| // 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 |
| |
| #include "core/fxcrt/fx_arabic.h" |
| |
| #include <algorithm> |
| #include <vector> |
| |
| #include "core/fxcrt/fx_memory.h" |
| #include "core/fxcrt/fx_unicode.h" |
| #include "third_party/base/stl_util.h" |
| |
| namespace { |
| |
| 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 g_FX_ArabicFormTables[] = { |
| {0xFE81, 0xFE82, 0xFE81, 0xFE82}, {0xFE83, 0xFE84, 0xFE83, 0xFE84}, |
| {0xFE85, 0xFE86, 0xFE85, 0xFE86}, {0xFE87, 0xFE88, 0xFE87, 0xFE88}, |
| {0xFE89, 0xFE8A, 0xFE8B, 0xFE8C}, {0xFE8D, 0xFE8E, 0xFE8D, 0xFE8E}, |
| {0xFE8F, 0xFE90, 0xFE91, 0xFE92}, {0xFE93, 0xFE94, 0xFE93, 0xFE94}, |
| {0xFE95, 0xFE96, 0xFE97, 0xFE98}, {0xFE99, 0xFE9A, 0xFE9B, 0xFE9C}, |
| {0xFE9D, 0xFE9E, 0xFE9F, 0xFEA0}, {0xFEA1, 0xFEA2, 0xFEA3, 0xFEA4}, |
| {0xFEA5, 0xFEA6, 0xFEA7, 0xFEA8}, {0xFEA9, 0xFEAA, 0xFEA9, 0xFEAA}, |
| {0xFEAB, 0xFEAC, 0xFEAB, 0xFEAC}, {0xFEAD, 0xFEAE, 0xFEAD, 0xFEAE}, |
| {0xFEAF, 0xFEB0, 0xFEAF, 0xFEB0}, {0xFEB1, 0xFEB2, 0xFEB3, 0xFEB4}, |
| {0xFEB5, 0xFEB6, 0xFEB7, 0xFEB8}, {0xFEB9, 0xFEBA, 0xFEBB, 0xFEBC}, |
| {0xFEBD, 0xFEBE, 0xFEBF, 0xFEC0}, {0xFEC1, 0xFEC2, 0xFEC3, 0xFEC4}, |
| {0xFEC5, 0xFEC6, 0xFEC7, 0xFEC8}, {0xFEC9, 0xFECA, 0xFECB, 0xFECC}, |
| {0xFECD, 0xFECE, 0xFECF, 0xFED0}, {0x063B, 0x063B, 0x063B, 0x063B}, |
| {0x063C, 0x063C, 0x063C, 0x063C}, {0x063D, 0x063D, 0x063D, 0x063D}, |
| {0x063E, 0x063E, 0x063E, 0x063E}, {0x063F, 0x063F, 0x063F, 0x063F}, |
| {0x0640, 0x0640, 0x0640, 0x0640}, {0xFED1, 0xFED2, 0xFED3, 0xFED4}, |
| {0xFED5, 0xFED6, 0xFED7, 0xFED8}, {0xFED9, 0xFEDA, 0xFEDB, 0xFEDC}, |
| {0xFEDD, 0xFEDE, 0xFEDF, 0xFEE0}, {0xFEE1, 0xFEE2, 0xFEE3, 0xFEE4}, |
| {0xFEE5, 0xFEE6, 0xFEE7, 0xFEE8}, {0xFEE9, 0xFEEA, 0xFEEB, 0xFEEC}, |
| {0xFEED, 0xFEEE, 0xFEED, 0xFEEE}, {0xFEEF, 0xFEF0, 0xFBFE, 0xFBFF}, |
| {0xFEF1, 0xFEF2, 0xFEF3, 0xFEF4}, {0x064B, 0x064B, 0x064B, 0x064B}, |
| {0x064C, 0x064C, 0x064C, 0x064C}, {0x064D, 0x064D, 0x064D, 0x064D}, |
| {0x064E, 0x064E, 0x064E, 0x064E}, {0x064F, 0x064F, 0x064F, 0x064F}, |
| {0x0650, 0x0650, 0x0650, 0x0650}, {0x0651, 0x0651, 0x0651, 0x0651}, |
| {0x0652, 0x0652, 0x0652, 0x0652}, {0x0653, 0x0653, 0x0653, 0x0653}, |
| {0x0654, 0x0654, 0x0654, 0x0654}, {0x0655, 0x0655, 0x0655, 0x0655}, |
| {0x0656, 0x0656, 0x0656, 0x0656}, {0x0657, 0x0657, 0x0657, 0x0657}, |
| {0x0658, 0x0658, 0x0658, 0x0658}, {0x0659, 0x0659, 0x0659, 0x0659}, |
| {0x065A, 0x065A, 0x065A, 0x065A}, {0x065B, 0x065B, 0x065B, 0x065B}, |
| {0x065C, 0x065C, 0x065C, 0x065C}, {0x065D, 0x065D, 0x065D, 0x065D}, |
