;;; simula.el --- SIMULA 87 code editing commands for Emacs
-;; Copyright (C) 1992 Free Software Foundation, Inc.
+;; Copyright (C) 1992, 1994, 1996 Free Software Foundation, Inc.
;; Author: Hans Henrik Eriksen <hhe@ifi.uio.no>
;; Maintainer: simula-mode@ifi.uio.no
-;; Version: 0.992
;; Adapted-By: ESR
;; Keywords: languages
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
-(provide 'simula-mode)
+\f
+(defgroup simula nil
+ "Major mode for editing Simula code."
+ :prefix "simula-"
+ :group 'languages)
-(defconst simula-tab-always-indent nil
- "*Non-nil means TAB in SIMULA mode should always reindent the current line.
+(defconst simula-tab-always-indent-default nil
+ "Non-nil means TAB in SIMULA mode should always reindent the current line.
Otherwise TAB indents only when point is within
the run of whitespace at the beginning of the line.")
-(defconst simula-indent-level 3
- "*Indentation of SIMULA statements with respect to containing block.")
+(defcustom simula-tab-always-indent simula-tab-always-indent-default
+ "*Non-nil means TAB in SIMULA mode should always reindent the current line.
+Otherwise TAB indents only when point is within
+the run of whitespace at the beginning of the line."
+ :type 'boolean
+ :group 'simula)
-(defconst simula-substatement-offset 3
- "*Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE.")
+(defconst simula-indent-level-default 3
+ "Indentation of SIMULA statements with respect to containing block.")
-(defconst simula-continued-statement-offset 3
- "*Extra indentation for lines not starting a statement or substatement.
+(defcustom simula-indent-level simula-indent-level-default
+ "*Indentation of SIMULA statements with respect to containing block."
+ :type 'integer
+ :group 'simula)
+
+
+(defconst simula-substatement-offset-default 3
+ "Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE.")
+
+(defcustom simula-substatement-offset simula-substatement-offset-default
+ "*Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE."
+ :type 'integer
+ :group 'simula)
+
+(defconst simula-continued-statement-offset-default 3
+ "Extra indentation for lines not starting a statement or substatement.
If value is a list, each line in a multipleline continued statement
will have the car of the list extra indentation with respect to
the previous line of the statement.")
-(defconst simula-label-offset -4711
- "*Offset of SIMULA label lines relative to usual indentation.")
+(defcustom simula-continued-statement-offset
+ simula-continued-statement-offset-default
+ "*Extra indentation for lines not starting a statement or substatement.
+If value is a list, each line in a multipleline continued statement
+will have the car of the list extra indentation with respect to
+the previous line of the statement."
+ :type 'integer
+ :group 'simula)
-(defconst simula-if-indent '(0 . 0)
- "*Extra indentation of THEN and ELSE with respect to the starting IF.
+(defconst simula-label-offset-default -4711
+ "Offset of SIMULA label lines relative to usual indentation.")
+
+(defcustom simula-label-offset simula-label-offset-default
+ "*Offset of SIMULA label lines relative to usual indentation."
+ :type 'integer
+ :group 'simula)
+
+(defconst simula-if-indent-default '(0 . 0)
+ "Extra indentation of THEN and ELSE with respect to the starting IF.
Value is a cons cell, the car is extra THEN indentation and the cdr
extra ELSE indentation. IF after ELSE is indented as the starting IF.")
-(defconst simula-inspect-indent '(0 . 0)
- "*Extra indentation of WHEN and OTHERWISE with respect to the INSPECT.
+(defcustom simula-if-indent simula-if-indent-default
+ "*Extra indentation of THEN and ELSE with respect to the starting IF.
+Value is a cons cell, the car is extra THEN indentation and the cdr
+extra ELSE indentation. IF after ELSE is indented as the starting IF."
+ :type '(cons integer integer)
+ :group 'simula)
+
+(defconst simula-inspect-indent-default '(0 . 0)
+ "Extra indentation of WHEN and OTHERWISE with respect to the INSPECT.
Value is a cons cell, the car is extra WHEN indentation
and the cdr extra OTHERWISE indentation.")
-(defconst simula-electric-indent nil
- "*Non-nil means `simula-indent-line' function may reindent previous line.")
+(defcustom simula-inspect-indent simula-inspect-indent-default
+ "*Extra indentation of WHEN and OTHERWISE with respect to the INSPECT.
+Value is a cons cell, the car is extra WHEN indentation
+and the cdr extra OTHERWISE indentation."
+ :type '(cons integer integer)
+ :group 'simula)
+
+(defconst simula-electric-indent-default nil
+ "Non-nil means `simula-indent-line' function may reindent previous line.")
-(defconst simula-abbrev-keyword 'upcase
- "*Specify how to convert case for SIMULA keywords.
+(defcustom simula-electric-indent simula-electric-indent-default
+ "*Non-nil means `simula-indent-line' function may reindent previous line."
+ :type 'boolean
+ :group 'simula)
+
+(defconst simula-abbrev-keyword-default 'upcase
+ "Specify how to convert case for SIMULA keywords.
