lisp/textmodes/tex-mode.el

   1 ;;; tex-mode.el --- TeX, LaTeX, and SliTeX mode commands.
   2
   3 ;; Copyright (C) 1985, 86, 89, 92, 94, 95 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: tex
   7
   8 ;; Contributions over the years by William F. Schelter, Dick King,
   9 ;; Stephen Gildea, Michael Prange, Jacob Gore, and Edward M. Reingold.
  10
  11 ;; This file is part of GNU Emacs.
  12
  13 ;; GNU Emacs is free software; you can redistribute it and/or modify
  14 ;; it under the terms of the GNU General Public License as published by
  15 ;; the Free Software Foundation; either version 2, or (at your option)
  16 ;; any later version.
  17
  18 ;; GNU Emacs is distributed in the hope that it will be useful,
  19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 ;; GNU General Public License for more details.
  22
  23 ;; You should have received a copy of the GNU General Public License
  24 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  25 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  26
  27 ;;; Code:
  28
  29 (require 'shell)
  30 (require 'compile)
  31
  32 ;;;###autoload
  33 (defvar tex-shell-file-name nil
  34   "*If non-nil, the shell file name to run in the subshell used to run TeX.")
  35
  36 ;;;###autoload
  37 (defvar tex-directory "."
  38   "*Directory in which temporary files are left.
  39 You can make this `/tmp' if your TEXINPUTS has no relative directories in it
  40 and you don't try to apply \\[tex-region] or \\[tex-buffer] when there are
  41 `\\input' commands with relative directories.")
  42
  43 ;;;###autoload
  44 (defvar tex-offer-save t
  45   "*If non-nil, ask about saving modified buffers before \\[tex-file] is run.")
  46
  47 ;;;###autoload
  48 (defvar tex-run-command "tex"
  49   "*Command used to run TeX subjob.
  50 If this string contains an asterisk (`*'), that is replaced by the file name;
  51 otherwise, the file name, preceded by blank, is added at the end.")
  52
  53 ;;;###autoload
  54 (defvar latex-run-command "latex"
  55   "*Command used to run LaTeX subjob.
  56 If this string contains an asterisk (`*'), that is replaced by the file name;
  57 otherwise, the file name, preceded by blank, is added at the end.")
  58
  59 (defvar standard-latex-block-names
  60       '("abstract"         "array"            "center"       "description"
  61         "displaymath"      "document"         "enumerate"    "eqnarray"
  62         "eqnarray*"        "equation"         "figure"       "figure*"
  63         "flushleft"        "flushright"       "itemize"      "letter"
  64         "list"             "minipage"         "picture"      "quotation"
  65         "quote"            "slide"            "sloppypar"     "tabbing"
  66         "table"            "table*"           "tabular"       "tabular*"
  67         "thebibliography"  "theindex*"        "titlepage"     "trivlist"
  68         "verbatim"         "verbatim*"        "verse")
  69   "Standard LaTeX block names.")
  70
  71 ;;;###autoload
  72 (defvar latex-block-names nil
  73   "*User defined LaTeX block names.
  74 Combined with `standard-latex-block-names' for minibuffer completion.")
  75
  76 ;;;###autoload
  77 (defvar slitex-run-command "slitex"
  78   "*Command used to run SliTeX subjob.
  79 If this string contains an asterisk (`*'), that is replaced by the file name;
  80 otherwise, the file name, preceded by blank, is added at the end.")
  81
  82 ;;;###autoload
  83 (defvar tex-bibtex-command "bibtex"
  84   "*Command used by `tex-bibtex-file' to gather bibliographic data.
  85 If this string contains an asterisk (`*'), that is replaced by the file name;
  86 otherwise, the file name, preceded by blank, is added at the end.")
  87
  88 ;;;###autoload
  89 (defvar tex-dvi-print-command "lpr -d"
  90   "*Command used by \\[tex-print] to print a .dvi file.
  91 If this string contains an asterisk (`*'), that is replaced by the file name;
  92 otherwise, the file name, preceded by blank, is added at the end.")
  93
  94 ;;;###autoload
  95 (defvar tex-alt-dvi-print-command "lpr -d"
  96   "*Command used by \\[tex-print] with a prefix arg to print a .dvi file.
  97 If this string contains an asterisk (`*'), that is replaced by the file name;
  98 otherwise, the file name, preceded by blank, is added at the end.
  99
 100 If two printers are not enough of a choice, you can set the variable
 101 `tex-alt-dvi-print-command' to an expression that asks what you want;
 102 for example,
 103
 104     (setq tex-alt-dvi-print-command
 105          '(format \"lpr -P%s\" (read-string \"Use printer: \")))
 106
 107 would tell \\[tex-print] with a prefix argument to ask you which printer to
 108 use.")
 109
 110 ;;;###autoload
 111 (defvar tex-dvi-view-command nil
 112   "*Command used by \\[tex-view] to display a `.dvi' file.
 113 If this string contains an asterisk (`*'), that is replaced by the file name;
 114 otherwise, the file name, preceded by blank, is added at the end.
 115
 116 This can be set conditionally so that the previewer used is suitable for the
 117 window system being used.  For example,
 118
 119     (setq tex-dvi-view-command
 120           (if (eq window-system 'x) \"xdvi\" \"dvi2tty * | cat -s\"))
 121
 122 would tell \\[tex-view] to use xdvi under X windows and to use dvi2tty
 123 otherwise.")
 124
 125 ;;;###autoload
 126 (defvar tex-show-queue-command "lpq"
 127   "*Command used by \\[tex-show-print-queue] to show the print queue.
 128 Should show the queue(s) that \\[tex-print] puts jobs on.")
 129
 130 ;;;###autoload
 131 (defvar tex-default-mode 'plain-tex-mode
 132   "*Mode to enter for a new file that might be either TeX or LaTeX.
 133 This variable is used when it can't be determined whether the file
 134 is plain TeX or LaTeX or what because the file contains no commands.
 135 Normally set to either `plain-tex-mode' or `latex-mode'.")
 136
 137 ;;;###autoload
 138 (defvar tex-open-quote "``"
 139   "*String inserted by typing \\[tex-insert-quote] to open a quotation.")
 140
 141 ;;;###autoload
 142 (defvar tex-close-quote "''"
 143   "*String inserted by typing \\[tex-insert-quote] to close a quotation.")
 144
 145 (defvar tex-last-temp-file nil
 146   "Latest temporary file generated by \\[tex-region] and \\[tex-buffer].
 147 Deleted when the \\[tex-region] or \\[tex-buffer] is next run, or when the
 148 tex shell terminates.")
 149
 150 (defvar tex-command nil
 151   "Command to run TeX.
 152 The name of the file, preceded by a blank, will be added to this string.")
 153
 154 (defvar tex-trailer nil
 155   "String appended after the end of a region sent to TeX by \\[tex-region].")
 156
 157 (defvar tex-start-of-header nil
 158   "String used by \\[tex-region] to delimit the start of the file's header.")
