1040094 - Overscroll freezes when used on a scrollgrab element with a non-scrollable child

Status: RESOLVED DUPLICATE of bug 1040226

(Core :: Panning and Zooming, defect)

Description

[Ben Francis [:benfrancis]]

Video of issue: https://www.youtube.com/watch?v=Dzx7incs3Lw

STR:
* Create an outer scrollable div with an inner iframe navigated to a page that doesn't scroll (note scrollgrab is only enabled for certified apps)

<div id="wrapper>
  <iframe src="http://chrislord.net/files/mozilla/clipping.html">
</div>

wrapper.scrollgrab = true;

#wrapper {
  overflow: scroll;
}

* Scroll inner frame


Alternative STR:
* Apply Gaia patch from bug 1039519 (or checkout Gaia feature branch at https://github.com/benfrancis/gaia/tree/1039519).
* Build Gaia with HAIDA=1 (warning: the UI in this build is going to look pretty broken, but will allow you to reproduce this bug).
* Tap the Rocketbar
* Type http://chrislord.net/files/mozilla/clipping.html
* Wait for page to load
* Overscroll the iframe
* Lift finger

Expected:
* Pretty overscroll

Actual:
* iframe freezes mid-scroll

Comment 1

[Botond Ballo [:botond]]

This is possibly the same issue as bug 1040226 (in which case it's not specific to scrollgrab, but affects all instances of overscrolling after scroll handoff).

Comment 2

[Chris Lord [:cwiiis]]

The patch on bug 1040226 fixes this.