https://bugs.webkit.org/show_bug.cgi?id=118665

Source/WebCore:

In order to properly propagate the visual overflow of elements flowed inside regions,
the responsiblity of painting and hit-testing content inside flow threads has been
moved to the flow thread layer's level.
Each region keeps the associated overflow with each box in the RenderBoxRegionInfo
structure, including one for the flow thread itself. This data is used during
painting and hit-testing.

Reviewed by David Hyatt.

Tests: fast/regions/overflow-first-and-last-regions-in-container-hidden.html
       fast/regions/overflow-first-and-last-regions.html
       fast/regions/overflow-nested-regions.html
       fast/regions/overflow-region-float.html
       fast/regions/overflow-region-inline.html
       fast/regions/overflow-region-transform.html

* rendering/InlineFlowBox.cpp:
(WebCore::InlineFlowBox::setLayoutOverflow):
(WebCore::InlineFlowBox::setVisualOverflow):
* rendering/InlineFlowBox.h:
* rendering/RenderBlock.cpp:
(WebCore::RenderBlock::addOverflowFromChildren):
(WebCore::RenderBlock::paint):
(WebCore::RenderBlock::paintObject):
(WebCore::RenderBlock::estimateRegionRangeForBoxChild):
(WebCore::RenderBlock::updateRegionRangeForBoxChild):
* rendering/RenderBlockFlow.cpp:
(WebCore::RenderBlockFlow::hasNextPage):
(WebCore::RenderBlockFlow::relayoutForPagination):
* rendering/RenderBlockLineLayout.cpp:
(WebCore::RenderBlockFlow::positionNewFloatOnLine):
* rendering/RenderBox.cpp:
(WebCore::RenderBox::borderBoxRectInRegion):
(WebCore::RenderBox::computeRectForRepaint):
(WebCore::RenderBox::addLayoutOverflow):
(WebCore::RenderBox::addVisualOverflow):
(WebCore::RenderBox::isUnsplittableForPagination):
(WebCore::RenderBox::overflowRectForPaintRejection):
* rendering/RenderBox.h:
(WebCore::RenderBox::canHaveOutsideRegionRange):
* rendering/RenderBoxModelObject.cpp:
(WebCore::RenderBoxModelObject::paintMaskForTextFillBox):
(WebCore::RenderBoxModelObject::paintFillLayerExtended):
* rendering/RenderBoxModelObject.h:
* rendering/RenderBoxRegionInfo.h:
(WebCore::RenderBoxRegionInfo::createOverflow):
* rendering/RenderFlowThread.cpp:
(WebCore::RenderFlowThread::objectShouldPaintInFlowRegion):
(WebCore::RenderFlowThread::mapFromLocalToFlowThread):
(WebCore::RenderFlowThread::mapFromFlowThreadToLocal):
(WebCore::RenderFlowThread::decorationsClipRectForBoxInRegion):
(WebCore::RenderFlowThread::flipForWritingModeLocalCoordinates):
(WebCore::RenderFlowThread::addRegionsOverflowFromChild):
(WebCore::RenderFlowThread::addRegionsVisualOverflow):
(WebCore::CurrentRenderFlowThreadMaintainer::CurrentRenderFlowThreadMaintainer):
* rendering/RenderFlowThread.h:
* rendering/RenderLayer.cpp:
(WebCore::RenderLayer::updateLayerPositions):
(WebCore::expandClipRectForRegionAndReflection):
(WebCore::expandClipRectForDescendantsAndReflection):
(WebCore::RenderLayer::paintLayer):
(WebCore::RenderLayer::paintLayerContents):
(WebCore::RenderLayer::updatePaintingInfoForFragments):
(WebCore::RenderLayer::paintForegroundForFragments):
(WebCore::RenderLayer::hitTest):
(WebCore::RenderLayer::hitTestLayer):
(WebCore::RenderLayer::mapLayerClipRectsToFragmentationLayer):
(WebCore::RenderLayer::calculateClipRects):
(WebCore::RenderLayer::parentClipRects):
(WebCore::RenderLayer::calculateRects):
(WebCore::RenderLayer::intersectsDamageRect):
(WebCore::RenderLayer::updateDescendantsLayerListsIfNeeded):
(WebCore::RenderLayer::repaintIncludingDescendants):
(WebCore::RenderLayer::paintNamedFlowThreadInsideRegion):
(WebCore::RenderLayer::paintFlowThreadIfRegion):
(WebCore::RenderLayer::hitTestFlowThreadIfRegion):
* rendering/RenderLayer.h:
(WebCore::ClipRect::inflateX):
(WebCore::ClipRect::inflateY):
(WebCore::ClipRect::inflate):
* rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::computeCompositingRequirements):
* rendering/RenderListItem.cpp:
(WebCore::RenderListItem::addOverflowFromChildren):
* rendering/RenderMultiColumnSet.cpp:
(WebCore::RenderMultiColumnSet::flowThreadPortionOverflowRect):
(WebCore::RenderMultiColumnSet::repaintFlowThreadContent):
* rendering/RenderMultiColumnSet.h:
* rendering/RenderNamedFlowFragment.cpp:
(WebCore::RenderNamedFlowFragment::createStyle):
(WebCore::RenderNamedFlowFragment::namedFlowThread):
* rendering/RenderNamedFlowFragment.h:
* rendering/RenderOverflow.h:
* rendering/RenderRegion.cpp:
(WebCore::RenderRegion::flowThreadPortionOverflowRect):
(WebCore::RenderRegion::flowThreadPortionLocation):
(WebCore::RenderRegion::regionContainerLayer):
(WebCore::RenderRegion::overflowRectForFlowThreadPortion):
(WebCore::RenderRegion::computeOverflowFromFlowThread):
(WebCore::RenderRegion::repaintFlowThreadContent):
(WebCore::RenderRegion::repaintFlowThreadContentRectangle):
(WebCore::RenderRegion::insertedIntoTree):
(WebCore::RenderRegion::ensureOverflowForBox):
(WebCore::RenderRegion::rectFlowPortionForBox):
(WebCore::RenderRegion::addLayoutOverflowForBox):
(WebCore::RenderRegion::addVisualOverflowForBox):
(WebCore::RenderRegion::layoutOverflowRectForBox):
(WebCore::RenderRegion::visualOverflowRectForBox):
(WebCore::RenderRegion::visualOverflowRectForBoxForPropagation):
* rendering/RenderRegion.h:
* rendering/RenderReplaced.cpp:
(WebCore::RenderReplaced::shouldPaint):
* rendering/RootInlineBox.cpp:
(WebCore::RootInlineBox::paint):

