| 1 | ;;; scheme.el --- Scheme mode, and its idiosyncratic commands. |
| 2 | |
| 3 | ;; Author: Bill Rozas <jinz@prep.ai.mit.edu> |
| 4 | ;; Last-Modified: 16 Mar 1992 |
| 5 | |
| 6 | ;;; $Header: scheme.el,v 1.7 88/07/15 20:20:00 GMT cph Exp $ |
| 7 | |
| 8 | ;; Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc. |
| 9 | |
| 10 | ;; This file is part of GNU Emacs. |
| 11 | |
| 12 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
| 13 | ;; it under the terms of the GNU General Public License as published by |
| 14 | ;; the Free Software Foundation; either version 2, or (at your option) |
| 15 | ;; any later version. |
| 16 | |
| 17 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | ;; GNU General Public License for more details. |
| 21 | |
| 22 | ;; You should have received a copy of the GNU General Public License |
| 23 | ;; along with GNU Emacs; see the file COPYING. If not, write to |
| 24 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | |
| 26 | ;;; Commentary: |
| 27 | |
| 28 | ;; Adapted from Lisp mode by Bill Rozas, jinx@prep. |
| 29 | ;; Initially a query replace of Lisp mode, except for the indentation |
| 30 | ;; of special forms. Probably the code should be merged at some point |
| 31 | ;; so that there is sharing between both libraries. |
| 32 | |
| 33 | ;;; Code: |
| 34 | \f |
| 35 | (defvar scheme-mode-syntax-table nil "") |
| 36 | (if (not scheme-mode-syntax-table) |
| 37 | (let ((i 0)) |
| 38 | (setq scheme-mode-syntax-table (make-syntax-table)) |
| 39 | (set-syntax-table scheme-mode-syntax-table) |
| 40 | |
| 41 | ;; Default is atom-constituent. |
| 42 | (while (< i 256) |
| 43 | (modify-syntax-entry i "_ ") |
| 44 | (setq i (1+ i))) |
| 45 | |
| 46 | ;; Word components. |
| 47 | (setq i ?0) |
| 48 | (while (<= i ?9) |
| 49 | (modify-syntax-entry i "w ") |
| 50 | (setq i (1+ i))) |
| 51 | (setq i ?A) |
| 52 | (while (<= i ?Z) |
| 53 | (modify-syntax-entry i "w ") |
| 54 | (setq i (1+ i))) |
| 55 | (setq i ?a) |
| 56 | (while (<= i ?z) |
| 57 | (modify-syntax-entry i "w ") |
| 58 | (setq i (1+ i))) |
| 59 | |
| 60 | ;; Whitespace |
| 61 | (modify-syntax-entry ?\t " ") |
| 62 | (modify-syntax-entry ?\n "> ") |
| 63 | (modify-syntax-entry ?\f " ") |
| 64 | (modify-syntax-entry ?\r " ") |
| 65 | (modify-syntax-entry ? " ") |
| 66 | |
| 67 | ;; These characters are delimiters but otherwise undefined. |
| 68 | ;; Brackets and braces balance for editing convenience. |
| 69 | (modify-syntax-entry ?[ "(] ") |
| 70 | (modify-syntax-entry ?] ")[ ") |
| 71 | (modify-syntax-entry ?{ "(} ") |
| 72 | (modify-syntax-entry ?} "){ ") |
| 73 | (modify-syntax-entry ?\| " 23") |
| 74 | |
| 75 | ;; Other atom delimiters |
| 76 | (modify-syntax-entry ?\( "() ") |
| 77 | (modify-syntax-entry ?\) ")( ") |
| 78 | (modify-syntax-entry ?\; "< ") |
| 79 | (modify-syntax-entry ?\" "\" ") |
| 80 | (modify-syntax-entry ?' " p") |
| 81 | (modify-syntax-entry ?` " p") |
| 82 | |
| 83 | ;; Special characters |
| 84 | (modify-syntax-entry ?, "_ p") |
| 85 | (modify-syntax-entry ?@ "_ p") |
| 86 | (modify-syntax-entry ?# "_ p14") |
| 87 | (modify-syntax-entry ?\\ "\\ "))) |
| 88 | \f |