Value is one of the symbols `upcase', `downcase', `capitalize',
\(as in) `abbrev-table' or nil if they should not be changed.")
-(defconst simula-abbrev-stdproc 'abbrev-table
- "*Specify how to convert case for standard SIMULA procedure and class names.
+(defcustom simula-abbrev-keyword simula-abbrev-keyword-default
+ "*Specify how to convert case for SIMULA keywords.
+Value is one of the symbols `upcase', `downcase', `capitalize',
+\(as in) `abbrev-table' or nil if they should not be changed."
+ :type '(choice (const upcase) (const downcase) (const capitalize)(const nil))
+ :group 'simula)
+
+(defconst simula-abbrev-stdproc-default 'abbrev-table
+ "Specify how to convert case for standard SIMULA procedure and class names.
Value is one of the symbols `upcase', `downcase', `capitalize',
\(as in) `abbrev-table', or nil if they should not be changed.")
-(defvar simula-abbrev-file nil
+(defcustom simula-abbrev-stdproc simula-abbrev-stdproc-default
+ "*Specify how to convert case for standard SIMULA procedure and class names.
+Value is one of the symbols `upcase', `downcase', `capitalize',
+\(as in) `abbrev-table', or nil if they should not be changed."
+ :type '(choice (const upcase) (const downcase) (const capitalize)
+ (const abbrev-table) (const nil))
+ :group 'simula)
+
+(defcustom simula-abbrev-file nil
"*File with extra abbrev definitions for use in SIMULA mode.
These are used together with the standard abbrev definitions for SIMULA.
Please note that the standard definitions are required
-for SIMULA mode to function correctly.")
+for SIMULA mode to function correctly."
+ :type '(choice file (const nil))
+ :group 'simula)
(defvar simula-mode-syntax-table nil
"Syntax table in SIMULA mode buffers.")
+(defconst simula-font-lock-syntactic-keywords
+ `(;; `comment' directive.
+ ("\\<\\(c\\)omment\\>" 1 "<")
+ ;; end comments
+ (,(concat "\\<end\\>\\([^;\n]\\).*?\\(\n\\|\\(.\\)\\(;\\|"
+ (regexp-opt '("end" "else" "when" "otherwise"))
+ "\\)\\)")
+ (1 "< b")
+ (3 "> b" nil t))
+ ;; non-quoted single-quote char.
+ ("'\\('\\)'" 1 ".")))
+
+;; Regexps written with help from Alf-Ivar Holm <alfh@ifi.uio.no>.
+(defconst simula-font-lock-keywords-1
+ '(;;
+ ;; Compiler directives.
+ ("^%\\([^ \t\n].*\\)" 1 font-lock-constant-face t)
+ ;;
+ ;; Class and procedure names.
+ ("\\<\\(class\\|procedure\\)\\>[ \t]*\\(\\sw+\\)?"
+ (1 font-lock-keyword-face) (2 font-lock-function-name-face nil t)))
+ "Subdued level highlighting for Simula mode.")
+
+(defconst simula-font-lock-keywords-2
+ (append simula-font-lock-keywords-1
+ (list
+ ;;
+ ;; Constants.
+ '("\\<\\(false\\|none\\|notext\\|true\\)\\>" . font-lock-constant-face)
+ ;;
+ ;; Keywords.
+ (regexp-opt
+ '("activate" "after" "and" "at" "before" "begin" "delay" "do"
+ "else" "end" "eq" "eqv" "external" "for" "ge" "go" "goto" "gt"
+ "hidden" "if" "imp" "in" "inner" "inspect" "is" "label" "le"
+ "lt" "ne" "new" "not" "or" "otherwise" "prior" "protected"
+ "qua" "reactivate" "step" "switch" "then" "this" "to" "until"
+ "virtual" "when" "while") 'words)
+ ;;
+ ;; Types.
+ (cons (regexp-opt
+ '("array" "boolean" "character" "integer"
+ "long" "name" "real" "short" "text" "value" "ref") 'words)
+ 'font-lock-type-face)))
+ "Medium level highlighting for Simula mode.")
+
+(defconst simula-font-lock-keywords-3
+ (append simula-font-lock-keywords-2
+ (list
+ ;;
+ ;; Super-class names and super-slow.
+ '("\\<\\(\\sw+\\)[ \t]+class\\>" 1 font-lock-function-name-face)
+ ;;
+ ;; Types and their declarations.
+ (list (concat "\\<\\(array\\|boolean\\|character\\|integer\\|"
+ "long\\|name\\|real\\|short\\|text\\|value\\)\\>"
+ "\\([ \t]+\\sw+\\>\\)*")
+ '(font-lock-match-c-style-declaration-item-and-skip-to-next
+ ;; Start with point after all type specifiers.
+ (goto-char (or (match-beginning 2) (match-end 1)))
+ ;; Finish with point after first type specifier.
+ (goto-char (match-end 1))
+ ;; Fontify as a variable name.
+ (1 font-lock-variable-name-face)))
+ ;;
+ ;; Object references and their declarations.
