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/*
* This file is part of the line box implementation for KDE.
*
* 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
* 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 RootInlineBox_h
#define RootInlineBox_h
#include "BidiContext.h"
#include "InlineFlowBox.h"
namespace WebCore {
class BidiStatus;
class EllipsisBox;
class HitTestResult;
struct GapRects;
class RootInlineBox : public InlineFlowBox {
public:
RootInlineBox(RenderObject* obj)
: InlineFlowBox(obj)
, m_overflow(0)
, m_lineBreakObj(0)
, m_lineBreakPos(0)
{
}
virtual bool isRootInlineBox() { return true; }
virtual void destroy(RenderArena*);
void detachEllipsisBox(RenderArena*);
RootInlineBox* nextRootBox() { return static_cast<RootInlineBox*>(m_nextLine); }
RootInlineBox* prevRootBox() { return static_cast<RootInlineBox*>(m_prevLine); }
virtual void adjustPosition(int dx, int dy);
virtual int topOverflow() { return m_overflow ? m_overflow->m_topOverflow : m_y; }
virtual int bottomOverflow() { return m_overflow ? m_overflow->m_bottomOverflow : m_y + m_height; }
virtual int leftOverflow() { return m_overflow ? m_overflow->m_leftOverflow : m_x; }
virtual int rightOverflow() { return m_overflow ? m_overflow->m_rightOverflow : m_x + m_width; }
virtual void setVerticalOverflowPositions(int top, int bottom);
void setHorizontalOverflowPositions(int left, int right);
virtual void setVerticalSelectionPositions(int top, int bottom);
#if ENABLE(SVG)
virtual void computePerCharacterLayoutInformation() { }
#endif
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; }
int blockHeight() const { return m_blockHeight; }
void setBlockHeight(int h) { m_blockHeight = h; }
bool endsWithBreak() const { return m_endsWithBreak; }
void setEndsWithBreak(bool b) { m_endsWithBreak = b; }
void childRemoved(InlineBox* box);
bool canAccommodateEllipsis(bool ltr, int blockEdge, int lineBoxEdge, int ellipsisWidth);
void placeEllipsis(const AtomicString& ellipsisStr, bool ltr, int blockEdge, int ellipsisWidth, InlineBox* markupBox = 0);
virtual int placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox);
EllipsisBox* ellipsisBox() const;
void paintEllipsisBox(RenderObject::PaintInfo&, int tx, int ty) const;
bool hitTestEllipsisBox(HitTestResult&, int x, int y, int tx, int ty, HitTestAction, bool);
virtual void clearTruncation();
#if PLATFORM(MAC)
void addHighlightOverflow();
void paintCustomHighlight(RenderObject::PaintInfo&, int tx, int ty, const AtomicString& highlightType);
#endif
virtual void paint(RenderObject::PaintInfo&, int tx, int ty);
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int);
bool hasSelectedChildren() const { return m_hasSelectedChildren; }
void setHasSelectedChildren(bool);
virtual RenderObject::SelectionState selectionState();
InlineBox* firstSelectedBox();
InlineBox* lastSelectedBox();
GapRects fillLineSelectionGap(int selTop, int selHeight, RenderBlock* rootBlock, int blockX, int blockY,
int tx, int ty, const RenderObject::PaintInfo*);
RenderBlock* block() const;
int selectionTop();
int selectionBottom() { return m_overflow ? m_overflow->m_selectionBottom : m_y + m_height; }
int selectionHeight() { return max(0, selectionBottom() - selectionTop()); }
InlineBox* closestLeafChildForXPos(int x, bool onlyEditableLeaves = false);
Vector<RenderObject*>& floats()
{
ASSERT(!isDirty());
if (!m_overflow)
m_overflow = new (m_object->renderArena()) Overflow(this);
return m_overflow->floats;
}
Vector<RenderObject*>* floatsPtr() { ASSERT(!isDirty()); return m_overflow ? &m_overflow->floats : 0; }
protected:
// Normally we are only as tall as the style on our block dictates, but we might have content
// that spills out above the height of our font (e.g, a tall image), or something that extends further
// below our line (e.g., a child whose font has a huge descent).
// Allocated only when some of these fields have non-default values
struct Overflow {
Overflow(RootInlineBox* box)
: m_topOverflow(box->m_y)
, m_bottomOverflow(box->m_y + box->m_height)
, m_leftOverflow(box->m_x)
, m_rightOverflow(box->m_x + box->m_width)
, m_selectionTop(box->m_y)
, m_selectionBottom(box->m_y + box->m_height)
{
}
void destroy(RenderArena*);
void* operator new(size_t, RenderArena*) throw();
void operator delete(void*, size_t);
int m_topOverflow;
int m_bottomOverflow;
int m_leftOverflow;
int m_rightOverflow;
int m_selectionTop;
int m_selectionBottom;
// 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.
Vector<RenderObject*> floats;
private:
void* operator new(size_t) throw();
};
Overflow* m_overflow;
// 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;
unsigned m_lineBreakPos;
RefPtr<BidiContext> m_lineBreakContext;
// The height of the block at the end of this line. This is where the next line starts.
int m_blockHeight;
WTF::Unicode::Direction m_lineBreakBidiStatusEor : 5;
WTF::Unicode::Direction m_lineBreakBidiStatusLastStrong : 5;
WTF::Unicode::Direction m_lineBreakBidiStatusLast : 5;
};
inline void RootInlineBox::setHorizontalOverflowPositions(int left, int right)
{
if (!m_overflow) {
if (left == m_x && right == m_x + m_width)
return;
m_overflow = new (m_object->renderArena()) Overflow(this);
}
m_overflow->m_leftOverflow = left;
m_overflow->m_rightOverflow = right;
}
inline void RootInlineBox::setVerticalSelectionPositions(int top, int bottom)
{
if (!m_overflow) {
if (top == m_y && bottom == m_y + m_height)
return;
m_overflow = new (m_object->renderArena()) Overflow(this);
}
m_overflow->m_selectionTop = top;
m_overflow->m_selectionBottom = bottom;
}
} // namespace WebCore
#endif // RootInlineBox_h
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