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