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
  
  #ifndef FPDFSDK_INCLUDE_FXEDIT_FXET_EDIT_H_
  #define FPDFSDK_INCLUDE_FXEDIT_FXET_EDIT_H_
  
  #include "core/include/fpdfdoc/fpdf_vt.h"
  #include "fpdfsdk/include/fxedit/fx_edit.h"
  
  class CFX_Edit;
  class CFX_Edit_Iterator;
  class CFX_Edit_Provider;
  
  #define FX_EDIT_IsFloatZero(f) (f < 0.0001 && f > -0.0001)
  #define FX_EDIT_IsFloatEqual(fa, fb) FX_EDIT_IsFloatZero(fa - fb)
  #define FX_EDIT_IsFloatBigger(fa, fb) (fa > fb && !FX_EDIT_IsFloatEqual(fa, fb))
  #define FX_EDIT_IsFloatSmaller(fa, fb) \
    (fa < fb && !FX_EDIT_IsFloatEqual(fa, fb))
  
  /* ------------------------- CFX_Edit_Refresh ---------------------------- */
  
  enum REFRESH_PLAN_E { RP_ANALYSE, RP_NOANALYSE, RP_OPTIONAL };
  
  enum EDIT_PROPS_E {
    EP_LINELEADING,
    EP_LINEINDENT,
    EP_ALIGNMENT,
    EP_FONTINDEX,
    EP_FONTSIZE,
    EP_WORDCOLOR,
    EP_SCRIPTTYPE,
    EP_UNDERLINE,
    EP_CROSSOUT,
    EP_CHARSPACE,
    EP_HORZSCALE,
    EP_BOLD,
    EP_ITALIC
  };
  
  struct CFX_Edit_LineRect {
    CFX_Edit_LineRect(const CPVT_WordRange& wrLine, const CPDF_Rect& rcLine)
        : m_wrLine(wrLine), m_rcLine(rcLine) {}
  
    FX_BOOL operator!=(const CFX_Edit_LineRect& linerect) const {
      return FXSYS_memcmp(this, &linerect, sizeof(CFX_Edit_LineRect)) != 0;
    }
  
    FX_BOOL IsSameHeight(const CFX_Edit_LineRect& linerect) const {
      return FX_EDIT_IsFloatZero(
          (m_rcLine.top - m_rcLine.bottom) -
          (linerect.m_rcLine.top - linerect.m_rcLine.bottom));
    }
  
    FX_BOOL IsSameTop(const CFX_Edit_LineRect& linerect) const {
      return FX_EDIT_IsFloatZero(m_rcLine.top - linerect.m_rcLine.top);
    }
  
    FX_BOOL IsSameLeft(const CFX_Edit_LineRect& linerect) const {
      return FX_EDIT_IsFloatZero(m_rcLine.left - linerect.m_rcLine.left);
    }
  
    FX_BOOL IsSameRight(const CFX_Edit_LineRect& linerect) const {
      return FX_EDIT_IsFloatZero(m_rcLine.right - linerect.m_rcLine.right);
    }
  
    CPVT_WordRange m_wrLine;
    CPDF_Rect m_rcLine;
  };
  
  class CFX_Edit_LineRectArray {
   public:
    CFX_Edit_LineRectArray() {}
  
    virtual ~CFX_Edit_LineRectArray() { Empty(); }
  
    void Empty() {
      for (int32_t i = 0, sz = m_LineRects.GetSize(); i < sz; i++)
        delete m_LineRects.GetAt(i);
  
      m_LineRects.RemoveAll();
    }
  
    void RemoveAll() { m_LineRects.RemoveAll(); }
  
    void operator=(CFX_Edit_LineRectArray& rects) {
      Empty();
      for (int32_t i = 0, sz = rects.GetSize(); i < sz; i++)
        m_LineRects.Add(rects.GetAt(i));
  
      rects.RemoveAll();
    }
  
    void Add(const CPVT_WordRange& wrLine, const CPDF_Rect& rcLine) {
      m_LineRects.Add(new CFX_Edit_LineRect(wrLine, rcLine));
    }
  
