[Webkit-unassigned] [Bug 15391] SVGRenderContainer forces too many kids to relayout

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=15391





------- Comment #2 from eric at webkit.org  2007-10-10 14:34 PDT -------
Because all renderers cache their absolute bounds, any time your bounds origin,
or transform (or a parent's bounds origin or transform) changes *all* kids need
to relayout.

However, any time just bounds size changes (or parents bounds size changes)
only relative-sized kids need to relayout.  (The parent who's bounds size
changed will invalidate the proper region for repaint.)

After fixing our localTransform handling to make the renders pull (soon to
land), we now know when the local transform has changed, but that information
isn't actually very useful unless we stash it away in the LayoutState so that
our container kids can use it to decide what type of layout to do.


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