;;; autoconf-mode.el --- autoconf code editing commands for Emacs

;; Author: Martin Buchholz (martin@xemacs.org)
;; Maintainer: Martin Buchholz
;; Keywords: languages, faces, m4, configure

;; This file is part of XEmacs

;; XEmacs 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.

;; XEmacs 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 XEmacs; see the file COPYING.  If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

;;; Synched up with: not in FSF.

;;; Commentary:

;; A major mode for editing autoconf input (like configure.in).
;; Derived from m4-mode.el by Andrew Csillag (drew@staff.prodigy.com)

;;; Code:

;;thank god for make-regexp.el!
(defvar autoconf-font-lock-keywords
  `(("\\bdnl \\(.*\\)"  1 font-lock-comment-face t)
    ("\\$[0-9*#@]" . font-lock-variable-name-face)
    ("\\b\\(m4_\\)?\\(builtin\\|change\\(com\\|quote\\|word\\)\\|d\\(e\\(bug\\(file\\|mode\\)\\|cr\\|f\\(ine\\|n\\)\\)\\|iv\\(ert\\|num\\)\\|nl\\|umpdef\\)\\|e\\(rrprint\\|syscmd\\|val\\)\\|f\\(ile\\|ormat\\)\\|gnu\\|i\\(f\\(def\\|else\\)\\|n\\(c\\(lude\\|r\\)\\|d\\(ex\\|ir\\)\\)\\)\\|l\\(en\\|ine\\)\\|m\\(4\\(exit\\|wrap\\)\\|aketemp\\)\\|p\\(atsubst\\|opdef\\|ushdef\\)\\|regexp\\|s\\(hift\\|include\\|ubstr\\|ys\\(cmd\\|val\\)\\)\\|tra\\(ceo\\(ff\\|n\\)\\|nslit\\)\\|un\\(d\\(efine\\|ivert\\)\\|ix\\)\\)\\b" . font-lock-keyword-face)
    ("^\\(\\(m4_\\)?define\\|A._DEFUN\\)(\\[?\\([A-Za-z0-9_]+\\)" 3 font-lock-function-name-face)
    "default font-lock-keywords")
)

(defvar autoconf-mode-syntax-table nil
  "syntax table used in autoconf mode")
(setq autoconf-mode-syntax-table (make-syntax-table))
(modify-syntax-entry ?\" "\""  autoconf-mode-syntax-table)
;;(modify-syntax-entry ?\' "\""  autoconf-mode-syntax-table)
(modify-syntax-entry ?#  "<\n" autoconf-mode-syntax-table)
(modify-syntax-entry ?\n ">#"  autoconf-mode-syntax-table)
(modify-syntax-entry ?\( "()"   autoconf-mode-syntax-table)
(modify-syntax-entry ?\) ")("   autoconf-mode-syntax-table)
(modify-syntax-entry ?\[ "(]"  autoconf-mode-syntax-table)
(modify-syntax-entry ?\] ")["  autoconf-mode-syntax-table)
(modify-syntax-entry ?*  "."   autoconf-mode-syntax-table)
(modify-syntax-entry ?_  "_"   autoconf-mode-syntax-table)

(defvar autoconf-mode-map
  (let ((map (make-sparse-keymap)))
    (define-key map "\C-c\C-c" 'comment-region)
    map))

;;;###autoload
(defun autoconf-mode ()
  "A major-mode to edit autoconf input files like configure.in
\\{autoconf-mode-map}
"
  (interactive)
  (kill-all-local-variables)
  (use-local-map autoconf-mode-map)

  (make-local-variable 'comment-start)
  (setq comment-start "dnl ")
  (make-local-variable 'parse-sexp-ignore-comments)
  (setq parse-sexp-ignore-comments t)

  (make-local-variable	'font-lock-defaults)  
  (setq major-mode 'autoconf-mode)
  (setq mode-name "Autoconf")
  (setq font-lock-defaults `(autoconf-font-lock-keywords nil))
  (set-syntax-table autoconf-mode-syntax-table)
  (run-hooks 'autoconf-mode-hook))

;;;###autoload
(add-to-list 'auto-mode-alist '("\\.m4\\'" . autoconf-mode))
;;;###autoload
(add-to-list 'auto-mode-alist
             '("configure\\.\\(in\\|ac\\)\\'" . autoconf-mode))

(provide 'autoconf-mode)

;;; autoconf-mode.el ends here
