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e8af40ee | 1 | ;;; scheme.el --- Scheme (and DSSSL) editing mode |
c88ab9ce | 2 | |
acaf905b | 3 | ;; Copyright (C) 1986-1988, 1997-1998, 2001-2012 |
95df8112 | 4 | ;; Free Software Foundation, Inc. |
3a801d0c | 5 | |
4228277d | 6 | ;; Author: Bill Rozas <jinx@martigny.ai.mit.edu> |
d575e99d | 7 | ;; Adapted-by: Dave Love <d.love@dl.ac.uk> |
d7b4d18f | 8 | ;; Keywords: languages, lisp |
e5167999 | 9 | |
ac5b21ac RS |
10 | ;; This file is part of GNU Emacs. |
11 | ||
b1fc2b50 | 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
ac5b21ac | 13 | ;; it under the terms of the GNU General Public License as published by |
b1fc2b50 GM |
14 | ;; the Free Software Foundation, either version 3 of the License, or |
15 | ;; (at your option) any later version. | |
ac5b21ac RS |
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 | |
b1fc2b50 | 23 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
ac5b21ac | 24 | |
e5167999 | 25 | ;;; Commentary: |
ac5b21ac | 26 | |
1367ff3a RS |
27 | ;; The major mode for editing Scheme-type Lisp code, very similar to |
28 | ;; the Lisp mode documented in the Emacs manual. `dsssl-mode' is a | |
29 | ;; variant of scheme-mode for editing DSSSL specifications for SGML | |
30 | ;; documents. [As of Apr 1997, some pointers for DSSSL may be found, | |
31 | ;; for instance, at <URL:http://www.sil.org/sgml/related.html#dsssl>.] | |
32 | ;; All these Lisp-ish modes vary basically in details of the language | |
33 | ;; syntax they highlight/indent/index, but dsssl-mode uses "^;;;" as | |
64ef5f39 | 34 | ;; the page-delimiter since ^L isn't normally a valid SGML character. |
1367ff3a RS |
35 | ;; |
36 | ;; For interacting with a Scheme interpreter See also `run-scheme' in | |
37 | ;; the `cmuscheme' package and also the implementation-specific | |
38 | ;; `xscheme' package. | |
ac5b21ac | 39 | |
2b20743d DL |
40 | ;; Here's a recipe to generate a TAGS file for DSSSL, by the way: |
41 | ;; etags --lang=scheme --regex='/[ \t]*(\(mode\|element\)[ \t | |
42 | ;; ]+\([^ \t( | |
43 | ;; ]+\)/\2/' --regex='/[ \t]*(element[ \t | |
44 | ;; ]*([^)]+[ \t | |
45 | ;; ]+\([^)]+\)[ \t | |
46 | ;; ]*)/\1/' --regex='/(declare[^ \t | |
47 | ;; ]*[ \t | |
48 | ;; ]+\([^ \t | |
49 | ;; ]+\)/\1/' "$@" | |
50 | ||
e5167999 | 51 | ;;; Code: |
ac5b21ac | 52 | \f |
1367ff3a RS |
53 | (require 'lisp-mode) |
54 | ||
9fce950d SM |
55 | (defvar scheme-mode-syntax-table |
56 | (let ((st (make-syntax-table)) | |
57 | (i 0)) | |
f13f86fb CY |
58 | ;; Symbol constituents |
59 | ;; We used to treat chars 128-256 as symbol-constituent, but they | |
60 | ;; should be valid word constituents (Bug#8843). Note that valid | |
61 | ;; identifier characters are Scheme-implementation dependent. | |
62 | (while (< i ?0) | |
c676c4e5 TTN |
63 | (modify-syntax-entry i "_ " st) |
64 | (setq i (1+ i))) | |
f13f86fb CY |
65 | (setq i (1+ ?9)) |
66 | (while (< i ?A) | |
67 | (modify-syntax-entry i "_ " st) | |
c676c4e5 | 68 | (setq i (1+ i))) |
f13f86fb CY |
69 | (setq i (1+ ?Z)) |
70 | (while (< i ?a) | |
71 | (modify-syntax-entry i "_ " st) | |
c676c4e5 | 72 | (setq i (1+ i))) |
f13f86fb CY |
73 | (setq i (1+ ?z)) |
74 | (while (< i 128) | |
75 | (modify-syntax-entry i "_ " st) | |
c676c4e5 TTN |
76 | (setq i (1+ i))) |
77 | ||
78 | ;; Whitespace | |
79 | (modify-syntax-entry ?\t " " st) | |
80 | (modify-syntax-entry ?\n "> " st) | |
81 | (modify-syntax-entry ?\f " " st) | |
82 | (modify-syntax-entry ?\r " " st) | |
347a0b69 | 83 | (modify-syntax-entry ?\s " " st) |
c676c4e5 TTN |
84 | |
85 | ;; These characters are delimiters but otherwise undefined. | |
