1;;; icon.el --- mode for editing Icon code 2 3;; Copyright (C) 1989, 2001, 2002, 2003, 2004, 2005, 2006, 2007 4;; Free Software Foundation, Inc. 5 6;; Author: Chris Smith <csmith@convex.com> 7;; Created: 15 Feb 89 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 the 24;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 25;; Boston, MA 02110-1301, USA. 26 27;;; Commentary: 28 29;; A major mode for editing the Icon programming language. 30 31;;; Code: 32 33(defvar icon-mode-abbrev-table nil 34 "Abbrev table in use in Icon-mode buffers.") 35(define-abbrev-table 'icon-mode-abbrev-table ()) 36 37(defvar icon-mode-map () 38 "Keymap used in Icon mode.") 39(if icon-mode-map 40 () 41 (let ((map (make-sparse-keymap "Icon"))) 42 (setq icon-mode-map (make-sparse-keymap)) 43 (define-key icon-mode-map "{" 'electric-icon-brace) 44 (define-key icon-mode-map "}" 'electric-icon-brace) 45 (define-key icon-mode-map "\e\C-h" 'mark-icon-function) 46 (define-key icon-mode-map "\e\C-a" 'beginning-of-icon-defun) 47 (define-key icon-mode-map "\e\C-e" 'end-of-icon-defun) 48 (define-key icon-mode-map "\e\C-q" 'indent-icon-exp) 49 (define-key icon-mode-map "\177" 'backward-delete-char-untabify) 50 51 (define-key icon-mode-map [menu-bar] (make-sparse-keymap "Icon")) 52 (define-key icon-mode-map [menu-bar icon] 53 (cons "Icon" map)) 54 (define-key map [beginning-of-icon-defun] '("Beginning of function" . beginning-of-icon-defun)) 55 (define-key map [end-of-icon-defun] '("End of function" . end-of-icon-defun)) 56 (define-key map [comment-region] '("Comment Out Region" . comment-region)) 57 (define-key map [indent-region] '("Indent Region" . indent-region)) 58 (define-key map [indent-line] '("Indent Line" . icon-indent-command)) 59 (put 'eval-region 'menu-enable 'mark-active) 60 (put 'comment-region 'menu-enable 'mark-active) 61 (put 'indent-region 'menu-enable 'mark-active))) 62 63(defvar icon-mode-syntax-table nil 64 "Syntax table in use in Icon-mode buffers.") 65 66(if icon-mode-syntax-table 67 () 68 (setq icon-mode-syntax-table (make-syntax-table)) 69 (modify-syntax-entry ?\\ "\\" icon-mode-syntax-table) 70 (modify-syntax-entry ?# "<" icon-mode-syntax-table) 71 (modify-syntax-entry ?\n ">" 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) 82 (modify-syntax-entry ?| "." icon-mode-syntax-table) 83 (modify-syntax-entry ?\' "\"" icon-mode-syntax-table)) 84 85(defgroup icon nil 86 "Mode for editing Icon code." 87 :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces) 88 :group 'languages) 89 90(defcustom icon-indent-level 4 91 "*Indentation of Icon statements with respect to containing block." 92 :type 'integer 93 :group 'icon) 94 95(defcustom icon-brace-imaginary-offset 0 96 "*Imagined indentation of a Icon open brace that actually follows a statement." 97 :type 'integer 98 :group 'icon) 99 100(defcustom icon-brace-offset 0 101 "*Extra indentation for braces, compared with other text in same context." 102 :type 'integer 103 :group 'icon) 104 105(defcustom icon-continued-statement-offset 4 106 "*Extra indent for Icon lines not starting new statements." 107 :type 'integer 108 :group 'icon) 109 110(defcustom icon-continued-brace-offset 0 111 "*Extra indent for Icon substatements that start with open-braces. 112This is in addition to `icon-continued-statement-offset'." 113 :type 'integer 114 :group 'icon) 115 116(defcustom icon-auto-newline nil 117 "*Non-nil means automatically newline before and after braces Icon code. 118This applies when braces are inserted." 