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c5504d1005
emacs/lisp/term/xterm.el
Stefan Monnier 500dce5f4d * lisp/emacs-lisp/smie.el (smie--hanging-eolp-function): New var. 
(smie-indent--hanging-p): Use it.
* lisp/progmodes/sh-script.el (sh-set-shell): Set it.

Fixes: debbugs:17621
2014-06-19 21:05:40 -04:00

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;;; xterm.el --- define function key sequences and standard colors for xterm -*- lexical-binding: t -*-
;; Copyright (C) 1995, 2001-2014 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(defgroup xterm nil
"XTerm support."
:version "24.1"
:group 'terminals)
(defcustom xterm-extra-capabilities 'check
"Whether Xterm supports some additional, more modern, features.
If nil, just assume that it does not.
If `check', try to check if it does.
If a list, assume that the listed features are supported, without checking.
The relevant features are:
modifyOtherKeys -- if supported, more key bindings work (e.g., \"\\C-,\")
reportBackground -- if supported, Xterm reports its background color"
:version "24.1"
:group 'xterm
:type '(choice (const :tag "No" nil)
(const :tag "Check" check)
;; NOTE: If you add entries here, make sure to update
;; `tocheck-capabilities' in `terminal-init-xterm' as well.
(set (const :tag "modifyOtherKeys support" modifyOtherKeys)
(const :tag "report background" reportBackground))))
(defvar xterm-function-map
(let ((map (make-sparse-keymap)))
;; xterm from X.org 6.8.2 uses these key definitions.
(define-key map "\eOP" [f1])
(define-key map "\eOQ" [f2])
(define-key map "\eOR" [f3])
(define-key map "\eOS" [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 "\eO2P" [S-f1])
(define-key map "\eO2Q" [S-f2])
(define-key map "\eO2R" [S-f3])
(define-key map "\eO2S" [S-f4])
(define-key map "\e[1;2P" [S-f1])
(define-key map "\e[1;2Q" [S-f2])
(define-key map "\e[1;2R" [S-f3])
(define-key map "\e[1;2S" [S-f4])
(define-key map "\e[15;2~" [S-f5])
(define-key map "\e[17;2~" [S-f6])
(define-key map "\e[18;2~" [S-f7])
(define-key map "\e[19;2~" [S-f8])
(define-key map "\e[20;2~" [S-f9])
(define-key map "\e[21;2~" [S-f10])
(define-key map "\e[23;2~" [S-f11])
(define-key map "\e[24;2~" [S-f12])
(define-key map "\eO5P" [C-f1])
(define-key map "\eO5Q" [C-f2])
(define-key map "\eO5R" [C-f3])
(define-key map "\eO5S" [C-f4])
(define-key map "\e[15;5~" [C-f5])
(define-key map "\e[17;5~" [C-f6])
(define-key map "\e[18;5~" [C-f7])
(define-key map "\e[19;5~" [C-f8])
(define-key map "\e[20;5~" [C-f9])
(define-key map "\e[21;5~" [C-f10])
(define-key map "\e[23;5~" [C-f11])
(define-key map "\e[24;5~" [C-f12])
(define-key map "\eO6P" [C-S-f1])
(define-key map "\eO6Q" [C-S-f2])
(define-key map "\eO6R" [C-S-f3])
(define-key map "\eO6S" [C-S-f4])
(define-key map "\e[15;6~" [C-S-f5])
(define-key map "\e[17;6~" [C-S-f6])
(define-key map "\e[18;6~" [C-S-f7])
(define-key map "\e[19;6~" [C-S-f8])
(define-key map "\e[20;6~" [C-S-f9])
(define-key map "\e[21;6~" [C-S-f10])
(define-key map "\e[23;6~" [C-S-f11])
(define-key map "\e[24;6~" [C-S-f12])
(define-key map "\eO3P" [M-f1])
(define-key map "\eO3Q" [M-f2])
(define-key map "\eO3R" [M-f3])
(define-key map "\eO3S" [M-f4])
(define-key map "\e[15;3~" [M-f5])
(define-key map "\e[17;3~" [M-f6])
(define-key map "\e[18;3~" [M-f7])
(define-key map "\e[19;3~" [M-f8])
(define-key map "\e[20;3~" [M-f9])
(define-key map "\e[21;3~" [M-f10])
(define-key map "\e[23;3~" [M-f11])
(define-key map "\e[24;3~" [M-f12])
