分享：Linux下使用xrandr一键切换显示器

[woodongwong]

效果图：

链接：https://wiki.archlinux.org/index.php/xrandr#Example_3

下面是原文中的代码，将此脚本设置成快捷键，便可实现一键切换显示器。
xrandr好像只支持X11，不支持Wayland

#!/bin/bash

# get info from xrandr
connectedOutputs=$(xrandr | awk '$2 == "connected"{print $1}')
activeOutput=$(xrandr | grep -E " connected (primary )?[1-9]+" | sed -e "s/\([A-Z0-9]\+\) connected.*/\1/")

# initialize variables
execute="xrandr "
default="xrandr "
i=1
switch=0

for display in $connectedOutputs
do
    # build default configuration
    if [ $i -eq 1 ]
    then
        default=$default"--output $display --auto "
    else
        default=$default"--output $display --off "
    fi

    # build "switching" configuration
    if [ $switch -eq 1 ]
    then
        execute=$execute"--output $display --auto "
        switch=0
    else
        execute=$execute"--output $display --off "
    fi

    # check whether the next output should be switched on
    if [ $display = $activeOutput ]
    then
        switch=1
    fi

    i=$(( $i + 1 ))
done

# check if the default setup needs to be executed then run it
if ! (echo "$execute" | grep -q "auto")
then
    `$default`
else
    `$execute`
fi