使用shell切换触摸板的方法

我们可以使用 xinput 来管理输入设备。

首先我们使用 xinput list 来获取输入设备的id号：

xinput list

⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ YSPRINGTECH USB OPTICAL MOUSE             id=10   [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad                id=13   [slave  pointer  (2)]
⎜   ↳ TPPS/2 IBM TrackPoint                     id=14   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Video Bus                                 id=8    [slave  keyboard (3)]
    ↳ Sleep Button                              id=9    [slave  keyboard (3)]
    ↳ Integrated Camera: Integrated C           id=11   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=12   [slave  keyboard (3)]
    ↳ ThinkPad Extra Buttons                    id=15   [slave  keyboard (3)]

触摸板的关键字是 TouchPad,因此我们可以通过下面命令来获取触摸板的id号:

xinput list | grep -iEo 'touchpad.*id=[0-9]{1,2}' | grep -Eo '[0-9]{1,2}'

下一步我们通过这个id号查看对应设备的状态:

xinput list-props 13

Device 'SynPS/2 Synaptics TouchPad':
        Device Enabled (162):   1
        Coordinate Transformation Matrix (164): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        libinput Tapping Enabled (315): 0
        libinput Tapping Enabled Default (316): 0
        libinput Tapping Drag Enabled (317):    1
        libinput Tapping Drag Enabled Default (318):    1
        libinput Tapping Drag Lock Enabled (319):       0
        libinput Tapping Drag Lock Enabled Default (320):       0
        libinput Tapping Button Mapping Enabled (321):  1, 0
        libinput Tapping Button Mapping Default (322):  1, 0
        libinput Natural Scrolling Enabled (297):       0
        libinput Natural Scrolling Enabled Default (298):       0
        libinput Disable While Typing Enabled (323):    1
        libinput Disable While Typing Enabled Default (324):    1
        libinput Scroll Methods Available (299):        1, 1, 0
        libinput Scroll Method Enabled (300):   1, 0, 0
        libinput Scroll Method Enabled Default (301):   1, 0, 0
        libinput Accel Speed (306):     0.000000
        libinput Accel Speed Default (307):     0.000000
        libinput Left Handed Enabled (311):     0
        libinput Left Handed Enabled Default (312):     0
        libinput Send Events Modes Available (282):     1, 1
        libinput Send Events Mode Enabled (283):        0, 0
        libinput Send Events Mode Enabled Default (284):        0, 0
        Device Node (285):      "/dev/input/event10"
        Device Product ID (286):        2, 7
        libinput Drag Lock Buttons (313):       <no items>
        libinput Horizontal Scroll Enabled (314):       1

这里 Device Enabled (162): 1 中的 1 就是状态. 所以我们可以通过下面命令来获取状态

xinput list-props 13|grep 'Device Enabled'|awk '{print $4}'

这里的 1 表示设备被启用， 0 表示设备被禁用。

获取了设备状态后，我们就可以通过 xinput disable $ID 或 xinput enable $ID 来禁用或启用设备。

最终得到的接本如下:

#!/bin/bash

declare -i ID
ID=$(xinput list | grep -iEo 'Touchpad.*id=[0-9]{1,2}' | grep -Eo '[0-9]{1,2}')
declare -i STATE
STATE=$(xinput list-props $ID|grep 'Device Enabled'|awk '{print $4}')
if [ $STATE -eq 1 ]
then
    xinput disable $ID
    echo "Touchpad disabled."
    # notify-send -a 'Touchpad' 'Disabled' -i /usr/share/icons/Adwaita/48x48/devices/input-touchpad*.png
else
    xinput enable $ID
    echo "Touchpad enabled."
    # notify-send -a 'Touchpad' 'Enabled' -i /usr/share/icons/Adwaita/48x48/devices/input-touchpad*.png
fi