third_party/WebKit/Source/core/layout/LayoutInline.h - chromium/src - Git at Google

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */

 #ifndef LayoutInline_h
 #define LayoutInline_h

 #include "core/CoreExport.h"
 #include "core/editing/PositionWithAffinity.h"
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/layout/api/LineLayoutItem.h"
 #include "core/layout/line/InlineFlowBox.h"
 #include "core/layout/line/LineBoxList.h"

 namespace blink {

 // LayoutInline is the LayoutObject associated with display: inline.
 // This is called an "inline box" in CSS 2.1.
 // http://www.w3.org/TR/CSS2/visuren.html#inline-boxes
 //
 // It is also the base class for content that behaves in similar way (like
 // quotes and "display: ruby").
 //
 // Note that LayoutInline is always 'inline-level' but other LayoutObject
 // can be 'inline-level', which is why it's stored as a boolean on LayoutObject
 // (see LayoutObject::isInline()).
 //
 // For performance and memory consumption, this class ignores some inline-boxes
 // during line layout because they don't impact layout (they still exist and are
 // inserted into the layout tree). An example of this is
 //             <span><span>Text</span></span>
 // where the 2 spans have the same size as the inner text-node so they can be
 // ignored for layout purpose, generating a single inline-box instead of 3.
 // One downside of this optimization is that we have extra work to do when
 // asking for bounding rects (see generateLineBoxRects).
 // This optimization is called "culled inline" in the code.
 //
 // LayoutInlines are expected to be laid out by their containing
 // LayoutBlockFlow. See LayoutBlockFlow::layoutInlineChildren.
 //
 //
 // ***** CONTINUATIONS AND ANONYMOUS LAYOUTBLOCKFLOWS *****
 // LayoutInline enforces the following invariant:
 // "All in-flow children of an inline box are inline."
 // When a non-inline child is inserted, LayoutInline::addChild splits the inline
 // and potentially enclosing inlines too. It then wraps layout objects into
 // anonymous block-flow containers. This creates complexity in the code as:
 // - a DOM node can have several associated LayoutObjects (we don't currently
 //   expose this information to the DOM code though).
 // - more importantly, nodes that are parent/child in the DOM have no natural
 //   relationship anymore (see example below).
 // In order to do a correct tree walk over this synthetic tree, a single linked
 // list is stored called *continuation*. See splitFlow() about how it is
 // populated during LayoutInline split.
 //
 // Continuations can only be a LayoutInline or an anonymous LayoutBlockFlow.
 // That's why continuations are handled by LayoutBoxModelObject (common class
 // between the 2). See LayoutBoxModelObject::continuation and setContinuation.
 //
 // Let's take the following example:
 //   <!DOCTYPE html>
 //   <b>Bold inline.<div>Bold block.</div>More bold inlines.</b>
 //
 // The generated layout tree is:
 //   LayoutBlockFlow {HTML}
 //    LayoutBlockFlow {BODY}
 //      LayoutBlockFlow (anonymous)
 //        LayoutInline {B}
 //          LayoutText {#text}
 //            text run: "Bold inline."
 //      LayoutBlockFlow (anonymous)
 //        LayoutBlockFlow {DIV}
 //          LayoutText {#text}
 //            text run: "Bold block."
 //      LayoutBlockFlow (anonymous)
 //        LayoutInline {B}
 //          LayoutText {#text}
 //            text run: "More bold inlines."
 //
 // The insertion of the <div> inside the <b> forces the latter to be split
 // into 2 LayoutInlines and the insertion of anonymous LayoutBlockFlows. The 2
 // LayoutInlines are done so that we can apply the correct (bold) style to both
 // sides of the <div>. The continuation chain starts with the first
 // LayoutInline {B}, continues to the middle anonymous LayoutBlockFlow and
 // finishes with the last LayoutInline {B}.
 //
 // Note that the middle anonymous LayoutBlockFlow duplicates the content.
 // TODO(jchaffraix): Find out why we made the decision to always insert the
 //                   anonymous LayoutBlockFlows.
 //
 // This section was inspired by an older article by Dave Hyatt:
 // https://www.webkit.org/blog/115/webcore-rendering-ii-blocks-and-inlines/
 class CORE_EXPORT LayoutInline : public LayoutBoxModelObject {
 public:
     explicit LayoutInline(Element*);

     static LayoutInline* createAnonymous(Document*);

     LayoutObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
     LayoutObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }

     // If you have a LayoutInline, use firstChild or lastChild instead.
     void slowFirstChild() const = delete;
     void slowLastChild() const = delete;

     void addChild(LayoutObject* newChild, LayoutObject* beforeChild = nullptr) override;

     Element* node() const { return toElement(LayoutBoxModelObject::node()); }

     LayoutRectOutsets marginBoxOutsets() const final;
     LayoutUnit marginLeft() const final;
     LayoutUnit marginRight() const final;
     LayoutUnit marginTop() const final;
     LayoutUnit marginBottom() const final;
     LayoutUnit marginBefore(const ComputedStyle* otherStyle = nullptr) const final;
     LayoutUnit marginAfter(const ComputedStyle* otherStyle = nullptr) const final;
     LayoutUnit marginStart(const ComputedStyle* otherStyle = nullptr) const final;
     LayoutUnit marginEnd(const ComputedStyle* otherStyle = nullptr) const final;
     LayoutUnit marginOver() const final;
     LayoutUnit marginUnder() const final;

     void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const final;
     void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const override;

     LayoutSize offsetFromContainer(const LayoutObject*, const LayoutPoint&, bool* offsetDependsOnPoint = nullptr) const final;

     IntRect linesBoundingBox() const;
     LayoutRect visualOverflowRect() const final;

     InlineFlowBox* createAndAppendInlineFlowBox();

     void dirtyLineBoxes(bool fullLayout);

     LineBoxList* lineBoxes() { return &m_lineBoxes; }
     const LineBoxList* lineBoxes() const { return &m_lineBoxes; }

     InlineFlowBox* firstLineBox() const { return m_lineBoxes.firstLineBox(); }
     InlineFlowBox* lastLineBox() const { return m_lineBoxes.lastLineBox(); }
     InlineBox* firstLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? firstLineBox() : culledInlineFirstLineBox(); }
     InlineBox* lastLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? lastLineBox() : culledInlineLastLineBox(); }

     LayoutBoxModelObject* virtualContinuation() const final { return continuation(); }
     LayoutInline* inlineElementContinuation() const;

     void updateDragState(bool dragOn) final;

     LayoutSize offsetForInFlowPositionedInline(const LayoutBox& child) const;

     void addOutlineRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, IncludeBlockVisualOverflowOrNot) const final;
     // The following methods are called from the container if it has already added outline rects for line boxes
     // and/or children of this LayoutInline.
     void addOutlineRectsForChildrenAndContinuations(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, IncludeBlockVisualOverflowOrNot) const;
     void addOutlineRectsForContinuations(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, IncludeBlockVisualOverflowOrNot) const;

     using LayoutBoxModelObject::continuation;
     using LayoutBoxModelObject::setContinuation;

     bool alwaysCreateLineBoxes() const { return alwaysCreateLineBoxesForLayoutInline(); }
     void setAlwaysCreateLineBoxes(bool alwaysCreateLineBoxes = true) { setAlwaysCreateLineBoxesForLayoutInline(alwaysCreateLineBoxes); }
     void updateAlwaysCreateLineBoxes(bool fullLayout);

     LayoutRect localCaretRect(InlineBox*, int, LayoutUnit* extraWidthToEndOfLine) final;

     bool hitTestCulledInline(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset);

     const char* name() const override { return "LayoutInline"; }

 protected:
     void willBeDestroyed() override;

     void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;

     void computeSelfHitTestRects(Vector<LayoutRect>& rects, const LayoutPoint& layerOffset) const override;

     void invalidateDisplayItemClients(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason, const LayoutRect* paintInvalidationRect) const override;

 private:
     LayoutObjectChildList* virtualChildren() final { return children(); }
     const LayoutObjectChildList* virtualChildren() const final { return children(); }
     const LayoutObjectChildList* children() const { return &m_children; }
     LayoutObjectChildList* children() { return &m_children; }

     bool isLayoutInline() const final { return true; }

     LayoutRect culledInlineVisualOverflowBoundingBox() const;
     InlineBox* culledInlineFirstLineBox() const;
     InlineBox* culledInlineLastLineBox() const;