 159
 160 (defvar tex-end-of-header nil
 161   "String used by \\[tex-region] to delimit the end of the file's header.")
 162
 163 (defvar tex-shell-cd-command "cd"
 164   "Command to give to shell running TeX to change directory.
 165 The value of `tex-directory' is appended to this, separated by a space.")
 166
 167 (defvar tex-zap-file nil
 168   "Temporary file name used for text being sent as input to TeX.
 169 Should be a simple file name with no extension or directory specification.")
 170
 171 (defvar tex-last-buffer-texed nil
 172   "Buffer which was last TeXed.")
 173
 174 (defvar tex-print-file nil
 175   "File name that \\[tex-print] prints.
 176 Set by \\[tex-region], \\[tex-buffer], and \\[tex-file].")
 177
 178 (defvar tex-mode-syntax-table nil
 179   "Syntax table used while in TeX mode.")
 180
 181 (defun tex-define-common-keys (keymap)
 182   "Define the keys that we want defined both in TeX mode and in the TeX shell."
 183   (define-key keymap "\C-c\C-k" 'tex-kill-job)
 184   (define-key keymap "\C-c\C-l" 'tex-recenter-output-buffer)
 185   (define-key keymap "\C-c\C-q" 'tex-show-print-queue)
 186   (define-key keymap "\C-c\C-p" 'tex-print)
 187   (define-key keymap "\C-c\C-v" 'tex-view)
 188
 189   (define-key keymap [menu-bar tex] (cons "TeX" (make-sparse-keymap "TeX")))
 190
 191   (define-key keymap [menu-bar tex tex-kill-job] '("Tex Kill" . tex-kill-job))
 192   (define-key keymap [menu-bar tex tex-recenter-output-buffer]
 193     '("Tex Recenter" . tex-recenter-output-buffer))
 194   (define-key keymap [menu-bar tex tex-show-print-queue]
 195     '("Show Print Queue" . tex-show-print-queue))
 196   (define-key keymap [menu-bar tex tex-alt-print]
 197     '("Tex Print (alt printer)" . tex-alt-print))
 198   (define-key keymap [menu-bar tex tex-print] '("Tex Print" . tex-print))
 199   (define-key keymap [menu-bar tex tex-view] '("Tex View" . tex-view))
 200   )
 201
 202 (defvar tex-mode-map nil "Keymap for TeX mode.")
 203
 204 (if tex-mode-map
 205     nil
 206   (setq tex-mode-map (make-sparse-keymap))
 207   (tex-define-common-keys tex-mode-map)
 208   (define-key tex-mode-map "\"" 'tex-insert-quote)
 209   (define-key tex-mode-map "\n" 'tex-terminate-paragraph)
 210   (define-key tex-mode-map "\C-c}" 'up-list)
 211   (define-key tex-mode-map "\C-c{" 'tex-insert-braces)
 212   (define-key tex-mode-map "\C-c\C-r" 'tex-region)
 213   (define-key tex-mode-map "\C-c\C-b" 'tex-buffer)
 214   (define-key tex-mode-map "\C-c\C-f" 'tex-file)
 215   (define-key tex-mode-map "\C-c\C-i" 'tex-bibtex-file)
 216   (define-key tex-mode-map "\C-c\C-o" 'tex-latex-block)
 217   (define-key tex-mode-map "\C-c\C-e" 'tex-close-latex-block)
 218   (define-key tex-mode-map "\C-c\C-u" 'tex-goto-last-unclosed-latex-block)
 219   (define-key tex-mode-map [menu-bar tex tex-bibtex-file]
 220     '("BibTeX File" . tex-bibtex-file))
 221   (define-key tex-mode-map [menu-bar tex tex-validate-region]
 222     '("Validate Region" . tex-validate-region))
 223   (define-key tex-mode-map [menu-bar tex validate-tex-buffer]
 224     '("Validate Buffer" . validate-tex-buffer))
 225   (define-key tex-mode-map [menu-bar tex tex-region]
 226     '("TeX Region" . tex-region))
 227   (define-key tex-mode-map [menu-bar tex tex-buffer]
 228     '("TeX Buffer" . tex-buffer))
 229   (define-key tex-mode-map [menu-bar tex tex-file] '("TeX File" . tex-file)))
 230
 231 (put 'tex-region 'menu-enable 'mark-active)
 232 (put 'tex-validate-region 'menu-enable 'mark-active)
 233 (put 'tex-print 'menu-enable '(stringp tex-print-file))
 234 (put 'tex-alt-print 'menu-enable '(stringp tex-print-file))
 235 (put 'tex-view 'menu-enable '(stringp tex-print-file))
 236 (put 'tex-recenter-output-buffer 'menu-enable '(get-buffer "*tex-shell*"))
 237 (put 'tex-kill-job 'menu-enable '(tex-shell-running))
 238
 239
 240 (defvar tex-shell-map nil
 241   "Keymap for the TeX shell.
 242 Inherits `shell-mode-map' with a few additions.")
 243
 244 (defvar compare-windows-whitespace)     ; Pacify the byte-compiler
 245
 246 ;;; This would be a lot simpler if we just used a regexp search,
 247 ;;; but then it would be too slow.
 248 ;;;###autoload
 249 (defun tex-mode ()
 250   "Major mode for editing files of input for TeX, LaTeX, or SliTeX.
 251 Tries to determine (by looking at the beginning of the file) whether
 252 this file is for plain TeX, LaTeX, or SliTeX and calls `plain-tex-mode',
 253 `latex-mode', or `slitex-mode', respectively.  If it cannot be determined,
 254 such as if there are no commands in the file, the value of `tex-default-mode'
 255 says which mode to use."
 256   (interactive)
 257   (let (mode slash comment)
 258     (save-excursion
 259       (goto-char (point-min))
 260       (while (and (setq slash (search-forward "\\" nil t))
 261                   (setq comment (let ((search-end (point)))
 262                                   (save-excursion
 263                                     (beginning-of-line)
 264                                     (search-forward "%" search-end t))))))
 265       (if (and slash (not comment))
 266           (setq mode (if (looking-at "documentstyle\\|documentclass\\|begin\\b\\|NeedsTeXFormat{LaTeX")
 267                          (if (looking-at
 268                               "document\\(style\\|class\\)\\(\\[.*\\]\\)?{slides}")
 269                              'slitex-mode
 270                            'latex-mode)
 271                        'plain-tex-mode))))
 272     (if mode (funcall mode)
 273       (funcall tex-default-mode))))
 274
 275 ;;;###autoload
 276 (defalias 'TeX-mode 'tex-mode)
 277 ;;;###autoload
 278 (defalias 'LaTeX-mode 'latex-mode)
 279
 280 ;;;###autoload
 281 (defun plain-tex-mode ()
 282   "Major mode for editing files of input for plain TeX.
 283 Makes $ and } display the characters they match.
 284 Makes \" insert `` when it seems to be the beginning of a quotation,
 285 and '' when it appears to be the end; it inserts \" only after a \\.