| 89 | (defvar scheme-mode-abbrev-table nil "") |
| 90 | (define-abbrev-table 'scheme-mode-abbrev-table ()) |
| 91 | |
| 92 | (defun scheme-mode-variables () |
| 93 | (set-syntax-table scheme-mode-syntax-table) |
| 94 | (setq local-abbrev-table scheme-mode-abbrev-table) |
| 95 | (make-local-variable 'paragraph-start) |
| 96 | (setq paragraph-start (concat "^$\\|" page-delimiter)) |
| 97 | (make-local-variable 'paragraph-separate) |
| 98 | (setq paragraph-separate paragraph-start) |
| 99 | (make-local-variable 'paragraph-ignore-fill-prefix) |
| 100 | (setq paragraph-ignore-fill-prefix t) |
| 101 | (make-local-variable 'indent-line-function) |
| 102 | (setq indent-line-function 'scheme-indent-line) |
| 103 | (make-local-variable 'comment-start) |
| 104 | (setq comment-start ";") |
| 105 | (make-local-variable 'comment-start-skip) |
| 106 | (setq comment-start-skip ";+[ \t]*") |
| 107 | (make-local-variable 'comment-column) |
| 108 | (setq comment-column 40) |
| 109 | (make-local-variable 'comment-indent-hook) |
| 110 | (setq comment-indent-hook 'scheme-comment-indent) |
| 111 | (setq mode-line-process '("" scheme-mode-line-process))) |
| 112 | |
| 113 | (defvar scheme-mode-line-process "") |
| 114 | |
| 115 | (defun scheme-mode-commands (map) |
| 116 | (define-key map "\t" 'scheme-indent-line) |
| 117 | (define-key map "\177" 'backward-delete-char-untabify) |
| 118 | (define-key map "\e\C-q" 'scheme-indent-sexp)) |
| 119 | |
| 120 | (defvar scheme-mode-map nil) |
| 121 | (if (not scheme-mode-map) |
| 122 | (progn |
| 123 | (setq scheme-mode-map (make-sparse-keymap)) |
| 124 | (scheme-mode-commands scheme-mode-map))) |
| 125 | \f |
| 126 | ;;;###autoload |
| 127 | (defun scheme-mode () |
| 128 | "Major mode for editing Scheme code. |
| 129 | Editing commands are similar to those of lisp-mode. |
| 130 | |
| 131 | In addition, if an inferior Scheme process is running, some additional |
| 132 | commands will be defined, for evaluating expressions and controlling |
| 133 | the interpreter, and the state of the process will be displayed in the |
| 134 | modeline of all Scheme buffers. The names of commands that interact |
| 135 | with the Scheme process start with \"xscheme-\". For more information |
| 136 | see the documentation for xscheme-interaction-mode. |
| 137 | |
| 138 | Commands: |
| 139 | Delete converts tabs to spaces as it moves back. |
| 140 | Blank lines separate paragraphs. Semicolons start comments. |
| 141 | \\{scheme-mode-map} |
| 142 | Entry to this mode calls the value of scheme-mode-hook |
| 143 | if that value is non-nil." |
| 144 | (interactive) |
| 145 | (kill-all-local-variables) |
| 146 | (scheme-mode-initialize) |
| 147 | (scheme-mode-variables) |
| 148 | (run-hooks 'scheme-mode-hook)) |
| 149 | |
| 150 | (defun scheme-mode-initialize () |
| 151 | (use-local-map scheme-mode-map) |
| 152 | (setq major-mode 'scheme-mode) |
| 153 | (setq mode-name "Scheme")) |
| 154 | |
| 155 | (defvar scheme-mit-dialect t |
| 156 | "If non-nil, scheme mode is specialized for MIT Scheme. |
| 157 | Set this to nil if you normally use another dialect.") |
| 158 | \f |
| 159 | (defun scheme-comment-indent (&optional pos) |
