diff options
Diffstat (limited to 'xfa/src/fee/fx_wordbreak/fx_wordbreak_impl.cpp')
| -rw-r--r-- | xfa/src/fee/fx_wordbreak/fx_wordbreak_impl.cpp | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/xfa/src/fee/fx_wordbreak/fx_wordbreak_impl.cpp b/xfa/src/fee/fx_wordbreak/fx_wordbreak_impl.cpp new file mode 100644 index 0000000000..036b4f80fa --- /dev/null +++ b/xfa/src/fee/fx_wordbreak/fx_wordbreak_impl.cpp @@ -0,0 +1,238 @@ +// 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 "xfa/src/fee/fx_wordbreak/fx_wordbreak_impl.h" + +FX_WordBreakProp FX_GetWordBreakProperty(FX_WCHAR wcCodePoint) { + FX_DWORD dwProperty = + (FX_DWORD)gs_FX_WordBreak_CodePointProperties[wcCodePoint >> 1]; + return (FX_WordBreakProp)(((wcCodePoint) & 1) ? (dwProperty & 0x0F) + : (dwProperty >> 4)); +} +CFX_CharIter::CFX_CharIter(const CFX_WideString& wsText) + : m_wsText(wsText), m_nIndex(0) { + FXSYS_assert(!wsText.IsEmpty()); +} +CFX_CharIter::~CFX_CharIter() {} +void CFX_CharIter::Release() { + delete this; +} +FX_BOOL CFX_CharIter::Next(FX_BOOL bPrev) { + if (bPrev) { + if (m_nIndex <= 0) { + return FALSE; + } + m_nIndex--; + } else { + if (m_nIndex + 1 >= m_wsText.GetLength()) { + return FALSE; + } + m_nIndex++; + } + return TRUE; +} +FX_WCHAR CFX_CharIter::GetChar() { + return m_wsText.GetAt(m_nIndex); +} +void CFX_CharIter::SetAt(int32_t nIndex) { + if (nIndex < 0 || nIndex >= m_wsText.GetLength()) { + return; + } + m_nIndex = nIndex; +} +int32_t CFX_CharIter::GetAt() const { + return m_nIndex; +} +FX_BOOL CFX_CharIter::IsEOF(FX_BOOL bTail) const { + return bTail ? (m_nIndex + 1 == m_wsText.GetLength()) : (m_nIndex == 0); +} +IFX_CharIter* CFX_CharIter::Clone() { + CFX_CharIter* pIter = new CFX_CharIter(m_wsText); + pIter->m_nIndex = m_nIndex; + return pIter; +} +CFX_WordBreak::CFX_WordBreak() : m_pPreIter(NULL), m_pCurIter(NULL) {} +CFX_WordBreak::~CFX_WordBreak() { + if (m_pPreIter) { + m_pPreIter->Release(); + m_pPreIter = NULL; + } + if (m_pCurIter) { + m_pCurIter->Release(); + m_pCurIter = NULL; + } +} +void CFX_WordBreak::Release() { + delete this; +} +void CFX_WordBreak::Attach(IFX_CharIter* pIter) { + FXSYS_assert(pIter); + m_pCurIter = pIter; +} +void CFX_WordBreak::Attach(const CFX_WideString& wsText) { + m_pCurIter = new CFX_CharIter(wsText); +} +FX_BOOL CFX_WordBreak::Next(FX_BOOL bPrev) { + IFX_CharIter* pIter = bPrev ? m_pPreIter->Clone() : m_pCurIter->Clone(); + if (pIter->IsEOF(!bPrev)) { + return FALSE; + } + pIter->Next(bPrev); + if (!FindNextBreakPos(pIter, bPrev, TRUE)) { + pIter->Release(); + return FALSE; + } + if (bPrev) { + m_pCurIter->Release(); + m_pCurIter = m_pPreIter; + m_pCurIter->Next(TRUE); + m_pPreIter = pIter; + } else { + m_pPreIter->Release(); + m_pPreIter = m_pCurIter; + m_pPreIter->Next(); + m_pCurIter = pIter; + } + return TRUE; +} +void CFX_WordBreak::SetAt(int32_t nIndex) { + if (m_pPreIter) { + m_pPreIter->Release(); + m_pPreIter = NULL; + } + m_pCurIter->SetAt(nIndex); + FindNextBreakPos(m_pCurIter, TRUE, FALSE); + m_pPreIter = m_pCurIter; + m_pCurIter = m_pPreIter->Clone(); + FindNextBreakPos(m_pCurIter, FALSE, FALSE); +} +int32_t CFX_WordBreak::GetWordPos() const { + return m_pPreIter->GetAt(); +} +int32_t CFX_WordBreak::GetWordLength() const { + return m_pCurIter->GetAt() - m_pPreIter->GetAt() + 