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/*

 * %W% %E%

 *

 * (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved

 *

 */

 

#ifndef __GLYPHITERATOR_H

#define __GLYPHITERATOR_H

 

#include "LETypes.h"

#include "OpenTypeTables.h"

#include "GlyphDefinitionTables.h"

#include "GlyphPositionAdjustments.h"

 

U_NAMESPACE_BEGIN

 

class GlyphIterator

{

public:

    GlyphIterator(LEGlyphID *theGlyphs, GlyphPositionAdjustment *theGlyphPositionAdjustments, le_int32 theGlyphCount,

        le_bool rightToLeft, le_uint16 theLookupFlags, LETag theFeatureTag, const LETag *theGlyphTags[],

        const GlyphDefinitionTableHeader *theGlyphDefinitionTableHeader);

 

    GlyphIterator(GlyphIterator &that);

 

    GlyphIterator(GlyphIterator &that, le_uint16 newLookupFlags);

 

    ~GlyphIterator();

 

    le_bool next(le_uint32 delta = 1);

    le_bool prev(le_uint32 delta = 1);

    le_bool findFeatureTag();

 

    le_bool isRightToLeft() const;

    le_bool ignoresMarks() const;

 

    LEGlyphID getCurrGlyphID() const;

    le_int32  getCurrStreamPosition() const;

    void   getCurrGlyphPositionAdjustment(GlyphPositionAdjustment& adjustment) const;

 

    le_int32  getMarkComponent(le_int32 markPosition) const;

 

    void setCurrGlyphID(LEGlyphID glyphID);

    void setCurrStreamPosition(le_int32 position);

    void setCurrGlyphPositionAdjustment(const GlyphPositionAdjustment *adjustment);

    void adjustCurrGlyphPositionAdjustment(float xPlacmentAdjust, float yPlacementAdjust,

                                           float xAdvanceAdjust, float yAdvanceAdjust);

 

private:

    GlyphIterator();

    le_bool filterGlyph(le_uint32 index) const;

    le_bool hasFeatureTag() const;

    le_bool nextInternal(le_uint32 delta = 1);

    le_bool prevInternal(le_uint32 delta = 1);

 

    le_int32  direction;

    le_int32  position;

    le_int32  nextLimit;

    le_int32  prevLimit;

    LEGlyphID *glyphs;

    GlyphPositionAdjustment *glyphPositionAdjustments;

    le_uint16 lookupFlags;

    LETag    featureTag;

    const LETag **glyphTags;

    const GlyphClassDefinitionTable *glyphClassDefinitionTable;

    const MarkAttachClassDefinitionTable *markAttachClassDefinitionTable;

};

 

U_NAMESPACE_END

#endif