tex-mode.el 35.2 KB
Newer Older
Eric S. Raymond's avatar
Eric S. Raymond committed
1 2
;;; tex-mode.el --- TeX, LaTeX, and SliTeX mode commands.

Eric S. Raymond's avatar
Eric S. Raymond committed
3 4
;; Copyright (C) 1985, 1986, 1989, 1992 Free Software Foundation, Inc.

Eric S. Raymond's avatar
Eric S. Raymond committed
5
;; Maintainer: Edward M. Reingold <reingold@cs.uiuc.edu>
Eric S. Raymond's avatar
Eric S. Raymond committed
6
;; Keywords: tex
Eric S. Raymond's avatar
Eric S. Raymond committed
7

8
;; Contributions over the years by William F. Schelter, Dick King,
9
;; Stephen Gildea, Michael Prange, and Jacob Gore.
10

root's avatar
root committed
11 12 13 14
;; This file is part of GNU Emacs.

;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
Eric S. Raymond's avatar
Eric S. Raymond committed
15
;; the Free Software Foundation; either version 2, or (at your option)
root's avatar
root committed
16 17 18 19 20 21 22 23 24 25 26
;; any later version.

;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING.  If not, write to
;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.

Eric S. Raymond's avatar
Eric S. Raymond committed
27 28
;;; Code:

29 30
;; This was a pain.  Now, make-comint should autoload comint.
;; (require 'comint)
31
(require 'compile)
32

Jim Blandy's avatar
Jim Blandy committed
33
;;;###autoload
34 35 36
(defvar tex-shell-file-name nil
  "*If non-nil, is file name to use for the subshell in which TeX is run.")

Jim Blandy's avatar
Jim Blandy committed
37
;;;###autoload
38 39 40 41 42
(defvar tex-directory "."
  "*Directory in which temporary files are left.
You can make this /tmp if your TEXINPUTS has no relative directories in it
and you don't try to apply \\[tex-region] or \\[tex-buffer] when there are
\\input commands with relative directories.")
root's avatar
root committed
43

Jim Blandy's avatar
Jim Blandy committed
44
;;;###autoload
45 46
(defvar tex-offer-save t
  "*If non-nil, ask about saving modified buffers before \\[tex-file] is run.")
root's avatar
root committed
47

Jim Blandy's avatar
Jim Blandy committed
48
;;;###autoload
root's avatar
root committed
49 50
(defvar tex-run-command "tex"
  "*Command used to run TeX subjob.
51 52 53
If this string contains an asterisk (*), it will be replaced by the
filename; if not, the name of the file, preceded by blank, will be added to
this string.")
root's avatar
root committed
54

Jim Blandy's avatar
Jim Blandy committed
55
;;;###autoload
root's avatar
root committed
56 57
(defvar latex-run-command "latex"
  "*Command used to run LaTeX subjob.
58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73
If this string contains an asterisk (*), it will be replaced by the
filename; if not, the name of the file, preceded by blank, will be added to
this string.")

(defvar standard-latex-block-names
      '("abstract"         "array"            "center"       "description"
        "displaymath"      "document"         "enumerate"    "eqnarray"
        "eqnarray*"        "equation"         "figure"       "figure*"
        "flushleft"        "flushright"       "itemize"      "letter"
        "list"             "minipage"         "picture"      "quotation"
        "quote"            "slide"            "sloppypar"     "tabbing"
        "table"            "table*"           "tabular"       "tabular*"
        "thebibliography"  "theindex*"        "titlepage"     "trivlist"
        "verbatim"         "verbatim*"        "verse")
  "Standard LaTeX block names.")

Jim Blandy's avatar
Jim Blandy committed
74
;;;###autoload
75 76 77
(defvar latex-block-names nil
  "*User defined LaTeX block names.
Combined with `standard-latex-block-names' for minibuffer completion.")
root's avatar
root committed
78

Jim Blandy's avatar
Jim Blandy committed
79
;;;###autoload
root's avatar
root committed
80 81
(defvar slitex-run-command "slitex"
  "*Command used to run SliTeX subjob.
82 83 84
If this string contains an asterisk (*), it will be replaced by the
filename; if not, the name of the file, preceded by blank, will be added to
this string.")
root's avatar
root committed
85

Jim Blandy's avatar
Jim Blandy committed
86
;;;###autoload
root's avatar
root committed
87
(defvar tex-bibtex-command "bibtex"
88 89 90 91
  "*Command used by `tex-bibtex-file' to gather bibliographic data.
If this string contains an asterisk (*), it will be replaced by the
filename; if not, the name of the file, preceded by blank, will be added to
this string.")
root's avatar
root committed
92

Jim Blandy's avatar
Jim Blandy committed
93
;;;###autoload
root's avatar
root committed
94
(defvar tex-dvi-print-command "lpr -d"
95 96 97 98 99
  "*Command used by \\[tex-print] to print a .dvi file.
If this string contains an asterisk (*), it will be replaced by the
filename; if not, the name of the file, preceded by blank, will be added to
this string.")

Jim Blandy's avatar
Jim Blandy committed
100
;;;###autoload
101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
(defvar tex-alt-dvi-print-command "lpr -d"
  "*Command used by \\[tex-print] with a prefix arg to print a .dvi file.
If this string contains an asterisk (*), it will be replaced by the
filename; if not, the name of the file, preceded by blank, will be added to
this string.

