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;; $Revision: 1.1 $

;; Copyright (C) 2000 by Ingo Koch

;; Author: ingo Koch <ingo.koch@ikoch.de>
;; The Idea and a lot of the code is stolen from the 
;; .emacs file of  Jake Donham <jake@bitmechanic.com>
;; available at http://www.jaked.org/emacs.html
;; who did this for the mocha java decompiler
;; Maintainer: Ingo Koch <ingo.koch@ikoch.de>
;; Keywords: java, tools

;; This program 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.

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

;;; Description:

;; This package is an add-on to the Java Development Environment
;; (JDE) for Emacs. It automatically decompiles a class file and 
;; offers you a buffer to view or edit it.
;; javadecomp (currently) relies on the jad java decompiler to
;; do the actual work, but it should be possible to extend it to
;; whatever you like (sugestions are welcome).
;; jad is available at the Jad home page: 
;; http://www.geocities.com/SiliconValley/Bridge/8617/jad.html
;; by Pavel Kouznetsov (kpdus@yahoo.com).
;; It supports a wide range of OS like:
;; - Windows 95/NT on Intel platform 
;; - Linux on Intel platform 
;; - Solaris 7.0 on Intel platform
;; - Rhapsody 5.3 on PowerPC platform 
;; - AIX 4.2 on IBM RS/6000 platform 
;; - OS/2 
;; - Solaris 2.5 on SUN Sparc platform
;; - FreeBSD 2.2.x

;;; Installation:

;; Put the following in your .emacs file:
;;   (require 'javadecomp)
;;
;;; Usage:
;; Open a class file and feel happy.

;;; Support:

;; Any comments, suggestions, bug reports or upgrade requests are welcome.
;; Please send them to Ingo Koch at ingo.koch@ikoch.de.
;;

;;; Code:

(defvar jdc-command  "jad"
  "The name of the decompiler if it's on your path, otherwise
a full qualified path to it.")

(defvar jdc-parameter  " -space -t2 "
  "Extra parameter which should be added to the call of the decompiler.")

(defvar jdc-extension  "jad"
  "The extension which is used for the generated java files.")

(defun jdc-find-file ()
  "Find a classfile and decompile it, opening the decompiled file instead."
  (interactive)
  (let ((jdc-classfile (read-file-name ".class file: ")))
    (find-file jdc-classfile)
    (jdc-buffer)
    (jde-mode)))

(defun jdc-buffer ()
  "Construct the command for decompiling a class file, call the resulting
command and load the decompiled file."
  (let*
      (
       (jdc-classfile (file-name-nondirectory (buffer-file-name)))
       (jdc-javafile (concat (substring jdc-classfile 0 -5) jdc-extension))
       (command (concat jdc-command jdc-parameter jdc-classfile)))

    (shell-command command)
    (find-alternate-file jdc-javafile)))

;; a hook to be able to automatically decompile-find-file .class files 
(add-hook
 'find-file-hooks
 (lambda () 
   (let ((file (buffer-file-name)))
     (cond ((string= (substring file -6) ".class")
	    (progn (jdc-buffer) (jde-mode)))))))
(provide 'javadecomp)