Remove CFX_PtrList from renderer main loop.

Exposes an iterator over the object list, but not the object
holder, since pages and forms inherit from object holder, and
we don't want to imply that there's only one thing that might
be iterated over for those classes.

R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1700183002 .

7 files changed, 51 insertions, 72 deletions

diff --git a/fpdfsdk/include/fxedit/fx_edit.h b/fpdfsdk/include/fxedit/fx_edit.h
index 359f7d85e1..5e1ac0f390 100644
--- a/fpdfsdk/include/fxedit/fx_edit.h
+++ b/fpdfsdk/include/fxedit/fx_edit.h
@@ -458,19 +458,19 @@ class IFX_Edit {
                            const CPDF_Point& ptOffset,
                            const CPVT_WordRange* pRange);
   static void GeneratePageObjects(
-      CPDF_PageObjectHolder* pPageObjects,
+      CPDF_PageObjectHolder* pObjectHolder,
       IFX_Edit* pEdit,
       const CPDF_Point& ptOffset,
       const CPVT_WordRange* pRange,
       FX_COLORREF crText,
       CFX_ArrayTemplate<CPDF_TextObject*>& ObjArray);
   static void GenerateRichPageObjects(
-      CPDF_PageObjectHolder* pPageObjects,
+      CPDF_PageObjectHolder* pObjectHolder,
       IFX_Edit* pEdit,
       const CPDF_Point& ptOffset,
       const CPVT_WordRange* pRange,
       CFX_ArrayTemplate<CPDF_TextObject*>& ObjArray);
-  static void GenerateUnderlineObjects(CPDF_PageObjectHolder* pPageObjects,
+  static void GenerateUnderlineObjects(CPDF_PageObjectHolder* pObjectHolder,
                                        IFX_Edit* pEdit,
                                        const CPDF_Point& ptOffset,
                                        const CPVT_WordRange* pRange,
diff --git a/fpdfsdk/include/pdfwindow/PWL_Edit.h b/fpdfsdk/include/pdfwindow/PWL_Edit.h
index 4b3411b772..73528180d9 100644
--- a/fpdfsdk/include/pdfwindow/PWL_Edit.h
+++ b/fpdfsdk/include/pdfwindow/PWL_Edit.h
@@ -110,10 +110,10 @@ class CPWL_Edit : public CPWL_EditCtrl, public IFX_Edit_OprNotify {
     m_pFillerNotify = pNotify;
   }
 
-  void GeneratePageObjects(CPDF_PageObjectHolder* pPageObjects,
+  void GeneratePageObjects(CPDF_PageObjectHolder* pObjectHolder,
                            const CPDF_Point& ptOffset,
                            CFX_ArrayTemplate<CPDF_TextObject*>& ObjArray);
-  void GeneratePageObjects(CPDF_PageObjectHolder* pPageObjects,
+  void GeneratePageObjects(CPDF_PageObjectHolder* pObjectHolder,
                            const CPDF_Point& ptOffset);
 
  protected:
diff --git a/fpdfsdk/src/fpdf_flatten.cpp b/fpdfsdk/src/fpdf_flatten.cpp
index 36b8319dca..9aee35f760 100644
--- a/fpdfsdk/src/fpdf_flatten.cpp
+++ b/fpdfsdk/src/fpdf_flatten.cpp
@@ -35,17 +35,14 @@ FX_BOOL IsValiableRect(CPDF_Rect rect, CPDF_Rect rcPage) {
   return TRUE;
 }
 
-FX_BOOL GetContentsRect(CPDF_Document* pDoc,
-                        CPDF_Dictionary* pDict,
-                        CPDF_RectArray* pRectArray) {
-  CPDF_Page* pPDFPage = new CPDF_Page;
+void GetContentsRect(CPDF_Document* pDoc,
+                     CPDF_Dictionary* pDict,
+                     CPDF_RectArray* pRectArray) {
+  std::unique_ptr<CPDF_Page> pPDFPage(new CPDF_Page);
   pPDFPage->Load(pDoc, pDict, FALSE);
   pPDFPage->ParseContent(nullptr);
 
