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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 | ||
e5167999 | 5 | ;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet> |
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 | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
22 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
edbd2f74 ER |
24 | ;;; Commentary: |
25 | ||
26 | ;; This package provides a major mode for editing Prolog. It knows | |
27 | ;; about Prolog syntax and comments, and can send regions to an inferior | |
28 | ;; Prolog interpreter process. | |
29 | ||
e5167999 ER |
30 | ;;; Code: |
31 | ||
d8025917 | 32 | (defvar prolog-mode-syntax-table nil) |
33 | (defvar prolog-mode-abbrev-table nil) | |
34 | (defvar prolog-mode-map nil) | |
35 | ||
36 | (defvar prolog-program-name "prolog" | |
37 | "*Program name for invoking an inferior Prolog with `run-prolog'.") | |
38 | ||
39 | (defvar prolog-consult-string "reconsult(user).\n" | |
40 | "*(Re)Consult mode (for C-Prolog and Quintus Prolog). ") | |
41 | ||
42 | (defvar prolog-compile-string "compile(user).\n" | |
43 | "*Compile mode (for Quintus Prolog).") | |
44 | ||
45 | (defvar prolog-eof-string "end_of_file.\n" | |
46 | "*String that represents end of file for prolog. | |
573f9b32 | 47 | nil means send actual operating system end of file.") |
d8025917 | 48 | |
49 | (defvar prolog-indent-width 4) | |
50 | ||
51 | (if prolog-mode-syntax-table | |
52 | () | |
53 | (let ((table (make-syntax-table))) | |
54 | (modify-syntax-entry ?_ "w" table) | |
55 | (modify-syntax-entry ?\\ "\\" table) | |
56 | (modify-syntax-entry ?/ "." table) | |
57 | (modify-syntax-entry ?* "." table) | |
58 | (modify-syntax-entry ?+ "." table) | |
59 | (modify-syntax-entry ?- "." table) | |
60 | (modify-syntax-entry ?= "." table) | |
61 | (modify-syntax-entry ?% "<" table) | |
62 | (modify-syntax-entry ?< "." table) | |
63 | (modify-syntax-entry ?> "." table) | |
64 | (modify-syntax-entry ?\' "\"" table) | |
65 | (setq prolog-mode-syntax-table table))) | |
66 | ||
67 | (define-abbrev-table 'prolog-mode-abbrev-table ()) | |
68 | ||
69 | (defun prolog-mode-variables () | |
70 | (set-syntax-table prolog-mode-syntax-table) | |
71 | (setq local-abbrev-table prolog-mode-abbrev-table) | |
72 | (make-local-variable 'paragraph-start) | |
73 | (setq paragraph-start (concat "^%%\\|^$\\|" page-delimiter)) ;'%%..' | |
74 | (make-local-variable 'paragraph-separate) | |
75 | (setq paragraph-separate paragraph-start) | |
76 | (make-local-variable 'paragraph-ignore-fill-prefix) | |
77 | (setq paragraph-ignore-fill-prefix t) | |
78 | (make-local-variable 'indent-line-function) | |
79 | (setq indent-line-function 'prolog-indent-line) | |
80 | (make-local-variable 'comment-start) | |
81 | (setq comment-start "%") | |
82 | (make-local-variable 'comment-start-skip) | |
83 | (setq comment-start-skip "%+ *") | |
84 | (make-local-variable 'comment-column) | |
85 | (setq comment-column 48) | |
e41b2db1 ER |
86 | (make-local-variable 'comment-indent-function) |
87 | (setq comment-indent-function 'prolog-comment-indent)) | |
d8025917 | 88 | |
89 | (defun prolog-mode-commands (map) | |
90 | (define-key map "\t" 'prolog-indent-line) | |
91 | (define-key map "\e\C-x" 'prolog-consult-region)) | |
92 | ||
93 | (if prolog-mode-map | |
94 | nil | |
95 | (setq prolog-mode-map (make-sparse-keymap)) | |
96 | (prolog-mode-commands prolog-mode-map)) | |
97 | ||
f9f9507e | 98 | ;;;###autoload |
d8025917 | 99 | (defun prolog-mode () |