 286
 287 Use \\[tex-region] to run TeX on the current region, plus a \"header\"
 288 copied from the top of the file (containing macro definitions, etc.),
 289 running TeX under a special subshell.  \\[tex-buffer] does the whole buffer.
 290 \\[tex-file] saves the buffer and then processes the file.
 291 \\[tex-print] prints the .dvi file made by any of these.
 292 \\[tex-view] previews the .dvi file made by any of these.
 293 \\[tex-bibtex-file] runs bibtex on the file of the current buffer.
 294
 295 Use \\[validate-tex-buffer] to check buffer for paragraphs containing
 296 mismatched $'s or braces.
 297
 298 Special commands:
 299 \\{tex-mode-map}
 300
 301 Mode variables:
 302 tex-run-command
 303         Command string used by \\[tex-region] or \\[tex-buffer].
 304 tex-directory
 305         Directory in which to create temporary files for TeX jobs
 306         run by \\[tex-region] or \\[tex-buffer].
 307 tex-dvi-print-command
 308         Command string used by \\[tex-print] to print a .dvi file.
 309 tex-alt-dvi-print-command
 310         Alternative command string used by \\[tex-print] (when given a prefix
 311         argument) to print a .dvi file.
 312 tex-dvi-view-command
 313         Command string used by \\[tex-view] to preview a .dvi file.
 314 tex-show-queue-command
 315         Command string used by \\[tex-show-print-queue] to show the print
 316         queue that \\[tex-print] put your job on.
 317
 318 Entering Plain-tex mode runs the hook `text-mode-hook', then the hook
 319 `tex-mode-hook', and finally the hook `plain-tex-mode-hook'.  When the
 320 special subshell is initiated, the hook `tex-shell-hook' is run."
 321
 322   (interactive)
 323   (tex-common-initialization)
 324   (setq mode-name "TeX")
 325   (setq major-mode 'plain-tex-mode)
 326   (setq tex-command tex-run-command)
 327   (setq tex-start-of-header "%**start of header")
 328   (setq tex-end-of-header "%**end of header")
 329   (setq tex-trailer "\\bye\n")
 330   (run-hooks 'text-mode-hook 'tex-mode-hook 'plain-tex-mode-hook))
 331 ;;;###autoload
 332 (defalias 'plain-TeX-mode 'plain-tex-mode)
 333
 334 ;;;###autoload
 335 (defun latex-mode ()
 336   "Major mode for editing files of input for LaTeX.
 337 Makes $ and } display the characters they match.
 338 Makes \" insert `` when it seems to be the beginning of a quotation,
 339 and '' when it appears to be the end; it inserts \" only after a \\.
 340
 341 Use \\[tex-region] to run LaTeX on the current region, plus the preamble
 342 copied from the top of the file (containing \\documentstyle, etc.),
 343 running LaTeX under a special subshell.  \\[tex-buffer] does the whole buffer.
 344 \\[tex-file] saves the buffer and then processes the file.
 345 \\[tex-print] prints the .dvi file made by any of these.
 346 \\[tex-view] previews the .dvi file made by any of these.
 347 \\[tex-bibtex-file] runs bibtex on the file of the current buffer.
 348
 349 Use \\[validate-tex-buffer] to check buffer for paragraphs containing
 350 mismatched $'s or braces.
 351
 352 Special commands:
 353 \\{tex-mode-map}
 354
 355 Mode variables:
 356 latex-run-command
 357         Command string used by \\[tex-region] or \\[tex-buffer].
 358 tex-directory
 359         Directory in which to create temporary files for LaTeX jobs
 360         run by \\[tex-region] or \\[tex-buffer].
 361 tex-dvi-print-command
 362         Command string used by \\[tex-print] to print a .dvi file.
 363 tex-alt-dvi-print-command
 364         Alternative command string used by \\[tex-print] (when given a prefix
 365         argument) to print a .dvi file.
 366 tex-dvi-view-command
 367         Command string used by \\[tex-view] to preview a .dvi file.
 368 tex-show-queue-command
 369         Command string used by \\[tex-show-print-queue] to show the print
 370         queue that \\[tex-print] put your job on.
 371
 372 Entering Latex mode runs the hook `text-mode-hook', then
 373 `tex-mode-hook', and finally `latex-mode-hook'.  When the special
 374 subshell is initiated, `tex-shell-hook' is run."
 375   (interactive)
 376   (tex-common-initialization)
 377   (setq mode-name "LaTeX")
 378   (setq major-mode 'latex-mode)
 379   (setq tex-command latex-run-command)
 380   (setq tex-start-of-header "\\documentstyle")
 381   (setq tex-end-of-header "\\begin{document}")
 382   (setq tex-trailer "\\end{document}\n")
 383   ;; A line containing just $$ is treated as a paragraph separator.
 384   ;; A line starting with $$ starts a paragraph,
 385   ;; but does not separate paragraphs if it has more stuff on it.
 386   (setq paragraph-start "[ \t]*$\\|[\f%]\\|[ \t]*\\$\\$\\|\
 387 \\\\begin\\>\\|\\\\label\\>\\|\\\\end\\>\\|\\\\\\[\\|\\\\\\]\\|\
 388 \\\\chapter\\>\\|\\\\section\\>\\|\
 389 \\\\subsection\\>\\|\\\\subsubsection\\>\\|\
 390 \\\\paragraph\\>\\|\\\\subparagraph\\>\\|\
 391 \\\\item\\>\\|\\\\bibitem\\>\\|\\\\newline\\>\\|\\\\noindent\\>\\|\
 392 \\\\[a-z]*space\\>\\|\\\\[a-z]*skip\\>\\|\
 393 \\\\newpage\\>\\|\\\\[a-z]*page\\|\\\\footnote\\>\\|\
 394 \\\\marginpar\\>\\|\\\\parbox\\>\\|\\\\caption\\>")
 395   (setq paragraph-separate "[ \t]*$\\|[\f%]\\|[ \t]*\\$\\$[ \t]*$\\|\
 396 \\\\begin\\>\\|\\\\label\\>\\|\\\\end\\>\\|\\\\\\[\\|\\\\\\]\\|\
 397 \\\\chapter\\>\\|\\\\section\\>\\|\
 398 \\\\subsection\\>\\|\\\\subsubsection\\>\\|\
 399 \\\\paragraph\\>\\|\\\\subparagraph\\>\\|\
 400 \\(\\\\item\\|\\\\bibitem\\|\\\\newline\\|\\\\noindent\\|\
 401 \\\\[a-z]*space\\|\\\\[a-z]*skip\\|\
 402 \\\\newpage\\|\\\\[a-z]*page[a-z]*\\|\\\\footnote\\|\
 403 \\\\marginpar\\|\\\\parbox\\|\\\\caption\\)[ \t]*\\($\\|%\\)")
 404   (run-hooks 'text-mode-hook 'tex-mode-hook 'latex-mode-hook))
 405
 406 ;;;###autoload
 407 (defun slitex-mode ()
 408   "Major mode for editing files of input for SliTeX.
