NEW 138913
FrameSelection::selectionBounds rarely matches the painted selection highlight rect 
https://bugs.webkit.org/show_bug.cgi?id=138913
Summary FrameSelection::selectionBounds rarely matches the painted selection highligh...
Tim Horton
Reported 2014-11-20 00:11:05 PST
There are a number of places between selection painting and the rect returned by FrameSelection::selectionBounds where rounding is applied inconsistently, resulting in a rect that doesn't precisely match the painted pixels. For example, RenderView::subtreeSelectionBounds does a 'enclosingBoundingBox', and InlineTextBox::localSelectionRect does a 'enclosingIntRect' instead of 'snapRectToDevicePixelsWithWritingDirection' (which is what happens in the painting code). This means that FrameSnapshotting::snapshotSelection often returns a snapshot that doesn't precisely match the blue highlight. This also breaks TextIndicator's BounceAndCrossfade animation, which depends on that being true.
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Radar WebKit Bug Importer
Comment 1 2014-11-20 00:37:50 PST
<rdar://problem/19041871>
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