;;; prolog.el --- major mode for editing and running Prolog under Emacs
-;; Copyright (C) 1986, 1987, 2001, 2002, 2003, 2004, 2005
-;; Free Software Foundation, Inc.
+;; Copyright (C) 1986, 1987, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+;; 2008, 2009 Free Software Foundation, Inc.
;; Author: Masanobu UMEDA <umerin@mse.kyutech.ac.jp>
;; Keywords: languages
;; This file is part of GNU Emacs.
-;; GNU Emacs is free software; you can redistribute it and/or modify
+;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(defvar comint-prompt-regexp)
-
+(defvar comint-process-echoes)
(defgroup prolog nil
"Major mode for editing and running Prolog under Emacs."
+ :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
:group 'languages)
(defcustom prolog-program-name
- (let ((names '("prolog" "gprolog")))
+ (let ((names '("prolog" "gprolog" "swipl")))
(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'."
+ "Program name for invoking an inferior Prolog with `run-prolog'."
:type 'string
:group 'prolog)
(defcustom prolog-consult-string "reconsult(user).\n"
- "*(Re)Consult mode (for C-Prolog and Quintus Prolog). "
+ "(Re)Consult mode (for C-Prolog and Quintus Prolog). "
:type 'string
:group 'prolog)
(defcustom prolog-compile-string "compile(user).\n"
- "*Compile mode (for Quintus Prolog)."
+ "Compile mode (for Quintus Prolog)."
:type 'string
:group 'prolog)
(defcustom prolog-eof-string "end_of_file.\n"
- "*String that represents end of file for Prolog.
+ "String that represents end of file for Prolog.
When nil, send actual operating system end of file."
:type 'string
:group 'prolog)
(defvar prolog-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "\e\C-x" 'prolog-consult-region)
+ (define-key map "\C-c\C-l" 'inferior-prolog-load-file)
+ (define-key map "\C-c\C-z" 'switch-to-prolog)
map))
+
+(easy-menu-define prolog-mode-menu prolog-mode-map "Menu for Prolog mode."
+ ;; Mostly copied from scheme-mode's menu.
+ ;; Not tremendously useful, but it's a start.
+ '("Prolog"
+ ["Indent line" indent-according-to-mode t]
+ ["Indent region" indent-region t]
+ ["Comment region" comment-region t]
+ ["Uncomment region" uncomment-region t]
+ "--"
+ ["Run interactive Prolog session" run-prolog t]
+ ))
;;;###autoload
(defun prolog-mode ()
(setq major-mode 'prolog-mode)
(setq mode-name "Prolog")
(prolog-mode-variables)
+ (set (make-local-variable 'comment-add) 1)
;; 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)
+(defun prolog-indent-line ()
"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)
+ (pos (- (point-max) (point))))
(beginning-of-line)
- (setq beg (point))
- (skip-chars-forward " \t")
- (if (zerop (- indent (current-column)))
- nil
- (delete-region beg (point))
- (indent-to indent))
+ (indent-line-to indent)
(if (> (- (point-max) pos) (point))
- (goto-char (- (point-max) pos)))
- ))
+ (goto-char (- (point-max) pos)))))
(defun prolog-indent-level ()
"Compute Prolog indentation level."
(let ((map (make-sparse-keymap)))
;; This map will inherit from `comint-mode-map' when entering
;; inferior-prolog-mode.
+ (define-key map [remap self-insert-command]
+ 'inferior-prolog-self-insert-command)
map))
(defvar inferior-prolog-mode-syntax-table prolog-mode-syntax-table)
(defvar inferior-prolog-mode-abbrev-table prolog-mode-abbrev-table)
+(defvar inferior-prolog-error-regexp-alist
+ ;; GNU Prolog used to not follow the GNU standard format.
+ '(("^\\(.*?\\):\\([0-9]+\\) error: .*(char:\\([0-9]+\\)" 1 2 3)
+ gnu))
+
+(declare-function comint-mode "comint")
+(declare-function comint-send-string "comint" (process string))
+(declare-function comint-send-region "comint" (process start end))
+(declare-function comint-send-eof "comint" ())
+(defvar compilation-error-regexp-alist)
+
(define-derived-mode inferior-prolog-mode comint-mode "Inferior Prolog"
"Major mode for interacting with an inferior Prolog process.
\\[comint-interrupt-subjob] interrupts the shell or its current subjob if any.
\\[comint-stop-subjob] stops. \\[comint-quit-subjob] sends quit signal."
(setq comint-prompt-regexp "^| [ ?][- ] *")
+ (set (make-local-variable 'compilation-error-regexp-alist)
+ inferior-prolog-error-regexp-alist)
+ (compilation-shell-minor-mode)
(prolog-mode-variables))
+(defvar inferior-prolog-buffer nil)
+
+(defvar inferior-prolog-flavor 'unknown
+ "Either a symbol or a buffer position offset by one.
+If a buffer position, the flavor has not been determined yet and
+it is expected that the process's output has been or will
+be inserted at that position plus one.")
+
+(defun inferior-prolog-run (&optional name)
+ (with-current-buffer (make-comint "prolog" (or name prolog-program-name))
+ (inferior-prolog-mode)
+ (setq-default inferior-prolog-buffer (current-buffer))
+ (make-local-variable 'inferior-prolog-buffer)
+ (when (and name (not (equal name prolog-program-name)))
+ (set (make-local-variable 'prolog-program-name) name))
+ (set (make-local-variable 'inferior-prolog-flavor)
+ ;; Force re-detection.
+ (let* ((proc (get-buffer-process (current-buffer)))
+ (pmark (and proc (marker-position (process-mark proc)))))
+ (cond
+ ((null pmark) (1- (point-min)))
+ ;; The use of insert-before-markers in comint.el together with
+ ;; the potential use of comint-truncate-buffer in the output
+ ;; filter, means that it's difficult to reliably keep track of
+ ;; the buffer position where the process's output started.
