pascal.el 53.1 KB
Newer Older
Richard M. Stallman's avatar
Richard M. Stallman committed
1 2
;;; pascal.el  -  Major mode for editing pascal source in emacs.

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

Richard M. Stallman's avatar
Richard M. Stallman committed
5 6
;;; Author: Espen Skoglund (espensk@stud.cs.uit.no)
;;; 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

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

Richard M. Stallman's avatar
Richard M. Stallman committed
15 16 17 18
;;; This program is distributed in the hope that it will be useful,
;;; 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 21 22
;;; You should have received a copy of the GNU General Public License
;;; along with this program; if not, write to the Free Software
;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Richard M. Stallman's avatar
Richard M. Stallman committed
23 24 25 26 27

;;; Commentary:

;;; USAGE
;;; =====
Richard M. Stallman's avatar
Richard M. Stallman committed
28 29 30

;;; 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
Richard M. Stallman's avatar
Richard M. Stallman committed
31
;;; C-h m. You may also get online help describing various functions by:
Richard M. Stallman's avatar
Richard M. Stallman committed
32 33 34 35 36 37 38 39 40 41 42
;;; C-h f <Name of function you want described>

;;; 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
43
;;;       pascal-auto-lineup        '(all)
Richard M. Stallman's avatar
Richard M. Stallman committed
44 45 46 47 48 49
;;;       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")
50
;;;       pascal-separator-keywords '("downto" "else" "mod" "div" "then"))
Richard M. Stallman's avatar
Richard M. Stallman committed
51 52 53 54

;;; KNOWN BUGS / BUGREPORTS
;;; =======================
;;; As far as I know, there are no bugs in the current version of this
Richard M. Stallman's avatar
Richard M. Stallman committed
55 56 57 58 59 60
;;; 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.

;;; Code:
Richard M. Stallman's avatar
Richard M. Stallman committed
61 62 63 64 65 66 67

(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
68 69 70 71 72 73 74
(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)
75
  (define-key pascal-mode-map "#"        'electric-pascal-hash)
Richard M. Stallman's avatar
Richard M. Stallman committed
76 77
  (define-key pascal-mode-map "\r"       'electric-pascal-terminate-line)
  (define-key pascal-mode-map "\t"       'electric-pascal-tab)
78 79
  (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
80
  (define-key pascal-mode-map "\177"     'backward-delete-char-untabify)
81 82
  (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
83 84 85
  (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)
86 87 88 89
  (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
90 91
;;; 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
92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113
;  (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)
  )
  
(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\\)\\>")
114
(defconst pascal-sub-block-re   "\\<\\(if\\|else\\|for\\|while\\|with\\)\\>")
115
(defconst pascal-noindent-re    "\\<\\(begin\\|end\\|until\\|else\\)\\>")
Richard M. Stallman's avatar
Richard M. Stallman committed
116 117 118 119 120 121 122
(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
123 124 125 126 127 128 129

(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))
130
  (modify-syntax-entry ?\\ "."   pascal-mode-syntax-table)
Richard M. Stallman's avatar
Richard M. Stallman committed
131 132
  (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
133
  (modify-syntax-entry ?* ". 23" pascal-mode-syntax-table)
Richard M. Stallman's avatar
Richard M. Stallman committed
134 135 136 137 138 139 140 141 142 143 144 145 146
  (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))

147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167
(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.")

Richard M. Stallman's avatar
Richard M. Stallman committed
168
(defvar pascal-indent-level 3
Richard M. Stallman's avatar
Richard M. Stallman committed
169
  "*Indentation of Pascal statements with respect to containing block.")
170

Richard M. Stallman's avatar
Richard M. Stallman committed
171 172
(defvar pascal-case-indent 2
  "*Indentation for case statements.")
173

Richard M. Stallman's avatar
Richard M. Stallman committed
174 175 176
(defvar pascal-auto-newline nil
  "*Non-nil means automatically newline after simcolons and the punctation mark
after an end.")
177

Richard M. Stallman's avatar
Richard M. Stallman committed
178 179 180
(defvar pascal-tab-always-indent t
  "*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.")
181

Richard M. Stallman's avatar
Richard M. Stallman committed
182 183 184
(defvar pascal-auto-endcomments 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.")
185 186 187 188 189 190 191 192 193

(defvar pascal-auto-lineup '(all)
  "*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)
will do all lineups.")