If two printers are not enough of a choice, you can define the value
of tex-alt-dvi-print-command to be an expression that asks what you want;
for example,

    (setq tex-alt-dvi-print-command
         '(format \"lpr -P%s\" (read-string \"Use printer: \")))

would tell \\[tex-print] with a prefix argument to ask you which printer to
use.")
root's avatar
root committed
116

Jim Blandy's avatar
Jim Blandy committed
117
;;;###autoload
root's avatar
root committed
118
(defvar tex-dvi-view-command nil
119 120 121 122 123 124 125 126 127 128 129 130 131
  "*Command used by \\[tex-view] to display a .dvi file.
If this string contains an asterisk (*), it will be replaced by the
filename; if not, the name of the file, preceded by blank, will be added to
this string.

This can be set conditionally so that the previewer used is suitable for the
window system being used.  For example,

    (setq tex-dvi-view-command
          (if (eq window-system 'x) \"xdvi\" \"dvi2tty * | cat -s\"))

would tell \\[tex-view] use xdvi under X windows and to use dvi2tty
otherwise.")
root's avatar
root committed
132

Jim Blandy's avatar
Jim Blandy committed
133
;;;###autoload
root's avatar
root committed
134
(defvar tex-show-queue-command "lpq"
135 136
  "*Command used by \\[tex-show-print-queue] to show the print queue.
Should show the queue(s) that \\[tex-print] puts jobs on.")
root's avatar
root committed
137

Jim Blandy's avatar
Jim Blandy committed
138
;;;###autoload
root's avatar
root committed
139 140 141 142 143 144
(defvar tex-default-mode 'plain-tex-mode
  "*Mode to enter for a new file that might be either TeX or LaTeX.
This variable is used when it can't be determined whether the file
is plain TeX or LaTeX or what because the file contains no commands.
Normally set to either 'plain-tex-mode or 'latex-mode.")

Jim Blandy's avatar
Jim Blandy committed
145
;;;###autoload
root's avatar
root committed
146 147 148
(defvar tex-open-quote "``"
  "*String inserted by typing \\[tex-insert-quote] to open a quotation.")

Jim Blandy's avatar
Jim Blandy committed
149
;;;###autoload
root's avatar
root committed
150 151 152
(defvar tex-close-quote "''"
  "*String inserted by typing \\[tex-insert-quote] to close a quotation.")

153 154 155 156 157
(defvar tex-last-temp-file nil
  "Latest temporary file generated by \\[tex-region] and \\[tex-buffer].
Deleted when the \\[tex-region] or \\[tex-buffer] is next run, or when the
tex-shell goes away.")

root's avatar
root committed
158 159
(defvar tex-command nil
  "Command to run TeX.
160
The name of the file, preceded by a blank, will be added to this string.")
root's avatar
root committed
161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215

(defvar tex-trailer nil
  "String appended after the end of a region sent to TeX by \\[tex-region].")

(defvar tex-start-of-header nil
  "String used by \\[tex-region] to delimit the start of the file's header.")

(defvar tex-end-of-header nil
  "String used by \\[tex-region] to delimit the end of the file's header.")

(defvar tex-shell-cd-command "cd"
  "Command to give to shell running TeX to change directory.
The value of tex-directory will be appended to this, separated by a space.")

(defvar tex-zap-file nil
  "Temporary file name used for text being sent as input to TeX.
Should be a simple file name with no extension or directory specification.")

(defvar tex-last-buffer-texed nil
  "Buffer which was last TeXed.")

(defvar tex-print-file nil
  "File name that \\[tex-print] prints.
Set by \\[tex-region], \\[tex-buffer], and \\[tex-file].")

(defvar tex-mode-syntax-table nil
  "Syntax table used while in TeX mode.")

(defun tex-define-common-keys (keymap)
  "Define the keys that we want defined both in TeX mode and in the tex-shell."
  (define-key keymap "\C-c\C-k" 'tex-kill-job)
  (define-key keymap "\C-c\C-l" 'tex-recenter-output-buffer)
  (define-key keymap "\C-c\C-q" 'tex-show-print-queue)
  (define-key keymap "\C-c\C-p" 'tex-print)
  (define-key keymap "\C-c\C-v" 'tex-view)
  )

(defvar tex-mode-map nil "Keymap for TeX mode.")

(if tex-mode-map 
    nil
  (setq tex-mode-map (make-sparse-keymap))
  (tex-define-common-keys tex-mode-map)
  (define-key tex-mode-map "\"" 'tex-insert-quote)
  (define-key tex-mode-map "\n" 'tex-terminate-paragraph)
  (define-key tex-mode-map "\C-c}" 'up-list)
  (define-key tex-mode-map "\C-c{" 'tex-insert-braces)
  (define-key tex-mode-map "\C-c\C-r" 'tex-region)
  (define-key tex-mode-map "\C-c\C-b" 'tex-buffer)
  (define-key tex-mode-map "\C-c\C-f" 'tex-file)
  (define-key tex-mode-map "\C-c\C-i" 'tex-bibtex-file)
  (define-key tex-mode-map "\C-c\C-o" 'tex-latex-block)
  (define-key tex-mode-map "\C-c\C-e" 'tex-close-latex-block))

(defvar tex-shell-map nil
216
  "Keymap for the tex-shell.  A comint-mode-map with a few additions.")
root's avatar
root committed
217

218
;(defalias 'TeX-mode 'tex-mode) 		;in loaddefs.
root's avatar
root committed
219 220 221

