(Search-based Fontification): Correct a typo.
[emacs.git] / lisp / progmodes / icon.el
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1 ;;; icon.el --- mode for editing Icon code
3 ;; Copyright (C) 1989, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4 ;; Free Software Foundation, Inc.
6 ;; Author: Chris Smith <csmith@convex.com>
7 ;; Created: 15 Feb 89
8 ;; Keywords: languages
10 ;; This file is part of GNU Emacs.
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 3 of the License, or
15 ;; (at your option) any later version.
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.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
25 ;;; Commentary:
27 ;; A major mode for editing the Icon programming language.
29 ;;; Code:
31 (defvar icon-mode-abbrev-table nil
32 "Abbrev table in use in Icon-mode buffers.")
33 (define-abbrev-table 'icon-mode-abbrev-table ())
35 (defvar icon-mode-map ()
36 "Keymap used in Icon mode.")
37 (if icon-mode-map
39 (let ((map (make-sparse-keymap "Icon")))
40 (setq icon-mode-map (make-sparse-keymap))
41 (define-key icon-mode-map "{" 'electric-icon-brace)
42 (define-key icon-mode-map "}" 'electric-icon-brace)
43 (define-key icon-mode-map "\e\C-h" 'mark-icon-function)
44 (define-key icon-mode-map "\e\C-a" 'beginning-of-icon-defun)
45 (define-key icon-mode-map "\e\C-e" 'end-of-icon-defun)
46 (define-key icon-mode-map "\e\C-q" 'indent-icon-exp)
47 (define-key icon-mode-map "\177" 'backward-delete-char-untabify)
49 (define-key icon-mode-map [menu-bar] (make-sparse-keymap "Icon"))
50 (define-key icon-mode-map [menu-bar icon]
51 (cons "Icon" map))
52 (define-key map [beginning-of-icon-defun] '("Beginning of function" . beginning-of-icon-defun))
53 (define-key map [end-of-icon-defun] '("End of function" . end-of-icon-defun))
54 (define-key map [comment-region] '("Comment Out Region" . comment-region))
55 (define-key map [indent-region] '("Indent Region" . indent-region))
56 (define-key map [indent-line] '("Indent Line" . icon-indent-command))
57 (put 'eval-region 'menu-enable 'mark-active)
58 (put 'comment-region 'menu-enable 'mark-active)
59 (put 'indent-region 'menu-enable 'mark-active)))
61 (defvar icon-mode-syntax-table nil
62 "Syntax table in use in Icon-mode buffers.")
64 (if icon-mode-syntax-table
66 (setq icon-mode-syntax-table (make-syntax-table))
67 (modify-syntax-entry ?\\ "\\" icon-mode-syntax-table)
68 (modify-syntax-entry ?# "<" icon-mode-syntax-table)
69 (modify-syntax-entry ?\n ">" icon-mode-syntax-table)
70 (modify-syntax-entry ?$ "." icon-mode-syntax-table)
71 (modify-syntax-entry ?/ "." icon-mode-syntax-table)
72 (modify-syntax-entry ?* "." icon-mode-syntax-table)
73 (modify-syntax-entry ?+ "." icon-mode-syntax-table)
74 (modify-syntax-entry ?- "." icon-mode-syntax-table)
75 (modify-syntax-entry ?= "." icon-mode-syntax-table)
76 (modify-syntax-entry ?% "." icon-mode-syntax-table)
77 (modify-syntax-entry ?< "." icon-mode-syntax-table)
78 (modify-syntax-entry ?> "." icon-mode-syntax-table)
79 (modify-syntax-entry ?& "." icon-mode-syntax-table)
80 (modify-syntax-entry ?| "." icon-mode-syntax-table)
81 (modify-syntax-entry ?\' "\"" icon-mode-syntax-table))
83 (defgroup icon nil
84 "Mode for editing Icon code."
85 :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
86 :group 'languages)
88 (defcustom icon-indent-level 4
89 "*Indentation of Icon statements with respect to containing block."
90 :type 'integer
91 :group 'icon)
93 (defcustom icon-brace-imaginary-offset 0
94 "*Imagined indentation of a Icon open brace that actually follows a statement."
