;;; rxvt.el --- define function key sequences and standard colors for rxvt -*- lexical-binding: t -*-
;; Copyright (C) 2002-2022 Free Software Foundation, Inc.
;; Author: Eli Zaretskii
;; Keywords: terminals
;; This file is part of GNU Emacs.
;; GNU Emacs 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.
;; GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(require 'term/xterm)
(defgroup rxvt nil
"(U)RXVT support."
:version "28.1"
:group 'terminals)
(defcustom rxvt-set-window-title nil
"Whether Emacs should set window titles to an Emacs frame in RXVT."
:version "28.1"
:type 'boolean)
(defvar rxvt-function-map
(let ((map (make-sparse-keymap)))
(set-keymap-parent map xterm-rxvt-function-map)
;; Set up input-decode-map entries that termcap and terminfo don't know.
(define-key map "\e[7~" [home])
(define-key map "\e[8~" [end])
;; The strings emitted by f11 and f12 are the same as the strings
;; emitted by S-f1 and S-f2, so don't define f11 and f12.
;; (define-key rxvt-function-map "\e[23~" [f11])
;; (define-key rxvt-function-map "\e[24~" [f12])
(define-key map "\e[23~" [S-f1])
(define-key map "\e[24~" [S-f2])
(define-key map "\e[11^" [C-f1])
(define-key map "\e[12^" [C-f2])
(define-key map "\e[13^" [C-f3])
(define-key map "\e[14^" [C-f4])
(define-key map "\e[15^" [C-f5])
(define-key map "\e[17^" [C-f6])
(define-key map "\e[18^" [C-f7])
(define-key map "\e[19^" [C-f8])
(define-key map "\e[20^" [C-f9])
(define-key map "\e[21^" [C-f10])
(define-key map "\e[25~" [S-f3])
(define-key map "\e[26~" [S-f4])
(define-key map "\e[28~" [S-f5])
(define-key map "\e[29~" [S-f6])
(define-key map "\e[31~" [S-f7])
(define-key map "\e[32~" [S-f8])
(define-key map "\e[33~" [S-f9])
(define-key map "\e[34~" [S-f10])
(define-key map "\e[23^" [C-S-f1])
(define-key map "\e[24^" [C-S-f2])
(define-key map "\e[25^" [C-S-f3])
(define-key map "\e[26^" [C-S-f4])
(define-key map "\e[28^" [C-S-f5])
(define-key map "\e[29^" [C-S-f6])
(define-key map "\e[31^" [C-S-f7])
(define-key map "\e[32^" [C-S-f8])
(define-key map "\e[33^" [C-S-f9])
(define-key map "\e[34^" [C-S-f10])
(define-key map "\e[2^" [C-insert])
(define-key map "\e[3^" [C-delete])
(define-key map "\e[5^" [C-prior])
(define-key map "\e[6^" [C-next])
(define-key map "\e[7^" [C-home])
(define-key map "\e[8^" [C-end])
(define-key map "\eOd" [C-left])
(define-key map "\eOc" [C-right])
(define-key map "\eOa" [C-up])
(define-key map "\eOb" [C-down])
(define-key map "\e[3$" [S-delete])
(define-key map "\e[5$" [S-prior])
(define-key map "\e[6$" [S-next])
(define-key map "\e[7$" [S-home])
(define-key map "\e[8$" [S-end])
(define-key map "\e[d" [S-left])
(define-key map "\e[c" [S-right])
(define-key map "\e[a" [S-up])
(define-key map "\e[b" [S-down])
map)
"Function key overrides for rxvt.")
(defvar rxvt-alternatives-map
(let ((map (make-sparse-keymap)))
;; The terminal initialization C code file might have initialized
;; function keys F11->F42 from the termcap/terminfo information. On
;; a PC-style keyboard these keys correspond to
;; MODIFIER-FUNCTION_KEY, where modifier is S-, C-, C-S-. The
;; code here substitutes the corresponding definitions in
;; function-key-map. This substitution is needed because if a key
;; definition if found in function-key-map, there are no further
;; lookups in other keymaps.
