]> code.delx.au - gnu-emacs/blob - lisp/progmodes/fortran.el
(calculate-fortran-indent): Fixup regexp for where statements.
[gnu-emacs] / lisp / progmodes / fortran.el
1 ;;; fortran.el --- Fortran mode for GNU Emacs
2
3 ;;; Copyright (c) 1986, 1993 Free Software Foundation, Inc.
4
5 ;; Author: Michael D. Prange <prange@erl.mit.edu>
6 ;; Maintainer: bug-fortran-mode@erl.mit.edu
7 ;; Version 1.30.3 (November 16, 1993)
8 ;; Keywords: languages
9
10 ;; This file is part of GNU Emacs.
11
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; any later version.
16
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
21
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to
24 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
25
26 ;;; Commentary:
27
28 ;; Fortran mode has been upgraded and is now maintained by Stephen A. Wood
29 ;; (saw@cebaf.gov). It now will use either fixed format continuation line
30 ;; markers (character in 6th column), or tab format continuation line style
31 ;; (digit after a TAB character.) A auto-fill mode has been added to
32 ;; automatically wrap fortran lines that get too long.
33
34 ;; We acknowledge many contributions and valuable suggestions by
35 ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
36 ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
37 ;; Gary Sabot and Richard Stallman.
38
39 ;;; This file may be used with GNU Emacs version 18.xx if the following
40 ;;; variable and function substitutions are made.
41 ;;; Replace:
42 ;;; frame-width with screen-width
43 ;;; auto-fill-function with auto-fill-hook
44 ;;; comment-indent-function with comment-indent-hook
45 ;;; (setq unread-command-events (list c)) with (setq unread-command-char c)
46
47 ;;; Bugs to bug-fortran-mode@erl.mit.edu
48
49 (defconst fortran-mode-version "version 1.30.3")
50
51 ;;; Code:
52
53 ;;;###autoload
54 (defvar fortran-tab-mode-default nil
55 "*Default tabbing/carriage control style for empty files in Fortran mode.
56 A value of t specifies tab-digit style of continuation control.
57 A value of nil specifies that continuation lines are marked
58 with a character in column 6.")
59
60 ;; Buffer local, used to display mode line.
61 (defvar fortran-tab-mode-string nil
62 "String to appear in mode line when TAB-format mode is on.")
63
64 (defvar fortran-do-indent 3
65 "*Extra indentation applied to DO blocks.")
66
67 (defvar fortran-if-indent 3
68 "*Extra indentation applied to IF blocks.")
69
70 (defvar fortran-structure-indent 3
71 "*Extra indentation applied to STRUCTURE, UNION and MAP blocks.")
72
73 (defvar fortran-continuation-indent 5
74 "*Extra indentation applied to Fortran continuation lines.")
75
76 (defvar fortran-comment-indent-style 'fixed
77 "*nil forces comment lines not to be touched,
78 'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
79 columns beyond `fortran-minimum-statement-indent-fixed' (for
80 `indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
81 `indent-tabs-mode' of t), and 'relative indents to current
82 Fortran indentation plus `fortran-comment-line-extra-indent'.")
83
84 (defvar fortran-comment-line-extra-indent 0
85 "*Amount of extra indentation for text within full-line comments.")
86
87 (defvar comment-line-start nil
88 "*Delimiter inserted to start new full-line comment.")
89
90 (defvar comment-line-start-skip nil
91 "*Regexp to match the start of a full-line comment.")
92
93 (defvar fortran-minimum-statement-indent-fixed 6
94 "*Minimum statement indentation for fixed format continuation style.")
95
96 (defvar fortran-minimum-statement-indent-tab (max tab-width 6)
97 "*Minimum statement indentation for TAB format continuation style.")
98
99 ;; Note that this is documented in the v18 manuals as being a string
100 ;; of length one rather than a single character.
101 ;; The code in this file accepts either format for compatibility.
102 (defvar fortran-comment-indent-char " "
103 "*Single-character string inserted for Fortran comment indentation.
104 Normally a space.")
105
106 (defvar fortran-line-number-indent 1
107 "*Maximum indentation for Fortran line numbers.
108 5 means right-justify them within their five-column field.")
109
110 (defvar fortran-check-all-num-for-matching-do nil
111 "*Non-nil causes all numbered lines to be treated as possible DO loop ends.")
112
113 (defvar fortran-blink-matching-if nil
114 "*From a Fortran ENDIF statement, blink the matching IF statement.")
115
116 (defvar fortran-continuation-string "$"
117 "*Single-character string used for Fortran continuation lines.
118 In fixed format continuation style, this character is inserted in
119 column 6 by \\[fortran-split-line] to begin a continuation line.
120 Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
121 convert the line into a continuation line of the appropriate style.
122 Normally $.")
123
124 (defvar fortran-comment-region "c$$$"
125 "*String inserted by \\[fortran-comment-region]\
126 at start of each line in region.")
127
128 (defvar fortran-electric-line-number t
129 "*Non-nil causes line number digits to be moved to the correct column as\
130 typed.")
131
132 (defvar fortran-startup-message t
133 "*Non-nil displays a startup message when Fortran mode is first called.")
134
135 (defvar fortran-column-ruler-fixed
136 "0 4 6 10 20 30 40 5\
137 0 60 70\n\
138 [ ]|{ | | | | | | | | \
139 | | | | |}\n"
140 "*String displayed above current line by \\[fortran-column-ruler].
141 This variable used in fixed-format mode.")
142
143 (defvar fortran-column-ruler-tab
144 "0 810 20 30 40 5\
145 0 60 70\n\
146 [ ]| { | | | | | | | | \
147 | | | | |}\n"
148 "*String displayed above current line by \\[fortran-column-ruler].
149 This variable used in TAB-format mode.")
150
151 (defconst bug-fortran-mode "bug-fortran-mode@erl.mit.edu"
152 "Address of mailing list for Fortran mode bugs.")
153
154 (defvar fortran-mode-syntax-table nil
155 "Syntax table in use in Fortran mode buffers.")
156
157 (defvar fortran-analyze-depth 100
158 "Number of lines to scan to determine whether to use fixed or TAB format\
159 style.")
160
161 (defvar fortran-break-before-delimiters t
162 "*Non-nil causes `fortran-do-auto-fill' to break lines before delimiters.")