Richard M. Stallman's avatar
Richard M. Stallman committed
194 195 196 197 198
(defvar pascal-toggle-completions nil
  "*Non-nil means that \\<pascal-mode-map>\\[pascal-complete-label] should \
not display a completion buffer when
the label couldn't be completed, but instead toggle the possible completions
with repeated \\[pascal-complete-label]'s.")
199

Richard M. Stallman's avatar
Richard M. Stallman committed
200 201 202 203 204
(defvar pascal-type-keywords
  '("array" "file" "packed" "char" "integer" "real" "string" "record")
  "*Keywords for types used when completing a word in a declaration or parmlist.
\(eg. integer, real, char.)  The types defined within the Pascal program
will be completed runtime, and should not be added to this list.")
205

Richard M. Stallman's avatar
Richard M. Stallman committed
206 207 208 209 210 211 212
(defvar pascal-start-keywords
  '("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.
\(eg. begin, repeat, until, readln.)
The procedures and variables defined within the Pascal program
will be completed runtime and should not be added to this list.")
213

214
(defvar pascal-separator-keywords
Richard M. Stallman's avatar
Richard M. Stallman committed
215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243
  '("downto" "else" "mod" "div" "then")
  "*Keywords to complete when NOT standing at the first word of a statement.
\(eg. downto, else, mod, then.) 
Variables and function names defined within the
Pascal program are completed runtime and should not be added to this list.")

;;;
;;;  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)))
	    ((match-beginning 2) (setq nest (1- nest)))))))

244

Richard M. Stallman's avatar
Richard M. Stallman committed
245 246 247
(defun pascal-declaration-beg ()
  (let ((nest 1))
    (while (and (> nest 0)
248
		(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
249 250 251 252
      (cond ((match-beginning 1) (setq nest 0))
	    ((match-beginning 2) (setq nest (1- nest)))
	    ((match-beginning 3) (setq nest (1+ nest)))))
    (= nest 0)))
253

Richard M. Stallman's avatar
Richard M. Stallman committed
254 255 256 257 258
  
(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
259 260 261

;;;###autoload
(defun pascal-mode ()
Richard M. Stallman's avatar
Richard M. Stallman committed
262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290
  "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)
    Non-nil means automatically newline after simcolons and the punctation mark
    after an end.
291
 pascal-tab-always-indent (default t)
Richard M. Stallman's avatar
Richard M. Stallman committed
292 293
    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
294 295 296
 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.
297 298
 pascal-auto-lineup       (default t)
    List of contexts where auto lineup of :'s or ='s hould be done.
Richard M. Stallman's avatar
Richard M. Stallman committed
299 300

See also the user variables pascal-type-keywords, pascal-start-keywords and
301
pascal-separator-keywords.
Richard M. Stallman's avatar
Richard M. Stallman committed
302 303 304 305 306 307 308 309 310 311 312 313

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)
Richard M. Stallman's avatar
Richard M. Stallman committed
314
  (setq comment-indent-function 'pascal-indent-comment)
Richard M. Stallman's avatar
Richard M. Stallman committed
315
  (make-local-variable 'parse-sexp-ignore-comments)
316
  (setq parse-sexp-ignore-comments nil)
Richard M. Stallman's avatar
Richard M. Stallman committed
317 318
  (make-local-variable 'case-fold-search)
  (setq case-fold-search t)
319 320 321 322
  (make-local-variable 'comment-start-skip)
  (setq comment-start-skip "(\\*+ *\\|{ *")
  (make-local-variable 'comment-end)
  (setq comment-end "}")
323 324
  (make-local-variable 'font-lock-defaults)
  (setq font-lock-defaults '(pascal-font-lock-keywords nil t))
Richard M. Stallman's avatar
Richard M. Stallman committed
325 326
  (run-hooks 'pascal-mode-hook))

