lisp/term/rxvt.el

   1 ;;; rxvt.el --- define function key sequences and standard colors for rxvt
   2
   3 ;; Copyright (C) 2002-2013 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 3 of the License, or
  13 ;; (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (defvar rxvt-function-map
  28   (let ((map (make-sparse-keymap)))
  29
  30     ;; Set up input-decode-map entries that termcap and terminfo don't know.
  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[2~" [insert])
  36     (define-key map "\e[3~" [delete])
  37     (define-key map "\e[4~" [select])
  38     (define-key map "\e[5~" [prior])
  39     (define-key map "\e[6~" [next])
  40     (define-key map "\e[7~" [home])
  41     (define-key map "\e[8~" [end])
  42     (define-key map "\e[11~" [f1])
  43     (define-key map "\e[12~" [f2])
  44     (define-key map "\e[13~" [f3])
  45     (define-key map "\e[14~" [f4])
  46     (define-key map "\e[15~" [f5])
  47     (define-key map "\e[17~" [f6])
  48     (define-key map "\e[18~" [f7])
  49     (define-key map "\e[19~" [f8])
  50     (define-key map "\e[20~" [f9])
  51     (define-key map "\e[21~" [f10])
  52     ;; The strings emitted by f11 and f12 are the same as the strings
  53     ;; emitted by S-f1 and S-f2, so don't define f11 and f12.
  54     ;; (define-key rxvt-function-map "\e[23~" [f11])
  55     ;; (define-key rxvt-function-map "\e[24~" [f12])
  56     (define-key map "\e[29~" [print])
  57
  58     (define-key map "\e[11^" [C-f1])
  59     (define-key map "\e[12^" [C-f2])
  60     (define-key map "\e[13^" [C-f3])
  61     (define-key map "\e[14^" [C-f4])
  62     (define-key map "\e[15^" [C-f5])
  63     (define-key map "\e[17^" [C-f6])
  64     (define-key map "\e[18^" [C-f7])
  65     (define-key map "\e[19^" [C-f8])
  66     (define-key map "\e[20^" [C-f9])
  67     (define-key map "\e[21^" [C-f10])
  68
  69     (define-key map "\e[23~" [S-f1])
  70     (define-key map "\e[24~" [S-f2])
  71     (define-key map "\e[25~" [S-f3])
  72     (define-key map "\e[26~" [S-f4])
  73     (define-key map "\e[28~" [S-f5])
  74     (define-key map "\e[29~" [S-f6])
  75     (define-key map "\e[31~" [S-f7])
  76     (define-key map "\e[32~" [S-f8])
  77     (define-key map "\e[33~" [S-f9])
  78     (define-key map "\e[34~" [S-f10])
  79
  80     (define-key map "\e[23^" [C-S-f1])
  81     (define-key map "\e[24^" [C-S-f2])
  82     (define-key map "\e[25^" [C-S-f3])
  83     (define-key map "\e[26^" [C-S-f4])
  84     (define-key map "\e[28^" [C-S-f5])
  85     (define-key map "\e[29^" [C-S-f6])
  86     (define-key map "\e[31^" [C-S-f7])
  87     (define-key map "\e[32^" [C-S-f8])
  88     (define-key map "\e[33^" [C-S-f9])
  89     (define-key map "\e[34^" [C-S-f10])
  90
  91     (define-key map "\e[2^" [C-insert])
  92     (define-key map "\e[3^" [C-delete])
  93     (define-key map "\e[5^" [C-prior])
  94     (define-key map "\e[6^" [C-next])
  95     (define-key map "\e[7^" [C-home])
  96     (define-key map "\e[8^" [C-end])
  97     (define-key map "\eOd" [C-left])
  98     (define-key map "\eOc" [C-right])
  99     (define-key map "\eOa" [C-up])
 100     (define-key map "\eOb" [C-down])
 101
 102     (define-key map "\e[2;2~" [S-insert])
 103     (define-key map "\e[3$" [S-delete])
 104     (define-key map "\e[5$" [S-prior])
 105     (define-key map "\e[6$" [S-next])
 106     (define-key map "\e[7$" [S-home])
 107     (define-key map "\e[8$" [S-end])
 108     (define-key map "\e[d" [S-left])
 109     (define-key map "\e[c" [S-right])
 110     (define-key map "\e[a" [S-up])
 111     (define-key map "\e[b" [S-down])
 112     map)
 113   "Function key overrides for rxvt.")
 114
 115 (defvar rxvt-alternatives-map
 116   (let ((map (make-sparse-keymap)))
 117     ;; The terminal initialization C code file might have initialized
 118     ;; function keys F11->F42 from the termcap/terminfo information.  On
 119     ;; a PC-style keyboard these keys correspond to
 120     ;; MODIFIER-FUNCTION_KEY, where modifier is S-, C-, C-S-.  The
 121     ;; code here substitutes the corresponding definitions in
 122     ;; function-key-map.  This substitution is needed because if a key
 123     ;; definition if found in function-key-map, there are no further
 124     ;; lookups in other keymaps.
