-;;; xterm.el --- define function key sequences for xterm
+;;; xterm.el --- define function key sequences and standard colors for xterm
-;; Copyright (C) 1995 Free Software Foundation, Inc.
+;; Copyright (C) 1995, 2002, 2004 Free Software Foundation, Inc.
;; Author: FSF
;; Keywords: terminals
;;; Code:
-(define-key function-key-map "\e[A" [up])
-(define-key function-key-map "\e[B" [down])
-(define-key function-key-map "\e[C" [right])
-(define-key function-key-map "\e[D" [left])
-(define-key function-key-map "\e[2~" [insert])
-(define-key function-key-map "\e[4~" [select])
-(define-key function-key-map "\e[5~" [prior])
-(define-key function-key-map "\e[6~" [next])
-(define-key function-key-map "\e[11~" [f1])
-(define-key function-key-map "\e[12~" [f2])
-(define-key function-key-map "\e[13~" [f3])
-(define-key function-key-map "\e[14~" [f4])
-(define-key function-key-map "\e[15~" [f5])
-(define-key function-key-map "\e[17~" [f6])
-(define-key function-key-map "\e[18~" [f7])
-(define-key function-key-map "\e[19~" [f8])
-(define-key function-key-map "\e[20~" [f9])
-(define-key function-key-map "\e[21~" [f10])
-(define-key function-key-map "\e[23~" [f11])
-(define-key function-key-map "\e[24~" [f12])
-(define-key function-key-map "\e[29~" [print])
+(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[1;2A" [S-up])
+ (define-key map "\e[1;2B" [S-down])
+ (define-key map "\e[1;2C" [S-right])
+ (define-key map "\e[1;2D" [S-left])
+
+ (define-key map "\e[1;5A" [C-up])
+ (define-key map "\e[1;5B" [C-down])
+ (define-key map "\e[1;5C" [C-right])
+ (define-key map "\e[1;5D" [C-left])
+
+ (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