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6594deb0 ER |
1 | ;;; prolog.el --- major mode for editing and running Prolog under Emacs |
2 | ||
034babe1 NR |
3 | ;; Copyright (C) 1986, 1987, 2001, 2002, 2003, 2004, 2005 |
4 | ;; Free Software Foundation, Inc. | |
9750e079 | 5 | |
0acdb863 | 6 | ;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp> |
d7b4d18f | 7 | ;; Keywords: languages |
e5167999 | 8 | |
d8025917 | 9 | ;; This file is part of GNU Emacs. |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 13 | ;; the Free Software Foundation; either version 2, or (at your option) |
d8025917 | 14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 | 22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
3a35cf56 LK |
23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | ;; Boston, MA 02110-1301, USA. | |
d8025917 | 25 | |
edbd2f74 ER |
26 | ;;; Commentary: |
27 | ||
28 | ;; This package provides a major mode for editing Prolog. It knows | |
29 | ;; about Prolog syntax and comments, and can send regions to an inferior | |
f614a1ae | 30 | ;; Prolog interpreter process. Font locking is tuned towards GNU Prolog. |
edbd2f74 | 31 | |
e5167999 ER |
32 | ;;; Code: |
33 | ||
4e186ad5 JB |
34 | (defvar comint-prompt-regexp) |
35 | ||
36 | ||
c5292bc8 | 37 | (defgroup prolog nil |
73efac49 | 38 | "Major mode for editing and running Prolog under Emacs." |
c5292bc8 RS |
39 | :group 'languages) |
40 | ||
f614a1ae | 41 | |
6cfd4f3a SM |
42 | (defcustom prolog-program-name |
43 | (let ((names '("prolog" "gprolog"))) | |
44 | (while (and names | |
45 | (not (executable-find (car names)))) | |
46 | (setq names (cdr names))) | |
47 | (or (car names) "prolog")) | |
c5292bc8 RS |
48 | "*Program name for invoking an inferior Prolog with `run-prolog'." |
49 | :type 'string | |
50 | :group 'prolog) | |
d8025917 | 51 | |
c5292bc8 RS |
52 | (defcustom prolog-consult-string "reconsult(user).\n" |
53 | "*(Re)Consult mode (for C-Prolog and Quintus Prolog). " | |
54 | :type 'string | |
55 | :group 'prolog) | |
d8025917 | 56 | |
c5292bc8 RS |
57 | (defcustom prolog-compile-string "compile(user).\n" |
58 | "*Compile mode (for Quintus Prolog)." | |
59 | :type 'string | |
60 | :group 'prolog) | |
d8025917 | 61 | |
c5292bc8 | 62 | (defcustom prolog-eof-string "end_of_file.\n" |
c6c5714e JB |
63 | "*String that represents end of file for Prolog. |
64 | When nil, send actual operating system end of file." | |
c5292bc8 RS |
65 | :type 'string |
66 | :group 'prolog) | |
d8025917 | 67 | |
c5292bc8 RS |
68 | (defcustom prolog-indent-width 4 |
69 | "Level of indentation in Prolog buffers." | |
70 | :type 'integer | |
71 | :group 'prolog) | |
d8025917 | 72 | |
f614a1ae TTN |
73 | (defvar prolog-font-lock-keywords |
74 | '(("\\(#[<=]=>\\|:-\\)\\|\\(#=\\)\\|\\(#[#<>\\/][=\\/]*\\|!\\)" | |
75 | 0 font-lock-keyword-face) | |
76 | ("\\<\\(is\\|write\\|nl\\|read_\\sw+\\)\\>" | |
77 | 1 font-lock-keyword-face) | |
78 | ("^\\(\\sw+\\)\\s-*\\((\\(.+\\))\\)*" | |
79 | (1 font-lock-function-name-face) | |
80 | (3 font-lock-variable-name-face))) | |
81 | "Font-lock keywords for Prolog mode.") | |
