[Bug] Tab tray collapses to semi-closed state when tapping on it

[hwinnemoe]

Steps to reproduce

1. Have the tab tray in its default open state with zero or only a few tabs
2. Tap on the area next to the buttons for PBM and normal browsing - try to not move your finger while tapping or use a long-press gesture

Expected behavior

I do not know what the expected behaviour here should be.

Actual behavior

The tab tray closes halfway. Doing this in landscape mode produces an even less useful result. Note: Same result as #13777 but different STR.

Device information

• Android device: Sony Xperia Z2, Android 6.0.1
• Fenix version: Nightly 200911 06:01 (Build #2015763249)
  AC: 58.0.20200908130811, 52ac53ba1
  GV: 82.0a1-20200907094115
  AS: 61.0.13

┆Issue is synchronized with this Jira Task

[hwinnemoe]

According to https://material.io/develop/android/components/sheets-bottom, "STATE_COLLAPSED: The bottom sheet is visible but only showing its peek height". Maybe this can be avoided by using setSkipCollapsed?

[boek]

@hwinnemoe you're right. 🤔 I think we had that set at one point. Will have to investigate what happened to it

[mcarare]

The state is actually STATE_HALF_EXPANDED. Can UX weigh in on the expected behavior? We could hide the tab tray completely instead of showing it half expanded, or we could just stick to the current behavior.

[topotropic]

@mcarare would it be possible that nothing happens when people just tap on the header part of the sheet?

[Mugurell]

Looked into this and saw that it's not really possible to disable STATE_HALF_EXPANDED while keeping also fitToContents = false.

fitToContents = false would disable STATE_HALF_EXPANDED but then we'd need to make some bigger changes in order for the UI to look the same as it is now. And I saw no clear specs about the tabs tray height in expanded/collapsed state or the offsets so this would mean more work.

What I'll go with is just setting a very small height for the tabs tray when in STATE_HALF_EXPANDED to effectively disable it. When swiping down on the tabs tray while in STATE_COLLAPSED the tray will still be able to transition to STATE_HALF_EXPANDED but the height of the tray will be miniscule and it will immediately be hidden so this troublesome state will be invisible to the users.

To respond to @topotropic to the question above: yes, I'll make it so that nothing will happen when users will tap the header part of the tray.

[AndiAJ]

Hi, verified as fixed on the latest Nightly Build 201105 using the following devices:
• Google Pixel 3a (Android 11)
• Huawei Mate 20 Lite (Android 10)
• OnePlus A3 (Android 6.0.1)

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