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6594deb0 ER |
1 | ;;; prolog.el --- major mode for editing and running Prolog under Emacs |
2 | ||
9750e079 ER |
3 | ;; Copyright (C) 1986, 1987 Free Software Foundation, Inc. |
4 | ||
0acdb863 | 5 | ;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp> |
d7b4d18f | 6 | ;; Keywords: languages |
e5167999 | 7 | |
d8025917 | 8 | ;; This file is part of GNU Emacs. |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
d8025917 | 13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
23 | ;; Boston, MA 02111-1307, USA. | |
d8025917 | 24 | |
edbd2f74 ER |
25 | ;;; Commentary: |
26 | ||
27 | ;; This package provides a major mode for editing Prolog. It knows | |
28 | ;; about Prolog syntax and comments, and can send regions to an inferior | |
f614a1ae | 29 | ;; Prolog interpreter process. Font locking is tuned towards GNU Prolog. |
edbd2f74 | 30 | |
e5167999 ER |
31 | ;;; Code: |
32 | ||
d8025917 | 33 | (defvar prolog-mode-syntax-table nil) |
34 | (defvar prolog-mode-abbrev-table nil) | |
35 | (defvar prolog-mode-map nil) | |
c5292bc8 RS |
36 | |
37 | (defgroup prolog nil | |
38 | "Major mode for editing and running Prolog under Emacs" | |
39 | :group 'languages) | |
40 | ||
f614a1ae | 41 | |
c5292bc8 RS |
42 | (defcustom prolog-program-name "prolog" |
43 | "*Program name for invoking an inferior Prolog with `run-prolog'." | |
44 | :type 'string | |
45 | :group 'prolog) | |
d8025917 | 46 | |
c5292bc8 RS |
47 | (defcustom prolog-consult-string "reconsult(user).\n" |
48 | "*(Re)Consult mode (for C-Prolog and Quintus Prolog). " | |
49 | :type 'string | |
50 | :group 'prolog) | |
d8025917 | 51 | |
c5292bc8 RS |
52 | (defcustom prolog-compile-string "compile(user).\n" |
53 | "*Compile mode (for Quintus Prolog)." | |
54 | :type 'string | |
55 | :group 'prolog) | |
d8025917 | 56 | |
c5292bc8 | 57 | (defcustom prolog-eof-string "end_of_file.\n" |
d8025917 | 58 | "*String that represents end of file for prolog. |
c5292bc8 RS |
59 | nil means send actual operating system end of file." |
60 | :type 'string | |
61 | :group 'prolog) | |
d8025917 | 62 | |
c5292bc8 RS |
63 | (defcustom prolog-indent-width 4 |
64 | "Level of indentation in Prolog buffers." | |
65 | :type 'integer | |
66 | :group 'prolog) | |
d8025917 | 67 | |
f614a1ae TTN |
68 | (defvar prolog-font-lock-keywords |
69 | '(("\\(#[<=]=>\\|:-\\)\\|\\(#=\\)\\|\\(#[#<>\\/][=\\/]*\\|!\\)" | |
70 | 0 font-lock-keyword-face) | |
71 | ("\\<\\(is\\|write\\|nl\\|read_\\sw+\\)\\>" | |
72 | 1 font-lock-keyword-face) | |
73 | ("^\\(\\sw+\\)\\s-*\\((\\(.+\\))\\)*" | |
74 | (1 font-lock-function-name-face) | |
75 | (3 font-lock-variable-name-face))) | |
76 | "Font-lock keywords for Prolog mode.") | |
77 | ||
d8025917 | 78 | (if prolog-mode-syntax-table |
79 | () | |
80 | (let ((table (make-syntax-table))) | |
81 | (modify-syntax-entry ?_ "w" table) | |
82 | (modify-syntax-entry ?\\ "\\" table) | |
f614a1ae TTN |
83 | (modify-syntax-entry ?/ ". 14" table) |
84 | (modify-syntax-entry ?* ". 23" table) | |
d8025917 | 85 | (modify-syntax-entry ?+ "." table) |
86 | (modify-syntax-entry ?- "." table) | |
87 | (modify-syntax-entry ?= "." table) | |
88 | (modify-syntax-entry ?% "<" table) | |
673f4fc6 | 89 | (modify-syntax-entry ?\n ">" table) |
d8025917 | 90 | (modify-syntax-entry ?< "." table) |
91 | (modify-syntax-entry ?> "." table) | |
92 | (modify-syntax-entry ?\' "\"" table) | |
93 | (setq prolog-mode-syntax-table table))) | |
94 | ||
95 | (define-abbrev-table 'prolog-mode-abbrev-table ()) | |
96 | ||
97 | (defun prolog-mode-variables () | |
98 | (set-syntax-table prolog-mode-syntax-table) | |
99 | (setq local-abbrev-table prolog-mode-abbrev-table) | |
100 | (make-local-variable 'paragraph-start) | |
56414894 | 101 | (setq paragraph-start (concat "%%\\|$\\|" page-delimiter)) ;'%%..' |
d8025917 | 102 | (make-local-variable 'paragraph-separate) |
103 | (setq paragraph-separate paragraph-start) | |
104 | (make-local-variable 'paragraph-ignore-fill-prefix) | |
105 | (setq paragraph-ignore-fill-prefix t) | |
2c239c80 KH |
106 | (make-local-variable 'imenu-generic-expression) |