;;; This would be a lot simpler if we just used a regexp search,
;;; but then it would be too slow.
Roland McGrath's avatar
Roland McGrath committed
222
;;;###autoload
root's avatar
root committed
223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246
(defun tex-mode ()
  "Major mode for editing files of input for TeX, LaTeX, or SliTeX.
Tries to determine (by looking at the beginning of the file) whether
this file is for plain TeX, LaTeX, or SliTeX and calls plain-tex-mode,
latex-mode, or slitex-mode, respectively.  If it cannot be determined,
such as if there are no commands in the file, the value of tex-default-mode
is used."
  (interactive)
  (let (mode slash comment)
    (save-excursion
      (goto-char (point-min))
      (while (and (setq slash (search-forward "\\" nil t))
		  (setq comment (let ((search-end (point)))
				  (save-excursion
				    (beginning-of-line)
				    (search-forward "%" search-end t))))))
      (if (and slash (not comment))
	  (setq mode (if (looking-at "documentstyle")
                         (if (looking-at "documentstyle{slides}")
                             'slitex-mode
                           'latex-mode)
		       'plain-tex-mode))))
    (if mode (funcall mode)
      (funcall tex-default-mode))))
Jim Blandy's avatar
Jim Blandy committed
247
;;;###autoload
248
(defalias 'TeX-mode 'tex-mode)
Jim Blandy's avatar
Jim Blandy committed
249
;;;###autoload
250
(defalias 'LaTeX-mode 'latex-mode)
root's avatar
root committed
251

Roland McGrath's avatar
Roland McGrath committed
252
;;;###autoload
root's avatar
root committed
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
(defun plain-tex-mode ()
  "Major mode for editing files of input for plain TeX.
Makes $ and } display the characters they match.
Makes \" insert `` when it seems to be the beginning of a quotation,
and '' when it appears to be the end; it inserts \" only after a \\.

Use \\[tex-region] to run TeX on the current region, plus a \"header\"
copied from the top of the file (containing macro definitions, etc.),
running TeX under a special subshell.  \\[tex-buffer] does the whole buffer.
\\[tex-file] saves the buffer and then processes the file.
\\[tex-print] prints the .dvi file made by any of these.
\\[tex-view] previews the .dvi file made by any of these.
\\[tex-bibtex-file] runs bibtex on the file of the current buffer.

Use \\[validate-tex-buffer] to check buffer for paragraphs containing
mismatched $'s or braces.

Special commands:
\\{tex-mode-map}

Mode variables:
tex-run-command
	Command string used by \\[tex-region] or \\[tex-buffer].
tex-directory
	Directory in which to create temporary files for TeX jobs
	run by \\[tex-region] or \\[tex-buffer].
tex-dvi-print-command
	Command string used by \\[tex-print] to print a .dvi file.
281 282 283
tex-alt-dvi-print-command
	Alternative command string used by \\[tex-print] (when given a prefix
	argument) to print a .dvi file.
root's avatar
root committed
284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301
tex-dvi-view-command
	Command string used by \\[tex-view] to preview a .dvi file.
tex-show-queue-command
	Command string used by \\[tex-show-print-queue] to show the print
	queue that \\[tex-print] put your job on.

Entering Plain-tex mode calls the value of text-mode-hook, then the value of
tex-mode-hook, and then the value of plain-tex-mode-hook.  When the special
subshell is initiated, the value of tex-shell-hook is called."
  (interactive)
  (tex-common-initialization)
  (setq mode-name "TeX")
  (setq major-mode 'plain-tex-mode)
  (setq tex-command tex-run-command)
  (setq tex-start-of-header "%**start of header")
  (setq tex-end-of-header "%**end of header")
  (setq tex-trailer "\\bye\n")
  (run-hooks 'text-mode-hook 'tex-mode-hook 'plain-tex-mode-hook))
Jim Blandy's avatar
Jim Blandy committed
302
;;;###autoload
303
(defalias 'plain-TeX-mode 'plain-tex-mode)
root's avatar
root committed
304

Roland McGrath's avatar
Roland McGrath committed
305
;;;###autoload
root's avatar
root committed
306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333
(defun latex-mode ()
  "Major mode for editing files of input for LaTeX.
Makes $ and } display the characters they match.
Makes \" insert `` when it seems to be the beginning of a quotation,
and '' when it appears to be the end; it inserts \" only after a \\.

Use \\[tex-region] to run LaTeX on the current region, plus the preamble
copied from the top of the file (containing \\documentstyle, etc.),
running LaTeX under a special subshell.  \\[tex-buffer] does the whole buffer.
\\[tex-file] saves the buffer and then processes the file.
\\[tex-print] prints the .dvi file made by any of these.
\\[tex-view] previews the .dvi file made by any of these.
\\[tex-bibtex-file] runs bibtex on the file of the current buffer.

Use \\[validate-tex-buffer] to check buffer for paragraphs containing
mismatched $'s or braces.

Special commands:
\\{tex-mode-map}

Mode variables:
latex-run-command
	Command string used by \\[tex-region] or \\[tex-buffer].
tex-directory
	Directory in which to create temporary files for LaTeX jobs
	run by \\[tex-region] or \\[tex-buffer].
tex-dvi-print-command
	Command string used by \\[tex-print] to print a .dvi file.
334 335 336
tex-alt-dvi-print-command
	Alternative command string used by \\[tex-print] (when given a prefix
	argument) to print a .dvi file.
root's avatar
root committed
337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383
tex-dvi-view-command
	Command string used by \\[tex-view] to preview a .dvi file.
tex-show-queue-command
	Command string used by \\[tex-show-print-queue] to show the print
	queue that \\[tex-print] put your job on.

