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1.1 root 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 ([email protected])
4:
5: ;; This file is part of GNU Emacs.
6:
7: ;; GNU Emacs is distributed in the hope that it will be useful,
8: ;; but WITHOUT ANY WARRANTY. No author or distributor
9: ;; accepts responsibility to anyone for the consequences of using it
10: ;; or for whether it serves any particular purpose or works at all,
11: ;; unless he says so in writing. Refer to the GNU Emacs General Public
12: ;; License for full details.
13:
14: ;; Everyone is granted permission to copy, modify and redistribute
15: ;; GNU Emacs, but only under the conditions described in the
16: ;; GNU Emacs General Public License. A copy of this license is
17: ;; supposed to have been given to you along with GNU Emacs so you
18: ;; can know your rights and responsibilities. It should be in a
19: ;; file named COPYING. Among other things, the copyright notice
20: ;; and this notice must be preserved on all copies.
21:
22: (defvar prolog-mode-syntax-table nil)
23: (defvar prolog-mode-abbrev-table nil)
24: (defvar prolog-mode-map nil)
25:
26: (defvar prolog-consult-string "reconsult(user).\n"
27: "*(Re)Consult mode (for C-Prolog and Quintus Prolog). ")
28:
29: (defvar prolog-compile-string "compile(user).\n"
30: "*Compile mode (for Quintus Prolog).")
31:
32: (defvar prolog-eof-string "end_of_file.\n"
33: "*String that represents end of file for prolog.
34: nil means send actual operaing system end of file.")
35:
36: (defvar prolog-indent-width 4)
37:
38: (if prolog-mode-syntax-table
39: ()
40: (let ((table (make-syntax-table)))
41: (modify-syntax-entry ?_ "w" table)
42: (modify-syntax-entry ?\\ "\\" table)
43: (modify-syntax-entry ?/ "." 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: (setq prolog-mode-syntax-table table)))
53:
54: (define-abbrev-table 'prolog-mode-abbrev-table ())
55:
56: (defun prolog-mode-variables ()
57: (set-syntax-table prolog-mode-syntax-table)
58: (setq local-abbrev-table prolog-mode-abbrev-table)
59: (make-local-variable 'paragraph-start)
60: (setq paragraph-start (concat "^%%\\|^$\\|" page-delimiter)) ;'%%..'
61: (make-local-variable 'paragraph-separate)
62: (setq paragraph-separate paragraph-start)
63: (make-local-variable 'paragraph-ignore-fill-prefix)
64: (setq paragraph-ignore-fill-prefix t)
65: (make-local-variable 'indent-line-function)
66: (setq indent-line-function 'prolog-indent-line)
67: (make-local-variable 'comment-start)
68: (setq comment-start "%")
69: (make-local-variable 'comment-start-skip)
70: (setq comment-start-skip "%+ *")
71: (make-local-variable 'comment-column)
72: (setq comment-column 48)
73: (make-local-variable 'comment-indent-hook)
74: (setq comment-indent-hook 'prolog-comment-indent))
75:
76: (defun prolog-mode-commands (map)
77: (define-key map "\t" 'prolog-indent-line)
78: (define-key map "\e\C-x" 'prolog-consult-region))
79:
80: (if prolog-mode-map
81: nil
82: (setq prolog-mode-map (make-sparse-keymap))
83: (prolog-mode-commands prolog-mode-map))
84:
85: (defun prolog-mode ()
86: "Major mode for editing Prolog code for Prologs.
87: Blank lines and `%%...' separate paragraphs. `%'s start comments.
88: Commands:
89: \\{prolog-mode-map}
90: Entry to this mode calls the value of prolog-mode-hook
91: if that value is non-nil."
92: (interactive)
93: (kill-all-local-variables)
94: (use-local-map prolog-mode-map)
95: (setq major-mode 'prolog-mode)
96: (setq mode-name "Prolog")
97: (prolog-mode-variables)
98: (run-hooks 'prolog-mode-hook))
99:
100: (defun prolog-indent-line (&optional whole-exp)
101: "Indent current line as Prolog code.
102: With argument, indent any additional lines of the same clause
103: rigidly along with this one (not yet)."
104: (interactive "p")
105: (let ((indent (prolog-indent-level))
106: (pos (- (point-max) (point))) beg)
107: (beginning-of-line)
108: (setq beg (point))
109: (skip-chars-forward " \t")
110: (if (zerop (- indent (current-column)))
111: nil
112: (delete-region beg (point))
113: (indent-to indent))
114: (if (> (- (point-max) pos) (point))
115: (goto-char (- (point-max) pos)))
116: ))
117:
118: (defun prolog-indent-level ()
119: "Compute prolog indentation level."
120: (save-excursion
121: (beginning-of-line)
122: (skip-chars-forward " \t")
123: (cond
124: ((looking-at "%%%") 0) ;Large comment starts
125: ((looking-at "%[^%]") comment-column) ;Small comment starts
126: ((bobp) 0) ;Beginning of buffer
127: (t
128: (let ((empty t) ind more less)
129: (if (looking-at ")")
130: (setq less t) ;Find close
131: (setq less nil))
132: ;; See previous indentation
133: (while empty
134: (forward-line -1)
135: (beginning-of-line)
136: (if (bobp)
137: (setq empty nil)
138: (skip-chars-forward " \t")
139: (if (not (or (looking-at "%[^%]") (looking-at "\n")))
140: (setq empty nil))))
141: (if (bobp)
142: (setq ind 0) ;Beginning of buffer
143: (setq ind (current-column))) ;Beginning of clause
144: ;; See its beginning
145: (if (looking-at "%%[^%]")
146: ind
147: ;; Real prolog code
148: (if (looking-at "(")
149: (setq more t) ;Find open
150: (setq more nil))
151: ;; See its tail
152: (end-of-prolog-clause)
153: (or (bobp) (forward-char -1))
154: (cond ((looking-at "[,(;>]")
155: (if (and more (looking-at "[^,]"))
156: (+ ind prolog-indent-width) ;More indentation
157: (max tab-width ind))) ;Same indentation
158: ((looking-at "-") tab-width) ;TAB
159: ((or less (looking-at "[^.]"))
