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;;; xterm.el --- define function key sequences and standard colors for xterm
;; Copyright (C) 1995, 2002 Free Software Foundation, Inc.
;; Author: FSF
;; 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 2, 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
(let ((map (make-sparse-keymap)))
(define-key map "\e[A" [up])
(define-key map "\e[B" [down])
(define-key map "\e[C" [right])
(define-key map "\e[D" [left])
(define-key map "\e[1~" [home])
(define-key map "\e[2~" [insert])
(define-key map "\e[3~" [delete])
(define-key map "\e[4~" [select])
(define-key map "\e[5~" [prior])
(define-key map "\e[6~" [next])
(define-key map "\e[11~" [f1])
(define-key map "\e[12~" [f2])
(define-key map "\e[13~" [f3])
(define-key map "\e[14~" [f4])
(define-key map "\e[15~" [f5])
(define-key map "\e[17~" [f6])
(define-key map "\e[18~" [f7])
(define-key map "\e[19~" [f8])
(define-key map "\e[20~" [f9])
(define-key map "\e[21~" [f10])
(define-key map "\e[23~" [f11])
(define-key map "\e[24~" [f12])
(define-key map "\e[29~" [print])
(define-key map "\e[2;2~" [S-insert])
(define-key map "\e[3;2~" [S-delete])
(define-key map "\e[5;2~" [S-prior])
(define-key map "\e[6;2~" [S-next])
(define-key map "\e[2;5~" [C-insert])
(define-key map "\e[3;5~" [C-delete])
(define-key map "\e[5;5~" [C-prior])
(define-key map "\e[6;5~" [C-next])
(define-key map "\eOA" [up])
(define-key map "\eOB" [down])
(define-key map "\eOC" [right])
(define-key map "\eOD" [left])
(define-key map "\eOF" [end])
(define-key map "\eOH" [home])
(define-key map "\eO2A" [S-up])
(define-key map "\eO2B" [S-down])
(define-key map "\eO2C" [S-right])
(define-key map "\eO2D" [S-left])
(define-key map "\eO2F" [S-end])
(define-key map "\eO2H" [S-home])
(define-key map "\eO5A" [C-up])
(define-key map "\eO5B" [C-down])
(define-key map "\eO5C" [C-right])
(define-key map "\eO5D" [C-left])
(define-key map "\eO5F" [C-end])
(define-key map "\eO5H" [C-home])
;; Use inheritance to let the main keymap override those defaults.
;; This way we don't override terminfo-derived settings or settings
;; made in the .emacs file.
(set-keymap-parent map (keymap-parent function-key-map))
(set-keymap-parent function-key-map map))
;; Set up colors, for those versions of xterm that support it.
(defvar xterm-standard-colors
;; The names in the comments taken from XTerm-col.ad in the xterm
;; distribution, see ftp://dickey.his.com/xterm/. RGB values are
;; 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 xterm/aixterm colors, their numbers, and RGB values.")
(defun xterm-rgb-convert-to-16bit (prim)
"Convert an 8-bit primary color value PRIM to a corresponding 16-bit value."
(min 65535 (round (* (/ prim 255.0) 65535.0))))
(defun xterm-register-default-colors ()
"Register the default set of colors for xterm or compatible emulator.
This function registers the number of colors returned by `display-color-cells'
for the currently selected frame. The first 16 colors are taken from
`xterm-standard-colors', which see, while the rest are computed assuming
either the 88- or 256-color standard color scheme supported by latest
versions of xterm."
(let* ((ncolors (display-color-cells))
(colors xterm-standard-colors)
(color (car colors)))
(if (> ncolors 0)
;; Clear the 8 default tty colors registered by startup.el
(tty-color-clear))
;; Only register as many colors as are supported by the display.
(while (and (> ncolors 0) colors)
(tty-color-define (car color) (cadr color)
(mapcar 'xterm-rgb-convert-to-16bit
(car (cddr color))))
(setq colors (cdr colors)
color (car colors)
ncolors (1- ncolors)))
;; We've exhausted the colors from `xterm-standard-colors'. If there
;; are more colors to support, compute them now.
(when (> ncolors 0)
(cond
((= ncolors 240) ; 256-color xterm
;; 216 non-gray colors first
(let ((r 0) (g 0) (b 0))
(while (> ncolors 24)
;; This and other formulae taken from 256colres.pl and
;; 88colres.pl in the xterm distribution.
(tty-color-define (format "color-%d" (- 256 ncolors))
(- 256 ncolors)
(mapcar 'xterm-rgb-convert-to-16bit
(list (round (* r 42.5))
(round (* g 42.5))
(round (* b 42.5)))))
(setq b (1+ b))
(if (> b 5)
(setq g (1+ g)
b 0))
(if (> g 5)
(setq r (1+ r)
g 0))
(setq ncolors (1- ncolors))))
;; Now the 24 gray colors
(while (> ncolors 0)
(setq color (xterm-rgb-convert-to-16bit (+ 8 (* (- 24 ncolors) 10))))
(tty-color-define (format "color-%d" (- 256 ncolors))
(- 256 ncolors)
(list color color color))
(setq ncolors (1- ncolors))))
((= ncolors 72) ; 88-color xterm
;; 64 non-gray colors
(let ((levels '(0 139 205 255))
(r 0) (g 0) (b 0))
(while (> ncolors 8)
(tty-color-define (format "color-%d" (- 88 ncolors))
(- 88 ncolors)
(mapcar 'xterm-rgb-convert-to-16bit
(list (nth r levels)
(nth g levels)
(nth b levels))))
(setq b (1+ b))
(if (> b 3)
(setq g (1+ g)
b 0))
(if (> g 3)
(setq r (1+ r)
g 0))
(setq ncolors (1- ncolors))))
;; Now the 8 gray colors
(while (> ncolors 0)
(setq color (xterm-rgb-convert-to-16bit
(round
(if (= ncolors 8)
46.36363636
(+ (* (- 8 ncolors) 23.18181818) 69.54545454)))))
(tty-color-define (format "color-%d" (- 88 ncolors))
(- 88 ncolors)
(list color color color))
(setq ncolors (1- ncolors))))
(t (error "Unsupported number of xterm colors (%d)" (+ 16 ncolors)))))
;; Modifying color mappings means realized faces don't use the
;; right colors, so clear them.
(clear-face-cache)))
;; 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 xterm-rxvt-set-background-mode ()
"Set background mode as appropriate for the default rxvt colors."
(let ((fgbg (getenv "COLORFGBG"))
bg rgb)
(setq frame-background-mode 'light) ; default
(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 xterm-standard-colors are ordered
;; by the color index in the ascending order!
(setq rgb (car (cddr (nth bg xterm-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 xterm-standard-colors.
(* (apply '+ (car (cddr (nth 15 xterm-standard-colors)))) 0.6))
(setq frame-background-mode 'dark)))
(frame-set-background-mode (selected-frame))))
;; Do it!
(xterm-register-default-colors)
;; If this xterm is actually a disguised rxvt, be more intelligent about
;; determining the background mode.
(and (getenv "COLORTERM")
(string-match "\\`rxvt" (getenv "COLORTERM"))
(xterm-rxvt-set-background-mode))
;; This recomputes all the default faces given the colors we've just set up.
(tty-set-up-initial-frame-faces)
;;; arch-tag: 12e7ebdd-1e6c-4b25-b0f9-35ace25e855a
;;; xterm.el ends here
|
