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)
5 ;; This file is part of GNU Emacs.
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)
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.
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.
21 (defvar prolog-mode-syntax-table nil)
22 (defvar prolog-mode-abbrev-table nil)
23 (defvar prolog-mode-map nil)
25 (defvar prolog-program-name "prolog"
26 "*Program name for invoking an inferior Prolog with `run-prolog'.")
28 (defvar prolog-consult-string "reconsult(user).\n"
29 "*(Re)Consult mode (for C-Prolog and Quintus Prolog). ")
31 (defvar prolog-compile-string "compile(user).\n"
32 "*Compile mode (for Quintus Prolog).")
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.")
38 (defvar prolog-indent-width 4)
40 (if prolog-mode-syntax-table
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)))
56 (define-abbrev-table 'prolog-mode-abbrev-table ())
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))
78 (defun prolog-mode-commands (map)
79 (define-key map "\t" 'prolog-indent-line)
80 (define-key map "\e\C-x" 'prolog-consult-region))
84 (setq prolog-mode-map (make-sparse-keymap))
85 (prolog-mode-commands prolog-mode-map))
88 "Major mode for editing Prolog code for Prologs.
89 Blank lines and `%%...' separate paragraphs. `%'s start comments.
92 Entry to this mode calls the value of prolog-mode-hook
93 if that value is non-nil."
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))
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)."
107 (let ((indent (prolog-indent-level))
108 (pos (- (point-max) (point))) beg)
111 (skip-chars-forward " \t")
112 (if (zerop (- indent (current-column)))
114 (delete-region beg (point))
116 (if (> (- (point-max) pos) (point))
117 (goto-char (- (point-max) pos)))
120 (defun prolog-indent-level ()
121 "Compute prolog indentation level."
124 (skip-chars-forward " \t")
126 ((looking-at "%%%") 0) ;Large comment starts
127 ((looking-at "%[^%]") comment-column) ;Small comment starts
128 ((bobp) 0) ;Beginning of buffer
130 (let ((empty t) ind more less)
132 (setq less t) ;Find close
134 ;; See previous indentation
140 (skip-chars-forward " \t")
141 (if (not (or (looking-at "%[^%]") (looking-at "\n")))
144 (setq ind 0) ;Beginning of buffer
145 (setq ind (current-column))) ;Beginning of clause
147 (if (looking-at "%%[^%]")
151 (setq more t) ;Find open
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
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")))
175 (defun prolog-comment-indent ()
176 "Compute prolog comment indentation."
177 (cond ((looking-at "%%%") 0)
178 ((looking-at "%%") (prolog-indent-level))
181 (skip-chars-backward " \t")
182 ;; Insert one space at least, except at left margin.
183 (max (+ (current-column) (if (bolp) 0 1))
189 ;;; Inferior prolog mode
191 (defvar inferior-prolog-mode-map nil)
193 (defun inferior-prolog-mode ()
194 "Major mode for interacting with an inferior Prolog process.
196 The following commands are available:
197 \\{inferior-prolog-mode-map}
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.
203 You can send text to the inferior Prolog from other buffers
204 using the commands send-region, send-string and \\[prolog-consult-region].
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.
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."
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))
230 "Run an inferior Prolog process, input and output via buffer *prolog*."
233 (switch-to-buffer (make-comint "prolog" prolog-program-name))
234 (inferior-prolog-mode))
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."
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.
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."
256 (prolog-consult-region compile beg end)
257 (switch-to-buffer "*prolog*"))