163
164 (if fortran-mode-syntax-table
165 ()
166 (setq fortran-mode-syntax-table (make-syntax-table))
167 (modify-syntax-entry ?\; "w" fortran-mode-syntax-table)
168 (modify-syntax-entry ?\r " " fortran-mode-syntax-table)
169 (modify-syntax-entry ?+ "." fortran-mode-syntax-table)
170 (modify-syntax-entry ?- "." fortran-mode-syntax-table)
171 (modify-syntax-entry ?= "." fortran-mode-syntax-table)
172 (modify-syntax-entry ?* "." fortran-mode-syntax-table)
173 (modify-syntax-entry ?/ "." fortran-mode-syntax-table)
174 (modify-syntax-entry ?\' "\"" fortran-mode-syntax-table)
175 (modify-syntax-entry ?\" "\"" fortran-mode-syntax-table)
176 (modify-syntax-entry ?\\ "/" fortran-mode-syntax-table)
177 (modify-syntax-entry ?. "w" fortran-mode-syntax-table)
178 (modify-syntax-entry ?_ "w" fortran-mode-syntax-table)
179 (modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
180
181 (defvar fortran-mode-map ()
182 "Keymap used in Fortran mode.")
183 (if fortran-mode-map
184 ()
185 (setq fortran-mode-map (make-sparse-keymap))
186 (define-key fortran-mode-map ";" 'fortran-abbrev-start)
187 (define-key fortran-mode-map "\C-c;" 'fortran-comment-region)
188 (define-key fortran-mode-map "\e\C-a" 'beginning-of-fortran-subprogram)
189 (define-key fortran-mode-map "\e\C-e" 'end-of-fortran-subprogram)
190 (define-key fortran-mode-map "\e;" 'fortran-indent-comment)
191 (define-key fortran-mode-map "\e\C-h" 'mark-fortran-subprogram)
192 (define-key fortran-mode-map "\e\n" 'fortran-split-line)
193 (define-key fortran-mode-map "\n" 'fortran-indent-new-line)
194 (define-key fortran-mode-map "\e\C-q" 'fortran-indent-subprogram)
195 (define-key fortran-mode-map "\C-c\C-w" 'fortran-window-create-momentarily)
196 (define-key fortran-mode-map "\C-c\C-r" 'fortran-column-ruler)
197 (define-key fortran-mode-map "\C-c\C-p" 'fortran-previous-statement)
198 (define-key fortran-mode-map "\C-c\C-n" 'fortran-next-statement)
199 (define-key fortran-mode-map "\t" 'fortran-indent-line)
200 (define-key fortran-mode-map "0" 'fortran-electric-line-number)
201 (define-key fortran-mode-map "1" 'fortran-electric-line-number)
202 (define-key fortran-mode-map "2" 'fortran-electric-line-number)
203 (define-key fortran-mode-map "3" 'fortran-electric-line-number)
204 (define-key fortran-mode-map "4" 'fortran-electric-line-number)
205 (define-key fortran-mode-map "5" 'fortran-electric-line-number)
206 (define-key fortran-mode-map "6" 'fortran-electric-line-number)
207 (define-key fortran-mode-map "7" 'fortran-electric-line-number)
208 (define-key fortran-mode-map "8" 'fortran-electric-line-number)
209 (define-key fortran-mode-map "9" 'fortran-electric-line-number))
210 \f
211 (defvar fortran-mode-abbrev-table nil)
212 (if fortran-mode-abbrev-table
213 ()
214 (let ((ac abbrevs-changed))
215 (define-abbrev-table 'fortran-mode-abbrev-table ())
216 (define-abbrev fortran-mode-abbrev-table ";au" "automatic" nil)
217 (define-abbrev fortran-mode-abbrev-table ";b" "byte" nil)
218 (define-abbrev fortran-mode-abbrev-table ";bd" "block data" nil)
219 (define-abbrev fortran-mode-abbrev-table ";ch" "character" nil)
220 (define-abbrev fortran-mode-abbrev-table ";cl" "close" nil)
221 (define-abbrev fortran-mode-abbrev-table ";c" "continue" nil)
222 (define-abbrev fortran-mode-abbrev-table ";cm" "common" nil)
223 (define-abbrev fortran-mode-abbrev-table ";cx" "complex" nil)
224 (define-abbrev fortran-mode-abbrev-table ";df" "define" nil)
225 (define-abbrev fortran-mode-abbrev-table ";di" "dimension" nil)
226 (define-abbrev fortran-mode-abbrev-table ";do" "double" nil)
227 (define-abbrev fortran-mode-abbrev-table ";dc" "double complex" nil)
228 (define-abbrev fortran-mode-abbrev-table ";dp" "double precision" nil)
229 (define-abbrev fortran-mode-abbrev-table ";dw" "do while" nil)
230 (define-abbrev fortran-mode-abbrev-table ";e" "else" nil)
231 (define-abbrev fortran-mode-abbrev-table ";ed" "enddo" nil)
232 (define-abbrev fortran-mode-abbrev-table ";el" "elseif" nil)
233 (define-abbrev fortran-mode-abbrev-table ";en" "endif" nil)
234 (define-abbrev fortran-mode-abbrev-table ";eq" "equivalence" nil)
235 (define-abbrev fortran-mode-abbrev-table ";ew" "endwhere" nil)
236 (define-abbrev fortran-mode-abbrev-table ";ex" "external" nil)
237 (define-abbrev fortran-mode-abbrev-table ";ey" "entry" nil)
238 (define-abbrev fortran-mode-abbrev-table ";f" "format" nil)
239 (define-abbrev fortran-mode-abbrev-table ";fa" ".false." nil)
240 (define-abbrev fortran-mode-abbrev-table ";fu" "function" nil)
241 (define-abbrev fortran-mode-abbrev-table ";g" "goto" nil)
242 (define-abbrev fortran-mode-abbrev-table ";im" "implicit" nil)
243 (define-abbrev fortran-mode-abbrev-table ";ib" "implicit byte" nil)
244 (define-abbrev fortran-mode-abbrev-table ";ic" "implicit complex" nil)
245 (define-abbrev fortran-mode-abbrev-table ";ich" "implicit character" nil)
246 (define-abbrev fortran-mode-abbrev-table ";ii" "implicit integer" nil)
247 (define-abbrev fortran-mode-abbrev-table ";il" "implicit logical" nil)
248 (define-abbrev fortran-mode-abbrev-table ";ir" "implicit real" nil)
249 (define-abbrev fortran-mode-abbrev-table ";inc" "include" nil)
250 (define-abbrev fortran-mode-abbrev-table ";in" "integer" nil)
251 (define-abbrev fortran-mode-abbrev-table ";intr" "intrinsic" nil)
252 (define-abbrev fortran-mode-abbrev-table ";l" "logical" nil)
253 (define-abbrev fortran-mode-abbrev-table ";n" "namelist" nil)
254 (define-abbrev fortran-mode-abbrev-table ";o" "open" nil) ; was ;op
255 (define-abbrev fortran-mode-abbrev-table ";pa" "parameter" nil)
256 (define-abbrev fortran-mode-abbrev-table ";pr" "program" nil)
257 (define-abbrev fortran-mode-abbrev-table ";ps" "pause" nil)
258 (define-abbrev fortran-mode-abbrev-table ";p" "print" nil)
259 (define-abbrev fortran-mode-abbrev-table ";rc" "record" nil)
260 (define-abbrev fortran-mode-abbrev-table ";re" "real" nil)
261 (define-abbrev fortran-mode-abbrev-table ";r" "read" nil)
262 (define-abbrev fortran-mode-abbrev-table ";rt" "return" nil)
263 (define-abbrev fortran-mode-abbrev-table ";rw" "rewind" nil)
264 (define-abbrev fortran-mode-abbrev-table ";s" "stop" nil)
265 (define-abbrev fortran-mode-abbrev-table ";sa" "save" nil)
266 (define-abbrev fortran-mode-abbrev-table ";st" "structure" nil)
267 (define-abbrev fortran-mode-abbrev-table ";sc" "static" nil)
268 (define-abbrev fortran-mode-abbrev-table ";su" "subroutine" nil)
269 (define-abbrev fortran-mode-abbrev-table ";tr" ".true." nil)
270 (define-abbrev fortran-mode-abbrev-table ";ty" "type" nil)
271 (define-abbrev fortran-mode-abbrev-table ";vo" "volatile" nil)
272 (define-abbrev fortran-mode-abbrev-table ";w" "write" nil)
273 (define-abbrev fortran-mode-abbrev-table ";wh" "where" nil)
274 (setq abbrevs-changed ac)))
275 \f
276 ;;;###autoload
277 (defun fortran-mode ()
278 "Major mode for editing Fortran code.
