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commit-queue@webkit.org authored
https://bugs.webkit.org/show_bug.cgi?id=111670 Patch by Tien-Ren Chen <trchen@chromium.org> on 2013-03-28 Reviewed by James Robinson. Source/Platform: Added WebLayerPositionConstraint for layers that need position adjustment during threaded scrolling. Currently it is only used for fixed-position layers. * Platform.gypi: * chromium/public/WebLayer.h: (WebKit): (WebLayer): (WebKit::WebLayer::setPositionConstraint): (WebKit::WebLayer::positionConstraint): (WebKit::WebLayer::setFixedToContainerLayer): (WebKit::WebLayer::fixedToContainerLayer): * chromium/public/WebLayerPositionConstraint.h: Added. (WebKit): (WebLayerPositionConstraint): (WebKit::WebLayerPositionConstraint::WebLayerPositionConstraint): (WebKit::WebLayerPositionConstraint::fixedPosition): Source/WebCore: This patch adds support to bottom-right fixed-position elements by introducing WebLayerPositionConstraint to WebLayer. No new tests. Can't test until chromium patch landed. * page/scrolling/ScrollingCoordinator.h: (WebCore::ScrollingCoordinator::updateLayerPositionConstraint): * page/scrolling/chromium/ScrollingCoordinatorChromium.cpp: (WebCore::clearPositionConstraintExceptForLayer): (WebCore): (WebCore::computePositionConstraint): (WebCore::ScrollingCoordinatorChromium::updateLayerPositionConstraint): * page/scrolling/chromium/ScrollingCoordinatorChromium.h: (ScrollingCoordinatorChromium): * rendering/RenderLayerBacking.cpp: (WebCore::RenderLayerBacking::registerScrollingLayers): * rendering/RenderLayerBacking.h: (WebCore::RenderLayerBacking::contentsContainmentLayer): (RenderLayerBacking): * rendering/RenderLayerCompositor.cpp: * rendering/RenderLayerCompositor.h: git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147163 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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