| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #ifndef CORE_FXCRT_FX_ARABIC_H_ |
| #define CORE_FXCRT_FX_ARABIC_H_ |
| |
| #include <vector> |
| |
| #include "core/fxcrt/fx_system.h" |
| #include "core/fxcrt/fx_ucd.h" |
| |
| #define FX_BIDIMAXLEVEL 61 |
| #define FX_BidiDirection(a) (FX_IsOdd(a) ? FX_BIDICLASS_R : FX_BIDICLASS_L) |
| #define FX_BidiGetDeferredType(a) (((a) >> 4) & 0x0F) |
| #define FX_BidiGetResolvedType(a) ((a)&0x0F) |
| |
| namespace pdfium { |
| namespace arabic { |
| |
| FX_WCHAR GetFormChar(FX_WCHAR wch, FX_WCHAR prev, FX_WCHAR next); |
| FX_WCHAR GetFormChar(const CFX_Char* cur, |
| const CFX_Char* prev, |
| const CFX_Char* next); |
| |
| } // namespace arabic |
| } // namespace pdfium |
| |
| void FX_BidiReverseString(CFX_WideString& wsText, |
| int32_t iStart, |
| int32_t iCount); |
| void FX_BidiSetDeferredRun(CFX_ArrayTemplate<int32_t>& values, |
| int32_t iStart, |
| int32_t iCount, |
| int32_t iValue); |
| void FX_BidiClassify(const CFX_WideString& wsText, |
| CFX_ArrayTemplate<int32_t>& classes, |
| bool bWS = false); |
| int32_t FX_BidiResolveExplicit(int32_t iBaseLevel, |
| int32_t iDirection, |
| CFX_ArrayTemplate<int32_t>& classes, |
| CFX_ArrayTemplate<int32_t>& levels, |
| int32_t iStart, |
| int32_t iCount, |
| int32_t iNest = 0); |
| |
| enum FX_BIDIWEAKSTATE { |
| FX_BWSxa = 0, |
| FX_BWSxr, |
| FX_BWSxl, |
| FX_BWSao, |
| FX_BWSro, |
| FX_BWSlo, |
| FX_BWSrt, |
| FX_BWSlt, |
| FX_BWScn, |
| FX_BWSra, |
| FX_BWSre, |
| FX_BWSla, |
| FX_BWSle, |
| FX_BWSac, |
| FX_BWSrc, |
| FX_BWSrs, |
| FX_BWSlc, |
| FX_BWSls, |
| FX_BWSret, |
| FX_BWSlet |
| }; |
| |
| enum FX_BIDIWEAKACTION { |
| FX_BIDIWEAKACTION_IX = 0x100, |
| FX_BIDIWEAKACTION_XX = 0x0F, |
| FX_BIDIWEAKACTION_xxx = (0x0F << 4) + 0x0F, |
| FX_BIDIWEAKACTION_xIx = 0x100 + FX_BIDIWEAKACTION_xxx, |
| FX_BIDIWEAKACTION_xxN = (0x0F << 4) + FX_BIDICLASS_ON, |
| FX_BIDIWEAKACTION_xxE = (0x0F << 4) + FX_BIDICLASS_EN, |
| FX_BIDIWEAKACTION_xxA = (0x0F << 4) + FX_BIDICLASS_AN, |
| FX_BIDIWEAKACTION_xxR = (0x0F << 4) + FX_BIDICLASS_R, |
| FX_BIDIWEAKACTION_xxL = (0x0F << 4) + FX_BIDICLASS_L, |
| FX_BIDIWEAKACTION_Nxx = (FX_BIDICLASS_ON << 4) + 0x0F, |
| FX_BIDIWEAKACTION_Axx = (FX_BIDICLASS_AN << 4) + 0x0F, |
| FX_BIDIWEAKACTION_ExE = (FX_BIDICLASS_EN << 4) + FX_BIDICLASS_EN, |
| FX_BIDIWEAKACTION_NIx = (FX_BIDICLASS_ON << 4) + 0x0F + 0x100, |
| FX_BIDIWEAKACTION_NxN = (FX_BIDICLASS_ON << 4) + FX_BIDICLASS_ON, |
| FX_BIDIWEAKACTION_NxR = (FX_BIDICLASS_ON << 4) + FX_BIDICLASS_R, |
| FX_BIDIWEAKACTION_NxE = (FX_BIDICLASS_ON << 4) + FX_BIDICLASS_EN, |
| FX_BIDIWEAKACTION_AxA = (FX_BIDICLASS_AN << 4) + FX_BIDICLASS_AN, |
| FX_BIDIWEAKACTION_NxL = (FX_BIDICLASS_ON << 4) + FX_BIDICLASS_L, |
| FX_BIDIWEAKACTION_LxL = (FX_BIDICLASS_L << 4) + FX_BIDICLASS_L, |
| FX_BIDIWEAKACTION_xIL = (0x0F << 4) + FX_BIDICLASS_L + 0x100, |
| FX_BIDIWEAKACTION_AxR = (FX_BIDICLASS_AN << 4) + FX_BIDICLASS_R, |
| FX_BIDIWEAKACTION_Lxx = (FX_BIDICLASS_L << 4) + 0x0F, |
| }; |
| #define FX_BWAIX FX_BIDIWEAKACTION_IX |
| #define FX_BWAXX FX_BIDIWEAKACTION_XX |
| #define FX_BWAxxx FX_BIDIWEAKACTION_xxx |
| #define FX_BWAxIx FX_BIDIWEAKACTION_xIx |
| #define FX_BWAxxN FX_BIDIWEAKACTION_xxN |
