Move CPDF_Document insert methods from namespace

core/fpdfapi/parser/cpdf_document.cpp

Index: core/fpdfapi/parser/cpdf_document.cpp
diff --git a/core/fpdfapi/parser/cpdf_document.cpp b/core/fpdfapi/parser/cpdf_document.cpp
index 1794288e62efe0784df83fd58e43dffbaed2925c..af32cf2aa5948da752e5517c9c6b0cafd4b4c1b7 100644
--- a/core/fpdfapi/parser/cpdf_document.cpp
+++ b/core/fpdfapi/parser/cpdf_document.cpp
@@ -240,83 +240,6 @@ void InsertWidthArray1(CFX_Font* pFont,
   InsertWidthArrayImpl(widths, size, pWidthArray);
 }
 
-int InsertDeletePDFPage(CPDF_Document* pDoc,
-                        CPDF_Dictionary* pPages,
-                        int nPagesToGo,
-                        CPDF_Dictionary* pPage,
-                        bool bInsert,
-                        std::set<CPDF_Dictionary*>* pVisited) {
-  CPDF_Array* pKidList = pPages->GetArrayFor("Kids");
-  if (!pKidList)
-    return -1;
-
-  for (size_t i = 0; i < pKidList->GetCount(); i++) {
-    CPDF_Dictionary* pKid = pKidList->GetDictAt(i);
-    if (pKid->GetStringFor("Type") == "Page") {
-      if (nPagesToGo == 0) {
-        if (bInsert) {
-          pKidList->InsertAt(i, new CPDF_Reference(pDoc, pPage->GetObjNum()));
-          pPage->SetReferenceFor("Parent", pDoc, pPages->GetObjNum());
-        } else {
-          pKidList->RemoveAt(i);
-        }
-        pPages->SetIntegerFor(
-            "Count", pPages->GetIntegerFor("Count") + (bInsert ? 1 : -1));
-        return 1;
-      }
-      nPagesToGo--;
-    } else {
-      int nPages = pKid->GetIntegerFor("Count");
-      if (nPagesToGo < nPages) {
-        if (pdfium::ContainsKey(*pVisited, pKid))
-          return -1;
-
-        pdfium::ScopedSetInsertion<CPDF_Dictionary*> insertion(pVisited, pKid);
-        if (InsertDeletePDFPage(pDoc, pKid, nPagesToGo, pPage, bInsert,
-                                pVisited) < 0) {
-          return -1;
-        }
-        pPages->SetIntegerFor(
-            "Count", pPages->GetIntegerFor("Count") + (bInsert ? 1 : -1));
-        return 1;
-      }
-      nPagesToGo -= nPages;
-    }
-  }
-  return 0;
-}
-
-int InsertNewPage(CPDF_Document* pDoc,
-                  int iPage,
-                  CPDF_Dictionary* pPageDict,
-                  CFX_ArrayTemplate<uint32_t>& pageList) {
-  CPDF_Dictionary* pRoot = pDoc->GetRoot();
-  CPDF_Dictionary* pPages = pRoot ? pRoot->GetDictFor("Pages") : nullptr;
-  if (!pPages)
-    return -1;
-
-  int nPages = pDoc->GetPageCount();
-  if (iPage < 0 || iPage > nPages)
-    return -1;
-
-  if (iPage == nPages) {
-    CPDF_Array* pPagesList = pPages->GetArrayFor("Kids");
-    if (!pPagesList) {
-      pPagesList = new CPDF_Array;
-      pPages->SetFor("Kids", pPagesList);
-    }
-    pPagesList->Add(new CPDF_Reference(pDoc, pPageDict->GetObjNum()));
-    pPages->SetIntegerFor("Count", nPages + 1);
-    pPageDict->SetReferenceFor("Parent", pDoc, pPages->GetObjNum());
-  } else {
-    std::set<CPDF_Dictionary*> stack = {pPages};
-    if (InsertDeletePDFPage(pDoc, pPages, iPage, pPageDict, true, &stack) < 0)
-      return -1;
-  }
-  pageList.InsertAt(iPage, pPageDict->GetObjNum());
-  return iPage;
-}
-
 int CountPages(CPDF_Dictionary* pPages,
                std::set<CPDF_Dictionary*>* visited_pages) {
   int count = pPages->GetIntegerFor("Count");
@@ -710,13 +633,88 @@ CPDF_Dictionary* CPDF_Document::CreateNewPage(int iPage) {
   CPDF_Dictionary* pDict = new CPDF_Dictionary(m_pByteStringPool);
   pDict->SetNameFor("Type", "Page");
   uint32_t dwObjNum = AddIndirectObject(pDict);
-  if (InsertNewPage(this, iPage, pDict, m_PageList) < 0) {
+  if (InsertNewPage(iPage, pDict, m_PageList) < 0) {
     ReleaseIndirectObject(dwObjNum);
     return nullptr;
   }
   return pDict;
 }
 
+int CPDF_Document::InsertDeletePDFPage(CPDF_Dictionary* pPages,

[Lei Zhang, 2016/11/03 07:01:57]

This method can just return a bool. Nobody cares whether it returns 0 or 1. All
the callers only checks for less than 0 or not.