| 160 | (save-excursion |
| 161 | (if pos (goto-char pos)) |
| 162 | (cond ((looking-at ";;;") (current-column)) |
| 163 | ((looking-at ";;") |
| 164 | (let ((tem (calculate-scheme-indent))) |
| 165 | (if (listp tem) (car tem) tem))) |
| 166 | (t |
| 167 | (skip-chars-backward " \t") |
| 168 | (max (if (bolp) 0 (1+ (current-column))) |
| 169 | comment-column))))) |
| 170 | |
| 171 | (defvar scheme-indent-offset nil "") |
| 172 | (defvar scheme-indent-function 'scheme-indent-function "") |
| 173 | |
| 174 | (defun scheme-indent-line (&optional whole-exp) |
| 175 | "Indent current line as Scheme code. |
| 176 | With argument, indent any additional lines of the same expression |
| 177 | rigidly along with this one." |
| 178 | (interactive "P") |
| 179 | (let ((indent (calculate-scheme-indent)) shift-amt beg end |
| 180 | (pos (- (point-max) (point)))) |
| 181 | (beginning-of-line) |
| 182 | (setq beg (point)) |
| 183 | (skip-chars-forward " \t") |
| 184 | (if (looking-at "[ \t]*;;;") |
| 185 | ;; Don't alter indentation of a ;;; comment line. |
| 186 | nil |
| 187 | (if (listp indent) (setq indent (car indent))) |
| 188 | (setq shift-amt (- indent (current-column))) |
| 189 | (if (zerop shift-amt) |
| 190 | nil |
| 191 | (delete-region beg (point)) |
| 192 | (indent-to indent)) |
| 193 | ;; If initial point was within line's indentation, |
| 194 | ;; position after the indentation. Else stay at same point in text. |
| 195 | (if (> (- (point-max) pos) (point)) |
| 196 | (goto-char (- (point-max) pos))) |
| 197 | ;; If desired, shift remaining lines of expression the same amount. |
| 198 | (and whole-exp (not (zerop shift-amt)) |
| 199 | (save-excursion |
| 200 | (goto-char beg) |
| 201 | (forward-sexp 1) |
| 202 | (setq end (point)) |
| 203 | (goto-char beg) |
| 204 | (forward-line 1) |
| 205 | (setq beg (point)) |
| 206 | (> end beg)) |
| 207 | (indent-code-rigidly beg end shift-amt))))) |
| 208 | \f |
| 209 | (defun calculate-scheme-indent (&optional parse-start) |
| 210 | "Return appropriate indentation for current line as scheme code. |
| 211 | In usual case returns an integer: the column to indent to. |
| 212 | Can instead return a list, whose car is the column to indent to. |
| 213 | This means that following lines at the same level of indentation |
| 214 | should not necessarily be indented the same way. |
| 215 | The second element of the list is the buffer position |
| 216 | of the start of the containing expression." |
| 217 | (save-excursion |
| 218 | (beginning-of-line) |
| 219 | (let ((indent-point (point)) state paren-depth desired-indent (retry t) |
| 220 | last-sexp containing-sexp first-sexp-list-p) |
| 221 | (if parse-start |
| 222 | (goto-char parse-start) |
| 223 | (beginning-of-defun)) |
| 224 | ;; Find outermost containing sexp |
| 225 | (while (< (point) indent-point) |
| 226 | (setq state (parse-partial-sexp (point) indent-point 0))) |
| 227 | ;; Find innermost containing sexp |
| 228 | (while (and retry (setq paren-depth (car state)) (> paren-depth 0)) |
| 229 | (setq retry nil) |
| 230 | (setq last-sexp (nth 2 state)) |
| 231 | (setq containing-sexp (car (cdr state))) |
