fpdfsdk/pwl/cpwl_edit_impl.h - platform/external/pdfium - Gitiles

 // 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_PWL_CPWL_EDIT_IMPL_H_
 #define FPDFSDK_PWL_CPWL_EDIT_IMPL_H_

 #include <deque>
 #include <memory>
 #include <vector>

 #include "core/fpdfdoc/cpdf_variabletext.h"
 #include "core/fpdfdoc/cpvt_wordrange.h"
 #include "core/fxcrt/unowned_ptr.h"

 #define FX_EDIT_ISLATINWORD(u)                  \
   (u == 0x2D || (u <= 0x005A && u >= 0x0041) || \
    (u <= 0x007A && u >= 0x0061) || (u <= 0x02AF && u >= 0x00C0))

 class CFFL_FormFiller;
 class CPWL_EditImpl;
 class CPWL_EditImpl_Iterator;
 class CPWL_EditImpl_Provider;
 class CFX_RenderDevice;
 class CFX_SystemHandler;
 class CPWL_Edit;
 class CPWL_EditCtrl;
 class IFX_Edit_UndoItem;

 struct CPWL_EditImpl_LineRect {
   CPWL_EditImpl_LineRect(const CPVT_WordRange& wrLine,
                          const CFX_FloatRect& rcLine)
       : m_wrLine(wrLine), m_rcLine(rcLine) {}

   CPVT_WordRange m_wrLine;
   CFX_FloatRect m_rcLine;
 };

 class CPWL_EditImpl_LineRectArray {
  public:
   CPWL_EditImpl_LineRectArray();
   ~CPWL_EditImpl_LineRectArray();

   void operator=(CPWL_EditImpl_LineRectArray&& rects);
   void Add(const CPVT_WordRange& wrLine, const CFX_FloatRect& rcLine);

   int32_t GetSize() const;
   CPWL_EditImpl_LineRect* GetAt(int32_t nIndex) const;

  private:
   std::vector<std::unique_ptr<CPWL_EditImpl_LineRect>> m_LineRects;
 };

 class CPWL_EditImpl_RectArray {
  public:
   CPWL_EditImpl_RectArray();
   ~CPWL_EditImpl_RectArray();

   void Clear();
   void Add(const CFX_FloatRect& rect);

   int32_t GetSize() const;
   CFX_FloatRect* GetAt(int32_t nIndex) const;

  private:
   std::vector<std::unique_ptr<CFX_FloatRect>> m_Rects;
 };

 class CPWL_EditImpl_Refresh {
  public:
   CPWL_EditImpl_Refresh();
   ~CPWL_EditImpl_Refresh();

   void BeginRefresh();
   void Push(const CPVT_WordRange& linerange, const CFX_FloatRect& rect);
   void NoAnalyse();
   const CPWL_EditImpl_RectArray* GetRefreshRects() const;
   void EndRefresh();

  private:
   CPWL_EditImpl_LineRectArray m_NewLineRects;
   CPWL_EditImpl_LineRectArray m_OldLineRects;
   CPWL_EditImpl_RectArray m_RefreshRects;
 };

 class CPWL_EditImpl_Select {
  public:
   CPWL_EditImpl_Select();
   explicit CPWL_EditImpl_Select(const CPVT_WordRange& range);

   void Reset();
   void Set(const CPVT_WordPlace& begin, const CPVT_WordPlace& end);
   void SetEndPos(const CPVT_WordPlace& end);

   CPVT_WordRange ConvertToWordRange() const;
   bool IsEmpty() const;

   CPVT_WordPlace BeginPos;
   CPVT_WordPlace EndPos;
 };

 class CPWL_EditImpl_Undo {
  public:
   CPWL_EditImpl_Undo();
   ~CPWL_EditImpl_Undo();

   void AddItem(std::unique_ptr<IFX_Edit_UndoItem> pItem);
   void Undo();
   void Redo();
   bool CanUndo() const;
   bool CanRedo() const;

  private:
   void RemoveHeads();
   void RemoveTails();

   std::deque<std::unique_ptr<IFX_Edit_UndoItem>> m_UndoItemStack;
   size_t m_nCurUndoPos;
   bool m_bWorking;
 };

 class IFX_Edit_UndoItem {
  public:
   virtual ~IFX_Edit_UndoItem() {}

   virtual void Undo() = 0;
   virtual void Redo() = 0;
 };

 class CFXEU_InsertWord : public IFX_Edit_UndoItem {
  public:
   CFXEU_InsertWord(CPWL_EditImpl* pEdit,
                    const CPVT_WordPlace& wpOldPlace,
                    const CPVT_WordPlace& wpNewPlace,
                    uint16_t word,
                    int32_t charset);
   ~CFXEU_InsertWord() override;

