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lui-irc-colors.el
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lui-irc-colors.el
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;;; lui-irc-colors.el --- Add IRC color support to LUI
;; Copyright (C) 2005 Jorgen Schaefer
;; Author: Jorgen Schaefer <forcer@forcix.cx>
;; This file is part of Lui.
;; 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 3
;; of the License, 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., 51 Franklin St, Fifth Floor, Boston, MA
;; 02110-1301 USA
;;; Commentary:
;; This tells LUI how to display IRC colors:
;; ^B - Bold
;; ^_ - Underline
;; ^V - Inverse
;; ^] - Italic
;; ^^ - Strikethrough
;; ^Q - Monospace
;; ^O - Return to normal
;; ^C1,2 - Colors
;; The colors are documented at http://www.mirc.co.uk/help/color.txt
;; and https://modern.ircdocs.horse/formatting.html
;;; Code:
(require 'lui)
(defgroup lui-irc-colors nil
"LUI IRC colors faces."
:group 'circe)
(defface lui-irc-colors-monospace-face
'((t :inherit fixed-pitch))
"Face used for inverse video."
:group 'lui-irc-colors)
(defface lui-irc-colors-inverse-face
'((t :inverse-video t))
"Face used for inverse video."
:group 'lui-irc-colors)
(defface lui-irc-colors-strike-through-face
'((t :strike-through t))
"Face used for inverse video."
:group 'lui-irc-colors)
(defface lui-irc-colors-spoiler-hover-face
'((((type graphic) (class color) (background dark))
:foreground "black")
(((type graphic) (class color) (background light))
:foreground "white")
(t :inverse-video t))
"Face used when hovering over text marked as spoiler"
:group 'lui-irc-colors)
(defun lui-irc-defface (face property on-dark on-light fallback doc)
(custom-declare-face
face
`((((type graphic) (class color) (background dark))
,property ,on-dark)
(((type graphic) (class color) (background light))
,property ,on-light)
(t ,property ,fallback))
doc
:group 'lui-irc-colors))
(defun lui-irc-deffaces-for-color (number on-dark on-light fallback name)
(lui-irc-defface
(intern (format "lui-irc-colors-fg-%d-face" number))
:foreground
on-dark on-light fallback
(concat "Face used for foreground IRC color "
(number-to-string number) " (" name ")."))
(lui-irc-defface
(intern (format "lui-irc-colors-bg-%d-face" number))
:background
on-light on-dark fallback
(concat "Face used for background IRC color "
(number-to-string number) " (" name ")."))
(lui-irc-defface
(intern (format "lui-irc-colors-spoiler-bg-%s-face" number))
:background
on-dark on-light fallback
(concat "Face used for spoiler background IRC color "
(number-to-string number) " (" name ").")))
(defun lui-irc-defface-bulk (colors)
(dotimes (n (length colors))
(apply 'lui-irc-deffaces-for-color n (elt colors n))))
(lui-irc-defface-bulk
[("#ffffff" "#585858" "white" "white")
("#a5a5a5" "#000000" "black" "black")
("#9b9bff" "#0000ff" "blue4" "blue")
("#40eb51" "#006600" "green4" "green")
("#ff9696" "#b60000" "red" "red")
("#d19999" "#8f3d3d" "red4" "brown")
("#d68fff" "#9c009c" "magenta4" "purple")
("#ffb812" "#7a4f00" "yellow4" "orange")
("#ffff00" "#5c5c00" "yellow" "yellow")
("#80ff95" "#286338" "green" "light green")
("#00b8b8" "#006078" "cyan4" "teal")
("#00ffff" "#006363" "cyan" "light cyan")
("#a8aeff" "#3f568c" "blue" "light blue")
("#ff8bff" "#853885" "magenta" "pink")
("#cfcfcf" "#171717" "dimgray" "grey")
("#e6e6e6" "#303030" "gray" "light grey")])
(defvar lui-irc-colors-regex
"\\(\x02\\|\x03\\|\x16\\|\x0F\\|\x11\\|\x1D\\|\x1E\\|\x1F\\)"
"A regular expression matching IRC control codes.")
