projects / config.git / blame
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| 53e6db90 DC |
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 |