   // IFX_Edit_UndoItem:
   void Redo() override;
   void Undo() override;

  private:
   UnownedPtr<CPWL_EditImpl> m_pEdit;

   CPVT_WordPlace m_wpOld;
   CPVT_WordPlace m_wpNew;
   uint16_t m_Word;
   int32_t m_nCharset;
 };

 class CFXEU_InsertReturn : public IFX_Edit_UndoItem {
  public:
   CFXEU_InsertReturn(CPWL_EditImpl* pEdit,
                      const CPVT_WordPlace& wpOldPlace,
                      const CPVT_WordPlace& wpNewPlace);
   ~CFXEU_InsertReturn() override;

   // IFX_Edit_UndoItem:
   void Redo() override;
   void Undo() override;

  private:
   UnownedPtr<CPWL_EditImpl> m_pEdit;

   CPVT_WordPlace m_wpOld;
   CPVT_WordPlace m_wpNew;
 };

 class CFXEU_Backspace : public IFX_Edit_UndoItem {
  public:
   CFXEU_Backspace(CPWL_EditImpl* pEdit,
                   const CPVT_WordPlace& wpOldPlace,
                   const CPVT_WordPlace& wpNewPlace,
                   uint16_t word,
                   int32_t charset);
   ~CFXEU_Backspace() override;

   // IFX_Edit_UndoItem:
   void Redo() override;
   void Undo() override;

  private:
   UnownedPtr<CPWL_EditImpl> m_pEdit;

   CPVT_WordPlace m_wpOld;
   CPVT_WordPlace m_wpNew;
   uint16_t m_Word;
   int32_t m_nCharset;
 };

 class CFXEU_Delete : public IFX_Edit_UndoItem {
  public:
   CFXEU_Delete(CPWL_EditImpl* pEdit,
                const CPVT_WordPlace& wpOldPlace,
                const CPVT_WordPlace& wpNewPlace,
                uint16_t word,
                int32_t charset,
                bool bSecEnd);
   ~CFXEU_Delete() override;

   // IFX_Edit_UndoItem:
   void Redo() override;
   void Undo() override;

  private:
   UnownedPtr<CPWL_EditImpl> m_pEdit;

   CPVT_WordPlace m_wpOld;
   CPVT_WordPlace m_wpNew;
   uint16_t m_Word;
   int32_t m_nCharset;
   bool m_bSecEnd;
 };

 class CFXEU_Clear : public IFX_Edit_UndoItem {
  public:
   CFXEU_Clear(CPWL_EditImpl* pEdit,
               const CPVT_WordRange& wrSel,
               const WideString& swText);
   ~CFXEU_Clear() override;

   // IFX_Edit_UndoItem:
   void Redo() override;
   void Undo() override;

  private:
   UnownedPtr<CPWL_EditImpl> m_pEdit;

   CPVT_WordRange m_wrSel;
   WideString m_swText;
 };

 class CFXEU_InsertText : public IFX_Edit_UndoItem {
  public:
   CFXEU_InsertText(CPWL_EditImpl* pEdit,
                    const CPVT_WordPlace& wpOldPlace,
                    const CPVT_WordPlace& wpNewPlace,
                    const WideString& swText,
                    int32_t charset);
   ~CFXEU_InsertText() override;

   // IFX_Edit_UndoItem:
   void Redo() override;
   void Undo() override;

  private:
   UnownedPtr<CPWL_EditImpl> m_pEdit;

   CPVT_WordPlace m_wpOld;
   CPVT_WordPlace m_wpNew;
   WideString m_swText;
   int32_t m_nCharset;
 };

 class CPWL_EditImpl {
  public:
   static void DrawEdit(CFX_RenderDevice* pDevice,
                        const CFX_Matrix& mtUser2Device,
                        CPWL_EditImpl* pEdit,
                        FX_COLORREF crTextFill,
                        const CFX_FloatRect& rcClip,
                        const CFX_PointF& ptOffset,
                        const CPVT_WordRange* pRange,
                        CFX_SystemHandler* pSystemHandler,
                        CFFL_FormFiller* pFFLData);

