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;;; mime-image.el --- mime-view filter to display images
;; Copyright (C) 1995,1996,1997,1998 MORIOKA Tomohiko
;; Copyright (C) 1996 Dan Rich
;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Dan Rich <drich@morpheus.corp.sgi.com>
;; Maintainer: MORIOKA Tomohiko <morioka@jaist.ac.jp>
;; Created: 1995/12/15
;; Renamed: 1997/2/21 from tm-image.el
;; Keywords: image, picture, X-Face, MIME, multimedia, mail, news
;; This file is part of SEMI (Showy Emacs MIME Interfaces).
;; 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 GNU XEmacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; If you use this program with MULE, please install
;; etl8x16-bitmap.bdf font included in tl package.
;;; Code:
(require 'mime-view)
(require 'alist)
(cond ((featurep 'xemacs)
(require 'images)
(defun-maybe image-inline-p (format)
(or (memq format image-native-formats)
(find-if (function
(lambda (native)
(image-converter-chain format native)
))
image-native-formats)
))
(image-register-netpbm-utilities)
(image-register-converter 'pic 'ppm "pictoppm")
(image-register-converter 'mag 'ppm "magtoppm")
(defun bitmap-insert-xbm-file (file)
(let ((gl (make-glyph (list (cons 'x file))))
(e (make-extent (point) (point)))
)
(set-extent-end-glyph e gl)
))
;;
;; X-Face
;;
(autoload 'highlight-headers "highlight-headers")
(defun mime-preview-x-face-function-use-highlight-headers ()
(highlight-headers (point-min) (re-search-forward "^$" nil t) t)
)
(add-hook 'mime-display-header-hook
'mime-preview-x-face-function-use-highlight-headers)
)
((featurep 'mule)
;; for MULE 2.* or mule merged EMACS
(require 'x-face-mule)
(defvar image-native-formats '(xbm))
(defun-maybe image-inline-p (format)
(memq format image-native-formats)
)
(defun-maybe image-normalize (format data)
(and (eq format 'xbm)
(vector 'xbm ':data data)
))
;;
;; X-Face
;;
(if (exec-installed-p uncompface-program exec-path)
(add-hook 'mime-display-header-hook
'x-face-decode-message-header)
)
))
(or (fboundp 'image-invalid-glyph-p)
(defsubst image-invalid-glyph-p (glyph)
(or (null (aref glyph 0))
(null (aref glyph 2))
(equal (aref glyph 2) "")
))
)
(mapcar (function
(lambda (rule)
(let ((type (car rule))
(subtype (nth 1 rule))
(format (nth 2 rule)))
(if (image-inline-p format)
(ctree-set-calist-strictly
'mime-preview-condition
(list (cons 'type type)(cons 'subtype subtype)
'(body . visible)
(cons 'body-presentation-method #'mime-display-image)
(cons 'image-format format))
)))))
'((image jpeg jpeg)
(image gif gif)
(image tiff tiff)
(image x-tiff tiff)
(image xbm xbm)
(image x-xbm xbm)
(image x-xpixmap xpm)
(image x-pic pic)
(image x-mag mag)
(image png png)
))
;;; @ content filter for images
;;;
;; (for XEmacs 19.12 or later)
(defun mime-display-image (entity situation)
(message "Decoding image...")
(let ((gl (image-normalize (cdr (assq 'image-format situation))
(mime-entity-content entity))))
(cond ((image-invalid-glyph-p gl)
(setq gl nil)
(message "Invalid glyph!")
)
((eq (aref gl 0) 'xbm)
(let ((xbm-file
(make-temp-name
(expand-file-name "tm" temporary-file-directory))))
(with-temp-buffer
(insert (aref gl 2))
(write-region (point-min)(point-max) xbm-file)
)
(message "Decoding image...")
(bitmap-insert-xbm-file xbm-file)
(delete-file xbm-file)
)
(message "Decoding image... done")
)
(t
(setq gl (make-glyph gl))
(let ((e (make-extent (point) (point))))
(set-extent-end-glyph e gl)
)
(message "Decoding image... done")
))
)
(insert "\n")
)
;;; @ end
;;;
(provide 'mime-image)
;;; mime-image.el ends here
|
