lisp/term/rxvt.el

   1 ;;; rxvt.el --- define function key sequences and standard colors for rxvt
   2
   3 ;; Copyright (C) 2002 Free Software Foundation, Inc.
   4
   5 ;; Author: Eli Zaretskii
   6 ;; Keywords: terminals
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation; either version 2, or (at your option)
  13 ;; any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  23 ;; Boston, MA 02111-1307, USA.
  24
  25 ;;; Commentary:
  26
  27 ;;; Code:
  28
  29 ;; Set up function-key-map entries that termcap and terminfo don't know.
  30 (let ((map (make-sparse-keymap)))
  31   (define-key map "\e[A" [up])
  32   (define-key map "\e[B" [down])
  33   (define-key map "\e[C" [right])
  34   (define-key map "\e[D" [left])
  35   (define-key map "\e[7~" [home])
  36   (define-key map "\e[2~" [insert])
  37   (define-key map "\e[3~" [delete])
  38   (define-key map "\e[4~" [select])
  39   (define-key map "\e[5~" [prior])
  40   (define-key map "\e[6~" [next])
  41   (define-key map "\e[11~" [f1])
  42   (define-key map "\e[12~" [f2])
  43   (define-key map "\e[13~" [f3])
  44   (define-key map "\e[14~" [f4])
  45   (define-key map "\e[15~" [f5])
  46   (define-key map "\e[17~" [f6])
  47   (define-key map "\e[18~" [f7])
  48   (define-key map "\e[19~" [f8])
  49   (define-key map "\e[20~" [f9])
  50   (define-key map "\e[21~" [f10])
  51   (define-key map "\e[23~" [f11])
  52   (define-key map "\e[24~" [f12])
  53   (define-key map "\e[29~" [print])
  54
  55   (define-key map "\e[11^" [C-f1])
  56   (define-key map "\e[12^" [C-f2])
  57   (define-key map "\e[13^" [C-f3])
  58   (define-key map "\e[14^" [C-f4])
  59   (define-key map "\e[15^" [C-f5])
  60   (define-key map "\e[17^" [C-f6])
  61   (define-key map "\e[18^" [C-f7])
  62   (define-key map "\e[19^" [C-f8])
  63   (define-key map "\e[20^" [C-f9])
  64   (define-key map "\e[21^" [C-f10])
  65   (define-key map "\e[23^" [C-f11])
  66   (define-key map "\e[24^" [C-f12])
  67
  68   (define-key map "\e[29~" [print])
  69
  70   (define-key map "\e[2;2~" [S-insert])
  71   (define-key map "\e[3$" [S-delete])
  72
  73   (define-key map "\e[2^" [C-insert])
  74   (define-key map "\e[3^" [C-delete])
  75   (define-key map "\e[5^" [C-prior])
  76   (define-key map "\e[6^" [C-next])
  77   (define-key map "\eOd" [C-left])
  78   (define-key map "\eOc" [C-right])
  79   (define-key map "\eOa" [C-up])
  80   (define-key map "\eOb" [C-down])
  81
  82   (define-key map "\e[5$" [S-prior])
  83   (define-key map "\e[6$" [S-next])
  84   (define-key map "\e[8$" [S-end])
  85   (define-key map "\e[7$" [S-home])
  86   (define-key map "\e[d" [S-left])
  87   (define-key map "\e[c" [S-right])
  88   (define-key map "\e[a" [S-up])
  89   (define-key map "\e[b" [S-down])
  90
  91   ;; Use inheritance to let the main keymap override those defaults.
  92   ;; This way we don't override terminfo-derived settings or settings
  93   ;; made in the .emacs file.
  94   (set-keymap-parent map (keymap-parent function-key-map))
  95   (set-keymap-parent function-key-map map))
  96
  97 ;; Set up colors, for those versions of rxvt that support it.
  98 (defvar rxvt-standard-colors
  99   ;; The names of the colors in the comments taken from the rxvt.1 man
 100   ;; page; the corresponding RGB values--from rgb.txt.