[npm, 2016/11/03 18:34:32]

Done.

+                                       int nPagesToGo,
+                                       CPDF_Dictionary* pPage,

[Lei Zhang, 2016/11/03 07:01:57]

Name this "pPageDict" like InsertNewPage's parameter, so it's not easily
confused with |pPages| ?

[npm, 2016/11/03 18:34:32]

Done.

+                                       bool bInsert,
+                                       std::set<CPDF_Dictionary*>* pVisited) {
+  CPDF_Array* pKidList = pPages->GetArrayFor("Kids");
+  if (!pKidList)
+    return -1;
+
+  for (size_t i = 0; i < pKidList->GetCount(); i++) {
+    CPDF_Dictionary* pKid = pKidList->GetDictAt(i);
+    if (pKid->GetStringFor("Type") == "Page") {
+      if (nPagesToGo == 0) {
+        if (bInsert) {
+          pKidList->InsertAt(i, new CPDF_Reference(this, pPage->GetObjNum()));
+          pPage->SetReferenceFor("Parent", this, pPages->GetObjNum());
+        } else {
+          pKidList->RemoveAt(i);
+        }
+        pPages->SetIntegerFor(
+            "Count", pPages->GetIntegerFor("Count") + (bInsert ? 1 : -1));
+        return 1;
+      }
+      nPagesToGo--;

[Lei Zhang, 2016/11/03 07:01:57]

Some early continues can make this easier to follow:

for (...) {
  PDF_Dictionary* pKid = pKidList->GetDictAt(i);
  if (pKid->GetStringFor("Type") == "Page") {
    if (nPagesToGo != 0) {
      nPagesToGo--;
      continue;
    }
    // handle 0 case
    break;
  }

  int nPages = pKid->GetIntegerFor("Count");
  if (nPagesToGo >= nPages) {
    nPagesToGo -= nPages;
    continue;
  }
  // handle reached case
  break;
}
return true;

[npm, 2016/11/03 18:34:32]

Done.

+    } else {
+      int nPages = pKid->GetIntegerFor("Count");
+      if (nPagesToGo < nPages) {
+        if (pdfium::ContainsKey(*pVisited, pKid))
+          return -1;
+
+        pdfium::ScopedSetInsertion<CPDF_Dictionary*> insertion(pVisited, pKid);
+        if (InsertDeletePDFPage(pKid, nPagesToGo, pPage, bInsert, pVisited) <
+            0) {
+          return -1;
+        }
+        pPages->SetIntegerFor(
+            "Count", pPages->GetIntegerFor("Count") + (bInsert ? 1 : -1));
+        return 1;
+      }
+      nPagesToGo -= nPages;
+    }
+  }
+  return 0;
+}
+
+int CPDF_Document::InsertNewPage(int iPage,

[Lei Zhang, 2016/11/03 07:01:57]

This can also return a bool.

[npm, 2016/11/03 18:34:32]

Done.

+                                 CPDF_Dictionary* pPageDict,
+                                 CFX_ArrayTemplate<uint32_t>& pageList) {

[Lei Zhang, 2016/11/03 07:01:57]

Don't pass by non-const ref. It's easy to avoid here.

[npm, 2016/11/03 18:34:32]

Well, InsertAt is not const. But the param can be removed altogether.

+  CPDF_Dictionary* pRoot = GetRoot();
+  CPDF_Dictionary* pPages = pRoot ? pRoot->GetDictFor("Pages") : nullptr;
+  if (!pPages)
+    return -1;
+
+  int nPages = GetPageCount();
+  if (iPage < 0 || iPage > nPages)
+    return -1;
+
+  if (iPage == nPages) {
+    CPDF_Array* pPagesList = pPages->GetArrayFor("Kids");
+    if (!pPagesList) {
+      pPagesList = new CPDF_Array;
+      pPages->SetFor("Kids", pPagesList);
+    }
+    pPagesList->Add(new CPDF_Reference(this, pPageDict->GetObjNum()));
+    pPages->SetIntegerFor("Count", nPages + 1);
+    pPageDict->SetReferenceFor("Parent", this, pPages->GetObjNum());
+  } else {
+    std::set<CPDF_Dictionary*> stack = {pPages};
+    if (InsertDeletePDFPage(pPages, iPage, pPageDict, true, &stack) < 0)
+      return -1;
+  }
+  pageList.InsertAt(iPage, pPageDict->GetObjNum());
+  return iPage;
+}
+
 void CPDF_Document::DeletePage(int iPage) {
   CPDF_Dictionary* pPages = GetPagesDict();
   if (!pPages)
@@ -727,7 +725,7 @@ void CPDF_Document::DeletePage(int iPage) {
     return;
 
   std::set<CPDF_Dictionary*> stack = {pPages};
-  if (InsertDeletePDFPage(this, pPages, iPage, nullptr, false, &stack) < 0)
+  if (InsertDeletePDFPage(pPages, iPage, nullptr, false, &stack) < 0)
     return;
 
   m_PageList.RemoveAt(iPage);