95 :type 'integer
96 :group 'icon)
98 (defcustom icon-brace-offset 0
99 "*Extra indentation for braces, compared with other text in same context."
100 :type 'integer
101 :group 'icon)
103 (defcustom icon-continued-statement-offset 4
104 "*Extra indent for Icon lines not starting new statements."
105 :type 'integer
106 :group 'icon)
108 (defcustom icon-continued-brace-offset 0
109 "*Extra indent for Icon substatements that start with open-braces.
110 This is in addition to `icon-continued-statement-offset'."
111 :type 'integer
112 :group 'icon)
114 (defcustom icon-auto-newline nil
115 "*Non-nil means automatically newline before and after braces Icon code.
116 This applies when braces are inserted."
117 :type 'boolean
118 :group 'icon)
120 (defcustom icon-tab-always-indent t
121 "*Non-nil means TAB in Icon mode should always reindent the current line.
122 It will then reindent, regardless of where in the line point is
123 when the TAB command is used."
124 :type 'boolean
125 :group 'icon)
127 (defvar icon-imenu-generic-expression
128 '((nil "^[ \t]*procedure[ \t]+\\(\\sw+\\)[ \t]*(" 1))
129 "Imenu expression for Icon mode. See `imenu-generic-expression'.")
133 ;;;###autoload
134 (defun icon-mode ()
135 "Major mode for editing Icon code.
136 Expression and list commands understand all Icon brackets.
137 Tab indents for Icon code.
138 Paragraphs are separated by blank lines only.
139 Delete converts tabs to spaces as it moves back.
140 \\{icon-mode-map}
141 Variables controlling indentation style:
142 icon-tab-always-indent
143 Non-nil means TAB in Icon mode should always reindent the current line,
144 regardless of where in the line point is when the TAB command is used.
145 icon-auto-newline
146 Non-nil means automatically newline before and after braces
147 inserted in Icon code.
148 icon-indent-level
149 Indentation of Icon statements within surrounding block.
150 The surrounding block's indentation is the indentation
151 of the line on which the open-brace appears.
152 icon-continued-statement-offset
153 Extra indentation given to a substatement, such as the
154 then-clause of an if or body of a while.
155 icon-continued-brace-offset
156 Extra indentation given to a brace that starts a substatement.
157 This is in addition to `icon-continued-statement-offset'.
158 icon-brace-offset
159 Extra indentation for line if it starts with an open brace.
160 icon-brace-imaginary-offset
161 An open brace following other text is treated as if it were
162 this far to the right of the start of its line.
164 Turning on Icon mode calls the value of the variable `icon-mode-hook'
165 with no args, if that value is non-nil."
166 (interactive)
167 (kill-all-local-variables)
168 (use-local-map icon-mode-map)
169 (setq major-mode 'icon-mode)
170 (setq mode-name "Icon")
171 (setq local-abbrev-table icon-mode-abbrev-table)
172 (set-syntax-table icon-mode-syntax-table)
173 (make-local-variable 'paragraph-start)
174 (setq paragraph-start (concat "$\\|" page-delimiter))
175 (make-local-variable 'paragraph-separate)
176 (setq paragraph-separate paragraph-start)
177 (make-local-variable 'indent-line-function)
178 (setq indent-line-function 'icon-indent-line)
179 (make-local-variable 'require-final-newline)
180 (setq require-final-newline mode-require-final-newline)
181 (make-local-variable 'comment-start)
182 (setq comment-start "# ")
183 (make-local-variable 'comment-end)
184 (setq comment-end "")
185 (make-local-variable 'comment-start-skip)
186 (setq comment-start-skip "# *")
187 (make-local-variable 'comment-indent-function)
188 (setq comment-indent-function 'icon-comment-indent)
189 (set (make-local-variable 'indent-line-function) 'icon-indent-line)
190 ;; font-lock support
191 (setq font-lock-defaults
192 '((icon-font-lock-keywords
193 icon-font-lock-keywords-1 icon-font-lock-keywords-2)
194 nil nil ((?_ . "w")) beginning-of-defun
195 ;; Obsoleted by Emacs 19.35 parse-partial-sexp's COMMENTSTOP.
