lisp/progmodes/simula.el

   1 ;;; simula.el --- SIMULA 87 code editing commands for Emacs
   2
   3 ;; Copyright (C) 1992, 1994, 1996, 2001, 2002, 2003, 2004, 2005, 2006,
   4 ;;   2007, 2008, 2009, 2010  Free Software Foundation, Inc.
   5
   6 ;; Author: Hans Henrik Eriksen <hhe@ifi.uio.no>
   7 ;; Maintainer: simula-mode@ifi.uio.no
   8 ;;   (above email addresses invalid as of April 2008)
   9 ;; Adapted-By: ESR
  10 ;; Keywords: languages
  11
  12 ;; This file is part of GNU Emacs.
  13
  14 ;; GNU Emacs is free software: you can redistribute it and/or modify
  15 ;; it under the terms of the GNU General Public License as published by
  16 ;; the Free Software Foundation, either version 3 of the License, or
  17 ;; (at your option) any later version.
  18
  19 ;; GNU Emacs is distributed in the hope that it will be useful,
  20 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22 ;; GNU General Public License for more details.
  23
  24 ;; You should have received a copy of the GNU General Public License
  25 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  26
  27 ;;; Commentary:
  28
  29 ;; A major mode for editing the Simula language.  It knows about Simula
  30 ;; syntax and standard indentation commands.  It also provides convenient
  31 ;; abbrevs for Simula keywords.
  32 ;;
  33 ;; Hans Henrik Eriksen (the author) may be reached at:
  34 ;;         Institutt for informatikk,
  35 ;;         Universitetet i Oslo
  36
  37 ;;; Code:
  38
  39 \f
  40 (defgroup simula nil
  41   "Major mode for editing Simula code."
  42   :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
  43   :prefix "simula-"
  44   :group 'languages)
  45
  46 (defconst simula-tab-always-indent-default nil
  47   "Non-nil means TAB in SIMULA mode should always reindent the current line.
  48 Otherwise TAB indents only when point is within
  49 the run of whitespace at the beginning of the line.")
  50
  51 (defcustom simula-tab-always-indent simula-tab-always-indent-default
  52   "*Non-nil means TAB in SIMULA mode should always reindent the current line.
  53 Otherwise TAB indents only when point is within
  54 the run of whitespace at the beginning of the line."
  55   :type 'boolean
  56   :group 'simula)
  57
  58 (defconst simula-indent-level-default 3
  59   "Indentation of SIMULA statements with respect to containing block.")
  60
  61 (defcustom simula-indent-level simula-indent-level-default
  62   "*Indentation of SIMULA statements with respect to containing block."
  63   :type 'integer
  64   :group 'simula)
  65
  66
  67 (defconst simula-substatement-offset-default 3
  68   "Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE.")
  69
  70 (defcustom simula-substatement-offset simula-substatement-offset-default
  71   "*Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE."
  72   :type 'integer
  73   :group 'simula)
  74
  75 (defconst simula-continued-statement-offset-default 3
  76   "Extra indentation for lines not starting a statement or substatement.
  77 If value is a list, each line in a multipleline continued statement
  78 will have the car of the list extra indentation with respect to
  79 the previous line of the statement.")
  80
  81 (defcustom simula-continued-statement-offset
  82   simula-continued-statement-offset-default
  83   "*Extra indentation for lines not starting a statement or substatement.
  84 If value is a list, each line in a multipleline continued statement
  85 will have the car of the list extra indentation with respect to
  86 the previous line of the statement."
  87   :type 'integer
  88   :group 'simula)
  89
  90 (defconst simula-label-offset-default -4711
  91   "Offset of SIMULA label lines relative to usual indentation.")
  92
  93 (defcustom simula-label-offset simula-label-offset-default
  94   "*Offset of SIMULA label lines relative to usual indentation."
  95   :type 'integer
  96   :group 'simula)
  97
  98 (defconst simula-if-indent-default '(0 . 0)
  99   "Extra indentation of THEN and ELSE with respect to the starting IF.
 100 Value is a cons cell, the car is extra THEN indentation and the cdr
 101 extra ELSE indentation.  IF after ELSE is indented as the starting IF.")
 102
 103 (defcustom simula-if-indent simula-if-indent-default
 104   "*Extra indentation of THEN and ELSE with respect to the starting IF.
 105 Value is a cons cell, the car is extra THEN indentation and the cdr
 106 extra ELSE indentation.  IF after ELSE is indented as the starting IF."
 107   :type '(cons integer integer)
 108   :group 'simula)
 109
 110 (defconst simula-inspect-indent-default '(0 . 0)
 111   "Extra indentation of WHEN and OTHERWISE with respect to the INSPECT.
 112 Value is a cons cell, the car is extra WHEN indentation
 113 and the cdr extra OTHERWISE indentation.")
 114
 115 (defcustom simula-inspect-indent simula-inspect-indent-default
 116   "*Extra indentation of WHEN and OTHERWISE with respect to the INSPECT.
 117 Value is a cons cell, the car is extra WHEN indentation
 118 and the cdr extra OTHERWISE indentation."
 119   :type '(cons integer integer)
 120   :group 'simula)
 121
 122 (defconst simula-electric-indent-default nil
 123   "Non-nil means `simula-indent-line' function may reindent previous line.")
 124
 125 (defcustom simula-electric-indent simula-electric-indent-default
 126   "*Non-nil means `simula-indent-line' function may reindent previous line."
 127   :type 'boolean
 128   :group 'simula)
 129
 130 (defconst simula-abbrev-keyword-default 'upcase
 131   "Specify how to convert case for SIMULA keywords.
 132 Value is one of the symbols `upcase', `downcase', `capitalize',
 133 \(as in) `abbrev-table' or nil if they should not be changed.")
 134
 135 (defcustom simula-abbrev-keyword simula-abbrev-keyword-default
 136   "*Specify how to convert case for SIMULA keywords.
 137 Value is one of the symbols `upcase', `downcase', `capitalize',
 138 \(as in) `abbrev-table' or nil if they should not be changed."
 139   :type '(choice (const upcase) (const downcase) (const capitalize)(const nil))
 140   :group 'simula)
 141
 142 (defconst simula-abbrev-stdproc-default 'abbrev-table
 143   "Specify how to convert case for standard SIMULA procedure and class names.
 144 Value is one of the symbols `upcase', `downcase', `capitalize',
 145 \(as in) `abbrev-table', or nil if they should not be changed.")
 146
 147 (defcustom simula-abbrev-stdproc simula-abbrev-stdproc-default
 148   "*Specify how to convert case for standard SIMULA procedure and class names.
 149 Value is one of the symbols `upcase', `downcase', `capitalize',
 150 \(as in) `abbrev-table', or nil if they should not be changed."
 151   :type '(choice (const upcase) (const downcase) (const capitalize)
 152           (const abbrev-table) (const nil))
 153   :group 'simula)
 154
 155 (defcustom simula-abbrev-file nil
 156   "*File with extra abbrev definitions for use in SIMULA mode.
 157 These are used together with the standard abbrev definitions for SIMULA.
 158 Please note that the standard definitions are required
 159 for SIMULA mode to function correctly."
 160   :type '(choice file (const nil))
 161   :group 'simula)
 162
 163 (defvar simula-mode-syntax-table nil
 164   "Syntax table in SIMULA mode buffers.")
 165
 166 (defconst simula-font-lock-syntactic-keywords
 167   `(;; `comment' directive.
 168     ("\\<\\(c\\)omment\\>" 1 "<")
 169     ;; end comments
 170     (,(concat "\\<end\\>\\([^;\n]\\).*?\\(\n\\|\\(.\\)\\(;\\|"
 171               (regexp-opt '("end" "else" "when" "otherwise"))
 172               "\\)\\)")
 173      (1 "< b")
 174      (3 "> b" nil t))
 175     ;; non-quoted single-quote char.
 176     ("'\\('\\)'" 1 ".")))
 177
 178 ;; Regexps written with help from Alf-Ivar Holm <alfh@ifi.uio.no>.
 179 (defconst simula-font-lock-keywords-1
 180   '(;;
 181     ;; Compiler directives.
 182     ("^%\\([^ \t\n].*\\)" 1 font-lock-constant-face t)
 183     ;;
 184     ;; Class and procedure names.
 185     ("\\<\\(class\\|procedure\\)\\>[ \t]*\\(\\sw+\\)?"
 186      (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t)))
 187   "Subdued level highlighting for Simula mode.")
 188
 189 (defconst simula-font-lock-keywords-2
 190   (append simula-font-lock-keywords-1
 191    (list
 192     ;;
 193     ;; Constants.
 194     '("\\<\\(false\\|none\\|notext\\|true\\)\\>" . font-lock-constant-face)
 195     ;;
 196     ;; Keywords.
 197     (regexp-opt
 198      '("activate" "after" "and" "at" "before" "begin" "delay" "do"
 199        "else" "end" "eq" "eqv" "external" "for" "ge" "go" "goto" "gt"
 200        "hidden" "if" "imp" "in" "inner" "inspect" "is" "label" "le"
 201        "lt" "ne" "new" "not" "or" "otherwise" "prior" "protected"
 202        "qua" "reactivate" "step" "switch" "then" "this" "to" "until"
 203        "virtual" "when" "while") 'words)
 204     ;;
 205     ;; Types.
 206     (cons (regexp-opt
 207            '("array" "boolean" "character" "integer"
 208              "long" "name" "real" "short" "text" "value" "ref") 'words)
 209           'font-lock-type-face)))
 210   "Medium level highlighting for Simula mode.")
 211
 212 (defconst simula-font-lock-keywords-3
 213   (append simula-font-lock-keywords-2
 214    (list
 215     ;;
 216     ;; Super-class names and super-slow.
