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1 // Copyright 2016 PDFium Authors. All rights reserved. | 1 // Copyright 2016 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #include "core/fpdfapi/parser/cpdf_data_avail.h" | 7 #include "core/fpdfapi/parser/cpdf_data_avail.h" |
8 | 8 |
9 #include <algorithm> | 9 #include <algorithm> |
10 #include <memory> | 10 #include <memory> |
11 #include <utility> | 11 #include <utility> |
12 | 12 |
13 #include "core/fpdfapi/cpdf_modulemgr.h" | 13 #include "core/fpdfapi/cpdf_modulemgr.h" |
14 #include "core/fpdfapi/parser/cpdf_array.h" | 14 #include "core/fpdfapi/parser/cpdf_array.h" |
15 #include "core/fpdfapi/parser/cpdf_dictionary.h" | 15 #include "core/fpdfapi/parser/cpdf_dictionary.h" |
16 #include "core/fpdfapi/parser/cpdf_document.h" | 16 #include "core/fpdfapi/parser/cpdf_document.h" |
17 #include "core/fpdfapi/parser/cpdf_hint_tables.h" | 17 #include "core/fpdfapi/parser/cpdf_hint_tables.h" |
18 #include "core/fpdfapi/parser/cpdf_linearized.h" | |
19 #include "core/fpdfapi/parser/cpdf_name.h" | 18 #include "core/fpdfapi/parser/cpdf_name.h" |
20 #include "core/fpdfapi/parser/cpdf_number.h" | 19 #include "core/fpdfapi/parser/cpdf_number.h" |
21 #include "core/fpdfapi/parser/cpdf_reference.h" | 20 #include "core/fpdfapi/parser/cpdf_reference.h" |
22 #include "core/fpdfapi/parser/cpdf_stream.h" | 21 #include "core/fpdfapi/parser/cpdf_stream.h" |
23 #include "core/fpdfapi/parser/fpdf_parser_utility.h" | 22 #include "core/fpdfapi/parser/fpdf_parser_utility.h" |
24 #include "core/fxcrt/fx_ext.h" | 23 #include "core/fxcrt/fx_ext.h" |
25 #include "core/fxcrt/fx_safe_types.h" | 24 #include "core/fxcrt/fx_safe_types.h" |
26 #include "third_party/base/stl_util.h" | 25 #include "third_party/base/stl_util.h" |
27 | 26 |
28 CPDF_DataAvail::FileAvail::~FileAvail() {} | 27 CPDF_DataAvail::FileAvail::~FileAvail() {} |
29 | 28 |
30 CPDF_DataAvail::DownloadHints::~DownloadHints() {} | 29 CPDF_DataAvail::DownloadHints::~DownloadHints() {} |
31 | 30 |
32 // static | 31 // static |
33 int CPDF_DataAvail::s_CurrentDataAvailRecursionDepth = 0; | 32 int CPDF_DataAvail::s_CurrentDataAvailRecursionDepth = 0; |
34 | 33 |
35 CPDF_DataAvail::CPDF_DataAvail(FileAvail* pFileAvail, | 34 CPDF_DataAvail::CPDF_DataAvail(FileAvail* pFileAvail, |
36 IFX_SeekableReadStream* pFileRead, | 35 IFX_SeekableReadStream* pFileRead, |
37 bool bSupportHintTable) | 36 bool bSupportHintTable) |
38 : m_pFileAvail(pFileAvail), m_pFileRead(pFileRead) { | 37 : m_pFileAvail(pFileAvail), m_pFileRead(pFileRead) { |
39 m_Pos = 0; | 38 m_Pos = 0; |
40 m_dwFileLen = 0; | 39 m_dwFileLen = 0; |
41 if (m_pFileRead) { | 40 if (m_pFileRead) { |
42 m_dwFileLen = (uint32_t)m_pFileRead->GetSize(); | 41 m_dwFileLen = (uint32_t)m_pFileRead->GetSize(); |
