Collapse xfa/src/fee directories

xfa/src/fee/src/fx_wordbreak/fx_wordbreak_impl.cpp

-// 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/src/fx_wordbreak/fx_wordbreak_impl.h"
-
-#define FX_IsOdd(a) ((a)&1)
-
-FX_WordBreakProp FX_GetWordBreakProperty(FX_WCHAR wcCodePoint) {
-  FX_DWORD dwProperty =
-      (FX_DWORD)gs_FX_WordBreak_CodePointProperties[wcCodePoint >> 1];
-  return (FX_WordBreakProp)(FX_IsOdd(wcCodePoint) ? (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;
-}