279 \\[fortran-indent-line] indents the current Fortran line correctly.
280 DO statements must not share a common CONTINUE.
281
282 Type ;? or ;\\[help-command] to display a list of built-in\
283 abbrevs for Fortran keywords.
284
285 Key definitions:
286 \\{fortran-mode-map}
287
288 Variables controlling indentation style and extra features:
289
290 comment-start
291 Normally nil in Fortran mode. If you want to use comments
292 starting with `!', set this to the string \"!\".
293 fortran-do-indent
294 Extra indentation within do blocks. (default 3)
295 fortran-if-indent
296 Extra indentation within if blocks. (default 3)
297 fortran-structure-indent
298 Extra indentation within structure, union and map blocks. (default 3)
299 fortran-continuation-indent
300 Extra indentation applied to continuation statements. (default 5)
301 fortran-comment-line-extra-indent
302 Amount of extra indentation for text within full-line comments. (default 0)
303 fortran-comment-indent-style
304 nil means don't change indentation of text in full-line comments,
305 fixed means indent that text at `fortran-comment-line-extra-indent' beyond
306 the value of `fortran-minimum-statement-indent-fixed' (for fixed
307 format continuation style) or `fortran-minimum-statement-indent-tab'
308 (for TAB format continuation style).
309 relative means indent at `fortran-comment-line-extra-indent' beyond the
310 indentation for a line of code.
311 (default 'fixed)
312 fortran-comment-indent-char
313 Single-character string to be inserted instead of space for
314 full-line comment indentation. (default \" \")
315 fortran-minimum-statement-indent-fixed
316 Minimum indentation for Fortran statements in fixed format mode. (def.6)
317 fortran-minimum-statement-indent-tab
318 Minimum indentation for Fortran statements in TAB format mode. (default 9)
319 fortran-line-number-indent
320 Maximum indentation for line numbers. A line number will get
321 less than this much indentation if necessary to avoid reaching
322 column 5. (default 1)
323 fortran-check-all-num-for-matching-do
324 Non-nil causes all numbered lines to be treated as possible \"continue\"
325 statements. (default nil)
326 fortran-blink-matching-if
327 From a Fortran ENDIF statement, blink the matching IF statement.
328 (default nil)
329 fortran-continuation-string
330 Single-character string to be inserted in column 5 of a continuation
331 line. (default \"$\")
332 fortran-comment-region
333 String inserted by \\[fortran-comment-region] at start of each line in
334 region. (default \"c$$$\")
335 fortran-electric-line-number
336 Non-nil causes line number digits to be moved to the correct column
337 as typed. (default t)
338 fortran-break-before-delimiters
339 Non-nil causes `fortran-do-auto-fill' breaks lines before delimiters.
340 (default t)
341 fortran-startup-message
342 Set to nil to inhibit message first time Fortran mode is used.
343
344 Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
345 with no args, if that value is non-nil."
346 (interactive)
347 (kill-all-local-variables)
348 (if fortran-startup-message
349 (message "Emacs Fortran mode %s. Bugs to %s"
350 fortran-mode-version bug-fortran-mode))
351 (setq fortran-startup-message nil)
352 (setq local-abbrev-table fortran-mode-abbrev-table)
353 (set-syntax-table fortran-mode-syntax-table)
354 (make-local-variable 'fortran-break-before-delimiters)
355 (setq fortran-break-before-delimiters t)
356 (make-local-variable 'indent-line-function)
357 (setq indent-line-function 'fortran-indent-line)
358 (make-local-variable 'comment-indent-function)
359 (setq comment-indent-function 'fortran-comment-hook)
360 (make-local-variable 'comment-line-start-skip)
361 (setq comment-line-start-skip
362 "^[Cc*]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*\\|^#.*")
363 (make-local-variable 'comment-line-start)
364 (setq comment-line-start "c")
365 (make-local-variable 'comment-start-skip)
366 (setq comment-start-skip "![ \t]*")
367 (make-local-variable 'comment-start)
368 (setq comment-start nil)
369 (make-local-variable 'require-final-newline)
370 (setq require-final-newline t)
371 (make-local-variable 'abbrev-all-caps)
372 (setq abbrev-all-caps t)
373 (make-local-variable 'indent-tabs-mode)
374 (setq indent-tabs-mode nil)
375 ;;;(setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
376 (setq fill-column 72) ; Already local?
377 (use-local-map fortran-mode-map)
378 (setq mode-name "Fortran")
379 (setq major-mode 'fortran-mode)
380 ;;;(make-local-variable 'fortran-tab-mode)
381 (make-local-variable 'fortran-comment-line-extra-indent)
382 (make-local-variable 'fortran-minimum-statement-indent-fixed)
383 (make-local-variable 'fortran-minimum-statement-indent-tab)
384 (make-local-variable 'fortran-column-ruler-fixed)
385 (make-local-variable 'fortran-column-ruler-tab)
386 (make-local-variable 'fortran-tab-mode-string)
387 (setq fortran-tab-mode-string " TAB-format")
388 (setq indent-tabs-mode (fortran-analyze-file-format))
389 (run-hooks 'fortran-mode-hook))
390 \f
391 (defun fortran-comment-hook ()
392 (save-excursion
393 (skip-chars-backward " \t")
394 (max (+ 1 (current-column))
395 comment-column)))
396
397 (defun fortran-indent-comment ()
398 "Align or create comment on current line.