43 } | 42 } |
44 m_dwCurrentOffset = 0; | 43 m_dwCurrentOffset = 0; |
45 m_dwXRefOffset = 0; | 44 m_dwXRefOffset = 0; |
46 m_bufferOffset = 0; | 45 m_bufferOffset = 0; |
| 46 m_dwFirstPageNo = 0; |
47 m_bufferSize = 0; | 47 m_bufferSize = 0; |
48 m_PagesObjNum = 0; | 48 m_PagesObjNum = 0; |
49 m_dwCurrentXRefSteam = 0; | 49 m_dwCurrentXRefSteam = 0; |
50 m_dwAcroFormObjNum = 0; | 50 m_dwAcroFormObjNum = 0; |
51 m_dwInfoObjNum = 0; | 51 m_dwInfoObjNum = 0; |
52 m_pDocument = 0; | 52 m_pDocument = 0; |
53 m_dwEncryptObjNum = 0; | 53 m_dwEncryptObjNum = 0; |
54 m_dwPrevXRefOffset = 0; | 54 m_dwPrevXRefOffset = 0; |
55 m_dwLastXRefOffset = 0; | 55 m_dwLastXRefOffset = 0; |
56 m_bDocAvail = false; | 56 m_bDocAvail = false; |
57 m_bMainXRefLoadTried = false; | 57 m_bMainXRefLoadTried = false; |
58 m_bDocAvail = false; | 58 m_bDocAvail = false; |
| 59 m_bLinearized = false; |
59 m_bPagesLoad = false; | 60 m_bPagesLoad = false; |
60 m_bPagesTreeLoad = false; | 61 m_bPagesTreeLoad = false; |
61 m_bMainXRefLoadedOK = false; | 62 m_bMainXRefLoadedOK = false; |
62 m_bAnnotsLoad = false; | 63 m_bAnnotsLoad = false; |
63 m_bHaveAcroForm = false; | 64 m_bHaveAcroForm = false; |
64 m_bAcroFormLoad = false; | 65 m_bAcroFormLoad = false; |
65 m_bPageLoadedOK = false; | 66 m_bPageLoadedOK = false; |
66 m_bNeedDownLoadResource = false; | 67 m_bNeedDownLoadResource = false; |
67 m_bLinearizedFormParamLoad = false; | 68 m_bLinearizedFormParamLoad = false; |
| 69 m_pLinearized = nullptr; |
68 m_pRoot = nullptr; | 70 m_pRoot = nullptr; |
69 m_pTrailer = nullptr; | 71 m_pTrailer = nullptr; |
70 m_pCurrentParser = nullptr; | 72 m_pCurrentParser = nullptr; |
71 m_pAcroForm = nullptr; | 73 m_pAcroForm = nullptr; |
72 m_pPageDict = nullptr; | 74 m_pPageDict = nullptr; |
73 m_pPageResource = nullptr; | 75 m_pPageResource = nullptr; |
74 m_docStatus = PDF_DATAAVAIL_HEADER; | 76 m_docStatus = PDF_DATAAVAIL_HEADER; |
75 m_parser.m_bOwnFileRead = false; | 77 m_parser.m_bOwnFileRead = false; |
76 m_bTotalLoadPageTree = false; | 78 m_bTotalLoadPageTree = false; |
77 m_bCurPageDictLoadOK = false; | 79 m_bCurPageDictLoadOK = false; |
78 m_bLinearedDataOK = false; | 80 m_bLinearedDataOK = false; |
79 m_bSupportHintTable = bSupportHintTable; | 81 m_bSupportHintTable = bSupportHintTable; |
80 } | 82 } |
81 | 83 |
82 CPDF_DataAvail::~CPDF_DataAvail() { | 84 CPDF_DataAvail::~CPDF_DataAvail() { |
83 m_pHintTables.reset(); | 85 m_pHintTables.reset(); |
| 86 delete m_pLinearized; |
| 87 delete m_pRoot; |
| 88 delete m_pTrailer; |
84 | 89 |
85 for (CPDF_Object* pObject : m_arrayAcroforms) | 90 for (CPDF_Object* pObject : m_arrayAcroforms) |
86 delete pObject; | 91 delete pObject; |
87 } | 92 } |