| 232 | ;; Position following last unclosed open. |
| 233 | (goto-char (1+ containing-sexp)) |
| 234 | ;; Is there a complete sexp since then? |
| 235 | (if (and last-sexp (> last-sexp (point))) |
| 236 | ;; Yes, but is there a containing sexp after that? |
| 237 | (let ((peek (parse-partial-sexp last-sexp indent-point 0))) |
| 238 | (if (setq retry (car (cdr peek))) (setq state peek)))) |
| 239 | (if (not retry) |
| 240 | ;; Innermost containing sexp found |
| 241 | (progn |
| 242 | (goto-char (1+ containing-sexp)) |
| 243 | (if (not last-sexp) |
| 244 | ;; indent-point immediately follows open paren. |
| 245 | ;; Don't call hook. |
| 246 | (setq desired-indent (current-column)) |
| 247 | ;; Move to first sexp after containing open paren |
| 248 | (parse-partial-sexp (point) last-sexp 0 t) |
| 249 | (setq first-sexp-list-p (looking-at "\\s(")) |
| 250 | (cond |
| 251 | ((> (save-excursion (forward-line 1) (point)) |
| 252 | last-sexp) |
| 253 | ;; Last sexp is on same line as containing sexp. |
| 254 | ;; It's almost certainly a function call. |
| 255 | (parse-partial-sexp (point) last-sexp 0 t) |
| 256 | (if (/= (point) last-sexp) |
| 257 | ;; Indent beneath first argument or, if only one sexp |
| 258 | ;; on line, indent beneath that. |
| 259 | (progn (forward-sexp 1) |
| 260 | (parse-partial-sexp (point) last-sexp 0 t))) |
| 261 | (backward-prefix-chars)) |
| 262 | (t |
| 263 | ;; Indent beneath first sexp on same line as last-sexp. |
| 264 | ;; Again, it's almost certainly a function call. |
| 265 | (goto-char last-sexp) |
| 266 | (beginning-of-line) |
| 267 | (parse-partial-sexp (point) last-sexp 0 t) |
| 268 | (backward-prefix-chars))))))) |
| 269 | ;; If looking at a list, don't call hook. |
| 270 | (if first-sexp-list-p |
| 271 | (setq desired-indent (current-column))) |
| 272 | ;; Point is at the point to indent under unless we are inside a string. |
| 273 | ;; Call indentation hook except when overriden by scheme-indent-offset |
| 274 | ;; or if the desired indentation has already been computed. |
| 275 | (cond ((car (nthcdr 3 state)) |
| 276 | ;; Inside a string, don't change indentation. |
| 277 | (goto-char indent-point) |
| 278 | (skip-chars-forward " \t") |
| 279 | (setq desired-indent (current-column))) |
| 280 | ((and (integerp scheme-indent-offset) containing-sexp) |
| 281 | ;; Indent by constant offset |
| 282 | (goto-char containing-sexp) |
| 283 | (setq desired-indent (+ scheme-indent-offset (current-column)))) |
| 284 | ((not (or desired-indent |
| 285 | (and (boundp 'scheme-indent-function) |
| 286 | scheme-indent-function |
| 287 | (not retry) |
| 288 | (setq desired-indent |
| 289 | (funcall scheme-indent-function |
| 290 | indent-point state))))) |
| 291 | ;; Use default indentation if not computed yet |
| 292 | (setq desired-indent (current-column)))) |
| 293 | desired-indent))) |
| 294 | \f |
| 295 | (defun scheme-indent-function (indent-point state) |
| 296 | (let ((normal-indent (current-column))) |
| 297 | (save-excursion |
| 298 | (goto-char (1+ (car (cdr state)))) |
| 299 | (re-search-forward "\\sw\\|\\s_") |
| 300 | (if (/= (point) (car (cdr state))) |
| 301 | (let ((function (buffer-substring (progn (forward-char -1) (point)) |
