[Emacs-diffs] Changes to emacs/lisp/gnus/gnus-ems.el [gnus-5_10-branch]

[Andreas Schwab]

Index: emacs/lisp/gnus/gnus-ems.el
diff -c /dev/null emacs/lisp/gnus/gnus-ems.el:1.17.2.1
*** /dev/null   Thu Jul 22 16:46:17 2004
--- emacs/lisp/gnus/gnus-ems.el Thu Jul 22 16:45:47 2004
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*** 0 ****
--- 1,243 ----
+ ;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
+ ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
+ ;;        Free Software Foundation, Inc.
+ 
+ ;; Author: Lars Magne Ingebrigtsen <address@hidden>
+ ;; Keywords: news
+ 
+ ;; This file is part of GNU Emacs.
+ 
+ ;; GNU Emacs is free software; you can redistribute it and/or modify
+ ;; it under the terms of the GNU General Public License as published by
+ ;; the Free Software Foundation; either version 2, or (at your option)
+ ;; any later version.
+ 
+ ;; GNU Emacs is distributed in the hope that it will be useful,
+ ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+ ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ ;; GNU General Public License for more details.
+ 
+ ;; You should have received a copy of the GNU General Public License
+ ;; along with GNU Emacs; see the file COPYING.  If not, write to the
+ ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ ;; Boston, MA 02111-1307, USA.
+ 
+ ;;; Commentary:
+ 
+ ;;; Code:
+ 
+ (eval-when-compile
+   (require 'cl)
+   (require 'ring))
+ 
+ ;;; Function aliases later to be redefined for XEmacs usage.
+ 
+ (defvar gnus-mouse-2 [mouse-2])
+ (defvar gnus-down-mouse-3 [down-mouse-3])
+ (defvar gnus-down-mouse-2 [down-mouse-2])
+ (defvar gnus-widget-button-keymap nil)
+ (defvar gnus-mode-line-modified
+   (if (or (featurep 'xemacs)
+         (< emacs-major-version 20))
+       '("--**-" . "-----")
+     '("**" "--")))
+ 
+ (eval-and-compile
+   (autoload 'gnus-xmas-define "gnus-xmas")
+   (autoload 'gnus-xmas-redefine "gnus-xmas")
+   (autoload 'appt-select-lowest-window "appt")
+   (autoload 'gnus-get-buffer-create "gnus")
+   (autoload 'nnheader-find-etc-directory "nnheader"))
+ 
+ (autoload 'smiley-region "smiley")
+ ;; Fixme: shouldn't require message
+ (autoload 'message-text-with-property "message")
+ 
+ (defun gnus-kill-all-overlays ()
+   "Delete all overlays in the current buffer."
+   (let* ((overlayss (overlay-lists))
+        (buffer-read-only nil)
+        (overlays (delq nil (nconc (car overlayss) (cdr overlayss)))))
+     (while overlays
+       (delete-overlay (pop overlays)))))
+ 
+ ;;; Mule functions.
+ 
+ (defun gnus-mule-max-width-function (el max-width)
+   `(let* ((val (eval (, el)))
+         (valstr (if (numberp val)
+                     (int-to-string val) val)))
+      (if (> (length valstr) ,max-width)
+        (truncate-string-to-width valstr ,max-width)
+        valstr)))
+ 
+ (eval-and-compile
+   (defalias 'gnus-char-width
+     (if (fboundp 'char-width)
+       'char-width
+       (lambda (ch) 1)))) ;; A simple hack.
+ 
+ (eval-and-compile
+   (if (featurep 'xemacs)
+       (gnus-xmas-define)
+     (defvar gnus-mouse-face-prop 'mouse-face
+       "Property used for highlighting mouse regions.")))
+ 
+ (eval-when-compile
+   (defvar gnus-tmp-unread)
+   (defvar gnus-tmp-replied)
+   (defvar gnus-tmp-score-char)
+   (defvar gnus-tmp-indentation)
+   (defvar gnus-tmp-opening-bracket)
+   (defvar gnus-tmp-lines)
+   (defvar gnus-tmp-name)
+   (defvar gnus-tmp-closing-bracket)
+   (defvar gnus-tmp-subject-or-nil)
+   (defvar gnus-check-before-posting)
+   (defvar gnus-mouse-face)
+   (defvar gnus-group-buffer))
+ 
+ (defun gnus-ems-redefine ()
+   (cond
+    ((featurep 'xemacs)
+     (gnus-xmas-redefine))
+ 
+    ((featurep 'mule)
+     ;; Mule and new Emacs definitions
+ 
+     ;; [Note] Now there are three kinds of mule implementations,
+     ;; original MULE, XEmacs/mule and Emacs 20+ including
+     ;; MULE features.  Unfortunately these APIs are different.  In
+     ;; particular, Emacs (including original Mule) and XEmacs are
+     ;; quite different.  However, this version of Gnus doesn't support
+     ;; anything other than XEmacs 20+ and Emacs 20.3+.
+ 
+     ;; Predicates to check are following:
+     ;; (boundp 'MULE) is t only if Mule (original; anything older than
+     ;;                     Mule 2.3) is running.
+     ;; (featurep 'mule) is t when other mule variants are running.