 217     '("\\<\\(\\sw+\\)[ \t]+class\\>" 1 font-lock-function-name-face)
 218     ;;
 219     ;; Types and their declarations.
 220     (list (concat "\\<\\(array\\|boolean\\|character\\|integer\\|"
 221                   "long\\|name\\|real\\|short\\|text\\|value\\)\\>"
 222                   "\\([ \t]+\\sw+\\>\\)*")
 223           '(font-lock-match-c-style-declaration-item-and-skip-to-next
 224             ;; Start with point after all type specifiers.
 225             (goto-char (or (match-beginning 2) (match-end 1)))
 226             ;; Finish with point after first type specifier.
 227             (goto-char (match-end 1))
 228             ;; Fontify as a variable name.
 229             (1 font-lock-variable-name-face)))
 230     ;;
 231     ;; Object references and their declarations.
 232     '("\\<\\(ref\\)\\>[ \t]*\\((\\(\\sw+\\))\\)?"
 233       (3 font-lock-function-name-face nil t)
 234       (font-lock-match-c-style-declaration-item-and-skip-to-next nil nil
 235        (1 font-lock-variable-name-face)))
 236     ))
 237   "Gaudy level highlighting for Simula mode.")
 238
 239 (defvar simula-font-lock-keywords simula-font-lock-keywords-1
 240   "Default expressions to highlight in Simula mode.")
 241
 242 ; The following function is taken from cc-mode.el,
 243 ; it determines the flavor of the Emacs running
 244
 245 (defvar simula-mode-menu
 246   '(["Report Bug"             simula-submit-bug-report t]
 247     ["Indent Line"            simula-indent-line t]
 248     ["Backward Statement"     simula-previous-statement t]
 249     ["Forward Statement"      simula-next-statement t]
 250     ["Backward Up Level"      simula-backward-up-level t]
 251     ["Forward Down Statement" simula-forward-down-level t])
 252   "Lucid Emacs menu for SIMULA mode.")
 253
 254 (if simula-mode-syntax-table
 255     ()
 256   (setq simula-mode-syntax-table (copy-syntax-table (standard-syntax-table)))
 257   (modify-syntax-entry ?!  "<"    simula-mode-syntax-table)
 258   (modify-syntax-entry ?$  "."    simula-mode-syntax-table)
 259   (modify-syntax-entry ?%  "< b"  simula-mode-syntax-table)
 260   (modify-syntax-entry ?\n "> b"  simula-mode-syntax-table)
 261   (modify-syntax-entry ?'  "\""   simula-mode-syntax-table)
 262   (modify-syntax-entry ?\( "()"   simula-mode-syntax-table)
 263   (modify-syntax-entry ?\) ")("   simula-mode-syntax-table)
 264   (modify-syntax-entry ?\; ">"    simula-mode-syntax-table)
 265   (modify-syntax-entry ?\[ "."    simula-mode-syntax-table)
 266   (modify-syntax-entry ?\\ "."    simula-mode-syntax-table)
 267   (modify-syntax-entry ?\] "."    simula-mode-syntax-table)
 268   (modify-syntax-entry ?_  "_"    simula-mode-syntax-table)
 269   (modify-syntax-entry ?\| "."    simula-mode-syntax-table)
 270   (modify-syntax-entry ?\{ "."    simula-mode-syntax-table)
 271   (modify-syntax-entry ?\} "."    simula-mode-syntax-table))
 272
 273 (defvar simula-mode-map
 274   (let ((map (make-sparse-keymap)))
 275     (define-key map "\C-c\C-u"   'simula-backward-up-level)
 276     (define-key map "\C-c\C-p"   'simula-previous-statement)
 277     (define-key map "\C-c\C-d"   'simula-forward-down-level)
 278     (define-key map "\C-c\C-n"   'simula-next-statement)
 279     ;; (define-key map "\C-c\C-g"   'simula-goto-definition)
 280     ;; (define-key map "\C-c\C-h"   'simula-standard-help)
 281     (define-key map "\177"       'backward-delete-char-untabify)
 282     (define-key map ":"          'simula-electric-label)
 283     (define-key map "\e\C-q"     'simula-indent-exp)
 284     (define-key map "\t"         'simula-indent-command)
 285     ;; Emacs 19 defines menus in the mode map
 286     (define-key map [menu-bar simula]
 287       (cons "SIMULA" (make-sparse-keymap "SIMULA")))
 288     (define-key map [menu-bar simula bug-report]
 289       '("Submit Bug Report" . simula-submit-bug-report))
 290     (define-key map [menu-bar simula separator-indent]
 291       '("--"))
 292     (define-key map [menu-bar simula indent-exp]
 293       '("Indent Expression" . simula-indent-exp))
 294     (define-key map [menu-bar simula indent-line]
 295       '("Indent Line" . simula-indent-command))
 296     (define-key map [menu-bar simula separator-navigate]
 297       '("--"))
 298     (define-key map [menu-bar simula backward-stmt]
 299       '("Previous Statement" . simula-previous-statement))
 300     (define-key map [menu-bar simula forward-stmt]
 301       '("Next Statement" . simula-next-statement))
 302     (define-key map [menu-bar simula backward-up]
 303       '("Backward Up Level" . simula-backward-up-level))
 304     (define-key map [menu-bar simula forward-down]
 305       '("Forward Down Statement" . simula-forward-down-level))
 306
 307     (put 'simula-next-statement 'menu-enable '(not (eobp)))
 308     (put 'simula-previous-statement 'menu-enable '(not (bobp)))
 309     (put 'simula-forward-down-level 'menu-enable '(not (eobp)))
 310     (put 'simula-backward-up-level 'menu-enable '(not (bobp)))
 311     (put 'simula-indent-command 'menu-enable '(not buffer-read-only))
 312     (put 'simula-indent-exp 'menu-enable '(not buffer-read-only))
 313
 314     ;; RMS: mouse-3 should not select this menu.  mouse-3's global
 315     ;; definition is useful in SIMULA mode and we should not interfere
 316     ;; with that.  The menu is mainly for beginners, and for them,
 317     ;; the menubar requires less memory than a special click.
 318     ;; in Lucid Emacs, we want the menu to popup when the 3rd button is
 319     ;; hit.  In 19.10 and beyond this is done automatically if we put
 320     ;; the menu on mode-popup-menu variable, see c-common-init [cc-mode.el]
 321     ;;(if (not (boundp 'mode-popup-menu))
 322     ;;  (define-key simula-mode-map 'button3 'simula-popup-menu))
 323     map)
 324   "Keymap used in `simula-mode'.")
 325
 326 ;; menus for Lucid
 327 (defun simula-popup-menu (e)
 328   "Pops up the SIMULA menu."
 329   (interactive "@e")
 330   (popup-menu (cons (concat mode-name " Mode Commands") simula-mode-menu)))
 331
 332 ;;;###autoload
 333 (define-derived-mode simula-mode nil "Simula"
 334   "Major mode for editing SIMULA code.
 335 \\{simula-mode-map}
 336 Variables controlling indentation style:
 337  `simula-tab-always-indent'
 338     Non-nil means TAB in SIMULA mode should always reindent the current line,
 339     regardless of where in the line point is when the TAB command is used.
 340  `simula-indent-level'
 341     Indentation of SIMULA statements with respect to containing block.
 342  `simula-substatement-offset'
 343     Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE.
 344  `simula-continued-statement-offset' 3
 345     Extra indentation for lines not starting a statement or substatement,
 346     e.g. a nested FOR-loop.  If value is a list, each line in a multiple-
 347     line continued statement will have the car of the list extra indentation
 348     with respect to the previous line of the statement.
 349  `simula-label-offset' -4711
 350     Offset of SIMULA label lines relative to usual indentation.
 351  `simula-if-indent' '(0 . 0)
 352     Extra indentation of THEN and ELSE with respect to the starting IF.
 353     Value is a cons cell, the car is extra THEN indentation and the cdr
 354     extra ELSE indentation.  IF after ELSE is indented as the starting IF.
 355  `simula-inspect-indent' '(0 . 0)
 356     Extra indentation of WHEN and OTHERWISE with respect to the
 357     corresponding INSPECT.  Value is a cons cell, the car is
 358     extra WHEN indentation and the cdr extra OTHERWISE indentation.
 359  `simula-electric-indent' nil
 360     If this variable is non-nil, `simula-indent-line'
 361     will check the previous line to see if it has to be reindented.
 362  `simula-abbrev-keyword' 'upcase
 363     Determine how SIMULA keywords will be expanded.  Value is one of
 364     the symbols `upcase', `downcase', `capitalize', (as in) `abbrev-table',
 365     or nil if they should not be changed.
 366  `simula-abbrev-stdproc' 'abbrev-table
 367     Determine how standard SIMULA procedure and class names will be
 368     expanded.  Value is one of the symbols `upcase', `downcase', `capitalize',
 369     (as in) `abbrev-table', or nil if they should not be changed.
 370
 371 Turning on SIMULA mode calls the value of the variable simula-mode-hook
 372 with no arguments, if that value is non-nil."
