/*

  *

  * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved

  *

  */

 #ifndef __ARABICSHAPING_H

 #define __ARABICSHAPING_H

 /**

  * \file

  * \internal

  */

 #include "LETypes.h"

 #include "OpenTypeTables.h"

 U_NAMESPACE_BEGIN

 class LEGlyphStorage;

 class ArabicShaping /* not : public UObject because all methods are static */ {

 public:

     // shaping bit masks

     enum ShapingBitMasks

     {

         MASK_SHAPE_RIGHT    = 1, // if this bit set, shapes to right

         MASK_SHAPE_LEFT     = 2, // if this bit set, shapes to left

         MASK_TRANSPARENT    = 4, // if this bit set, is transparent (ignore other bits)

         MASK_NOSHAPE        = 8  // if this bit set, don't shape this char, i.e. tatweel

     };

     // shaping values

     enum ShapeTypeValues

     {

         ST_NONE         = 0,

         ST_RIGHT        = MASK_SHAPE_RIGHT,

         ST_LEFT         = MASK_SHAPE_LEFT,

         ST_DUAL         = MASK_SHAPE_RIGHT | MASK_SHAPE_LEFT,

         ST_TRANSPARENT  = MASK_TRANSPARENT,

         ST_NOSHAPE_DUAL = MASK_NOSHAPE | ST_DUAL,

         ST_NOSHAPE_NONE = MASK_NOSHAPE

     };

     typedef le_int32 ShapeType;

     static void shape(const LEUnicode *chars, le_int32 offset, le_int32 charCount, le_int32 charMax,

                       le_bool rightToLeft, LEGlyphStorage &glyphStorage);

     static const LETag *getFeatureOrder();

 private:

     // forbid instantiation

     ArabicShaping();

     static const LETag tagArray[];

     static ShapeType getShapeType(LEUnicode c);

     static const ShapeType shapeTypes[];

     static void adjustTags(le_int32 outIndex, le_int32 shapeOffset, LEGlyphStorage &glyphStorage); 

 };

 U_NAMESPACE_END

 #endif