1 ;;; pascal.el --- major mode for editing pascal source in Emacs
3 ;; Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002
4 ;; 2003, 2004, 2005 Free Software Foundation, Inc.
6 ;; Author: Espen Skoglund <esk@gnu.org>
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to
23 ;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
31 ;; Emacs should enter Pascal mode when you find a Pascal source file.
32 ;; When you have entered Pascal mode, you may get more info by pressing
33 ;; C-h m. You may also get online help describing various functions by:
34 ;; C-h f <Name of function you want described>
36 ;; If you want to customize Pascal mode to fit you better, you may add
37 ;; these lines (the values of the variables presented here are the defaults):
39 ;; ;; User customization for Pascal mode
40 ;; (setq pascal-indent-level 3
41 ;; pascal-case-indent 2
42 ;; pascal-auto-newline nil
43 ;; pascal-tab-always-indent t
44 ;; pascal-auto-endcomments t
45 ;; pascal-auto-lineup '(all)
46 ;; pascal-toggle-completions nil
47 ;; pascal-type-keywords '("array" "file" "packed" "char"
48 ;; "integer" "real" "string" "record")
49 ;; pascal-start-keywords '("begin" "end" "function" "procedure"
50 ;; "repeat" "until" "while" "read" "readln"
51 ;; "reset" "rewrite" "write" "writeln")
52 ;; pascal-separator-keywords '("downto" "else" "mod" "div" "then"))
54 ;; KNOWN BUGS / BUGREPORTS
55 ;; =======================
56 ;; As far as I know, there are no bugs in the current version of this
57 ;; package. This may not be true however, since I never use this mode
58 ;; myself and therefore would never notice them anyway. If you do
59 ;; find any bugs, you may submit them to: esk@gnu.org as well as to
60 ;; bug-gnu-emacs@gnu.org.
65 "Major mode for editing Pascal source in Emacs."
68 (defvar pascal-mode-abbrev-table nil
69 "Abbrev table in use in Pascal-mode buffers.")
70 (define-abbrev-table 'pascal-mode-abbrev-table ())
72 (defvar pascal-mode-map ()
73 "Keymap used in Pascal mode.")
76 (setq pascal-mode-map (make-sparse-keymap))
77 (define-key pascal-mode-map ";" 'electric-pascal-semi-or-dot)
78 (define-key pascal-mode-map "." 'electric-pascal-semi-or-dot)
79 (define-key pascal-mode-map ":" 'electric-pascal-colon)
80 (define-key pascal-mode-map "=" 'electric-pascal-equal)
81 (define-key pascal-mode-map "#" 'electric-pascal-hash)
82 (define-key pascal-mode-map "\r" 'electric-pascal-terminate-line)
83 (define-key pascal-mode-map "\t" 'electric-pascal-tab)
84 (define-key pascal-mode-map "\M-\t" 'pascal-complete-word)
85 (define-key pascal-mode-map "\M-?" 'pascal-show-completions)
86 (define-key pascal-mode-map "\177" 'backward-delete-char-untabify)
87 (define-key pascal-mode-map "\M-\C-h" 'pascal-mark-defun)
88 (define-key pascal-mode-map "\C-c\C-b" 'pascal-insert-block)
89 (define-key pascal-mode-map "\M-*" 'pascal-star-comment)
90 (define-key pascal-mode-map "\C-c\C-c" 'pascal-comment-area)
91 (define-key pascal-mode-map "\C-c\C-u" 'pascal-uncomment-area)
92 (define-key pascal-mode-map "\M-\C-a" 'pascal-beg-of-defun)
93 (define-key pascal-mode-map "\M-\C-e" 'pascal-end-of-defun)
94 (define-key pascal-mode-map "\C-c\C-d" 'pascal-goto-defun)
95 (define-key pascal-mode-map "\C-c\C-o" 'pascal-outline)
96 ;;; A command to change the whole buffer won't be used terribly
97 ;;; often, so no need for a key binding.
98 ; (define-key pascal-mode-map "\C-cd" 'pascal-downcase-keywords)
99 ; (define-key pascal-mode-map "\C-cu" 'pascal-upcase-keywords)
100 ; (define-key pascal-mode-map "\C-cc" 'pascal-capitalize-keywords)
103 (defvar pascal-imenu-generic-expression
104 '((nil "^[ \t]*\\(function\\|procedure\\)[ \t\n]+\\([a-zA-Z0-9_.:]+\\)" 2))
105 "Imenu expression for Pascal-mode. See `imenu-generic-expression'.")
107 (defvar pascal-keywords
108 '("and" "array" "begin" "case" "const" "div" "do" "downto" "else" "end"
109 "file" "for" "function" "goto" "if" "in" "label" "mod" "nil" "not" "of"
110 "or" "packed" "procedure" "program" "record" "repeat" "set" "then" "to"
111 "type" "until" "var" "while" "with"
112 ;; The following are not standard in pascal, but widely used.
113 "get" "put" "input" "output" "read" "readln" "reset" "rewrite" "write"
117 ;;; Regular expressions used to calculate indent, etc.
119 (defconst pascal-symbol-re "\\<[a-zA-Z_][a-zA-Z_0-9.]*\\>")
120 (defconst pascal-beg-block-re "\\<\\(begin\\|case\\|record\\|repeat\\)\\>")
121 (defconst pascal-end-block-re "\\<\\(end\\|until\\)\\>")
122 (defconst pascal-declaration-re "\\<\\(const\\|label\\|type\\|var\\)\\>")
123 (defconst pascal-progbeg-re "\\<\\program\\>")
124 (defconst pascal-defun-re "\\<\\(function\\|procedure\\|program\\)\\>")
125 (defconst pascal-sub-block-re "\\<\\(if\\|else\\|for\\|while\\|with\\)\\>")
126 (defconst pascal-noindent-re "\\<\\(begin\\|end\\|until\\|else\\)\\>")
127 (defconst pascal-nosemi-re "\\<\\(begin\\|repeat\\|then\\|do\\|else\\)\\>")
128 (defconst pascal-autoindent-lines-re
129 "\\<\\(label\\|var\\|type\\|const\\|until\\|end\\|begin\\|repeat\\|else\\)\\>")
131 ;;; Strings used to mark beginning and end of excluded text
132 (defconst pascal-exclude-str-start "{-----\\/----- EXCLUDED -----\\/-----")
133 (defconst pascal-exclude-str-end " -----/\\----- EXCLUDED -----/\\-----}")
135 (defvar pascal-mode-syntax-table nil
136 "Syntax table in use in Pascal-mode buffers.")