86 | ;; Brackets and braces balance for editing convenience. | |
87 | (modify-syntax-entry ?\[ "(] " st) | |
88 | (modify-syntax-entry ?\] ")[ " st) | |
89 | (modify-syntax-entry ?{ "(} " st) | |
90 | (modify-syntax-entry ?} "){ " st) | |
f17ae68f SM |
91 | (modify-syntax-entry ?\| "\" 23bn" st) |
92 | ;; Guile allows #! ... !# comments. | |
93 | ;; But SRFI-22 defines the comment as #!...\n instead. | |
94 | ;; Also Guile says that the !# should be on a line of its own. | |
95 | ;; It's too difficult to get it right, for too little benefit. | |
96 | ;; (modify-syntax-entry ?! "_ 2" st) | |
c676c4e5 TTN |
97 | |
98 | ;; Other atom delimiters | |
99 | (modify-syntax-entry ?\( "() " st) | |
100 | (modify-syntax-entry ?\) ")( " st) | |
21c3ef84 SM |
101 | ;; It's used for single-line comments as well as for #;(...) sexp-comments. |
102 | (modify-syntax-entry ?\; "< 2 " st) | |
103 | (modify-syntax-entry ?\" "\" " st) | |
0a08535e RS |
104 | (modify-syntax-entry ?' "' " st) |
105 | (modify-syntax-entry ?` "' " st) | |
c676c4e5 TTN |
106 | |
107 | ;; Special characters | |
0a08535e RS |
108 | (modify-syntax-entry ?, "' " st) |
109 | (modify-syntax-entry ?@ "' " st) | |
c5683ceb | 110 | (modify-syntax-entry ?# "' 14" st) |
c676c4e5 | 111 | (modify-syntax-entry ?\\ "\\ " st) |
9fce950d | 112 | st)) |
ac5b21ac | 113 | \f |
d17f0db5 | 114 | (defvar scheme-mode-abbrev-table nil) |
ac5b21ac RS |
115 | (define-abbrev-table 'scheme-mode-abbrev-table ()) |
116 | ||
1367ff3a | 117 | (defvar scheme-imenu-generic-expression |
d17f0db5 | 118 | '((nil |
d575e99d | 119 | "^(define\\(\\|-\\(generic\\(\\|-procedure\\)\\|method\\)\\)*\\s-+(?\\(\\sw+\\)" 4) |
d17f0db5 | 120 | ("Types" |
d575e99d | 121 | "^(define-class\\s-+(?\\(\\sw+\\)" 1) |
93a7d76f | 122 | ("Macros" |
d575e99d | 123 | "^(\\(defmacro\\|define-macro\\|define-syntax\\)\\s-+(?\\(\\sw+\\)" 2)) |
1367ff3a RS |
124 | "Imenu generic expression for Scheme mode. See `imenu-generic-expression'.") |
125 | ||
ac5b21ac RS |
126 | (defun scheme-mode-variables () |
127 | (set-syntax-table scheme-mode-syntax-table) | |
128 | (setq local-abbrev-table scheme-mode-abbrev-table) | |
175069ef SM |
129 | (set (make-local-variable 'paragraph-start) (concat "$\\|" page-delimiter)) |
130 | (set (make-local-variable 'paragraph-separate) paragraph-start) | |
131 | (set (make-local-variable 'paragraph-ignore-fill-prefix) t) | |
132 | (set (make-local-variable 'fill-paragraph-function) 'lisp-fill-paragraph) | |
1367ff3a RS |
133 | ;; Adaptive fill mode gets in the way of auto-fill, |
134 | ;; and should make no difference for explicit fill | |
135 | ;; because lisp-fill-paragraph should do the job. | |
175069ef SM |
136 | (set (make-local-variable 'adaptive-fill-mode) nil) |
137 | (set (make-local-variable 'indent-line-function) 'lisp-indent-line) | |
138 | (set (make-local-variable 'parse-sexp-ignore-comments) t) | |
139 | (set (make-local-variable 'outline-regexp) ";;; \\|(....") | |
140 | (set (make-local-variable 'comment-start) ";") | |
150bbae7 | 141 | (set (make-local-variable 'comment-add) 1) |
a24c42f7 MB |
142 | ;; Look within the line for a ; following an even number of backslashes |
143 | ;; after either a non-backslash or the line beginning. | |
175069ef SM |
144 | (set (make-local-variable 'comment-start-skip) |
145 | "\\(\\(^\\|[^\\\\\n]\\)\\(\\\\\\\\\\)*\\);+[ \t]*") | |
e8612bf2 | 146 | (set (make-local-variable 'font-lock-comment-start-skip) ";+ *") |
175069ef SM |
147 | (set (make-local-variable 'comment-column) 40) |
148 | (set (make-local-variable 'parse-sexp-ignore-comments) t) | |
149 | (set (make-local-variable 'lisp-indent-function) 'scheme-indent-function) | |