Entering Latex mode calls the value of text-mode-hook, then the value of
tex-mode-hook, and then the value of latex-mode-hook.  When the special
subshell is initiated, the value of tex-shell-hook is called."
  (interactive)
  (tex-common-initialization)
  (setq mode-name "LaTeX")
  (setq major-mode 'latex-mode)
  (setq tex-command latex-run-command)
  (setq tex-start-of-header "\\documentstyle")
  (setq tex-end-of-header "\\begin{document}")
  (setq tex-trailer "\\end{document}\n")
  (run-hooks 'text-mode-hook 'tex-mode-hook 'latex-mode-hook))

(defun slitex-mode ()
  "Major mode for editing files of input for SliTeX.
Makes $ and } display the characters they match.
Makes \" insert `` when it seems to be the beginning of a quotation,
and '' when it appears to be the end; it inserts \" only after a \\.

Use \\[tex-region] to run SliTeX on the current region, plus the preamble
copied from the top of the file (containing \\documentstyle, etc.),
running SliTeX under a special subshell.  \\[tex-buffer] does the whole buffer.
\\[tex-file] saves the buffer and then processes the file.
\\[tex-print] prints the .dvi file made by any of these.
\\[tex-view] previews the .dvi file made by any of these.
\\[tex-bibtex-file] runs bibtex on the file of the current buffer.

Use \\[validate-tex-buffer] to check buffer for paragraphs containing
mismatched $'s or braces.

Special commands:
\\{tex-mode-map}

Mode variables:
slitex-run-command
	Command string used by \\[tex-region] or \\[tex-buffer].
tex-directory
	Directory in which to create temporary files for SliTeX jobs
	run by \\[tex-region] or \\[tex-buffer].
tex-dvi-print-command
	Command string used by \\[tex-print] to print a .dvi file.
384 385 386
tex-alt-dvi-print-command
	Alternative command string used by \\[tex-print] (when given a prefix
	argument) to print a .dvi file.
root's avatar
root committed
387 388 389 390 391 392
tex-dvi-view-command
	Command string used by \\[tex-view] to preview a .dvi file.
tex-show-queue-command
	Command string used by \\[tex-show-print-queue] to show the print
	queue that \\[tex-print] put your job on.

393
Entering SliTeX mode calls the value of text-mode-hook, then the value of
root's avatar
root committed
394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440
tex-mode-hook, then the value of latex-mode-hook, and then the value of
slitex-mode-hook.  When the special subshell is initiated, the value of
tex-shell-hook is called."
  (interactive)
  (tex-common-initialization)
  (setq mode-name "SliTeX")
  (setq major-mode 'slitex-mode)
  (setq tex-command slitex-run-command)
  (setq tex-start-of-header "\\documentstyle{slides}")
  (setq tex-end-of-header "\\begin{document}")
  (setq tex-trailer "\\end{document}\n")
  (run-hooks
   'text-mode-hook 'tex-mode-hook 'latex-mode-hook 'slitex-mode-hook))

(defun tex-common-initialization ()
  (kill-all-local-variables)
  (use-local-map tex-mode-map)
  (setq local-abbrev-table text-mode-abbrev-table)
  (if (null tex-mode-syntax-table)
      (let ((char 0))
	(setq tex-mode-syntax-table (make-syntax-table))
	(set-syntax-table tex-mode-syntax-table)
	(while (< char ? )
	  (modify-syntax-entry char ".")
	  (setq char (1+ char)))
	(modify-syntax-entry ?\C-@ "w")
	(modify-syntax-entry ?\t " ")
	(modify-syntax-entry ?\n ">")
	(modify-syntax-entry ?\f ">")
	(modify-syntax-entry ?$ "$$")
	(modify-syntax-entry ?% "<")
	(modify-syntax-entry ?\\ "/")
	(modify-syntax-entry ?\" ".")
	(modify-syntax-entry ?& ".")
	(modify-syntax-entry ?_ ".")
	(modify-syntax-entry ?@ "_")
	(modify-syntax-entry ?~ " ")
	(modify-syntax-entry ?' "w"))
    (set-syntax-table tex-mode-syntax-table))
  (make-local-variable 'paragraph-start)
  (setq paragraph-start "^[ \t]*$\\|^[\f\\\\%]")
  (make-local-variable 'paragraph-separate)
  (setq paragraph-separate paragraph-start)
  (make-local-variable 'comment-start)
  (setq comment-start "%")
  (make-local-variable 'comment-start-skip)
  (setq comment-start-skip "\\(\\(^\\|[^\\]\\)\\(\\\\\\\\\\)*\\)\\(%+ *\\)")
441 442
  (make-local-variable 'comment-indent-function)
  (setq comment-indent-function 'tex-comment-indent)
root's avatar
root committed
443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491
  (make-local-variable 'compare-windows-whitespace)
  (setq compare-windows-whitespace 'tex-categorize-whitespace)
  (make-local-variable 'tex-command)
  (make-local-variable 'tex-start-of-header)
  (make-local-variable 'tex-end-of-header)
  (make-local-variable 'tex-trailer))