138 (if pascal-mode-syntax-table
140 (setq pascal-mode-syntax-table (make-syntax-table))
141 (modify-syntax-entry ?\\ "." pascal-mode-syntax-table)
142 (modify-syntax-entry ?( "()1" pascal-mode-syntax-table)
143 (modify-syntax-entry ?) ")(4" pascal-mode-syntax-table)
144 (modify-syntax-entry ?* ". 23b" pascal-mode-syntax-table)
145 (modify-syntax-entry ?{ "<" pascal-mode-syntax-table)
146 (modify-syntax-entry ?} ">" pascal-mode-syntax-table)
147 (modify-syntax-entry ?+ "." pascal-mode-syntax-table)
148 (modify-syntax-entry ?- "." pascal-mode-syntax-table)
149 (modify-syntax-entry ?= "." pascal-mode-syntax-table)
150 (modify-syntax-entry ?% "." pascal-mode-syntax-table)
151 (modify-syntax-entry ?< "." pascal-mode-syntax-table)
152 (modify-syntax-entry ?> "." pascal-mode-syntax-table)
153 (modify-syntax-entry ?& "." pascal-mode-syntax-table)
154 (modify-syntax-entry ?| "." pascal-mode-syntax-table)
155 (modify-syntax-entry ?_ "_" pascal-mode-syntax-table)
156 (modify-syntax-entry ?\' "\"" pascal-mode-syntax-table))
158 (defconst pascal-font-lock-keywords (purecopy
160 '("^[ \t]*\\(function\\|pro\\(cedure\\|gram\\)\\)\\>[ \t]*\\([a-z]\\)"
161 1 font-lock-keyword-face)
162 '("^[ \t]*\\(function\\|pro\\(cedure\\|gram\\)\\)\\>[ \t]*\\([a-z][a-z0-9_]*\\)"
163 3 font-lock-function-name-face t)
164 ; ("type" "const" "real" "integer" "char" "boolean" "var"
165 ; "record" "array" "file")
166 (cons (concat "\\<\\(array\\|boolean\\|c\\(har\\|onst\\)\\|file\\|"
167 "integer\\|re\\(al\\|cord\\)\\|type\\|var\\)\\>")
168 'font-lock-type-face)
169 '("\\<\\(label\\|external\\|forward\\)\\>" . font-lock-constant-face)
170 '("\\<\\([0-9]+\\)[ \t]*:" 1 font-lock-function-name-face)
171 ; ("of" "to" "for" "if" "then" "else" "case" "while"
172 ; "do" "until" "and" "or" "not" "in" "with" "repeat" "begin" "end")
174 "and\\|begin\\|case\\|do\\|e\\(lse\\|nd\\)\\|for\\|i[fn]\\|"
175 "not\\|o[fr]\\|repeat\\|t\\(hen\\|o\\)\\|until\\|w\\(hile\\|ith\\)"
177 '("\\<\\(goto\\)\\>[ \t]*\\([0-9]+\\)?"
178 1 font-lock-keyword-face)
179 '("\\<\\(goto\\)\\>[ \t]*\\([0-9]+\\)?"
180 2 font-lock-keyword-face t)))
181 "Additional expressions to highlight in Pascal mode.")
182 (put 'pascal-mode 'font-lock-defaults '(pascal-font-lock-keywords nil t))
184 (defcustom pascal-indent-level 3
185 "*Indentation of Pascal statements with respect to containing block."
189 (defcustom pascal-case-indent 2
190 "*Indentation for case statements."
194 (defcustom pascal-auto-newline nil
195 "*Non-nil means automatically insert newlines in certain cases.
196 These include after semicolons and after the punctuation mark after an `end'."
200 (defcustom pascal-indent-nested-functions t
201 "*Non-nil means nested functions are indented."
205 (defcustom pascal-tab-always-indent t
206 "*Non-nil means TAB in Pascal mode should always reindent the current line.
207 If this is nil, TAB inserts a tab if it is at the end of the line
208 and follows non-whitespace text."
212 (defcustom pascal-auto-endcomments t
213 "*Non-nil means automatically insert comments after certain `end's.
214 Specifically, this is done after the ends of cases statements and functions.
215 The name of the function or case is included between the braces."
219 (defcustom pascal-auto-lineup '(all)
220 "*List of contexts where auto lineup of :'s or ='s should be done.
221 Elements can be of type: 'paramlist', 'declaration' or 'case', which will
222 do auto lineup in parameterlist, declarations or case-statements
223 respectively. The word 'all' will do all lineups. '(case paramlist) for
224 instance will do lineup in case-statements and parameterlist, while '(all)
225 will do all lineups."
226 :type '(set :extra-offset 8
227 (const :tag "Everything" all)
228 (const :tag "Parameter lists" paramlist)
229 (const :tag "Decalrations" declaration)
230 (const :tag "Case statements" case))
233 (defcustom pascal-toggle-completions nil
234 "*Non-nil means \\<pascal-mode-map>\\[pascal-complete-word] should try all possible completions one by one.
235 Repeated use of \\[pascal-complete-word] will show you all of them.
236 Normally, when there is more than one possible completion,
237 it displays a list of all possible completions."
241 (defcustom pascal-type-keywords
242 '("array" "file" "packed" "char" "integer" "real" "string" "record")
243 "*Keywords for types used when completing a word in a declaration or parmlist.
244 These include integer, real, char, etc.
245 The types defined within the Pascal program
246 are handled in another way, and should not be added to this list."
247 :type '(repeat (string :tag "Keyword"))
250 (defcustom pascal-start-keywords
251 '("begin" "end" "function" "procedure" "repeat" "until" "while"
252 "read" "readln" "reset" "rewrite" "write" "writeln")
253 "*Keywords to complete when standing at the first word of a statement.
254 These are keywords such as begin, repeat, until, readln.
255 The procedures and variables defined within the Pascal program
256 are handled in another way, and should not be added to this list."
257 :type '(repeat (string :tag "Keyword"))
260 (defcustom pascal-separator-keywords
261 '("downto" "else" "mod" "div" "then")
262 "*Keywords to complete when NOT standing at the first word of a statement.
263 These are keywords such as downto, else, mod, then.
264 Variables and function names defined within the Pascal program
265 are handled in another way, and should not be added to this list."
266 :type '(repeat (string :tag "Keyword"))
274 (defsubst pascal-get-beg-of-line (&optional arg)
276 (beginning-of-line arg)
279 (defsubst pascal-get-end-of-line (&optional arg)
284 (defun pascal-declaration-end ()
286 (while (and (> nest 0)
288 "[:=]\\|\\(\\<record\\>\\)\\|\\(\\<end\\>\\)"
289 (save-excursion (end-of-line 2) (point)) t))
290 (cond ((match-beginning 1) (setq nest (1+ nest)))
291 ((match-beginning 2) (setq nest (1- nest)))
292 ((looking-at "[^(\n]+)") (setq nest 0))))))
295 (defun pascal-declaration-beg ()
297 (while (and (> nest 0)
298 (re-search-backward "[:=]\\|\\<\\(type\\|var\\|label\\|const\\)\\>\\|\\(\\<record\\>\\)\\|\\(\\<end\\>\\)" (pascal-get-beg-of-line 0) t))
299 (cond ((match-beginning 1) (setq nest 0))
300 ((match-beginning 2) (setq nest (1- nest)))
301 ((match-beginning 3) (setq nest (1+ nest)))))
305 (defsubst pascal-within-string ()
307 (nth 3 (parse-partial-sexp (pascal-get-beg-of-line) (point)))))
311 (defun pascal-mode ()
312 "Major mode for editing Pascal code. \\<pascal-mode-map>
313 TAB indents for Pascal code. Delete converts tabs to spaces as it moves back.
315 \\[pascal-complete-word] completes the word around current point with respect \
317 \\[pascal-show-completions] shows all possible completions at this point.
319 Other useful functions are:
321 \\[pascal-mark-defun]\t- Mark function.
322 \\[pascal-insert-block]\t- insert begin ... end;
323 \\[pascal-star-comment]\t- insert (* ... *)
324 \\[pascal-comment-area]\t- Put marked area in a comment, fixing nested comments.
