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* Copyright (C) 2003, 2006, 2007, 2008 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
* 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 RootInlineBox_h
#define RootInlineBox_h
#include "core/rendering/InlineFlowBox.h"
#include "platform/text/BidiContext.h"
namespace WebCore {
class EllipsisBox;
class HitTestResult;
class RenderRegion;
struct BidiStatus;
struct GapRects;
class RootInlineBox : public InlineFlowBox {
explicit RootInlineBox(RenderBlock*);
virtual void destroy() OVERRIDE FINAL;
virtual bool isRootInlineBox() const OVERRIDE FINAL { return true; }
void detachEllipsisBox();
RootInlineBox* nextRootBox() const { return static_cast<RootInlineBox*>(m_nextLineBox); }
RootInlineBox* prevRootBox() const { return static_cast<RootInlineBox*>(m_prevLineBox); }
virtual void adjustPosition(float dx, float dy) OVERRIDE FINAL;
LayoutUnit lineTop() const { return m_lineTop; }
LayoutUnit lineBottom() const { return m_lineBottom; }
LayoutUnit lineTopWithLeading() const { return m_lineTopWithLeading; }
LayoutUnit lineBottomWithLeading() const { return m_lineBottomWithLeading; }
LayoutUnit paginationStrut() const { return m_fragmentationData ? m_fragmentationData->m_paginationStrut : LayoutUnit(0); }
void setPaginationStrut(LayoutUnit strut) { ensureLineFragmentationData()->m_paginationStrut = strut; }
bool isFirstAfterPageBreak() const { return m_fragmentationData ? m_fragmentationData->m_isFirstAfterPageBreak : false; }
void setIsFirstAfterPageBreak(bool isFirstAfterPageBreak) { ensureLineFragmentationData()->m_isFirstAfterPageBreak = isFirstAfterPageBreak; }
LayoutUnit paginatedLineWidth() const { return m_fragmentationData ? m_fragmentationData->m_paginatedLineWidth : LayoutUnit(0); }
void setPaginatedLineWidth(LayoutUnit width) { ensureLineFragmentationData()->m_paginatedLineWidth = width; }
RenderRegion* containingRegion() const;
void setContainingRegion(RenderRegion*);
LayoutUnit selectionTop() const;
LayoutUnit selectionBottom() const;
LayoutUnit selectionHeight() const { return max<LayoutUnit>(0, selectionBottom() - selectionTop()); }
LayoutUnit selectionTopAdjustedForPrecedingBlock() const;
LayoutUnit selectionHeightAdjustedForPrecedingBlock() const { return max<LayoutUnit>(0, selectionBottom() - selectionTopAdjustedForPrecedingBlock()); }
int blockDirectionPointInLine() const;
LayoutUnit alignBoxesInBlockDirection(LayoutUnit heightOfBlock, GlyphOverflowAndFallbackFontsMap&, VerticalPositionCache&);
void setLineTopBottomPositions(LayoutUnit top, LayoutUnit bottom, LayoutUnit topWithLeading, LayoutUnit bottomWithLeading)
m_lineTop = top;
m_lineBottom = bottom;
m_lineTopWithLeading = topWithLeading;
m_lineBottomWithLeading = bottomWithLeading;
virtual RenderLineBoxList* rendererLineBoxes() const OVERRIDE FINAL;
RenderObject* lineBreakObj() const { return m_lineBreakObj; }
BidiStatus lineBreakBidiStatus() const;
void setLineBreakInfo(RenderObject*, unsigned breakPos, const BidiStatus&);
unsigned lineBreakPos() const { return m_lineBreakPos; }
void setLineBreakPos(unsigned p) { m_lineBreakPos = p; }
using InlineBox::endsWithBreak;
using InlineBox::setEndsWithBreak;
void childRemoved(InlineBox* box);
bool lineCanAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth);
// Return the truncatedWidth, the width of the truncated text + ellipsis.
float placeEllipsis(const AtomicString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox = 0);
// Return the position of the EllipsisBox or -1.