    int32_t GetSize() const { return m_LineRects.GetSize(); }
  
    CFX_Edit_LineRect* GetAt(int32_t nIndex) const {
      if (nIndex < 0 || nIndex >= m_LineRects.GetSize())
        return NULL;
  
      return m_LineRects.GetAt(nIndex);
    }
  
    CFX_ArrayTemplate<CFX_Edit_LineRect*> m_LineRects;
  };
  
  class CFX_Edit_RectArray {
   public:
    CFX_Edit_RectArray() {}
  
    virtual ~CFX_Edit_RectArray() { Empty(); }
  
    void Empty() {
      for (int32_t i = 0, sz = m_Rects.GetSize(); i < sz; i++)
        delete m_Rects.GetAt(i);
  
      m_Rects.RemoveAll();
    }
  
    void Add(const CPDF_Rect& rect) {
      // check for overlapped area
      for (int32_t i = 0, sz = m_Rects.GetSize(); i < sz; i++) {
        CPDF_Rect* pRect = m_Rects.GetAt(i);
        if (pRect && pRect->Contains(rect))
          return;
      }
  
      m_Rects.Add(new CPDF_Rect(rect));
    }
  
    int32_t GetSize() const { return m_Rects.GetSize(); }
  
    CPDF_Rect* GetAt(int32_t nIndex) const {
      if (nIndex < 0 || nIndex >= m_Rects.GetSize())
        return NULL;
  
      return m_Rects.GetAt(nIndex);
    }
  
    CFX_ArrayTemplate<CPDF_Rect*> m_Rects;
  };
  
  class CFX_Edit_Refresh {
   public:
    CFX_Edit_Refresh();
    virtual ~CFX_Edit_Refresh();
  
    void BeginRefresh();
    void Push(const CPVT_WordRange& linerange, const CPDF_Rect& rect);
    void NoAnalyse();
    void Analyse(int32_t nAlignment);
    void AddRefresh(const CPDF_Rect& rect);
    const CFX_Edit_RectArray* GetRefreshRects() const;
    void EndRefresh();
  
   private:
    CFX_Edit_LineRectArray m_NewLineRects;
    CFX_Edit_LineRectArray m_OldLineRects;
    CFX_Edit_RectArray m_RefreshRects;
  };
  
  /* ------------------------- CFX_Edit_Select ---------------------------- */
  
  class CFX_Edit_Select {
   public:
    CFX_Edit_Select() {}
  
    CFX_Edit_Select(const CPVT_WordPlace& begin, const CPVT_WordPlace& end) {
      Set(begin, end);
    }
  
    explicit CFX_Edit_Select(const CPVT_WordRange& range) {
      Set(range.BeginPos, range.EndPos);
    }
  
    CPVT_WordRange ConvertToWordRange() const {
      return CPVT_WordRange(BeginPos, EndPos);
    }
  
    void Default() {
      BeginPos.Default();
      EndPos.Default();
    }
  
    void Set(const CPVT_WordPlace& begin, const CPVT_WordPlace& end) {
      BeginPos = begin;
      EndPos = end;
    }
  
    void SetBeginPos(const CPVT_WordPlace& begin) { BeginPos = begin; }
  
    void SetEndPos(const CPVT_WordPlace& end) { EndPos = end; }
  
    FX_BOOL IsExist() const { return BeginPos != EndPos; }
  
    FX_BOOL operator!=(const CPVT_WordRange& wr) const {
      return wr.BeginPos != BeginPos || wr.EndPos != EndPos;
    }
  
    CPVT_WordPlace BeginPos, EndPos;
  };
  
  /* ------------------------- CFX_Edit_Undo ---------------------------- */
  
  class CFX_Edit_Undo {
   public:
    explicit CFX_Edit_Undo(int32_t nBufsize);
    virtual ~CFX_Edit_Undo();
  
    void Undo();
    void Redo();
  
    void AddItem(IFX_Edit_UndoItem* pItem);
  
    FX_BOOL CanUndo() const;
    FX_BOOL CanRedo() const;
    FX_BOOL IsModified() const;
    FX_BOOL IsWorking() const;
  
    void Reset();
  
