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+;;; iimage.el --- Inline image minor mode.
+
+;; Copyright (C) 2004 Free Software Foundation
+
+;; Author: KOSEKI Yoshinori <kose@meadowy.org>
+;; Maintainer: KOSEKI Yoshinori <kose@meadowy.org>
+;; Keywords: multimedia
+
+;; 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:
+
+;; Iimage is a minor mode that display a images, when image-filename
+;; exists in buffer.
+;; http://www.netlaputa.ne.jp/~kose/Emacs/iimage.html
+;;
+;; Add to your `~/.emacs':
+;; (autoload 'iimage-mode "iimage" "SUpport Inline image minor mode." t)
+;;
+;; ** Display images in *Info* buffer.
+;;
+;; (add-hook 'info-mode-hook 'turn-on-iimage-mode)
+;;
+;; .texinfo:   @file{file://foo.png}
+;; .info:      `file://foo.png'
+;;
+;; ** Display images in Wiki buffer.
+;;
+;; (add-hook 'wiki-mode-hook 'turn-on-iimage-mode)
+;;
+;; wiki-file:   [[foo.png]]
+
+;;; Code:
+
+(eval-when-compile
+  (require 'image-file))
+
+(defconst iimage-version "1.0")
+(defvar iimage-mode nil)
+(defvar iimage-mode-map nil)
+
+;; Set up key map.
+(unless iimage-mode-map
+  (setq iimage-mode-map (make-sparse-keymap))
+  (define-key iimage-mode-map "\C-l" 'iimage-recenter))
+
+(defun iimage-recenter (&optional arg)
+"Re-draw images and recenter."
+  (interactive "P")
+  (iimage-mode-buffer 0)
+  (iimage-mode-buffer 1)
+  (recenter arg))
+
+(defvar iimage-mode-image-filename-regex
+  (concat "[-+./_0-9a-zA-Z]+\\."
+	  (regexp-opt (nconc (mapcar #'upcase
+				     image-file-name-extensions)
+			     image-file-name-extensions)
+		      t)))
+
+(defvar iimage-mode-image-regex-alist
+  `((,(concat "\\(`?file://\\|\\[\\[\\|<\\|`\\)?"
+	      "\\(" iimage-mode-image-filename-regex "\\)"
+	      "\\(\\]\\]\\|>\\|'\\)?") . 2))
+"*Alist of filename REGEXP vs NUM.
+Each element looks like (REGEXP . NUM).
+NUM specifies which parenthesized expression in the regexp.
+
+image filename regex exsamples:
+    file://foo.png
+    `file://foo.png'
+    \\[\\[foo.gif]]
+    <foo.png>
+     foo.JPG
+")
+
+(defun turn-on-iimage-mode ()
+"Unconditionally turn on iimage mode."
+  (interactive)
+  (iimage-mode 1))
+
+(defun turn-off-iimage-mode ()
+"Unconditionally turn off iimage mode."
+  (interactive)
+  (iimage-mode 0))
+
+(defun iimage-mode-buffer (arg)
+"Display/Undisplay Images.
+With numeric ARG, display the images if and only if ARG is positive."
+  (interactive)
+  (let ((ing (if (numberp arg)
+		 (> arg 0)
+	       iimage-mode))
+	(modp (buffer-modified-p (current-buffer)))
+	file buffer-read-only)
+    (save-excursion
+      (goto-char (point-min))
+      (dolist (pair iimage-mode-image-regex-alist)
+	(while (re-search-forward (car pair) nil t)
+	  (if (and (setq file (match-string (cdr pair)))
+		   (setq file (expand-file-name file default-directory))
+		   (file-exists-p file))
+	      (if ing
+		  (add-text-properties (match-beginning 0) (match-end 0)
+				       (list 'display (create-image file)))
+		(remove-text-properties (match-beginning 0) (match-end 0)
+					'(display)))))))
+    (set-buffer-modified-p modp)))
+
+(define-minor-mode iimage-mode
+  "Toggle inline image minor mode."
+  nil " iImg" iimage-mode-map
+  (run-hooks 'iimage-mode-hook)
+  (iimage-mode-buffer iimage-mode))
+
+(provide 'iimage)
+
+;;; iimage.el ends here