virtual float placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) OVERRIDE FINAL;
using InlineBox::hasEllipsisBox;
EllipsisBox* ellipsisBox() const;
void paintEllipsisBox(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) const;
virtual void clearTruncation() OVERRIDE FINAL;
bool isHyphenated() const;
virtual int baselinePosition(FontBaseline baselineType) const OVERRIDE FINAL;
virtual LayoutUnit lineHeight() const OVERRIDE FINAL;
virtual void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom);
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom) OVERRIDE FINAL;
using InlineBox::hasSelectedChildren;
using InlineBox::setHasSelectedChildren;
virtual RenderObject::SelectionState selectionState() OVERRIDE FINAL;
InlineBox* firstSelectedBox();
InlineBox* lastSelectedBox();
GapRects lineSelectionGap(RenderBlock* rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock, LayoutUnit selTop, LayoutUnit selHeight, const PaintInfo*);
RenderBlock* block() const;
InlineBox* closestLeafChildForPoint(const IntPoint&, bool onlyEditableLeaves);
InlineBox* closestLeafChildForLogicalLeftPosition(int, bool onlyEditableLeaves = false);
void appendFloat(RenderBox* floatingBox)
if (m_floats)
m_floats= adoptPtr(new Vector<RenderBox*>(1, floatingBox));
Vector<RenderBox*>* floatsPtr() { ASSERT(!isDirty()); return m_floats.get(); }
virtual void extractLineBoxFromRenderObject() OVERRIDE FINAL;
virtual void attachLineBoxToRenderObject() OVERRIDE FINAL;
virtual void removeLineBoxFromRenderObject() OVERRIDE FINAL;
FontBaseline baselineType() const { return static_cast<FontBaseline>(m_baselineType); }
bool hasAnnotationsBefore() const { return m_hasAnnotationsBefore; }
bool hasAnnotationsAfter() const { return m_hasAnnotationsAfter; }
LayoutRect paddedLayoutOverflowRect(LayoutUnit endPadding) const;
void ascentAndDescentForBox(InlineBox*, GlyphOverflowAndFallbackFontsMap&, int& ascent, int& descent, bool& affectsAscent, bool& affectsDescent) const;
LayoutUnit verticalPositionForBox(InlineBox*, VerticalPositionCache&);
bool includeLeadingForBox(InlineBox*) const;
bool includeFontForBox(InlineBox*) const;
bool includeGlyphsForBox(InlineBox*) const;
bool includeMarginForBox(InlineBox*) const;
bool fitsToGlyphs() const;
bool includesRootLineBoxFontOrLeading() const;
LayoutUnit logicalTopVisualOverflow() const
return InlineFlowBox::logicalTopVisualOverflow(lineTop());
LayoutUnit logicalBottomVisualOverflow() const
return InlineFlowBox::logicalBottomVisualOverflow(lineBottom());
LayoutUnit logicalTopLayoutOverflow() const
return InlineFlowBox::logicalTopLayoutOverflow(lineTop());
LayoutUnit logicalBottomLayoutOverflow() const
return InlineFlowBox::logicalBottomLayoutOverflow(lineBottom());
// Used to calculate the underline offset for TextUnderlinePositionUnder.
float maxLogicalTop() const;
#endif // CSS3_TEXT
Node* getLogicalStartBoxWithNode(InlineBox*&) const;
Node* getLogicalEndBoxWithNode(InlineBox*&) const;
#ifndef NDEBUG
virtual const char* boxName() const;
LayoutUnit lineSnapAdjustment(LayoutUnit delta = 0) const;
LayoutUnit beforeAnnotationsAdjustment() const;
struct LineFragmentationData;
LineFragmentationData* ensureLineFragmentationData()
if (!m_fragmentationData)
m_fragmentationData = adoptPtr(new LineFragmentationData());
return m_fragmentationData.get();
// This folds into the padding at the end of InlineFlowBox on 64-bit.
unsigned m_lineBreakPos;
// Where this line ended. The exact object and the position within that object are stored so that
// we can create an InlineIterator beginning just after the end of this line.
RenderObject* m_lineBreakObj;
RefPtr<BidiContext> m_lineBreakContext;
LayoutUnit m_lineTop;
LayoutUnit m_lineBottom;
LayoutUnit m_lineTopWithLeading;
LayoutUnit m_lineBottomWithLeading;
struct LineFragmentationData {
: m_containingRegion(0)
, m_paginationStrut(0)
, m_paginatedLineWidth(0)
, m_isFirstAfterPageBreak(false)
// It should not be assumed the |containingRegion| is always valid.
// It can also be 0 if the flow has no region chain.
RenderRegion* m_containingRegion;
LayoutUnit m_paginationStrut;
LayoutUnit m_paginatedLineWidth;
bool m_isFirstAfterPageBreak;
OwnPtr<LineFragmentationData> m_fragmentationData;
// Floats hanging off the line are pushed into this vector during layout. It is only
// good for as long as the line has not been marked dirty.
OwnPtr<Vector<RenderBox*> > m_floats;
} // namespace WebCore
#endif // RootInlineBox_h