(define-key map "\eO4P" [M-S-f1])
(define-key map "\eO4Q" [M-S-f2])
(define-key map "\eO4R" [M-S-f3])
(define-key map "\eO4S" [M-S-f4])
(define-key map "\e[15;4~" [M-S-f5])
(define-key map "\e[17;4~" [M-S-f6])
(define-key map "\e[18;4~" [M-S-f7])
(define-key map "\e[19;4~" [M-S-f8])
(define-key map "\e[20;4~" [M-S-f9])
(define-key map "\e[21;4~" [M-S-f10])
(define-key map "\e[23;4~" [M-S-f11])
(define-key map "\e[24;4~" [M-S-f12])
(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 "\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;2F" [S-end])
(define-key map "\e[1;2H" [S-home])
(define-key map "\e[1;4A" [M-S-up])
(define-key map "\e[1;4B" [M-S-down])
(define-key map "\e[1;4C" [M-S-right])
(define-key map "\e[1;4D" [M-S-left])
(define-key map "\e[1;4F" [M-S-end])
(define-key map "\e[1;4H" [M-S-home])
(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[1;5F" [C-end])
(define-key map "\e[1;5H" [C-home])
(define-key map "\e[1;6A" [C-S-up])
(define-key map "\e[1;6B" [C-S-down])
(define-key map "\e[1;6C" [C-S-right])
(define-key map "\e[1;6D" [C-S-left])
(define-key map "\e[1;6F" [C-S-end])
(define-key map "\e[1;6H" [C-S-home])
(define-key map "\e[1;7A" [C-M-up])
(define-key map "\e[1;7B" [C-M-down])
(define-key map "\e[1;7C" [C-M-right])
(define-key map "\e[1;7D" [C-M-left])
(define-key map "\e[1;7F" [C-M-end])
(define-key map "\e[1;7H" [C-M-home])
(define-key map "\e[1;8A" [C-M-S-up])
(define-key map "\e[1;8B" [C-M-S-down])
(define-key map "\e[1;8C" [C-M-S-right])
(define-key map "\e[1;8D" [C-M-S-left])
(define-key map "\e[1;8F" [C-M-S-end])
(define-key map "\e[1;8H" [C-M-S-home])
(define-key map "\e[1;3A" [M-up])
(define-key map "\e[1;3B" [M-down])
(define-key map "\e[1;3C" [M-right])
(define-key map "\e[1;3D" [M-left])
(define-key map "\e[1;3F" [M-end])
(define-key map "\e[1;3H" [M-home])
(define-key map "\e[2~" [insert])
(define-key map "\e[3~" [delete])
(define-key map "\e[5~" [prior])
(define-key map "\e[6~" [next])
(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;4~" [M-S-insert])
(define-key map "\e[3;4~" [M-S-delete])
(define-key map "\e[5;4~" [M-S-prior])
(define-key map "\e[6;4~" [M-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 "\e[2;6~" [C-S-insert])
(define-key map "\e[3;6~" [C-S-delete])
(define-key map "\e[5;6~" [C-S-prior])
(define-key map "\e[6;6~" [C-S-next])
(define-key map "\e[2;7~" [C-M-insert])
(define-key map "\e[3;7~" [C-M-delete])
(define-key map "\e[5;7~" [C-M-prior])
(define-key map "\e[6;7~" [C-M-next])
(define-key map "\e[2;8~" [C-M-S-insert])
(define-key map "\e[3;8~" [C-M-S-delete])
(define-key map "\e[5;8~" [C-M-S-prior])
(define-key map "\e[6;8~" [C-M-S-next])
(define-key map "\e[2;3~" [M-insert])
(define-key map "\e[3;3~" [M-delete])
(define-key map "\e[5;3~" [M-prior])
(define-key map "\e[6;3~" [M-next])
(define-key map "\e[4~" [select])
(define-key map "\e[29~" [print])
(define-key map "\eOj" [kp-multiply])
(define-key map "\eOk" [kp-add])
(define-key map "\eOl" [kp-separator])
(define-key map "\eOm" [kp-subtract])
(define-key map "\eOo" [kp-divide])
(define-key map "\eOp" [kp-0])
(define-key map "\eOq" [kp-1])
(define-key map "\eOr" [kp-2])
(define-key map "\eOs" [kp-3])
(define-key map "\eOt" [kp-4])
(define-key map "\eOu" [kp-5])
(define-key map "\eOv" [kp-6])
(define-key map "\eOw" [kp-7])
(define-key map "\eOx" [kp-8])
(define-key map "\eOy" [kp-9])
;; These keys are available in xterm starting from version 216
;; if the modifyOtherKeys resource is set to 1.