+ '("\\<\\(ref\\)\\>[ \t]*\\((\\(\\sw+\\))\\)?"
+ (3 font-lock-function-name-face nil t)
+ (font-lock-match-c-style-declaration-item-and-skip-to-next nil nil
+ (1 font-lock-variable-name-face)))
+ ))
+ "Gaudy level highlighting for Simula mode.")
+
+(defvar simula-font-lock-keywords simula-font-lock-keywords-1
+ "Default expressions to highlight in Simula mode.")
+
+; The following function is taken from cc-mode.el,
+; it determines the flavor of the Emacs running
+
+(defvar simula-mode-menu
+ '(["Report Bug" simula-submit-bug-report t]
+ ["Indent Line" simula-indent-line t]
+ ["Backward Statement" simula-previous-statement t]
+ ["Forward Statement" simula-next-statement t]
+ ["Backward Up Level" simula-backward-up-level t]
+ ["Forward Down Statement" simula-forward-down-level t])
+ "Lucid Emacs menu for SIMULA mode.")
+
(if simula-mode-syntax-table
()
(setq simula-mode-syntax-table (copy-syntax-table (standard-syntax-table)))
(modify-syntax-entry ?! "<" simula-mode-syntax-table)
(modify-syntax-entry ?$ "." simula-mode-syntax-table)
- (modify-syntax-entry ?% "." simula-mode-syntax-table)
+ (modify-syntax-entry ?% "< b" simula-mode-syntax-table)
+ (modify-syntax-entry ?\n "> b" simula-mode-syntax-table)
(modify-syntax-entry ?' "\"" simula-mode-syntax-table)
(modify-syntax-entry ?\( "()" simula-mode-syntax-table)
(modify-syntax-entry ?\) ")(" simula-mode-syntax-table)
(modify-syntax-entry ?\[ "." simula-mode-syntax-table)
(modify-syntax-entry ?\\ "." simula-mode-syntax-table)
(modify-syntax-entry ?\] "." simula-mode-syntax-table)
- (modify-syntax-entry ?_ "w" simula-mode-syntax-table)
+ (modify-syntax-entry ?_ "_" simula-mode-syntax-table)
(modify-syntax-entry ?\| "." simula-mode-syntax-table)
(modify-syntax-entry ?\{ "." simula-mode-syntax-table)
(modify-syntax-entry ?\} "." simula-mode-syntax-table))
-(defvar simula-mode-map ()
- "Keymap used in SIMULA mode.")
-
-(if simula-mode-map
- ()
- (setq simula-mode-map (make-sparse-keymap))
- (define-key simula-mode-map "\C-c\C-u" 'simula-backward-up-level)
- (define-key simula-mode-map "\C-c\C-p" 'simula-previous-statement)
- (define-key simula-mode-map "\C-c\C-d" 'simula-forward-down-level)
- (define-key simula-mode-map "\C-c\C-n" 'simula-next-statement)
- ;(define-key simula-mode-map "\C-c\C-g" 'simula-goto-definition)
- ;(define-key simula-mode-map "\C-c\C-h" 'simula-standard-help)
- (define-key simula-mode-map "\177" 'backward-delete-char-untabify)
- (define-key simula-mode-map ":" 'simula-electric-label)
- (define-key simula-mode-map "\t" 'simula-indent-command))
-
-(defvar simula-mode-abbrev-table nil
- "Abbrev table in SIMULA mode buffers")
-
-
-(defun simula-mode ()
+(defvar simula-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map "\C-c\C-u" 'simula-backward-up-level)
+ (define-key map "\C-c\C-p" 'simula-previous-statement)
+ (define-key map "\C-c\C-d" 'simula-forward-down-level)
+ (define-key map "\C-c\C-n" 'simula-next-statement)
+ ;; (define-key map "\C-c\C-g" 'simula-goto-definition)
+ ;; (define-key map "\C-c\C-h" 'simula-standard-help)
+ (define-key map "\177" 'backward-delete-char-untabify)
+ (define-key map ":" 'simula-electric-label)
+ (define-key map "\e\C-q" 'simula-indent-exp)
+ (define-key map "\t" 'simula-indent-command)
+ ;; Emacs 19 defines menus in the mode map
+ (define-key map [menu-bar simula]
+ (cons "SIMULA" (make-sparse-keymap "SIMULA")))
+ (define-key map [menu-bar simula bug-report]
+ '("Submit Bug Report" . simula-submit-bug-report))
+ (define-key map [menu-bar simula separator-indent]
+ '("--"))
+ (define-key map [menu-bar simula indent-exp]
+ '("Indent Expression" . simula-indent-exp))
+ (define-key map [menu-bar simula indent-line]
+ '("Indent Line" . simula-indent-command))
+ (define-key map [menu-bar simula separator-navigate]
+ '("--"))
+ (define-key map [menu-bar simula backward-stmt]
+ '("Previous Statement" . simula-previous-statement))
+ (define-key map [menu-bar simula forward-stmt]
+ '("Next Statement" . simula-next-statement))
+ (define-key map [menu-bar simula backward-up]
+ '("Backward Up Level" . simula-backward-up-level))
+ (define-key map [menu-bar simula forward-down]
+ '("Forward Down Statement" . simula-forward-down-level))
+
+ (put 'simula-next-statement 'menu-enable '(not (eobp)))
+ (put 'simula-previous-statement 'menu-enable '(not (bobp)))
+ (put 'simula-forward-down-level 'menu-enable '(not (eobp)))
+ (put 'simula-backward-up-level 'menu-enable '(not (bobp)))
+ (put 'simula-indent-command 'menu-enable '(not buffer-read-only))
+ (put 'simula-indent-exp 'menu-enable '(not buffer-read-only))
+
+ ;; RMS: mouse-3 should not select this menu. mouse-3's global
+ ;; definition is useful in SIMULA mode and we should not interfere
+ ;; with that. The menu is mainly for beginners, and for them,
+ ;; the menubar requires less memory than a special click.