Richard M. Stallman's avatar
Richard M. Stallman committed
327 328


Richard M. Stallman's avatar
Richard M. Stallman committed
329 330 331 332 333 334
;;;
;;;  Electric functions
;;;
(defun electric-pascal-terminate-line ()
  "Terminate line and indent next line."
  (interactive)
Richard M. Stallman's avatar
Richard M. Stallman committed
335
  ;; First, check if current line should be indented
Richard M. Stallman's avatar
Richard M. Stallman committed
336 337 338
  (save-excursion
    (beginning-of-line)
    (skip-chars-forward " \t")
Richard M. Stallman's avatar
Richard M. Stallman committed
339
    (if (looking-at pascal-autoindent-lines-re)
Richard M. Stallman's avatar
Richard M. Stallman committed
340
	(pascal-indent-line)))
Richard M. Stallman's avatar
Richard M. Stallman committed
341
  (delete-horizontal-space) ; Removes trailing whitespaces
Richard M. Stallman's avatar
Richard M. Stallman committed
342
  (newline)
Richard M. Stallman's avatar
Richard M. Stallman committed
343
  ;; Indent next line
Richard M. Stallman's avatar
Richard M. Stallman committed
344 345 346 347 348 349 350 351 352
  (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
353
      (cond ((looking-at "\\*[ \t]+)")
Richard M. Stallman's avatar
Richard M. Stallman committed
354 355
	     ;; Delete region between `*' and `)' if there is only whitespaces.
	     (forward-char 1)
Richard M. Stallman's avatar
Richard M. Stallman committed
356
	     (delete-horizontal-space))
Richard M. Stallman's avatar
Richard M. Stallman committed
357 358 359 360 361
	    ((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
362 363 364
    (if (null setstar)	
	(pascal-indent-line)
      (insert "*  "))))
Richard M. Stallman's avatar
Richard M. Stallman committed
365 366


Richard M. Stallman's avatar
Richard M. Stallman committed
367 368
(defun electric-pascal-semi-or-dot ()
  "Insert `;' or `.' character and reindent the line."
Richard M. Stallman's avatar
Richard M. Stallman committed
369 370 371 372 373 374 375 376 377
  (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
378
  "Insert `:' and do all indentions except line indent on this line."
Richard M. Stallman's avatar
Richard M. Stallman committed
379 380
  (interactive)
  (insert last-command-char)
Richard M. Stallman's avatar
Richard M. Stallman committed
381 382 383 384 385 386 387 388 389
  ;; 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
390
(defun electric-pascal-equal ()
Richard M. Stallman's avatar
Richard M. Stallman committed
391
  "Insert `=', and do indention if within type declaration."
Richard M. Stallman's avatar
Richard M. Stallman committed
392 393
  (interactive)
  (insert last-command-char)
Richard M. Stallman's avatar
Richard M. Stallman committed
394
  (if (eq (car (pascal-calculate-indent)) 'declaration)
Richard M. Stallman's avatar
Richard M. Stallman committed
395 396 397
      (let ((pascal-tab-always-indent nil))
	(pascal-indent-command))))

398 399 400 401 402 403 404 405
(defun electric-pascal-hash ()
  "Insert `#', and indent to coulmn 0 if this is a CPP directive."
  (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
406
(defun electric-pascal-tab ()
Richard M. Stallman's avatar
Richard M. Stallman committed
407
  "Function called when TAB is pressed in Pascal mode."
Richard M. Stallman's avatar
Richard M. Stallman committed
408
  (interactive)
409 410 411 412
  ;; 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
413 414 415 416 417 418 419 420 421 422
      (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))
      (insert "\t"))
    (pascal-indent-command)))


Richard M. Stallman's avatar
Richard M. Stallman committed
423 424 425 426 427

;;;
;;; Interactive functions
;;;
(defun pascal-insert-block ()
Richard M. Stallman's avatar
Richard M. Stallman committed
428
  "Insert Pascal begin ... end; block in the code with right indentation."
Richard M. Stallman's avatar
Richard M. Stallman committed
429 430 431 432 433 434 435 436 437 438 439
  (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
440
  "Insert Pascal star comment at point."
Richard M. Stallman's avatar
Richard M. Stallman committed
441 442 443 444 445 446
  (interactive)
  (pascal-indent-line)
  (insert "(*")
  (electric-pascal-terminate-line)
  (save-excursion
    (electric-pascal-terminate-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
447 448 449
    (delete-horizontal-space)
    (insert ")"))
  (insert "  "))
Richard M. Stallman's avatar
Richard M. Stallman committed
450

