1 ;;; gnus-picon.el --- displaying pretty icons in Gnus
3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001
4 ;; Free Software Foundation, Inc.
6 ;; Author: Wes Hardaker <hardaker@ece.ucdavis.edu>
7 ;; Keywords: news xpm annotation glyph faces
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 ;; There are three picon types relevant to Gnus:
30 ;; Persons: person@subdomain.dom
31 ;; users/dom/subdomain/person/face.gif
32 ;; usenix/dom/subdomain/person/face.gif
33 ;; misc/MISC/person/face.gif
34 ;; Domains: subdomain.dom
35 ;; domain/dom/subdomain/unknown/face.gif
36 ;; Groups: comp.lang.lisp
37 ;; news/comp/lang/lisp/unknown/face.gif
48 "Show pictures of people, domains, and newsgroups."
51 (defcustom gnus-picon-databases '("/usr/lib/picon" "/usr/local/faces")
52 "*Defines the location of the faces database.
53 For information on obtaining this database of pretty pictures, please
54 see http://www.cs.indiana.edu/picons/ftp/index.html"
58 (defcustom gnus-picon-news-directories '("news")
59 "*List of directories to search for newsgroups faces."
60 :type '(repeat string)
63 (defcustom gnus-picon-user-directories '("users" "usenix" "local"
65 "*List of directories to search for user faces."
66 :type '(repeat string)
69 (defcustom gnus-picon-domain-directories '("domains")
70 "*List of directories to search for domain faces.
71 Some people may want to add \"unknown\" to this list."
72 :type '(repeat string)
75 (defcustom gnus-picon-file-types
76 (let ((types (list "xbm")))
77 (when (gnus-image-type-available-p 'gif)
79 (when (gnus-image-type-available-p 'xpm)
82 "*List of suffixes on picon file names to try."
83 :type '(repeat string)
86 (defface gnus-picon-xbm-face '((t (:foreground "black" :background "white")))
87 "Face to show xbm picon in."
90 (defface gnus-picon-face '((t (:foreground "black" :background "white")))
91 "Face to show picon in."
94 ;;; Internal variables:
96 (defvar gnus-picon-setup-p nil)
97 (defvar gnus-picon-glyph-alist nil
99 List of pairs (KEY . GLYPH) where KEY is either a filename or an URL.")
103 (defsubst gnus-picon-split-address (address)
104 (setq address (split-string address "@"))
105 (if (stringp (cadr address))
106 (cons (car address) (split-string (cadr address) "\\."))
107 (if (stringp (car address))
108 (split-string (car address) "\\."))))
110 (defun gnus-picon-find-face (address directories &optional exact)
111 (let* ((address (gnus-picon-split-address address))
114 database directory result instance base)
116 (dolist (database gnus-picon-databases)
117 (dolist (directory directories)
118 (setq address faddress
119 base (expand-file-name directory database))
121 (when (setq result (gnus-picon-find-image
122 (concat base "/" (mapconcat 'identity
126 (throw 'found result))
130 ;; Kludge to search MISC as well.
131 (when (setq result (gnus-picon-find-image
132 (concat base "/MISC/" user "/")))
133 (throw 'found result)))))))
135 (defun gnus-picon-find-image (directory)
136 (let ((types gnus-picon-file-types)
138 (while (and (not found)
139 (setq type (pop types)))
140 (setq found (file-exists-p (setq file (concat directory "face." type)))))
145 (defun gnus-picon-insert-glyph (glyph category)
146 "Insert GLYPH into the buffer.
147 GLYPH can be either a glyph or a string."
150 (gnus-add-wash-type category)
151 (gnus-add-image category (car glyph))
152 (gnus-put-image (car glyph) (cdr glyph))))
154 (defun gnus-picon-create-glyph (file)
155 (or (cdr (assoc file gnus-picon-glyph-alist))
156 (cdar (push (cons file (gnus-create-image file))
157 gnus-picon-glyph-alist))))
159 ;;; Functions that does picon transformations:
161 (defun gnus-picon-transform-address (header category)
162 (gnus-with-article-headers
164 (mail-header-parse-addresses (mail-fetch-field header)))
166 (dolist (address addresses)
167 (setq address (car address)
169 (when (and (stringp address)
170 (setq spec (gnus-picon-split-address address)))
171 (when (setq file (or (gnus-picon-find-face
172 address gnus-picon-user-directories)
173 (gnus-picon-find-face
176 'identity (cdr spec) "."))
177 gnus-picon-user-directories)))
178 (setcar spec (cons (gnus-picon-create-glyph file)
181 (dotimes (i (1- (length spec)))
182 (when (setq file (gnus-picon-find-face
185 'identity (nthcdr (1+ i) spec) "."))
186 gnus-picon-domain-directories t))
187 (setcar (nthcdr (1+ i) spec)
188 (cons (gnus-picon-create-glyph file)
189 (nth (1+ i) spec)))))
191 (gnus-article-goto-header header)
192 (mail-header-narrow-to-field)
193 (when (search-forward address nil t)
194 (delete-region (match-beginning 0) (match-end 0))
196 (gnus-picon-insert-glyph (pop spec) category)
201 (setq first nil))))))))))
203 (defun gnus-picon-transform-newsgroups (header)
205 (gnus-with-article-headers
208 (message-tokenize-header (mail-fetch-field header))
209 (lambda (g1 g2) (> (length g1) (length g2)))))
211 (dolist (group groups)
212 (setq spec (nreverse (split-string group "[.]")))
213 (dotimes (i (length spec))
214 (when (setq file (gnus-picon-find-face
217 'identity (nthcdr i spec) "."))
218 gnus-picon-news-directories t))
219 (setcar (nthcdr i spec)
220 (cons (gnus-picon-create-glyph file)
223 (gnus-article-goto-header header)
224 (mail-header-narrow-to-field)
225 (when (search-forward group nil t)
226 (delete-region (match-beginning 0) (match-end 0))
227 (setq spec (nreverse spec))
229 (gnus-picon-insert-glyph (pop spec) 'newsgroups-picon)
236 (defun gnus-treat-from-picon ()
237 "Display picons in the From header.
238 If picons are already displayed, remove them."
240 (gnus-with-article-buffer
241 (if (memq 'from-picon gnus-article-wash-types)
242 (gnus-delete-images 'from-picon)
243 (gnus-picon-transform-address "from" 'from-picon))))
246 (defun gnus-treat-mail-picon ()
247 "Display picons in the Cc and To headers.
248 If picons are already displayed, remove them."
250 (gnus-with-article-buffer
251 (if (memq 'mail-picon gnus-article-wash-types)
252 (gnus-delete-images 'mail-picon)
253 (gnus-picon-transform-address "cc" 'mail-picon)
254 (gnus-picon-transform-address "to" 'mail-picon))))
257 (defun gnus-treat-newsgroups-picon ()
258 "Display picons in the Newsgroups and Followup-To headers.
259 If picons are already displayed, remove them."
261 (gnus-with-article-buffer
262 (if (memq 'newsgroups-picon gnus-article-wash-types)
263 (gnus-delete-images 'newsgroups-picon)
264 (gnus-picon-transform-newsgroups "newsgroups")
265 (gnus-picon-transform-newsgroups "followup-to"))))
267 (provide 'gnus-picon)
269 ;;; gnus-picon.el ends here