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/*
*
* (C) Copyright IBM Corp. 1998-2007 - 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,
FeatureMask theFeatureMask, const GlyphDefinitionTableHeader *theGlyphDefinitionTableHeader);
GlyphIterator(GlyphIterator &that);
GlyphIterator(GlyphIterator &that, FeatureMask newFeatureMask, le_int32 featureParam = 0);
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();
le_int32 getFeatureParam() const;
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 clearCursiveEntryPoint();
void clearCursiveExitPoint();
void setCursiveEntryPoint(LEPoint &entryPoint);
void setCursiveExitPoint(LEPoint &exitPoint);
void setCursiveGlyph();
LEGlyphID *insertGlyphs(le_int32 count);
le_int32 applyInsertions();
private:
le_bool filterGlyph(le_uint32 index) const;
le_bool hasFeatureTag(le_bool matchGroup); /* not const because it updates the featureParam field */
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;
FeatureMask featureMask;
le_int32 glyphGroup;
le_int32 featureParam;
const GlyphClassDefinitionTable *glyphClassDefinitionTable;
const MarkAttachClassDefinitionTable *markAttachClassDefinitionTable;
GlyphIterator &operator=(const GlyphIterator &other); // forbid copying of this class
};
U_NAMESPACE_END
#endif
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