| {0x065E, 0x065E, 0x065E, 0x065E}, {0x065F, 0x065F, 0x065F, 0x065F}, |
| {0x0660, 0x0660, 0x0660, 0x0660}, {0x0661, 0x0661, 0x0661, 0x0661}, |
| {0x0662, 0x0662, 0x0662, 0x0662}, {0x0663, 0x0663, 0x0663, 0x0663}, |
| {0x0664, 0x0664, 0x0664, 0x0664}, {0x0665, 0x0665, 0x0665, 0x0665}, |
| {0x0666, 0x0666, 0x0666, 0x0666}, {0x0667, 0x0667, 0x0667, 0x0667}, |
| {0x0668, 0x0668, 0x0668, 0x0668}, {0x0669, 0x0669, 0x0669, 0x0669}, |
| {0x066A, 0x066A, 0x066A, 0x066A}, {0x066B, 0x066B, 0x066B, 0x066B}, |
| {0x066C, 0x066C, 0x066C, 0x066C}, {0x066D, 0x066D, 0x066D, 0x066D}, |
| {0x066E, 0x066E, 0x066E, 0x066E}, {0x066F, 0x066F, 0x066F, 0x066F}, |
| {0x0670, 0x0670, 0x0670, 0x0670}, {0xFB50, 0xFB51, 0xFB50, 0xFB51}, |
| {0x0672, 0x0672, 0x0672, 0x0672}, {0x0673, 0x0673, 0x0673, 0x0673}, |
| {0x0674, 0x0674, 0x0674, 0x0674}, {0x0675, 0x0675, 0x0675, 0x0675}, |
| {0x0676, 0x0676, 0x0676, 0x0676}, {0x0677, 0x0677, 0x0677, 0x0677}, |
| {0x0678, 0x0678, 0x0678, 0x0678}, {0xFB66, 0xFB67, 0xFB68, 0xFB69}, |
| {0xFB5E, 0xFB5F, 0xFB60, 0xFB61}, {0xFB52, 0xFB53, 0xFB54, 0xFB55}, |
| {0x067C, 0x067C, 0x067C, 0x067C}, {0x067D, 0x067D, 0x067D, 0x067D}, |
| {0xFB56, 0xFB57, 0xFB58, 0xFB59}, {0xFB62, 0xFB63, 0xFB64, 0xFB65}, |
| {0xFB5A, 0xFB5B, 0xFB5C, 0xFB5D}, {0x0681, 0x0681, 0x0681, 0x0681}, |
| {0x0682, 0x0682, 0x0682, 0x0682}, {0xFB76, 0xFB77, 0xFB78, 0xFB79}, |
| {0xFB72, 0xFB73, 0xFB74, 0xFB75}, {0x0685, 0x0685, 0x0685, 0x0685}, |
| {0xFB7A, 0xFB7B, 0xFB7C, 0xFB7D}, {0xFB7E, 0xFB7F, 0xFB80, 0xFB81}, |
| {0xFB88, 0xFB89, 0xFB88, 0xFB89}, {0x0689, 0x0689, 0x0689, 0x0689}, |
| {0x068A, 0x068A, 0x068A, 0x068A}, {0x068B, 0x068B, 0x068B, 0x068B}, |
| {0xFB84, 0xFB85, 0xFB84, 0xFB85}, {0xFB82, 0xFB83, 0xFB82, 0xFB83}, |
| {0xFB86, 0xFB87, 0xFB86, 0xFB87}, {0x068F, 0x068F, 0x068F, 0x068F}, |
| {0x0690, 0x0690, 0x0690, 0x0690}, {0xFB8C, 0xFB8D, 0xFB8C, 0xFB8D}, |
| {0x0692, 0x0692, 0x0692, 0x0692}, {0x0693, 0x0693, 0x0693, 0x0693}, |
| {0x0694, 0x0694, 0x0694, 0x0694}, {0x0695, 0x0695, 0x0695, 0x0695}, |
| {0x0696, 0x0696, 0x0696, 0x0696}, {0x0697, 0x0697, 0x0697, 0x0697}, |
| {0xFB8A, 0xFB8B, 0xFB8A, 0xFB8B}, {0x0699, 0x0699, 0x0699, 0x0699}, |
| {0x069A, 0x069A, 0x069A, 0x069A}, {0x069B, 0x069B, 0x069B, 0x069B}, |
| {0x069C, 0x069C, 0x069C, 0x069C}, {0x069D, 0x069D, 0x069D, 0x069D}, |
| {0x069E, 0x069E, 0x069E, 0x069E}, {0x069F, 0x069F, 0x069F, 0x069F}, |
| {0x06A0, 0x06A0, 0x06A0, 0x06A0}, {0x06A1, 0x06A1, 0x06A1, 0x06A1}, |
