1 ;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
2 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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")
49 (autoload 'gnus-get-buffer-create "gnus")
50 (autoload 'nnheader-find-etc-directory "nnheader"))
52 (autoload 'smiley-region "smiley")
53 ;; Fixme: shouldn't require message
54 (autoload 'message-text-with-property "message")
56 (defun gnus-kill-all-overlays ()
57 "Delete all overlays in the current buffer."
58 (let* ((overlayss (overlay-lists))
59 (buffer-read-only nil)
60 (overlays (delq nil (nconc (car overlayss) (cdr overlayss)))))
62 (delete-overlay (pop overlays)))))
66 (defun gnus-mule-max-width-function (el max-width)
67 `(let* ((val (eval (, el)))
68 (valstr (if (numberp val)
69 (int-to-string val) val)))
70 (if (> (length valstr) ,max-width)
71 (truncate-string-to-width valstr ,max-width)
75 (defalias 'gnus-char-width
76 (if (fboundp 'char-width)
78 (lambda (ch) 1)))) ;; A simple hack.
81 (if (featurep 'xemacs)
83 (defvar gnus-mouse-face-prop 'mouse-face
84 "Property used for highlighting mouse regions.")))
87 (defvar gnus-tmp-unread)
88 (defvar gnus-tmp-replied)
89 (defvar gnus-tmp-score-char)
90 (defvar gnus-tmp-indentation)
91 (defvar gnus-tmp-opening-bracket)
92 (defvar gnus-tmp-lines)
93 (defvar gnus-tmp-name)
94 (defvar gnus-tmp-closing-bracket)
95 (defvar gnus-tmp-subject-or-nil)
96 (defvar gnus-check-before-posting)
97 (defvar gnus-mouse-face)
98 (defvar gnus-group-buffer))
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 APIs are different. In
111 ;; particular, Emacs (including original Mule) and XEmacs are
112 ;; quite different. However, 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 other mule variants are running.
120 ;; It is possible to detect XEmacs/mule by (featurep 'mule) and
121 ;; (featurep 'xemacs). 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)
128 (when (boundp 'gnus-check-before-posting)
129 (setq gnus-check-before-posting
131 (delq 'control-chars gnus-check-before-posting))))
133 (defun gnus-summary-line-format-spec ()
134 (insert gnus-tmp-unread gnus-tmp-replied
135 gnus-tmp-score-char gnus-tmp-indentation)
140 gnus-tmp-opening-bracket
143 (if (> (length gnus-tmp-name) 20)
144 (truncate-string-to-width gnus-tmp-name 20)
146 gnus-tmp-closing-bracket)
148 gnus-mouse-face-prop gnus-mouse-face)
149 (insert " " gnus-tmp-subject-or-nil "\n")))))
151 (defun gnus-region-active-p ()
152 "Say whether the region is active."
153 (and (boundp 'transient-mark-mode)
155 (boundp 'mark-active)
158 (defun gnus-mark-active-p ()
159 "Non-nil means the mark and region are currently active in this buffer."
160 mark-active) ; aliased to region-exists-p in XEmacs.
162 (if (fboundp 'add-minor-mode)
163 (defalias 'gnus-add-minor-mode 'add-minor-mode)
164 (defun gnus-add-minor-mode (mode name map &rest rest)
165 (set (make-local-variable mode) t)
166 (unless (assq mode minor-mode-alist)
167 (push `(,mode ,name) minor-mode-alist))
168 (unless (assq mode minor-mode-map-alist)
169 (push (cons mode map)
170 minor-mode-map-alist))))
172 (defun gnus-x-splash ()
173 "Show a splash screen using a pixmap in the current buffer."
174 (let ((dir (nnheader-find-etc-directory "gnus"))
175 pixmap file height beg i)
177 (switch-to-buffer (gnus-get-buffer-create gnus-group-buffer))
178 (let ((buffer-read-only nil)
182 (file-exists-p (setq file
183 (expand-file-name "x-splash" dir))))
184 (let ((coding-system-for-read 'raw-text)
185 default-enable-multibyte-characters)
187 (insert-file-contents file)
188 (goto-char (point-min))
190 (setq pixmap (read (current-buffer)))))))
192 (make-face 'gnus-splash)
193 (setq height (/ (car pixmap) (frame-char-height))
194 width (/ (cadr pixmap) (frame-char-width)))
195 (set-face-foreground 'gnus-splash "Brown")
196 (set-face-stipple 'gnus-splash pixmap)
197 (insert-char ?\n (* (/ (window-height) 2 height) height))
200 (insert-char ?\ (* (/ (window-width) 2 width) width))
202 (insert-char ?\ width)
203 (set-text-properties beg (point) '(face gnus-splash))
206 (goto-char (point-min))
211 (defun gnus-image-type-available-p (type)
212 (and (fboundp 'image-type-available-p)
213 (image-type-available-p type)))
215 (defun gnus-create-image (file &optional type data-p &rest props)
216 (let ((face (plist-get props :face)))
218 (setq props (plist-put props :foreground (face-foreground face)))
219 (setq props (plist-put props :background (face-background face))))
220 (apply 'create-image file type data-p props)))
222 (defun gnus-put-image (glyph &optional string)
223 (insert-image glyph (or string " "))
225 (put-text-property (1- (point)) (point)
226 'gnus-image-text-deletable t))
229 (defun gnus-remove-image (image)
230 (dolist (position (message-text-with-property 'display))
231 (when (equal (get-text-property position 'display) image)
232 (put-text-property position (1+ position) 'display nil)
233 (when (get-text-property position 'gnus-image-text-deletable)
234 (delete-region position (1+ position))))))
238 ;;; gnus-ems.el ends here