88 | 93 |
89 void CPDF_DataAvail::SetDocument(CPDF_Document* pDoc) { | 94 void CPDF_DataAvail::SetDocument(CPDF_Document* pDoc) { |
90 m_pDocument = pDoc; | 95 m_pDocument = pDoc; |
91 } | 96 } |
92 | 97 |
93 uint32_t CPDF_DataAvail::GetObjectSize(uint32_t objnum, FX_FILESIZE& offset) { | 98 uint32_t CPDF_DataAvail::GetObjectSize(uint32_t objnum, FX_FILESIZE& offset) { |
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601 m_docStatus = PDF_DATAAVAIL_END; | 606 m_docStatus = PDF_DATAAVAIL_END; |
602 } | 607 } |
603 return true; | 608 return true; |
604 } | 609 } |
605 | 610 |
606 pHints->AddSegment(0, kReqSize); | 611 pHints->AddSegment(0, kReqSize); |
607 return false; | 612 return false; |
608 } | 613 } |
609 | 614 |
610 bool CPDF_DataAvail::CheckFirstPage(DownloadHints* pHints) { | 615 bool CPDF_DataAvail::CheckFirstPage(DownloadHints* pHints) { |
611 if (!m_pLinearized->GetFirstPageEndOffset() || | 616 CPDF_Dictionary* pDict = m_pLinearized->GetDict(); |
612 !m_pLinearized->GetFileSize() || !m_pLinearized->GetLastXRefOffset()) { | 617 CPDF_Object* pEndOffSet = pDict ? pDict->GetObjectFor("E") : nullptr; |
| 618 if (!pEndOffSet) { |
| 619 m_docStatus = PDF_DATAAVAIL_ERROR; |
| 620 return false; |
| 621 } |
| 622 |
| 623 CPDF_Object* pXRefOffset = pDict ? pDict->GetObjectFor("T") : nullptr; |
| 624 if (!pXRefOffset) { |
| 625 m_docStatus = PDF_DATAAVAIL_ERROR; |
| 626 return false; |
| 627 } |
| 628 |
| 629 CPDF_Object* pFileLen = pDict ? pDict->GetObjectFor("L") : nullptr; |
| 630 if (!pFileLen) { |
613 m_docStatus = PDF_DATAAVAIL_ERROR; | 631 m_docStatus = PDF_DATAAVAIL_ERROR; |
614 return false; | 632 return false; |
615 } | 633 } |
616 | 634 |
617 bool bNeedDownLoad = false; | 635 bool bNeedDownLoad = false; |
618 uint32_t dwEnd = m_pLinearized->GetFirstPageEndOffset(); | 636 if (pEndOffSet->IsNumber()) { |
619 dwEnd += 512; | 637 uint32_t dwEnd = pEndOffSet->GetInteger(); |
620 if ((FX_FILESIZE)dwEnd > m_dwFileLen) | 638 dwEnd += 512; |
621 dwEnd = (uint32_t)m_dwFileLen; | 639 if ((FX_FILESIZE)dwEnd > m_dwFileLen) |
| 640 dwEnd = (uint32_t)m_dwFileLen; |
622 | 641 |
623 int32_t iStartPos = (int32_t)(m_dwFileLen > 1024 ? 1024 : m_dwFileLen); | 642 int32_t iStartPos = (int32_t)(m_dwFileLen > 1024 ? 1024 : m_dwFileLen); |
624 int32_t iSize = dwEnd > 1024 ? dwEnd - 1024 : 0; | 643 int32_t iSize = dwEnd > 1024 ? dwEnd - 1024 : 0; |
625 if (!m_pFileAvail->IsDataAvail(iStartPos, iSize)) { | 644 if (!m_pFileAvail->IsDataAvail(iStartPos, iSize)) { |
626 pHints->AddSegment(iStartPos, iSize); | 645 pHints->AddSegment(iStartPos, iSize); |
627 bNeedDownLoad = true; | 646 bNeedDownLoad = true; |
| 647 } |
628 } | 648 } |
629 | 649 |
630 m_dwLastXRefOffset = m_pLinearized->GetLastXRefOffset(); | 650 m_dwLastXRefOffset = 0; |
