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;;; iimage.el --- Inline image minor mode.
;; Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
;; 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., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Iimage is a minor mode that displays images, when image-filename
;; exists in the buffer.
;; http://www.netlaputa.ne.jp/~kose/Emacs/iimage.html
;;
;; Add to your `~/.emacs':
;; (autoload 'iimage-mode "iimage" "Support Inline image minor mode." t)
;; (autoload 'turn-on-iimage-mode "iimage" "Turn on 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))
(defgroup iimage nil
"Support for inline images."
:version "22.1"
:group 'image)
(defconst iimage-version "1.1")
(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
")
(defvar iimage-mode-image-search-path nil
"*List of directories to search for image files for iimage-mode.")
;;;###autoload
(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))
;; Emacs21.3 or earlier does not heve locate-file.
(if (fboundp 'locate-file)
(defalias 'iimage-locate-file 'locate-file)
(defun iimage-locate-file (filename path)
(locate-library filename t path)))
(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 (iimage-locate-file file
(cons default-directory
iimage-mode-image-search-path))))
(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)))
;;;###autoload
(define-minor-mode iimage-mode
"Toggle inline image minor mode."
:group 'iimage :lighter " iImg" :keymap iimage-mode-map
(run-hooks 'iimage-mode-hook)
(iimage-mode-buffer iimage-mode))
(provide 'iimage)
;;; arch-tag: f6f8e29a-08f6-4a12-9496-51e67441ce65
;;; iimage.el ends here
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