100 | "Major mode for editing Prolog code for Prologs. | |
101 | Blank lines and `%%...' separate paragraphs. `%'s start comments. | |
102 | Commands: | |
103 | \\{prolog-mode-map} | |
573f9b32 | 104 | Entry to this mode calls the value of `prolog-mode-hook' |
d8025917 | 105 | if that value is non-nil." |
106 | (interactive) | |
107 | (kill-all-local-variables) | |
108 | (use-local-map prolog-mode-map) | |
109 | (setq major-mode 'prolog-mode) | |
110 | (setq mode-name "Prolog") | |
111 | (prolog-mode-variables) | |
112 | (run-hooks 'prolog-mode-hook)) | |
113 | ||
114 | (defun prolog-indent-line (&optional whole-exp) | |
115 | "Indent current line as Prolog code. | |
116 | With argument, indent any additional lines of the same clause | |
117 | rigidly along with this one (not yet)." | |
118 | (interactive "p") | |
119 | (let ((indent (prolog-indent-level)) | |
120 | (pos (- (point-max) (point))) beg) | |
121 | (beginning-of-line) | |
122 | (setq beg (point)) | |
123 | (skip-chars-forward " \t") | |
124 | (if (zerop (- indent (current-column))) | |
125 | nil | |
126 | (delete-region beg (point)) | |
127 | (indent-to indent)) | |
128 | (if (> (- (point-max) pos) (point)) | |
129 | (goto-char (- (point-max) pos))) | |
130 | )) | |
131 | ||
132 | (defun prolog-indent-level () | |
133 | "Compute prolog indentation level." | |
134 | (save-excursion | |
135 | (beginning-of-line) | |
136 | (skip-chars-forward " \t") | |
137 | (cond | |
138 | ((looking-at "%%%") 0) ;Large comment starts | |
139 | ((looking-at "%[^%]") comment-column) ;Small comment starts | |
140 | ((bobp) 0) ;Beginning of buffer | |
141 | (t | |
142 | (let ((empty t) ind more less) | |
143 | (if (looking-at ")") | |
144 | (setq less t) ;Find close | |
145 | (setq less nil)) | |
146 | ;; See previous indentation | |
147 | (while empty | |
148 | (forward-line -1) | |
149 | (beginning-of-line) | |
150 | (if (bobp) | |
151 | (setq empty nil) | |
152 | (skip-chars-forward " \t") | |
153 | (if (not (or (looking-at "%[^%]") (looking-at "\n"))) | |
154 | (setq empty nil)))) | |
155 | (if (bobp) | |
156 | (setq ind 0) ;Beginning of buffer | |
157 | (setq ind (current-column))) ;Beginning of clause | |
158 | ;; See its beginning | |
159 | (if (looking-at "%%[^%]") | |
160 | ind | |
161 | ;; Real prolog code | |
162 | (if (looking-at "(") | |
163 | (setq more t) ;Find open | |
164 | (setq more nil)) | |
165 | ;; See its tail | |
166 | (end-of-prolog-clause) | |
167 | (or (bobp) (forward-char -1)) | |
168 | (cond ((looking-at "[,(;>]") | |
169 | (if (and more (looking-at "[^,]")) | |
170 | (+ ind prolog-indent-width) ;More indentation | |
171 | (max tab-width ind))) ;Same indentation | |
172 | ((looking-at "-") tab-width) ;TAB | |
173 | ((or less (looking-at "[^.]")) | |
174 | (max (- ind prolog-indent-width) 0)) ;Less indentation | |
175 | (t 0)) ;No indentation | |
176 | ))) | |
177 | ))) | |
178 | ||
179 | (defun end-of-prolog-clause () | |
180 | "Go to end of clause in this line." | |
181 | (beginning-of-line 1) | |
182 | (let* ((eolpos (save-excursion (end-of-line) (point)))) | |
183 | (if (re-search-forward comment-start-skip eolpos 'move) | |
184 | (goto-char (match-beginning 0))) | |
185 | (skip-chars-backward " \t"))) | |
186 | ||
187 | (defun prolog-comment-indent () | |
188 | "Compute prolog comment indentation." | |
189 | (cond ((looking-at "%%%") 0) | |
190 | ((looking-at "%%") (prolog-indent-level)) | |
191 | (t | |
192 | (save-excursion | |
193 | (skip-chars-backward " \t") | |
