umerin@flab.UUCP (10/28/86)
Lots of requests for prolog mode for GNU Emacs I received. Since I couldn't reply to all of them I decided to post it here. Masanobu UMEDA umerin@flab.fujitsu.junet ---------------------------------------------------------------------- ;; Run Prolog under Emacs (GNU Emacs 17.64) ;; Copyright (C) 1986 Masanobu UMEDA (umerin@flab.fujitsu.junet) ;; This file is part of GNU Emacs. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY. No author or distributor ;; accepts responsibility to anyone for the consequences of using it ;; or for whether it serves any particular purpose or works at all, ;; unless he says so in writing. Refer to the GNU Emacs General Public ;; License for full details. ;; Everyone is granted permission to copy, modify and redistribute ;; GNU Emacs, but only under the conditions described in the ;; GNU Emacs General Public License. A copy of this license is ;; supposed to have been given to you along with GNU Emacs so you ;; can know your rights and responsibilities. It should be in a ;; file named COPYING. Among other things, the copyright notice ;; and this notice must be preserved on all copies. (require 'shell) (make-variable-buffer-local 'shell-prompt-pattern) (defvar prolog-mode-syntax-table nil "") (defvar prolog-mode-abbrev-table nil "") (defvar prolog-eof-string "\^D" "End of file string sent to inferior prolog process.") (if (not prolog-mode-syntax-table) (let ((i 0)) (setq prolog-mode-syntax-table (make-syntax-table)) (set-syntax-table prolog-mode-syntax-table) (modify-syntax-entry ?_ "w") (modify-syntax-entry ?\\ "\\") (modify-syntax-entry ?/ ".") (modify-syntax-entry ?* ".") (modify-syntax-entry ?+ ".") (modify-syntax-entry ?- ".") (modify-syntax-entry ?= ".") (modify-syntax-entry ?% "<") (modify-syntax-entry ?< ".") (modify-syntax-entry ?> ".") (modify-syntax-entry ?\' "\"")) ) (define-abbrev-table 'prolog-mode-abbrev-table ()) (defun prolog-mode-variables () (set-syntax-table prolog-mode-syntax-table) (setq local-abbrev-table prolog-mode-abbrev-table) (make-local-variable 'paragraph-start) (setq paragraph-start (concat "^%%\\|^$\\|" page-delimiter)) ;'%%..' (make-local-variable 'paragraph-separate) (setq paragraph-separate paragraph-start) (make-local-variable 'indent-line-function) (setq indent-line-function 'prolog-indent-line) (make-local-variable 'comment-start) (setq comment-start "%") (make-local-variable 'comment-start-skip) (setq comment-start-skip "%+ *") (make-local-variable 'comment-column) (setq comment-column 40) (make-local-variable 'comment-indent-hook) (setq comment-indent-hook 'prolog-comment-indent)) (defun prolog-mode-commands (map) (define-key map "\t" 'prolog-indent-line)) (defvar prolog-mode-map (make-sparse-keymap)) (define-key prolog-mode-map "\e\C-x" 'prolog-consult-region) (prolog-mode-commands prolog-mode-map) (defun prolog-mode () "Major mode for editing Prolog code for Prologs. Commands: Blank lines and '%%...' separate paragraphs. '%'s start comments. \\{prolog-mode-map} Entry to this mode calls the value of prolog-mode-hook if that value is non-nil." (interactive) (kill-all-local-variables) (use-local-map prolog-mode-map) (setq major-mode 'prolog-mode) (setq mode-name "Prolog") (prolog-mode-variables) (run-hooks 'prolog-mode-hook)) (defun prolog-indent-line (&optional whole-exp) "Indent current line as Prolog code. With argument, indent any additional lines of the same clause rigidly along with this one (not yet)." (interactive "p") (let ((indent (prolog-indent-level)) (pos (- (point-max) (point))) beg) (beginning-of-line) (setq beg (point)) (skip-chars-forward " \t") (if (zerop (- indent (current-column))) nil (delete-region beg (point)) (indent-to indent)) (if (> (- (point-max) pos) (point)) (goto-char (- (point-max) pos))) )) (defun prolog-indent-level () "Compute prolog indentation level." (save-excursion (beginning-of-line) (skip-chars-forward " \t") (cond ((looking-at "%%") 0) ;Large comment starts ((looking-at "%") comment-column) ;Small comment starts ((bobp) 0) ;Beginning of buffer (t (let ((empty t) ind more less) (if (looking-at ")") (setq