+ ;; If possible we use a marker at "start - 1", so that
+ ;; insert-before-marker at `start' won't shift it. And if not,
+ ;; we fall back on using a plain integer.
+ ((> pmark (point-min)) (copy-marker (1- pmark)))
+ (t (1- pmark)))))
+ (add-hook 'comint-output-filter-functions
+ 'inferior-prolog-guess-flavor nil t)))
+
+(defun inferior-prolog-process (&optional dontstart)
+ (or (and (buffer-live-p inferior-prolog-buffer)
+ (get-buffer-process inferior-prolog-buffer))
+ (unless dontstart
+ (inferior-prolog-run)
+ ;; Try again.
+ (inferior-prolog-process))))
+
+(defun inferior-prolog-guess-flavor (&optional ignored)
+ (save-excursion
+ (goto-char (1+ inferior-prolog-flavor))
+ (setq inferior-prolog-flavor
+ (cond
+ ((looking-at "GNU Prolog") 'gnu)
+ ((looking-at "Welcome to SWI-Prolog") 'swi)
+ ((looking-at ".*\n") 'unknown) ;There's at least one line.
+ (t inferior-prolog-flavor))))
+ (when (symbolp inferior-prolog-flavor)
+ (remove-hook 'comint-output-filter-functions
+ 'inferior-prolog-guess-flavor t)
+ (if (eq inferior-prolog-flavor 'gnu)
+ (set (make-local-variable 'comint-process-echoes) t))))
+
+;;;###autoload
+(defalias 'run-prolog 'switch-to-prolog)
;;;###autoload
-(defun run-prolog ()
- "Run an inferior Prolog process, input and output via buffer *prolog*."
+(defun switch-to-prolog (&optional name)
+ "Run an inferior Prolog process, input and output via buffer *prolog*.
+With prefix argument \\[universal-prefix], prompt for the program to use."
+ (interactive
+ (list (when current-prefix-arg
+ (let ((proc (inferior-prolog-process 'dontstart)))
+ (if proc
+ (if (yes-or-no-p "Kill current process before starting new one? ")
+ (kill-process proc)
+ (error "Abort")))
+ (read-string "Run Prolog: " prolog-program-name)))))
+ (unless (inferior-prolog-process 'dontstart)
+ (inferior-prolog-run name))
+ (pop-to-buffer inferior-prolog-buffer))
+
+(defun inferior-prolog-self-insert-command ()
+ "Insert the char in the buffer or pass it directly to the process."
(interactive)
- (require 'comint)
- (pop-to-buffer (make-comint "prolog" prolog-program-name))
- (inferior-prolog-mode))
+ (let* ((proc (get-buffer-process (current-buffer)))
+ (pmark (and proc (marker-position (process-mark proc)))))
+ (if (and (eq inferior-prolog-flavor 'gnu)
+ pmark
+ (null current-prefix-arg)
+ (eobp)
+ (eq (point) pmark)
+ (save-excursion
+ (goto-char (- pmark 3))
+ (looking-at " \\? ")))
+ ;; This is GNU prolog waiting to know whether you want more answers
+ ;; or not (or abort, etc...). The answer is a single char, not
+ ;; a line, so pass this char directly rather than wait for RET to
+ ;; send a whole line.
+ (comint-send-string proc (string last-command-event))
+ (call-interactively 'self-insert-command))))
(defun prolog-consult-region (compile beg end)
"Send the region to the Prolog process made by \"M-x run-prolog\".
If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode."
(interactive "P\nr")
- (save-excursion
- (if compile
- (process-send-string "prolog" prolog-compile-string)
- (process-send-string "prolog" prolog-consult-string))
- (process-send-region "prolog" beg end)
- (process-send-string "prolog" "\n") ;May be unnecessary
+ (let ((proc (inferior-prolog-process)))
+ (comint-send-string proc
+ (if compile prolog-compile-string
+ prolog-consult-string))
+ (comint-send-region proc beg end)
+ (comint-send-string proc "\n") ;May be unnecessary
(if prolog-eof-string
- (process-send-string "prolog" prolog-eof-string)
- (process-send-eof "prolog")))) ;Send eof to prolog process.
+ (comint-send-string proc prolog-eof-string)
+ (with-current-buffer (process-buffer proc)
+ (comint-send-eof))))) ;Send eof to prolog process.
(defun prolog-consult-region-and-go (compile beg end)
"Send the region to the inferior Prolog, and switch to *prolog* buffer.
If COMPILE (prefix arg) is not nil, use compile mode rather than consult mode."
(interactive "P\nr")
(prolog-consult-region compile beg end)
- (switch-to-buffer "*prolog*"))
+ (pop-to-buffer inferior-prolog-buffer))
+
+;; inferior-prolog-mode uses the autoloaded compilation-shell-minor-mode.
+(declare-function compilation-forget-errors "compile" ())
+
+(defun inferior-prolog-load-file ()
+ "Pass the current buffer's file to the inferior prolog process."
+ (interactive)
+ (save-buffer)
+ (let ((file buffer-file-name)
+ (proc (inferior-prolog-process)))
+ (with-current-buffer (process-buffer proc)
+ (compilation-forget-errors)
+ (comint-send-string proc (concat "['" (file-relative-name file) "'].\n"))
+ (pop-to-buffer (current-buffer)))))
(provide 'prolog)
-;;; arch-tag: f3ec6748-1272-4ab6-8826-c50cb1607636
+;; arch-tag: f3ec6748-1272-4ab6-8826-c50cb1607636
;;; prolog.el ends here
HCoop / bpt / emacs.git / blobdiff