1367ff3a | 150 | (setq mode-line-process '("" scheme-mode-line-process)) |
1b9a1e9d | 151 | (set (make-local-variable 'imenu-case-fold-search) t) |
c0b08eb0 | 152 | (setq imenu-generic-expression scheme-imenu-generic-expression) |
1b9a1e9d DL |
153 | (set (make-local-variable 'imenu-syntax-alist) |
154 | '(("+-*/.<>=?!$%_&~^:" . "w"))) | |
21c3ef84 SM |
155 | (set (make-local-variable 'font-lock-defaults) |
156 | '((scheme-font-lock-keywords | |
157 | scheme-font-lock-keywords-1 scheme-font-lock-keywords-2) | |
158 | nil t (("+-*/.<>=!?$%_&~^:" . "w") (?#. "w 14")) | |
159 | beginning-of-defun | |
160 | (font-lock-mark-block-function . mark-defun) | |
161 | (font-lock-syntactic-face-function | |
162 | . scheme-font-lock-syntactic-face-function) | |
163 | (parse-sexp-lookup-properties . t) | |
164 | (font-lock-extra-managed-props syntax-table))) | |
165 | (set (make-local-variable 'lisp-doc-string-elt-property) | |
166 | 'scheme-doc-string-elt)) | |
ac5b21ac RS |
167 | |
168 | (defvar scheme-mode-line-process "") | |
169 | ||
150bbae7 SM |
170 | (defvar scheme-mode-map |
171 | (let ((smap (make-sparse-keymap)) | |
172 | (map (make-sparse-keymap "Scheme"))) | |
173 | (set-keymap-parent smap lisp-mode-shared-map) | |
174 | (define-key smap [menu-bar scheme] (cons "Scheme" map)) | |
ece8c34d DL |
175 | (define-key map [run-scheme] '("Run Inferior Scheme" . run-scheme)) |
176 | (define-key map [uncomment-region] | |
177 | '("Uncomment Out Region" . (lambda (beg end) | |
178 | (interactive "r") | |
179 | (comment-region beg end '(4))))) | |
180 | (define-key map [comment-region] '("Comment Out Region" . comment-region)) | |
181 | (define-key map [indent-region] '("Indent Region" . indent-region)) | |
182 | (define-key map [indent-line] '("Indent Line" . lisp-indent-line)) | |
183 | (put 'comment-region 'menu-enable 'mark-active) | |
184 | (put 'uncomment-region 'menu-enable 'mark-active) | |
150bbae7 SM |
185 | (put 'indent-region 'menu-enable 'mark-active) |
186 | smap) | |
187 | "Keymap for Scheme mode. | |
188 | All commands in `lisp-mode-shared-map' are inherited by this map.") | |
1367ff3a RS |
189 | |
190 | ;; Used by cmuscheme | |
ac5b21ac | 191 | (defun scheme-mode-commands (map) |
48879301 | 192 | ;;(define-key map "\t" 'indent-for-tab-command) ; default |
ac5b21ac | 193 | (define-key map "\177" 'backward-delete-char-untabify) |
48879301 | 194 | (define-key map "\e\C-q" 'indent-sexp)) |
ac5b21ac | 195 | \f |
e2ab0aa6 | 196 | ;;;###autoload |
175069ef | 197 | (define-derived-mode scheme-mode prog-mode "Scheme" |
ac5b21ac | 198 | "Major mode for editing Scheme code. |
d17f0db5 | 199 | Editing commands are similar to those of `lisp-mode'. |
ac5b21ac RS |
200 | |
201 | In addition, if an inferior Scheme process is running, some additional | |
202 | commands will be defined, for evaluating expressions and controlling | |
203 | the interpreter, and the state of the process will be displayed in the | |
37269466 | 204 | mode line of all Scheme buffers. The names of commands that interact |
1b9a1e9d DL |
205 | with the Scheme process start with \"xscheme-\" if you use the MIT |
206 | Scheme-specific `xscheme' package; for more information see the | |
207 | documentation for `xscheme-interaction-mode'. Use \\[run-scheme] to | |
208 | start an inferior Scheme using the more general `cmuscheme' package. | |
ac5b21ac RS |
209 | |
210 | Commands: | |
211 | Delete converts tabs to spaces as it moves back. | |
212 | Blank lines separate paragraphs. Semicolons start comments. | |
213 | \\{scheme-mode-map} | |
d17f0db5 | 214 | Entry to this mode calls the value of `scheme-mode-hook' |
