| /* |
| * @(#)ArabicShaping.h 1.6 00/03/15 |
| * |
| * (C) Copyright IBM Corp. 1998-2003 - All Rights Reserved |
| * |
| */ |
| |
| #ifndef __ARABICSHAPING_H |
| #define __ARABICSHAPING_H |
| |
| /** |
| * \file |
| * \internal |
| */ |
| |
| #include "LETypes.h" |
| #include "OpenTypeTables.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| class Shaper /* not : public UObject because this is an interface/mixin class */ { |
| public: |
| virtual inline ~Shaper() {}; |
| virtual void init(LEUnicode ch, le_int32 outIndex, le_bool isloate) = 0; |
| virtual void shape(le_int32 outIndex, le_int32 shapeOffset) = 0; |
| }; |
| |
| 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, Shaper &shaper); |
| |
| static const LETag *getFeatureOrder(); |
| |
| static const le_uint8 glyphSubstitutionTable[]; |
| //static le_uint8 ligatureSubstitutionSubtable[]; |
| static const le_uint8 glyphDefinitionTable[]; |
| |
| private: |
| // forbid instantiation |
| ArabicShaping(); |
| |
| static ShapeType getShapeType(LEUnicode c); |
| |
| static const ShapeType shapeTypes[]; |
| }; |
| |
| class GlyphShaper : public UMemory, public Shaper |
| { |
| public: |
| virtual void init(LEUnicode ch, le_int32 outIndex, le_bool isolate); |
| virtual void shape(le_int32 outIndex, le_int32 shapeOffset); |
| |
| GlyphShaper(const LETag **outputTags); |
| ~GlyphShaper(); |
| |
| private: |
| const LETag **charTags; |
| |
| static const LETag tagArray[]; |
| |
| GlyphShaper(const GlyphShaper &other); // forbid copying of this class |
| GlyphShaper &operator=(const GlyphShaper &other); // forbid copying of this class |
| }; |
| |
| class CharShaper : public UMemory, public Shaper |
| { |
| public: |
| virtual void init(LEUnicode ch, le_int32 outIndex, le_bool isolate); |
| virtual void shape(le_int32 outIndex, le_int32 shapeOffset); |
| |
| CharShaper(LEUnicode *outputChars); |
| ~CharShaper(); |
| |
| private: |
| LEUnicode *chars; |
| |
| static const LEUnicode isolateShapes[]; |
| |
| static LEUnicode getToIsolateShape(LEUnicode ch); |
| |
| CharShaper(const CharShaper &other); // forbid copying of this class |
| CharShaper &operator=(const CharShaper &other); // forbid copying of this class |
| }; |
| |
| U_NAMESPACE_END |
| #endif |