-  FX_POSITION pos = pPDFPage->GetPageObjectList()->GetHeadPosition();
-  while (pos) {
-    CPDF_PageObject* pPageObject =
-        pPDFPage->GetPageObjectList()->GetNextObject(pos);
+  for (auto& pPageObject : *pPDFPage->GetPageObjectList()) {
     if (!pPageObject)
       continue;
 
@@ -54,14 +51,9 @@ FX_BOOL GetContentsRect(CPDF_Document* pDoc,
     rc.right = pPageObject->m_Right;
     rc.bottom = pPageObject->m_Bottom;
     rc.top = pPageObject->m_Top;
-
-    if (IsValiableRect(rc, pDict->GetRectBy("MediaBox"))) {
+    if (IsValiableRect(rc, pDict->GetRectBy("MediaBox")))
       pRectArray->Add(rc);
-    }
   }
-
-  delete pPDFPage;
-  return TRUE;
 }
 
 void ParserStream(CPDF_Dictionary* pPageDic,
diff --git a/fpdfsdk/src/fpdfeditpage.cpp b/fpdfsdk/src/fpdfeditpage.cpp
index 6d39cb100f..6c14079131 100644
--- a/fpdfsdk/src/fpdfeditpage.cpp
+++ b/fpdfsdk/src/fpdfeditpage.cpp
@@ -8,6 +8,7 @@
 
 #include "fpdfsdk/include/fsdk_define.h"
 #include "public/fpdf_formfill.h"
+#include "third_party/base/stl_util.h"
 
 #ifdef PDF_ENABLE_XFA
 #include "fpdfsdk/include/fpdfxfa/fpdfxfa_app.h"
@@ -135,9 +136,10 @@ DLLEXPORT void STDCALL FPDFPage_InsertObject(FPDF_PAGE page,
   CPDF_PageObject* pPageObj = (CPDF_PageObject*)page_obj;
   if (!pPageObj)
     return;
-  FX_POSITION LastPersition = pPage->GetPageObjectList()->GetTailPosition();
 
-  pPage->GetPageObjectList()->InsertObject(LastPersition, pPageObj);
+  pPage->GetPageObjectList()->push_back(
+      std::unique_ptr<CPDF_PageObject>(pPageObj));
+
   switch (pPageObj->m_Type) {
     case FPDF_PAGEOBJ_PATH: {
       CPDF_PathObject* pPathObj = (CPDF_PathObject*)pPageObj;
@@ -145,8 +147,6 @@ DLLEXPORT void STDCALL FPDFPage_InsertObject(FPDF_PAGE page,
       break;
     }
     case FPDF_PAGEOBJ_TEXT: {
-      //	CPDF_PathObject* pPathObj = (CPDF_PathObject*)pPageObj;
-      //	pPathObj->CalcBoundingBox();
       break;
     }
     case FPDF_PAGEOBJ_IMAGE: {
@@ -177,7 +177,7 @@ DLLEXPORT int STDCALL FPDFPage_CountObject(FPDF_PAGE page) {
           "Page")) {
     return -1;
   }
-  return pPage->GetPageObjectList()->GetCount();
+  return pdfium::CollectionSize<int>(*pPage->GetPageObjectList());
 }
 
 DLLEXPORT FPDF_PAGEOBJECT STDCALL FPDFPage_GetObject(FPDF_PAGE page,
@@ -186,9 +186,9 @@ DLLEXPORT FPDF_PAGEOBJECT STDCALL FPDFPage_GetObject(FPDF_PAGE page,
   if (!pPage || !pPage->m_pFormDict || !pPage->m_pFormDict->KeyExist("Type") ||
       pPage->m_pFormDict->GetElement("Type")->GetDirect()->GetString().Compare(
           "Page")) {
-    return NULL;
+    return nullptr;
   }
-  return pPage->GetPageObjectList()->GetObjectByIndex(index);
+  return pPage->GetPageObjectList()->GetPageObjectByIndex(index);
 }
 
