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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_TXTEDTBUF_H_
#define XFA_FDE_CFDE_TXTEDTBUF_H_
#include <memory>
#include <tuple>
#include <vector>
#include "core/fxcrt/fx_basic.h"
#include "core/fxcrt/fx_system.h"
#include "core/fxcrt/ifx_chariter.h"
class CFDE_TxtEdtBuf {
public:
class Iterator : public IFX_CharIter {
public:
Iterator(CFDE_TxtEdtBuf* pBuf, wchar_t wcAlias);
~Iterator() override;
bool Next(bool bPrev = false) override;
wchar_t GetChar() const override;
void SetAt(int32_t nIndex) override;
int32_t GetAt() const override;
bool IsEOF(bool bTail = true) const override;
std::unique_ptr<IFX_CharIter> Clone() const override;
private:
CFDE_TxtEdtBuf* m_pBuf;
int32_t m_nCurChunk;
int32_t m_nCurIndex;
int32_t m_nIndex;
wchar_t m_Alias;
};
CFDE_TxtEdtBuf();
~CFDE_TxtEdtBuf();
int32_t GetTextLength() const { return m_nTotal; }
void SetText(const CFX_WideString& wsText);
CFX_WideString GetText() const { return GetRange(0, m_nTotal); }
wchar_t GetCharByIndex(int32_t nIndex) const;
CFX_WideString GetRange(int32_t nBegin, int32_t nCount) const;
void Insert(int32_t nPos, const CFX_WideString& wsText);
void Delete(int32_t nIndex, int32_t nLength);
void Clear(bool bRelease);
void SetChunkSizeForTesting(size_t size);
size_t GetChunkCountForTesting() const { return m_chunks.size(); }
private:
class ChunkHeader {
public:
ChunkHeader();
~ChunkHeader();
int32_t nUsed;
std::unique_ptr<wchar_t, FxFreeDeleter> wChars;
};
std::tuple<int32_t, int32_t> Index2CP(int32_t nIndex) const;
std::unique_ptr<ChunkHeader> NewChunk();
int32_t m_chunkSize;
int32_t m_nTotal;
std::vector<std::unique_ptr<ChunkHeader>> m_chunks;
};
#endif // XFA_FDE_CFDE_TXTEDTBUF_H_
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