d8025917 |
1 | ;; Major mode for editing Prolog, and for running Prolog under Emacs |
2 | ;; Copyright (C) 1986, 1987 Free Software Foundation, Inc. |
3 | ;; Author Masanobu UMEDA (umerin@flab.flab.fujitsu.junet) |
4 | |
5 | ;; This file is part of GNU Emacs. |
6 | |
7 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
8 | ;; it under the terms of the GNU General Public License as published by |
9 | ;; the Free Software Foundation; either version 1, or (at your option) |
10 | ;; any later version. |
11 | |
12 | ;; GNU Emacs is distributed in the hope that it will be useful, |
13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | ;; GNU General Public License for more details. |
16 | |
17 | ;; You should have received a copy of the GNU General Public License |
18 | ;; along with GNU Emacs; see the file COPYING. If not, write to |
19 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | |
21 | (defvar prolog-mode-syntax-table nil) |
22 | (defvar prolog-mode-abbrev-table nil) |
23 | (defvar prolog-mode-map nil) |
24 | |
25 | (defvar prolog-program-name "prolog" |
26 | "*Program name for invoking an inferior Prolog with `run-prolog'.") |
27 | |
28 | (defvar prolog-consult-string "reconsult(user).\n" |
29 | "*(Re)Consult mode (for C-Prolog and Quintus Prolog). ") |
30 | |
31 | (defvar prolog-compile-string "compile(user).\n" |
32 | "*Compile mode (for Quintus Prolog).") |
33 | |
34 | (defvar prolog-eof-string "end_of_file.\n" |
35 | "*String that represents end of file for prolog. |
36 | nil means send actual operaing system end of file.") |
37 | |
38 | (defvar prolog-indent-width 4) |
39 | |
40 | (if prolog-mode-syntax-table |
41 | () |
42 | (let ((table (make-syntax-table))) |
43 | (modify-syntax-entry ?_ "w" table) |
44 | (modify-syntax-entry ?\\ "\\" table) |
45 | (modify-syntax-entry ?/ "." table) |
46 | (modify-syntax-entry ?* "." table) |
47 | (modify-syntax-entry ?+ "." table) |
48 | (modify-syntax-entry ?- "." table) |
49 | (modify-syntax-entry ?= "." table) |
50 | (modify-syntax-entry ?% "<" table) |
51 | (modify-syntax-entry ?< "." table) |
52 | (modify-syntax-entry ?> "." table) |
53 | (modify-syntax-entry ?\' "\"" table) |
54 | (setq prolog-mode-syntax-table table))) |
55 | |
56 | (define-abbrev-table 'prolog-mode-abbrev-table ()) |
57 | |
58 | (defun prolog-mode-variables () |
59 | (set-syntax-table prolog-mode-syntax-table) |
60 | (setq local-abbrev-table prolog-mode-abbrev-table) |
61 | (make-local-variable 'paragraph-start) |
62 | (setq paragraph-start (concat "^%%\\|^$\\|" page-delimiter)) ;'%%..' |
63 | (make-local-variable 'paragraph-separate) |
64 | (setq paragraph-separate paragraph-start) |
65 | (make-local-variable 'paragraph-ignore-fill-prefix) |
66 | (setq paragraph-ignore-fill-prefix t) |
67 | (make-local-variable 'indent-line-function) |
68 | (setq indent-line-function 'prolog-indent-line) |
69 | (make-local-variable 'comment-start) |
70 | (setq comment-start "%") |
71 | (make-local-variable 'comment-start-skip) |
72 | (setq comment-start-skip "%+ *") |
73 | (make-local-variable 'comment-column) |
74 | (setq comment-column 48) |
75 | (make-local-variable 'comment-indent-hook) |
76 | (setq comment-indent-hook 'prolog-comment-indent)) |
77 | |
78 | (defun prolog-mode-commands (map) |
79 | (define-key map "\t" 'prolog-indent-line) |
80 | (define-key map "\e\C-x" 'prolog-consult-region)) |
