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yael.aharon@nokia.com authored
https://bugs.webkit.org/show_bug.cgi?id=83720 Reviewed by Noam Rosenthal. .: * ManualTests/nested-fixed-position.html: Added. Source/WebCore: Before setting the scrollPositionDelta to a fixed layer, check if it has an ancestor which also has fixed position. If it does, do not set scrollPositionDelta. Added a flag to TextureMapperLayer and GraphicsLayerTextureMapper indicating if it is a fixed position layer. * platform/graphics/texmap/GraphicsLayerTextureMapper.cpp: (WebCore::GraphicsLayerTextureMapper::GraphicsLayerTextureMapper): * platform/graphics/texmap/GraphicsLayerTextureMapper.h: (WebCore::GraphicsLayerTextureMapper::setFixedToViewport): (WebCore::GraphicsLayerTextureMapper::fixedToViewport): (GraphicsLayerTextureMapper): * platform/graphics/texmap/TextureMapperLayer.cpp: (WebCore::TextureMapperLayer::syncCompositingStateSelf): (WebCore::TextureMapperLayer::isAncestorFixedToViewport): (WebCore): (WebCore::TextureMapperLayer::setScrollPositionDeltaIfNeeded): * platform/graphics/texmap/TextureMapperLayer.h: (TextureMapperLayer): (WebCore::TextureMapperLayer::setFixedToViewport): Source/WebKit2: Set the fixedToViewport flag on the fixed position layers and adjust to the new function name for setting scrollPositionDelta. * UIProcess/WebLayerTreeRenderer.cpp: (WebKit::WebLayerTreeRenderer::adjustPositionForFixedLayers): (WebKit::WebLayerTreeRenderer::setLayerState): git-svn-id: http://svn.webkit.org/repository/webkit/trunk@113983 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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