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240 lines
8.6 KiB
EmacsLisp
240 lines
8.6 KiB
EmacsLisp
;;; xterm.el --- define function key sequences and standard colors for xterm
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;; Copyright (C) 1995, 2002 Free Software Foundation, Inc.
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;; Author: FSF
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;; Keywords: terminals
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(let ((map (make-sparse-keymap)))
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(define-key map "\e[A" [up])
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(define-key map "\e[B" [down])
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(define-key map "\e[C" [right])
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(define-key map "\e[D" [left])
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(define-key map "\e[1~" [home])
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(define-key map "\e[2~" [insert])
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(define-key map "\e[3~" [delete])
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(define-key map "\e[4~" [select])
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(define-key map "\e[5~" [prior])
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(define-key map "\e[6~" [next])
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(define-key map "\e[11~" [f1])
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(define-key map "\e[12~" [f2])
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(define-key map "\e[13~" [f3])
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(define-key map "\e[14~" [f4])
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(define-key map "\e[15~" [f5])
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(define-key map "\e[17~" [f6])
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(define-key map "\e[18~" [f7])
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(define-key map "\e[19~" [f8])
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(define-key map "\e[20~" [f9])
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(define-key map "\e[21~" [f10])
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(define-key map "\e[23~" [f11])
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(define-key map "\e[24~" [f12])
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(define-key map "\e[29~" [print])
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(define-key map "\e[2;2~" [S-insert])
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(define-key map "\e[3;2~" [S-delete])
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(define-key map "\e[5;2~" [S-prior])
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(define-key map "\e[6;2~" [S-next])
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(define-key map "\e[2;5~" [C-insert])
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(define-key map "\e[3;5~" [C-delete])
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(define-key map "\e[5;5~" [C-prior])
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(define-key map "\e[6;5~" [C-next])
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(define-key map "\eOA" [up])
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(define-key map "\eOB" [down])
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(define-key map "\eOC" [right])
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(define-key map "\eOD" [left])
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(define-key map "\eOF" [end])
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(define-key map "\eOH" [home])
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(define-key map "\eO2A" [S-up])
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(define-key map "\eO2B" [S-down])
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(define-key map "\eO2C" [S-right])
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(define-key map "\eO2D" [S-left])
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(define-key map "\eO2F" [S-end])
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(define-key map "\eO2H" [S-home])
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(define-key map "\eO5A" [C-up])
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(define-key map "\eO5B" [C-down])
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(define-key map "\eO5C" [C-right])
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(define-key map "\eO5D" [C-left])
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(define-key map "\eO5F" [C-end])
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(define-key map "\eO5H" [C-home])
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;; Use inheritance to let the main keymap override those defaults.
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;; This way we don't override terminfo-derived settings or settings
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;; made in the .emacs file.
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(set-keymap-parent map (keymap-parent function-key-map))
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(set-keymap-parent function-key-map map))
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;; Set up colors, for those versions of xterm that support it.
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(defvar xterm-standard-colors
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;; The names in the comments taken from XTerm-col.ad in the xterm
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;; distribution, see ftp://dickey.his.com/xterm/. RGB values are
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;; from rgb.txt.
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'(("black" 0 ( 0 0 0)) ; black
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("red" 1 (205 0 0)) ; red3
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("green" 2 ( 0 205 0)) ; green3
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("yellow" 3 (205 205 0)) ; yellow3
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("blue" 4 ( 0 0 205)) ; blue3
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("magenta" 5 (205 0 205)) ; magenta3
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("cyan" 6 ( 0 205 205)) ; cyan3
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("white" 7 (229 229 229)) ; gray90
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("brightblack" 8 ( 77 77 77)) ; gray30
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("brightred" 9 (255 0 0)) ; red
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("brightgreen" 10 ( 0 255 0)) ; green
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("brightyellow" 11 (255 255 0)) ; yellow
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("brightblue" 12 ( 0 0 255)) ; blue
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("brightmagenta" 13 (255 0 255)) ; magenta
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("brightcyan" 14 ( 0 255 255)) ; cyan
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("brightwhite" 15 (255 255 255))) ; white
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"Names of 16 standard xterm/aixterm colors, their numbers, and RGB values.")
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(defun xterm-rgb-convert-to-16bit (prim)
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"Convert an 8-bit primary color value PRIM to a corresponding 16-bit value."
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(min 65535 (round (* (/ prim 255.0) 65535.0))))
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(defun xterm-register-default-colors ()
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"Register the default set of colors for xterm or compatible emulator.
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This function registers the number of colors returned by `display-color-cells'
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for the currently selected frame. The first 16 colors are taken from
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`xterm-standard-colors', which see, while the rest are computed assuming
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either the 88- or 256-color standard color scheme supported by latest
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versions of xterm."
