djavu-asus/elpa/jabber-20230715.456/jabber-muc-nick-coloring.el

   1 ;;; jabber-muc-nick-coloring.el --- Add nick coloring abilyty to emacs-jabber  -*- lexical-binding: t; -*-
   2
   3 ;; Copyright 2009, 2010, 2012, 2013 Terechkov Evgenii - evg@altlinux.org
   4
   5 ;; This program is free software; you can redistribute it and/or modify
   6 ;; it under the terms of the GNU General Public License as published by
   7 ;; the Free Software Foundation; either version 2, or (at your option)
   8 ;; any later version.
   9 ;;
  10 ;; This program is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;; GNU General Public License for more details.
  14 ;;
  15 ;; You should have received a copy of the GNU General Public License
  16 ;; along with this program; if not, write to the Free Software
  17 ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18
  19 ;;; Commentary:
  20
  21 ;;; Code:
  22
  23 (require 'color)
  24
  25 ;;;;##########################################################################
  26 ;;;;  User Options, Variables
  27 ;;;;##########################################################################
  28
  29 (defcustom jabber-muc-participant-colors nil
  30   "Alist of used colors.
  31 Format is (nick . color).  Color may be
  32 in #RGB or textual (like red or blue) notation.  Colors will be
  33 added in #RGB notation for unknown nicks."
  34   :type '(alist :key-type string :value-type color)
  35   :group 'jabber-chat)
  36
  37 (defcustom jabber-muc-colorize-local nil
  38   "Colorize MUC messages from you."
  39   :type 'boolean
  40   :group 'jabber-chat)
  41
  42 (defcustom jabber-muc-colorize-foreign nil
  43   "Colorize MUC messages not from you."
  44   :type 'boolean
  45   :group 'jabber-chat)
  46
  47 (defcustom jabber-muc-nick-saturation 1.0
  48   "Default saturation for nick coloring."
  49   :type 'float
  50   :group 'jabber-chat)
  51
  52 (defcustom jabber-muc-nick-value 1.0
  53   "Default value for nick coloring."
  54   :type 'float
  55   :group 'jabber-chat)
  56
  57 (defun jabber-muc-nick-hsv-to-hsl (h s v)
  58   "Convert color consisting of H, S and V to list of HSL values."
  59   ;; https://en.wikipedia.org/wiki/HSL_and_HSV#HSV_to_HSL
  60   (let* ((hue h)
  61          (luminance (* v (- 1 (/ s 2.0))))
  62          (saturation (if (or (= luminance 0) (= luminance 1))
  63                          0
  64                        (/ (- v luminance) (min luminance (- 1 luminance))))))
  65     (list hue saturation luminance)))
  66
  67 (defun jabber-muc-nick-gen-color (nick)
  68   "Return a good enough color from the available pool."
  69   (let* ((pool-index (mod (string-to-number (substring (md5 nick) 0 6) 16) 360))
  70          (hue (/ pool-index 360.0))
  71          (saturation jabber-muc-nick-saturation)
  72          (value jabber-muc-nick-value)
  73          (hsl (jabber-muc-nick-hsv-to-hsl hue saturation value)))
  74     (apply #'color-rgb-to-hex (apply #'color-hsl-to-rgb hsl))))
  75
  76 (defun jabber-muc-nick-get-color (nick)
  77   "Get NICKs color."
  78   (let ((color (cdr (assoc nick jabber-muc-participant-colors))))
  79     (if color
  80         color
  81       (progn
  82         (unless jabber-muc-participant-colors)
  83         (push (cons nick (jabber-muc-nick-gen-color nick)) jabber-muc-participant-colors)
  84         (cdr (assoc nick jabber-muc-participant-colors))))))
  85
  86 (provide 'jabber-muc-nick-coloring)
  87
  88 ;;; jabber-muc-nick-coloring.el ends here