Split apart the remainder of fpdf_render_render.cpp into per-class files.

core/src/fpdfapi/fpdf_parser/cpdf_data_avail.h

Index: core/src/fpdfapi/fpdf_parser/cpdf_data_avail.h
diff --git a/core/src/fpdfapi/fpdf_parser/cpdf_data_avail.h b/core/src/fpdfapi/fpdf_parser/cpdf_data_avail.h
new file mode 100644
index 0000000000000000000000000000000000000000..3fc26c368a6e548cc07bb46fca12992c26c4f7a9
--- /dev/null
+++ b/core/src/fpdfapi/fpdf_parser/cpdf_data_avail.h
@@ -0,0 +1,217 @@
+// 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_SRC_FPDFAPI_FPDF_PARSER_CPDF_DATA_AVAIL_H_
+#define CORE_SRC_FPDFAPI_FPDF_PARSER_CPDF_DATA_AVAIL_H_
+
+#include "core/include/fpdfapi/cpdf_parser.h"
+#include "core/include/fpdfapi/ipdf_data_avail.h"
+#include "core/include/fxcrt/fx_basic.h"
+#include "core/src/fpdfapi/fpdf_parser/cpdf_hint_tables.h"
+#include "core/src/fpdfapi/fpdf_parser/cpdf_syntax_parser.h"
+
+class CPDF_Dictionary;
+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 IPDF_DataAvail {
+ public:
+  CPDF_DataAvail(FileAvail* pFileAvail,
+                 IFX_FileRead* pFileRead,
+                 FX_BOOL bSupportHintTable);
+  ~CPDF_DataAvail() override;
+
+  // IPDF_DataAvail:
+  DocAvailStatus IsDocAvail(DownloadHints* pHints) override;
+  void SetDocument(CPDF_Document* pDoc) override;
+  DocAvailStatus IsPageAvail(int iPage, DownloadHints* pHints) override;
+  DocFormStatus IsFormAvail(DownloadHints* pHints) override;
+  DocLinearizationStatus IsLinearizedPDF() override;
+  FX_BOOL IsLinearized() override { return m_bLinearized; }
+  void GetLinearizedMainXRefInfo(FX_FILESIZE* pPos, FX_DWORD* pSize) override;
+
+  int GetPageCount() const;
+  CPDF_Dictionary* GetPage(int index);
+
+  friend class CPDF_HintTables;
+
+ protected:
+  class PageNode {
+   public:
+    PageNode();
+    ~PageNode();
+
+    PDF_PAGENODE_TYPE m_type;
+    FX_DWORD m_dwPageNo;
+    CFX_ArrayTemplate<PageNode*> m_childNode;
+  };
+
+  static const int kMaxDataAvailRecursionDepth = 64;
+  static int s_CurrentDataAvailRecursionDepth;
+  static const int kMaxPageRecursionDepth = 1024;
+
+  FX_DWORD GetObjectSize(FX_DWORD objnum, FX_FILESIZE& offset);
+  FX_BOOL IsObjectsAvail(CFX_ArrayTemplate<CPDF_Object*>& obj_array,
+                         FX_BOOL bParsePage,
+                         IPDF_DataAvail::DownloadHints* pHints,
+                         CFX_ArrayTemplate<CPDF_Object*>& ret_array);
+  FX_BOOL CheckDocStatus(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckHeader(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckFirstPage(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckHintTables(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckEnd(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckCrossRef(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckCrossRefItem(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckTrailer(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckRoot(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckInfo(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckPages(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckPage(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckResources(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckAnnots(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckAcroForm(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckAcroFormSubObject(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckTrailerAppend(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckPageStatus(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckAllCrossRefStream(IPDF_DataAvail::DownloadHints* pHints);
+