196 ;(font-lock-comment-start-regexp . "#")
197 (font-lock-mark-block-function . mark-defun)))
198 ;; imenu support
199 (make-local-variable 'imenu-generic-expression)
200 (setq imenu-generic-expression icon-imenu-generic-expression)
201 ;; hideshow support
202 ;; we start from the assertion that `hs-special-modes-alist' is autoloaded.
203 (unless (assq 'icon-mode hs-special-modes-alist)
204 (setq hs-special-modes-alist
205 (cons '(icon-mode "\\<procedure\\>" "\\<end\\>" nil
206 icon-forward-sexp-function)
207 hs-special-modes-alist)))
208 (run-mode-hooks 'icon-mode-hook))
210 ;; This is used by indent-for-comment to decide how much to
211 ;; indent a comment in Icon code based on its context.
212 (defun icon-comment-indent ()
213 (if (looking-at "^#") 0 comment-column))
215 (defun electric-icon-brace (arg)
216 "Insert character and correct line's indentation."
217 (interactive "P")
218 (let (insertpos)
219 (if (and (not arg)
220 (eolp)
221 (or (save-excursion
222 (skip-chars-backward " \t")
223 (bolp))
224 (if icon-auto-newline
225 (progn (icon-indent-line) (newline) t)
226 nil)))
227 (progn
228 (insert last-command-event)
229 (icon-indent-line)
230 (if icon-auto-newline
231 (progn
232 (newline)
233 ;; (newline) may have done auto-fill
234 (setq insertpos (- (point) 2))
235 (icon-indent-line)))
236 (save-excursion
237 (if insertpos (goto-char (1+ insertpos)))
238 (delete-char -1))))
239 (if insertpos
240 (save-excursion
241 (goto-char insertpos)
242 (self-insert-command (prefix-numeric-value arg)))
243 (self-insert-command (prefix-numeric-value arg)))))
245 (defun icon-indent-command (&optional whole-exp)
246 "Indent current line as Icon code, or in some cases insert a tab character.
247 If `icon-tab-always-indent' is non-nil (the default), always indent current
248 line. Otherwise, indent the current line only if point is at the left margin
249 or in the line's indentation; otherwise insert a tab.
251 A numeric argument, regardless of its value, means indent rigidly all the
252 lines of the expression starting after point so that this line becomes
253 properly indented. The relative indentation among the lines of the
254 expression are preserved."
255 (interactive "P")
256 (if whole-exp
257 ;; If arg, always indent this line as Icon
258 ;; and shift remaining lines of expression the same amount.
259 (let ((shift-amt (icon-indent-line))
260 beg end)
261 (save-excursion
262 (if icon-tab-always-indent
263 (beginning-of-line))
264 (setq beg (point))
265 (forward-sexp 1)
266 (setq end (point))
267 (goto-char beg)
268 (forward-line 1)
269 (setq beg (point)))
270 (if (> end beg)
271 (indent-code-rigidly beg end shift-amt "#")))
272 (if (and (not icon-tab-always-indent)
273 (save-excursion
274 (skip-chars-backward " \t")
275 (not (bolp))))
276 (insert-tab)
277 (icon-indent-line))))
279 (defun icon-indent-line ()
280 "Indent current line as Icon code.
281 Return the amount the indentation changed by."
282 (let ((indent (calculate-icon-indent nil))
283 beg shift-amt
284 (case-fold-search nil)
285 (pos (- (point-max) (point))))
286 (beginning-of-line)
287 (setq beg (point))
288 (cond ((eq indent nil)
289 (setq indent (current-indentation)))
290 ((looking-at "^#")
291 (setq indent 0))
293 (skip-chars-forward " \t")
294 (if (listp indent) (setq indent (car indent)))
295 (cond ((and (looking-at "else\\b")
296 (not (looking-at "else\\s_")))
297 (setq indent (save-excursion
298 (icon-backward-to-start-of-if)
299 (current-indentation))))
300 ((or (= (following-char) ?})
301 (looking-at "end\\b"))
302 (setq indent (- indent icon-indent-level)))
303 ((= (following-char) ?{)
304 (setq indent (+ indent icon-brace-offset))))))
305 (skip-chars-forward " \t")
306 (setq shift-amt (- indent (current-column)))
307 (if (zerop shift-amt)
308 (if (> (- (point-max) pos) (point))
309 (goto-char (- (point-max) pos)))
310 (delete-region beg (point))
311 (indent-to indent)
312 ;; If initial point was within line's indentation,
313 ;; position after the indentation. Else stay at same point in text.