   CPWL_EditImpl();
   ~CPWL_EditImpl();

   void SetFontMap(IPVT_FontMap* pFontMap);
   void SetNotify(CPWL_EditCtrl* pNotify);
   void SetOperationNotify(CPWL_Edit* pOperationNotify);

   // Returns an iterator for the contents. Should not be released.
   CPWL_EditImpl_Iterator* GetIterator();
   IPVT_FontMap* GetFontMap();
   void Initialize();

   // Set the bounding box of the text area.
   void SetPlateRect(const CFX_FloatRect& rect);
   void SetScrollPos(const CFX_PointF& point);

   // Set the horizontal text alignment. (nFormat [0:left, 1:middle, 2:right])
   void SetAlignmentH(int32_t nFormat, bool bPaint);
   // Set the vertical text alignment. (nFormat [0:left, 1:middle, 2:right])
   void SetAlignmentV(int32_t nFormat, bool bPaint);

   // Set the substitution character for hidden text.
   void SetPasswordChar(uint16_t wSubWord, bool bPaint);

   // Set the maximum number of words in the text.
   void SetLimitChar(int32_t nLimitChar);
   void SetCharArray(int32_t nCharArray);
   void SetCharSpace(float fCharSpace);
   void SetMultiLine(bool bMultiLine, bool bPaint);
   void SetAutoReturn(bool bAuto, bool bPaint);
   void SetAutoFontSize(bool bAuto, bool bPaint);
   void SetAutoScroll(bool bAuto, bool bPaint);
   void SetFontSize(float fFontSize);
   void SetTextOverflow(bool bAllowed, bool bPaint);
   void OnMouseDown(const CFX_PointF& point, bool bShift, bool bCtrl);
   void OnMouseMove(const CFX_PointF& point, bool bShift, bool bCtrl);
   void OnVK_UP(bool bShift, bool bCtrl);
   void OnVK_DOWN(bool bShift, bool bCtrl);
   void OnVK_LEFT(bool bShift, bool bCtrl);
   void OnVK_RIGHT(bool bShift, bool bCtrl);
   void OnVK_HOME(bool bShift, bool bCtrl);
   void OnVK_END(bool bShift, bool bCtrl);
   void SetText(const WideString& sText);
   bool InsertWord(uint16_t word, int32_t charset);
   bool InsertReturn();
   bool Backspace();
   bool Delete();
   bool ClearSelection();
   bool InsertText(const WideString& sText, int32_t charset);
   bool Redo();
   bool Undo();
   CPVT_WordPlace WordIndexToWordPlace(int32_t index) const;
   CPVT_WordPlace SearchWordPlace(const CFX_PointF& point) const;
   int32_t GetCaret() const;
   CPVT_WordPlace GetCaretWordPlace() const;
   WideString GetSelectedText() const;
   WideString GetText() const;
   float GetFontSize() const;
   uint16_t GetPasswordChar() const;
   CFX_PointF GetScrollPos() const;
   int32_t GetCharArray() const;
   CFX_FloatRect GetContentRect() const;
   WideString GetRangeText(const CPVT_WordRange& range) const;
   int32_t GetHorzScale() const;
   float GetCharSpace() const;
   void SetSelection(int32_t nStartChar, int32_t nEndChar);
   void GetSelection(int32_t& nStartChar, int32_t& nEndChar) const;
   void SelectAll();
   void SelectNone();
   bool IsSelected() const;
   void Paint();
   void EnableRefresh(bool bRefresh);
   void RefreshWordRange(const CPVT_WordRange& wr);
   CPVT_WordRange GetWholeWordRange() const;
   CPVT_WordRange GetSelectWordRange() const;
   void EnableUndo(bool bUndo);
   bool IsTextFull() const;
   bool IsTextOverflow() const;
   bool CanUndo() const;
   bool CanRedo() const;
   CPVT_WordRange GetVisibleWordRange() const;

   bool Empty();

   CPVT_WordPlace DoInsertText(const CPVT_WordPlace& place,
                               const WideString& sText,
                               int32_t charset);
   int32_t GetCharSetFromUnicode(uint16_t word, int32_t nOldCharset);

   int32_t GetTotalLines() const;