631 FX_FILESIZE dwFileLen = m_pLinearized->GetFileSize(); | 651 FX_FILESIZE dwFileLen = 0; |
| 652 if (pXRefOffset->IsNumber()) |
| 653 m_dwLastXRefOffset = pXRefOffset->GetInteger(); |
| 654 |
| 655 if (pFileLen->IsNumber()) |
| 656 dwFileLen = pFileLen->GetInteger(); |
| 657 |
632 if (!m_pFileAvail->IsDataAvail(m_dwLastXRefOffset, | 658 if (!m_pFileAvail->IsDataAvail(m_dwLastXRefOffset, |
633 (uint32_t)(dwFileLen - m_dwLastXRefOffset))) { | 659 (uint32_t)(dwFileLen - m_dwLastXRefOffset))) { |
634 if (m_docStatus == PDF_DATAAVAIL_FIRSTPAGE) { | 660 if (m_docStatus == PDF_DATAAVAIL_FIRSTPAGE) { |
635 uint32_t dwSize = (uint32_t)(dwFileLen - m_dwLastXRefOffset); | 661 uint32_t dwSize = (uint32_t)(dwFileLen - m_dwLastXRefOffset); |
636 FX_FILESIZE offset = m_dwLastXRefOffset; | 662 FX_FILESIZE offset = m_dwLastXRefOffset; |
637 if (dwSize < 512 && dwFileLen > 512) { | 663 if (dwSize < 512 && dwFileLen > 512) { |
638 dwSize = 512; | 664 dwSize = 512; |
639 offset = dwFileLen - 512; | 665 offset = dwFileLen - 512; |
640 } | 666 } |
641 pHints->AddSegment(offset, dwSize); | 667 pHints->AddSegment(offset, dwSize); |
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669 size += 512; | 695 size += 512; |
670 | 696 |
671 if (!m_pFileAvail->IsDataAvail(offset, size)) { | 697 if (!m_pFileAvail->IsDataAvail(offset, size)) { |
672 pHints->AddSegment(offset, size); | 698 pHints->AddSegment(offset, size); |
673 return false; | 699 return false; |
674 } | 700 } |
675 return true; | 701 return true; |
676 } | 702 } |
677 | 703 |
678 bool CPDF_DataAvail::CheckHintTables(DownloadHints* pHints) { | 704 bool CPDF_DataAvail::CheckHintTables(DownloadHints* pHints) { |
679 if (m_pLinearized->GetPageCount() <= 1) { | 705 CPDF_Dictionary* pDict = m_pLinearized->GetDict(); |
680 m_docStatus = PDF_DATAAVAIL_DONE; | 706 if (!pDict) { |
681 return true; | |
682 } | |
683 if (!m_pLinearized->HasHintTable()) { | |
684 m_docStatus = PDF_DATAAVAIL_ERROR; | 707 m_docStatus = PDF_DATAAVAIL_ERROR; |
685 return false; | 708 return false; |
686 } | 709 } |
687 | 710 |
688 FX_FILESIZE szHintStart = m_pLinearized->GetHintStart(); | 711 // The actual value is not required here, but validate its existence and type. |
689 FX_FILESIZE szHintLength = m_pLinearized->GetHintLength(); | 712 CPDF_Number* pFirstPage = ToNumber(pDict->GetDirectObjectFor("O")); |
| 713 if (!pFirstPage || !pFirstPage->IsInteger()) { |
| 714 m_docStatus = PDF_DATAAVAIL_ERROR; |
| 715 return false; |
| 716 } |
| 717 |
| 718 CPDF_Number* pPageCount = ToNumber(pDict->GetDirectObjectFor("N")); |
| 719 if (!pPageCount || !pPageCount->IsInteger()) { |
| 720 m_docStatus = PDF_DATAAVAIL_ERROR; |
| 721 return false; |
| 722 } |
| 723 |
