prompted by jittery and/or random movement during tap gestures, lack
of edge motion, and a general desire to make use of the extra features
available with the native protocol.
- Ditch the kernel thread; it was overkill for the small amount of
processing required to deal with touchpad events.
- If we fail to probe a Synaptics touchpad, issue a RESET command
to ensure that whatever device is out there is left in a sane
state (thanks to Reinoud Zandijk for the hint).
- Completely re-write gesture support.
- Put the touchpad in 80 packets per second mode and count them so
they can be used to time gesture durations (instead of using
mono_time).
- Enhance up/down button support with options to use them to emulate
the middle button or Z-axis events (like a traditional wheel mouse).
- Add 'edge motion'. If a drag gesture is in progress, and the reported
finger position moves to the touchpad's border region, continue
to report movement events at a fixed rate as if the finger carried
on moving in the same direction. This restores some functionality
usually provided by the touchpad's firmware in PS/2 mode.
- Filter successive movement events to reduce jitter. When scaling
movement events, fold the remainder into the next event to prevent
loss of information during slow/small finger movements. Pointer
movement is now much more refined.
- Add support for touchpads which can report more than one finger on
the pad simultaneously. Optionally use this feature for middle/right
button emulation (i.e. tap two fingers to emulate middle button).
This feature is disabled by default (for now) to avoid surprise
pasting of clipboard text. ;-)
christos