// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef XFA_FDE_CFDE_TXTEDTBUF_H_
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#define XFA_FDE_CFDE_TXTEDTBUF_H_
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#include "core/fxcrt/include/fx_basic.h"
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#include "core/fxcrt/include/fx_system.h"
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class IFX_MemoryAllocator;
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class IFX_Pause;
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class CFDE_TxtEdtBuf {
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public:
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CFDE_TxtEdtBuf();
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~CFDE_TxtEdtBuf();
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int32_t GetChunkSize() const;
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int32_t GetTextLength() const;
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void SetText(const CFX_WideString& wsText);
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void GetText(CFX_WideString& wsText) const;
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FX_WCHAR GetCharByIndex(int32_t nIndex) const;
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void GetRange(CFX_WideString& wsText,
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int32_t nBegin,
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int32_t nCount = -1) const;
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void Insert(int32_t nPos, const FX_WCHAR* lpText, int32_t nLength = 1);
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void Delete(int32_t nIndex, int32_t nLength = 1);
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void Clear(FX_BOOL bRelease = TRUE);
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FX_BOOL Optimize(IFX_Pause* pPause = nullptr);
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private:
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friend class CFDE_TxtEdtBufIter;
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struct FDE_CHUNKHEADER {
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int32_t nUsed;
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FX_WCHAR wChars[1];
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};
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struct FDE_CHUNKPLACE {
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int32_t nChunkIndex;
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int32_t nCharIndex;
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};
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void ResetChunkBuffer(int32_t nDefChunkCount, int32_t nChunkSize);
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int32_t CP2Index(const FDE_CHUNKPLACE& cp) const;
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void Index2CP(int32_t nIndex, FDE_CHUNKPLACE& cp) const;
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int32_t m_nChunkSize;
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int32_t m_nTotal;
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FX_BOOL m_bChanged;
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CFX_ArrayTemplate<FDE_CHUNKHEADER*> m_Chunks;
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IFX_MemoryAllocator* m_pAllocator;
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};
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#endif // XFA_FDE_CFDE_TXTEDTBUF_H_
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