325 \\[pascal-uncomment-area]\t- Uncomment an area commented with \
326 \\[pascal-comment-area].
327 \\[pascal-beg-of-defun]\t- Move to beginning of current function.
328 \\[pascal-end-of-defun]\t- Move to end of current function.
329 \\[pascal-goto-defun]\t- Goto function prompted for in the minibuffer.
330 \\[pascal-outline]\t- Enter pascal-outline-mode (see also pascal-outline).
332 Variables controlling indentation/edit style:
334 pascal-indent-level (default 3)
335 Indentation of Pascal statements with respect to containing block.
336 pascal-case-indent (default 2)
337 Indentation for case statements.
338 pascal-auto-newline (default nil)
339 Non-nil means automatically newline after semicolons and the punctuation
341 pascal-indent-nested-functions (default t)
342 Non-nil means nested functions are indented.
343 pascal-tab-always-indent (default t)
344 Non-nil means TAB in Pascal mode should always reindent the current line,
345 regardless of where in the line point is when the TAB command is used.
346 pascal-auto-endcomments (default t)
347 Non-nil means a comment { ... } is set after the ends which ends cases and
348 functions. The name of the function or case will be set between the braces.
349 pascal-auto-lineup (default t)
350 List of contexts where auto lineup of :'s or ='s should be done.
352 See also the user variables pascal-type-keywords, pascal-start-keywords and
353 pascal-separator-keywords.
355 Turning on Pascal mode calls the value of the variable pascal-mode-hook with
356 no args, if that value is non-nil."
358 (kill-all-local-variables)
359 (use-local-map pascal-mode-map)
360 (setq major-mode 'pascal-mode)
361 (setq mode-name "Pascal")
362 (setq local-abbrev-table pascal-mode-abbrev-table)
363 (set-syntax-table pascal-mode-syntax-table)
364 (make-local-variable 'indent-line-function)
365 (setq indent-line-function 'pascal-indent-line)
366 (make-local-variable 'comment-indent-function)
367 (setq comment-indent-function 'pascal-indent-comment)
368 (make-local-variable 'parse-sexp-ignore-comments)
369 (setq parse-sexp-ignore-comments nil)
370 (make-local-variable 'blink-matching-paren-dont-ignore-comments)
371 (setq blink-matching-paren-dont-ignore-comments t)
372 (make-local-variable 'case-fold-search)
373 (setq case-fold-search t)
374 (make-local-variable 'comment-start)
375 (setq comment-start "{")
376 (make-local-variable 'comment-start-skip)
377 (setq comment-start-skip "(\\*+ *\\|{ *")
378 (make-local-variable 'comment-end)
379 (setq comment-end "}")
381 (make-local-variable 'font-lock-defaults)
382 (setq font-lock-defaults '(pascal-font-lock-keywords nil t))
384 (make-local-variable 'imenu-generic-expression)
385 (setq imenu-generic-expression pascal-imenu-generic-expression)
386 (setq imenu-case-fold-search t)
387 (run-mode-hooks 'pascal-mode-hook))
392 ;;; Electric functions
394 (defun electric-pascal-terminate-line ()
395 "Terminate line and indent next line."
397 ;; First, check if current line should be indented
400 (skip-chars-forward " \t")
401 (if (looking-at pascal-autoindent-lines-re)
402 (pascal-indent-line)))
403 (delete-horizontal-space) ; Removes trailing whitespaces
407 ;; Maybe we should set some endcomments
408 (if pascal-auto-endcomments
409 (pascal-set-auto-comments))
410 ;; Check if we shall indent inside comment
414 (skip-chars-forward " \t")
415 (cond ((looking-at "\\*[ \t]+)")
416 ;; Delete region between `*' and `)' if there is only whitespaces.
418 (delete-horizontal-space))
419 ((and (looking-at "(\\*\\|\\*[^)]")
421 (search-forward "*)" (pascal-get-end-of-line) t))))
423 ;; If last line was a star comment line then this one shall be too.
429 (defun electric-pascal-semi-or-dot ()
430 "Insert `;' or `.' character and reindent the line."
432 (insert last-command-char)
435 (pascal-indent-line))
436 (if pascal-auto-newline
437 (electric-pascal-terminate-line)))
439 (defun electric-pascal-colon ()
440 "Insert `:' and do all indentions except line indent on this line."
442 (insert last-command-char)
443 ;; Do nothing if within string.
444 (if (pascal-within-string)
448 (pascal-indent-line))
449 (let ((pascal-tab-always-indent nil))
450 (pascal-indent-command))))
452 (defun electric-pascal-equal ()
453 "Insert `=', and do indention if within type declaration."
455 (insert last-command-char)
456 (if (eq (car (pascal-calculate-indent)) 'declaration)
457 (let ((pascal-tab-always-indent nil))
458 (pascal-indent-command))))
460 (defun electric-pascal-hash ()
461 "Insert `#', and indent to column 0 if this is a CPP directive."
463 (insert last-command-char)
464 (if (save-excursion (beginning-of-line) (looking-at "^[ \t]*#"))
465 (save-excursion (beginning-of-line)
466 (delete-horizontal-space))))
468 (defun electric-pascal-tab ()
469 "Function called when TAB is pressed in Pascal mode."
471 ;; Do nothing if within a string or in a CPP directive.
472 (if (or (pascal-within-string)
474 (save-excursion (beginning-of-line) (eq (following-char) ?#))))
476 ;; If pascal-tab-always-indent, indent the beginning of the line.
477 (if pascal-tab-always-indent
480 (pascal-indent-line))
482 (skip-chars-backward " \t")
486 (pascal-indent-command)))
491 ;;; Interactive functions
493 (defun pascal-insert-block ()
494 "Insert Pascal begin ... end; block in the code with right indentation."
497 (electric-pascal-terminate-line)
502 (pascal-indent-line)))
504 (defun pascal-star-comment ()
505 "Insert Pascal star comment at point."
509 (electric-pascal-terminate-line)
511 (electric-pascal-terminate-line)
512 (delete-horizontal-space)
516 (defun pascal-mark-defun ()
517 "Mark the current pascal function (or procedure).
518 This puts the mark at the end, and point at the beginning."
521 (pascal-end-of-defun)
523 (pascal-beg-of-defun)
524 (if (fboundp 'zmacs-activate-region)
525 (zmacs-activate-region)))
527 (defun pascal-comment-area (start end)
528 "Put the region into a Pascal comment.
529 The comments that are in this area are \"deformed\":
530 `*)' becomes `!(*' and `}' becomes `!{'.
531 These deformed comments are returned to normal if you use
532 \\[pascal-uncomment-area] to undo the commenting.
534 The commented area starts with `pascal-exclude-str-start', and ends with
535 `pascal-include-str-end'. But if you change these variables,
536 \\[pascal-uncomment-area] won't recognize the comments."
539 ;; Insert start and endcomments
541 (if (and (save-excursion (skip-chars-forward " \t") (eolp))
542 (not (save-excursion (skip-chars-backward " \t") (bolp))))
545 (insert pascal-exclude-str-end)
550 (insert pascal-exclude-str-start)
552 ;; Replace end-comments within commented area
555 (while (re-search-backward "\\*)" start t)
556 (replace-match "!(*" t t)))
558 (while (re-search-backward "}" start t)
559 (replace-match "!{" t t)))))
561 (defun pascal-uncomment-area ()
562 "Uncomment a commented area; change deformed comments back to normal.