    IFX_Edit_UndoItem* GetItem(int32_t nIndex);
    int32_t GetItemCount() { return m_UndoItemStack.GetSize(); }
    int32_t GetCurUndoPos() { return m_nCurUndoPos; }
  
   private:
    void SetBufSize(int32_t nSize) { m_nBufSize = nSize; }
    int32_t GetBufSize() { return m_nBufSize; }
  
    void RemoveHeads();
    void RemoveTails();
  
   private:
    CFX_ArrayTemplate<IFX_Edit_UndoItem*> m_UndoItemStack;
  
    int32_t m_nCurUndoPos;
    int32_t m_nBufSize;
    FX_BOOL m_bModified;
    FX_BOOL m_bVirgin;
    FX_BOOL m_bWorking;
  };
  
  class CFX_Edit_UndoItem : public IFX_Edit_UndoItem {
   public:
    CFX_Edit_UndoItem() : m_bFirst(TRUE), m_bLast(TRUE) {}
    ~CFX_Edit_UndoItem() override {}
  
    CFX_WideString GetUndoTitle() override { return L""; }
  
    void SetFirst(FX_BOOL bFirst) { m_bFirst = bFirst; }
    FX_BOOL IsFirst() { return m_bFirst; }
    void SetLast(FX_BOOL bLast) { m_bLast = bLast; }
    FX_BOOL IsLast() { return m_bLast; }
  
   private:
    FX_BOOL m_bFirst;
    FX_BOOL m_bLast;
  };
  
  class CFX_Edit_GroupUndoItem : public IFX_Edit_UndoItem {
   public:
    explicit CFX_Edit_GroupUndoItem(const CFX_WideString& sTitle);
    ~CFX_Edit_GroupUndoItem() override;
  
    void Undo() override;
    void Redo() override;
    CFX_WideString GetUndoTitle() override;
  
    void AddUndoItem(CFX_Edit_UndoItem* pUndoItem);
    void UpdateItems();
  
   private:
    CFX_WideString m_sTitle;
    CFX_ArrayTemplate<CFX_Edit_UndoItem*> m_Items;
  };
  
  /* ------------------------- CFX_Edit_UndoItem derived classes
   * ---------------------------- */
  
  class CFXEU_InsertWord : public CFX_Edit_UndoItem {
   public:
    CFXEU_InsertWord(CFX_Edit* pEdit,
                     const CPVT_WordPlace& wpOldPlace,
                     const CPVT_WordPlace& wpNewPlace,
                     FX_WORD word,
                     int32_t charset,
                     const CPVT_WordProps* pWordProps);
    ~CFXEU_InsertWord() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
  
    CPVT_WordPlace m_wpOld;
    CPVT_WordPlace m_wpNew;
    FX_WORD m_Word;
    int32_t m_nCharset;
    CPVT_WordProps m_WordProps;
  };
  
  class CFXEU_InsertReturn : public CFX_Edit_UndoItem {
   public:
    CFXEU_InsertReturn(CFX_Edit* pEdit,
                       const CPVT_WordPlace& wpOldPlace,
                       const CPVT_WordPlace& wpNewPlace,
                       const CPVT_SecProps* pSecProps,
                       const CPVT_WordProps* pWordProps);
    ~CFXEU_InsertReturn() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
  
    CPVT_WordPlace m_wpOld;
    CPVT_WordPlace m_wpNew;
    CPVT_SecProps m_SecProps;
    CPVT_WordProps m_WordProps;
  };
  
  class CFXEU_Backspace : public CFX_Edit_UndoItem {
   public:
    CFXEU_Backspace(CFX_Edit* pEdit,
                    const CPVT_WordPlace& wpOldPlace,
                    const CPVT_WordPlace& wpNewPlace,
                    FX_WORD word,
                    int32_t charset,
                    const CPVT_SecProps& SecProps,
                    const CPVT_WordProps& WordProps);
    ~CFXEU_Backspace() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
  