     // For visualOverflowRect() only, to get bounding box of visual overflow of line boxes.
     LayoutRect linesVisualOverflowBoundingBox() const;

     template<typename GeneratorContext>
     void generateLineBoxRects(GeneratorContext& yield) const;
     template<typename GeneratorContext>
     void generateCulledLineBoxRects(GeneratorContext& yield, const LayoutInline* container) const;

     void addChildToContinuation(LayoutObject* newChild, LayoutObject* beforeChild);
     void addChildIgnoringContinuation(LayoutObject* newChild, LayoutObject* beforeChild = nullptr) final;

     void moveChildrenToIgnoringContinuation(LayoutInline* to, LayoutObject* startChild);

     void splitInlines(LayoutBlock* fromBlock, LayoutBlock* toBlock, LayoutBlock* middleBlock,
         LayoutObject* beforeChild, LayoutBoxModelObject* oldCont);
     void splitFlow(LayoutObject* beforeChild, LayoutBlock* newBlockBox,
         LayoutObject* newChild, LayoutBoxModelObject* oldCont);

     void layout() final { ASSERT_NOT_REACHED(); } // Do nothing for layout()

     void paint(const PaintInfo&, const LayoutPoint&) const final;

     bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) final;

     PaintLayerType layerTypeRequired() const override;

     LayoutUnit offsetLeft() const final;
     LayoutUnit offsetTop() const final;
     LayoutUnit offsetWidth() const final { return linesBoundingBox().width(); }
     LayoutUnit offsetHeight() const final { return linesBoundingBox().height(); }

     LayoutRect absoluteClippedOverflowRect() const override;
     LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = nullptr) const override;
     void mapToVisibleRectInContainerSpace(const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState*) const final;

     // This method differs from clippedOverflowRectForPaintInvalidation in that it includes
     // the rects for culled inline boxes, which aren't necessary for paint invalidation.
     LayoutRect clippedOverflowRect(const LayoutBoxModelObject*, const PaintInvalidationState* = nullptr) const;

     void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = nullptr) const override;

     PositionWithAffinity positionForPoint(const LayoutPoint&) final;

     IntRect borderBoundingBox() const final
     {
         IntRect boundingBox = linesBoundingBox();
         return IntRect(0, 0, boundingBox.width(), boundingBox.height());
     }

     virtual InlineFlowBox* createInlineFlowBox(); // Subclassed by SVG and Ruby

     void dirtyLinesFromChangedChild(LayoutObject* child) final { m_lineBoxes.dirtyLinesFromChangedChild(LineLayoutItem(this), LineLayoutItem(child)); }

     LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const final;
     int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const final;

     void childBecameNonInline(LayoutObject* child) final;

     void updateHitTestResult(HitTestResult&, const LayoutPoint&) final;

     void imageChanged(WrappedImagePtr, const IntRect* = nullptr) final;

     void addAnnotatedRegions(Vector<AnnotatedRegionValue>&) final;

     void updateFromStyle() final;

     LayoutInline* clone() const;

     LayoutBoxModelObject* continuationBefore(LayoutObject* beforeChild);

     LayoutObjectChildList m_children;
     LineBoxList m_lineBoxes; // All of the line boxes created for this inline flow.  For example, <i>Hello<br>world.</i> will have two <i> line boxes.
 };

 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutInline, isLayoutInline());

 } // namespace blink

 #endif // LayoutInline_h
	/*
	* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
	* (C) 1999 Antti Koivisto (koivisto@kde.org)
	* Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public License
	* along with this library; see the file COPYING.LIB. If not, write to
	* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*
	*/

