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// 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 FX_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_FileRead* pFileRead,
FX_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();
FX_BOOL IsLinearized();
void GetLinearizedMainXRefInfo(FX_FILESIZE* pPos, uint32_t* pSize);
IFX_FileRead* 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);
FX_BOOL AreObjectsAvailable(std::vector<CPDF_Object*>& obj_array,
FX_BOOL bParsePage,
DownloadHints* pHints,
std::vector<CPDF_Object*>& ret_array);
FX_BOOL CheckDocStatus(DownloadHints* pHints);
FX_BOOL CheckHeader(DownloadHints* pHints);
FX_BOOL CheckFirstPage(DownloadHints* pHints);
FX_BOOL CheckHintTables(DownloadHints* pHints);
FX_BOOL CheckEnd(DownloadHints* pHints);
FX_BOOL CheckCrossRef(DownloadHints* pHints);
FX_BOOL CheckCrossRefItem(DownloadHints* pHints);
FX_BOOL CheckTrailer(DownloadHints* pHints);
FX_BOOL CheckRoot(DownloadHints* pHints);
FX_BOOL CheckInfo(DownloadHints* pHints);
FX_BOOL CheckPages(DownloadHints* pHints);
FX_BOOL CheckPage(DownloadHints* pHints);
FX_BOOL CheckResources(DownloadHints* pHints);
FX_BOOL CheckAnnots(DownloadHints* pHints);
FX_BOOL CheckAcroForm(DownloadHints* pHints);
FX_BOOL CheckAcroFormSubObject(DownloadHints* pHints);
FX_BOOL CheckTrailerAppend(DownloadHints* pHints);
FX_BOOL CheckPageStatus(DownloadHints* pHints);
FX_BOOL CheckAllCrossRefStream(DownloadHints* pHints);
int32_t CheckCrossRefStream(DownloadHints* pHints, FX_FILESIZE& xref_offset);
FX_BOOL IsLinearizedFile(uint8_t* pData, uint32_t dwLen);
void SetStartOffset(FX_FILESIZE dwOffset);
FX_BOOL GetNextToken(CFX_ByteString& token);
FX_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,
FX_BOOL* pExistInFile);
FX_BOOL GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages);
FX_BOOL PreparePageItem();
FX_BOOL LoadPages(DownloadHints* pHints);
FX_BOOL LoadAllXref(DownloadHints* pHints);
FX_BOOL LoadAllFile(DownloadHints* pHints);
DocAvailStatus CheckLinearizedData(DownloadHints* pHints);
FX_BOOL CheckPageAnnots(uint32_t dwPage, DownloadHints* pHints);
DocAvailStatus CheckLinearizedFirstPage(uint32_t dwPage,
DownloadHints* pHints);
FX_BOOL HaveResourceAncestor(CPDF_Dictionary* pDict);
FX_BOOL CheckPage(uint32_t dwPage, DownloadHints* pHints);
FX_BOOL LoadDocPages(DownloadHints* pHints);
FX_BOOL LoadDocPage(uint32_t dwPage, DownloadHints* pHints);
FX_BOOL CheckPageNode(PageNode& pageNodes,
int32_t iPage,
int32_t& iCount,
DownloadHints* pHints,
int level);
FX_BOOL CheckUnkownPageNode(uint32_t dwPageNo,
PageNode* pPageNode,
DownloadHints* pHints);
FX_BOOL CheckArrayPageNode(uint32_t dwPageNo,
PageNode* pPageNode,
DownloadHints* pHints);
FX_BOOL CheckPageCount(DownloadHints* pHints);
bool IsFirstCheck(uint32_t dwPage);
void ResetFirstCheck(uint32_t dwPage);
FX_BOOL IsDataAvail(FX_FILESIZE offset, uint32_t size, DownloadHints* pHints);
FileAvail* const m_pFileAvail;
IFX_FileRead* 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;
FX_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;
FX_BOOL m_bLinearized;
uint32_t m_dwFirstPageNo;
FX_BOOL m_bLinearedDataOK;
FX_BOOL m_bMainXRefLoadTried;
FX_BOOL m_bMainXRefLoadedOK;
FX_BOOL m_bPagesTreeLoad;
FX_BOOL m_bPagesLoad;
CPDF_Parser* m_pCurrentParser;
FX_FILESIZE m_dwCurrentXRefSteam;
FX_BOOL m_bAnnotsLoad;
FX_BOOL m_bHaveAcroForm;
uint32_t m_dwAcroFormObjNum;
FX_BOOL m_bAcroFormLoad;
CPDF_Object* m_pAcroForm;
std::vector<CPDF_Object*> m_arrayAcroforms;
CPDF_Dictionary* m_pPageDict;
CPDF_Object* m_pPageResource;
FX_BOOL m_bNeedDownLoadResource;
FX_BOOL m_bPageLoadedOK;
FX_BOOL m_bLinearizedFormParamLoad;
std::vector<CPDF_Object*> m_PagesArray;
uint32_t m_dwEncryptObjNum;
FX_FILESIZE m_dwPrevXRefOffset;
FX_BOOL m_bTotalLoadPageTree;
FX_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;
FX_BOOL m_bSupportHintTable;
};
#endif // CORE_FPDFAPI_PARSER_CPDF_DATA_AVAIL_H_
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