1 ;;; gnus-picon.el --- displaying pretty icons in Gnus
2 ;; Copyright (C) 1996 Free Software Foundation, Inc.
4 ;; Author: Wes Hardaker <hardaker@ece.ucdavis.edu>
5 ;; Keywords: news xpm annotation glyph faces
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.
27 ;; - You must have XEmacs (19.12 or above I think) to use this.
28 ;; - Read the variable descriptions below.
32 ;; 1) display the icons in its own buffer:
34 ;; (add-hook 'gnus-article-display-hook 'gnus-article-display-picons t)
35 ;; (add-hook 'gnus-summary-prepare-hook 'gnus-group-display-picons t)
36 ;; (setq gnus-picons-display-where 'picons)
38 ;; Then add the picons buffer to your display configuration:
39 ;; The picons buffer needs to be at least 48 pixels high,
40 ;; which for me is 5 lines:
42 ;; (gnus-add-configuration
43 ;; '(article (vertical 1.0
46 ;; (summary .25 point)
49 ;; (gnus-add-configuration
50 ;; '(summary (vertical 1.0 (group 6)
52 ;; (summary 1.0 point))))
54 ;; 2) display the icons in the summary buffer
56 ;; (add-hook 'gnus-article-display-hook 'gnus-article-display-picons t)
57 ;; (add-hook 'gnus-summary-prepare-hook 'gnus-group-display-picons t)
58 ;; (setq gnus-picons-display-where 'summary)
60 ;; 3) display the icons in the article buffer
62 ;; (add-hook 'gnus-article-display-hook 'gnus-article-display-picons t)
63 ;; (add-hook 'gnus-article-prepare-hook 'gnus-group-display-picons t)
64 ;; (setq gnus-picons-display-where 'article)
68 ;; - I'm not even close to being a lisp expert.
69 ;; - The 't' (append) flag MUST be in the add-hook line
72 ;; - Remove the TODO section in the headers.
78 (require 'annotations)
79 (eval-when-compile (require 'cl))
81 (defvar gnus-picons-buffer "*Icon Buffer*"
82 "Buffer name to display the icons in if gnus-picons-display-where is 'picons.")
84 (defvar gnus-picons-display-where 'picons
85 "Where to display the group and article icons.")
87 (defvar gnus-picons-database "/usr/local/faces"
88 "Defines the location of the faces database.
89 For information on obtaining this database of pretty pictures, please
90 see http://www.cs.indiana.edu/picons/ftp/index.html" )
92 (defvar gnus-picons-news-directory "news"
93 "Sub-directory of the faces database containing the icons for newsgroups."
96 (defvar gnus-picons-user-directories '("local" "users" "usenix" "misc/MISC")
97 "List of directories to search for user faces."
100 (defvar gnus-picons-domain-directories '("domains")
101 "List of directories to search for domain faces.
102 Some people may want to add \"unknown\" to this list."
105 (defvar gnus-picons-x-face-file-name
106 (format "/tmp/picon-xface.%s.xbm" (user-login-name))
107 "The name of the file in which to store the converted X-face header.")
109 (defvar gnus-picons-convert-x-face (format "{ echo '/* Width=48, Height=48 */'; uncompface; } | icontopbm | pbmtoxbm > %s" gnus-picons-x-face-file-name)
110 "Command to convert the x-face header into a xbm file."
113 (defvar gnus-picons-get-maximum-picons t
114 "*If non-nil, display all picons that apply to the article.
115 If this is nil, use just the \"best\" (or most relevant) picon.")
117 (defvar gnus-group-annotations nil)
118 (defvar gnus-article-annotations nil)
119 (defvar gnus-x-face-annotations nil)
121 (defun gnus-picons-remove (plist)
122 (let ((listitem (car plist)))
123 (while (setq listitem (car plist))
124 (if (annotationp listitem)
125 (delete-annotation listitem))
126 (setq plist (cdr plist))))
129 (defun gnus-picons-remove-all ()
130 "Removes all picons from the Gnus display(s)."
132 (gnus-picons-remove gnus-article-annotations)
133 (gnus-picons-remove gnus-group-annotations)
134 (gnus-picons-remove gnus-x-face-annotations)
135 (setq gnus-article-annotations nil
136 gnus-group-annotations nil
137 gnus-x-face-annotations nil)
138 (if (bufferp gnus-picons-buffer)
139 (kill-buffer gnus-picons-buffer))
142 (defun gnus-get-buffer-name (variable)
143 "Returns the buffer name associated with the contents of a variable."
144 (cond ((symbolp variable)
145 (let ((newvar (cdr (assq variable gnus-window-to-buffer))))
146 (cond ((symbolp newvar)
147 (symbol-value newvar))
148 ((stringp newvar) newvar))))
152 (defun gnus-picons-article-display-x-face ()
153 "Display the x-face header bitmap in the 'gnus-picons-display-where buffer."
154 ;; delete any old ones.
155 (gnus-picons-remove gnus-x-face-annotations)
156 (setq gnus-x-face-annotations nil)
157 ;; display the new one.
158 (let ((gnus-article-x-face-command 'gnus-picons-display-x-face))
159 (gnus-article-display-x-face)))
161 (defun gnus-picons-display-x-face (beg end)
162 "Function to display the x-face header in the picons window.