1; +} +void CFX_WordBreak::GetWord(CFX_WideString& wsWord) const { + int32_t nWordLength = GetWordLength(); + if (nWordLength <= 0) { + return; + } + FX_WCHAR* lpBuf = wsWord.GetBuffer(nWordLength); + IFX_CharIter* pTempIter = m_pPreIter->Clone(); + int32_t i = 0; + while (pTempIter->GetAt() <= m_pCurIter->GetAt()) { + lpBuf[i++] = pTempIter->GetChar(); + FX_BOOL bEnd = pTempIter->Next(); + if (!bEnd) { + break; + } + } + pTempIter->Release(); + wsWord.ReleaseBuffer(nWordLength); +} +FX_BOOL CFX_WordBreak::IsEOF(FX_BOOL bTail) const { + return m_pCurIter->IsEOF(bTail); +} +FX_BOOL CFX_WordBreak::FindNextBreakPos(IFX_CharIter* pIter, + FX_BOOL bPrev, + FX_BOOL bFromNext) { + FX_WordBreakProp ePreType = FX_WordBreakProp_None; + FX_WordBreakProp eCurType = FX_WordBreakProp_None; + FX_WordBreakProp eNextType = FX_WordBreakProp_None; + if (pIter->IsEOF(!bPrev)) { + return TRUE; + } + if (!(bFromNext || pIter->IsEOF(bPrev))) { + pIter->Next(!bPrev); + FX_WCHAR wcTemp = pIter->GetChar(); + ePreType = FX_GetWordBreakProperty(wcTemp); + pIter->Next(bPrev); + } + FX_WCHAR wcTemp = pIter->GetChar(); + eCurType = FX_GetWordBreakProperty(wcTemp); + FX_BOOL bFirst = TRUE; + do { + pIter->Next(bPrev); + FX_WCHAR wcTemp = pIter->GetChar(); + eNextType = FX_GetWordBreakProperty(wcTemp); + FX_WORD wBreak = + gs_FX_WordBreak_Table[eCurType] & ((FX_WORD)(1 << eNextType)); + if (wBreak) { + if (pIter->IsEOF(!bPrev)) { + pIter->Next(!bPrev); + return TRUE; + } + if (bFirst) { + int32_t nFlags = 0; + if (eCurType == FX_WordBreakProp_MidLetter) { + if (eNextType == FX_WordBreakProp_ALetter) { + nFlags = 1; + } + } else if (eCurType == FX_WordBreakProp_MidNum) { + if (eNextType == FX_WordBreakProp_Numberic) { + nFlags = 2; + } + } else if (eCurType == FX_WordBreakProp_MidNumLet) { + if (eNextType == FX_WordBreakProp_ALetter) { + nFlags = 1; + } else if (eNextType == FX_WordBreakProp_Numberic) { + nFlags = 2; + } + } + if (nFlags > 0) { + FXSYS_assert(nFlags <= 2); + if (!((nFlags == 1 && ePreType == FX_WordBreakProp_ALetter) || + (nFlags == 2 && ePreType == FX_WordBreakProp_Numberic))) { + pIter->Next(!bPrev); + return TRUE; + } + pIter->Next(bPrev); + wBreak = FALSE; + } + bFirst = FALSE; + } + if (wBreak) { + int32_t nFlags = 0; + if (eNextType == FX_WordBreakProp_MidLetter) { + if (eCurType == FX_WordBreakProp_ALetter) { + nFlags = 1; + } + } else if (eNextType == FX_WordBreakProp_MidNum) { + if (eCurType == FX_WordBreakProp_Numberic) { + nFlags = 2; + } + } else if (eNextType == FX_WordBreakProp_MidNumLet) { + if (eCurType == FX_WordBreakProp_ALetter) { + nFlags = 1; + } else if (eCurType == FX_WordBreakProp_Numberic) { + nFlags = 2; + } + } + if (nFlags <= 0) { + pIter->Next(!bPrev); + return TRUE; + } + FXSYS_assert(nFlags <= 2); + pIter->Next(bPrev); + wcTemp = pIter->GetChar(); + eNextType = (FX_WordBreakProp)FX_GetWordBreakProperty(wcTemp); + if (!((nFlags == 1 && eNextType == FX_WordBreakProp_ALetter) || + (nFlags == 2 && eNextType == FX_WordBreakProp_Numberic))) { + pIter->Next(!bPrev); + pIter->Next(!bPrev); + return TRUE; + } + } + } + ePreType = eCurType; + eCurType = eNextType; + bFirst = FALSE; + } while (!pIter->IsEOF(!bPrev)); + return TRUE; +} +IFX_WordBreak* FX_WordBreak_Create() { + return new CFX_WordBreak; +} |