(defun tex-comment-indent ()
  (if (looking-at "%%%")
      (current-column)
    (skip-chars-backward " \t")
    (max (if (bolp) 0 (1+ (current-column)))
	 comment-column)))

(defun tex-categorize-whitespace (backward-limit)
  ;; compare-windows-whitespace is set to this.
  ;; This is basically a finite-state machine.
  ;; Returns a symbol telling how TeX would treat
  ;; the whitespace we are looking at: null, space, or par.
  (let ((category 'null)
	(not-finished t))
    (skip-chars-backward " \t\n\f" backward-limit)
    (while not-finished
      (cond ((looking-at "[ \t]+")
	     (goto-char (match-end 0))
	     (if (eql category 'null)
		 (setq category 'space)))
	    ((looking-at "\n")
	     (cond ((eql category 'newline)
		    (setq category 'par)
		    (setq not-finished nil))
		   (t
		    (setq category 'newline) ;a strictly internal state
		    (goto-char (match-end 0)))))
	    ((looking-at "\f+")
	     (setq category 'par)
	     (setq not-finished nil))
	    (t
	     (setq not-finished nil))))
    (skip-chars-forward " \t\n\f")
    (if (eql category 'newline)
	'space				;TeX doesn't distinguish
      category)))

(defun tex-insert-quote (arg)
  "Insert the appropriate quote marks for TeX.
Inserts the value of tex-open-quote (normally ``) or tex-close-quote
(normally '') depending on the context.  With prefix argument, always
inserts \" characters."
492
  (interactive "*P")
root's avatar
root committed
493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550
  (if arg
      (self-insert-command (prefix-numeric-value arg))
    (insert
     (cond ((or (bobp)
		(save-excursion
		  (forward-char -1)
		  (looking-at "\\s(\\|\\s \\|\\s>")))
	    tex-open-quote)
	   ((= (preceding-char) ?\\)
	    ?\")
	   (t
	    tex-close-quote)))))

(defun validate-tex-buffer ()
  "Check current buffer for paragraphs containing mismatched $'s.
As each such paragraph is found, a mark is pushed at its beginning,
and the location is displayed for a few seconds."
  (interactive)
  (let ((opoint (point)))
    (goto-char (point-max))
    ;; Does not use save-excursion
    ;; because we do not want to save the mark.
    (unwind-protect
	(while (and (not (input-pending-p)) (not (bobp)))
	  (let ((end (point)))
	    (search-backward "\n\n" nil 'move)
	    (or (tex-validate-region (point) end)
		(progn
		  (push-mark (point))
		  (message "Mismatch found in pararaph starting here")
		  (sit-for 4)))))
      (goto-char opoint))))

(defun tex-validate-region (start end)
  "Check for mismatched braces or $'s in region.
Returns t if no mismatches.  Returns nil and moves point to suspect
area if a mismatch is found."
  (interactive "r")
  (let ((failure-point nil) (max-possible-sexps (- end start)))
    (save-excursion
      (condition-case ()
	  (save-restriction
	    (narrow-to-region start end)
	    (goto-char start)
	    (while (< 0 (setq max-possible-sexps (1- max-possible-sexps)))
	      (forward-sexp 1)))
	(error
	  (setq failure-point (point)))))
    (if failure-point
	(progn
	  (goto-char failure-point)
	  nil)
      t)))

(defun tex-terminate-paragraph (inhibit-validation)
  "Insert two newlines, breaking a paragraph for TeX.
Check for mismatched braces/$'s in paragraph being terminated.
A prefix arg inhibits the checking."
551
  (interactive "*P")
root's avatar
root committed
552 553 554 555 556 557 558 559 560 561 562 563
  (or inhibit-validation
      (save-excursion
	(tex-validate-region
	  (save-excursion
	    (search-backward "\n\n" nil 'move)
	    (point))
	  (point)))
      (message "Paragraph being closed appears to contain a mismatch"))
  (insert "\n\n"))

(defun tex-insert-braces ()
  "Make a pair of braces and be poised to type inside of them."
564
  (interactive "*")
root's avatar
root committed
565 566 567 568 569 570 571 572
  (insert ?\{)
  (save-excursion
    (insert ?})))

;;; Like tex-insert-braces, but for LaTeX.
(defun tex-latex-block (name)
  "Creates a matching pair of lines \\begin{NAME} and \\end{NAME} at point.
Puts point on a blank line between them."
573 574 575 576 577 578 579 580
  (interactive
   (prog2
      (barf-if-buffer-read-only)
      (list
       (completing-read "LaTeX block name: "
			(mapcar 'list
                                (append standard-latex-block-names
                                        latex-block-names))))))
root's avatar
root committed
581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601
  (let ((col (current-column)))
    (insert (format "\\begin{%s}\n" name))
    (indent-to col)
    (save-excursion
      (insert ?\n)
      (indent-to col)
      (insert-string (format "\\end{%s}" name))
      (if (eobp) (insert ?\n)))))

(defun tex-last-unended-begin ()
  "Leave point at the beginning of the last \\begin{...} that is unended."
  (while (and (re-search-backward "\\(\\\\begin\\s *{\\)\\|\\(\\\\end\\s *{\\)")
              (looking-at "\\\\end{"))
    (tex-last-unended-begin)))