 409 Makes $ and } display the characters they match.
 410 Makes \" insert `` when it seems to be the beginning of a quotation,
 411 and '' when it appears to be the end; it inserts \" only after a \\.
 412
 413 Use \\[tex-region] to run SliTeX on the current region, plus the preamble
 414 copied from the top of the file (containing \\documentstyle, etc.),
 415 running SliTeX under a special subshell.  \\[tex-buffer] does the whole buffer.
 416 \\[tex-file] saves the buffer and then processes the file.
 417 \\[tex-print] prints the .dvi file made by any of these.
 418 \\[tex-view] previews the .dvi file made by any of these.
 419 \\[tex-bibtex-file] runs bibtex on the file of the current buffer.
 420
 421 Use \\[validate-tex-buffer] to check buffer for paragraphs containing
 422 mismatched $'s or braces.
 423
 424 Special commands:
 425 \\{tex-mode-map}
 426
 427 Mode variables:
 428 slitex-run-command
 429         Command string used by \\[tex-region] or \\[tex-buffer].
 430 tex-directory
 431         Directory in which to create temporary files for SliTeX jobs
 432         run by \\[tex-region] or \\[tex-buffer].
 433 tex-dvi-print-command
 434         Command string used by \\[tex-print] to print a .dvi file.
 435 tex-alt-dvi-print-command
 436         Alternative command string used by \\[tex-print] (when given a prefix
 437         argument) to print a .dvi file.
 438 tex-dvi-view-command
 439         Command string used by \\[tex-view] to preview a .dvi file.
 440 tex-show-queue-command
 441         Command string used by \\[tex-show-print-queue] to show the print
 442         queue that \\[tex-print] put your job on.
 443
 444 Entering SliTeX mode runs the hook `text-mode-hook', then the hook
 445 `tex-mode-hook', then the hook `latex-mode-hook', and finally the hook
 446 `slitex-mode-hook'.  When the special subshell is initiated, the hook
 447 `tex-shell-hook' is run."
 448   (interactive)
 449   (tex-common-initialization)
 450   (setq mode-name "SliTeX")
 451   (setq major-mode 'slitex-mode)
 452   (setq tex-command slitex-run-command)
 453   (setq tex-start-of-header "\\documentstyle{slides}")
 454   (setq tex-end-of-header "\\begin{document}")
 455   (setq tex-trailer "\\end{document}\n")
 456   ;; A line containing just $$ is treated as a paragraph separator.
 457   ;; A line starting with $$ starts a paragraph,
 458   ;; but does not separate paragraphs if it has more stuff on it.
 459   (setq paragraph-start "[ \t]*$\\|[\f%]\\|[ \t]*\\$\\$\\|\
 460 \\\\begin\\>\\|\\\\label\\>\\|\\\\end\\>\\|\\\\\\[\\|\\\\\\]\\|\
 461 \\\\chapter\\>\\|\\\\section\\>\\|\
 462 \\\\subsection\\>\\|\\\\subsubsection\\>\\|\
 463 \\\\paragraph\\>\\|\\\\subparagraph\\>\\|\
 464 \\\\item\\>\\|\\\\bibitem\\>\\|\\\\newline\\>\\|\\\\noindent\\>\\|\
 465 \\\\[a-z]*space\\>\\|\\\\[a-z]*skip\\>\\|\
 466 \\\\newpage\\>\\|\\\\[a-z]*page\\|\\\\footnote\\>\\|\
 467 \\\\marginpar\\>\\|\\\\parbox\\>\\|\\\\caption\\>")
 468   (setq paragraph-separate "[ \t]*$\\|[\f%]\\|[ \t]*\\$\\$[ \t]*$\\|\
 469 \\\\begin\\>\\|\\\\label\\>\\|\\\\end\\>\\|\\\\\\[\\|\\\\\\]\\|\
 470 \\\\chapter\\>\\|\\\\section\\>\\|\
 471 \\\\subsection\\>\\|\\\\subsubsection\\>\\|\
 472 \\\\paragraph\\>\\|\\\\subparagraph\\>\\|\
 473 \\\\item[ \t]*$\\|\\\\bibitem[ \t]*$\\|\\\\newline[ \t]*$\\|\\\\noindent[ \t]*$\\|\
 474 \\\\[a-z]*space[ \t]*$\\|\\\\[a-z]*skip[ \t]*$\\|\
 475 \\\\newpage[ \t]*$\\|\\\\[a-z]*page[a-z]*[ \t]*$\\|\\\\footnote[ \t]*$\\|\
 476 \\\\marginpar[ \t]*$\\|\\\\parbox[ \t]*$\\|\\\\caption[ \t]*$")
 477   (run-hooks
 478    'text-mode-hook 'tex-mode-hook 'latex-mode-hook 'slitex-mode-hook))
 479
 480 (defun tex-common-initialization ()
 481   (kill-all-local-variables)
 482   (use-local-map tex-mode-map)
 483   (setq local-abbrev-table text-mode-abbrev-table)
 484   (if (null tex-mode-syntax-table)
 485       (let ((char 0))
 486         (setq tex-mode-syntax-table (make-syntax-table))
 487         (set-syntax-table tex-mode-syntax-table)
 488         (while (< char ? )
 489           (modify-syntax-entry char ".")
 490           (setq char (1+ char)))
 491         (modify-syntax-entry ?\C-@ "w")
 492         (modify-syntax-entry ?\t " ")
 493         (modify-syntax-entry ?\n ">")
 494         (modify-syntax-entry ?\f ">")
 495         (modify-syntax-entry ?$ "$$")
 496         (modify-syntax-entry ?% "<")
 497         (modify-syntax-entry ?\\ "/")
 498         (modify-syntax-entry ?\" ".")
 499         (modify-syntax-entry ?& ".")
 500         (modify-syntax-entry ?_ ".")
 501         (modify-syntax-entry ?@ "_")
 502         (modify-syntax-entry ?~ " ")
 503         (modify-syntax-entry ?' "w"))
 504     (set-syntax-table tex-mode-syntax-table))
 505   (make-local-variable 'paragraph-start)
 506   ;; A line containing just $$ is treated as a paragraph separator.
 507   (setq paragraph-start "[ \t]*$\\|[\f\\\\%]\\|[ \t]*\\$\\$")
 508   (make-local-variable 'paragraph-separate)
 509   ;; A line starting with $$ starts a paragraph,
 510   ;; but does not separate paragraphs if it has more stuff on it.