	#ifndef LayoutInline_h
	#define LayoutInline_h

	#include "core/CoreExport.h"
	#include "core/editing/PositionWithAffinity.h"
	#include "core/layout/LayoutBoxModelObject.h"
	#include "core/layout/api/LineLayoutItem.h"
	#include "core/layout/line/InlineFlowBox.h"
	#include "core/layout/line/LineBoxList.h"

	namespace blink {

	// LayoutInline is the LayoutObject associated with display: inline.
	// This is called an "inline box" in CSS 2.1.
	// http://www.w3.org/TR/CSS2/visuren.html#inline-boxes
	//
	// It is also the base class for content that behaves in similar way (like
	// quotes and "display: ruby").
	//
	// Note that LayoutInline is always 'inline-level' but other LayoutObject
	// can be 'inline-level', which is why it's stored as a boolean on LayoutObject
	// (see LayoutObject::isInline()).
	//
	// For performance and memory consumption, this class ignores some inline-boxes
	// during line layout because they don't impact layout (they still exist and are
	// inserted into the layout tree). An example of this is
	// <span><span>Text</span></span>
	// where the 2 spans have the same size as the inner text-node so they can be
	// ignored for layout purpose, generating a single inline-box instead of 3.
	// One downside of this optimization is that we have extra work to do when
	// asking for bounding rects (see generateLineBoxRects).
	// This optimization is called "culled inline" in the code.
	//
	// LayoutInlines are expected to be laid out by their containing
	// LayoutBlockFlow. See LayoutBlockFlow::layoutInlineChildren.
	//
	//
	// *** CONTINUATIONS AND ANONYMOUS LAYOUTBLOCKFLOWS ***
	// LayoutInline enforces the following invariant:
	// "All in-flow children of an inline box are inline."
	// When a non-inline child is inserted, LayoutInline::addChild splits the inline
	// and potentially enclosing inlines too. It then wraps layout objects into
	// anonymous block-flow containers. This creates complexity in the code as:
	// - a DOM node can have several associated LayoutObjects (we don't currently
	// expose this information to the DOM code though).
	// - more importantly, nodes that are parent/child in the DOM have no natural
	// relationship anymore (see example below).
	// In order to do a correct tree walk over this synthetic tree, a single linked
	// list is stored called continuation. See splitFlow() about how it is
	// populated during LayoutInline split.
	//
	// Continuations can only be a LayoutInline or an anonymous LayoutBlockFlow.
	// That's why continuations are handled by LayoutBoxModelObject (common class
	// between the 2). See LayoutBoxModelObject::continuation and setContinuation.
	//
	// Let's take the following example:
	// <!DOCTYPE html>
	// <b>Bold inline.<div>Bold block.</div>More bold inlines.</b>
	//
	// The generated layout tree is:
	// LayoutBlockFlow {HTML}
	// LayoutBlockFlow {BODY}
	// LayoutBlockFlow (anonymous)
	// LayoutInline {B}
	// LayoutText {#text}
	// text run: "Bold inline."
	// LayoutBlockFlow (anonymous)
	// LayoutBlockFlow {DIV}
	// LayoutText {#text}
	// text run: "Bold block."
	// LayoutBlockFlow (anonymous)
	// LayoutInline {B}
	// LayoutText {#text}
	// text run: "More bold inlines."
	//
	// The insertion of the <div> inside the <b> forces the latter to be split
	// into 2 LayoutInlines and the insertion of anonymous LayoutBlockFlows. The 2
	// LayoutInlines are done so that we can apply the correct (bold) style to both
	// sides of the <div>. The continuation chain starts with the first
	// LayoutInline {B}, continues to the middle anonymous LayoutBlockFlow and
	// finishes with the last LayoutInline {B}.
	//
	// Note that the middle anonymous LayoutBlockFlow duplicates the content.
	// TODO(jchaffraix): Find out why we made the decision to always insert the
	// anonymous LayoutBlockFlows.
	//
	// This section was inspired by an older article by Dave Hyatt:
	// https://www.webkit.org/blog/115/webcore-rendering-ii-blocks-and-inlines/
	class CORE_EXPORT LayoutInline : public LayoutBoxModelObject {
	public:
	explicit LayoutInline(Element*);

	static LayoutInline* createAnonymous(Document*);

	LayoutObject* firstChild() const { ASSERT(children() == virtualChildren()); return children()->firstChild(); }
	LayoutObject* lastChild() const { ASSERT(children() == virtualChildren()); return children()->lastChild(); }

