Bug 132168

Summary:	[New Multicolumn][Regions] offsetLeft/Top don't work right when the top left corner is at a column/region boundary.
Product:	WebKit	Reporter:	Dave Hyatt <hyatt>
Component:	Layout and Rendering	Assignee:	Dave Hyatt <hyatt>
Status:	NEW ---
Severity:	Normal
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	Unspecified
OS:	Unspecified

Description Dave Hyatt 2014-04-24 21:24:59 PDT

This is an interesting complication with offsetLeft/Top for columns and regions. This is an issue with the old columns as well as the new ones, so it's not a regression. Basically when testing the top left location of a box, in flipped block writing modes, this can result in you picking the wrong column. We need the ability to make different choices at boundaries if looking at the opposite edge of a box.

I imagine this bug occurs with regions as well, and that it's not unique to columns.