399 Existing comments of all types are recognized and aligned.
400 If the line has no comment, a side-by-side comment is inserted and aligned
401 if the value of comment-start is not nil.
402 Otherwise, a separate-line comment is inserted, on this line
403 or on a new line inserted before this line if this line is not blank."
404 (interactive)
405 (beginning-of-line)
406 ;; Recognize existing comments of either kind.
407 (cond ((looking-at comment-line-start-skip)
408 (fortran-indent-line))
409 ((fortran-find-comment-start-skip) ; catches any inline comment and
410 ; leaves point after comment-start-skip
411 (if comment-start-skip
412 (progn (goto-char (match-beginning 0))
413 (if (not (= (current-column) (fortran-comment-hook)))
414 (progn (delete-horizontal-space)
415 (indent-to (fortran-comment-hook)))))
416 (end-of-line))) ; otherwise goto end of line or sth else?
417 ;; No existing comment.
418 ;; If side-by-side comments are defined, insert one,
419 ;; unless line is now blank.
420 ((and comment-start (not (looking-at "^[ \t]*$")))
421 (end-of-line)
422 (delete-horizontal-space)
423 (indent-to (fortran-comment-hook))
424 (insert comment-start))
425 ;; Else insert separate-line comment, making a new line if nec.
426 (t
427 (if (looking-at "^[ \t]*$")
428 (delete-horizontal-space)
429 (beginning-of-line)
430 (insert "\n")
431 (forward-char -1))
432 (insert comment-line-start)
433 (insert-char (if (stringp fortran-comment-indent-char)
434 (aref fortran-comment-indent-char 0)
435 fortran-comment-indent-char)
436 (- (calculate-fortran-indent) (current-column))))))
437
438 (defun fortran-comment-region (beg-region end-region arg)
439 "Comments every line in the region.
440 Puts fortran-comment-region at the beginning of every line in the region.
441 BEG-REGION and END-REGION are args which specify the region boundaries.
442 With non-nil ARG, uncomments the region."
443 (interactive "*r\nP")
444 (let ((end-region-mark (make-marker)) (save-point (point-marker)))
445 (set-marker end-region-mark end-region)
446 (goto-char beg-region)
447 (beginning-of-line)
448 (if (not arg) ;comment the region
449 (progn (insert fortran-comment-region)
450 (while (and (= (forward-line 1) 0)
451 (< (point) end-region-mark))
452 (insert fortran-comment-region)))
453 (let ((com (regexp-quote fortran-comment-region))) ;uncomment the region
454 (if (looking-at com)
455 (delete-region (point) (match-end 0)))
456 (while (and (= (forward-line 1) 0)
457 (< (point) end-region-mark))
458 (if (looking-at com)
459 (delete-region (point) (match-end 0))))))
460 (goto-char save-point)
461 (set-marker end-region-mark nil)
462 (set-marker save-point nil)))
463 \f
464 (defun fortran-abbrev-start ()
465 "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
466 Any other key combination is executed normally."
467 (interactive)
468 (let (c)
469 (insert last-command-char)
470 (if (or (eq (setq c (read-event)) ??) ;insert char if not equal to `?'
471 (eq c help-char))
472 (fortran-abbrev-help)
473 (setq unread-command-events (list c)))))
474
475 (defun fortran-abbrev-help ()
476 "List the currently defined abbrevs in Fortran mode."
477 (interactive)
478 (message "Listing abbrev table...")
479 (display-buffer (fortran-prepare-abbrev-list-buffer))
480 (message "Listing abbrev table...done"))
481
482 (defun fortran-prepare-abbrev-list-buffer ()
483 (save-excursion
484 (set-buffer (get-buffer-create "*Abbrevs*"))
485 (erase-buffer)
486 (insert-abbrev-table-description 'fortran-mode-abbrev-table t)
487 (goto-char (point-min))
488 (set-buffer-modified-p nil)
489 (edit-abbrevs-mode))
490 (get-buffer-create "*Abbrevs*"))
491
492 (defun fortran-column-ruler ()
493 "Inserts a column ruler momentarily above current line, till next keystroke.
494 The ruler is defined by the value of `fortran-column-ruler'.
495 The key typed is executed unless it is SPC."
496 (interactive)
497 (momentary-string-display
498 (if indent-tabs-mode
499 fortran-column-ruler-tab
500 fortran-column-ruler-fixed)
501 (save-excursion
502 (beginning-of-line)
503 (if (eq (window-start (selected-window))
504 (window-point (selected-window)))
505 (progn (forward-line) (point))
506 (point)))
507 nil "Type SPC or any command to erase ruler."))
508
509 (defun fortran-window-create ()
510 "Makes the window 72 columns wide.
511 See also `fortran-window-create-momentarily'."
512 (interactive)
513 (condition-case error
514 (progn
515 (let ((window-min-width 2))
516 (if (< (window-width) (frame-width))
517 (enlarge-window-horizontally (- (frame-width)
518 (window-width) 1)))
519 (split-window-horizontally 73)
520 (other-window 1)
521 (switch-to-buffer " fortran-window-extra" t)
522 (select-window (previous-window))))
523 (error (message "No room for Fortran window.")
524 'error)))
525
526 (defun fortran-window-create-momentarily (&optional arg)
527 "Momentarily makes the window 72 columns wide.
528 Optional ARG non-nil and non-unity disables the momentary feature.
529 See also `fortran-window-create'."
530 (interactive "p")
531 (if (or (not arg)
532 (= arg 1))
533 (save-window-excursion
534 (if (not (equal (fortran-window-create) 'error))
535 (progn (message "Type SPC to continue editing.")
536 (let ((char (read-event)))
537 (or (equal char (string-to-char " "))
538 (setq unread-command-events (list char)))))))
539 (fortran-window-create)))
540
541 (defun fortran-split-line ()
542 "Break line at point and insert continuation marker and alignment."
543 (interactive)
544 (delete-horizontal-space)
545 (if (save-excursion (beginning-of-line) (looking-at comment-line-start-skip))
546 (insert "\n" comment-line-start " ")
547 (if indent-tabs-mode
548 (progn
549 (insert "\n\t")
550 (insert-char (fortran-numerical-continuation-char) 1))
551 (insert "\n " fortran-continuation-string)));Space after \n important
552 (fortran-indent-line)) ;when the cont string is C, c or *.
553
554 (defun fortran-numerical-continuation-char ()
555 "Return a digit for tab-digit style of continuation lines.
556 If, previous line is a tab-digit continuation line, returns that digit
557 plus one. Otherwise return 1. Zero not allowed."
558 (save-excursion
559 (forward-line -1)
560 (if (looking-at "\t[1-9]")
561 (+ ?1 (% (- (char-after (+ (point) 1)) ?0) 9))
562 ?1)))
563
564 (defun delete-horizontal-regexp (chars)
565 "Delete all characters in CHARS around point.
