978323 - [B2G][Browser] Double tap to zoom is not functioning correctly

Status: RESOLVED INVALID

(Core :: Panning and Zooming, defect)

Description

[Rachel Pribble [:rpribble]]

Description:
Double tapping the screen to zoom in to a specific area is not functioning while in a browser page (www.google.com used for test).

Repro Steps:
1) Updated buri to BuildID: 20140227040202
2) Tap Firefox browser icon
3) Navigate to www.google.com
4) Double tap screen to zoom in
5) Observe lack of response to double tap

Actual:
Double tap non functioning.

Expected:
User gestures function as intended.

Environmental Variables:
Device: Buri 1.4 MOZ ril
BuildID: 20140228040203
Gaia: 9422aca1931ba6c68784f9e80bb1b6a7fcfd92e3
Gecko: 58eca03214a6
Version: 30.0a1
Firmware Version: V1.2-device.cfg

Notes:

Repro frequency: 100%

Comment 1

[Jason Smith [:jsmith]]

Can we check what happens on 1.3?

Comment 2

[Rachel Pribble [:rpribble]]

Oops I'm sorry! That was my mistake. Marked v1.2 instead of v1.3.  Went ahead and checked and corrected both v1.2 and v1.3 flags.

Comment 3

[Jason Smith [:jsmith]]

(In reply to rpribble from comment #2)
> Oops I'm sorry! That was my mistake. Marked v1.2 instead of v1.3.  Went
> ahead and checked and corrected both v1.2 and v1.3 flags.

? I would expect this to be working on 1.2. Can you double check this?

Comment 4

[Rachel Pribble [:rpribble]]

Sure thing, rechecked and definitely not functioning correctly on the latest v1.2. Tested on data connection on google.com and yahoo.com search results pages for verification. Double tapping has no effect on v1.2.

Environmental Variables:
Device: buri v1.2 moz ril
BuildID: 20140220004002
Gaia: 539a25e1887b902b8b25038c547048e691bd97f6
Gecko: 2ea6a65eea23
Version: 26.0
Firmware Version: v1.2-device.cfg

Comment 5

[Jason Smith [:jsmith]]

Botond - Is the behavior on 1.3 or 1.4 correct here? We appear to be getting different results here across old releases.

Comment 6

[Botond Ballo [:botond]]

It looks like the change in behaviour from 1.3 to 1.4 is brought about by bug 941995. The concensus there is that the new (1.4) behaviour is desirable.

Comment 7

[Botond Ballo [:botond]]

To expand on that a bit: google.com has "width=device-width" in its meta "viewport" tag. My understanding based on https://bugzilla.mozilla.org/show_bug.cgi?id=941995#c1 is that this indicates the page is "mobile optimized" and that therefore the double-tap-to-zoom gesture can be disabled to make single taps more responsive (since, if double-tap-to-zoom is enabled, we need to wait a bit after a tap to make sure a second tap isn't coming before we can deem it a single tap).

Comment 8

[Jason Smith [:jsmith]]

Okay - marking as invalid then, as we're now doing the right behavior.