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6594deb0 ER |
1 | ;;; prolog.el --- major mode for editing and running Prolog under Emacs |
2 | ||
6b61353c | 3 | ;; Copyright (C) 1986, 1987, 2003, 2004 Free Software Foundation, Inc. |
9750e079 | 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 | ||
c5292bc8 RS |
33 | (defgroup prolog nil |
34 | "Major mode for editing and running Prolog under Emacs" | |
35 | :group 'languages) | |
36 | ||
f614a1ae | 37 | |
6b61353c KH |
38 | (defcustom prolog-program-name |
39 | (let ((names '("prolog" "gprolog"))) | |
40 | (while (and names | |
41 | (not (executable-find (car names)))) | |
42 | (setq names (cdr names))) | |
43 | (or (car names) "prolog")) | |
c5292bc8 RS |
44 | "*Program name for invoking an inferior Prolog with `run-prolog'." |
45 | :type 'string | |
46 | :group 'prolog) | |
d8025917 | 47 | |
c5292bc8 RS |
48 | (defcustom prolog-consult-string "reconsult(user).\n" |
49 | "*(Re)Consult mode (for C-Prolog and Quintus Prolog). " | |
50 | :type 'string | |
51 | :group 'prolog) | |
d8025917 | 52 | |
c5292bc8 RS |
53 | (defcustom prolog-compile-string "compile(user).\n" |
54 | "*Compile mode (for Quintus Prolog)." | |
55 | :type 'string | |
56 | :group 'prolog) | |
d8025917 | 57 | |
c5292bc8 | 58 | (defcustom prolog-eof-string "end_of_file.\n" |
d8025917 | 59 | "*String that represents end of file for prolog. |
c5292bc8 RS |
60 | nil means send actual operating system end of file." |
61 | :type 'string | |
62 | :group 'prolog) | |
d8025917 | 63 | |
c5292bc8 RS |
64 | (defcustom prolog-indent-width 4 |
65 | "Level of indentation in Prolog buffers." | |
66 | :type 'integer | |
67 | :group 'prolog) | |
d8025917 | 68 | |
f614a1ae TTN |
69 | (defvar prolog-font-lock-keywords |
70 | '(("\\(#[<=]=>\\|:-\\)\\|\\(#=\\)\\|\\(#[#<>\\/][=\\/]*\\|!\\)" | |
71 | 0 font-lock-keyword-face) | |
72 | ("\\<\\(is\\|write\\|nl\\|read_\\sw+\\)\\>" | |
73 | 1 font-lock-keyword-face) | |
74 | ("^\\(\\sw+\\)\\s-*\\((\\(.+\\))\\)*" | |
75 | (1 font-lock-function-name-face) | |
76 | (3 font-lock-variable-name-face))) | |
77 | "Font-lock keywords for Prolog mode.") | |
78 | ||
6b61353c | 79 | (defvar prolog-mode-syntax-table |
d8025917 | 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) | |
6b61353c | 93 | table)) |
d8025917 | 94 | |
6b61353c | 95 | (defvar prolog-mode-abbrev-table nil) |
d8025917 | 96 | (define-abbrev-table 'prolog-mode-abbrev-table ()) |
97 | ||
98 | (defun prolog-mode-variables () | |
d8025917 | 99 | (make-local-variable 'paragraph-separate) |
6b61353c | 100 | (setq paragraph-separate (concat "%%\\|$\\|" page-delimiter)) ;'%%..' |
d8025917 | 101 | (make-local-variable 'paragraph-ignore-fill-prefix) |
102 | (setq paragraph-ignore-fill-prefix t) | |
2c239c80 KH |
103 | (make-local-variable 'imenu-generic-expression) |
104 | (setq imenu-generic-expression "^[a-z][a-zA-Z0-9_]+") | |
d8025917 | 105 | (make-local-variable 'indent-line-function) |
106 | (setq indent-line-function 'prolog-indent-line) | |
107 | (make-local-variable 'comment-start) | |
108 | (setq comment-start "%") | |
109 | (make-local-variable 'comment-start-skip) | |
6b61353c KH |
110 | (setq comment-start-skip "\\(?:%+\\|/\\*+\\)[ \t]*") |
111 | (make-local-variable 'comment-end-skip) | |
112 | (setq comment-end-skip "[ \t]*\\(\n\\|\\*+/\\)") | |
d8025917 | 113 | (make-local-variable 'comment-column) |
6b61353c | 114 | (setq comment-column 48)) |
d8025917 | 115 | |
6b61353c KH |
116 | (defvar prolog-mode-map |
117 | (let ((map (make-sparse-keymap))) | |
118 | (define-key map "\e\C-x" 'prolog-consult-region) | |