    CPVT_WordPlace m_wpOld;
    CPVT_WordPlace m_wpNew;
    FX_WORD m_Word;
    int32_t m_nCharset;
    CPVT_SecProps m_SecProps;
    CPVT_WordProps m_WordProps;
  };
  
  class CFXEU_Delete : public CFX_Edit_UndoItem {
   public:
    CFXEU_Delete(CFX_Edit* pEdit,
                 const CPVT_WordPlace& wpOldPlace,
                 const CPVT_WordPlace& wpNewPlace,
                 FX_WORD word,
                 int32_t charset,
                 const CPVT_SecProps& SecProps,
                 const CPVT_WordProps& WordProps,
                 FX_BOOL bSecEnd);
    ~CFXEU_Delete() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
  
    CPVT_WordPlace m_wpOld;
    CPVT_WordPlace m_wpNew;
    FX_WORD m_Word;
    int32_t m_nCharset;
    CPVT_SecProps m_SecProps;
    CPVT_WordProps m_WordProps;
    FX_BOOL m_bSecEnd;
  };
  
  class CFXEU_Clear : public CFX_Edit_UndoItem {
   public:
    CFXEU_Clear(CFX_Edit* pEdit,
                const CPVT_WordRange& wrSel,
                const CFX_WideString& swText);
    ~CFXEU_Clear() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
  
    CPVT_WordRange m_wrSel;
    CFX_WideString m_swText;
  };
  
  class CFXEU_ClearRich : public CFX_Edit_UndoItem {
   public:
    CFXEU_ClearRich(CFX_Edit* pEdit,
                    const CPVT_WordPlace& wpOldPlace,
                    const CPVT_WordPlace& wpNewPlace,
                    const CPVT_WordRange& wrSel,
                    FX_WORD word,
                    int32_t charset,
                    const CPVT_SecProps& SecProps,
                    const CPVT_WordProps& WordProps);
    ~CFXEU_ClearRich() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
  
    CPVT_WordPlace m_wpOld;
    CPVT_WordPlace m_wpNew;
    CPVT_WordRange m_wrSel;
    FX_WORD m_Word;
    int32_t m_nCharset;
    CPVT_SecProps m_SecProps;
    CPVT_WordProps m_WordProps;
  };
  
  class CFXEU_InsertText : public CFX_Edit_UndoItem {
   public:
    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);
    ~CFXEU_InsertText() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
  
    CPVT_WordPlace m_wpOld;
    CPVT_WordPlace m_wpNew;
    CFX_WideString m_swText;
    int32_t m_nCharset;
    CPVT_SecProps m_SecProps;
    CPVT_WordProps m_WordProps;
  };
  
  class CFXEU_SetSecProps : public CFX_Edit_UndoItem {
   public:
    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);
    ~CFXEU_SetSecProps() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
    CPVT_WordPlace m_wpPlace;
    CPVT_WordRange m_wrPlace;
    EDIT_PROPS_E m_eProps;
  
    CPVT_SecProps m_OldSecProps;
    CPVT_SecProps m_NewSecProps;
    CPVT_WordProps m_OldWordProps;
    CPVT_WordProps m_NewWordProps;
  };
  
  class CFXEU_SetWordProps : public CFX_Edit_UndoItem {
   public:
    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);
    ~CFXEU_SetWordProps() override;
  
    // CFX_Edit_UndoItem
    void Redo() override;
    void Undo() override;
  
   private:
    CFX_Edit* m_pEdit;
    CPVT_WordPlace m_wpPlace;
    CPVT_WordRange m_wrPlace;
    EDIT_PROPS_E m_eProps;
  
    CPVT_WordProps m_OldWordProps;
    CPVT_WordProps m_NewWordProps;
  };
  
  /* ------------------------- CFX_Edit ---------------------------- */
  
  class CFX_Edit : public IFX_Edit {
    friend class CFX_Edit_Iterator;
    friend class CFXEU_InsertWord;
    friend class CFXEU_InsertReturn;
    friend class CFXEU_Backspace;
    friend class CFXEU_Delete;
    friend class CFXEU_Clear;
    friend class CFXEU_ClearRich;
    friend class CFXEU_SetSecProps;
    friend class CFXEU_SetWordProps;
    friend class CFXEU_InsertText;
  
   public:
    explicit CFX_Edit(IPDF_VariableText* pVT);
    ~CFX_Edit() override;
  
