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// 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 XFA_FDE_CFDE_TXTEDTENGINE_H_
#define XFA_FDE_CFDE_TXTEDTENGINE_H_
#include <memory>
#include "xfa/fde/ifde_txtedtengine.h"
class CFDE_TxtEdtBuf;
class CFDE_TxtEdtParag;
class CFX_TxtBreak;
class IFDE_TxtEdtDoRecord;
class IFX_CharIter;
class CFDE_TxtEdtEngine {
public:
CFDE_TxtEdtEngine();
~CFDE_TxtEdtEngine();
void SetEditParams(const FDE_TXTEDTPARAMS& params);
FDE_TXTEDTPARAMS* GetEditParams();
int32_t CountPages() const;
IFDE_TxtEdtPage* GetPage(int32_t nIndex);
void SetTextByStream(IFX_Stream* pStream);
void SetText(const CFX_WideString& wsText);
int32_t GetTextLength() const;
CFX_WideString GetText(int32_t nStart, int32_t nCount = -1) const;
void ClearText();
int32_t GetCaretRect(CFX_RectF& rtCaret) const;
int32_t GetCaretPos() const;
int32_t SetCaretPos(int32_t nIndex, bool bBefore);
int32_t MoveCaretPos(FDE_TXTEDTMOVECARET eMoveCaret,
bool bShift = false,
bool bCtrl = false);
void Lock();
void Unlock();
bool IsLocked() const;
int32_t Insert(int32_t nStart, const FX_WCHAR* lpText, int32_t nLength);
int32_t Delete(int32_t nStart, bool bBackspace = false);
int32_t DeleteRange(int32_t nStart, int32_t nCount = -1);
int32_t Replace(int32_t nStart,
int32_t nLength,
const CFX_WideString& wsReplace);
void SetLimit(int32_t nLimit);
void SetAliasChar(FX_WCHAR wcAlias);
void RemoveSelRange(int32_t nStart, int32_t nCount = -1);
void AddSelRange(int32_t nStart, int32_t nCount = -1);
int32_t CountSelRanges() const;
int32_t GetSelRange(int32_t nIndex, int32_t& nStart) const;
void ClearSelection();
bool Redo(const IFDE_TxtEdtDoRecord* pRecord);
bool Undo(const IFDE_TxtEdtDoRecord* pRecord);
int32_t StartLayout();
int32_t DoLayout(IFX_Pause* pPause);
void EndLayout();
bool Optimize(IFX_Pause* pPause = nullptr);
int32_t CountParags() const;
CFDE_TxtEdtParag* GetParag(int32_t nParagIndex) const;
IFX_CharIter* CreateCharIter();
CFDE_TxtEdtBuf* GetTextBuf() const;
int32_t GetTextBufLength() const;
CFX_TxtBreak* GetTextBreak() const;
int32_t GetLineCount() const;
int32_t GetPageLineCount() const;
int32_t Line2Parag(int32_t nStartParag,
int32_t nStartLineofParag,
int32_t nLineIndex,
int32_t& nStartLine) const;
FX_WCHAR GetAliasChar() const { return m_wcAliasChar; }
private:
friend class CFDE_TxtEdtDoRecord_Insert;
friend class CFDE_TxtEdtDoRecord_DeleteRange;
friend class CFDE_TxtEdtPage;
struct FDE_TXTEDTSELRANGE {
int32_t nStart;
int32_t nCount;
};
struct FDE_TXTEDTPARAGPOS {
int32_t nParagIndex;
int32_t nCharIndex;
};
void Inner_Insert(int32_t nStart, const FX_WCHAR* lpText, int32_t nLength);
CFX_WideString GetPreDeleteText(int32_t nIndex, int32_t nLength);
CFX_WideString GetPreInsertText(int32_t nIndex,
const FX_WCHAR* lpText,
int32_t nLength);
CFX_WideString GetPreReplaceText(int32_t nIndex,
int32_t nOriginLength,
const FX_WCHAR* lpText,
int32_t nLength);
void Inner_DeleteRange(int32_t nStart, int32_t nCount = -1);
void DeleteRange_DoRecord(int32_t nStart, int32_t nCount, bool bSel = false);
void ResetEngine();
void RebuildParagraphs();
void RemoveAllParags();
void RemoveAllPages();
void UpdateParags();
void UpdatePages();
void UpdateTxtBreak();
bool ReplaceParagEnd(FX_WCHAR*& lpText,
int32_t& nLength,
bool bPreIsCR = false);
void RecoverParagEnd(CFX_WideString& wsText) const;
int32_t MovePage2Char(int32_t nIndex);
void TextPos2ParagPos(int32_t nIndex, FDE_TXTEDTPARAGPOS& ParagPos) const;
int32_t MoveForward(bool& bBefore);
int32_t MoveBackward(bool& bBefore);
bool MoveUp(CFX_PointF& ptCaret);
bool MoveDown(CFX_PointF& ptCaret);
bool MoveLineStart();
bool MoveLineEnd();
bool MoveParagStart();
bool MoveParagEnd();
bool MoveHome();
bool MoveEnd();
bool IsFitArea(CFX_WideString& wsText);
void UpdateCaretRect(int32_t nIndex, bool bBefore = true);
void GetCaretRect(CFX_RectF& rtCaret,
int32_t nPageIndex,
int32_t nCaret,
bool bBefore = true);
void UpdateCaretIndex(const CFX_PointF& ptCaret);
bool IsSelect();
void DeleteSelect();
std::unique_ptr<CFDE_TxtEdtBuf> m_pTxtBuf;
std::unique_ptr<CFX_TxtBreak> m_pTextBreak;
FDE_TXTEDTPARAMS m_Param;
CFX_ArrayTemplate<IFDE_TxtEdtPage*> m_PagePtrArray;
CFX_ArrayTemplate<CFDE_TxtEdtParag*> m_ParagPtrArray;
CFX_ArrayTemplate<FDE_TXTEDTSELRANGE*> m_SelRangePtrArr;
int32_t m_nPageLineCount;
int32_t m_nLineCount;
int32_t m_nAnchorPos;
int32_t m_nLayoutPos;
FX_FLOAT m_fCaretPosReserve;
int32_t m_nCaret;
bool m_bBefore;
int32_t m_nCaretPage;
CFX_RectF m_rtCaret;
uint32_t m_dwFindFlags;
bool m_bLock;
int32_t m_nLimit;
FX_WCHAR m_wcAliasChar;
int32_t m_nFirstLineEnd;
bool m_bAutoLineEnd;
FX_WCHAR m_wLineEnd;
FDE_TXTEDT_TEXTCHANGE_INFO m_ChangeInfo;
};
#endif // XFA_FDE_CFDE_TXTEDTENGINE_H_
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