<https://webkit.org/b/119622> [CSSRegions] Not possible to clear the selection...
<https://webkit.org/b/119622> [CSSRegions] Not possible to clear the selection when mixing content from different FlowThreads Patch by Javier Fernandez <email@example.com> on 2013-09-04 Reviewed by David Hyatt. Source/WebCore: When using CSS Regions is usual that the RenderTree doesn't match the DOM Tree in terms of relative position of the nodes. Besides, usually the content of a certain node is split and spread across multiple blocks, rendered in different positions. Regarding the Selection, this problem is even more important; the selection direction changes when crossing the FlowThread boundaries. This weird behavior is also present in other layouts using non-regular positioning mechanisms, like absolute, static. However, for those layouts the RenderTree preserves the order of the nodes, unlike the CSS Regions layout model. Because of how the RenderTree is generated with CSS Regions, the RenderView::setSelection algorithm is not able to repaint some of the rectangles defined during the selection process. In order to face this issue, the proposed fix determines whether it should backwards traversing the RenderTree, from the "stop" node to the RenderView node. Test: fast/regions/selecting-text-through-different-region-flows-2.html * rendering/RenderView.cpp: (WebCore::getNextOrPrevRenderObjectBasedOnDirection): Added. (WebCore::RenderView::setSelection): LayoutTests: * fast/regions/selecting-text-through-different-region-flows-2-expected.html: Added. * fast/regions/selecting-text-through-different-region-flows-2.html: Added. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@155058 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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