[Emacs-diffs] Changes to emacs/lisp/progmodes/prolog.el [lexbind]

[Miles Bader]

Index: emacs/lisp/progmodes/prolog.el
diff -c /dev/null emacs/lisp/progmodes/prolog.el:1.17.2.1
*** /dev/null   Tue Oct 14 19:30:31 2003
--- emacs/lisp/progmodes/prolog.el      Tue Oct 14 19:30:18 2003
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*** 0 ****
--- 1,308 ----
+ ;;; prolog.el --- major mode for editing and running Prolog under Emacs
+ 
+ ;; Copyright (C) 1986, 1987 Free Software Foundation, Inc.
+ 
+ ;; Author: Masanobu UMEDA <address@hidden>
+ ;; Keywords: languages
+ 
+ ;; This file is part of GNU Emacs.
+ 
+ ;; 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.
+ 
+ ;; GNU Emacs is distributed in the hope that it will be useful,
+ ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+ ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ ;; 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., 59 Temple Place - Suite 330,
+ ;; Boston, MA 02111-1307, USA.
+ 
+ ;;; Commentary:
+ 
+ ;; 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.  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"
+   "*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). "
+   :type 'string
+   :group 'prolog)
+ 
+ (defcustom prolog-compile-string "compile(user).\n"
+   "*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.
+ nil means send actual operating system end of file."
+   :type 'string
+   :group 'prolog)
+ 
+ (defcustom prolog-indent-width 4
+   "Level of indentation in Prolog buffers."
+   :type 'integer
+   :group 'prolog)
+ 
+ (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.")
+ 
+ (if prolog-mode-syntax-table
+     ()
+   (let ((table (make-syntax-table)))
+     (modify-syntax-entry ?_ "w" 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 ?\n ">" table)
+     (modify-syntax-entry ?< "." table)
+     (modify-syntax-entry ?> "." table)
+     (modify-syntax-entry ?\' "\"" table)
+     (setq prolog-mode-syntax-table table)))
+ 
+ (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 'paragraph-ignore-fill-prefix)
+   (setq paragraph-ignore-fill-prefix t)
+   (make-local-variable 'imenu-generic-expression)
+   (setq imenu-generic-expression "^[a-z][a-zA-Z0-9_]+")
+   (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 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))
+ 
+ (if prolog-mode-map
+     nil
+   (setq prolog-mode-map (make-sparse-keymap))
+   (prolog-mode-commands prolog-mode-map))
+ 
+ ;;;###autoload
+ (defun prolog-mode ()
+   "Major mode for editing Prolog code for Prologs.
+ Blank lines and `%%...' separate paragraphs.  `%'s start comments.
+ Commands:
+ \\{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)
+   ;; font lock
+   (setq font-lock-defaults '(prolog-font-lock-keywords
+                              nil nil nil
+                              beginning-of-line))
+   (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))))
+       (if (bobp)
+           (setq ind 0)                ;Beginning of buffer
+         (setq ind (current-column)))  ;Beginning of clause
+       ;; See its beginning
+       (if (looking-at "%%[^%]")
+           ind
+         ;; Real prolog code
+         (if (looking-at "(")
+             (setq more t)             ;Find open
+           (setq more nil))
+         ;; See its tail
+         (end-of-prolog-clause)
+         (or (bobp) (forward-char -1))
+         (cond ((looking-at "[,(;>]")
+                (if (and more (looking-at "[^,]"))
+                    (+ ind prolog-indent-width) ;More indentation
+                  (max tab-width ind))) ;Same indentation
+               ((looking-at "-") tab-width) ;TAB
+               ((or less (looking-at "[^.]"))
+                (max (- ind prolog-indent-width) 0)) ;Less indentation
+               (t 0))                  ;No indentation
+         )))
+      )))
+ 
+ (defun end-of-prolog-clause ()
+   "Go to end of clause in this line."
+   (beginning-of-line 1)
+   (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."
+   (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)))
+       ))
+ 
+ 
+ ;;;
+ ;;; Inferior prolog mode
+ ;;;
+ (defvar inferior-prolog-mode-map nil)
+ 
+ (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 `comint-mode-hook'.
+ `prolog-mode-hook' is called after `comint-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.
+ \\[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))
+ 
+ ;;;###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))
+   (inferior-prolog-mode))
+ 
+ (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
+       (send-string "prolog" prolog-compile-string)
+       (send-string "prolog" prolog-consult-string))
+     (send-region "prolog" beg end)
+     (send-string "prolog" "\n")               ;May be unnecessary
+     (if prolog-eof-string
+       (send-string "prolog" prolog-eof-string)
+       (process-send-eof "prolog")))) ;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*"))
+ 
+ (provide 'prolog)
+ 
+ ;;; arch-tag: f3ec6748-1272-4ab6-8826-c50cb1607636
+ ;;; prolog.el ends here