fpdfsdk/pwl/cpwl_edit_impl.h - pdfium.git - Git at Google


            
            // 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"

            
            #include "core/fxge/fx_dib.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_Refresh {

            
             public:

            
              CPWL_EditImpl_Refresh();

            
              ~CPWL_EditImpl_Refresh();


              void BeginRefresh();

            
              void Push(const CPVT_WordRange& linerange, const CFX_FloatRect& rect);

            
              void NoAnalyse();

            
              std::vector<CFX_FloatRect>* GetRefreshRects();

            
              void EndRefresh();


             private:

            
              void Add(const CFX_FloatRect& new_rect);


              std::vector<CPWL_EditImpl_LineRect> m_NewLineRects;

            
              std::vector<CPWL_EditImpl_LineRect> m_OldLineRects;

            
              std::vector<CFX_FloatRect> 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() = default;


              virtual void Undo() = 0;

            
              virtual void Redo() = 0;

            
            };


            class CFXEU_InsertWord final : 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 final : 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 final : 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 final : 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 final : 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 final : 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;

            
              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<CPWL_EditImpl_Provider> m_pVTProvider;

            
              std::unique_ptr<CPDF_VariableText> m_pVT;  // Must outlive |m_pVTProvider|.

            
              UnownedPtr<CPWL_EditCtrl> m_pNotify;

            
              UnownedPtr<CPWL_Edit> m_pOperationNotify;

            
              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 final : public CPDF_VariableText::Provider {

            
             public:

            
              explicit CPWL_EditImpl_Provider(IPVT_FontMap* pFontMap);

            
              ~CPWL_EditImpl_Provider() override;


              IPVT_FontMap* GetFontMap() const;


              // CPDF_VariableText::Provider:

            
              uint32_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"
	#include "core/fxge/fx_dib.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_Refresh {
	public:
	CPWL_EditImpl_Refresh();
	~CPWL_EditImpl_Refresh();

	void BeginRefresh();
	void Push(const CPVT_WordRange& linerange, const CFX_FloatRect& rect);
	void NoAnalyse();
	std::vector<CFX_FloatRect>* GetRefreshRects();
	void EndRefresh();

	private:
	void Add(const CFX_FloatRect& new_rect);

	std::vector<CPWL_EditImpl_LineRect> m_NewLineRects;
	std::vector<CPWL_EditImpl_LineRect> m_OldLineRects;
	std::vector<CFX_FloatRect> 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() = default;

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

	class CFXEU_InsertWord final : 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 final : 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 final : 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 final : 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 final : 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 final : 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;
	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<CPWL_EditImpl_Provider> m_pVTProvider;
	std::unique_ptr<CPDF_VariableText> m_pVT; // Must outlive \|m_pVTProvider\|.
	UnownedPtr<CPWL_EditCtrl> m_pNotify;
	UnownedPtr<CPWL_Edit> m_pOperationNotify;
	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 final : public CPDF_VariableText::Provider {
	public:
	explicit CPWL_EditImpl_Provider(IPVT_FontMap* pFontMap);
	~CPWL_EditImpl_Provider() override;

	IPVT_FontMap* GetFontMap() const;

	// CPDF_VariableText::Provider:
	uint32_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_