119 :type 'boolean 120 :group 'icon) 121 122(defcustom icon-tab-always-indent t 123 "*Non-nil means TAB in Icon mode should always reindent the current line. 124It will then reindent, regardless of where in the line point is 125when the TAB command is used." 126 :type 'boolean 127 :group 'icon) 128 129(defvar icon-imenu-generic-expression 130 '((nil "^[ \t]*procedure[ \t]+\\(\\sw+\\)[ \t]*(" 1)) 131 "Imenu expression for Icon mode. See `imenu-generic-expression'.") 132 133 134 135;;;###autoload 136(defun icon-mode () 137 "Major mode for editing Icon code. 138Expression and list commands understand all Icon brackets. 139Tab indents for Icon code. 140Paragraphs are separated by blank lines only. 141Delete converts tabs to spaces as it moves back. 142\\{icon-mode-map} 143Variables controlling indentation style: 144 icon-tab-always-indent 145 Non-nil means TAB in Icon mode should always reindent the current line, 146 regardless of where in the line point is when the TAB command is used. 147 icon-auto-newline 148 Non-nil means automatically newline before and after braces 149 inserted in Icon code. 150 icon-indent-level 151 Indentation of Icon statements within surrounding block. 152 The surrounding block's indentation is the indentation 153 of the line on which the open-brace appears. 154 icon-continued-statement-offset 155 Extra indentation given to a substatement, such as the 156 then-clause of an if or body of a while. 157 icon-continued-brace-offset 158 Extra indentation given to a brace that starts a substatement. 159 This is in addition to `icon-continued-statement-offset'. 160 icon-brace-offset 161 Extra indentation for line if it starts with an open brace. 162 icon-brace-imaginary-offset 163 An open brace following other text is treated as if it were 164 this far to the right of the start of its line. 165 166Turning on Icon mode calls the value of the variable `icon-mode-hook' 167with no args, if that value is non-nil." 168 (interactive) 169 (kill-all-local-variables) 170 (use-local-map icon-mode-map) 171 (setq major-mode 'icon-mode) 172 (setq mode-name "Icon") 173 (setq local-abbrev-table icon-mode-abbrev-table) 174 (set-syntax-table icon-mode-syntax-table) 175 (make-local-variable 'paragraph-start) 176 (setq paragraph-start (concat "$\\|" page-delimiter)) 177 (make-local-variable 'paragraph-separate) 178 (setq paragraph-separate paragraph-start) 179 (make-local-variable 'indent-line-function) 180 (setq indent-line-function 'icon-indent-line) 181 (make-local-variable 'require-final-newline) 182 (setq require-final-newline mode-require-final-newline) 183 (make-local-variable 'comment-start) 184 (setq comment-start "# ") 185 (make-local-variable 'comment-end) 186 (setq comment-end "") 187 (make-local-variable 'comment-start-skip) 188 (setq comment-start-skip "# *") 189 (make-local-variable 'comment-indent-function) 190 (setq comment-indent-function 'icon-comment-indent) 191 (set (make-local-variable 'indent-line-function) 'icon-indent-line) 192 ;; font-lock support 193 (setq font-lock-defaults 194 '((icon-font-lock-keywords 195 icon-font-lock-keywords-1 icon-font-lock-keywords-2) 196 nil nil ((?_ . "w")) beginning-of-defun 197 ;; Obsoleted by Emacs 19.35 parse-partial-sexp's COMMENTSTOP. 198 ;(font-lock-comment-start-regexp . "#") 199 (font-lock-mark-block-function . mark-defun))) 200 ;; imenu support 201 (make-local-variable 'imenu-generic-expression) 202 (setq imenu-generic-expression icon-imenu-generic-expression) 203 ;; hideshow support 204 ;; we start from the assertion that `hs-special-modes-alist' is autoloaded. 