961636 - Enable APZ in Firefox OS makes resize dispatched twice when 1. app starts up and 2. user rotates the device at first time

Status: RESOLVED DUPLICATE of bug 997101

(Core :: Panning and Zooming, defect)

Description

[John Hu [:johnhu][:johu][:醬糊小弟]]

Attachment: with-apz.txt

While debugging bug 831890, I found the resize event of window object will be dispatched twice at the first rotation. But after the first rotation, it is only dispatched once per rotation.

Device: Inari
Version: Master, PVT: 20140119040203

Comment 1

[John Hu [:johnhu][:johu][:醬糊小弟]]

Attachment: log without apz

Comment 2

[John Hu [:johnhu][:johu][:醬糊小弟]]

Attachment: testing app based on template app

In this testing app, it shows "please rotate your device to see result." at the screen. When user rotates the device once, it increases the resizeCount and shows "resizeCount: $1".

Comment 3

[John Hu [:johnhu][:johu][:醬糊小弟]]

Attachment: rotate with the testing app

Wihtout APZ enabled, it works correctly. After APZ enabled, we may observe:
1. the resize is called twice while app started
2. the resize is called twice when the first rotation
3. the resize is called once when the 2+ rotations.

Comment 4

[Kartikaya Gupta (email:[e-mail])]

Adding standalone testcase extracted from test app

Comment 5

[Kartikaya Gupta (email:[e-mail])]

On the latest master code, when I run the app or use the standalone test case, I see the resize called twice on app startup, but then only once all rotations. So part of this bug has already been fixed.

Comment 6

[Kartikaya Gupta (email:[e-mail])]

And the patch on bug 997101 makes the initial load only have one resize.