| // 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, |
| FX_DWORD& 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, FX_DWORD offset); |
| FX_DWORD GetItemLength(int index, const std::vector<FX_FILESIZE>& szArray); |
| |
| private: |
| int ReadPrimaryHintStreamOffset() const; |
| int ReadPrimaryHintStreamLength() const; |
| |
| CPDF_Dictionary* m_pLinearizedDict; |
| CPDF_DataAvail* m_pDataAvail; |
| FX_DWORD m_nFirstPageSharedObjs; |
| FX_FILESIZE m_szFirstPageObjOffset; |
| CFX_ArrayTemplate<FX_DWORD> m_dwDeltaNObjsArray; |
| CFX_ArrayTemplate<FX_DWORD> m_dwNSharedObjsArray; |
| CFX_ArrayTemplate<FX_DWORD> m_dwSharedObjNumArray; |
| CFX_ArrayTemplate<FX_DWORD> m_dwIdentifierArray; |
| std::vector<FX_FILESIZE> m_szPageOffsetArray; |
| std::vector<FX_FILESIZE> m_szSharedObjOffsetArray; |
| }; |
| |
| #endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_HINT_TABLES_H_ |