566 CHARS is like the inside of a [...] in a regular expression
567 except that ] is never special and \ quotes ^, - or \."
568 (interactive "*s")
569 (skip-chars-backward chars)
570 (delete-region (point) (progn (skip-chars-forward chars) (point))))
571
572 (defun fortran-electric-line-number (arg)
573 "Self insert, but if part of a Fortran line number indent it automatically.
574 Auto-indent does not happen if a numeric arg is used."
575 (interactive "P")
576 (if (or arg (not fortran-electric-line-number))
577 (if arg
578 (self-insert-command (prefix-numeric-value arg))
579 (self-insert-command 1))
580 (if (or (and (= 5 (current-column))
581 (save-excursion
582 (beginning-of-line)
583 (looking-at " ")));In col 5 with only spaces to left.
584 (and (= (if indent-tabs-mode
585 fortran-minimum-statement-indent-tab
586 fortran-minimum-statement-indent-fixed) (current-column))
587 (save-excursion
588 (beginning-of-line)
589 (looking-at "\t"));In col 8 with a single tab to the left.
590 (not (or (eq last-command 'fortran-indent-line)
591 (eq last-command
592 'fortran-indent-new-line))))
593 (save-excursion
594 (re-search-backward "[^ \t0-9]"
595 (save-excursion
596 (beginning-of-line)
597 (point))
598 t)) ;not a line number
599 (looking-at "[0-9]") ;within a line number
600 )
601 (self-insert-command (prefix-numeric-value arg))
602 (skip-chars-backward " \t")
603 (insert last-command-char)
604 (fortran-indent-line))))
605 \f
606 (defun beginning-of-fortran-subprogram ()
607 "Moves point to the beginning of the current Fortran subprogram."
608 (interactive)
609 (let ((case-fold-search t))
610 (beginning-of-line -1)
611 (re-search-backward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
612 (if (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")
613 (forward-line 1))))
614
615 (defun end-of-fortran-subprogram ()
616 "Moves point to the end of the current Fortran subprogram."
617 (interactive)
618 (let ((case-fold-search t))
619 (beginning-of-line 2)
620 (re-search-forward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
621 (goto-char (match-beginning 0))
622 (forward-line 1)))
623
624 (defun mark-fortran-subprogram ()
625 "Put mark at end of Fortran subprogram, point at beginning.
626 The marks are pushed."
627 (interactive)
628 (end-of-fortran-subprogram)
629 (push-mark (point))
630 (beginning-of-fortran-subprogram))
631
632 (defun fortran-previous-statement ()
633 "Moves point to beginning of the previous Fortran statement.
634 Returns `first-statement' if that statement is the first
635 non-comment Fortran statement in the file, and nil otherwise."
636 (interactive)
637 (let (not-first-statement continue-test)
638 (beginning-of-line)
639 (setq continue-test
640 (and
641 (not (looking-at comment-line-start-skip))
642 (or (looking-at
643 (concat "[ \t]*" (regexp-quote fortran-continuation-string)))
644 (or (looking-at " [^ 0\n]")
645 (looking-at "\t[1-9]")))))
646 (while (and (setq not-first-statement (= (forward-line -1) 0))
647 (or (looking-at comment-line-start-skip)
648 (looking-at "[ \t]*$")
649 (looking-at " [^ 0\n]")
650 (looking-at "\t[1-9]")
651 (looking-at (concat "[ \t]*" comment-start-skip)))))
652 (cond ((and continue-test
653 (not not-first-statement))
654 (message "Incomplete continuation statement."))
655 (continue-test
656 (fortran-previous-statement))
657 ((not not-first-statement)
658 'first-statement))))
659
660 (defun fortran-next-statement ()
661 "Moves point to beginning of the next Fortran statement.
662 Returns `last-statement' if that statement is the last
663 non-comment Fortran statement in the file, and nil otherwise."
664 (interactive)
665 (let (not-last-statement)
666 (beginning-of-line)
667 (while (and (setq not-last-statement
668 (and (= (forward-line 1) 0)
669 (not (eobp))))
670 (or (looking-at comment-line-start-skip)
671 (looking-at "[ \t]*$")
672 (looking-at " [^ 0\n]")
673 (looking-at "\t[1-9]")
674 (looking-at (concat "[ \t]*" comment-start-skip)))))
675 (if (not not-last-statement)
676 'last-statement)))
677 \f
678 (defun fortran-blink-matching-if ()
679 "From a Fortran ENDIF statement, blink the matching IF statement."
680 (let ((count 1) (top-of-window (window-start)) matching-if
681 (endif-point (point)) message)
682 (if (save-excursion (beginning-of-line)
683 (skip-chars-forward " \t0-9")
684 (looking-at "end[ \t]*if\\b"))
685 (progn
686 (save-excursion
687 (while (and (not (= count 0))
688 (not (eq (fortran-previous-statement)
689 'first-statement))
690 (not (looking-at
691 "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
692 ; Keep local to subprogram
693 (skip-chars-forward " \t0-9")
694 (cond ((looking-at "if[ \t]*(")
695 (save-excursion
696 (if (or
697 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
698 (let (then-test);multi-line if-then
699 (while
700 (and (= (forward-line 1) 0)
701 ;search forward for then
702 (or (looking-at " [^ 0\n]")
703 (looking-at "\t[1-9]"))
704 (not
705 (setq
706 then-test
707 (looking-at
708 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
709 then-test))
710 (setq count (- count 1)))))
711 ((looking-at "end[ \t]*if\\b")
712 (setq count (+ count 1)))))
713 (if (not (= count 0))
714 (setq message "No matching if.")
715 (if (< (point) top-of-window)
716 (setq message (concat "Matches " (buffer-substring
717 (progn (beginning-of-line)
718 (point))
719 (progn (end-of-line)
720 (point)))))
721 (setq matching-if (point)))))
722 (if message
723 (message "%s" message)
724 (goto-char matching-if)
725 (sit-for 1)
726 (goto-char endif-point))))))
727 \f
728 (defun fortran-indent-line ()
729 "Indents current Fortran line based on its contents and on previous lines."
730 (interactive)
731 (let ((cfi (calculate-fortran-indent)))
732 (save-excursion
733 (beginning-of-line)
734 (if (or (not (= cfi (fortran-current-line-indentation)))
735 (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t)
736 (not (fortran-line-number-indented-correctly-p))))
737 (fortran-indent-to-column cfi)
738 (beginning-of-line)
739 (if (and (not (looking-at comment-line-start-skip))
740 (fortran-find-comment-start-skip))
741 (fortran-indent-comment))))
742 ;; Never leave point in left margin.
743 (if (< (current-column) cfi)
744 (move-to-column cfi))
745 (if (and auto-fill-function
746 (> (save-excursion (end-of-line) (current-column)) fill-column))
747 (save-excursion
748 (end-of-line)
749 (fortran-do-auto-fill)))
750 (if fortran-blink-matching-if
751 (fortran-blink-matching-if))))
752
753 (defun fortran-indent-new-line ()
754 "Reindent the current Fortran line, insert a newline and indent the newline.
