text: // 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 "fpdfsdk/fxedit/include/fxet_edit.h"
  
  #include <algorithm>
  
  #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
  #include "core/fpdfdoc/include/cpvt_section.h"
  #include "core/fpdfdoc/include/cpvt_word.h"
  #include "core/fpdfdoc/include/ipvt_fontmap.h"
  
  namespace {
  
  const int kEditUndoMaxItems = 10000;
  
  }  // namespace
  
  CFX_Edit_Iterator::CFX_Edit_Iterator(CFX_Edit* pEdit,
                                       CPDF_VariableText::Iterator* pVTIterator)
      : m_pEdit(pEdit), m_pVTIterator(pVTIterator) {}
  
  CFX_Edit_Iterator::~CFX_Edit_Iterator() {}
  
  FX_BOOL CFX_Edit_Iterator::NextWord() {
    return m_pVTIterator->NextWord();
  }
  
  FX_BOOL CFX_Edit_Iterator::NextLine() {
    return m_pVTIterator->NextLine();
  }
  
  FX_BOOL CFX_Edit_Iterator::NextSection() {
    return m_pVTIterator->NextSection();
  }
  
  FX_BOOL CFX_Edit_Iterator::PrevWord() {
    return m_pVTIterator->PrevWord();
  }
  
  FX_BOOL CFX_Edit_Iterator::PrevLine() {
    return m_pVTIterator->PrevLine();
  }
  
  FX_BOOL CFX_Edit_Iterator::PrevSection() {
    return m_pVTIterator->PrevSection();
  }
  
  FX_BOOL CFX_Edit_Iterator::GetWord(CPVT_Word& word) const {
    ASSERT(m_pEdit);
  
    if (m_pVTIterator->GetWord(word)) {
      word.ptWord = m_pEdit->VTToEdit(word.ptWord);
      return TRUE;
    }
    return FALSE;
  }
  
  FX_BOOL CFX_Edit_Iterator::GetLine(CPVT_Line& line) const {
    ASSERT(m_pEdit);
  
    if (m_pVTIterator->GetLine(line)) {
      line.ptLine = m_pEdit->VTToEdit(line.ptLine);
      return TRUE;
    }
    return FALSE;
  }
  
  FX_BOOL CFX_Edit_Iterator::GetSection(CPVT_Section& section) const {
    ASSERT(m_pEdit);
  
    if (m_pVTIterator->GetSection(section)) {
      section.rcSection = m_pEdit->VTToEdit(section.rcSection);
      return TRUE;
    }
    return FALSE;
  }
  
  void CFX_Edit_Iterator::SetAt(int32_t nWordIndex) {
    m_pVTIterator->SetAt(nWordIndex);
  }
  
  void CFX_Edit_Iterator::SetAt(const CPVT_WordPlace& place) {
    m_pVTIterator->SetAt(place);
  }
  
  const CPVT_WordPlace& CFX_Edit_Iterator::GetAt() const {
    return m_pVTIterator->GetAt();
  }
  
  IFX_Edit* CFX_Edit_Iterator::GetEdit() const {
    return m_pEdit;
  }
  
  CFX_Edit_Provider::CFX_Edit_Provider(IPVT_FontMap* pFontMap)
      : CPDF_VariableText::Provider(pFontMap), m_pFontMap(pFontMap) {
    ASSERT(m_pFontMap);
  }
  
  CFX_Edit_Provider::~CFX_Edit_Provider() {}
  
  IPVT_FontMap* CFX_Edit_Provider::GetFontMap() {
    return m_pFontMap;
  }
  
  int32_t CFX_Edit_Provider::GetCharWidth(int32_t nFontIndex,
                                          uint16_t word,
                                          int32_t nWordStyle) {
    if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex)) {
      uint32_t charcode = word;
  
      if (pPDFFont->IsUnicodeCompatible())
        charcode = pPDFFont->CharCodeFromUnicode(word);
      else
        charcode = m_pFontMap->CharCodeFromUnicode(nFontIndex, word);
  
      if (charcode != CPDF_Font::kInvalidCharCode)
        return pPDFFont->GetCharWidthF(charcode);
    }
  
    return 0;
  }
  
  int32_t CFX_Edit_Provider::GetTypeAscent(int32_t nFontIndex) {
    if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex))
      return pPDFFont->GetTypeAscent();
  
    return 0;
  }
  
  int32_t CFX_Edit_Provider::GetTypeDescent(int32_t nFontIndex) {
    if (CPDF_Font* pPDFFont = m_pFontMap->GetPDFFont(nFontIndex))
      return pPDFFont->GetTypeDescent();
  
    return 0;
  }
  
  int32_t CFX_Edit_Provider::GetWordFontIndex(uint16_t word,
                                              int32_t charset,
                                              int32_t nFontIndex) {
    return m_pFontMap->GetWordFontIndex(word, charset, nFontIndex);
  }
  
  int32_t CFX_Edit_Provider::GetDefaultFontIndex() {
    return 0;
  }
  
  FX_BOOL CFX_Edit_Provider::IsLatinWord(uint16_t word) {
    return FX_EDIT_ISLATINWORD(word);
  }
  
  CFX_Edit_Refresh::CFX_Edit_Refresh() {}
  
  CFX_Edit_Refresh::~CFX_Edit_Refresh() {}
  
  void CFX_Edit_Refresh::BeginRefresh() {
    m_RefreshRects.Empty();
    m_OldLineRects = m_NewLineRects;
  }
  
  void CFX_Edit_Refresh::Push(const CPVT_WordRange& linerange,
                              const CFX_FloatRect& rect) {
    m_NewLineRects.Add(linerange, rect);
  }
  
  void CFX_Edit_Refresh::NoAnalyse() {
    {
      for (int32_t i = 0, sz = m_OldLineRects.GetSize(); i < sz; i++)
        if (CFX_Edit_LineRect* pOldRect = m_OldLineRects.GetAt(i))
          m_RefreshRects.Add(pOldRect->m_rcLine);
    }
  
    {
      for (int32_t i = 0, sz = m_NewLineRects.GetSize(); i < sz; i++)
        if (CFX_Edit_LineRect* pNewRect = m_NewLineRects.GetAt(i))
          m_RefreshRects.Add(pNewRect->m_rcLine);
    }
  }
  
  void CFX_Edit_Refresh::Analyse(int32_t nAlignment) {
    FX_BOOL bLineTopChanged = FALSE;
    CFX_FloatRect rcResult;
    FX_FLOAT fWidthDiff;
  
    int32_t szMax = std::max(m_OldLineRects.GetSize(), m_NewLineRects.GetSize());
    int32_t i = 0;
  
    while (i < szMax) {
      CFX_Edit_LineRect* pOldRect = m_OldLineRects.GetAt(i);
      CFX_Edit_LineRect* pNewRect = m_NewLineRects.GetAt(i);
  
      if (pOldRect) {
        if (pNewRect) {
          if (bLineTopChanged) {
            rcResult = pOldRect->m_rcLine;
            rcResult.Union(pNewRect->m_rcLine);
            m_RefreshRects.Add(rcResult);
          } else {
            if (*pNewRect != *pOldRect) {
              if (!pNewRect->IsSameTop(*pOldRect) ||
                  !pNewRect->IsSameHeight(*pOldRect)) {
                bLineTopChanged = TRUE;
                continue;
              }
  
              if (nAlignment == 0) {
                if (pNewRect->m_wrLine.BeginPos != pOldRect->m_wrLine.BeginPos) {
                  rcResult = pOldRect->m_rcLine;
                  rcResult.Union(pNewRect->m_rcLine);
                  m_RefreshRects.Add(rcResult);
                } else {
                  if (!pNewRect->IsSameLeft(*pOldRect)) {
                    rcResult = pOldRect->m_rcLine;
                    rcResult.Union(pNewRect->m_rcLine);
                  } else {
                    fWidthDiff =
                        pNewRect->m_rcLine.Width() - pOldRect->m_rcLine.Width();
                    rcResult = pNewRect->m_rcLine;
                    if (fWidthDiff > 0.0f) {
                      rcResult.left = rcResult.right - fWidthDiff;
                    } else {
                      rcResult.left = rcResult.right;
                      rcResult.right -= fWidthDiff;
                    }
                  }
                  m_RefreshRects.Add(rcResult);
                }
              } else {
                rcResult = pOldRect->m_rcLine;
                rcResult.Union(pNewRect->m_rcLine);
                m_RefreshRects.Add(rcResult);
              }
            }
          }
        } else {
          m_RefreshRects.Add(pOldRect->m_rcLine);
        }
      } else {
        if (pNewRect) {
          m_RefreshRects.Add(pNewRect->m_rcLine);
        }
      }
      i++;
    }
  }
  
  void CFX_Edit_Refresh::AddRefresh(const CFX_FloatRect& rect) {
    m_RefreshRects.Add(rect);
  }
  
  const CFX_Edit_RectArray* CFX_Edit_Refresh::GetRefreshRects() const {
    return &m_RefreshRects;
  }
  
  void CFX_Edit_Refresh::EndRefresh() {
    m_RefreshRects.Empty();
  }
  
  CFX_Edit_Undo::CFX_Edit_Undo(int32_t nBufsize)
      : m_nCurUndoPos(0),
        m_nBufSize(nBufsize),
        m_bModified(FALSE),
        m_bVirgin(TRUE),
        m_bWorking(FALSE) {}
  
  CFX_Edit_Undo::~CFX_Edit_Undo() {
    Reset();
  }
  
  FX_BOOL CFX_Edit_Undo::CanUndo() const {
    return m_nCurUndoPos > 0;
  }
  
  void CFX_Edit_Undo::Undo() {
    m_bWorking = TRUE;
  
    if (m_nCurUndoPos > 0) {
      IFX_Edit_UndoItem* pItem = m_UndoItemStack.GetAt(m_nCurUndoPos - 1);
      pItem->Undo();
  
      m_nCurUndoPos--;
      m_bModified = (m_nCurUndoPos != 0);
    }
  
    m_bWorking = FALSE;
  }
  
  FX_BOOL CFX_Edit_Undo::CanRedo() const {
    return m_nCurUndoPos < m_UndoItemStack.GetSize();
  }
  
  void CFX_Edit_Undo::Redo() {
    m_bWorking = TRUE;
  
    int32_t nStackSize = m_UndoItemStack.GetSize();
  
    if (m_nCurUndoPos < nStackSize) {
      IFX_Edit_UndoItem* pItem = m_UndoItemStack.GetAt(m_nCurUndoPos);
      pItem->Redo();
  
      m_nCurUndoPos++;
      m_bModified = (m_nCurUndoPos != 0);
    }
  
    m_bWorking = FALSE;
  }
  
  FX_BOOL CFX_Edit_Undo::IsWorking() const {
    return m_bWorking;
  }
  
  void CFX_Edit_Undo::AddItem(IFX_Edit_UndoItem* pItem) {
    ASSERT(!m_bWorking);
    ASSERT(pItem);
    ASSERT(m_nBufSize > 1);
  
    if (m_nCurUndoPos < m_UndoItemStack.GetSize())
      RemoveTails();
  
    if (m_UndoItemStack.GetSize() >= m_nBufSize) {
      RemoveHeads();
      m_bVirgin = FALSE;
    }
  
    m_UndoItemStack.Add(pItem);
    m_nCurUndoPos = m_UndoItemStack.GetSize();
  
    m_bModified = (m_nCurUndoPos != 0);
  }
  
  FX_BOOL CFX_Edit_Undo::IsModified() const {
    return m_bVirgin ? m_bModified : TRUE;
  }
  
  IFX_Edit_UndoItem* CFX_Edit_Undo::GetItem(int32_t nIndex) {
    if (nIndex >= 0 && nIndex < m_UndoItemStack.GetSize())
      return m_UndoItemStack.GetAt(nIndex);
  
    return NULL;
  }
  
  void CFX_Edit_Undo::RemoveHeads() {
    ASSERT(m_UndoItemStack.GetSize() > 1);
  
    delete m_UndoItemStack.GetAt(0);
    m_UndoItemStack.RemoveAt(0);
  }
  
  void CFX_Edit_Undo::RemoveTails() {
    for (int32_t i = m_UndoItemStack.GetSize() - 1; i >= m_nCurUndoPos; i--) {
      delete m_UndoItemStack.GetAt(i);
      m_UndoItemStack.RemoveAt(i);
    }
  }
  
  void CFX_Edit_Undo::Reset() {
    for (int32_t i = 0, sz = m_UndoItemStack.GetSize(); i < sz; i++) {
      delete m_UndoItemStack.GetAt(i);
    }
    m_nCurUndoPos = 0;
    m_UndoItemStack.RemoveAll();
  }
  
  CFX_Edit_GroupUndoItem::CFX_Edit_GroupUndoItem(const CFX_WideString& sTitle)
      : m_sTitle(sTitle) {}
  
