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1 | ;;; gnus-picon.el --- displaying pretty icons in Gnus |
2 | ||
e84b4b86 | 3 | ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
d7a0267c | 4 | ;; 2005, 2006, 2007 Free Software Foundation, Inc. |
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5 | |
6 | ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> | |
7 | ;; Keywords: news xpm annotation glyph faces | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
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) | |
14 | ;; any later version. | |
15 | ||
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. | |
20 | ||
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 | |
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23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | ;; Boston, MA 02110-1301, USA. | |
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25 | |
26 | ;;; Commentary: | |
27 | ||
28 | ;; There are three picon types relevant to Gnus: | |
29 | ;; | |
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 | |
38 | ;; | |
39 | ;; Original implementation by Wes Hardaker <hardaker@ece.ucdavis.edu>. | |
40 | ;; | |
41 | ;;; Code: | |
42 | ||
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43 | (eval-when-compile (require 'cl)) |
44 | ||
23f87bed | 45 | (require 'gnus) |
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46 | (require 'gnus-art) |
47 | ||
48 | ;;; User variables: | |
49 | ||
50 | (defcustom gnus-picon-news-directories '("news") | |
51 | "*List of directories to search for newsgroups faces." | |
52 | :type '(repeat string) | |
53 | :group 'gnus-picon) | |
54 | ||
55 | (defcustom gnus-picon-user-directories '("users" "usenix" "local" "misc") | |
56 | "*List of directories to search for user faces." | |
57 | :type '(repeat string) | |
58 | :group 'gnus-picon) | |
59 | ||
60 | (defcustom gnus-picon-domain-directories '("domains") | |
61 | "*List of directories to search for domain faces. | |
62 | Some people may want to add \"unknown\" to this list." | |
63 | :type '(repeat string) | |
64 | :group 'gnus-picon) | |
65 | ||
66 | (defcustom gnus-picon-file-types | |
67 | (let ((types (list "xbm"))) | |
68 | (when (gnus-image-type-available-p 'gif) | |
69 | (push "gif" types)) | |
70 | (when (gnus-image-type-available-p 'xpm) | |
71 | (push "xpm" types)) | |
72 | types) | |
73 | "*List of suffixes on picon file names to try." | |
74 | :type '(repeat string) | |
75 | :group 'gnus-picon) | |
76 | ||
0f49874b | 77 | (defface gnus-picon-xbm '((t (:foreground "black" :background "white"))) |
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78 | "Face to show xbm picon in." |
79 | :group 'gnus-picon) | |
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80 | ;; backward-compatibility alias |
81 | (put 'gnus-picon-xbm-face 'face-alias 'gnus-picon-xbm) | |
23f87bed | 82 | |
0f49874b | 83 | (defface gnus-picon '((t (:foreground "black" :background "white"))) |
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84 | "Face to show picon in." |
85 | :group 'gnus-picon) | |
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86 | ;; backward-compatibility alias |
87 | (put 'gnus-picon-face 'face-alias 'gnus-picon) | |
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88 | |
89 | ;;; Internal variables: | |
90 | ||
91 | (defvar gnus-picon-setup-p nil) | |
92 | (defvar gnus-picon-glyph-alist nil | |
93 | "Picon glyphs cache. | |
94 | List of pairs (KEY . GLYPH) where KEY is either a filename or an URL.") | |
95 | (defvar gnus-picon-cache nil) | |
96 | ||
97 | ;;; Functions: | |
98 | ||
99 | (defsubst gnus-picon-split-address (address) | |
100 | (setq address (split-string address "@")) | |
