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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 { |
13 return new CFX_BidiChar; | 13 return new CFX_BidiChar; |
14 } | 14 } |
15 CFX_BidiChar::CFX_BidiChar() | 15 CFX_BidiChar::CFX_BidiChar() |
16 : m_bSeparateNeutral(true) | 16 : m_bSeparateNeutral(TRUE) |
17 , m_iCurStart(0) | 17 , m_iCurStart(0) |
18 , m_iCurCount(0) | 18 , m_iCurCount(0) |
19 , m_iCurBidi(0) | 19 , m_iCurBidi(0) |
20 , m_iLastBidi(0) | 20 , m_iLastBidi(0) |
21 , m_iLastStart(0) | 21 , m_iLastStart(0) |
22 , m_iLastCount(0) | 22 , m_iLastCount(0) |
23 { | 23 { |
24 } | 24 } |
25 void CFX_BidiChar::SetPolicy(bool bSeparateNeutral) | 25 void CFX_BidiChar::SetPolicy(FX_BOOL bSeparateNeutral) |
26 { | 26 { |
27 m_bSeparateNeutral = bSeparateNeutral; | 27 m_bSeparateNeutral = bSeparateNeutral; |
28 } | 28 } |
29 | 29 |
30 bool CFX_BidiChar::AppendChar(FX_WCHAR wch) | 30 FX_BOOL CFX_BidiChar::AppendChar(FX_WCHAR wch) |
31 { | 31 { |
32 FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch]; | 32 FX_DWORD dwProps = gs_FX_TextLayout_CodeProperties[(FX_WORD)wch]; |
33 int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS; | 33 int32_t iBidiCls = (dwProps & FX_BIDICLASSBITSMASK) >> FX_BIDICLASSBITS; |
34 int32_t iContext = 0; | 34 int32_t iContext = 0; |
35 switch (iBidiCls) { | 35 switch (iBidiCls) { |
36 case FX_BIDICLASS_L: | 36 case FX_BIDICLASS_L: |
37 case FX_BIDICLASS_AN: | 37 case FX_BIDICLASS_AN: |
38 case FX_BIDICLASS_EN: | 38 case FX_BIDICLASS_EN: |
39 iContext = 1; | 39 iContext = 1; |
40 break; | 40 break; |
41 case FX_BIDICLASS_R: | 41 case FX_BIDICLASS_R: |
42 case FX_BIDICLASS_AL: | 42 case FX_BIDICLASS_AL: |
43 iContext = 2; | 43 iContext = 2; |
44 break; | 44 break; |
45 } | 45 } |
46 bool bRet = false; | 46 FX_BOOL bRet = FALSE; |
47 if (iContext != m_iCurBidi) { | 47 if (iContext != m_iCurBidi) { |
48 if (m_bSeparateNeutral) { | 48 if (m_bSeparateNeutral) { |
49 bRet = true; | 49 bRet = TRUE; |
50 } else { | 50 } else { |
51 if (m_iCurBidi == 0) { | 51 if (m_iCurBidi == 0) { |
52 bRet = (m_iCurCount > 0); | 52 bRet = (m_iCurCount > 0); |
53 } else { | 53 } else { |
54 bRet = (iContext != 0); | 54 bRet = (iContext != 0); |
55 } | 55 } |
56 } | 56 } |
57 if (bRet) { | 57 if (bRet) { |
58 m_iLastBidi = m_iCurBidi; | 58 m_iLastBidi = m_iCurBidi; |
59 m_iLastStart = m_iCurStart; | 59 m_iLastStart = m_iCurStart; |
60 m_iCurStart = m_iCurCount; | 60 m_iCurStart = m_iCurCount; |
61 m_iLastCount = m_iCurCount - m_iLastStart; | 61 m_iLastCount = m_iCurCount - m_iLastStart; |
62 } | 62 } |
63 if (m_bSeparateNeutral || iContext != 0) { | 63 if (m_bSeparateNeutral || iContext != 0) { |
64 m_iCurBidi = iContext; | 64 m_iCurBidi = iContext; |
65 } | 65 } |
66 } | 66 } |
67 m_iCurCount ++; | 67 m_iCurCount ++; |
68 return bRet; | 68 return bRet; |
69 } | 69 } |
70 bool CFX_BidiChar::EndChar() | 70 FX_BOOL CFX_BidiChar::EndChar() |
71 { | 71 { |
72 m_iLastBidi = m_iCurBidi; | 72 m_iLastBidi = m_iCurBidi; |
73 m_iLastStart = m_iCurStart; | 73 m_iLastStart = m_iCurStart; |
74 m_iCurStart = m_iCurCount; | 74 m_iCurStart = m_iCurCount; |
75 m_iLastCount = m_iCurCount - m_iLastStart; | 75 m_iLastCount = m_iCurCount - m_iLastStart; |
76 return m_iLastCount > 0; | 76 return m_iLastCount > 0; |
77 } | 77 } |
78 int32_t CFX_BidiChar::GetBidiInfo(int32_t &iStart, int32_t &iCount) | 78 int32_t CFX_BidiChar::GetBidiInfo(int32_t &iStart, int32_t &iCount) |
79 { | 79 { |
80 iStart = m_iLastStart; | 80 iStart = m_iLastStart; |
81 iCount = m_iLastCount; | 81 iCount = m_iLastCount; |
82 return m_iLastBidi; | 82 return m_iLastBidi; |
83 } | 83 } |
84 void CFX_BidiChar::Reset() | 84 void CFX_BidiChar::Reset() |
85 { | 85 { |
86 m_iCurStart = 0; | 86 m_iCurStart = 0; |
87 m_iCurCount = 0; | 87 m_iCurCount = 0; |
88 m_iCurBidi = 0; | 88 m_iCurBidi = 0; |
89 m_iLastBidi = 0; | 89 m_iLastBidi = 0; |
90 m_iLastStart = 0; | 90 m_iLastStart = 0; |
91 m_iLastCount = 0; | 91 m_iLastCount = 0; |
92 } | 92 } |
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