+;;; riece-unread.el --- "unread message mark" add-on
+;; Copyright (C) 1998-2003 Daiki Ueno
+
+;; Author: Daiki Ueno <ueno@unixuser.org>
+;; Keywords: IRC, riece
+
+;; This file is part of Riece.
+
+;; This program 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.
+
+;; This program 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:
+
+;; This add-on displays unread mark ("!") for channels which have
+;; "unread messages".
+
+;; To use, add the following line to your ~/.riece/init.el:
+;; (add-to-list 'riece-addons 'riece-unread t)
+
+;;; Code:
+
+(eval-when-compile (require 'riece-message))
+
+(defvar riece-unread-channels nil)
+
+(defun riece-unread-display-message-function (message)
+ (unless (or (riece-message-own-p message)
+ (equal (riece-message-target message) riece-current-channel))
+ (add-to-list 'riece-unread-channels
+ (riece-message-target message))
+ (riece-unread-update-channel-list-buffer)))
+
+(defun riece-unread-channel-switch-hook ()
+ (setq riece-unread-channels
+ (delete riece-current-channel
+ riece-unread-channels))
+ (riece-unread-update-channel-list-buffer))
+
+(defun riece-unread-update-channel-list-buffer ()
+ (if riece-channel-list-buffer-mode
+ (save-excursion
+ (set-buffer riece-channel-list-buffer)
+ (let ((inhibit-read-only t)
+ buffer-read-only)
+ (goto-char (point-min))
+ (while (not (eobp))
+ (if (looking-at "\\( ?[0-9]+:\\)\\([ !]\\)\\(.+\\)")
+ (let ((channel (match-string 3)))
+ (replace-match
+ (concat "\\1"
+ (if (member channel riece-unread-channels)
+ "!"
+ " ")
+ "\\3"))))
+ (forward-line))))))
+
+(defun riece-unread-insinuate ()
+ (add-hook 'riece-after-display-message-functions
+ 'riece-unread-display-message-function)
+ (add-hook 'riece-channel-switch-hook
+ 'riece-unread-channel-switch-hook)
+ (add-hook 'riece-update-buffers-hook
+ 'riece-unread-update-channel-list-buffer))
+
+(provide 'riece-unread)
+
+;;; riece-unread.el ends here