#ifndef LayoutState_h
#define LayoutState_h
#include "ColumnInfo.h"
#include "LayoutRect.h"
#include <wtf/HashMap.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
class RenderArena;
class RenderBlock;
class RenderBox;
class RenderObject;
class RenderFlowThread;
#if ENABLE(CSS_SHAPES)
class ShapeInsideInfo;
#endif
class LayoutState {
WTF_MAKE_NONCOPYABLE(LayoutState);
public:
LayoutState()
: m_clipped(false)
, m_isPaginated(false)
, m_pageLogicalHeightChanged(false)
#if !ASSERT_DISABLED && ENABLE(SATURATED_LAYOUT_ARITHMETIC)
, m_layoutDeltaXSaturated(false)
, m_layoutDeltaYSaturated(false)
#endif
, m_columnInfo(0)
, m_lineGrid(0)
, m_next(0)
#if ENABLE(CSS_SHAPES)
, m_shapeInsideInfo(0)
#endif
, m_pageLogicalHeight(0)
#ifndef NDEBUG
, m_renderer(0)
#endif
{
}
LayoutState(LayoutState*, RenderBox*, const LayoutSize& offset, LayoutUnit pageHeight, bool pageHeightChanged, ColumnInfo*);
LayoutState(RenderObject*);
void destroy(RenderArena*);
void* operator new(size_t, RenderArena*);
void operator delete(void*, size_t);
void clearPaginationInformation();
bool isPaginatingColumns() const { return m_columnInfo && m_columnInfo->paginationUnit() == ColumnInfo::Column; }
bool isPaginated() const { return m_isPaginated; }
LayoutUnit pageLogicalOffset(RenderBox*, LayoutUnit childLogicalOffset) const;
void addForcedColumnBreak(RenderBox*, LayoutUnit childLogicalOffset);
LayoutUnit pageLogicalHeight() const { return m_pageLogicalHeight; }
bool pageLogicalHeightChanged() const { return m_pageLogicalHeightChanged; }
RenderBlock* lineGrid() const { return m_lineGrid; }
LayoutSize lineGridOffset() const { return m_lineGridOffset; }
LayoutSize lineGridPaginationOrigin() const { return m_lineGridPaginationOrigin; }
LayoutSize layoutOffset() const { return m_layoutOffset; }
bool needsBlockDirectionLocationSetBeforeLayout() const { return m_lineGrid || (m_isPaginated && m_pageLogicalHeight); }
#if ENABLE(CSS_SHAPES)
ShapeInsideInfo* shapeInsideInfo() const { return m_shapeInsideInfo; }
#endif
private:
void* operator new(size_t) throw();
void propagateLineGridInfo(RenderBox*);
void establishLineGrid(RenderBlock*);
void computeLineGridPaginationOrigin(RenderBox*);
public:
bool m_clipped:1;
bool m_isPaginated:1;
bool m_pageLogicalHeightChanged:1;
#if !ASSERT_DISABLED && ENABLE(SATURATED_LAYOUT_ARITHMETIC)
bool m_layoutDeltaXSaturated:1;
bool m_layoutDeltaYSaturated:1;
#endif
ColumnInfo* m_columnInfo;
RenderBlock* m_lineGrid;
LayoutState* m_next;
#if ENABLE(CSS_SHAPES)
ShapeInsideInfo* m_shapeInsideInfo;
#endif
LayoutRect m_clipRect;
LayoutSize m_paintOffset;
LayoutSize m_layoutOffset;
LayoutSize m_layoutDelta;
LayoutUnit m_pageLogicalHeight;
LayoutSize m_pageOffset;
LayoutSize m_lineGridOffset;
LayoutSize m_lineGridPaginationOrigin;
#ifndef NDEBUG
RenderObject* m_renderer;
#endif
};
}
#endif // LayoutState_h