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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_PARSER_CPDF_HINT_TABLES_H_
#define CORE_FPDFAPI_PARSER_CPDF_HINT_TABLES_H_
#include <vector>
#include "core/fpdfapi/parser/cpdf_data_avail.h"
#include "core/fxcrt/cfx_unowned_ptr.h"
#include "core/fxcrt/fx_basic.h"
#include "core/fxcrt/fx_stream.h"
class CFX_BitStream;
class CPDF_LinearizedHeader;
class CPDF_Stream;
class CPDF_HintTables {
public:
CPDF_HintTables(CPDF_DataAvail* pDataAvail,
CPDF_LinearizedHeader* pLinearized);
virtual ~CPDF_HintTables();
bool GetPagePos(uint32_t index,
FX_FILESIZE* szPageStartPos,
FX_FILESIZE* szPageLength,
uint32_t* dwObjNum);
CPDF_DataAvail::DocAvailStatus CheckPage(
uint32_t index,
CPDF_DataAvail::DownloadHints* pHints);
bool LoadHintStream(CPDF_Stream* pHintStream);
protected:
bool ReadPageHintTable(CFX_BitStream* hStream);
bool ReadSharedObjHintTable(CFX_BitStream* hStream, uint32_t offset);
private:
// Tests can override.
virtual int GetEndOfFirstPageOffset() const;
virtual int GetNumberOfPages() const;
virtual int GetFirstPageObjectNumber() const;
virtual int GetFirstPageNumber() const;
virtual int ReadPrimaryHintStreamOffset() const;
virtual int ReadPrimaryHintStreamLength() const;
uint32_t GetItemLength(uint32_t index,
const std::vector<FX_FILESIZE>& szArray);
// Owner, outlives this object.
CFX_UnownedPtr<CPDF_DataAvail> const m_pDataAvail;
// Owned by |m_pDataAvail|.
CFX_UnownedPtr<CPDF_LinearizedHeader> const m_pLinearized;
uint32_t m_nFirstPageSharedObjs;
FX_FILESIZE m_szFirstPageObjOffset;
std::vector<uint32_t> m_dwDeltaNObjsArray;
std::vector<uint32_t> m_dwNSharedObjsArray;
std::vector<uint32_t> m_dwSharedObjNumArray;
std::vector<uint32_t> m_dwIdentifierArray;
std::vector<FX_FILESIZE> m_szPageOffsetArray;
std::vector<FX_FILESIZE> m_szSharedObjOffsetArray;
};
#endif // CORE_FPDFAPI_PARSER_CPDF_HINT_TABLES_H_
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