// 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_TXTEDTBUF_H_ #define XFA_FDE_CFDE_TXTEDTBUF_H_ #include "core/fxcrt/include/fx_basic.h" #include "core/fxcrt/include/fx_system.h" class IFX_MemoryAllocator; class IFX_Pause; class CFDE_TxtEdtBuf { public: CFDE_TxtEdtBuf(); ~CFDE_TxtEdtBuf(); int32_t GetChunkSize() const; int32_t GetTextLength() const; void SetText(const CFX_WideString& wsText); void GetText(CFX_WideString& wsText) const; FX_WCHAR GetCharByIndex(int32_t nIndex) const; void GetRange(CFX_WideString& wsText, int32_t nBegin, int32_t nCount = -1) const; void Insert(int32_t nPos, const FX_WCHAR* lpText, int32_t nLength = 1); void Delete(int32_t nIndex, int32_t nLength = 1); void Clear(FX_BOOL bRelease = TRUE); FX_BOOL Optimize(IFX_Pause* pPause = nullptr); private: friend class CFDE_TxtEdtBufIter; struct FDE_CHUNKHEADER { int32_t nUsed; FX_WCHAR wChars[1]; }; struct FDE_CHUNKPLACE { int32_t nChunkIndex; int32_t nCharIndex; }; void ResetChunkBuffer(int32_t nDefChunkCount, int32_t nChunkSize); int32_t CP2Index(const FDE_CHUNKPLACE& cp) const; void Index2CP(int32_t nIndex, FDE_CHUNKPLACE& cp) const; int32_t m_nChunkSize; int32_t m_nTotal; FX_BOOL m_bChanged; CFX_ArrayTemplate<FDE_CHUNKHEADER*> m_Chunks; IFX_MemoryAllocator* m_pAllocator; }; #endif // XFA_FDE_CFDE_TXTEDTBUF_H_