| 724 int nPageCount = pPageCount->GetInteger(); |
| 725 if (nPageCount <= 1) { |
| 726 m_docStatus = PDF_DATAAVAIL_DONE; |
| 727 return true; |
| 728 } |
| 729 |
| 730 CPDF_Array* pHintStreamRange = pDict->GetArrayFor("H"); |
| 731 size_t nHintStreamSize = pHintStreamRange ? pHintStreamRange->GetCount() : 0; |
| 732 if (nHintStreamSize != 2 && nHintStreamSize != 4) { |
| 733 m_docStatus = PDF_DATAAVAIL_ERROR; |
| 734 return false; |
| 735 } |
| 736 |
| 737 for (const CPDF_Object* pArrayObject : *pHintStreamRange) { |
| 738 const CPDF_Number* pNumber = ToNumber(pArrayObject->GetDirect()); |
| 739 if (!pNumber || !pNumber->IsInteger()) { |
| 740 m_docStatus = PDF_DATAAVAIL_ERROR; |
| 741 return false; |
| 742 } |
| 743 } |
| 744 |
| 745 FX_FILESIZE szHintStart = pHintStreamRange->GetIntegerAt(0); |
| 746 FX_FILESIZE szHintLength = pHintStreamRange->GetIntegerAt(1); |
| 747 if (szHintStart < 0 || szHintLength <= 0) { |
| 748 m_docStatus = PDF_DATAAVAIL_ERROR; |
| 749 return false; |
| 750 } |
690 | 751 |
691 if (!IsDataAvail(szHintStart, szHintLength, pHints)) | 752 if (!IsDataAvail(szHintStart, szHintLength, pHints)) |
692 return false; | 753 return false; |
693 | 754 |
694 m_syntaxParser.InitParser(m_pFileRead, m_dwHeaderOffset); | 755 m_syntaxParser.InitParser(m_pFileRead, m_dwHeaderOffset); |
695 | 756 |
696 std::unique_ptr<CPDF_HintTables> pHintTables( | 757 std::unique_ptr<CPDF_HintTables> pHintTables( |
697 new CPDF_HintTables(this, m_pLinearized.get())); | 758 new CPDF_HintTables(this, pDict)); |
698 std::unique_ptr<CPDF_Object> pHintStream( | 759 std::unique_ptr<CPDF_Object> pHintStream( |
699 ParseIndirectObjectAt(szHintStart, 0)); | 760 ParseIndirectObjectAt(szHintStart, 0)); |
700 CPDF_Stream* pStream = ToStream(pHintStream.get()); | 761 CPDF_Stream* pStream = ToStream(pHintStream.get()); |
701 if (pStream && pHintTables->LoadHintStream(pStream)) | 762 if (pStream && pHintTables->LoadHintStream(pStream)) |
702 m_pHintTables = std::move(pHintTables); | 763 m_pHintTables = std::move(pHintTables); |
703 | 764 |
704 m_docStatus = PDF_DATAAVAIL_DONE; | 765 m_docStatus = PDF_DATAAVAIL_DONE; |
705 return true; | 766 return true; |
706 } | 767 } |
707 | 768 |
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751 | 812 |
752 uint8_t buffer[1024]; | 813 uint8_t buffer[1024]; |
753 m_pFileRead->ReadBlock(buffer, 0, kReqSize); | 814 m_pFileRead->ReadBlock(buffer, 0, kReqSize); |
754 if (IsLinearizedFile(buffer, kReqSize)) | 815 if (IsLinearizedFile(buffer, kReqSize)) |
755 return Linearized; | 816 return Linearized; |
756 | 817 |
757 return NotLinearized; | 818 return NotLinearized; |
758 } | 819 } |
759 | 820 |
760 bool CPDF_DataAvail::IsLinearized() { | 821 bool CPDF_DataAvail::IsLinearized() { |