563 This command does nothing if the pointer is not in a commented
564 area. See also `pascal-comment-area'."
567 (let ((start (point))
569 ;; Find the boundaries of the comment
571 (setq start (progn (search-backward pascal-exclude-str-start nil t)
573 (setq end (progn (search-forward pascal-exclude-str-end nil t)
575 ;; Check if we're really inside a comment
576 (if (or (equal start (point)) (<= end (point)))
577 (message "Not standing within commented area.")
584 (delete-region pos (1+ (point))))
585 ;; Change comments back to normal
587 (while (re-search-backward "!{" start t)
588 (replace-match "}" t t)))
590 (while (re-search-backward "!(\\*" start t)
591 (replace-match "*)" t t)))
592 ;; Remove startcomment
597 (delete-region pos (1+ (point)))))))))
599 (defun pascal-beg-of-defun ()
600 "Move backward to the beginning of the current function or procedure."
603 (if (not (looking-at (concat "\\s \\|\\s)\\|" pascal-defun-re)))
605 (let ((nest 0) (max -1) (func 0)
606 (reg (concat pascal-beg-block-re "\\|"
607 pascal-end-block-re "\\|"
609 (while (re-search-backward reg nil 'move)
610 (cond ((let ((state (save-excursion
611 (parse-partial-sexp (point-min) (point)))))
612 (or (nth 3 state) (nth 4 state))) ; Inside string or comment
614 ((match-end 1) ; begin|case|record|repeat
615 (if (and (looking-at "\\<record\\>") (>= max 0))
616 (setq func (1- func)))
619 ((match-end 2) ; end|until
620 (if (and (= nest max) (>= max 0))
621 (setq func (1+ func)))
622 (setq nest (1- nest)))
623 ((match-end 3) ; function|procedure
626 (setq func (1- func)))))))
629 (defun pascal-end-of-defun ()
630 "Move forward to the end of the current function or procedure."
632 (if (looking-at "\\s ")
634 (if (not (looking-at pascal-defun-re))
635 (pascal-beg-of-defun))
637 (let ((nest 0) (func 1)
638 (reg (concat pascal-beg-block-re "\\|"
639 pascal-end-block-re "\\|"
641 (while (and (/= func 0)
642 (re-search-forward reg nil 'move))
643 (cond ((let ((state (save-excursion
644 (parse-partial-sexp (point-min) (point)))))
645 (or (nth 3 state) (nth 4 state))) ; Inside string or comment
648 (setq nest (1+ nest))
650 (goto-char (match-beginning 0))
651 (looking-at "\\<record\\>"))
652 (setq func (1+ func))))
654 (setq nest (1- nest))
656 (setq func (1- func))))
658 (setq func (1+ func))))))
661 (defun pascal-end-of-statement ()
662 "Move forward to end of current statement."
664 (let ((parse-sexp-ignore-comments t)
666 (regexp (concat "\\(" pascal-beg-block-re "\\)\\|\\("
667 pascal-end-block-re "\\)")))
668 (if (not (looking-at "[ \t\n]")) (forward-sexp -1))
669 (or (looking-at pascal-beg-block-re)
670 ;; Skip to end of statement
671 (setq pos (catch 'found
674 (cond ((looking-at "[ \t]*;")
675 (skip-chars-forward "^;")
677 (throw 'found (point)))
680 (looking-at pascal-beg-block-re))
681 (goto-char (match-beginning 0))
684 (throw 'found (point))))))))
686 ;; Skip a whole block
689 (re-search-forward regexp nil 'move)
690 (setq nest (if (match-end 1)
694 (throw 'found (point)))
696 (throw 'found (pascal-end-of-statement))))))
699 (defun pascal-downcase-keywords ()
700 "Downcase all Pascal keywords in the buffer."
702 (pascal-change-keywords 'downcase-word))
704 (defun pascal-upcase-keywords ()
705 "Upcase all Pascal keywords in the buffer."
707 (pascal-change-keywords 'upcase-word))
709 (defun pascal-capitalize-keywords ()
710 "Capitalize all Pascal keywords in the buffer."
712 (pascal-change-keywords 'capitalize-word))
714 ;; Change the keywords according to argument.
715 (defun pascal-change-keywords (change-word)
717 (let ((keyword-re (concat "\\<\\("
718 (mapconcat 'identity pascal-keywords "\\|")
720 (goto-char (point-min))
721 (while (re-search-forward keyword-re nil t)
722 (funcall change-word -1)))))
729 (defun pascal-set-auto-comments ()
730 "Insert `{ case }' or `{ NAME }' on this line if appropriate.
731 Insert `{ case }' if there is an `end' on the line which
732 ends a case block. Insert `{ NAME }' if there is an `end'
733 on the line which ends a function or procedure named NAME."
736 (skip-chars-forward " \t")
737 (if (and (looking-at "\\<end;")
740 (search-backward "{" (pascal-get-beg-of-line) t))))
741 (let ((type (car (pascal-calculate-indent))))
742 (if (eq type 'declaration)
745 ;; This is a case block
748 (delete-horizontal-space)
749 (insert " { case }"))
751 ;; Check if this is the end of a function
753 (while (not (or (looking-at pascal-defun-re) (bobp)))
755 (cond ((looking-at pascal-beg-block-re)
756 (setq nest (1- nest)))
757 ((looking-at pascal-end-block-re)
758 (setq nest (1+ nest)))))
764 (delete-horizontal-space)
768 (setq b (progn (pascal-beg-of-defun)
769 (skip-chars-forward "^ \t")
770 (skip-chars-forward " \t")
772 e (progn (skip-chars-forward "a-zA-Z0-9_")
774 (insert-buffer-substring (current-buffer) b e))
775 (insert " }"))))))))))
782 (defconst pascal-indent-alist
783 '((block . (+ ind pascal-indent-level))
784 (case . (+ ind pascal-case-indent))
785 (caseblock . ind) (cpp . 0)
786 (declaration . (+ ind pascal-indent-level))
787 (paramlist . (pascal-indent-paramlist t))
788 (comment . (pascal-indent-comment))
789 (defun . ind) (contexp . ind)
790 (unknown . ind) (string . 0) (progbeg . 0)))
792 (defun pascal-indent-command ()
793 "Indent for special part of code."
794 (let* ((indent-str (pascal-calculate-indent))
795 (type (car indent-str))
796 (ind (car (cdr indent-str))))
797 (cond ((and (eq type 'paramlist)
798 (or (memq 'all pascal-auto-lineup)
799 (memq 'paramlist pascal-auto-lineup)))
800 (pascal-indent-paramlist)
801 (pascal-indent-paramlist))
802 ((and (eq type 'declaration)
803 (or (memq 'all pascal-auto-lineup)
804 (memq 'declaration pascal-auto-lineup)))
805 (pascal-indent-declaration))
806 ((and (eq type 'case) (not (looking-at "^[ \t]*$"))
807 (or (memq 'all pascal-auto-lineup)
808 (memq 'case pascal-auto-lineup)))
809 (pascal-indent-case)))
810 (if (looking-at "[ \t]+$")
811 (skip-chars-forward " \t"))))
813 (defun pascal-indent-line ()
814 "Indent current line as a Pascal statement."
