951290 - [B2G] [Browser] The first swipe after zooming has no effect

Status: RESOLVED FIXED

(Core :: Panning and Zooming, defect)

Description

[Chris Kreinbring [:CKreinbring]]

Attachment: Clip of swipe attempts after zooming

Description:
After zooming in or out of a webpage, the first swipe made by the user to scroll the screen will be ignored.  The second and subsequent swipes do work normally.

Repro Steps:
1) Update Buri to Build ID: 20131216140918
2) Launch the Browser and navigate to a site that allows zooming (eg google.com).
3) Once the page loads, spread your fingers on the screen to zoom in.
4) Make a swipe gesture and observe the device's reaction.
5) Pinch your fingers on the screen to zoom back out to the original zoom.
6) Make a swipe gesture and observe the device's reaction.

Expected Results:
Making a swipe gesture after zooming in or out will scroll the screen in the direction of the swipe.

Actual Results:
Making a swipe gesture after zooming in or out does nothing.  A second swipe will work normally.

Additional Notes:
See attached video and logcat logs.
Occurs regardless of the APZ setting.

Environmental Variables:
Build : 
Gaia      504cf9a988cd84760b4040706ccc41e508a97fd2
Gecko     55b75ce2263e7d2a8cbfdabc7e5206d9caa89f98
BuildID   20131216140918
Version   28.0a2
ro.build.version.incremental=eng.archermind.20131114.105818
ro.build.date=Thu Nov 14 10:58:33 CST 2013
RIL Type : Mozilla RIL
OS Version: 1.3
Device: Buri

Comment 1

[Chris Kreinbring [:CKreinbring]]

Attachment: Log of swipe attempts after zooming

Comment 2

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

Do you know if this is a regression or if it happens in the browser in 1.2 ?

Comment 3

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

I wonder if this is a dupe of bug 951321?

Comment 4

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

(In reply to Vivien Nicolas (:vingtetun) (:21) from comment #3)
> I wonder if this is a dupe of bug 951321?

Not the same root cause :/

Comment 5

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

Seems like the swipe gesture is in state 8. Like if we are still pinching.

Comment 6

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

Attachment: bug951290

Comment 7

[Vivien Nicolas (:vingtetun) (:21) - (NOT reading bugmails, needinfo? please)]

https://hg.mozilla.org/integration/b2g-inbound/rev/36ab8519a74c

Comment 8

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/mozilla-central/rev/36ab8519a74c

Comment 9

[Ryan VanderMeulen [:RyanVM]]

https://hg.mozilla.org/releases/mozilla-aurora/rev/c88f01b65f6a