ac5b21ac | 215 | if that value is non-nil." |
175069ef | 216 | (scheme-mode-variables)) |
ac5b21ac | 217 | |
48879301 | 218 | (defgroup scheme nil |
347a0b69 | 219 | "Editing Scheme code." |
8ec3bce0 | 220 | :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces) |
48879301 RS |
221 | :group 'lisp) |
222 | ||
223 | (defcustom scheme-mit-dialect t | |
ac5b21ac | 224 | "If non-nil, scheme mode is specialized for MIT Scheme. |
48879301 RS |
225 | Set this to nil if you normally use another dialect." |
226 | :type 'boolean | |
227 | :group 'scheme) | |
1367ff3a | 228 | |
48879301 | 229 | (defcustom dsssl-sgml-declaration |
1367ff3a RS |
230 | "<!DOCTYPE style-sheet PUBLIC \"-//James Clark//DTD DSSSL Style Sheet//EN\"> |
231 | " | |
fb7ada5f | 232 | "An SGML declaration for the DSSSL file. |
2b20743d | 233 | If it is defined as a string this will be inserted into an empty buffer |
d17f0db5 | 234 | which is in `dsssl-mode'. It is typically James Clark's style-sheet |
48879301 | 235 | doctype, as required for Jade." |
d17f0db5 | 236 | :type '(choice (string :tag "Specified string") |
2b20743d DL |
237 | (const :tag "None" :value nil)) |
238 | :group 'scheme) | |
239 | ||
240 | (defcustom scheme-mode-hook nil | |
d17f0db5 | 241 | "Normal hook run when entering `scheme-mode'. |
2b20743d DL |
242 | See `run-hooks'." |
243 | :type 'hook | |
244 | :group 'scheme) | |
245 | ||
246 | (defcustom dsssl-mode-hook nil | |
d17f0db5 | 247 | "Normal hook run when entering `dsssl-mode'. |
2b20743d DL |
248 | See `run-hooks'." |
249 | :type 'hook | |
48879301 | 250 | :group 'scheme) |
1367ff3a | 251 | |
f7a6110d DL |
252 | ;; This is shared by cmuscheme and xscheme. |
253 | (defcustom scheme-program-name "scheme" | |
fb7ada5f | 254 | "Program invoked by the `run-scheme' command." |
f7a6110d DL |
255 | :type 'string |
256 | :group 'scheme) | |
257 | ||
1367ff3a RS |
258 | (defvar dsssl-imenu-generic-expression |
259 | ;; Perhaps this should also look for the style-sheet DTD tags. I'm | |
260 | ;; not sure it's the best way to organize it; perhaps one type | |
261 | ;; should be at the first level, though you don't see this anyhow if | |
262 | ;; it gets split up. | |
d17f0db5 | 263 | '(("Defines" |
d575e99d | 264 | "^(define\\s-+(?\\(\\sw+\\)" 1) |
93a7d76f | 265 | ("Modes" |
d575e99d | 266 | "^\\s-*(mode\\s-+\\(\\(\\sw\\|\\s-\\)+\\)" 1) |
93a7d76f | 267 | ("Elements" |
1367ff3a | 268 | ;; (element foo ...) or (element (foo bar ...) ...) |
26d05e22 | 269 | ;; Fixme: Perhaps it should do `root'. |
d575e99d | 270 | "^\\s-*(element\\s-+(?\\(\\(\\sw\\|\\s-\\)+\\))?" 1) |
d17f0db5 | 271 | ("Declarations" |
d575e99d | 272 | "^(declare\\(-\\sw+\\)+\\>\\s-+\\(\\sw+\\)" 2)) |
1367ff3a RS |
273 | "Imenu generic expression for DSSSL mode. See `imenu-generic-expression'.") |
274 | ||
22dcd0d1 DL |
275 | (defconst scheme-font-lock-keywords-1 |
276 | (eval-when-compile | |
277 | (list | |
278 | ;; | |
279 | ;; Declarations. Hannes Haug <hannes.haug@student.uni-tuebingen.de> says | |
280 | ;; this works for SOS, STklos, SCOOPS, Meroon and Tiny CLOS. | |
405ff5ea | 281 | (list (concat "(\\(define\\*?\\(" |
22dcd0d1 | 282 | ;; Function names. |
405ff5ea | 283 | "\\(\\|-public\\|-method\\|-generic\\(-procedure\\)?\\)\\|" |
22dcd0d1 | 284 | ;; Macro names, as variable names. A bit dubious, this. |
1b9a1e9d | 285 | "\\(-syntax\\|-macro\\)\\|" |
22dcd0d1 DL |
286 | ;; Class names. |
287 | "-class" | |
405ff5ea RS |
288 | ;; Guile modules. |
289 | "\\|-module" | |
22dcd0d1 DL |
290 | "\\)\\)\\>" |
291 | ;; Any whitespace and declared object. | |
292 | "[ \t]*(?" | |
293 | "\\(\\sw+\\)?") | |
294 | '(1 font-lock-keyword-face) | |