815 (let* ((indent-str (pascal-calculate-indent))
816 (type (car indent-str))
817 (ind (car (cdr indent-str))))
818 ;; Labels should not be indented.
819 (if (and (looking-at "^[0-9a-zA-Z]+[ \t]*:[^=]")
820 (not (eq type 'declaration)))
821 (search-forward ":" nil t))
822 (delete-horizontal-space)
823 (cond (; Some things should not be indented
824 (or (and (eq type 'declaration) (looking-at pascal-declaration-re))
827 (; Other things should have no extra indent
828 (looking-at pascal-noindent-re)
830 (; Nested functions should be indented
831 (looking-at pascal-defun-re)
832 (if (and pascal-indent-nested-functions
834 (indent-to (+ ind pascal-indent-level))
836 (; But most lines are treated this way
837 (indent-to (eval (cdr (assoc type pascal-indent-alist))))
840 (defun pascal-calculate-indent ()
841 "Calculate the indent of the current Pascal line.
842 Return a list of two elements: (INDENT-TYPE INDENT-LEVEL)."
844 (let* ((parse-sexp-ignore-comments t)
846 (state (save-excursion (parse-partial-sexp (point-min) (point))))
847 (nest 0) (par 0) (complete (looking-at "[ \t]*end\\>"))
848 (elsed (looking-at "[ \t]*else\\>")) (funccnt 0)
849 (did-func (looking-at "[ \t]*\\(procedure\\|function\\)\\>"))
850 (type (catch 'nesting
851 ;; Check if inside a string, comment or parenthesis
852 (cond ((nth 3 state) (throw 'nesting 'string))
853 ((nth 4 state) (throw 'nesting 'comment))
855 (goto-char (scan-lists (point) -1 (car state)))
856 (setq par (1+ (current-column))))
857 ((save-excursion (beginning-of-line)
858 (eq (following-char) ?#))
859 (throw 'nesting 'cpp)))
860 ;; Loop until correct indent is found
863 (cond (;--Escape from case statements
864 (and (looking-at "[A-Za-z0-9]+[ \t]*:[^=]")
866 (save-excursion (skip-chars-backward " \t")
869 (end-of-line) (backward-sexp) (point))
871 (> (save-excursion (goto-char oldpos)
875 (throw 'nesting 'caseblock))
876 (;--Beginning of program
877 (looking-at pascal-progbeg-re)
878 (throw 'nesting 'progbeg))
879 (;--No known statements
881 (throw 'nesting 'progbeg))
882 (;--Nest block outwards
883 (looking-at pascal-beg-block-re)
885 (cond ((looking-at "case\\>")
886 (throw 'nesting 'case))
887 ((looking-at "record\\>")
888 (throw 'nesting 'declaration))
889 (t (throw 'nesting 'block)))
890 (if (and (looking-at "record\\>") (= nest 1))
891 (setq funccnt (1- funccnt)))
892 (setq nest (1- nest))))
893 (;--Nest block inwards
894 (looking-at pascal-end-block-re)
895 (if (and (looking-at "end\\s ")
896 elsed (not complete))
897 (throw 'nesting 'block))
899 (setq funccnt (1+ funccnt)))
902 (;--Defun (or parameter list)
903 (and (looking-at pascal-defun-re)
904 (progn (setq funccnt (1- funccnt)
906 (or (bolp) (< funccnt 0))))
907 ;; Prevent searching whole buffer
908 (if (and (bolp) (>= funccnt 0))
909 (throw 'nesting 'progbeg))
911 (throw 'nesting 'defun)
914 (while (re-search-forward
915 "\\(\\<record\\>\\)\\|\\<end\\>"
918 (setq n (1+ n)) (setq n (1- n))))
920 (throw 'nesting 'declaration)
921 (throw 'nesting 'paramlist)))))
923 (and (looking-at pascal-declaration-re)
929 (looking-at "^[ \t]*$"))
930 (throw 'nesting 'unknown)
931 (throw 'nesting 'declaration)))
932 (;--If, else or while statement
934 (looking-at pascal-sub-block-re))
935 (throw 'nesting 'block))
936 (;--Found complete statement
937 (save-excursion (forward-sexp 1)
938 (= (following-char) ?\;))
942 ;; Return type of block and indent level.
943 (if (> par 0) ; Unclosed Parenthesis
945 (list type (pascal-indent-level))))))
947 (defun pascal-indent-level ()
948 "Return the indent-level the current statement has.
949 Do not count labels, case-statements or records."
952 (if (looking-at "[ \t]*[0-9a-zA-Z]+[ \t]*:[^=]")
953 (search-forward ":" nil t)
954 (if (looking-at ".*=[ \t]*record\\>")
955 (search-forward "=" nil t)))
956 (skip-chars-forward " \t")
959 (defun pascal-indent-comment ()
960 "Return indent for current comment."
962 (re-search-backward "\\((\\*\\)\\|{" nil t)
963 (if (match-beginning 1)
964 (1+ (current-column))
967 (defun pascal-indent-case ()
968 "Indent within case statements."
969 (let ((savepos (point-marker))
973 (re-search-backward "\\<case\\>" nil t)))
977 (while (< (point) end)
978 (if (re-search-forward
979 "^[ \t]*[^ \t,:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
980 (marker-position end) 'move)
984 (delete-horizontal-space)
985 (if (> (current-column) ind)
986 (setq ind (current-column)))
987 (pascal-end-of-statement))))
989 (setq oldpos (marker-position end))
990 ;; Indent all case statements
991 (while (< (point) end)
992 (if (re-search-forward
993 "^[ \t]*[^][ \t,\\.:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
994 (marker-position end) 'move)
997 (if (/= (following-char) ?:)
1000 (delete-horizontal-space)
1002 (setq oldpos (point))
1003 (pascal-end-of-statement))
1004 (goto-char savepos)))
1006 (defun pascal-indent-paramlist (&optional arg)
1007 "Indent current line in parameterlist.
1008 If optional arg is non-nil, just return the
1009 indent of the current line in parameterlist."
1011 (let* ((oldpos (point))
1012 (stpos (progn (goto-char (scan-lists (point) -1 1)) (point)))
1013 (stcol (1+ (current-column)))
1014 (edpos (progn (pascal-declaration-end)
1015 (search-backward ")" (pascal-get-beg-of-line) t)
1017 (usevar (re-search-backward "\\<var\\>" stpos t)))
1019 ;; If arg, just return indent
1022 (if (or (not usevar) (looking-at "[ \t]*var\\>"))
1026 (delete-horizontal-space)
1027 (if (and usevar (not (looking-at "var\\>")))
1028 (indent-to (+ 4 stcol)))
1029 (pascal-indent-declaration nil stpos edpos)))))
1031 (defun pascal-indent-declaration (&optional arg start end)
1032 "Indent current lines as declaration, lining up the `:'s or `='s."