761 return !!m_pLinearized; | 822 return m_bLinearized; |
762 } | 823 } |
763 | 824 |
764 bool CPDF_DataAvail::IsLinearizedFile(uint8_t* pData, uint32_t dwLen) { | 825 bool CPDF_DataAvail::IsLinearizedFile(uint8_t* pData, uint32_t dwLen) { |
765 if (m_pLinearized) | 826 if (m_pLinearized) |
766 return true; | 827 return m_bLinearized; |
767 | 828 |
768 ScopedFileStream file(FX_CreateMemoryStream(pData, (size_t)dwLen, false)); | 829 ScopedFileStream file(FX_CreateMemoryStream(pData, (size_t)dwLen, false)); |
769 | 830 |
770 int32_t offset = GetHeaderOffset(file.get()); | 831 int32_t offset = GetHeaderOffset(file.get()); |
771 if (offset == -1) { | 832 if (offset == -1) { |
772 m_docStatus = PDF_DATAAVAIL_ERROR; | 833 m_docStatus = PDF_DATAAVAIL_ERROR; |
773 return false; | 834 return false; |
774 } | 835 } |
775 | 836 |
776 m_dwHeaderOffset = offset; | 837 m_dwHeaderOffset = offset; |
777 m_syntaxParser.InitParser(file.get(), offset); | 838 m_syntaxParser.InitParser(file.get(), offset); |
778 m_syntaxParser.RestorePos(m_syntaxParser.m_HeaderOffset + 9); | 839 m_syntaxParser.RestorePos(m_syntaxParser.m_HeaderOffset + 9); |
779 | 840 |
780 bool bNumber; | 841 bool bNumber; |
781 CFX_ByteString wordObjNum = m_syntaxParser.GetNextWord(&bNumber); | 842 CFX_ByteString wordObjNum = m_syntaxParser.GetNextWord(&bNumber); |
782 if (!bNumber) | 843 if (!bNumber) |
783 return false; | 844 return false; |
784 | 845 |
785 uint32_t objnum = FXSYS_atoui(wordObjNum.c_str()); | 846 uint32_t objnum = FXSYS_atoui(wordObjNum.c_str()); |
786 m_pLinearized = CPDF_Linearized::CreateForObject(pdfium::WrapUnique( | 847 m_pLinearized = |
787 ParseIndirectObjectAt(m_syntaxParser.m_HeaderOffset + 9, objnum))); | 848 ParseIndirectObjectAt(m_syntaxParser.m_HeaderOffset + 9, objnum); |
788 if (!m_pLinearized || | 849 if (!m_pLinearized) |
789 m_pLinearized->GetFileSize() != m_pFileRead->GetSize()) { | |
790 m_pLinearized.reset(); | |
791 return false; | 850 return false; |
792 } | 851 |
| 852 CPDF_Dictionary* pDict = m_pLinearized->GetDict(); |
| 853 if (!pDict || !pDict->GetObjectFor("Linearized")) |
| 854 return false; |
| 855 |
| 856 CPDF_Object* pLen = pDict->GetObjectFor("L"); |
| 857 if (!pLen) |
| 858 return false; |
| 859 |
| 860 if ((FX_FILESIZE)pLen->GetInteger() != m_pFileRead->GetSize()) |
| 861 return false; |
| 862 |
| 863 m_bLinearized = true; |
| 864 |
| 865 if (CPDF_Number* pNo = ToNumber(pDict->GetObjectFor("P"))) |
| 866 m_dwFirstPageNo = pNo->GetInteger(); |
| 867 |
793 return true; | 868 return true; |
794 } | 869 } |
795 | 870 |
796 bool CPDF_DataAvail::CheckEnd(DownloadHints* pHints) { | 871 bool CPDF_DataAvail::CheckEnd(DownloadHints* pHints) { |