| 302 | (progn (forward-sexp 1) (point)))) |
| 303 | method) |
| 304 | ;; Who cares about this, really? |
| 305 | ;(if (not (string-match "\\\\\\||" function))) |
| 306 | (setq function (downcase function)) |
| 307 | (setq method (get (intern-soft function) 'scheme-indent-function)) |
| 308 | (cond ((integerp method) |
| 309 | (scheme-indent-specform method state indent-point)) |
| 310 | (method |
| 311 | (funcall method state indent-point)) |
| 312 | ((and (> (length function) 3) |
| 313 | (string-equal (substring function 0 3) "def")) |
| 314 | (scheme-indent-defform state indent-point)))))))) |
| 315 | |
| 316 | (defvar scheme-body-indent 2 "") |
| 317 | \f |
| 318 | (defun scheme-indent-specform (count state indent-point) |
| 319 | (let ((containing-form-start (car (cdr state))) (i count) |
| 320 | body-indent containing-form-column) |
| 321 | ;; Move to the start of containing form, calculate indentation |
| 322 | ;; to use for non-distinguished forms (> count), and move past the |
| 323 | ;; function symbol. scheme-indent-function guarantees that there is at |
| 324 | ;; least one word or symbol character following open paren of containing |
| 325 | ;; form. |
| 326 | (goto-char containing-form-start) |
| 327 | (setq containing-form-column (current-column)) |
| 328 | (setq body-indent (+ scheme-body-indent containing-form-column)) |
| 329 | (forward-char 1) |
| 330 | (forward-sexp 1) |
| 331 | ;; Now find the start of the last form. |
| 332 | (parse-partial-sexp (point) indent-point 1 t) |
| 333 | (while (and (< (point) indent-point) |
| 334 | (condition-case nil |
| 335 | (progn |
| 336 | (setq count (1- count)) |
| 337 | (forward-sexp 1) |
| 338 | (parse-partial-sexp (point) indent-point 1 t)) |
| 339 | (error nil)))) |
| 340 | ;; Point is sitting on first character of last (or count) sexp. |
| 341 | (cond ((> count 0) |
| 342 | ;; A distinguished form. Use double scheme-body-indent. |
| 343 | (list (+ containing-form-column (* 2 scheme-body-indent)) |
| 344 | containing-form-start)) |
| 345 | ;; A non-distinguished form. Use body-indent if there are no |
| 346 | ;; distinguished forms and this is the first undistinguished |
| 347 | ;; form, or if this is the first undistinguished form and |
| 348 | ;; the preceding distinguished form has indentation at least |
| 349 | ;; as great as body-indent. |
| 350 | ((and (= count 0) |
| 351 | (or (= i 0) |
| 352 | (<= body-indent normal-indent))) |
| 353 | body-indent) |
| 354 | (t |
| 355 | normal-indent)))) |
| 356 | |
| 357 | (defun scheme-indent-defform (state indent-point) |
| 358 | (goto-char (car (cdr state))) |
| 359 | (forward-line 1) |
| 360 | (if (> (point) (car (cdr (cdr state)))) |
| 361 | (progn |
| 362 | (goto-char (car (cdr state))) |
| 363 | (+ scheme-body-indent (current-column))))) |
| 364 | \f |
| 365 | ;;; Let is different in Scheme |
| 366 | |
| 367 | (defun would-be-symbol (string) |
| 368 | (not (string-equal (substring string 0 1) "("))) |
| 369 | |
| 370 | (defun next-sexp-as-string () |
| 371 | ;; Assumes that protected by a save-excursion |
| 372 | (forward-sexp 1) |
| 373 | (let ((the-end (point))) |
