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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 "xfa/src/fee/fx_wordbreak/fx_wordbreak_impl.h" | |
| 8 | |
| 9 FX_WordBreakProp FX_GetWordBreakProperty(FX_WCHAR wcCodePoint) { | |
| 10 FX_DWORD dwProperty = | |
| 11 (FX_DWORD)gs_FX_WordBreak_CodePointProperties[wcCodePoint >> 1]; | |
| 12 return (FX_WordBreakProp)(((wcCodePoint) & 1) ? (dwProperty & 0x0F) | |
| 13 : (dwProperty >> 4)); | |
| 14 } | |
| 15 CFX_CharIter::CFX_CharIter(const CFX_WideString& wsText) | |
| 16 : m_wsText(wsText), m_nIndex(0) { | |
| 17 FXSYS_assert(!wsText.IsEmpty()); | |
| 18 } | |
| 19 CFX_CharIter::~CFX_CharIter() {} | |
| 20 void CFX_CharIter::Release() { | |
| 21 delete this; | |
| 22 } | |
| 23 FX_BOOL CFX_CharIter::Next(FX_BOOL bPrev) { | |
| 24 if (bPrev) { | |
| 25 if (m_nIndex <= 0) { | |
| 26 return FALSE; | |
| 27 } | |
| 28 m_nIndex--; | |
| 29 } else { | |
| 30 if (m_nIndex + 1 >= m_wsText.GetLength()) { | |
| 31 return FALSE; | |
| 32 } | |
| 33 m_nIndex++; | |
| 34 } | |
| 35 return TRUE; | |
| 36 } | |
| 37 FX_WCHAR CFX_CharIter::GetChar() { | |
| 38 return m_wsText.GetAt(m_nIndex); | |
| 39 } | |
| 40 void CFX_CharIter::SetAt(int32_t nIndex) { | |
| 41 if (nIndex < 0 || nIndex >= m_wsText.GetLength()) { | |
| 42 return; | |
| 43 } | |
| 44 m_nIndex = nIndex; | |
| 45 } | |
| 46 int32_t CFX_CharIter::GetAt() const { | |
| 47 return m_nIndex; | |
| 48 } | |
| 49 FX_BOOL CFX_CharIter::IsEOF(FX_BOOL bTail) const { | |
| 50 return bTail ? (m_nIndex + 1 == m_wsText.GetLength()) : (m_nIndex == 0); | |
| 51 } | |
| 52 IFX_CharIter* CFX_CharIter::Clone() { | |
| 53 CFX_CharIter* pIter = new CFX_CharIter(m_wsText); | |
| 54 pIter->m_nIndex = m_nIndex; | |
| 55 return pIter; | |
| 56 } | |
| 57 CFX_WordBreak::CFX_WordBreak() : m_pPreIter(NULL), m_pCurIter(NULL) {} | |
| 58 CFX_WordBreak::~CFX_WordBreak() { | |
| 59 if (m_pPreIter) { | |
| 60 m_pPreIter->Release(); | |
| 61 m_pPreIter = NULL; | |
| 62 } | |
| 63 if (m_pCurIter) { | |
| 64 m_pCurIter->Release(); | |
| 65 m_pCurIter = NULL; | |
| 66 } | |
| 67 } | |
| 68 void CFX_WordBreak::Release() { | |
| 69 delete this; | |
| 70 } | |
| 71 void CFX_WordBreak::Attach(IFX_CharIter* pIter) { | |
| 72 FXSYS_assert(pIter); | |
| 73 m_pCurIter = pIter; | |
| 74 } | |
| 75 void CFX_WordBreak::Attach(const CFX_WideString& wsText) { | |
| 76 m_pCurIter = new CFX_CharIter(wsText); | |
| 77 } | |
| 78 FX_BOOL CFX_WordBreak::Next(FX_BOOL bPrev) { | |
| 79 IFX_CharIter* pIter = bPrev ? m_pPreIter->Clone() : m_pCurIter->Clone(); | |
| 80 if (pIter->IsEOF(!bPrev)) { | |
| 81 return FALSE; | |
| 82 } | |
| 83 pIter->Next(bPrev); | |
| 84 if (!FindNextBreakPos(pIter, bPrev, TRUE)) { | |
