[Webkit-unassigned] [Bug 32534] Confusing, possibly buggy code in RenderLayer::updateScrollInfoAfterLayout()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=32534





--- Comment #4 from mitz at webkit.org  2009-12-14 17:36:34 PST ---
This code ensures that when a right-to-left scrollable area’s width (or content
width) changes, the top right corner of the content doesn’t shift with respect
to the top right corner of the area. Conceptually, right-to-left areas have
their origin at the top-right, but RenderLayer is top-left oriented, so this is
needed to keep everything working (see how scrollXOffset() differs from
srollYOffsset() to get an idea of why the horizontal and vertical scrollbars
need to be treated differently).

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