#ifndef WidthIterator_h
#define WidthIterator_h
#include "SVGGlyph.h"
#include <wtf/HashSet.h>
#include <wtf/Vector.h>
#include <wtf/unicode/Unicode.h>
namespace WebCore {
class Font;
class GlyphBuffer;
class SimpleFontData;
class TextRun;
struct GlyphData;
struct WidthIterator {
WidthIterator(const Font*, const TextRun&, HashSet<const SimpleFontData*>* fallbackFonts = 0, bool accountForGlyphBounds = false, bool forTextEmphasis = false);
unsigned 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 TextRun& run() const { return m_run; }
float runWidthSoFar() const { return m_runWidthSoFar; }
#if ENABLE(SVG_FONTS)
String lastGlyphName() const { return m_lastGlyphName; }
void setLastGlyphName(const String& name) { m_lastGlyphName = name; }
Vector<SVGGlyph::ArabicForm>& arabicForms() { return m_arabicForms; }
#endif
const Font* m_font;
const TextRun& m_run;
unsigned m_currentCharacter;
float m_runWidthSoFar;
float m_expansion;
float m_expansionPerOpportunity;
bool m_isAfterExpansion;
float m_finalRoundingWidth;
#if ENABLE(SVG_FONTS)
String m_lastGlyphName;
Vector<SVGGlyph::ArabicForm> m_arabicForms;
#endif
private:
GlyphData glyphDataForCharacter(UChar32, bool mirror, int currentCharacter, unsigned& advanceLength);
HashSet<const SimpleFontData*>* m_fallbackFonts;
bool m_accountForGlyphBounds;
float m_maxGlyphBoundingBoxY;
float m_minGlyphBoundingBoxY;
float m_firstGlyphOverflow;
float m_lastGlyphOverflow;
bool m_forTextEmphasis;
};
}
#endif