1 ;;; gnus-picon.el --- displaying pretty icons in Gnus
3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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 3 of the License, or
14 ;; (at your option) any later version.
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. If not, see <http://www.gnu.org/licenses/>.
26 ;; There are three picon types relevant to Gnus:
28 ;; Persons: person@subdomain.dom
29 ;; users/dom/subdomain/person/face.gif
30 ;; usenix/dom/subdomain/person/face.gif
31 ;; misc/MISC/person/face.gif
32 ;; Domains: subdomain.dom
33 ;; domain/dom/subdomain/unknown/face.gif
34 ;; Groups: comp.lang.lisp
35 ;; news/comp/lang/lisp/unknown/face.gif
37 ;; Original implementation by Wes Hardaker <hardaker@ece.ucdavis.edu>.
43 (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
45 (eval-when-compile (require 'cl))
52 (defcustom gnus-picon-news-directories '("news")
53 "*List of directories to search for newsgroups faces."
54 :type '(repeat string)
57 (defcustom gnus-picon-user-directories '("users" "usenix" "local" "misc")
58 "*List of directories to search for user faces."
59 :type '(repeat string)
62 (defcustom gnus-picon-domain-directories '("domains")
63 "*List of directories to search for domain faces.
64 Some people may want to add \"unknown\" to this list."
65 :type '(repeat string)
68 (defcustom gnus-picon-file-types
69 (let ((types (list "xbm")))
70 (when (gnus-image-type-available-p 'gif)
72 (when (gnus-image-type-available-p 'xpm)
75 "*List of suffixes on picon file names to try."
76 :type '(repeat string)
79 (defcustom gnus-picon-style 'inline
80 "How should picons be displayed.
81 If `inline', the textual representation is replaced. If `right', picons are
82 added right to the textual representation."
83 ;; FIXME: `right' needs improvement for XEmacs.
84 :type '(choice (const inline)
88 ;;; Internal variables:
90 (defvar gnus-picon-glyph-alist nil
92 List of pairs (KEY . GLYPH) where KEY is either a filename or an URL.")
93 (defvar gnus-picon-cache nil)
97 (defsubst gnus-picon-split-address (address)
98 (setq address (split-string address "@"))
99 (if (stringp (cadr address))
100 (cons (car address) (split-string (cadr address) "\\."))
101 (if (stringp (car address))
102 (split-string (car address) "\\."))))
104 (defun gnus-picon-find-face (address directories &optional exact)
105 (let* ((address (gnus-picon-split-address address))
108 database directory result instance base)
110 (dolist (database gnus-picon-databases)
111 (dolist (directory directories)
112 (setq address faddress
113 base (expand-file-name directory database))
115 (when (setq result (gnus-picon-find-image
116 (concat base "/" (mapconcat 'downcase
119 "/" (downcase user) "/")))
120 (throw 'found result))
124 ;; Kludge to search MISC as well. But not in "news".
125 (unless (string= directory "news")
126 (when (setq result (gnus-picon-find-image
127 (concat base "/MISC/" user "/")))
128 (throw 'found result))))))))
130 (defun gnus-picon-find-image (directory)
131 (let ((types gnus-picon-file-types)
133 (while (and (not found)
134 (setq type (pop types)))
135 (setq found (file-exists-p (setq file (concat directory "face." type)))))
140 (defun gnus-picon-insert-glyph (glyph category &optional nostring)
141 "Insert GLYPH into the buffer.
142 GLYPH can be either a glyph or a string. When NOSTRING, no textual
143 replacement is added."
144 ;; Using NOSTRING prevents wrong BBDB entries with `gnus-picon-style' set to
148 (gnus-add-wash-type category)
149 (gnus-add-image category (car glyph))
150 (gnus-put-image (car glyph) (unless nostring (cdr glyph)) category)))
152 (defun gnus-picon-create-glyph (file)
153 (or (cdr (assoc file gnus-picon-glyph-alist))
154 (cdar (push (cons file (gnus-create-image file))
155 gnus-picon-glyph-alist))))
157 ;;; Functions that does picon transformations:
159 (declare-function image-size "image.c" (spec &optional pixels frame))
161 (defun gnus-picon-transform-address (header category)
162 (gnus-with-article-headers
164 (mail-header-parse-addresses
165 ;; mail-header-parse-addresses does not work (reliably) on
169 (mail-encode-encoded-word-string
170 (or (mail-fetch-field header) "")))
171 (mail-fetch-field header))))
172 spec file point cache len)
173 (dolist (address addresses)
174 (setq address (car address))
175 (when (and (stringp address)
176 (setq spec (gnus-picon-split-address address)))
177 (if (setq cache (cdr (assoc address gnus-picon-cache)))
179 (when (setq file (or (gnus-picon-find-face
180 address gnus-picon-user-directories)
181 (gnus-picon-find-face
184 'identity (cdr spec) "."))