205 (unless (assq 'icon-mode hs-special-modes-alist) 206 (setq hs-special-modes-alist 207 (cons '(icon-mode "\\<procedure\\>" "\\<end\\>" nil 208 icon-forward-sexp-function) 209 hs-special-modes-alist))) 210 (run-mode-hooks 'icon-mode-hook)) 211 212;; This is used by indent-for-comment to decide how much to 213;; indent a comment in Icon code based on its context. 214(defun icon-comment-indent () 215 (if (looking-at "^#") 0 comment-column)) 216 217(defun electric-icon-brace (arg) 218 "Insert character and correct line's indentation." 219 (interactive "P") 220 (let (insertpos) 221 (if (and (not arg) 222 (eolp) 223 (or (save-excursion 224 (skip-chars-backward " \t") 225 (bolp)) 226 (if icon-auto-newline 227 (progn (icon-indent-line) (newline) t) 228 nil))) 229 (progn 230 (insert last-command-char) 231 (icon-indent-line) 232 (if icon-auto-newline 233 (progn 234 (newline) 235 ;; (newline) may have done auto-fill 236 (setq insertpos (- (point) 2)) 237 (icon-indent-line))) 238 (save-excursion 239 (if insertpos (goto-char (1+ insertpos))) 240 (delete-char -1)))) 241 (if insertpos 242 (save-excursion 243 (goto-char insertpos) 244 (self-insert-command (prefix-numeric-value arg))) 245 (self-insert-command (prefix-numeric-value arg))))) 246 247(defun icon-indent-command (&optional whole-exp) 248 "Indent current line as Icon code, or in some cases insert a tab character. 249If `icon-tab-always-indent' is non-nil (the default), always indent current 250line. Otherwise, indent the current line only if point is at the left margin 251or in the line's indentation; otherwise insert a tab. 252 253A numeric argument, regardless of its value, means indent rigidly all the 254lines of the expression starting after point so that this line becomes 255properly indented. The relative indentation among the lines of the 256expression are preserved." 257 (interactive "P") 258 (if whole-exp 259 ;; If arg, always indent this line as Icon 260 ;; and shift remaining lines of expression the same amount. 261 (let ((shift-amt (icon-indent-line)) 262 beg end) 263 (save-excursion 264 (if icon-tab-always-indent 265 (beginning-of-line)) 266 (setq beg (point)) 267 (forward-sexp 1) 268 (setq end (point)) 269 (goto-char beg) 270 (forward-line 1) 271 (setq beg (point))) 272 (if (> end beg) 273 (indent-code-rigidly beg end shift-amt "#"))) 274 (if (and (not icon-tab-always-indent) 275 (save-excursion 276 (skip-chars-backward " \t") 277 (not (bolp)))) 278 (insert-tab) 279 (icon-indent-line)))) 280 281(defun icon-indent-line () 282 "Indent current line as Icon code. 283Return the amount the indentation changed by." 284 (let ((indent (calculate-icon-indent nil)) 285 beg shift-amt 286 (case-fold-search nil) 287 (pos (- (point-max) (point)))) 288 (beginning-of-line) 289 (setq beg (point)) 290 (cond ((eq indent nil) 291 (setq indent (current-indentation))) 292 ((looking-at "^#") 293 (setq indent 0)) 294 (t 295 (skip-chars-forward " \t") 296 (if (listp indent) (setq indent (car indent))) 297 (cond ((and (looking-at "else\\b") 298 (not (looking-at "else\\s_"))) 299 (setq indent (save-excursion 300 (icon-backward-to-start-of-if) 301 (current-indentation)))) 302 ((or (= (following-char) ?}) 303 (looking-at "end\\b")) 304 (setq indent (- indent icon-indent-level))) 305 ((= (following-char) ?