  CFX_Edit_GroupUndoItem::~CFX_Edit_GroupUndoItem() {
    for (int i = 0, sz = m_Items.GetSize(); i < sz; i++) {
      delete m_Items[i];
    }
  
    m_Items.RemoveAll();
  }
  
  void CFX_Edit_GroupUndoItem::AddUndoItem(CFX_Edit_UndoItem* pUndoItem) {
    pUndoItem->SetFirst(FALSE);
    pUndoItem->SetLast(FALSE);
  
    m_Items.Add(pUndoItem);
  
    if (m_sTitle.IsEmpty())
      m_sTitle = pUndoItem->GetUndoTitle();
  }
  
  void CFX_Edit_GroupUndoItem::UpdateItems() {
    if (m_Items.GetSize() > 0) {
      CFX_Edit_UndoItem* pFirstItem = m_Items[0];
      pFirstItem->SetFirst(TRUE);
  
      CFX_Edit_UndoItem* pLastItem = m_Items[m_Items.GetSize() - 1];
      pLastItem->SetLast(TRUE);
    }
  }
  
  void CFX_Edit_GroupUndoItem::Undo() {
    for (int i = m_Items.GetSize() - 1; i >= 0; i--) {
      CFX_Edit_UndoItem* pUndoItem = m_Items[i];
      pUndoItem->Undo();
    }
  }
  
  void CFX_Edit_GroupUndoItem::Redo() {
    for (int i = 0, sz = m_Items.GetSize(); i < sz; i++) {
      CFX_Edit_UndoItem* pUndoItem = m_Items[i];
      pUndoItem->Redo();
    }
  }
  
  CFX_WideString CFX_Edit_GroupUndoItem::GetUndoTitle() {
    return m_sTitle;
  }
  
  CFXEU_InsertWord::CFXEU_InsertWord(CFX_Edit* pEdit,
                                     const CPVT_WordPlace& wpOldPlace,
                                     const CPVT_WordPlace& wpNewPlace,
                                     uint16_t word,
                                     int32_t charset,
                                     const CPVT_WordProps* pWordProps)
      : m_pEdit(pEdit),
        m_wpOld(wpOldPlace),
        m_wpNew(wpNewPlace),
        m_Word(word),
        m_nCharset(charset),
        m_WordProps() {
    if (pWordProps)
      m_WordProps = *pWordProps;
  }
  
  CFXEU_InsertWord::~CFXEU_InsertWord() {}
  
  void CFXEU_InsertWord::Redo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpOld);
      m_pEdit->InsertWord(m_Word, m_nCharset, &m_WordProps, FALSE, TRUE);
    }
  }
  
  void CFXEU_InsertWord::Undo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpNew);
      m_pEdit->Backspace(FALSE, TRUE);
    }
  }
  
  CFXEU_InsertReturn::CFXEU_InsertReturn(CFX_Edit* pEdit,
                                         const CPVT_WordPlace& wpOldPlace,
                                         const CPVT_WordPlace& wpNewPlace,
                                         const CPVT_SecProps* pSecProps,
                                         const CPVT_WordProps* pWordProps)
      : m_pEdit(pEdit),
        m_wpOld(wpOldPlace),
        m_wpNew(wpNewPlace),
        m_SecProps(),
        m_WordProps() {
    if (pSecProps)
      m_SecProps = *pSecProps;
    if (pWordProps)
      m_WordProps = *pWordProps;
  }
  
  CFXEU_InsertReturn::~CFXEU_InsertReturn() {}
  
  void CFXEU_InsertReturn::Redo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpOld);
      m_pEdit->InsertReturn(&m_SecProps, &m_WordProps, FALSE, TRUE);
    }
  }
  
  void CFXEU_InsertReturn::Undo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpNew);
      m_pEdit->Backspace(FALSE, TRUE);
    }
  }
  
  CFXEU_Backspace::CFXEU_Backspace(CFX_Edit* pEdit,
                                   const CPVT_WordPlace& wpOldPlace,
                                   const CPVT_WordPlace& wpNewPlace,
                                   uint16_t word,
                                   int32_t charset,
                                   const CPVT_SecProps& SecProps,
                                   const CPVT_WordProps& WordProps)
      : m_pEdit(pEdit),
        m_wpOld(wpOldPlace),
        m_wpNew(wpNewPlace),
        m_Word(word),
        m_nCharset(charset),
        m_SecProps(SecProps),
        m_WordProps(WordProps) {}
  
  CFXEU_Backspace::~CFXEU_Backspace() {}
  
  void CFXEU_Backspace::Redo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpOld);
      m_pEdit->Backspace(FALSE, TRUE);
    }
  }
  
  void CFXEU_Backspace::Undo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpNew);
      if (m_wpNew.SecCmp(m_wpOld) != 0) {
        m_pEdit->InsertReturn(&m_SecProps, &m_WordProps, FALSE, TRUE);
      } else {
        m_pEdit->InsertWord(m_Word, m_nCharset, &m_WordProps, FALSE, TRUE);
      }
    }
  }
  
  CFXEU_Delete::CFXEU_Delete(CFX_Edit* pEdit,
                             const CPVT_WordPlace& wpOldPlace,
                             const CPVT_WordPlace& wpNewPlace,
                             uint16_t word,
                             int32_t charset,
                             const CPVT_SecProps& SecProps,
                             const CPVT_WordProps& WordProps,
                             FX_BOOL bSecEnd)
      : m_pEdit(pEdit),
        m_wpOld(wpOldPlace),
        m_wpNew(wpNewPlace),
        m_Word(word),
        m_nCharset(charset),
        m_SecProps(SecProps),
        m_WordProps(WordProps),
        m_bSecEnd(bSecEnd) {}
  
  CFXEU_Delete::~CFXEU_Delete() {}
  
  void CFXEU_Delete::Redo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpOld);
      m_pEdit->Delete(FALSE, TRUE);
    }
  }
  
  void CFXEU_Delete::Undo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpNew);
      if (m_bSecEnd) {
        m_pEdit->InsertReturn(&m_SecProps, &m_WordProps, FALSE, TRUE);
      } else {
        m_pEdit->InsertWord(m_Word, m_nCharset, &m_WordProps, FALSE, TRUE);
      }
    }
  }
  
  CFXEU_Clear::CFXEU_Clear(CFX_Edit* pEdit,
                           const CPVT_WordRange& wrSel,
                           const CFX_WideString& swText)
      : m_pEdit(pEdit), m_wrSel(wrSel), m_swText(swText) {}
  
  CFXEU_Clear::~CFXEU_Clear() {}
  
  void CFXEU_Clear::Redo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetSel(m_wrSel.BeginPos, m_wrSel.EndPos);
      m_pEdit->Clear(FALSE, TRUE);
    }
  }
  
  void CFXEU_Clear::Undo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wrSel.BeginPos);
      m_pEdit->InsertText(m_swText.c_str(), DEFAULT_CHARSET, NULL, NULL, FALSE,
                          TRUE);
      m_pEdit->SetSel(m_wrSel.BeginPos, m_wrSel.EndPos);
    }
  }
  
  CFXEU_ClearRich::CFXEU_ClearRich(CFX_Edit* pEdit,
                                   const CPVT_WordPlace& wpOldPlace,
                                   const CPVT_WordPlace& wpNewPlace,
                                   const CPVT_WordRange& wrSel,
                                   uint16_t word,
                                   int32_t charset,
                                   const CPVT_SecProps& SecProps,
                                   const CPVT_WordProps& WordProps)
      : m_pEdit(pEdit),
        m_wpOld(wpOldPlace),
        m_wpNew(wpNewPlace),
        m_wrSel(wrSel),
        m_Word(word),
        m_nCharset(charset),
        m_SecProps(SecProps),
        m_WordProps(WordProps) {}
  
  CFXEU_ClearRich::~CFXEU_ClearRich() {}
  
  void CFXEU_ClearRich::Redo() {
    if (m_pEdit && IsLast()) {
      m_pEdit->SelectNone();
      m_pEdit->SetSel(m_wrSel.BeginPos, m_wrSel.EndPos);
      m_pEdit->Clear(FALSE, TRUE);
    }
  }
  
  void CFXEU_ClearRich::Undo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpOld);
      if (m_wpNew.SecCmp(m_wpOld) != 0) {
        m_pEdit->InsertReturn(&m_SecProps, &m_WordProps, FALSE, FALSE);
      } else {
        m_pEdit->InsertWord(m_Word, m_nCharset, &m_WordProps, FALSE, FALSE);
      }
  
      if (IsFirst()) {
        m_pEdit->PaintInsertText(m_wrSel.BeginPos, m_wrSel.EndPos);
        m_pEdit->SetSel(m_wrSel.BeginPos, m_wrSel.EndPos);
      }
    }
  }
  CFXEU_InsertText::CFXEU_InsertText(CFX_Edit* pEdit,
                                     const CPVT_WordPlace& wpOldPlace,
                                     const CPVT_WordPlace& wpNewPlace,
                                     const CFX_WideString& swText,
                                     int32_t charset,
                                     const CPVT_SecProps* pSecProps,
                                     const CPVT_WordProps* pWordProps)
      : m_pEdit(pEdit),
        m_wpOld(wpOldPlace),
        m_wpNew(wpNewPlace),
        m_swText(swText),
        m_nCharset(charset),
        m_SecProps(),
        m_WordProps() {
    if (pSecProps)
      m_SecProps = *pSecProps;
    if (pWordProps)
      m_WordProps = *pWordProps;
  }
  
  CFXEU_InsertText::~CFXEU_InsertText() {}
  
  void CFXEU_InsertText::Redo() {
    if (m_pEdit && IsLast()) {
      m_pEdit->SelectNone();
      m_pEdit->SetCaret(m_wpOld);
      m_pEdit->InsertText(m_swText.c_str(), m_nCharset, &m_SecProps, &m_WordProps,
                          FALSE, TRUE);
    }
  }
  
  void CFXEU_InsertText::Undo() {
    if (m_pEdit) {
      m_pEdit->SelectNone();
      m_pEdit->SetSel(m_wpOld, m_wpNew);
      m_pEdit->Clear(FALSE, TRUE);
    }
  }
  
  CFXEU_SetSecProps::CFXEU_SetSecProps(CFX_Edit* pEdit,
                                       const CPVT_WordPlace& place,
                                       EDIT_PROPS_E ep,
                                       const CPVT_SecProps& oldsecprops,
                                       const CPVT_WordProps& oldwordprops,
                                       const CPVT_SecProps& newsecprops,
                                       const CPVT_WordProps& newwordprops,
                                       const CPVT_WordRange& range)
      : m_pEdit(pEdit),
        m_wpPlace(place),
        m_wrPlace(range),
        m_eProps(ep),
        m_OldSecProps(oldsecprops),
        m_NewSecProps(newsecprops),
        m_OldWordProps(oldwordprops),
        m_NewWordProps(newwordprops) {}
  
  CFXEU_SetSecProps::~CFXEU_SetSecProps() {}
  
  void CFXEU_SetSecProps::Redo() {
    if (m_pEdit) {
      m_pEdit->SetSecProps(m_eProps, m_wpPlace, &m_NewSecProps, &m_NewWordProps,
                           m_wrPlace, FALSE);
      if (IsLast()) {
        m_pEdit->SelectNone();
        m_pEdit->PaintSetProps(m_eProps, m_wrPlace);
        m_pEdit->SetSel(m_wrPlace.BeginPos, m_wrPlace.EndPos);
      }
    }
  }
  
  void CFXEU_SetSecProps::Undo() {
    if (m_pEdit) {
      m_pEdit->SetSecProps(m_eProps, m_wpPlace, &m_OldSecProps, &m_OldWordProps,
                           m_wrPlace, FALSE);
      if (IsFirst()) {
        m_pEdit->SelectNone();
        m_pEdit->PaintSetProps(m_eProps, m_wrPlace);
        m_pEdit->SetSel(m_wrPlace.BeginPos, m_wrPlace.EndPos);
      }
    }
  }
  
  CFXEU_SetWordProps::CFXEU_SetWordProps(CFX_Edit* pEdit,
                                         const CPVT_WordPlace& place,
                                         EDIT_PROPS_E ep,
                                         const CPVT_WordProps& oldprops,
                                         const CPVT_WordProps& newprops,
                                         const CPVT_WordRange& range)
      : m_pEdit(pEdit),
        m_wpPlace(place),
        m_wrPlace(range),
        m_eProps(ep),
        m_OldWordProps(oldprops),
        m_NewWordProps(newprops) {}
  
  CFXEU_SetWordProps::~CFXEU_SetWordProps() {}
  
  void CFXEU_SetWordProps::Redo() {
    if (m_pEdit) {
      m_pEdit->SetWordProps(m_eProps, m_wpPlace, &m_NewWordProps, m_wrPlace,
                            FALSE);
      if (IsLast()) {
        m_pEdit->SelectNone();
        m_pEdit->PaintSetProps(m_eProps, m_wrPlace);
        m_pEdit->SetSel(m_wrPlace.BeginPos, m_wrPlace.EndPos);
      }
    }
  }
  
  void CFXEU_SetWordProps::Undo() {
    if (m_pEdit) {
      m_pEdit->SetWordProps(m_eProps, m_wpPlace, &m_OldWordProps, m_wrPlace,
                            FALSE);
      if (IsFirst()) {
        m_pEdit->SelectNone();
        m_pEdit->PaintSetProps(m_eProps, m_wrPlace);
        m_pEdit->SetSel(m_wrPlace.BeginPos, m_wrPlace.EndPos);
      }
    }
  }
  