+ 
+     ;; It is possible to detect XEmacs/mule by (featurep 'mule) and
+     ;; (featurep 'xemacs).  In this case, the implementation for
+     ;; XEmacs/mule may be shareable between XEmacs and XEmacs/mule.
+ 
+     (defvar gnus-summary-display-table nil
+       "Display table used in summary mode buffers.")
+     (defalias 'gnus-max-width-function 'gnus-mule-max-width-function)
+ 
+     (when (boundp 'gnus-check-before-posting)
+       (setq gnus-check-before-posting
+           (delq 'long-lines
+                 (delq 'control-chars gnus-check-before-posting))))
+ 
+     (defun gnus-summary-line-format-spec ()
+       (insert gnus-tmp-unread gnus-tmp-replied
+             gnus-tmp-score-char gnus-tmp-indentation)
+       (put-text-property
+        (point)
+        (progn
+        (insert
+         gnus-tmp-opening-bracket
+         (format "%4d: %-20s"
+                 gnus-tmp-lines
+                 (if (> (length gnus-tmp-name) 20)
+                     (truncate-string-to-width gnus-tmp-name 20)
+                   gnus-tmp-name))
+         gnus-tmp-closing-bracket)
+        (point))
+        gnus-mouse-face-prop gnus-mouse-face)
+       (insert " " gnus-tmp-subject-or-nil "\n")))))
+ 
+ (defun gnus-region-active-p ()
+   "Say whether the region is active."
+   (and (boundp 'transient-mark-mode)
+        transient-mark-mode
+        (boundp 'mark-active)
+        mark-active))
+ 
+ (defun gnus-mark-active-p ()
+   "Non-nil means the mark and region are currently active in this buffer."
+   mark-active) ; aliased to region-exists-p in XEmacs.
+ 
+ (if (fboundp 'add-minor-mode)
+     (defalias 'gnus-add-minor-mode 'add-minor-mode)
+   (defun gnus-add-minor-mode (mode name map &rest rest)
+     (set (make-local-variable mode) t)
+     (unless (assq mode minor-mode-alist)
+       (push `(,mode ,name) minor-mode-alist))
+     (unless (assq mode minor-mode-map-alist)
+       (push (cons mode map)
+           minor-mode-map-alist))))
+ 
+ (defun gnus-x-splash ()
+   "Show a splash screen using a pixmap in the current buffer."
+   (let ((dir (nnheader-find-etc-directory "gnus"))
+       pixmap file height beg i)
+     (save-excursion
+       (switch-to-buffer (gnus-get-buffer-create gnus-group-buffer))
+       (let ((buffer-read-only nil)
+           width height)
+       (erase-buffer)
+       (when (and dir
+                  (file-exists-p (setq file
+                                       (expand-file-name "x-splash" dir))))
+         (let ((coding-system-for-read 'raw-text)
+               default-enable-multibyte-characters)
+           (with-temp-buffer
+             (insert-file-contents file)
+             (goto-char (point-min))
+             (ignore-errors
+               (setq pixmap (read (current-buffer)))))))
+       (when pixmap
+         (make-face 'gnus-splash)
+         (setq height (/ (car pixmap) (frame-char-height))
+               width (/ (cadr pixmap) (frame-char-width)))
+         (set-face-foreground 'gnus-splash "Brown")
+         (set-face-stipple 'gnus-splash pixmap)
+         (insert-char ?\n (* (/ (window-height) 2 height) height))
+         (setq i height)
+         (while (> i 0)
+           (insert-char ?\  (* (/ (window-width) 2 width) width))
+           (setq beg (point))
+           (insert-char ?\  width)
+           (set-text-properties beg (point) '(face gnus-splash))
+           (insert ?\n)
+           (decf i))
+         (goto-char (point-min))
+         (sit-for 0))))))
+ 
+ ;;; Image functions.
+ 
+ (defun gnus-image-type-available-p (type)
+   (and (fboundp 'image-type-available-p)
+        (image-type-available-p type)))
+ 
+ (defun gnus-create-image (file &optional type data-p &rest props)
+   (let ((face (plist-get props :face)))
+     (when face
+       (setq props (plist-put props :foreground (face-foreground face)))
+       (setq props (plist-put props :background (face-background face))))
+     (apply 'create-image file type data-p props)))
+ 
+ (defun gnus-put-image (glyph &optional string category)
+   (let ((point (point)))
+     (insert-image glyph (or string " "))
+     (put-text-property point (point) 'gnus-image-category category)
+     (unless string
+       (put-text-property (1- (point)) (point)
+                        'gnus-image-text-deletable t))
+     glyph))
+ 
+ (defun gnus-remove-image (image &optional category)
+   (dolist (position (message-text-with-property 'display))
+     (when (and (equal (get-text-property position 'display) image)
+              (equal (get-text-property position 'gnus-image-category)
+                     category))
+       (put-text-property position (1+ position) 'display nil)
+       (when (get-text-property position 'gnus-image-text-deletable)
+       (delete-region position (1+ position))))))
+ 
+ (provide 'gnus-ems)
+ 
+ ;;; arch-tag: e7360b45-14b5-4171-aa39-69a44aed3cdb
+ ;;; gnus-ems.el ends here