   ByteString GetPDFWordString(int32_t nFontIndex,
                               uint16_t Word,
                               uint16_t SubWord);

   void SetSelection(const CPVT_WordPlace& begin, const CPVT_WordPlace& end);

   bool Delete(bool bAddUndo, bool bPaint);
   bool Clear(bool bAddUndo, bool bPaint);
   bool InsertText(const WideString& sText,
                   int32_t charset,
                   bool bAddUndo,
                   bool bPaint);
   bool InsertWord(uint16_t word, int32_t charset, bool bAddUndo, bool bPaint);
   bool InsertReturn(bool bAddUndo, bool bPaint);
   bool Backspace(bool bAddUndo, bool bPaint);
   void SetCaret(const CPVT_WordPlace& place);

   CFX_PointF VTToEdit(const CFX_PointF& point) const;

  private:
   void RearrangeAll();
   void RearrangePart(const CPVT_WordRange& range);
   void ScrollToCaret();
   void SetScrollInfo();
   void SetScrollPosX(float fx);
   void SetScrollPosY(float fy);
   void SetScrollLimit();
   void SetContentChanged();

   void PaintInsertText(const CPVT_WordPlace& wpOld,
                        const CPVT_WordPlace& wpNew);

   CFX_PointF EditToVT(const CFX_PointF& point) const;
   CFX_FloatRect VTToEdit(const CFX_FloatRect& rect) const;

   void Refresh();
   void RefreshPushLineRects(const CPVT_WordRange& wr);

   void SetCaretInfo();
   void SetCaretOrigin();

   void AddEditUndoItem(std::unique_ptr<IFX_Edit_UndoItem> pEditUndoItem);

   std::unique_ptr<CPDF_VariableText> m_pVT;
   UnownedPtr<CPWL_EditCtrl> m_pNotify;
   UnownedPtr<CPWL_Edit> m_pOperationNotify;
   std::unique_ptr<CPWL_EditImpl_Provider> m_pVTProvider;
   CPVT_WordPlace m_wpCaret;
   CPVT_WordPlace m_wpOldCaret;
   CPWL_EditImpl_Select m_SelState;
   CFX_PointF m_ptScrollPos;
   CFX_PointF m_ptRefreshScrollPos;
   bool m_bEnableScroll;
   std::unique_ptr<CPWL_EditImpl_Iterator> m_pIterator;
   CPWL_EditImpl_Refresh m_Refresh;
   CFX_PointF m_ptCaret;
   CPWL_EditImpl_Undo m_Undo;
   int32_t m_nAlignment;
   bool m_bNotifyFlag;
   bool m_bEnableOverflow;
   bool m_bEnableRefresh;
   CFX_FloatRect m_rcOldContent;
   bool m_bEnableUndo;
 };

 class CPWL_EditImpl_Iterator {
  public:
   CPWL_EditImpl_Iterator(CPWL_EditImpl* pEdit,
                          CPDF_VariableText::Iterator* pVTIterator);
   ~CPWL_EditImpl_Iterator();

   bool NextWord();
   bool PrevWord();
   bool GetWord(CPVT_Word& word) const;
   bool GetLine(CPVT_Line& line) const;
   void SetAt(int32_t nWordIndex);
   void SetAt(const CPVT_WordPlace& place);
   const CPVT_WordPlace& GetAt() const;

  private:
   UnownedPtr<CPWL_EditImpl> m_pEdit;
   CPDF_VariableText::Iterator* m_pVTIterator;
 };

 class CPWL_EditImpl_Provider : public CPDF_VariableText::Provider {
  public:
   explicit CPWL_EditImpl_Provider(IPVT_FontMap* pFontMap);
   ~CPWL_EditImpl_Provider() override;

   IPVT_FontMap* GetFontMap() const;

   // CPDF_VariableText::Provider:
   int32_t GetCharWidth(int32_t nFontIndex, uint16_t word) override;
   int32_t GetTypeAscent(int32_t nFontIndex) override;
   int32_t GetTypeDescent(int32_t nFontIndex) override;
   int32_t GetWordFontIndex(uint16_t word,
                            int32_t charset,
                            int32_t nFontIndex) override;
   int32_t GetDefaultFontIndex() override;
   bool IsLatinWord(uint16_t word) override;

  private:
   IPVT_FontMap* m_pFontMap;
 };