(defun tex-close-latex-block ()
  "Creates an \\end{...} to match the last unclosed \\begin{...}."
  (interactive "*")
  (let ((new-line-needed (bolp))
	text indentation)
    (save-excursion
602
      (condition-case nil
root's avatar
root committed
603 604 605 606 607 608 609 610 611
          (tex-last-unended-begin)
        (error (error "Couldn't find unended \\begin")))
      (setq indentation (current-column))
      (re-search-forward "\\\\begin\\(\\s *{[^}\n]*}\\)")
      (setq text (buffer-substring (match-beginning 1) (match-end 1))))
    (indent-to indentation)
    (insert "\\end" text)
    (if new-line-needed (insert ?\n))))

612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686
(defun tex-compilation-parse-errors ()
  "Parse the current buffer as error messages.
This makes a list of error descriptors, compilation-error-list.
For each source-file, line-number pair in the buffer,
the source file is read in, and the text location is saved in
compilation-error-list.  The function next-error, assigned to
\\[next-error], takes the next error off the list and visits its location.

This function works on TeX compilations only.  It is necessary for
that purpose, since TeX does not put file names on the same line as
line numbers for the errors."
  (setq compilation-error-list nil)
  (message "Parsing error messages...")
  (modify-syntax-entry ?\{ "_")
  (modify-syntax-entry ?\} "_")
  (modify-syntax-entry ?\[ "_")
  (modify-syntax-entry ?\] "_")
  (make-variable-buffer-local 'compilation-error-regexp)
  (setq compilation-error-regexp "^l\.[0-9]+ ")
  (let (text-buffer
	last-filename last-linenum)
    ;; Don't reparse messages already seen at last parse.
    (goto-char compilation-parsing-end)
    ;; Don't parse the first two lines as error messages.
    ;; This matters for grep.
    (if (bobp)
	(forward-line 2))
    (while (re-search-forward compilation-error-regexp nil t)
      (let (linenum filename
	    error-marker text-marker)
	;; Extract file name and line number from error message.
	;; Line number is 2 away from beginning of line: "l.23"
	(beginning-of-line)
	(goto-char (+ (point) 2))
	(setq linenum (read (current-buffer)))
	;; The file is the one that was opened last and is still open.
	;; We need to find the last open parenthesis.
	(insert ?\))
	(backward-sexp)
	(forward-char)
	(setq filename (compilation-grab-filename))
	;; Locate the erring file and line.
	(if (and (equal filename last-filename)
		 (= linenum last-linenum))
	    nil
	  (skip-chars-backward "^(")
	  (backward-char)
	  (forward-sexp)
	  (backward-delete-char 1)
	  (setq error-marker (point-marker))
	  ;; text-buffer gets the buffer containing this error's file.
	  (if (not (equal filename last-filename))
	      (setq text-buffer
		    (and (file-exists-p (setq last-filename filename))
			 (find-file-noselect filename))
		    last-linenum 0))
	  (if text-buffer
	      ;; Go to that buffer and find the erring line.
	      (save-excursion
		(set-buffer text-buffer)
		(if (zerop last-linenum)
		    (progn
		      (goto-char 1)
		      (setq last-linenum 1)))
		(forward-line (- linenum last-linenum))
		(setq last-linenum linenum)
		(setq text-marker (point-marker))
		(setq compilation-error-list
		      (cons (list error-marker text-marker)
			    compilation-error-list)))))
	(forward-line 1)))
    (setq compilation-parsing-end (point-max)))
  (message "Parsing error messages...done")
  (setq compilation-error-list (nreverse compilation-error-list)))

root's avatar
root committed
687 688 689 690 691 692 693 694 695
;;; Invoking TeX in an inferior shell.

;;; Why use a shell instead of running TeX directly?  Because if TeX
;;; gets stuck, the user can switch to the shell window and type at it.

;;; The utility functions:

(defun tex-start-shell ()
  (save-excursion
696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719
    (set-buffer
     (make-comint
      "tex-shell"
      (or tex-shell-file-name (getenv "ESHELL") (getenv "SHELL") "/bin/sh")
      nil "-v"))
    (let ((proc (get-process "tex-shell")))
      (set-process-sentinel proc 'tex-shell-sentinel)
      (process-kill-without-query proc)
      (setq tex-shell-map (copy-keymap comint-mode-map))
      (tex-define-common-keys tex-shell-map)
      (use-local-map tex-shell-map)
      (run-hooks 'tex-shell-hook)
      (while (zerop (buffer-size))
          (sleep-for 1)))))

(defun tex-shell-sentinel (proc msg)
  (cond ((null (buffer-name (process-buffer proc)))
	 ;; buffer killed
	 (set-process-buffer proc nil)
         (tex-delete-last-temp-files))
	((memq (process-status proc) '(signal exit))
         (tex-delete-last-temp-files))))

(defun tex-set-buffer-directory (buffer directory)
root's avatar
root committed
720 721 722 723 724 725 726 727
  "Set BUFFER's default directory to be DIRECTORY."
  (setq directory (file-name-as-directory (expand-file-name directory)))
  (if (not (file-directory-p directory))
      (error "%s is not a directory" directory)
    (save-excursion
      (set-buffer buffer)
      (setq default-directory directory))))