755 An abbrev before point is expanded if `abbrev-mode' is non-nil."
756 (interactive)
757 (if abbrev-mode (expand-abbrev))
758 (save-excursion
759 (beginning-of-line)
760 (skip-chars-forward " \t")
761 (if (or (looking-at "[0-9]") ;Reindent only where it is most
762 (looking-at "end") ;likely to be necessary
763 (looking-at "else")
764 (looking-at (regexp-quote fortran-continuation-string)))
765 (fortran-indent-line)))
766 (newline)
767 (fortran-indent-line))
768
769 (defun fortran-indent-subprogram ()
770 "Properly indents the Fortran subprogram which contains point."
771 (interactive)
772 (save-excursion
773 (mark-fortran-subprogram)
774 (message "Indenting subprogram...")
775 (indent-region (point) (mark) nil))
776 (message "Indenting subprogram...done."))
777
778 (defun calculate-fortran-indent ()
779 "Calculates the Fortran indent column based on previous lines."
780 (let (icol first-statement (case-fold-search t)
781 (fortran-minimum-statement-indent
782 (if indent-tabs-mode
783 fortran-minimum-statement-indent-tab
784 fortran-minimum-statement-indent-fixed)))
785 (save-excursion
786 (setq first-statement (fortran-previous-statement))
787 (if first-statement
788 (setq icol fortran-minimum-statement-indent)
789 (progn
790 (if (= (point) (point-min))
791 (setq icol fortran-minimum-statement-indent)
792 (setq icol (fortran-current-line-indentation)))
793 (skip-chars-forward " \t0-9")
794 (cond ((looking-at "if[ \t]*(")
795 (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
796 (let (then-test) ;multi-line if-then
797 (while (and (= (forward-line 1) 0)
798 ;;search forward for then
799 (or (looking-at " [^ 0\n]")
800 (looking-at "\t[1-9]"))
801 (not (setq then-test (looking-at
802 ".*then\\b[ \t]\
803 *[^ \t_$(=a-z0-9]")))))
804 then-test))
805 (setq icol (+ icol fortran-if-indent))))
806 ((looking-at "\\(else\\|elseif\\)\\b")
807 (setq icol (+ icol fortran-if-indent)))
808 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
809 (setq icol (+ icol fortran-if-indent)))
810 ((looking-at "where[ \t]*(.*)[ \t]*\n")
811 (setq icol (+ icol fortran-if-indent)))
812 ((looking-at "do\\b")
813 (setq icol (+ icol fortran-do-indent)))
814 ((looking-at
815 "\\(structure\\|union\\|map\\)\\b[ \t]*[^ \t=(a-z]")
816 (setq icol (+ icol fortran-structure-indent)))
817 ((looking-at "end\\b[ \t]*[^ \t=(a-z]")
818 ;; Previous END resets indent to minimum
819 (setq icol fortran-minimum-statement-indent))))))
820 (save-excursion
821 (beginning-of-line)
822 (cond ((looking-at "[ \t]*$"))
823 ((looking-at comment-line-start-skip)
824 (cond ((eq fortran-comment-indent-style 'relative)
825 (setq icol (+ icol fortran-comment-line-extra-indent)))
826 ((eq fortran-comment-indent-style 'fixed)
827 (setq icol (+ fortran-minimum-statement-indent
828 fortran-comment-line-extra-indent))))
829 (setq fortran-minimum-statement-indent 0))
830 ((or (looking-at (concat "[ \t]*"
831 (regexp-quote
832 fortran-continuation-string)))
833 (looking-at " [^ 0\n]")
834 (looking-at "\t[1-9]"))
835 (setq icol (+ icol fortran-continuation-indent)))
836 ((looking-at "[ \t]*#") ; Check for cpp directive.
837 (setq fortran-minimum-statement-indent 0 icol 0))
838 (first-statement)
839 ((and fortran-check-all-num-for-matching-do
840 (looking-at "[ \t]*[0-9]+")
841 (fortran-check-for-matching-do))
842 (setq icol (- icol fortran-do-indent)))
843 (t
844 (skip-chars-forward " \t0-9")
845 (cond ((looking-at "end[ \t]*if\\b")
846 (setq icol (- icol fortran-if-indent)))
847 ((looking-at "\\(else\\|elseif\\)\\b")
848 (setq icol (- icol fortran-if-indent)))
849 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
850 (setq icol (- icol fortran-if-indent)))
851 ((looking-at "end[ \t]*where\\b")
852 (setq icol (- icol fortran-if-indent)))
853 ((and (looking-at "continue\\b")
854 (fortran-check-for-matching-do))
855 (setq icol (- icol fortran-do-indent)))
856 ((looking-at "end[ \t]*do\\b")
857 (setq icol (- icol fortran-do-indent)))
858 ((looking-at
859 "end[ \t]*\
860 \\(structure\\|union\\|map\\)\\b[ \t]*[^ \t=(a-z]")
861 (setq icol (- icol fortran-structure-indent)))
862 ((and (looking-at "end\\b[ \t]*[^ \t=(a-z]")
863 (not (= icol fortran-minimum-statement-indent)))
864 (message "Warning: `end' not in column %d. Probably\
865 an unclosed block." fortran-minimum-statement-indent))))))
866 (max fortran-minimum-statement-indent icol)))
867 \f
868 (defun fortran-current-line-indentation ()
869 "Indentation of current line, ignoring Fortran line number or continuation.
870 This is the column position of the first non-whitespace character
871 aside from the line number and/or column 5/8 line-continuation character.
872 For comment lines, returns indentation of the first
873 non-indentation text within the comment."
874 (save-excursion
875 (beginning-of-line)
876 (cond ((looking-at comment-line-start-skip)
877 (goto-char (match-end 0))
878 (skip-chars-forward
879 (if (stringp fortran-comment-indent-char)
880 fortran-comment-indent-char
881 (char-to-string fortran-comment-indent-char))))
882 ((or (looking-at " [^ 0\n]")
883 (looking-at "\t[1-9]"))
884 (goto-char (match-end 0)))
885 (t
886 ;; Move past line number.
887 (skip-chars-forward "[ \t0-9]");From Uli
888 ))
889 ;; Move past whitespace.
890 (skip-chars-forward " \t")
891 (current-column)))
892
893 (defun fortran-indent-to-column (col)
894 "Indents current line with spaces to column COL.
895 notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
896 line, and this continuation character is retained on indentation;
897 2) If `fortran-continuation-string' is the first non-whitespace
898 character, this is a continuation line;
899 3) A non-continuation line which has a number as the first
900 non-whitespace character is a numbered line.
