1 ;;; gnus-fun.el --- various frivolous extension functions to Gnus
3 ;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 3, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
37 (defcustom gnus-x-face-directory
(expand-file-name "x-faces" gnus-directory
)
38 "*Directory where X-Face PBM files are stored."
43 (defcustom gnus-convert-pbm-to-x-face-command
"pbmtoxbm %s | compface"
44 "Command for converting a PBM to an X-Face."
49 (defcustom gnus-convert-image-to-x-face-command
"giftopnm %s | ppmnorm | pnmscale -width 48 -height 48 | ppmtopgm | pgmtopbm | pbmtoxbm | compface"
50 "Command for converting an image to an X-Face.
51 By default it takes a GIF filename and output the X-Face header data
57 (defcustom gnus-convert-image-to-face-command
"djpeg %s | ppmnorm | pnmscale -width 48 -height 48 | ppmquant %d | pnmtopng"
58 "Command for converting an image to a Face.
59 By default it takes a JPEG filename and output the Face header data
65 (defun gnus-shell-command-to-string (command)
66 "Like `shell-command-to-string' except not mingling ERROR."
67 (with-output-to-string
68 (call-process shell-file-name nil
(list standard-output nil
)
69 nil shell-command-switch command
)))
71 (defun gnus-shell-command-on-region (start end command
)
72 "A simplified `shell-command-on-region'.
73 Output to the current buffer, replace text, and don't mingle error."
74 (call-process-region start end shell-file-name t
75 (list (current-buffer) nil
)
76 nil shell-command-switch command
))
79 (defun gnus-random-x-face ()
80 "Return X-Face header data chosen randomly from `gnus-x-face-directory'."
82 (when (file-exists-p gnus-x-face-directory
)
83 (let* ((files (directory-files gnus-x-face-directory t
"\\.pbm$"))
84 (file (nth (random (length files
)) files
)))
86 (gnus-shell-command-to-string
87 (format gnus-convert-pbm-to-x-face-command
88 (shell-quote-argument file
)))))))
91 (defun gnus-insert-random-x-face-header ()
92 "Insert a random X-Face header from `gnus-x-face-directory'."
94 (let ((data (gnus-random-x-face)))
98 (insert "X-Face: " data
)
100 "No face returned by `gnus-random-x-face'. Does %s/*.pbm exist?"
101 gnus-x-face-directory
)))))
104 (defun gnus-x-face-from-file (file)
105 "Insert an X-Face header based on an image file."
106 (interactive "fImage file name (by default GIF): ")
107 (when (file-exists-p file
)
108 (gnus-shell-command-to-string
109 (format gnus-convert-image-to-x-face-command
110 (shell-quote-argument (expand-file-name file
))))))
113 (defun gnus-face-from-file (file)
114 "Return a Face header based on an image file."
115 (interactive "fImage file name (by default JPEG): ")
116 (when (file-exists-p file
)
120 (while (and (not done
)
123 (let ((coding-system-for-read 'binary
))
124 (gnus-shell-command-to-string
125 (format gnus-convert-image-to-face-command
126 (shell-quote-argument (expand-file-name file
))
128 (if (> (length attempt
) 726)
130 (setq quant
(- quant
2))
131 (gnus-message 9 "Length %d; trying quant %d"
132 (length attempt
) quant
))
135 (mm-with-unibyte-buffer
140 (defun gnus-face-encode ()
142 (base64-encode-region (point-min) (point-max))
143 (goto-char (point-min))
144 (while (search-forward "\n" nil t
)
146 (goto-char (point-min))
147 (while (> (- (point-max) (point))
155 (defun gnus-convert-face-to-png (face)
156 "Convert FACE (which is base64-encoded) to a PNG.
157 The PNG is returned as a string."
158 (mm-with-unibyte-buffer
161 (base64-decode-region (point-min) (point-max)))
165 (defun gnus-convert-png-to-face (file)
166 "Convert FILE to a Face.
167 FILE should be a PNG file that's 48x48 and smaller than or equal to
169 (mm-with-unibyte-buffer
170 (insert-file-contents file
)
171 (when (> (buffer-size) 726)
172 (error "The file is %d bytes long, which is too long"
176 (defface gnus-x-face
'((t (:foreground
"black" :background
"white")))
177 "Face to show X-Face.
178 The colors from this face are used as the foreground and background
179 colors of the displayed X-Faces."
180 :group
'gnus-article-headers
)
182 (defun gnus-display-x-face-in-from (data)
183 "Display the X-Face DATA in the From header."
184 (let ((default-enable-multibyte-characters nil
)
186 (when (or (gnus-image-type-available-p 'xface
)
187 (and (gnus-image-type-available-p 'pbm
)
188 (setq pbm
(uncompface data
))))
191 (article-narrow-to-head)
192 (gnus-article-goto-header "from")
194 (insert "From: [no `from' set]\n")
199 (if (gnus-image-type-available-p 'xface
)
201 (concat "X-Face: " data
)
202 'xface t
:face
'gnus-x-face
)
204 pbm
'pbm t
:face
'gnus-x-face
)) nil
'xface
))
205 (gnus-add-wash-type 'xface
))))))
207 (defun gnus-grab-cam-x-face ()
208 "Grab a picture off the camera and make it into an X-Face."
210 (shell-command "xawtv-remote snap ppm")
212 (while (null (setq file
(directory-files "/tftpboot/sparky/tmp"
215 (setq file
(car file
))
218 (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"
225 (defun gnus-grab-cam-face ()
226 "Grab a picture off the camera and make it into an X-Face."
228 (shell-command "xawtv-remote snap ppm")
231 (while (null (setq file
(directory-files "/tftpboot/sparky/tmp"
234 (setq file
(car file
))
236 (format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | pnmscale -width 48 -height 48 | ppmtopgm > /tmp/gnus.face.ppm"
238 (let ((gnus-convert-image-to-face-command
239 (format "cat '%%s' | ppmquant %%d | ppmchange %s | pnmtopng"
240 (gnus-fun-ppm-change-string))))
241 (setq result
(gnus-face-from-file "/tmp/gnus.face.ppm")))
243 ;;(delete-file "/tmp/gnus.face.ppm")
246 (defun gnus-fun-ppm-change-string ()
247 (let* ((possibilites '("%02x0000" "00%02x00" "0000%02x"
248 "%02x%02x00" "00%02x%02x" "%02x00%02x"))
249 (format (concat "'#%02x%02x%02x' '#"
250 (nth (random 6) possibilites
)
254 (push (format format i i i i i i
)
256 (mapconcat 'identity values
" ")))
260 ;;; arch-tag: 9d000a69-15cc-4491-9dc0-4627484f50c1
261 ;;; gnus-fun.el ends here