Re: master 3b41141708: Expose the name of an event's input device to Lisp

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

> My point is: Emacs should use the information about the device where
> it generates the Lispy event.  At that point, we should generate a
> different Lispy event for a device whose events we want to handle
> differently.  On the higher levels, the device information should not
> be necessary for processing those Lispy events.
>
> How does my point above contradict the data you show about these two
> devices?

> I hope my response above explains why I think the need to know the
> device info can and should stop at the level where we produce the
> Lispy event objects.

Hmm... how about a variable `device-function-key-alist', which maps
device names and classes to the corresponding function key?

The code to read events could then be changed to add such a function key
when an event is received for the suitable type of device.

For example, pixel-scroll-precision-mode could add ((class mouse)
. coarse-mouse) to that list, which would make events coming from a
mouse report themselves with the fake function key `coarse-mouse'.

Then, the command to scroll with interpolation could be bound to
[coarse-mouse wheel-down].

Or Lars could specify ("Name of footpad device" . footpad), and bind the
appropriate commands to [footpad a], [footpad b] and so on?

WDYT?