从键盘到字符¶
软件版
计算机从键盘收到信号后发生了什么
Preliminaries¶
keyboard:¶
find id of touchpad:
xinput list | grep -i "Touchpad" | awk '{print $6}' | sed 's/[^0-9]//g'
似乎需要添加文件 /usr/share/X11/xorg.conf.d/30-touchpad.conf
Section "InputClass"
Identifier "MyTouchpad"
MatchIsTouchpad "on"
Driver "libinput"
Option "Tapping" "on"
EndSection
之后才能正常识别
touchpad：```xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ GXTP7863:00 27C6:01E0 Mouse id=11 [slave pointer (2)]
⎜ ↳ GXTP7863:00 27C6:01E0 Touchpad id=12 [slave pointer (2)]
⎜ ↳ HS6209 2.4G Wireless Receiver Keyboard id=9 [slave pointer (2)]
⎜ ↳ HS6209 2.4G Wireless Receiver Mouse id=10 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Video Bus id=6 [slave keyboard (3)]
↳ Power Button id=7 [slave keyboard (3)]
↳ Huawei WMI hotkeys id=13 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
否则只会识别两个设备，没有 `Mouse` `Touchpad`
```xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ GXTP7863:00 27C6:01E0 id=10 [slave pointer (2)]
⎜ ↳ GXTP7863:00 27C6:01E0 id=11 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Video Bus id=6 [slave keyboard (3)]
↳ Power Button id=7 [slave keyboard (3)]
↳ Huawei WMI hotkeys id=12 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=13 [slave keyboard (3)]
xev: find keycode; xmodmap: define keysym for each keycode (xkeycaps gui); setxkbmap: set keyboard layout; xcape: use a modifier as another key.
for example, caps as escape and ctrl
setxkbmap -option ctrl:swapcaps # swap ctrl and caps
setxkbmap -option ctrl:nocaps
xcape -e 'Alt_L=Escape' # Escape when tap, ALt when hold
# I usually use following
setxkbmap -option 'caps:ctrl_modifier' # caps become ctrl
xcape -e 'Caps_Lock=Escape'
usage of xmodmap:
modifier for X Window. mod1: left Alt, mod2: Num_Lock，mod3: no，mod4: Left Super (windows)，mod5: Shift
```xmodmap -pm
xmodmap: up to 4 keys per modifier, (keycodes in parentheses):
shift Shift_L (0x32), Shift_R (0x3e)
lock Caps_Lock (0x42)
control Control_L (0x25), Control_R (0x69)
mod1 Alt_L (0x40), Alt_R (0x6c), Alt_L (0xcc), Meta_L (0xcd)
mod2 Num_Lock (0x4d)
mod3 ISO_Level5_Shift (0xcb), Hyper_L (0xcf)
mod4 Super_L (0x85), Super_R (0x86), Super_L (0xce)
mod5 ISO_Level3_Shift (0x5c)
Keycode is what the kernal get, and keysym is what it gives. Each keysym column in the table corresponds to a particular combination of modifier keys:
1. Key
2. Shift+Key
3. Mode_switch+Key
4. Mode_switch+Shift+Key
5. ISO_Level3_Shift+Key
6. ISO_Level3_Shift+Shift+Key
check current keycode map:
```xmodmap -pke
keycode 8 =
keycode 9 = Escape NoSymbol Escape
keycode 10 = 1 exclam 1 exclam
keycode 11 = 2 at 2 at
keycode 12 = 3 numbersign 3 numbersign
keycode 13 = 4 dollar 4 dollar
keycode 14 = 5 percent 5 percent
keycode 15 = 6 asciicircum 6 asciicircum
keycode 16 = 7 ampersand 7 ampersand
keycode 17 = 8 asterisk 8 asterisk
keycode 18 = 9 parenleft 9 parenleft
keycode 19 = 0 parenright 0 parenright
...
keycode 34 = bracketleft braceleft bracketleft braceleft
keycode 35 = bracketright braceright bracketright braceright
keycode 36 = Return NoSymbol Return
keycode 37 = Control_L NoSymbol Control_L
keycode 38 = a A a A
keycode 39 = s S s S
keycode 40 = d D d D
keycode 41 = f F f F
keycode 42 = g G g G
keycode 43 = h H h H
keycode 67 = F1 F1 F1 F1 F1 F1 XF86Switch_VT_1
keycode 68 = F2 F2 F2 F2 F2 F2 XF86Switch_VT_2
...
another softwares:
- interception-tools with plugins
- dual-function-keys (like Mod-Tap feature of zmk and qmk)
- caps2esc
- space2meta
- keyd: this is sick.