 DLLEXPORT FPDF_BOOL STDCALL FPDFPage_HasTransparency(FPDF_PAGE page) {
diff --git a/fpdfsdk/src/fxedit/fxet_pageobjs.cpp b/fpdfsdk/src/fxedit/fxet_pageobjs.cpp
index d54e4649db..c3bd79759b 100644
--- a/fpdfsdk/src/fxedit/fxet_pageobjs.cpp
+++ b/fpdfsdk/src/fxedit/fxet_pageobjs.cpp
@@ -409,10 +409,10 @@ void IFX_Edit::DrawRichEdit(CFX_RenderDevice* pDevice,
   pDevice->RestoreState();
 }
 
-static void AddRectToPageObjects(CPDF_PageObjectHolder* pPageObjs,
+static void AddRectToPageObjects(CPDF_PageObjectHolder* pObjectHolder,
                                  FX_COLORREF crFill,
                                  const CPDF_Rect& rcFill) {
-  CPDF_PathObject* pPathObj = new CPDF_PathObject;
+  std::unique_ptr<CPDF_PathObject> pPathObj(new CPDF_PathObject);
   CPDF_PathData* pPathData = pPathObj->m_Path.GetModify();
   pPathData->AppendRect(rcFill.left, rcFill.bottom, rcFill.right, rcFill.top);
 
@@ -425,12 +425,11 @@ static void AddRectToPageObjects(CPDF_PageObjectHolder* pPageObjs,
 
   pPathObj->m_FillType = FXFILL_ALTERNATE;
   pPathObj->m_bStroke = FALSE;
-  pPageObjs->GetPageObjectList()->InsertObject(
-      pPageObjs->GetPageObjectList()->GetTailPosition(), pPathObj);
+  pObjectHolder->GetPageObjectList()->push_back(std::move(pPathObj));
 }
 
 static CPDF_TextObject* AddTextObjToPageObjects(
-    CPDF_PageObjectHolder* pPageObjs,
+    CPDF_PageObjectHolder* pObjectHolder,
     FX_COLORREF crText,
     CPDF_Font* pFont,
     FX_FLOAT fFontSize,
@@ -438,8 +437,7 @@ static CPDF_TextObject* AddTextObjToPageObjects(
     int32_t nHorzScale,
     const CPDF_Point& point,
     const CFX_ByteString& text) {
-  CPDF_TextObject* pTxtObj = new CPDF_TextObject;
-
+  std::unique_ptr<CPDF_TextObject> pTxtObj(new CPDF_TextObject);
   CPDF_TextStateData* pTextStateData = pTxtObj->m_TextState.GetModify();
   pTextStateData->m_pFont = pFont;
   pTextStateData->m_FontSize = fFontSize;
@@ -462,14 +460,14 @@ static CPDF_TextObject* AddTextObjToPageObjects(
 
   pTxtObj->SetPosition(point.x, point.y);
   pTxtObj->SetText(text);
-  pPageObjs->GetPageObjectList()->InsertObject(
-      pPageObjs->GetPageObjectList()->GetTailPosition(), pTxtObj);
 
-  return pTxtObj;
+  CPDF_TextObject* pRet = pTxtObj.get();
+  pObjectHolder->GetPageObjectList()->push_back(std::move(pTxtObj));
+  return pRet;
 }
 
 void IFX_Edit::GeneratePageObjects(
-    CPDF_PageObjectHolder* pPageObjects,
+    CPDF_PageObjectHolder* pObjectHolder,
     IFX_Edit* pEdit,
     const CPDF_Point& ptOffset,
     const CPVT_WordRange* pRange,
@@ -504,7 +502,7 @@ void IFX_Edit::GeneratePageObjects(
               nOldFontIndex != word.nFontIndex) {
             if (sTextBuf.GetLength() > 0) {
               ObjArray.Add(AddTextObjToPageObjects(
-                  pPageObjects, crText, pFontMap->GetPDFFont(nOldFontIndex),
+                  pObjectHolder, crText, pFontMap->GetPDFFont(nOldFontIndex),
                   fFontSize, 0.0f, 100,
                   CPDF_Point(ptBT.x + ptOffset.x, ptBT.y + ptOffset.y),
                   sTextBuf.GetByteString()));
@@ -523,7 +521,7 @@ void IFX_Edit::GeneratePageObjects(
 
