pascal.el 54.7 KB
Newer Older
Richard M. Stallman's avatar
Richard M. Stallman committed
1
;;; pascal.el --- major mode for editing pascal source in Emacs
Richard M. Stallman's avatar
Richard M. Stallman committed
2

3
;; Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
Richard M. Stallman's avatar
Richard M. Stallman committed
4

Richard M. Stallman's avatar
Richard M. Stallman committed
5
;; Author: Espen Skoglund <espensk@stud.cs.uit.no>
Richard M. Stallman's avatar
Richard M. Stallman committed
6
;; Keywords: languages
Richard M. Stallman's avatar
Richard M. Stallman committed
7

Richard M. Stallman's avatar
Richard M. Stallman committed
8
;; This file is part of GNU Emacs.
Richard M. Stallman's avatar
Richard M. Stallman committed
9

Erik Naggum's avatar
Erik Naggum committed
10
;; GNU Emacs is free software; you can redistribute it and/or modify
Richard M. Stallman's avatar
Richard M. Stallman committed
11
;; it under the terms of the GNU General Public License as published by
Erik Naggum's avatar
Erik Naggum committed
12 13
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.
Richard M. Stallman's avatar
Richard M. Stallman committed
14

Erik Naggum's avatar
Erik Naggum committed
15
;; GNU Emacs is distributed in the hope that it will be useful,
Richard M. Stallman's avatar
Richard M. Stallman committed
16 17 18
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;; GNU General Public License for more details.
Richard M. Stallman's avatar
Richard M. Stallman committed
19

Richard M. Stallman's avatar
Richard M. Stallman committed
20
;; You should have received a copy of the GNU General Public License
Erik Naggum's avatar
Erik Naggum committed
21 22 23
;; 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.
Richard M. Stallman's avatar
Richard M. Stallman committed
24 25 26

;;; Commentary:

Erik Naggum's avatar
Erik Naggum committed
27 28
;; USAGE
;; =====
Richard M. Stallman's avatar
Richard M. Stallman committed
29

Erik Naggum's avatar
Erik Naggum committed
30 31 32 33
;; Emacs should enter Pascal mode when you find a Pascal source file.
;; When you have entered Pascal mode, you may get more info by pressing
;; C-h m. You may also get online help describing various functions by:
;; C-h f <Name of function you want described>
Richard M. Stallman's avatar
Richard M. Stallman committed
34

Erik Naggum's avatar
Erik Naggum committed
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
;; If you want to customize Pascal mode to fit you better, you may add
;; these lines (the values of the variables presented here are the defaults):
;;
;; ;; User customization for Pascal mode
;; (setq pascal-indent-level       3
;;       pascal-case-indent        2
;;       pascal-auto-newline       nil
;;       pascal-tab-always-indent  t
;;       pascal-auto-endcomments   t
;;       pascal-auto-lineup        '(all)
;;       pascal-toggle-completions nil
;;       pascal-type-keywords      '("array" "file" "packed" "char" 
;; 				      "integer" "real" "string" "record")
;;       pascal-start-keywords     '("begin" "end" "function" "procedure"
;; 				      "repeat" "until" "while" "read" "readln"
;; 				      "reset" "rewrite" "write" "writeln")
;;       pascal-separator-keywords '("downto" "else" "mod" "div" "then"))
Richard M. Stallman's avatar
Richard M. Stallman committed
52

Erik Naggum's avatar
Erik Naggum committed
53 54 55 56 57 58 59
;; KNOWN BUGS / BUGREPORTS
;; =======================
;; As far as I know, there are no bugs in the current version of this
;; package.  This may not be true however, since I never use this mode
;; myself and therefore would never notice them anyway.   If you do
;; find any bugs, you may submit them to: espensk@stud.cs.uit.no
;; as well as to bug-gnu-emacs@prep.ai.mit.edu.
Richard M. Stallman's avatar
Richard M. Stallman committed
60 61

;;; Code:
Richard M. Stallman's avatar
Richard M. Stallman committed
62

63 64 65 66
(defgroup pascal nil
  "Major mode for editing Pascal source in Emacs"
  :group 'languages)

Richard M. Stallman's avatar
Richard M. Stallman committed
67 68 69 70 71 72
(defvar pascal-mode-abbrev-table nil
  "Abbrev table in use in Pascal-mode buffers.")
(define-abbrev-table 'pascal-mode-abbrev-table ())

(defvar pascal-mode-map ()
  "Keymap used in Pascal mode.")
Richard M. Stallman's avatar
Richard M. Stallman committed
73 74 75 76 77 78 79
(if pascal-mode-map
    ()
  (setq pascal-mode-map (make-sparse-keymap))
  (define-key pascal-mode-map ";"        'electric-pascal-semi-or-dot)
  (define-key pascal-mode-map "."        'electric-pascal-semi-or-dot)
  (define-key pascal-mode-map ":"        'electric-pascal-colon)
  (define-key pascal-mode-map "="        'electric-pascal-equal)
80
  (define-key pascal-mode-map "#"        'electric-pascal-hash)
Richard M. Stallman's avatar
Richard M. Stallman committed
81 82
  (define-key pascal-mode-map "\r"       'electric-pascal-terminate-line)
  (define-key pascal-mode-map "\t"       'electric-pascal-tab)
83 84
  (define-key pascal-mode-map "\M-\t"    'pascal-complete-word)
  (define-key pascal-mode-map "\M-?"     'pascal-show-completions)
Richard M. Stallman's avatar
Richard M. Stallman committed
85
  (define-key pascal-mode-map "\177"     'backward-delete-char-untabify)
86 87
  (define-key pascal-mode-map "\M-\C-h"  'pascal-mark-defun)
  (define-key pascal-mode-map "\C-c\C-b" 'pascal-insert-block)
Richard M. Stallman's avatar
Richard M. Stallman committed
88 89 90
  (define-key pascal-mode-map "\M-*"     'pascal-star-comment)
  (define-key pascal-mode-map "\C-c\C-c" 'pascal-comment-area)
  (define-key pascal-mode-map "\C-c\C-u" 'pascal-uncomment-area)
91 92 93 94
  (define-key pascal-mode-map "\M-\C-a"  'pascal-beg-of-defun)
  (define-key pascal-mode-map "\M-\C-e"  'pascal-end-of-defun)
  (define-key pascal-mode-map "\C-c\C-d" 'pascal-goto-defun)
  (define-key pascal-mode-map "\C-c\C-o" 'pascal-outline)
Richard M. Stallman's avatar
Richard M. Stallman committed
95 96
;;; A command to change the whole buffer won't be used terribly
;;; often, so no need for a key binding.
Richard M. Stallman's avatar
Richard M. Stallman committed
97 98 99 100
;  (define-key pascal-mode-map "\C-cd"    'pascal-downcase-keywords)
;  (define-key pascal-mode-map "\C-cu"    'pascal-upcase-keywords)
;  (define-key pascal-mode-map "\C-cc"    'pascal-capitalize-keywords)
  )
101 102 103 104

(defvar pascal-imenu-generic-expression
  '("^[ \t]*\\(function\\|procedure\\)[ \t\n]+\\([a-zA-Z0-9_.:]+\\)" . (2))
  "Imenu expression for Pascal-mode.  See `imenu-generic-expression'.")
105

Richard M. Stallman's avatar
Richard M. Stallman committed
106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122
(defvar pascal-keywords
  '("and" "array" "begin" "case" "const" "div" "do" "downto" "else" "end" 
    "file" "for" "function" "goto" "if" "in" "label" "mod" "nil" "not" "of" 
    "or" "packed" "procedure" "program" "record" "repeat" "set" "then" "to" 
    "type" "until" "var" "while" "with"
    ;; The following are not standard in pascal, but widely used.
    "get" "put" "input" "output" "read" "readln" "reset" "rewrite" "write"
    "writeln"))

