Split CPDF_PageObjectHolder off from CPDF_PageObjectList

core/include/fpdfapi/fpdf_page.h

 // Copyright 2014 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_INCLUDE_FPDFAPI_FPDF_PAGE_H_
 #define CORE_INCLUDE_FPDFAPI_FPDF_PAGE_H_
 
 #include <memory>
 
 #include "core/include/fpdfapi/fpdf_parser.h"
 #include "core/include/fpdfapi/fpdf_resource.h"
 #include "core/include/fxge/fx_dib.h"
 
 class CPDF_Page;
 class CPDF_Form;
 class CPDF_ParseOptions;
 class CPDF_PageObject;
 class CPDF_PageRenderCache;
 class CPDF_StreamFilter;
 class CPDF_AllStates;
 class CPDF_ContentParser;
 class CPDF_StreamContentParser;
+
 #define PDFTRANS_GROUP 0x0100
 #define PDFTRANS_ISOLATED 0x0200
 #define PDFTRANS_KNOCKOUT 0x0400
 
-class CPDF_PageObjectList {
+class CPDF_PageObjectList : public CFX_PtrList {
  public:
-  CPDF_PageObjectList();
-  ~CPDF_PageObjectList();
-
-  void ContinueParse(IFX_Pause* pPause);
-
-  FX_BOOL IsParsed() const { return m_ParseState == CONTENT_PARSED; }
-
-  FX_POSITION GetFirstObjectPosition() const {
-    return m_ObjectList.GetHeadPosition();
-  }
-
-  FX_POSITION GetLastObjectPosition() const {
-    return m_ObjectList.GetTailPosition();
-  }
+  explicit CPDF_PageObjectList(int nBlockSize) : CFX_PtrList(nBlockSize) {}
 
   CPDF_PageObject* GetNextObject(FX_POSITION& pos) const {
-    return (CPDF_PageObject*)m_ObjectList.GetNext(pos);
+    return static_cast<CPDF_PageObject*>(GetNext(pos));
   }
 
   CPDF_PageObject* GetPrevObject(FX_POSITION& pos) const {
-    return (CPDF_PageObject*)m_ObjectList.GetPrev(pos);
+    return static_cast<CPDF_PageObject*>(GetPrev(pos));
   }
 
   CPDF_PageObject* GetObjectAt(FX_POSITION pos) const {
-    return (CPDF_PageObject*)m_ObjectList.GetAt(pos);
+    return static_cast<CPDF_PageObject*>(GetAt(pos));
   }
 
-  void AddTail(CPDF_PageObject* obj) { m_ObjectList.AddTail(obj); }
-  FX_DWORD CountObjects() const { return m_ObjectList.GetCount(); }
-
-  int GetObjectIndex(CPDF_PageObject* pObj) const;
-
+  // Linear complexity, to be avoided except as needed by public APIs.
   CPDF_PageObject* GetObjectByIndex(int index) const;
 
   FX_POSITION InsertObject(FX_POSITION posInsertAfter,
                            CPDF_PageObject* pNewObject);
+};
 
-  void Transform(const CFX_Matrix& matrix);
+class CPDF_PageObjectHolder {
+ public:
+  CPDF_PageObjectHolder();
+  ~CPDF_PageObjectHolder();
+
+  void ContinueParse(IFX_Pause* pPause);
+  FX_BOOL IsParsed() const { return m_ParseState == CONTENT_PARSED; }
+
+  CPDF_PageObjectList* GetPageObjectList() { return &m_PageObjectList; }
+  const CPDF_PageObjectList* GetPageObjectList() const {
+    return &m_PageObjectList;
+  }
 
   FX_BOOL BackgroundAlphaNeeded() const { return m_bBackgroundAlphaNeeded; }
   void SetBackgroundAlphaNeeded(FX_BOOL needed) {
     m_bBackgroundAlphaNeeded = needed;
   }
 
   FX_BOOL HasImageMask() const { return m_bHasImageMask; }
   void SetHasImageMask(FX_BOOL value) { m_bHasImageMask = value; }
+
+  void Transform(const CFX_Matrix& matrix);
   CFX_FloatRect CalcBoundingBox() const;
 
   CPDF_Dictionary* m_pFormDict;
   CPDF_Stream* m_pFormStream;
   CPDF_Document* m_pDocument;
   CPDF_Dictionary* m_pPageResources;
   CPDF_Dictionary* m_pResources;
   CFX_FloatRect m_BBox;
   int m_Transparency;
 
  protected:
   enum ParseState { CONTENT_NOT_PARSED, CONTENT_PARSING, CONTENT_PARSED };
 
   void LoadTransInfo();
 
   FX_BOOL m_bBackgroundAlphaNeeded;
   FX_BOOL m_bHasImageMask;
   ParseState m_ParseState;
   std::unique_ptr<CPDF_ContentParser> m_pParser;
-  CFX_PtrList m_ObjectList;
+  CPDF_PageObjectList m_PageObjectList;
 };
 
-class CPDF_Page : public CPDF_PageObjectList, public CFX_PrivateData {
+class CPDF_Page : public CPDF_PageObjectHolder, public CFX_PrivateData {
  public:
   CPDF_Page();
   ~CPDF_Page();
 
   void Load(CPDF_Document* pDocument,
             CPDF_Dictionary* pPageDict,
             FX_BOOL bPageCache = TRUE);
 
   void ParseContent(CPDF_ParseOptions* pOptions);
 
@@ skipping 25 matching lines @@
   CPDF_ParseOptions();
 
   FX_BOOL m_bTextOnly;
 
   FX_BOOL m_bMarkedContent;
 
   FX_BOOL m_bSeparateForm;
 
   FX_BOOL m_bDecodeInlineImage;
 };
-class CPDF_Form : public CPDF_PageObjectList {
+class CPDF_Form : public CPDF_PageObjectHolder {
  public:
   CPDF_Form(CPDF_Document* pDocument,
             CPDF_Dictionary* pPageResources,
             CPDF_Stream* pFormStream,
             CPDF_Dictionary* pParentResources = NULL);
 
   ~CPDF_Form();
 
   void StartParse(CPDF_AllStates* pGraphicStates,
                   CFX_Matrix* pParentMatrix,
@@ skipping 25 matching lines @@
                    CFX_Matrix& matrix);
   CFX_ByteString RealizeResource(CPDF_Object* pResourceObj,
                                  const FX_CHAR* szType);
 
   CPDF_Page* m_pPage;
   CPDF_Document* m_pDocument;
   CFX_ArrayTemplate<CPDF_PageObject*> m_pageObjects;
 };
 
 #endif  // CORE_INCLUDE_FPDFAPI_FPDF_PAGE_H_