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// Copyright 2016 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 CORE_FPDFAPI_FPDF_PARSER_CPDF_HINT_TABLES_H_
#define CORE_FPDFAPI_FPDF_PARSER_CPDF_HINT_TABLES_H_
#include <vector>
#include "core/fpdfapi/fpdf_parser/include/ipdf_data_avail.h"
#include "core/fxcrt/include/fx_basic.h"
#include "core/fxcrt/include/fx_stream.h"
class CFX_BitStream;
class CPDF_DataAvail;
class CPDF_Dictionary;
class CPDF_Stream;
class CPDF_HintTables {
public:
CPDF_HintTables(CPDF_DataAvail* pDataAvail, CPDF_Dictionary* pLinearized)
: m_pLinearizedDict(pLinearized),
m_pDataAvail(pDataAvail),
m_nFirstPageSharedObjs(0),
m_szFirstPageObjOffset(0) {}
~CPDF_HintTables();
FX_BOOL GetPagePos(int index,
FX_FILESIZE& szPageStartPos,
FX_FILESIZE& szPageLength,
uint32_t& dwObjNum);
IPDF_DataAvail::DocAvailStatus CheckPage(
int index,
IPDF_DataAvail::DownloadHints* pHints);
FX_BOOL LoadHintStream(CPDF_Stream* pHintStream);
protected:
FX_BOOL ReadPageHintTable(CFX_BitStream* hStream);
FX_BOOL ReadSharedObjHintTable(CFX_BitStream* hStream, uint32_t offset);
uint32_t GetItemLength(int index, const std::vector<FX_FILESIZE>& szArray);
private:
int ReadPrimaryHintStreamOffset() const;
int ReadPrimaryHintStreamLength() const;
CPDF_Dictionary* m_pLinearizedDict;
CPDF_DataAvail* m_pDataAvail;
uint32_t m_nFirstPageSharedObjs;
FX_FILESIZE m_szFirstPageObjOffset;
CFX_ArrayTemplate<uint32_t> m_dwDeltaNObjsArray;
CFX_ArrayTemplate<uint32_t> m_dwNSharedObjsArray;
CFX_ArrayTemplate<uint32_t> m_dwSharedObjNumArray;
CFX_ArrayTemplate<uint32_t> m_dwIdentifierArray;
std::vector<FX_FILESIZE> m_szPageOffsetArray;
std::vector<FX_FILESIZE> m_szSharedObjOffsetArray;
};
#endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_HINT_TABLES_H_
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