 511   (setq paragraph-separate "[ \t]*$\\|[\f\\\\%]\\|[ \t]*\\$\\$[ \t]*$")
 512   (make-local-variable 'comment-start)
 513   (setq comment-start "%")
 514   (make-local-variable 'comment-start-skip)
 515   (setq comment-start-skip "\\(\\(^\\|[^\\]\\)\\(\\\\\\\\\\)*\\)\\(%+ *\\)")
 516   (make-local-variable 'comment-indent-function)
 517   (setq comment-indent-function 'tex-comment-indent)
 518   (make-local-variable 'parse-sexp-ignore-comments)
 519   (setq parse-sexp-ignore-comments t)
 520   (make-local-variable 'compare-windows-whitespace)
 521   (setq compare-windows-whitespace 'tex-categorize-whitespace)
 522   (make-local-variable 'tex-command)
 523   (make-local-variable 'tex-start-of-header)
 524   (make-local-variable 'tex-end-of-header)
 525   (make-local-variable 'tex-trailer))
 526
 527 (defun tex-comment-indent ()
 528   (if (looking-at "%%%")
 529       (current-column)
 530     (skip-chars-backward " \t")
 531     (max (if (bolp) 0 (1+ (current-column)))
 532          comment-column)))
 533
 534 (defun tex-categorize-whitespace (backward-limit)
 535   ;; compare-windows-whitespace is set to this.
 536   ;; This is basically a finite-state machine.
 537   ;; Returns a symbol telling how TeX would treat
 538   ;; the whitespace we are looking at: null, space, or par.
 539   (let ((category 'null)
 540         (not-finished t))
 541     (skip-chars-backward " \t\n\f" backward-limit)
 542     (while not-finished
 543       (cond ((looking-at "[ \t]+")
 544              (goto-char (match-end 0))
 545              (if (eql category 'null)
 546                  (setq category 'space)))
 547             ((looking-at "\n")
 548              (cond ((eql category 'newline)
 549                     (setq category 'par)
 550                     (setq not-finished nil))
 551                    (t
 552                     (setq category 'newline) ;a strictly internal state
 553                     (goto-char (match-end 0)))))
 554             ((looking-at "\f+")
 555              (setq category 'par)
 556              (setq not-finished nil))
 557             (t
 558              (setq not-finished nil))))
 559     (skip-chars-forward " \t\n\f")
 560     (if (eql category 'newline)
 561         'space                          ;TeX doesn't distinguish
 562       category)))
 563
 564 (defun tex-insert-quote (arg)
 565   "Insert the appropriate quote marks for TeX.
 566 Inserts the value of `tex-open-quote' (normally ``) or `tex-close-quote'
 567 \(normally '') depending on the context.  With prefix argument, always
 568 inserts \" characters."
 569   (interactive "*P")
 570   (if arg
 571       (self-insert-command (prefix-numeric-value arg))
 572     (insert
 573      (cond ((or (bobp)
 574                 (save-excursion
 575                   (forward-char -1)
 576                   (looking-at "\\s(\\|\\s \\|\\s>")))
 577             tex-open-quote)
 578            ((= (preceding-char) ?\\)
 579             ?\")
 580            (t
 581             tex-close-quote)))))
 582
 583 (defun validate-tex-buffer ()
 584   "Check current buffer for paragraphs containing mismatched $s.
 585 Their positions are recorded in the buffer `*Occur*'.
 586 To find a particular invalidity from `*Occur*',
 587 switch to to that buffer and type C-c C-c on the line
 588 for the invalidity you want to see."
 589   (interactive)
 590   (let ((buffer (current-buffer))
 591         (prevpos (point-min))
 592         (linenum nil))
 593     (with-output-to-temp-buffer "*Occur*"
 594       (princ "Mismatches:\n")
 595       (save-excursion
 596         (set-buffer standard-output)
 597         (occur-mode)
 598         (setq occur-buffer buffer)
 599         (setq occur-nlines 0)
 600         (setq occur-pos-list nil))
 601       (save-excursion
 602         (goto-char (point-max))
 603         (while (and (not (input-pending-p)) (not (bobp)))
 604           (let ((end (point)))
 605             ;; Scan the previous paragraph for invalidities.
 606             (search-backward "\n\n" nil 'move)
 607             (or (tex-validate-region (point) end)
 608                 (let* ((end (save-excursion (forward-line 1) (point)))
 609                        start tem)
 610                   (beginning-of-line)
 611                   (setq start (point))
 612                   ;; Keep track of line number as we scan,
 613                   ;; in a cumulative fashion.
 614                   (if linenum
 615                       (setq linenum (- linenum (count-lines prevpos (point))))
 616                     (setq linenum (1+ (count-lines 1 start))))
 617                   (setq prevpos (point))
 618                   ;; Mention this mismatch in *Occur*.
 619                   ;; Since we scan from end of buffer to beginning,
 620                   ;; add each mismatch at the beginning of *Occur*
 621                   ;; and at the beginning of occur-pos-list.
 622                   (save-excursion
 623                     (setq tem (point-marker))
 624                     (set-buffer standard-output)
 625                     (goto-char (point-min))
 626                     ;; Skip "Mismatches:" header line.
 627                     (forward-line 1)
 628                     (setq occur-pos-list (cons tem occur-pos-list))
 629                     (insert-buffer-substring buffer start end)
 630                     (forward-char (- start end))
 631                     (insert (format "%3d: " linenum))))))))
 632       (save-excursion
 633         (set-buffer standard-output)
 634         (if (null occur-pos-list)
 635             (insert "None!\n"))
 636         (if (interactive-p)
 637             (message "%d mismatches found" (length occur-pos-list)))))))
 638
 639 (defun tex-validate-region (start end)
 640   "Check for mismatched braces or $'s in region.
 641 Returns t if no mismatches.  Returns nil and moves point to suspect
 642 area if a mismatch is found."
 643   (interactive "r")
 644   (let ((failure-point nil) (max-possible-sexps (- end start)))
 645     (save-excursion
 646       (condition-case ()
 647           (save-restriction
 648             (narrow-to-region start end)
 649             (goto-char start)
 650             (while (< 0 (setq max-possible-sexps (1- max-possible-sexps)))
 651               (forward-sexp 1)))
 652         (error
 653           (setq failure-point (point)))))
 654     (if failure-point
 655         (progn
 656           (goto-char failure-point)
 657           nil)
 658       t)))
 659
 660 (defun tex-terminate-paragraph (inhibit-validation)
 661   "Insert two newlines, breaking a paragraph for TeX.
 662 Check for mismatched braces or $s in paragraph being terminated.
 663 A prefix arg inhibits the checking."
 664   (interactive "*P")
 665   (or inhibit-validation
 666       (save-excursion
 667         (tex-validate-region
 668           (save-excursion
 669             (search-backward "\n\n" nil 'move)
 670             (point))
 671           (point)))
 672       (message "Paragraph being closed appears to contain a mismatch"))
 673   (insert "\n\n"))
 674
 675 (defun tex-insert-braces ()
 676   "Make a pair of braces and be poised to type inside of them."
 677   (interactive "*")
 678   (insert ?\{)
 679   (save-excursion
 680     (insert ?})))
 681
 682 ;;; Like tex-insert-braces, but for LaTeX.