  CFX_Edit::CFX_Edit(CPDF_VariableText* pVT)
      : m_pVT(pVT),
        m_pNotify(nullptr),
        m_pOprNotify(nullptr),
        m_wpCaret(-1, -1, -1),
        m_wpOldCaret(-1, -1, -1),
        m_SelState(),
        m_ptScrollPos(0, 0),
        m_ptRefreshScrollPos(0, 0),
        m_bEnableScroll(FALSE),
        m_pIterator(nullptr),
        m_ptCaret(0.0f, 0.0f),
        m_Undo(kEditUndoMaxItems),
        m_nAlignment(0),
        m_bNotifyFlag(FALSE),
        m_bEnableOverflow(FALSE),
        m_bEnableRefresh(TRUE),
        m_rcOldContent(0.0f, 0.0f, 0.0f, 0.0f),
        m_bEnableUndo(TRUE),
        m_bNotify(TRUE),
        m_bOprNotify(FALSE),
        m_pGroupUndoItem(nullptr) {
    ASSERT(pVT);
  }
  
  CFX_Edit::~CFX_Edit() {
    ASSERT(!m_pGroupUndoItem);
  }
  
  void CFX_Edit::Initialize() {
    m_pVT->Initialize();
    SetCaret(m_pVT->GetBeginWordPlace());
    SetCaretOrigin();
  }
  
  void CFX_Edit::SetFontMap(IPVT_FontMap* pFontMap) {
    m_pVTProvider.reset(new CFX_Edit_Provider(pFontMap));
    m_pVT->SetProvider(m_pVTProvider.get());
  }
  
  void CFX_Edit::SetNotify(IFX_Edit_Notify* pNotify) {
    m_pNotify = pNotify;
  }
  
  void CFX_Edit::SetOprNotify(IFX_Edit_OprNotify* pOprNotify) {
    m_pOprNotify = pOprNotify;
  }
  
  IFX_Edit_Iterator* CFX_Edit::GetIterator() {
    if (!m_pIterator)
      m_pIterator.reset(new CFX_Edit_Iterator(this, m_pVT->GetIterator()));
    return m_pIterator.get();
  }
  
  CPDF_VariableText* CFX_Edit::GetVariableText() {
    return m_pVT;
  }
  
  IPVT_FontMap* CFX_Edit::GetFontMap() {
    return m_pVTProvider ? m_pVTProvider->GetFontMap() : nullptr;
  }
  
  void CFX_Edit::SetPlateRect(const CFX_FloatRect& rect, FX_BOOL bPaint) {
    m_pVT->SetPlateRect(rect);
    m_ptScrollPos = CFX_FloatPoint(rect.left, rect.top);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetAlignmentH(int32_t nFormat, FX_BOOL bPaint) {
    m_pVT->SetAlignment(nFormat);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetAlignmentV(int32_t nFormat, FX_BOOL bPaint) {
    m_nAlignment = nFormat;
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetPasswordChar(uint16_t wSubWord, FX_BOOL bPaint) {
    m_pVT->SetPasswordChar(wSubWord);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetLimitChar(int32_t nLimitChar, FX_BOOL bPaint) {
    m_pVT->SetLimitChar(nLimitChar);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetCharArray(int32_t nCharArray, FX_BOOL bPaint) {
    m_pVT->SetCharArray(nCharArray);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetCharSpace(FX_FLOAT fCharSpace, FX_BOOL bPaint) {
    m_pVT->SetCharSpace(fCharSpace);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetHorzScale(int32_t nHorzScale, FX_BOOL bPaint) {
    m_pVT->SetHorzScale(nHorzScale);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetMultiLine(FX_BOOL bMultiLine, FX_BOOL bPaint) {
    m_pVT->SetMultiLine(bMultiLine);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetAutoReturn(FX_BOOL bAuto, FX_BOOL bPaint) {
    m_pVT->SetAutoReturn(bAuto);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetLineLeading(FX_FLOAT fLineLeading, FX_BOOL bPaint) {
    m_pVT->SetLineLeading(fLineLeading);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetAutoFontSize(FX_BOOL bAuto, FX_BOOL bPaint) {
    m_pVT->SetAutoFontSize(bAuto);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetFontSize(FX_FLOAT fFontSize, FX_BOOL bPaint) {
    m_pVT->SetFontSize(fFontSize);
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetAutoScroll(FX_BOOL bAuto, FX_BOOL bPaint) {
    m_bEnableScroll = bAuto;
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetTextOverflow(FX_BOOL bAllowed, FX_BOOL bPaint) {
    m_bEnableOverflow = bAllowed;
    if (bPaint)
      Paint();
  }
  
  void CFX_Edit::SetSel(int32_t nStartChar, int32_t nEndChar) {
    if (m_pVT->IsValid()) {
      if (nStartChar == 0 && nEndChar < 0) {
        SelectAll();
      } else if (nStartChar < 0) {
        SelectNone();
      } else {
        if (nStartChar < nEndChar) {
          SetSel(m_pVT->WordIndexToWordPlace(nStartChar),
                 m_pVT->WordIndexToWordPlace(nEndChar));
        } else {
          SetSel(m_pVT->WordIndexToWordPlace(nEndChar),
                 m_pVT->WordIndexToWordPlace(nStartChar));
        }
      }
    }
  }
  
  void CFX_Edit::SetSel(const CPVT_WordPlace& begin, const CPVT_WordPlace& end) {
    if (m_pVT->IsValid()) {
      SelectNone();
  
      m_SelState.Set(begin, end);
  
      SetCaret(m_SelState.EndPos);
  
      if (m_SelState.IsExist()) {
        ScrollToCaret();
        CPVT_WordRange wr(m_SelState.BeginPos, m_SelState.EndPos);
        Refresh(RP_OPTIONAL, &wr);
        SetCaretInfo();
      } else {
        ScrollToCaret();
        SetCaretInfo();
      }
    }
  }
  
  void CFX_Edit::GetSel(int32_t& nStartChar, int32_t& nEndChar) const {
    nStartChar = -1;
    nEndChar = -1;
  
    if (m_pVT->IsValid()) {
      if (m_SelState.IsExist()) {
        if (m_SelState.BeginPos.WordCmp(m_SelState.EndPos) < 0) {
          nStartChar = m_pVT->WordPlaceToWordIndex(m_SelState.BeginPos);
          nEndChar = m_pVT->WordPlaceToWordIndex(m_SelState.EndPos);
        } else {
          nStartChar = m_pVT->WordPlaceToWordIndex(m_SelState.EndPos);
          nEndChar = m_pVT->WordPlaceToWordIndex(m_SelState.BeginPos);
        }
      } else {
        nStartChar = m_pVT->WordPlaceToWordIndex(m_wpCaret);
        nEndChar = m_pVT->WordPlaceToWordIndex(m_wpCaret);
      }
    }
  }
  
  int32_t CFX_Edit::GetCaret() const {
    if (m_pVT->IsValid())
      return m_pVT->WordPlaceToWordIndex(m_wpCaret);
  
    return -1;
  }
  
  CPVT_WordPlace CFX_Edit::GetCaretWordPlace() const {
    return m_wpCaret;
  }
  
  CFX_WideString CFX_Edit::GetText() const {
    CFX_WideString swRet;
  
    if (!m_pVT->IsValid())
      return swRet;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    pIterator->SetAt(0);
  
    CPVT_Word wordinfo;
    CPVT_WordPlace oldplace = pIterator->GetAt();
    while (pIterator->NextWord()) {
      CPVT_WordPlace place = pIterator->GetAt();
  
      if (pIterator->GetWord(wordinfo))
        swRet += wordinfo.Word;
  
      if (oldplace.SecCmp(place) != 0)
        swRet += L"\r\n";
  
      oldplace = place;
    }
  
    return swRet;
  }
  
  CFX_WideString CFX_Edit::GetRangeText(const CPVT_WordRange& range) const {
    CFX_WideString swRet;
  
    if (!m_pVT->IsValid())
      return swRet;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    CPVT_WordRange wrTemp = range;
    m_pVT->UpdateWordPlace(wrTemp.BeginPos);
    m_pVT->UpdateWordPlace(wrTemp.EndPos);
    pIterator->SetAt(wrTemp.BeginPos);
  
    CPVT_Word wordinfo;
    CPVT_WordPlace oldplace = wrTemp.BeginPos;
    while (pIterator->NextWord()) {
      CPVT_WordPlace place = pIterator->GetAt();
      if (place.WordCmp(wrTemp.EndPos) > 0)
        break;
  
      if (pIterator->GetWord(wordinfo))
        swRet += wordinfo.Word;
  
      if (oldplace.SecCmp(place) != 0)
        swRet += L"\r\n";
  
      oldplace = place;
    }
  
    return swRet;
  }
  
  CFX_WideString CFX_Edit::GetSelText() const {
    return GetRangeText(m_SelState.ConvertToWordRange());
  }
  
  int32_t CFX_Edit::GetTotalWords() const {
    return m_pVT->GetTotalWords();
  }
  
  int32_t CFX_Edit::GetTotalLines() const {
    int32_t nLines = 1;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    pIterator->SetAt(0);
    while (pIterator->NextLine())
      ++nLines;
  
    return nLines;
  }
  
  CPVT_WordRange CFX_Edit::GetSelectWordRange() const {
    return m_SelState.ConvertToWordRange();
  }
  
  CPVT_WordRange CFX_Edit::CombineWordRange(const CPVT_WordRange& wr1,
                                            const CPVT_WordRange& wr2) {
    CPVT_WordRange wrRet;
  
    if (wr1.BeginPos.WordCmp(wr2.BeginPos) < 0) {
      wrRet.BeginPos = wr1.BeginPos;
    } else {
      wrRet.BeginPos = wr2.BeginPos;
    }
  
    if (wr1.EndPos.WordCmp(wr2.EndPos) < 0) {
      wrRet.EndPos = wr2.EndPos;
    } else {
      wrRet.EndPos = wr1.EndPos;
    }
  
    return wrRet;
  }
  
  FX_BOOL CFX_Edit::IsRichText() const {
    return m_pVT->IsRichText();
  }
  
  void CFX_Edit::SetRichText(FX_BOOL bRichText, FX_BOOL bPaint) {
    m_pVT->SetRichText(bRichText);
    if (bPaint)
      Paint();
  }
  
  FX_BOOL CFX_Edit::SetRichFontIndex(int32_t nFontIndex) {
    CPVT_WordProps WordProps;
    WordProps.nFontIndex = nFontIndex;
    return SetRichTextProps(EP_FONTINDEX, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichFontSize(FX_FLOAT fFontSize) {
    CPVT_WordProps WordProps;
    WordProps.fFontSize = fFontSize;
    return SetRichTextProps(EP_FONTSIZE, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextColor(FX_COLORREF dwColor) {
    CPVT_WordProps WordProps;
    WordProps.dwWordColor = dwColor;
    return SetRichTextProps(EP_WORDCOLOR, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextScript(CPDF_VariableText::ScriptType nScriptType) {
    CPVT_WordProps WordProps;
    WordProps.nScriptType = nScriptType;
    return SetRichTextProps(EP_SCRIPTTYPE, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextBold(FX_BOOL bBold) {
    CPVT_WordProps WordProps;
    if (bBold)
      WordProps.nWordStyle |= PVTWORD_STYLE_BOLD;
    return SetRichTextProps(EP_BOLD, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextItalic(FX_BOOL bItalic) {
    CPVT_WordProps WordProps;
    if (bItalic)
      WordProps.nWordStyle |= PVTWORD_STYLE_ITALIC;
    return SetRichTextProps(EP_ITALIC, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextUnderline(FX_BOOL bUnderline) {
    CPVT_WordProps WordProps;
    if (bUnderline)
      WordProps.nWordStyle |= PVTWORD_STYLE_UNDERLINE;
    return SetRichTextProps(EP_UNDERLINE, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextCrossout(FX_BOOL bCrossout) {
    CPVT_WordProps WordProps;
    if (bCrossout)
      WordProps.nWordStyle |= PVTWORD_STYLE_CROSSOUT;
    return SetRichTextProps(EP_CROSSOUT, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextCharSpace(FX_FLOAT fCharSpace) {
    CPVT_WordProps WordProps;
    WordProps.fCharSpace = fCharSpace;
    return SetRichTextProps(EP_CHARSPACE, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextHorzScale(int32_t nHorzScale) {
    CPVT_WordProps WordProps;
    WordProps.nHorzScale = nHorzScale;
    return SetRichTextProps(EP_HORZSCALE, NULL, &WordProps);
  }
  