107 | (setq imenu-generic-expression "^[a-z][a-zA-Z0-9_]+") | |
d8025917 | 108 | (make-local-variable 'indent-line-function) |
109 | (setq indent-line-function 'prolog-indent-line) | |
110 | (make-local-variable 'comment-start) | |
111 | (setq comment-start "%") | |
112 | (make-local-variable 'comment-start-skip) | |
113 | (setq comment-start-skip "%+ *") | |
114 | (make-local-variable 'comment-column) | |
115 | (setq comment-column 48) | |
e41b2db1 ER |
116 | (make-local-variable 'comment-indent-function) |
117 | (setq comment-indent-function 'prolog-comment-indent)) | |
d8025917 | 118 | |
119 | (defun prolog-mode-commands (map) | |
120 | (define-key map "\t" 'prolog-indent-line) | |
121 | (define-key map "\e\C-x" 'prolog-consult-region)) | |
122 | ||
123 | (if prolog-mode-map | |
124 | nil | |
125 | (setq prolog-mode-map (make-sparse-keymap)) | |
126 | (prolog-mode-commands prolog-mode-map)) | |
127 | ||
f9f9507e | 128 | ;;;###autoload |
d8025917 | 129 | (defun prolog-mode () |
130 | "Major mode for editing Prolog code for Prologs. | |
131 | Blank lines and `%%...' separate paragraphs. `%'s start comments. | |
132 | Commands: | |
133 | \\{prolog-mode-map} | |
573f9b32 | 134 | Entry to this mode calls the value of `prolog-mode-hook' |
d8025917 | 135 | if that value is non-nil." |
136 | (interactive) | |
137 | (kill-all-local-variables) | |
138 | (use-local-map prolog-mode-map) | |
139 | (setq major-mode 'prolog-mode) | |
140 | (setq mode-name "Prolog") | |
141 | (prolog-mode-variables) | |
f614a1ae TTN |
142 | ;; font lock |
143 | (setq font-lock-defaults '(prolog-font-lock-keywords | |
144 | nil nil nil | |
145 | beginning-of-line)) | |
d8025917 | 146 | (run-hooks 'prolog-mode-hook)) |
147 | ||
148 | (defun prolog-indent-line (&optional whole-exp) | |
149 | "Indent current line as Prolog code. | |
150 | With argument, indent any additional lines of the same clause | |
151 | rigidly along with this one (not yet)." | |
152 | (interactive "p") | |
153 | (let ((indent (prolog-indent-level)) | |
154 | (pos (- (point-max) (point))) beg) | |
155 | (beginning-of-line) | |
156 | (setq beg (point)) | |
157 | (skip-chars-forward " \t") | |
158 | (if (zerop (- indent (current-column))) | |
159 | nil | |
160 | (delete-region beg (point)) | |
161 | (indent-to indent)) | |
162 | (if (> (- (point-max) pos) (point)) | |
163 | (goto-char (- (point-max) pos))) | |
164 | )) | |
165 | ||
166 | (defun prolog-indent-level () | |
167 | "Compute prolog indentation level." | |
168 | (save-excursion | |
169 | (beginning-of-line) | |
170 | (skip-chars-forward " \t") | |
171 | (cond | |
172 | ((looking-at "%%%") 0) ;Large comment starts | |
173 | ((looking-at "%[^%]") comment-column) ;Small comment starts | |
174 | ((bobp) 0) ;Beginning of buffer | |
175 | (t | |
176 | (let ((empty t) ind more less) | |
177 | (if (looking-at ")") | |
178 | (setq less t) ;Find close | |
179 | (setq less nil)) | |
180 | ;; See previous indentation | |
181 | (while empty | |
182 | (forward-line -1) | |
183 | (beginning-of-line) | |
184 | (if (bobp) | |
185 | (setq empty nil) | |
186 | (skip-chars-forward " \t") | |
187 | (if (not (or (looking-at "%[^%]") (looking-at "\n"))) | |
188 | (setq empty nil)))) | |
189 | (if (bobp) | |
190 | (setq ind 0) ;Beginning of buffer | |
191 | (setq ind (current-column))) ;Beginning of clause | |
192 | ;; See its beginning | |
193 | (if (looking-at "%%[^%]") | |
194 | ind | |
195 | ;; Real prolog code | |
196 | (if (looking-at "(") | |
197 | (setq more t) ;Find open | |
198 | (setq more nil)) | |
199 | ;; See its tail | |
200 | (end-of-prolog-clause) | |
201 | (or (bobp) (forward-char -1)) | |
202 | (cond ((looking-at "[,(;>]") | |
203 | (if (and more (looking-at "[^,]")) | |
204 | (+ ind prolog-indent-width) ;More indentation | |
205 | (max tab-width ind))) ;Same indentation | |
206 | ((looking-at "-") tab-width) ;TAB | |
207 | ((or less (looking-at "[^.]")) | |
208 | (max (- ind prolog-indent-width) 0)) ;Less indentation | |
209 | (t 0)) ;No indentation | |
210 | ))) | |
211 | ))) | |
212 | ||
213 | (defun end-of-prolog-clause () | |
214 | "Go to end of clause in this line." | |
215 | (beginning-of-line 1) | |