 #endif  // FPDFSDK_PWL_CPWL_EDIT_IMPL_H_
	// 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_PWL_CPWL_EDIT_IMPL_H_
	#define FPDFSDK_PWL_CPWL_EDIT_IMPL_H_

	#include <deque>
	#include <memory>
	#include <vector>

	#include "core/fpdfdoc/cpdf_variabletext.h"
	#include "core/fpdfdoc/cpvt_wordrange.h"
	#include "core/fxcrt/unowned_ptr.h"

	#define FX_EDIT_ISLATINWORD(u) \
	(u == 0x2D \|\| (u <= 0x005A && u >= 0x0041) \|\| \
	(u <= 0x007A && u >= 0x0061) \|\| (u <= 0x02AF && u >= 0x00C0))

	class CFFL_FormFiller;
	class CPWL_EditImpl;
	class CPWL_EditImpl_Iterator;
	class CPWL_EditImpl_Provider;
	class CFX_RenderDevice;
	class CFX_SystemHandler;
	class CPWL_Edit;
	class CPWL_EditCtrl;
	class IFX_Edit_UndoItem;

	struct CPWL_EditImpl_LineRect {
	CPWL_EditImpl_LineRect(const CPVT_WordRange& wrLine,
	const CFX_FloatRect& rcLine)
	: m_wrLine(wrLine), m_rcLine(rcLine) {}

	CPVT_WordRange m_wrLine;
	CFX_FloatRect m_rcLine;
	};

	class CPWL_EditImpl_LineRectArray {
	public:
	CPWL_EditImpl_LineRectArray();
	~CPWL_EditImpl_LineRectArray();

	void operator=(CPWL_EditImpl_LineRectArray&& rects);
	void Add(const CPVT_WordRange& wrLine, const CFX_FloatRect& rcLine);

	int32_t GetSize() const;
	CPWL_EditImpl_LineRect* GetAt(int32_t nIndex) const;

	private:
	std::vector<std::unique_ptr<CPWL_EditImpl_LineRect>> m_LineRects;
	};

	class CPWL_EditImpl_RectArray {
	public:
	CPWL_EditImpl_RectArray();
	~CPWL_EditImpl_RectArray();

	void Clear();
	void Add(const CFX_FloatRect& rect);

	int32_t GetSize() const;
	CFX_FloatRect* GetAt(int32_t nIndex) const;

	private:
	std::vector<std::unique_ptr<CFX_FloatRect>> m_Rects;
	};

	class CPWL_EditImpl_Refresh {
	public:
	CPWL_EditImpl_Refresh();
	~CPWL_EditImpl_Refresh();

	void BeginRefresh();
	void Push(const CPVT_WordRange& linerange, const CFX_FloatRect& rect);
	void NoAnalyse();
	const CPWL_EditImpl_RectArray* GetRefreshRects() const;
	void EndRefresh();

	private:
	CPWL_EditImpl_LineRectArray m_NewLineRects;
	CPWL_EditImpl_LineRectArray m_OldLineRects;
	CPWL_EditImpl_RectArray m_RefreshRects;
	};

	class CPWL_EditImpl_Select {
	public:
	CPWL_EditImpl_Select();
	explicit CPWL_EditImpl_Select(const CPVT_WordRange& range);

	void Reset();
	void Set(const CPVT_WordPlace& begin, const CPVT_WordPlace& end);
	void SetEndPos(const CPVT_WordPlace& end);

	CPVT_WordRange ConvertToWordRange() const;
	bool IsEmpty() const;

	CPVT_WordPlace BeginPos;
	CPVT_WordPlace EndPos;
	};

	class CPWL_EditImpl_Undo {
	public:
	CPWL_EditImpl_Undo();
	~CPWL_EditImpl_Undo();

	void AddItem(std::unique_ptr<IFX_Edit_UndoItem> pItem);
	void Undo();
	void Redo();
	bool CanUndo() const;
	bool CanRedo() const;

	private:
	void RemoveHeads();
	void RemoveTails();

	std::deque<std::unique_ptr<IFX_Edit_UndoItem>> m_UndoItemStack;
	size_t m_nCurUndoPos;
	bool m_bWorking;
	};

	class IFX_Edit_UndoItem {
	public:
	virtual ~IFX_Edit_UndoItem() {}

	virtual void Undo() = 0;
	virtual void Redo() = 0;
	};

	class CFXEU_InsertWord : public IFX_Edit_UndoItem {
	public:
	CFXEU_InsertWord(CPWL_EditImpl* pEdit,
	const CPVT_WordPlace& wpOldPlace,
	const CPVT_WordPlace& wpNewPlace,
	uint16_t word,
	int32_t charset);
	~CFXEU_InsertWord() override;

