1 ;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
2 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
3 ;; 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 2, 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., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
33 ;;; Function aliases later to be redefined for XEmacs usage.
35 (defvar gnus-mouse-2 [mouse-2])
36 (defvar gnus-down-mouse-3 [down-mouse-3])
37 (defvar gnus-down-mouse-2 [down-mouse-2])
38 (defvar gnus-widget-button-keymap nil)
39 (defvar gnus-mode-line-modified
40 (if (or (featurep 'xemacs)
41 (< emacs-major-version 20))
46 (autoload 'gnus-xmas-define "gnus-xmas")
47 (autoload 'gnus-xmas-redefine "gnus-xmas")
48 (autoload 'appt-select-lowest-window "appt"))
50 (if (featurep 'xemacs)
51 (autoload 'gnus-smiley-display "smiley")
52 (autoload 'gnus-smiley-display "smiley-ems")) ; override XEmacs version
54 (defun gnus-kill-all-overlays ()
55 "Delete all overlays in the current buffer."
56 (let* ((overlayss (overlay-lists))
57 (buffer-read-only nil)
58 (overlays (delq nil (nconc (car overlayss) (cdr overlayss)))))
60 (delete-overlay (pop overlays)))))
64 (defun gnus-mule-max-width-function (el max-width)
65 `(let* ((val (eval (, el)))
66 (valstr (if (numberp val)
67 (int-to-string val) val)))
68 (if (> (length valstr) ,max-width)
69 (truncate-string-to-width valstr ,max-width)
73 (defalias 'gnus-char-width
74 (if (fboundp 'char-width)
76 (lambda (ch) 1)))) ;; A simple hack.
79 (if (featurep 'xemacs)
81 (defvar gnus-mouse-face-prop 'mouse-face
82 "Property used for highlighting mouse regions.")))
85 (let ((case-fold-search t))
87 ((string-match "windows-nt\\|os/2\\|emx\\|cygwin32"
88 (symbol-name system-type))
89 (setq nnheader-file-name-translation-alist
90 (append nnheader-file-name-translation-alist
91 (mapcar (lambda (c) (cons c ?_))
92 '(?: ?* ?\" ?< ?> ??))
93 (if (string-match "windows-nt\\|cygwin32"
94 (symbol-name system-type))
98 (defvar gnus-tmp-unread)
99 (defvar gnus-tmp-replied)
100 (defvar gnus-tmp-score-char)
101 (defvar gnus-tmp-indentation)
102 (defvar gnus-tmp-opening-bracket)
103 (defvar gnus-tmp-lines)
104 (defvar gnus-tmp-name)
105 (defvar gnus-tmp-closing-bracket)
106 (defvar gnus-tmp-subject-or-nil)
107 (defvar gnus-check-before-posting)
109 (defun gnus-ems-redefine ()
112 (gnus-xmas-redefine))
115 ;; Mule and new Emacs definitions
117 ;; [Note] Now there are three kinds of mule implementations,
118 ;; original MULE, XEmacs/mule and Emacs 20+ including
119 ;; MULE features. Unfortunately these API are different. In
120 ;; particular, Emacs (including original MULE) and XEmacs are
121 ;; quite different. Howvere, this version of Gnus doesn't support
122 ;; anything other than XEmacs 20+ and Emacs 20.3+.
124 ;; Predicates to check are following:
125 ;; (boundp 'MULE) is t only if MULE (original; anything older than
126 ;; Mule 2.3) is running.
127 ;; (featurep 'mule) is t when every mule variants are running.
129 ;; It is possible to detect XEmacs/mule by (featurep 'mule) and
130 ;; checking `emacs-version'. In this case, the implementation for
131 ;; XEmacs/mule may be shareable between XEmacs and XEmacs/mule.
133 (defvar gnus-summary-display-table nil
134 "Display table used in summary mode buffers.")
135 (defalias 'gnus-max-width-function 'gnus-mule-max-width-function)
137 (when (boundp 'gnus-check-before-posting)
138 (setq gnus-check-before-posting
140 (delq 'control-chars gnus-check-before-posting))))
142 (defun gnus-summary-line-format-spec ()
143 (insert gnus-tmp-unread gnus-tmp-replied
144 gnus-tmp-score-char gnus-tmp-indentation)
149 gnus-tmp-opening-bracket
152 (if (> (length gnus-tmp-name) 20)
153 (truncate-string-to-width gnus-tmp-name 20)
155 gnus-tmp-closing-bracket)
157 gnus-mouse-face-prop gnus-mouse-face)
158 (insert " " gnus-tmp-subject-or-nil "\n")))))
160 (defun gnus-region-active-p ()
161 "Say whether the region is active."