(dolist (bind '((5 9 [C-tab])
(5 13 [C-return])
(5 39 [?\C-\'])
(5 44 [?\C-,])
(5 45 [?\C--])
(5 46 [?\C-.])
(5 47 [?\C-/])
(5 48 [?\C-0])
(5 49 [?\C-1])
;; Not all C-DIGIT keys have a distinct binding.
(5 57 [?\C-9])
(5 59 [?\C-\;])
(5 61 [?\C-=])
(5 92 [?\C-\\])
(6 33 [?\C-!])
(6 34 [?\C-\"])
(6 35 [?\C-#])
(6 36 [?\C-$])
(6 37 [?\C-%])
(6 38 [?\C-&])
(6 40 [?\C-\(])
(6 41 [?\C-\)])
(6 42 [?\C-*])
(6 43 [?\C-+])
(6 58 [?\C-:])
(6 60 [?\C-<])
(6 62 [?\C->])
(6 63 [(control ??)])
;; These are the strings emitted for various C-M-
;; combinations for keyboards whose Meta and Alt
;; modifiers are on the same key (usually labeled "Alt").
(13 9 [C-M-tab])
(13 13 [C-M-return])
(13 39 [?\C-\M-\'])
(13 44 [?\C-\M-,])
(13 45 [?\C-\M--])
(13 46 [?\C-\M-.])
(13 47 [?\C-\M-/])
(13 48 [?\C-\M-0])
(13 49 [?\C-\M-1])
(13 50 [?\C-\M-2])
(13 51 [?\C-\M-3])
(13 52 [?\C-\M-4])
(13 53 [?\C-\M-5])
(13 54 [?\C-\M-6])
(13 55 [?\C-\M-7])
(13 56 [?\C-\M-8])
(13 57 [?\C-\M-9])
(13 59 [?\C-\M-\;])
(13 61 [?\C-\M-=])
(13 92 [?\C-\M-\\])
(14 33 [?\C-\M-!])
(14 34 [?\C-\M-\"])
(14 35 [?\C-\M-#])
(14 36 [?\C-\M-$])
(14 37 [?\C-\M-%])
(14 38 [?\C-\M-&])
(14 40 [?\C-\M-\(])
(14 41 [?\C-\M-\)])
(14 42 [?\C-\M-*])
(14 43 [?\C-\M-+])
(14 58 [?\C-\M-:])
(14 60 [?\C-\M-<])
(14 62 [?\C-\M->])
(14 63 [(control meta ??)])
(7 9 [C-M-tab])
(7 13 [C-M-return])
(7 32 [?\C-\M-\s])
(7 39 [?\C-\M-\'])
(7 44 [?\C-\M-,])
(7 45 [?\C-\M--])
(7 46 [?\C-\M-.])
(7 47 [?\C-\M-/])
(7 48 [?\C-\M-0])
(7 49 [?\C-\M-1])
(7 50 [?\C-\M-2])
(7 51 [?\C-\M-3])
(7 52 [?\C-\M-4])
(7 53 [?\C-\M-5])
(7 54 [?\C-\M-6])
(7 55 [?\C-\M-7])
(7 56 [?\C-\M-8])
(7 57 [?\C-\M-9])
(7 59 [?\C-\M-\;])
(7 61 [?\C-\M-=])
(7 92 [?\C-\M-\\])
(8 33 [?\C-\M-!])
(8 34 [?\C-\M-\"])
(8 35 [?\C-\M-#])
(8 36 [?\C-\M-$])
(8 37 [?\C-\M-%])
(8 38 [?\C-\M-&])
(8 40 [?\C-\M-\(])
(8 41 [?\C-\M-\)])
(8 42 [?\C-\M-*])
(8 43 [?\C-\M-+])
(8 58 [?\C-\M-:])
(8 60 [?\C-\M-<])
(8 62 [?\C-\M->])
(8 63 [(control meta ??)])
