tree 815cb89bffa569cec3a7ad07227179d672545e10
parent 293041cac77386d5a782de721a1ee63a34556965
author Prabir Pradhan <prabirmsp@google.com> 1664307163 +0000
committer Prabir Pradhan <prabirmsp@google.com> 1664834879 +0000

Preserve multi-touch slot state when resetting input mappers

The existing pattern in InputReader is that when a mapper is reset, all
of its state is cleared and state of the buttons/axes is
queried through EventHub to rebuild the current state of the mapper.

This approach does not work for multi-touch devices, since there is no
way to query the current state of the contacts through the evdev
multi-touch protocol.

Since we cannot fully rebuild the current state of a multi-touch device,
we work around this limitation by never clearing the multi-touch state.

Bug: 248506674
Test: atest inputflinger_tests
Change-Id: Ic59d9fcb4e13fe262c422825c2485185004b719b
Merged-In: Ic59d9fcb4e13fe262c422825c2485185004b719b
(cherry picked from commit afabcde5a9ac2b77586d61ad4a226718130663c3)