1 ;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
4 ;; 2004, 2005 Free Software Foundation, Inc.
6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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 2, or (at your option)
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; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
34 ;;; Function aliases later to be redefined for XEmacs usage.
36 (defvar gnus-mouse-2 [mouse-2])
37 (defvar gnus-down-mouse-3 [down-mouse-3])
38 (defvar gnus-down-mouse-2 [down-mouse-2])
39 (defvar gnus-widget-button-keymap nil)
40 (defvar gnus-mode-line-modified
41 (if (featurep 'xemacs)
46 (autoload 'gnus-xmas-define "gnus-xmas")
47 (autoload 'gnus-xmas-redefine "gnus-xmas")
48 (autoload 'gnus-get-buffer-create "gnus")
49 (autoload 'nnheader-find-etc-directory "nnheader"))
51 (autoload 'smiley-region "smiley")
53 (defun gnus-kill-all-overlays ()
54 "Delete all overlays in the current buffer."
55 (let* ((overlayss (overlay-lists))
56 (buffer-read-only nil)
57 (overlays (delq nil (nconc (car overlayss) (cdr overlayss)))))
59 (delete-overlay (pop overlays)))))
63 (defun gnus-mule-max-width-function (el max-width)
64 `(let* ((val (eval (, el)))
65 (valstr (if (numberp val)
66 (int-to-string val) val)))
67 (if (> (length valstr) ,max-width)
68 (truncate-string-to-width valstr ,max-width)
72 (if (featurep 'xemacs)
74 (defvar gnus-mouse-face-prop 'mouse-face
75 "Property used for highlighting mouse regions.")))
78 (defvar gnus-tmp-unread)
79 (defvar gnus-tmp-replied)
80 (defvar gnus-tmp-score-char)
81 (defvar gnus-tmp-indentation)
82 (defvar gnus-tmp-opening-bracket)
83 (defvar gnus-tmp-lines)
84 (defvar gnus-tmp-name)
85 (defvar gnus-tmp-closing-bracket)
86 (defvar gnus-tmp-subject-or-nil)
87 (defvar gnus-check-before-posting)
88 (defvar gnus-mouse-face)
89 (defvar gnus-group-buffer))
91 (defun gnus-ems-redefine ()
97 ;; Mule and new Emacs definitions
99 ;; [Note] Now there are three kinds of mule implementations,
100 ;; original MULE, XEmacs/mule and Emacs 20+ including
101 ;; MULE features. Unfortunately these APIs are different. In
102 ;; particular, Emacs (including original Mule) and XEmacs are
103 ;; quite different. However, this version of Gnus doesn't support
104 ;; anything other than XEmacs 20+ and Emacs 20.3+.
106 ;; Predicates to check are following:
107 ;; (boundp 'MULE) is t only if Mule (original; anything older than
108 ;; Mule 2.3) is running.
109 ;; (featurep 'mule) is t when other mule variants are running.
111 ;; It is possible to detect XEmacs/mule by (featurep 'mule) and
112 ;; (featurep 'xemacs). In this case, the implementation for
113 ;; XEmacs/mule may be shareable between XEmacs and XEmacs/mule.
115 (defvar gnus-summary-display-table nil
116 "Display table used in summary mode buffers.")
117 (defalias 'gnus-max-width-function 'gnus-mule-max-width-function)
119 (when (boundp 'gnus-check-before-posting)
120 (setq gnus-check-before-posting
122 (delq 'control-chars gnus-check-before-posting))))
124 (defun gnus-summary-line-format-spec ()
125 (insert gnus-tmp-unread gnus-tmp-replied
126 gnus-tmp-score-char gnus-tmp-indentation)
131 gnus-tmp-opening-bracket
134 (if (> (length gnus-tmp-name) 20)
135 (truncate-string-to-width gnus-tmp-name 20)
137 gnus-tmp-closing-bracket)
139 gnus-mouse-face-prop gnus-mouse-face)
140 (insert " " gnus-tmp-subject-or-nil "\n")))))
142 ;; Clone of `appt-select-lowest-window' in appt.el.
143 (defun gnus-select-lowest-window ()
144 "Select the lowest window on the frame."
145 (let ((lowest-window (selected-window))
146 (bottom-edge (nth 3 (window-edges))))
147 (walk-windows (lambda (w)
148 (let ((next-bottom-edge (nth 3 (window-edges w))))
149 (when (< bottom-edge next-bottom-edge)
150 (setq bottom-edge next-bottom-edge
152 (select-window lowest-window)))
154 (defun gnus-region-active-p ()
155 "Say whether the region is active."
156 (and (boundp 'transient-mark-mode)
158 (boundp 'mark-active)
161 (defun gnus-mark-active-p ()
162 "Non-nil means the mark and region are currently active in this buffer."
163 mark-active) ; aliased to region-exists-p in XEmacs.
165 (defun gnus-x-splash ()
166 "Show a splash screen using a pixmap in the current buffer."
167 (let ((dir (nnheader-find-etc-directory "gnus"))
168 pixmap file height beg i)
170 (switch-to-buffer (gnus-get-buffer-create gnus-group-buffer))
171 (let ((buffer-read-only nil)
175 (file-exists-p (setq file
176 (expand-file-name "x-splash" dir))))
177 (let ((coding-system-for-read 'raw-text)
178 default-enable-multibyte-characters)
180 (insert-file-contents file)
181 (goto-char (point-min))
183 (setq pixmap (read (current-buffer)))))))
185 (make-face 'gnus-splash)
186 (setq height (/ (car pixmap) (frame-char-height))
187 width (/ (cadr pixmap) (frame-char-width)))
188 (set-face-foreground 'gnus-splash "Brown")
189 (set-face-stipple 'gnus-splash pixmap)
190 (insert-char ?\n (* (/ (window-height) 2 height) height))
193 (insert-char ?\ (* (/ (window-width) 2 width) width))
195 (insert-char ?\ width)
196 (set-text-properties beg (point) '(face gnus-splash))
199 (goto-char (point-min))
204 (defun gnus-image-type-available-p (type)
205 (and (fboundp 'image-type-available-p)
206 (image-type-available-p type)))
208 (defun gnus-create-image (file &optional type data-p &rest props)
209 (let ((face (plist-get props :face)))
211 (setq props (plist-put props :foreground (face-foreground face)))
212 (setq props (plist-put props :background (face-background face))))
213 (apply 'create-image file type data-p props)))
215 (defun gnus-put-image (glyph &optional string category)
216 (let ((point (point)))
217 (insert-image glyph (or string " "))
218 (put-text-property point (point) 'gnus-image-category category)
220 (put-text-property (1- (point)) (point)
221 'gnus-image-text-deletable t))
224 (defun gnus-remove-image (image &optional category)
225 "Remove the image matching IMAGE and CATEGORY found first."
226 (let ((start (point-min))
228 (while (and (not end)
229 (or (setq val (get-text-property start 'display))
231 (next-single-property-change start 'display))
232 (setq val (get-text-property start 'display)))))
233 (setq end (or (next-single-property-change start 'display)
235 (if (and (equal val image)
236 (equal (get-text-property start 'gnus-image-category)
239 (put-text-property start end 'display nil)
240 (when (get-text-property start 'gnus-image-text-deletable)
241 (delete-region start end)))
242 (unless (= end (point-max))
248 ;;; arch-tag: e7360b45-14b5-4171-aa39-69a44aed3cdb
249 ;;; gnus-ems.el ends here