{) 306 (setq indent (+ indent icon-brace-offset)))))) 307 (skip-chars-forward " \t") 308 (setq shift-amt (- indent (current-column))) 309 (if (zerop shift-amt) 310 (if (> (- (point-max) pos) (point)) 311 (goto-char (- (point-max) pos))) 312 (delete-region beg (point)) 313 (indent-to indent) 314 ;; If initial point was within line's indentation, 315 ;; position after the indentation. Else stay at same point in text. 316 (if (> (- (point-max) pos) (point)) 317 (goto-char (- (point-max) pos)))) 318 shift-amt)) 319 320(defun calculate-icon-indent (&optional parse-start) 321 "Return appropriate indentation for current line as Icon code. 322In usual case returns an integer: the column to indent to. 323Returns nil if line starts inside a string, t if in a comment." 324 (save-excursion 325 (beginning-of-line) 326 (let ((indent-point (point)) 327 (case-fold-search nil) 328 state 329 containing-sexp 330 toplevel) 331 (if parse-start 332 (goto-char parse-start) 333 (setq toplevel (beginning-of-icon-defun))) 334 (while (< (point) indent-point) 335 (setq parse-start (point)) 336 (setq state (parse-partial-sexp (point) indent-point 0)) 337 (setq containing-sexp (car (cdr state)))) 338 (cond ((or (nth 3 state) (nth 4 state)) 339 ;; return nil or t if should not change this line 340 (nth 4 state)) 341 ((and containing-sexp 342 (/= (char-after containing-sexp) ?{)) 343 ;; line is expression, not statement: 344 ;; indent to just after the surrounding open. 345 (goto-char (1+ containing-sexp)) 346 (current-column)) 347 (t 348 (if toplevel 349 ;; Outside any procedures. 350 (progn (icon-backward-to-noncomment (point-min)) 351 (if (icon-is-continuation-line) 352 icon-continued-statement-offset 0)) 353 ;; Statement level. 354 (if (null containing-sexp) 355 (progn (beginning-of-icon-defun) 356 (setq containing-sexp (point)))) 357 (goto-char indent-point) 358 ;; Is it a continuation or a new statement? 359 ;; Find previous non-comment character. 360 (icon-backward-to-noncomment containing-sexp) 361 ;; Now we get the answer. 362 (if (icon-is-continuation-line) 363 ;; This line is continuation of preceding line's statement; 364 ;; indent icon-continued-statement-offset more than the 365 ;; first line of the statement. 366 (progn 367 (icon-backward-to-start-of-continued-exp containing-sexp) 368 (+ icon-continued-statement-offset (current-column) 369 (if (save-excursion (goto-char indent-point) 370 (skip-chars-forward " \t") 371 (eq (following-char) ?{)) 372 icon-continued-brace-offset 0))) 373 ;; This line starts a new statement. 374 ;; Position following last unclosed open. 375 (goto-char containing-sexp) 376 ;; Is line first statement after an open-brace? 377 (or 378 ;; If no, find that first statement and indent like it. 379 (save-excursion 380 (if (looking-at "procedure\\s ") 381 (forward-sexp 3) 382 (forward-char 1)) 383 (while (progn (skip-chars-forward " \t\n") 384 (looking-at "#")) 385 ;; Skip over comments following openbrace. 386 (forward-line 1)) 387 ;; The first following code counts 388 ;; if it is before the line we want to indent. 389 (and (< (point) indent-point) 390 (current-column))) 391 ;; If no previous statement, 392 ;; indent it relative to line brace is on. 393 ;; For open brace in column zero, don't let statement 394 ;; start there too. If icon-indent-level is zero, 395 ;; use icon-brace-offset + icon-continued-statement-offset 396 ;; instead. 397 ;; For open-braces not the first thing in a line, 398 ;; add in icon-brace-imaginary-offset. 399 (+ (if (and (bolp) (zerop icon-indent-level)) 400 (+ icon-brace-offset 401 icon-continued-statement-offset) 402 icon-indent-level) 403 ;; Move back over whitespace before the openbrace. 