314 (if (> (- (point-max) pos) (point))
315 (goto-char (- (point-max) pos))))
316 shift-amt))
318 (defun calculate-icon-indent (&optional parse-start)
319 "Return appropriate indentation for current line as Icon code.
320 In usual case returns an integer: the column to indent to.
321 Returns nil if line starts inside a string, t if in a comment."
322 (save-excursion
323 (beginning-of-line)
324 (let ((indent-point (point))
325 (case-fold-search nil)
326 state
327 containing-sexp
328 toplevel)
329 (if parse-start
330 (goto-char parse-start)
331 (setq toplevel (beginning-of-icon-defun)))
332 (while (< (point) indent-point)
333 (setq parse-start (point))
334 (setq state (parse-partial-sexp (point) indent-point 0))
335 (setq containing-sexp (car (cdr state))))
336 (cond ((or (nth 3 state) (nth 4 state))
337 ;; return nil or t if should not change this line
338 (nth 4 state))
339 ((and containing-sexp
340 (/= (char-after containing-sexp) ?{))
341 ;; line is expression, not statement:
342 ;; indent to just after the surrounding open.
343 (goto-char (1+ containing-sexp))
344 (current-column))
346 (if toplevel
347 ;; Outside any procedures.
348 (progn (icon-backward-to-noncomment (point-min))
349 (if (icon-is-continuation-line)
350 icon-continued-statement-offset 0))
351 ;; Statement level.
352 (if (null containing-sexp)
353 (progn (beginning-of-icon-defun)
354 (setq containing-sexp (point))))
355 (goto-char indent-point)
356 ;; Is it a continuation or a new statement?
357 ;; Find previous non-comment character.
358 (icon-backward-to-noncomment containing-sexp)
359 ;; Now we get the answer.
360 (if (icon-is-continuation-line)
361 ;; This line is continuation of preceding line's statement;
362 ;; indent icon-continued-statement-offset more than the
363 ;; first line of the statement.
364 (progn
365 (icon-backward-to-start-of-continued-exp containing-sexp)
366 (+ icon-continued-statement-offset (current-column)
367 (if (save-excursion (goto-char indent-point)
368 (skip-chars-forward " \t")
369 (eq (following-char) ?{))
370 icon-continued-brace-offset 0)))
371 ;; This line starts a new statement.
372 ;; Position following last unclosed open.
373 (goto-char containing-sexp)
374 ;; Is line first statement after an open-brace?
376 ;; If no, find that first statement and indent like it.
377 (save-excursion
378 (if (looking-at "procedure\\s ")
379 (forward-sexp 3)
380 (forward-char 1))
381 (while (progn (skip-chars-forward " \t\n")
382 (looking-at "#"))
383 ;; Skip over comments following openbrace.
384 (forward-line 1))
385 ;; The first following code counts
386 ;; if it is before the line we want to indent.
387 (and (< (point) indent-point)
388 (current-column)))
389 ;; If no previous statement,
390 ;; indent it relative to line brace is on.
391 ;; For open brace in column zero, don't let statement
392 ;; start there too. If icon-indent-level is zero,
393 ;; use icon-brace-offset + icon-continued-statement-offset
394 ;; instead.
395 ;; For open-braces not the first thing in a line,
396 ;; add in icon-brace-imaginary-offset.
397 (+ (if (and (bolp) (zerop icon-indent-level))
398 (+ icon-brace-offset
399 icon-continued-statement-offset)
400 icon-indent-level)
401 ;; Move back over whitespace before the openbrace.
402 ;; If openbrace is not first nonwhite thing on the line,
403 ;; add the icon-brace-imaginary-offset.
404 (progn (skip-chars-backward " \t")
405 (if (bolp) 0 icon-brace-imaginary-offset))
406 ;; Get initial indentation of the line we are on.
