1 files changed, 38 insertions, 2 deletions
diff --git a/core/fpdfapi/fpdf_page/cpdf_contentmark.cpp b/core/fpdfapi/fpdf_page/cpdf_contentmark.cpp
index 06a6a50443..c36f407c36 100644
--- a/core/fpdfapi/fpdf_page/cpdf_contentmark.cpp
+++ b/core/fpdfapi/fpdf_page/cpdf_contentmark.cpp
@@ -6,8 +6,44 @@
 
 #include "core/fpdfapi/fpdf_page/cpdf_contentmark.h"
 
+CPDF_ContentMark::CPDF_ContentMark() {}
+
+CPDF_ContentMark::CPDF_ContentMark(const CPDF_ContentMark& that)
+    : m_Ref(that.m_Ref) {}
+
+CPDF_ContentMark::~CPDF_ContentMark() {}
+
+void CPDF_ContentMark::SetNull() {
+  m_Ref.SetNull();
+}
+
+int CPDF_ContentMark::CountItems() const {
+  return m_Ref.GetObject()->CountItems();
+}
+
+const CPDF_ContentMarkItem& CPDF_ContentMark::GetItem(int i) const {
+  return m_Ref.GetObject()->GetItem(i);
+}
+
+int CPDF_ContentMark::GetMCID() const {
+  const CPDF_ContentMarkData* pData = m_Ref.GetObject();
+  return pData ? pData->GetMCID() : -1;
+}
+
+void CPDF_ContentMark::AddMark(const CFX_ByteString& name,
+                               CPDF_Dictionary* pDict,
+                               FX_BOOL bDirect) {
+  m_Ref.GetPrivateCopy()->AddMark(name, pDict, bDirect);
+}
+
+void CPDF_ContentMark::DeleteLastMark() {
+  m_Ref.GetPrivateCopy()->DeleteLastMark();
+  if (CountItems() == 0)
+    m_Ref.SetNull();
+}
+
 bool CPDF_ContentMark::HasMark(const CFX_ByteStringC& mark) const {
-  const CPDF_ContentMarkData* pData = GetObject();
+  const CPDF_ContentMarkData* pData = m_Ref.GetObject();
   if (!pData)
     return false;
 
@@ -20,7 +56,7 @@ bool CPDF_ContentMark::HasMark(const CFX_ByteStringC& mark) const {
 
 bool CPDF_ContentMark::LookupMark(const CFX_ByteStringC& mark,
                                   CPDF_Dictionary*& pDict) const {
-  const CPDF_ContentMarkData* pData = GetObject();
+  const CPDF_ContentMarkData* pData = m_Ref.GetObject();
   if (!pData)
     return false;