| 374 | (backward-sexp 1) |
| 375 | (buffer-substring (point) the-end))) |
| 376 | |
| 377 | ;; This is correct but too slow. |
| 378 | ;; The one below works almost always. |
| 379 | ;;(defun scheme-let-indent (state indent-point) |
| 380 | ;; (if (would-be-symbol (next-sexp-as-string)) |
| 381 | ;; (scheme-indent-specform 2 state indent-point) |
| 382 | ;; (scheme-indent-specform 1 state indent-point))) |
| 383 | |
| 384 | (defun scheme-let-indent (state indent-point) |
| 385 | (skip-chars-forward " \t") |
| 386 | (if (looking-at "[a-zA-Z0-9+-*/?!@$%^&_:~]") |
| 387 | (scheme-indent-specform 2 state indent-point) |
| 388 | (scheme-indent-specform 1 state indent-point))) |
| 389 | |
| 390 | ;; (put 'begin 'scheme-indent-function 0), say, causes begin to be indented |
| 391 | ;; like defun if the first form is placed on the next line, otherwise |
| 392 | ;; it is indented like any other form (i.e. forms line up under first). |
| 393 | |
| 394 | (put 'begin 'scheme-indent-function 0) |
| 395 | (put 'case 'scheme-indent-function 1) |
| 396 | (put 'delay 'scheme-indent-function 0) |
| 397 | (put 'do 'scheme-indent-function 2) |
| 398 | (put 'lambda 'scheme-indent-function 1) |
| 399 | (put 'let 'scheme-indent-function 'scheme-let-indent) |
| 400 | (put 'let* 'scheme-indent-function 1) |
| 401 | (put 'letrec 'scheme-indent-function 1) |
| 402 | (put 'sequence 'scheme-indent-function 0) |
| 403 | |
| 404 | (put 'call-with-input-file 'scheme-indent-function 1) |
| 405 | (put 'with-input-from-file 'scheme-indent-function 1) |
| 406 | (put 'with-input-from-port 'scheme-indent-function 1) |
| 407 | (put 'call-with-output-file 'scheme-indent-function 1) |
| 408 | (put 'with-output-to-file 'scheme-indent-function 1) |
| 409 | (put 'with-output-to-port 'scheme-indent-function 1) |
| 410 | \f |
| 411 | ;;;; MIT Scheme specific indentation. |
| 412 | |
| 413 | (if scheme-mit-dialect |
| 414 | (progn |
| 415 | (put 'fluid-let 'scheme-indent-function 1) |
| 416 | (put 'in-package 'scheme-indent-function 1) |
| 417 | (put 'let-syntax 'scheme-indent-function 1) |
| 418 | (put 'local-declare 'scheme-indent-function 1) |
| 419 | (put 'macro 'scheme-indent-function 1) |
| 420 | (put 'make-environment 'scheme-indent-function 0) |
| 421 | (put 'named-lambda 'scheme-indent-function 1) |
| 422 | (put 'using-syntax 'scheme-indent-function 1) |
| 423 | |
| 424 | (put 'with-input-from-string 'scheme-indent-function 1) |
| 425 | (put 'with-output-to-string 'scheme-indent-function 0) |
| 426 | (put 'with-values 'scheme-indent-function 1) |
| 427 | |
| 428 | (put 'syntax-table-define 'scheme-indent-function 2) |
| 429 | (put 'list-transform-positive 'scheme-indent-function 1) |
| 430 | (put 'list-transform-negative 'scheme-indent-function 1) |
| 431 | (put 'list-search-positive 'scheme-indent-function 1) |
| 432 | (put 'list-search-negative 'scheme-indent-function 1) |
| 433 | |
| 434 | (put 'access-components 'scheme-indent-function 1) |
| 435 | (put 'assignment-components 'scheme-indent-function 1) |
| 436 | (put 'combination-components 'scheme-indent-function 1) |
| 437 | (put 'comment-components 'scheme-indent-function 1) |
