SurrogatePairAwareTextIterator.h [plain text]
#ifndef SurrogatePairAwareTextIterator_h
#define SurrogatePairAwareTextIterator_h
#include <wtf/unicode/CharacterNames.h>
#include <wtf/text/WTFString.h>
namespace WebCore {
class SurrogatePairAwareTextIterator {
public:
SurrogatePairAwareTextIterator(const UChar*, unsigned currentIndex, unsigned lastIndex, unsigned endIndex);
inline bool consume(UChar32& character, unsigned& clusterLength)
{
if (m_currentIndex >= m_lastIndex)
return false;
character = *m_characters;
clusterLength = 1;
if (character < HiraganaLetterSmallA)
return true;
return consumeSlowCase(character, clusterLength);
}
void advance(unsigned advanceLength)
{
m_characters += advanceLength;
m_currentIndex += advanceLength;
}
unsigned currentIndex() const { return m_currentIndex; }
const UChar* characters() const { return m_characters; }
private:
bool consumeSlowCase(UChar32&, unsigned&);
UChar32 normalizeVoicingMarks();
const UChar* m_characters;
unsigned m_currentIndex;
unsigned m_lastIndex;
unsigned m_endIndex;
};
}
#endif