;;;
;;; Regular expressions used to calculate indent, etc.
;;;
(defconst pascal-symbol-re      "\\<[a-zA-Z_][a-zA-Z_0-9.]*\\>")
(defconst pascal-beg-block-re   "\\<\\(begin\\|case\\|record\\|repeat\\)\\>")
(defconst pascal-end-block-re   "\\<\\(end\\|until\\)\\>")
(defconst pascal-declaration-re "\\<\\(const\\|label\\|type\\|var\\)\\>")
(defconst pascal-defun-re       "\\<\\(function\\|procedure\\|program\\)\\>")
123
(defconst pascal-sub-block-re   "\\<\\(if\\|else\\|for\\|while\\|with\\)\\>")
124
(defconst pascal-noindent-re    "\\<\\(begin\\|end\\|until\\|else\\)\\>")
Richard M. Stallman's avatar
Richard M. Stallman committed
125 126 127 128 129 130 131
(defconst pascal-nosemi-re      "\\<\\(begin\\|repeat\\|then\\|do\\|else\\)\\>")
(defconst pascal-autoindent-lines-re
  "\\<\\(label\\|var\\|type\\|const\\|until\\|end\\|begin\\|repeat\\|else\\)\\>")

;;; Strings used to mark beginning and end of excluded text
(defconst pascal-exclude-str-start "{-----\\/----- EXCLUDED -----\\/-----")
(defconst pascal-exclude-str-end " -----/\\----- EXCLUDED -----/\\-----}")
Richard M. Stallman's avatar
Richard M. Stallman committed
132 133 134 135 136 137 138

(defvar pascal-mode-syntax-table nil
  "Syntax table in use in Pascal-mode buffers.")

(if pascal-mode-syntax-table
    ()
  (setq pascal-mode-syntax-table (make-syntax-table))
139
  (modify-syntax-entry ?\\ "."   pascal-mode-syntax-table)
Richard M. Stallman's avatar
Richard M. Stallman committed
140 141
  (modify-syntax-entry ?( "()1"  pascal-mode-syntax-table)  
  (modify-syntax-entry ?) ")(4"  pascal-mode-syntax-table)
Richard M. Stallman's avatar
Richard M. Stallman committed
142
  (modify-syntax-entry ?* ". 23" pascal-mode-syntax-table)
Richard M. Stallman's avatar
Richard M. Stallman committed
143 144 145 146 147 148 149 150 151 152 153 154 155
  (modify-syntax-entry ?{ "<"    pascal-mode-syntax-table)
  (modify-syntax-entry ?} ">"    pascal-mode-syntax-table)
  (modify-syntax-entry ?+ "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?- "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?= "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?% "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?< "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?> "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?& "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?| "."    pascal-mode-syntax-table)
  (modify-syntax-entry ?_ "w"    pascal-mode-syntax-table)
  (modify-syntax-entry ?\' "\""  pascal-mode-syntax-table))

156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176
(defvar pascal-font-lock-keywords
  (list
   '("^[ \t]*\\(function\\|pro\\(cedure\\|gram\\)\\)\\>[ \t]*\\(\\sw+\\)?"
     (1 font-lock-keyword-face) (3 font-lock-function-name-face nil t))
;   ("type" "const" "real" "integer" "char" "boolean" "var"
;    "record" "array" "file")
   (cons (concat "\\<\\(array\\|boolean\\|c\\(har\\|onst\\)\\|file\\|"
		 "integer\\|re\\(al\\|cord\\)\\|type\\|var\\)\\>")
	 'font-lock-type-face)
   '("\\<\\(label\\|external\\|forward\\)\\>" . font-lock-reference-face)
   '("\\<\\([0-9]+\\)[ \t]*:" 1 font-lock-reference-face)
;   ("of" "to" "for" "if" "then" "else" "case" "while"
;    "do" "until" "and" "or" "not" "in" "with" "repeat" "begin" "end")
   (concat "\\<\\("
	   "and\\|begin\\|case\\|do\\|e\\(lse\\|nd\\)\\|for\\|i[fn]\\|"
	   "not\\|o[fr]\\|repeat\\|t\\(hen\\|o\\)\\|until\\|w\\(hile\\|ith\\)"
	   "\\)\\>")
   '("\\<\\(goto\\)\\>[ \t]*\\([0-9]+\\)?"
     (1 font-lock-keyword-face) (2 font-lock-reference-face nil t)))
  "Additional expressions to highlight in Pascal mode.")

177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
(defcustom pascal-indent-level 3
  "*Indentation of Pascal statements with respect to containing block."
  :type 'integer
  :group 'pascal)

(defcustom pascal-case-indent 2
  "*Indentation for case statements."
  :type 'integer
  :group 'pascal)

(defcustom pascal-auto-newline nil
  "*Non-nil means automatically insert newlines in certain cases.
These include after semicolons and after the punctuation mark after an `end'."
  :type 'boolean
  :group 'pascal)

(defcustom pascal-tab-always-indent t
  "*Non-nil means TAB in Pascal mode should always reindent the current line.
If this is nil, TAB inserts a tab if it is at the end of the line
and follows non-whitespace text."
  :type 'boolean
  :group 'pascal)

(defcustom pascal-auto-endcomments t
  "*Non-nil means automatically insert comments after certain `end's.
Specifically, this is done after the ends of cases statements and functions.
The name of the function or case is included between the braces."
  :type 'boolean
  :group 'pascal)

(defcustom pascal-auto-lineup '(all)
208 209 210 211 212
  "*List of contexts where auto lineup of :'s or ='s should be done.
Elements can be of type: 'paramlist', 'declaration' or 'case', which will
do auto lineup in parameterlist, declarations or case-statements
respectively. The word 'all' will do all lineups. '(case paramlist) for
instance will do lineup in case-statements and parameterlist, while '(all)
213 214 215 216 217 218 219 220
will do all lineups."
  :type '(repeat (choice (const all)
			 (const paramlist)
			 (const declaration)
			 (const case)))
  :group 'pascal)

(defcustom pascal-toggle-completions nil
221 222 223
  "*Non-nil means \\<pascal-mode-map>\\[pascal-complete-word] should try all possible completions one by one.
Repeated use of \\[pascal-complete-word] will show you all of them.
Normally, when there is more than one possible completion,
224 225 226
it displays a list of all possible completions."
  :type 'boolean
  :group 'pascal)
227

228
(defcustom pascal-type-keywords
Richard M. Stallman's avatar
Richard M. Stallman committed
229 230
  '("array" "file" "packed" "char" "integer" "real" "string" "record")
  "*Keywords for types used when completing a word in a declaration or parmlist.
231 232 233 234 235
These include integer, real, char, etc.
The types defined within the Pascal program
are handled in another way, and should not be added to this list."
  :type '(repeat (string :tag "Keyword"))
  :group 'pascal)
236

237
(defcustom pascal-start-keywords
Richard M. Stallman's avatar
Richard M. Stallman committed
238 239 240
  '("begin" "end" "function" "procedure" "repeat" "until" "while"
    "read" "readln" "reset" "rewrite" "write" "writeln")
  "*Keywords to complete when standing at the first word of a statement.
241
These are keywords such as begin, repeat, until, readln.
Richard M. Stallman's avatar
Richard M. Stallman committed
242
The procedures and variables defined within the Pascal program
243 244 245
are handled in another way,  and should not be added to this list."
  :type '(repeat (string :tag "Keyword"))
  :group 'pascal)
246

247
(defcustom pascal-separator-keywords
Richard M. Stallman's avatar
Richard M. Stallman committed
248 249
  '("downto" "else" "mod" "div" "then")
  "*Keywords to complete when NOT standing at the first word of a statement.
250 251 252 253 254 255
These are keywords such as downto, else, mod, then.
Variables and function names defined within the Pascal program
are handled in another way, and should not be added to this list."
  :type '(repeat (string :tag "Keyword"))
  :group 'pascal)

Richard M. Stallman's avatar
Richard M. Stallman committed
256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277

;;;
;;;  Macros
;;;

(defsubst pascal-get-beg-of-line (&optional arg)
  (save-excursion
    (beginning-of-line arg)
    (point)))

(defsubst pascal-get-end-of-line (&optional arg)
  (save-excursion
    (end-of-line arg)
    (point)))