	// IFX_Edit_UndoItem:
	void Redo() override;
	void Undo() override;

	private:
	UnownedPtr<CPWL_EditImpl> m_pEdit;

	CPVT_WordPlace m_wpOld;
	CPVT_WordPlace m_wpNew;
	uint16_t m_Word;
	int32_t m_nCharset;
	};

	class CFXEU_InsertReturn : public IFX_Edit_UndoItem {
	public:
	CFXEU_InsertReturn(CPWL_EditImpl* pEdit,
	const CPVT_WordPlace& wpOldPlace,
	const CPVT_WordPlace& wpNewPlace);
	~CFXEU_InsertReturn() override;

	// IFX_Edit_UndoItem:
	void Redo() override;
	void Undo() override;

	private:
	UnownedPtr<CPWL_EditImpl> m_pEdit;

	CPVT_WordPlace m_wpOld;
	CPVT_WordPlace m_wpNew;
	};

	class CFXEU_Backspace : public IFX_Edit_UndoItem {
	public:
	CFXEU_Backspace(CPWL_EditImpl* pEdit,
	const CPVT_WordPlace& wpOldPlace,
	const CPVT_WordPlace& wpNewPlace,
	uint16_t word,
	int32_t charset);
	~CFXEU_Backspace() override;

	// IFX_Edit_UndoItem:
	void Redo() override;
	void Undo() override;

	private:
	UnownedPtr<CPWL_EditImpl> m_pEdit;

	CPVT_WordPlace m_wpOld;
	CPVT_WordPlace m_wpNew;
	uint16_t m_Word;
	int32_t m_nCharset;
	};

	class CFXEU_Delete : public IFX_Edit_UndoItem {
	public:
	CFXEU_Delete(CPWL_EditImpl* pEdit,
	const CPVT_WordPlace& wpOldPlace,
	const CPVT_WordPlace& wpNewPlace,
	uint16_t word,
	int32_t charset,
	bool bSecEnd);
	~CFXEU_Delete() override;

	// IFX_Edit_UndoItem:
	void Redo() override;
	void Undo() override;

	private:
	UnownedPtr<CPWL_EditImpl> m_pEdit;

	CPVT_WordPlace m_wpOld;
	CPVT_WordPlace m_wpNew;
	uint16_t m_Word;
	int32_t m_nCharset;
	bool m_bSecEnd;
	};

	class CFXEU_Clear : public IFX_Edit_UndoItem {
	public:
	CFXEU_Clear(CPWL_EditImpl* pEdit,
	const CPVT_WordRange& wrSel,
	const WideString& swText);
	~CFXEU_Clear() override;

	// IFX_Edit_UndoItem:
	void Redo() override;
	void Undo() override;

	private:
	UnownedPtr<CPWL_EditImpl> m_pEdit;

	CPVT_WordRange m_wrSel;
	WideString m_swText;
	};

	class CFXEU_InsertText : public IFX_Edit_UndoItem {
	public:
	CFXEU_InsertText(CPWL_EditImpl* pEdit,
	const CPVT_WordPlace& wpOldPlace,
	const CPVT_WordPlace& wpNewPlace,
	const WideString& swText,
	int32_t charset);
	~CFXEU_InsertText() override;

	// IFX_Edit_UndoItem:
	void Redo() override;
	void Undo() override;

	private:
	UnownedPtr<CPWL_EditImpl> m_pEdit;

	CPVT_WordPlace m_wpOld;
	CPVT_WordPlace m_wpNew;
	WideString m_swText;
	int32_t m_nCharset;
	};

	class CPWL_EditImpl {
	public:
	static void DrawEdit(CFX_RenderDevice* pDevice,
	const CFX_Matrix& mtUser2Device,
	CPWL_EditImpl* pEdit,
	FX_COLORREF crTextFill,
	const CFX_FloatRect& rcClip,
	const CFX_PointF& ptOffset,
	const CPVT_WordRange* pRange,
	CFX_SystemHandler* pSystemHandler,
	CFFL_FormFiller* pFFLData);

