1168429 - Jitter when zooming while location bar is showing/hiding

Status: RESOLVED DUPLICATE of bug 1165587

(Firefox for iOS :: General, defect)

Description

[Stefan Arentz | :st3fan | ⏰ EST | he/him]

STR:

1) Open a page that can be zoomed
2) Slowly zoom in/out with a two finger gesture

You will see the location bar hide/show but it will 'jitter' (for lack of better word) a lot. It looks like it is quickly alternating between two offsets.

(Is it possible that we look at some tap offset in a gesture recognizer and that the taps are being randomized by iOS? Like first the touch at index 0 is the first finger and then at the next invocation it is the other finger?)

Comment 1

[Wesley Johnston (:wesj)]

I think we could probably live with this (IMO), but tracking for now.

Comment 2

[Stephan Leroux [:sleroux]]

Attachment: PR https://github.com/mozilla/firefox-ios/pull/533

Added a small patch for this where we disable toolbar scrolling while the user is zooming so the toolbars don't get all janky.

Comment 3

[Stephan Leroux [:sleroux]]

Closing this patch and bug and marking it as a duplicate of https://bugzilla.mozilla.org/show_bug.cgi?id=1165587 as this issue is a sub issue of that issue.