+ ;; in Lucid Emacs, we want the menu to popup when the 3rd button is
+ ;; hit. In 19.10 and beyond this is done automatically if we put
+ ;; the menu on mode-popup-menu variable, see c-common-init [cc-mode.el]
+ ;;(if (not (boundp 'mode-popup-menu))
+ ;; (define-key simula-mode-map 'button3 'simula-popup-menu))
+ map)
+ "Keymap used in `simula-mode'.")
+
+;; menus for Lucid
+(defun simula-popup-menu (e)
+ "Pops up the SIMULA menu."
+ (interactive "@e")
+ (popup-menu (cons (concat mode-name " Mode Commands") simula-mode-menu)))
+
+;;;###autoload
+(define-derived-mode simula-mode nil "Simula"
"Major mode for editing SIMULA code.
\\{simula-mode-map}
Variables controlling indentation style:
- simula-tab-always-indent
+ `simula-tab-always-indent'
Non-nil means TAB in SIMULA mode should always reindent the current line,
regardless of where in the line point is when the TAB command is used.
- simula-indent-level
+ `simula-indent-level'
Indentation of SIMULA statements with respect to containing block.
- simula-substatement-offset
+ `simula-substatement-offset'
Extra indentation after DO, THEN, ELSE, WHEN and OTHERWISE.
- simula-continued-statement-offset 3
+ `simula-continued-statement-offset' 3
Extra indentation for lines not starting a statement or substatement,
e.g. a nested FOR-loop. If value is a list, each line in a multiple-
line continued statement will have the car of the list extra indentation
with respect to the previous line of the statement.
- simula-label-offset -4711
+ `simula-label-offset' -4711
Offset of SIMULA label lines relative to usual indentation.
- simula-if-indent '(0 . 0)
+ `simula-if-indent' '(0 . 0)
Extra indentation of THEN and ELSE with respect to the starting IF.
Value is a cons cell, the car is extra THEN indentation and the cdr
extra ELSE indentation. IF after ELSE is indented as the starting IF.
- simula-inspect-indent '(0 . 0)
+ `simula-inspect-indent' '(0 . 0)
Extra indentation of WHEN and OTHERWISE with respect to the
corresponding INSPECT. Value is a cons cell, the car is
extra WHEN indentation and the cdr extra OTHERWISE indentation.
- simula-electric-indent nil
+ `simula-electric-indent' nil
If this variable is non-nil, `simula-indent-line'
will check the previous line to see if it has to be reindented.
- simula-abbrev-keyword 'upcase
+ `simula-abbrev-keyword' 'upcase
Determine how SIMULA keywords will be expanded. Value is one of
the symbols `upcase', `downcase', `capitalize', (as in) `abbrev-table',
or nil if they should not be changed.
- simula-abbrev-stdproc 'abbrev-table
+ `simula-abbrev-stdproc' 'abbrev-table
Determine how standard SIMULA procedure and class names will be
expanded. Value is one of the symbols `upcase', `downcase', `capitalize',
(as in) `abbrev-table', or nil if they should not be changed.
Turning on SIMULA mode calls the value of the variable simula-mode-hook
-with no arguments, if that value is non-nil
-
-Warning: simula-mode-hook should not read in an abbrev file without calling
-the function simula-install-standard-abbrevs afterwards, preferably not
-at all."
- (interactive)
- (kill-all-local-variables)
- (use-local-map simula-mode-map)
- (setq major-mode 'simula-mode)
- (setq mode-name "SIMULA")
+with no arguments, if that value is non-nil."
