1 ;;; gnus-fun.el --- various frivoluos extension functions to Gnus
2 ;; Copyright (C) 2002 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
28 (defcustom gnus-x-face-directory (expand-file-name "x-faces" gnus-directory)
29 "*Directory where X-Face PBM files are stored."
33 (defcustom gnus-convert-pbm-to-x-face-command "pbmtoxbm %s | compface"
34 "Command for converting a PBM to an X-Face."
38 (defcustom gnus-convert-image-to-x-face-command "giftopnm %s | ppmnorm | pnmscale -width 48 -height 48 | ppmtopgm | pgmtopbm | pbmtoxbm | compface"
39 "Command for converting an image to an X-Face.
40 By default it takes a GIF filename and output the X-Face header data
45 (defcustom gnus-convert-image-to-face-command "djpeg %s | ppmnorm | pnmscale -width 48 -height 48 | ppmquant %d | pnmtopng"
46 "Command for converting an image to an Face.
47 By default it takes a JPEG filename and output the Face header data
52 (defun gnus-shell-command-to-string (command)
53 "Like `shell-command-to-string' except not mingling ERROR."
54 (with-output-to-string
55 (call-process shell-file-name nil (list standard-output nil)
56 nil shell-command-switch command)))
58 (defun gnus-shell-command-on-region (start end command)
59 "A simplified `shell-command-on-region'.
60 Output to the current buffer, replace text, and don't mingle error."
61 (call-process-region start end shell-file-name t
62 (list (current-buffer) nil)
63 nil shell-command-switch command))
66 (defun gnus-random-x-face ()
67 "Return X-Face header data chosen randomly from `gnus-x-face-directory'."
69 (when (file-exists-p gnus-x-face-directory)
70 (let* ((files (directory-files gnus-x-face-directory t "\\.pbm$"))
71 (file (nth (random (length files)) files)))
73 (gnus-shell-command-to-string
74 (format gnus-convert-pbm-to-x-face-command
75 (shell-quote-argument file)))))))
78 (defun gnus-insert-random-x-face-header ()
79 "Insert a random X-Face header from `gnus-x-face-directory'."
81 (let ((data (gnus-random-x-face)))
85 (insert "X-Face: " data)
87 "No face returned by `gnus-random-x-face'. Does %s/*.pbm exist?"
88 gnus-x-face-directory)))))
91 (defun gnus-x-face-from-file (file)
92 "Insert an X-Face header based on an image file."
93 (interactive "fImage file name (by default GIF): ")
94 (when (file-exists-p file)
95 (gnus-shell-command-to-string
96 (format gnus-convert-image-to-x-face-command
97 (shell-quote-argument (expand-file-name file))))))
100 (defun gnus-face-from-file (file)
101 "Return an Face header based on an image file."
102 (interactive "fImage file name (by default JPEG): ")
103 (when (file-exists-p file)
108 (while (and (not done)
111 (gnus-shell-command-to-string
112 (format gnus-convert-image-to-face-command
113 (shell-quote-argument (expand-file-name file))
115 (if (> (length attempt) 740)
117 (setq quant (- quant 2))
118 (message "Length %d; trying quant %d"
119 (length attempt) quant))
122 (mm-with-unibyte-buffer
124 (base64-encode-region (point-min) (point-max))
125 (goto-char (point-min))
126 (while (search-forward "\n" nil t)
128 (goto-char (point-min))
129 (while (> (- (point-max) (point))
138 (defun gnus-convert-face-to-png (face)
139 (mm-with-unibyte-buffer
142 (base64-decode-region (point-min) (point-max)))
145 (defun gnus-convert-image-to-gray-x-face (file depth)
146 (let* ((mapfile (mm-make-temp-file (expand-file-name "gnus."