(define-key map [f11] [S-f1])
(define-key map [f12] [S-f2])
(define-key map [f13] [S-f3])
(define-key map [f14] [S-f4])
(define-key map [f15] [S-f5])
(define-key map [f16] [S-f6])
(define-key map [f17] [S-f7])
(define-key map [f18] [S-f8])
(define-key map [f19] [S-f9])
(define-key map [f20] [S-f10])
(define-key map [f23] [C-f1])
(define-key map [f24] [C-f2])
(define-key map [f25] [C-f3])
(define-key map [f26] [C-f4])
(define-key map [f27] [C-f5])
(define-key map [f28] [C-f6])
(define-key map [f29] [C-f7])
(define-key map [f30] [C-f8])
(define-key map [f31] [C-f9])
(define-key map [f32] [C-f10])
(define-key map [f33] [C-S-f1])
(define-key map [f34] [C-S-f2])
(define-key map [f35] [C-S-f3])
(define-key map [f36] [C-S-f4])
(define-key map [f37] [C-S-f5])
(define-key map [f38] [C-S-f6])
(define-key map [f39] [C-S-f7])
(define-key map [f40] [C-S-f8])
(define-key map [f41] [C-S-f9])
(define-key map [f42] [C-S-f10])
map)
"Keymap of possible alternative meanings for some keys.")
;; Set up colors, for those versions of rxvt that support it.
(defvar rxvt-standard-colors
;; The names of the colors in the comments taken from the rxvt.1 man
;; page; the corresponding RGB values--from rgb.txt.
'(("black" 0 ( 0 0 0)) ; black
("red" 1 (205 0 0)) ; red3
("green" 2 ( 0 205 0)) ; green3
("yellow" 3 (205 205 0)) ; yellow3
("blue" 4 ( 0 0 205)) ; blue3
("magenta" 5 (205 0 205)) ; magenta3
("cyan" 6 ( 0 205 205)) ; cyan3
("white" 7 (229 229 229)) ; gray90
("brightblack" 8 ( 77 77 77)) ; gray30
("brightred" 9 (255 0 0)) ; red
("brightgreen" 10 ( 0 255 0)) ; green
("brightyellow" 11 (255 255 0)) ; yellow
("brightblue" 12 ( 0 0 255)) ; blue
("brightmagenta" 13 (255 0 255)) ; magenta
("brightcyan" 14 ( 0 255 255)) ; cyan
("brightwhite" 15 (255 255 255))) ; white
"Names of 16 standard rxvt colors, their numbers, and RGB values.")
(defun terminal-init-rxvt ()
"Terminal initialization function for rxvt."
(xterm--push-map rxvt-alternatives-map local-function-key-map)
(xterm--push-map rxvt-function-map input-decode-map)
;; Initialize colors and background mode.
(xterm-register-default-colors rxvt-standard-colors)
(rxvt-set-background-mode)
;; This recomputes all the default faces given the colors we've just set up.
(tty-set-up-initial-frame-faces)
;; Unconditionally enable bracketed paste mode: terminals that don't
;; support it just ignore the sequence.
(xterm--init-bracketed-paste-mode)
(when rxvt-set-window-title
(xterm--init-frame-title))
(run-hooks 'terminal-init-rxvt-hook))
;; rxvt puts the default colors into an environment variable
;; COLORFGBG. We use this to set the background mode in a more
;; intelligent way than the default guesswork in startup.el.
(defun rxvt-set-background-mode ()
"Set background mode as appropriate for the default rxvt colors."
(let ((fgbg (getenv "COLORFGBG"))
bg rgb)
(set-terminal-parameter nil 'background-mode 'light)
(when (and fgbg
(string-match ".*;\\([0-9][0-9]?\\)\\'" fgbg))
(setq bg (string-to-number (substring fgbg (match-beginning 1))))
;; The next line assumes that rxvt-standard-colors are ordered
;; by the color index in the ascending order!
(setq rgb (car (cddr (nth bg rxvt-standard-colors))))
;; See the commentary in frame-set-background-mode about the
;; computation below.
(if (< (apply '+ rgb)
;; The following line assumes that white is the 15th
;; color in rxvt-standard-colors.
(* (apply '+ (car (cddr (nth 15 rxvt-standard-colors)))) 0.6))
(set-terminal-parameter nil 'background-mode 'dark)))))
(provide 'term/rxvt)
;;; rxvt.el ends here