81 | |
82 | (if prolog-mode-map |
83 | nil |
84 | (setq prolog-mode-map (make-sparse-keymap)) |
85 | (prolog-mode-commands prolog-mode-map)) |
86 | |
87 | (defun prolog-mode () |
88 | "Major mode for editing Prolog code for Prologs. |
89 | Blank lines and `%%...' separate paragraphs. `%'s start comments. |
90 | Commands: |
91 | \\{prolog-mode-map} |
92 | Entry to this mode calls the value of prolog-mode-hook |
93 | if that value is non-nil." |
94 | (interactive) |
95 | (kill-all-local-variables) |
96 | (use-local-map prolog-mode-map) |
97 | (setq major-mode 'prolog-mode) |
98 | (setq mode-name "Prolog") |
99 | (prolog-mode-variables) |
100 | (run-hooks 'prolog-mode-hook)) |
101 | |
102 | (defun prolog-indent-line (&optional whole-exp) |
103 | "Indent current line as Prolog code. |
104 | With argument, indent any additional lines of the same clause |
105 | rigidly along with this one (not yet)." |
106 | (interactive "p") |
107 | (let ((indent (prolog-indent-level)) |
108 | (pos (- (point-max) (point))) beg) |
109 | (beginning-of-line) |
110 | (setq beg (point)) |
111 | (skip-chars-forward " \t") |
112 | (if (zerop (- indent (current-column))) |
113 | nil |
114 | (delete-region beg (point)) |
115 | (indent-to indent)) |
116 | (if (> (- (point-max) pos) (point)) |
117 | (goto-char (- (point-max) pos))) |
118 | )) |
119 | |
120 | (defun prolog-indent-level () |
121 | "Compute prolog indentation level." |
122 | (save-excursion |
123 | (beginning-of-line) |
124 | (skip-chars-forward " \t") |
125 | (cond |
126 | ((looking-at "%%%") 0) ;Large comment starts |
127 | ((looking-at "%[^%]") comment-column) ;Small comment starts |
128 | ((bobp) 0) ;Beginning of buffer |
129 | (t |
130 | (let ((empty t) ind more less) |
131 | (if (looking-at ")") |
132 | (setq less t) ;Find close |
133 | (setq less nil)) |
134 | ;; See previous indentation |
135 | (while empty |
136 | (forward-line -1) |
137 | (beginning-of-line) |
138 | (if (bobp) |
139 | (setq empty nil) |
140 | (skip-chars-forward " \t") |
141 | (if (not (or (looking-at "%[^%]") (looking-at "\n"))) |
142 | (setq empty nil)))) |
143 | (if (bobp) |
144 | (setq ind 0) ;Beginning of buffer |
145 | (setq ind (current-column))) ;Beginning of clause |
146 | ;; See its beginning |
147 | (if (looking-at "%%[^%]") |
148 | ind |
149 | ;; Real prolog code |
150 | (if (looking-at "(") |
151 | (setq more t) ;Find open |
152 | (setq more nil)) |
153 | ;; See its tail |
154 | (end-of-prolog-clause) |
155 | (or (bobp) (forward-char -1)) |
156 | (cond ((looking-at "[,(;>]") |
157 | (if (and more (looking-at "[^,]")) |
158 | (+ ind prolog-indent-width) ;More indentation |
159 | (max tab-width ind))) ;Same indentation |
160 | ((looking-at "-") tab-width) ;TAB |
161 | ((or less (looking-at "[^.]")) |
162 | (max (- ind prolog-indent-width) 0)) ;Less indentation |
163 | (t 0)) ;No indentation |
164 | ))) |
165 | ))) |
166 | |
167 | (defun end-of-prolog-clause () |
168 | "Go to end of clause in this line." |
169 | (beginning-of-line 1) |
170 | (let* ((eolpos (save-excursion (end-of-line) (point)))) |
171 | (if (re-search-forward comment-start-skip eolpos 'move) |
172 | (goto-char (match-beginning 0))) |
173 | (skip-chars-backward " \t"))) |
174 | |
175 | (defun prolog-comment-indent () |
176 | "Compute prolog comment indentation." |
177 | (cond ((looking-at "%%%") 0) |