82 | ||
6cfd4f3a | 83 | (defvar prolog-mode-syntax-table |
d8025917 | 84 | (let ((table (make-syntax-table))) |
85 | (modify-syntax-entry ?_ "w" table) | |
86 | (modify-syntax-entry ?\\ "\\" table) | |
f614a1ae TTN |
87 | (modify-syntax-entry ?/ ". 14" table) |
88 | (modify-syntax-entry ?* ". 23" table) | |
d8025917 | 89 | (modify-syntax-entry ?+ "." table) |
90 | (modify-syntax-entry ?- "." table) | |
91 | (modify-syntax-entry ?= "." table) | |
92 | (modify-syntax-entry ?% "<" table) | |
673f4fc6 | 93 | (modify-syntax-entry ?\n ">" table) |
d8025917 | 94 | (modify-syntax-entry ?< "." table) |
95 | (modify-syntax-entry ?> "." table) | |
96 | (modify-syntax-entry ?\' "\"" table) | |
6cfd4f3a | 97 | table)) |
d8025917 | 98 | |
6cfd4f3a | 99 | (defvar prolog-mode-abbrev-table nil) |
d8025917 | 100 | (define-abbrev-table 'prolog-mode-abbrev-table ()) |
101 | ||
102 | (defun prolog-mode-variables () | |
d8025917 | 103 | (make-local-variable 'paragraph-separate) |
6cfd4f3a | 104 | (setq paragraph-separate (concat "%%\\|$\\|" page-delimiter)) ;'%%..' |
d8025917 | 105 | (make-local-variable 'paragraph-ignore-fill-prefix) |
106 | (setq paragraph-ignore-fill-prefix t) | |
2c239c80 | 107 | (make-local-variable 'imenu-generic-expression) |
d8059b03 | 108 | (setq imenu-generic-expression '((nil "^\\sw+" 0))) |
d8025917 | 109 | (make-local-variable 'indent-line-function) |
110 | (setq indent-line-function 'prolog-indent-line) | |
111 | (make-local-variable 'comment-start) | |
112 | (setq comment-start "%") | |
113 | (make-local-variable 'comment-start-skip) | |
6cfd4f3a SM |
114 | (setq comment-start-skip "\\(?:%+\\|/\\*+\\)[ \t]*") |
115 | (make-local-variable 'comment-end-skip) | |
116 | (setq comment-end-skip "[ \t]*\\(\n\\|\\*+/\\)") | |
d8025917 | 117 | (make-local-variable 'comment-column) |
6cfd4f3a | 118 | (setq comment-column 48)) |
d8025917 | 119 | |
6cfd4f3a SM |
120 | (defvar prolog-mode-map |
121 | (let ((map (make-sparse-keymap))) | |
122 | (define-key map "\e\C-x" 'prolog-consult-region) | |
123 | map)) | |
d8025917 | 124 | |
f9f9507e | 125 | ;;;###autoload |
d8025917 | 126 | (defun prolog-mode () |
127 | "Major mode for editing Prolog code for Prologs. | |
128 | Blank lines and `%%...' separate paragraphs. `%'s start comments. | |
129 | Commands: | |
130 | \\{prolog-mode-map} | |
573f9b32 | 131 | Entry to this mode calls the value of `prolog-mode-hook' |
d8025917 | 132 | if that value is non-nil." |
133 | (interactive) | |
134 | (kill-all-local-variables) | |
135 | (use-local-map prolog-mode-map) | |
6cfd4f3a | 136 | (set-syntax-table prolog-mode-syntax-table) |
d8025917 | 137 | (setq major-mode 'prolog-mode) |
138 | (setq mode-name "Prolog") | |
139 | (prolog-mode-variables) | |
f614a1ae TTN |
140 | ;; font lock |
141 | (setq font-lock-defaults '(prolog-font-lock-keywords | |
142 | nil nil nil | |
143 | beginning-of-line)) | |
6cfd4f3a | 144 | (run-mode-hooks 'prolog-mode-hook)) |
d8025917 | 145 | |
146 | (defun prolog-indent-line (&optional whole-exp) | |
147 | "Indent current line as Prolog code. | |