728 729 730 731 732 733 734
(defun tex-send-command (command &optional file background)
  "Send COMMAND to tex-shell, substituting optional FILE for *; in background
if optional BACKGROUND is t.   If COMMAND has no *, FILE will be appended,
preceded by a blank, to COMMAND.  If FILE is nil, no substitution will be made
in COMMAND.  COMMAND can be any expression that evaluates to a command string."
  (save-excursion
    (let* ((cmd (eval command))
735 736 737
           (star (string-match "\\*" cmd))
           (front (substring cmd 0 star))
           (back (if star (substring cmd (1+ star)) "")))
738
      (comint-proc-query (get-process "tex-shell")
739 740 741 742 743
                         (concat
                          (if file (if star (concat front file back)
                                     (concat cmd " " file))
                            cmd)
                          (if background "&\n" "\n"))))))
744 745 746 747 748 749 750 751 752 753 754

(defun tex-delete-last-temp-files ()
  "Delete any junk files from last temp file."
  (if tex-last-temp-file
      (let* ((dir (file-name-directory tex-last-temp-file))
             (list (file-name-all-completions
                    (file-name-nondirectory tex-last-temp-file) dir)))
        (while list
          (delete-file (concat dir (car list)))
          (setq list (cdr list))))))

755
(add-hook 'kill-emacs-hook 'tex-delete-last-temp-files)
root's avatar
root committed
756

757
;;; The commands:
root's avatar
root committed
758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777

(defun tex-region (beg end)
  "Run TeX on the current region, via a temporary file.
The file's name comes from the variable `tex-zap-file' and the
variable `tex-directory' says where to put it.

If the buffer has a header, the header is given to TeX before the
region itself.  The buffer's header is all lines between the strings
defined by `tex-start-of-header' and `tex-end-of-header' inclusive.
The header must start in the first 100 lines of the buffer.

The value of `tex-trailer' is given to TeX as input after the region.

The value of `tex-command' specifies the command to use to run TeX."
  (interactive "r")
  (if (tex-shell-running)
      (tex-kill-job)
    (tex-start-shell))
  (or tex-zap-file
      (setq tex-zap-file (tex-generate-zap-file-name)))
778 779 780 781 782 783 784 785 786 787
  (let* ((temp-buffer (get-buffer-create " TeX-Output-Buffer"))
         ; Temp file will be written and TeX will be run in zap-directory.
         ; If the TEXINPUTS file has relative directories or if the region has
         ; \input of files, this must be the same directory as the file for
         ; TeX to access the correct inputs.  That's why it's safest if
         ; tex-directory is ".".
         (zap-directory
          (file-name-as-directory (expand-file-name tex-directory)))
         (tex-out-file (concat zap-directory tex-zap-file)))
    (tex-delete-last-temp-files)
root's avatar
root committed
788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
    ;; Write the new temp file.
    (save-excursion
      (save-restriction
	(widen)
	(goto-char (point-min))
	(forward-line 100)
	(let ((search-end (point))
	      (hbeg (point-min)) (hend (point-min))
	      (default-directory zap-directory))
	  (goto-char (point-min))
	  ;; Initialize the temp file with either the header or nothing
	  (if (search-forward tex-start-of-header search-end t)
	      (progn
		(beginning-of-line)
		(setq hbeg (point))	;mark beginning of header
		(if (search-forward tex-end-of-header nil t)
		    (progn (forward-line 1)
			   (setq hend (point)))	;mark end of header
		  (setq hbeg (point-min))))) ;no header
807 808 809
	  (write-region (min hbeg beg) hend
                        (concat tex-out-file ".tex") nil nil)
	  (write-region (max beg hend) end (concat tex-out-file ".tex") t nil))
root's avatar
root committed
810 811 812 813 814 815
	(let ((local-tex-trailer tex-trailer))
	  (set-buffer temp-buffer)
	  (erase-buffer)
	  ;; make sure trailer isn't hidden by a comment
	  (insert-string "\n")
	  (if local-tex-trailer (insert-string local-tex-trailer))
816 817 818 819 820 821 822 823 824
	  (tex-set-buffer-directory temp-buffer zap-directory)
	  (write-region (point-min) (point-max)
                        (concat tex-out-file ".tex") t nil))))
    ;; Record the file name to be deleted afterward.
    (setq tex-last-temp-file tex-out-file)
    (tex-send-command tex-shell-cd-command zap-directory)
    (tex-send-command tex-command tex-out-file)
    (setq tex-print-file tex-out-file)
    (setq tex-last-buffer-texed (current-buffer))))
root's avatar
root committed
825 826 827

(defun tex-buffer ()
  "Run TeX on current buffer.  See \\[tex-region] for more information.
828 829
Does not save the buffer, so it's useful for trying experimental versions.
See \\[tex-file] for an alternative."
root's avatar
root committed
830 831 832 833 834 835 836 837 838 839 840 841 842
  (interactive)
  (tex-region (point-min) (point-max)))

(defun tex-file ()
  "Prompt to save all buffers and run TeX (or LaTeX) on current buffer's file.
This function is more useful than \\[tex-buffer] when you need the
`.aux' file of LaTeX to have the correct name."
  (interactive)
  (let ((tex-out-file
         (if (buffer-file-name)
             (file-name-nondirectory (buffer-file-name))
           (error "Buffer does not seem to be associated with any file")))
	(file-dir (file-name-directory (buffer-file-name))))
Jim Blandy's avatar
Jim Blandy committed
843
    (if tex-offer-save
844
        (save-some-buffers))
root's avatar
root committed
845 846 847
    (if (tex-shell-running)
        (tex-kill-job)
      (tex-start-shell))
848 849
    (tex-send-command tex-shell-cd-command file-dir)
    (tex-send-command tex-command tex-out-file))
root's avatar
root committed
850
  (setq tex-last-buffer-texed (current-buffer))
851
  (setq tex-print-file (buffer-file-name)))
root's avatar
root committed
852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884

