190 lines
8.4 KiB
C++
190 lines
8.4 KiB
C++
/*
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* Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#pragma once
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#include "LayerFragment.h"
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#include "RenderBlockFlow.h"
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#include "VisiblePosition.h"
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#include <memory>
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namespace WebCore {
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class Element;
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class RenderBox;
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class RenderBoxFragmentInfo;
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class RenderFragmentedFlow;
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class RenderFragmentContainer : public RenderBlockFlow {
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WTF_MAKE_ISO_ALLOCATED(RenderFragmentContainer);
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public:
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void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
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void setFragmentedFlowPortionRect(const LayoutRect& rect) { m_fragmentedFlowPortionRect = rect; }
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LayoutRect fragmentedFlowPortionRect() const { return m_fragmentedFlowPortionRect; }
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LayoutRect fragmentedFlowPortionOverflowRect();
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LayoutPoint fragmentedFlowPortionLocation() const;
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virtual void attachFragment();
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virtual void detachFragment();
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RenderFragmentedFlow* fragmentedFlow() const { return m_fragmentedFlow; }
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// Valid fragments do not create circular dependencies with other flows.
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bool isValid() const { return m_isValid; }
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void setIsValid(bool valid) { m_isValid = valid; }
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RenderBoxFragmentInfo* renderBoxFragmentInfo(const RenderBox*) const;
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RenderBoxFragmentInfo* setRenderBoxFragmentInfo(const RenderBox*, LayoutUnit logicalLeftInset, LayoutUnit logicalRightInset,
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bool containingBlockChainIsInset);
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std::unique_ptr<RenderBoxFragmentInfo> takeRenderBoxFragmentInfo(const RenderBox*);
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void removeRenderBoxFragmentInfo(const RenderBox&);
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void deleteAllRenderBoxFragmentInfo();
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bool isFirstFragment() const;
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bool isLastFragment() const;
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virtual bool shouldClipFragmentedFlowContent() const;
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// These methods represent the width and height of a "page" and for a RenderFragmentContainer they are just the
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// content width and content height of a fragment. For RenderFragmentContainerSets, however, they will be the width and
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// height of a single column or page in the set.
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virtual LayoutUnit pageLogicalWidth() const;
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virtual LayoutUnit pageLogicalHeight() const;
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LayoutUnit logicalTopOfFragmentedFlowContentRect(const LayoutRect&) const;
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LayoutUnit logicalBottomOfFragmentedFlowContentRect(const LayoutRect&) const;
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LayoutUnit logicalTopForFragmentedFlowContent() const { return logicalTopOfFragmentedFlowContentRect(fragmentedFlowPortionRect()); };
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LayoutUnit logicalBottomForFragmentedFlowContent() const { return logicalBottomOfFragmentedFlowContentRect(fragmentedFlowPortionRect()); };
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// This method represents the logical height of the entire flow thread portion used by the fragment or set.
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// For RenderFragmentContainers it matches logicalPaginationHeight(), but for sets it is the height of all the pages
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// or columns added together.
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virtual LayoutUnit logicalHeightOfAllFragmentedFlowContent() const;
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// The top of the nearest page inside the fragment. For RenderFragmentContainers, this is just the logical top of the
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// flow thread portion we contain. For sets, we have to figure out the top of the nearest column or
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// page.
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virtual LayoutUnit pageLogicalTopForOffset(LayoutUnit offset) const;
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// Whether or not this fragment is a set.