(2 9 [S-tab])
(2 13 [S-return])
(6 9 [C-S-tab])
(6 13 [C-S-return])))
(define-key map
(format "\e[27;%d;%d~" (nth 0 bind) (nth 1 bind)) (nth 2 bind))
;; For formatOtherKeys=1, the sequence is a bit shorter (bug#13839).
(define-key map
(format "\e[%d;%du" (nth 1 bind) (nth 0 bind)) (nth 2 bind)))
;; Other versions of xterm might emit these.
(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 "\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])
(define-key map "\e[11~" [f1])
(define-key map "\e[12~" [f2])
(define-key map "\e[13~" [f3])
(define-key map "\e[14~" [f4])
map)
"Function key map overrides for xterm.")
(defvar xterm-alternatives-map
(let ((map (make-sparse-keymap)))
;; The terminal initialization C code file might have initialized
;; function keys F13->F60 from the termcap/terminfo information.
;; On a PC-style keyboard these keys correspond to
;; MODIFIER-FUNCTION_KEY, where modifier is S-, C, A-, C-S-. The code
;; here substitutes the corresponding definitions in function-key-map.
;; The mapping from escape sequences to Fn is done in input-decode-map
;; whereas this here mapping is done in local-function-key-map so that
;; bindings to f45 still work, in case your keyboard really has an f45
;; key rather than C-S-f9.
(define-key map [f13] [S-f1])
(define-key map [f14] [S-f2])
(define-key map [f15] [S-f3])
(define-key map [f16] [S-f4])
(define-key map [f17] [S-f5])
(define-key map [f18] [S-f6])
(define-key map [f19] [S-f7])
(define-key map [f20] [S-f8])
(define-key map [f21] [S-f9])
(define-key map [f22] [S-f10])
(define-key map [f23] [S-f11])
(define-key map [f24] [S-f12])
(define-key map [f25] [C-f1])
(define-key map [f26] [C-f2])
(define-key map [f27] [C-f3])
(define-key map [f28] [C-f4])
(define-key map [f29] [C-f5])
(define-key map [f30] [C-f6])
(define-key map [f31] [C-f7])
(define-key map [f32] [C-f8])
(define-key map [f33] [C-f9])
(define-key map [f34] [C-f10])
(define-key map [f35] [C-f11])
(define-key map [f36] [C-f12])
(define-key map [f37] [C-S-f1])
(define-key map [f38] [C-S-f2])
(define-key map [f39] [C-S-f3])
(define-key map [f40] [C-S-f4])
(define-key map [f41] [C-S-f5])
(define-key map [f42] [C-S-f6])
(define-key map [f43] [C-S-f7])
(define-key map [f44] [C-S-f8])
(define-key map [f45] [C-S-f9])
(define-key map [f46] [C-S-f10])
(define-key map [f47] [C-S-f11])
(define-key map [f48] [C-S-f12])
(define-key map [f49] [M-f1])
(define-key map [f50] [M-f2])
(define-key map [f51] [M-f3])
(define-key map [f52] [M-f4])
(define-key map [f53] [M-f5])
(define-key map [f54] [M-f6])
(define-key map [f55] [M-f7])
(define-key map [f56] [M-f8])
(define-key map [f57] [M-f9])
(define-key map [f58] [M-f10])
(define-key map [f59] [M-f11])
(define-key map [f60] [M-f12])
map)
"Keymap of possible alternative meanings for some keys.")
;; List of terminals for which modify-other-keys has been turned on.