+  int32_t CheckCrossRefStream(IPDF_DataAvail::DownloadHints* pHints,
+                              FX_FILESIZE& xref_offset);
+  FX_BOOL IsLinearizedFile(uint8_t* pData, FX_DWORD dwLen);
+  void SetStartOffset(FX_FILESIZE dwOffset);
+  FX_BOOL GetNextToken(CFX_ByteString& token);
+  FX_BOOL GetNextChar(uint8_t& ch);
+  CPDF_Object* ParseIndirectObjectAt(
+      FX_FILESIZE pos,
+      FX_DWORD objnum,
+      CPDF_IndirectObjectHolder* pObjList = nullptr);
+  CPDF_Object* GetObject(FX_DWORD objnum,
+                         IPDF_DataAvail::DownloadHints* pHints,
+                         FX_BOOL* pExistInFile);
+  FX_BOOL GetPageKids(CPDF_Parser* pParser, CPDF_Object* pPages);
+  FX_BOOL PreparePageItem();
+  FX_BOOL LoadPages(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL LoadAllXref(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL LoadAllFile(IPDF_DataAvail::DownloadHints* pHints);
+  DocAvailStatus CheckLinearizedData(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckPageAnnots(int iPage, IPDF_DataAvail::DownloadHints* pHints);
+
+  DocAvailStatus CheckLinearizedFirstPage(
+      int iPage,
+      IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL HaveResourceAncestor(CPDF_Dictionary* pDict);
+  FX_BOOL CheckPage(int32_t iPage, IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL LoadDocPages(IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL LoadDocPage(int32_t iPage, IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckPageNode(PageNode& pageNodes,
+                        int32_t iPage,
+                        int32_t& iCount,
+                        IPDF_DataAvail::DownloadHints* pHints,
+                        int level);
+  FX_BOOL CheckUnkownPageNode(FX_DWORD dwPageNo,
+                              PageNode* pPageNode,
+                              IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckArrayPageNode(FX_DWORD dwPageNo,
+                             PageNode* pPageNode,
+                             IPDF_DataAvail::DownloadHints* pHints);
+  FX_BOOL CheckPageCount(IPDF_DataAvail::DownloadHints* pHints);
+  bool IsFirstCheck(int iPage);
+  void ResetFirstCheck(int iPage);
+  FX_BOOL IsDataAvail(FX_FILESIZE offset,
+                      FX_DWORD size,
+                      IPDF_DataAvail::DownloadHints* pHints);
+
+  CPDF_Parser m_parser;
+  CPDF_SyntaxParser m_syntaxParser;
+  CPDF_Object* m_pRoot;
+  FX_DWORD m_dwRootObjNum;
+  FX_DWORD 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<FX_DWORD> m_ObjectSet;
+  CFX_ArrayTemplate<CPDF_Object*> m_objs_array;
+  FX_FILESIZE m_Pos;
+  FX_FILESIZE m_bufferOffset;
+  FX_DWORD m_bufferSize;
+  CFX_ByteString m_WordBuf;
+  uint8_t m_bufferData[512];
+  CFX_DWordArray m_XRefStreamList;
+  CFX_DWordArray m_PageObjList;
+  FX_DWORD m_PagesObjNum;
+  FX_BOOL m_bLinearized;
+  FX_DWORD 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;
+  FX_DWORD m_dwAcroFormObjNum;
+  FX_BOOL m_bAcroFormLoad;
+  CPDF_Object* m_pAcroForm;
+  CFX_ArrayTemplate<CPDF_Object*> m_arrayAcroforms;
+  CPDF_Dictionary* m_pPageDict;
+  CPDF_Object* m_pPageResource;
+  FX_BOOL m_bNeedDownLoadResource;
+  FX_BOOL m_bPageLoadedOK;
+  FX_BOOL m_bLinearizedFormParamLoad;
+  CFX_ArrayTemplate<CPDF_Object*> m_PagesArray;
+  FX_DWORD m_dwEncryptObjNum;
+  FX_FILESIZE m_dwPrevXRefOffset;
+  FX_BOOL m_bTotalLoadPageTree;
+  FX_BOOL m_bCurPageDictLoadOK;
+  PageNode m_pageNodes;
+  std::set<FX_DWORD> m_pageMapCheckState;
+  std::set<FX_DWORD> m_pagesLoadState;
+  std::unique_ptr<CPDF_HintTables> m_pHintTables;
+  FX_BOOL m_bSupportHintTable;
+};
+
+#endif  // CORE_SRC_FPDFAPI_FPDF_PARSER_CPDF_DATA_AVAIL_H_