 125     (define-key map [f11] [S-f1])
 126     (define-key map [f12] [S-f2])
 127     (define-key map [f13] [S-f3])
 128     (define-key map [f14] [S-f4])
 129     (define-key map [f15] [S-f5])
 130     (define-key map [f16] [S-f6])
 131     (define-key map [f17] [S-f7])
 132     (define-key map [f18] [S-f8])
 133     (define-key map [f19] [S-f9])
 134     (define-key map [f20] [S-f10])
 135
 136     (define-key map [f23] [C-f1])
 137     (define-key map [f24] [C-f2])
 138     (define-key map [f25] [C-f3])
 139     (define-key map [f26] [C-f4])
 140     (define-key map [f27] [C-f5])
 141     (define-key map [f28] [C-f6])
 142     (define-key map [f29] [C-f7])
 143     (define-key map [f30] [C-f8])
 144     (define-key map [f31] [C-f9])
 145     (define-key map [f32] [C-f10])
 146
 147     (define-key map [f33] [C-S-f1])
 148     (define-key map [f34] [C-S-f2])
 149     (define-key map [f35] [C-S-f3])
 150     (define-key map [f36] [C-S-f4])
 151     (define-key map [f37] [C-S-f5])
 152     (define-key map [f38] [C-S-f6])
 153     (define-key map [f39] [C-S-f7])
 154     (define-key map [f40] [C-S-f8])
 155     (define-key map [f41] [C-S-f9])
 156     (define-key map [f42] [C-S-f10])
 157     map)
 158   "Keymap of possible alternative meanings for some keys.")
 159
 160 (defun terminal-init-rxvt ()
 161   "Terminal initialization function for rxvt."
 162
 163   (let ((map (copy-keymap rxvt-alternatives-map)))
 164     (set-keymap-parent map (keymap-parent local-function-key-map))
 165     (set-keymap-parent local-function-key-map map))
 166
 167   ;; Use inheritance to let the main keymap override those defaults.
 168   ;; This way we don't override terminfo-derived settings or settings
 169   ;; made in the init file.
 170   (let ((m (copy-keymap rxvt-function-map)))
 171     (set-keymap-parent m (keymap-parent input-decode-map))
 172     (set-keymap-parent input-decode-map m))
 173
 174   ;; Initialize colors and background mode.
 175   (rxvt-register-default-colors)
 176   (rxvt-set-background-mode)
 177   ;; This recomputes all the default faces given the colors we've just set up.
 178   (tty-set-up-initial-frame-faces))
 179
 180 ;; Set up colors, for those versions of rxvt that support it.
 181 (defvar rxvt-standard-colors
 182   ;; The names of the colors in the comments taken from the rxvt.1 man
 183   ;; page; the corresponding RGB values--from rgb.txt.
 184   '(("black"          0 (  0   0   0))  ; black
 185     ("red"            1 (205   0   0))  ; red3
 186     ("green"          2 (  0 205   0))  ; green3
 187     ("yellow"         3 (205 205   0))  ; yellow3
 188     ("blue"           4 (  0   0 205))  ; blue3
 189     ("magenta"        5 (205   0 205))  ; magenta3
 190     ("cyan"           6 (  0 205 205))  ; cyan3
 191     ("white"          7 (229 229 229))  ; gray90
 192     ("brightblack"    8 ( 77  77  77))  ; gray30
 193     ("brightred"      9 (255   0   0))  ; red
 194     ("brightgreen"   10 (  0 255   0))  ; green
 195     ("brightyellow"  11 (255 255   0))  ; yellow
 196     ("brightblue"    12 (  0   0 255))  ; blue
 197     ("brightmagenta" 13 (255   0 255))  ; magenta
 198     ("brightcyan"    14 (  0 255 255))  ; cyan
 199     ("brightwhite"   15 (255 255 255))) ; white
 200   "Names of 16 standard rxvt colors, their numbers, and RGB values.")
 201
 202 (defun rxvt-rgb-convert-to-16bit (prim)
 203   "Convert an 8-bit primary color value PRIM to a corresponding 16-bit value."
 204   (min 65535 (round (* (/ prim 255.0) 65535.0))))
 205
 206 (defun rxvt-register-default-colors ()
 207   "Register the default set of colors for rxvt or compatible emulator.
 208
 209 This function registers the number of colors returned by `display-color-cells'
 210 for the currently selected frame."