 683 (defun tex-latex-block (name)
 684   "Creates a matching pair of lines `\\begin{NAME}' and `\\end{NAME}' at point.
 685 Puts point on a blank line between them."
 686   (interactive
 687    (prog2
 688       (barf-if-buffer-read-only)
 689       (list
 690        (completing-read "LaTeX block name: "
 691                         (mapcar 'list
 692                                 (append standard-latex-block-names
 693                                         latex-block-names))))))
 694   (let ((col (current-column)))
 695     (insert (format "\\begin{%s}\n" name))
 696     (indent-to col)
 697     (save-excursion
 698       (insert ?\n)
 699       (indent-to col)
 700       (insert-string (format "\\end{%s}" name))
 701       (if (eobp) (insert ?\n)))))
 702
 703 (defun tex-last-unended-begin ()
 704   "Leave point at the beginning of the last `\\begin{...}' that is unended."
 705   (while (and (re-search-backward "\\(\\\\begin\\s *{\\)\\|\\(\\\\end\\s *{\\)")
 706               (looking-at "\\\\end{"))
 707     (tex-last-unended-begin)))
 708
 709 (defun tex-goto-last-unclosed-latex-block ()
 710   "Move point to the last unclosed \\begin{...}.
 711 Mark is left at original location."
 712   (interactive)
 713   (let ((spot))
 714     (save-excursion
 715       (condition-case nil
 716           (tex-last-unended-begin)
 717         (error (error "Couldn't find unended \\begin")))
 718       (setq spot (point)))
 719     (push-mark)
 720     (goto-char spot)))
 721
 722 (defun tex-close-latex-block ()
 723   "Creates an \\end{...} to match the last unclosed \\begin{...}."
 724   (interactive "*")
 725   (let ((new-line-needed (bolp))
 726         text indentation)
 727     (save-excursion
 728       (condition-case nil
 729           (tex-last-unended-begin)
 730         (error (error "Couldn't find unended \\begin")))
 731       (setq indentation (current-column))
 732       (re-search-forward "\\\\begin\\(\\s *{[^}\n]*}\\)")
 733       (setq text (buffer-substring (match-beginning 1) (match-end 1))))
 734     (indent-to indentation)
 735     (insert "\\end" text)
 736     (if new-line-needed (insert ?\n))))
 737 \f
 738 (defun tex-compilation-parse-errors ()
 739   "Parse the current buffer as error messages.
 740 This makes a list of error descriptors, compilation-error-list.
 741 For each source-file, line-number pair in the buffer,
 742 the source file is read in, and the text location is saved in
 743 compilation-error-list.  The function `next-error', assigned to
 744 \\[next-error], takes the next error off the list and visits its location.
 745
 746 This function works on TeX compilations only.  It is necessary for
 747 that purpose, since TeX does not put file names on the same line as
 748 line numbers for the errors."
 749   (setq compilation-error-list nil)
 750   (message "Parsing error messages...")
 751   (modify-syntax-entry ?\{ "_")
 752   (modify-syntax-entry ?\} "_")
 753   (modify-syntax-entry ?\[ "_")
 754   (modify-syntax-entry ?\] "_")
 755   (let (text-buffer
 756         last-filename last-linenum)
 757     ;; Don't reparse messages already seen at last parse.
 758     (goto-char compilation-parsing-end)
 759     ;; Don't parse the first two lines as error messages.
 760     ;; This matters for grep.
 761     (if (bobp)
 762         (forward-line 2))
 763     (while (re-search-forward "^l\.[0-9]+ " nil t)
 764       (let (linenum filename
 765             error-marker text-marker)
 766         ;; Extract file name and line number from error message.
 767         ;; Line number is 2 away from beginning of line: "l.23"
 768         (beginning-of-line)
 769         (goto-char (+ (point) 2))
 770         (setq linenum (read (current-buffer)))
 771         ;; The file is the one that was opened last and is still open.
 772         ;; We need to find the last open parenthesis.
 773         (insert ?\))
 774         (backward-sexp)
 775         (forward-char)
 776         (setq filename (current-word))
 777         ;; Locate the erring file and line.
 778         (if (and (equal filename last-filename)
 779                  (= linenum last-linenum))
 780             nil
 781           (skip-chars-backward "^(")
 782           (backward-char)
 783           (forward-sexp)
 784           (backward-delete-char 1)
 785           (setq error-marker (point-marker))
 786           ;; text-buffer gets the buffer containing this error's file.
 787           (if (not (equal filename last-filename))
 788               (setq text-buffer
 789                     (and (file-exists-p (setq last-filename filename))
 790                          (find-file-noselect filename))
 791                     last-linenum 0))
 792           (if text-buffer
 793               ;; Go to that buffer and find the erring line.
 794               (save-excursion
 795                 (set-buffer text-buffer)
 796                 (if (zerop last-linenum)
 797                     (progn
 798                       (goto-char 1)
 799                       (setq last-linenum 1)))
 800                 (forward-line (- linenum last-linenum))
 801                 (setq last-linenum linenum)
 802                 (setq text-marker (point-marker))
 803                 (setq compilation-error-list
 804                       (cons (list error-marker text-marker)
 805                             compilation-error-list)))))
 806         (forward-line 1)))
 807     (setq compilation-parsing-end (point-max)))
 808   (message "Parsing error messages...done")
 809   (setq compilation-error-list (nreverse compilation-error-list)))
 810 \f
 811 ;;; Invoking TeX in an inferior shell.
 812
 813 ;;; Why use a shell instead of running TeX directly?  Because if TeX
 814 ;;; gets stuck, the user can switch to the shell window and type at it.
 815
 816 ;;; The utility functions:
 817
 818 ;;;###autoload
 819 (defun tex-start-shell ()
 820   (save-excursion
 821     (set-buffer
 822      (make-comint
 823       "tex-shell"
 824       (or tex-shell-file-name (getenv "ESHELL") (getenv "SHELL") "/bin/sh")
 825       nil))
 826     (let ((proc (get-process "tex-shell")))
 827       (set-process-sentinel proc 'tex-shell-sentinel)
 828       (process-kill-without-query proc)
 829       (setq comint-prompt-regexp shell-prompt-pattern)
 830       (setq tex-shell-map (nconc (make-sparse-keymap) shell-mode-map))
 831       (tex-define-common-keys tex-shell-map)
 832       (use-local-map tex-shell-map)
 833       (run-hooks 'tex-shell-hook)
 834       (while (zerop (buffer-size))
 835         (sleep-for 1)))))
 836
 837 (defun tex-display-shell ()
 838   "Make the TeX shell buffer visible in a window."
 839   (display-buffer (process-buffer (get-process "tex-shell")))
 840   (tex-recenter-output-buffer nil))
 841
 842 (defun tex-shell-sentinel (proc msg)
 843   (cond ((null (buffer-name (process-buffer proc)))
 844          ;; buffer killed
 845          (set-process-buffer proc nil)
 846          (tex-delete-last-temp-files))
 847         ((memq (process-status proc) '(signal exit))
 848          (tex-delete-last-temp-files))))
 849
 850 (defun tex-set-buffer-directory (buffer directory)
 851   "Set BUFFER's default directory to be DIRECTORY."