	// If you have a LayoutInline, use firstChild or lastChild instead.
	void slowFirstChild() const = delete;
	void slowLastChild() const = delete;

	void addChild(LayoutObject* newChild, LayoutObject* beforeChild = nullptr) override;

	Element* node() const { return toElement(LayoutBoxModelObject::node()); }

	LayoutRectOutsets marginBoxOutsets() const final;
	LayoutUnit marginLeft() const final;
	LayoutUnit marginRight() const final;
	LayoutUnit marginTop() const final;
	LayoutUnit marginBottom() const final;
	LayoutUnit marginBefore(const ComputedStyle* otherStyle = nullptr) const final;
	LayoutUnit marginAfter(const ComputedStyle* otherStyle = nullptr) const final;
	LayoutUnit marginStart(const ComputedStyle* otherStyle = nullptr) const final;
	LayoutUnit marginEnd(const ComputedStyle* otherStyle = nullptr) const final;
	LayoutUnit marginOver() const final;
	LayoutUnit marginUnder() const final;

	void absoluteRects(Vector<IntRect>&, const LayoutPoint& accumulatedOffset) const final;
	void absoluteQuads(Vector<FloatQuad>&, bool* wasFixed) const override;

	LayoutSize offsetFromContainer(const LayoutObject, const LayoutPoint&, bool offsetDependsOnPoint = nullptr) const final;

	IntRect linesBoundingBox() const;
	LayoutRect visualOverflowRect() const final;

	InlineFlowBox* createAndAppendInlineFlowBox();

	void dirtyLineBoxes(bool fullLayout);

	LineBoxList* lineBoxes() { return &m_lineBoxes; }
	const LineBoxList* lineBoxes() const { return &m_lineBoxes; }

	InlineFlowBox* firstLineBox() const { return m_lineBoxes.firstLineBox(); }
	InlineFlowBox* lastLineBox() const { return m_lineBoxes.lastLineBox(); }
	InlineBox* firstLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? firstLineBox() : culledInlineFirstLineBox(); }
	InlineBox* lastLineBoxIncludingCulling() const { return alwaysCreateLineBoxes() ? lastLineBox() : culledInlineLastLineBox(); }

	LayoutBoxModelObject* virtualContinuation() const final { return continuation(); }
	LayoutInline* inlineElementContinuation() const;

	void updateDragState(bool dragOn) final;

	LayoutSize offsetForInFlowPositionedInline(const LayoutBox& child) const;

	void addOutlineRects(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, IncludeBlockVisualOverflowOrNot) const final;
	// The following methods are called from the container if it has already added outline rects for line boxes
	// and/or children of this LayoutInline.
	void addOutlineRectsForChildrenAndContinuations(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, IncludeBlockVisualOverflowOrNot) const;
	void addOutlineRectsForContinuations(Vector<LayoutRect>&, const LayoutPoint& additionalOffset, IncludeBlockVisualOverflowOrNot) const;

	using LayoutBoxModelObject::continuation;
	using LayoutBoxModelObject::setContinuation;

	bool alwaysCreateLineBoxes() const { return alwaysCreateLineBoxesForLayoutInline(); }
	void setAlwaysCreateLineBoxes(bool alwaysCreateLineBoxes = true) { setAlwaysCreateLineBoxesForLayoutInline(alwaysCreateLineBoxes); }
	void updateAlwaysCreateLineBoxes(bool fullLayout);

	LayoutRect localCaretRect(InlineBox, int, LayoutUnit extraWidthToEndOfLine) final;

	bool hitTestCulledInline(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset);

	const char* name() const override { return "LayoutInline"; }

	protected:
	void willBeDestroyed() override;

	void styleDidChange(StyleDifference, const ComputedStyle* oldStyle) override;

	void computeSelfHitTestRects(Vector<LayoutRect>& rects, const LayoutPoint& layerOffset) const override;

	void invalidateDisplayItemClients(const LayoutBoxModelObject& paintInvalidationContainer, PaintInvalidationReason, const LayoutRect* paintInvalidationRect) const override;

	private:
	LayoutObjectChildList* virtualChildren() final { return children(); }
	const LayoutObjectChildList* virtualChildren() const final { return children(); }
	const LayoutObjectChildList* children() const { return &m_children; }
	LayoutObjectChildList* children() { return &m_children; }

	bool isLayoutInline() const final { return true; }

	LayoutRect culledInlineVisualOverflowBoundingBox() const;
	InlineBox* culledInlineFirstLineBox() const;
	InlineBox* culledInlineLastLineBox() const;

