#ifndef WidthIterator_h
#define WidthIterator_h
#include <wtf/HashSet.h>
#include <wtf/unicode/Unicode.h>
namespace WebCore {
class Font;
class GlyphBuffer;
class SimpleFontData;
class TextRun;
struct WidthIterator {
WidthIterator(const Font*, const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0, bool accountForGlyphBounds = false);
void advance(int to, GlyphBuffer* = 0);
bool advanceOneCharacter(float& width, GlyphBuffer* = 0);
float maxGlyphBoundingBoxY() const { ASSERT(m_accountForGlyphBounds); return m_maxGlyphBoundingBoxY; }
float minGlyphBoundingBoxY() const { ASSERT(m_accountForGlyphBounds); return m_minGlyphBoundingBoxY; }
float firstGlyphOverflow() const { ASSERT(m_accountForGlyphBounds); return m_firstGlyphOverflow; }
float lastGlyphOverflow() const { ASSERT(m_accountForGlyphBounds); return m_lastGlyphOverflow; }
const Font* m_font;
const TextRun& m_run;
int m_end;
unsigned m_currentCharacter;
float m_runWidthSoFar;
float m_padding;
float m_padPerSpace;
float m_finalRoundingWidth;
private:
UChar32 normalizeVoicingMarks(int currentCharacter);
HashSet<const SimpleFontData*>* m_fallbackFonts;
bool m_accountForGlyphBounds;
float m_maxGlyphBoundingBoxY;
float m_minGlyphBoundingBoxY;
float m_firstGlyphOverflow;
float m_lastGlyphOverflow;
};
}
#endif