1033 (let ((pos (point-marker)))
1034 (if (and (not (or arg start)) (not (pascal-declaration-beg)))
1036 (let ((lineup (if (or (looking-at "\\<var\\>\\|\\<record\\>") arg start)
1038 (stpos (if start start
1039 (forward-word 2) (backward-word 1) (point)))
1040 (edpos (set-marker (make-marker)
1042 (max (progn (pascal-declaration-end)
1048 ;; Indent lines in record block
1050 (while (<= (point) edpos)
1052 (delete-horizontal-space)
1053 (if (looking-at "end\\>")
1055 (indent-to (+ arg pascal-indent-level)))
1059 (setq ind (pascal-get-lineup-indent stpos edpos lineup))
1061 (while (and (<= (point) edpos) (not (eobp)))
1062 (if (search-forward lineup (pascal-get-end-of-line) 'move)
1064 (delete-horizontal-space)
1066 (if (not (looking-at lineup))
1067 (forward-line 1) ; No more indent if there is no : or =
1069 (delete-horizontal-space)
1071 ;; Indent record block
1072 (if (looking-at "record\\>")
1073 (pascal-indent-declaration (current-column)))
1074 (forward-line 1)))))
1076 ;; If arg - move point
1077 (if arg (forward-line -1)
1080 ; "Return the indent level that will line up several lines within the region
1081 ;from b to e nicely. The lineup string is str."
1082 (defun pascal-get-lineup-indent (b e str)
1085 (reg (concat str "\\|\\(\\<record\\>\\)\\|" pascal-defun-re)))
1087 ;; Get rightmost position
1088 (while (< (point) e)
1089 (and (re-search-forward reg (min e (pascal-get-end-of-line 2)) 'move)
1090 (cond ((match-beginning 1)
1091 ;; Skip record blocks
1092 (pascal-declaration-end))
1093 ((match-beginning 2)
1094 ;; We have entered a new procedure. Exit.
1097 (goto-char (match-beginning 0))
1098 (skip-chars-backward " \t")
1099 (if (> (current-column) ind)
1100 (setq ind (current-column)))
1101 (goto-char (match-end 0))
1104 ;; In case no lineup was found
1107 ;; No lineup-string found
1110 (skip-chars-backward " \t")
1111 (1+ (current-column))))))
1118 (defvar pascal-str nil)
1119 (defvar pascal-all nil)
1120 (defvar pascal-pred nil)
1121 (defvar pascal-buffer-to-use nil)
1122 (defvar pascal-flag nil)
1124 (defun pascal-string-diff (str1 str2)
1125 "Return index of first letter where STR1 and STR2 differs."
1129 (if (or (> (1+ diff) (length str1))
1130 (> (1+ diff) (length str2)))
1132 (or (equal (aref str1 diff) (aref str2 diff))
1134 (setq diff (1+ diff))))))
1136 ;; Calculate all possible completions for functions if argument is `function',
1137 ;; completions for procedures if argument is `procedure' or both functions and
1138 ;; procedures otherwise.
1140 (defun pascal-func-completion (type)
1141 ;; Build regular expression for function/procedure names
1142 (if (string= pascal-str "")
1143 (setq pascal-str "[a-zA-Z_]"))
1144 (let ((pascal-str (concat (cond
1145 ((eq type 'procedure) "\\<\\(procedure\\)\\s +")
1146 ((eq type 'function) "\\<\\(function\\)\\s +")
1147 (t "\\<\\(function\\|procedure\\)\\s +"))
1148 "\\<\\(" pascal-str "[a-zA-Z0-9_.]*\\)\\>"))
1151 (if (not (looking-at "\\<\\(function\\|procedure\\)\\>"))
1152 (re-search-backward "\\<\\(function\\|procedure\\)\\>" nil t))
1155 ;; Search through all reachable functions
1156 (while (pascal-beg-of-defun)
1157 (if (re-search-forward pascal-str (pascal-get-end-of-line) t)
1158 (progn (setq match (buffer-substring (match-beginning 2)
1160 (if (or (null pascal-pred)
1161 (funcall pascal-pred match))
1162 (setq pascal-all (cons match pascal-all)))))
1163 (goto-char (match-beginning 0)))))
1165 (defun pascal-get-completion-decl ()
1166 ;; Macro for searching through current declaration (var, type or const)
1167 ;; for matches of `str' and adding the occurrence to `all'
1168 (let ((end (save-excursion (pascal-declaration-end)
1172 (while (< (point) end)
1173 (if (re-search-forward "[:=]" (pascal-get-end-of-line) t)
1174 ;; Traverse current line
1175 (while (and (re-search-backward
1176 (concat "\\((\\|\\<\\(var\\|type\\|const\\)\\>\\)\\|"
1178 (pascal-get-beg-of-line) t)
1179 (not (match-end 1)))
1180 (setq match (buffer-substring (match-beginning 0) (match-end 0)))
1181 (if (string-match (concat "\\<" pascal-str) match)
1182 (if (or (null pascal-pred)
1183 (funcall pascal-pred match))
1184 (setq pascal-all (cons match pascal-all))))))
1185 (if (re-search-forward "\\<record\\>" (pascal-get-end-of-line) t)
1186 (pascal-declaration-end)
1187 (forward-line 1)))))
1189 (defun pascal-type-completion ()
1190 "Calculate all possible completions for types."
1191 (let ((start (point))
1193 ;; Search for all reachable type declarations
1194 (while (or (pascal-beg-of-defun)
1195 (setq goon (not goon)))
1197 (if (and (< start (prog1 (save-excursion (pascal-end-of-defun)
1201 "\\<type\\>\\|\\<\\(begin\\|function\\|procedure\\)\\>"
1203 (not (match-end 1)))
1204 ;; Check current type declaration
1205 (pascal-get-completion-decl))))))
1207 (defun pascal-var-completion ()
1208 "Calculate all possible completions for variables (or constants)."
1209 (let ((start (point))
1211 ;; Search for all reachable var declarations
1212 (while (or (pascal-beg-of-defun)
1213 (setq goon (not goon)))
1215 (if (> start (prog1 (save-excursion (pascal-end-of-defun)
1217 () ; Declarations not reachable
1218 (if (search-forward "(" (pascal-get-end-of-line) t)
1219 ;; Check parameterlist
1220 (pascal-get-completion-decl))
1222 (while (>= (setq twice (1- twice)) 0)
1223 (cond ((and (re-search-forward
1224 (concat "\\<\\(var\\|const\\)\\>\\|"
1225 "\\<\\(begin\\|function\\|procedure\\)\\>")
1227 (not (match-end 2)))
1228 ;; Check var/const declarations
1229 (pascal-get-completion-decl))
1231 (setq twice 0)))))))))
1234 (defun pascal-keyword-completion (keyword-list)
1235 "Give list of all possible completions of keywords in KEYWORD-LIST."
1236 (mapcar '(lambda (s)
1237 (if (string-match (concat "\\<" pascal-str) s)
1238 (if (or (null pascal-pred)
1239 (funcall pascal-pred s))
1240 (setq pascal-all (cons s pascal-all)))))
1243 ;; Function passed to completing-read, try-completion or
1244 ;; all-completions to get completion on STR. If predicate is non-nil,
1245 ;; it must be a function to be called for every match to check if this
1246 ;; should really be a match. If flag is t, the function returns a list
1247 ;; of all possible completions. If it is nil it returns a string, the
1248 ;; longest possible completion, or t if STR is an exact match. If flag
1249 ;; is 'lambda, the function returns t if STR is an exact match, nil
1252 (defun pascal-completion (pascal-str pascal-pred pascal-flag)
1254 (let ((pascal-all nil))
1255 ;; Set buffer to use for searching labels. This should be set
1256 ;; within functions which use pascal-completions
1257 (set-buffer pascal-buffer-to-use)
1259 ;; Determine what should be completed
1260 (let ((state (car (pascal-calculate-indent))))
1261 (cond (;--Within a declaration or parameterlist
1262 (or (eq state 'declaration) (eq state 'paramlist)
1263 (and (eq state 'defun)
1265 (re-search-backward ")[ \t]*:"
1266 (pascal-get-beg-of-line) t))))
1267 (if (or (eq state 'paramlist) (eq state 'defun))
1268 (pascal-beg-of-defun))
1269 (pascal-type-completion)
1270 (pascal-keyword-completion pascal-type-keywords))
1271 (;--Starting a new statement
1272 (and (not (eq state 'contexp))
1274 (skip-chars-backward "a-zA-Z0-9_.")