 211   (let* ((ncolors (display-color-cells))
 212          (colors rxvt-standard-colors)
 213          (color (car colors)))
 214     (if (> ncolors 0)
 215         ;; Clear the 8 default tty colors registered by startup.el
 216         (tty-color-clear))
 217     ;; Only register as many colors as are supported by the display.
 218     (while (and (> ncolors 0) colors)
 219       (tty-color-define (car color) (cadr color)
 220                         (mapcar 'rxvt-rgb-convert-to-16bit
 221                                 (car (cddr color))))
 222       (setq colors (cdr colors)
 223             color (car colors)
 224             ncolors (1- ncolors)))
 225     (when (> ncolors 0)
 226       (cond
 227        ((= ncolors 240)                 ; 256-color rxvt
 228         ;; 216 non-gray colors first
 229         (let ((r 0) (g 0) (b 0))
 230           (while (> ncolors 24)
 231             ;; This and other formulas taken from 256colres.pl and
 232             ;; 88colres.pl in the xterm distribution.
 233             (tty-color-define (format "color-%d" (- 256 ncolors))
 234                               (- 256 ncolors)
 235                               (mapcar 'rxvt-rgb-convert-to-16bit
 236                                       (list (round (* r 42.5))
 237                                             (round (* g 42.5))
 238                                             (round (* b 42.5)))))
 239             (setq b (1+ b))
 240             (if (> b 5)
 241                 (setq g (1+ g)
 242                       b 0))
 243             (if (> g 5)
 244                 (setq r (1+ r)
 245                       g 0))
 246             (setq ncolors (1- ncolors))))
 247         ;; Now the 24 gray colors
 248         (while (> ncolors 0)
 249           (setq color (rxvt-rgb-convert-to-16bit (+ 8 (* (- 24 ncolors) 10))))
 250           (tty-color-define (format "color-%d" (- 256 ncolors))
 251                             (- 256 ncolors)
 252                             (list color color color))
 253           (setq ncolors (1- ncolors))))
 254
 255        ((= ncolors 72) ; rxvt-unicode
 256         ;; 64 non-gray colors
 257         (let ((levels '(0 139 205 255))
 258               (r 0) (g 0) (b 0))
 259           (while (> ncolors 8)
 260             (tty-color-define (format "color-%d" (- 88 ncolors))
 261                               (- 88 ncolors)
 262                               (mapcar 'rxvt-rgb-convert-to-16bit
 263                                       (list (nth r levels)
 264                                             (nth g levels)
 265                                             (nth b levels))))
 266             (setq b (1+ b))
 267             (if (> b 3)
 268                 (setq g (1+ g)
 269                       b 0))
 270             (if (> g 3)
 271                 (setq r (1+ r)
 272                       g 0))
 273             (setq ncolors (1- ncolors))))
 274         ;; Now the 8 gray colors
 275         (while (> ncolors 0)
 276           (setq color (rxvt-rgb-convert-to-16bit
 277                        (floor
 278                         (if (= ncolors 8)
 279                             46.36363636
 280                           (+ (* (- 8 ncolors) 23.18181818) 69.54545454)))))
 281           (tty-color-define (format "color-%d" (- 88 ncolors))
 282                             (- 88 ncolors)
 283                             (list color color color))
 284           (setq ncolors (1- ncolors))))
 285        (t (error "Unsupported number of rxvt colors (%d)" (+ 16 ncolors)))))
 286     ;; Modifying color mappings means realized faces don't use the
 287     ;; right colors, so clear them.
 288     (clear-face-cache)))
 289
 290 ;; rxvt puts the default colors into an environment variable
 291 ;; COLORFGBG.  We use this to set the background mode in a more
 292 ;; intelligent way than the default guesswork in startup.el.
 293 (defun rxvt-set-background-mode ()
 294   "Set background mode as appropriate for the default rxvt colors."
 295   (let ((fgbg (getenv "COLORFGBG"))
 296         bg rgb)
 297     (set-terminal-parameter nil 'background-mode 'light)
 298     (when (and fgbg
 299                (string-match ".*;\\([0-9][0-9]?\\)\\'" fgbg))
 300       (setq bg (string-to-number (substring fgbg (match-beginning 1))))
 301       ;; The next line assumes that rxvt-standard-colors are ordered
 302       ;; by the color index in the ascending order!
 303       (setq rgb (car (cddr (nth bg rxvt-standard-colors))))
 304       ;; See the commentary in frame-set-background-mode about the
 305       ;; computation below.
 306       (if (< (apply '+ rgb)
 307              ;; The following line assumes that white is the 15th
 308              ;; color in rxvt-standard-colors.
 309              (* (apply '+ (car (cddr (nth 15 rxvt-standard-colors)))) 0.6))
 310           (set-terminal-parameter nil 'background-mode 'dark)))))
 311
 312 ;;; rxvt.el ends here