(make-local-variable 'comment-column)
(setq comment-column 40)
- (make-local-variable 'end-comment-column)
- (setq end-comment-column 75)
- (set-syntax-table simula-mode-syntax-table)
+; (make-local-variable 'end-comment-column)
+; (setq end-comment-column 75)
(make-local-variable 'paragraph-start)
(setq paragraph-start "[ \t]*$\\|\\f")
(make-local-variable 'paragraph-separate)
(make-local-variable 'indent-line-function)
(setq indent-line-function 'simula-indent-line)
(make-local-variable 'require-final-newline)
- (setq require-final-newline t)
+ (setq require-final-newline mode-require-final-newline)
(make-local-variable 'comment-start)
(setq comment-start "! ")
(make-local-variable 'comment-end)
(setq parse-sexp-ignore-comments nil)
(make-local-variable 'comment-multi-line)
(setq comment-multi-line t)
- (if simula-mode-abbrev-table
- ()
- (if simula-abbrev-file
- (read-abbrev-file simula-abbrev-file)
- (define-abbrev-table 'simula-mode-abbrev-table ()))
- (let (abbrevs-changed)
- (simula-install-standard-abbrevs)))
- (setq local-abbrev-table simula-mode-abbrev-table)
- (abbrev-mode 1)
- (run-hooks 'simula-mode-hook))
-
+ (make-local-variable 'font-lock-defaults)
+ (setq font-lock-defaults
+ '((simula-font-lock-keywords simula-font-lock-keywords-1
+ simula-font-lock-keywords-2 simula-font-lock-keywords-3)
+ nil t ((?_ . "w")) nil
+ (font-lock-syntactic-keywords . simula-font-lock-syntactic-keywords)))
+ (abbrev-mode 1))
+
+(defun simula-indent-exp ()
+ "Indent SIMULA expression following point."
+ (interactive)
+ (let ((here (point))
+ (simula-electric-indent nil)
+ end)
+ (simula-skip-comment-forward)
+ (if (eobp)
+ (goto-char here)
+ (unwind-protect
+ (progn
+ (simula-next-statement 1)
+ (setq end (point-marker))
+ (simula-previous-statement 1)
+ (beginning-of-line)
+ (while (< (point) end)
+ (if (not (looking-at "[ \t]*$"))
+ (simula-indent-line))
+ (forward-line 1)))
+ (and end (set-marker end nil))))))
(defun simula-indent-line ()
(indent (simula-calculate-indent))
(case-fold-search t))
(unwind-protect
- (progn
- ;;
- ;; manually expand abbrev on last line, if any
- ;;
- (end-of-line 0)
- (expand-abbrev)
- ;; now maybe we should reindent that line
- (if simula-electric-indent
- (progn
- (beginning-of-line)
- (skip-chars-forward " \t\f")
- (if (and
- (looking-at
- "\\(end\\|if\\|then\\|else\\|when\\|otherwise\\)\\>")
- (not (simula-context)))
- ;; yes - reindent
- (let ((post-indent (simula-calculate-indent)))
- (if (eq (current-indentation) post-indent)
- ()
- (delete-horizontal-space)
- (indent-to post-indent)))))))
+ (if simula-electric-indent
+ (progn
+ ;;
+ ;; manually expand abbrev on last line, if any
+ ;;
+ (end-of-line 0)
+ (expand-abbrev)
+ ;; now maybe we should reindent that line
+ (beginning-of-line)
+ (skip-chars-forward " \t\f")
+ (if (and
+ (looking-at
+ "\\(end\\|if\\|then\\|else\\|when\\|otherwise\\)\\>")
+ (not (simula-context)))
+ ;; yes - reindent
+ (let ((post-indent (simula-calculate-indent)))
+ (if (eq (current-indentation) post-indent)
+ ()
+ (delete-horizontal-space)
+ (indent-to post-indent))))))
(goto-char (- (point-max) origin))
(if (eq (current-indentation) indent)
(back-to-indentation)
(defun simula-context ()
- "Returns value according to syntactic SIMULA context of point.
+ "Return value according to syntactic SIMULA context of point.
0 point inside COMMENT comment
1 point on SIMULA-compiler directive line
2 point inside END comment
(cond
((memq (preceding-char) '(?d ?D))
(setq return-value 2)
- (while (and (memq (preceding-char) '(?d ?D)) (not return-value))
- (while (and (re-search-forward
- ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>\\|^%"
- origin 'move)
- (eq (preceding-char) ?%))
- (beginning-of-line 2)))
- (if (looking-at "[ \t\n\f]*\\(;\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>\\)")
- (setq return-value nil)))
+ (while (and (re-search-forward
+ ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>\\|^%"
+ origin 'move)
+ ;; found another END?
+ (or (memq (preceding-char) '(?d ?D))
+ ;; if directive, skip line
+ (and (eq (preceding-char) ?%)
+ (beginning-of-line 2))
+ ;; found other keyword, out of END comment
+ (setq return-value nil))))
+ (if (and (eq (char-syntax (preceding-char)) ?w)
+ (eq (char-syntax (following-char)) ?w))
+ (save-excursion
+ (backward-word 1)
+ (if (looking-at "end\\>\\|else\\>\\|otherwise\\>\\|when\\>")
+ (setq return-value nil)))))
((memq (preceding-char) '(?! ?t ?T))
; skip comment
(setq return-value 0)
(let ((origin (- (point-max) (point)))
(case-fold-search t)
;; don't mix a label with an assignment operator := :-
- ;; therefore look at next typed character...
- (next-char (setq unread-command-events (list (read-event))))
- (com-char last-command-char))
+ ;; therefore take a peek at next typed character...
