Mege to XFA: Redo CPDF_PageObjects - part 1

Original Review URL: https://codereview.chromium.org/1601093009 .
(cherry picked from commit da9355139b5dce270be02af31db326d60f488e8c)

Trivial conflicts/changes in fpdfeditpage.cpp and fpdfxfa_page.cpp.

TBR=ochang@chromium.org

Review URL: https://codereview.chromium.org/1613823003 .

5 files changed, 41 insertions, 64 deletions

diff --git a/core/include/fpdfapi/fpdf_page.h b/core/include/fpdfapi/fpdf_page.h
index edcef3c0b6..2ff8a0596b 100644
--- a/core/include/fpdfapi/fpdf_page.h
+++ b/core/include/fpdfapi/fpdf_page.h
@@ -7,11 +7,12 @@
 #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"
-#include "fpdf_parser.h"
-#include "fpdf_resource.h"
 
-class CPDF_PageObjects;
 class CPDF_Page;
 class CPDF_Form;
 class CPDF_ParseOptions;
@@ -27,7 +28,7 @@ class CPDF_StreamContentParser;
 
 class CPDF_PageObjects {
  public:
-  CPDF_PageObjects(FX_BOOL bReleaseMembers = TRUE);
+  CPDF_PageObjects();
   ~CPDF_PageObjects();
 
   void ContinueParse(IFX_Pause* pPause);
@@ -54,6 +55,7 @@ class CPDF_PageObjects {
     return (CPDF_PageObject*)m_ObjectList.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;
@@ -66,9 +68,12 @@ class CPDF_PageObjects {
   void Transform(const CFX_Matrix& matrix);
 
   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; }
   CFX_FloatRect CalcBoundingBox() const;
 
   CPDF_Dictionary* m_pFormDict;
@@ -80,21 +85,15 @@ class CPDF_PageObjects {
   int m_Transparency;
 
  protected:
-  friend class CPDF_ContentParser;
-  friend class CPDF_StreamContentParser;
-  friend class CPDF_AllStates;
-
   enum ParseState { CONTENT_NOT_PARSED, CONTENT_PARSING, CONTENT_PARSED };
 
   void LoadTransInfo();
-  void ClearCacheObjects();
 
-  CFX_PtrList m_ObjectList;
   FX_BOOL m_bBackgroundAlphaNeeded;
   FX_BOOL m_bHasImageMask;
-  FX_BOOL m_bReleaseMembers;
-  CPDF_ContentParser* m_pParser;
   ParseState m_ParseState;
+  std::unique_ptr<CPDF_ContentParser> m_pParser;
+  CFX_PtrList m_ObjectList;
 };
 
 class CPDF_Page : public CPDF_PageObjects, public CFX_PrivateData {
@@ -106,9 +105,7 @@ class CPDF_Page : public CPDF_PageObjects, public CFX_PrivateData {
             CPDF_Dictionary* pPageDict,
             FX_BOOL bPageCache = TRUE);
 
-  void StartParse(CPDF_ParseOptions* pOptions = NULL, FX_BOOL bReParse = FALSE);
-  void ParseContent(CPDF_ParseOptions* pOptions = NULL,
-                    FX_BOOL bReParse = FALSE);
+  void ParseContent(CPDF_ParseOptions* pOptions);
 
   void GetDisplayMatrix(CFX_Matrix& matrix,
                         int xPos,
@@ -126,6 +123,8 @@ class CPDF_Page : public CPDF_PageObjects, public CFX_PrivateData {
 