(defvar xterm-modify-other-keys-terminal-list nil)
(defun xterm--report-background-handler ()
(let ((str "")
chr)
;; The reply should be: \e ] 11 ; rgb: NUMBER1 / NUMBER2 / NUMBER3 \e \\
(while (and (setq chr (read-event nil nil 2)) (not (equal chr ?\\)))
(setq str (concat str (string chr))))
(when (string-match
"rgb:\\([a-f0-9]+\\)/\\([a-f0-9]+\\)/\\([a-f0-9]+\\)" str)
(let ((recompute-faces
(xterm-maybe-set-dark-background-mode
(string-to-number (match-string 1 str) 16)
(string-to-number (match-string 2 str) 16)
(string-to-number (match-string 3 str) 16))))
;; Recompute faces here in case the background mode was
;; set to dark. We used to call
;; `tty-set-up-initial-frame-faces' only once, but that
;; caused the light background faces to be computed
;; incorrectly. See:
;; http://permalink.gmane.org/gmane.emacs.devel/119627
(when recompute-faces
(tty-set-up-initial-frame-faces))))))
(defun xterm--version-handler ()
(let ((str "")
chr)
;; The reply should be: \e [ > NUMBER1 ; NUMBER2 ; NUMBER3 c
;; If the timeout is completely removed for read-event, this
;; might hang for terminals that pretend to be xterm, but don't
;; respond to this escape sequence. RMS' opinion was to remove
;; it completely. That might be right, but let's first try to
;; see if by using a longer timeout we get rid of most issues.
(while (and (setq chr (read-event nil nil 2)) (not (equal chr ?c)))
(setq str (concat str (string chr))))
;; Since xterm-280, the terminal type (NUMBER1) is now 41 instead of 0.
(when (string-match "\\([0-9]+\\);\\([0-9]+\\);0" str)
(let ((version (string-to-number (match-string 2 str))))
(when (and (> version 2000) (equal (match-string 1 str) "1"))
;; Hack attack! bug#16988: gnome-terminal reports "1;NNNN;0"
;; with a large NNNN but is based on a rather old xterm code.
;; Gnome terminal 3.6.1 reports 1;3406;0
;; Gnome terminal 2.32.1 reports 1;2802;0
(setq version 200))
(when (equal (match-string 1 str) "83")
;; `screen' (which returns 83;40003;0) seems to also lack support for
;; some of these (bug#17607).
(setq version 240))
;; If version is 242 or higher, assume the xterm supports
;; reporting the background color (TODO: maybe earlier
;; versions do too...)
(when (>= version 242)
(xterm--query "\e]11;?\e\\"
'(("\e]11;" . xterm--report-background-handler))))
;; If version is 216 (the version when modifyOtherKeys was
;; introduced) or higher, initialize the
;; modifyOtherKeys support.
(when (>= version 216)
(terminal-init-xterm-modify-other-keys))))))
(defun xterm--query (query handlers)
"Send QUERY string to the terminal and watch for a response.
HANDLERS is an alist with elements of the form (STRING . FUNCTION).
We run the first FUNCTION whose STRING matches the input events."
;; We used to query synchronously, but the need to use `discard-input' is
;; rather annoying (bug#6758). Maybe we could always use the asynchronous
;; approach, but it's less tested.
;; FIXME: Merge the two branches.
(if (input-pending-p)
(progn
(dolist (handler handlers)
(define-key input-decode-map (car handler)
(lambda (&optional _prompt)
;; Unregister the handler, since we don't expect further answers.
(dolist (handler handlers)
(define-key input-decode-map (car handler) nil))
(funcall (cdr handler))
[])))
(send-string-to-terminal query))
;; Pending input can be mistakenly returned by the calls to
;; read-event below. Discard it.
(send-string-to-terminal query)
(while handlers
(let ((handler (pop handlers))
(i 0))
(while (and (< i (length (car handler)))
(let ((evt (read-event nil nil 2)))
(or (eq evt (aref (car handler) i))
(progn (if evt (push evt unread-command-events))
nil))))
(setq i (1+ i)))
(if (= i (length (car handler)))
(progn (setq handlers nil)
(funcall (cdr handler)))
(while (> i 0)
(push (aref (car handler) (setq i (1- i)))
unread-command-events)))))))
(defun terminal-init-xterm ()
"Terminal initialization function for xterm."
;; rxvt terminals sometimes set the TERM variable to "xterm", but
;; rxvt's keybindings are incompatible with xterm's. It is
;; better in that case to use rxvt's initialization function.
(if (and (getenv "COLORTERM" (selected-frame))
(string-match "\\`rxvt" (getenv "COLORTERM" (selected-frame))))
(tty-run-terminal-initialization (selected-frame) "rxvt")
(let ((map (copy-keymap xterm-alternatives-map)))
(set-keymap-parent map (keymap-parent local-function-key-map))
(set-keymap-parent local-function-key-map map))
(let ((map (copy-keymap xterm-function-map)))
;; Use inheritance to let the main keymap override those defaults.