       if (sTextBuf.GetLength() > 0) {
         ObjArray.Add(AddTextObjToPageObjects(
-            pPageObjects, crText, pFontMap->GetPDFFont(nOldFontIndex),
+            pObjectHolder, crText, pFontMap->GetPDFFont(nOldFontIndex),
             fFontSize, 0.0f, 100,
             CPDF_Point(ptBT.x + ptOffset.x, ptBT.y + ptOffset.y),
             sTextBuf.GetByteString()));
@@ -533,7 +531,7 @@ void IFX_Edit::GeneratePageObjects(
 }
 
 void IFX_Edit::GenerateRichPageObjects(
-    CPDF_PageObjectHolder* pPageObjects,
+    CPDF_PageObjectHolder* pObjectHolder,
     IFX_Edit* pEdit,
     const CPDF_Point& ptOffset,
     const CPVT_WordRange* pRange,
@@ -574,7 +572,7 @@ void IFX_Edit::GenerateRichPageObjects(
               crOld != crCurText) {
             if (sTextBuf.GetLength() > 0) {
               ObjArray.Add(AddTextObjToPageObjects(
-                  pPageObjects, crOld, pFontMap->GetPDFFont(wp.nFontIndex),
+                  pObjectHolder, crOld, pFontMap->GetPDFFont(wp.nFontIndex),
                   wp.fFontSize, wp.fCharSpace, wp.nHorzScale,
                   CPDF_Point(ptBT.x + ptOffset.x, ptBT.y + ptOffset.y),
                   sTextBuf.GetByteString()));
@@ -597,7 +595,7 @@ void IFX_Edit::GenerateRichPageObjects(
             rcUnderline.top += ptOffset.y;
             rcUnderline.bottom += ptOffset.y;
 
-            AddRectToPageObjects(pPageObjects, crCurText, rcUnderline);
+            AddRectToPageObjects(pObjectHolder, crCurText, rcUnderline);
           }
 
           if (word.WordProps.nWordStyle & PVTWORD_STYLE_CROSSOUT) {
@@ -607,7 +605,7 @@ void IFX_Edit::GenerateRichPageObjects(
             rcCrossout.top += ptOffset.y;
             rcCrossout.bottom += ptOffset.y;
 
-            AddRectToPageObjects(pPageObjects, crCurText, rcCrossout);
+            AddRectToPageObjects(pObjectHolder, crCurText, rcCrossout);
           }
 
           oldplace = place;
@@ -616,7 +614,7 @@ void IFX_Edit::GenerateRichPageObjects(
 
       if (sTextBuf.GetLength() > 0) {
         ObjArray.Add(AddTextObjToPageObjects(
-            pPageObjects, crOld, pFontMap->GetPDFFont(wp.nFontIndex),
+            pObjectHolder, crOld, pFontMap->GetPDFFont(wp.nFontIndex),
             wp.fFontSize, wp.fCharSpace, wp.nHorzScale,
             CPDF_Point(ptBT.x + ptOffset.x, ptBT.y + ptOffset.y),
             sTextBuf.GetByteString()));
@@ -625,7 +623,7 @@ void IFX_Edit::GenerateRichPageObjects(
   }
 }
 
-void IFX_Edit::GenerateUnderlineObjects(CPDF_PageObjectHolder* pPageObjects,
+void IFX_Edit::GenerateUnderlineObjects(CPDF_PageObjectHolder* pObjectHolder,
                                         IFX_Edit* pEdit,
                                         const CPDF_Point& ptOffset,
                                         const CPVT_WordRange* pRange,
@@ -651,7 +649,7 @@ void IFX_Edit::GenerateUnderlineObjects(CPDF_PageObjectHolder* pPageObjects,
           rcUnderline.right += ptOffset.x;
           rcUnderline.top += ptOffset.y;
           rcUnderline.bottom += ptOffset.y;
-          AddRectToPageObjects(pPageObjects, color, rcUnderline);
+          AddRectToPageObjects(pObjectHolder, color, rcUnderline);
         }
       }
     }
diff --git a/fpdfsdk/src/javascript/Document.cpp b/fpdfsdk/src/javascript/Document.cpp
index c2638d012d..733384a154 100644
--- a/fpdfsdk/src/javascript/Document.cpp
+++ b/fpdfsdk/src/javascript/Document.cpp
@@ -1382,20 +1382,15 @@ FX_BOOL Document::getPageNthWord(IJS_Context* cc,
 