 373   (make-local-variable 'comment-column)
 374   (setq comment-column 40)
 375 ;  (make-local-variable 'end-comment-column)
 376 ;  (setq end-comment-column 75)
 377   (make-local-variable 'paragraph-start)
 378   (setq paragraph-start "[ \t]*$\\|\\f")
 379   (make-local-variable 'paragraph-separate)
 380   (setq paragraph-separate paragraph-start)
 381   (make-local-variable 'indent-line-function)
 382   (setq indent-line-function 'simula-indent-line)
 383   (make-local-variable 'require-final-newline)
 384   (setq require-final-newline mode-require-final-newline)
 385   (make-local-variable 'comment-start)
 386   (setq comment-start "! ")
 387   (make-local-variable 'comment-end)
 388   (setq comment-end " ;")
 389   (make-local-variable 'comment-start-skip)
 390   (setq comment-start-skip "!+ *")
 391   (make-local-variable 'parse-sexp-ignore-comments)
 392   (setq parse-sexp-ignore-comments nil)
 393   (make-local-variable 'comment-multi-line)
 394   (setq comment-multi-line t)
 395   (make-local-variable 'font-lock-defaults)
 396   (setq font-lock-defaults
 397         '((simula-font-lock-keywords simula-font-lock-keywords-1
 398            simula-font-lock-keywords-2 simula-font-lock-keywords-3)
 399           nil t ((?_ . "w")) nil
 400           (font-lock-syntactic-keywords . simula-font-lock-syntactic-keywords)))
 401   (abbrev-mode 1))
 402
 403 (defun simula-indent-exp ()
 404   "Indent SIMULA expression following point."
 405   (interactive)
 406   (let ((here (point))
 407         (simula-electric-indent nil)
 408         end)
 409     (simula-skip-comment-forward)
 410     (if (eobp)
 411         (goto-char here)
 412       (unwind-protect
 413           (progn
 414             (simula-next-statement 1)
 415             (setq end (point-marker))
 416             (simula-previous-statement 1)
 417             (beginning-of-line)
 418             (while (< (point) end)
 419               (if (not (looking-at "[ \t]*$"))
 420                   (simula-indent-line))
 421               (forward-line 1)))
 422         (and end (set-marker end nil))))))
 423
 424
 425 (defun simula-indent-line ()
 426   "Indent this line as SIMULA code.
 427 If `simula-electric-indent' is non-nil, indent previous line if necessary."
 428   (let ((origin (- (point-max) (point)))
 429         (indent (simula-calculate-indent))
 430         (case-fold-search t))
 431     (unwind-protect
 432         (if simula-electric-indent
 433             (progn
 434               ;;
 435               ;; manually expand abbrev on last line, if any
 436               ;;
 437               (end-of-line 0)
 438               (expand-abbrev)
 439               ;; now maybe we should reindent that line
 440               (beginning-of-line)
 441               (skip-chars-forward " \t\f")
 442               (if (and
 443                    (looking-at
 444                     "\\(end\\|if\\|then\\|else\\|when\\|otherwise\\)\\>")
 445                    (not (simula-context)))
 446                   ;; yes - reindent
 447                   (let ((post-indent (simula-calculate-indent)))
 448                     (if (eq (current-indentation) post-indent)
 449                         ()
 450                       (delete-horizontal-space)
 451                       (indent-to post-indent))))))
 452       (goto-char (- (point-max) origin))
 453       (if (eq (current-indentation) indent)
 454           (back-to-indentation)
 455         (delete-horizontal-space)
 456         (indent-to indent)))))
 457
 458
 459 (defun simula-indent-command (&optional whole-exp)
 460   "Indent current line as SIMULA code, or insert TAB character.
 461 If `simula-tab-always-indent' is non-nil, always indent current line.
 462 Otherwise, indent only if point is before any non-whitespace
 463 character on the line.
 464
 465 A numeric argument, regardless of its value, means indent rigidly
 466 all the lines of the SIMULA statement after point so that this line
 467 becomes properly indented.
 468 The relative indentation among the lines of the statement are preserved."
 469   (interactive "P")
 470   (let ((case-fold-search t))
 471     (if (or whole-exp simula-tab-always-indent
 472             (save-excursion
 473               (skip-chars-backward " \t\f")
 474               (bolp)))
 475         ;; reindent current line
 476         (let ((indent (save-excursion
 477                         (beginning-of-line)
 478                         (simula-calculate-indent)))
 479               (current (current-indentation))
 480               (origin (- (point-max) (point)))
 481               (bol (save-excursion
 482                      (skip-chars-backward " \t\f")
 483                      (bolp)))
 484               beg end)
 485           (unwind-protect
 486               (if (eq current indent)
 487                   (if (save-excursion
 488                         (skip-chars-backward " \t\f")
 489                         (bolp))
 490                       (back-to-indentation))
 491                 (beginning-of-line)
 492                 (delete-horizontal-space)
 493                 (indent-to indent))
 494             (if (not bol)
 495                 (goto-char (- (point-max) origin))))
 496           (setq origin (point))
 497           (if whole-exp
 498               (save-excursion
 499                 (beginning-of-line 2)
 500                 (setq beg (point))
 501                 (goto-char origin)
 502                 (simula-next-statement 1)
 503                 (setq end (point))
 504                 (if (and (> end beg) (not (eq indent current)))
 505                     (indent-code-rigidly beg end (- indent current) "%")))))
 506       (insert-tab))))
 507
 508
 509 (defun simula-context ()
 510   "Return value according to syntactic SIMULA context of point.
 511     0    point inside COMMENT comment
 512     1    point on SIMULA-compiler directive line
 513     2    point inside END comment
 514     3    point inside string
 515     4    point inside character constant
 516   nil    otherwise."
 517   ;; first, find out if this is a compiler directive line
 518   (if (save-excursion
 519         (beginning-of-line)
 520         (eq (following-char) ?%))
 521       ;; YES - return 1
 522       1
 523     (save-excursion
 524       ;; The current line is NOT a compiler directive line.
 525       ;; Now, the strategy is to search backward to find a semicolon
 526       ;; that is NOT inside a string. The point after semicolon MUST be
 527       ;; outside a comment, since semicolons are comment-ending and
 528       ;; comments are non-recursive. We take advantage of the fact
 529       ;; that strings MUST end on the same line as they started, so
 530       ;; that we can easily decide whether we are inside a string or not.
 531       (let (return-value (origin (point)))
 532         (skip-chars-backward "^;" (point-min))
 533         ;; found semicolon or beginning of buffer
 534         (let (loopvalue (saved-point origin))
 535           (while (and (not (bobp))
 536                       (if (progn
 537                             (beginning-of-line)
 538                             ;; compiler directive line? If so, cont searching..
 539                             (eq (following-char) ?%))
 540                           t
 541                         (while (< (point) saved-point)
 542                           (skip-chars-forward "^;\"'")
 543                           (forward-char 1)
 544                           (cond
 545                            ((eq (preceding-char) ?\;)
 546                             (setq saved-point (point)))
 547                            ((eq (preceding-char) ?\")
 548                             (skip-chars-forward "^\";")
 549                             (if (eq (following-char) ?\;)
 550                                 (setq saved-point (point) loopvalue t)
 551                               (forward-char 1)))
 552                            (t
 553                             (if (eq (following-char) ?')
 554                                 (forward-char 1))
 555                             (skip-chars-forward "^';")
 556                             (if (eq (following-char) ?\;)
 557                                 (setq saved-point (point) loopvalue t)
 558                               (forward-char 1)))))
 559                         loopvalue))
 560             (backward-char 1)
 561             (skip-chars-backward "^;")
 562             (setq saved-point (point) loopvalue nil)))
 563         ;; Now we are CERTAIN that we are outside comments and strings.
 564         ;; The job now is to search forward again towards the origin
 565         ;; skipping directives, comments and strings correctly,
 566         ;; so that we know what context we are in when we find the origin.
 567         (while (and
 568                 (< (point) origin)
 569                 (re-search-forward
 570                  "\\<end\\>\\|!\\|\"\\|'\\|^%\\|\\<comment\\>" origin 'move))
 571           (cond
 572            ((memq (preceding-char) '(?d ?D))
 573             (setq return-value 2)
 574             (while (and (re-search-forward
 575                          ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>\\|^%"
 576                          origin 'move)
 577                         ;; found another END?
 578                         (or (memq (preceding-char) '(?d ?D))
 579                             ;; if directive, skip line
 580                             (and (eq (preceding-char) ?%)
 581                                  (beginning-of-line 2))
 582                             ;; found other keyword, out of END comment
 583                             (setq return-value nil))))
 584             (if (and (eq (char-syntax (preceding-char)) ?w)
 585                      (eq (char-syntax (following-char)) ?w))
 586                 (save-excursion
 587                   (backward-word 1)
 588                   (if (looking-at "end\\>\\|else\\>\\|otherwise\\>\\|when\\>")
 589                       (setq return-value nil)))))
 590            ((memq (preceding-char) '(?! ?t ?T))
 591             ; skip comment
 592             (setq return-value 0)
 593             (skip-chars-forward "^%;" origin)
 594             (while (and return-value (< (point) origin))
 595               (if (eq (following-char) ?\;)
 596                   (setq return-value nil)
 597                 (if (bolp)
 598                     (beginning-of-line 2)       ; skip directive inside comment
 599                   (forward-char 1))             ; or single '%'
 600                 (skip-chars-forward "^%;" origin))))
 601            ((eq (preceding-char) ?\")
 602             (if (not (search-forward "\"" origin 'move))
 603                 (setq return-value 3)))
 604            ((eq (preceding-char) ?\')
 605             (if (or (eq (point) origin) (eobp))
 606                 (setq return-value 4)
 607               (forward-char 1)
 608               (if (not (search-forward "'" origin 'move))
 609                   (setq return-value 4))))
 610            ;; compiler directive line - skip
 611            (t (beginning-of-line 2))))
 612         return-value)
 613       )))
 614
 615
 616 (defun simula-electric-label ()
 617   "If this is a label that starts the line, reindent the line."
 618   (interactive)
 619   (expand-abbrev)
 620   (insert ?:)
 621   (let ((origin (- (point-max) (point)))
 622         (case-fold-search t)
 623         ;; don't mix a label with an assignment operator := :-
 624         ;; therefore take a peek at next typed character...
 625         (next-char (read-event)))
 626     (unwind-protect
 627         (setq unread-command-events (append unread-command-events
 628                                             (list next-char)))
 629         ;; Problem: find out if character just read is a command char
 630         ;; that would insert something after ':' making it a label.
