Bug 149895

Summary:

Kinetic scrolling breaks on Mac when using 100% height, box-sizing: border-box with top and bottom borders

Product:

WebKit

Reporter:

Jonathan Wells <jonowells>

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

aestes, andersca, bfulgham, simon.fraser, thorton, wenson_hsieh

Priority:

Version:

WebKit Nightly Build

Hardware:

Mac

OS:

OS X 10.11

Attachments:

Description	Flags
Scrolling: Reduced test case.	none

Jonathan Wells

Reported 2015-10-07 13:55:57 PDT

Created attachment 262637 [details] Scrolling: Reduced test case. In Mac OS X (possibly also iOS) scrolling an item with 100% height, box-sizing set to border-box and pixel values for top and bottom borders, the kinetic scrolling will not reach the bottom if the trackpad is, say, flicked hard with two fingers from the top and left to scroll under its own momentum. The scrolling will stop shy of the bottom by the same as the border height. To reach the bottom the fingers need to still be touching the trackpad. It seems like a more linear scrolling animation kicks in by mistake. Reduced test case attached.

Attachments
Scrolling: Reduced test case. (3.54 KB, text/html) 2015-10-07 13:55 PDT, Jonathan Wells	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Simon Fraser (smfr)

Comment 1 2015-10-07 14:30:49 PDT

I can reproduce.

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