1892102 - Overscroll at the top goes sideways on Android

Status: NEW

(GeckoView :: General, defect)

Description

[Markus Stange [:mstange]]

Steps to reproduce:

• Open a simple website in Firefox for Android, such as https://en.m.wikipedia.org/wiki/Main_Page
• Drag you finger up (scrolling down), then down, and attempt to overscroll at the top.

Expected results:
The page should stretch vertically.

Actual results:
The page does not stretch vertically.
But if you Drag your finger to the left, then the page stretches horizontally! That's unexpected because the page is not scrollable horizontally.

Comment 1

[Hiroyuki Ikezoe (:hiro)]

This is likely an issue inside GeckoView overscroll implementation. I confirmed this updateOverscrollOffset function gets called on Android emulator.

Comment 2

[Botond Ballo [:botond]]

(In reply to Hiroyuki Ikezoe (:hiro) from comment #1)

This is likely an issue inside GeckoView overscroll implementation. I confirmed this updateOverscrollOffset function gets called on Android emulator.

I think this tells us that the part about vertical overscroll not happening is an issue in GeckoView.

But the part about horizontal overscroll happening when it shouldn't seems like something we have control over in APZ -- should we spin that out into a separate bug?

Comment 3

[Hiroyuki Ikezoe (:hiro)]

(In reply to Botond Ballo [:botond] from comment #2)

(In reply to Hiroyuki Ikezoe (:hiro) from comment #1)

This is likely an issue inside GeckoView overscroll implementation. I confirmed this updateOverscrollOffset function gets called on Android emulator.

I think this tells us that the part about vertical overscroll not happening is an issue in GeckoView.

But the part about horizontal overscroll happening when it shouldn't seems like something we have control over in APZ -- should we spin that out into a separate bug?

Yeah, filed bug 1892177.

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:boek, could you have a look please?

For more information, please visit BugBot documentation.

Comment 5

[BugBot [:suhaib / :marco/ :calixte]]

The component has been changed since the backlog priority was decided, so we're resetting it.
For more information, please visit BugBot documentation.