  protected:
   friend class CPDF_ContentParser;
+  void StartParse(CPDF_ParseOptions* pOptions);
+
   FX_FLOAT m_PageWidth;
   FX_FLOAT m_PageHeight;
   CFX_Matrix m_PageMatrix;
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
index 7e2492fad7..1d18b5343d 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
@@ -666,24 +666,18 @@ void CPDF_FormObject::CalcBoundingBox() {
   m_Right = form_rect.right;
   m_Top = form_rect.top;
 }
-CPDF_PageObjects::CPDF_PageObjects(FX_BOOL bReleaseMembers)
+CPDF_PageObjects::CPDF_PageObjects()
     : m_pFormDict(nullptr),
       m_pFormStream(nullptr),
       m_pDocument(nullptr),
       m_pPageResources(nullptr),
       m_pResources(nullptr),
       m_Transparency(0),
-      m_ObjectList(128),
       m_bBackgroundAlphaNeeded(FALSE),
       m_bHasImageMask(FALSE),
-      m_bReleaseMembers(bReleaseMembers),
-      m_pParser(nullptr),
-      m_ParseState(CONTENT_NOT_PARSED) {}
+      m_ParseState(CONTENT_NOT_PARSED),
+      m_ObjectList(128) {}
 CPDF_PageObjects::~CPDF_PageObjects() {
-  delete m_pParser;
-  if (!m_bReleaseMembers) {
-    return;
-  }
   FX_POSITION pos = m_ObjectList.GetHeadPosition();
   while (pos) {
     delete (CPDF_PageObject*)m_ObjectList.GetNext(pos);
@@ -696,8 +690,7 @@ void CPDF_PageObjects::ContinueParse(IFX_Pause* pPause) {
   m_pParser->Continue(pPause);
   if (m_pParser->GetStatus() == CPDF_ContentParser::Done) {
     m_ParseState = CONTENT_PARSED;
-    delete m_pParser;
-    m_pParser = NULL;
+    m_pParser.reset();
   }
 }
 FX_POSITION CPDF_PageObjects::InsertObject(FX_POSITION posInsertAfter,
@@ -774,21 +767,9 @@ void CPDF_PageObjects::LoadTransInfo() {
     m_Transparency |= PDFTRANS_KNOCKOUT;
   }
 }
-void CPDF_PageObjects::ClearCacheObjects() {
-  m_ParseState = CONTENT_NOT_PARSED;
-  delete m_pParser;
-  m_pParser = NULL;
-  if (m_bReleaseMembers) {
-    FX_POSITION pos = m_ObjectList.GetHeadPosition();
-    while (pos) {
-      delete (CPDF_PageObject*)m_ObjectList.GetNext(pos);
-    }
-  }
-  m_ObjectList.RemoveAll();
-}
-CPDF_Page::CPDF_Page() {
-  m_pPageRender = NULL;
-}
+
+CPDF_Page::CPDF_Page() : m_pPageRender(nullptr) {}
+
 void CPDF_Page::Load(CPDF_Document* pDocument,
                      CPDF_Dictionary* pPageDict,
                      FX_BOOL bPageCache) {
@@ -858,20 +839,17 @@ void CPDF_Page::Load(CPDF_Document* pDocument,
   m_Transparency = PDFTRANS_ISOLATED;
   LoadTransInfo();
 }
-void CPDF_Page::StartParse(CPDF_ParseOptions* pOptions, FX_BOOL bReParse) {
-  if (bReParse) {
-    ClearCacheObjects();
-  }
+void CPDF_Page::StartParse(CPDF_ParseOptions* pOptions) {
   if (m_ParseState == CONTENT_PARSED || m_ParseState == CONTENT_PARSING) {
     return;
   }
-  m_pParser = new CPDF_ContentParser;
+  m_pParser.reset(new CPDF_ContentParser);
   m_pParser->Start(this, pOptions);
   m_ParseState = CONTENT_PARSING;
 }
-void CPDF_Page::ParseContent(CPDF_ParseOptions* pOptions, FX_BOOL bReParse) {
-  StartParse(pOptions, bReParse);
-  ContinueParse(NULL);
+void CPDF_Page::ParseContent(CPDF_ParseOptions* pOptions) {
+  StartParse(pOptions);
+  ContinueParse(nullptr);
 }
 CPDF_Page::~CPDF_Page() {
   if (m_pPageRender) {
@@ -928,7 +906,7 @@ void CPDF_Form::StartParse(CPDF_AllStates* pGraphicStates,
   if (m_ParseState == CONTENT_PARSED || m_ParseState == CONTENT_PARSING) {
     return;
   }
-  m_pParser = new CPDF_ContentParser;
+  m_pParser.reset(new CPDF_ContentParser);
   m_pParser->Start(this, pGraphicStates, pParentMatrix, pType3Char, pOptions,
                    level);
   m_ParseState = CONTENT_PARSING;
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
index dd16aa85ce..e9f1747097 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_graph_state.cpp
@@ -520,7 +520,7 @@ void CPDF_AllStates::ProcessExtGS(CPDF_Dictionary* pGS,
 
