;;; prolog.el --- major mode for editing and running Prolog under Emacs
-;; Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+;; Copyright (C) 1986, 1987, 2003, 2004 Free Software Foundation, Inc.
;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp>
;; Keywords: languages
;; This package provides a major mode for editing Prolog. It knows
;; about Prolog syntax and comments, and can send regions to an inferior
-;; Prolog interpreter process.
+;; Prolog interpreter process. Font locking is tuned towards GNU Prolog.
;;; Code:
-(defvar prolog-mode-syntax-table nil)
-(defvar prolog-mode-abbrev-table nil)
-(defvar prolog-mode-map nil)
-
(defgroup prolog nil
"Major mode for editing and running Prolog under Emacs"
:group 'languages)
-
-(defcustom prolog-program-name "prolog"
+
+(defcustom prolog-program-name
+ (let ((names '("prolog" "gprolog")))
+ (while (and names
+ (not (executable-find (car names))))
+ (setq names (cdr names)))
+ (or (car names) "prolog"))
"*Program name for invoking an inferior Prolog with `run-prolog'."
:type 'string
:group 'prolog)
:type 'integer
:group 'prolog)
-(if prolog-mode-syntax-table
- ()
+(defvar prolog-font-lock-keywords
+ '(("\\(#[<=]=>\\|:-\\)\\|\\(#=\\)\\|\\(#[#<>\\/][=\\/]*\\|!\\)"
+ 0 font-lock-keyword-face)
+ ("\\<\\(is\\|write\\|nl\\|read_\\sw+\\)\\>"
+ 1 font-lock-keyword-face)
+ ("^\\(\\sw+\\)\\s-*\\((\\(.+\\))\\)*"
+ (1 font-lock-function-name-face)
+ (3 font-lock-variable-name-face)))
+ "Font-lock keywords for Prolog mode.")
+
+(defvar prolog-mode-syntax-table
(let ((table (make-syntax-table)))
(modify-syntax-entry ?_ "w" table)
(modify-syntax-entry ?\\ "\\" table)
- (modify-syntax-entry ?/ "." table)
- (modify-syntax-entry ?* "." table)
+ (modify-syntax-entry ?/ ". 14" table)
+ (modify-syntax-entry ?* ". 23" table)
(modify-syntax-entry ?+ "." table)
(modify-syntax-entry ?- "." table)
(modify-syntax-entry ?= "." table)
(modify-syntax-entry ?< "." table)
(modify-syntax-entry ?> "." table)
(modify-syntax-entry ?\' "\"" table)
- (setq prolog-mode-syntax-table table)))
+ table))
+(defvar prolog-mode-abbrev-table nil)
(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 "%%\\|$\\|" page-delimiter)) ;'%%..'
(make-local-variable 'paragraph-separate)
- (setq paragraph-separate paragraph-start)
+ (setq paragraph-separate (concat "%%\\|$\\|" page-delimiter)) ;'%%..'
(make-local-variable 'paragraph-ignore-fill-prefix)
(setq paragraph-ignore-fill-prefix t)
(make-local-variable 'imenu-generic-expression)
(make-local-variable 'comment-start)
(setq comment-start "%")
(make-local-variable 'comment-start-skip)
- (setq comment-start-skip "%+ *")
+ (setq comment-start-skip "\\(?:%+\\|/\\*+\\)[ \t]*")
+ (make-local-variable 'comment-end-skip)
+ (setq comment-end-skip "[ \t]*\\(\n\\|\\*+/\\)")
(make-local-variable 'comment-column)
- (setq comment-column 48)
- (make-local-variable 'comment-indent-function)
- (setq comment-indent-function 'prolog-comment-indent))
-
-(defun prolog-mode-commands (map)
- (define-key map "\t" 'prolog-indent-line)
- (define-key map "\e\C-x" 'prolog-consult-region))
+ (setq comment-column 48))
-(if prolog-mode-map
- nil
- (setq prolog-mode-map (make-sparse-keymap))
- (prolog-mode-commands prolog-mode-map))
+(defvar prolog-mode-map
+ (let ((map (make-sparse-keymap)))
+ (define-key map "\e\C-x" 'prolog-consult-region)
+ map))
;;;###autoload
(defun prolog-mode ()
(interactive)
(kill-all-local-variables)
(use-local-map prolog-mode-map)
+ (set-syntax-table prolog-mode-syntax-table)
(setq major-mode 'prolog-mode)
(setq mode-name "Prolog")
(prolog-mode-variables)
- (run-hooks 'prolog-mode-hook))
+ ;; font lock
+ (setq font-lock-defaults '(prolog-font-lock-keywords
+ nil nil nil
+ beginning-of-line))
+ (run-mode-hooks 'prolog-mode-hook))
(defun prolog-indent-line (&optional whole-exp)
"Indent current line as Prolog code.
(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."
- (cond ((looking-at "%%%") 0)
- ((looking-at "%%") (prolog-indent-level))
- (t
- (save-excursion
- (skip-chars-backward " \t")
- ;; Insert one space at least, except at left margin.
- (max (+ (current-column) (if (bolp) 0 1))
- comment-column)))
- ))
-
\f
;;;
;;; Inferior prolog mode
;;;
-(defvar inferior-prolog-mode-map nil)
+(defvar inferior-prolog-mode-map
+ (let ((map (make-sparse-keymap)))
+ ;; This map will inherit from `comint-mode-map' when entering
+ ;; inferior-prolog-mode.
+ map))
+
+(defvar inferior-prolog-mode-syntax-table prolog-mode-syntax-table)
+(defvar inferior-prolog-mode-abbrev-table prolog-mode-abbrev-table)
-(defun inferior-prolog-mode ()
+(define-derived-mode inferior-prolog-mode comint-mode "Inferior Prolog"
"Major mode for interacting with an inferior Prolog process.
The following commands are available:
\\[comint-kill-input] and \\[backward-kill-word] are kill commands, imitating normal Unix input editing.
\\[comint-interrupt-subjob] interrupts the shell or its current subjob if any.
\\[comint-stop-subjob] stops. \\[comint-quit-subjob] sends quit signal."
- (interactive)
- (require 'comint)
- (comint-mode)
- (setq major-mode 'inferior-prolog-mode
- mode-name "Inferior Prolog"
- comint-prompt-regexp "^| [ ?][- ] *")
- (prolog-mode-variables)
- (if inferior-prolog-mode-map nil
- (setq inferior-prolog-mode-map (copy-keymap comint-mode-map))
- (prolog-mode-commands inferior-prolog-mode-map))
- (use-local-map inferior-prolog-mode-map)
- (run-hooks 'prolog-mode-hook))
+ (setq comint-prompt-regexp "^| [ ?][- ] *")
+ (prolog-mode-variables))
;;;###autoload
(defun run-prolog ()
"Run an inferior Prolog process, input and output via buffer *prolog*."
(interactive)
(require 'comint)
- (switch-to-buffer (make-comint "prolog" prolog-program-name))
+ (pop-to-buffer (make-comint "prolog" prolog-program-name))
(inferior-prolog-mode))
(defun prolog-consult-region (compile beg end)
(provide 'prolog)
+;;; arch-tag: f3ec6748-1272-4ab6-8826-c50cb1607636
;;; prolog.el ends here