#ifndef Position_h
#define Position_h
#include "TextAffinity.h"
#include "TextDirection.h"
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
namespace WebCore {
class CSSComputedStyleDeclaration;
class Element;
class InlineBox;
class Node;
class Range;
class RenderObject;
enum EUsingComposedCharacters { NotUsingComposedCharacters = false, UsingComposedCharacters = true };
class Position {
public:
RefPtr<Node> container;
int posOffset;
Position() : posOffset(0) { }
Position(PassRefPtr<Node> c, int o) : container(c), posOffset(o) { }
void clear() { container.clear(); posOffset = 0; }
Node* node() const { return container.get(); }
int offset() const { return posOffset; }
Element* documentElement() const;
bool isNull() const { return !container; }
bool isNotNull() const { return container; }
Element* element() const;
PassRefPtr<CSSComputedStyleDeclaration> computedStyle() const;
Position previous(EUsingComposedCharacters usingComposedCharacters=NotUsingComposedCharacters) const;
Position next(EUsingComposedCharacters usingComposedCharacters=NotUsingComposedCharacters) const;
static int uncheckedPreviousOffset(const Node*, int current);
static int uncheckedNextOffset(const Node*, int current);
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&) const;
void getInlineBoxAndOffset(EAffinity, InlineBox*&, int& caretOffset) const;
void getInlineBoxAndOffset(EAffinity, TextDirection primaryDirection, InlineBox*&, int& caretOffset) 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;
};
inline bool operator==(const Position& a, const Position& b)
{
return a.container == b.container && a.posOffset == b.posOffset;
}
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