| 85 pIter->Release(); | |
| 86 return FALSE; | |
| 87 } | |
| 88 if (bPrev) { | |
| 89 m_pCurIter->Release(); | |
| 90 m_pCurIter = m_pPreIter; | |
| 91 m_pCurIter->Next(TRUE); | |
| 92 m_pPreIter = pIter; | |
| 93 } else { | |
| 94 m_pPreIter->Release(); | |
| 95 m_pPreIter = m_pCurIter; | |
| 96 m_pPreIter->Next(); | |
| 97 m_pCurIter = pIter; | |
| 98 } | |
| 99 return TRUE; | |
| 100 } | |
| 101 void CFX_WordBreak::SetAt(int32_t nIndex) { | |
| 102 if (m_pPreIter) { | |
| 103 m_pPreIter->Release(); | |
| 104 m_pPreIter = NULL; | |
| 105 } | |
| 106 m_pCurIter->SetAt(nIndex); | |
| 107 FindNextBreakPos(m_pCurIter, TRUE, FALSE); | |
| 108 m_pPreIter = m_pCurIter; | |
| 109 m_pCurIter = m_pPreIter->Clone(); | |
| 110 FindNextBreakPos(m_pCurIter, FALSE, FALSE); | |
| 111 } | |
| 112 int32_t CFX_WordBreak::GetWordPos() const { | |
| 113 return m_pPreIter->GetAt(); | |
| 114 } | |
| 115 int32_t CFX_WordBreak::GetWordLength() const { | |
| 116 return m_pCurIter->GetAt() - m_pPreIter->GetAt() + 1; | |
| 117 } | |
| 118 void CFX_WordBreak::GetWord(CFX_WideString& wsWord) const { | |
| 119 int32_t nWordLength = GetWordLength(); | |
| 120 if (nWordLength <= 0) { | |
| 121 return; | |
| 122 } | |
| 123 FX_WCHAR* lpBuf = wsWord.GetBuffer(nWordLength); | |
| 124 IFX_CharIter* pTempIter = m_pPreIter->Clone(); | |
| 125 int32_t i = 0; | |
| 126 while (pTempIter->GetAt() <= m_pCurIter->GetAt()) { | |
| 127 lpBuf[i++] = pTempIter->GetChar(); | |
| 128 FX_BOOL bEnd = pTempIter->Next(); | |
| 129 if (!bEnd) { | |
| 130 break; | |
| 131 } | |
| 132 } | |
| 133 pTempIter->Release(); | |
| 134 wsWord.ReleaseBuffer(nWordLength); | |
| 135 } | |
| 136 FX_BOOL CFX_WordBreak::IsEOF(FX_BOOL bTail) const { | |
| 137 return m_pCurIter->IsEOF(bTail); | |
| 138 } | |
| 139 FX_BOOL CFX_WordBreak::FindNextBreakPos(IFX_CharIter* pIter, | |
| 140 FX_BOOL bPrev, | |
| 141 FX_BOOL bFromNext) { | |
| 142 FX_WordBreakProp ePreType = FX_WordBreakProp_None; | |
| 143 FX_WordBreakProp eCurType = FX_WordBreakProp_None; | |
| 144 FX_WordBreakProp eNextType = FX_WordBreakProp_None; | |
| 145 if (pIter->IsEOF(!bPrev)) { | |
| 146 return TRUE; | |
| 147 } | |
| 148 if (!(bFromNext || pIter->IsEOF(bPrev))) { | |
| 149 pIter->Next(!bPrev); | |
| 150 FX_WCHAR wcTemp = pIter->GetChar(); | |
| 151 ePreType = FX_GetWordBreakProperty(wcTemp); | |
| 152 pIter->Next(bPrev); | |
| 153 } | |
| 154 FX_WCHAR wcTemp = pIter->GetChar(); | |
| 155 eCurType = FX_GetWordBreakProperty(wcTemp); | |
| 156 FX_BOOL bFirst = TRUE; | |
| 157 do { | |
| 158 pIter->Next(bPrev); | |
| 159 FX_WCHAR wcTemp = pIter->GetChar(); | |
| 160 eNextType = FX_GetWordBreakProperty(wcTemp); | |
| 161 FX_WORD wBreak = | |
| 162 gs_FX_WordBreak_Table[eCurType] & ((FX_WORD)(1 << eNextType)); | |