295 | '(6 (cond ((match-beginning 3) font-lock-function-name-face) | |
296 | ((match-beginning 5) font-lock-variable-name-face) | |
297 | (t font-lock-type-face)) | |
298 | nil t)) | |
299 | )) | |
300 | "Subdued expressions to highlight in Scheme modes.") | |
301 | ||
302 | (defconst scheme-font-lock-keywords-2 | |
303 | (append scheme-font-lock-keywords-1 | |
304 | (eval-when-compile | |
305 | (list | |
306 | ;; | |
307 | ;; Control structures. | |
308 | (cons | |
309 | (concat | |
310 | "(" (regexp-opt | |
311 | '("begin" "call-with-current-continuation" "call/cc" | |
312 | "call-with-input-file" "call-with-output-file" "case" "cond" | |
313 | "do" "else" "for-each" "if" "lambda" | |
314 | "let" "let*" "let-syntax" "letrec" "letrec-syntax" | |
12cf1a12 TTN |
315 | ;; SRFI 11 usage comes up often enough. |
316 | "let-values" "let*-values" | |
22dcd0d1 | 317 | ;; Hannes Haug <hannes.haug@student.uni-tuebingen.de> wants: |
c1bfdd54 | 318 | "and" "or" "delay" "force" |
22dcd0d1 DL |
319 | ;; Stefan Monnier <stefan.monnier@epfl.ch> says don't bother: |
320 | ;;"quasiquote" "quote" "unquote" "unquote-splicing" | |
321 | "map" "syntax" "syntax-rules") t) | |
322 | "\\>") 1) | |
323 | ;; | |
22071507 TTN |
324 | ;; It wouldn't be Scheme w/o named-let. |
325 | '("(let\\s-+\\(\\sw+\\)" | |
326 | (1 font-lock-function-name-face)) | |
327 | ;; | |
22dcd0d1 DL |
328 | ;; David Fox <fox@graphics.cs.nyu.edu> for SOS/STklos class specifiers. |
329 | '("\\<<\\sw+>\\>" . font-lock-type-face) | |
330 | ;; | |
cb049c41 TTN |
331 | ;; Scheme `:' and `#:' keywords as builtins. |
332 | '("\\<#?:\\sw+\\>" . font-lock-builtin-face) | |
22dcd0d1 DL |
333 | ))) |
334 | "Gaudy expressions to highlight in Scheme modes.") | |
335 | ||
336 | (defvar scheme-font-lock-keywords scheme-font-lock-keywords-1 | |
337 | "Default expressions to highlight in Scheme modes.") | |
338 | ||
21c3ef84 SM |
339 | (defconst scheme-sexp-comment-syntax-table |
340 | (let ((st (make-syntax-table scheme-mode-syntax-table))) | |
341 | (modify-syntax-entry ?\; "." st) | |
342 | (modify-syntax-entry ?\n " " st) | |
343 | (modify-syntax-entry ?# "'" st) | |
344 | st)) | |
345 | ||
346 | (put 'lambda 'scheme-doc-string-elt 2) | |
347 | ;; Docstring's pos in a `define' depends on whether it's a var or fun def. | |
348 | (put 'define 'scheme-doc-string-elt | |
349 | (lambda () | |
350 | ;; The function is called with point right after "define". | |
351 | (forward-comment (point-max)) | |
352 | (if (eq (char-after) ?\() 2 0))) | |
353 | ||
f17ae68f | 354 | (defun scheme-font-lock-syntactic-face-function (state) |
21c3ef84 SM |
355 | (when (and (null (nth 3 state)) |
356 | (eq (char-after (nth 8 state)) ?#) | |
357 | (eq (char-after (1+ (nth 8 state))) ?\;)) | |
358 | ;; It's a sexp-comment. Tell parse-partial-sexp where it ends. | |
359 | (save-excursion | |
360 | (let ((pos (point)) | |
361 | (end | |
362 | (condition-case err | |
363 | (let ((parse-sexp-lookup-properties nil)) | |
364 | (goto-char (+ 2 (nth 8 state))) | |
365 | ;; FIXME: this doesn't handle the case where the sexp | |
366 | ;; itself contains a #; comment. | |
367 | (forward-sexp 1) | |
368 | (point)) | |
369 | (scan-error (nth 2 err))))) | |
370 | (when (< pos (- end 2)) | |
371 | (put-text-property pos (- end 2) | |
372 | 'syntax-table scheme-sexp-comment-syntax-table)) | |
373 | (put-text-property (- end 1) end 'syntax-table '(12))))) | |
374 | ;; Choose the face to use. | |
375 | (lisp-font-lock-syntactic-face-function state)) | |
f17ae68f | 376 | |
1367ff3a | 377 | ;;;###autoload |
150bbae7 | 378 | (define-derived-mode dsssl-mode scheme-mode "DSSSL" |
1367ff3a | 379 | "Major mode for editing DSSSL code. |