(defun pascal-declaration-end ()
  (let ((nest 1))
    (while (and (> nest 0)
		(re-search-forward 
		 "[:=]\\|\\(\\<record\\>\\)\\|\\(\\<end\\>\\)" 
		 (save-excursion (end-of-line 2) (point)) t))
      (cond ((match-beginning 1) (setq nest (1+ nest)))
278 279
	    ((match-beginning 2) (setq nest (1- nest)))
	    ((looking-at "[^(\n]+)") (setq nest 0))))))
Richard M. Stallman's avatar
Richard M. Stallman committed
280

281

Richard M. Stallman's avatar
Richard M. Stallman committed
282 283 284
(defun pascal-declaration-beg ()
  (let ((nest 1))
    (while (and (> nest 0)
285
		(re-search-backward "[:=]\\|\\<\\(type\\|var\\|label\\|const\\)\\>\\|\\(\\<record\\>\\)\\|\\(\\<end\\>\\)" (pascal-get-beg-of-line 0) t))
Richard M. Stallman's avatar
Richard M. Stallman committed
286 287 288 289
      (cond ((match-beginning 1) (setq nest 0))
	    ((match-beginning 2) (setq nest (1- nest)))
	    ((match-beginning 3) (setq nest (1+ nest)))))
    (= nest 0)))
290

Richard M. Stallman's avatar
Richard M. Stallman committed
291 292 293 294 295
  
(defsubst pascal-within-string ()
  (save-excursion
    (nth 3 (parse-partial-sexp (pascal-get-beg-of-line) (point)))))

Richard M. Stallman's avatar
Richard M. Stallman committed
296 297 298

;;;###autoload
(defun pascal-mode ()
Richard M. Stallman's avatar
Richard M. Stallman committed
299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325
  "Major mode for editing Pascal code. \\<pascal-mode-map>
TAB indents for Pascal code.  Delete converts tabs to spaces as it moves back.

\\[pascal-complete-word] completes the word around current point with respect \
to position in code
\\[pascal-show-completions] shows all possible completions at this point.

Other useful functions are:

\\[pascal-mark-defun]\t- Mark function.
\\[pascal-insert-block]\t- insert begin ... end;
\\[pascal-star-comment]\t- insert (* ... *)
\\[pascal-comment-area]\t- Put marked area in a comment, fixing nested comments.
\\[pascal-uncomment-area]\t- Uncomment an area commented with \
\\[pascal-comment-area].
\\[pascal-beg-of-defun]\t- Move to beginning of current function.
\\[pascal-end-of-defun]\t- Move to end of current function.
\\[pascal-goto-defun]\t- Goto function prompted for in the minibuffer.
\\[pascal-outline]\t- Enter pascal-outline-mode (see also pascal-outline).

Variables controlling indentation/edit style:

 pascal-indent-level      (default 3)
    Indentation of Pascal statements with respect to containing block.
 pascal-case-indent       (default 2)
    Indentation for case statements.
 pascal-auto-newline      (default nil)
326 327
    Non-nil means automatically newline after semicolons and the punctuation
    mark after an end.
328
 pascal-tab-always-indent (default t)
Richard M. Stallman's avatar
Richard M. Stallman committed
329 330
    Non-nil means TAB in Pascal mode should always reindent the current line,
    regardless of where in the line point is when the TAB command is used.
Richard M. Stallman's avatar
Richard M. Stallman committed
331 332 333
 pascal-auto-endcomments  (default t)
    Non-nil means a comment { ... } is set after the ends which ends cases and
    functions. The name of the function or case will be set between the braces.
334
 pascal-auto-lineup       (default t)
335
    List of contexts where auto lineup of :'s or ='s should be done.
Richard M. Stallman's avatar
Richard M. Stallman committed
336 337

See also the user variables pascal-type-keywords, pascal-start-keywords and
338
pascal-separator-keywords.
Richard M. Stallman's avatar
Richard M. Stallman committed
339 340 341 342 343 344 345 346 347 348 349 350

Turning on Pascal mode calls the value of the variable pascal-mode-hook with
no args, if that value is non-nil."
  (interactive)
  (kill-all-local-variables)
  (use-local-map pascal-mode-map)
  (setq major-mode 'pascal-mode)
  (setq mode-name "Pascal")
  (setq local-abbrev-table pascal-mode-abbrev-table)
  (set-syntax-table pascal-mode-syntax-table)
  (make-local-variable 'indent-line-function)
  (setq indent-line-function 'pascal-indent-line)
351
  (make-local-variable 'comment-indent-function)
Richard M. Stallman's avatar
Richard M. Stallman committed
352
  (setq comment-indent-function 'pascal-indent-comment)
353 354
  (make-local-variable 'comment-start)
  (setq comment-start "{")
Richard M. Stallman's avatar
Richard M. Stallman committed
355
  (make-local-variable 'parse-sexp-ignore-comments)
356
  (setq parse-sexp-ignore-comments nil)
Richard M. Stallman's avatar
Richard M. Stallman committed
357 358
  (make-local-variable 'case-fold-search)
  (setq case-fold-search t)
359 360
  (make-local-variable 'comment-start)
  (setq comment-start "{")
361 362 363 364
  (make-local-variable 'comment-start-skip)
  (setq comment-start-skip "(\\*+ *\\|{ *")
  (make-local-variable 'comment-end)
  (setq comment-end "}")
365
  ;; Font lock support
366 367
  (make-local-variable 'font-lock-defaults)
  (setq font-lock-defaults '(pascal-font-lock-keywords nil t))
368 369 370
  ;; Imenu support
  (make-local-variable 'imenu-generic-expression)
  (setq imenu-generic-expression pascal-imenu-generic-expression)
Richard M. Stallman's avatar
Richard M. Stallman committed
371 372
  (run-hooks 'pascal-mode-hook))

Richard M. Stallman's avatar
Richard M. Stallman committed
373 374


Richard M. Stallman's avatar
Richard M. Stallman committed
375 376 377 378 379 380
;;;
;;;  Electric functions
;;;
(defun electric-pascal-terminate-line ()
  "Terminate line and indent next line."
  (interactive)
Richard M. Stallman's avatar
Richard M. Stallman committed
381
  ;; First, check if current line should be indented
Richard M. Stallman's avatar
Richard M. Stallman committed
382 383 384
  (save-excursion
    (beginning-of-line)
    (skip-chars-forward " \t")
Richard M. Stallman's avatar
Richard M. Stallman committed
385
    (if (looking-at pascal-autoindent-lines-re)
Richard M. Stallman's avatar
Richard M. Stallman committed
386
	(pascal-indent-line)))
Richard M. Stallman's avatar
Richard M. Stallman committed
387
  (delete-horizontal-space) ; Removes trailing whitespaces
Richard M. Stallman's avatar
Richard M. Stallman committed
388
  (newline)
Richard M. Stallman's avatar
Richard M. Stallman committed
389
  ;; Indent next line
Richard M. Stallman's avatar
Richard M. Stallman committed
390 391 392 393 394 395 396 397 398
  (pascal-indent-line)
  ;; Maybe we should set some endcomments
  (if pascal-auto-endcomments
      (pascal-set-auto-comments))
  ;; Check if we shall indent inside comment
  (let ((setstar nil))
    (save-excursion
      (forward-line -1)
      (skip-chars-forward " \t")
Richard M. Stallman's avatar
Richard M. Stallman committed
399
      (cond ((looking-at "\\*[ \t]+)")
Richard M. Stallman's avatar
Richard M. Stallman committed
400 401
	     ;; Delete region between `*' and `)' if there is only whitespaces.
	     (forward-char 1)
Richard M. Stallman's avatar
Richard M. Stallman committed
402
	     (delete-horizontal-space))
Richard M. Stallman's avatar
Richard M. Stallman committed
403 404 405 406 407
	    ((and (looking-at "(\\*\\|\\*[^)]")
		  (not (save-excursion
			 (search-forward "*)" (pascal-get-end-of-line) t))))
	     (setq setstar t))))
    ;; If last line was a star comment line then this one shall be too.
Richard M. Stallman's avatar
Richard M. Stallman committed
408 409 410
    (if (null setstar)	
	(pascal-indent-line)
      (insert "*  "))))
Richard M. Stallman's avatar
Richard M. Stallman committed
411 412


