sl@0: /*
sl@0:  *
sl@0:  * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #ifndef __GLYPHITERATOR_H
sl@0: #define __GLYPHITERATOR_H
sl@0: 
sl@0: /**
sl@0:  * \file
sl@0:  * \internal
sl@0:  */
sl@0: 
sl@0: #include "LETypes.h"
sl@0: #include "OpenTypeTables.h"
sl@0: #include "GlyphDefinitionTables.h"
sl@0: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: class LEGlyphStorage;
sl@0: class GlyphPositionAdjustments;
sl@0: 
sl@0: class GlyphIterator : public UMemory {
sl@0: public:
sl@0:     GlyphIterator(LEGlyphStorage &theGlyphStorage, GlyphPositionAdjustments *theGlyphPositionAdjustments, le_bool rightToLeft, le_uint16 theLookupFlags, LETag theFeatureTag,
sl@0:         const GlyphDefinitionTableHeader *theGlyphDefinitionTableHeader);
sl@0: 
sl@0:     GlyphIterator(GlyphIterator &that);
sl@0: 
sl@0:     GlyphIterator(GlyphIterator &that, LETag newFeatureTag);
sl@0: 
sl@0:     GlyphIterator(GlyphIterator &that, le_uint16 newLookupFlags);
sl@0: 
sl@0:     virtual ~GlyphIterator();
sl@0: 
sl@0:     void reset(le_uint16 newLookupFlags, LETag newFeatureTag);
sl@0: 
sl@0:     le_bool next(le_uint32 delta = 1);
sl@0:     le_bool prev(le_uint32 delta = 1);
sl@0:     le_bool findFeatureTag();
sl@0: 
sl@0:     le_bool isRightToLeft() const;
sl@0:     le_bool ignoresMarks() const;
sl@0: 
sl@0:     le_bool baselineIsLogicalEnd() const;
sl@0: 
sl@0:     LEGlyphID getCurrGlyphID() const;
sl@0:     le_int32  getCurrStreamPosition() const;
sl@0: 
sl@0:     le_int32  getMarkComponent(le_int32 markPosition) const;
sl@0:     le_bool   findMark2Glyph();
sl@0: 
sl@0:     void getCursiveEntryPoint(LEPoint &entryPoint) const;
sl@0:     void getCursiveExitPoint(LEPoint &exitPoint) const;
sl@0: 
sl@0:     void setCurrGlyphID(TTGlyphID glyphID);
sl@0:     void setCurrStreamPosition(le_int32 position);
sl@0:     void setCurrGlyphBaseOffset(le_int32 baseOffset);
sl@0:     void adjustCurrGlyphPositionAdjustment(float xPlacementAdjust, float yPlacementAdjust,
sl@0:                                            float xAdvanceAdjust,   float yAdvanceAdjust);
sl@0: 
sl@0:     void setCurrGlyphPositionAdjustment(float xPlacementAdjust, float yPlacementAdjust,
sl@0:                                         float xAdvanceAdjust,   float yAdvanceAdjust);
sl@0: 
sl@0:     void setCursiveEntryPoint(LEPoint &entryPoint);
sl@0:     void setCursiveExitPoint(LEPoint &exitPoint);
sl@0:     void setCursiveGlyph();
sl@0: 
sl@0:     LEGlyphID *insertGlyphs(le_int32 count, LEErrorCode& success);
sl@0:     le_int32 applyInsertions();
sl@0: 
sl@0: private:
sl@0:     le_bool filterGlyph(le_uint32 index) const;
sl@0:     le_bool hasFeatureTag() const;
sl@0:     le_bool nextInternal(le_uint32 delta = 1);
sl@0:     le_bool prevInternal(le_uint32 delta = 1);
sl@0: 
sl@0:     le_int32  direction;
sl@0:     le_int32  position;
sl@0:     le_int32  nextLimit;
sl@0:     le_int32  prevLimit;
sl@0: 
sl@0:     LEGlyphStorage &glyphStorage;
sl@0:     GlyphPositionAdjustments *glyphPositionAdjustments;
sl@0:     le_int32 srcIndex;
sl@0:     le_int32 destIndex;
sl@0:     le_uint16 lookupFlags;
sl@0:     LETag    featureTag;
sl@0:     const GlyphClassDefinitionTable *glyphClassDefinitionTable;
sl@0:     const MarkAttachClassDefinitionTable *markAttachClassDefinitionTable;
sl@0: 
sl@0:     GlyphIterator &operator=(const GlyphIterator &other); // forbid copying of this class
sl@0: };
sl@0: 
sl@0: U_NAMESPACE_END
sl@0: #endif