185 gnus-picon-user-directories)))
186 (setcar spec (cons (gnus-picon-create-glyph file)
189 (dotimes (i (1- (length spec)))
190 (when (setq file (gnus-picon-find-face
193 'identity (nthcdr (1+ i) spec) "."))
194 gnus-picon-domain-directories t))
195 (setcar (nthcdr (1+ i) spec)
196 (cons (gnus-picon-create-glyph file)
197 (nth (1+ i) spec)))))
198 (setq spec (nreverse spec))
199 (push (cons address spec) gnus-picon-cache))
201 (gnus-article-goto-header header)
202 (mail-header-narrow-to-field)
203 (case gnus-picon-style
205 (when (= (length addresses) 1)
206 (setq len (apply '+ (mapcar (lambda (x)
208 (car (image-size (car x)))
211 (goto-char (point-at-eol))
215 (list :align-to (- (window-width) 1 len))))))
216 (goto-char (point-at-eol))
217 (setq point (point-at-eol))
219 (unless (stringp image)
221 (gnus-picon-insert-glyph image category 'nostring)))))
223 (when (search-forward address nil t)
224 (delete-region (match-beginning 0) (match-end 0))
228 (if (> (length spec) 2)
230 (if (= (length spec) 2)
232 (gnus-picon-insert-glyph (pop spec) category))))))))))
234 (defun gnus-picon-transform-newsgroups (header)
236 (gnus-with-article-headers
237 (gnus-article-goto-header header)
238 (mail-header-narrow-to-field)
239 (let ((groups (message-tokenize-header (mail-fetch-field header)))
241 (dolist (group groups)
242 (unless (setq spec (cdr (assoc group gnus-picon-cache)))
243 (setq spec (nreverse (split-string group "[.]")))
244 (dotimes (i (length spec))
245 (when (setq file (gnus-picon-find-face
248 'identity (nthcdr i spec) "."))
249 gnus-picon-news-directories t))
250 (setcar (nthcdr i spec)
251 (cons (gnus-picon-create-glyph file)
253 (push (cons group spec) gnus-picon-cache))
254 (when (search-forward group nil t)
255 (delete-region (match-beginning 0) (match-end 0))
257 (narrow-to-region (point) (point))
259 (goto-char (point-min))
260 (if (> (length spec) 1)
262 (gnus-picon-insert-glyph (pop spec) 'newsgroups-picon))
263 (goto-char (point-max))))))))
267 ;; #### NOTE: the test for buffer-read-only is the same as in
268 ;; article-display-[x-]face. See the comment up there.
271 (defun gnus-treat-from-picon ()
272 "Display picons in the From header.
273 If picons are already displayed, remove them."
275 (let ((wash-picon-p buffer-read-only))
276 (gnus-with-article-buffer
277 (if (and wash-picon-p (memq 'from-picon gnus-article-wash-types))
278 (gnus-delete-images 'from-picon)
279 (gnus-picon-transform-address "from" 'from-picon)))))
282 (defun gnus-treat-mail-picon ()
283 "Display picons in the Cc and To headers.
284 If picons are already displayed, remove them."
286 (let ((wash-picon-p buffer-read-only))
287 (gnus-with-article-buffer
288 (if (and wash-picon-p (memq 'mail-picon gnus-article-wash-types))
289 (gnus-delete-images 'mail-picon)
290 (gnus-picon-transform-address "cc" 'mail-picon)
291 (gnus-picon-transform-address "to" 'mail-picon)))))
294 (defun gnus-treat-newsgroups-picon ()
295 "Display picons in the Newsgroups and Followup-To headers.
296 If picons are already displayed, remove them."
298 (let ((wash-picon-p buffer-read-only))
299 (gnus-with-article-buffer
300 (if (and wash-picon-p (memq 'newsgroups-picon gnus-article-wash-types))
301 (gnus-delete-images 'newsgroups-picon)
302 (gnus-picon-transform-newsgroups "newsgroups")
303 (gnus-picon-transform-newsgroups "followup-to")))))
305 (provide 'gnus-picon)
307 ;;; gnus-picon.el ends here