407 (current-indentation))))))))))
409 ;; List of words to check for as the last thing on a line.
410 ;; If cdr is t, next line is a continuation of the same statement,
411 ;; if cdr is nil, next line starts a new (possibly indented) statement.
413 (defconst icon-resword-alist
414 '(("by" . t) ("case" . t) ("create") ("do") ("dynamic" . t) ("else")
415 ("every" . t) ("if" . t) ("global" . t) ("initial" . t)
416 ("link" . t) ("local" . t) ("of") ("record" . t) ("repeat" . t)
417 ("static" . t) ("then") ("to" . t) ("until" . t) ("while" . t)))
419 (defun icon-is-continuation-line ()
420 (let* ((ch (preceding-char))
421 (ch-syntax (char-syntax ch)))
422 (if (eq ch-syntax ?w)
423 (assoc (buffer-substring
424 (progn (forward-word -1) (point))
425 (progn (forward-word 1) (point)))
426 icon-resword-alist)
427 (not (memq ch '(0 ?\; ?\} ?\{ ?\) ?\] ?\" ?\' ?\# ?\, ?\. ?\n))))))
429 (defun icon-backward-to-noncomment (lim)
430 (let (opoint stop)
431 (while (not stop)
432 (skip-chars-backward " \t\n\f" lim)
433 (setq opoint (point))
434 (beginning-of-line)
435 (if (and (nth 5 (parse-partial-sexp (point) opoint))
436 (< lim (point)))
437 (search-backward "#")
438 (setq stop t)))))
440 (defun icon-backward-to-start-of-continued-exp (lim)
441 (if (memq (preceding-char) '(?\) ?\]))
442 (forward-sexp -1))
443 (beginning-of-line)
444 (skip-chars-forward " \t")
445 (cond
446 ((<= (point) lim) (goto-char (1+ lim)))
447 ((not (icon-is-continued-line)) 0)
448 ((and (eq (char-syntax (following-char)) ?w)
449 (cdr
450 (assoc (buffer-substring (point)
451 (save-excursion (forward-word 1) (point)))
452 icon-resword-alist))) 0)
453 (t (end-of-line 0) (icon-backward-to-start-of-continued-exp lim))))
455 (defun icon-is-continued-line ()
456 (save-excursion
457 (end-of-line 0)
458 (icon-is-continuation-line)))
460 (defun icon-backward-to-start-of-if (&optional limit)
461 "Move to the start of the last \"unbalanced\" if."
462 (or limit (setq limit (save-excursion (beginning-of-icon-defun) (point))))
463 (let ((if-level 1)
464 (case-fold-search nil))
465 (while (not (zerop if-level))
466 (backward-sexp 1)
467 (cond ((looking-at "else\\b")
468 (setq if-level (1+ if-level)))
469 ((looking-at "if\\b")
470 (setq if-level (1- if-level)))
471 ((< (point) limit)
472 (setq if-level 0)
473 (goto-char limit))))))
475 (defun mark-icon-function ()
476 "Put mark at end of Icon function, point at beginning."
477 (interactive)
478 (push-mark (point))
479 (end-of-icon-defun)
480 (push-mark (point))
481 (beginning-of-line 0)
482 (beginning-of-icon-defun))
484 (defun beginning-of-icon-defun ()
485 "Go to the start of the enclosing procedure; return t if at top level."
486 (interactive)
487 (if (re-search-backward "^procedure\\s \\|^end[ \t\n]" (point-min) 'move)
488 (looking-at "e")
491 (defun end-of-icon-defun ()
492 (interactive)
493 (if (not (bobp)) (forward-char -1))
494 (re-search-forward "\\(\\s \\|^\\)end\\(\\s \\|$\\)" (point-max) 'move)
495 (forward-word -1)
496 (forward-line 1))
498 (defun indent-icon-exp ()
499 "Indent each line of the Icon grouping following point."