901 4) A TAB followed by a digit indicates a continuation line."
902 (save-excursion
903 (beginning-of-line)
904 (if (looking-at comment-line-start-skip)
905 (if fortran-comment-indent-style
906 (let ((char (if (stringp fortran-comment-indent-char)
907 (aref fortran-comment-indent-char 0)
908 fortran-comment-indent-char)))
909 (goto-char (match-end 0))
910 (delete-horizontal-regexp (concat " \t" (char-to-string char)))
911 (insert-char char (- col (current-column)))))
912 (if (looking-at "\t[1-9]")
913 (if indent-tabs-mode
914 (goto-char (match-end 0))
915 (delete-char 2)
916 (insert " ")
917 (insert fortran-continuation-string))
918 (if (looking-at " [^ 0\n]")
919 (if indent-tabs-mode
920 (progn (delete-char 6)
921 (insert "\t")
922 (insert-char (fortran-numerical-continuation-char) 1))
923 (forward-char 6))
924 (delete-horizontal-space)
925 ;; Put line number in columns 0-4
926 ;; or put continuation character in column 5.
927 (cond ((eobp))
928 ((looking-at (regexp-quote fortran-continuation-string))
929 (if indent-tabs-mode
930 (progn
931 (indent-to
932 (if indent-tabs-mode
933 fortran-minimum-statement-indent-tab
934 fortran-minimum-statement-indent-fixed))
935 (delete-char 1)
936 (insert-char (fortran-numerical-continuation-char) 1))
937 (indent-to 5)
938 (forward-char 1)))
939 ((looking-at "[0-9]+")
940 (let ((extra-space (- 5 (- (match-end 0) (point)))))
941 (if (< extra-space 0)
942 (message "Warning: line number exceeds 5-digit limit.")
943 (indent-to (min fortran-line-number-indent extra-space))))
944 (skip-chars-forward "0-9")))))
945 ;; Point is now after any continuation character or line number.
946 ;; Put body of statement where specified.
947 (delete-horizontal-space)
948 (indent-to col)
949 ;; Indent any comment following code on the same line.
950 (if (and comment-start-skip
951 (fortran-find-comment-start-skip))
952 (progn (goto-char (match-beginning 0))
953 (if (not (= (current-column) (fortran-comment-hook)))
954 (progn (delete-horizontal-space)
955 (indent-to (fortran-comment-hook)))))))))
956
957 (defun fortran-line-number-indented-correctly-p ()
958 "Return t if current line's line number is correctly indented.
959 Do not call if there is no line number."
960 (save-excursion
961 (beginning-of-line)
962 (skip-chars-forward " \t")
963 (and (<= (current-column) fortran-line-number-indent)
964 (or (= (current-column) fortran-line-number-indent)
965 (progn (skip-chars-forward "0-9")
966 (= (current-column) 5))))))
967
968 (defun fortran-check-for-matching-do ()
969 "When called from a numbered statement, returns t if matching DO is found.
970 Otherwise return a nil."
971 (let (charnum
972 (case-fold-search t))
973 (save-excursion
974 (beginning-of-line)
975 (if (looking-at "[ \t]*[0-9]+")
976 (progn
977 (skip-chars-forward " \t")
978 (skip-chars-forward "0") ;skip past leading zeros
979 (setq charnum (buffer-substring (point)
980 (progn (skip-chars-forward "0-9")
981 (point))))
982 (beginning-of-line)
983 (and (re-search-backward
984 (concat
985 "\\(^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]\\)\\|\\(^[ \t0-9]*do\
986 [ \t]*0*"
987 charnum "\\b\\)\\|\\(^[ \t]*0*" charnum "\\b\\)")
988 nil t)
989 (looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum))))))))
990
991 (defun fortran-find-comment-start-skip ()
992 "Move to past `comment-start-skip' found on current line.
993 Return t if `comment-start-skip' found, nil if not."
994 ;;; In order to move point only if comment-start-skip is found,
995 ;;; this one uses a lot of save-excursions. Note that re-search-forward
996 ;;; moves point even if comment-start-skip is inside a string-constant.
997 ;;; Some code expects certain values for match-beginning and end
998 (interactive)
999 (let ((save-match-beginning) (save-match-end))
1000 (if (save-excursion
1001 (re-search-forward comment-start-skip
1002 (save-excursion (end-of-line) (point)) t))
1003 (progn
1004 (setq save-match-beginning (match-beginning 0))
1005 (setq save-match-end (match-end 0))
1006 (if (fortran-is-in-string-p (match-beginning 0))
1007 (progn
1008 (save-excursion
1009 (goto-char save-match-end)
1010 (fortran-find-comment-start-skip)) ; recurse for rest of line
1011 )
1012 (goto-char save-match-beginning)
1013 (re-search-forward comment-start-skip
1014 (save-excursion (end-of-line) (point)) t)
1015 (goto-char (match-end 0))
1016 t))
1017 nil)))
1018
1019 ;;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
1020 ;;; Test if TAB format continuation lines work.
1021 (defun fortran-is-in-string-p (where)
1022 "Return non-nil if POS (a buffer position) is inside a Fortran string,
1023 nil else."
1024 (save-excursion
1025 (goto-char where)
1026 (cond
1027 ((bolp) nil) ; bol is never inside a string
1028 ((save-excursion ; comment lines too
1029 (beginning-of-line)(looking-at comment-line-start-skip)) nil)
1030 (t (let (;; ok, serious now. Init some local vars:
1031 (parse-state '(0 nil nil nil nil nil 0))
1032 (quoted-comment-start (if comment-start
1033 (regexp-quote comment-start)))
1034 (not-done t)
1035 parse-limit
1036 end-of-line
1037 )
1038 ;; move to start of current statement
1039 (fortran-next-statement)
1040 (fortran-previous-statement)
1041 ;; now parse up to WHERE
1042 (while not-done
1043 (if (or ;; skip to next line if:
1044 ;; - comment line?
1045 (looking-at comment-line-start-skip)
1046 ;; - at end of line?
1047 (eolp)
1048 ;; - not in a string and after comment-start?
1049 (and (not (nth 3 parse-state))
1050 comment-start
1051 (equal comment-start
1052 (char-to-string (preceding-char)))))
1053 ;; get around a bug in forward-line in versions <= 18.57
1054 (if (or (> (forward-line 1) 0) (eobp))
1055 (setq not-done nil))
1056 ;; else:
1057 ;; if we are at beginning of code line, skip any
1058 ;; whitespace, labels and tab continuation markers.