 631         ;; At least \n, \r (and maybe \t) falls into this category.
 632         ;; This is a real crock, it depends on traditional keymap
 633         ;; bindings, that is, printing characters doing self-insert,
 634         ;; and no other command sequence inserting '-' or '='.
 635         ;; simula-electric-label can be easily fooled...
 636         (if (and (not (memq next-char '(?= ?-)))
 637                  (or (memq next-char '(?\n ?\r))
 638                      (and (eq next-char ?\t)
 639                           simula-tab-always-indent)
 640                      (not (memq (following-char) '(?= ?-))))
 641                  (not (simula-context))
 642                  ;; label?
 643                  (progn
 644                    (backward-char 1)
 645                    (skip-chars-backward " \t\f")
 646                    (skip-chars-backward "a-zA-Z0-9_")
 647                    (if (looking-at "virtual\\>")
 648                        nil
 649                      (skip-chars-backward " \t\f")
 650                      (bolp))))
 651             (let ((amount (simula-calculate-indent)))
 652               (delete-horizontal-space)
 653               (indent-to amount)))
 654       (goto-char (- (point-max) origin)))))
 655
 656
 657 (defun simula-backward-up-level (count)
 658   "Move backward up COUNT block levels.
 659 If COUNT is negative, move forward up block level instead."
 660   (interactive "p")
 661   (let ((origin (point))
 662         (case-fold-search t))
 663     (condition-case ()
 664         (if (> count 0)
 665             (while (> count 0)
 666               (re-search-backward "\\<begin\\>\\|\\<end\\>")
 667               (if (not (simula-context))
 668                   (setq count (if (memq (following-char) '(?b ?B))
 669                                   (1- count)
 670                                 (1+ count)))))
 671           (while (< count 0)
 672             (re-search-forward "\\<begin\\>\\|\\<end\\>")
 673             (backward-word 1)
 674             (if (not (simula-context))
 675                 (setq count (if (memq (following-char) '(?e ?E))
 676                                 (1+ count)
 677                               (1- count))))
 678             (backward-word -1)))
 679       ;; If block level not found, jump back to origin and signal an error
 680       (error (progn
 681                (goto-char origin)
 682                (error "No higher block level")))
 683       (quit (progn
 684               (goto-char origin)
 685               (signal 'quit nil))))))
 686
 687
 688 (defun simula-forward-down-level (count)
 689   "Move forward down COUNT block levels.
 690 If COUNT is negative, move backward down block level instead."
 691   (interactive "p")
 692   ;; When we search for a deeper block level, we must never
 693   ;; get out of the block where we started -> count >= start-count
 694   (let ((start-count count)
 695         (origin (point))
 696         (case-fold-search t))
 697     (condition-case ()
 698         (if (< count 0)
 699             (while (< count 0)
 700               (re-search-backward "\\<begin\\>\\|\\<end\\>")
 701               (if (not (simula-context))
 702                   (setq count (if (memq (following-char) '(?e ?E))
 703                                   (1+ count)
 704                                 (1- count))))
 705               (if (< count start-count) (signal 'error nil)))
 706           (while (> count 0)
 707             (re-search-forward "\\<begin\\>\\|\\<end\\>")
 708             (backward-word 1)
 709             (if (not (simula-context))
 710                 (setq count (if (memq (following-char) '(?b ?B))
 711                                 (1- count)
 712                               (1+ count))))
 713             (backward-word -1)
 714             ;; deeper level has to be found within starting block
 715             (if (> count start-count) (signal 'error nil))))
 716       ;; If block level not found, jump back to origin and signal an error
 717       (error (progn
 718                (goto-char origin)
 719                (error "No containing block level")))
 720       (quit (progn
 721               (goto-char origin)
 722               (signal 'quit nil))))))
 723
 724
 725 (defun simula-previous-statement (count)
 726   "Move backward COUNT statements.
 727 If COUNT is negative, move forward instead."
 728   (interactive "p")
 729   (if (< count 0)
 730       (simula-next-statement (- count))
 731     (let (status
 732           (case-fold-search t)
 733           (origin (point)))
 734       (condition-case ()
 735           ;;
 736           (progn
 737             (simula-skip-comment-backward)
 738             (if (memq (preceding-char) '(?n ?N))
 739                 (progn
 740                   (backward-word 1)
 741                   (if (not (looking-at "\\<begin\\>"))
 742                       (backward-word -1)))
 743               (if (eq (preceding-char) ?\;)
 744                   (backward-char 1))
 745               )
 746             (while (and (natnump (setq count (1- count)))
 747                         (setq status (simula-search-backward
 748                                       ";\\|\\<begin\\>" nil 'move))))
 749             (if status
 750                 (progn
 751                   (if (eq (following-char) ?\;)
 752                       (forward-char 1)
 753                     (backward-word -1))))
 754             (simula-skip-comment-forward))
 755         (error (progn (goto-char origin)
 756                       (error "Incomplete statement (too many ENDs)")))
 757         (quit (progn (goto-char origin) (signal 'quit nil)))))))
 758
 759
 760 (defun simula-next-statement (count)
 761   "Move forward COUNT statements.
 762 If COUNT is negative, move backward instead."
 763   (interactive "p")
 764   (if (< count 0)
 765       (simula-previous-statement (- count))
 766     (let (status
 767           (case-fold-search t)
 768           (origin (point)))
 769       (condition-case ()
 770           (progn
 771             (simula-skip-comment-forward)
 772             (if (looking-at "\\<end\\>") (forward-word 1))
 773             (while (and (natnump (setq count (1- count)))
 774                         (setq status (simula-search-forward
 775                                       ";\\|\\<end\\>" (point-max) 'move))))
 776             (if (and status (/= (preceding-char) ?\;))
 777                 (progn
 778                   (backward-word 1)
 779                   (simula-skip-comment-backward))))
 780         (error (progn (goto-char origin)
 781                       (error "Incomplete statement (too few ENDs)")))
 782         (quit (progn (goto-char origin) (signal 'quit nil)))))))
 783
 784
 785 (defun simula-skip-comment-backward (&optional stop-at-end)
 786   "Search towards bob to find first char that is outside a comment."
 787   (interactive)
 788   (catch 'simula-out
 789     (let (context)
 790       (while t
 791         (skip-chars-backward " \t\n\f")
 792         (if (eq (preceding-char) ?\;)
 793             (save-excursion
 794               (backward-char 1)
 795               (setq context (simula-context))
 796               (if (and stop-at-end (eq context 2))
 797                   (setq context nil)))
 798           (setq context (simula-context)))
 799         (cond
 800          ((memq context '(nil 3 4))
 801           ;; check to see if we found a label
 802           (if (and (eq (preceding-char) ?:)
 803                    (not (memq (following-char) '(?- ?=)))
 804                    (save-excursion
 805                      (skip-chars-backward ": \t\fa-zA-Z0-9_")
 806                      (not (looking-at "virtual\\>"))))
 807               (skip-chars-backward ": \t\fa-zA-Z0-9_")
 808             (throw 'simula-out nil)))
 809          ((eq context 0)
 810           ;; since we are inside a comment, it must start somewhere!
 811           (while (and (re-search-backward "!\\|\\<comment\\>")
 812                       (memq (simula-context) '(0 1)))))
 813          ((eq context 1)
 814           (beginning-of-line)
 815           (if (bobp)
 816               (throw 'simula-out nil)
 817             (backward-char)))
 818          ((eq context 2)
 819           ;; an END-comment must belong to an END
 820           (re-search-backward "\\<end\\>")
 821           (forward-word 1)
 822           (throw 'simula-out nil))
 823          ;; should be impossible to get here..
 824          )))))
 825
 826
 827 (defun simula-skip-comment-forward ()
 828   "Search towards eob to find first char that is outside a comment."
 829   ;; this function assumes we start with point .outside a comment
 830   (interactive)
 831   (catch 'simula-out
 832     (while t
 833       (skip-chars-forward " \t\n\f")
 834       ;; BUG: the following (0 2) branches don't take into account intermixing
 835       ;; directive lines
 836       (cond
 837        ((looking-at "!\\|\\<comment\\>")
 838         (search-forward ";" nil 'move))
 839        ((and (bolp) (eq (following-char) ?%))
 840         (beginning-of-line 2))
 841        ((and (looking-at "[a-z0-9_]*[ \t\f]*:[^-=]")
 842              (not (looking-at "virtual\\>")))
 843         (skip-chars-forward "a-zA-Z0-9_ \t\f:"))
 844        (t
 845         (throw 'simula-out t))))))
 846
 847
 848 (defun simula-forward-up-level ()
 849   (let ((continue-loop t)
 850         (origin (point))
 851         (case-fold-search t)
 852         return-value
 853         temp)
 854     (while continue-loop
 855       (if (re-search-backward "\\<begin\\>\\|\\<end\\>" (point-min) 'move)
 856           (setq temp (simula-context)
 857               return-value (and (memq (preceding-char) '(?d ?D))
 858                                 (memq temp '(nil 2)))
 859               continue-loop (and (not return-value)
 860                                  (simula-forward-up-level)))
 861         (setq continue-loop nil)))
 862     (if return-value
 863         t
 864       (goto-char origin)
 865       nil)))
 866
 867
 868 (defun simula-calculate-indent ()
 869   (save-excursion
 870     (let ((where (simula-context))
 871           (origin (point))
 872           (indent 0)
 873           continued
 874           start-line
 875           temp
 876           found-end
 877           prev-cont)
 878       (cond
 879        ((eq where 0)
 880         ;;
 881         ;; Comment.
 882         ;; If comment started on previous non-blank line, indent to the
 883         ;; column where the comment started, else indent as that line.