;;;###autoload
(defun enable-lui-irc-colors ()
"Enable IRC color interpretation for Lui."
(interactive)
(add-hook 'lui-pre-output-hook 'lui-irc-colors))
(defun disable-lui-irc-colors ()
"Disable IRC color interpretation for Lui."
(interactive)
(remove-hook 'lui-pre-output-hook 'lui-irc-colors))
(defun lui-irc-colors ()
"Add color faces for IRC colors.
This is an appropriate function for `lui-pre-output-hook'."
(goto-char (point-min))
(let ((start (point))
(boldp nil)
(monospacep nil)
(inversep nil)
(italicp nil)
(strikethroughp nil)
(underlinep nil)
(fg nil)
(bg nil))
(while (re-search-forward lui-irc-colors-regex nil t)
(lui-irc-propertize start (point)
boldp monospacep inversep italicp
strikethroughp underlinep
fg bg)
(let ((code (match-string 1)))
(replace-match "")
(setq start (point))
(cond
((string= code "\x02")
(setq boldp (not boldp)))
((string= code "\x11")
(setq monospacep (not monospacep)))
((string= code "\x16")
(setq inversep (not inversep)))
((string= code "\x1D")
(setq italicp (not italicp)))
((string= code "\x1E")
(setq strikethroughp (not strikethroughp)))
((string= code "\x1F")
(setq underlinep (not underlinep)))
((string= code "\x0F")
(setq boldp nil
inversep nil
italicp nil
underlinep nil
fg nil
bg nil))
((string= code "\x03")
(if (looking-at "\\([0-9][0-9]?\\)\\(,\\([0-9][0-9]?\\)\\)?")
(progn
(setq fg (string-to-number (match-string 1))
bg (if (match-string 2)
(string-to-number (match-string 3))
bg))
(setq fg (if (and fg (not (= fg 99))) (mod fg 16) nil)
bg (if (and bg (not (= bg 99))) (mod bg 16) nil))
(replace-match ""))
(setq fg nil
bg nil)))
(t
(error "lui-irc-colors: Can't happen!")))))
(lui-irc-propertize (point) (point-max)
boldp monospacep inversep italicp
strikethroughp underlinep fg bg)))
(defun lui-irc-propertize (start end boldp monospacep inversep italicp strikethroughp underlinep fg bg)
"Propertize the region between START and END."
(let ((faces nil)
(mouse-faces nil))
(when boldp
(push 'bold faces))
(when monospacep
(push 'lui-irc-colors-monospace-face faces))
(when inversep
(push 'lui-irc-colors-inverse-face faces))
(when italicp
(push 'italic faces))
(when underlinep
(push 'underline faces))
(when fg
(push (lui-irc-colors-face 'fg fg) faces))
(when bg
(if (= fg bg)
(progn
(push (lui-irc-colors-spoiler-face 'bg bg) faces)
(push (lui-irc-colors-spoiler-face 'bg bg) mouse-faces)
(push 'lui-irc-colors-spoiler-hover-face mouse-faces))
(push (lui-irc-colors-face 'bg bg) faces)))
(when faces
(add-face-text-property start end (nreverse faces)))
(when mouse-faces
(add-text-properties start end `(mouse-face ,(nreverse mouse-faces))))))
(defun lui-irc-colors-face (type n)
"Return a face appropriate for face number N.
TYPE is either \\='fg or \\='bg."
(if (and (<= 0 n)
(<= n 15))
(intern (format "lui-irc-colors-%s-%s-face" type n))
'default-face))
(defun lui-irc-colors-spoiler-face (type n)
"Return a spoiler face appropriate for face number N.
TYPE is either \\='fg or \\='bg."
(if (and (<= 0 n)
(<= n 15))
(intern (format "lui-irc-colors-spoiler-%s-%s-face" type n))
'default-face))
(provide 'lui-irc-colors)
;;; lui-irc-colors.el ends here