| {0x06A2, 0x06A2, 0x06A2, 0x06A2}, {0x06A3, 0x06A3, 0x06A3, 0x06A3}, |
| {0xFB6A, 0xFB6B, 0xFB6C, 0xFB6D}, {0x06A5, 0x06A5, 0x06A5, 0x06A5}, |
| {0xFB6E, 0xFB6F, 0xFB70, 0xFB71}, {0x06A7, 0x06A7, 0x06A7, 0x06A7}, |
| {0x06A8, 0x06A8, 0x06A8, 0x06A8}, {0xFB8E, 0xFB8F, 0xFB90, 0xFB91}, |
| {0x06AA, 0x06AA, 0x06AA, 0x06AA}, {0x06AB, 0x06AB, 0x06AB, 0x06AB}, |
| {0x06AC, 0x06AC, 0x06AC, 0x06AC}, {0xFBD3, 0xFBD4, 0xFBD5, 0xFBD6}, |
| {0x06AE, 0x06AE, 0x06AE, 0x06AE}, {0xFB92, 0xFB93, 0xFB94, 0xFB95}, |
| {0x06B0, 0x06B0, 0x06B0, 0x06B0}, {0xFB9A, 0xFB9B, 0xFB9C, 0xFB9D}, |
| {0x06B2, 0x06B2, 0x06B2, 0x06B2}, {0xFB96, 0xFB97, 0xFB98, 0xFB99}, |
| {0x06B4, 0x06B4, 0x06B4, 0x06B4}, {0x06B5, 0x06B5, 0x06B5, 0x06B5}, |
| {0x06B6, 0x06B6, 0x06B6, 0x06B6}, {0x06B7, 0x06B7, 0x06B7, 0x06B7}, |
| {0x06B8, 0x06B8, 0x06B8, 0x06B8}, {0x06B9, 0x06B9, 0x06B9, 0x06B9}, |
| {0xFB9E, 0xFB9F, 0xFBE8, 0xFBE9}, {0xFBA0, 0xFBA1, 0xFBA2, 0xFBA3}, |
| {0x06BC, 0x06BC, 0x06BC, 0x06BC}, {0x06BD, 0x06BD, 0x06BD, 0x06BD}, |
| {0xFBAA, 0xFBAB, 0xFBAC, 0xFBAD}, {0x06BF, 0x06BF, 0x06BF, 0x06BF}, |
| {0xFBA4, 0xFBA5, 0xFBA4, 0xFBA5}, {0xFBA6, 0xFBA7, 0xFBA8, 0xFBA9}, |
| {0x06C2, 0x06C2, 0x06C2, 0x06C2}, {0x06C3, 0x06C3, 0x06C3, 0x06C3}, |
| {0x06C4, 0x06C4, 0x06C4, 0x06C4}, {0xFBE0, 0xFBE1, 0xFBE0, 0xFBE1}, |
| {0xFBD9, 0xFBDA, 0xFBD9, 0xFBDA}, {0xFBD7, 0xFBD8, 0xFBD7, 0xFBD8}, |
| {0xFBDB, 0xFBDC, 0xFBDB, 0xFBDC}, {0xFBE2, 0xFBE3, 0xFBE2, 0xFBE3}, |
| {0x06CA, 0x06CA, 0x06CA, 0x06CA}, {0xFBDE, 0xFBDF, 0xFBDE, 0xFBDF}, |
| {0xFBFC, 0xFBFD, 0xFBFE, 0xFBFF}, {0x06CD, 0x06CD, 0x06CD, 0x06CD}, |
| {0x06CE, 0x06CE, 0x06CE, 0x06CE}, {0x06CF, 0x06CF, 0x06CF, 0x06CF}, |
| {0xFBE4, 0xFBE5, 0xFBE6, 0xFBE7}, {0x06D1, 0x06D1, 0x06D1, 0x06D1}, |
| {0xFBAE, 0xFBAF, 0xFBAE, 0xFBAF}, {0xFBB0, 0xFBB1, 0xFBB0, 0xFBB1}, |
| {0x06D4, 0x06D4, 0x06D4, 0x06D4}, {0x06D5, 0x06D5, 0x06D5, 0x06D5}, |
| }; |
| |
| const FX_ARAALEF gs_FX_AlefTable[] = { |
| {0x0622, 0xFEF5}, |
| {0x0623, 0xFEF7}, |
| {0x0625, 0xFEF9}, |
| {0x0627, 0xFEFB}, |
| }; |
| |
| const FX_ARASHADDA gs_FX_ShaddaTable[] = { |
| {0x064C, 0xFC5E}, {0x064D, 0xFC5F}, {0x064E, 0xFC60}, |
| {0x064F, 0xFC61}, {0x0650, 0xFC62}, |
| }; |
| |
| const FX_ARBFORMTABLE* GetArabicFormTable(wchar_t unicode) { |
| if (unicode < 0x622 || unicode > 0x6d5) |
| return nullptr; |
| return g_FX_ArabicFormTables + unicode - 0x622; |
| } |
| |
| const FX_ARBFORMTABLE* ParseChar(const CFX_Char* pTC, |
| wchar_t* wChar, |
| FX_CHARTYPE* eType) { |
| if (!pTC) { |
| *eType = FX_CHARTYPE_Unknown; |
| *wChar = 0xFEFF; |