         pGeneralState->SetBlendMode(mode);
         if (pGeneralState->m_BlendType > FXDIB_BLEND_MULTIPLY) {
-          pParser->GetObjectList()->m_bBackgroundAlphaNeeded = TRUE;
+          pParser->GetObjectList()->SetBackgroundAlphaNeeded(TRUE);
         }
         break;
       }
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
index 6ed3d3fc0e..08b10e5500 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser.cpp
@@ -738,8 +738,8 @@ void CPDF_StreamContentParser::Handle_ExecuteXObject() {
     CPDF_ImageObject* pObj = AddImage(pXObject, NULL, FALSE);
     m_LastImageName = name;
     m_pLastImage = pObj->m_pImage;
-    if (!m_pObjectList->m_bHasImageMask)
-      m_pObjectList->m_bHasImageMask = m_pLastImage->IsMask();
+    if (!m_pObjectList->HasImageMask())
+      m_pObjectList->SetHasImageMask(m_pLastImage->IsMask());
   } else if (type == "Form") {
     AddForm(pXObject);
   } else {
@@ -791,13 +791,13 @@ void CPDF_StreamContentParser::AddForm(CPDF_Stream* pStream) {
   status.m_ColorState = m_pCurStates->m_ColorState;
   status.m_TextState = m_pCurStates->m_TextState;
   pFormObj->m_pForm->ParseContent(&status, NULL, NULL, &m_Options, m_Level + 1);
-  if (!m_pObjectList->m_bBackgroundAlphaNeeded &&
-      pFormObj->m_pForm->m_bBackgroundAlphaNeeded) {
-    m_pObjectList->m_bBackgroundAlphaNeeded = TRUE;
+  if (!m_pObjectList->BackgroundAlphaNeeded() &&
+      pFormObj->m_pForm->BackgroundAlphaNeeded()) {
+    m_pObjectList->SetBackgroundAlphaNeeded(TRUE);
   }
   pFormObj->CalcBoundingBox();
   SetGraphicStates(pFormObj, TRUE, TRUE, TRUE);
-  m_pObjectList->m_ObjectList.AddTail(pFormObj);
+  m_pObjectList->AddTail(pFormObj);
 }
 
 CPDF_ImageObject* CPDF_StreamContentParser::AddImage(CPDF_Stream* pStream,
@@ -822,7 +822,7 @@ CPDF_ImageObject* CPDF_StreamContentParser::AddImage(CPDF_Stream* pStream,
   SetGraphicStates(pImageObj, pImageObj->m_pImage->IsMask(), FALSE, FALSE);
   pImageObj->m_Matrix = ImageMatrix;
   pImageObj->CalcBoundingBox();
-  m_pObjectList->m_ObjectList.AddTail(pImageObj);
+  m_pObjectList->AddTail(pImageObj);
   return pImageObj;
 }
 
@@ -1211,7 +1211,7 @@ void CPDF_StreamContentParser::Handle_ShadeFill() {
   pObj->m_Right = bbox.right;
   pObj->m_Top = bbox.top;
   pObj->m_Bottom = bbox.bottom;
-  m_pObjectList->m_ObjectList.AddTail(pObj);
+  m_pObjectList->AddTail(pObj);
 }
 
 void CPDF_StreamContentParser::Handle_SetCharSpace() {
@@ -1389,7 +1389,7 @@ void CPDF_StreamContentParser::AddTextObject(CFX_ByteString* pStrs,
     pCopy->Copy(pText);
     m_ClipTextList.Add(pCopy);
   }
-  m_pObjectList->m_ObjectList.AddTail(pText);
+  m_pObjectList->AddTail(pText);
   if (pKerning && pKerning[nsegs - 1] != 0) {
     if (!pFont->IsVertWriting()) {
       m_pCurStates->m_TextX -=
@@ -1624,7 +1624,7 @@ void CPDF_StreamContentParser::AddPathObject(int FillType, FX_BOOL bStroke) {
     pPathObj->m_Matrix = matrix;
     SetGraphicStates(pPathObj, TRUE, FALSE, TRUE);
     pPathObj->CalcBoundingBox();
-    m_pObjectList->m_ObjectList.AddTail(pPathObj);
+    m_pObjectList->AddTail(pPathObj);
   }
   if (PathClipType) {
     if (!matrix.IsIdentity()) {
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
index 9e9b55177b..298f28235f 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp
@@ -841,10 +841,10 @@ void CPDF_ContentParser::Continue(IFX_Pause* pPause) {
         m_pType3Char->m_BBox.top =
             FXSYS_round(m_pParser->GetType3Data()[5] * 1000);
       }
-      FX_POSITION pos = m_pObjects->m_ObjectList.GetHeadPosition();
+      FX_POSITION pos = m_pObjects->GetFirstObjectPosition();
       while (pos) {
         CPDF_PageObject* pObj =
-            (CPDF_PageObject*)m_pObjects->m_ObjectList.GetNext(pos);
+            (CPDF_PageObject*)m_pObjects->GetNextObject(pos);
         if (pObj->m_ClipPath.IsNull()) {
           continue;
         }