 884         ;;
 885         (skip-chars-backward " \t\n\f")
 886         (while (and (not (bolp)) (eq (simula-context) 0))
 887           (re-search-backward "^\\|!\\|\\<comment\\>"))
 888         (skip-chars-forward " \t\n\f")
 889         (prog1
 890             (current-column)
 891           (goto-char origin)))
 892        ((eq where 1)
 893         ;;
 894         ;; Directive. Always 0.
 895         ;;
 896         0)
 897        ;;
 898        ;; Detect missing string delimiters
 899        ;;
 900        ((eq where 3)
 901         (error "Inside string"))
 902        ((eq where 4)
 903         (error "Inside character constant"))
 904        ;;
 905        ;; check to see if inside ()'s
 906        ;;
 907        ((setq temp (simula-inside-parens))
 908         temp)
 909        ;;
 910        ;; Calculate non-comment indentation
 911        (t
 912         ;; first, find out if this line starts with something that needs
 913         ;; special indentation (END/IF/THEN/ELSE/WHEN/OTHERWISE or label)
 914         ;;
 915         (skip-chars-forward " \t\f")
 916         (cond
 917          ;;
 918          ;; END
 919          ;;
 920          ((looking-at "end\\>")
 921           (setq indent (- simula-indent-level)
 922                 found-end t))
 923          ;;
 924          ;; IF/THEN/ELSE
 925          ;;
 926          ((looking-at "if\\>\\|then\\>\\|else\\>")
 927           ;; search for the *starting* IF
 928           (cond
 929            ((memq (following-char) '(?T ?t))
 930             (setq indent (car simula-if-indent)))
 931            ((memq (following-char) '(?E ?e))
 932             (setq indent (cdr simula-if-indent)))
 933            (t
 934             (forward-word 1)
 935             (setq indent 0)))
 936           (simula-find-if))
 937          ;;
 938          ;; WHEN/OTHERWISE
 939          ;;
 940          ((looking-at "when\\>\\|otherwise\\>")
 941           ;; search for corresponding INSPECT
 942           (if (memq (following-char) '(?W ?w))
 943               (setq indent (car simula-inspect-indent))
 944             (setq indent (cdr simula-inspect-indent)))
 945           (simula-find-inspect))
 946          ;;
 947          ;; label:
 948          ;;
 949          ((and (not (looking-at "virtual\\>"))
 950                (looking-at "[a-z0-9_]*[ \t\f]*:[^-=]"))
 951           (setq indent simula-label-offset)))
 952         ;; find line with non-comment text
 953         (simula-skip-comment-backward 'dont-skip-end)
 954         (if (and found-end
 955                  (not (eq (preceding-char) ?\;))
 956                  (if (memq (preceding-char) '(?N ?n))
 957                      (save-excursion
 958                        (backward-word 1)
 959                        (not (looking-at "begin\\>")))
 960                    t))
 961             (progn
 962               (simula-previous-statement 1)
 963               (simula-skip-comment-backward)))
 964         (setq start-line
 965               (save-excursion (beginning-of-line) (point))
 966               ;; - perhaps this is a continued statement
 967               continued
 968               (save-excursion
 969                 (and (not (bobp))
 970                      ;; (not found-end)
 971                      (if (eq (char-syntax (preceding-char)) ?w)
 972                          (progn
 973                            (backward-word 1)
 974                            (not (looking-at
 975                                  "begin\\|then\\|else\\|when\\|otherwise\\|do"
 976                                  )))
 977                        (not (memq (preceding-char) '(?: ?\;)))))))
 978         ;;
 979         ;; MAIN calculation loop - count BEGIN/DO etc.
 980         ;;
 981         (while (not (bolp))
 982           (if (re-search-backward
 983                ";\\|\\<\\(begin\\|end\\|if\\|else\\|then\\|when\\|otherwise\\|do\\)\\>"
 984                start-line 'move)
 985               (if (simula-context)
 986                   ();; found something in a comment/string - ignore
 987                 (setq temp (following-char))
 988                 (cond
 989                  ((eq temp ?\;)
 990                   (simula-previous-statement 1))
 991                  ((looking-at "begin\\>")
 992                   (setq indent (+ indent simula-indent-level)))
 993                  ((looking-at "end\\>")
 994                   (forward-word 1)
 995                   (simula-previous-statement 1))
 996                  ((looking-at "do\\>")
 997                   (setq indent (+ indent simula-substatement-offset))
 998                   (simula-find-do-match))
 999                  ((looking-at "\\(if\\|then\\|else\\)\\>")
1000                   (if (memq temp '(?I ?i))
1001                       (forward-word 1)
1002                     (setq indent (+ indent
1003                                     simula-substatement-offset
1004                                     (if (memq temp '(?T ?t))
1005                                         (car simula-if-indent)
1006                                       (cdr simula-if-indent)))))
1007                   (simula-find-if))
1008                  ((looking-at "\\<when\\>\\|\\<otherwise\\>")
1009                   (setq indent (+ indent
1010                                   simula-substatement-offset
1011                                   (if (memq temp '(?W ?w))
1012                                       (car simula-if-indent)
1013                                     (cdr simula-if-indent))))
1014                   (simula-find-inspect)))
1015                 ;; found the start of a [sub]statement
1016                 ;; add indentation for continued statement
1017                 (if continued
1018                     (setq indent
1019                           (+ indent
1020                              (if (listp simula-continued-statement-offset)
1021                                  (car simula-continued-statement-offset)
1022                                simula-continued-statement-offset))))
1023                 (setq start-line
1024                       (save-excursion (beginning-of-line) (point))
1025                       continued nil))
1026             ;; search failed .. point is at beginning of line
1027             ;; determine if we should continue searching
1028             ;; (at or before comment or label)
1029             ;; temp = t means finished
1030             (setq temp
1031                   (and (not (simula-context))
1032                        (save-excursion
1033                          (skip-chars-forward " \t\f")
1034                          (or (looking-at "virtual")
1035                              (not
1036                               (looking-at
1037                                "!\\|comment\\>\\|[a-z0-9_]*[ \t\f]*:[^-=]")))))
1038                   prev-cont continued)
1039             ;; if we are finished, find current line's indentation
1040             (if temp
1041                 (setq indent (+ indent (current-indentation))))
1042             ;; find next line with non-comment SIMULA text
1043             ;; maybe indent extra if statement continues
1044             (simula-skip-comment-backward)
1045             (setq continued
1046                   (and (not (bobp))
1047                        (if (eq (char-syntax (preceding-char)) ?w)
1048                            (save-excursion
1049                              (backward-word 1)
1050                              (not (looking-at
1051                                    "begin\\|then\\|else\\|when\\|otherwise\\|do")))
1052                          (not (memq (preceding-char) '(?: ?\;))))))
1053             ;; if we the state of the continued-variable
1054             ;; changed, add indentation for continued statement
1055             (if (or (and prev-cont (not continued))
1056                     (and continued
1057                          (listp simula-continued-statement-offset)))
1058                 (setq indent
1059                       (+ indent
1060                          (if (listp simula-continued-statement-offset)
1061                              (car simula-continued-statement-offset)
1062                            simula-continued-statement-offset))))
1063             ;; while ends if point is at beginning of line at loop test
1064             (if (not temp)
1065                 (setq start-line (save-excursion (beginning-of-line) (point)))
1066               (beginning-of-line))))
1067         ;;
1068         ;; return indentation
1069         ;;
1070         indent)))))
1071
1072
1073 (defun simula-find-if ()
1074   "Find starting IF of a IF-THEN[-ELSE[-IF-THEN...]] statement."
1075   (catch 'simula-out
1076     (while t
1077       (if (and (simula-search-backward "\\<if\\>\\|;\\|\\<begin\\>"nil t)
1078                (memq (following-char) '(?I ?i)))
1079           (save-excursion
1080             ;;
1081             ;; find out if this IF was really the start of the IF statement
1082             ;;
1083             (simula-skip-comment-backward)
1084             (if (and (eq (char-syntax (preceding-char)) ?w)
1085                      (progn
1086                        (backward-word 1)
1087                        (looking-at "else\\>")))
1088                 ()
1089               (throw 'simula-out t)))
1090         (if (not (looking-at "\\<if\\>"))
1091             (error "Missing IF or misplaced BEGIN or ';' (can't find IF)")
1092           ;;
1093           ;; we were at the starting IF in the first place..
1094           ;;
1095           (throw 'simula-out t))))))
1096
1097
1098 (defun simula-find-inspect ()
1099   "Find INSPECT matching WHEN or OTHERWISE."
1100   (catch 'simula-out
1101     (let ((level 0))
1102       ;;
1103       ;; INSPECTs can be nested, have to find the corresponding one
1104       ;;
1105       (while t
1106         (if (and (simula-search-backward "\\<inspect\\>\\|\\<otherwise\\>\\|;"
1107                                           nil t)
1108                  (/= (following-char) ?\;))
1109             (if (memq (following-char) '(?O ?o))
1110                 (setq level (1+ level))
1111               (if (zerop level)
1112                   (throw 'simula-out t)
1113                 (setq level (1- level))))
1114           (error "Missing INSPECT or misplaced ';' (can't find INSPECT)"))))))
1115
1116
1117 (defun simula-find-do-match ()
1118   "Find keyword matching DO: FOR, WHILE, INSPECT or WHEN."
1119   (while (and (re-search-backward
1120                "\\<\\(do\\|for\\|while\\|inspect\\|when\\|end\\|begin\\)\\>\\|;"
1121                nil 'move)
1122               (simula-context)))
1123   (if (and (looking-at "\\<\\(for\\|while\\|inspect\\|when\\)\\>")
1124            (not (simula-context)))
1125       () ;; found match
1126     (error "No matching FOR, WHILE or INSPECT for DO, or misplaced ';'")))
1127
1128
1129 (defun simula-inside-parens ()
1130   "Return position after `(' on line if inside parentheses, nil otherwise."