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(let* ((ncolors (display-color-cells))
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(colors xterm-standard-colors)
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(color (car colors)))
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(if (> ncolors 0)
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;; Clear the 8 default tty colors registered by startup.el
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(tty-color-clear))
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;; Only register as many colors as are supported by the display.
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(while (and (> ncolors 0) colors)
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(tty-color-define (car color) (cadr color)
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(mapcar 'xterm-rgb-convert-to-16bit
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(car (cddr color))))
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(setq colors (cdr colors)
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color (car colors)
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ncolors (1- ncolors)))
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;; We've exhausted the colors from `xterm-standard-colors'. If there
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;; are more colors to support, compute them now.
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(when (> ncolors 0)
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(cond
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((= ncolors 240) ; 256-color xterm
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;; 216 non-gray colors first
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(let ((r 0) (g 0) (b 0))
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(while (> ncolors 24)
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;; This and other formulae taken from 256colres.pl and
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;; 88colres.pl in the xterm distribution.
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(tty-color-define (format "color-%d" (- 256 ncolors))
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(- 256 ncolors)
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(mapcar 'xterm-rgb-convert-to-16bit
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(list (round (* r 42.5))
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(round (* g 42.5))
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(round (* b 42.5)))))
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(setq b (1+ b))
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(if (> b 5)
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(setq g (1+ g)
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b 0))
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(if (> g 5)
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(setq r (1+ r)
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g 0))
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(setq ncolors (1- ncolors))))
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;; Now the 24 gray colors
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(while (> ncolors 0)
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(setq color (xterm-rgb-convert-to-16bit (+ 8 (* (- 24 ncolors) 10))))
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(tty-color-define (format "color-%d" (- 256 ncolors))
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(- 256 ncolors)
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(list color color color))
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(setq ncolors (1- ncolors))))
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((= ncolors 72) ; 88-color xterm
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;; 64 non-gray colors
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(let ((levels '(0 139 205 255))
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(r 0) (g 0) (b 0))
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(while (> ncolors 8)
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(tty-color-define (format "color-%d" (- 88 ncolors))
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(- 88 ncolors)
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(mapcar 'xterm-rgb-convert-to-16bit
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(list (nth r levels)
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(nth g levels)
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(nth b levels))))
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(setq b (1+ b))
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(if (> b 3)
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(setq g (1+ g)
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b 0))
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(if (> g 3)
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(setq r (1+ r)
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g 0))
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(setq ncolors (1- ncolors))))
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;; Now the 8 gray colors
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(while (> ncolors 0)
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(setq color (xterm-rgb-convert-to-16bit
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(round
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(if (= ncolors 8)
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46.36363636
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(+ (* (- 8 ncolors) 23.18181818) 69.54545454)))))
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(tty-color-define (format "color-%d" (- 88 ncolors))
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(- 88 ncolors)
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(list color color color))
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(setq ncolors (1- ncolors))))
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(t (error "Unsupported number of xterm colors (%d)" (+ 16 ncolors)))))
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;; Modifying color mappings means realized faces don't use the
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;; right colors, so clear them.
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(clear-face-cache)))
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;; rxvt puts the default colors into an environment variable
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;; COLORFGBG. We use this to set the background mode in a more
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;; intelligent way than the default guesswork in startup.el.
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(defun xterm-rxvt-set-background-mode ()
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"Set background mode as appropriate for the default rxvt colors."
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(let ((fgbg (getenv "COLORFGBG"))
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bg rgb)
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(setq frame-background-mode 'light) ; default
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(when (and fgbg
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(string-match ".*;\\([0-9][0-9]?\\)\\'" fgbg))
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(setq bg (string-to-number (substring fgbg (match-beginning 1))))
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;; The next line assumes that xterm-standard-colors are ordered
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;; by the color index in the ascending order!
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(setq rgb (car (cddr (nth bg xterm-standard-colors))))
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;; See the commentary in frame-set-background-mode about the
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;; computation below.
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(if (< (apply '+ rgb)
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;; The following line assumes that white is the 15th
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;; color in xterm-standard-colors.
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(* (apply '+ (car (cddr (nth 15 xterm-standard-colors)))) 0.6))
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(setq frame-background-mode 'dark)))
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(frame-set-background-mode (selected-frame))))
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;; Do it!
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(xterm-register-default-colors)
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;; If this xterm is actually a disguised rxvt, be more intelligent about
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;; determining the background mode.
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(and (getenv "COLORTERM")
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(string-match "\\`rxvt" (getenv "COLORTERM"))
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(xterm-rxvt-set-background-mode))
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;; This recomputes all the default faces given the colors we've just set up.
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(tty-set-up-initial-frame-faces)
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;;; xterm.el ends here
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