1702949 - Keep pan momentum scrolling once after overscroll animation finished

Status: NEW

(Core :: Panning and Zooming, defect, P2)

Description

[Hiroyuki Ikezoe (:hiro)]

This is (will be) a follow-up issue of bug 1700215.

In bug 1700215, I've been trying to mimic Chrome's overscroll behavior, there is a case that I haven't solved yet. One typical case of the case is if the user tries to overscroll horizontally first by panning, then the user flings vertically, then we will have a horizontal overscroll animation and vertical scrolling by pan momentum at the same time, then if the overscroll animation finished but pan momentum events keeps happening, we will not use the pan momentum events further because we set the APZC state to NOTHING so subsequent pan momentum scrolling stops at some point where the animation stop.

I haven't found any solution on this issue yet, but i think it's less noticeable so I am going to defer this issue into this bug.