	CPWL_EditImpl();
	~CPWL_EditImpl();

	void SetFontMap(IPVT_FontMap* pFontMap);
	void SetNotify(CPWL_EditCtrl* pNotify);
	void SetOperationNotify(CPWL_Edit* pOperationNotify);

	// Returns an iterator for the contents. Should not be released.
	CPWL_EditImpl_Iterator* GetIterator();
	IPVT_FontMap* GetFontMap();
	void Initialize();

	// Set the bounding box of the text area.
	void SetPlateRect(const CFX_FloatRect& rect);
	void SetScrollPos(const CFX_PointF& point);

	// Set the horizontal text alignment. (nFormat [0:left, 1:middle, 2:right])
	void SetAlignmentH(int32_t nFormat, bool bPaint);
	// Set the vertical text alignment. (nFormat [0:left, 1:middle, 2:right])
	void SetAlignmentV(int32_t nFormat, bool bPaint);

	// Set the substitution character for hidden text.
	void SetPasswordChar(uint16_t wSubWord, bool bPaint);

	// Set the maximum number of words in the text.
	void SetLimitChar(int32_t nLimitChar);
	void SetCharArray(int32_t nCharArray);
	void SetCharSpace(float fCharSpace);
	void SetMultiLine(bool bMultiLine, bool bPaint);
	void SetAutoReturn(bool bAuto, bool bPaint);
	void SetAutoFontSize(bool bAuto, bool bPaint);
	void SetAutoScroll(bool bAuto, bool bPaint);
	void SetFontSize(float fFontSize);
	void SetTextOverflow(bool bAllowed, bool bPaint);
	void OnMouseDown(const CFX_PointF& point, bool bShift, bool bCtrl);
	void OnMouseMove(const CFX_PointF& point, bool bShift, bool bCtrl);
	void OnVK_UP(bool bShift, bool bCtrl);
	void OnVK_DOWN(bool bShift, bool bCtrl);
	void OnVK_LEFT(bool bShift, bool bCtrl);
	void OnVK_RIGHT(bool bShift, bool bCtrl);
	void OnVK_HOME(bool bShift, bool bCtrl);
	void OnVK_END(bool bShift, bool bCtrl);
	void SetText(const WideString& sText);
	bool InsertWord(uint16_t word, int32_t charset);
	bool InsertReturn();
	bool Backspace();
	bool Delete();
	bool ClearSelection();
	bool InsertText(const WideString& sText, int32_t charset);
	bool Redo();
	bool Undo();
	CPVT_WordPlace WordIndexToWordPlace(int32_t index) const;
	CPVT_WordPlace SearchWordPlace(const CFX_PointF& point) const;
	int32_t GetCaret() const;
	CPVT_WordPlace GetCaretWordPlace() const;
	WideString GetSelectedText() const;
	WideString GetText() const;
	float GetFontSize() const;
	uint16_t GetPasswordChar() const;
	CFX_PointF GetScrollPos() const;
	int32_t GetCharArray() const;
	CFX_FloatRect GetContentRect() const;
	WideString GetRangeText(const CPVT_WordRange& range) const;
	int32_t GetHorzScale() const;
	float GetCharSpace() const;
	void SetSelection(int32_t nStartChar, int32_t nEndChar);
	void GetSelection(int32_t& nStartChar, int32_t& nEndChar) const;
	void SelectAll();
	void SelectNone();
	bool IsSelected() const;
	void Paint();
	void EnableRefresh(bool bRefresh);
	void RefreshWordRange(const CPVT_WordRange& wr);
	CPVT_WordRange GetWholeWordRange() const;
	CPVT_WordRange GetSelectWordRange() const;
	void EnableUndo(bool bUndo);
	bool IsTextFull() const;
	bool IsTextOverflow() const;
	bool CanUndo() const;
	bool CanRedo() const;
	CPVT_WordRange GetVisibleWordRange() const;

	bool Empty();

	CPVT_WordPlace DoInsertText(const CPVT_WordPlace& place,
	const WideString& sText,
	int32_t charset);
	int32_t GetCharSetFromUnicode(uint16_t word, int32_t nOldCharset);

	int32_t GetTotalLines() const;