  FX_BOOL CFX_Edit::SetRichTextLineLeading(FX_FLOAT fLineLeading) {
    CPVT_SecProps SecProps;
    SecProps.fLineLeading = fLineLeading;
    return SetRichTextProps(EP_LINELEADING, &SecProps, NULL);
  }
  
  FX_BOOL CFX_Edit::SetRichTextLineIndent(FX_FLOAT fLineIndent) {
    CPVT_SecProps SecProps;
    SecProps.fLineIndent = fLineIndent;
    return SetRichTextProps(EP_LINEINDENT, &SecProps, NULL);
  }
  
  FX_BOOL CFX_Edit::SetRichTextAlignment(int32_t nAlignment) {
    CPVT_SecProps SecProps;
    SecProps.nAlignment = nAlignment;
    return SetRichTextProps(EP_ALIGNMENT, &SecProps, NULL);
  }
  
  FX_BOOL CFX_Edit::SetRichTextProps(EDIT_PROPS_E eProps,
                                     const CPVT_SecProps* pSecProps,
                                     const CPVT_WordProps* pWordProps) {
    if (!m_pVT->IsValid() || !m_pVT->IsRichText())
      return FALSE;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    CPVT_WordRange wrTemp = m_SelState.ConvertToWordRange();
  
    m_pVT->UpdateWordPlace(wrTemp.BeginPos);
    m_pVT->UpdateWordPlace(wrTemp.EndPos);
    pIterator->SetAt(wrTemp.BeginPos);
  
    BeginGroupUndo(L"");
    FX_BOOL bSet =
        SetSecProps(eProps, wrTemp.BeginPos, pSecProps, pWordProps, wrTemp, TRUE);
  
    while (pIterator->NextWord()) {
      CPVT_WordPlace place = pIterator->GetAt();
      if (place.WordCmp(wrTemp.EndPos) > 0)
        break;
      FX_BOOL bSet1 =
          SetSecProps(eProps, place, pSecProps, pWordProps, wrTemp, TRUE);
      FX_BOOL bSet2 = SetWordProps(eProps, place, pWordProps, wrTemp, TRUE);
  
      if (!bSet)
        bSet = (bSet1 || bSet2);
    }
  
    EndGroupUndo();
  
    if (bSet)
      PaintSetProps(eProps, wrTemp);
  
    return bSet;
  }
  
  void CFX_Edit::PaintSetProps(EDIT_PROPS_E eProps, const CPVT_WordRange& wr) {
    switch (eProps) {
      case EP_LINELEADING:
      case EP_LINEINDENT:
      case EP_ALIGNMENT:
        RearrangePart(wr);
        ScrollToCaret();
        Refresh(RP_ANALYSE);
        SetCaretOrigin();
        SetCaretInfo();
        break;
      case EP_WORDCOLOR:
      case EP_UNDERLINE:
      case EP_CROSSOUT:
        Refresh(RP_OPTIONAL, &wr);
        break;
      case EP_FONTINDEX:
      case EP_FONTSIZE:
      case EP_SCRIPTTYPE:
      case EP_CHARSPACE:
      case EP_HORZSCALE:
      case EP_BOLD:
      case EP_ITALIC:
        RearrangePart(wr);
        ScrollToCaret();
  
        CPVT_WordRange wrRefresh(m_pVT->GetSectionBeginPlace(wr.BeginPos),
                                 m_pVT->GetSectionEndPlace(wr.EndPos));
        Refresh(RP_ANALYSE, &wrRefresh);
  
        SetCaretOrigin();
        SetCaretInfo();
        break;
    }
  }
  
  FX_BOOL CFX_Edit::SetSecProps(EDIT_PROPS_E eProps,
                                const CPVT_WordPlace& place,
                                const CPVT_SecProps* pSecProps,
                                const CPVT_WordProps* pWordProps,
                                const CPVT_WordRange& wr,
                                FX_BOOL bAddUndo) {
    if (!m_pVT->IsValid() || !m_pVT->IsRichText())
      return FALSE;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    FX_BOOL bSet = FALSE;
    CPVT_Section secinfo;
    CPVT_Section OldSecinfo;
  
    CPVT_WordPlace oldplace = pIterator->GetAt();
  
    if (eProps == EP_LINELEADING || eProps == EP_LINEINDENT ||
        eProps == EP_ALIGNMENT) {
      if (pSecProps) {
        pIterator->SetAt(place);
        if (pIterator->GetSection(secinfo)) {
          if (bAddUndo)
            OldSecinfo = secinfo;
  
          switch (eProps) {
            case EP_LINELEADING:
              if (!FX_EDIT_IsFloatEqual(secinfo.SecProps.fLineLeading,
                                        pSecProps->fLineLeading)) {
                secinfo.SecProps.fLineLeading = pSecProps->fLineLeading;
                bSet = TRUE;
              }
              break;
            case EP_LINEINDENT:
              if (!FX_EDIT_IsFloatEqual(secinfo.SecProps.fLineIndent,
                                        pSecProps->fLineIndent)) {
                secinfo.SecProps.fLineIndent = pSecProps->fLineIndent;
                bSet = TRUE;
              }
              break;
            case EP_ALIGNMENT:
              if (secinfo.SecProps.nAlignment != pSecProps->nAlignment) {
                secinfo.SecProps.nAlignment = pSecProps->nAlignment;
                bSet = TRUE;
              }
              break;
            default:
              break;
          }
        }
      }
    } else {
      if (pWordProps && place == m_pVT->GetSectionBeginPlace(place)) {
        pIterator->SetAt(place);
        if (pIterator->GetSection(secinfo)) {
          if (bAddUndo)
            OldSecinfo = secinfo;
  
          switch (eProps) {
            case EP_FONTINDEX:
              if (secinfo.WordProps.nFontIndex != pWordProps->nFontIndex) {
                secinfo.WordProps.nFontIndex = pWordProps->nFontIndex;
                bSet = TRUE;
              }
              break;
            case EP_FONTSIZE:
              if (!FX_EDIT_IsFloatEqual(secinfo.WordProps.fFontSize,
                                        pWordProps->fFontSize)) {
                secinfo.WordProps.fFontSize = pWordProps->fFontSize;
                bSet = TRUE;
              }
              break;
            case EP_WORDCOLOR:
              if (secinfo.WordProps.dwWordColor != pWordProps->dwWordColor) {
                secinfo.WordProps.dwWordColor = pWordProps->dwWordColor;
                bSet = TRUE;
              }
              break;
            case EP_SCRIPTTYPE:
              if (secinfo.WordProps.nScriptType != pWordProps->nScriptType) {
                secinfo.WordProps.nScriptType = pWordProps->nScriptType;
                bSet = TRUE;
              }
              break;
            case EP_CHARSPACE:
              if (!FX_EDIT_IsFloatEqual(secinfo.WordProps.fCharSpace,
                                        pWordProps->fCharSpace)) {
                secinfo.WordProps.fCharSpace = pWordProps->fCharSpace;
                bSet = TRUE;
              }
              break;
            case EP_HORZSCALE:
              if (secinfo.WordProps.nHorzScale != pWordProps->nHorzScale) {
                secinfo.WordProps.nHorzScale = pWordProps->nHorzScale;
                bSet = TRUE;
              }
              break;
            case EP_UNDERLINE:
              if (pWordProps->nWordStyle & PVTWORD_STYLE_UNDERLINE) {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_UNDERLINE) ==
                    0) {
                  secinfo.WordProps.nWordStyle |= PVTWORD_STYLE_UNDERLINE;
                  bSet = TRUE;
                }
              } else {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_UNDERLINE) !=
                    0) {
                  secinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_UNDERLINE;
                  bSet = TRUE;
                }
              }
              break;
            case EP_CROSSOUT:
              if (pWordProps->nWordStyle & PVTWORD_STYLE_CROSSOUT) {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_CROSSOUT) ==
                    0) {
                  secinfo.WordProps.nWordStyle |= PVTWORD_STYLE_CROSSOUT;
                  bSet = TRUE;
                }
              } else {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_CROSSOUT) !=
                    0) {
                  secinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_CROSSOUT;
                  bSet = TRUE;
                }
              }
              break;
            case EP_BOLD:
              if (pWordProps->nWordStyle & PVTWORD_STYLE_BOLD) {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_BOLD) == 0) {
                  secinfo.WordProps.nWordStyle |= PVTWORD_STYLE_BOLD;
                  bSet = TRUE;
                }
              } else {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_BOLD) != 0) {
                  secinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_BOLD;
                  bSet = TRUE;
                }
              }
              break;
            case EP_ITALIC:
              if (pWordProps->nWordStyle & PVTWORD_STYLE_ITALIC) {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_ITALIC) == 0) {
                  secinfo.WordProps.nWordStyle |= PVTWORD_STYLE_ITALIC;
                  bSet = TRUE;
                }
              } else {
                if ((secinfo.WordProps.nWordStyle & PVTWORD_STYLE_ITALIC) != 0) {
                  secinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_ITALIC;
                  bSet = TRUE;
                }
              }
              break;
            default:
              break;
          }
        }
      }
    }
  
    if (bSet) {
      pIterator->SetSection(secinfo);
  
      if (bAddUndo && m_bEnableUndo) {
        AddEditUndoItem(new CFXEU_SetSecProps(
            this, place, eProps, OldSecinfo.SecProps, OldSecinfo.WordProps,
            secinfo.SecProps, secinfo.WordProps, wr));
      }
    }
  
    pIterator->SetAt(oldplace);
  
    return bSet;
  }
  
  FX_BOOL CFX_Edit::SetWordProps(EDIT_PROPS_E eProps,
                                 const CPVT_WordPlace& place,
                                 const CPVT_WordProps* pWordProps,
                                 const CPVT_WordRange& wr,
                                 FX_BOOL bAddUndo) {
    if (!m_pVT->IsValid() || !m_pVT->IsRichText())
      return FALSE;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    FX_BOOL bSet = FALSE;
    CPVT_Word wordinfo;
    CPVT_Word OldWordinfo;
  
    CPVT_WordPlace oldplace = pIterator->GetAt();
  
    if (pWordProps) {
      pIterator->SetAt(place);
      if (pIterator->GetWord(wordinfo)) {
        if (bAddUndo)
          OldWordinfo = wordinfo;
  
        switch (eProps) {
          case EP_FONTINDEX:
            if (wordinfo.WordProps.nFontIndex != pWordProps->nFontIndex) {
              if (IPVT_FontMap* pFontMap = GetFontMap()) {
                wordinfo.WordProps.nFontIndex = pFontMap->GetWordFontIndex(
                    wordinfo.Word, wordinfo.nCharset, pWordProps->nFontIndex);
              }
              bSet = TRUE;
            }
            break;
          case EP_FONTSIZE:
            if (!FX_EDIT_IsFloatEqual(wordinfo.WordProps.fFontSize,
                                      pWordProps->fFontSize)) {
              wordinfo.WordProps.fFontSize = pWordProps->fFontSize;
              bSet = TRUE;
            }
            break;
          case EP_WORDCOLOR:
            if (wordinfo.WordProps.dwWordColor != pWordProps->dwWordColor) {
              wordinfo.WordProps.dwWordColor = pWordProps->dwWordColor;
              bSet = TRUE;
            }
            break;
          case EP_SCRIPTTYPE:
            if (wordinfo.WordProps.nScriptType != pWordProps->nScriptType) {
              wordinfo.WordProps.nScriptType = pWordProps->nScriptType;
              bSet = TRUE;
            }
            break;
          case EP_CHARSPACE:
            if (!FX_EDIT_IsFloatEqual(wordinfo.WordProps.fCharSpace,
                                      pWordProps->fCharSpace)) {
              wordinfo.WordProps.fCharSpace = pWordProps->fCharSpace;
              bSet = TRUE;
            }
            break;
          case EP_HORZSCALE:
            if (wordinfo.WordProps.nHorzScale != pWordProps->nHorzScale) {
              wordinfo.WordProps.nHorzScale = pWordProps->nHorzScale;
              bSet = TRUE;
            }
            break;
          case EP_UNDERLINE:
            if (pWordProps->nWordStyle & PVTWORD_STYLE_UNDERLINE) {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_UNDERLINE) ==
                  0) {
                wordinfo.WordProps.nWordStyle |= PVTWORD_STYLE_UNDERLINE;
                bSet = TRUE;
              }
            } else {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_UNDERLINE) !=
                  0) {
                wordinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_UNDERLINE;
                bSet = TRUE;
              }
            }
            break;
          case EP_CROSSOUT:
            if (pWordProps->nWordStyle & PVTWORD_STYLE_CROSSOUT) {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_CROSSOUT) == 0) {
                wordinfo.WordProps.nWordStyle |= PVTWORD_STYLE_CROSSOUT;
                bSet = TRUE;
              }
            } else {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_CROSSOUT) != 0) {
                wordinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_CROSSOUT;
                bSet = TRUE;
              }
            }
            break;
          case EP_BOLD:
            if (pWordProps->nWordStyle & PVTWORD_STYLE_BOLD) {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_BOLD) == 0) {
                wordinfo.WordProps.nWordStyle |= PVTWORD_STYLE_BOLD;
                bSet = TRUE;
              }
            } else {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_BOLD) != 0) {
                wordinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_BOLD;
                bSet = TRUE;
              }
            }
            break;
          case EP_ITALIC:
            if (pWordProps->nWordStyle & PVTWORD_STYLE_ITALIC) {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_ITALIC) == 0) {
                wordinfo.WordProps.nWordStyle |= PVTWORD_STYLE_ITALIC;
                bSet = TRUE;
              }
            } else {
              if ((wordinfo.WordProps.nWordStyle & PVTWORD_STYLE_ITALIC) != 0) {
                wordinfo.WordProps.nWordStyle &= ~PVTWORD_STYLE_ITALIC;
                bSet = TRUE;
              }
            }
            break;
          default:
            break;
        }
      }
    }
  
    if (bSet) {
      pIterator->SetWord(wordinfo);
  
      if (bAddUndo && m_bEnableUndo) {
        AddEditUndoItem(new CFXEU_SetWordProps(
            this, place, eProps, OldWordinfo.WordProps, wordinfo.WordProps, wr));
      }
    }
  
    pIterator->SetAt(oldplace);
    return bSet;
  }
  
  void CFX_Edit::SetText(const FX_WCHAR* text,
                         int32_t charset,
                         const CPVT_SecProps* pSecProps,
                         const CPVT_WordProps* pWordProps) {
    SetText(text, charset, pSecProps, pWordProps, TRUE, TRUE);
  }
  
