#ifndef Position_h
#define Position_h
#include "Node.h"
#include "TextAffinity.h"
namespace WebCore {
class CSSComputedStyleDeclaration;
class Element;
class PositionIterator;
class Range;
enum EUsingComposedCharacters { NotUsingComposedCharacters = false, UsingComposedCharacters = true };
class Position
{
public:
Position() : m_node(0), m_offset(0) { }
Position(Node*, int offset);
Position(const PositionIterator&);
void clear();
Node *node() const { return m_node.get(); }
Element* documentElement() const;
int offset() const { return m_offset; }
bool isNull() const { return m_node == 0; }
bool isNotNull() const { return m_node != 0; }
Element* element() const;
PassRefPtr<CSSComputedStyleDeclaration> computedStyle() const;
Position previous(EUsingComposedCharacters usingComposedCharacters=NotUsingComposedCharacters) const;
Position next(EUsingComposedCharacters usingComposedCharacters=NotUsingComposedCharacters) const;
bool atStart() const;
bool atEnd() const;
Position leadingWhitespacePosition(EAffinity, bool considerNonCollapsibleWhitespace = false) const;
Position trailingWhitespacePosition(EAffinity, bool considerNonCollapsibleWhitespace = false) const;
Position upstream() const;
Position downstream() const;
bool isCandidate() const;
bool inRenderedText() const;
bool isRenderedCharacter() const;
bool rendersInDifferentPosition(const Position &pos) const;
static bool hasRenderedNonAnonymousDescendantsWithHeight(RenderObject*);
static bool nodeIsUserSelectNone(Node*);
void debugPosition(const char* msg = "") const;
#ifndef NDEBUG
void formatForDebugger(char* buffer, unsigned length) const;
void showTreeForThis() const;
#endif
private:
int renderedOffset() const;
Position previousCharacterPosition(EAffinity) const;
Position nextCharacterPosition(EAffinity) const;
RefPtr<Node> m_node;
int 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 endPosition(const Range*);
}
#ifndef NDEBUG
void showTree(const WebCore::Position&);
void showTree(const WebCore::Position*);
#endif
#endif // Position_h