1 ;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
2 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
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.
29 (eval-when-compile (require 'cl))
31 ;;; Function aliases later to be redefined for XEmacs usage.
34 (defvar gnus-xemacs (string-match "XEmacs" emacs-version)
35 "Non-nil if running under XEmacs."))
37 (defvar gnus-mouse-2 [mouse-2])
38 (defvar gnus-down-mouse-3 [down-mouse-3])
39 (defvar gnus-down-mouse-2 [down-mouse-2])
40 (defvar gnus-widget-button-keymap nil)
41 (defvar gnus-mode-line-modified
43 (< emacs-major-version 20))
48 (autoload 'gnus-xmas-define "gnus-xmas")
49 (autoload 'gnus-xmas-redefine "gnus-xmas")
50 (autoload 'appt-select-lowest-window "appt"))
54 (defun gnus-mule-max-width-function (el max-width)
55 `(let* ((val (eval (, el)))
56 (valstr (if (numberp val)
57 (int-to-string val) val)))
58 (if (> (length valstr) ,max-width)
59 (truncate-string-to-width valstr ,max-width)
65 (defvar gnus-mouse-face-prop 'mouse-face
66 "Property used for highlighting mouse regions.")))
71 (defun gnus-dummy-func (&rest args))
72 (let ((funcs '(mouse-set-point set-face-foreground
73 set-face-background x-popup-menu)))
75 (unless (fboundp (car funcs))
76 (defalias (car funcs) 'gnus-dummy-func))
77 (setq funcs (cdr funcs)))))))
80 (let ((case-fold-search t))
82 ((string-match "windows-nt\\|os/2\\|emx\\|cygwin32"
83 (symbol-name system-type))
84 (setq nnheader-file-name-translation-alist
85 (append nnheader-file-name-translation-alist
86 (mapcar (lambda (c) (cons c ?_))
87 '(?: ?* ?\" ?< ?> ??))
90 (defvar gnus-tmp-unread)
91 (defvar gnus-tmp-replied)
92 (defvar gnus-tmp-score-char)
93 (defvar gnus-tmp-indentation)
94 (defvar gnus-tmp-opening-bracket)
95 (defvar gnus-tmp-lines)
96 (defvar gnus-tmp-name)
97 (defvar gnus-tmp-closing-bracket)
98 (defvar gnus-tmp-subject-or-nil)
100 (defun gnus-ems-redefine ()
103 (gnus-xmas-redefine))
106 ;; Mule and new Emacs definitions
108 ;; [Note] Now there are three kinds of mule implementations,
109 ;; original MULE, XEmacs/mule and Emacs 20+ including
110 ;; MULE features. Unfortunately these API are different. In
111 ;; particular, Emacs (including original MULE) and XEmacs are
112 ;; quite different. Howvere, this version of Gnus doesn't support
113 ;; anything other than XEmacs 20+ and Emacs 20.3+.
115 ;; Predicates to check are following:
116 ;; (boundp 'MULE) is t only if MULE (original; anything older than
117 ;; Mule 2.3) is running.
118 ;; (featurep 'mule) is t when every mule variants are running.
120 ;; It is possible to detect XEmacs/mule by (featurep 'mule) and
121 ;; checking `emacs-version'. In this case, the implementation for
122 ;; XEmacs/mule may be shareable between XEmacs and XEmacs/mule.
124 (defvar gnus-summary-display-table nil
125 "Display table used in summary mode buffers.")
126 (defalias 'gnus-max-width-function 'gnus-mule-max-width-function)
127 (defalias 'gnus-summary-set-display-table (lambda ()))
129 (when (boundp 'gnus-check-before-posting)
130 (setq gnus-check-before-posting
132 (delq 'control-chars gnus-check-before-posting))))
134 (defun gnus-summary-line-format-spec ()
135 (insert gnus-tmp-unread gnus-tmp-replied
136 gnus-tmp-score-char gnus-tmp-indentation)
141 gnus-tmp-opening-bracket
144 (if (> (length gnus-tmp-name) 20)
145 (truncate-string-to-width gnus-tmp-name 20)
147 gnus-tmp-closing-bracket)
149 gnus-mouse-face-prop gnus-mouse-face)
150 (insert " " gnus-tmp-subject-or-nil "\n")))))
152 (defun gnus-region-active-p ()
153 "Say whether the region is active."
