Update CPDF_IndirectObjectHolder APIs for unique objects.

Doing so highlights a few places where ownership is dubious.
Add convenience functions to return an unowned reference to
a newly-created indirect object.

Review-Url: https://codereview.chromium.org/2419173002

1 files changed, 27 insertions, 23 deletions

diff --git a/core/fpdfapi/parser/cpdf_document.cpp b/core/fpdfapi/parser/cpdf_document.cpp
index c5f64a790c..fdd395e351 100644
--- a/core/fpdfapi/parser/cpdf_document.cpp
+++ b/core/fpdfapi/parser/cpdf_document.cpp
@@ -256,7 +256,7 @@ int InsertDeletePDFPage(CPDF_Document* pDoc,
       if (nPagesToGo == 0) {
         if (bInsert) {
           pKidList->InsertAt(i, new CPDF_Reference(pDoc, pPage->GetObjNum()));
-          pPage->SetReferenceFor("Parent", pDoc, pPages->GetObjNum());
+          pPage->SetReferenceFor("Parent", pDoc, pPages);
         } else {
           pKidList->RemoveAt(i);
         }
@@ -307,7 +307,7 @@ int InsertNewPage(CPDF_Document* pDoc,
     }
     pPagesList->Add(new CPDF_Reference(pDoc, pPageDict->GetObjNum()));
     pPages->SetIntegerFor("Count", nPages + 1);
-    pPageDict->SetReferenceFor("Parent", pDoc, pPages->GetObjNum());
+    pPageDict->SetReferenceFor("Parent", pDoc, pPages);
   } else {
     std::set<CPDF_Dictionary*> stack = {pPages};
     if (InsertDeletePDFPage(pDoc, pPages, iPage, pPageDict, TRUE, &stack) < 0)
@@ -693,25 +693,23 @@ CPDF_Image* CPDF_Document::LoadImageF(CPDF_Object* pObj) {
 
 void CPDF_Document::CreateNewDoc() {
   ASSERT(!m_pRootDict && !m_pInfoDict);
-  m_pRootDict = new CPDF_Dictionary(m_pByteStringPool);
+  m_pRootDict = AddIndirectDictionary(m_pByteStringPool);
   m_pRootDict->SetNameFor("Type", "Catalog");
-  AddIndirectObject(m_pRootDict);
 
-  CPDF_Dictionary* pPages = new CPDF_Dictionary(m_pByteStringPool);
+  CPDF_Dictionary* pPages = AddIndirectDictionary(m_pByteStringPool);
   pPages->SetNameFor("Type", "Pages");
   pPages->SetNumberFor("Count", 0);
   pPages->SetFor("Kids", new CPDF_Array);
-  m_pRootDict->SetReferenceFor("Pages", this, AddIndirectObject(pPages));
-  m_pInfoDict = new CPDF_Dictionary(m_pByteStringPool);
-  AddIndirectObject(m_pInfoDict);
+
+  m_pRootDict->SetReferenceFor("Pages", this, pPages);
+  m_pInfoDict = AddIndirectDictionary(m_pByteStringPool);
 }
 
 CPDF_Dictionary* CPDF_Document::CreateNewPage(int iPage) {
-  CPDF_Dictionary* pDict = new CPDF_Dictionary(m_pByteStringPool);
+  CPDF_Dictionary* pDict = AddIndirectDictionary(m_pByteStringPool);
   pDict->SetNameFor("Type", "Page");
-  uint32_t dwObjNum = AddIndirectObject(pDict);
   if (InsertNewPage(this, iPage, pDict, m_PageList) < 0) {
-    ReleaseIndirectObject(dwObjNum);
+    DeleteIndirectObject(pDict->GetObjNum());
     return nullptr;
   }
   return pDict;
@@ -750,7 +748,8 @@ size_t CPDF_Document::CalculateEncodingDict(int charset,
   }
   if (i == FX_ArraySize(g_FX_CharsetUnicodes))
     return i;
-  CPDF_Dictionary* pEncodingDict = new CPDF_Dictionary(m_pByteStringPool);
+
+  CPDF_Dictionary* pEncodingDict = AddIndirectDictionary(m_pByteStringPool);
   pEncodingDict->SetNameFor("BaseEncoding", "WinAnsiEncoding");
   CPDF_Array* pArray = new CPDF_Array;
   pArray->AddInteger(128);
@@ -760,9 +759,7 @@ size_t CPDF_Document::CalculateEncodingDict(int charset,
     pArray->AddName(name.IsEmpty() ? ".notdef" : name);
   }
   pEncodingDict->SetFor("Differences", pArray);
-  pBaseDict->SetReferenceFor("Encoding", this,
-                             AddIndirectObject(pEncodingDict));
-
+  pBaseDict->SetReferenceFor("Encoding", this, pEncodingDict);
   return i;
 }
 