Richard M. Stallman's avatar
Richard M. Stallman committed
413 414
(defun electric-pascal-semi-or-dot ()
  "Insert `;' or `.' character and reindent the line."
Richard M. Stallman's avatar
Richard M. Stallman committed
415 416 417 418 419 420 421 422 423
  (interactive)
  (insert last-command-char)
  (save-excursion
    (beginning-of-line)
    (pascal-indent-line))
  (if pascal-auto-newline
      (electric-pascal-terminate-line)))

(defun electric-pascal-colon ()
Richard M. Stallman's avatar
Richard M. Stallman committed
424
  "Insert `:' and do all indentions except line indent on this line."
Richard M. Stallman's avatar
Richard M. Stallman committed
425 426
  (interactive)
  (insert last-command-char)
Richard M. Stallman's avatar
Richard M. Stallman committed
427 428 429 430 431 432 433 434 435
  ;; Do nothing if within string.
  (if (pascal-within-string)
      ()
    (save-excursion
      (beginning-of-line)
      (pascal-indent-line))
    (let ((pascal-tab-always-indent nil))
      (pascal-indent-command))))

Richard M. Stallman's avatar
Richard M. Stallman committed
436
(defun electric-pascal-equal ()
Richard M. Stallman's avatar
Richard M. Stallman committed
437
  "Insert `=', and do indention if within type declaration."
Richard M. Stallman's avatar
Richard M. Stallman committed
438 439
  (interactive)
  (insert last-command-char)
Richard M. Stallman's avatar
Richard M. Stallman committed
440
  (if (eq (car (pascal-calculate-indent)) 'declaration)
Richard M. Stallman's avatar
Richard M. Stallman committed
441 442 443
      (let ((pascal-tab-always-indent nil))
	(pascal-indent-command))))

444
(defun electric-pascal-hash ()
445
  "Insert `#', and indent to column 0 if this is a CPP directive."
446 447 448 449 450 451
  (interactive)
  (insert last-command-char)
  (if (save-excursion (beginning-of-line) (looking-at "^[ \t]*#"))
      (save-excursion (beginning-of-line)
		      (delete-horizontal-space))))

Richard M. Stallman's avatar
Richard M. Stallman committed
452
(defun electric-pascal-tab ()
Richard M. Stallman's avatar
Richard M. Stallman committed
453
  "Function called when TAB is pressed in Pascal mode."
Richard M. Stallman's avatar
Richard M. Stallman committed
454
  (interactive)
455 456 457 458
  ;; Do nothing if within a string or in a CPP directive.
  (if (or (pascal-within-string)
	  (and (not (bolp))
	       (save-excursion (beginning-of-line) (eq (following-char) ?#))))
Richard M. Stallman's avatar
Richard M. Stallman committed
459 460 461 462 463 464
      (insert "\t")
    ;; If pascal-tab-always-indent, indent the beginning of the line.
    (if pascal-tab-always-indent
	(save-excursion
	  (beginning-of-line)
	  (pascal-indent-line))
465 466 467 468 469
      (if (save-excursion
	    (skip-chars-backward " \t")
	    (bolp))
	  (pascal-indent-line)
	(insert "\t")))
Richard M. Stallman's avatar
Richard M. Stallman committed
470 471 472
    (pascal-indent-command)))


Richard M. Stallman's avatar
Richard M. Stallman committed
473 474 475 476 477

;;;
;;; Interactive functions
;;;
(defun pascal-insert-block ()
Richard M. Stallman's avatar
Richard M. Stallman committed
478
  "Insert Pascal begin ... end; block in the code with right indentation."
Richard M. Stallman's avatar
Richard M. Stallman committed
479 480 481 482 483 484 485 486 487 488 489
  (interactive)
  (pascal-indent-line)
  (insert "begin")
  (electric-pascal-terminate-line)
  (save-excursion
    (electric-pascal-terminate-line)
    (insert "end;")
    (beginning-of-line)
    (pascal-indent-line)))

(defun pascal-star-comment ()
Richard M. Stallman's avatar
Richard M. Stallman committed
490
  "Insert Pascal star comment at point."
Richard M. Stallman's avatar
Richard M. Stallman committed
491 492 493 494 495 496
  (interactive)
  (pascal-indent-line)
  (insert "(*")
  (electric-pascal-terminate-line)
  (save-excursion
    (electric-pascal-terminate-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
497 498 499
    (delete-horizontal-space)
    (insert ")"))
  (insert "  "))
Richard M. Stallman's avatar
Richard M. Stallman committed
500

Richard M. Stallman's avatar
Richard M. Stallman committed
501
(defun pascal-mark-defun ()
Richard M. Stallman's avatar
Richard M. Stallman committed
502
  "Mark the current pascal function (or procedure).
Richard M. Stallman's avatar
Richard M. Stallman committed
503
This puts the mark at the end, and point at the beginning."
Richard M. Stallman's avatar
Richard M. Stallman committed
504 505
  (interactive)
  (push-mark (point))
Richard M. Stallman's avatar
Richard M. Stallman committed
506
  (pascal-end-of-defun)
Richard M. Stallman's avatar
Richard M. Stallman committed
507
  (push-mark (point))
Richard M. Stallman's avatar
Richard M. Stallman committed
508 509 510
  (pascal-beg-of-defun)
  (if (fboundp 'zmacs-activate-region)
      (zmacs-activate-region)))
Richard M. Stallman's avatar
Richard M. Stallman committed
511 512

(defun pascal-comment-area (start end)
Richard M. Stallman's avatar
Richard M. Stallman committed
513 514 515 516 517 518 519 520 521
  "Put the region into a Pascal comment.
The comments that are in this area are \"deformed\":
`*)' becomes `!(*' and `}' becomes `!{'.
These deformed comments are returned to normal if you use
\\[pascal-uncomment-area] to undo the commenting.

The commented area starts with `pascal-exclude-str-start', and ends with
`pascal-include-str-end'.  But if you change these variables,
\\[pascal-uncomment-area] won't recognize the comments."
Richard M. Stallman's avatar
Richard M. Stallman committed
522 523 524 525 526 527 528 529
  (interactive "r")
  (save-excursion
    ;; Insert start and endcomments
    (goto-char end)
    (if (and (save-excursion (skip-chars-forward " \t") (eolp))
	     (not (save-excursion (skip-chars-backward " \t") (bolp))))
	(forward-line 1)
      (beginning-of-line))
Richard M. Stallman's avatar
Richard M. Stallman committed
530
    (insert pascal-exclude-str-end)
Richard M. Stallman's avatar
Richard M. Stallman committed
531 532 533 534
    (setq end (point))
    (newline)
    (goto-char start)
    (beginning-of-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
535
    (insert pascal-exclude-str-start)
Richard M. Stallman's avatar
Richard M. Stallman committed
536 537 538 539 540 541 542 543 544 545 546
    (newline)
    ;; Replace end-comments within commented area
    (goto-char end)
    (save-excursion
      (while (re-search-backward "\\*)" start t)
	(replace-match "!(*" t t)))
    (save-excursion
      (while (re-search-backward "}" start t)
	(replace-match "!{" t t)))))

