1 files changed, 51 insertions, 0 deletions
diff --git a/core/include/fpdfapi/cpdf_reference.h b/core/include/fpdfapi/cpdf_reference.h
new file mode 100644
index 0000000000..2444aad4fd
--- /dev/null
+++ b/core/include/fpdfapi/cpdf_reference.h
@@ -0,0 +1,51 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_INCLUDE_FPDFAPI_CPDF_REFERENCE_H_
+#define CORE_INCLUDE_FPDFAPI_CPDF_REFERENCE_H_
+
+#include "core/include/fpdfapi/cpdf_object.h"
+
+class CPDF_IndirectObjectHolder;
+
+class CPDF_Reference : public CPDF_Object {
+ public:
+  CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, int objnum);
+
+  // CPDF_Object.
+  Type GetType() const override;
+  CPDF_Object* Clone(FX_BOOL bDirect = FALSE) const override;
+  CPDF_Object* GetDirect() const override;
+  CFX_ByteString GetString() const override;
+  CFX_ByteStringC GetConstString() const override;
+  FX_FLOAT GetNumber() const override;
+  int GetInteger() const override;
+  CPDF_Dictionary* GetDict() const override;
+
+  // TODO(weili): check whether GetUnicodeText() and GetArray() are needed.
+  bool IsReference() const override;
+  CPDF_Reference* AsReference() override;
+  const CPDF_Reference* AsReference() const override;
+
+  CPDF_IndirectObjectHolder* GetObjList() const { return m_pObjList; }
+  FX_DWORD GetRefObjNum() const { return m_RefObjNum; }
+
+  void SetRef(CPDF_IndirectObjectHolder* pDoc, FX_DWORD objnum);
+
+ protected:
+  ~CPDF_Reference() override;
+  CPDF_Object* SafeGetDirect() const {
+    CPDF_Object* obj = GetDirect();
+    if (!obj || obj->IsReference())
+      return nullptr;
+    return obj;
+  }
+
+  CPDF_IndirectObjectHolder* m_pObjList;
+  FX_DWORD m_RefObjNum;
+};
+
+#endif  // CORE_INCLUDE_FPDFAPI_CPDF_REFERENCE_H_