404 ;; If openbrace is not first nonwhite thing on the line, 405 ;; add the icon-brace-imaginary-offset. 406 (progn (skip-chars-backward " \t") 407 (if (bolp) 0 icon-brace-imaginary-offset)) 408 ;; Get initial indentation of the line we are on. 409 (current-indentation)))))))))) 410 411;; List of words to check for as the last thing on a line. 412;; If cdr is t, next line is a continuation of the same statement, 413;; if cdr is nil, next line starts a new (possibly indented) statement. 414 415(defconst icon-resword-alist 416 '(("by" . t) ("case" . t) ("create") ("do") ("dynamic" . t) ("else") 417 ("every" . t) ("if" . t) ("global" . t) ("initial" . t) 418 ("link" . t) ("local" . t) ("of") ("record" . t) ("repeat" . t) 419 ("static" . t) ("then") ("to" . t) ("until" . t) ("while" . t))) 420 421(defun icon-is-continuation-line () 422 (let* ((ch (preceding-char)) 423 (ch-syntax (char-syntax ch))) 424 (if (eq ch-syntax ?w) 425 (assoc (buffer-substring 426 (progn (forward-word -1) (point)) 427 (progn (forward-word 1) (point))) 428 icon-resword-alist) 429 (not (memq ch '(0 ?\; ?\} ?\{ ?\) ?\] ?\" ?\' ?\# ?\, ?\. ?\n)))))) 430 431(defun icon-backward-to-noncomment (lim) 432 (let (opoint stop) 433 (while (not stop) 434 (skip-chars-backward " \t\n\f" lim) 435 (setq opoint (point)) 436 (beginning-of-line) 437 (if (and (nth 5 (parse-partial-sexp (point) opoint)) 438 (< lim (point))) 439 (search-backward "#") 440 (setq stop t))))) 441 442(defun icon-backward-to-start-of-continued-exp (lim) 443 (if (memq (preceding-char) '(?\) ?\])) 444 (forward-sexp -1)) 445 (beginning-of-line) 446 (skip-chars-forward " \t") 447 (cond 448 ((<= (point) lim) (goto-char (1+ lim))) 449 ((not (icon-is-continued-line)) 0) 450 ((and (eq (char-syntax (following-char)) ?w) 451 (cdr 452 (assoc (buffer-substring (point) 453 (save-excursion (forward-word 1) (point))) 454 icon-resword-alist))) 0) 455 (t (end-of-line 0) (icon-backward-to-start-of-continued-exp lim)))) 456 457(defun icon-is-continued-line () 458 (save-excursion 459 (end-of-line 0) 460 (icon-is-continuation-line))) 461 462(defun icon-backward-to-start-of-if (&optional limit) 463 "Move to the start of the last \"unbalanced\" if." 464 (or limit (setq limit (save-excursion (beginning-of-icon-defun) (point)))) 465 (let ((if-level 1) 466 (case-fold-search nil)) 467 (while (not (zerop if-level)) 468 (backward-sexp 1) 469 (cond ((looking-at "else\\b") 470 (setq if-level (1+ if-level))) 471 ((looking-at "if\\b") 472 (setq if-level (1- if-level))) 473 ((< (point) limit) 474 (setq if-level 0) 475 (goto-char limit)))))) 476 477(defun mark-icon-function () 478 "Put mark at end of Icon function, point at beginning." 479 (interactive) 480 (push-mark (point)) 481 (end-of-icon-defun) 482 (push-mark (point)) 483 (beginning-of-line 0) 484 (beginning-of-icon-defun)) 485 486(defun beginning-of-icon-defun () 487 "Go to the start of the enclosing procedure; return t if at top level." 488 (interactive) 489 (if (re-search-backward "^procedure\\s \\|^end[ \t\n]" (point-min) 'move) 490 (looking-at "e") 491 t)) 492 493(defun end-of-icon-defun () 494 (interactive) 495 (if (not (bobp)) (forward-char -1)) 496 (re-search-forward "\\(\\s \\|^\\)end\\(\\s \\|$\\)" (point-max) 'move) 497 (forward-word -1) 498 (forward-line 1)) 499 500(defun indent-icon-exp () 501 "Indent each line of the Icon grouping following point." 