| // 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_DATA_AVAIL_H_ |
| #define CORE_FPDFAPI_PARSER_CPDF_DATA_AVAIL_H_ |
| |
| #include <vector> |
| |
| #include "core/fpdfapi/parser/cpdf_parser.h" |
| #include "core/fpdfapi/parser/cpdf_syntax_parser.h" |
| #include "core/fxcrt/fx_basic.h" |
| |
| class CPDF_Dictionary; |
| class CPDF_HintTables; |
| class CPDF_IndirectObjectHolder; |
| class CPDF_Parser; |
| |
| enum PDF_DATAAVAIL_STATUS { |
| PDF_DATAAVAIL_HEADER = 0, |
| PDF_DATAAVAIL_FIRSTPAGE, |
| PDF_DATAAVAIL_FIRSTPAGE_PREPARE, |
| PDF_DATAAVAIL_HINTTABLE, |
| PDF_DATAAVAIL_END, |
| PDF_DATAAVAIL_CROSSREF, |
| PDF_DATAAVAIL_CROSSREF_ITEM, |
| PDF_DATAAVAIL_CROSSREF_STREAM, |
| PDF_DATAAVAIL_TRAILER, |
| PDF_DATAAVAIL_LOADALLCROSSREF, |
| PDF_DATAAVAIL_ROOT, |
| PDF_DATAAVAIL_INFO, |
| PDF_DATAAVAIL_ACROFORM, |
| PDF_DATAAVAIL_ACROFORM_SUBOBJECT, |
| PDF_DATAAVAIL_PAGETREE, |
| PDF_DATAAVAIL_PAGE, |
| PDF_DATAAVAIL_PAGE_LATERLOAD, |
| PDF_DATAAVAIL_RESOURCES, |
| PDF_DATAAVAIL_DONE, |
| PDF_DATAAVAIL_ERROR, |
| PDF_DATAAVAIL_LOADALLFILE, |
| PDF_DATAAVAIL_TRAILER_APPEND |
| }; |
| |
| enum PDF_PAGENODE_TYPE { |
| PDF_PAGENODE_UNKNOWN = 0, |
| PDF_PAGENODE_PAGE, |
| PDF_PAGENODE_PAGES, |
| PDF_PAGENODE_ARRAY, |
| }; |
| |
| class CPDF_DataAvail final { |
| public: |
| // Must match PDF_DATA_* definitions in public/fpdf_dataavail.h, but cannot |
| // #include that header. fpdfsdk/fpdf_dataavail.cpp has static_asserts |
| // to make sure the two sets of values match. |
| enum DocAvailStatus { |
| DataError = -1, // PDF_DATA_ERROR |
| DataNotAvailable = 0, // PDF_DATA_NOTAVAIL |
| DataAvailable = 1, // PDF_DATA_AVAIL |
| }; |
| |
| // Must match PDF_*LINEAR* definitions in public/fpdf_dataavail.h, but cannot |
| // #include that header. fpdfsdk/fpdf_dataavail.cpp has static_asserts |
| // to make sure the two sets of values match. |
| enum DocLinearizationStatus { |
| LinearizationUnknown = -1, // PDF_LINEARIZATION_UNKNOWN |
| NotLinearized = 0, // PDF_NOT_LINEARIZED |
| Linearized = 1, // PDF_LINEARIZED |
| }; |
| |
| // Must match PDF_FORM_* definitions in public/fpdf_dataavail.h, but cannot |
| // #include that header. fpdfsdk/fpdf_dataavail.cpp has static_asserts |
| // to make sure the two sets of values match. |
| enum DocFormStatus { |
| FormError = -1, // PDF_FORM_ERROR |
| FormNotAvailable = 0, // PDF_FORM_NOTAVAIL |
| FormAvailable = 1, // PDF_FORM_AVAIL |
| FormNotExist = 2, // PDF_FORM_NOTEXIST |
| }; |
| |
| class FileAvail { |
| public: |
| virtual ~FileAvail(); |
| virtual bool IsDataAvail(FX_FILESIZE offset, uint32_t size) = 0; |
| }; |
| |
| class DownloadHints { |
| public: |
| virtual ~DownloadHints(); |
| virtual void AddSegment(FX_FILESIZE offset, uint32_t size) = 0; |
| }; |
| |
| CPDF_DataAvail(FileAvail* pFileAvail, |
| IFX_SeekableReadStream* pFileRead, |
| bool bSupportHintTable); |