216 | (let* ((eolpos (save-excursion (end-of-line) (point)))) | |
217 | (if (re-search-forward comment-start-skip eolpos 'move) | |
218 | (goto-char (match-beginning 0))) | |
219 | (skip-chars-backward " \t"))) | |
220 | ||
221 | (defun prolog-comment-indent () | |
222 | "Compute prolog comment indentation." | |
223 | (cond ((looking-at "%%%") 0) | |
224 | ((looking-at "%%") (prolog-indent-level)) | |
225 | (t | |
226 | (save-excursion | |
227 | (skip-chars-backward " \t") | |
228 | ;; Insert one space at least, except at left margin. | |
229 | (max (+ (current-column) (if (bolp) 0 1)) | |
230 | comment-column))) | |
231 | )) | |
232 | ||
233 | \f | |
234 | ;;; | |
235 | ;;; Inferior prolog mode | |
236 | ;;; | |
237 | (defvar inferior-prolog-mode-map nil) | |
238 | ||
239 | (defun inferior-prolog-mode () | |
240 | "Major mode for interacting with an inferior Prolog process. | |
241 | ||
242 | The following commands are available: | |
243 | \\{inferior-prolog-mode-map} | |
244 | ||
573f9b32 RS |
245 | Entry to this mode calls the value of `prolog-mode-hook' with no arguments, |
246 | if that value is non-nil. Likewise with the value of `comint-mode-hook'. | |
247 | `prolog-mode-hook' is called after `comint-mode-hook'. | |
d8025917 | 248 | |
249 | You can send text to the inferior Prolog from other buffers | |
573f9b32 | 250 | using the commands `send-region', `send-string' and \\[prolog-consult-region]. |
d8025917 | 251 | |
252 | Commands: | |
253 | Tab indents for Prolog; with argument, shifts rest | |
254 | of expression rigidly with the current line. | |
573f9b32 RS |
255 | Paragraphs are separated only by blank lines and '%%'. |
256 | '%'s start comments. | |
d8025917 | 257 | |
258 | Return at end of buffer sends line as input. | |
259 | Return not at end copies rest of line to end and sends it. | |
260 | \\[comint-kill-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing. | |
261 | \\[comint-interrupt-subjob] interrupts the shell or its current subjob if any. | |
262 | \\[comint-stop-subjob] stops. \\[comint-quit-subjob] sends quit signal." | |
263 | (interactive) | |
264 | (require 'comint) | |
265 | (comint-mode) | |
266 | (setq major-mode 'inferior-prolog-mode | |
267 | mode-name "Inferior Prolog" | |
268 | comint-prompt-regexp "^| [ ?][- ] *") | |
269 | (prolog-mode-variables) | |
270 | (if inferior-prolog-mode-map nil | |
271 | (setq inferior-prolog-mode-map (copy-keymap comint-mode-map)) | |
272 | (prolog-mode-commands inferior-prolog-mode-map)) | |
273 | (use-local-map inferior-prolog-mode-map) | |
274 | (run-hooks 'prolog-mode-hook)) | |
275 | ||
f9f9507e | 276 | ;;;###autoload |
d8025917 | 277 | (defun run-prolog () |
278 | "Run an inferior Prolog process, input and output via buffer *prolog*." | |
279 | (interactive) | |
280 | (require 'comint) | |
281 | (switch-to-buffer (make-comint "prolog" prolog-program-name)) | |
282 | (inferior-prolog-mode)) | |
283 | ||
284 | (defun prolog-consult-region (compile beg end) | |
573f9b32 RS |
285 | "Send the region to the Prolog process made by \"M-x run-prolog\". |
286 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." | |
d8025917 | 287 | (interactive "P\nr") |
288 | (save-excursion | |
289 | (if compile | |
290 | (send-string "prolog" prolog-compile-string) | |
291 | (send-string "prolog" prolog-consult-string)) | |
292 | (send-region "prolog" beg end) | |
293 | (send-string "prolog" "\n") ;May be unnecessary | |
294 | (if prolog-eof-string | |
295 | (send-string "prolog" prolog-eof-string) | |
296 | (process-send-eof "prolog")))) ;Send eof to prolog process. | |
297 | ||
298 | (defun prolog-consult-region-and-go (compile beg end) | |
299 | "Send the region to the inferior Prolog, and switch to *prolog* buffer. | |
573f9b32 | 300 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." |
d8025917 | 301 | (interactive "P\nr") |
302 | (prolog-consult-region compile beg end) | |
303 | (switch-to-buffer "*prolog*")) | |
6594deb0 | 304 | |
896546cd RS |
305 | (provide 'prolog) |
306 | ||
ab5796a9 | 307 | ;;; arch-tag: f3ec6748-1272-4ab6-8826-c50cb1607636 |
6594deb0 | 308 | ;;; prolog.el ends here |