sl@0: /*
sl@0:  *
sl@0:  * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
sl@0:  *
sl@0:  */
sl@0: 
sl@0: #ifndef __ARABICSHAPING_H
sl@0: #define __ARABICSHAPING_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: 
sl@0: U_NAMESPACE_BEGIN
sl@0: 
sl@0: class LEGlyphStorage;
sl@0: 
sl@0: class ArabicShaping /* not : public UObject because all methods are static */ {
sl@0: public:
sl@0:     // shaping bit masks
sl@0:     enum ShapingBitMasks
sl@0:     {
sl@0:         MASK_SHAPE_RIGHT    = 1, // if this bit set, shapes to right
sl@0:         MASK_SHAPE_LEFT     = 2, // if this bit set, shapes to left
sl@0:         MASK_TRANSPARENT    = 4, // if this bit set, is transparent (ignore other bits)
sl@0:         MASK_NOSHAPE        = 8  // if this bit set, don't shape this char, i.e. tatweel
sl@0:     };
sl@0: 
sl@0:     // shaping values
sl@0:     enum ShapeTypeValues
sl@0:     {
sl@0:         ST_NONE         = 0,
sl@0:         ST_RIGHT        = MASK_SHAPE_RIGHT,
sl@0:         ST_LEFT         = MASK_SHAPE_LEFT,
sl@0:         ST_DUAL         = MASK_SHAPE_RIGHT | MASK_SHAPE_LEFT,
sl@0:         ST_TRANSPARENT  = MASK_TRANSPARENT,
sl@0:         ST_NOSHAPE_DUAL = MASK_NOSHAPE | ST_DUAL,
sl@0:         ST_NOSHAPE_NONE = MASK_NOSHAPE
sl@0:     };
sl@0: 
sl@0:     typedef le_int32 ShapeType;
sl@0: 
sl@0:     static void shape(const LEUnicode *chars, le_int32 offset, le_int32 charCount, le_int32 charMax,
sl@0:                       le_bool rightToLeft, LEGlyphStorage &glyphStorage);
sl@0: 
sl@0:     static const LETag *getFeatureOrder();
sl@0: 
sl@0: private:
sl@0:     // forbid instantiation
sl@0:     ArabicShaping();
sl@0: 
sl@0:     static const LETag tagArray[];
sl@0: 
sl@0:     static ShapeType getShapeType(LEUnicode c);
sl@0: 
sl@0:     static const ShapeType shapeTypes[];
sl@0: 
sl@0:     static void adjustTags(le_int32 outIndex, le_int32 shapeOffset, LEGlyphStorage &glyphStorage); 
sl@0: };
sl@0: 
sl@0: U_NAMESPACE_END
sl@0: #endif