(defun tex-generate-zap-file-name ()
  "Generate a unique name suitable for use as a file name."
  ;; Include the shell process number and host name
  ;; in case there are multiple shells (for same or different user).
  (format "#tz%d%s"
          (process-id (get-buffer-process "*tex-shell*"))
	  (tex-strip-dots (system-name))))

(defun tex-strip-dots (s)
  (setq s (copy-sequence s))
  (while (string-match "\\." s)
    (aset s (match-beginning 0) ?-))
  s)

;; This will perhaps be useful for modifying TEXINPUTS.
;; Expand each file name, separated by colons, in the string S.
(defun tex-expand-files (s)
  (let (elts (start 0))
    (while (string-match ":" s start)
      (setq elts (cons (substring s start (match-beginning 0)) elts))
      (setq start (match-end 0)))
    (or (= start 0)
	(setq elts (cons (substring s start) elts)))
    (mapconcat 'expand-file-name (nreverse elts) ":")))

(defun tex-shell-running ()
  (and (get-process "tex-shell")
       (eq (process-status (get-process "tex-shell")) 'run)))

(defun tex-kill-job ()
  "Kill the currently running TeX job."
  (interactive)
885
  (quit-process (get-process "tex-shell") t))
root's avatar
root committed
886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901

(defun tex-recenter-output-buffer (linenum)
  "Redisplay buffer of TeX job output so that most recent output can be seen.
The last line of the buffer is displayed on
line LINE of the window, or centered if LINE is nil."
  (interactive "P")
  (let ((tex-shell (get-buffer "*tex-shell*"))
	(old-buffer (current-buffer)))
    (if (null tex-shell)
	(message "No TeX output buffer")
      (pop-to-buffer tex-shell)
      (bury-buffer tex-shell)
      (goto-char (point-max))
      (recenter (if linenum
		    (prefix-numeric-value linenum)
		  (/ (window-height) 2)))
902
      (pop-to-buffer old-buffer))))
root's avatar
root committed
903

904
(defun tex-print (&optional alt)
root's avatar
root committed
905
  "Print the .dvi file made by \\[tex-region], \\[tex-buffer] or \\[tex-file].
Christopher Zaborsky's avatar
Christopher Zaborsky committed
906 907
Runs the shell command defined by `tex-dvi-print-command'.  If prefix argument
is provided, use the alternative command, `tex-alt-dvi-print-command'."
908
  (interactive "P")
root's avatar
root committed
909 910 911 912 913
  (let ((print-file-name-dvi (tex-append tex-print-file ".dvi"))
	test-name)
    (if (and (not (equal (current-buffer) tex-last-buffer-texed))
	     (file-newer-than-file-p
	      (setq test-name (tex-append (buffer-file-name) ".dvi"))
914
	      print-file-name-dvi))
root's avatar
root committed
915
	(setq print-file-name-dvi test-name))
916 917 918 919 920
    (if (not (file-exists-p print-file-name-dvi))
        (error "No appropriate `.dvi' file could be found")
      (tex-send-command
        (if alt tex-alt-dvi-print-command tex-dvi-print-command)
        print-file-name-dvi t))))
root's avatar
root committed
921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944

(defun tex-view ()
  "Preview the last `.dvi' file made by running TeX under Emacs.
This means, made using \\[tex-region], \\[tex-buffer] or \\[tex-file].
The variable `tex-dvi-view-command' specifies the shell command for preview."
  (interactive)
  (let ((tex-dvi-print-command tex-dvi-view-command))
    (tex-print)))

(defun tex-append (file-name suffix)
  "Append to FILENAME the suffix SUFFIX, using same algorithm TeX uses.
Scans for the first (not last) period.
No period is retained immediately before SUFFIX,
so normally SUFFIX starts with one."
  (if (stringp file-name)
      (let ((file (file-name-nondirectory file-name)))
	(concat (file-name-directory file-name)
		(substring file 0
			   (string-match "\\." file))
		suffix))
    " "))

(defun tex-show-print-queue ()
  "Show the print queue that \\[tex-print] put your job on.
Christopher Zaborsky's avatar
Christopher Zaborsky committed
945
Runs the shell command defined by `tex-show-queue-command'."
root's avatar
root committed
946 947 948 949
  (interactive)
  (if (tex-shell-running)
      (tex-kill-job)
    (tex-start-shell))
950
  (tex-send-command tex-show-queue-command))
root's avatar
root committed
951 952 953 954 955 956 957 958 959 960

(defun tex-bibtex-file ()
  "Run BibTeX on the current buffer's file."
  (interactive)
  (if (tex-shell-running)
      (tex-kill-job)
    (tex-start-shell))
  (let ((tex-out-file
         (tex-append (file-name-nondirectory (buffer-file-name)) ""))
	(file-dir (file-name-directory (buffer-file-name))))
961 962 963 964
    (tex-send-command tex-shell-cd-command file-dir)
    (tex-send-command bibtex-command tex-out-file)))

(run-hooks 'tex-mode-load-hook)
root's avatar
root committed
965

Jim Blandy's avatar
Jim Blandy committed
966 967
(provide 'tex-mode)

Eric S. Raymond's avatar
Eric S. Raymond committed
968
;;; tex-mode.el ends here
969