Richard M. Stallman's avatar
Richard M. Stallman committed
451
(defun pascal-mark-defun ()
Richard M. Stallman's avatar
Richard M. Stallman committed
452
  "Mark the current pascal function (or procedure).
Richard M. Stallman's avatar
Richard M. Stallman committed
453
This puts the mark at the end, and point at the beginning."
Richard M. Stallman's avatar
Richard M. Stallman committed
454 455
  (interactive)
  (push-mark (point))
Richard M. Stallman's avatar
Richard M. Stallman committed
456
  (pascal-end-of-defun)
Richard M. Stallman's avatar
Richard M. Stallman committed
457
  (push-mark (point))
Richard M. Stallman's avatar
Richard M. Stallman committed
458 459 460
  (pascal-beg-of-defun)
  (if (fboundp 'zmacs-activate-region)
      (zmacs-activate-region)))
Richard M. Stallman's avatar
Richard M. Stallman committed
461 462

(defun pascal-comment-area (start end)
Richard M. Stallman's avatar
Richard M. Stallman committed
463 464 465 466 467 468 469 470 471
  "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
472 473 474 475 476 477 478 479
  (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
480
    (insert pascal-exclude-str-end)
Richard M. Stallman's avatar
Richard M. Stallman committed
481 482 483 484
    (setq end (point))
    (newline)
    (goto-char start)
    (beginning-of-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
485
    (insert pascal-exclude-str-start)
Richard M. Stallman's avatar
Richard M. Stallman committed
486 487 488 489 490 491 492 493 494 495 496
    (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
497 498
  "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
499 500 501 502 503 504 505
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
506
	(setq start (progn (search-backward pascal-exclude-str-start nil t)
Richard M. Stallman's avatar
Richard M. Stallman committed
507
			   (point)))
Richard M. Stallman's avatar
Richard M. Stallman committed
508
	(setq end (progn (search-forward pascal-exclude-str-end nil t)
Richard M. Stallman's avatar
Richard M. Stallman committed
509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533
			 (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
534 535
(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
536
  (interactive)
Richard M. Stallman's avatar
Richard M. Stallman committed
537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565
  (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
566
  (interactive)
Richard M. Stallman's avatar
Richard M. Stallman committed
567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594
  (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
595

596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632
(defun pascal-end-of-statement ()
  "Move forward to end of current statement."
  (interactive)
  (let ((nest 0) pos
	(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
633
(defun pascal-downcase-keywords ()
Richard M. Stallman's avatar
Richard M. Stallman committed
634
  "Downcase all Pascal keywords in the buffer."
Richard M. Stallman's avatar
Richard M. Stallman committed
635 636 637 638
  (interactive)
  (pascal-change-keywords 'downcase-word))

(defun pascal-upcase-keywords ()
Richard M. Stallman's avatar
Richard M. Stallman committed
639
  "Upcase all Pascal keywords in the buffer."
Richard M. Stallman's avatar
Richard M. Stallman committed
640 641 642 643
  (interactive)
  (pascal-change-keywords 'upcase-word))

(defun pascal-capitalize-keywords ()
Richard M. Stallman's avatar
Richard M. Stallman committed
644
  "Capitalize all Pascal keywords in the buffer."
Richard M. Stallman's avatar
Richard M. Stallman committed
645 646 647
  (interactive)
  (pascal-change-keywords 'capitalize-word))

Richard M. Stallman's avatar
Richard M. Stallman committed
648
;; Change the keywords according to argument.
Richard M. Stallman's avatar
Richard M. Stallman committed
649 650
(defun pascal-change-keywords (change-word)
  (save-excursion
Richard M. Stallman's avatar
Richard M. Stallman committed
651 652 653 654 655 656 657 658
    (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
659 660 661 662 663

;;;
;;; Other functions
;;;
(defun pascal-set-auto-comments ()
Richard M. Stallman's avatar
Richard M. Stallman committed
664 665 666 667
  "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
668 669 670
  (save-excursion
    (forward-line -1)
    (skip-chars-forward " \t")
Richard M. Stallman's avatar
Richard M. Stallman committed
671
    (if (and (looking-at "\\<end;")
Richard M. Stallman's avatar
Richard M. Stallman committed
672 673
	     (not (save-excursion
		    (end-of-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
674
		    (search-backward "{" (pascal-get-beg-of-line) t))))
675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709
	(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
710

