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| 1 // Copyright 2014 PDFium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
| 6 | |
| 7 #include "../../include/fxcrt/fx_ucd.h" | |
| 8 #include "fx_arabic.h" | |
| 9 | |
| 10 extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536]; | |
| 11 IFX_BidiChar* IFX_BidiChar::Create() { | |
| 12 return new CFX_BidiChar; | |
| 13 } | |
| 14 CFX_BidiChar::CFX_BidiChar() | |
| 15 : m_bSeparateNeutral(TRUE), | |
| 16 m_iCurStart(0), | |
| 17 m_iCurCount(0), | |
| 18 m_iCurBidi(0), | |
| 19 m_iLastBidi(0), | |
| 20 m_iLastStart(0), | |
| 21 m_iLastCount(0) {} | |
| 22 void CFX_BidiChar::SetPolicy(FX_BOOL bSeparateNeutral) { | |
| 23 m_bSeparateNeutral = bSeparateNeutral; | |
| 24 } | |
| 25 | |
| 26 FX_BOOL CFX_BidiChar::AppendChar(FX_WCHAR wch) { | |
| 27 FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch]; | |
| 28 int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS; | |
| 29 int32_t iContext = 0; | |
| 30 switch (iBidiCls) { | |
| 31 case FX_BIDICLASS_L: | |
| 32 case FX_BIDICLASS_AN: | |
| 33 case FX_BIDICLASS_EN: | |
| 34 iContext = 1; | |
| 35 break; | |
| 36 case FX_BIDICLASS_R: | |
| 37 case FX_BIDICLASS_AL: | |
| 38 iContext = 2; | |
| 39 break; | |
| 40 } | |
| 41 FX_BOOL bRet = FALSE; | |
| 42 if (iContext != m_iCurBidi) { | |
| 43 if (m_bSeparateNeutral) { | |
| 44 bRet = TRUE; | |
| 45 } else { | |
| 46 if (m_iCurBidi == 0) { | |
| 47 bRet = (m_iCurCount > 0); | |
| 48 } else { | |
| 49 bRet = (iContext != 0); | |
| 50 } | |
| 51 } | |
| 52 if (bRet) { | |
| 53 m_iLastBidi = m_iCurBidi; | |
| 54 m_iLastStart = m_iCurStart; | |
| 55 m_iCurStart = m_iCurCount; | |
| 56 m_iLastCount = m_iCurCount - m_iLastStart; | |
| 57 } | |
| 58 if (m_bSeparateNeutral || iContext != 0) { | |
| 59 m_iCurBidi = iContext; | |
| 60 } | |
| 61 } | |
| 62 m_iCurCount++; | |
| 63 return bRet; | |
| 64 } | |
| 65 FX_BOOL CFX_BidiChar::EndChar() { | |
| 66 m_iLastBidi = m_iCurBidi; | |
| 67 m_iLastStart = m_iCurStart; | |
| 68 m_iCurStart = m_iCurCount; | |
| 69 m_iLastCount = m_iCurCount - m_iLastStart; | |
| 70 return m_iLastCount > 0; | |
| 71 } | |
| 72 int32_t CFX_BidiChar::GetBidiInfo(int32_t& iStart, int32_t& iCount) { | |
| 73 iStart = m_iLastStart; | |
| 74 iCount = m_iLastCount; | |
| 75 return m_iLastBidi; | |
| 76 } | |
| 77 void CFX_BidiChar::Reset() { | |
| 78 m_iCurStart = 0; | |
| 79 m_iCurCount = 0; | |
| 80 m_iCurBidi = 0; | |
| 81 m_iLastBidi = 0; | |
| 82 m_iLastStart = 0; | |
| 83 m_iLastCount = 0; | |
| 84 } | |
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Chromium Code Reviews
Issue 1197643002:
Cleanup IFX_BidiChar (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master