    // IFX_Edit
    void SetFontMap(IFX_Edit_FontMap* pFontMap) override;
    void SetVTProvider(IPDF_VariableText_Provider* pProvider) override;
    void SetNotify(IFX_Edit_Notify* pNotify) override;
    void SetOprNotify(IFX_Edit_OprNotify* pOprNotify) override;
    IFX_Edit_Iterator* GetIterator() override;
    IPDF_VariableText* GetVariableText() override;
    IFX_Edit_FontMap* GetFontMap() override;
    void Initialize() override;
    void SetPlateRect(const CPDF_Rect& rect, FX_BOOL bPaint = TRUE) override;
    void SetScrollPos(const CPDF_Point& point) override;
    void SetAlignmentH(int32_t nFormat = 0, FX_BOOL bPaint = TRUE) override;
    void SetAlignmentV(int32_t nFormat = 0, FX_BOOL bPaint = TRUE) override;
    void SetPasswordChar(FX_WORD wSubWord = '*', FX_BOOL bPaint = TRUE) override;
    void SetLimitChar(int32_t nLimitChar = 0, FX_BOOL bPaint = TRUE) override;
    void SetCharArray(int32_t nCharArray = 0, FX_BOOL bPaint = TRUE) override;
    void SetCharSpace(FX_FLOAT fCharSpace = 0.0f, FX_BOOL bPaint = TRUE) override;
    void SetHorzScale(int32_t nHorzScale = 100, FX_BOOL bPaint = TRUE) override;
    void SetLineLeading(FX_FLOAT fLineLeading, FX_BOOL bPaint = TRUE) override;
    void SetMultiLine(FX_BOOL bMultiLine = TRUE, FX_BOOL bPaint = TRUE) override;
    void SetAutoReturn(FX_BOOL bAuto = TRUE, FX_BOOL bPaint = TRUE) override;
    void SetAutoFontSize(FX_BOOL bAuto = TRUE, FX_BOOL bPaint = TRUE) override;
    void SetAutoScroll(FX_BOOL bAuto = TRUE, FX_BOOL bPaint = TRUE) override;
    void SetFontSize(FX_FLOAT fFontSize, FX_BOOL bPaint = TRUE) override;
    void SetTextOverflow(FX_BOOL bAllowed = FALSE,
                         FX_BOOL bPaint = TRUE) override;
    FX_BOOL IsRichText() const override;
    void SetRichText(FX_BOOL bRichText = TRUE, FX_BOOL bPaint = TRUE) override;
    FX_BOOL SetRichFontSize(FX_FLOAT fFontSize) override;
    FX_BOOL SetRichFontIndex(int32_t nFontIndex) override;
    FX_BOOL SetRichTextColor(FX_COLORREF dwColor) override;
    FX_BOOL SetRichTextScript(int32_t nScriptType) override;
    FX_BOOL SetRichTextBold(FX_BOOL bBold = TRUE) override;
    FX_BOOL SetRichTextItalic(FX_BOOL bItalic = TRUE) override;
    FX_BOOL SetRichTextUnderline(FX_BOOL bUnderline = TRUE) override;
    FX_BOOL SetRichTextCrossout(FX_BOOL bCrossout = TRUE) override;
    FX_BOOL SetRichTextCharSpace(FX_FLOAT fCharSpace) override;
    FX_BOOL SetRichTextHorzScale(int32_t nHorzScale = 100) override;
    FX_BOOL SetRichTextLineLeading(FX_FLOAT fLineLeading) override;
    FX_BOOL SetRichTextLineIndent(FX_FLOAT fLineIndent) override;
    FX_BOOL SetRichTextAlignment(int32_t nAlignment) override;
    void OnMouseDown(const CPDF_Point& point,
                     FX_BOOL bShift,
                     FX_BOOL bCtrl) override;
    void OnMouseMove(const CPDF_Point& point,
                     FX_BOOL bShift,
                     FX_BOOL bCtrl) override;
    void OnVK_UP(FX_BOOL bShift, FX_BOOL bCtrl) override;
    void OnVK_DOWN(FX_BOOL bShift, FX_BOOL bCtrl) override;
    void OnVK_LEFT(FX_BOOL bShift, FX_BOOL bCtrl) override;
    void OnVK_RIGHT(FX_BOOL bShift, FX_BOOL bCtrl) override;
    void OnVK_HOME(FX_BOOL bShift, FX_BOOL bCtrl) override;