 101   '(("black"          0 (  0   0   0))  ; black
 102     ("red"            1 (205   0   0))  ; red3
 103     ("green"          2 (  0 205   0))  ; green3
 104     ("yellow"         3 (205 205   0))  ; yellow3
 105     ("blue"           4 (  0   0 205))  ; blue3
 106     ("magenta"        5 (205   0 205))  ; magenta3
 107     ("cyan"           6 (  0 205 205))  ; cyan3
 108     ("white"          7 (250 235 215))  ; AntiqueWhite
 109     ("brightblack"    8 ( 64  64  64))  ; gray25
 110     ("brightred"      9 (255   0   0))  ; red
 111     ("brightgreen"   10 (  0 255   0))  ; green
 112     ("brightyellow"  11 (255 255   0))  ; yellow
 113     ("brightblue"    12 (  0   0 255))  ; blue
 114     ("brightmagenta" 13 (255   0 255))  ; magenta
 115     ("brightcyan"    14 (  0 255 255))  ; cyan
 116     ("brightwhite"   15 (255 255 255))) ; white
 117   "Names of 16 standard rxvt colors, their numbers, and RGB values.")
 118
 119 (defun rxvt-rgb-convert-to-16bit (prim)
 120   "Convert an 8-bit primary color value PRIM to a corresponding 16-bit value."
 121   (min 65535 (round (* (/ prim 255.0) 65535.0))))
 122
 123 (defun rxvt-register-default-colors ()
 124   "Register the default set of colors for rxvt or compatible emulator.
 125
 126 This function registers the number of colors returned by `display-color-cells'
 127 for the currently selected frame."
 128   (let* ((ncolors (display-color-cells))
 129          (colors rxvt-standard-colors)
 130          (color (car colors)))
 131     (if (> ncolors 0)
 132         ;; Clear the 8 default tty colors registered by startup.el
 133         (tty-color-clear))
 134     ;; Only register as many colors as are supported by the display.
 135     (while (and (> ncolors 0) colors)
 136       (tty-color-define (car color) (cadr color)
 137                         (mapcar 'rxvt-rgb-convert-to-16bit
 138                                 (car (cddr color))))
 139       (setq colors (cdr colors)
 140             color (car colors)
 141             ncolors (1- ncolors)))
 142     ;; Modifying color mappings means realized faces don't use the
 143     ;; right colors, so clear them.
 144     (clear-face-cache)))
 145
 146 ;; rxvt puts the default colors into an environment variable
 147 ;; COLORFGBG.  We use this to set the background mode in a more
 148 ;; intelligent way than the default guesswork in startup.el.
 149 (defun rxvt-set-background-mode ()
 150   "Set background mode as appropriate for the default rxvt colors."
 151   (let ((fgbg (getenv "COLORFGBG"))
 152         bg rgb)
 153     (setq frame-background-mode 'light) ; default
 154     (when (and fgbg
 155                (string-match ".*;\\([0-9][0-9]?\\)\\'" fgbg))
 156       (setq bg (string-to-number (substring fgbg (match-beginning 1))))
 157       ;; The next line assumes that rxvt-standard-colors are ordered
 158       ;; by the color index in the ascending order!
 159       (setq rgb (car (cddr (nth bg rxvt-standard-colors))))
 160       ;; See the commentary in frame-set-background-mode about the
 161       ;; computation below.
 162       (if (< (apply '+ rgb)
 163              ;; The following line assumes that white is the 15th
 164              ;; color in rxvt-standard-colors.
 165              (* (apply '+ (car (cddr (nth 15 rxvt-standard-colors)))) 0.6))
 166           (setq frame-background-mode 'dark)))
 167     (frame-set-background-mode (selected-frame))))
 168
 169 ;; Do it!
 170 (rxvt-register-default-colors)
 171 (rxvt-set-background-mode)
 172 ;; This recomputes all the default faces given the colors we've just set up.
 173 (tty-set-up-initial-frame-faces)
 174
 175 ;;; rxvt.el ends here