/*

 *

 * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved

 *

 */

#ifndef __GLYPHITERATOR_H

#define __GLYPHITERATOR_H

/**

 * \file

 * \internal

 */

#include "LETypes.h"

#include "OpenTypeTables.h"

#include "GlyphDefinitionTables.h"

U_NAMESPACE_BEGIN

class LEGlyphStorage;

class GlyphPositionAdjustments;

class GlyphIterator : public UMemory {

public:

    GlyphIterator(LEGlyphStorage &theGlyphStorage, GlyphPositionAdjustments *theGlyphPositionAdjustments, le_bool rightToLeft, le_uint16 theLookupFlags, LETag theFeatureTag,

        const GlyphDefinitionTableHeader *theGlyphDefinitionTableHeader);

    GlyphIterator(GlyphIterator &that);

    GlyphIterator(GlyphIterator &that, LETag newFeatureTag);

    GlyphIterator(GlyphIterator &that, le_uint16 newLookupFlags);

    virtual ~GlyphIterator();

    void reset(le_uint16 newLookupFlags, LETag newFeatureTag);

    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;

    le_bool baselineIsLogicalEnd() const;

    LEGlyphID getCurrGlyphID() const;

    le_int32  getCurrStreamPosition() const;

    le_int32  getMarkComponent(le_int32 markPosition) const;

    le_bool   findMark2Glyph();

    void getCursiveEntryPoint(LEPoint &entryPoint) const;

    void getCursiveExitPoint(LEPoint &exitPoint) const;

    void setCurrGlyphID(TTGlyphID glyphID);

    void setCurrStreamPosition(le_int32 position);

    void setCurrGlyphBaseOffset(le_int32 baseOffset);

    void adjustCurrGlyphPositionAdjustment(float xPlacementAdjust, float yPlacementAdjust,

                                           float xAdvanceAdjust,   float yAdvanceAdjust);

    void setCurrGlyphPositionAdjustment(float xPlacementAdjust, float yPlacementAdjust,

                                        float xAdvanceAdjust,   float yAdvanceAdjust);

    void setCursiveEntryPoint(LEPoint &entryPoint);

    void setCursiveExitPoint(LEPoint &exitPoint);

    void setCursiveGlyph();

    LEGlyphID *insertGlyphs(le_int32 count, LEErrorCode& success);

    le_int32 applyInsertions();

private:

    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;

    LEGlyphStorage &glyphStorage;

    GlyphPositionAdjustments *glyphPositionAdjustments;

    le_int32 srcIndex;

    le_int32 destIndex;

    le_uint16 lookupFlags;

    LETag    featureTag;

    const GlyphClassDefinitionTable *glyphClassDefinitionTable;

    const MarkAttachClassDefinitionTable *markAttachClassDefinitionTable;

    GlyphIterator &operator=(const GlyphIterator &other); // forbid copying of this class

};

U_NAMESPACE_END

#endif