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1 // Copyright 2016 PDFium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | |
6 | |
7 #ifndef CORE_FPDFAPI_FPDF_PARSER_CPDF_HINT_TABLES_H_ | |
8 #define CORE_FPDFAPI_FPDF_PARSER_CPDF_HINT_TABLES_H_ | |
9 | |
10 #include <vector> | |
11 | |
12 #include "core/fpdfapi/fpdf_parser/cpdf_data_avail.h" | |
13 #include "core/fxcrt/fx_basic.h" | |
14 #include "core/fxcrt/fx_stream.h" | |
15 | |
16 class CFX_BitStream; | |
17 class CPDF_Dictionary; | |
18 class CPDF_Stream; | |
19 | |
20 class CPDF_HintTables { | |
21 public: | |
22 CPDF_HintTables(CPDF_DataAvail* pDataAvail, CPDF_Dictionary* pLinearized); | |
23 virtual ~CPDF_HintTables(); | |
24 | |
25 bool GetPagePos(uint32_t index, | |
26 FX_FILESIZE* szPageStartPos, | |
27 FX_FILESIZE* szPageLength, | |
28 uint32_t* dwObjNum); | |
29 | |
30 CPDF_DataAvail::DocAvailStatus CheckPage( | |
31 uint32_t index, | |
32 CPDF_DataAvail::DownloadHints* pHints); | |
33 | |
34 bool LoadHintStream(CPDF_Stream* pHintStream); | |
35 | |
36 protected: | |
37 bool ReadPageHintTable(CFX_BitStream* hStream); | |
38 bool ReadSharedObjHintTable(CFX_BitStream* hStream, uint32_t offset); | |
39 | |
40 private: | |
41 // Tests can override. | |
42 virtual int GetEndOfFirstPageOffset() const; | |
43 virtual int GetNumberOfPages() const; | |
44 virtual int GetFirstPageObjectNumber() const; | |
45 virtual int GetFirstPageNumber() const; | |
46 virtual int ReadPrimaryHintStreamOffset() const; | |
47 virtual int ReadPrimaryHintStreamLength() const; | |
48 | |
49 // Helper for the ReadPrimaryHintStream methods above. | |
50 int ReadPrimaryHintStream(int index) const; | |
51 | |
52 uint32_t GetItemLength(uint32_t index, | |
53 const std::vector<FX_FILESIZE>& szArray); | |
54 | |
55 // Owner, outlives this object. | |
56 CPDF_DataAvail* const m_pDataAvail; | |
57 | |
58 // Owned by |m_pDataAvail|. | |
59 CPDF_Dictionary* const m_pLinearizedDict; | |
60 | |
61 uint32_t m_nFirstPageSharedObjs; | |
62 FX_FILESIZE m_szFirstPageObjOffset; | |
63 std::vector<uint32_t> m_dwDeltaNObjsArray; | |
64 std::vector<uint32_t> m_dwNSharedObjsArray; | |
65 std::vector<uint32_t> m_dwSharedObjNumArray; | |
66 std::vector<uint32_t> m_dwIdentifierArray; | |
67 std::vector<FX_FILESIZE> m_szPageOffsetArray; | |
68 std::vector<FX_FILESIZE> m_szSharedObjOffsetArray; | |
69 }; | |
70 | |
71 #endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_HINT_TABLES_H_ | |
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