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1 // Copyright 2014 PDFium Authors. All rights reserved. | 1 // Copyright 2014 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include "../../include/fxcrt/fx_ucd.h" | 7 #include "../../include/fxcrt/fx_ucd.h" |
8 #include "fx_arabic.h" | 8 #include "fx_arabic.h" |
9 | 9 |
10 extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536]; | 10 extern const FX_DWORD gs_FX_TextLayout_CodeProperties[65536]; |
11 IFX_BidiChar* IFX_BidiChar::Create() | 11 IFX_BidiChar* IFX_BidiChar::Create() { |
12 { | 12 return new CFX_BidiChar; |
13 return new CFX_BidiChar; | |
14 } | 13 } |
15 CFX_BidiChar::CFX_BidiChar() | 14 CFX_BidiChar::CFX_BidiChar() |
16 : m_bSeparateNeutral(TRUE) | 15 : m_bSeparateNeutral(TRUE), |
17 , m_iCurStart(0) | 16 m_iCurStart(0), |
18 , m_iCurCount(0) | 17 m_iCurCount(0), |
19 , m_iCurBidi(0) | 18 m_iCurBidi(0), |
20 , m_iLastBidi(0) | 19 m_iLastBidi(0), |
21 , m_iLastStart(0) | 20 m_iLastStart(0), |
22 , m_iLastCount(0) | 21 m_iLastCount(0) {} |
23 { | 22 void CFX_BidiChar::SetPolicy(FX_BOOL bSeparateNeutral) { |
24 } | 23 m_bSeparateNeutral = bSeparateNeutral; |
25 void CFX_BidiChar::SetPolicy(FX_BOOL bSeparateNeutral) | |
26 { | |
27 m_bSeparateNeutral = bSeparateNeutral; | |
28 } | 24 } |
29 | 25 |
30 FX_BOOL CFX_BidiChar::AppendChar(FX_WCHAR wch) | 26 FX_BOOL CFX_BidiChar::AppendChar(FX_WCHAR wch) { |
31 { | 27 FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch]; |
32 FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch]; | 28 int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS; |
33 int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS; | 29 int32_t iContext = 0; |
34 int32_t iContext = 0; | 30 switch (iBidiCls) { |
35 switch (iBidiCls) { | 31 case FX_BIDICLASS_L: |
36 case FX_BIDICLASS_L: | 32 case FX_BIDICLASS_AN: |
37 case FX_BIDICLASS_AN: | 33 case FX_BIDICLASS_EN: |
38 case FX_BIDICLASS_EN: | 34 iContext = 1; |
39 iContext = 1; | 35 break; |
40 break; | 36 case FX_BIDICLASS_R: |
41 case FX_BIDICLASS_R: | 37 case FX_BIDICLASS_AL: |
42 case FX_BIDICLASS_AL: | 38 iContext = 2; |
43 iContext = 2; | 39 break; |
44 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 } |
45 } | 51 } |
46 FX_BOOL bRet = FALSE; | 52 if (bRet) { |
47 if (iContext != m_iCurBidi) { | 53 m_iLastBidi = m_iCurBidi; |
48 if (m_bSeparateNeutral) { | 54 m_iLastStart = m_iCurStart; |
49 bRet = TRUE; | 55 m_iCurStart = m_iCurCount; |
50 } else { | 56 m_iLastCount = m_iCurCount - m_iLastStart; |
51 if (m_iCurBidi == 0) { | |
52 bRet = (m_iCurCount > 0); | |
53 } else { | |
54 bRet = (iContext != 0); | |
55 } | |
56 } | |
57 if (bRet) { | |
58 m_iLastBidi = m_iCurBidi; | |
59 m_iLastStart = m_iCurStart; | |
60 m_iCurStart = m_iCurCount; | |
61 m_iLastCount = m_iCurCount - m_iLastStart; | |
62 } | |
63 if (m_bSeparateNeutral || iContext != 0) { | |
64 m_iCurBidi = iContext; | |
65 } | |
66 } | 57 } |
67 m_iCurCount ++; | 58 if (m_bSeparateNeutral || iContext != 0) { |
68 return bRet; | 59 m_iCurBidi = iContext; |
| 60 } |
| 61 } |
| 62 m_iCurCount++; |
| 63 return bRet; |
69 } | 64 } |
70 FX_BOOL CFX_BidiChar::EndChar() | 65 FX_BOOL CFX_BidiChar::EndChar() { |
71 { | 66 m_iLastBidi = m_iCurBidi; |
72 m_iLastBidi = m_iCurBidi; | 67 m_iLastStart = m_iCurStart; |
73 m_iLastStart = m_iCurStart; | 68 m_iCurStart = m_iCurCount; |
74 m_iCurStart = m_iCurCount; | 69 m_iLastCount = m_iCurCount - m_iLastStart; |
75 m_iLastCount = m_iCurCount - m_iLastStart; | 70 return m_iLastCount > 0; |
76 return m_iLastCount > 0; | |
77 } | 71 } |
78 int32_t CFX_BidiChar::GetBidiInfo(int32_t &iStart, int32_t &iCount) | 72 int32_t CFX_BidiChar::GetBidiInfo(int32_t& iStart, int32_t& iCount) { |
79 { | 73 iStart = m_iLastStart; |
80 iStart = m_iLastStart; | 74 iCount = m_iLastCount; |
81 iCount = m_iLastCount; | 75 return m_iLastBidi; |
82 return m_iLastBidi; | |
83 } | 76 } |
84 void CFX_BidiChar::Reset() | 77 void CFX_BidiChar::Reset() { |
85 { | 78 m_iCurStart = 0; |
86 m_iCurStart = 0; | 79 m_iCurCount = 0; |
87 m_iCurCount = 0; | 80 m_iCurBidi = 0; |
88 m_iCurBidi = 0; | 81 m_iLastBidi = 0; |
89 m_iLastBidi = 0; | 82 m_iLastStart = 0; |
90 m_iLastStart = 0; | 83 m_iLastCount = 0; |
91 m_iLastCount = 0; | |
92 } | 84 } |
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