500 (interactive)
501 (let ((indent-stack (list nil))
502 (contain-stack (list (point)))
503 (case-fold-search nil)
504 restart outer-loop-done inner-loop-done state ostate
505 this-indent last-sexp last-depth
506 at-else at-brace at-do
507 (opoint (point))
508 (next-depth 0))
509 (save-excursion
510 (forward-sexp 1))
511 (save-excursion
512 (setq outer-loop-done nil)
513 (while (and (not (eobp)) (not outer-loop-done))
514 (setq last-depth next-depth)
515 ;; Compute how depth changes over this line
516 ;; plus enough other lines to get to one that
517 ;; does not end inside a comment or string.
518 ;; Meanwhile, do appropriate indentation on comment lines.
519 (setq inner-loop-done nil)
520 (while (and (not inner-loop-done)
521 (not (and (eobp) (setq outer-loop-done t))))
522 (setq ostate state)
523 (setq state (parse-partial-sexp (point) (progn (end-of-line) (point))
524 nil nil state))
525 (setq next-depth (car state))
526 (if (and (car (cdr (cdr state)))
527 (>= (car (cdr (cdr state))) 0))
528 (setq last-sexp (car (cdr (cdr state)))))
529 (if (or (nth 4 ostate))
530 (icon-indent-line))
531 (if (or (nth 3 state))
532 (forward-line 1)
533 (setq inner-loop-done t)))
534 (if (<= next-depth 0)
535 (setq outer-loop-done t))
536 (if outer-loop-done
538 (if (/= last-depth next-depth)
539 (setq last-sexp nil))
540 (while (> last-depth next-depth)
541 (setq indent-stack (cdr indent-stack)
542 contain-stack (cdr contain-stack)
543 last-depth (1- last-depth)))
544 (while (< last-depth next-depth)
545 (setq indent-stack (cons nil indent-stack)
546 contain-stack (cons nil contain-stack)
547 last-depth (1+ last-depth)))
548 (if (null (car contain-stack))
549 (setcar contain-stack (or (car (cdr state))
550 (save-excursion (forward-sexp -1)
551 (point)))))
552 (forward-line 1)
553 (skip-chars-forward " \t")
554 (if (eolp)
556 (if (and (car indent-stack)
557 (>= (car indent-stack) 0))
558 ;; Line is on an existing nesting level.
559 ;; Lines inside parens are handled specially.
560 (if (/= (char-after (car contain-stack)) ?{)
561 (setq this-indent (car indent-stack))
562 ;; Line is at statement level.
563 ;; Is it a new statement? Is it an else?
564 ;; Find last non-comment character before this line
565 (save-excursion
566 (setq at-else (looking-at "else\\W"))
567 (setq at-brace (= (following-char) ?{))
568 (icon-backward-to-noncomment opoint)
569 (if (icon-is-continuation-line)
570 ;; Preceding line did not end in comma or semi;
571 ;; indent this line icon-continued-statement-offset
572 ;; more than previous.
573 (progn
574 (icon-backward-to-start-of-continued-exp (car contain-stack))
575 (setq this-indent
576 (+ icon-continued-statement-offset (current-column)
577 (if at-brace icon-continued-brace-offset 0))))
578 ;; Preceding line ended in comma or semi;
579 ;; use the standard indent for this level.
580 (if at-else
581 (progn (icon-backward-to-start-of-if opoint)
582 (setq this-indent (current-indentation)))
583 (setq this-indent (car indent-stack))))))
584 ;; Just started a new nesting level.
585 ;; Compute the standard indent for this level.
586 (let ((val (calculate-icon-indent
587 (if (car indent-stack)
588 (- (car indent-stack))))))
589 (setcar indent-stack
590 (setq this-indent val))))
591 ;; Adjust line indentation according to its contents
592 (if (or (= (following-char) ?})
593 (looking-at "end\\b"))
594 (setq this-indent (- this-indent icon-indent-level)))
595 (if (= (following-char) ?{)
596 (setq this-indent (+ this-indent icon-brace-offset)))
597 ;; Put chosen indentation into effect.
598 (or (= (current-column) this-indent)
599 (progn
600 (delete-region (point) (progn (beginning-of-line) (point)))
601 (indent-to this-indent)))
602 ;; Indent any comment following the text.
603 (or (looking-at comment-start-skip)
604 (if (re-search-forward comment-start-skip (save-excursion (end-of-line) (point)) t)
605 (progn (indent-for-comment) (beginning-of-line))))))))))
607 (defconst icon-font-lock-keywords-1
608 (eval-when-compile
609 (list
610 ;; Fontify procedure name definitions.