d17f0db5 | 380 | Editing commands are similar to those of `lisp-mode'. |
1367ff3a RS |
381 | |
382 | Commands: | |
383 | Delete converts tabs to spaces as it moves back. | |
384 | Blank lines separate paragraphs. Semicolons start comments. | |
385 | \\{scheme-mode-map} | |
22dcd0d1 DL |
386 | Entering this mode runs the hooks `scheme-mode-hook' and then |
387 | `dsssl-mode-hook' and inserts the value of `dsssl-sgml-declaration' if | |
388 | that variable's value is a string." | |
175069ef | 389 | (set (make-local-variable 'page-delimiter) "^;;;") ; ^L not valid SGML char |
1367ff3a | 390 | ;; Insert a suitable SGML declaration into an empty buffer. |
150bbae7 | 391 | ;; FIXME: This should use `auto-insert-alist' instead. |
1367ff3a | 392 | (and (zerop (buffer-size)) |
26d05e22 | 393 | (stringp dsssl-sgml-declaration) |
1367ff3a RS |
394 | (not buffer-read-only) |
395 | (insert dsssl-sgml-declaration)) | |
22dcd0d1 DL |
396 | (setq font-lock-defaults '(dsssl-font-lock-keywords |
397 | nil t (("+-*/.<>=?$%_&~^:" . "w")) | |
398 | beginning-of-defun | |
399 | (font-lock-mark-block-function . mark-defun))) | |
1b9a1e9d | 400 | (set (make-local-variable 'imenu-case-fold-search) nil) |
c0b08eb0 | 401 | (setq imenu-generic-expression dsssl-imenu-generic-expression) |
1b9a1e9d | 402 | (set (make-local-variable 'imenu-syntax-alist) |
150bbae7 | 403 | '(("+-*/.<>=?$%_&~^:" . "w")))) |
1367ff3a RS |
404 | |
405 | ;; Extra syntax for DSSSL. This isn't separated from Scheme, but | |
406 | ;; shouldn't cause much trouble in scheme-mode. | |
407 | (put 'element 'scheme-indent-function 1) | |
408 | (put 'mode 'scheme-indent-function 1) | |
409 | (put 'with-mode 'scheme-indent-function 1) | |
2f5029f3 | 410 | (put 'make 'scheme-indent-function 1) |
26d05e22 RS |
411 | (put 'style 'scheme-indent-function 1) |
412 | (put 'root 'scheme-indent-function 1) | |
1367ff3a RS |
413 | |
414 | (defvar dsssl-font-lock-keywords | |
26d05e22 RS |
415 | (eval-when-compile |
416 | (list | |
417 | ;; Similar to Scheme | |
418 | (list "(\\(define\\(-\\w+\\)?\\)\\>[ ]*\\\((?\\)\\(\\sw+\\)\\>" | |
419 | '(1 font-lock-keyword-face) | |
420 | '(4 font-lock-function-name-face)) | |
421 | (cons | |
422 | (concat "(\\(" | |
423 | ;; (make-regexp '("case" "cond" "else" "if" "lambda" | |
424 | ;; "let" "let*" "letrec" "and" "or" "map" "with-mode")) | |
425 | "and\\|c\\(ase\\|ond\\)\\|else\\|if\\|" | |
426 | "l\\(ambda\\|et\\(\\|*\\|rec\\)\\)\\|map\\|or\\|with-mode" | |
427 | "\\)\\>") | |
428 | 1) | |
429 | ;; DSSSL syntax | |
430 | '("(\\(element\\|mode\\|declare-\\w+\\)\\>[ ]*\\(\\sw+\\)" | |
431 | (1 font-lock-keyword-face) | |
432 | (2 font-lock-type-face)) | |
433 | '("(\\(element\\)\\>[ ]*(\\(\\S)+\\))" | |
434 | (1 font-lock-keyword-face) | |
435 | (2 font-lock-type-face)) | |
883212ce | 436 | '("\\<\\sw+:\\>" . font-lock-constant-face) ; trailing `:' c.f. scheme |
26d05e22 RS |
437 | ;; SGML markup (from sgml-mode) : |
438 | '("<\\([!?][-a-z0-9]+\\)" 1 font-lock-keyword-face) | |
439 | '("<\\(/?[-a-z0-9]+\\)" 1 font-lock-function-name-face))) | |
1367ff3a RS |
440 | "Default expressions to highlight in DSSSL mode.") |
441 | ||
ac5b21ac | 442 | \f |
1367ff3a RS |
443 | (defvar calculate-lisp-indent-last-sexp) |
444 | ||
b7556719 GM |
445 | |
446 | ;; FIXME this duplicates almost all of lisp-indent-function. | |
447 | ;; Extract common code to a subroutine. | |
ac5b21ac | 448 | (defun scheme-indent-function (indent-point state) |
b7556719 GM |
449 | "Scheme mode function for the value of the variable `lisp-indent-function'. |
450 | This behaves like the function `lisp-indent-function', except that: | |
451 | ||
