Use unique_ptr for CFDE_XMLDoc::m_pRoot

Remove some less helpful helper methods.

Change-Id: Id027e31b6584156263c4aa0c2888e91fa44e4b0b
Reviewed-on: https://pdfium-review.googlesource.com/3150
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

2 files changed, 13 insertions, 35 deletions

diff --git a/xfa/fde/xml/fde_xml_imp.cpp b/xfa/fde/xml/fde_xml_imp.cpp
index 28384451e4..ade8fc0557 100644
--- a/xfa/fde/xml/fde_xml_imp.cpp
+++ b/xfa/fde/xml/fde_xml_imp.cpp
@@ -11,6 +11,7 @@
 
 #include "core/fxcrt/fx_ext.h"
 #include "core/fxcrt/fx_safe_types.h"
+#include "third_party/base/ptr_util.h"
 #include "third_party/base/stl_util.h"
 #include "xfa/fgas/crt/fgas_codepage.h"
 
@@ -909,40 +910,20 @@ CFDE_XMLNode* CFDE_XMLCharData::Clone(bool bRecursive) {
 
 CFDE_XMLCharData::~CFDE_XMLCharData() {}
 
-CFDE_XMLDoc::CFDE_XMLDoc() : m_pRoot(nullptr) {
-  Reset(true);
-  CFDE_XMLInstruction* pXML = new CFDE_XMLInstruction(L"xml");
-  m_pRoot->InsertChildNode(pXML);
+CFDE_XMLDoc::CFDE_XMLDoc()
+    : m_iStatus(0), m_pRoot(pdfium::MakeUnique<CFDE_XMLNode>()) {
+  m_pRoot->InsertChildNode(new CFDE_XMLInstruction(L"xml"));
 }
 
-CFDE_XMLDoc::~CFDE_XMLDoc() {
-  Reset(false);
-}
-
-void CFDE_XMLDoc::Reset(bool bInitRoot) {
-  m_iStatus = 0;
-  m_pStream = nullptr;
-  if (bInitRoot) {
-    if (m_pRoot)
-      m_pRoot->DeleteChildren();
-    else
-      m_pRoot = new CFDE_XMLNode;
-  } else {
-    delete m_pRoot;
-    m_pRoot = nullptr;
-  }
-  ReleaseParser();
-}
-
-void CFDE_XMLDoc::ReleaseParser() {
-  m_pXMLParser.reset();
-}
+CFDE_XMLDoc::~CFDE_XMLDoc() {}
 
 bool CFDE_XMLDoc::LoadXML(std::unique_ptr<IFDE_XMLParser> pXMLParser) {
   if (!pXMLParser)
     return false;
 
-  Reset(true);
+  m_iStatus = 0;
+  m_pStream.Reset();
+  m_pRoot->DeleteChildren();
   m_pXMLParser = std::move(pXMLParser);
   return true;
 }
@@ -955,7 +936,7 @@ int32_t CFDE_XMLDoc::DoLoad(IFX_Pause* pPause) {
 }
 
 void CFDE_XMLDoc::CloseXML() {
-  ReleaseParser();
+  m_pXMLParser.reset();
 }
 
 void CFDE_XMLDoc::SaveXMLNode(const CFX_RetainPtr<IFGAS_Stream>& pXMLStream,
diff --git a/xfa/fde/xml/fde_xml_imp.h b/xfa/fde/xml/fde_xml_imp.h
index 687a0cd416..ad2ccc467c 100644
--- a/xfa/fde/xml/fde_xml_imp.h
+++ b/xfa/fde/xml/fde_xml_imp.h
@@ -194,19 +194,16 @@ class CFDE_XMLDoc {
   bool LoadXML(std::unique_ptr<IFDE_XMLParser> pXMLParser);
   int32_t DoLoad(IFX_Pause* pPause = nullptr);
   void CloseXML();
-  CFDE_XMLNode* GetRoot() const { return m_pRoot; }
+  CFDE_XMLNode* GetRoot() const { return m_pRoot.get(); }
   void SaveXML(CFX_RetainPtr<IFGAS_Stream>& pXMLStream, bool bSaveBOM = true);
   void SaveXMLNode(const CFX_RetainPtr<IFGAS_Stream>& pXMLStream,
                    CFDE_XMLNode* pNode);
 
- protected:
-  void Reset(bool bInitRoot);
-  void ReleaseParser();
-
-  CFX_RetainPtr<IFGAS_Stream> m_pStream;
+ private:
   int32_t m_iStatus;
-  CFDE_XMLNode* m_pRoot;
+  std::unique_ptr<CFDE_XMLNode> m_pRoot;
   std::unique_ptr<IFDE_XMLParser> m_pXMLParser;
+  CFX_RetainPtr<IFGAS_Stream> m_pStream;
 };
 
 class IFDE_XMLParser {