1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
;;; jabber-muc-nick-coloring.el --- Add nick coloring abilyty to emacs-jabber -*- lexical-binding: t; -*-
;; 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:
(require 'color)
;;;;##########################################################################
;;;; 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-hsv-to-hsl (h s v)
"Convert color consisting of H, S and V to list of HSL values."
;; https://en.wikipedia.org/wiki/HSL_and_HSV#HSV_to_HSL
(let* ((hue h)
(luminance (* v (- 1 (/ s 2.0))))
(saturation (if (or (= luminance 0) (= luminance 1))
0
(/ (- v luminance) (min luminance (- 1 luminance))))))
(list hue saturation luminance)))
(defun jabber-muc-nick-gen-color (nick)
"Return a good enough color from the available pool."
(let* ((pool-index (mod (string-to-number (substring (md5 nick) 0 6) 16) 360))
(hue (/ pool-index 360.0))
(saturation jabber-muc-nick-saturation)
(value jabber-muc-nick-value)
(hsl (jabber-muc-nick-hsv-to-hsl hue saturation value)))
(apply #'color-rgb-to-hex (apply #'color-hsl-to-rgb hsl))))
(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
|
