114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
/*
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* %W% %E%
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*
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* (C) Copyright IBM Corp. 1998, 1999, 2000, 2001 - All Rights Reserved
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*
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*/
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#ifndef __GLYPHITERATOR_H
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#define __GLYPHITERATOR_H
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#include "LETypes.h"
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#include "OpenTypeTables.h"
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#include "GlyphDefinitionTables.h"
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#include "GlyphPositionAdjustments.h"
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#include "cmemory.h"
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U_NAMESPACE_BEGIN
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class GlyphIterator : public UObject {
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public:
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GlyphIterator(LEGlyphID *theGlyphs, GlyphPositionAdjustment *theGlyphPositionAdjustments, le_int32 theGlyphCount,
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le_bool rightToLeft, le_uint16 theLookupFlags, LETag theFeatureTag, const LETag *theGlyphTags[],
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const GlyphDefinitionTableHeader *theGlyphDefinitionTableHeader);
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GlyphIterator(GlyphIterator &that);
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GlyphIterator(GlyphIterator &that, le_uint16 newLookupFlags);
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~GlyphIterator();
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le_bool next(le_uint32 delta = 1);
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le_bool prev(le_uint32 delta = 1);
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le_bool findFeatureTag();
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le_bool isRightToLeft() const;
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le_bool ignoresMarks() const;
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le_bool baselineIsLogicalEnd() const;
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le_bool hasCursiveFirstExitPoint() const;
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le_bool hasCursiveLastExitPoint() const;
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LEGlyphID getCurrGlyphID() const;
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le_int32 getCurrStreamPosition() const;
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void getCurrGlyphPositionAdjustment(GlyphPositionAdjustment &adjustment) const;
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le_int32 getMarkComponent(le_int32 markPosition) const;
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le_bool findMark2Glyph();
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void getCursiveLastExitPoint(LEPoint &exitPoint) const;
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LEGlyphID getCursiveLastGlyphID() const;
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float getCursiveBaselineAdjustment() const;
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void getCursiveLastPositionAdjustment(GlyphPositionAdjustment &adjustment) const;
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void setCurrGlyphID(LEGlyphID glyphID);
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void setCurrStreamPosition(le_int32 position);
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void setCurrGlyphPositionAdjustment(const GlyphPositionAdjustment *adjustment);
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void setCurrGlyphBaseOffset(le_int32 baseOffset);
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void adjustCurrGlyphPositionAdjustment(float xPlacmentAdjust, float yPlacementAdjust,
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float xAdvanceAdjust, float yAdvanceAdjust);
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void setCursiveFirstExitPoint();
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void resetCursiveLastExitPoint();
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void setCursiveLastExitPoint(LEPoint &exitPoint);
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void setCursiveBaselineAdjustment(float adjustment);
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void adjustCursiveLastGlyphPositionAdjustment(float xPlacmentAdjust, float yPlacementAdjust,
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float xAdvanceAdjust, float yAdvanceAdjust);
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/**
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* ICU "poor man's RTTI", returns a UClassID for the actual class.
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*
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* @draft ICU 2.2
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*/
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virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
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/**
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* ICU "poor man's RTTI", returns a UClassID for this class.
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*
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* @draft ICU 2.2
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*/
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static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
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private:
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GlyphIterator();
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le_bool filterGlyph(le_uint32 index) const;
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le_bool hasFeatureTag() const;
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le_bool nextInternal(le_uint32 delta = 1);
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le_bool prevInternal(le_uint32 delta = 1);
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le_int32 direction;
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le_int32 position;
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le_int32 nextLimit;
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le_int32 prevLimit;
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le_int32 cursiveFirstPosition;
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le_int32 cursiveLastPosition;
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float cursiveBaselineAdjustment;
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LEPoint cursiveLastExitPoint;
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LEGlyphID *glyphs;
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GlyphPositionAdjustment *glyphPositionAdjustments;
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le_uint16 lookupFlags;
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LETag featureTag;
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const LETag **glyphTags;
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const GlyphClassDefinitionTable *glyphClassDefinitionTable;
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const MarkAttachClassDefinitionTable *markAttachClassDefinitionTable;
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/**
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* The address of this static class variable serves as this class's ID
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* for ICU "poor man's RTTI".
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*/
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static const char fgClassID;
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};
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U_NAMESPACE_END
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#endif
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