Richard M. Stallman's avatar
Richard M. Stallman committed
711 712


Richard M. Stallman's avatar
Richard M. Stallman committed
713
;;;
Richard M. Stallman's avatar
Richard M. Stallman committed
714 715 716 717 718
;;; Indentation
;;;
(defconst pascal-indent-alist
  '((block . (+ ind pascal-indent-level))
    (case . (+ ind pascal-case-indent))
719
    (caseblock . ind) (cpp . 0)
Richard M. Stallman's avatar
Richard M. Stallman committed
720 721 722 723 724 725
    (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
726
(defun pascal-indent-command ()
Richard M. Stallman's avatar
Richard M. Stallman committed
727 728 729 730
  "Indent for special part of code."
  (let* ((indent-str (pascal-calculate-indent))
	 (type (car indent-str))
	 (ind (car (cdr indent-str))))
731 732 733
    (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
734 735
	   (pascal-indent-paramlist)
	   (pascal-indent-paramlist))
736 737 738
	  ((and (eq type 'declaration)
		(or (memq 'all pascal-auto-lineup)
		    (memq 'declaration  pascal-auto-lineup)))
Richard M. Stallman's avatar
Richard M. Stallman committed
739
	   (pascal-indent-declaration))
740 741 742
	  ((and (eq type 'case) (not (looking-at "^[ \t]*$"))
		(or (memq 'all pascal-auto-lineup)
		    (memq 'case pascal-auto-lineup)))
Richard M. Stallman's avatar
Richard M. Stallman committed
743 744 745
	   (pascal-indent-case)))
    (if (looking-at "[ \t]+$")
	(skip-chars-forward " \t"))))
Richard M. Stallman's avatar
Richard M. Stallman committed
746 747

(defun pascal-indent-line ()
Richard M. Stallman's avatar
Richard M. Stallman committed
748 749 750 751 752 753 754
  "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)
755
    ;; Some things should not be indented
Richard M. Stallman's avatar
Richard M. Stallman committed
756
    (if (or (and (eq type 'declaration) (looking-at pascal-declaration-re))
757
	    (eq type 'cpp)
Richard M. Stallman's avatar
Richard M. Stallman committed
758 759 760 761 762 763 764 765 766 767 768 769 770 771 772
	    (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
    (let* ((oldpos (point))
	   (state (save-excursion (parse-partial-sexp (point-min) (point))))
773
	   (nest 0) (par 0) (complete (looking-at "[ \t]*end\\>"))
774
	   (elsed (looking-at "[ \t]*else\\>"))
Richard M. Stallman's avatar
Richard M. Stallman committed
775 776 777 778 779 780
	   (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)))
781 782 783 784
			  (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
785 786 787
		   ;; Loop until correct indent is found
		   (while t
		     (backward-sexp 1)
788 789 790 791 792 793 794 795 796 797 798 799 800 801
		     (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
802 803 804 805 806 807
			    (looking-at pascal-beg-block-re)
			    (if (= nest 0)
				(cond ((looking-at "case\\>")
				       (throw 'nesting 'case))
				      ((looking-at "record\\>")
				       (throw 'nesting 'declaration))
808
				      (t (throw 'nesting 'block)))
Richard M. Stallman's avatar
Richard M. Stallman committed
809 810 811
			      (setq nest (1- nest))))
			   (;--Nest block inwards
			    (looking-at pascal-end-block-re)
812 813 814
			    (if (and (looking-at "end\\s ")
				     elsed (not complete))
				(throw 'nesting 'block))
Richard M. Stallman's avatar
Richard M. Stallman committed
815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832
			    (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)
833 834 835 836
			    (if (save-excursion
				  (goto-char oldpos)
				  (forward-line -1)
				  (looking-at "^[ \t]*$"))
Richard M. Stallman's avatar
Richard M. Stallman committed
837 838 839 840 841 842 843 844 845 846 847 848 849 850
				(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))
			   )))))
851

Richard M. Stallman's avatar
Richard M. Stallman committed
852 853 854 855 856 857 858 859
      ;; 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
860 861
  (save-excursion
    (beginning-of-line)
Richard M. Stallman's avatar
Richard M. Stallman committed
862 863 864 865
    (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
866 867 868
    (skip-chars-forward " \t")
    (current-column)))