160: (max (- ind prolog-indent-width) 0)) ;Less indentation
161: (t 0)) ;No indentation
162: )))
163: )))
164:
165: (defun end-of-prolog-clause ()
166: "Go to end of clause in this line."
167: (beginning-of-line 1)
168: (let* ((eolpos (save-excursion (end-of-line) (point))))
169: (if (re-search-forward comment-start-skip eolpos 'move)
170: (goto-char (match-beginning 0)))
171: (skip-chars-backward " \t")))
172:
173: (defun prolog-comment-indent ()
174: "Compute prolog comment indentation."
175: (cond ((looking-at "%%%") 0)
176: ((looking-at "%%") (prolog-indent-level))
177: (t
178: (save-excursion
179: (skip-chars-backward " \t")
180: (max (1+ (current-column)) ;Insert one space at least
181: comment-column)))
182: ))
183:
184:
185: ;;;
186: ;;; Inferior prolog mode
187: ;;;
188: (defvar inferior-prolog-mode-map nil)
189:
190: ;; Moved into inferior-prolog-mode
191: ;;(if inferior-prolog-mode-map
192: ;; nil
193: ;; (setq inferior-prolog-mode-map (copy-alist shell-mode-map))
194: ;; (prolog-mode-commands inferior-prolog-mode-map))
195:
196: (defun inferior-prolog-mode ()
197: "Major mode for interacting with an inferior Prolog process.
198:
199: The following commands are available:
200: \\{inferior-prolog-mode-map}
201:
202: Entry to this mode calls the value of prolog-mode-hook with no arguments,
203: if that value is non-nil. Likewise with the value of shell-mode-hook.
204: prolog-mode-hook is called after shell-mode-hook.
205:
206: You can send text to the inferior Prolog from other buffers
207: using the commands send-region, send-string and \\[prolog-consult-region].
208:
209: Commands:
210: Tab indents for Prolog; with argument, shifts rest
211: of expression rigidly with the current line.
212: Paragraphs are separated only by blank lines and '%%'. '%'s start comments.
213:
214: Return at end of buffer sends line as input.
215: Return not at end copies rest of line to end and sends it.
216: \\[shell-send-eof] sends end-of-file as input.
217: \\[kill-shell-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing.
218: \\[interrupt-shell-subjob] interrupts the shell or its current subjob if any.
219: \\[stop-shell-subjob] stops, likewise. \\[quit-shell-subjob] sends quit signal, likewise."
220: (interactive)
221: (kill-all-local-variables)
222: (setq major-mode 'inferior-prolog-mode)
223: (setq mode-name "Inferior Prolog")
224: (setq mode-line-process '(": %s"))
225: (prolog-mode-variables)
226: (require 'shell)
227: (if inferior-prolog-mode-map
228: nil
229: (setq inferior-prolog-mode-map (copy-alist shell-mode-map))
230: (prolog-mode-commands inferior-prolog-mode-map))
231: (use-local-map inferior-prolog-mode-map)
232: (make-local-variable 'last-input-start)
233: (setq last-input-start (make-marker))
234: (make-local-variable 'last-input-end)
235: (setq last-input-end (make-marker))
236: (make-variable-buffer-local 'shell-prompt-pattern)
237: (setq shell-prompt-pattern "^| [ ?][- ] *") ;Set prolog prompt pattern
238: (run-hooks 'shell-mode-hook 'prolog-mode-hook))
239:
240: (defun run-prolog ()
241: "Run an inferior Prolog process, input and output via buffer *prolog*."
242: (interactive)
243: (require 'shell)
244: (switch-to-buffer (make-shell "prolog" "prolog"))
245: (inferior-prolog-mode))
246:
247: (defun prolog-consult-region (compile beg end)
248: "Send the region to the Prolog process made by M-x run-prolog.
249: If COMPILE (prefix arg) is not nil,
250: use compile mode rather than consult mode."
251: (interactive "P\nr")
252: (save-excursion
253: (if compile
254: (send-string "prolog" prolog-compile-string)
255: (send-string "prolog" prolog-consult-string))
256: (send-region "prolog" beg end)
257: (send-string "prolog" "\n") ;May be unnecessary
258: (if prolog-eof-string
259: (send-string "prolog" prolog-eof-string)
260: (process-send-eof "prolog")))) ;Send eof to prolog process.
261:
262: (defun prolog-consult-region-and-go (compile beg end)
263: "Send the region to the inferior Prolog, and switch to *prolog* buffer.
264: If COMPILE (prefix arg) is not nil,
265: use compile mode rather than consult mode."
266: (interactive "P\nr")
267: (prolog-consult-region compile beg end)
268: (switch-to-buffer "*prolog*"))
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