| // 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 <map> |
| #include <memory> |
| #include <set> |
| #include <utility> |
| #include <vector> |
| |
| #include "core/fpdfapi/parser/cpdf_document.h" |
| #include "core/fpdfapi/parser/cpdf_parser.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| |
| class CPDF_CrossRefAvail; |
| class CPDF_Dictionary; |
| class CPDF_HintTables; |
| class CPDF_IndirectObjectHolder; |
| class CPDF_LinearizedHeader; |
| class CPDF_PageObjectAvail; |
| class CPDF_ReadValidator; |
| class CPDF_SyntaxParser; |
| |
| class CPDF_DataAvail final : public Observable::ObserverIface { |
| 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 { |
| kDataError = -1, // PDF_DATA_ERROR |
| kDataNotAvailable = 0, // PDF_DATA_NOTAVAIL |
| kDataAvailable = 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 { |
| kLinearizationUnknown = -1, // PDF_LINEARIZATION_UNKNOWN |
| kNotLinearized = 0, // PDF_NOT_LINEARIZED |
| kLinearized = 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 { |
| kFormError = -1, // PDF_FORM_ERROR |
| kFormNotAvailable = 0, // PDF_FORM_NOTAVAIL |
| kFormAvailable = 1, // PDF_FORM_AVAIL |
| kFormNotExist = 2, // PDF_FORM_NOTEXIST |
| }; |
| |
| class FileAvail { |
| public: |
| virtual ~FileAvail(); |
| virtual bool IsDataAvail(FX_FILESIZE offset, size_t size) = 0; |
| }; |
| |
| class DownloadHints { |
| public: |
| virtual ~DownloadHints(); |
| virtual void AddSegment(FX_FILESIZE offset, size_t size) = 0; |
| }; |
| |
| CPDF_DataAvail(FileAvail* pFileAvail, |
| const RetainPtr<IFX_SeekableReadStream>& pFileRead); |
| ~CPDF_DataAvail() override; |
| |
| // Observable::ObserverIface: |
| void OnObservableDestroyed() override; |
| |
| DocAvailStatus IsDocAvail(DownloadHints* pHints); |
| DocAvailStatus IsPageAvail(uint32_t dwPage, DownloadHints* pHints); |
| DocFormStatus IsFormAvail(DownloadHints* pHints); |
| DocLinearizationStatus IsLinearizedPDF(); |
| int GetPageCount() const; |
| CPDF_Dictionary* GetPageDictionary(int index) const; |
| RetainPtr<CPDF_ReadValidator> GetValidator() const; |
| |
| std::pair<CPDF_Parser::Error, std::unique_ptr<CPDF_Document>> ParseDocument( |
| std::unique_ptr<CPDF_Document::RenderDataIface> pRenderData, |
| std::unique_ptr<CPDF_Document::PageDataIface> pPageData, |
| const ByteString& password); |
| |
| const CPDF_HintTables* GetHintTables() const { return m_pHintTables.get(); } |
| |
| private: |
| enum class InternalStatus : uint8_t { |
| kHeader = 0, |
| kFirstPage, |
| kHintTable, |
| kLoadAllCrossRef, |
| kRoot, |
| kInfo, |
| kPageTree, |
| kPage, |
| kPageLaterLoad, |
| kResources, |
| kDone, |
| kError, |
| kLoadAllFile, |
| }; |
| |
| class PageNode { |
| public: |
| enum class Type { kUnknown = 0, kPage, kPages, kArray }; |
| |
| PageNode(); |
| ~PageNode(); |
| |
| Type m_type = Type::kUnknown; |
| uint32_t m_dwPageNo = 0; |
| std::vector<std::unique_ptr<PageNode>> m_ChildNodes; |
| }; |
| |
| static constexpr int kMaxPageRecursionDepth = 1024; |
| |
| bool CheckDocStatus(); |
| bool CheckHeader(); |
| bool CheckFirstPage(); |
| bool CheckHintTables(); |
| bool CheckRoot(); |
| bool CheckInfo(); |
| bool CheckPages(); |
| bool CheckPage(); |
| DocAvailStatus CheckResources(CPDF_Dictionary* page); |
| DocFormStatus CheckAcroForm(); |
| bool CheckPageStatus(); |
| |
| DocAvailStatus CheckHeaderAndLinearized(); |
| RetainPtr<CPDF_Object> ParseIndirectObjectAt( |
| FX_FILESIZE pos, |
| uint32_t objnum, |
| CPDF_IndirectObjectHolder* pObjList) const; |
| RetainPtr<CPDF_Object> GetObject(uint32_t objnum, bool* pExistInFile); |
| bool GetPageKids(CPDF_Object* pPages); |
| bool PreparePageItem(); |
| bool LoadPages(); |
| bool CheckAndLoadAllXref(); |
| bool LoadAllFile(); |
| DocAvailStatus CheckLinearizedData(); |
| |
| bool CheckPage(uint32_t dwPage); |
| bool LoadDocPages(); |
| bool LoadDocPage(uint32_t dwPage); |
| bool CheckPageNode(const PageNode& pageNode, |
| int32_t iPage, |
| int32_t& iCount, |
| int level); |
| bool CheckUnknownPageNode(uint32_t dwPageNo, PageNode* pPageNode); |
| bool CheckArrayPageNode(uint32_t dwPageNo, PageNode* pPageNode); |
| bool CheckPageCount(); |
| bool IsFirstCheck(uint32_t dwPage); |
| void ResetFirstCheck(uint32_t dwPage); |
| bool ValidatePage(uint32_t dwPage) const; |
| CPDF_SyntaxParser* GetSyntaxParser() const; |
| |
| RetainPtr<CPDF_ReadValidator> m_pFileRead; |
| CPDF_Parser m_parser; |
| RetainPtr<CPDF_Dictionary> m_pRoot; |
| std::unique_ptr<CPDF_LinearizedHeader> m_pLinearized; |
| bool m_bDocAvail = false; |
| InternalStatus m_internalStatus = InternalStatus::kHeader; |
| std::unique_ptr<CPDF_CrossRefAvail> m_pCrossRefAvail; |
| const FX_FILESIZE m_dwFileLen; |
| UnownedPtr<CPDF_Document> m_pDocument; |
| std::vector<uint32_t> m_PageObjList; |
| std::set<uint32_t> m_SeenPageObjList; |
| uint32_t m_PagesObjNum = 0; |
| bool m_bLinearedDataOK = false; |
| bool m_bMainXRefLoadTried = false; |
| bool m_bMainXRefLoadedOK = false; |
| bool m_bPagesTreeLoad = false; |
| bool m_bPagesLoad = false; |
| std::unique_ptr<CPDF_PageObjectAvail> m_pFormAvail; |
| std::vector<RetainPtr<CPDF_Object>> m_PagesArray; |
| bool m_bTotalLoadPageTree = false; |
| bool m_bCurPageDictLoadOK = false; |
| PageNode m_PageNode; |
| std::set<uint32_t> m_pageMapCheckState; |
| std::set<uint32_t> m_pagesLoadState; |
| std::unique_ptr<CPDF_HintTables> m_pHintTables; |
| std::map<uint32_t, std::unique_ptr<CPDF_PageObjectAvail>> m_PagesObjAvail; |
| std::map<const CPDF_Object*, std::unique_ptr<CPDF_PageObjectAvail>> |
| m_PagesResourcesAvail; |
| bool m_bHeaderAvail = false; |
| }; |
| |
| #endif // CORE_FPDFAPI_PARSER_CPDF_DATA_AVAIL_H_ |