  FX_BOOL CFX_Edit::InsertWord(uint16_t word,
                               int32_t charset,
                               const CPVT_WordProps* pWordProps) {
    return InsertWord(word, charset, pWordProps, TRUE, TRUE);
  }
  
  FX_BOOL CFX_Edit::InsertReturn(const CPVT_SecProps* pSecProps,
                                 const CPVT_WordProps* pWordProps) {
    return InsertReturn(pSecProps, pWordProps, TRUE, TRUE);
  }
  
  FX_BOOL CFX_Edit::Backspace() {
    return Backspace(TRUE, TRUE);
  }
  
  FX_BOOL CFX_Edit::Delete() {
    return Delete(TRUE, TRUE);
  }
  
  FX_BOOL CFX_Edit::Clear() {
    return Clear(TRUE, TRUE);
  }
  
  FX_BOOL CFX_Edit::InsertText(const FX_WCHAR* text,
                               int32_t charset,
                               const CPVT_SecProps* pSecProps,
                               const CPVT_WordProps* pWordProps) {
    return InsertText(text, charset, pSecProps, pWordProps, TRUE, TRUE);
  }
  
  FX_FLOAT CFX_Edit::GetFontSize() const {
    return m_pVT->GetFontSize();
  }
  
  uint16_t CFX_Edit::GetPasswordChar() const {
    return m_pVT->GetPasswordChar();
  }
  
  int32_t CFX_Edit::GetCharArray() const {
    return m_pVT->GetCharArray();
  }
  
  CFX_FloatRect CFX_Edit::GetPlateRect() const {
    return m_pVT->GetPlateRect();
  }
  
  CFX_FloatRect CFX_Edit::GetContentRect() const {
    return VTToEdit(m_pVT->GetContentRect());
  }
  
  int32_t CFX_Edit::GetHorzScale() const {
    return m_pVT->GetHorzScale();
  }
  
  FX_FLOAT CFX_Edit::GetCharSpace() const {
    return m_pVT->GetCharSpace();
  }
  
  CPVT_WordRange CFX_Edit::GetWholeWordRange() const {
    if (m_pVT->IsValid())
      return CPVT_WordRange(m_pVT->GetBeginWordPlace(), m_pVT->GetEndWordPlace());
  
    return CPVT_WordRange();
  }
  
  CPVT_WordRange CFX_Edit::GetVisibleWordRange() const {
    if (m_bEnableOverflow)
      return GetWholeWordRange();
  
    if (m_pVT->IsValid()) {
      CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
  
      CPVT_WordPlace place1 = m_pVT->SearchWordPlace(
          EditToVT(CFX_FloatPoint(rcPlate.left, rcPlate.top)));
      CPVT_WordPlace place2 = m_pVT->SearchWordPlace(
          EditToVT(CFX_FloatPoint(rcPlate.right, rcPlate.bottom)));
  
      return CPVT_WordRange(place1, place2);
    }
  
    return CPVT_WordRange();
  }
  
  CPVT_WordPlace CFX_Edit::SearchWordPlace(const CFX_FloatPoint& point) const {
    if (m_pVT->IsValid()) {
      return m_pVT->SearchWordPlace(EditToVT(point));
    }
  
    return CPVT_WordPlace();
  }
  
  void CFX_Edit::Paint() {
    if (m_pVT->IsValid()) {
      RearrangeAll();
      ScrollToCaret();
      Refresh(RP_NOANALYSE);
      SetCaretOrigin();
      SetCaretInfo();
    }
  }
  
  void CFX_Edit::RearrangeAll() {
    if (m_pVT->IsValid()) {
      m_pVT->UpdateWordPlace(m_wpCaret);
      m_pVT->RearrangeAll();
      m_pVT->UpdateWordPlace(m_wpCaret);
      SetScrollInfo();
      SetContentChanged();
    }
  }
  
  void CFX_Edit::RearrangePart(const CPVT_WordRange& range) {
    if (m_pVT->IsValid()) {
      m_pVT->UpdateWordPlace(m_wpCaret);
      m_pVT->RearrangePart(range);
      m_pVT->UpdateWordPlace(m_wpCaret);
      SetScrollInfo();
      SetContentChanged();
    }
  }
  
  void CFX_Edit::SetContentChanged() {
    if (m_bNotify && m_pNotify) {
      CFX_FloatRect rcContent = m_pVT->GetContentRect();
      if (rcContent.Width() != m_rcOldContent.Width() ||
          rcContent.Height() != m_rcOldContent.Height()) {
        if (!m_bNotifyFlag) {
          m_bNotifyFlag = TRUE;
          m_pNotify->IOnContentChange(rcContent);
          m_bNotifyFlag = FALSE;
        }
        m_rcOldContent = rcContent;
      }
    }
  }
  
  void CFX_Edit::SelectAll() {
    if (m_pVT->IsValid()) {
      m_SelState = CFX_Edit_Select(GetWholeWordRange());
      SetCaret(m_SelState.EndPos);
  
      ScrollToCaret();
      CPVT_WordRange wrVisible = GetVisibleWordRange();
      Refresh(RP_OPTIONAL, &wrVisible);
      SetCaretInfo();
    }
  }
  
  void CFX_Edit::SelectNone() {
    if (m_pVT->IsValid()) {
      if (m_SelState.IsExist()) {
        CPVT_WordRange wrTemp = m_SelState.ConvertToWordRange();
        m_SelState.Default();
        Refresh(RP_OPTIONAL, &wrTemp);
      }
    }
  }
  
  FX_BOOL CFX_Edit::IsSelected() const {
    return m_SelState.IsExist();
  }
  
  CFX_FloatPoint CFX_Edit::VTToEdit(const CFX_FloatPoint& point) const {
    CFX_FloatRect rcContent = m_pVT->GetContentRect();
    CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
  
    FX_FLOAT fPadding = 0.0f;
  
    switch (m_nAlignment) {
      case 0:
        fPadding = 0.0f;
        break;
      case 1:
        fPadding = (rcPlate.Height() - rcContent.Height()) * 0.5f;
        break;
      case 2:
        fPadding = rcPlate.Height() - rcContent.Height();
        break;
    }
  
    return CFX_FloatPoint(point.x - (m_ptScrollPos.x - rcPlate.left),
                          point.y - (m_ptScrollPos.y + fPadding - rcPlate.top));
  }
  
  CFX_FloatPoint CFX_Edit::EditToVT(const CFX_FloatPoint& point) const {
    CFX_FloatRect rcContent = m_pVT->GetContentRect();
    CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
  
    FX_FLOAT fPadding = 0.0f;
  
    switch (m_nAlignment) {
      case 0:
        fPadding = 0.0f;
        break;
      case 1:
        fPadding = (rcPlate.Height() - rcContent.Height()) * 0.5f;
        break;
      case 2:
        fPadding = rcPlate.Height() - rcContent.Height();
        break;
    }
  
    return CFX_FloatPoint(point.x + (m_ptScrollPos.x - rcPlate.left),
                          point.y + (m_ptScrollPos.y + fPadding - rcPlate.top));
  }
  
  CFX_FloatRect CFX_Edit::VTToEdit(const CFX_FloatRect& rect) const {
    CFX_FloatPoint ptLeftBottom =
        VTToEdit(CFX_FloatPoint(rect.left, rect.bottom));
    CFX_FloatPoint ptRightTop = VTToEdit(CFX_FloatPoint(rect.right, rect.top));
  
    return CFX_FloatRect(ptLeftBottom.x, ptLeftBottom.y, ptRightTop.x,
                         ptRightTop.y);
  }
  
  CFX_FloatRect CFX_Edit::EditToVT(const CFX_FloatRect& rect) const {
    CFX_FloatPoint ptLeftBottom =
        EditToVT(CFX_FloatPoint(rect.left, rect.bottom));
    CFX_FloatPoint ptRightTop = EditToVT(CFX_FloatPoint(rect.right, rect.top));
  
    return CFX_FloatRect(ptLeftBottom.x, ptLeftBottom.y, ptRightTop.x,
                         ptRightTop.y);
  }
  
  void CFX_Edit::SetScrollInfo() {
    if (m_bNotify && m_pNotify) {
      CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
      CFX_FloatRect rcContent = m_pVT->GetContentRect();
  
      if (!m_bNotifyFlag) {
        m_bNotifyFlag = TRUE;
        m_pNotify->IOnSetScrollInfoX(rcPlate.left, rcPlate.right, rcContent.left,
                                     rcContent.right, rcPlate.Width() / 3,
                                     rcPlate.Width());
  
        m_pNotify->IOnSetScrollInfoY(rcPlate.bottom, rcPlate.top,
                                     rcContent.bottom, rcContent.top,
                                     rcPlate.Height() / 3, rcPlate.Height());
        m_bNotifyFlag = FALSE;
      }
    }
  }
  
  void CFX_Edit::SetScrollPosX(FX_FLOAT fx) {
    if (!m_bEnableScroll)
      return;
  
    if (m_pVT->IsValid()) {
      if (!FX_EDIT_IsFloatEqual(m_ptScrollPos.x, fx)) {
        m_ptScrollPos.x = fx;
        Refresh(RP_NOANALYSE);
  
        if (m_bNotify && m_pNotify) {
          if (!m_bNotifyFlag) {
            m_bNotifyFlag = TRUE;
            m_pNotify->IOnSetScrollPosX(fx);
            m_bNotifyFlag = FALSE;
          }
        }
      }
    }
  }
  
  void CFX_Edit::SetScrollPosY(FX_FLOAT fy) {
    if (!m_bEnableScroll)
      return;
  
    if (m_pVT->IsValid()) {
      if (!FX_EDIT_IsFloatEqual(m_ptScrollPos.y, fy)) {
        m_ptScrollPos.y = fy;
        Refresh(RP_NOANALYSE);
  
        if (m_bNotify && m_pNotify) {
          if (!m_bNotifyFlag) {
            m_bNotifyFlag = TRUE;
            m_pNotify->IOnSetScrollPosY(fy);
            m_bNotifyFlag = FALSE;
          }
        }
      }
    }
  }
  
  void CFX_Edit::SetScrollPos(const CFX_FloatPoint& point) {
    SetScrollPosX(point.x);
    SetScrollPosY(point.y);
    SetScrollLimit();
    SetCaretInfo();
  }
  
  CFX_FloatPoint CFX_Edit::GetScrollPos() const {
    return m_ptScrollPos;
  }
  
  void CFX_Edit::SetScrollLimit() {
    if (m_pVT->IsValid()) {
      CFX_FloatRect rcContent = m_pVT->GetContentRect();
      CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
  
      if (rcPlate.Width() > rcContent.Width()) {
        SetScrollPosX(rcPlate.left);
      } else {
        if (FX_EDIT_IsFloatSmaller(m_ptScrollPos.x, rcContent.left)) {
          SetScrollPosX(rcContent.left);
        } else if (FX_EDIT_IsFloatBigger(m_ptScrollPos.x,
                                         rcContent.right - rcPlate.Width())) {
          SetScrollPosX(rcContent.right - rcPlate.Width());
        }
      }
  
      if (rcPlate.Height() > rcContent.Height()) {
        SetScrollPosY(rcPlate.top);
      } else {
        if (FX_EDIT_IsFloatSmaller(m_ptScrollPos.y,
                                   rcContent.bottom + rcPlate.Height())) {
          SetScrollPosY(rcContent.bottom + rcPlate.Height());
        } else if (FX_EDIT_IsFloatBigger(m_ptScrollPos.y, rcContent.top)) {
          SetScrollPosY(rcContent.top);
        }
      }
    }
  }
  
  void CFX_Edit::ScrollToCaret() {
    SetScrollLimit();
  
    if (!m_pVT->IsValid())
      return;
  