| 163 if (wBreak) { | |
| 164 if (pIter->IsEOF(!bPrev)) { | |
| 165 pIter->Next(!bPrev); | |
| 166 return TRUE; | |
| 167 } | |
| 168 if (bFirst) { | |
| 169 int32_t nFlags = 0; | |
| 170 if (eCurType == FX_WordBreakProp_MidLetter) { | |
| 171 if (eNextType == FX_WordBreakProp_ALetter) { | |
| 172 nFlags = 1; | |
| 173 } | |
| 174 } else if (eCurType == FX_WordBreakProp_MidNum) { | |
| 175 if (eNextType == FX_WordBreakProp_Numberic) { | |
| 176 nFlags = 2; | |
| 177 } | |
| 178 } else if (eCurType == FX_WordBreakProp_MidNumLet) { | |
| 179 if (eNextType == FX_WordBreakProp_ALetter) { | |
| 180 nFlags = 1; | |
| 181 } else if (eNextType == FX_WordBreakProp_Numberic) { | |
| 182 nFlags = 2; | |
| 183 } | |
| 184 } | |
| 185 if (nFlags > 0) { | |
| 186 FXSYS_assert(nFlags <= 2); | |
| 187 if (!((nFlags == 1 && ePreType == FX_WordBreakProp_ALetter) || | |
| 188 (nFlags == 2 && ePreType == FX_WordBreakProp_Numberic))) { | |
| 189 pIter->Next(!bPrev); | |
| 190 return TRUE; | |
| 191 } | |
| 192 pIter->Next(bPrev); | |
| 193 wBreak = FALSE; | |
| 194 } | |
| 195 bFirst = FALSE; | |
| 196 } | |
| 197 if (wBreak) { | |
| 198 int32_t nFlags = 0; | |
| 199 if (eNextType == FX_WordBreakProp_MidLetter) { | |
| 200 if (eCurType == FX_WordBreakProp_ALetter) { | |
| 201 nFlags = 1; | |
| 202 } | |
| 203 } else if (eNextType == FX_WordBreakProp_MidNum) { | |
| 204 if (eCurType == FX_WordBreakProp_Numberic) { | |
| 205 nFlags = 2; | |
| 206 } | |
| 207 } else if (eNextType == FX_WordBreakProp_MidNumLet) { | |
| 208 if (eCurType == FX_WordBreakProp_ALetter) { | |
| 209 nFlags = 1; | |
| 210 } else if (eCurType == FX_WordBreakProp_Numberic) { | |
| 211 nFlags = 2; | |
| 212 } | |
| 213 } | |
| 214 if (nFlags <= 0) { | |
| 215 pIter->Next(!bPrev); | |
| 216 return TRUE; | |
| 217 } | |
| 218 FXSYS_assert(nFlags <= 2); | |
| 219 pIter->Next(bPrev); | |
| 220 wcTemp = pIter->GetChar(); | |
| 221 eNextType = (FX_WordBreakProp)FX_GetWordBreakProperty(wcTemp); | |
| 222 if (!((nFlags == 1 && eNextType == FX_WordBreakProp_ALetter) || | |
| 223 (nFlags == 2 && eNextType == FX_WordBreakProp_Numberic))) { | |
| 224 pIter->Next(!bPrev); | |
| 225 pIter->Next(!bPrev); | |
| 226 return TRUE; | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 ePreType = eCurType; | |
| 231 eCurType = eNextType; | |
| 232 bFirst = FALSE; | |
| 233 } while (!pIter->IsEOF(!bPrev)); | |
| 234 return TRUE; | |
| 235 } | |
| 236 IFX_WordBreak* FX_WordBreak_Create() { | |
| 237 return new CFX_WordBreak; | |
| 238 } | |
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Chromium Code Reviews
Issue 1803723002:
Move xfa/src up to xfa/. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master