(defun pascal-uncomment-area ()
Richard M. Stallman's avatar
Richard M. Stallman committed
547 548
  "Uncomment a commented area; change deformed comments back to normal.
This command does nothing if the pointer is not in a commented
Richard M. Stallman's avatar
Richard M. Stallman committed
549 550 551 552 553 554 555
area.  See also `pascal-comment-area'."
  (interactive)
  (save-excursion
    (let ((start (point))
	  (end (point)))
      ;; Find the boundaries of the comment
      (save-excursion
Richard M. Stallman's avatar
Richard M. Stallman committed
556
	(setq start (progn (search-backward pascal-exclude-str-start nil t)
Richard M. Stallman's avatar
Richard M. Stallman committed
557
			   (point)))
Richard M. Stallman's avatar
Richard M. Stallman committed
558
	(setq end (progn (search-forward pascal-exclude-str-end nil t)
Richard M. Stallman's avatar
Richard M. Stallman committed
559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583
			 (point))))
      ;; Check if we're really inside a comment
      (if (or (equal start (point)) (<= end (point)))
	  (message "Not standing within commented area.")
	(progn
	  ;; Remove endcomment
	  (goto-char end)
	  (beginning-of-line)
	  (let ((pos (point)))
	    (end-of-line)
	    (delete-region pos (1+ (point))))
	  ;; Change comments back to normal
	  (save-excursion
	    (while (re-search-backward "!{" start t)
	      (replace-match "}" t t)))
	  (save-excursion
	    (while (re-search-backward "!(\\*" start t)
	      (replace-match "*)" t t)))
	  ;; Remove startcomment
	  (goto-char start)
	  (beginning-of-line)
	  (let ((pos (point)))
	    (end-of-line)
	    (delete-region pos (1+ (point)))))))))

Richard M. Stallman's avatar
Richard M. Stallman committed
584 585
(defun pascal-beg-of-defun ()
  "Move backward to the beginning of the current function or procedure."
Richard M. Stallman's avatar
Richard M. Stallman committed
586
  (interactive)
Richard M. Stallman's avatar
Richard M. Stallman committed
587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615
  (catch 'found
    (if (not (looking-at (concat "\\s \\|\\s)\\|" pascal-defun-re)))
	(forward-sexp 1))
    (let ((nest 0) (max -1) (func 0)
	  (reg (concat pascal-beg-block-re "\\|" 
		       pascal-end-block-re "\\|"
		       pascal-defun-re)))
      (while (re-search-backward reg nil 'move)
	(cond ((let ((state (save-excursion
			      (parse-partial-sexp (point-min) (point)))))
		 (or (nth 3 state) (nth 4 state))) ; Inside string or comment
	       ())
	      ((match-end 1)                       ; begin|case|record|repeat
	       (if (and (looking-at "\\<record\\>") (>= max 0))
		   (setq func (1- func)))
	       (setq nest (1+ nest)
		     max (max nest max)))
	      ((match-end 2)                       ; end|until
	       (if (and (= nest max) (>= max 0))
		   (setq func (1+ func)))
	       (setq nest (1- nest)))
	      ((match-end 3)                       ; function|procedure
	       (if (= 0 func)
		   (throw 'found t)
		 (setq func (1- func)))))))
    nil))

(defun pascal-end-of-defun ()
  "Move forward to the end of the current function or procedure."
Richard M. Stallman's avatar
Richard M. Stallman committed
616
  (interactive)
Richard M. Stallman's avatar
Richard M. Stallman committed
617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644
  (if (looking-at "\\s ")
      (forward-sexp 1))
  (if (not (looking-at pascal-defun-re))
      (pascal-beg-of-defun))
  (forward-char 1)
  (let ((nest 0) (func 1)
	(reg (concat pascal-beg-block-re "\\|" 
		     pascal-end-block-re "\\|"
		     pascal-defun-re)))
    (while (and (/= func 0)
		(re-search-forward reg nil 'move))
      (cond ((let ((state (save-excursion
			      (parse-partial-sexp (point-min) (point)))))
		 (or (nth 3 state) (nth 4 state))) ; Inside string or comment
	       ())
	    ((match-end 1)
	     (setq nest (1+ nest))
	     (if (save-excursion
		   (goto-char (match-beginning 0))
		   (looking-at "\\<record\\>"))
		 (setq func (1+ func))))
	    ((match-end 2)
	     (setq nest (1- nest))
	     (if (= nest 0)
		 (setq func (1- func))))
	    ((match-end 3)
	     (setq func (1+ func))))))
  (forward-line 1))
Richard M. Stallman's avatar
Richard M. Stallman committed
645

646 647 648
(defun pascal-end-of-statement ()
  "Move forward to end of current statement."
  (interactive)
649 650
  (let ((parse-sexp-ignore-comments t)
	(nest 0) pos
651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683
	(regexp (concat "\\(" pascal-beg-block-re "\\)\\|\\("
			pascal-end-block-re "\\)")))
    (if (not (looking-at "[ \t\n]")) (forward-sexp -1))
    (or (looking-at pascal-beg-block-re)
	;; Skip to end of statement
	(setq pos (catch 'found
		    (while t
		      (forward-sexp 1)
		      (cond ((looking-at "[ \t]*;")
			     (skip-chars-forward "^;")
			     (forward-char 1)
			     (throw 'found (point)))
			    ((save-excursion
			       (forward-sexp -1)
			       (looking-at pascal-beg-block-re))
			     (goto-char (match-beginning 0))
			     (throw 'found nil))
			    ((eobp)
			     (throw 'found (point))))))))
    (if (not pos)
	;; Skip a whole block
	(catch 'found
	  (while t
	    (re-search-forward regexp nil 'move)
	    (setq nest (if (match-end 1) 
			   (1+ nest)
			 (1- nest)))
	    (cond ((eobp)
		   (throw 'found (point)))
		  ((= 0 nest)
		   (throw 'found (pascal-end-of-statement))))))
      pos)))

Richard M. Stallman's avatar
Richard M. Stallman committed
684
(defun pascal-downcase-keywords ()
Richard M. Stallman's avatar
Richard M. Stallman committed
685
  "Downcase all Pascal keywords in the buffer."
Richard M. Stallman's avatar
Richard M. Stallman committed
686 687 688 689
  (interactive)
  (pascal-change-keywords 'downcase-word))

(defun pascal-upcase-keywords ()
Richard M. Stallman's avatar
Richard M. Stallman committed
690
  "Upcase all Pascal keywords in the buffer."
Richard M. Stallman's avatar
Richard M. Stallman committed
691 692 693 694
  (interactive)
  (pascal-change-keywords 'upcase-word))

(defun pascal-capitalize-keywords ()
Richard M. Stallman's avatar
Richard M. Stallman committed
695
  "Capitalize all Pascal keywords in the buffer."
Richard M. Stallman's avatar
Richard M. Stallman committed
696 697 698
  (interactive)
  (pascal-change-keywords 'capitalize-word))

Richard M. Stallman's avatar
Richard M. Stallman committed
699
;; Change the keywords according to argument.
Richard M. Stallman's avatar
Richard M. Stallman committed
700 701
(defun pascal-change-keywords (change-word)
  (save-excursion
Richard M. Stallman's avatar
Richard M. Stallman committed
702 703 704 705 706 707 708 709
    (let ((keyword-re (concat "\\<\\("
			      (mapconcat 'identity pascal-keywords "\\|")
			      "\\)\\>")))
      (goto-char (point-min))
      (while (re-search-forward keyword-re nil t)
	(funcall change-word -1)))))


Richard M. Stallman's avatar
Richard M. Stallman committed
710 711 712 713 714

;;;
;;; Other functions
;;;
(defun pascal-set-auto-comments ()
Richard M. Stallman's avatar
Richard M. Stallman committed
715 716 717 718
  "Insert `{ case }' or `{ NAME }' on this line if appropriate.
Insert `{ case }' if there is an `end' on the line which
ends a case block.  Insert `{ NAME }' if there is an `end'
on the line which ends a function or procedure named NAME."
Richard M. Stallman's avatar
Richard M. Stallman committed
719 720 721
  (save-excursion
    (forward-line -1)
    (skip-chars-forward " \t")
Richard M. Stallman's avatar
Richard M. Stallman committed
722
    (if (and (looking-at "\\<end;")
Richard M. Stallman's avatar
Richard M. Stallman committed
723 724
	     (not (save-excursion
		    (end-of-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
725
		    (search-backward "{" (pascal-get-beg-of-line) t))))
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760
	(let ((type (car (pascal-calculate-indent))))
	  (if (eq type 'declaration)
	      ()
	    (if (eq type 'case)
		;; This is a case block
		(progn
		  (end-of-line)
		  (delete-horizontal-space)
		  (insert " { case }"))
	      (let ((nest 1))
		;; Check if this is the end of a function
		(save-excursion
		  (while (not (or (looking-at pascal-defun-re) (bobp)))
		    (backward-sexp 1)
		    (cond ((looking-at pascal-beg-block-re)
			   (setq nest (1- nest)))
			  ((looking-at pascal-end-block-re)
			   (setq nest (1+ nest)))))
		  (if (bobp)
		      (setq nest 1)))
		(if (zerop nest)
		    (progn
		      (end-of-line)
		      (delete-horizontal-space)
		      (insert " { ")
		      (let (b e)
			(save-excursion
			  (setq b (progn (pascal-beg-of-defun)
					 (skip-chars-forward "^ \t")
					 (skip-chars-forward " \t")
					 (point))
				e (progn (skip-chars-forward "a-zA-Z0-9_")
					 (point))))
			(insert-buffer-substring (current-buffer) b e))
		      (insert " }"))))))))))
Richard M. Stallman's avatar
Richard M. Stallman committed
761