    CFX_FloatPoint ptHead(0, 0);
    CFX_FloatPoint ptFoot(0, 0);
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    pIterator->SetAt(m_wpCaret);
  
    CPVT_Word word;
    CPVT_Line line;
    if (pIterator->GetWord(word)) {
      ptHead.x = word.ptWord.x + word.fWidth;
      ptHead.y = word.ptWord.y + word.fAscent;
      ptFoot.x = word.ptWord.x + word.fWidth;
      ptFoot.y = word.ptWord.y + word.fDescent;
    } else if (pIterator->GetLine(line)) {
      ptHead.x = line.ptLine.x;
      ptHead.y = line.ptLine.y + line.fLineAscent;
      ptFoot.x = line.ptLine.x;
      ptFoot.y = line.ptLine.y + line.fLineDescent;
    }
  
    CFX_FloatPoint ptHeadEdit = VTToEdit(ptHead);
    CFX_FloatPoint ptFootEdit = VTToEdit(ptFoot);
  
    CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
  
    if (!FX_EDIT_IsFloatEqual(rcPlate.left, rcPlate.right)) {
      if (FX_EDIT_IsFloatSmaller(ptHeadEdit.x, rcPlate.left) ||
          FX_EDIT_IsFloatEqual(ptHeadEdit.x, rcPlate.left)) {
        SetScrollPosX(ptHead.x);
      } else if (FX_EDIT_IsFloatBigger(ptHeadEdit.x, rcPlate.right)) {
        SetScrollPosX(ptHead.x - rcPlate.Width());
      }
    }
  
    if (!FX_EDIT_IsFloatEqual(rcPlate.top, rcPlate.bottom)) {
      if (FX_EDIT_IsFloatSmaller(ptFootEdit.y, rcPlate.bottom) ||
          FX_EDIT_IsFloatEqual(ptFootEdit.y, rcPlate.bottom)) {
        if (FX_EDIT_IsFloatSmaller(ptHeadEdit.y, rcPlate.top)) {
          SetScrollPosY(ptFoot.y + rcPlate.Height());
        }
      } else if (FX_EDIT_IsFloatBigger(ptHeadEdit.y, rcPlate.top)) {
        if (FX_EDIT_IsFloatBigger(ptFootEdit.y, rcPlate.bottom)) {
          SetScrollPosY(ptHead.y);
        }
      }
    }
  }
  
  void CFX_Edit::Refresh(REFRESH_PLAN_E ePlan,
                         const CPVT_WordRange* pRange1,
                         const CPVT_WordRange* pRange2) {
    if (m_bEnableRefresh && m_pVT->IsValid()) {
      m_Refresh.BeginRefresh();
      RefreshPushLineRects(GetVisibleWordRange());
  
      m_Refresh.NoAnalyse();
      m_ptRefreshScrollPos = m_ptScrollPos;
  
      if (m_bNotify && m_pNotify) {
        if (!m_bNotifyFlag) {
          m_bNotifyFlag = TRUE;
          if (const CFX_Edit_RectArray* pRects = m_Refresh.GetRefreshRects()) {
            for (int32_t i = 0, sz = pRects->GetSize(); i < sz; i++)
              m_pNotify->IOnInvalidateRect(pRects->GetAt(i));
          }
          m_bNotifyFlag = FALSE;
        }
      }
  
      m_Refresh.EndRefresh();
    }
  }
  
  void CFX_Edit::RefreshPushLineRects(const CPVT_WordRange& wr) {
    if (!m_pVT->IsValid())
      return;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    CPVT_WordPlace wpBegin = wr.BeginPos;
    m_pVT->UpdateWordPlace(wpBegin);
    CPVT_WordPlace wpEnd = wr.EndPos;
    m_pVT->UpdateWordPlace(wpEnd);
    pIterator->SetAt(wpBegin);
  
    CPVT_Line lineinfo;
    do {
      if (!pIterator->GetLine(lineinfo))
        break;
      if (lineinfo.lineplace.LineCmp(wpEnd) > 0)
        break;
  
      CFX_FloatRect rcLine(lineinfo.ptLine.x,
                           lineinfo.ptLine.y + lineinfo.fLineDescent,
                           lineinfo.ptLine.x + lineinfo.fLineWidth,
                           lineinfo.ptLine.y + lineinfo.fLineAscent);
  
      m_Refresh.Push(CPVT_WordRange(lineinfo.lineplace, lineinfo.lineEnd),
                     VTToEdit(rcLine));
    } while (pIterator->NextLine());
  }
  
  void CFX_Edit::RefreshPushRandomRects(const CPVT_WordRange& wr) {
    if (!m_pVT->IsValid())
      return;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    CPVT_WordRange wrTemp = wr;
  
    m_pVT->UpdateWordPlace(wrTemp.BeginPos);
    m_pVT->UpdateWordPlace(wrTemp.EndPos);
    pIterator->SetAt(wrTemp.BeginPos);
  
    CPVT_Word wordinfo;
    CPVT_Line lineinfo;
    CPVT_WordPlace place;
  
    while (pIterator->NextWord()) {
      place = pIterator->GetAt();
      if (place.WordCmp(wrTemp.EndPos) > 0)
        break;
  
      pIterator->GetWord(wordinfo);
      pIterator->GetLine(lineinfo);
  
      if (place.LineCmp(wrTemp.BeginPos) == 0 ||
          place.LineCmp(wrTemp.EndPos) == 0) {
        CFX_FloatRect rcWord(wordinfo.ptWord.x,
                             lineinfo.ptLine.y + lineinfo.fLineDescent,
                             wordinfo.ptWord.x + wordinfo.fWidth,
                             lineinfo.ptLine.y + lineinfo.fLineAscent);
  
        m_Refresh.AddRefresh(VTToEdit(rcWord));
      } else {
        CFX_FloatRect rcLine(lineinfo.ptLine.x,
                             lineinfo.ptLine.y + lineinfo.fLineDescent,
                             lineinfo.ptLine.x + lineinfo.fLineWidth,
                             lineinfo.ptLine.y + lineinfo.fLineAscent);
  
        m_Refresh.AddRefresh(VTToEdit(rcLine));
  
        pIterator->NextLine();
      }
    }
  }
  
  void CFX_Edit::RefreshWordRange(const CPVT_WordRange& wr) {
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    CPVT_WordRange wrTemp = wr;
  
    m_pVT->UpdateWordPlace(wrTemp.BeginPos);
    m_pVT->UpdateWordPlace(wrTemp.EndPos);
    pIterator->SetAt(wrTemp.BeginPos);
  
    CPVT_Word wordinfo;
    CPVT_Line lineinfo;
    CPVT_WordPlace place;
  
    while (pIterator->NextWord()) {
      place = pIterator->GetAt();
      if (place.WordCmp(wrTemp.EndPos) > 0)
        break;
  
      pIterator->GetWord(wordinfo);
      pIterator->GetLine(lineinfo);
  
      if (place.LineCmp(wrTemp.BeginPos) == 0 ||
          place.LineCmp(wrTemp.EndPos) == 0) {
        CFX_FloatRect rcWord(wordinfo.ptWord.x,
                             lineinfo.ptLine.y + lineinfo.fLineDescent,
                             wordinfo.ptWord.x + wordinfo.fWidth,
                             lineinfo.ptLine.y + lineinfo.fLineAscent);
  
        if (m_bNotify && m_pNotify) {
          if (!m_bNotifyFlag) {
            m_bNotifyFlag = TRUE;
            CFX_FloatRect rcRefresh = VTToEdit(rcWord);
            m_pNotify->IOnInvalidateRect(&rcRefresh);
            m_bNotifyFlag = FALSE;
          }
        }
      } else {
        CFX_FloatRect rcLine(lineinfo.ptLine.x,
                             lineinfo.ptLine.y + lineinfo.fLineDescent,
                             lineinfo.ptLine.x + lineinfo.fLineWidth,
                             lineinfo.ptLine.y + lineinfo.fLineAscent);
  
        if (m_bNotify && m_pNotify) {
          if (!m_bNotifyFlag) {
            m_bNotifyFlag = TRUE;
            CFX_FloatRect rcRefresh = VTToEdit(rcLine);
            m_pNotify->IOnInvalidateRect(&rcRefresh);
            m_bNotifyFlag = FALSE;
          }
        }
  
        pIterator->NextLine();
      }
    }
  }
  
  void CFX_Edit::SetCaret(const CPVT_WordPlace& place) {
    m_wpOldCaret = m_wpCaret;
    m_wpCaret = place;
  }
  
  void CFX_Edit::SetCaretInfo() {
    if (m_bNotify && m_pNotify) {
      if (!m_bNotifyFlag) {
        CFX_FloatPoint ptHead(0.0f, 0.0f), ptFoot(0.0f, 0.0f);
  
        CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
        pIterator->SetAt(m_wpCaret);
        CPVT_Word word;
        CPVT_Line line;
        if (pIterator->GetWord(word)) {
          ptHead.x = word.ptWord.x + word.fWidth;
          ptHead.y = word.ptWord.y + word.fAscent;
          ptFoot.x = word.ptWord.x + word.fWidth;
          ptFoot.y = word.ptWord.y + word.fDescent;
        } else if (pIterator->GetLine(line)) {
          ptHead.x = line.ptLine.x;
          ptHead.y = line.ptLine.y + line.fLineAscent;
          ptFoot.x = line.ptLine.x;
          ptFoot.y = line.ptLine.y + line.fLineDescent;
        }
  
        m_bNotifyFlag = TRUE;
        m_pNotify->IOnSetCaret(!m_SelState.IsExist(), VTToEdit(ptHead),
                               VTToEdit(ptFoot), m_wpCaret);
        m_bNotifyFlag = FALSE;
      }
    }
  
    SetCaretChange();
  }
  
  void CFX_Edit::SetCaretChange() {
    if (m_wpCaret == m_wpOldCaret)
      return;
  
    if (!m_bNotify || !m_pVT->IsRichText() || !m_pNotify)
      return;
  
    CPVT_SecProps SecProps;
    CPVT_WordProps WordProps;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    pIterator->SetAt(m_wpCaret);
    CPVT_Word word;
    CPVT_Section section;
  
    if (pIterator->GetSection(section)) {
      SecProps = section.SecProps;
      WordProps = section.WordProps;
    }
  
    if (pIterator->GetWord(word))
      WordProps = word.WordProps;
  
    if (!m_bNotifyFlag) {
      m_bNotifyFlag = TRUE;
      m_pNotify->IOnCaretChange(SecProps, WordProps);
      m_bNotifyFlag = FALSE;
    }
  }
  
  void CFX_Edit::SetCaret(int32_t nPos) {
    if (m_pVT->IsValid()) {
      SelectNone();
      SetCaret(m_pVT->WordIndexToWordPlace(nPos));
      m_SelState.Set(m_wpCaret, m_wpCaret);
  
      ScrollToCaret();
      SetCaretOrigin();
      SetCaretInfo();
    }
  }
  
  void CFX_Edit::OnMouseDown(const CFX_FloatPoint& point,
                             FX_BOOL bShift,
                             FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      SelectNone();
      SetCaret(m_pVT->SearchWordPlace(EditToVT(point)));
      m_SelState.Set(m_wpCaret, m_wpCaret);
  
      ScrollToCaret();
      SetCaretOrigin();
      SetCaretInfo();
    }
  }
  
  void CFX_Edit::OnMouseMove(const CFX_FloatPoint& point,
                             FX_BOOL bShift,
                             FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      SetCaret(m_pVT->SearchWordPlace(EditToVT(point)));
  
      if (m_wpCaret != m_wpOldCaret) {
        m_SelState.SetEndPos(m_wpCaret);
  
        ScrollToCaret();
        CPVT_WordRange wr(m_wpOldCaret, m_wpCaret);
        Refresh(RP_OPTIONAL, &wr);
        SetCaretOrigin();
        SetCaretInfo();
      }
    }
  }
  
  void CFX_Edit::OnVK_UP(FX_BOOL bShift, FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      SetCaret(m_pVT->GetUpWordPlace(m_wpCaret, m_ptCaret));
  
      if (bShift) {
        if (m_SelState.IsExist())
          m_SelState.SetEndPos(m_wpCaret);
        else
          m_SelState.Set(m_wpOldCaret, m_wpCaret);
  
        if (m_wpOldCaret != m_wpCaret) {
          ScrollToCaret();
          CPVT_WordRange wr(m_wpOldCaret, m_wpCaret);
          Refresh(RP_OPTIONAL, &wr);
          SetCaretInfo();
        }
      } else {
        SelectNone();
  