452 | i) it checks for a non-nil value of the property `scheme-indent-function' | |
dd4b63a6 | 453 | \(or the deprecated `scheme-indent-hook'), rather than `lisp-indent-function'. |
b7556719 | 454 | |
b026d240 | 455 | ii) if that property specifies a function, it is called with three |
b7556719 GM |
456 | arguments (not two), the third argument being the default (i.e., current) |
457 | indentation." | |
ac5b21ac | 458 | (let ((normal-indent (current-column))) |
1367ff3a RS |
459 | (goto-char (1+ (elt state 1))) |
460 | (parse-partial-sexp (point) calculate-lisp-indent-last-sexp 0 t) | |
461 | (if (and (elt state 2) | |
462 | (not (looking-at "\\sw\\|\\s_"))) | |
4696802b | 463 | ;; car of form doesn't seem to be a symbol |
1367ff3a RS |
464 | (progn |
465 | (if (not (> (save-excursion (forward-line 1) (point)) | |
466 | calculate-lisp-indent-last-sexp)) | |
467 | (progn (goto-char calculate-lisp-indent-last-sexp) | |
468 | (beginning-of-line) | |
469 | (parse-partial-sexp (point) | |
470 | calculate-lisp-indent-last-sexp 0 t))) | |
471 | ;; Indent under the list or under the first sexp on the same | |
472 | ;; line as calculate-lisp-indent-last-sexp. Note that first | |
473 | ;; thing on that line has to be complete sexp since we are | |
474 | ;; inside the innermost containing sexp. | |
475 | (backward-prefix-chars) | |
476 | (current-column)) | |
477 | (let ((function (buffer-substring (point) | |
478 | (progn (forward-sexp 1) (point)))) | |
479 | method) | |
480 | (setq method (or (get (intern-soft function) 'scheme-indent-function) | |
481 | (get (intern-soft function) 'scheme-indent-hook))) | |
482 | (cond ((or (eq method 'defun) | |
483 | (and (null method) | |
484 | (> (length function) 3) | |
485 | (string-match "\\`def" function))) | |
486 | (lisp-indent-defform state indent-point)) | |
487 | ((integerp method) | |
488 | (lisp-indent-specform method state | |
489 | indent-point normal-indent)) | |
490 | (method | |
61185f42 | 491 | (funcall method state indent-point normal-indent))))))) |
1367ff3a | 492 | |
ac5b21ac RS |
493 | \f |
494 | ;;; Let is different in Scheme | |
495 | ||
496 | (defun would-be-symbol (string) | |
497 | (not (string-equal (substring string 0 1) "("))) | |
498 | ||
499 | (defun next-sexp-as-string () | |
d17f0db5 | 500 | ;; Assumes that it is protected by a save-excursion |
ac5b21ac RS |
501 | (forward-sexp 1) |
502 | (let ((the-end (point))) | |
503 | (backward-sexp 1) | |
504 | (buffer-substring (point) the-end))) | |
505 | ||
506 | ;; This is correct but too slow. | |
507 | ;; The one below works almost always. | |
508 | ;;(defun scheme-let-indent (state indent-point) | |
509 | ;; (if (would-be-symbol (next-sexp-as-string)) | |
510 | ;; (scheme-indent-specform 2 state indent-point) | |
511 | ;; (scheme-indent-specform 1 state indent-point))) | |
512 | ||
61185f42 | 513 | (defun scheme-let-indent (state indent-point normal-indent) |
ac5b21ac | 514 | (skip-chars-forward " \t") |
61361a07 | 515 | (if (looking-at "[-a-zA-Z0-9+*/?!@$%^&_:~]") |
61185f42 KH |
516 | (lisp-indent-specform 2 state indent-point normal-indent) |
517 | (lisp-indent-specform 1 state indent-point normal-indent))) | |
ac5b21ac RS |
518 | |
519 | ;; (put 'begin 'scheme-indent-function 0), say, causes begin to be indented | |
520 | ;; like defun if the first form is placed on the next line, otherwise | |
521 | ;; it is indented like any other form (i.e. forms line up under first). | |
522 | ||
523 | (put 'begin 'scheme-indent-function 0) | |
524 | (put 'case 'scheme-indent-function 1) | |
525 | (put 'delay 'scheme-indent-function 0) | |
526 | (put 'do 'scheme-indent-function 2) | |
