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+;;; jabber-muc-nick-coloring.el --- Add nick coloring abilyty to emacs-jabber
+
+;; Copyright 2009, 2010, 2012, 2013 Terechkov Evgenii - evg@altlinux.org
+
+;; 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 this program; 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))	;for ignore-errors
+;; we need hexrgb-hsv-to-hex:
+(eval-and-compile
+  (or (ignore-errors (require 'hexrgb))
+      ;; jabber-fallback-lib/ from jabber/lisp/jabber-fallback-lib
+      (ignore-errors
+        (let ((load-path (cons (expand-file-name
+                                "jabber-fallback-lib"
+                                (file-name-directory (locate-library "jabber")))
+                               load-path)))
+          (require 'hexrgb)))
+      (error
+       "hexrgb not found in `load-path' or jabber-fallback-lib/ directory.")))
+
+;;;;##########################################################################
+;;;;  User Options, Variables
+;;;;##########################################################################
+
+(defcustom jabber-muc-participant-colors nil
+  "Alist of used colors. Format is (nick . color). Color may be
+  in #RGB or textual (like red or blue) notation. Colors will be
+  added in #RGB notation for unknown nicks."
+  :type '(alist :key-type string :value-type color)
+  :group 'jabber-chat)
+
+(defcustom jabber-muc-colorize-local nil
+  "Colorize MUC messages from you."
+  :type 'boolean
+  :group 'jabber-chat)
+
+(defcustom jabber-muc-colorize-foreign nil
+  "Colorize MUC messages not from you."
+  :type 'boolean
+  :group 'jabber-chat)
+
+(defcustom jabber-muc-nick-saturation 1.0
+  "Default saturation for nick coloring."
+  :type 'float
+  :group 'jabber-chat)
+
+(defcustom jabber-muc-nick-value 1.0
+  "Default value for nick coloring."
+  :type 'float
+  :group 'jabber-chat)
+
+(defun jabber-muc-nick-gen-color (nick)
+  "Return good enough color from available pool"
+  (let ((hue (/ (mod (string-to-number (substring (md5 nick) 0 6) 16) 360) 360.0)))
+    (hexrgb-hsv-to-hex hue jabber-muc-nick-saturation jabber-muc-nick-value)))
+
+(defun jabber-muc-nick-get-color (nick)
+  "Get NICKs color"
+  (let ((color (cdr (assoc nick jabber-muc-participant-colors))))
+    (if color
+        color
+      (progn
+        (unless jabber-muc-participant-colors )
+        (push (cons nick (jabber-muc-nick-gen-color nick)) jabber-muc-participant-colors)
+        (cdr (assoc nick jabber-muc-participant-colors))))))
+
+(provide 'jabber-muc-nick-coloring)
+
+;;; jabber-muc-nick-coloring.el ends here