Richard M. Stallman's avatar
Richard M. Stallman committed
762 763


Richard M. Stallman's avatar
Richard M. Stallman committed
764
;;;
Richard M. Stallman's avatar
Richard M. Stallman committed
765 766 767 768 769
;;; Indentation
;;;
(defconst pascal-indent-alist
  '((block . (+ ind pascal-indent-level))
    (case . (+ ind pascal-case-indent))
770
    (caseblock . ind) (cpp . 0)
Richard M. Stallman's avatar
Richard M. Stallman committed
771 772 773 774 775 776
    (declaration . (+ ind pascal-indent-level))
    (paramlist . (pascal-indent-paramlist t))
    (comment . (pascal-indent-comment t))
    (defun . ind) (contexp . ind)
    (unknown . 0) (string . 0)))

Richard M. Stallman's avatar
Richard M. Stallman committed
777
(defun pascal-indent-command ()
Richard M. Stallman's avatar
Richard M. Stallman committed
778 779 780 781
  "Indent for special part of code."
  (let* ((indent-str (pascal-calculate-indent))
	 (type (car indent-str))
	 (ind (car (cdr indent-str))))
782 783 784
    (cond ((and (eq type 'paramlist)
		(or (memq 'all pascal-auto-lineup)
		    (memq 'paramlist pascal-auto-lineup)))
Richard M. Stallman's avatar
Richard M. Stallman committed
785 786
	   (pascal-indent-paramlist)
	   (pascal-indent-paramlist))
787 788 789
	  ((and (eq type 'declaration)
		(or (memq 'all pascal-auto-lineup)
		    (memq 'declaration  pascal-auto-lineup)))
Richard M. Stallman's avatar
Richard M. Stallman committed
790
	   (pascal-indent-declaration))
791 792 793
	  ((and (eq type 'case) (not (looking-at "^[ \t]*$"))
		(or (memq 'all pascal-auto-lineup)
		    (memq 'case pascal-auto-lineup)))
Richard M. Stallman's avatar
Richard M. Stallman committed
794 795 796
	   (pascal-indent-case)))
    (if (looking-at "[ \t]+$")
	(skip-chars-forward " \t"))))
Richard M. Stallman's avatar
Richard M. Stallman committed
797 798

(defun pascal-indent-line ()
Richard M. Stallman's avatar
Richard M. Stallman committed
799 800 801 802 803 804 805
  "Indent current line as a Pascal statement."
  (let* ((indent-str (pascal-calculate-indent))
	 (type (car indent-str))
	 (ind (car (cdr indent-str))))
    (if (looking-at "^[0-9a-zA-Z]+[ \t]*:[^=]")
	(search-forward ":" nil t))
    (delete-horizontal-space)
806
    ;; Some things should not be indented
Richard M. Stallman's avatar
Richard M. Stallman committed
807
    (if (or (and (eq type 'declaration) (looking-at pascal-declaration-re))
808
	    (eq type 'cpp)
Richard M. Stallman's avatar
Richard M. Stallman committed
809 810 811 812 813 814 815 816 817 818 819 820 821
	    (looking-at pascal-defun-re))
	()
      ;; Other things should have no extra indent
      (if (looking-at pascal-noindent-re)
	  (indent-to ind)
	;; But most lines are treated this way:
	(indent-to (eval (cdr (assoc type pascal-indent-alist))))
	))))

(defun pascal-calculate-indent ()
  "Calculate the indent of the current Pascal line.
Return a list of two elements: (INDENT-TYPE INDENT-LEVEL)."
  (save-excursion
822 823
    (let* ((parse-sexp-ignore-comments t)
	   (oldpos (point))
Richard M. Stallman's avatar
Richard M. Stallman committed
824
	   (state (save-excursion (parse-partial-sexp (point-min) (point))))
825
	   (nest 0) (par 0) (complete (looking-at "[ \t]*end\\>"))
826
	   (elsed (looking-at "[ \t]*else\\>"))
Richard M. Stallman's avatar
Richard M. Stallman committed
827 828 829 830 831 832
	   (type (catch 'nesting
		   ;; Check if inside a string, comment or parenthesis
		   (cond ((nth 3 state) (throw 'nesting 'string))
			 ((nth 4 state) (throw 'nesting 'comment))
			 ((> (car state) 0)
			  (goto-char (scan-lists (point) -1 (car state)))
833 834 835 836
			  (setq par (1+ (current-column))))
			 ((save-excursion (beginning-of-line)
					  (eq (following-char) ?#))
			  (throw 'nesting 'cpp)))
Richard M. Stallman's avatar
Richard M. Stallman committed
837 838 839
		   ;; Loop until correct indent is found
		   (while t
		     (backward-sexp 1)
840 841 842 843 844 845 846 847 848 849 850 851 852 853
		     (cond (;--Escape from case statements
			    (and (looking-at "[A-Za-z0-9]+[ \t]*:[^=]")
				 (not complete)
				 (save-excursion (skip-chars-backward " \t")
						 (bolp))
				 (= (save-excursion
				      (end-of-line) (backward-sexp) (point))
				    (point))
				 (> (save-excursion (goto-char oldpos)
						    (beginning-of-line)
						    (point))
				    (point)))
			    (throw 'nesting 'caseblock))
			   (;--Nest block outwards
Richard M. Stallman's avatar
Richard M. Stallman committed
854 855 856 857 858 859
			    (looking-at pascal-beg-block-re)
			    (if (= nest 0)
				(cond ((looking-at "case\\>")
				       (throw 'nesting 'case))
				      ((looking-at "record\\>")
				       (throw 'nesting 'declaration))
860
				      (t (throw 'nesting 'block)))
Richard M. Stallman's avatar
Richard M. Stallman committed
861 862 863
			      (setq nest (1- nest))))
			   (;--Nest block inwards
			    (looking-at pascal-end-block-re)
864 865 866
			    (if (and (looking-at "end\\s ")
				     elsed (not complete))
				(throw 'nesting 'block))
Richard M. Stallman's avatar
Richard M. Stallman committed
867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884
			    (setq complete t
				  nest (1+ nest)))
			   (;--Defun (or parameter list)
			    (looking-at pascal-defun-re)
			    (if (= 0 par)
				(throw 'nesting 'defun)
			      (setq par 0)
			      (let ((n 0))
				(while (re-search-forward
					"\\(\\<record\\>\\)\\|\\<end\\>"
					oldpos t)
				  (if (match-end 1)
				      (setq n (1+ n)) (setq n (1- n))))
				(if (> n 0)
				    (throw 'nesting 'declaration)
				  (throw 'nesting 'paramlist)))))
			   (;--Declaration part
			    (looking-at pascal-declaration-re)
885 886 887 888
			    (if (save-excursion
				  (goto-char oldpos)
				  (forward-line -1)
				  (looking-at "^[ \t]*$"))
Richard M. Stallman's avatar
Richard M. Stallman committed
889 890 891 892 893 894 895 896 897 898 899 900 901 902
				(throw 'nesting 'unknown)
			      (throw 'nesting 'declaration)))
			   (;--If, else or while statement
			    (and (not complete)
				 (looking-at pascal-sub-block-re))
			    (throw 'nesting 'block))
			   (;--Found complete statement
			    (save-excursion (forward-sexp 1)
					    (= (following-char) ?\;))
			    (setq complete t))
			   (;--No known statements
			    (bobp)
			    (throw 'nesting 'unknown))
			   )))))
903