1276 (or (looking-at pascal-nosemi-re)
1279 (looking-at "\\s *\\(;\\|:[^=]\\)")))))
1280 (save-excursion (pascal-var-completion))
1281 (pascal-func-completion 'procedure)
1282 (pascal-keyword-completion pascal-start-keywords))
1284 (save-excursion (pascal-var-completion))
1285 (pascal-func-completion 'function)
1286 (pascal-keyword-completion pascal-separator-keywords))))
1288 ;; Now we have built a list of all matches. Give response to caller
1289 (pascal-completion-response))))
1291 (defun pascal-completion-response ()
1292 (cond ((or (equal pascal-flag 'lambda) (null pascal-flag))
1293 ;; This was not called by all-completions
1294 (if (null pascal-all)
1295 ;; Return nil if there was no matching label
1297 ;; Get longest string common in the labels
1298 (let* ((elm (cdr pascal-all))
1299 (match (car pascal-all))
1300 (min (length match))
1302 (if (string= match pascal-str)
1303 ;; Return t if first match was an exact match
1305 (while (not (null elm))
1306 ;; Find longest common string
1307 (if (< (setq tmp (pascal-string-diff match (car elm))) min)
1310 (setq match (substring match 0 min))))
1311 ;; Terminate with match=t if this is an exact match
1312 (if (string= (car elm) pascal-str)
1316 (setq elm (cdr elm)))))
1317 ;; If this is a test just for exact match, return nil ot t
1318 (if (and (equal pascal-flag 'lambda) (not (equal match 't)))
1321 ;; If flag is t, this was called by all-completions. Return
1322 ;; list of all possible completions
1326 (defvar pascal-last-word-numb 0)
1327 (defvar pascal-last-word-shown nil)
1328 (defvar pascal-last-completions nil)
1330 (defun pascal-complete-word ()
1331 "Complete word at current point.
1332 \(See also `pascal-toggle-completions', `pascal-type-keywords',
1333 `pascal-start-keywords' and `pascal-separator-keywords'.)"
1335 (let* ((b (save-excursion (skip-chars-backward "a-zA-Z0-9_") (point)))
1336 (e (save-excursion (skip-chars-forward "a-zA-Z0-9_") (point)))
1337 (pascal-str (buffer-substring b e))
1338 ;; The following variable is used in pascal-completion
1339 (pascal-buffer-to-use (current-buffer))
1340 (allcomp (if (and pascal-toggle-completions
1341 (string= pascal-last-word-shown pascal-str))
1342 pascal-last-completions
1343 (all-completions pascal-str 'pascal-completion)))
1344 (match (if pascal-toggle-completions
1346 pascal-str (mapcar '(lambda (elm)
1347 (cons elm 0)) allcomp)))))
1348 ;; Delete old string
1351 ;; Toggle-completions inserts whole labels
1352 (if pascal-toggle-completions
1354 ;; Update entry number in list
1355 (setq pascal-last-completions allcomp
1356 pascal-last-word-numb
1357 (if (>= pascal-last-word-numb (1- (length allcomp)))
1359 (1+ pascal-last-word-numb)))
1360 (setq pascal-last-word-shown (elt allcomp pascal-last-word-numb))
1361 ;; Display next match or same string if no match was found
1362 (if (not (null allcomp))
1363 (insert "" pascal-last-word-shown)
1364 (insert "" pascal-str)
1365 (message "(No match)")))
1366 ;; The other form of completion does not necessarily do that.
1368 ;; Insert match if found, or the original string if no match
1369 (if (or (null match) (equal match 't))
1370 (progn (insert "" pascal-str)
1371 (message "(No match)"))
1373 ;; Give message about current status of completion
1374 (cond ((equal match 't)
1375 (if (not (null (cdr allcomp)))
1376 (message "(Complete but not unique)")
1377 (message "(Sole completion)")))
1378 ;; Display buffer if the current completion didn't help
1379 ;; on completing the label.
1380 ((and (not (null (cdr allcomp))) (= (length pascal-str)
1382 (with-output-to-temp-buffer "*Completions*"
1383 (display-completion-list allcomp))
1384 ;; Wait for a keypress. Then delete *Completion* window
1385 (momentary-string-display "" (point))
1386 (delete-window (get-buffer-window (get-buffer "*Completions*")))
1389 (defun pascal-show-completions ()
1390 "Show all possible completions at current point."
1392 (let* ((b (save-excursion (skip-chars-backward "a-zA-Z0-9_") (point)))
1393 (e (save-excursion (skip-chars-forward "a-zA-Z0-9_") (point)))
1394 (pascal-str (buffer-substring b e))
1395 ;; The following variable is used in pascal-completion
1396 (pascal-buffer-to-use (current-buffer))
1397 (allcomp (if (and pascal-toggle-completions
1398 (string= pascal-last-word-shown pascal-str))
1399 pascal-last-completions
1400 (all-completions pascal-str 'pascal-completion))))
1401 ;; Show possible completions in a temporary buffer.
1402 (with-output-to-temp-buffer "*Completions*"
1403 (display-completion-list allcomp))
1404 ;; Wait for a keypress. Then delete *Completion* window
1405 (momentary-string-display "" (point))
1406 (delete-window (get-buffer-window (get-buffer "*Completions*")))))
1409 (defun pascal-get-default-symbol ()
1410 "Return symbol around current point as a string."
1412 (buffer-substring (progn
1413 (skip-chars-backward " \t")
1414 (skip-chars-backward "a-zA-Z0-9_")
1417 (skip-chars-forward "a-zA-Z0-9_")
1420 (defun pascal-build-defun-re (str &optional arg)
1421 "Return function/procedure starting with STR as regular expression.
1422 With optional second arg non-nil, STR is the complete name of the instruction."
1424 (concat "^\\(function\\|procedure\\)[ \t]+\\(" str "\\)\\>")
1425 (concat "^\\(function\\|procedure\\)[ \t]+\\(" str "[a-zA-Z0-9_]*\\)\\>")))
1427 ;; Function passed to completing-read, try-completion or
1428 ;; all-completions to get completion on any function name. If
1429 ;; predicate is non-nil, it must be a function to be called for every
1430 ;; match to check if this should really be a match. If flag is t, the
1431 ;; function returns a list of all possible completions. If it is nil
1432 ;; it returns a string, the longest possible completion, or t if STR
1433 ;; is an exact match. If flag is 'lambda, the function returns t if
1434 ;; STR is an exact match, nil otherwise.
