WebCore:

WebCore:

2009-03-03  David Hyatt  <hyatt@apple.com>

        https://bugs.webkit.org/show_bug.cgi?id=24201, pathologically bad block layout.

        Make sure to factor clear deltas into y position estimates.  Also avoid doing the comparison of
        the final position against the y position estimate until after the clear has happened.  This gets rid
        of some duplicated cut/pasted code and also ensures a layout delta only has to be put in once.

        Reviewed by Dan Bernstein

        Added fast/block/float/nested-clearance.html

        * rendering/RenderBlock.cpp:
        (WebCore::RenderBlock::collapseMargins):
        (WebCore::RenderBlock::clearFloatsIfNeeded):
        (WebCore::RenderBlock::estimateVerticalPosition):
        (WebCore::RenderBlock::layoutBlockChildren):
        (WebCore::RenderBlock::getClearDelta):
        * rendering/RenderBlock.h:

LayoutTests:

2009-03-03  David Hyatt  <hyatt@apple.com>

        Test case for https://bugs.webkit.org/show_bug.cgi?id=24201

        Reviewed by Dan Bernstein

        * fast/block/float/nested-clearance.html: Added.
        * platform/mac/fast/block/float/nested-clearance-expected.checksum: Added.
        * platform/mac/fast/block/float/nested-clearance-expected.png: Added.
        * platform/mac/fast/block/float/nested-clearance-expected.txt: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@41422 268f45cc-cd09-0410-ab3c-d52691b4dbfc