#ifndef VisibleUnits_h
#define VisibleUnits_h
#include "EditingBoundary.h"
#include "TextFlags.h"
#include "VisibleSelection.h"
namespace WebCore {
class Node;
class VisiblePosition;
class SimplifiedBackwardsTextIterator;
class TextIterator;
enum EWordSide { RightWordIfOnBoundary = false, LeftWordIfOnBoundary = true };
WEBCORE_EXPORT VisiblePosition startOfWord(const VisiblePosition &, EWordSide = RightWordIfOnBoundary);
WEBCORE_EXPORT VisiblePosition endOfWord(const VisiblePosition &, EWordSide = RightWordIfOnBoundary);
WEBCORE_EXPORT VisiblePosition previousWordPosition(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition nextWordPosition(const VisiblePosition &);
VisiblePosition rightWordPosition(const VisiblePosition&, bool skipsSpaceWhenMovingRight);
VisiblePosition leftWordPosition(const VisiblePosition&, bool skipsSpaceWhenMovingRight);
bool isStartOfWord(const VisiblePosition&);
WEBCORE_EXPORT VisiblePosition startOfSentence(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition endOfSentence(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition previousSentencePosition(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition nextSentencePosition(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition startOfLine(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition endOfLine(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition previousLinePosition(const VisiblePosition&, int lineDirectionPoint, EditableType = ContentIsEditable);
WEBCORE_EXPORT VisiblePosition nextLinePosition(const VisiblePosition&, int lineDirectionPoint, EditableType = ContentIsEditable);
WEBCORE_EXPORT bool inSameLine(const VisiblePosition &, const VisiblePosition &);
WEBCORE_EXPORT bool isStartOfLine(const VisiblePosition &);
WEBCORE_EXPORT bool isEndOfLine(const VisiblePosition &);
VisiblePosition logicalStartOfLine(const VisiblePosition &, bool* reachedBoundary = nullptr);
VisiblePosition logicalEndOfLine(const VisiblePosition &, bool* reachedBoundary = nullptr);
bool isLogicalEndOfLine(const VisiblePosition &);
VisiblePosition leftBoundaryOfLine(const VisiblePosition&, TextDirection, bool* reachedBoundary);
VisiblePosition rightBoundaryOfLine(const VisiblePosition&, TextDirection, bool* reachedBoundary);
WEBCORE_EXPORT VisiblePosition startOfParagraph(const VisiblePosition&, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
WEBCORE_EXPORT VisiblePosition endOfParagraph(const VisiblePosition&, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
VisiblePosition startOfNextParagraph(const VisiblePosition&);
WEBCORE_EXPORT VisiblePosition previousParagraphPosition(const VisiblePosition &, int x);
WEBCORE_EXPORT VisiblePosition nextParagraphPosition(const VisiblePosition &, int x);
WEBCORE_EXPORT bool isStartOfParagraph(const VisiblePosition &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
WEBCORE_EXPORT bool isEndOfParagraph(const VisiblePosition &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
bool inSameParagraph(const VisiblePosition &, const VisiblePosition &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
VisiblePosition startOfBlock(const VisiblePosition &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
VisiblePosition endOfBlock(const VisiblePosition &, EditingBoundaryCrossingRule = CannotCrossEditingBoundary);
bool inSameBlock(const VisiblePosition &, const VisiblePosition &);
bool isStartOfBlock(const VisiblePosition &);
bool isEndOfBlock(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition startOfDocument(const Node*);
WEBCORE_EXPORT VisiblePosition endOfDocument(const Node*);
WEBCORE_EXPORT VisiblePosition startOfDocument(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition endOfDocument(const VisiblePosition &);
bool inSameDocument(const VisiblePosition &, const VisiblePosition &);
WEBCORE_EXPORT bool isStartOfDocument(const VisiblePosition &);
WEBCORE_EXPORT bool isEndOfDocument(const VisiblePosition &);
WEBCORE_EXPORT VisiblePosition startOfEditableContent(const VisiblePosition&);
WEBCORE_EXPORT VisiblePosition endOfEditableContent(const VisiblePosition&);
WEBCORE_EXPORT bool isEndOfEditableOrNonEditableContent(const VisiblePosition&);
WEBCORE_EXPORT bool atBoundaryOfGranularity(const VisiblePosition&, TextGranularity, SelectionDirection);
WEBCORE_EXPORT bool withinTextUnitOfGranularity(const VisiblePosition&, TextGranularity, SelectionDirection);
WEBCORE_EXPORT VisiblePosition positionOfNextBoundaryOfGranularity(const VisiblePosition&, TextGranularity, SelectionDirection);
WEBCORE_EXPORT RefPtr<Range> enclosingTextUnitOfGranularity(const VisiblePosition&, TextGranularity, SelectionDirection);
WEBCORE_EXPORT int distanceBetweenPositions(const VisiblePosition&, const VisiblePosition&);
WEBCORE_EXPORT RefPtr<Range> wordRangeFromPosition(const VisiblePosition&);
WEBCORE_EXPORT VisiblePosition closestWordBoundaryForPosition(const VisiblePosition& position);
WEBCORE_EXPORT void charactersAroundPosition(const VisiblePosition&, UChar32& oneAfter, UChar32& oneBefore, UChar32& twoBefore);
WEBCORE_EXPORT RefPtr<Range> rangeExpandedAroundPositionByCharacters(const VisiblePosition&, int numberOfCharactersToExpand);
WEBCORE_EXPORT RefPtr<Range> rangeExpandedByCharactersInDirectionAtWordBoundary(const VisiblePosition&, int numberOfCharactersToExpand, SelectionDirection);
enum BoundarySearchContextAvailability { DontHaveMoreContext, MayHaveMoreContext };
typedef unsigned (*BoundarySearchFunction)(StringView, unsigned offset, BoundarySearchContextAvailability, bool& needMoreContext);
unsigned startWordBoundary(StringView, unsigned, BoundarySearchContextAvailability, bool&);
unsigned endWordBoundary(StringView, unsigned, BoundarySearchContextAvailability, bool&);
unsigned startSentenceBoundary(StringView, unsigned, BoundarySearchContextAvailability, bool&);
unsigned endSentenceBoundary(StringView, unsigned, BoundarySearchContextAvailability, bool&);
unsigned suffixLengthForRange(RefPtr<Range>, Vector<UChar, 1024>&);
unsigned prefixLengthForRange(RefPtr<Range>, Vector<UChar, 1024>&);
unsigned backwardSearchForBoundaryWithTextIterator(SimplifiedBackwardsTextIterator&, Vector<UChar, 1024>&, unsigned, BoundarySearchFunction);
unsigned forwardSearchForBoundaryWithTextIterator(TextIterator&, Vector<UChar, 1024>&, unsigned, BoundarySearchFunction);
Node* findStartOfParagraph(Node*, Node*, Node*, int&, Position::AnchorType&, EditingBoundaryCrossingRule);
Node* findEndOfParagraph(Node*, Node*, Node*, int&, Position::AnchorType&, EditingBoundaryCrossingRule);
}
#endif // VisibleUnits_h