LayoutTests:

Rebased some tests due to regions layers changes.
Updated some tests to increase clarity. Some of them were only passing because two
regions were close together and the fact that an element was being painted
inside the wrong region was not visible. Floats are now also unsplittable.
        - bottom-overflow-out-of-first-region
        - float-pushed-width-change-2
        - float-pushed-width-change
        - webkit-flow-float-unable-to-push

Changed top-overflow-out-of-second-region to reftest.

Added new tests for testing the visual overflow in different situations
(transformed, inline, opacity, floating).

Reviewed by David Hyatt.

* fast/regions/bottom-overflow-out-of-first-region-expected.html:
* fast/regions/bottom-overflow-out-of-first-region.html:
* fast/regions/counters/extract-ordered-lists-in-regions-explicit-counters-005-expected.html:
* fast/regions/counters/extract-ordered-lists-in-regions-explicit-counters-005.html:
* fast/regions/element-in-named-flow-absolute-from-fixed-expected.txt:
* fast/regions/element-in-named-flow-fixed-from-absolute-expected.txt:
* fast/regions/element-inflow-fixed-from-outflow-static-expected.txt:
* fast/regions/element-outflow-static-from-inflow-fixed-expected.txt:
* fast/regions/float-pushed-width-change-2-expected.html:
* fast/regions/float-pushed-width-change-2.html:
* fast/regions/float-pushed-width-change-expected.html:
* fast/regions/float-pushed-width-change.html:
* fast/regions/layers/dynamic-layer-added-with-no-layout-expected.txt: Added.
* fast/regions/layers/dynamic-layer-removed-with-no-layout-expected.txt: Added.
* fast/regions/layers/regions-promoted-to-layers-expected.txt: Added.
* fast/regions/layers/regions-promoted-to-layers-horizontal-bt-expected.txt: Added.
* fast/regions/layers/regions-promoted-to-layers-vertical-lr-expected.txt: Added.
* fast/regions/layers/regions-promoted-to-layers-vertical-rl-expected.txt: Added.
* fast/regions/outline-sides-in-region-expected.html:
* fast/regions/outline-sides-in-region.html:
* fast/regions/overflow-first-and-last-regions-expected.html: Added.
* fast/regions/overflow-first-and-last-regions-in-container-hidden-expected.html: Added.
* fast/regions/overflow-first-and-last-regions-in-container-hidden.html: Added.
* fast/regions/overflow-first-and-last-regions.html: Added.
* fast/regions/overflow-last-region-expected.html: Removed.
* fast/regions/overflow-last-region.html: Removed.
* fast/regions/overflow-nested-regions-expected.html: Added.
* fast/regions/overflow-nested-regions.html: Added.
* fast/regions/overflow-region-float-expected.html: Added.
* fast/regions/overflow-region-float.html: Added.
* fast/regions/overflow-region-inline-expected.html: Added.
* fast/regions/overflow-region-inline.html: Added.
* fast/regions/overflow-region-transform-expected.html: Added.
* fast/regions/overflow-region-transform.html: Added.
* fast/regions/overflow-scrollable-rotated-fragment-expected.html:
* fast/regions/overflow-scrollable-rotated-fragment.html:
* fast/regions/top-overflow-out-of-second-region-expected.html: Copied from LayoutTests/fast/regions/top-overflow-out-of-second-region.html.
* fast/regions/top-overflow-out-of-second-region.html:
* fast/regions/webkit-flow-float-unable-to-push-expected.html:
* fast/regions/webkit-flow-float-unable-to-push.html:
* platform/gtk/fast/regions/text-region-split-vertical-rl-expected.txt: Removed.
* platform/mac-wk2/TestExpectations:
* platform/mac/fast/regions/top-overflow-out-of-second-region-expected.png: Removed.
* platform/mac/fast/regions/top-overflow-out-of-second-region-expected.txt: Removed.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159337 268f45cc-cd09-0410-ab3c-d52691b4dbfc