        ScrollToCaret();
        SetCaretInfo();
      }
    }
  }
  
  void CFX_Edit::OnVK_DOWN(FX_BOOL bShift, FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      SetCaret(m_pVT->GetDownWordPlace(m_wpCaret, m_ptCaret));
  
      if (bShift) {
        if (m_SelState.IsExist())
          m_SelState.SetEndPos(m_wpCaret);
        else
          m_SelState.Set(m_wpOldCaret, m_wpCaret);
  
        if (m_wpOldCaret != m_wpCaret) {
          ScrollToCaret();
          CPVT_WordRange wr(m_wpOldCaret, m_wpCaret);
          Refresh(RP_OPTIONAL, &wr);
          SetCaretInfo();
        }
      } else {
        SelectNone();
  
        ScrollToCaret();
        SetCaretInfo();
      }
    }
  }
  
  void CFX_Edit::OnVK_LEFT(FX_BOOL bShift, FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      if (bShift) {
        if (m_wpCaret == m_pVT->GetLineBeginPlace(m_wpCaret) &&
            m_wpCaret != m_pVT->GetSectionBeginPlace(m_wpCaret))
          SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
  
        SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
  
        if (m_SelState.IsExist())
          m_SelState.SetEndPos(m_wpCaret);
        else
          m_SelState.Set(m_wpOldCaret, m_wpCaret);
  
        if (m_wpOldCaret != m_wpCaret) {
          ScrollToCaret();
          CPVT_WordRange wr(m_wpOldCaret, m_wpCaret);
          Refresh(RP_OPTIONAL, &wr);
          SetCaretInfo();
        }
      } else {
        if (m_SelState.IsExist()) {
          if (m_SelState.BeginPos.WordCmp(m_SelState.EndPos) < 0)
            SetCaret(m_SelState.BeginPos);
          else
            SetCaret(m_SelState.EndPos);
  
          SelectNone();
          ScrollToCaret();
          SetCaretInfo();
        } else {
          if (m_wpCaret == m_pVT->GetLineBeginPlace(m_wpCaret) &&
              m_wpCaret != m_pVT->GetSectionBeginPlace(m_wpCaret))
            SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
  
          SetCaret(m_pVT->GetPrevWordPlace(m_wpCaret));
  
          ScrollToCaret();
          SetCaretOrigin();
          SetCaretInfo();
        }
      }
    }
  }
  
  void CFX_Edit::OnVK_RIGHT(FX_BOOL bShift, FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      if (bShift) {
        SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
  
        if (m_wpCaret == m_pVT->GetLineEndPlace(m_wpCaret) &&
            m_wpCaret != m_pVT->GetSectionEndPlace(m_wpCaret))
          SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
  
        if (m_SelState.IsExist())
          m_SelState.SetEndPos(m_wpCaret);
        else
          m_SelState.Set(m_wpOldCaret, m_wpCaret);
  
        if (m_wpOldCaret != m_wpCaret) {
          ScrollToCaret();
          CPVT_WordRange wr(m_wpOldCaret, m_wpCaret);
          Refresh(RP_OPTIONAL, &wr);
          SetCaretInfo();
        }
      } else {
        if (m_SelState.IsExist()) {
          if (m_SelState.BeginPos.WordCmp(m_SelState.EndPos) > 0)
            SetCaret(m_SelState.BeginPos);
          else
            SetCaret(m_SelState.EndPos);
  
          SelectNone();
          ScrollToCaret();
          SetCaretInfo();
        } else {
          SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
  
          if (m_wpCaret == m_pVT->GetLineEndPlace(m_wpCaret) &&
              m_wpCaret != m_pVT->GetSectionEndPlace(m_wpCaret))
            SetCaret(m_pVT->GetNextWordPlace(m_wpCaret));
  
          ScrollToCaret();
          SetCaretOrigin();
          SetCaretInfo();
        }
      }
    }
  }
  
  void CFX_Edit::OnVK_HOME(FX_BOOL bShift, FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      if (bShift) {
        if (bCtrl)
          SetCaret(m_pVT->GetBeginWordPlace());
        else
          SetCaret(m_pVT->GetLineBeginPlace(m_wpCaret));
  
        if (m_SelState.IsExist())
          m_SelState.SetEndPos(m_wpCaret);
        else
          m_SelState.Set(m_wpOldCaret, m_wpCaret);
  
        ScrollToCaret();
        CPVT_WordRange wr(m_wpOldCaret, m_wpCaret);
        Refresh(RP_OPTIONAL, &wr);
        SetCaretInfo();
      } else {
        if (m_SelState.IsExist()) {
          if (m_SelState.BeginPos.WordCmp(m_SelState.EndPos) < 0)
            SetCaret(m_SelState.BeginPos);
          else
            SetCaret(m_SelState.EndPos);
  
          SelectNone();
          ScrollToCaret();
          SetCaretInfo();
        } else {
          if (bCtrl)
            SetCaret(m_pVT->GetBeginWordPlace());
          else
            SetCaret(m_pVT->GetLineBeginPlace(m_wpCaret));
  
          ScrollToCaret();
          SetCaretOrigin();
          SetCaretInfo();
        }
      }
    }
  }
  
  void CFX_Edit::OnVK_END(FX_BOOL bShift, FX_BOOL bCtrl) {
    if (m_pVT->IsValid()) {
      if (bShift) {
        if (bCtrl)
          SetCaret(m_pVT->GetEndWordPlace());
        else
          SetCaret(m_pVT->GetLineEndPlace(m_wpCaret));
  
        if (m_SelState.IsExist())
          m_SelState.SetEndPos(m_wpCaret);
        else
          m_SelState.Set(m_wpOldCaret, m_wpCaret);
  
        ScrollToCaret();
        CPVT_WordRange wr(m_wpOldCaret, m_wpCaret);
        Refresh(RP_OPTIONAL, &wr);
        SetCaretInfo();
      } else {
        if (m_SelState.IsExist()) {
          if (m_SelState.BeginPos.WordCmp(m_SelState.EndPos) > 0)
            SetCaret(m_SelState.BeginPos);
          else
            SetCaret(m_SelState.EndPos);
  
          SelectNone();
          ScrollToCaret();
          SetCaretInfo();
        } else {
          if (bCtrl)
            SetCaret(m_pVT->GetEndWordPlace());
          else
            SetCaret(m_pVT->GetLineEndPlace(m_wpCaret));
  
          ScrollToCaret();
          SetCaretOrigin();
          SetCaretInfo();
        }
      }
    }
  }
  
  void CFX_Edit::SetText(const FX_WCHAR* text,
                         int32_t charset,
                         const CPVT_SecProps* pSecProps,
                         const CPVT_WordProps* pWordProps,
                         FX_BOOL bAddUndo,
                         FX_BOOL bPaint) {
    Empty();
    DoInsertText(CPVT_WordPlace(0, 0, -1), text, charset, pSecProps, pWordProps);
    if (bPaint)
      Paint();
    if (m_bOprNotify && m_pOprNotify)
      m_pOprNotify->OnSetText(m_wpCaret, m_wpOldCaret);
  }
  
  FX_BOOL CFX_Edit::InsertWord(uint16_t word,
                               int32_t charset,
                               const CPVT_WordProps* pWordProps,
                               FX_BOOL bAddUndo,
                               FX_BOOL bPaint) {
    if (IsTextOverflow())
      return FALSE;
  
    if (m_pVT->IsValid()) {
      m_pVT->UpdateWordPlace(m_wpCaret);
  
      SetCaret(m_pVT->InsertWord(
          m_wpCaret, word, GetCharSetFromUnicode(word, charset), pWordProps));
      m_SelState.Set(m_wpCaret, m_wpCaret);
  
      if (m_wpCaret != m_wpOldCaret) {
        if (bAddUndo && m_bEnableUndo) {
          AddEditUndoItem(new CFXEU_InsertWord(this, m_wpOldCaret, m_wpCaret,
                                               word, charset, pWordProps));
        }
  
        if (bPaint)
          PaintInsertText(m_wpOldCaret, m_wpCaret);
  
        if (m_bOprNotify && m_pOprNotify)
          m_pOprNotify->OnInsertWord(m_wpCaret, m_wpOldCaret);
  
        return TRUE;
      }
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::InsertReturn(const CPVT_SecProps* pSecProps,
                                 const CPVT_WordProps* pWordProps,
                                 FX_BOOL bAddUndo,
                                 FX_BOOL bPaint) {
    if (IsTextOverflow())
      return FALSE;
  
    if (m_pVT->IsValid()) {
      m_pVT->UpdateWordPlace(m_wpCaret);
      SetCaret(m_pVT->InsertSection(m_wpCaret, pSecProps, pWordProps));
      m_SelState.Set(m_wpCaret, m_wpCaret);
  
      if (m_wpCaret != m_wpOldCaret) {
        if (bAddUndo && m_bEnableUndo) {
          AddEditUndoItem(new CFXEU_InsertReturn(this, m_wpOldCaret, m_wpCaret,
                                                 pSecProps, pWordProps));
        }
  
        if (bPaint) {
          RearrangePart(CPVT_WordRange(m_wpOldCaret, m_wpCaret));
          ScrollToCaret();
          CPVT_WordRange wr(m_wpOldCaret, GetVisibleWordRange().EndPos);
          Refresh(RP_ANALYSE, &wr);
          SetCaretOrigin();
          SetCaretInfo();
        }
  
        if (m_bOprNotify && m_pOprNotify)
          m_pOprNotify->OnInsertReturn(m_wpCaret, m_wpOldCaret);
  
        return TRUE;
      }
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::Backspace(FX_BOOL bAddUndo, FX_BOOL bPaint) {
    if (m_pVT->IsValid()) {
      if (m_wpCaret == m_pVT->GetBeginWordPlace())
        return FALSE;
  
      CPVT_Section section;
      CPVT_Word word;
  
      if (bAddUndo) {
        CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
        pIterator->SetAt(m_wpCaret);
        pIterator->GetSection(section);
        pIterator->GetWord(word);
      }
  
      m_pVT->UpdateWordPlace(m_wpCaret);
      SetCaret(m_pVT->BackSpaceWord(m_wpCaret));
      m_SelState.Set(m_wpCaret, m_wpCaret);
  
      if (m_wpCaret != m_wpOldCaret) {
        if (bAddUndo && m_bEnableUndo) {
          if (m_wpCaret.SecCmp(m_wpOldCaret) != 0)
            AddEditUndoItem(new CFXEU_Backspace(
                this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
                section.SecProps, section.WordProps));
          else
            AddEditUndoItem(new CFXEU_Backspace(
                this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
                section.SecProps, word.WordProps));
        }
  
        if (bPaint) {
          RearrangePart(CPVT_WordRange(m_wpCaret, m_wpOldCaret));
          ScrollToCaret();
  
          CPVT_WordRange wr;
          if (m_wpCaret.SecCmp(m_wpOldCaret) != 0)
            wr = CPVT_WordRange(m_pVT->GetPrevWordPlace(m_wpCaret),
                                GetVisibleWordRange().EndPos);
          else if (m_wpCaret.LineCmp(m_wpOldCaret) != 0)
            wr = CPVT_WordRange(m_pVT->GetLineBeginPlace(m_wpCaret),
                                m_pVT->GetSectionEndPlace(m_wpCaret));
          else
            wr = CPVT_WordRange(m_pVT->GetPrevWordPlace(m_wpCaret),
                                m_pVT->GetSectionEndPlace(m_wpCaret));
  
          Refresh(RP_ANALYSE, &wr);
  
          SetCaretOrigin();
          SetCaretInfo();
        }
  
        if (m_bOprNotify && m_pOprNotify)
          m_pOprNotify->OnBackSpace(m_wpCaret, m_wpOldCaret);
  
        return TRUE;
      }
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::Delete(FX_BOOL bAddUndo, FX_BOOL bPaint) {
    if (m_pVT->IsValid()) {
      if (m_wpCaret == m_pVT->GetEndWordPlace())
        return FALSE;
  
      CPVT_Section section;
      CPVT_Word word;
  
      if (bAddUndo) {
        CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
        pIterator->SetAt(m_pVT->GetNextWordPlace(m_wpCaret));
        pIterator->GetSection(section);
        pIterator->GetWord(word);
      }
  
      m_pVT->UpdateWordPlace(m_wpCaret);
      FX_BOOL bSecEnd = (m_wpCaret == m_pVT->GetSectionEndPlace(m_wpCaret));
  
      SetCaret(m_pVT->DeleteWord(m_wpCaret));
      m_SelState.Set(m_wpCaret, m_wpCaret);
  
      if (bAddUndo && m_bEnableUndo) {
        if (bSecEnd)
          AddEditUndoItem(new CFXEU_Delete(
              this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
              section.SecProps, section.WordProps, bSecEnd));
        else
          AddEditUndoItem(new CFXEU_Delete(
              this, m_wpOldCaret, m_wpCaret, word.Word, word.nCharset,
              section.SecProps, word.WordProps, bSecEnd));
      }
  
      if (bPaint) {
        RearrangePart(CPVT_WordRange(m_wpOldCaret, m_wpCaret));
        ScrollToCaret();
  