502 (interactive) 503 (let ((indent-stack (list nil)) 504 (contain-stack (list (point))) 505 (case-fold-search nil) 506 restart outer-loop-done inner-loop-done state ostate 507 this-indent last-sexp last-depth 508 at-else at-brace at-do 509 (opoint (point)) 510 (next-depth 0)) 511 (save-excursion 512 (forward-sexp 1)) 513 (save-excursion 514 (setq outer-loop-done nil) 515 (while (and (not (eobp)) (not outer-loop-done)) 516 (setq last-depth next-depth) 517 ;; Compute how depth changes over this line 518 ;; plus enough other lines to get to one that 519 ;; does not end inside a comment or string. 520 ;; Meanwhile, do appropriate indentation on comment lines. 521 (setq inner-loop-done nil) 522 (while (and (not inner-loop-done) 523 (not (and (eobp) (setq outer-loop-done t)))) 524 (setq ostate state) 525 (setq state (parse-partial-sexp (point) (progn (end-of-line) (point)) 526 nil nil state)) 527 (setq next-depth (car state)) 528 (if (and (car (cdr (cdr state))) 529 (>= (car (cdr (cdr state))) 0)) 530 (setq last-sexp (car (cdr (cdr state))))) 531 (if (or (nth 4 ostate)) 532 (icon-indent-line)) 533 (if (or (nth 3 state)) 534 (forward-line 1) 535 (setq inner-loop-done t))) 536 (if (<= next-depth 0) 537 (setq outer-loop-done t)) 538 (if outer-loop-done 539 nil 540 (if (/= last-depth next-depth) 541 (setq last-sexp nil)) 542 (while (> last-depth next-depth) 543 (setq indent-stack (cdr indent-stack) 544 contain-stack (cdr contain-stack) 545 last-depth (1- last-depth))) 546 (while (< last-depth next-depth) 547 (setq indent-stack (cons nil indent-stack) 548 contain-stack (cons nil contain-stack) 549 last-depth (1+ last-depth))) 550 (if (null (car contain-stack)) 551 (setcar contain-stack (or (car (cdr state)) 552 (save-excursion (forward-sexp -1) 553 (point))))) 554 (forward-line 1) 555 (skip-chars-forward " \t") 556 (if (eolp) 557 nil 558 (if (and (car indent-stack) 559 (>= (car indent-stack) 0)) 560 ;; Line is on an existing nesting level. 561 ;; Lines inside parens are handled specially. 562 (if (/= (char-after (car contain-stack)) ?{) 563 (setq this-indent (car indent-stack)) 564 ;; Line is at statement level. 565 ;; Is it a new statement? Is it an else? 566 ;; Find last non-comment character before this line 567 (save-excursion 568 (setq at-else (looking-at "else\\W")) 569 (setq at-brace (= (following-char) ?{)) 570 (icon-backward-to-noncomment opoint) 571 (if (icon-is-continuation-line) 572 ;; Preceding line did not end in comma or semi; 573 ;; indent this line icon-continued-statement-offset 574 ;; more than previous. 575 (progn 576 (icon-backward-to-start-of-continued-exp (car contain-stack)) 577 (setq this-indent 578 (+ icon-continued-statement-offset (current-column) 579 (if at-brace icon-continued-brace-offset 0)))) 580 ;; Preceding line ended in comma or semi; 581 ;; use the standard indent for this level. 582 (if at-else 583 (progn (icon-backward-to-start-of-if opoint) 584 (setq this-indent (current-indentation))) 585 (setq this-indent (car indent-stack)))))) 586 ;; Just started a new nesting level. 587 ;; Compute the standard indent for this level. 588 (let ((val (calculate-icon-indent 589 (if (car indent-stack) 590 (- (car indent-stack)))))) 591 (setcar indent-stack 592 (setq this-indent val)))) 593 ;; Adjust line indentation according to its contents 594 (if (or (= (following-char) ?}) 595 (looking-at "end\\b")) 596 (setq this-indent (- this-indent icon-indent-level))) 597 (if (= (following-char) ?{) 598 (setq this-indent (+ this-indent icon-brace-offset))) 599 ;; Put chosen indentation into effect. 