101 | (if (stringp (cadr address)) | |
102 | (cons (car address) (split-string (cadr address) "\\.")) | |
103 | (if (stringp (car address)) | |
104 | (split-string (car address) "\\.")))) | |
105 | ||
106 | (defun gnus-picon-find-face (address directories &optional exact) | |
107 | (let* ((address (gnus-picon-split-address address)) | |
108 | (user (pop address)) | |
109 | (faddress address) | |
110 | database directory result instance base) | |
111 | (catch 'found | |
112 | (dolist (database gnus-picon-databases) | |
113 | (dolist (directory directories) | |
114 | (setq address faddress | |
115 | base (expand-file-name directory database)) | |
116 | (while address | |
117 | (when (setq result (gnus-picon-find-image | |
118 | (concat base "/" (mapconcat 'downcase | |
119 | (reverse address) | |
120 | "/") | |
121 | "/" (downcase user) "/"))) | |
122 | (throw 'found result)) | |
123 | (if exact | |
124 | (setq address nil) | |
125 | (pop address))) | |
126 | ;; Kludge to search MISC as well. But not in "news". | |
127 | (unless (string= directory "news") | |
128 | (when (setq result (gnus-picon-find-image | |
129 | (concat base "/MISC/" user "/"))) | |
130 | (throw 'found result)))))))) | |
131 | ||
132 | (defun gnus-picon-find-image (directory) | |
133 | (let ((types gnus-picon-file-types) | |
134 | found type file) | |
135 | (while (and (not found) | |
136 | (setq type (pop types))) | |
137 | (setq found (file-exists-p (setq file (concat directory "face." type))))) | |
138 | (if found | |
139 | file | |
140 | nil))) | |
141 | ||
142 | (defun gnus-picon-insert-glyph (glyph category) | |
143 | "Insert GLYPH into the buffer. | |
144 | GLYPH can be either a glyph or a string." | |
145 | (if (stringp glyph) | |
146 | (insert glyph) | |
147 | (gnus-add-wash-type category) | |
148 | (gnus-add-image category (car glyph)) | |
149 | (gnus-put-image (car glyph) (cdr glyph) category))) | |
150 | ||
151 | (defun gnus-picon-create-glyph (file) | |
152 | (or (cdr (assoc file gnus-picon-glyph-alist)) | |
153 | (cdar (push (cons file (gnus-create-image file)) | |
154 | gnus-picon-glyph-alist)))) | |
155 | ||
156 | ;;; Functions that does picon transformations: | |
157 | ||
158 | (defun gnus-picon-transform-address (header category) | |
159 | (gnus-with-article-headers | |
160 | (let ((addresses | |
161 | (mail-header-parse-addresses | |
162 | ;; mail-header-parse-addresses does not work (reliably) on | |
163 | ;; decoded headers. | |
164 | (or | |
165 | (ignore-errors | |
166 | (mail-encode-encoded-word-string | |
167 | (or (mail-fetch-field header) ""))) | |
168 | (mail-fetch-field header)))) | |
169 | spec file point cache) | |
170 | (dolist (address addresses) | |
171 | (setq address (car address)) | |
172 | (when (and (stringp address) | |
173 | (setq spec (gnus-picon-split-address address))) | |
174 | (if (setq cache (cdr (assoc address gnus-picon-cache))) | |
175 | (setq spec cache) | |
176 | (when (setq file (or (gnus-picon-find-face | |
177 | address gnus-picon-user-directories) | |
178 | (gnus-picon-find-face | |
179 | (concat "unknown@" | |
180 | (mapconcat | |
181 | 'identity (cdr spec) ".")) | |
182 | gnus-picon-user-directories))) | |
183 | (setcar spec (cons (gnus-picon-create-glyph file) | |
184 | (car spec)))) | |
185 | ||
186 | (dotimes (i (1- (length spec))) | |
187 | (when (setq file (gnus-picon-find-face | |
188 | (concat "unknown@" | |
189 | (mapconcat | |
190 | 'identity (nthcdr (1+ i) spec) ".")) | |
191 | gnus-picon-domain-directories t)) | |
192 | (setcar (nthcdr (1+ i) spec) | |
193 | (cons (gnus-picon-create-glyph file) | |
194 | (nth (1+ i) spec))))) | |
195 | (setq spec (nreverse spec)) | |