148 | With argument, indent any additional lines of the same clause | |
149 | rigidly along with this one (not yet)." | |
150 | (interactive "p") | |
151 | (let ((indent (prolog-indent-level)) | |
152 | (pos (- (point-max) (point))) beg) | |
153 | (beginning-of-line) | |
154 | (setq beg (point)) | |
155 | (skip-chars-forward " \t") | |
156 | (if (zerop (- indent (current-column))) | |
157 | nil | |
158 | (delete-region beg (point)) | |
159 | (indent-to indent)) | |
160 | (if (> (- (point-max) pos) (point)) | |
161 | (goto-char (- (point-max) pos))) | |
162 | )) | |
163 | ||
164 | (defun prolog-indent-level () | |
c6c5714e | 165 | "Compute Prolog indentation level." |
d8025917 | 166 | (save-excursion |
167 | (beginning-of-line) | |
168 | (skip-chars-forward " \t") | |
169 | (cond | |
170 | ((looking-at "%%%") 0) ;Large comment starts | |
171 | ((looking-at "%[^%]") comment-column) ;Small comment starts | |
172 | ((bobp) 0) ;Beginning of buffer | |
173 | (t | |
174 | (let ((empty t) ind more less) | |
175 | (if (looking-at ")") | |
176 | (setq less t) ;Find close | |
177 | (setq less nil)) | |
178 | ;; See previous indentation | |
179 | (while empty | |
180 | (forward-line -1) | |
181 | (beginning-of-line) | |
182 | (if (bobp) | |
183 | (setq empty nil) | |
184 | (skip-chars-forward " \t") | |
185 | (if (not (or (looking-at "%[^%]") (looking-at "\n"))) | |
186 | (setq empty nil)))) | |
187 | (if (bobp) | |
188 | (setq ind 0) ;Beginning of buffer | |
189 | (setq ind (current-column))) ;Beginning of clause | |
190 | ;; See its beginning | |
191 | (if (looking-at "%%[^%]") | |
192 | ind | |
193 | ;; Real prolog code | |
194 | (if (looking-at "(") | |
195 | (setq more t) ;Find open | |
196 | (setq more nil)) | |
197 | ;; See its tail | |
198 | (end-of-prolog-clause) | |
199 | (or (bobp) (forward-char -1)) | |
200 | (cond ((looking-at "[,(;>]") | |
201 | (if (and more (looking-at "[^,]")) | |
202 | (+ ind prolog-indent-width) ;More indentation | |
203 | (max tab-width ind))) ;Same indentation | |
204 | ((looking-at "-") tab-width) ;TAB | |
205 | ((or less (looking-at "[^.]")) | |
206 | (max (- ind prolog-indent-width) 0)) ;Less indentation | |
207 | (t 0)) ;No indentation | |
208 | ))) | |
209 | ))) | |
210 | ||
211 | (defun end-of-prolog-clause () | |
212 | "Go to end of clause in this line." | |
213 | (beginning-of-line 1) | |
214 | (let* ((eolpos (save-excursion (end-of-line) (point)))) | |
215 | (if (re-search-forward comment-start-skip eolpos 'move) | |
216 | (goto-char (match-beginning 0))) | |
217 | (skip-chars-backward " \t"))) | |
d8025917 | 218 | \f |
219 | ;;; | |
220 | ;;; Inferior prolog mode | |
221 | ;;; | |
6cfd4f3a SM |
222 | (defvar inferior-prolog-mode-map |
223 | (let ((map (make-sparse-keymap))) | |
224 | ;; This map will inherit from `comint-mode-map' when entering | |
225 | ;; inferior-prolog-mode. | |
226 | map)) | |
227 | ||
228 | (defvar inferior-prolog-mode-syntax-table prolog-mode-syntax-table) | |
229 | (defvar inferior-prolog-mode-abbrev-table prolog-mode-abbrev-table) | |
d8025917 | 230 | |