154 (and (boundp 'transient-mark-mode)
156 (boundp 'mark-active)
159 (if (fboundp 'add-minor-mode)
160 (defalias 'gnus-add-minor-mode 'add-minor-mode)
161 (defun gnus-add-minor-mode (mode name map)
162 (set (make-local-variable mode) t)
163 (unless (assq mode minor-mode-alist)
164 (push `(,mode ,name) minor-mode-alist))
165 (unless (assq mode minor-mode-map-alist)
166 (push (cons mode map)
167 minor-mode-map-alist))))
169 (defun gnus-x-splash ()
170 "Show a splash screen using a pixmap in the current buffer."
171 (let ((dir (nnheader-find-etc-directory "gnus"))
172 pixmap file height beg i)
174 (switch-to-buffer (gnus-get-buffer-create gnus-group-buffer))
175 (let ((buffer-read-only nil))
178 (file-exists-p (setq file (concat dir "x-splash"))))
180 (insert-file-contents file)
181 (goto-char (point-min))
183 (setq pixmap (read (current-buffer))))))
185 (unless (facep 'gnus-splash)
186 (make-face 'gnus-splash))
187 (setq height (/ (car pixmap) (frame-char-height))
188 width (/ (cadr pixmap) (frame-char-width)))
189 (set-face-foreground 'gnus-splash "Brown")
190 (set-face-stipple 'gnus-splash pixmap)
191 (insert-char ?\n (* (/ (window-height) 2 height) height))
194 (insert-char ? (* (/ (window-width) 2 width) width))
196 (insert-char ? width)
197 (set-text-properties beg (point) '(face gnus-splash))
200 (goto-char (point-min))
203 (defvar gnus-article-xface-ring-internal nil
204 "Cache for face data.")
206 ;; Worth customizing?
207 (defvar gnus-article-xface-ring-size 6
208 "Length of the ring used for `gnus-article-xface-ring-internal'.")
210 (defun gnus-article-display-xface (beg end)
211 "Display an XFace header from between BEG and END in the current article.
212 This requires support images in your Emacs and the external programs
213 `uncompface', `icontopbm' and `ppmtoxbm'. On a GNU/Linux system these
214 might be in packages with names like `compface' or `faces-xface' and
215 `netpbm' or `libgr-progs', for instance.
217 This function is for Emacs 21+. See `gnus-xmas-article-display-xface'
219 ;; It might be worth converting uncompface's output in Lisp.
221 (unless gnus-article-xface-ring-internal ; Only load ring when needed.
222 (setq gnus-article-xface-ring-internal
223 (make-ring gnus-article-xface-ring-size)))
225 (let* ((cur (current-buffer))
226 (data (buffer-substring beg end))
227 (image (cdr-safe (assoc data (ring-elements
228 gnus-article-xface-ring-internal)))))
229 (when (if (fboundp 'display-graphic-p)
232 (let ((coding-system-for-read 'binary)
233 (coding-system-for-write 'binary))
236 (and (eq 0 (call-process-region (point-min) (point-max)
239 (goto-char (point-min))
240 (progn (insert "/* Width=48, Height=48 */\n") t)
241 (eq 0 (call-process-region (point-min) (point-max)
244 (eq 0 (call-process-region (point-min) (point-max)
247 (setq image (create-image (buffer-string) 'xbm t)))))
248 (ring-insert gnus-article-xface-ring-internal (cons data image))))
250 (goto-char (point-min))
251 (re-search-forward "^From:" nil 'move)
252 (insert-image image)))))
257 ;; byte-compile-warnings: '(redefine callargs)
260 ;;; gnus-ems.el ends here