| 438 | (put 'conditional-components 'scheme-indent-function 1) |
| 439 | (put 'disjunction-components 'scheme-indent-function 1) |
| 440 | (put 'declaration-components 'scheme-indent-function 1) |
| 441 | (put 'definition-components 'scheme-indent-function 1) |
| 442 | (put 'delay-components 'scheme-indent-function 1) |
| 443 | (put 'in-package-components 'scheme-indent-function 1) |
| 444 | (put 'lambda-components 'scheme-indent-function 1) |
| 445 | (put 'lambda-components* 'scheme-indent-function 1) |
| 446 | (put 'lambda-components** 'scheme-indent-function 1) |
| 447 | (put 'open-block-components 'scheme-indent-function 1) |
| 448 | (put 'pathname-components 'scheme-indent-function 1) |
| 449 | (put 'procedure-components 'scheme-indent-function 1) |
| 450 | (put 'sequence-components 'scheme-indent-function 1) |
| 451 | (put 'unassigned\?-components 'scheme-indent-function 1) |
| 452 | (put 'unbound\?-components 'scheme-indent-function 1) |
| 453 | (put 'variable-components 'scheme-indent-function 1))) |
| 454 | \f |
| 455 | (defun scheme-indent-sexp () |
| 456 | "Indent each line of the list starting just after point." |
| 457 | (interactive) |
| 458 | (let ((indent-stack (list nil)) (next-depth 0) bol |
| 459 | outer-loop-done inner-loop-done state this-indent) |
| 460 | (save-excursion (forward-sexp 1)) |
| 461 | (save-excursion |
| 462 | (setq outer-loop-done nil) |
| 463 | (while (not outer-loop-done) |
| 464 | (setq last-depth next-depth |
| 465 | innerloop-done nil) |
| 466 | (while (and (not innerloop-done) |
| 467 | (not (setq outer-loop-done (eobp)))) |
| 468 | (setq state (parse-partial-sexp (point) (progn (end-of-line) (point)) |
| 469 | nil nil state)) |
| 470 | (setq next-depth (car state)) |
| 471 | (if (car (nthcdr 4 state)) |
| 472 | (progn (indent-for-comment) |
| 473 | (end-of-line) |
| 474 | (setcar (nthcdr 4 state) nil))) |
| 475 | (if (car (nthcdr 3 state)) |
| 476 | (progn |
| 477 | (forward-line 1) |
| 478 | (setcar (nthcdr 5 state) nil)) |
| 479 | (setq innerloop-done t))) |
| 480 | (if (setq outer-loop-done (<= next-depth 0)) |
| 481 | nil |
| 482 | (while (> last-depth next-depth) |
| 483 | (setq indent-stack (cdr indent-stack) |
| 484 | last-depth (1- last-depth))) |
| 485 | (while (< last-depth next-depth) |
| 486 | (setq indent-stack (cons nil indent-stack) |
| 487 | last-depth (1+ last-depth))) |
| 488 | (forward-line 1) |
| 489 | (setq bol (point)) |
| 490 | (skip-chars-forward " \t") |
| 491 | (if (or (eobp) (looking-at "[;\n]")) |
| 492 | nil |
| 493 | (if (and (car indent-stack) |
| 494 | (>= (car indent-stack) 0)) |
| 495 | (setq this-indent (car indent-stack)) |
| 496 | (let ((val (calculate-scheme-indent |
| 497 | (if (car indent-stack) (- (car indent-stack)))))) |
| 498 | (if (integerp val) |
| 499 | (setcar indent-stack |
| 500 | (setq this-indent val)) |
| 501 | (setcar indent-stack (- (car (cdr val)))) |
| 502 | (setq this-indent (car val))))) |
| 503 | (if (/= (current-column) this-indent) |
| 504 | (progn (delete-region bol (point)) |
| 505 | (indent-to this-indent))))))))) |
| 506 | |
| 507 | (provide 'scheme) |
| 508 | |
| 509 | ;;; scheme.el ends here |