| ~CPDF_DataAvail(); |
| |
| DocAvailStatus IsDocAvail(DownloadHints* pHints); |
| void SetDocument(CPDF_Document* pDoc); |
| DocAvailStatus IsPageAvail(uint32_t dwPage, DownloadHints* pHints); |
| DocFormStatus IsFormAvail(DownloadHints* pHints); |
| DocLinearizationStatus IsLinearizedPDF(); |
| bool IsLinearized(); |
| void GetLinearizedMainXRefInfo(FX_FILESIZE* pPos, uint32_t* pSize); |
| IFX_SeekableReadStream* GetFileRead() const { return m_pFileRead; } |
| int GetPageCount() const; |
| CPDF_Dictionary* GetPage(int index); |
| |
| friend class CPDF_HintTables; |
| |
| protected: |
| class PageNode { |
| public: |
| PageNode(); |
| ~PageNode(); |
| |
| PDF_PAGENODE_TYPE m_type; |
| uint32_t m_dwPageNo; |
| CFX_ArrayTemplate<PageNode*> m_childNode; |
| }; |
| |
| static const int kMaxDataAvailRecursionDepth = 64; |
| static int s_CurrentDataAvailRecursionDepth; |
| static const int kMaxPageRecursionDepth = 1024; |
| |
| uint32_t GetObjectSize(uint32_t objnum, FX_FILESIZE& offset); |
| bool AreObjectsAvailable(std::vector<CPDF_Object*>& obj_array, |
| bool bParsePage, |
| DownloadHints* pHints, |
| std::vector<CPDF_Object*>& ret_array); |
| bool CheckDocStatus(DownloadHints* pHints); |
| bool CheckHeader(DownloadHints* pHints); |
| bool CheckFirstPage(DownloadHints* pHints); |
| bool CheckHintTables(DownloadHints* pHints); |
| bool CheckEnd(DownloadHints* pHints); |
| bool CheckCrossRef(DownloadHints* pHints); |
| bool CheckCrossRefItem(DownloadHints* pHints); |
| bool CheckTrailer(DownloadHints* pHints); |
| bool CheckRoot(DownloadHints* pHints); |
| bool CheckInfo(DownloadHints* pHints); |
| bool CheckPages(DownloadHints* pHints); |
| bool CheckPage(DownloadHints* pHints); |
| bool CheckResources(DownloadHints* pHints); |
| bool CheckAnnots(DownloadHints* pHints); |
| bool CheckAcroForm(DownloadHints* pHints); |
| bool CheckAcroFormSubObject(DownloadHints* pHints); |
| bool CheckTrailerAppend(DownloadHints* pHints); |
| bool CheckPageStatus(DownloadHints* pHints); |
| bool CheckAllCrossRefStream(DownloadHints* pHints); |
| |
| int32_t CheckCrossRefStream(DownloadHints* pHints, FX_FILESIZE& xref_offset); |
| bool IsLinearizedFile(uint8_t* pData, uint32_t dwLen); |
| void SetStartOffset(FX_FILESIZE dwOffset); |
| bool GetNextToken(CFX_ByteString& token); |
| bool GetNextChar(uint8_t& ch); |
| CPDF_Object* ParseIndirectObjectAt( |
| FX_FILESIZE pos, |
| uint32_t objnum, |
| CPDF_IndirectObjectHolder* pObjList = nullptr); |
| CPDF_Object* GetObject(uint32_t objnum, |
| DownloadHints* pHints, |
| bool* pExistInFile); |
| bool GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages); |
| bool PreparePageItem(); |
| bool LoadPages(DownloadHints* pHints); |
| bool LoadAllXref(DownloadHints* pHints); |
| bool LoadAllFile(DownloadHints* pHints); |
| DocAvailStatus CheckLinearizedData(DownloadHints* pHints); |