797 uint32_t req_pos = (uint32_t)(m_dwFileLen > 1024 ? m_dwFileLen - 1024 : 0); | 872 uint32_t req_pos = (uint32_t)(m_dwFileLen > 1024 ? m_dwFileLen - 1024 : 0); |
798 uint32_t dwSize = (uint32_t)(m_dwFileLen - req_pos); | 873 uint32_t dwSize = (uint32_t)(m_dwFileLen - req_pos); |
799 | 874 |
800 if (m_pFileAvail->IsDataAvail(req_pos, dwSize)) { | 875 if (m_pFileAvail->IsDataAvail(req_pos, dwSize)) { |
801 uint8_t buffer[1024]; | 876 uint8_t buffer[1024]; |
802 m_pFileRead->ReadBlock(buffer, req_pos, dwSize); | 877 m_pFileRead->ReadBlock(buffer, req_pos, dwSize); |
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1518 m_bPageLoadedOK = false; | 1593 m_bPageLoadedOK = false; |
1519 m_bAnnotsLoad = false; | 1594 m_bAnnotsLoad = false; |
1520 m_bNeedDownLoadResource = false; | 1595 m_bNeedDownLoadResource = false; |
1521 m_objs_array.clear(); | 1596 m_objs_array.clear(); |
1522 m_ObjectSet.clear(); | 1597 m_ObjectSet.clear(); |
1523 } | 1598 } |
1524 | 1599 |
1525 if (pdfium::ContainsKey(m_pagesLoadState, dwPage)) | 1600 if (pdfium::ContainsKey(m_pagesLoadState, dwPage)) |
1526 return DataAvailable; | 1601 return DataAvailable; |
1527 | 1602 |
1528 if (m_pLinearized) { | 1603 if (m_bLinearized) { |
1529 if (dwPage == m_pLinearized->GetFirstPageNo()) { | 1604 if (dwPage == m_dwFirstPageNo) { |
1530 DocAvailStatus nRet = CheckLinearizedFirstPage(dwPage, pHints); | 1605 DocAvailStatus nRet = CheckLinearizedFirstPage(dwPage, pHints); |
1531 if (nRet == DataAvailable) | 1606 if (nRet == DataAvailable) |
1532 m_pagesLoadState.insert(dwPage); | 1607 m_pagesLoadState.insert(dwPage); |
1533 return nRet; | 1608 return nRet; |
1534 } | 1609 } |
1535 | 1610 |
1536 DocAvailStatus nResult = CheckLinearizedData(pHints); | 1611 DocAvailStatus nResult = CheckLinearizedData(pHints); |
1537 if (nResult != DataAvailable) | 1612 if (nResult != DataAvailable) |
1538 return nResult; | 1613 return nResult; |
1539 | 1614 |
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1649 | 1724 |
1650 void CPDF_DataAvail::GetLinearizedMainXRefInfo(FX_FILESIZE* pPos, | 1725 void CPDF_DataAvail::GetLinearizedMainXRefInfo(FX_FILESIZE* pPos, |
1651 uint32_t* pSize) { | 1726 uint32_t* pSize) { |
1652 if (pPos) | 1727 if (pPos) |
1653 *pPos = m_dwLastXRefOffset; | 1728 *pPos = m_dwLastXRefOffset; |
1654 if (pSize) | 1729 if (pSize) |
1655 *pSize = (uint32_t)(m_dwFileLen - m_dwLastXRefOffset); | 1730 *pSize = (uint32_t)(m_dwFileLen - m_dwLastXRefOffset); |
1656 } | 1731 } |
1657 | 1732 |
1658 int CPDF_DataAvail::GetPageCount() const { | 1733 int CPDF_DataAvail::GetPageCount() const { |
1659 if (m_pLinearized) | 1734 if (m_pLinearized) { |
1660 return m_pLinearized->GetPageCount(); | 1735 CPDF_Dictionary* pDict = m_pLinearized->GetDict(); |
| 1736 CPDF_Object* pObj = pDict ? pDict->GetDirectObjectFor("N") : nullptr; |