1131   (save-excursion
1132     (let ((parlevel 0))
1133       (catch 'simula-out
1134         (while t
1135           (if (re-search-backward "(\\|)\\|;" nil t)
1136               (if (eq (simula-context) nil)
1137                   ;; found something - check it out
1138                   (cond
1139                    ((eq (following-char) ?\;)
1140                     (if (zerop parlevel)
1141                         (throw 'simula-out nil)
1142                       (error "Parenthesis mismatch or misplaced ';'")))
1143                    ((eq (following-char) ?\()
1144                     (if (zerop parlevel)
1145                         (throw 'simula-out (1+ (current-column)))
1146                       (setq parlevel (1- parlevel))))
1147                    (t (setq parlevel (1+ parlevel))))
1148                 );; nothing - inside comment or string
1149             ;; search failed
1150             (throw 'simula-out nil)))))))
1151
1152
1153 (defun simula-goto-definition ()
1154   "Goto point of definition of variable, procedure or class."
1155   (interactive))
1156
1157
1158 (defun simula-expand-stdproc ()
1159   (if (or (not simula-abbrev-stdproc) (simula-context))
1160       (unexpand-abbrev)
1161     (cond
1162      ((eq simula-abbrev-stdproc 'upcase) (upcase-word -1))
1163      ((eq simula-abbrev-stdproc 'downcase) (downcase-word -1))
1164      ((eq simula-abbrev-stdproc 'capitalize) (capitalize-word -1))
1165      ((eq simula-abbrev-stdproc 'abbrev-table)
1166       ;; If not in lowercase, expansions are always capitalized.
1167       ;; We then want to replace with the exact expansion.
1168       (if (equal (symbol-name last-abbrev) last-abbrev-text)
1169           ()
1170         (downcase-word -1)
1171         (expand-abbrev))))))
1172
1173
1174 (defun simula-expand-keyword ()
1175   (if (or (not simula-abbrev-keyword) (simula-context))
1176       (unexpand-abbrev)
1177     (cond
1178      ((eq simula-abbrev-keyword 'upcase) (upcase-word -1))
1179      ((eq simula-abbrev-keyword 'downcase) (downcase-word -1))
1180      ((eq simula-abbrev-keyword 'capitalize) (capitalize-word -1))
1181      ((eq simula-abbrev-stdproc 'abbrev-table)
1182       (if (equal (symbol-name last-abbrev) last-abbrev-text)
1183           ()
1184         (downcase-word -1)
1185         (expand-abbrev))))))
1186
1187
1188 (defun simula-electric-keyword ()
1189   "Expand SIMULA keyword.  If it starts the line, reindent."
1190   ;; redisplay
1191   (let ((show-char (eq this-command 'self-insert-command)))
1192     ;; If the abbrev expansion results in reindentation, the user may have
1193     ;; to wait some time before the character he typed is displayed
1194     ;; (the char causing the expansion is inserted AFTER the hook function
1195     ;; is called). This is annoying in case of normal characters.
1196     ;; However, if the user pressed a key bound to newline, it is better
1197     ;; to have the line inserted after the begin-end match.
1198     (if show-char
1199         (progn
1200           (insert-char last-command-event 1)
1201           (sit-for 0)
1202           (backward-char 1)))
1203     (if (let ((where (simula-context))
1204               (case-fold-search t))
1205           (if where
1206               (if (and (eq where 2) (eq (char-syntax (preceding-char)) ?w))
1207                   (save-excursion
1208                     (backward-word 1)
1209                     (not (looking-at "end\\>"))))))
1210         (unexpand-abbrev)
1211       (cond
1212        ((not simula-abbrev-keyword) (unexpand-abbrev))
1213        ((eq simula-abbrev-keyword 'upcase) (upcase-word -1))
1214        ((eq simula-abbrev-keyword 'downcase) (downcase-word -1))
1215        ((eq simula-abbrev-keyword 'capitalize) (capitalize-word -1)))
1216       (let ((pos (- (point-max) (point)))
1217             (case-fold-search t)
1218             null)
1219         (condition-case null
1220             (progn
1221               ;; check if the expanded word is on the beginning of the line.
1222               (if (and (eq (char-syntax (preceding-char)) ?w)
1223                        (progn
1224                          (backward-word 1)
1225                          (if (looking-at "end\\>")
1226                              (save-excursion
1227                                (simula-backward-up-level 1)
1228                                (if (pos-visible-in-window-p)
1229                                    (sit-for 1)
1230                                  (message "Matches %s"
1231                                           (buffer-substring
1232                                            (point)
1233                                            (+ (point) (window-width)))))))
1234                          (skip-chars-backward " \t\f")
1235                          (bolp)))
1236                   (let ((indent (simula-calculate-indent)))
1237                     (if (eq indent (current-indentation))
1238                         ()
1239                       (delete-horizontal-space)
1240                       (indent-to indent)))
1241                 (skip-chars-forward " \t\f"))
1242               ;; check for END - blow whistles and ring bells
1243
1244               (goto-char (- (point-max) pos))
1245               (if show-char
1246                   (delete-char 1)))
1247           (quit (goto-char (- (point-max) pos))))))))
1248
1249
1250 (defun simula-search-backward (regexp &optional bound noerror)
1251   "Search backward from point for regular expression REGEXP,
1252 ignoring matches found inside SIMULA comments, string literals,
1253 and BEGIN..END blocks.
1254 Set point to the end of the occurrence found, and return point.
1255 An optional second argument BOUND bounds the search, it is a buffer position.
1256 The match found must not extend after that position.  Optional third argument
1257 NOERROR, if t, means if fail just return nil (no error).
1258 If not nil and not t, move to limit of search and return nil."
1259   (let (begin end context (comb-regexp (concat regexp "\\|\\<end\\>"))
1260               match (start-point (point)))
1261     (catch 'simula-backward
1262       (while (re-search-backward comb-regexp bound 1)
1263         ;; We have a match, check SIMULA context at match-beginning
1264         ;; to see if we are outside comments etc.
1265         ;; Set MATCH to t if we found a true match,
1266         ;; set MATCH to 'BLOCK if we found a BEGIN..END block,
1267         ;; else set MATCH to nil.
1268         (save-match-data
1269           (setq context (simula-context))
1270           (cond
1271            ((eq context nil)
1272             (setq match (if (looking-at regexp) t 'BLOCK)))
1273            ;; A comment-ending `;' is part of the comment, and shouldn't match.
1274            ;; ((eq context 0)
1275            ;;  (setq match (if (eq (following-char) ?\;) t nil)))
1276            ((eq context 2)
1277             (setq match (if (and (looking-at regexp)
1278                                  (looking-at ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>"))
1279                             t
1280                           (if (looking-at "\\<end\\>") 'BLOCK nil))))
1281            (t (setq match nil))))
1282         ;; Exit if true match
1283         (if (eq match t) (throw 'simula-backward (point)))
1284         (if (eq match 'BLOCK)
1285         ;; We found the END of a block
1286             (let ((level 0))
1287               (while (natnump level)
1288                   (if (re-search-backward "\\<begin\\>\\|\\<end\\>" bound 1)
1289                       (let ((context (simula-context)))
1290                         ;;    We found a BEGIN -> decrease level count
1291                         (cond ((and (eq context nil)
1292                                    (memq (following-char) '(?b ?B)))
1293                                (setq level (1- level)))
1294                               ;; END -> increase level count
1295                               ((and (memq context '(nil 2))
1296                                     (memq (following-char) '(?e ?E)))
1297                                (setq level (1+ level)))))
1298                     ;; Block search failed.  Action depends on noerror.
1299                     (if (or (not noerror) (eq noerror t))
1300                         (goto-char start-point))
1301                     (if (not noerror)
1302                         (signal 'search-failed (list regexp)))
1303                     (throw 'simula-backward nil))))))
1304       ;; Search failed.  Action depends on noerror.
1305       (if (or (not noerror) (eq noerror t))
1306           (goto-char start-point))
1307       (if noerror
1308           nil
1309         (signal 'search-failed (list regexp))))))
1310
1311
1312 (defun simula-search-forward (regexp &optional bound noerror)
1313   "Search forward from point for regular expression REGEXP,
1314 ignoring matches found inside SIMULA comments, string literals,
1315 and BEGIN..END blocks.
1316 Set point to the end of the occurrence found, and return point.
1317 An optional second argument BOUND bounds the search, it is a buffer position.
1318 The match found must not extend after that position.  Optional third argument
1319 NOERROR, if t, means if fail just return nil (no error).
1320 If not nil and not t, move to limit of search and return nil."
1321   (let (begin end context (comb-regexp (concat regexp "\\|\\<begin\\>"))
1322               match (start-point (point)))
1323     (catch 'simula-forward
1324       (while (re-search-forward comb-regexp bound 1)
1325         ;; We have a match, check SIMULA context at match-beginning
1326         ;; to see if we are outside comments.
1327         ;; Set MATCH to t if we found a true match,
1328         ;; set MATCH to 'BLOCK if we found a BEGIN..END block,
1329         ;; else set MATCH to nil.
1330         (save-match-data
1331           (save-excursion
1332             (goto-char (match-beginning 0))
1333             (setq context (simula-context))
1334             (cond
1335              ((not context)
1336               (setq match (if (looking-at regexp) t 'BLOCK)))
1337              ;; Comment-ending `;' is part of the comment, and shouldn't match.