+ (next-char (read-event)))
(unwind-protect
+ (setq unread-command-events (append unread-command-events
+ (list next-char)))
;; Problem: find out if character just read is a command char
;; that would insert something after ':' making it a label.
;; At least \n, \r (and maybe \t) falls into this category.
(delete-horizontal-space)
(indent-to amount)))
(goto-char (- (point-max) origin)))))
-
+
(defun simula-backward-up-level (count)
"Move backward up COUNT block levels.
(goto-char origin)
(signal 'quit nil))))))
-
+
(defun simula-previous-statement (count)
"Move backward COUNT statements.
If COUNT is negative, move forward instead."
(case-fold-search t)
(origin (point)))
(condition-case ()
+ ;;
(progn
(simula-skip-comment-backward)
(if (memq (preceding-char) '(?n ?N))
(if (not (looking-at "\\<begin\\>"))
(backward-word -1)))
(if (eq (preceding-char) ?\;)
- (backward-char 1)))
+ (backward-char 1))
+ )
(while (and (natnump (setq count (1- count)))
(setq status (simula-search-backward
";\\|\\<begin\\>" nil 'move))))
(quit (progn (goto-char origin) (signal 'quit nil)))))))
-(defun simula-skip-comment-backward ()
+(defun simula-skip-comment-backward (&optional stop-at-end)
"Search towards bob to find first char that is outside a comment."
(interactive)
(catch 'simula-out
(if (eq (preceding-char) ?\;)
(save-excursion
(backward-char 1)
- (setq context (simula-context)))
+ (setq context (simula-context))
+ (if (and stop-at-end (eq context 2))
+ (setq context nil)))
(setq context (simula-context)))
(cond
((memq context '(nil 3 4))
(while (and (re-search-backward "!\\|\\<comment\\>")
(memq (simula-context) '(0 1)))))
((eq context 1)
- (end-of-line 0)
+ (beginning-of-line)
(if (bobp)
- (throw 'simula-out nil)))
+ (throw 'simula-out nil)
+ (backward-char)))
((eq context 2)
;; an END-comment must belong to an END
(re-search-backward "\\<end\\>")
(catch 'simula-out
(while t
(skip-chars-forward " \t\n\f")
+ ;; BUG: the following (0 2) branches don't take into account intermixing
+ ;; directive lines
(cond
((looking-at "!\\|\\<comment\\>")
(search-forward ";" nil 'move))
(prog1
(current-column)
(goto-char origin)))
+ ((eq where 1)
+ ;;
+ ;; Directive. Always 0.
+ ;;
+ 0)
;;
;; Detect missing string delimiters
;;
(looking-at "[a-z0-9_]*[ \t\f]*:[^-=]"))
(setq indent simula-label-offset)))
;; find line with non-comment text
- (simula-skip-comment-backward)
+ (simula-skip-comment-backward 'dont-skip-end)
(if (and found-end
(not (eq (preceding-char) ?\;))
(if (memq (preceding-char) '(?N ?n))
;; (at or before comment or label)
;; temp = t means finished
(setq temp
- (and (not (simula-context))
+ (and (not (simula-context))
(save-excursion
(skip-chars-forward " \t\f")
(or (looking-at "virtual")
(defun simula-find-do-match ()
- "Find keyword matching DO: FOR, WHILE, INSPECT or WHEN"
+ "Find keyword matching DO: FOR, WHILE, INSPECT or WHEN."
(while (and (re-search-backward
"\\<\\(do\\|for\\|while\\|inspect\\|when\\|end\\|begin\\)\\>\\|;"
nil 'move)
(cond
((eq simula-abbrev-stdproc 'upcase) (upcase-word -1))
((eq simula-abbrev-stdproc 'downcase) (downcase-word -1))
- ((eq simula-abbrev-stdproc 'capitalize) (capitalize-word -1)))))
+ ((eq simula-abbrev-stdproc 'capitalize) (capitalize-word -1))
+ ((eq simula-abbrev-stdproc 'abbrev-table)
+ ;; If not in lowercase, expansions are always capitalized.
+ ;; We then want to replace with the exact expansion.
