1;;; gnus-ems.el --- functions for making Gnus work under different Emacsen 2 3;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 4;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 5 6;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> 7;; Keywords: news 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 23;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 24;; Boston, MA 02110-1301, USA. 25 26;;; Commentary: 27 28;;; Code: 29 30(eval-when-compile 31 (require 'cl) 32 (require 'ring)) 33 34;;; Function aliases later to be redefined for XEmacs usage. 35 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 (or (featurep 'xemacs) 42 (< emacs-major-version 20)) 43 '("--**-" . "-----") 44 '("**" "--"))) 45 46(eval-and-compile 47 (autoload 'gnus-xmas-define "gnus-xmas") 48 (autoload 'gnus-xmas-redefine "gnus-xmas") 49 (autoload 'appt-select-lowest-window "appt") 50 (autoload 'gnus-get-buffer-create "gnus") 51 (autoload 'nnheader-find-etc-directory "nnheader")) 52 53(autoload 'smiley-region "smiley") 54;; Fixme: shouldn't require message 55(autoload 'message-text-with-property "message") 56 57(defun gnus-kill-all-overlays () 58 "Delete all overlays in the current buffer." 59 (let* ((overlayss (overlay-lists)) 60 (buffer-read-only nil) 61 (overlays (delq nil (nconc (car overlayss) (cdr overlayss))))) 62 (while overlays 63 (delete-overlay (pop overlays))))) 64 65;;; Mule functions. 66 67(defun gnus-mule-max-width-function (el max-width) 68 `(let* ((val (eval (, el))) 69 (valstr (if (numberp val) 70 (int-to-string val) val))) 71 (if (> (length valstr) ,max-width) 72 (truncate-string-to-width valstr ,max-width) 73 valstr))) 74 75(eval-and-compile 76 (defalias 'gnus-char-width 77 (if (fboundp 'char-width) 78 'char-width 79 (lambda (ch) 1)))) ;; A simple hack. 80 81(eval-and-compile 82 (if (featurep 'xemacs) 83 (gnus-xmas-define) 84 (defvar gnus-mouse-face-prop 'mouse-face 85 "Property used for highlighting mouse regions."))) 86 87(eval-when-compile 88 (defvar gnus-tmp-unread) 89 (defvar gnus-tmp-replied) 90 (defvar gnus-tmp-score-char) 91 (defvar gnus-tmp-indentation) 92 (defvar gnus-tmp-opening-bracket) 93 (defvar gnus-tmp-lines) 94 (defvar gnus-tmp-name) 95 (defvar gnus-tmp-closing-bracket) 96 (defvar gnus-tmp-subject-or-nil) 97 (defvar gnus-check-before-posting) 98 (defvar gnus-mouse-face) 99 (defvar gnus-group-buffer)) 100 101(defun gnus-ems-redefine () 102 (cond 103 ((featurep 'xemacs) 104 (gnus-xmas-redefine)) 105 106 ((featurep 'mule) 107 ;; Mule and new Emacs definitions 108 109 ;; [Note] Now there are three kinds of mule implementations, 110 ;; original MULE, XEmacs/mule and Emacs 20+ including 111 ;; MULE features. Unfortunately these APIs are different. In 112 ;; particular, Emacs (including original Mule) and XEmacs are 113 ;; quite different. However, this version of Gnus doesn't support 114 ;; anything other than XEmacs 20+ and Emacs 20.3+. 115 116 ;; Predicates to check are following: 117 ;; (boundp 'MULE) is t only if Mule (original; anything older than 118 ;; Mule 2.3) is running. 119 ;; (featurep 'mule) is t when other mule variants are running. 120 121 ;; It is possible to detect XEmacs/mule by (featurep 'mule) and 122 ;; (featurep 'xemacs). In this case, the implementation for 123 ;; XEmacs/mule may be shareable between XEmacs and XEmacs/mule. 124 125 (defvar gnus-summary-display-table nil 126 "Display table used in summary mode buffers.") 