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virtual bool isRenderFragmentContainerSet() const { return false; }
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virtual void repaintFragmentedFlowContent(const LayoutRect& repaintRect);
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virtual void collectLayerFragments(LayerFragments&, const LayoutRect&, const LayoutRect&) { }
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virtual void adjustFragmentBoundsFromFragmentedFlowPortionRect(LayoutRect& fragmentBounds) const;
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void addLayoutOverflowForBox(const RenderBox*, const LayoutRect&);
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void addVisualOverflowForBox(const RenderBox*, const LayoutRect&);
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LayoutRect layoutOverflowRectForBox(const RenderBox*);
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LayoutRect visualOverflowRectForBox(const RenderBoxModelObject&);
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LayoutRect layoutOverflowRectForBoxForPropagation(const RenderBox*);
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LayoutRect visualOverflowRectForBoxForPropagation(const RenderBoxModelObject&);
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LayoutRect rectFlowPortionForBox(const RenderBox*, const LayoutRect&) const;
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void setFragmentObjectsFragmentStyle();
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void restoreFragmentObjectsOriginalStyle();
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bool canHaveChildren() const override { return false; }
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bool canHaveGeneratedChildren() const override { return true; }
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VisiblePosition positionForPoint(const LayoutPoint&, const RenderFragmentContainer*) override;
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virtual Vector<LayoutRect> fragmentRectsForFlowContentRect(const LayoutRect&);
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protected:
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RenderFragmentContainer(Element&, RenderStyle&&, RenderFragmentedFlow*);
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RenderFragmentContainer(Document&, RenderStyle&&, RenderFragmentedFlow*);
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void ensureOverflowForBox(const RenderBox*, RefPtr<RenderOverflow>&, bool);
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void computePreferredLogicalWidths() override;
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void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
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enum OverflowType {
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LayoutOverflow = 0,
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VisualOverflow
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};
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LayoutRect overflowRectForFragmentedFlowPortion(const LayoutRect& fragmentedFlowPortionRect, bool isFirstPortion, bool isLastPortion, OverflowType);
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void repaintFragmentedFlowContentRectangle(const LayoutRect& repaintRect, const LayoutRect& fragmentedFlowPortionRect, const LayoutPoint& fragmentLocation, const LayoutRect* fragmentedFlowPortionClipRect = 0);
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LayoutRect fragmentedFlowContentRectangle(const LayoutRect&, const LayoutRect& fragmentedFlowPortionRect, const LayoutPoint& fragmentLocation, const LayoutRect* fragmentedFlowPortionClipRect = 0);
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void computeOverflowFromFragmentedFlow();
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private:
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bool isRenderFragmentContainer() const final { return true; }
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const char* renderName() const override { return "RenderFragmentContainer"; }
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void insertedIntoTree(IsInternalMove) override;
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void willBeRemovedFromTree(IsInternalMove) override;
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virtual void installFragmentedFlow();
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LayoutPoint mapFragmentPointIntoFragmentedFlowCoordinates(const LayoutPoint&);
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protected:
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RenderFragmentedFlow* m_fragmentedFlow;
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private:
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LayoutRect m_fragmentedFlowPortionRect;
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// This map holds unique information about a block that is split across fragments.
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// A RenderBoxFragmentInfo* tells us about any layout information for a RenderBox that
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// is unique to the fragment. For now it just holds logical width information for RenderBlocks, but eventually
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// it will also hold a custom style for any box (for fragment styling).
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typedef HashMap<const RenderBox*, std::unique_ptr<RenderBoxFragmentInfo>> RenderBoxFragmentInfoMap;
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RenderBoxFragmentInfoMap m_renderBoxFragmentInfo;
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bool m_isValid { false };
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};
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class CurrentRenderFragmentContainerMaintainer {
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WTF_MAKE_NONCOPYABLE(CurrentRenderFragmentContainerMaintainer);
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public:
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CurrentRenderFragmentContainerMaintainer(RenderFragmentContainer&);
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~CurrentRenderFragmentContainerMaintainer();
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RenderFragmentContainer& fragment() const { return m_fragment; }
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private:
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RenderFragmentContainer& m_fragment;
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};
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#ifndef NDEBUG
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TextStream& operator<<(TextStream&, const RenderFragmentContainer&);
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#endif
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} // namespace WebCore
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SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderFragmentContainer, isRenderFragmentContainer())
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