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;;; gnus-ems.el --- functions for making Gnus work under different Emacsen
;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000
;; Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; 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"))
(if (featurep 'xemacs)
(autoload 'gnus-smiley-display "smiley")
(autoload 'gnus-smiley-display "smiley-ems") ; override XEmacs version
)
(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
(if (featurep 'xemacs)
(gnus-xmas-define)
(defvar gnus-mouse-face-prop 'mouse-face
"Property used for highlighting mouse regions.")))
(eval-and-compile
(let ((case-fold-search t))
(cond
((string-match "windows-nt\\|os/2\\|emx\\|cygwin32"
(symbol-name system-type))
(setq nnheader-file-name-translation-alist
(append nnheader-file-name-translation-alist
(mapcar (lambda (c) (cons c ?_))
'(?: ?* ?\" ?< ?> ??))
'((?+ . ?-))))))))
(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)
(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 API are different. In
;; particular, Emacs (including original MULE) and XEmacs are
;; quite different. Howvere, 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 every mule variants are running.
;; It is possible to detect XEmacs/mule by (featurep 'mule) and
;; checking `emacs-version'. 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))
(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))))
(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))))))
(defvar gnus-article-xface-ring-internal nil
"Cache for face data.")
;; Worth customizing?
(defvar gnus-article-xface-ring-size 6
"Length of the ring used for `gnus-article-xface-ring-internal'.")
(defvar gnus-article-compface-xbm
(eq 0 (string-match "#define" (shell-command-to-string "uncompface -X")))
"Non-nil means the compface program supports the -X option.
That produces XBM output.")
(defun gnus-article-display-xface (beg end)
"Display an XFace header from between BEG and END in the current article.
Requires support for images in your Emacs and the external programs
`uncompface', and `icontopbm'. On a GNU/Linux system these
might be in packages with names like `compface' or `faces-xface' and
`netpbm' or `libgr-progs', for instance. See also
`gnus-article-compface-xbm'.
This function is for Emacs 21+. See `gnus-xmas-article-display-xface'
for XEmacs."
;; It might be worth converting uncompface's output in Lisp.
(when (if (fboundp 'display-graphic-p)
(display-graphic-p))
(unless gnus-article-xface-ring-internal ; Only load ring when needed.
(setq gnus-article-xface-ring-internal
(make-ring gnus-article-xface-ring-size)))
(save-excursion
(let* ((cur (current-buffer))
(data (buffer-substring beg end))
(image (cdr-safe (assoc data (ring-elements
gnus-article-xface-ring-internal))))
default-enable-multibyte-characters)
(unless image
(with-temp-buffer
(insert data)
(and (eq 0 (apply #'call-process-region (point-min) (point-max)
"uncompface"
'delete '(t nil) nil
(if gnus-article-compface-xbm
'("-X"))))
(if gnus-article-compface-xbm
t
(goto-char (point-min))
(progn (insert "/* Width=48, Height=48 */\n") t)
(eq 0 (call-process-region (point-min) (point-max)
"icontopbm"
'delete '(t nil))))
;; Miles Bader says that faces don't look right as
;; light on dark.
(if (eq 'dark (cdr-safe (assq 'background-mode
(frame-parameters))))
(setq image (create-image (buffer-string)
(if gnus-article-compface-xbm
'xbm
'pbm)
t
:ascent 'center
:foreground "black"
:background "white"))
(setq image (create-image (buffer-string)
(if gnus-article-compface-xbm
'xbm
'pbm)
t
:ascent 'center)))))
(ring-insert gnus-article-xface-ring-internal (cons data image)))
(when image
(goto-char (point-min))
(re-search-forward "^From:" nil 'move)
(while (get-text-property (point) 'display)
(goto-char (next-single-property-change (point) 'display)))
(insert-image image))))))
(provide 'gnus-ems)
;;; gnus-ems.el ends here
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