@@ -772,7 +769,7 @@ CPDF_Dictionary* CPDF_Document::ProcessbCJK(
     FX_BOOL bVert,
     CFX_ByteString basefont,
     std::function<void(FX_WCHAR, FX_WCHAR, CPDF_Array*)> Insert) {
-  CPDF_Dictionary* pFontDict = new CPDF_Dictionary(m_pByteStringPool);
+  CPDF_Dictionary* pFontDict = AddIndirectDictionary(m_pByteStringPool);
   CFX_ByteString cmap;
   CFX_ByteString ordering;
   int supplement = 0;
@@ -822,14 +819,17 @@ CPDF_Dictionary* CPDF_Document::ProcessbCJK(
   pFontDict->SetNameFor("Type", "Font");
   pFontDict->SetNameFor("Subtype", "CIDFontType2");
   pFontDict->SetNameFor("BaseFont", basefont);
+
   CPDF_Dictionary* pCIDSysInfo = new CPDF_Dictionary(m_pByteStringPool);
   pCIDSysInfo->SetStringFor("Registry", "Adobe");
   pCIDSysInfo->SetStringFor("Ordering", ordering);
   pCIDSysInfo->SetIntegerFor("Supplement", supplement);
   pFontDict->SetFor("CIDSystemInfo", pCIDSysInfo);
+
   CPDF_Array* pArray = new CPDF_Array;
   pBaseDict->SetFor("DescendantFonts", pArray);
-  pArray->AddReference(this, AddIndirectObject(pFontDict));
+
+  pArray->AddReference(this, pFontDict);
   return pFontDict;
 }
 
@@ -847,7 +847,7 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
       CalculateFlags(pFont->IsBold(), pFont->IsItalic(), pFont->IsFixedWidth(),
                      false, false, charset == FXFONT_SYMBOL_CHARSET);
 
-  CPDF_Dictionary* pBaseDict = new CPDF_Dictionary(m_pByteStringPool);
+  CPDF_Dictionary* pBaseDict = AddIndirectDictionary(m_pByteStringPool);
   pBaseDict->SetNameFor("Type", "Font");
   std::unique_ptr<CFX_UnicodeEncoding> pEncoding(
       new CFX_UnicodeEncoding(pFont));
@@ -888,7 +888,6 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
                                                 end, widthArr);
                             });
   }
-  AddIndirectObject(pBaseDict);
   int italicangle =
       pFont->GetSubstFont() ? pFont->GetSubstFont()->m_ItalicAngle : 0;
   FX_RECT bbox;
@@ -916,8 +915,11 @@ CPDF_Font* CPDF_Document::AddFont(CFX_Font* pFont, int charset, FX_BOOL bVert) {
   CPDF_Dictionary* pFontDesc =
       CalculateFontDesc(this, basefont, flags, italicangle, pFont->GetAscent(),
                         pFont->GetDescent(), pBBox, nStemV);
+
+  // TODO(tsepez): check |pFontDesc| ownership.
   pFontDict->SetReferenceFor("FontDescriptor", this,
-                             AddIndirectObject(pFontDesc));
+                             AddIndirectObject(UniqueDictionary(pFontDesc)));
+
   return LoadFont(pBaseDict);
 }
 
@@ -979,7 +981,7 @@ CPDF_Font* CPDF_Document::AddWindowsFont(LOGFONTA* pLogFont,
                  ptm->otmrcFontBox.right, ptm->otmrcFontBox.top};
   FX_Free(tm_buf);
   basefont.Replace(" ", "");
-  CPDF_Dictionary* pBaseDict = new CPDF_Dictionary(m_pByteStringPool);
+  CPDF_Dictionary* pBaseDict = AddIndirectDictionary(m_pByteStringPool);
   pBaseDict->SetNameFor("Type", "Font");
   CPDF_Dictionary* pFontDict = pBaseDict;
   if (!bCJK) {
@@ -1004,7 +1006,6 @@ CPDF_Font* CPDF_Document::AddWindowsFont(LOGFONTA* pLogFont,
                       InsertWidthArray(hDC, start, end, widthArr);
                     });
   }
-  AddIndirectObject(pBaseDict);
   CPDF_Array* pBBox = new CPDF_Array;
   for (int i = 0; i < 4; i++)
     pBBox->AddInteger(bbox[i]);
@@ -1012,8 +1013,11 @@ CPDF_Font* CPDF_Document::AddWindowsFont(LOGFONTA* pLogFont,
       CalculateFontDesc(this, basefont, flags, italicangle, ascend, descend,
                         pBBox, pLogFont->lfWeight / 5);
   pFontDesc->SetIntegerFor("CapHeight", capheight);
+
+  // TODO(tsepez): check |pFontDesc| ownership.
   pFontDict->SetReferenceFor("FontDescriptor", this,
-                             AddIndirectObject(pFontDesc));
+                             AddIndirectObject(UniqueObject(pFontDesc)));
+
   hFont = SelectObject(hDC, hFont);
   DeleteObject(hFont);
   DeleteDC(hDC);