1338              ;; ((eq context 0)
1339              ;;  (setq match (if (eq (following-char) ?\;) t nil)))
1340              ((eq context 2)
1341               (setq match (if (and (looking-at regexp)
1342                                    (looking-at ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>")) t nil)))
1343              (t (setq match nil)))))
1344         ;; Exit if true match
1345         (if (eq match t) (throw 'simula-forward (point)))
1346         (if (eq match 'BLOCK)
1347         ;; We found the BEGINning of a block
1348             (let ((level 0))
1349               (while (natnump level)
1350                   (if (re-search-forward "\\<begin\\>\\|\\<end\\>" bound 1)
1351                       (let ((context (simula-context)))
1352                         ;;    We found a BEGIN -> increase level count
1353                         (cond ((eq context nil) (setq level (1+ level)))
1354                               ;; END -> decrease level count
1355                               ((and (eq context 2)
1356                                     ;; Don't match BEGIN inside END comment
1357                                     (memq (preceding-char) '(?d ?D)))
1358                                (setq level (1- level)))))
1359                     ;; Block search failed.  Action depends on noerror.
1360                     (if (or (not noerror) (eq noerror t))
1361                         (goto-char start-point))
1362                     (if (not noerror)
1363                         (signal 'search-failed (list regexp)))
1364                     (throw 'simula-forward nil))))))
1365       ;; Search failed.  Action depends on noerror.
1366       (if (or (not noerror) (eq noerror t))
1367           (goto-char start-point))
1368       (if noerror
1369           nil
1370         (signal 'search-failed (list regexp))))))
1371
1372
1373 (defun simula-install-standard-abbrevs ()
1374   "Define Simula keywords, procedures and classes in local abbrev table."
1375   ;; procedure and class names are as of the SIMULA 87 standard.
1376   (interactive)
1377   (dolist (args
1378           '(("abs" "Abs" simula-expand-stdproc)
1379             ("accum" "Accum" simula-expand-stdproc)
1380             ("activate" "ACTIVATE" simula-expand-keyword)
1381             ("addepsilon" "AddEpsilon" simula-expand-stdproc)
1382             ("after" "AFTER" simula-expand-keyword)
1383             ("and" "AND" simula-expand-keyword)
1384             ("arccos" "ArcCos" simula-expand-stdproc)
1385             ("arcsin" "ArcSin" simula-expand-stdproc)
1386             ("arctan" "ArcTan" simula-expand-stdproc)
1387             ("arctan2" "ArcTan2" simula-expand-stdproc)
1388             ("array" "ARRAY" simula-expand-keyword)
1389             ("at" "AT" simula-expand-keyword)
1390             ("before" "BEFORE" simula-expand-keyword)
1391             ("begin" "BEGIN" simula-expand-keyword)
1392             ("blanks" "Blanks" simula-expand-stdproc)
1393             ("boolean" "BOOLEAN" simula-expand-keyword)
1394             ("breakoutimage" "BreakOutImage" simula-expand-stdproc)
1395             ("bytefile" "ByteFile" simula-expand-stdproc)
1396             ("call" "Call" simula-expand-stdproc)
1397             ("cancel" "Cancel" simula-expand-stdproc)
1398             ("cardinal" "Cardinal" simula-expand-stdproc)
1399             ("char" "Char" simula-expand-stdproc)
1400             ("character" "CHARACTER" simula-expand-keyword)
1401             ("checkpoint" "CheckPoint" simula-expand-stdproc)
1402             ("class" "CLASS" simula-expand-keyword)
1403             ("clear" "Clear" simula-expand-stdproc)
1404             ("clocktime" "ClockTime" simula-expand-stdproc)
1405             ("close" "Close" simula-expand-stdproc)
1406             ("comment" "COMMENT" simula-expand-keyword)
1407             ("constant" "Constant" simula-expand-stdproc)
1408             ("copy" "Copy" simula-expand-stdproc)
1409             ("cos" "Cos" simula-expand-stdproc)
1410             ("cosh" "CosH" simula-expand-stdproc)
1411             ("cotan" "CoTan" simula-expand-stdproc)
1412             ("cputime" "CpuTime" simula-expand-stdproc)
1413             ("current" "Current" simula-expand-stdproc)
1414             ("datetime" "DateTime" simula-expand-stdproc)
1415             ("decimalmark" "DecimalMark" simula-expand-stdproc)
1416             ("delay" "DELAY" simula-expand-keyword)
1417             ("deleteimage" "DeleteImage" simula-expand-stdproc)
1418             ("detach" "Detach" simula-expand-stdproc)
1419             ("digit" "Digit" simula-expand-stdproc)
1420             ("directbytefile" "DirectByteFile" simula-expand-stdproc)
1421             ("directfile" "DirectFile" simula-expand-stdproc)
1422             ("discrete" "Discrete" simula-expand-stdproc)
1423             ("do" "DO" simula-expand-keyword)
1424             ("downcase" "Downcase" simula-expand-stdproc)
1425             ("draw" "Draw" simula-expand-stdproc)
1426             ("eject" "Eject" simula-expand-stdproc)
1427             ("else" "ELSE" simula-electric-keyword)
1428             ("empty" "Empty" simula-expand-stdproc)
1429             ("end" "END" simula-electric-keyword)
1430             ("endfile" "Endfile" simula-expand-stdproc)
1431             ("entier" "Entier" simula-expand-stdproc)
1432             ("eq" "EQ" simula-expand-keyword)
1433             ("eqv" "EQV" simula-expand-keyword)
1434             ("erlang" "Erlang" simula-expand-stdproc)
1435             ("error" "Error" simula-expand-stdproc)
1436             ("evtime" "EvTime" simula-expand-stdproc)
1437             ("exp" "Exp" simula-expand-stdproc)
1438             ("external" "EXTERNAL" simula-expand-keyword)
1439             ("false" "FALSE" simula-expand-keyword)
1440             ("field" "Field" simula-expand-stdproc)
1441             ("file" "File" simula-expand-stdproc)
1442             ("first" "First" simula-expand-stdproc)
1443             ("follow" "Follow" simula-expand-stdproc)
1444             ("for" "FOR" simula-expand-keyword)
1445             ("ge" "GE" simula-expand-keyword)
1446             ("getchar" "GetChar" simula-expand-stdproc)
1447             ("getfrac" "GetFrac" simula-expand-stdproc)
1448             ("getint" "GetInt" simula-expand-stdproc)
1449             ("getreal" "GetReal" simula-expand-stdproc)
1450             ("go" "GO" simula-expand-keyword)
1451             ("goto" "GOTO" simula-expand-keyword)
1452             ("gt" "GT" simula-expand-keyword)
1453             ("head" "Head" simula-expand-stdproc)
1454             ("hidden" "HIDDEN" simula-expand-keyword)
1455             ("histd" "HistD" simula-expand-stdproc)
1456             ("histo" "Histo" simula-expand-stdproc)
1457             ("hold" "Hold" simula-expand-stdproc)
1458             ("idle" "Idle" simula-expand-stdproc)
1459             ("if" "IF" simula-expand-keyword)
1460             ("image" "Image" simula-expand-stdproc)
1461             ("imagefile" "ImageFile" simula-expand-stdproc)
1462             ("imp" "IMP" simula-expand-keyword)
1463             ("in" "IN" simula-expand-keyword)
1464             ("inbyte" "InByte" simula-expand-stdproc)
1465             ("inbytefile" "InByteFile" simula-expand-stdproc)
1466             ("inchar" "InChar" simula-expand-stdproc)
1467             ("infile" "InFile" simula-expand-stdproc)
1468             ("infrac" "InFrac" simula-expand-stdproc)
1469             ("inimage" "InImage" simula-expand-stdproc)
1470             ("inint" "InInt" simula-expand-stdproc)
1471             ("inner" "INNER" simula-expand-keyword)
1472             ("inreal" "InReal" simula-expand-stdproc)
1473             ("inrecord" "InRecord" simula-expand-stdproc)
1474             ("inspect" "INSPECT" simula-expand-keyword)
1475             ("integer" "INTEGER" simula-expand-keyword)
1476             ("intext" "InText" simula-expand-stdproc)
1477             ("into" "Into" simula-expand-stdproc)
1478             ("is" "IS" simula-expand-keyword)
1479             ("isochar" "ISOChar" simula-expand-stdproc)
1480             ("isopen" "IsOpen" simula-expand-stdproc)
1481             ("isorank" "ISORank" simula-expand-stdproc)
1482             ("label" "LABEL" simula-expand-keyword)
1483             ("last" "Last" simula-expand-stdproc)
1484             ("lastitem" "LastItem" simula-expand-stdproc)
1485             ("lastloc" "LastLoc" simula-expand-stdproc)
1486             ("le" "LE" simula-expand-keyword)
1487             ("length" "Length" simula-expand-stdproc)
1488             ("letter" "Letter" simula-expand-stdproc)
1489             ("line" "Line" simula-expand-stdproc)
1490             ("linear" "Linear" simula-expand-stdproc)
1491             ("linesperpage" "LinesPerPage" simula-expand-stdproc)
1492             ("link" "Link" simula-expand-stdproc)
1493             ("linkage" "Linkage" simula-expand-stdproc)
1494             ("ln" "Ln" simula-expand-stdproc)