611 '("^[ \t]*\\(procedure\\)\\>[ \t]*\\(\\sw+\\)?"
612 (1 font-lock-builtin-face) (2 font-lock-function-name-face nil t))))
613 "Subdued level highlighting for Icon mode.")
615 (defconst icon-font-lock-keywords-2
616 (append
617 icon-font-lock-keywords-1
618 (eval-when-compile
619 (list
620 ;; Fontify all type specifiers.
621 (cons
622 (regexp-opt '("null" "string" "co-expression" "table" "integer"
623 "cset" "set" "real" "file" "list") 'words)
624 'font-lock-type-face)
625 ;; Fontify all keywords.
627 (cons
628 (regexp-opt
629 '("break" "do" "next" "repeat" "to" "by" "else" "if" "not" "return"
630 "until" "case" "of" "while" "create" "every" "suspend" "default"
631 "fail" "record" "then") 'words)
632 'font-lock-keyword-face)
633 ;; "end" "initial"
634 (cons (regexp-opt '("end" "initial") 'words)
635 'font-lock-builtin-face)
636 ;; Fontify all system variables.
637 (cons
638 (regexp-opt
639 '("&allocated" "&ascii" "&clock" "&col" "&collections" "&column"
640 "&control" "&cset" "&current" "&date" "&dateline" "&digits" "&dump"
641 "&e" "&error" "&errornumber" "&errortext" "&errorvalue" "&errout"
642 "&eventcode" "&eventsource" "&eventvalue" "&fail" "&features"
643 "&file" "&host" "&input" "&interval" "&lcase" "&ldrag" "&letters"
644 "&level" "&line" "&lpress" "&lrelease" "&main" "&mdrag" "&meta"
645 "&mpress" "&mrelease" "&null" "&output" "&phi" "&pi" "&pos"
646 "&progname" "&random" "&rdrag" "&regions" "&resize" "&row"
647 "&rpress" "&rrelease" "&shift" "&source" "&storage" "&subject"
648 "&time" "&trace" "&ucase" "&version" "&window" "&x" "&y") t)
649 'font-lock-constant-face)
650 (cons ;; global local static declarations and link files
651 (concat
652 "^[ \t]*"
653 (regexp-opt '("global" "link" "local" "static") t)
654 "\\(\\sw+\\>\\)*")
655 '((1 font-lock-builtin-face)
656 (font-lock-match-c-style-declaration-item-and-skip-to-next
657 (goto-char (or (match-beginning 2) (match-end 1))) nil
658 (1 (if (match-beginning 2)
659 font-lock-function-name-face
660 font-lock-variable-name-face)))))
662 (cons ;; $define $elif $ifdef $ifndef $undef
663 (concat "^"
664 (regexp-opt'("$define" "$elif" "$ifdef" "$ifndef" "$undef") t)
665 "\\>[ \t]*\\([^ \t\n]+\\)?")
666 '((1 font-lock-builtin-face)
667 (4 font-lock-variable-name-face nil t)))
668 (cons ;; $dump $endif $else $include
669 (concat
670 "^" (regexp-opt'("$dump" "$endif" "$else" "$include") t) "\\>" )
671 'font-lock-builtin-face)
672 (cons ;; $warning $error
673 (concat "^" (regexp-opt '("$warning" "$error") t)
674 "\\>[ \t]*\\(.+\\)?")
675 '((1 font-lock-builtin-face) (3 font-lock-warning-face nil t))))))
676 "Gaudy level highlighting for Icon mode.")
678 (defvar icon-font-lock-keywords icon-font-lock-keywords-1
679 "Default expressions to highlight in `icon-mode'.")
681 ;;;used by hs-minor-mode
682 (defun icon-forward-sexp-function (arg)
683 (if (< arg 0)
684 (beginning-of-icon-defun)
685 (end-of-icon-defun)
686 (forward-char -1)))
688 (provide 'icon)
690 ;; arch-tag: 8abf8c99-e7df-44af-a58f-ef5ed2ee52cb
691 ;;; icon.el ends here