    void OnVK_END(FX_BOOL bShift, FX_BOOL bCtrl) override;
    void SetText(const FX_WCHAR* text,
                 int32_t charset = DEFAULT_CHARSET,
                 const CPVT_SecProps* pSecProps = NULL,
                 const CPVT_WordProps* pWordProps = NULL) override;
    FX_BOOL InsertWord(FX_WORD word,
                       int32_t charset = DEFAULT_CHARSET,
                       const CPVT_WordProps* pWordProps = NULL) override;
    FX_BOOL InsertReturn(const CPVT_SecProps* pSecProps = NULL,
                         const CPVT_WordProps* pWordProps = NULL) override;
    FX_BOOL Backspace() override;
    FX_BOOL Delete() override;
    FX_BOOL Clear() override;
    FX_BOOL InsertText(const FX_WCHAR* text,
                       int32_t charset = DEFAULT_CHARSET,
                       const CPVT_SecProps* pSecProps = NULL,
                       const CPVT_WordProps* pWordProps = NULL) override;
    FX_BOOL Redo() override;
    FX_BOOL Undo() override;
    int32_t WordPlaceToWordIndex(const CPVT_WordPlace& place) const override;
    CPVT_WordPlace WordIndexToWordPlace(int32_t index) const override;
    CPVT_WordPlace GetLineBeginPlace(const CPVT_WordPlace& place) const override;
    CPVT_WordPlace GetLineEndPlace(const CPVT_WordPlace& place) const override;
    CPVT_WordPlace GetSectionBeginPlace(
        const CPVT_WordPlace& place) const override;
    CPVT_WordPlace GetSectionEndPlace(const CPVT_WordPlace& place) const override;
    CPVT_WordPlace SearchWordPlace(const CPDF_Point& point) const override;
    int32_t GetCaret() const override;
    CPVT_WordPlace GetCaretWordPlace() const override;
    CFX_WideString GetSelText() const override;
    CFX_WideString GetText() const override;
    FX_FLOAT GetFontSize() const override;
    FX_WORD GetPasswordChar() const override;
    CPDF_Point GetScrollPos() const override;
    int32_t GetCharArray() const override;
    CPDF_Rect GetPlateRect() const override;
    CPDF_Rect GetContentRect() const override;
    CFX_WideString GetRangeText(const CPVT_WordRange& range) const override;
    int32_t GetHorzScale() const override;
    FX_FLOAT GetCharSpace() const override;
    int32_t GetTotalWords() const override;
    void SetSel(int32_t nStartChar, int32_t nEndChar) override;
    void GetSel(int32_t& nStartChar, int32_t& nEndChar) const override;
    void SelectAll() override;
    void SelectNone() override;
    FX_BOOL IsSelected() const override;
    void Paint() override;
    void EnableNotify(FX_BOOL bNotify) override;
    void EnableRefresh(FX_BOOL bRefresh) override;
    void RefreshWordRange(const CPVT_WordRange& wr) override;
    void SetCaret(int32_t nPos) override;
    CPVT_WordRange GetWholeWordRange() const override;
    CPVT_WordRange GetSelectWordRange() const override;
    void EnableUndo(FX_BOOL bUndo) override;
    void EnableOprNotify(FX_BOOL bNotify) override;
    FX_BOOL IsTextFull() const override;
    FX_BOOL IsTextOverflow() const;
    FX_BOOL CanUndo() const override;
    FX_BOOL CanRedo() const override;
    FX_BOOL IsModified() const override;
    CPVT_WordRange GetVisibleWordRange() const override;
    void AddUndoItem(IFX_Edit_UndoItem* pUndoItem) override;
  
