如何确定终端的背景颜色?
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22-09-2019 - |
题
我想知道是否有任何方法可以确定终端的背景颜色?
就我而言,使用 gnome-terminal。
这可能很重要,因为完全由终端应用程序来绘制其窗口的背景,甚至可能不是纯色。
解决方案
我想出了以下内容:
#!/bin/sh
#
# Query a property from the terminal, e.g. background color.
#
# XTerm Operating System Commands
# "ESC ] Ps;Pt ST"
oldstty=$(stty -g)
# What to query?
# 11: text background
Ps=${1:-11}
stty raw -echo min 0 time 0
# stty raw -echo min 0 time 1
printf "\033]$Ps;?\033\\"
# xterm needs the sleep (or "time 1", but that is 1/10th second).
sleep 0.00000001
read -r answer
# echo $answer | cat -A
result=${answer#*;}
stty $oldstty
# Remove escape at the end.
echo $result | sed 's/[^rgb:0-9a-f/]\+$//'
源/回购/要点: https://gist.github.com/blueyed/c8470c2aad3381c33ea3
其他提示
这里有一个 xterm的控制序列以这样:
\e]11;?\a
(\e
和\a
是ESC和BEL字符,分别。)
的Xterm兼容终端应具有相同序列回复,与由X11 colorspec,例如取代的问号rgb:0000/0000/0000
为黑色。
除了明显的rxvt-仅$ COLORFGBG 的,我不知道别的,甚至存在。大多人似乎指的如何的 VIM它的,甚至是一个受过教育的猜测最好的。
一些链接:
- Xterm 转义代码:
- http://www.talisman.org/~erlkonig/documents/xterm-color-queries/
- https://invisible-island.net/xterm/ctlseqs/ctlseqs.html (动态颜色/请求 Termcap/Terminfo 字符串)
- http://thrysoee.dk/xtermcontrol/ (
xtermcontrol --get-bg
) - https://gist.github.com/blueyed/c8470c2aad3381c33ea3
- https://github.com/rocky/bash-term-background/blob/master/term-background.sh
COLORFGBG
环境变量(由 Rxvt 使用,但其他人没有使用......):
它被设置为某某<foreground-color>:[<other-setting>:]<background-color>
, (<other setting>:
是可选的),并且如果<background-color>
在 {0,1,2,3,4,5,6,8} 中,我们有一些深色背景。- 维姆:
- Emacs...(后台模式)(我认为它使用转义码)
- 相关问题/报告/讨论:
例如。一些相关片段 Neovim 问题 2764:
/*
* Return "dark" or "light" depending on the kind of terminal.
* This is just guessing! Recognized are:
* "linux" Linux console
* "screen.linux" Linux console with screen
* "cygwin" Cygwin shell
* "putty" Putty program
* We also check the COLORFGBG environment variable, which is set by
* rxvt and derivatives. This variable contains either two or three
* values separated by semicolons; we want the last value in either
* case. If this value is 0-6 or 8, our background is dark.
*/
static char_u *term_bg_default(void)
{
char_u *p;
if (STRCMP(T_NAME, "linux") == 0
|| STRCMP(T_NAME, "screen.linux") == 0
|| STRCMP(T_NAME, "cygwin") == 0
|| STRCMP(T_NAME, "putty") == 0
|| ((p = (char_u *)os_getenv("COLORFGBG")) != NULL
&& (p = vim_strrchr(p, ';')) != NULL
&& ((p[1] >= '0' && p[1] <= '6') || p[1] == '8')
&& p[2] == NUL))
return (char_u *)"dark";
return (char_u *)"light";
}
关于 COLORFGBG
环境,来自 侏儒 BugZilla 733423:
在我刚刚在 Linux 上尝试过的相当多的终端中,只有 urxvt 和 konsole 设置了它(那些没有设置的终端:xterm、st、术语、pterm)。Konsole 和 Urxvt 使用不同的语法和语义,即对我来说,konsole 将其设置为“0;15”(即使我使用“黑底浅黄”配色方案 - 那么为什么不选择“default”而不是“15”?),而我的 urxvt 将其设置为“0;default” ;15”(实际上是白底黑字 - 但为什么是三个字段?)。因此,这两个值都不符合您的规格。
这是我正在使用的一些自己的代码(通过):
def is_dark_terminal_background():
"""
:return: Whether we have a dark Terminal background color, or None if unknown.
We currently just check the env var COLORFGBG,
which some terminals define like "<foreground-color>:<background-color>",
and if <background-color> in {0,1,2,3,4,5,6,8}, then we have some dark background.
There are many other complex heuristics we could do here, which work in some cases but not in others.
See e.g. `here <https://stackoverflow.com/questions/2507337/terminals-background-color>`__.
But instead of adding more heuristics, we think that explicitly setting COLORFGBG would be the best thing,
in case it's not like you want it.
:rtype: bool|None
"""
if os.environ.get("COLORFGBG", None):
parts = os.environ["COLORFGBG"].split(";")
try:
last_number = int(parts[-1])
if 0 <= last_number <= 6 or last_number == 8:
return True
else:
return False
except ValueError: # not an integer?
pass
return None # unknown (and bool(None) == False, i.e. expect light by default)
你的意思是确定终端的背景色,或设置终端颜色的方法?
如果是后者,你可以查询终端的PS1环境变量来获取颜色。
有对这里设定(等导出)的终端的颜色的制品: http://www.ibm.com/developerworks/linux/library / 1-尖端提示/