   int nWords = 0;
   CFX_WideString swRet;
-  FX_POSITION pos = page.GetPageObjectList()->GetHeadPosition();
-  while (pos) {
-    if (CPDF_PageObject* pPageObj =
-            page.GetPageObjectList()->GetNextObject(pos)) {
-      if (pPageObj->m_Type == CPDF_PageObject::TEXT) {
-        int nObjWords = CountWords((CPDF_TextObject*)pPageObj);
-
-        if (nWords + nObjWords >= nWordNo) {
-          swRet = GetObjWordStr((CPDF_TextObject*)pPageObj, nWordNo - nWords);
-          break;
-        }
-
-        nWords += nObjWords;
+  for (auto& pPageObj : *page.GetPageObjectList()) {
+    if (pPageObj->m_Type == CPDF_PageObject::TEXT) {
+      CPDF_TextObject* pTextObj = static_cast<CPDF_TextObject*>(pPageObj.get());
+      int nObjWords = CountWords(pTextObj);
+      if (nWords + nObjWords >= nWordNo) {
+        swRet = GetObjWordStr(pTextObj, nWordNo - nWords);
+        break;
       }
+      nWords += nObjWords;
     }
   }
 
@@ -1442,15 +1437,9 @@ FX_BOOL Document::getPageNumWords(IJS_Context* cc,
   page.ParseContent(nullptr);
 
   int nWords = 0;
-  FX_POSITION pos = page.GetPageObjectList()->GetHeadPosition();
-  while (pos) {
-    if (CPDF_PageObject* pPageObj =
-            page.GetPageObjectList()->GetNextObject(pos)) {
-      if (pPageObj->m_Type == CPDF_PageObject::TEXT) {
-        CPDF_TextObject* pTextObj = (CPDF_TextObject*)pPageObj;
-        nWords += CountWords(pTextObj);
-      }
-    }
+  for (auto& pPageObj : *page.GetPageObjectList()) {
+    if (pPageObj->m_Type == CPDF_PageObject::TEXT)
+      nWords += CountWords(static_cast<CPDF_TextObject*>(pPageObj.get()));
   }
 
   vRet = nWords;
diff --git a/fpdfsdk/src/pdfwindow/PWL_Edit.cpp b/fpdfsdk/src/pdfwindow/PWL_Edit.cpp
index 4b3886a11d..ce9274aeb9 100644
--- a/fpdfsdk/src/pdfwindow/PWL_Edit.cpp
+++ b/fpdfsdk/src/pdfwindow/PWL_Edit.cpp
@@ -1166,20 +1166,20 @@ CPVT_WordRange CPWL_Edit::GetSameWordsRange(const CPVT_WordPlace& place,
 }
 
 void CPWL_Edit::GeneratePageObjects(
-    CPDF_PageObjectHolder* pPageObjects,
+    CPDF_PageObjectHolder* pObjectHolder,
     const CPDF_Point& ptOffset,
     CFX_ArrayTemplate<CPDF_TextObject*>& ObjArray) {
   IFX_Edit::GeneratePageObjects(
-      pPageObjects, m_pEdit, ptOffset, NULL,
+      pObjectHolder, m_pEdit, ptOffset, NULL,
       CPWL_Utils::PWLColorToFXColor(GetTextColor(), GetTransparency()),
       ObjArray);
 }
 
-void CPWL_Edit::GeneratePageObjects(CPDF_PageObjectHolder* pPageObjects,
+void CPWL_Edit::GeneratePageObjects(CPDF_PageObjectHolder* pObjectHolder,
                                     const CPDF_Point& ptOffset) {
   CFX_ArrayTemplate<CPDF_TextObject*> ObjArray;
   IFX_Edit::GeneratePageObjects(
-      pPageObjects, m_pEdit, ptOffset, NULL,
+      pObjectHolder, m_pEdit, ptOffset, NULL,
       CPWL_Utils::PWLColorToFXColor(GetTextColor(), GetTransparency()),
       ObjArray);
 }