194 | ;; Insert one space at least, except at left margin. | |
195 | (max (+ (current-column) (if (bolp) 0 1)) | |
196 | comment-column))) | |
197 | )) | |
198 | ||
199 | \f | |
200 | ;;; | |
201 | ;;; Inferior prolog mode | |
202 | ;;; | |
203 | (defvar inferior-prolog-mode-map nil) | |
204 | ||
205 | (defun inferior-prolog-mode () | |
206 | "Major mode for interacting with an inferior Prolog process. | |
207 | ||
208 | The following commands are available: | |
209 | \\{inferior-prolog-mode-map} | |
210 | ||
573f9b32 RS |
211 | Entry to this mode calls the value of `prolog-mode-hook' with no arguments, |
212 | if that value is non-nil. Likewise with the value of `comint-mode-hook'. | |
213 | `prolog-mode-hook' is called after `comint-mode-hook'. | |
d8025917 | 214 | |
215 | You can send text to the inferior Prolog from other buffers | |
573f9b32 | 216 | using the commands `send-region', `send-string' and \\[prolog-consult-region]. |
d8025917 | 217 | |
218 | Commands: | |
219 | Tab indents for Prolog; with argument, shifts rest | |
220 | of expression rigidly with the current line. | |
573f9b32 RS |
221 | Paragraphs are separated only by blank lines and '%%'. |
222 | '%'s start comments. | |
d8025917 | 223 | |
224 | Return at end of buffer sends line as input. | |
225 | Return not at end copies rest of line to end and sends it. | |
226 | \\[comint-kill-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing. | |
227 | \\[comint-interrupt-subjob] interrupts the shell or its current subjob if any. | |
228 | \\[comint-stop-subjob] stops. \\[comint-quit-subjob] sends quit signal." | |
229 | (interactive) | |
230 | (require 'comint) | |
231 | (comint-mode) | |
232 | (setq major-mode 'inferior-prolog-mode | |
233 | mode-name "Inferior Prolog" | |
234 | comint-prompt-regexp "^| [ ?][- ] *") | |
235 | (prolog-mode-variables) | |
236 | (if inferior-prolog-mode-map nil | |
237 | (setq inferior-prolog-mode-map (copy-keymap comint-mode-map)) | |
238 | (prolog-mode-commands inferior-prolog-mode-map)) | |
239 | (use-local-map inferior-prolog-mode-map) | |
240 | (run-hooks 'prolog-mode-hook)) | |
241 | ||
f9f9507e | 242 | ;;;###autoload |
d8025917 | 243 | (defun run-prolog () |
244 | "Run an inferior Prolog process, input and output via buffer *prolog*." | |
245 | (interactive) | |
246 | (require 'comint) | |
247 | (switch-to-buffer (make-comint "prolog" prolog-program-name)) | |
248 | (inferior-prolog-mode)) | |
249 | ||
250 | (defun prolog-consult-region (compile beg end) | |
573f9b32 RS |
251 | "Send the region to the Prolog process made by \"M-x run-prolog\". |
252 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." | |
d8025917 | 253 | (interactive "P\nr") |
254 | (save-excursion | |
255 | (if compile | |
256 | (send-string "prolog" prolog-compile-string) | |
257 | (send-string "prolog" prolog-consult-string)) | |
258 | (send-region "prolog" beg end) | |
259 | (send-string "prolog" "\n") ;May be unnecessary | |
260 | (if prolog-eof-string | |
261 | (send-string "prolog" prolog-eof-string) | |
262 | (process-send-eof "prolog")))) ;Send eof to prolog process. | |
263 | ||
264 | (defun prolog-consult-region-and-go (compile beg end) | |
265 | "Send the region to the inferior Prolog, and switch to *prolog* buffer. | |
573f9b32 | 266 | If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode." |
d8025917 | 267 | (interactive "P\nr") |
268 | (prolog-consult-region compile beg end) | |
269 | (switch-to-buffer "*prolog*")) | |
6594deb0 ER |
270 | |
271 | ;;; prolog.el ends here |