Richard M. Stallman's avatar
Richard M. Stallman committed
869 870 871 872 873 874 875 876 877 878 879 880 881 882
(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."
  (skip-chars-forward ": \t")
883 884 885
  (let ((end (prog2
		 (end-of-line)
		 (point-marker)
Richard M. Stallman's avatar
Richard M. Stallman committed
886
	       (re-search-backward "\\<case\\>" nil t)))
887
	(beg (point)) oldpos
Richard M. Stallman's avatar
Richard M. Stallman committed
888 889 890
	(ind 0))
    ;; Get right indent
    (while (< (point) (marker-position end))
891 892 893 894
      (if (re-search-forward 
	   "^[ \t]*[^ \t,:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
	   (marker-position end) 'move)
	  (forward-char -1))
Richard M. Stallman's avatar
Richard M. Stallman committed
895 896 897
      (delete-horizontal-space)
      (if (> (current-column) ind)
	  (setq ind (current-column)))
898
      (pascal-end-of-statement))
Richard M. Stallman's avatar
Richard M. Stallman committed
899
    (goto-char beg)
900
    (setq oldpos (marker-position end))
Richard M. Stallman's avatar
Richard M. Stallman committed
901 902
    ;; Indent all case statements
    (while (< (point) (marker-position end))
903
      (if (re-search-forward
904
	   "^[ \t]*[^][ \t,\\.:]+[ \t]*\\(,[ \t]*[^ \t,:]+[ \t]*\\)*:"
905
	   (marker-position end) 'move)
Richard M. Stallman's avatar
Richard M. Stallman committed
906 907 908 909 910 911
	  (forward-char -1))
      (indent-to (1+ ind))
      (if (/= (following-char) ?:)
	  ()
	(forward-char 1)
	(delete-horizontal-space)
912 913 914 915
	(insert " "))
      (setq oldpos (point))
      (pascal-end-of-statement))
    (goto-char oldpos)))
Richard M. Stallman's avatar
Richard M. Stallman committed
916 917 918 919 920

(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
921
  (save-excursion
Richard M. Stallman's avatar
Richard M. Stallman committed
922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002
    (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)
	(while (<= (point) (marker-position edpos))
	  (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)
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012
	    (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
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026
      ;; 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
;;;
1027 1028 1029 1030 1031 1032
(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
1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050
(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
1051 1052 1053 1054 1055 1056 1057
  (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
1058
	match)
1059
    
Richard M. Stallman's avatar
Richard M. Stallman committed
1060 1061 1062 1063 1064 1065
    (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)
1066
      (if (re-search-forward pascal-str (pascal-get-end-of-line) t)
Richard M. Stallman's avatar
Richard M. Stallman committed
1067 1068
	  (progn (setq match (buffer-substring (match-beginning 2)
					       (match-end 2)))
1069 1070 1071
		 (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
1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
      (goto-char (match-beginning 0)))))

(defun pascal-get-completion-decl ()
  ;; Macro for searching through current declaration (var, type or const)
  ;; for matches of `str' and adding the occurence tp `all'
  (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)))
1090 1091 1092 1093
	    (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
1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
      (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
1110
		  "\\<type\\>\\|\\<\\(begin\\|function\\|procedure\\)\\>"
Richard M. Stallman's avatar
Richard M. Stallman committed
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145
		  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))))
	    () ; Declarations not reacable
	  (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) 
1146 1147 1148 1149
	     (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
1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
	  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.

1161
(defun pascal-completion (pascal-str pascal-pred pascal-flag)
Richard M. Stallman's avatar
Richard M. Stallman committed
1162
  (save-excursion
1163
    (let ((pascal-all nil))
Richard M. Stallman's avatar
Richard M. Stallman committed
1164 1165
      ;; Set buffer to use for searching labels. This should be set
      ;; within functins which use pascal-completions
1166
      (set-buffer pascal-buffer-to-use)
Richard M. Stallman's avatar
Richard M. Stallman committed
1167 1168 1169 1170 1171 1172 1173

      ;; 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
1174 1175
			  (re-search-backward ")[ \t]*:"
					      (pascal-get-beg-of-line) t))))
Richard M. Stallman's avatar
Richard M. Stallman committed
1176 1177 1178 1179 1180
	       (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
1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191
	       (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
1192 1193 1194
	      (t;--Anywhere else
	       (save-excursion (pascal-var-completion))
	       (pascal-func-completion 'function)
1195
	       (pascal-keyword-completion pascal-separator-keywords))))
1196
      