1059 (if (bolp) (skip-chars-forward " \t0-9"))
1060 ;; if we are in column <= 5 now, check for continuation char
1061 (cond ((= 5 (current-column)) (forward-char 1))
1062 ((and (< (current-column) 5)
1063 (equal fortran-continuation-string
1064 (char-to-string (following-char)))
1065 (forward-char 1))))
1066 ;; find out parse-limit from here
1067 (setq end-of-line (save-excursion (end-of-line)(point)))
1068 (setq parse-limit (min where end-of-line))
1069 ;; parse max up to comment-start, if non-nil and in current line
1070 (if comment-start
1071 (save-excursion
1072 (if (re-search-forward quoted-comment-start end-of-line t)
1073 (setq parse-limit (min (point) parse-limit)))))
1074 ;; now parse if still in limits
1075 (if (< (point) where)
1076 (setq parse-state (parse-partial-sexp
1077 (point) parse-limit nil nil parse-state))
1078 (setq not-done nil))
1079 ))
1080 ;; result is
1081 (nth 3 parse-state))))))
1082
1083 (defun fortran-auto-fill-mode (arg)
1084 "Toggle fortran-auto-fill mode.
1085 With ARG, turn `fortran-auto-fill' mode on iff ARG is positive.
1086 In `fortran-auto-fill' mode, inserting a space at a column beyond `fill-column'
1087 automatically breaks the line at a previous space."
1088 (interactive "P")
1089 (prog1 (setq auto-fill-function
1090 (if (if (null arg)
1091 (not auto-fill-function)
1092 (> (prefix-numeric-value arg) 0))
1093 'fortran-indent-line
1094 nil))
1095 ;; update mode-line
1096 (set-buffer-modified-p (buffer-modified-p))))
1097
1098 (defun fortran-do-auto-fill ()
1099 (interactive)
1100 (let* ((opoint (point))
1101 (bol (save-excursion (beginning-of-line) (point)))
1102 (eol (save-excursion (end-of-line) (point)))
1103 (bos (min eol (+ bol (fortran-current-line-indentation))))
1104 (quote
1105 (save-excursion
1106 (goto-char bol)
1107 (if (looking-at comment-line-start-skip)
1108 nil ; OK to break quotes on comment lines.
1109 (move-to-column fill-column)
1110 (cond ((fortran-is-in-string-p (point))
1111 (save-excursion (re-search-backward "[^']'[^']" bol t)
1112 (if fortran-break-before-delimiters
1113 (point)
1114 (1+ (point)))))
1115 (t nil)))))
1116 ;;
1117 ;; decide where to split the line. If a position for a quoted
1118 ;; string was found above then use that, else break the line
1119 ;; before the last delimiter.
1120 ;; Delimiters are whitespace, commas, and operators.
1121 ;; Will break before a pair of *'s.
1122 ;;
1123 (fill-point
1124 (or quote
1125 (save-excursion
1126 (move-to-column (1+ fill-column))
1127 (skip-chars-backward "^ \t\n,'+-/*=)"
1128 ;;; (if fortran-break-before-delimiters
1129 ;;; "^ \t\n,'+-/*=" "^ \t\n,'+-/*=)")
1130 )
1131 (if (<= (point) (1+ bos))
1132 (progn
1133 (move-to-column (1+ fill-column))
1134 ;;;what is this doing???
1135 (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t))
1136 (goto-char bol))))
1137 (if (bolp)
1138 (re-search-forward "[ \t]" opoint t)
1139 (forward-char -1)
1140 (if (looking-at "'")
1141 (forward-char 1)
1142 (skip-chars-backward " \t\*")))
1143 (if fortran-break-before-delimiters
1144 (point)
1145 (1+ (point))))))
1146 )
1147 ;; if we are in an in-line comment, don't break unless the
1148 ;; line of code is longer than it should be. Otherwise
1149 ;; break the line at the column computed above.
1150 ;;
1151 ;; Need to use fortran-find-comment-start-skip to make sure that quoted !'s
1152 ;; don't prevent a break.
1153 (if (not (or (save-excursion
1154 (if (and (re-search-backward comment-start-skip bol t)
1155 (not (fortran-is-in-string-p (point))))
1156 (progn
1157 (skip-chars-backward " \t")
1158 (< (current-column) (1+ fill-column)))))
1159 (save-excursion
1160 (goto-char fill-point)
1161 (bolp))))
1162 (if (> (save-excursion
1163 (goto-char fill-point) (current-column))
1164 (1+ fill-column))
1165 (progn (goto-char fill-point)
1166 (fortran-break-line))
1167 (save-excursion
1168 (if (> (save-excursion
1169 (goto-char fill-point)
1170 (current-column))
1171 (+ (calculate-fortran-indent) fortran-continuation-indent))
1172 (progn
1173 (goto-char fill-point)
1174 (fortran-break-line))))))
1175 ))
1176 (defun fortran-break-line ()
1177 (let ((opoint (point))
1178 (bol (save-excursion (beginning-of-line) (point)))
1179 (eol (save-excursion (end-of-line) (point)))
1180 (comment-string nil))
1181
1182 (save-excursion
1183 (if (and comment-start-skip (fortran-find-comment-start-skip))
1184 (progn
1185 (re-search-backward comment-start-skip bol t)
1186 (setq comment-string (buffer-substring (point) eol))
1187 (delete-region (point) eol))))
1188 ;;; Forward line 1 really needs to go to next non white line
1189 (if (save-excursion (forward-line 1)
1190 (or (looking-at " [^ 0\n]")
1191 (looking-at "\t[1-9]")))
1192 (progn
1193 (forward-line 1)
1194 (delete-indentation)
1195 (delete-char 2)
1196 (delete-horizontal-space)
1197 (fortran-do-auto-fill))
1198 (fortran-split-line))
1199 (if comment-string
1200 (save-excursion
1201 (goto-char bol)
1202 (end-of-line)
1203 (delete-horizontal-space)
1204 (indent-to (fortran-comment-hook))
1205 (insert comment-string)))))
1206
1207 (defun fortran-analyze-file-format ()
1208 "Returns nil if Fixed format is used, t if TAB formatting is used.
1209 Use `fortran-tab-mode-default' if no non-comment statements are found in the
1210 file before the end or the first `fortran-analyze-depth' lines."
1211 (let ((i 0))
1212 (save-excursion
1213 (goto-char (point-min))
1214 (setq i 0)
1215 (while (not (or
1216 (eobp)
1217 (looking-at "\t")
1218 (looking-at " ")
1219 (> i fortran-analyze-depth)))
1220 (forward-line)
1221 (setq i (1+ i)))
1222 (cond
1223 ((looking-at "\t") t)
1224 ((looking-at " ") nil)
1225 (fortran-tab-mode-default t)
1226 (t nil)))))
1227
1228 (or (assq 'fortran-tab-mode-string minor-mode-alist)
1229 (setq minor-mode-alist (cons
1230 '(fortran-tab-mode-string
1231 (indent-tabs-mode fortran-tab-mode-string))
1232 minor-mode-alist)))
1233
1234 (provide 'fortran)
1235
1236 ;;; fortran.el ends here
1237