if_buffer_read_only); |
| 1594 | defsubr (&Sbury_buffer); |
| 1595 | defsubr (&Slist_buffers); |
| 1596 | defsubr (&Skill_all_local_variables); |
| 1597 | defsubr (&Sregion_fields); |
| 1598 | } |
| 1599 | |
| 1600 | keys_of_buffer () |
| 1601 | { |
| 1602 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); |
| 1603 | initial_define_key (control_x_map, 'k', "kill-buffer"); |
| 1604 | initial_define_key (control_x_map, Ctl ('B'), "list-buffers"); |
| 1605 | } |