178 | ((looking-at "%%") (prolog-indent-level)) |
179 | (t |
180 | (save-excursion |
181 | (skip-chars-backward " \t") |
182 | ;; Insert one space at least, except at left margin. |
183 | (max (+ (current-column) (if (bolp) 0 1)) |
184 | comment-column))) |
185 | )) |
186 | |
187 | \f |
188 | ;;; |
189 | ;;; Inferior prolog mode |
190 | ;;; |
191 | (defvar inferior-prolog-mode-map nil) |
192 | |
193 | (defun inferior-prolog-mode () |
194 | "Major mode for interacting with an inferior Prolog process. |
195 | |
196 | The following commands are available: |
197 | \\{inferior-prolog-mode-map} |
198 | |
199 | Entry to this mode calls the value of prolog-mode-hook with no arguments, |
200 | if that value is non-nil. Likewise with the value of comint-mode-hook. |
201 | prolog-mode-hook is called after comint-mode-hook. |
202 | |
203 | You can send text to the inferior Prolog from other buffers |
204 | using the commands send-region, send-string and \\[prolog-consult-region]. |
205 | |
206 | Commands: |
207 | Tab indents for Prolog; with argument, shifts rest |
208 | of expression rigidly with the current line. |
209 | Paragraphs are separated only by blank lines and '%%'. '%'s start comments. |
210 | |
211 | Return at end of buffer sends line as input. |
212 | Return not at end copies rest of line to end and sends it. |
213 | \\[comint-kill-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing. |
214 | \\[comint-interrupt-subjob] interrupts the shell or its current subjob if any. |
215 | \\[comint-stop-subjob] stops. \\[comint-quit-subjob] sends quit signal." |
216 | (interactive) |
217 | (require 'comint) |
218 | (comint-mode) |
219 | (setq major-mode 'inferior-prolog-mode |
220 | mode-name "Inferior Prolog" |
221 | comint-prompt-regexp "^| [ ?][- ] *") |
222 | (prolog-mode-variables) |
223 | (if inferior-prolog-mode-map nil |
224 | (setq inferior-prolog-mode-map (copy-keymap comint-mode-map)) |
225 | (prolog-mode-commands inferior-prolog-mode-map)) |
226 | (use-local-map inferior-prolog-mode-map) |
227 | (run-hooks 'prolog-mode-hook)) |
228 | |
229 | (defun run-prolog () |
230 | "Run an inferior Prolog process, input and output via buffer *prolog*." |
231 | (interactive) |
232 | (require 'comint) |
233 | (switch-to-buffer (make-comint "prolog" prolog-program-name)) |
234 | (inferior-prolog-mode)) |
235 | |
236 | (defun prolog-consult-region (compile beg end) |
237 | "Send the region to the Prolog process made by M-x run-prolog. |
238 | If COMPILE (prefix arg) is not nil, |
239 | use compile mode rather than consult mode." |
240 | (interactive "P\nr") |
241 | (save-excursion |
242 | (if compile |
243 | (send-string "prolog" prolog-compile-string) |
244 | (send-string "prolog" prolog-consult-string)) |
245 | (send-region "prolog" beg end) |
246 | (send-string "prolog" "\n") ;May be unnecessary |
247 | (if prolog-eof-string |
248 | (send-string "prolog" prolog-eof-string) |
249 | (process-send-eof "prolog")))) ;Send eof to prolog process. |
250 | |
251 | (defun prolog-consult-region-and-go (compile beg end) |
252 | "Send the region to the inferior Prolog, and switch to *prolog* buffer. |
253 | If COMPILE (prefix arg) is not nil, |
254 | use compile mode rather than consult mode." |
255 | (interactive "P\nr") |
256 | (prolog-consult-region compile beg end) |
257 | (switch-to-buffer "*prolog*")) |