    FX_BOOL Empty();
  
    CPVT_WordPlace DoInsertText(const CPVT_WordPlace& place,
                                const FX_WCHAR* text,
                                int32_t charset,
                                const CPVT_SecProps* pSecProps,
                                const CPVT_WordProps* pWordProps);
    int32_t GetCharSetFromUnicode(FX_WORD word, int32_t nOldCharset);
  
    int32_t GetTotalLines() const;
  
   private:
    void SetSel(const CPVT_WordPlace& begin, const CPVT_WordPlace& end);
  
    void RearrangeAll();
    void RearrangePart(const CPVT_WordRange& range);
    void ScrollToCaret();
    void SetScrollInfo();
    void SetScrollPosX(FX_FLOAT fx);
    void SetScrollPosY(FX_FLOAT fy);
    void SetScrollLimit();
    void SetContentChanged();
  
    void SetText(const FX_WCHAR* text,
                 int32_t charset,
                 const CPVT_SecProps* pSecProps,
                 const CPVT_WordProps* pWordProps,
                 FX_BOOL bAddUndo,
                 FX_BOOL bPaint);
    FX_BOOL InsertWord(FX_WORD word,
                       int32_t charset,
                       const CPVT_WordProps* pWordProps,
                       FX_BOOL bAddUndo,
                       FX_BOOL bPaint);
    FX_BOOL InsertReturn(const CPVT_SecProps* pSecProps,
                         const CPVT_WordProps* pWordProps,
                         FX_BOOL bAddUndo,
                         FX_BOOL bPaint);
    FX_BOOL Backspace(FX_BOOL bAddUndo, FX_BOOL bPaint);
    FX_BOOL Delete(FX_BOOL bAddUndo, FX_BOOL bPaint);
    FX_BOOL Clear(FX_BOOL bAddUndo, FX_BOOL bPaint);
    FX_BOOL InsertText(const FX_WCHAR* text,
                       int32_t charset,
                       const CPVT_SecProps* pSecProps,
                       const CPVT_WordProps* pWordProps,
                       FX_BOOL bAddUndo,
                       FX_BOOL bPaint);
    FX_BOOL SetRichTextProps(EDIT_PROPS_E eProps,
                             const CPVT_SecProps* pSecProps,
                             const CPVT_WordProps* pWordProps);
    FX_BOOL SetSecProps(EDIT_PROPS_E eProps,
                        const CPVT_WordPlace& place,
                        const CPVT_SecProps* pSecProps,
                        const CPVT_WordProps* pWordProps,
                        const CPVT_WordRange& wr,
                        FX_BOOL bAddUndo);
    FX_BOOL SetWordProps(EDIT_PROPS_E eProps,
                         const CPVT_WordPlace& place,
                         const CPVT_WordProps* pWordProps,
                         const CPVT_WordRange& wr,
                         FX_BOOL bAddUndo);
    void PaintSetProps(EDIT_PROPS_E eProps, const CPVT_WordRange& wr);
    void PaintInsertText(const CPVT_WordPlace& wpOld,
                         const CPVT_WordPlace& wpNew);
  
    inline CPDF_Point VTToEdit(const CPDF_Point& point) const;
    inline CPDF_Point EditToVT(const CPDF_Point& point) const;
    inline CPDF_Rect VTToEdit(const CPDF_Rect& rect) const;
    inline CPDF_Rect EditToVT(const CPDF_Rect& rect) const;
  
    void Refresh(REFRESH_PLAN_E ePlan,
                 const CPVT_WordRange* pRange1 = NULL,
                 const CPVT_WordRange* pRange2 = NULL);
    void RefreshPushLineRects(const CPVT_WordRange& wr);
    void RefreshPushRandomRects(const CPVT_WordRange& wr);
  
    void SetCaret(const CPVT_WordPlace& place);
    void SetCaretInfo();
    void SetCaretOrigin();
    void SetCaretChange();
  