162 (and (boundp 'transient-mark-mode)
164 (boundp 'mark-active)
167 (if (fboundp 'add-minor-mode)
168 (defalias 'gnus-add-minor-mode 'add-minor-mode)
169 (defun gnus-add-minor-mode (mode name map &rest rest)
170 (set (make-local-variable mode) t)
171 (unless (assq mode minor-mode-alist)
172 (push `(,mode ,name) minor-mode-alist))
173 (unless (assq mode minor-mode-map-alist)
174 (push (cons mode map)
175 minor-mode-map-alist))))
177 (defun gnus-x-splash ()
178 "Show a splash screen using a pixmap in the current buffer."
179 (let ((dir (nnheader-find-etc-directory "gnus"))
180 pixmap file height beg i)
182 (switch-to-buffer (gnus-get-buffer-create gnus-group-buffer))
183 (let ((buffer-read-only nil)
187 (file-exists-p (setq file
188 (expand-file-name "x-splash" dir))))
190 (insert-file-contents file)
191 (goto-char (point-min))
193 (setq pixmap (read (current-buffer))))))
195 (make-face 'gnus-splash)
196 (setq height (/ (car pixmap) (frame-char-height))
197 width (/ (cadr pixmap) (frame-char-width)))
198 (set-face-foreground 'gnus-splash "Brown")
199 (set-face-stipple 'gnus-splash pixmap)
200 (insert-char ?\n (* (/ (window-height) 2 height) height))
203 (insert-char ?\ (* (/ (window-width) 2 width) width))
205 (insert-char ?\ width)
206 (set-text-properties beg (point) '(face gnus-splash))
209 (goto-char (point-min))
212 (defvar gnus-article-xface-ring-internal nil
213 "Cache for face data.")
215 ;; Worth customizing?
216 (defvar gnus-article-xface-ring-size 6
217 "Length of the ring used for `gnus-article-xface-ring-internal'.")
219 (defvar gnus-article-compface-xbm
221 (eq 0 (string-match "#define"
222 (shell-command-to-string "uncompface -X")))
224 "Non-nil means the compface program supports the -X option.
225 That produces XBM output.")
227 (defun gnus-article-display-xface (beg end &optional buffer)
228 "Display an XFace header from between BEG and END in BUFFER.
229 Requires support for images in your Emacs and the external programs
230 `uncompface', and `icontopbm'. On a GNU/Linux system these
231 might be in packages with names like `compface' or `faces-xface' and
232 `netpbm' or `libgr-progs', for instance. See also
233 `gnus-article-compface-xbm'.
235 This function is for Emacs 21+. See `gnus-xmas-article-display-xface'
237 ;; It might be worth converting uncompface's output in Lisp.
239 (when (if (fboundp 'display-graphic-p)
241 (unless gnus-article-xface-ring-internal ; Only load ring when needed.
242 (setq gnus-article-xface-ring-internal
243 (make-ring gnus-article-xface-ring-size)))
245 (let* ((cur (current-buffer))
247 (with-current-buffer buffer
248 (buffer-substring beg end))
249 (buffer-substring beg end)))
250 (image (cdr-safe (assoc data (ring-elements
251 gnus-article-xface-ring-internal))))
252 default-enable-multibyte-characters)
256 (and (eq 0 (apply #'call-process-region (point-min) (point-max)
259 (if gnus-article-compface-xbm
261 (if gnus-article-compface-xbm
263 (goto-char (point-min))
264 (progn (insert "/* Width=48, Height=48 */\n") t)
265 (eq 0 (call-process-region (point-min) (point-max)
268 ;; Miles Bader says that faces don't look right as
270 (if (eq 'dark (cdr-safe (assq 'background-mode
271 (frame-parameters))))
272 (setq image (create-image (buffer-string)
273 (if gnus-article-compface-xbm
279 :background "white"))
280 (setq image (create-image (buffer-string)
281 (if gnus-article-compface-xbm
286 (ring-insert gnus-article-xface-ring-internal (cons data image)))
288 (goto-char (point-min))
289 (re-search-forward "^From:" nil 'move)
290 (while (get-text-property (point) 'display)
291 (goto-char (next-single-property-change (point) 'display)))
292 (insert-image image))))))
296 ;;; gnus-ems.el ends here