	ByteString GetPDFWordString(int32_t nFontIndex,
	uint16_t Word,
	uint16_t SubWord);

	void SetSelection(const CPVT_WordPlace& begin, const CPVT_WordPlace& end);

	bool Delete(bool bAddUndo, bool bPaint);
	bool Clear(bool bAddUndo, bool bPaint);
	bool InsertText(const WideString& sText,
	int32_t charset,
	bool bAddUndo,
	bool bPaint);
	bool InsertWord(uint16_t word, int32_t charset, bool bAddUndo, bool bPaint);
	bool InsertReturn(bool bAddUndo, bool bPaint);
	bool Backspace(bool bAddUndo, bool bPaint);
	void SetCaret(const CPVT_WordPlace& place);

	CFX_PointF VTToEdit(const CFX_PointF& point) const;

	private:
	void RearrangeAll();
	void RearrangePart(const CPVT_WordRange& range);
	void ScrollToCaret();
	void SetScrollInfo();
	void SetScrollPosX(float fx);
	void SetScrollPosY(float fy);
	void SetScrollLimit();
	void SetContentChanged();

	void PaintInsertText(const CPVT_WordPlace& wpOld,
	const CPVT_WordPlace& wpNew);

	CFX_PointF EditToVT(const CFX_PointF& point) const;
	CFX_FloatRect VTToEdit(const CFX_FloatRect& rect) const;

	void Refresh();
	void RefreshPushLineRects(const CPVT_WordRange& wr);

	void SetCaretInfo();
	void SetCaretOrigin();

	void AddEditUndoItem(std::unique_ptr<IFX_Edit_UndoItem> pEditUndoItem);

	std::unique_ptr<CPDF_VariableText> m_pVT;
	UnownedPtr<CPWL_EditCtrl> m_pNotify;
	UnownedPtr<CPWL_Edit> m_pOperationNotify;
	std::unique_ptr<CPWL_EditImpl_Provider> m_pVTProvider;
	CPVT_WordPlace m_wpCaret;
	CPVT_WordPlace m_wpOldCaret;
	CPWL_EditImpl_Select m_SelState;
	CFX_PointF m_ptScrollPos;
	CFX_PointF m_ptRefreshScrollPos;
	bool m_bEnableScroll;
	std::unique_ptr<CPWL_EditImpl_Iterator> m_pIterator;
	CPWL_EditImpl_Refresh m_Refresh;
	CFX_PointF m_ptCaret;
	CPWL_EditImpl_Undo m_Undo;
	int32_t m_nAlignment;
	bool m_bNotifyFlag;
	bool m_bEnableOverflow;
	bool m_bEnableRefresh;
	CFX_FloatRect m_rcOldContent;
	bool m_bEnableUndo;
	};

	class CPWL_EditImpl_Iterator {
	public:
	CPWL_EditImpl_Iterator(CPWL_EditImpl* pEdit,
	CPDF_VariableText::Iterator* pVTIterator);
	~CPWL_EditImpl_Iterator();

	bool NextWord();
	bool PrevWord();
	bool GetWord(CPVT_Word& word) const;
	bool GetLine(CPVT_Line& line) const;
	void SetAt(int32_t nWordIndex);
	void SetAt(const CPVT_WordPlace& place);
	const CPVT_WordPlace& GetAt() const;

	private:
	UnownedPtr<CPWL_EditImpl> m_pEdit;
	CPDF_VariableText::Iterator* m_pVTIterator;
	};

	class CPWL_EditImpl_Provider : public CPDF_VariableText::Provider {
	public:
	explicit CPWL_EditImpl_Provider(IPVT_FontMap* pFontMap);
	~CPWL_EditImpl_Provider() override;

	IPVT_FontMap* GetFontMap() const;

	// CPDF_VariableText::Provider:
	int32_t GetCharWidth(int32_t nFontIndex, uint16_t word) override;
	int32_t GetTypeAscent(int32_t nFontIndex) override;
	int32_t GetTypeDescent(int32_t nFontIndex) override;
	int32_t GetWordFontIndex(uint16_t word,
	int32_t charset,
	int32_t nFontIndex) override;
	int32_t GetDefaultFontIndex() override;
	bool IsLatinWord(uint16_t word) override;

	private:
	IPVT_FontMap* m_pFontMap;
	};

	#endif // FPDFSDK_PWL_CPWL_EDIT_IMPL_H_