163 To use: (setq gnus-article-x-face-command 'gnus-picons-display-x-face)"
165 ;; convert the x-face header to a .xbm file
166 (let ((process-connection-type nil)
168 (process-kill-without-query
169 (setq process (start-process
170 "gnus-x-face" nil shell-file-name shell-command-switch
171 gnus-picons-convert-x-face)))
172 (process-send-region "gnus-x-face" beg end)
173 (process-send-eof "gnus-x-face")
175 (while (not (equal (process-status process) 'exit))
179 (set-buffer (get-buffer-create (gnus-get-buffer-name
180 gnus-picons-display-where)))
181 (gnus-add-current-to-buffer-list)
182 (goto-char (point-min))
183 (let ((iconpoint (point))
185 (unless (looking-at "$")
188 ;; append the annotation to gnus-article-annotations for deletion.
189 (setq gnus-x-face-annotations
191 (gnus-picons-try-to-find-face
192 gnus-picons-x-face-file-name iconpoint)
193 gnus-x-face-annotations)))
194 ;; delete the tmp file
195 (delete-file gnus-picons-x-face-file-name)))
197 (defun gnus-article-display-picons ()
198 "Display faces for an author and his/her domain in gnus-picons-display-where."
200 (if (and (featurep 'xpm)
201 (or (not (fboundp 'device-type)) (equal (device-type) 'x))
202 (mail-fetch-field "from"))
204 (let* ((from (mail-fetch-field "from"))
207 (string-match "\\([-_a-zA-Z0-9]+\\)@" from)
208 (match-string 1 from)))
211 (gnus-picons-reverse-domain-path
214 (cadr (mail-extract-address-components from))
215 ".*@\\(.*\\)\\'" "\\1")
217 (set-buffer (gnus-get-buffer-name gnus-picons-display-where))
218 (gnus-add-current-to-buffer-list)
219 (goto-char (point-min))
220 (if (eq gnus-picons-display-where 'article)
221 (and (search-forward "\n\n" nil t)
226 (gnus-picons-remove gnus-article-annotations)
227 (setq gnus-article-annotations nil)
228 (if (equal username from)
229 (setq username (progn
230 (string-match "<\\([_a-zA-Z0-9-.]+\\)>" from)
231 (match-string 1 from))))
232 (mapcar (lambda (pathpart)
233 (setq gnus-article-annotations
235 (gnus-picons-insert-face-if-exists
237 (file-name-as-directory
238 gnus-picons-database) pathpart)
239 (concat hostpath username)
241 gnus-article-annotations)))
242 gnus-picons-user-directories)
243 (mapcar (lambda (pathpart)
244 (setq gnus-article-annotations
246 (gnus-picons-insert-face-if-exists
247 (concat (file-name-as-directory
248 gnus-picons-database) pathpart)
249 (concat hostpath "unknown")
251 gnus-article-annotations)))
252 gnus-picons-domain-directories)
253 (add-hook 'gnus-summary-exit-hook 'gnus-picons-remove-all)
256 (defun gnus-group-display-picons ()
257 "Display icons for the group in the gnus-picons-display-where buffer."
259 (when (and (featurep 'xpm)
260 (or (not (fboundp 'device-type)) (equal (device-type) 'x)))
262 (set-buffer (get-buffer-create
263 (gnus-get-buffer-name gnus-picons-display-where)))
264 (gnus-add-current-to-buffer-list)
265 (goto-char (point-min))
266 (if (eq gnus-picons-display-where 'article)
267 (and (search-forward "\n\n" nil t)
273 ((listp gnus-group-annotations)
274 (mapcar 'delete-annotation gnus-group-annotations)
275 (setq gnus-group-annotations nil))
276 ((annotationp gnus-group-annotations)
277 (delete-annotation gnus-group-annotations)
278 (setq gnus-group-annotations nil)))
279 (gnus-picons-remove gnus-group-annotations)
280 (setq gnus-group-annotations nil)
281 (setq gnus-group-annotations
282 (gnus-picons-insert-face-if-exists
283 (concat (file-name-as-directory gnus-picons-database)
284 gnus-picons-news-directory)
285 (concat (replace-in-string gnus-newsgroup-name "\\." "/")
288 (add-hook 'gnus-summary-exit-hook 'gnus-picons-remove-all))))
290 (defun gnus-picons-insert-face-if-exists (path filename ipoint &optional rev)
291 "Inserts a face at point if I can find one"
292 (let ((file (concat path "/" filename))
293 (xpm (if (featurep 'xpm) "xpm" "xbm"))
295 (while (and (or (not found)
296 gnus-picons-get-maximum-picons)
297 (>= (length file) (length path)))
298 (or (file-exists-p (setq found (concat file "/face." xpm)))
299 (file-exists-p (setq found (concat file "/unknown/face." xpm)))
302 (setq picons (nconc (gnus-picons-try-to-find-face found ipoint)
304 (setq file (directory-file-name (file-name-directory file))))
307 (defun gnus-picons-try-to-find-face (path ipoint)
308 "If PATH exists, display it as a bitmap. Returns t if succedded."
309 (when (file-exists-p path)
310 (let ((gl (make-glyph path)))
311 (set-glyph-face gl 'default)
312 (list (make-annotation gl ipoint 'text)))))
314 (defun gnus-picons-reverse-domain-path (str)
316 (mapconcat 'identity (nreverse (message-tokenize-header str "/")) "/"))
318 (provide 'gnus-picon)
320 ;;; gnus-picon.el ends here