| bool CheckPageAnnots(uint32_t dwPage, DownloadHints* pHints); |
| |
| DocAvailStatus CheckLinearizedFirstPage(uint32_t dwPage, |
| DownloadHints* pHints); |
| bool HaveResourceAncestor(CPDF_Dictionary* pDict); |
| bool CheckPage(uint32_t dwPage, DownloadHints* pHints); |
| bool LoadDocPages(DownloadHints* pHints); |
| bool LoadDocPage(uint32_t dwPage, DownloadHints* pHints); |
| bool CheckPageNode(PageNode& pageNodes, |
| int32_t iPage, |
| int32_t& iCount, |
| DownloadHints* pHints, |
| int level); |
| bool CheckUnkownPageNode(uint32_t dwPageNo, |
| PageNode* pPageNode, |
| DownloadHints* pHints); |
| bool CheckArrayPageNode(uint32_t dwPageNo, |
| PageNode* pPageNode, |
| DownloadHints* pHints); |
| bool CheckPageCount(DownloadHints* pHints); |
| bool IsFirstCheck(uint32_t dwPage); |
| void ResetFirstCheck(uint32_t dwPage); |
| bool IsDataAvail(FX_FILESIZE offset, uint32_t size, DownloadHints* pHints); |
| |
| FileAvail* const m_pFileAvail; |
| IFX_SeekableReadStream* const m_pFileRead; |
| CPDF_Parser m_parser; |
| CPDF_SyntaxParser m_syntaxParser; |
| CPDF_Object* m_pRoot; |
| uint32_t m_dwRootObjNum; |
| uint32_t m_dwInfoObjNum; |
| CPDF_Object* m_pLinearized; |
| CPDF_Object* m_pTrailer; |
| bool m_bDocAvail; |
| FX_FILESIZE m_dwHeaderOffset; |
| FX_FILESIZE m_dwLastXRefOffset; |
| FX_FILESIZE m_dwXRefOffset; |
| FX_FILESIZE m_dwTrailerOffset; |
| FX_FILESIZE m_dwCurrentOffset; |
| PDF_DATAAVAIL_STATUS m_docStatus; |
| FX_FILESIZE m_dwFileLen; |
| CPDF_Document* m_pDocument; |
| std::set<uint32_t> m_ObjectSet; |
| std::vector<CPDF_Object*> m_objs_array; |
| FX_FILESIZE m_Pos; |
| FX_FILESIZE m_bufferOffset; |
| uint32_t m_bufferSize; |
| CFX_ByteString m_WordBuf; |
| uint8_t m_bufferData[512]; |
| CFX_ArrayTemplate<uint32_t> m_XRefStreamList; |
| CFX_ArrayTemplate<uint32_t> m_PageObjList; |
| uint32_t m_PagesObjNum; |
| bool m_bLinearized; |
| uint32_t m_dwFirstPageNo; |
| bool m_bLinearedDataOK; |
| bool m_bMainXRefLoadTried; |
| bool m_bMainXRefLoadedOK; |
| bool m_bPagesTreeLoad; |
| bool m_bPagesLoad; |
| CPDF_Parser* m_pCurrentParser; |
| FX_FILESIZE m_dwCurrentXRefSteam; |
| bool m_bAnnotsLoad; |
| bool m_bHaveAcroForm; |
| uint32_t m_dwAcroFormObjNum; |
| bool m_bAcroFormLoad; |
| CPDF_Object* m_pAcroForm; |
| std::vector<CPDF_Object*> m_arrayAcroforms; |
| CPDF_Dictionary* m_pPageDict; |
| CPDF_Object* m_pPageResource; |
| bool m_bNeedDownLoadResource; |
| bool m_bPageLoadedOK; |
| bool m_bLinearizedFormParamLoad; |
| std::vector<CPDF_Object*> m_PagesArray; |
| uint32_t m_dwEncryptObjNum; |
| FX_FILESIZE m_dwPrevXRefOffset; |
| bool m_bTotalLoadPageTree; |
| bool m_bCurPageDictLoadOK; |
| PageNode m_pageNodes; |
| std::set<uint32_t> m_pageMapCheckState; |
| std::set<uint32_t> m_pagesLoadState; |
| std::unique_ptr<CPDF_HintTables> m_pHintTables; |
| bool m_bSupportHintTable; |
| }; |
| |
| #endif // CORE_FPDFAPI_PARSER_CPDF_DATA_AVAIL_H_ |
