#ifndef __dom_position_h__
#define __dom_position_h__
#include "text_affinity.h"
namespace DOM {
class CSSComputedStyleDeclarationImpl;
class ElementImpl;
class NodeImpl;
class Range;
class RangeImpl;
enum EStayInBlock { DoNotStayInBlock = false, StayInBlock = true };
enum EUsingComposedCharacters { NotUsingComposedCharacters = false, UsingComposedCharacters = true };
class Position
{
public:
Position() : m_node(0), m_offset(0) { }
Position(NodeImpl *node, long offset);
Position(const Position &);
~Position();
Position &operator=(const Position &o);
void clear();
NodeImpl *node() const { return m_node; }
long offset() const { return m_offset; }
bool isNull() const { return m_node == 0; }
bool isNotNull() const { return m_node != 0; }
ElementImpl *element() const;
CSSComputedStyleDeclarationImpl *computedStyle() const;
Position previous(EUsingComposedCharacters usingComposedCharacters=NotUsingComposedCharacters) const;
Position next(EUsingComposedCharacters usingComposedCharacters=NotUsingComposedCharacters) const;
bool atStart() const;
bool atEnd() const;
Position leadingWhitespacePosition(khtml::EAffinity affinity, bool considerNonCollapsibleWhitespace = false) const;
Position trailingWhitespacePosition(khtml::EAffinity affinity, bool considerNonCollapsibleWhitespace = false) const;
Position upstream(EStayInBlock stayInBlock = DoNotStayInBlock) const;
Position downstream(EStayInBlock stayInBlock = DoNotStayInBlock) const;
Position equivalentRangeCompliantPosition() const;
Position equivalentDeepPosition() const;
bool inRenderedContent() const;
bool isRenderedCharacter() const;
bool rendersInDifferentPosition(const Position &pos) const;
void debugPosition(const char *msg="") const;
#ifndef NDEBUG
void formatForDebugger(char *buffer, unsigned length) const;
#endif
private:
long renderedOffset() const;
bool inRenderedText() const;
Position previousCharacterPosition(khtml::EAffinity affinity) const;
Position nextCharacterPosition(khtml::EAffinity affinity) const;
NodeImpl *m_node;
long m_offset;
};
inline bool operator==(const Position &a, const Position &b)
{
return a.node() == b.node() && a.offset() == b.offset();
}
inline bool operator!=(const Position &a, const Position &b)
{
return !(a == b);
}
Position startPosition(const Range &);
Position startPosition(const RangeImpl *);
Position endPosition(const Range &);
Position endPosition(const RangeImpl *);
}
#endif // __dom_position_h__