 852   (setq directory (file-name-as-directory (expand-file-name directory)))
 853   (if (not (file-directory-p directory))
 854       (error "%s is not a directory" directory)
 855     (save-excursion
 856       (set-buffer buffer)
 857       (setq default-directory directory))))
 858
 859 (defvar tex-send-command-modified-tick 0)
 860 (make-variable-buffer-local 'tex-send-command-modified-tick)
 861
 862 (defun tex-send-command (command &optional file background)
 863   "Send COMMAND to TeX shell process, substituting optional FILE for *.
 864 Do this in background if optional BACKGROUND is t.  If COMMAND has no *,
 865 FILE will be appended, preceded by a blank, to COMMAND.  If FILE is nil, no
 866 substitution will be made in COMMAND.  COMMAND can be any expression that
 867 evaluates to a command string."
 868   (save-excursion
 869     (let* ((cmd (eval command))
 870            (proc (get-process "tex-shell"))
 871            (buf (process-buffer proc))
 872            (star (string-match "\\*" cmd))
 873            (string
 874             (concat
 875              (if file
 876                  (if star (concat (substring cmd 0 star)
 877                                   file (substring cmd (1+ star)))
 878                    (concat cmd " " file))
 879                cmd)
 880              (if background "&" ""))))
 881       ;; Switch to buffer before checking for subproc output in it.
 882       (set-buffer buf)
 883       ;; If text is unchanged since previous tex-send-command,
 884       ;; we haven't got any output.  So wait for output now.
 885       (if (= (buffer-modified-tick buf) tex-send-command-modified-tick)
 886           (accept-process-output proc))
 887       (goto-char (process-mark proc))
 888       (insert string)
 889       (comint-send-input)
 890       (setq tex-send-command-modified-tick (buffer-modified-tick buf)))))
 891
 892 (defun tex-delete-last-temp-files (&optional not-all)
 893   "Delete any junk files from last temp file.
 894 If NOT-ALL is non-nil, save the `.dvi' file."
 895   (if tex-last-temp-file
 896       (let* ((dir (file-name-directory tex-last-temp-file))
 897              (list (and (file-directory-p dir)
 898                         (file-name-all-completions
 899                          (file-name-nondirectory tex-last-temp-file) dir))))
 900         (while list
 901           (if not-all
 902               (and
 903                ;; If arg is non-nil, don't delete the .dvi file.
 904                (not (string-match "\\.dvi$" (car list)))
 905                (delete-file (concat dir (car list))))
 906             (delete-file (concat dir (car list))))
 907           (setq list (cdr list))))))
 908
 909 (add-hook 'kill-emacs-hook 'tex-delete-last-temp-files)
 910
 911 ;;; The commands:
 912
 913 (defun tex-region (beg end)
 914   "Run TeX on the current region, via a temporary file.
 915 The file's name comes from the variable `tex-zap-file' and the
 916 variable `tex-directory' says where to put it.
 917
 918 If the buffer has a header, the header is given to TeX before the
 919 region itself.  The buffer's header is all lines between the strings
 920 defined by `tex-start-of-header' and `tex-end-of-header' inclusive.
 921 The header must start in the first 100 lines of the buffer.
 922
 923 The value of `tex-trailer' is given to TeX as input after the region.
 924
 925 The value of `tex-command' specifies the command to use to run TeX."
 926   (interactive "r")
 927   (if (tex-shell-running)
 928       (tex-kill-job)
 929     (tex-start-shell))
 930   (or tex-zap-file
 931       (setq tex-zap-file (tex-generate-zap-file-name)))
 932   (let* ((temp-buffer (get-buffer-create " TeX-Output-Buffer"))
 933          ; Temp file will be written and TeX will be run in zap-directory.
 934          ; If the TEXINPUTS file has relative directories or if the region has
 935          ; \input of files, this must be the same directory as the file for
 936          ; TeX to access the correct inputs.  That's why it's safest if
 937          ; tex-directory is ".".
 938          (zap-directory
 939           (file-name-as-directory (expand-file-name tex-directory)))
 940          (tex-out-file (concat zap-directory tex-zap-file)))
 941     ;; Don't delete temp files if we do the same buffer twice in a row.
 942     (or (eq (current-buffer) tex-last-buffer-texed)
 943         (tex-delete-last-temp-files t))
 944     ;; Write the new temp file.
 945     (save-excursion
 946       (save-restriction
 947         (widen)
 948         (goto-char (point-min))
 949         (forward-line 100)
 950         (let ((search-end (point))
 951               (hbeg (point-min)) (hend (point-min))
 952               (default-directory zap-directory))
 953           (goto-char (point-min))
 954           ;; Initialize the temp file with either the header or nothing
 955           (if (search-forward tex-start-of-header search-end t)
 956               (progn
 957                 (beginning-of-line)
 958                 (setq hbeg (point))     ;mark beginning of header
 959                 (if (search-forward tex-end-of-header nil t)
 960                     (progn (forward-line 1)
 961                            (setq hend (point))) ;mark end of header
 962                   (setq hbeg (point-min))))) ;no header
 963           (write-region (min hbeg beg) hend
 964                         (concat tex-out-file ".tex") nil nil)
 965           (write-region (max beg hend) end (concat tex-out-file ".tex") t nil))
 966         (let ((local-tex-trailer tex-trailer))
 967           (set-buffer temp-buffer)
 968           (erase-buffer)
 969           ;; make sure trailer isn't hidden by a comment
 970           (insert-string "\n")
 971           (if local-tex-trailer (insert-string local-tex-trailer))
 972           (tex-set-buffer-directory temp-buffer zap-directory)
 973           (write-region (point-min) (point-max)
 974                         (concat tex-out-file ".tex") t nil))))
 975     ;; Record the file name to be deleted afterward.
 976     (setq tex-last-temp-file tex-out-file)
 977     (tex-send-command tex-shell-cd-command zap-directory)
 978     (tex-send-command tex-command tex-out-file)
 979     (tex-display-shell)
 980     (setq tex-print-file tex-out-file)
 981     (setq tex-last-buffer-texed (current-buffer))))
 982
 983 (defun tex-buffer ()
 984   "Run TeX on current buffer.  See \\[tex-region] for more information.
 985 Does not save the buffer, so it's useful for trying experimental versions.
 986 See \\[tex-file] for an alternative."
 987   (interactive)
 988   (tex-region (point-min) (point-max)))
 989
 990 (defun tex-file ()
 991   "Prompt to save all buffers and run TeX (or LaTeX) on current buffer's file.
 992 This function is more useful than \\[tex-buffer] when you need the
 993 `.aux' file of LaTeX to have the correct name."