Richard M. Stallman's avatar
Richard M. Stallman committed
904 905 906 907 908 909 910 911
      ;; Return type of block and indent level.
      (if (> par 0)                               ; Unclosed Parenthesis 
	  (list 'contexp par)
	(list type (pascal-indent-level))))))

(defun pascal-indent-level ()
  "Return the indent-level the current statement has.
Do not count labels, case-statements or records."
Richard M. Stallman's avatar
Richard M. Stallman committed
912 913
  (save-excursion
    (beginning-of-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
914 915 916 917
    (if (looking-at "[ \t]*[0-9a-zA-Z]+[ \t]*:[^=]")
	(search-forward ":" nil t)
      (if (looking-at ".*=[ \t]*record\\>")
	  (search-forward "=" nil t)))
Richard M. Stallman's avatar
Richard M. Stallman committed
918 919 920
    (skip-chars-forward " \t")
    (current-column)))

Richard M. Stallman's avatar
Richard M. Stallman committed
921 922 923 924 925 926 927 928 929 930 931 932 933
(defun pascal-indent-comment (&optional arg)
  "Indent current line as comment.
If optional arg is non-nil, just return the
column number the line should be indented to."
    (let* ((stcol (save-excursion
		    (re-search-backward "(\\*\\|{" nil t)
		    (1+ (current-column)))))
      (if arg stcol
	(delete-horizontal-space)
	(indent-to stcol))))

(defun pascal-indent-case ()
  "Indent within case statements."
934 935
  (let ((savepos (point-marker))
	(end (prog2
936 937
		 (end-of-line)
		 (point-marker)
Richard M. Stallman's avatar
Richard M. Stallman committed
938
	       (re-search-backward "\\<case\\>" nil t)))
939
	(beg (point)) oldpos
Richard M. Stallman's avatar
Richard M. Stallman committed
940 941 942
	(ind 0))
    ;; Get right indent
    (while (< (point) (marker-position end))
943 944 945 946
      (if (re-search-forward 
	   "^[ \t]*[^ \t,:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
	   (marker-position end) 'move)
	  (forward-char -1))
947 948 949 950 951 952
      (if (< (point) (marker-position end))
	  (progn
	    (delete-horizontal-space)
	    (if (> (current-column) ind)
		(setq ind (current-column)))
	    (pascal-end-of-statement))))
Richard M. Stallman's avatar
Richard M. Stallman committed
953
    (goto-char beg)
954
    (setq oldpos (marker-position end))
Richard M. Stallman's avatar
Richard M. Stallman committed
955 956
    ;; Indent all case statements
    (while (< (point) (marker-position end))
957
      (if (re-search-forward
958
	   "^[ \t]*[^][ \t,\\.:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
959
	   (marker-position end) 'move)
Richard M. Stallman's avatar
Richard M. Stallman committed
960 961 962 963 964 965
	  (forward-char -1))
      (indent-to (1+ ind))
      (if (/= (following-char) ?:)
	  ()
	(forward-char 1)
	(delete-horizontal-space)
966 967 968
	(insert " "))
      (setq oldpos (point))
      (pascal-end-of-statement))
969
    (goto-char savepos)))
Richard M. Stallman's avatar
Richard M. Stallman committed
970 971 972 973 974

(defun pascal-indent-paramlist (&optional arg)
  "Indent current line in parameterlist.
If optional arg is non-nil, just return the
indent of the current line in parameterlist."
Richard M. Stallman's avatar
Richard M. Stallman committed
975
  (save-excursion
Richard M. Stallman's avatar
Richard M. Stallman committed
976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
    (let* ((oldpos (point))
	   (stpos (progn (goto-char (scan-lists (point) -1 1)) (point)))
	   (stcol (1+ (current-column)))
	   (edpos (progn (pascal-declaration-end) 
			 (search-backward ")" (pascal-get-beg-of-line) t)
			 (point)))
	   (usevar (re-search-backward "\\<var\\>" stpos t)))
      (if arg (progn
		;; If arg, just return indent
		(goto-char oldpos)
		(beginning-of-line)
		(if (or (not usevar) (looking-at "[ \t]*var\\>"))
		    stcol (+ 4 stcol)))
	(goto-char stpos)
	(forward-char 1)
	(delete-horizontal-space)
	(if (and usevar (not (looking-at "var\\>")))
	    (indent-to (+ 4 stcol)))
	(pascal-indent-declaration nil stpos edpos)))))

(defun pascal-indent-declaration (&optional arg start end)
  "Indent current lines as declaration, lining up the `:'s or `='s."
  (let ((pos (point-marker)))
    (if (and (not (or arg start)) (not (pascal-declaration-beg)))
	()
      (let ((lineup (if (or (looking-at "\\<var\\>\\|\\<record\\>") arg start) 
			":" "="))
	    (stpos (if start start
		       (forward-word 2) (backward-word 1) (point)))
	    (edpos (set-marker (make-marker)
			       (if end end
				 (max (progn (pascal-declaration-end)
					     (point))
				      pos))))
	    ind)

	(goto-char stpos)
	;; Indent lines in record block
	(if arg
	    (while (<= (point) (marker-position edpos))
	      (beginning-of-line)
	      (delete-horizontal-space)
	      (if (looking-at "end\\>")
		  (indent-to arg)
		(indent-to (+ arg pascal-indent-level)))
	      (forward-line 1)))

	;; Do lineup
	(setq ind (pascal-get-lineup-indent stpos edpos lineup))
	(goto-char stpos)
1026 1027
	(while (and (<= (point) (marker-position edpos))
		    (not (eobp)))
Richard M. Stallman's avatar
Richard M. Stallman committed
1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057
	  (if (search-forward lineup (pascal-get-end-of-line) 'move)
	      (forward-char -1))
	  (delete-horizontal-space)
	  (indent-to ind)
	  (if (not (looking-at lineup))
	      (forward-line 1) ; No more indent if there is no : or =
	    (forward-char 1)
	    (delete-horizontal-space)
	    (insert " ")
	    ;; Indent record block
	    (if (looking-at "record\\>")
		(pascal-indent-declaration (current-column)))
	    (forward-line 1)))))

    ;; If arg - move point
    (if arg (forward-line -1)
      (goto-char (marker-position pos)))))

;  "Return the indent level that will line up several lines within the region
;from b to e nicely. The lineup string is str."
(defun pascal-get-lineup-indent (b e str)
  (save-excursion
    (let ((ind 0)
	  (reg (concat str "\\|\\(\\<record\\>\\)"))
	  nest)
      (goto-char b)
      ;; Get rightmost position
      (while (< (point) e)
	(setq nest 1)
	(if (re-search-forward reg (min e (pascal-get-end-of-line 2)) 'move)
1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
	    (progn
	      ;; Skip record blocks
	      (if (match-beginning 1)
		  (pascal-declaration-end)
		(progn
		  (goto-char (match-beginning 0))
		  (skip-chars-backward " \t")
		  (if (> (current-column) ind)
		      (setq ind (current-column)))
		  (goto-char (match-end 0)))))))
Richard M. Stallman's avatar
Richard M. Stallman committed
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081
      ;; In case no lineup was found
      (if (> ind 0)
	  (1+ ind)
	;; No lineup-string found
	(goto-char b)
	(end-of-line)
	(skip-chars-backward " \t")
	(1+ (current-column))))))
    


;;;
;;; Completion
;;;
1082 1083 1084 1085 1086 1087
(defvar pascal-str nil)
(defvar pascal-all nil)
(defvar pascal-pred nil)
(defvar pascal-buffer-to-use nil)
(defvar pascal-flag nil)

Richard M. Stallman's avatar
Richard M. Stallman committed
1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105
(defun pascal-string-diff (str1 str2)
  "Return index of first letter where STR1 and STR2 differs."
  (catch 'done
    (let ((diff 0))
      (while t
	(if (or (> (1+ diff) (length str1))
		(> (1+ diff) (length str2)))
	    (throw 'done diff))
	(or (equal (aref str1 diff) (aref str2 diff))
	    (throw 'done diff))
	(setq diff (1+ diff))))))

;; Calculate all possible completions for functions if argument is `function',
;; completions for procedures if argument is `procedure' or both functions and
;; procedures otherwise.