+ (if (equal (symbol-name last-abbrev) last-abbrev-text)
+ ()
+ (downcase-word -1)
+ (expand-abbrev))))))
(defun simula-expand-keyword ()
(cond
((eq simula-abbrev-keyword 'upcase) (upcase-word -1))
((eq simula-abbrev-keyword 'downcase) (downcase-word -1))
- ((eq simula-abbrev-keyword 'capitalize) (capitalize-word -1)))))
+ ((eq simula-abbrev-keyword 'capitalize) (capitalize-word -1))
+ ((eq simula-abbrev-stdproc 'abbrev-table)
+ (if (equal (symbol-name last-abbrev) last-abbrev-text)
+ ()
+ (downcase-word -1)
+ (expand-abbrev))))))
(defun simula-electric-keyword ()
(simula-backward-up-level 1)
(if (pos-visible-in-window-p)
(sit-for 1)
- (message
- (concat "Matches "
+ (message "Matches %s"
(buffer-substring
(point)
- (+ (point) (window-width))))))))
+ (+ (point) (window-width)))))))
(skip-chars-backward " \t\f")
(bolp)))
(let ((indent (simula-calculate-indent)))
(quit (goto-char (- (point-max) pos))))))))
-(defun simula-search-backward (string &optional limit move)
- (setq string (concat string "\\|\\<end\\>"))
- (let (level)
- (catch 'simula-out
- (while (re-search-backward string limit move)
- (if (simula-context)
- ()
- (if (looking-at "\\<end\\>")
- (progn
- (setq level 0)
- (while (natnump level)
- (re-search-backward "\\<begin\\>\\|\\<end\\>")
- (if (simula-context)
- ()
- (setq level (if (memq (following-char) '(?b ?B))
- (1- level)
- (1+ level))))))
- (throw 'simula-out t)))))))
-
-
-(defun simula-search-forward (string &optional limit move)
- (setq string (concat string "\\|\\<begin\\>"))
- (let (level)
- (catch 'exit
- (while (re-search-forward string limit move)
- (goto-char (match-beginning 0))
- (if (simula-context)
- (goto-char (1- (match-end 0)))
- (if (looking-at "\\<begin\\>")
- (progn
- (goto-char (1- (match-end 0)))
- (setq level 0)
- (while (natnump level)
- (re-search-forward "\\<begin\\>\\|\\<end\\>")
- (backward-word 1)
- (if (not (simula-context))
- (setq level (if (memq (following-char) '(?e ?E))
- (1- level)
- (1+ level))))
- (backward-word -1)))
- (goto-char (1- (match-end 0)))
- (throw 'exit t)))))))
-
-
+(defun simula-search-backward (regexp &optional bound noerror)
+ "Search backward from point for regular expression REGEXP,
+ignoring matches found inside SIMULA comments, string literals,
+and BEGIN..END blocks.
+Set point to the end of the occurrence found, and return point.
+An optional second argument BOUND bounds the search, it is a buffer position.
+The match found must not extend after that position. Optional third argument
+NOERROR, if t, means if fail just return nil (no error).
+If not nil and not t, move to limit of search and return nil."
+ (let (begin end context (comb-regexp (concat regexp "\\|\\<end\\>"))
+ match (start-point (point)))
+ (catch 'simula-backward
+ (while (re-search-backward comb-regexp bound 1)
+ ;; We have a match, check SIMULA context at match-beginning
+ ;; to see if we are outside comments etc.
+ ;; Set MATCH to t if we found a true match,
+ ;; set MATCH to 'BLOCK if we found a BEGIN..END block,
+ ;; else set MATCH to nil.
+ (save-match-data
+ (setq context (simula-context))
+ (cond
+ ((eq context nil)
+ (setq match (if (looking-at regexp) t 'BLOCK)))
+ ;; A comment-ending `;' is part of the comment, and shouldn't match.
+ ;; ((eq context 0)
+ ;; (setq match (if (eq (following-char) ?\;) t nil)))
+ ((eq context 2)
+ (setq match (if (and (looking-at regexp)
+ (looking-at ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>"))
+ t
+ (if (looking-at "\\<end\\>") 'BLOCK nil))))
+ (t (setq match nil))))
+ ;; Exit if true match
+ (if (eq match t) (throw 'simula-backward (point)))
+ (if (eq match 'BLOCK)
+ ;; We found the END of a block
+ (let ((level 0))
+ (while (natnump level)
+ (if (re-search-backward "\\<begin\\>\\|\\<end\\>" bound 1)
+ (let ((context (simula-context)))
+ ;; We found a BEGIN -> decrease level count
+ (cond ((and (eq context nil)
+ (memq (following-char) '(?b ?B)))
+ (setq level (1- level)))
+ ;; END -> increase level count
+ ((and (memq context '(nil 2))
+ (memq (following-char) '(?e ?E)))
+ (setq level (1+ level)))))
+ ;; Block search failed. Action depends on noerror.
+ (if (or (not noerror) (eq noerror t))
+ (goto-char start-point))
+ (if (not noerror)
+ (signal 'search-failed (list regexp)))
+ (throw 'simula-backward nil))))))
+ ;; Search failed. Action depends on noerror.
+ (if (or (not noerror) (eq noerror t))
+ (goto-char start-point))
+ (if noerror
+ nil
+ (signal 'search-failed (list regexp))))))
+
+
+(defun simula-search-forward (regexp &optional bound noerror)
+ "Search forward from point for regular expression REGEXP,
+ignoring matches found inside SIMULA comments, string literals,
+and BEGIN..END blocks.
+Set point to the end of the occurrence found, and return point.
+An optional second argument BOUND bounds the search, it is a buffer position.
+The match found must not extend after that position. Optional third argument
+NOERROR, if t, means if fail just return nil (no error).
+If not nil and not t, move to limit of search and return nil."
+ (let (begin end context (comb-regexp (concat regexp "\\|\\<begin\\>"))
+ match (start-point (point)))
+ (catch 'simula-forward
+ (while (re-search-forward comb-regexp bound 1)
+ ;; We have a match, check SIMULA context at match-beginning
+ ;; to see if we are outside comments.
