feat: Tap-to-click, natural scrolling and more. Add libinput pointer settings.

[chenx-dust]

For better experience, I added these useful parameters to change libinput pointer configs:

• --tap-to-click enable tap-to-click feature for pointer devices
• --tap-and-drag enable tap-and-drag feature for pointer devices
• --drag-lock enable drag-lock feature for pointer devices
• --natural-scrolling enable natural scrolling for ...
  • none => No pointer device
  • touchpad => Only for touchpad
  • mouse => Only for mouse
  • all => All pointer device

Btw, there are plenty of configurable things for libinput, should these options become a config file or sth else for setting up easily? (Ref. libinput document)

[misyltoad]

Does tap to click mirror what we already do for touch emulation elsewhere?

[chenx-dust]

Does tap to click mirror what we already do for touch emulation elsewhere?

Nope. libinput regards pointer (mouse, touchpad, etc.) and touchscreen as two different kinds of input. (Ref. wlserver_new_input function in src/wlserver.cpp) There shouldn't be any side effect on touch input. I haven't seen any mirror behavior happened in my real experience.

Btw, this pr is mostly for adjust touchpad experience. Tap-to-click is necessary for those devices with unclickable touchpad.

[chenx-dust]

I probably misunderstood your points. Do you mean there is some touch emulation for pointer input? Is there any other information? I'll look into it.

[misyltoad]

Ah tap as in trackpad. We should make that more explicit.

[chenx-dust]

Ah tap as in trackpad. We should make that more explicit.

Sorry for my vague sayings. libinput called these trackpad-like devices as "pointer", so I continued using it.

[chenx-dust]

Any news?

[misyltoad]

Sorry, I didn't get your email. :(

It looks fine to merge if you want to re-open.

[chenx-dust]

Sorry, I didn't get your email. :(

It looks fine to merge if you want to re-open.

Aha, actually I'm adding more setting options for this. It won't take long.

[chenx-dust]

#1406