119 | map)) | |
d8025917 | 120 | |
f9f9507e | 121 | ;;;###autoload |
d8025917 | 122 | (defun prolog-mode () |
123 | "Major mode for editing Prolog code for Prologs. | |
124 | Blank lines and `%%...' separate paragraphs. `%'s start comments. | |
125 | Commands: | |
126 | \\{prolog-mode-map} | |
573f9b32 | 127 | Entry to this mode calls the value of `prolog-mode-hook' |
d8025917 | 128 | if that value is non-nil." |
129 | (interactive) | |
130 | (kill-all-local-variables) | |
131 | (use-local-map prolog-mode-map) | |
6b61353c | 132 | (set-syntax-table prolog-mode-syntax-table) |
d8025917 | 133 | (setq major-mode 'prolog-mode) |
134 | (setq mode-name "Prolog") | |
135 | (prolog-mode-variables) | |
f614a1ae TTN |
136 | ;; font lock |
137 | (setq font-lock-defaults '(prolog-font-lock-keywords | |
138 | nil nil nil | |
139 | beginning-of-line)) | |
6b61353c | 140 | (run-mode-hooks 'prolog-mode-hook)) |
d8025917 | 141 | |
142 | (defun prolog-indent-line (&optional whole-exp) | |
143 | "Indent current line as Prolog code. | |
144 | With argument, indent any additional lines of the same clause | |
145 | rigidly along with this one (not yet)." | |
146 | (interactive "p") | |
147 | (let ((indent (prolog-indent-level)) | |
148 | (pos (- (point-max) (point))) beg) | |
149 | (beginning-of-line) | |
150 | (setq beg (point)) | |
151 | (skip-chars-forward " \t") | |
152 | (if (zerop (- indent (current-column))) | |
153 | nil | |
154 | (delete-region beg (point)) | |
155 | (indent-to indent)) | |
156 | (if (> (- (point-max) pos) (point)) | |
157 | (goto-char (- (point-max) pos))) | |
158 | )) | |
159 | ||
160 | (defun prolog-indent-level () | |
161 | "Compute prolog indentation level." | |
162 | (save-excursion | |
163 | (beginning-of-line) | |
164 | (skip-chars-forward " \t") | |
165 | (cond | |
166 | ((looking-at "%%%") 0) ;Large comment starts | |
167 | ((looking-at "%[^%]") comment-column) ;Small comment starts | |
168 | ((bobp) 0) ;Beginning of buffer | |
169 | (t | |
170 | (let ((empty t) ind more less) | |
171 | (if (looking-at ")") | |
172 | (setq less t) ;Find close | |
173 | (setq less nil)) | |
174 | ;; See previous indentation | |
175 | (while empty | |
176 | (forward-line -1) | |
177 | (beginning-of-line) | |
178 | (if (bobp) | |
179 | (setq empty nil) | |
180 | (skip-chars-forward " \t") | |
181 | (if (not (or (looking-at "%[^%]") (looking-at "\n"))) | |
182 | (setq empty nil)))) | |
183 | (if (bobp) | |
184 | (setq ind 0) ;Beginning of buffer | |
185 | (setq ind (current-column))) ;Beginning of clause | |
186 | ;; See its beginning | |
187 | (if (looking-at "%%[^%]") | |
188 | ind | |
189 | ;; Real prolog code | |
190 | (if (looking-at "(") | |
191 | (setq more t) ;Find open | |
192 | (setq more nil)) | |
193 | ;; See its tail | |
194 | (end-of-prolog-clause) | |
195 | (or (bobp) (forward-char -1)) | |
196 | (cond ((looking-at "[,(;>]") | |
197 | (if (and more (looking-at "[^,]")) | |
198 | (+ ind prolog-indent-width) ;More indentation | |
199 | (max tab-width ind))) ;Same indentation | |
200 | ((looking-at "-") tab-width) ;TAB | |
201 | ((or less (looking-at "[^.]")) | |
202 | (max (- ind prolog-indent-width) 0)) ;Less indentation | |
203 | (t 0)) ;No indentation | |
204 | ))) | |
205 | ))) | |
206 | ||
207 | (defun end-of-prolog-clause () | |
208 | "Go to end of clause in this line." | |
209 | (beginning-of-line 1) | |
210 | (let* ((eolpos (save-excursion (end-of-line) (point)))) | |
211 | (if (re-search-forward comment-start-skip eolpos 'move) | |
212 | (goto-char (match-beginning 0))) | |
