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/*
* Copyright (C) 2003, 2006, 2007, 2008, 2013 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.
*
*/
#pragma once
#include "BidiContext.h"
#include "InlineFlowBox.h"
#include "RenderBox.h"
#include <wtf/WeakPtr.h>
namespace WebCore {
class EllipsisBox;
class HitTestResult;
class LogicalSelectionOffsetCaches;
class RenderBlockFlow;
class RenderFragmentContainer;
struct BidiStatus;
struct GapRects;
class RootInlineBox : public InlineFlowBox, public CanMakeWeakPtr<RootInlineBox> {
WTF_MAKE_ISO_ALLOCATED(RootInlineBox);
public:
explicit RootInlineBox(RenderBlockFlow&);
virtual ~RootInlineBox();
RenderBlockFlow& blockFlow() const;
void detachEllipsisBox();
RootInlineBox* nextRootBox() const;
RootInlineBox* prevRootBox() const;
void adjustPosition(float dx, float dy) 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_paginationStrut; }
void setPaginationStrut(LayoutUnit strut) { m_paginationStrut = strut; }
bool isFirstAfterPageBreak() const { return m_isFirstAfterPageBreak; }
void setIsFirstAfterPageBreak(bool isFirstAfterPageBreak) { m_isFirstAfterPageBreak = isFirstAfterPageBreak; }
LayoutUnit paginatedLineWidth() const { return m_paginatedLineWidth; }
void setPaginatedLineWidth(LayoutUnit width) { m_paginatedLineWidth = width; }
// It should not be assumed the containingFragment() is always valid.
// It can also be nullptr if the flow has no fragment chain.
RenderFragmentContainer* containingFragment() const;
void setContainingFragment(RenderFragmentContainer&);
void clearContainingFragment();
enum class ForHitTesting : bool { No, Yes };
LayoutUnit selectionTop(ForHitTesting = ForHitTesting::No) const;
LayoutUnit selectionBottom() const;
LayoutUnit selectionHeight() const { return std::max<LayoutUnit>(0, selectionBottom() - selectionTop()); }
LayoutUnit selectionTopAdjustedForPrecedingBlock() const;
LayoutUnit selectionHeightAdjustedForPrecedingBlock() const { return std::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;
}
RenderObject* lineBreakObj() const { return m_lineBreakObj.get(); }
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 AtomString& ellipsisStr, bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, InlineBox* markupBox = nullptr);
// Return the position of the EllipsisBox or -1.
float placeEllipsisBox(bool ltr, float blockLeftEdge, float blockRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox) final;
using InlineBox::hasEllipsisBox;
EllipsisBox* ellipsisBox() const;
void paintEllipsisBox(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) const;
void clearTruncation() final;
bool isHyphenated() const;
int baselinePosition(FontBaseline baselineType) const final;
LayoutUnit lineHeight() const final;
void paint(PaintInfo&, const LayoutPoint&, LayoutUnit lineTop, LayoutUnit lineBottom) override;
bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom, HitTestAction) override;
using InlineBox::hasSelectedChildren;
using InlineBox::setHasSelectedChildren;
RenderObject::HighlightState selectionState() final;
InlineBox* firstSelectedBox();
InlineBox* lastSelectedBox();
GapRects lineSelectionGap(RenderBlock& rootBlock, const LayoutPoint& rootBlockPhysicalPosition, const LayoutSize& offsetFromRootBlock,
LayoutUnit selTop, LayoutUnit selHeight, const LogicalSelectionOffsetCaches&, const PaintInfo*);
IntRect computeCaretRect(float logicalLeftPosition, unsigned caretWidth, LayoutUnit* extraWidthToEndOfLine) const;
InlineBox* closestLeafChildForPoint(const IntPoint&, bool onlyEditableLeaves);
InlineBox* closestLeafChildForLogicalLeftPosition(int, bool onlyEditableLeaves = false);
using CleanLineFloatList = Vector<WeakPtr<RenderBox>>;
void appendFloat(RenderBox& floatingBox)
{
ASSERT(!isDirty());
if (m_floats)
m_floats->append(makeWeakPtr(floatingBox));
else
m_floats = makeUnique<CleanLineFloatList>(1, makeWeakPtr(floatingBox));
}
void removeFloat(RenderBox& floatingBox)
{
ASSERT(m_floats);
ASSERT(m_floats->contains(&floatingBox));
m_floats->remove(m_floats->find(&floatingBox));
}
CleanLineFloatList* floatsPtr() { ASSERT(!isDirty()); return m_floats.get(); }
void extractLineBoxFromRenderObject() final;
void attachLineBoxToRenderObject() final;
void removeLineBoxFromRenderObject() 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 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());
}
Node* getLogicalStartBoxWithNode(InlineBox*&) const;
Node* getLogicalEndBoxWithNode(InlineBox*&) const;
virtual bool isTrailingFloatsRootInlineBox() const { return false; }
#if ENABLE(TREE_DEBUGGING)
const char* boxName() const final;
#endif
private:
bool isRootInlineBox() const final { return true; }
bool includeLeadingForBox(InlineBox&) const;
bool includeFontForBox(InlineBox&) const;
bool includeGlyphsForBox(InlineBox&) const;
bool includeInitialLetterForBox(InlineBox&) const;
bool includeMarginForBox(InlineBox&) const;
LayoutUnit lineSnapAdjustment(LayoutUnit delta = 0_lu) const;
LayoutUnit beforeAnnotationsAdjustment() const;
// 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.
WeakPtr<RenderObject> m_lineBreakObj;
RefPtr<BidiContext> m_lineBreakContext;
LayoutUnit m_lineTop;
LayoutUnit m_lineBottom;
LayoutUnit m_lineTopWithLeading;
LayoutUnit m_lineBottomWithLeading;
LayoutUnit m_paginationStrut;
LayoutUnit m_paginatedLineWidth;
// 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.
std::unique_ptr<CleanLineFloatList> m_floats;
unsigned m_lineBreakPos { 0 };
};
inline RootInlineBox* RootInlineBox::nextRootBox() const
{
return downcast<RootInlineBox>(m_nextLineBox);
}
inline RootInlineBox* RootInlineBox::prevRootBox() const
{
return downcast<RootInlineBox>(m_prevLineBox);
}
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_INLINE_BOX(RootInlineBox, isRootInlineBox())