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有没有办法确定终端的背景色?

gnome-terminal x11 terminal unix

Romuald Brunet · 技术社区 · 16 年前

我想知道有没有办法确定终端的背景色?

这可能很重要,因为要由终端应用程序来绘制其窗口的背景,甚至可能不是普通的颜色。

5 回复 | 直到 7 年前

blueyed 11 年前

我想到了以下几点:

#!/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

efdee 5 年前

有一个 xterm control sequence

\e]11;?\a

( \e 和 \a 分别是ESC和BEL字符。)

X11 color name ,例如。 rgb:0000/0000/0000 为了黑人。

Albert 7 年前

一些链接:

Xterm转义码:
COLORFGBG
它被设定为 <foreground-color>:[<other-setting>:]<background-color> , ( <other setting>: 是可选的),如果 <background-color>
维姆:
- 代码: https://github.com/vim/vim/blob/05c00c038bc16e862e17f9e5c8d5a72af6cf7788/src/option.c#L3974
- How does Vim guess background color on xterm?
Emacs(背景模式)(我认为它使用了转义码)

例如,来自 Neovim issue 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";
}

颜色FGBG 环境,从 Gnome BugZilla 733423 :

在我刚刚在linux上试过的很多终端中,只有urxvt和konsole设置了它(那些没有设置的:xterm、st、terminology和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”(尽管我使用的是“黑对淡黄”的配色方案-所以为什么不使用“default”而不是“15”?),而我的urxvt将其设置为“0;违约;“它实际上是黑白相间的,但为什么是三个区域呢?”。所以在这两种情况下,值都不符合您的规范。

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)

Albert 7 年前

apparently rxvt-only $COLORFGBG ,我不知道还有什么东西存在。大多数人似乎 referring to 怎样 vim does it ,即使这样,也只是一个有根据的猜测。

-1

goose_wh 16 年前

这里有一篇关于终端颜色设置的文章: http://www.ibm.com/developerworks/linux/library/l-tip-prompt/