1436 (defun pascal-comp-defun (pascal-str pascal-pred pascal-flag)
1438 (let ((pascal-all nil)
1441 ;; Set buffer to use for searching labels. This should be set
1442 ;; within functions which use pascal-completions
1443 (set-buffer pascal-buffer-to-use)
1445 (let ((pascal-str pascal-str))
1446 ;; Build regular expression for functions
1447 (if (string= pascal-str "")
1448 (setq pascal-str (pascal-build-defun-re "[a-zA-Z_]"))
1449 (setq pascal-str (pascal-build-defun-re pascal-str)))
1450 (goto-char (point-min))
1452 ;; Build a list of all possible completions
1453 (while (re-search-forward pascal-str nil t)
1454 (setq match (buffer-substring (match-beginning 2) (match-end 2)))
1455 (if (or (null pascal-pred)
1456 (funcall pascal-pred match))
1457 (setq pascal-all (cons match pascal-all)))))
1459 ;; Now we have built a list of all matches. Give response to caller
1460 (pascal-completion-response))))
1462 (defun pascal-goto-defun ()
1463 "Move to specified Pascal function/procedure.
1464 The default is a name found in the buffer around point."
1466 (let* ((default (pascal-get-default-symbol))
1467 ;; The following variable is used in pascal-comp-function
1468 (pascal-buffer-to-use (current-buffer))
1469 (default (if (pascal-comp-defun default nil 'lambda)
1471 (label (if (not (string= default ""))
1472 ;; Do completion with default
1473 (completing-read (concat "Label: (default " default ") ")
1474 'pascal-comp-defun nil t "")
1475 ;; There is no default value. Complete without it
1476 (completing-read "Label: "
1477 'pascal-comp-defun nil t ""))))
1478 ;; If there was no response on prompt, use default value
1479 (if (string= label "")
1480 (setq label default))
1481 ;; Goto right place in buffer if label is not an empty string
1482 (or (string= label "")
1484 (goto-char (point-min))
1485 (re-search-forward (pascal-build-defun-re label t))
1486 (beginning-of-line)))))
1491 ;;; Pascal-outline-mode
1493 (defvar pascal-outline-map nil "Keymap used in Pascal Outline mode.")
1495 (if pascal-outline-map
1497 (if (fboundp 'set-keymap-name)
1498 (set-keymap-name pascal-outline-map 'pascal-outline-map))
1499 (if (fboundp 'set-keymap-parent)
1500 (set-keymap-parent (setq pascal-outline-map (make-sparse-keymap))
1502 (setq pascal-outline-map (copy-keymap pascal-mode-map)))
1503 (define-key pascal-outline-map "\M-\C-a" 'pascal-outline-prev-defun)
1504 (define-key pascal-outline-map "\M-\C-e" 'pascal-outline-next-defun)
1505 (define-key pascal-outline-map "\C-c\C-d" 'pascal-outline-goto-defun)
1506 (define-key pascal-outline-map "\C-c\C-s" 'pascal-show-all)
1507 (define-key pascal-outline-map "\C-c\C-h" 'pascal-hide-other-defuns))
1509 (defvar pascal-outline-mode nil "Non-nil while using Pascal Outline mode.")
1510 (make-variable-buffer-local 'pascal-outline-mode)
1511 (set-default 'pascal-outline-mode nil)
1512 (if (not (assoc 'pascal-outline-mode minor-mode-alist))
1513 (setq minor-mode-alist (append minor-mode-alist
1514 (list '(pascal-outline-mode " Outl")))))
1516 (defun pascal-outline (&optional arg)
1517 "Outline-line minor mode for Pascal mode.
1518 When in Pascal Outline mode, portions
1519 of the text being edited may be made invisible. \\<pascal-outline-map>
1521 Pascal Outline mode provides some additional commands.
1523 \\[pascal-outline-prev-defun]\
1524 \t- Move to previous function/procedure, hiding everything else.
1525 \\[pascal-outline-next-defun]\
1526 \t- Move to next function/procedure, hiding everything else.
1527 \\[pascal-outline-goto-defun]\
1528 \t- Goto function/procedure prompted for in minibuffer,
1529 \t hide all other functions.
1530 \\[pascal-show-all]\t- Show the whole buffer.
1531 \\[pascal-hide-other-defuns]\
1532 \t- Hide everything but the current function (function under the cursor).
1533 \\[pascal-outline]\t- Leave pascal-outline-mode."
1535 (setq pascal-outline-mode
1536 (if (null arg) (not pascal-outline-mode) t))
1537 (if (fboundp 'redraw-mode-line)
1539 (if pascal-outline-mode
1541 (setq selective-display t)
1542 (use-local-map pascal-outline-map))
1544 (setq selective-display nil)
1546 (use-local-map pascal-mode-map))))
1548 (defun pascal-outline-change (b e pascal-flag)
1549 (let ((modp (buffer-modified-p)))
1551 (subst-char-in-region b e (if (= pascal-flag ?\n)
1552 ?\^M ?\n) pascal-flag)
1553 (set-buffer-modified-p modp))))
1555 (defun pascal-show-all ()
1556 "Show all of the text in the buffer."
1558 (pascal-outline-change (point-min) (point-max) ?\n))
1560 (defun pascal-hide-other-defuns ()
1561 "Show only the current defun."
1564 (let ((beg (progn (if (not (looking-at "\\(function\\|procedure\\)\\>"))
1565 (pascal-beg-of-defun))
1567 (end (progn (pascal-end-of-defun)
1569 (search-forward "\n\\|\^M" nil t)
1571 (opoint (point-min)))
1572 (goto-char (point-min))
1574 ;; Hide all functions before current function
1575 (while (re-search-forward "^\\(function\\|procedure\\)\\>" beg 'move)
1576 (pascal-outline-change opoint (1- (match-beginning 0)) ?\^M)
1577 (setq opoint (point))
1578 ;; Functions may be nested
1579 (if (> (progn (pascal-end-of-defun) (point)) beg)
1580 (goto-char opoint)))
1582 (pascal-outline-change opoint (1- beg) ?\^M))
1584 ;; Show current function
1585 (pascal-outline-change beg end ?\n)
1586 ;; Hide nested functions
1588 (while (re-search-forward "^\\(function\\|procedure\\)\\>" end 'move)
1589 (setq opoint (point))
1590 (pascal-end-of-defun)
1591 (pascal-outline-change opoint (point) ?\^M))
1596 ;; Hide all function after current function
1597 (while (re-search-forward "^\\(function\\|procedure\\)\\>" nil 'move)
1598 (pascal-outline-change opoint (1- (match-beginning 0)) ?\^M)
1599 (setq opoint (point))
1600 (pascal-end-of-defun))
1601 (pascal-outline-change opoint (point-max) ?\^M)
1603 ;; Hide main program
1604 (if (< (progn (forward-line -1) (point)) end)
1607 (pascal-end-of-defun)
1609 (pascal-outline-change (point) (point-max) ?\^M))))))
1611 (defun pascal-outline-next-defun ()
1612 "Move to next function/procedure, hiding all others."
1614 (pascal-end-of-defun)
1615 (pascal-hide-other-defuns))
1617 (defun pascal-outline-prev-defun ()
1618 "Move to previous function/procedure, hiding all others."
1620 (pascal-beg-of-defun)
1621 (pascal-hide-other-defuns))
1623 (defun pascal-outline-goto-defun ()
1624 "Move to specified function/procedure, hiding all others."
1627 (pascal-hide-other-defuns))
1631 ;;; arch-tag: 04535136-fd93-40b4-a505-c9bebdc051f5
1632 ;;; pascal.el ends here