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Diffstat (limited to 'core/fxcrt/fx_arabic.h')
| -rw-r--r-- | core/fxcrt/fx_arabic.h | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/core/fxcrt/fx_arabic.h b/core/fxcrt/fx_arabic.h new file mode 100644 index 0000000000..e20a261b00 --- /dev/null +++ b/core/fxcrt/fx_arabic.h @@ -0,0 +1,188 @@ +// 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 "core/fxcrt/fx_arb.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 { + +bool IsArabicChar(FX_WCHAR wch); +bool IsArabicFormChar(FX_WCHAR wch); +FX_WCHAR GetFormChar(FX_WCHAR wch, FX_WCHAR prev = 0, FX_WCHAR next = 0); +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_Int32Array& values, + int32_t iStart, + int32_t iCount, + int32_t iValue); +void FX_BidiClassify(const CFX_WideString& wsText, + CFX_Int32Array& classes, + FX_BOOL bWS = FALSE); +int32_t FX_BidiResolveExplicit(int32_t iBaseLevel, + int32_t iDirection, + CFX_Int32Array& classes, + CFX_Int32Array& levels, + int32_t iStart, + int32_t iCount, + int32_t iNest = 0); + +enum FX_BIDIWEAKSTATE { + FX_BIDIWEAKSTATE_xa = 0, + FX_BIDIWEAKSTATE_xr, + FX_BIDIWEAKSTATE_xl, + FX_BIDIWEAKSTATE_ao, + FX_BIDIWEAKSTATE_ro, + FX_BIDIWEAKSTATE_lo, + FX_BIDIWEAKSTATE_rt, + FX_BIDIWEAKSTATE_lt, + FX_BIDIWEAKSTATE_cn, + FX_BIDIWEAKSTATE_ra, + FX_BIDIWEAKSTATE_re, + FX_BIDIWEAKSTATE_la, + FX_BIDIWEAKSTATE_le, + FX_BIDIWEAKSTATE_ac, + FX_BIDIWEAKSTATE_rc, + FX_BIDIWEAKSTATE_rs, + FX_BIDIWEAKSTATE_lc, + FX_BIDIWEAKSTATE_ls, + FX_BIDIWEAKSTATE_ret, + FX_BIDIWEAKSTATE_let, +}; +#define FX_BWSxa FX_BIDIWEAKSTATE_xa +#define FX_BWSxr FX_BIDIWEAKSTATE_xr +#define FX_BWSxl FX_BIDIWEAKSTATE_xl +#define FX_BWSao FX_BIDIWEAKSTATE_ao +#define FX_BWSro FX_BIDIWEAKSTATE_ro +#define FX_BWSlo FX_BIDIWEAKSTATE_lo +#define FX_BWSrt FX_BIDIWEAKSTATE_rt +#define FX_BWSlt FX_BIDIWEAKSTATE_lt +#define FX_BWScn FX_BIDIWEAKSTATE_cn +#define FX_BWSra FX_BIDIWEAKSTATE_ra +#define FX_BWSre FX_BIDIWEAKSTATE_re +#define FX_BWSla FX_BIDIWEAKSTATE_la +#define FX_BWSle FX_BIDIWEAKSTATE_le +#define FX_BWSac FX_BIDIWEAKSTATE_ac +#define FX_BWSrc FX_BIDIWEAKSTATE_rc +#define FX_BWSrs FX_BIDIWEAKSTATE_rs +#define FX_BWSlc FX_BIDIWEAKSTATE_lc +#define FX_BWSls FX_BIDIWEAKSTATE_ls +#define FX_BWSret FX_BIDIWEAKSTATE_ret +#define FX_BWSlet FX_BIDIWEAKSTATE_let + +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_Int32Array& classes, + CFX_Int32Array& levels); +enum FX_BIDINEUTRALSTATE { + FX_BIDINEUTRALSTATE_r = 0, + FX_BIDINEUTRALSTATE_l, + FX_BIDINEUTRALSTATE_rn, + FX_BIDINEUTRALSTATE_ln, + FX_BIDINEUTRALSTATE_a, + FX_BIDINEUTRALSTATE_na, +}; +#define FX_BNSr FX_BIDINEUTRALSTATE_r +#define FX_BNSl FX_BIDINEUTRALSTATE_l +#define FX_BNSrn FX_BIDINEUTRALSTATE_rn +#define FX_BNSln FX_BIDINEUTRALSTATE_ln +#define FX_BNSa FX_BIDINEUTRALSTATE_a +#define FX_BNSna FX_BIDINEUTRALSTATE_na +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 +int32_t FX_BidiGetDeferredNeutrals(int32_t iAction, int32_t iLevel); +int32_t FX_BidiGetResolvedNeutrals(int32_t iAction); +void FX_BidiResolveNeutrals(int32_t iBaseLevel, + CFX_Int32Array& classes, + const CFX_Int32Array& levels); +void FX_BidiResolveImplicit(const CFX_Int32Array& classes, + CFX_Int32Array& levels); +void FX_BidiResolveWhitespace(int32_t iBaseLevel, + const CFX_Int32Array& classes, + CFX_Int32Array& levels); +int32_t FX_BidiReorderLevel(int32_t iBaseLevel, + CFX_WideString& wsText, + const CFX_Int32Array& levels, + int32_t iStart, + FX_BOOL bReverse = FALSE); +void FX_BidiReorder(int32_t iBaseLevel, + CFX_WideString& wsText, + const CFX_Int32Array& levels); + +#endif // CORE_FXCRT_FX_ARABIC_H_ |