600 (or (= (current-column) this-indent) 601 (progn 602 (delete-region (point) (progn (beginning-of-line) (point))) 603 (indent-to this-indent))) 604 ;; Indent any comment following the text. 605 (or (looking-at comment-start-skip) 606 (if (re-search-forward comment-start-skip (save-excursion (end-of-line) (point)) t) 607 (progn (indent-for-comment) (beginning-of-line)))))))))) 608 609(defconst icon-font-lock-keywords-1 610 (eval-when-compile 611 (list 612 ;; Fontify procedure name definitions. 613 '("^[ \t]*\\(procedure\\)\\>[ \t]*\\(\\sw+\\)?" 614 (1 font-lock-builtin-face) (2 font-lock-function-name-face nil t)))) 615 "Subdued level highlighting for Icon mode.") 616 617(defconst icon-font-lock-keywords-2 618 (append 619 icon-font-lock-keywords-1 620 (eval-when-compile 621 (list 622 ;; Fontify all type specifiers. 623 (cons 624 (regexp-opt '("null" "string" "co-expression" "table" "integer" 625 "cset" "set" "real" "file" "list") 'words) 626 'font-lock-type-face) 627 ;; Fontify all keywords. 628 ;; 629 (cons 630 (regexp-opt 631 '("break" "do" "next" "repeat" "to" "by" "else" "if" "not" "return" 632 "until" "case" "of" "while" "create" "every" "suspend" "default" 633 "fail" "record" "then") 'words) 634 'font-lock-keyword-face) 635 ;; "end" "initial" 636 (cons (regexp-opt '("end" "initial") 'words) 637 'font-lock-builtin-face) 638 ;; Fontify all system variables. 639 (cons 640 (regexp-opt 641 '("&allocated" "&ascii" "&clock" "&col" "&collections" "&column" 642 "&control" "&cset" "¤t" "&date" "&dateline" "&digits" "&dump" 643 "&e" "&error" "&errornumber" "&errortext" "&errorvalue" "&errout" 644 "&eventcode" "&eventsource" "&eventvalue" "&fail" "&features" 645 "&file" "&host" "&input" "&interval" "&lcase" "&ldrag" "&letters" 646 "&level" "&line" "&lpress" "&lrelease" "&main" "&mdrag" "&meta" 647 "&mpress" "&mrelease" "&null" "&output" "&phi" "&pi" "&pos" 648 "&progname" "&random" "&rdrag" "®ions" "&resize" "&row" 649 "&rpress" "&rrelease" "&shift" "&source" "&storage" "&subject" 650 "&time" "&trace" "&ucase" "&version" "&window" "&x" "&y") t) 651 'font-lock-constant-face) 652 (cons ;; global local static declarations and link files 653 (concat 654 "^[ \t]*" 655 (regexp-opt '("global" "link" "local" "static") t) 656 "\\(\\sw+\\>\\)*") 657 '((1 font-lock-builtin-face) 658 (font-lock-match-c-style-declaration-item-and-skip-to-next 659 (goto-char (or (match-beginning 2) (match-end 1))) nil 660 (1 (if (match-beginning 2) 661 font-lock-function-name-face 662 font-lock-variable-name-face))))) 663 664 (cons ;; $define $elif $ifdef $ifndef $undef 665 (concat "^" 666 (regexp-opt'("$define" "$elif" "$ifdef" "$ifndef" "$undef") t) 667 "\\>[ \t]*\\([^ \t\n]+\\)?") 668 '((1 font-lock-builtin-face) 669 (4 font-lock-variable-name-face nil t))) 670 (cons ;; $dump $endif $else $include 671 (concat 672 "^" (regexp-opt'("$dump" "$endif" "$else" "$include") t) "\\>" ) 673 'font-lock-builtin-face) 674 (cons ;; $warning $error 675 (concat "^" (regexp-opt '("$warning" "$error") t) 676 "\\>[ \t]*\\(.+\\)?") 677 '((1 font-lock-builtin-face) (3 font-lock-warning-face nil t)))))) 678 "Gaudy level highlighting for Icon mode.") 679 680(defvar icon-font-lock-keywords icon-font-lock-keywords-1 681 "Default expressions to highlight in `icon-mode'.") 682 683;;;used by hs-minor-mode 684(defun icon-forward-sexp-function (arg) 685 (if (< arg 0) 686 (beginning-of-icon-defun) 687 (end-of-icon-defun) 688 (forward-char -1))) 689 690(provide 'icon) 691 692;;; arch-tag: 8abf8c99-e7df-44af-a58f-ef5ed2ee52cb 693;;; icon.el ends here 694