+ ;; Set MATCH to t if we found a true match,
+ ;; set MATCH to 'BLOCK if we found a BEGIN..END block,
+ ;; else set MATCH to nil.
+ (save-match-data
+ (save-excursion
+ (goto-char (match-beginning 0))
+ (setq context (simula-context))
+ (cond
+ ((not context)
+ (setq match (if (looking-at regexp) t 'BLOCK)))
+ ;; Comment-ending `;' is part of the comment, and shouldn't match.
+ ;; ((eq context 0)
+ ;; (setq match (if (eq (following-char) ?\;) t nil)))
+ ((eq context 2)
+ (setq match (if (and (looking-at regexp)
+ (looking-at ";\\|\\<end\\>\\|\\<else\\>\\|\\<otherwise\\>\\|\\<when\\>")) t nil)))
+ (t (setq match nil)))))
+ ;; Exit if true match
+ (if (eq match t) (throw 'simula-forward (point)))
+ (if (eq match 'BLOCK)
+ ;; We found the BEGINning of a block
+ (let ((level 0))
+ (while (natnump level)
+ (if (re-search-forward "\\<begin\\>\\|\\<end\\>" bound 1)
+ (let ((context (simula-context)))
+ ;; We found a BEGIN -> increase level count
+ (cond ((eq context nil) (setq level (1+ level)))
+ ;; END -> decrease level count
+ ((and (eq context 2)
+ ;; Don't match BEGIN inside END comment
+ (memq (preceding-char) '(?d ?D)))
+ (setq level (1- level)))))
+ ;; Block search failed. Action depends on noerror.
+ (if (or (not noerror) (eq noerror t))
+ (goto-char start-point))
+ (if (not noerror)
+ (signal 'search-failed (list regexp)))
+ (throw 'simula-forward nil))))))
+ ;; Search failed. Action depends on noerror.
+ (if (or (not noerror) (eq noerror t))
+ (goto-char start-point))
+ (if noerror
+ nil
+ (signal 'search-failed (list regexp))))))
+
+
(defun simula-install-standard-abbrevs ()
"Define Simula keywords, procedures and classes in local abbrev table."
;; procedure and class names are as of the SIMULA 87 standard.
(interactive)
- (mapcar (function (lambda (args)
- (apply 'define-abbrev simula-mode-abbrev-table args)))
+ (dolist (args
'(("abs" "Abs" simula-expand-stdproc)
("accum" "Accum" simula-expand-stdproc)
("activate" "ACTIVATE" simula-expand-keyword)
("virtual" "VIRTUAL" simula-expand-keyword)
("wait" "Wait" simula-expand-stdproc)
("when" "WHEN" simula-electric-keyword)
- ("while" "WHILE" simula-expand-keyword))))
-
+ ("while" "WHILE" simula-expand-keyword)))
+ (define-abbrev simula-mode-abbrev-table
+ (nth 0 args) (nth 1 args) (nth 2 args) nil 'system)))
+
+(if simula-abbrev-file
+ (read-abbrev-file simula-abbrev-file))
+(let (abbrevs-changed)
+ (simula-install-standard-abbrevs))
+
+;; Hilit mode support.
+(if (and (fboundp 'hilit-set-mode-patterns)
+ (boundp 'hilit-patterns-alist)
+ (not (assoc 'simula-mode hilit-patterns-alist)))
+ (hilit-set-mode-patterns
+ 'simula-mode
+ '(
+ ("^%\\([ \t\f].*\\)?$" nil comment)
+ ("^%include\\>" nil include)
+ ("\"[^\"\n]*\"\\|'.'\\|'![0-9]+!'" nil string)
+ ("\\<\\(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)
+ ("!\\|\\<COMMENT\\>" ";" comment))
+ nil 'case-insensitive))
+\f
+;; defuns for submitting bug reports
+
+(defconst simula-mode-help-address "simula-mode@ifi.uio.no"
+ "Address accepting submission of `simula-mode' bug reports.")
+
+(defun simula-submit-bug-report ()
+ "Submit via mail a bug report on `simula-mode'."
+ (interactive)
+ (and
+ (y-or-n-p "Do you want to submit a report on simula-mode? ")
+ (reporter-submit-bug-report
+ simula-mode-help-address
+ (concat "simula-mode from Emacs " emacs-version)
+ (list
+ ;; report only the vars that affect indentation
+ 'simula-indent-level
+ 'simula-substatement-offset
+ 'simula-continued-statement-offset
+ 'simula-label-offset
+ 'simula-if-indent
+ 'simula-inspect-indent
+ 'simula-electric-indent
+ 'simula-abbrev-keyword
+ 'simula-abbrev-stdproc
+ 'simula-abbrev-file
+ 'simula-tab-always-indent
+ ))))
+
+(provide 'simula)
+
+;;; arch-tag: 488c1bb0-eebf-4f06-93df-1df603f06255
;;; simula.el ends here
HCoop / bpt / emacs.git / blobdiff