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