    CPVT_WordRange GetLatinWordsRange(const CPVT_WordPlace& place) const;
    CPVT_WordRange CombineWordRange(const CPVT_WordRange& wr1,
                                    const CPVT_WordRange& wr2);
  
  
    void BeginGroupUndo(const CFX_WideString& sTitle);
    void EndGroupUndo();
    void AddEditUndoItem(CFX_Edit_UndoItem* pEditUndoItem);
  
    void SetPageInfo(const CPVT_WordPlace& place);
    CPVT_WordPlace SearchPageEndPlace(const CPVT_WordPlace& wpPageBegin,
                                      const CPDF_Point& point) const;
    FX_FLOAT GetLineTop(const CPVT_WordPlace& place) const;
    FX_FLOAT GetLineBottom(const CPVT_WordPlace& place) const;
  
   private:
    IPDF_VariableText* m_pVT;
    IFX_Edit_Notify* m_pNotify;
    IFX_Edit_OprNotify* m_pOprNotify;
    CFX_Edit_Provider* m_pVTProvide;
  
    CPVT_WordPlace m_wpCaret;
    CPVT_WordPlace m_wpOldCaret;
    CFX_Edit_Select m_SelState;
  
    CPDF_Point m_ptScrollPos;
    CPDF_Point m_ptRefreshScrollPos;
    FX_BOOL m_bEnableScroll;
    IFX_Edit_Iterator* m_pIterator;
    CFX_Edit_Refresh m_Refresh;
    CPDF_Point m_ptCaret;
    CFX_Edit_Undo m_Undo;
    int32_t m_nAlignment;
    FX_BOOL m_bNotifyFlag;
    FX_BOOL m_bEnableOverflow;
    FX_BOOL m_bEnableRefresh;
    CPDF_Rect m_rcOldContent;
    FX_BOOL m_bEnableUndo;
    FX_BOOL m_bNotify;
    FX_BOOL m_bOprNotify;
    CFX_Edit_GroupUndoItem* m_pGroupUndoItem;
  };
  
  /* ------------------------- CFX_Edit_Iterator ---------------------------- */
  
  class CFX_Edit_Iterator : public IFX_Edit_Iterator {
   public:
    CFX_Edit_Iterator(CFX_Edit* pEdit, IPDF_VariableText_Iterator* pVTIterator);
    ~CFX_Edit_Iterator() override;
  
    // IFX_Edit_Iterator
    FX_BOOL NextWord() override;
    FX_BOOL NextLine() override;
    FX_BOOL NextSection() override;
    FX_BOOL PrevWord() override;
    FX_BOOL PrevLine() override;
    FX_BOOL PrevSection() override;
    FX_BOOL GetWord(CPVT_Word& word) const override;
    FX_BOOL GetLine(CPVT_Line& line) const override;
    FX_BOOL GetSection(CPVT_Section& section) const override;
    void SetAt(int32_t nWordIndex) override;
    void SetAt(const CPVT_WordPlace& place) override;
    const CPVT_WordPlace& GetAt() const override;
    IFX_Edit* GetEdit() const override;
  
   private:
    CFX_Edit* m_pEdit;
    IPDF_VariableText_Iterator* m_pVTIterator;
  };
  
  class CFX_Edit_Provider : public IPDF_VariableText_Provider {
   public:
    explicit CFX_Edit_Provider(IFX_Edit_FontMap* pFontMap);
    ~CFX_Edit_Provider() override;
  
    IFX_Edit_FontMap* GetFontMap();
  
    // IPDF_VariableText_Provider:
    int32_t GetCharWidth(int32_t nFontIndex,
                         FX_WORD word,
                         int32_t nWordStyle) override;
    int32_t GetTypeAscent(int32_t nFontIndex) override;
    int32_t GetTypeDescent(int32_t nFontIndex) override;
    int32_t GetWordFontIndex(FX_WORD word,
                             int32_t charset,
                             int32_t nFontIndex) override;
    int32_t GetDefaultFontIndex() override;
    FX_BOOL IsLatinWord(FX_WORD word) override;
  
   private:
    IFX_Edit_FontMap* m_pFontMap;
  };
  
  #endif  // FPDFSDK_INCLUDE_FXEDIT_FXET_EDIT_H_
  