148 (levels (expt 2 depth))
149 (step (/ 255 (1- levels)))
150 color-alist bits bits-list mask pixel x-faces)
151 (with-temp-file mapfile
153 (insert (format "%d 1\n" levels))
156 (insert (format "%d %d %d\n"
157 (* step i) (* step i) (* step i)))
158 (push (cons (* step i) i) color-alist)))
159 (when (file-exists-p file)
161 (insert (gnus-shell-command-to-string
162 (format "giftopnm %s | ppmnorm | pnmscale -width 48 -height 48 | ppmquant -fs -map %s | ppmtopgm | pnmnoraw"
163 (shell-quote-argument file)
165 (goto-char (point-min))
167 (while (setq pixel (ignore-errors (read (current-buffer))))
168 (push (cdr (assq pixel color-alist)) bits-list))
169 (setq bits-list (nreverse bits-list))
170 (dotimes (bit-number depth)
171 (setq mask (expt 2 bit-number))
173 (insert "P1\n48 48\n")
174 (dolist (bits bits-list)
175 (insert (if (zerop (logand bits mask)) "0 " "1 ")))
176 (gnus-shell-command-on-region
177 (point-min) (point-max)
178 ;; the following is taken from xbmtoikon:
179 "pbmtoicon | sed '/^[ ]*[*\\\\/]/d; s/[ ]//g; s/,$//' | tr , '\\012' | sed 's/^0x//; s/^/0x/' | pr -l1 -t -w22 -3 -s, | sed 's/,*$/,/' | compface")
180 (push (buffer-string) x-faces))))
181 (dotimes (i (length x-faces))
182 (insert (if (zerop i) "X-Face:" (format "X-Face-%s:" i))
184 (delete-file mapfile)))
187 (defun gnus-convert-gray-x-face-to-xpm (faces)
188 (let* ((depth (length faces))
189 (scale (/ 255 (1- (expt 2 depth))))
191 (coding-system-for-read 'binary)
192 (coding-system-for-write 'binary)
193 default-enable-multibyte-characters
194 start bit-array bit-arrays pixel)
198 (insert (uncompface face))
199 (gnus-shell-command-on-region
200 (point-min) (point-max)
202 (goto-char (point-min))
211 (setq bit-array (read (current-buffer)))
212 (unless (= (length bit-array) (* 48 48))
214 (push bit-array bit-arrays))
217 (insert "P2\n48 48\n255\n")
218 (dotimes (i (* 48 48))
220 (dotimes (plane depth)
221 (setq pixel (+ (* pixel 2) (aref (nth plane bit-arrays) i))))
222 (insert (number-to-string (* scale pixel)) " "))
223 (gnus-shell-command-on-region
224 (point-min) (point-max)
229 (defun gnus-convert-gray-x-face-region (beg end)
230 "Convert the X-Faces in region to a PPM file."
232 (let ((input (buffer-substring beg end))
236 (goto-char (point-min))
239 (mail-header-narrow-to-field)
240 (push (mail-header-field-value) faces)
241 (goto-char (point-max)))))
242 (gnus-convert-gray-x-face-to-xpm faces)))
244 (defface gnus-x-face '((t (:foreground "black" :background "white")))
245 "Face to show X-Face.
246 The colors from this face are used as the foreground and background
247 colors of the displayed X-Faces."
248 :group 'gnus-article-headers)
250 (defun gnus-display-x-face-in-from (data)
251 "Display the X-Face DATA in the From header."
252 (let ((default-enable-multibyte-characters nil)
254 (when (or (gnus-image-type-available-p 'xface)
255 (and (gnus-image-type-available-p 'pbm)
256 (setq pbm (uncompface data))))
259 (article-narrow-to-head)
260 (gnus-article-goto-header "from")
262 (insert "From: [no `from' set]\n")
267 (if (gnus-image-type-available-p 'xface)
269 (concat "X-Face: " data)
270 'xface t :ascent 'center :face 'gnus-x-face)
272 pbm 'pbm t :ascent 'center :face 'gnus-x-face))))
273 (gnus-add-wash-type 'xface))))))
275 (defun gnus-grab-cam-x-face ()
276 "Grab a picture off the camera and make it into an X-Face."
278 (shell-command "xawtv-remote snap ppm")
280 (while (null (setq file (directory-files "/tftpboot/sparky/tmp"
283 (setq file (car file))
286 (format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | ppmnorm 2>/dev/null | pnmscale -width 48 | ppmtopgm | pgmtopbm -threshold -value 0.92 | pbmtoxbm | compface"
293 (defun gnus-grab-gray-x-face ()
294 "Grab a picture off the camera and make it into an X-Face."
296 (shell-command "xawtv-remote snap ppm")
298 (while (null (setq file (directory-files "/tftpboot/sparky/tmp"
301 (setq file (car file))
304 (format "pnmcut -left 70 -top 100 -width 144 -height 144 '%s' | ppmquant 256 2>/dev/null | ppmtogif > '%s.gif'"
308 (gnus-convert-image-to-gray-x-face (concat file ".gif") 3)
309 (delete-file (concat file ".gif"))))
313 ;;; gnus-fun.el ends here