| #define FX_BWAxxE FX_BIDIWEAKACTION_xxE |
| #define FX_BWAxxA FX_BIDIWEAKACTION_xxA |
| #define FX_BWAxxR FX_BIDIWEAKACTION_xxR |
| #define FX_BWAxxL FX_BIDIWEAKACTION_xxL |
| #define FX_BWANxx FX_BIDIWEAKACTION_Nxx |
| #define FX_BWAAxx FX_BIDIWEAKACTION_Axx |
| #define FX_BWAExE FX_BIDIWEAKACTION_ExE |
| #define FX_BWANIx FX_BIDIWEAKACTION_NIx |
| #define FX_BWANxN FX_BIDIWEAKACTION_NxN |
| #define FX_BWANxR FX_BIDIWEAKACTION_NxR |
| #define FX_BWANxE FX_BIDIWEAKACTION_NxE |
| #define FX_BWAAxA FX_BIDIWEAKACTION_AxA |
| #define FX_BWANxL FX_BIDIWEAKACTION_NxL |
| #define FX_BWALxL FX_BIDIWEAKACTION_LxL |
| #define FX_BWAxIL FX_BIDIWEAKACTION_xIL |
| #define FX_BWAAxR FX_BIDIWEAKACTION_AxR |
| #define FX_BWALxx FX_BIDIWEAKACTION_Lxx |
| |
| void FX_BidiResolveWeak(int32_t iBaseLevel, |
| CFX_ArrayTemplate<int32_t>& classes, |
| CFX_ArrayTemplate<int32_t>& levels); |
| enum FX_BIDINEUTRALSTATE { |
| FX_BNSr = 0, |
| FX_BNSl, |
| FX_BNSrn, |
| FX_BNSln, |
| FX_BNSa, |
| FX_BNSna |
| }; |
| |
| enum FX_BIDINEUTRALACTION { |
| FX_BIDINEUTRALACTION_nL = FX_BIDICLASS_L, |
| FX_BIDINEUTRALACTION_En = (FX_BIDICLASS_AN << 4), |
| FX_BIDINEUTRALACTION_Rn = (FX_BIDICLASS_R << 4), |
| FX_BIDINEUTRALACTION_Ln = (FX_BIDICLASS_L << 4), |
| FX_BIDINEUTRALACTION_In = FX_BIDIWEAKACTION_IX, |
| FX_BIDINEUTRALACTION_LnL = (FX_BIDICLASS_L << 4) + FX_BIDICLASS_L, |
| }; |
| #define FX_BNAnL FX_BIDINEUTRALACTION_nL |
| #define FX_BNAEn FX_BIDINEUTRALACTION_En |
| #define FX_BNARn FX_BIDINEUTRALACTION_Rn |
| #define FX_BNALn FX_BIDINEUTRALACTION_Ln |
| #define FX_BNAIn FX_BIDINEUTRALACTION_In |
| #define FX_BNALnL FX_BIDINEUTRALACTION_LnL |
| |
| struct FX_ARBFORMTABLE { |
| uint16_t wIsolated; |
| uint16_t wFinal; |
| uint16_t wInitial; |
| uint16_t wMedial; |
| }; |
| |
| struct FX_ARAALEF { |
| uint16_t wAlef; |
| uint16_t wIsolated; |
| }; |
| |
| struct FX_ARASHADDA { |
| uint16_t wShadda; |
| uint16_t wIsolated; |
| }; |
| |
| const FX_ARBFORMTABLE* FX_GetArabicFormTable(FX_WCHAR unicode); |
| FX_WCHAR FX_GetArabicFromAlefTable(FX_WCHAR alef); |
| FX_WCHAR FX_GetArabicFromShaddaTable(FX_WCHAR shadda); |
| |
| void FX_BidiLine(std::vector<CFX_TxtChar>& chars, |
| int32_t iCount, |
| int32_t iBaseLevel = 0); |
| void FX_BidiLine(std::vector<CFX_RTFChar>& chars, |
| int32_t iCount, |
| int32_t iBaseLevel = 0); |
| |
| int32_t FX_BidiGetDeferredNeutrals(int32_t iAction, int32_t iLevel); |
| int32_t FX_BidiGetResolvedNeutrals(int32_t iAction); |
| void FX_BidiResolveNeutrals(int32_t iBaseLevel, |
| CFX_ArrayTemplate<int32_t>& classes, |
| const CFX_ArrayTemplate<int32_t>& levels); |
| void FX_BidiResolveImplicit(const CFX_ArrayTemplate<int32_t>& classes, |
| CFX_ArrayTemplate<int32_t>& levels); |
| void FX_BidiResolveWhitespace(int32_t iBaseLevel, |
| const CFX_ArrayTemplate<int32_t>& classes, |
| CFX_ArrayTemplate<int32_t>& levels); |
| int32_t FX_BidiReorderLevel(int32_t iBaseLevel, |
| CFX_WideString& wsText, |
| const CFX_ArrayTemplate<int32_t>& levels, |
| int32_t iStart, |
| bool bReverse = false); |
| void FX_BidiReorder(int32_t iBaseLevel, |
| CFX_WideString& wsText, |
| const CFX_ArrayTemplate<int32_t>& levels); |
| |
| #endif // CORE_FXCRT_FX_ARABIC_H_ |