;; This way we don't override terminfo-derived settings or settings
;; made in the init file.
(set-keymap-parent map (keymap-parent input-decode-map))
(set-keymap-parent input-decode-map map)))
(xterm-register-default-colors)
(tty-set-up-initial-frame-faces)
(if (eq xterm-extra-capabilities 'check)
;; Try to find out the type of terminal by sending a "Secondary
;; Device Attributes (DA)" query.
(xterm--query "\e[>0c"
;; Some terminals (like OS X's Terminal.app) respond to
;; this query as if it were a "Primary Device Attributes"
;; query instead, so we should handle that too.
'(("\e[?" . xterm--version-handler)
("\e[>" . xterm--version-handler)))
(when (memq 'reportBackground xterm-extra-capabilities)
(xterm--query "\e]11;?\e\\"
'(("\e]11;" . xterm--report-background-handler))))
(when (memq 'modifyOtherKeys xterm-extra-capabilities)
(terminal-init-xterm-modify-other-keys)))
(run-hooks 'terminal-init-xterm-hook))
(defun terminal-init-xterm-modify-other-keys ()
"Terminal initialization for xterm's modifyOtherKeys support."
;; Make sure that the modifyOtherKeys state is restored when
;; suspending, resuming and exiting.
(add-hook 'suspend-hook 'xterm-turn-off-modify-other-keys)
(add-hook 'suspend-resume-hook 'xterm-turn-on-modify-other-keys)
(add-hook 'kill-emacs-hook 'xterm-remove-modify-other-keys)
(add-hook 'delete-terminal-functions 'xterm-remove-modify-other-keys)
;; Add the selected frame to the list of frames that
;; need to deal with modify-other-keys.
(push (frame-terminal)
xterm-modify-other-keys-terminal-list)
(xterm-turn-on-modify-other-keys))
;; 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 0 238)) ; blue2
("magenta" 5 (205 0 205)) ; magenta3
("cyan" 6 ( 0 205 205)) ; cyan3
("white" 7 (229 229 229)) ; gray90
("brightblack" 8 (127 127 127)) ; gray50
("brightred" 9 (255 0 0)) ; red
("brightgreen" 10 ( 0 255 0)) ; green
("brightyellow" 11 (255 255 0)) ; yellow
("brightblue" 12 (92 92 255)) ; rgb:5c/5c/ff
("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."
(logior prim (lsh prim 8)))
(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 (selected-frame)))
(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 formulas 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 (if (zerop r) 0 (+ (* r 40) 55))
(if (zerop g) 0 (+ (* g 40) 55))
(if (zerop b) 0 (+ (* b 40) 55)))))
(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
(floor
(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)))
(defun xterm-turn-on-modify-other-keys ()
"Turn the modifyOtherKeys feature of xterm back on."
(let ((terminal (frame-terminal)))
(when (and (terminal-live-p terminal)
(memq terminal xterm-modify-other-keys-terminal-list))
(send-string-to-terminal "\e[>4;1m" terminal))))
(defun xterm-turn-off-modify-other-keys (&optional frame)
"Temporarily turn off the modifyOtherKeys feature of xterm."
(let ((terminal (when frame (frame-terminal frame))))
(when (and (terminal-live-p terminal)
(memq terminal xterm-modify-other-keys-terminal-list))
(send-string-to-terminal "\e[>4m" terminal))))
(defun xterm-remove-modify-other-keys (&optional terminal)
"Turn off the modifyOtherKeys feature of xterm for good."
(setq terminal (or terminal (frame-terminal)))
(when (and (terminal-live-p terminal)
(memq terminal xterm-modify-other-keys-terminal-list))
(setq xterm-modify-other-keys-terminal-list
(delq terminal xterm-modify-other-keys-terminal-list))
(send-string-to-terminal "\e[>4m" terminal)))
(defun xterm-maybe-set-dark-background-mode (redc greenc bluec)
;; Use the heuristic in `frame-set-background-mode' to decide if a
;; frame is dark.
(when (< (+ redc greenc bluec) (* .6 (+ 65535 65535 65535)))
(set-terminal-parameter nil 'background-mode 'dark)
t))
(provide 'xterm)
;;; xterm.el ends here
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