527 | (put 'lambda 'scheme-indent-function 1) | |
528 | (put 'let 'scheme-indent-function 'scheme-let-indent) | |
529 | (put 'let* 'scheme-indent-function 1) | |
530 | (put 'letrec 'scheme-indent-function 1) | |
12cf1a12 TTN |
531 | (put 'let-values 'scheme-indent-function 1) ; SRFI 11 |
532 | (put 'let*-values 'scheme-indent-function 1) ; SRFI 11 | |
2b20743d DL |
533 | (put 'sequence 'scheme-indent-function 0) ; SICP, not r4rs |
534 | (put 'let-syntax 'scheme-indent-function 1) | |
535 | (put 'letrec-syntax 'scheme-indent-function 1) | |
536 | (put 'syntax-rules 'scheme-indent-function 1) | |
0ec2c350 | 537 | (put 'syntax-case 'scheme-indent-function 2) ; not r5rs |
ac5b21ac RS |
538 | |
539 | (put 'call-with-input-file 'scheme-indent-function 1) | |
540 | (put 'with-input-from-file 'scheme-indent-function 1) | |
541 | (put 'with-input-from-port 'scheme-indent-function 1) | |
542 | (put 'call-with-output-file 'scheme-indent-function 1) | |
543 | (put 'with-output-to-file 'scheme-indent-function 1) | |
544 | (put 'with-output-to-port 'scheme-indent-function 1) | |
2b20743d DL |
545 | (put 'call-with-values 'scheme-indent-function 1) ; r5rs? |
546 | (put 'dynamic-wind 'scheme-indent-function 3) ; r5rs? | |
ac5b21ac RS |
547 | \f |
548 | ;;;; MIT Scheme specific indentation. | |
549 | ||
550 | (if scheme-mit-dialect | |
551 | (progn | |
552 | (put 'fluid-let 'scheme-indent-function 1) | |
553 | (put 'in-package 'scheme-indent-function 1) | |
ac5b21ac RS |
554 | (put 'local-declare 'scheme-indent-function 1) |
555 | (put 'macro 'scheme-indent-function 1) | |
556 | (put 'make-environment 'scheme-indent-function 0) | |
557 | (put 'named-lambda 'scheme-indent-function 1) | |
558 | (put 'using-syntax 'scheme-indent-function 1) | |
559 | ||
560 | (put 'with-input-from-string 'scheme-indent-function 1) | |
561 | (put 'with-output-to-string 'scheme-indent-function 0) | |
562 | (put 'with-values 'scheme-indent-function 1) | |
563 | ||
564 | (put 'syntax-table-define 'scheme-indent-function 2) | |
565 | (put 'list-transform-positive 'scheme-indent-function 1) | |
566 | (put 'list-transform-negative 'scheme-indent-function 1) | |
567 | (put 'list-search-positive 'scheme-indent-function 1) | |
568 | (put 'list-search-negative 'scheme-indent-function 1) | |
569 | ||
570 | (put 'access-components 'scheme-indent-function 1) | |
571 | (put 'assignment-components 'scheme-indent-function 1) | |
572 | (put 'combination-components 'scheme-indent-function 1) | |
573 | (put 'comment-components 'scheme-indent-function 1) | |
574 | (put 'conditional-components 'scheme-indent-function 1) | |
575 | (put 'disjunction-components 'scheme-indent-function 1) | |
576 | (put 'declaration-components 'scheme-indent-function 1) | |
577 | (put 'definition-components 'scheme-indent-function 1) | |
578 | (put 'delay-components 'scheme-indent-function 1) | |
579 | (put 'in-package-components 'scheme-indent-function 1) | |
580 | (put 'lambda-components 'scheme-indent-function 1) | |
581 | (put 'lambda-components* 'scheme-indent-function 1) | |
582 | (put 'lambda-components** 'scheme-indent-function 1) | |
583 | (put 'open-block-components 'scheme-indent-function 1) | |
584 | (put 'pathname-components 'scheme-indent-function 1) | |
585 | (put 'procedure-components 'scheme-indent-function 1) | |
586 | (put 'sequence-components 'scheme-indent-function 1) | |
587 | (put 'unassigned\?-components 'scheme-indent-function 1) | |
588 | (put 'unbound\?-components 'scheme-indent-function 1) | |
589 | (put 'variable-components 'scheme-indent-function 1))) | |
49116ac0 JB |
590 | |
591 | (provide 'scheme) | |
c88ab9ce ER |
592 | |
593 | ;;; scheme.el ends here |