less t) ;Find close (setq less nil)) ;; See previous indentation (while empty (forward-line -1) (beginning-of-line) (if (bobp) (setq empty nil)) (skip-chars-forward " \t") (if (not (or (looking-at "%") (looking-at "\n"))) (setq empty nil))) (setq ind (current-column)) ;Beginning of clause ;; See its beginning (if (looking-at "(") (setq more t) ;Find open (setq more nil)) (end-of-prolog-clause) (or (bobp) (forward-char -1)) ;; See its tail (if (looking-at "[,(;>]") (if (and more (looking-at "[^,]")) (+ ind tab-width) ;More indentation (max tab-width ind)) ;Same indentation (if (looking-at "-") tab-width ;TAB (if (or less (looking-at "[^.]")) (max (- ind tab-width) 0) ;Less indentation 0) ;No indentation ) ) )) ))) (defun end-of-prolog-clause () "Go to end of clause in this line." (beginning-of-line 1) (if (null comment-start) (error "No comment syntax defined") (let* ((eolpos (save-excursion (end-of-line) (point)))) (if (re-search-forward comment-start-skip eolpos 'move) (goto-char (match-beginning 0))) (skip-chars-backward " \t") ) ) ) (defun prolog-comment-indent () "Compute prolog comment indentation." (if (looking-at "%%") 0 (save-excursion (skip-chars-backward " \t") (max (1+ (current-column)) ;Insert one space at least comment-column)) ) ) ;;; ;;; Inferior prolog mode ;;; (defvar inferior-prolog-mode-map nil) (if inferior-prolog-mode-map nil (setq inferior-prolog-mode-map (copy-alist shell-mode-map)) (prolog-mode-commands inferior-prolog-mode-map) (define-key inferior-prolog-mode-map "\e\C-x" 'prolog-consult-region)) (defun inferior-prolog-mode () "Major mode for interacting with an inferior Prolog process. The following commands are available: \\{inferior-prolog-mode-map} Entry to this mode calls the value of prolog-mode-hook with no arguments, if that value is non-nil. Likewise with the value of shell-mode-hook. prolog-mode-hook is called after shell-mode-hook. You can send text to the inferior Prolog from other buffers using the commands send-region, send-string and \\[prolog-consult-region]. Commands: Tab indents for Prolog; with argument, shifts rest of expression rigidly with the current line. Paragraphs are separated only by blank lines and '%%'. '%'s start comments. Return at end of buffer sends line as input. Return not at end copies rest of line to end and sends it. \\[shell-send-eof] sends end-of-file as input. \\[kill-shell-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing. \\[interrupt-shell-subjob] interrupts the shell or its current subjob if any. \\[stop-shell-subjob] stops, likewise. \\[quit-shell-subjob] sends quit signal, likewise." (interactive) (kill-all-local-variables) (setq major-mode 'inferior-prolog-mode) (setq mode-name "Inferior Prolog") (setq mode-line-format "--%1*%1*-Emacs: %17b %M %[(%m: %s)%]----%3p--%-") (prolog-mode-variables) (use-local-map inferior-prolog-mode-map) (make-local-variable 'last-input-start) (setq last-input-start (make-marker)) (make-local-variable 'last-input-end) (setq last-input-end (make-marker)) (setq shell-prompt-pattern "^| [ ?][- ] *") ;Set prolog prompt pattern (run-hooks 'shell-mode-hook 'prolog-mode-hook)) (defun run-prolog () "Run an inferior Prolog process, input and output via buffer *prolog*." (interactive) (switch-to-buffer (make-shell "prolog" "prolog")) (inferior-prolog-mode)) (defun prolog-consult-region () "Send the region to the Prolog process made by M-x run-prolog." (interactive) (save-excursion (send-string "prolog" "[-user].\n") ;Reconsult mode (send-region "prolog" (mark) (point)) (send-string "prolog" prolog-eof-string) ;Send eof to prolog process. ) ) (defun prolog-consult-region-and-go () "Send the region to the inferior Prolog, and switch to *prolog* buffer." (interactive) (prolog-consult-region) (switch-to-buffer "*prolog*")) -- ============================================================================= Masanobu UMEDA ...!{kddlab,nttlab,ccut,icot}!titcca!flab!umerin umerin@flab.fujitsu.junet NOTES: Views and conclusions contained in this article are the authors' and should not be interpreted as representing the official opinion or policy of Fujitsu.