	// For visualOverflowRect() only, to get bounding box of visual overflow of line boxes.
	LayoutRect linesVisualOverflowBoundingBox() const;

	template<typename GeneratorContext>
	void generateLineBoxRects(GeneratorContext& yield) const;
	template<typename GeneratorContext>
	void generateCulledLineBoxRects(GeneratorContext& yield, const LayoutInline* container) const;

	void addChildToContinuation(LayoutObject* newChild, LayoutObject* beforeChild);
	void addChildIgnoringContinuation(LayoutObject* newChild, LayoutObject* beforeChild = nullptr) final;

	void moveChildrenToIgnoringContinuation(LayoutInline* to, LayoutObject* startChild);

	void splitInlines(LayoutBlock* fromBlock, LayoutBlock* toBlock, LayoutBlock* middleBlock,
	LayoutObject* beforeChild, LayoutBoxModelObject* oldCont);
	void splitFlow(LayoutObject* beforeChild, LayoutBlock* newBlockBox,
	LayoutObject* newChild, LayoutBoxModelObject* oldCont);

	void layout() final { ASSERT_NOT_REACHED(); } // Do nothing for layout()

	void paint(const PaintInfo&, const LayoutPoint&) const final;

	bool nodeAtPoint(HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) final;

	PaintLayerType layerTypeRequired() const override;

	LayoutUnit offsetLeft() const final;
	LayoutUnit offsetTop() const final;
	LayoutUnit offsetWidth() const final { return linesBoundingBox().width(); }
	LayoutUnit offsetHeight() const final { return linesBoundingBox().height(); }

	LayoutRect absoluteClippedOverflowRect() const override;
	LayoutRect clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* = nullptr) const override;
	void mapToVisibleRectInContainerSpace(const LayoutBoxModelObject* paintInvalidationContainer, LayoutRect&, const PaintInvalidationState*) const final;

	// This method differs from clippedOverflowRectForPaintInvalidation in that it includes
	// the rects for culled inline boxes, which aren't necessary for paint invalidation.
	LayoutRect clippedOverflowRect(const LayoutBoxModelObject, const PaintInvalidationState = nullptr) const;

	void mapLocalToContainer(const LayoutBoxModelObject* paintInvalidationContainer, TransformState&, MapCoordinatesFlags = ApplyContainerFlip, bool* wasFixed = 0, const PaintInvalidationState* = nullptr) const override;

	PositionWithAffinity positionForPoint(const LayoutPoint&) final;

	IntRect borderBoundingBox() const final
	{
	IntRect boundingBox = linesBoundingBox();
	return IntRect(0, 0, boundingBox.width(), boundingBox.height());
	}

	virtual InlineFlowBox* createInlineFlowBox(); // Subclassed by SVG and Ruby

	void dirtyLinesFromChangedChild(LayoutObject* child) final { m_lineBoxes.dirtyLinesFromChangedChild(LineLayoutItem(this), LineLayoutItem(child)); }

	LayoutUnit lineHeight(bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const final;
	int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const final;

	void childBecameNonInline(LayoutObject* child) final;

	void updateHitTestResult(HitTestResult&, const LayoutPoint&) final;

	void imageChanged(WrappedImagePtr, const IntRect* = nullptr) final;

	void addAnnotatedRegions(Vector<AnnotatedRegionValue>&) final;

	void updateFromStyle() final;

	LayoutInline* clone() const;

	LayoutBoxModelObject* continuationBefore(LayoutObject* beforeChild);

	LayoutObjectChildList m_children;
	LineBoxList m_lineBoxes; // All of the line boxes created for this inline flow. For example, <i>Hello<br>world.</i> will have two <i> line boxes.
	};

	DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutInline, isLayoutInline());

	} // namespace blink

	#endif // LayoutInline_h