196 | (push (cons address spec) gnus-picon-cache)) | |
197 | ||
198 | (gnus-article-goto-header header) | |
199 | (mail-header-narrow-to-field) | |
200 | (when (search-forward address nil t) | |
201 | (delete-region (match-beginning 0) (match-end 0)) | |
202 | (setq point (point)) | |
203 | (while spec | |
204 | (goto-char point) | |
205 | (if (> (length spec) 2) | |
206 | (insert ".") | |
207 | (if (= (length spec) 2) | |
208 | (insert "@"))) | |
209 | (gnus-picon-insert-glyph (pop spec) category)))))))) | |
210 | ||
211 | (defun gnus-picon-transform-newsgroups (header) | |
212 | (interactive) | |
213 | (gnus-with-article-headers | |
214 | (gnus-article-goto-header header) | |
215 | (mail-header-narrow-to-field) | |
216 | (let ((groups (message-tokenize-header (mail-fetch-field header))) | |
217 | spec file point) | |
218 | (dolist (group groups) | |
219 | (unless (setq spec (cdr (assoc group gnus-picon-cache))) | |
220 | (setq spec (nreverse (split-string group "[.]"))) | |
221 | (dotimes (i (length spec)) | |
222 | (when (setq file (gnus-picon-find-face | |
223 | (concat "unknown@" | |
224 | (mapconcat | |
225 | 'identity (nthcdr i spec) ".")) | |
226 | gnus-picon-news-directories t)) | |
227 | (setcar (nthcdr i spec) | |
228 | (cons (gnus-picon-create-glyph file) | |
229 | (nth i spec))))) | |
230 | (push (cons group spec) gnus-picon-cache)) | |
231 | (when (search-forward group nil t) | |
232 | (delete-region (match-beginning 0) (match-end 0)) | |
233 | (save-restriction | |
234 | (narrow-to-region (point) (point)) | |
235 | (while spec | |
236 | (goto-char (point-min)) | |
237 | (if (> (length spec) 1) | |
238 | (insert ".")) | |
239 | (gnus-picon-insert-glyph (pop spec) 'newsgroups-picon)) | |
240 | (goto-char (point-max)))))))) | |
241 | ||
242 | ;;; Commands: | |
243 | ||
244 | ;; #### NOTE: the test for buffer-read-only is the same as in | |
245 | ;; article-display-[x-]face. See the comment up there. | |
246 | ||
247 | ;;;###autoload | |
248 | (defun gnus-treat-from-picon () | |
249 | "Display picons in the From header. | |
250 | If picons are already displayed, remove them." | |
251 | (interactive) | |
252 | (let ((wash-picon-p buffer-read-only)) | |
253 | (gnus-with-article-buffer | |
254 | (if (and wash-picon-p (memq 'from-picon gnus-article-wash-types)) | |
255 | (gnus-delete-images 'from-picon) | |
256 | (gnus-picon-transform-address "from" 'from-picon))) | |
257 | )) | |
258 | ||
259 | ;;;###autoload | |
260 | (defun gnus-treat-mail-picon () | |
261 | "Display picons in the Cc and To headers. | |
262 | If picons are already displayed, remove them." | |
263 | (interactive) | |
264 | (let ((wash-picon-p buffer-read-only)) | |
265 | (gnus-with-article-buffer | |
266 | (if (and wash-picon-p (memq 'mail-picon gnus-article-wash-types)) | |
267 | (gnus-delete-images 'mail-picon) | |
268 | (gnus-picon-transform-address "cc" 'mail-picon) | |
269 | (gnus-picon-transform-address "to" 'mail-picon))) | |
270 | )) | |
271 | ||
272 | ;;;###autoload | |
273 | (defun gnus-treat-newsgroups-picon () | |
274 | "Display picons in the Newsgroups and Followup-To headers. | |
275 | If picons are already displayed, remove them." | |
276 | (interactive) | |
277 | (let ((wash-picon-p buffer-read-only)) | |
278 | (gnus-with-article-buffer | |
279 | (if (and wash-picon-p (memq 'newsgroups-picon gnus-article-wash-types)) | |
280 | (gnus-delete-images 'newsgroups-picon) | |
281 | (gnus-picon-transform-newsgroups "newsgroups") | |
282 | (gnus-picon-transform-newsgroups "followup-to"))) | |
283 | )) | |
284 | ||
285 | (provide 'gnus-picon) | |
286 | ||
287 | ;;; arch-tag: fe9aede0-1b1b-463a-b4ab-807f98bcb31f | |
288 | ;;; gnus-picon.el ends here |