6cfd4f3a | 231 | (define-derived-mode inferior-prolog-mode comint-mode "Inferior Prolog" |
d8025917 | 232 | "Major mode for interacting with an inferior Prolog process. |
233 | ||
234 | The following commands are available: | |
235 | \\{inferior-prolog-mode-map} | |
236 | ||
573f9b32 RS |
237 | Entry to this mode calls the value of `prolog-mode-hook' with no arguments, |
238 | if that value is non-nil. Likewise with the value of `comint-mode-hook'. | |
239 | `prolog-mode-hook' is called after `comint-mode-hook'. | |
d8025917 | 240 | |
c647adda JB |
241 | You can send text to the inferior Prolog from other buffers using the commands |
242 | `process-send-region', `process-send-string' and \\[prolog-consult-region]. | |
d8025917 | 243 | |
244 | Commands: | |
245 | Tab indents for Prolog; with argument, shifts rest | |
246 | of expression rigidly with the current line. | |
573f9b32 RS |
247 | Paragraphs are separated only by blank lines and '%%'. |
248 | '%'s start comments. | |
d8025917 | 249 | |
250 | Return at end of buffer sends line as input. | |
251 | Return not at end copies rest of line to end and sends it. | |
252 | \\[comint-kill-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing. | |
253 | \\[comint-interrupt-subjob] interrupts the shell or its current subjob if any. | |
254 | \\[comint-stop-subjob] stops. \\[comint-quit-subjob] sends quit signal." | |
6cfd4f3a SM |
255 | (setq comint-prompt-regexp "^| [ ?][- ] *") |
256 | (prolog-mode-variables)) | |
d8025917 | 257 | |
f9f9507e | 258 | ;;;###autoload |
d8025917 | 259 | (defun run-prolog () |
260 | "Run an inferior Prolog process, input and output via buffer *prolog*." | |
261 | (interactive) | |
262 | (require 'comint) | |
6cfd4f3a | 263 | (pop-to-buffer (make-comint "prolog" prolog-program-name)) |
d8025917 | 264 | (inferior-prolog-mode)) |
265 | ||
266 | (defun prolog-consult-region (compile beg end) | |
573f9b32 RS |
267 | "Send the region to the Prolog process made by \"M-x run-prolog\". |
268 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." | |
d8025917 | 269 | (interactive "P\nr") |
270 | (save-excursion | |
271 | (if compile | |
c647adda JB |
272 | (process-send-string "prolog" prolog-compile-string) |
273 | (process-send-string "prolog" prolog-consult-string)) | |
274 | (process-send-region "prolog" beg end) | |
275 | (process-send-string "prolog" "\n") ;May be unnecessary | |
d8025917 | 276 | (if prolog-eof-string |
c647adda | 277 | (process-send-string "prolog" prolog-eof-string) |
d8025917 | 278 | (process-send-eof "prolog")))) ;Send eof to prolog process. |
279 | ||
280 | (defun prolog-consult-region-and-go (compile beg end) | |
281 | "Send the region to the inferior Prolog, and switch to *prolog* buffer. | |
573f9b32 | 282 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." |
d8025917 | 283 | (interactive "P\nr") |
284 | (prolog-consult-region compile beg end) | |
285 | (switch-to-buffer "*prolog*")) | |
6594deb0 | 286 | |
896546cd RS |
287 | (provide 'prolog) |
288 | ||
ab5796a9 | 289 | ;;; arch-tag: f3ec6748-1272-4ab6-8826-c50cb1607636 |
6594deb0 | 290 | ;;; prolog.el ends here |