Bug 129691 - REGRESSION: Overlay scrollbars that have grown are sometimes askew in the track
Summary: REGRESSION: Overlay scrollbars that have grown are sometimes askew in the track
Status: RESOLVED FIXED
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2014-03-04 11:50 PST by Beth Dakin
Modified: 2014-03-04 12:16 PST (History)
9 users (show)

See Also:

Attachments
Patch (3.81 KB, patch)
2014-03-04 12:00 PST, Beth Dakin 		simon.fraser: review+
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Description Beth Dakin 2014-03-04 11:50:46 PST 
Overlay scrollbars that have grown are sometimes askew in the track. This started happening after we adopted the setPresentationValue ScrollbarPainter API which allowed us to update the position of the scrollbar knob from our secondary scrolling thread. This bug occurs when the scrollbar grows while it still thinks it is in presentation-value mode. Whenever the scrollbar grows, it should be in non-presentation value mode.

<rdar://problem/15666846>
Comment 1 Beth Dakin 2014-03-04 12:00:12 PST 
Created attachment 225801 [details]
Patch
Comment 2 Beth Dakin 2014-03-04 12:16:46 PST 
Thanks, Simon! http://trac.webkit.org/changeset/165069