127 (defalias 'gnus-max-width-function 'gnus-mule-max-width-function) 128 129 (when (boundp 'gnus-check-before-posting) 130 (setq gnus-check-before-posting 131 (delq 'long-lines 132 (delq 'control-chars gnus-check-before-posting)))) 133 134 (defun gnus-summary-line-format-spec () 135 (insert gnus-tmp-unread gnus-tmp-replied 136 gnus-tmp-score-char gnus-tmp-indentation) 137 (put-text-property 138 (point) 139 (progn 140 (insert 141 gnus-tmp-opening-bracket 142 (format "%4d: %-20s" 143 gnus-tmp-lines 144 (if (> (length gnus-tmp-name) 20) 145 (truncate-string-to-width gnus-tmp-name 20) 146 gnus-tmp-name)) 147 gnus-tmp-closing-bracket) 148 (point)) 149 gnus-mouse-face-prop gnus-mouse-face) 150 (insert " " gnus-tmp-subject-or-nil "\n"))))) 151 152(defun gnus-region-active-p () 153 "Say whether the region is active." 154 (and (boundp 'transient-mark-mode) 155 transient-mark-mode 156 (boundp 'mark-active) 157 mark-active)) 158 159(defun gnus-mark-active-p () 160 "Non-nil means the mark and region are currently active in this buffer." 161 mark-active) ; aliased to region-exists-p in XEmacs. 162 163(if (fboundp 'add-minor-mode) 164 (defalias 'gnus-add-minor-mode 'add-minor-mode) 165 (defun gnus-add-minor-mode (mode name map &rest rest) 166 (set (make-local-variable mode) t) 167 (unless (assq mode minor-mode-alist) 168 (push `(,mode ,name) minor-mode-alist)) 169 (unless (assq mode minor-mode-map-alist) 170 (push (cons mode map) 171 minor-mode-map-alist)))) 172 173(defun gnus-x-splash () 174 "Show a splash screen using a pixmap in the current buffer." 175 (let ((dir (nnheader-find-etc-directory "gnus")) 176 pixmap file height beg i) 177 (save-excursion 178 (switch-to-buffer (gnus-get-buffer-create gnus-group-buffer)) 179 (let ((buffer-read-only nil) 180 width height) 181 (erase-buffer) 182 (when (and dir 183 (file-exists-p (setq file 184 (expand-file-name "x-splash" dir)))) 185 (let ((coding-system-for-read 'raw-text) 186 default-enable-multibyte-characters) 187 (with-temp-buffer 188 (insert-file-contents file) 189 (goto-char (point-min)) 190 (ignore-errors 191 (setq pixmap (read (current-buffer))))))) 192 (when pixmap 193 (make-face 'gnus-splash) 194 (setq height (/ (car pixmap) (frame-char-height)) 195 width (/ (cadr pixmap) (frame-char-width))) 196 (set-face-foreground 'gnus-splash "Brown") 197 (set-face-stipple 'gnus-splash pixmap) 198 (insert-char ?\n (* (/ (window-height) 2 height) height)) 199 (setq i height) 200 (while (> i 0) 201 (insert-char ?\ (* (/ (window-width) 2 width) width)) 202 (setq beg (point)) 203 (insert-char ?\ width) 204 (set-text-properties beg (point) '(face gnus-splash)) 205 (insert ?\n) 206 (decf i)) 207 (goto-char (point-min)) 208 (sit-for 0)))))) 209 210;;; Image functions. 211 212(defun gnus-image-type-available-p (type) 213 (and (fboundp 'image-type-available-p) 214 (image-type-available-p type) 215 (if (fboundp 'display-images-p) 216 (display-images-p) 217 t))) 218 219(defun gnus-create-image (file &optional type data-p &rest props) 220 (let ((face (plist-get props :face))) 221 (when face 222 (setq props (plist-put props :foreground (face-foreground face))) 223 (setq props (plist-put props :background (face-background face)))) 224 (apply 'create-image file type data-p props))) 225 226(defun gnus-put-image (glyph &optional string category) 227 (let ((point (point))) 228 (insert-image glyph (or string " ")) 229 (put-text-property point (point) 'gnus-image-category category) 230 (unless string 231 (put-text-property (1- (point)) (point) 232 'gnus-image-text-deletable t)) 233 glyph)) 234 235(defun gnus-remove-image (image &optional category) 236 (dolist (position (message-text-with-property 'display)) 237 (when (and (equal (get-text-property position 'display) image) 238 (equal (get-text-property position 'gnus-image-category) 239 category)) 240 (put-text-property position (1+ position) 'display nil) 241 (when (get-text-property position 'gnus-image-text-deletable) 242 (delete-region position (1+ position)))))) 243 244(provide 'gnus-ems) 245 246;;; arch-tag: e7360b45-14b5-4171-aa39-69a44aed3cdb 247;;; gnus-ems.el ends here 248