mirror/emacs
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-12-20 10:23:57 +00:00
Code Issues Releases Activity
1793ac759f
emacs/lisp/progmodes/prolog.el

292 lines
9.7 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; prolog.el --- major mode for editing and running Prolog under Emacs
;; Copyright (C) 1986, 1987, 2001, 2002, 2003, 2004, 2005
;; 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
;; 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, 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 comint-prompt-regexp)
(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")))
(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)
(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.
When nil, 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.")
(defvar 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)
table))
(defvar prolog-mode-abbrev-table nil)
(define-abbrev-table 'prolog-mode-abbrev-table ())
(defun prolog-mode-variables ()
(make-local-variable 'paragraph-separate)
(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)
(setq imenu-generic-expression '((nil "^\\sw+" 0)))
(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 "\\(?:%+\\|/\\*+\\)[ \t]*")
(make-local-variable 'comment-end-skip)
(setq comment-end-skip "[ \t]*\\(\n\\|\\*+/\\)")
(make-local-variable 'comment-column)
(setq comment-column 48))
(defvar prolog-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "\e\C-x" 'prolog-consult-region)
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)
(set-syntax-table prolog-mode-syntax-table)
(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-mode-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")))
;;;
;;; Inferior prolog mode
;;;
(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)
(define-derived-mode inferior-prolog-mode comint-mode "Inferior Prolog"
"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
`process-send-region', `process-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."
(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)
(pop-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
(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
(if prolog-eof-string
(process-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
Reference in New Issue View Git Blame Copy Permalink