+;;; riece-keyword.el --- highlight keywords in channel buffers
+;; Copyright (C) 1998-2003 Daiki Ueno
+
+;; Author: Daiki Ueno <ueno@unixuser.org>
+;; Created: 1998-09-28
+;; 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:
+
+;; To use, add the following line to your ~/.riece/init.el:
+;; (add-to-list 'riece-addons 'riece-keyword)
+
+;;; Code:
+
+(defgroup riece-keyword nil
+ "Highlight keyword in IRC buffer."
+ :group 'riece-vars)
+
+(defcustom riece-keywords nil
+ "Keywords to be highlightened."
+ :type '(repeat string)
+ :group 'riece-keyword)
+
+(defcustom riece-notify-keyword-functions nil
+ "Functions used to notify keyword match."
+ :type '(list function)
+ :group 'riece-keyword)
+
+(defface riece-keyword-face
+ '((((class color))
+ (:foreground "red" :underline t))
+ (t
+ ()))
+ "Face used for highlightening matching keyword."
+ :group 'riece-highlight-faces)
+(defvar riece-keyword-face 'riece-keyword-face)
+
+;;; The old XEmacs package doesn't have autoload setting for regexp-opt.
+(autoload 'regexp-opt "regexp-opt")
+(defun riece-keyword-message-filter (message)
+ (if riece-keywords
+ (let ((regexp (regexp-opt riece-keywords))
+ (index 0))
+ (while (string-match regexp (riece-message-text message) index)
+ (if (memq 'riece-highlight riece-addons)
+ (put-text-property (match-beginning 0) (match-end 0)
+ 'riece-keyword t
+ (riece-message-text message)))
+ (save-match-data
+ (run-hook-with-args 'riece-notify-keyword-functions
+ (match-string 0 (riece-message-text message))))
+ (setq index (match-end 0)))))
+ message)
+
+(defun riece-keyword-map-region (start end function)
+ (catch 'done
+ (while t
+ ;; Search for the beginning of the button region.
+ (unless (get-text-property start 'riece-keyword)
+ (setq start (next-single-property-change start 'riece-keyword
+ nil end)))
+ (if (= start end)
+ (throw 'done nil))
+ ;; Search for the end of the button region.
+ (let ((button-end (next-single-property-change start 'riece-keyword
+ nil end)))
+ (if (= button-end end)
+ (throw 'done nil))
+ (funcall function start button-end)
+ (setq start button-end)))))
+
+(defun riece-keyword-scan-region (start end)
+ (riece-keyword-map-region
+ start end
+ (lambda (start end)
+ (riece-overlay-put (riece-make-overlay start end)
+ 'face riece-keyword-face))))
+
+(defun riece-keyword-requires ()
+ (if (memq 'riece-highlight riece-addons)
+ '(riece-highlight)))
+
+(defun riece-keyword-insinuate ()
+ (add-hook 'riece-message-filter-functions 'riece-keyword-message-filter)
+ (add-hook 'riece-after-insert-functions 'riece-keyword-scan-region))
+
+(provide 'riece-keyword)
+
+;;; riece-keyword.el ends here
\ No newline at end of file
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