| return nullptr; |
| } |
| |
| *eType = pTC->GetCharType(); |
| *wChar = static_cast<wchar_t>(pTC->char_code()); |
| const FX_ARBFORMTABLE* pFT = GetArabicFormTable(*wChar); |
| if (!pFT || *eType >= FX_CHARTYPE_ArabicNormal) |
| *eType = FX_CHARTYPE_Unknown; |
| |
| return pFT; |
| } |
| |
| wchar_t GetArabicFromAlefTable(wchar_t alef) { |
| static const size_t s_iAlefCount = FX_ArraySize(gs_FX_AlefTable); |
| for (size_t iStart = 0; iStart < s_iAlefCount; iStart++) { |
| const FX_ARAALEF& v = gs_FX_AlefTable[iStart]; |
| if (v.wAlef == alef) |
| return v.wIsolated; |
| } |
| return alef; |
| } |
| |
| } // namespace |
| |
| namespace pdfium { |
| namespace arabic { |
| |
| wchar_t GetFormChar(wchar_t wch, wchar_t prev, wchar_t next) { |
| CFX_Char c(wch, FX_GetUnicodeProperties(wch)); |
| CFX_Char p(prev, FX_GetUnicodeProperties(prev)); |
| CFX_Char n(next, FX_GetUnicodeProperties(next)); |
| return GetFormChar(&c, &p, &n); |
| } |
| |
| wchar_t GetFormChar(const CFX_Char* cur, |
| const CFX_Char* prev, |
| const CFX_Char* next) { |
| FX_CHARTYPE eCur; |
| wchar_t wCur; |
| const FX_ARBFORMTABLE* ft = ParseChar(cur, &wCur, &eCur); |
| if (eCur < FX_CHARTYPE_ArabicAlef || eCur >= FX_CHARTYPE_ArabicNormal) |
| return wCur; |
| |
| FX_CHARTYPE ePrev; |
| wchar_t wPrev; |
| ParseChar(prev, &wPrev, &ePrev); |
| if (wPrev == 0x0644 && eCur == FX_CHARTYPE_ArabicAlef) |
| return 0xFEFF; |
| |
| FX_CHARTYPE eNext; |
| wchar_t wNext; |
| ParseChar(next, &wNext, &eNext); |
| bool bAlef = (eNext == FX_CHARTYPE_ArabicAlef && wCur == 0x644); |
| if (ePrev < FX_CHARTYPE_ArabicAlef) { |
| if (bAlef) |
| return GetArabicFromAlefTable(wNext); |
| return (eNext < FX_CHARTYPE_ArabicAlef) ? ft->wIsolated : ft->wInitial; |
| } |
| |
| if (bAlef) { |
| wCur = GetArabicFromAlefTable(wNext); |
| return (ePrev != FX_CHARTYPE_ArabicDistortion) ? wCur : ++wCur; |
| } |
| |
| if (ePrev == FX_CHARTYPE_ArabicAlef || ePrev == FX_CHARTYPE_ArabicSpecial) |
| return (eNext < FX_CHARTYPE_ArabicAlef) ? ft->wIsolated : ft->wInitial; |
| return (eNext < FX_CHARTYPE_ArabicAlef) ? ft->wFinal : ft->wMedial; |
| } |
| |
| } // namespace arabic |
| } // namespace pdfium |
| |
| wchar_t FX_GetArabicFromShaddaTable(wchar_t shadda) { |
| static const size_t s_iShaddaCount = FX_ArraySize(gs_FX_ShaddaTable); |
| for (size_t iStart = 0; iStart < s_iShaddaCount; iStart++) { |
| const FX_ARASHADDA& v = gs_FX_ShaddaTable[iStart]; |
| if (v.wShadda == shadda) |
| return v.wIsolated; |
| } |
| return shadda; |
| } |