Richard M. Stallman's avatar
Richard M. Stallman committed
1197 1198 1199 1200
      ;; Now we have built a list of all matches. Give response to caller
      (pascal-completion-response))))

(defun pascal-completion-response ()
1201
  (cond ((or (equal pascal-flag 'lambda) (null pascal-flag))
Richard M. Stallman's avatar
Richard M. Stallman committed
1202
	 ;; This was not called by all-completions
1203
	 (if (null pascal-all)
Richard M. Stallman's avatar
Richard M. Stallman committed
1204 1205 1206
	     ;; Return nil if there was no matching label
	     nil
	   ;; Get longest string common in the labels
1207 1208
	   (let* ((elm (cdr pascal-all))
		  (match (car pascal-all))
Richard M. Stallman's avatar
Richard M. Stallman committed
1209 1210
		  (min (length match))
		  exact tmp)
1211
	     (if (string= match pascal-str)
Richard M. Stallman's avatar
Richard M. Stallman committed
1212 1213 1214 1215 1216 1217 1218 1219 1220
		 ;; Return t if first match was an exact match
		 (setq match t)
	       (while (not (null elm))
		 ;; Find longest common string
		 (if (< (setq tmp (pascal-string-diff match (car elm))) min)
		     (progn
		       (setq min tmp)
		       (setq match (substring match 0 min))))
		 ;; Terminate with match=t if this is an exact match
1221
		 (if (string= (car elm) pascal-str)
Richard M. Stallman's avatar
Richard M. Stallman committed
1222 1223 1224 1225 1226
		     (progn
		       (setq match t)
		       (setq elm nil))
		   (setq elm (cdr elm)))))
	     ;; If this is a test just for exact match, return nil ot t
1227
	     (if (and (equal pascal-flag 'lambda) (not (equal match 't)))
Richard M. Stallman's avatar
Richard M. Stallman committed
1228 1229 1230 1231
		 nil
	       match))))
	;; If flag is t, this was called by all-completions. Return
	;; list of all possible completions
1232 1233
	(pascal-flag
	 pascal-all)))
Richard M. Stallman's avatar
Richard M. Stallman committed
1234 1235 1236 1237 1238 1239 1240 1241

(defvar pascal-last-word-numb 0)
(defvar pascal-last-word-shown nil)
(defvar pascal-last-completions nil)

(defun pascal-complete-word ()
  "Complete word at current point.
\(See also `pascal-toggle-completions', `pascal-type-keywords',
1242
`pascal-start-keywords' and `pascal-separator-keywords'.)"
Richard M. Stallman's avatar
Richard M. Stallman committed
1243 1244 1245
  (interactive)
  (let* ((b (save-excursion (skip-chars-backward "a-zA-Z0-9_") (point)))
	 (e (save-excursion (skip-chars-forward "a-zA-Z0-9_") (point)))
1246
	 (pascal-str (buffer-substring b e))
Richard M. Stallman's avatar
Richard M. Stallman committed
1247
	 ;; The following variable is used in pascal-completion
1248
	 (pascal-buffer-to-use (current-buffer))
Richard M. Stallman's avatar
Richard M. Stallman committed
1249
	 (allcomp (if (and pascal-toggle-completions
1250
			   (string= pascal-last-word-shown pascal-str))
Richard M. Stallman's avatar
Richard M. Stallman committed
1251
		      pascal-last-completions
1252
		    (all-completions pascal-str 'pascal-completion)))
Richard M. Stallman's avatar
Richard M. Stallman committed
1253 1254
	 (match (if pascal-toggle-completions
		    "" (try-completion
1255 1256
			pascal-str (mapcar '(lambda (elm)
					      (cons elm 0)) allcomp)))))
Richard M. Stallman's avatar
Richard M. Stallman committed
1257 1258 1259 1260 1261
    ;; Delete old string
    (delete-region b e)

    ;; Toggle-completions inserts whole labels
    (if pascal-toggle-completions
Richard M. Stallman's avatar
Richard M. Stallman committed
1262
	(progn
Richard M. Stallman's avatar
Richard M. Stallman committed
1263 1264 1265 1266 1267 1268 1269 1270 1271 1272