 994   (interactive)
 995   (let ((tex-out-file
 996          (if (buffer-file-name)
 997              (file-name-nondirectory (buffer-file-name))
 998            (error "Buffer does not seem to be associated with any file")))
 999         (file-dir (file-name-directory (buffer-file-name))))
1000     (if tex-offer-save
1001         (save-some-buffers))
1002     (if (tex-shell-running)
1003         (tex-kill-job)
1004       (tex-start-shell))
1005     (tex-send-command tex-shell-cd-command file-dir)
1006     (tex-send-command tex-command tex-out-file))
1007   (tex-display-shell)
1008   (setq tex-last-buffer-texed (current-buffer))
1009   (setq tex-print-file (buffer-file-name)))
1010
1011 (defun tex-generate-zap-file-name ()
1012   "Generate a unique name suitable for use as a file name."
1013   ;; Include the shell process number and host name
1014   ;; in case there are multiple shells (for same or different user).
1015   (format "#tz%d%s"
1016           (process-id (get-buffer-process "*tex-shell*"))
1017           (tex-strip-dots (system-name))))
1018
1019 (defun tex-strip-dots (s)
1020   (setq s (copy-sequence s))
1021   (while (string-match "\\." s)
1022     (aset s (match-beginning 0) ?-))
1023   s)
1024
1025 ;; This will perhaps be useful for modifying TEXINPUTS.
1026 ;; Expand each file name, separated by colons, in the string S.
1027 (defun tex-expand-files (s)
1028   (let (elts (start 0))
1029     (while (string-match ":" s start)
1030       (setq elts (cons (substring s start (match-beginning 0)) elts))
1031       (setq start (match-end 0)))
1032     (or (= start 0)
1033         (setq elts (cons (substring s start) elts)))
1034     (mapconcat 'expand-file-name (nreverse elts) ":")))
1035
1036 (defun tex-shell-running ()
1037   (and (get-process "tex-shell")
1038        (eq (process-status (get-process "tex-shell")) 'run)))
1039
1040 (defun tex-kill-job ()
1041   "Kill the currently running TeX job."
1042   (interactive)
1043   (quit-process (get-process "tex-shell") t))
1044
1045 (defun tex-recenter-output-buffer (linenum)
1046   "Redisplay buffer of TeX job output so that most recent output can be seen.
1047 The last line of the buffer is displayed on
1048 line LINE of the window, or centered if LINE is nil."
1049   (interactive "P")
1050   (let ((tex-shell (get-buffer "*tex-shell*"))
1051         (old-buffer (current-buffer)))
1052     (if (null tex-shell)
1053         (message "No TeX output buffer")
1054       (pop-to-buffer tex-shell)
1055       (bury-buffer tex-shell)
1056       (goto-char (point-max))
1057       (recenter (if linenum
1058                     (prefix-numeric-value linenum)
1059                   (/ (window-height) 2)))
1060       (pop-to-buffer old-buffer))))
1061
1062 (defun tex-print (&optional alt)
1063   "Print the .dvi file made by \\[tex-region], \\[tex-buffer] or \\[tex-file].
1064 Runs the shell command defined by `tex-dvi-print-command'.  If prefix argument
1065 is provided, use the alternative command, `tex-alt-dvi-print-command'."
1066   (interactive "P")
1067   (let ((print-file-name-dvi (tex-append tex-print-file ".dvi"))
1068         test-name)
1069     (if (and (not (equal (current-buffer) tex-last-buffer-texed))
1070              (buffer-file-name)
1071              ;; Check that this buffer's printed file is up to date.
1072              (file-newer-than-file-p
1073               (setq test-name (tex-append (buffer-file-name) ".dvi"))
1074               (buffer-file-name)))
1075         (setq print-file-name-dvi test-name))
1076     (if (not (file-exists-p print-file-name-dvi))
1077         (error "No appropriate `.dvi' file could be found")
1078       (tex-send-command
1079         (if alt tex-alt-dvi-print-command tex-dvi-print-command)
1080         print-file-name-dvi t))))
1081
1082 (defun tex-alt-print ()
1083   "Print the .dvi file made by \\[tex-region], \\[tex-buffer] or \\[tex-file].
1084 Runs the shell command defined by `tex-alt-dvi-print-command'."
1085   (interactive)
1086   (tex-print t))
1087
1088 (defun tex-view ()
1089   "Preview the last `.dvi' file made by running TeX under Emacs.
1090 This means, made using \\[tex-region], \\[tex-buffer] or \\[tex-file].
1091 The variable `tex-dvi-view-command' specifies the shell command for preview."
1092   (interactive)
1093   (let ((tex-dvi-print-command tex-dvi-view-command))
1094     (tex-print)))
1095
1096 (defun tex-append (file-name suffix)
1097   "Append to FILENAME the suffix SUFFIX, using same algorithm TeX uses.
1098 Pascal-based TeX scans for the first period, C TeX uses the last.
1099 No period is retained immediately before SUFFIX,
1100 so normally SUFFIX starts with one."
1101   (if (stringp file-name)
1102       (let ((file (file-name-nondirectory file-name))
1103             trial-name)
1104         ;; Try spliting on last period.
1105         ;; The first-period split can get fooled when two files
1106         ;; named a.tex and a.b.tex are both tex'd;
1107         ;; the last-period split must be right if it matches at all.
1108         (setq trial-name
1109               (concat (file-name-directory file-name)
1110                       (substring file 0
1111                                  (string-match "\\.[^.]*$" file))
1112                       suffix))
1113         (if (or (file-exists-p trial-name)
1114                 (file-exists-p (concat trial-name ".aux"))) ;for BibTeX files
1115             trial-name
1116           ;; Not found, so split on first period.
1117           (concat (file-name-directory file-name)
1118                   (substring file 0
1119                              (string-match "\\." file))
1120                   suffix)))
1121     " "))
1122
1123 (defun tex-show-print-queue ()
1124   "Show the print queue that \\[tex-print] put your job on.
1125 Runs the shell command defined by `tex-show-queue-command'."
1126   (interactive)
1127   (if (tex-shell-running)
1128       (tex-kill-job)
1129     (tex-start-shell))
1130   (tex-send-command tex-show-queue-command)
1131   (tex-display-shell))
1132
1133 (defun tex-bibtex-file ()
1134   "Run BibTeX on the current buffer's file."
1135   (interactive)
1136   (if (tex-shell-running)
1137       (tex-kill-job)
1138     (tex-start-shell))
1139   (let ((tex-out-file
1140          (tex-append (file-name-nondirectory (buffer-file-name)) ""))
1141         (file-dir (file-name-directory (buffer-file-name))))
1142     (tex-send-command tex-shell-cd-command file-dir)
1143     (tex-send-command tex-bibtex-command tex-out-file))
1144   (tex-display-shell))
1145
1146 (run-hooks 'tex-mode-load-hook)
1147
1148 (provide 'tex-mode)
1149
1150 ;;; tex-mode.el ends here
1151