| 1737 return pObj ? pObj->GetInteger() : 0; |
| 1738 } |
1661 return m_pDocument ? m_pDocument->GetPageCount() : 0; | 1739 return m_pDocument ? m_pDocument->GetPageCount() : 0; |
1662 } | 1740 } |
1663 | 1741 |
1664 CPDF_Dictionary* CPDF_DataAvail::GetPage(int index) { | 1742 CPDF_Dictionary* CPDF_DataAvail::GetPage(int index) { |
1665 if (!m_pDocument || index < 0 || index >= GetPageCount()) | 1743 if (!m_pDocument || index < 0 || index >= GetPageCount()) |
1666 return nullptr; | 1744 return nullptr; |
1667 CPDF_Dictionary* page = m_pDocument->GetPage(index); | 1745 CPDF_Dictionary* page = m_pDocument->GetPage(index); |
1668 if (page) | 1746 if (page) |
1669 return page; | 1747 return page; |
1670 if (!m_pLinearized || !m_pHintTables) | 1748 if (!m_pLinearized || !m_pHintTables) |
1671 return nullptr; | 1749 return nullptr; |
1672 | 1750 |
1673 if (index == static_cast<int>(m_pLinearized->GetFirstPageNo())) | 1751 CPDF_Dictionary* pDict = m_pLinearized->GetDict(); |
| 1752 CPDF_Object* pObj = pDict ? pDict->GetDirectObjectFor("P") : nullptr; |
| 1753 int firstPageNum = pObj ? pObj->GetInteger() : 0; |
| 1754 if (index == firstPageNum) |
1674 return nullptr; | 1755 return nullptr; |
1675 FX_FILESIZE szPageStartPos = 0; | 1756 FX_FILESIZE szPageStartPos = 0; |
1676 FX_FILESIZE szPageLength = 0; | 1757 FX_FILESIZE szPageLength = 0; |
1677 uint32_t dwObjNum = 0; | 1758 uint32_t dwObjNum = 0; |
1678 const bool bPagePosGot = m_pHintTables->GetPagePos(index, &szPageStartPos, | 1759 const bool bPagePosGot = m_pHintTables->GetPagePos(index, &szPageStartPos, |
1679 &szPageLength, &dwObjNum); | 1760 &szPageLength, &dwObjNum); |
1680 if (!bPagePosGot || !dwObjNum) | 1761 if (!bPagePosGot || !dwObjNum) |
1681 return nullptr; | 1762 return nullptr; |
1682 // We should say to the document, which object is the page. | 1763 // We should say to the document, which object is the page. |
1683 m_pDocument->SetPageObjNum(index, dwObjNum); | 1764 m_pDocument->SetPageObjNum(index, dwObjNum); |
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1726 return FormAvailable; | 1807 return FormAvailable; |
1727 } | 1808 } |
1728 | 1809 |
1729 CPDF_DataAvail::PageNode::PageNode() : m_type(PDF_PAGENODE_UNKNOWN) {} | 1810 CPDF_DataAvail::PageNode::PageNode() : m_type(PDF_PAGENODE_UNKNOWN) {} |
1730 | 1811 |
1731 CPDF_DataAvail::PageNode::~PageNode() { | 1812 CPDF_DataAvail::PageNode::~PageNode() { |
1732 for (int32_t i = 0; i < m_childNode.GetSize(); ++i) | 1813 for (int32_t i = 0; i < m_childNode.GetSize(); ++i) |
1733 delete m_childNode[i]; | 1814 delete m_childNode[i]; |
1734 m_childNode.RemoveAll(); | 1815 m_childNode.RemoveAll(); |
1735 } | 1816 } |
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