213 | (skip-chars-backward " \t"))) | |
d8025917 | 214 | \f |
215 | ;;; | |
216 | ;;; Inferior prolog mode | |
217 | ;;; | |
6b61353c KH |
218 | (defvar inferior-prolog-mode-map |
219 | (let ((map (make-sparse-keymap))) | |
220 | ;; This map will inherit from `comint-mode-map' when entering | |
221 | ;; inferior-prolog-mode. | |
222 | map)) | |
223 | ||
224 | (defvar inferior-prolog-mode-syntax-table prolog-mode-syntax-table) | |
225 | (defvar inferior-prolog-mode-abbrev-table prolog-mode-abbrev-table) | |
d8025917 | 226 | |
6b61353c | 227 | (define-derived-mode inferior-prolog-mode comint-mode "Inferior Prolog" |
d8025917 | 228 | "Major mode for interacting with an inferior Prolog process. |
229 | ||
230 | The following commands are available: | |
231 | \\{inferior-prolog-mode-map} | |
232 | ||
573f9b32 RS |
233 | Entry to this mode calls the value of `prolog-mode-hook' with no arguments, |
234 | if that value is non-nil. Likewise with the value of `comint-mode-hook'. | |
235 | `prolog-mode-hook' is called after `comint-mode-hook'. | |
d8025917 | 236 | |
237 | You can send text to the inferior Prolog from other buffers | |
573f9b32 | 238 | using the commands `send-region', `send-string' and \\[prolog-consult-region]. |
d8025917 | 239 | |
240 | Commands: | |
241 | Tab indents for Prolog; with argument, shifts rest | |
242 | of expression rigidly with the current line. | |
573f9b32 RS |
243 | Paragraphs are separated only by blank lines and '%%'. |
244 | '%'s start comments. | |
d8025917 | 245 | |
246 | Return at end of buffer sends line as input. | |
247 | Return not at end copies rest of line to end and sends it. | |
248 | \\[comint-kill-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing. | |
249 | \\[comint-interrupt-subjob] interrupts the shell or its current subjob if any. | |
250 | \\[comint-stop-subjob] stops. \\[comint-quit-subjob] sends quit signal." | |
6b61353c KH |
251 | (setq comint-prompt-regexp "^| [ ?][- ] *") |
252 | (prolog-mode-variables)) | |
d8025917 | 253 | |
f9f9507e | 254 | ;;;###autoload |
d8025917 | 255 | (defun run-prolog () |
256 | "Run an inferior Prolog process, input and output via buffer *prolog*." | |
257 | (interactive) | |
258 | (require 'comint) | |
6b61353c | 259 | (pop-to-buffer (make-comint "prolog" prolog-program-name)) |
d8025917 | 260 | (inferior-prolog-mode)) |
261 | ||
262 | (defun prolog-consult-region (compile beg end) | |
573f9b32 RS |
263 | "Send the region to the Prolog process made by \"M-x run-prolog\". |
264 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." | |
d8025917 | 265 | (interactive "P\nr") |
266 | (save-excursion | |
267 | (if compile | |
268 | (send-string "prolog" prolog-compile-string) | |
269 | (send-string "prolog" prolog-consult-string)) | |
270 | (send-region "prolog" beg end) | |
271 | (send-string "prolog" "\n") ;May be unnecessary | |
272 | (if prolog-eof-string | |
273 | (send-string "prolog" prolog-eof-string) | |
274 | (process-send-eof "prolog")))) ;Send eof to prolog process. | |
275 | ||
276 | (defun prolog-consult-region-and-go (compile beg end) | |
277 | "Send the region to the inferior Prolog, and switch to *prolog* buffer. | |
573f9b32 | 278 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." |
d8025917 | 279 | (interactive "P\nr") |
280 | (prolog-consult-region compile beg end) | |
281 | (switch-to-buffer "*prolog*")) | |
6594deb0 | 282 | |
896546cd RS |
283 | (provide 'prolog) |
284 | ||
6b61353c | 285 | ;;; arch-tag: f3ec6748-1272-4ab6-8826-c50cb1607636 |
6594deb0 | 286 | ;;; prolog.el ends here |