(defun pascal-func-completion (type)
  ;; Build regular expression for function/procedure names
1106 1107 1108 1109 1110 1111 1112
  (if (string= pascal-str "")
      (setq pascal-str "[a-zA-Z_]"))
  (let ((pascal-str (concat (cond
			     ((eq type 'procedure) "\\<\\(procedure\\)\\s +")
			     ((eq type 'function) "\\<\\(function\\)\\s +")
			     (t "\\<\\(function\\|procedure\\)\\s +"))
			    "\\<\\(" pascal-str "[a-zA-Z0-9_.]*\\)\\>"))
Richard M. Stallman's avatar
Richard M. Stallman committed
1113
	match)
1114
    
Richard M. Stallman's avatar
Richard M. Stallman committed
1115 1116 1117 1118 1119 1120
    (if (not (looking-at "\\<\\(function\\|procedure\\)\\>"))
	(re-search-backward "\\<\\(function\\|procedure\\)\\>" nil t))
    (forward-char 1)

    ;; Search through all reachable functions
    (while (pascal-beg-of-defun)
1121
      (if (re-search-forward pascal-str (pascal-get-end-of-line) t)
Richard M. Stallman's avatar
Richard M. Stallman committed
1122 1123
	  (progn (setq match (buffer-substring (match-beginning 2)
					       (match-end 2)))
1124 1125 1126
		 (if (or (null pascal-pred)
			 (funcall pascal-pred match))
		     (setq pascal-all (cons match pascal-all)))))
Richard M. Stallman's avatar
Richard M. Stallman committed
1127 1128 1129 1130
      (goto-char (match-beginning 0)))))

(defun pascal-get-completion-decl ()
  ;; Macro for searching through current declaration (var, type or const)
1131
  ;; for matches of `str' and adding the occurrence tp `all'
Richard M. Stallman's avatar
Richard M. Stallman committed
1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
  (let ((end (save-excursion (pascal-declaration-end)
			     (point)))
	match)
    ;; Traverse lines
    (while (< (point) end)
      (if (re-search-forward "[:=]" (pascal-get-end-of-line) t)
	  ;; Traverse current line
	  (while (and (re-search-backward 
		       (concat "\\((\\|\\<\\(var\\|type\\|const\\)\\>\\)\\|" 
			       pascal-symbol-re)
		       (pascal-get-beg-of-line) t)
		      (not (match-end 1)))
	    (setq match (buffer-substring (match-beginning 0) (match-end 0)))
1145 1146 1147 1148
	    (if (string-match (concat "\\<" pascal-str) match)
		(if (or (null pascal-pred)
			(funcall pascal-pred match))
		    (setq pascal-all (cons match pascal-all))))))
Richard M. Stallman's avatar
Richard M. Stallman committed
1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164
      (if (re-search-forward "\\<record\\>" (pascal-get-end-of-line) t)
	  (pascal-declaration-end)
	(forward-line 1)))))

(defun pascal-type-completion ()
  "Calculate all possible completions for types."
  (let ((start (point))
	goon)
    ;; Search for all reachable type declarations
    (while (or (pascal-beg-of-defun)
	       (setq goon (not goon)))
      (save-excursion
	(if (and (< start (prog1 (save-excursion (pascal-end-of-defun)
						 (point))
			    (forward-char 1)))
		 (re-search-forward
1165
		  "\\<type\\>\\|\\<\\(begin\\|function\\|procedure\\)\\>"
Richard M. Stallman's avatar
Richard M. Stallman committed
1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180
		  start t)
		 (not (match-end 1)))
	    ;; Check current type declaration
	    (pascal-get-completion-decl))))))

(defun pascal-var-completion ()
  "Calculate all possible completions for variables (or constants)."
  (let ((start (point))
	goon twice)
    ;; Search for all reachable var declarations
    (while (or (pascal-beg-of-defun)
	       (setq goon (not goon)))
      (save-excursion
	(if (> start (prog1 (save-excursion (pascal-end-of-defun)
					    (point))))
1181
	    () ; Declarations not reachable
Richard M. Stallman's avatar
Richard M. Stallman committed
1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200
	  (if (search-forward "(" (pascal-get-end-of-line) t)
	      ;; Check parameterlist
		(pascal-get-completion-decl))
	  (setq twice 2)
	  (while (>= (setq twice (1- twice)) 0)
	    (cond ((and (re-search-forward
			 (concat "\\<\\(var\\|const\\)\\>\\|"
				 "\\<\\(begin\\|function\\|procedure\\)\\>")
			 start t)
			(not (match-end 2)))
		   ;; Check var/const declarations
		   (pascal-get-completion-decl))
		  ((match-end 2)
		   (setq twice 0)))))))))


(defun pascal-keyword-completion (keyword-list)
  "Give list of all possible completions of keywords in KEYWORD-LIST."
  (mapcar '(lambda (s) 
1201 1202 1203 1204
	     (if (string-match (concat "\\<" pascal-str) s)
		 (if (or (null pascal-pred)
			 (funcall pascal-pred s))
		     (setq pascal-all (cons s pascal-all)))))
Richard M. Stallman's avatar
Richard M. Stallman committed
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
	  keyword-list))

;; Function passed to completing-read, try-completion or
;; all-completions to get completion on STR. If predicate is non-nil,
;; it must be a function to be called for every match to check if this
;; should really be a match. If flag is t, the function returns a list
;; of all possible completions. If it is nil it returns a string, the
;; longest possible completion, or t if STR is an exact match. If flag
;; is 'lambda, the function returns t if STR is an exact match, nil
;; otherwise.

1216
(defun pascal-completion (pascal-str pascal-pred pascal-flag)
Richard M. Stallman's avatar
Richard M. Stallman committed
1217
  (save-excursion
1218
    (let ((pascal-all nil))
Richard M. Stallman's avatar
Richard M. Stallman committed
1219
      ;; Set buffer to use for searching labels. This should be set
1220
      ;; within functions which use pascal-completions
1221
      (set-buffer pascal-buffer-to-use)
Richard M. Stallman's avatar
Richard M. Stallman committed
1222 1223 1224 1225 1226 1227 1228

      ;; Determine what should be completed
      (let ((state (car (pascal-calculate-indent))))
	(cond (;--Within a declaration or parameterlist
	       (or (eq state 'declaration) (eq state 'paramlist)
		   (and (eq state 'defun)
			(save-excursion
1229 1230
			  (re-search-backward ")[ \t]*:"
					      (pascal-get-beg-of-line) t))))
Richard M. Stallman's avatar
Richard M. Stallman committed
1231 1232 1233 1234 1235
	       (if (or (eq state 'paramlist) (eq state 'defun))
		   (pascal-beg-of-defun))
	       (pascal-type-completion)
	       (pascal-keyword-completion pascal-type-keywords))
	      (;--Starting a new statement
1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246
	       (and (not (eq state 'contexp))
		    (save-excursion
		      (skip-chars-backward "a-zA-Z0-9_.")
		      (backward-sexp 1)
		      (or (looking-at pascal-nosemi-re)
			  (progn
			    (forward-sexp 1)
			    (looking-at "\\s *\\(;\\|:[^=]\\)")))))
	       (save-excursion (pascal-var-completion))
	       (pascal-func-completion 'procedure)
	       (pascal-keyword-completion pascal-start-keywords))
Richard M. Stallman's avatar
Richard M. Stallman committed
1247 1248 1249
	      (t;--Anywhere else
	       (save-excursion (pascal-var-completion))
	       (pascal-func-completion 'function)
1250
	       (pascal-keyword-completion pascal-separator-keywords))))