        CPVT_WordRange wr;
        if (bSecEnd)
          wr = CPVT_WordRange(m_pVT->GetPrevWordPlace(m_wpOldCaret),
                              GetVisibleWordRange().EndPos);
        else if (m_wpCaret.LineCmp(m_wpOldCaret) != 0)
          wr = CPVT_WordRange(m_pVT->GetLineBeginPlace(m_wpCaret),
                              m_pVT->GetSectionEndPlace(m_wpCaret));
        else
          wr = CPVT_WordRange(m_pVT->GetPrevWordPlace(m_wpOldCaret),
                              m_pVT->GetSectionEndPlace(m_wpCaret));
  
        Refresh(RP_ANALYSE, &wr);
  
        SetCaretOrigin();
        SetCaretInfo();
      }
  
      if (m_bOprNotify && m_pOprNotify)
        m_pOprNotify->OnDelete(m_wpCaret, m_wpOldCaret);
  
      return TRUE;
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::Empty() {
    if (m_pVT->IsValid()) {
      m_pVT->DeleteWords(GetWholeWordRange());
      SetCaret(m_pVT->GetBeginWordPlace());
  
      return TRUE;
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::Clear(FX_BOOL bAddUndo, FX_BOOL bPaint) {
    if (!m_pVT->IsValid())
      return FALSE;
  
    if (!m_SelState.IsExist())
      return FALSE;
  
    CPVT_WordRange range = m_SelState.ConvertToWordRange();
  
    if (bAddUndo && m_bEnableUndo) {
      if (m_pVT->IsRichText()) {
        BeginGroupUndo(L"");
  
        CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
        pIterator->SetAt(range.EndPos);
  
        CPVT_Word wordinfo;
        CPVT_Section secinfo;
        do {
          CPVT_WordPlace place = pIterator->GetAt();
          if (place.WordCmp(range.BeginPos) <= 0)
            break;
  
          CPVT_WordPlace oldplace = m_pVT->GetPrevWordPlace(place);
  
          if (oldplace.SecCmp(place) != 0) {
            if (pIterator->GetSection(secinfo)) {
              AddEditUndoItem(new CFXEU_ClearRich(
                  this, oldplace, place, range, wordinfo.Word, wordinfo.nCharset,
                  secinfo.SecProps, secinfo.WordProps));
            }
          } else {
            if (pIterator->GetWord(wordinfo)) {
              oldplace = m_pVT->AdjustLineHeader(oldplace, TRUE);
              place = m_pVT->AdjustLineHeader(place, TRUE);
  
              AddEditUndoItem(new CFXEU_ClearRich(
                  this, oldplace, place, range, wordinfo.Word, wordinfo.nCharset,
                  secinfo.SecProps, wordinfo.WordProps));
            }
          }
        } while (pIterator->PrevWord());
        EndGroupUndo();
      } else {
        AddEditUndoItem(new CFXEU_Clear(this, range, GetSelText()));
      }
    }
  
    SelectNone();
    SetCaret(m_pVT->DeleteWords(range));
    m_SelState.Set(m_wpCaret, m_wpCaret);
  
    if (bPaint) {
      RearrangePart(range);
      ScrollToCaret();
  
      CPVT_WordRange wr(m_wpOldCaret, GetVisibleWordRange().EndPos);
      Refresh(RP_ANALYSE, &wr);
  
      SetCaretOrigin();
      SetCaretInfo();
    }
  
    if (m_bOprNotify && m_pOprNotify)
      m_pOprNotify->OnClear(m_wpCaret, m_wpOldCaret);
  
    return TRUE;
  }
  
  FX_BOOL CFX_Edit::InsertText(const FX_WCHAR* text,
                               int32_t charset,
                               const CPVT_SecProps* pSecProps,
                               const CPVT_WordProps* pWordProps,
                               FX_BOOL bAddUndo,
                               FX_BOOL bPaint) {
    if (IsTextOverflow())
      return FALSE;
  
    m_pVT->UpdateWordPlace(m_wpCaret);
    SetCaret(DoInsertText(m_wpCaret, text, charset, pSecProps, pWordProps));
    m_SelState.Set(m_wpCaret, m_wpCaret);
  
    if (m_wpCaret != m_wpOldCaret) {
      if (bAddUndo && m_bEnableUndo) {
        AddEditUndoItem(new CFXEU_InsertText(this, m_wpOldCaret, m_wpCaret, text,
                                             charset, pSecProps, pWordProps));
      }
  
      if (bPaint)
        PaintInsertText(m_wpOldCaret, m_wpCaret);
  
      if (m_bOprNotify && m_pOprNotify)
        m_pOprNotify->OnInsertText(m_wpCaret, m_wpOldCaret);
  
      return TRUE;
    }
    return FALSE;
  }
  
  void CFX_Edit::PaintInsertText(const CPVT_WordPlace& wpOld,
                                 const CPVT_WordPlace& wpNew) {
    if (m_pVT->IsValid()) {
      RearrangePart(CPVT_WordRange(wpOld, wpNew));
      ScrollToCaret();
  
      CPVT_WordRange wr;
      if (m_wpCaret.LineCmp(wpOld) != 0)
        wr = CPVT_WordRange(m_pVT->GetLineBeginPlace(wpOld),
                            m_pVT->GetSectionEndPlace(wpNew));
      else
        wr = CPVT_WordRange(wpOld, m_pVT->GetSectionEndPlace(wpNew));
      Refresh(RP_ANALYSE, &wr);
      SetCaretOrigin();
      SetCaretInfo();
    }
  }
  
  FX_BOOL CFX_Edit::Redo() {
    if (m_bEnableUndo) {
      if (m_Undo.CanRedo()) {
        m_Undo.Redo();
        return TRUE;
      }
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::Undo() {
    if (m_bEnableUndo) {
      if (m_Undo.CanUndo()) {
        m_Undo.Undo();
        return TRUE;
      }
    }
  
    return FALSE;
  }
  
  void CFX_Edit::SetCaretOrigin() {
    if (!m_pVT->IsValid())
      return;
  
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    pIterator->SetAt(m_wpCaret);
    CPVT_Word word;
    CPVT_Line line;
    if (pIterator->GetWord(word)) {
      m_ptCaret.x = word.ptWord.x + word.fWidth;
      m_ptCaret.y = word.ptWord.y;
    } else if (pIterator->GetLine(line)) {
      m_ptCaret.x = line.ptLine.x;
      m_ptCaret.y = line.ptLine.y;
    }
  }
  
  int32_t CFX_Edit::WordPlaceToWordIndex(const CPVT_WordPlace& place) const {
    if (m_pVT->IsValid())
      return m_pVT->WordPlaceToWordIndex(place);
  
    return -1;
  }
  
  CPVT_WordPlace CFX_Edit::WordIndexToWordPlace(int32_t index) const {
    if (m_pVT->IsValid())
      return m_pVT->WordIndexToWordPlace(index);
  
    return CPVT_WordPlace();
  }
  
  FX_BOOL CFX_Edit::IsTextFull() const {
    int32_t nTotalWords = m_pVT->GetTotalWords();
    int32_t nLimitChar = m_pVT->GetLimitChar();
    int32_t nCharArray = m_pVT->GetCharArray();
  
    return IsTextOverflow() || (nLimitChar > 0 && nTotalWords >= nLimitChar) ||
           (nCharArray > 0 && nTotalWords >= nCharArray);
  }
  
  FX_BOOL CFX_Edit::IsTextOverflow() const {
    if (!m_bEnableScroll && !m_bEnableOverflow) {
      CFX_FloatRect rcPlate = m_pVT->GetPlateRect();
      CFX_FloatRect rcContent = m_pVT->GetContentRect();
  
      if (m_pVT->IsMultiLine() && GetTotalLines() > 1) {
        if (FX_EDIT_IsFloatBigger(rcContent.Height(), rcPlate.Height()))
          return TRUE;
      }
  
      if (FX_EDIT_IsFloatBigger(rcContent.Width(), rcPlate.Width()))
        return TRUE;
    }
  
    return FALSE;
  }
  
  CPVT_WordPlace CFX_Edit::GetLineBeginPlace(const CPVT_WordPlace& place) const {
    return m_pVT->GetLineBeginPlace(place);
  }
  
  CPVT_WordPlace CFX_Edit::GetLineEndPlace(const CPVT_WordPlace& place) const {
    return m_pVT->GetLineEndPlace(place);
  }
  
  CPVT_WordPlace CFX_Edit::GetSectionBeginPlace(
      const CPVT_WordPlace& place) const {
    return m_pVT->GetSectionBeginPlace(place);
  }
  
  CPVT_WordPlace CFX_Edit::GetSectionEndPlace(const CPVT_WordPlace& place) const {
    return m_pVT->GetSectionEndPlace(place);
  }
  
  FX_BOOL CFX_Edit::CanUndo() const {
    if (m_bEnableUndo) {
      return m_Undo.CanUndo();
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::CanRedo() const {
    if (m_bEnableUndo) {
      return m_Undo.CanRedo();
    }
  
    return FALSE;
  }
  
  FX_BOOL CFX_Edit::IsModified() const {
    if (m_bEnableUndo) {
      return m_Undo.IsModified();
    }
  
    return FALSE;
  }
  
  void CFX_Edit::EnableRefresh(FX_BOOL bRefresh) {
    m_bEnableRefresh = bRefresh;
  }
  
  void CFX_Edit::EnableUndo(FX_BOOL bUndo) {
    m_bEnableUndo = bUndo;
  }
  
  void CFX_Edit::EnableNotify(FX_BOOL bNotify) {
    m_bNotify = bNotify;
  }
  
  void CFX_Edit::EnableOprNotify(FX_BOOL bNotify) {
    m_bOprNotify = bNotify;
  }
  
  FX_FLOAT CFX_Edit::GetLineTop(const CPVT_WordPlace& place) const {
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    CPVT_WordPlace wpOld = pIterator->GetAt();
  
    pIterator->SetAt(place);
    CPVT_Line line;
    pIterator->GetLine(line);
  
    pIterator->SetAt(wpOld);
  
    return line.ptLine.y + line.fLineAscent;
  }
  
  FX_FLOAT CFX_Edit::GetLineBottom(const CPVT_WordPlace& place) const {
    CPDF_VariableText::Iterator* pIterator = m_pVT->GetIterator();
    CPVT_WordPlace wpOld = pIterator->GetAt();
  
    pIterator->SetAt(place);
    CPVT_Line line;
    pIterator->GetLine(line);
  
    pIterator->SetAt(wpOld);
  
    return line.ptLine.y + line.fLineDescent;
  }
  
  CPVT_WordPlace CFX_Edit::DoInsertText(const CPVT_WordPlace& place,
                                        const FX_WCHAR* text,
                                        int32_t charset,
                                        const CPVT_SecProps* pSecProps,
                                        const CPVT_WordProps* pWordProps) {
    CPVT_WordPlace wp = place;
  
    if (m_pVT->IsValid()) {
      CFX_WideString sText = text;
  
      for (int32_t i = 0, sz = sText.GetLength(); i < sz; i++) {
        uint16_t word = sText[i];
        switch (word) {
          case 0x0D:
            wp = m_pVT->InsertSection(wp, pSecProps, pWordProps);
            if (sText[i + 1] == 0x0A)
              i++;
            break;
          case 0x0A:
            wp = m_pVT->InsertSection(wp, pSecProps, pWordProps);
            if (sText[i + 1] == 0x0D)
              i++;
            break;
          case 0x09:
            word = 0x20;
          default:
            wp = m_pVT->InsertWord(wp, word, GetCharSetFromUnicode(word, charset),
                                   pWordProps);
            break;
        }
      }
    }
  
    return wp;
  }
  
  int32_t CFX_Edit::GetCharSetFromUnicode(uint16_t word, int32_t nOldCharset) {
    if (IPVT_FontMap* pFontMap = GetFontMap())
      return pFontMap->CharSetFromUnicode(word, nOldCharset);
    return nOldCharset;
  }
  
  void CFX_Edit::BeginGroupUndo(const CFX_WideString& sTitle) {
    ASSERT(!m_pGroupUndoItem);
  
    m_pGroupUndoItem = new CFX_Edit_GroupUndoItem(sTitle);
  }
  
  void CFX_Edit::EndGroupUndo() {
    m_pGroupUndoItem->UpdateItems();
    m_Undo.AddItem(m_pGroupUndoItem);
    if (m_bOprNotify && m_pOprNotify)
      m_pOprNotify->OnAddUndo(m_pGroupUndoItem);
    m_pGroupUndoItem = NULL;
  }
  
  void CFX_Edit::AddEditUndoItem(CFX_Edit_UndoItem* pEditUndoItem) {
    if (m_pGroupUndoItem) {
      m_pGroupUndoItem->AddUndoItem(pEditUndoItem);
    } else {
      m_Undo.AddItem(pEditUndoItem);
      if (m_bOprNotify && m_pOprNotify)
        m_pOprNotify->OnAddUndo(pEditUndoItem);
    }
  }
  
  void CFX_Edit::AddUndoItem(IFX_Edit_UndoItem* pUndoItem) {
    m_Undo.AddItem(pUndoItem);
    if (m_bOprNotify && m_pOprNotify)
      m_pOprNotify->OnAddUndo(pUndoItem);
  }
  