我想知道是否有办法确定终端的背景颜色?
在我的情况下,使用gnome-terminal。 它可能很重要,因为它完全由终端应用程序绘制窗口的背景,甚至可能是纯色的东西。
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 $result | sed 's/[^rgb:0-9a-f/]\+$//'
来源/回购/要点:https://gist.github.com/blueyed/c8470c2aad3381c33ea3
\e]11;?\a
(\e
和\a
分别是ESC和BEL字符。)
Xterm兼容的终端应该以相同的顺序回复,问号由X11 colorspec替换,例如rgb:0000/0000/0000
为黑色。
除了apparently rxvt-only $COLORFGBG,我不知道还有其他任何东西存在。大多数人似乎是referring to如何vim does it,甚至这是一个受过良好教育的猜测。
一些链接:
xtermcontrol --get-bg
)
https://gist.github.com/blueyed/c8470c2aad3381c33ea3
https://github.com/rocky/bash-term-background/blob/master/term-background.shCOLORFGBG
环境变量(由Rxvt使用但其他人不多......):
它被设置为像<foreground-color>:[<other-setting>:]<background-color>
,(<other setting>:
是可选的),如果{0,1,2,3,4,5,6,8}中的<background-color>
,那么我们有一些黑暗的背景。例如。来自Neovim issue 2764的一些相关片段:
/*
* 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";
}
关于来自COLORFGBG
的Gnome BugZilla 733423 env:
在我刚刚尝试使用linux的很多终端中,只有urxvt和konsole设置了它(那些没有: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“浅黄色黑色”配色方案 - 那么为什么不“默认”而不是“15”?),而我的urxvt将它设置为“0;默认值; 15”(它实际上是白色的黑色 - 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代码(via):
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)
您是指确定终端背景颜色或设置终端颜色的方法吗?
如果是后者,您可以查询终端的PS1环境变量以获取颜色。
这里有一篇关于设置(以及推导出)终端颜色的文章:http://www.ibm.com/developerworks/linux/library/l-tip-prompt/