1495             ("locate" "Locate" simula-expand-stdproc)
1496             ("location" "Location" simula-expand-stdproc)
1497             ("lock" "Lock" simula-expand-stdproc)
1498             ("locked" "Locked" simula-expand-stdproc)
1499             ("log10" "Log10" simula-expand-stdproc)
1500             ("long" "LONG" simula-expand-keyword)
1501             ("lowcase" "LowCase" simula-expand-stdproc)
1502             ("lowerbound" "LowerBound" simula-expand-stdproc)
1503             ("lowten" "LowTen" simula-expand-stdproc)
1504             ("lt" "LT" simula-expand-keyword)
1505             ("main" "Main" simula-expand-stdproc)
1506             ("max" "Max" simula-expand-stdproc)
1507             ("maxint" "MaxInt" simula-expand-stdproc)
1508             ("maxlongreal" "MaxLongReal" simula-expand-stdproc)
1509             ("maxloc" "MaxLoc" simula-expand-stdproc)
1510             ("maxrank" "MaxRank" simula-expand-stdproc)
1511             ("maxreal" "MaxReal" simula-expand-stdproc)
1512             ("min" "Min" simula-expand-stdproc)
1513             ("minint" "MinInt" simula-expand-stdproc)
1514             ("minlongreal" "MinLongReal" simula-expand-stdproc)
1515             ("minrank" "MinRank" simula-expand-stdproc)
1516             ("minreal" "MinReal" simula-expand-stdproc)
1517             ("mod" "Mod" simula-expand-stdproc)
1518             ("more" "More" simula-expand-stdproc)
1519             ("name" "NAME" simula-expand-keyword)
1520             ("ne" "NE" simula-expand-keyword)
1521             ("negexp" "NegExp" simula-expand-stdproc)
1522             ("new" "NEW" simula-expand-keyword)
1523             ("nextev" "NextEv" simula-expand-stdproc)
1524             ("none" "NONE" simula-expand-keyword)
1525             ("normal" "Normal" simula-expand-stdproc)
1526             ("not" "NOT" simula-expand-keyword)
1527             ("notext" "NOTEXT" simula-expand-keyword)
1528             ("open" "Open" simula-expand-stdproc)
1529             ("or" "OR" simula-expand-keyword)
1530             ("otherwise" "OTHERWISE" simula-electric-keyword)
1531             ("out" "Out" simula-expand-stdproc)
1532             ("outbyte" "OutByte" simula-expand-stdproc)
1533             ("outbytefile" "OutByteFile" simula-expand-stdproc)
1534             ("outchar" "OutChar" simula-expand-stdproc)
1535             ("outfile" "OutFile" simula-expand-stdproc)
1536             ("outfix" "OutFix" simula-expand-stdproc)
1537             ("outfrac" "OutFrac" simula-expand-stdproc)
1538             ("outimage" "OutImage" simula-expand-stdproc)
1539             ("outint" "OutInt" simula-expand-stdproc)
1540             ("outreal" "OutReal" simula-expand-stdproc)
1541             ("outrecord" "OutRecord" simula-expand-stdproc)
1542             ("outtext" "OutText" simula-expand-stdproc)
1543             ("page" "Page" simula-expand-stdproc)
1544             ("passivate" "Passivate" simula-expand-stdproc)
1545             ("poisson" "Poisson" simula-expand-stdproc)
1546             ("pos" "Pos" simula-expand-stdproc)
1547             ("precede" "Precede" simula-expand-stdproc)
1548             ("pred" "Pred" simula-expand-stdproc)
1549             ("prev" "Prev" simula-expand-stdproc)
1550             ("printfile" "PrintFile" simula-expand-stdproc)
1551             ("prior" "PRIOR" simula-expand-keyword)
1552             ("procedure" "PROCEDURE" simula-expand-keyword)
1553             ("process" "Process" simula-expand-stdproc)
1554             ("protected" "PROTECTED" simula-expand-keyword)
1555             ("putchar" "PutChar" simula-expand-stdproc)
1556             ("putfix" "PutFix" simula-expand-stdproc)
1557             ("putfrac" "PutFrac" simula-expand-stdproc)
1558             ("putint" "PutInt" simula-expand-stdproc)
1559             ("putreal" "PutReal" simula-expand-stdproc)
1560             ("qua" "QUA" simula-expand-keyword)
1561             ("randint" "RandInt" simula-expand-stdproc)
1562             ("rank" "Rank" simula-expand-stdproc)
1563             ("reactivate" "REACTIVATE" simula-expand-keyword)
1564             ("real" "REAL" simula-expand-keyword)
1565             ("ref" "REF" simula-expand-keyword)
1566             ("resume" "Resume" simula-expand-stdproc)
1567             ("setaccess" "SetAccess" simula-expand-stdproc)
1568             ("setpos" "SetPos" simula-expand-stdproc)
1569             ("short" "SHORT" simula-expand-keyword)
1570             ("sign" "Sign" simula-expand-stdproc)
1571             ("simset" "SimSet" simula-expand-stdproc)
1572             ("simulaid" "SimulaId" simula-expand-stdproc)
1573             ("simulation" "Simulation" simula-expand-stdproc)
1574             ("sin" "Sin" simula-expand-stdproc)
1575             ("sinh" "SinH" simula-expand-stdproc)
1576             ("sourceline" "SourceLine" simula-expand-stdproc)
1577             ("spacing" "Spacing" simula-expand-stdproc)
1578             ("sqrt" "Sqrt" simula-expand-stdproc)
1579             ("start" "Start" simula-expand-stdproc)
1580             ("step" "STEP" simula-expand-keyword)
1581             ("strip" "Strip" simula-expand-stdproc)
1582             ("sub" "Sub" simula-expand-stdproc)
1583             ("subepsilon" "SubEpsilon" simula-expand-stdproc)
1584             ("suc" "Suc" simula-expand-stdproc)
1585             ("switch" "SWITCH" simula-expand-keyword)
1586             ("sysin" "SysIn" simula-expand-stdproc)
1587             ("sysout" "SysOut" simula-expand-stdproc)
1588             ("tan" "Tan" simula-expand-stdproc)
1589             ("tanh" "TanH" simula-expand-stdproc)
1590             ("terminate_program" "Terminate_Program" simula-expand-stdproc)
1591             ("terminated" "Terminated" simula-expand-stdproc)
1592             ("text" "TEXT" simula-expand-keyword)
1593             ("then" "THEN" simula-electric-keyword)
1594             ("this" "THIS" simula-expand-keyword)
1595             ("time" "Time" simula-expand-stdproc)
1596             ("to" "TO" simula-expand-keyword)
1597             ("true" "TRUE" simula-expand-keyword)
1598             ("uniform" "Uniform" simula-expand-stdproc)
1599             ("unlock" "Unlock" simula-expand-stdproc)
1600             ("until" "UNTIL" simula-expand-keyword)
1601             ("upcase" "Upcase" simula-expand-stdproc)
1602             ("upperbound" "UpperBound" simula-expand-stdproc)
1603             ("value" "VALUE" simula-expand-keyword)
1604             ("virtual" "VIRTUAL" simula-expand-keyword)
1605             ("wait" "Wait" simula-expand-stdproc)
1606             ("when" "WHEN" simula-electric-keyword)
1607             ("while" "WHILE" simula-expand-keyword)))
1608     (define-abbrev simula-mode-abbrev-table
1609       (nth 0 args) (nth 1 args) (nth 2 args) nil 'system)))
1610
1611 (if simula-abbrev-file
1612     (read-abbrev-file simula-abbrev-file))
1613 (let (abbrevs-changed)
1614   (simula-install-standard-abbrevs))
1615
1616 ;; Hilit mode support.
1617 (when (fboundp 'hilit-set-mode-patterns)
1618   (when (and (boundp 'hilit-patterns-alist)
1619              (not (assoc 'simula-mode hilit-patterns-alist)))
1620     (hilit-set-mode-patterns
1621      'simula-mode
1622      '(
1623        ("^%\\([ \t\f].*\\)?$" nil comment)
1624        ("^%include\\>" nil include)
1625        ("\"[^\"\n]*\"\\|'.'\\|'![0-9]+!'" nil string)
1626        ("\\<\\(ACTIVATE\\|AFTER\\|AND\\|ARRAY\\|AT\\|BEFORE\\|BEGIN\\|BOOLEAN\\|CHARACTER\\|CLASS\\|DELAY\\|DO\\|ELSE\\|END\\|EQ\\|EQV\\|EXTERNAL\\|FALSE\\|FOR\\|GE\\|GO\\|GOTO\\|GT\\|HIDDEN\\|IF\\|IMP\\|IN\\|INNER\\|INSPECT\\|INTEGER\\|IS\\|LABEL\\|LE\\|LONG\\|LT\\|NAME\\|NE\\|NEW\\|NONE\\|NOT\\|NOTEXT\\|OR\\|OTHERWISE\\|PRIOR\\|PROCEDURE\\|PROTECTED\\|QUA\\|REACTIVATE\\|REAL\\|REF\\|SHORT\\|STEP\\|SWITCH\\|TEXT\\|THEN\\|THIS\\|TO\\|TRUE\\|UNTIL\\|VALUE\\|VIRTUAL\\|WHEN\\|WHILE\\)\\>" nil keyword)
1627        ("!\\|\\<COMMENT\\>" ";" comment))
1628      nil 'case-insensitive)))
1629 \f
1630 ;; defuns for submitting bug reports
1631
1632 (defconst simula-mode-help-address "bug-gnu-emacs@gnu.org"
1633   "Address accepting submission of `simula-mode' bug reports.")
1634
1635 (defun simula-submit-bug-report ()
1636   "Submit via mail a bug report on `simula-mode'."
1637   (interactive)
1638   (and
1639    (y-or-n-p "Do you want to submit a report on simula-mode? ")
1640    (reporter-submit-bug-report
1641     simula-mode-help-address
1642     (concat "simula-mode from Emacs " emacs-version)
1643     (list
1644      ;; report only the vars that affect indentation
1645      'simula-indent-level
1646      'simula-substatement-offset
1647      'simula-continued-statement-offset
1648      'simula-label-offset
1649      'simula-if-indent
1650      'simula-inspect-indent
1651      'simula-electric-indent
1652      'simula-abbrev-keyword
1653      'simula-abbrev-stdproc
1654      'simula-abbrev-file
1655      'simula-tab-always-indent
1656      ))))
1657
1658 (provide 'simula)
1659
1660 ;; arch-tag: 488c1bb0-eebf-4f06-93df-1df603f06255
1661 ;;; simula.el ends here