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// 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_FPDFAPI_PARSER_CPDF_REFERENCE_H_
#define CORE_FPDFAPI_PARSER_CPDF_REFERENCE_H_
#include <memory>
#include <set>
#include "core/fpdfapi/parser/cpdf_object.h"
#include "core/fxcrt/unowned_ptr.h"
class CPDF_IndirectObjectHolder;
class CPDF_Reference final : public CPDF_Object {
public:
CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum);
~CPDF_Reference() override;
// CPDF_Object:
Type GetType() const override;
std::unique_ptr<CPDF_Object> Clone() const override;
CPDF_Object* GetDirect() override;
const CPDF_Object* GetDirect() const override;
ByteString GetString() const override;
float GetNumber() const override;
int GetInteger() const override;
CPDF_Dictionary* GetDict() override;
const CPDF_Dictionary* GetDict() const override;
bool IsReference() const override;
CPDF_Reference* AsReference() override;
const CPDF_Reference* AsReference() const override;
bool WriteTo(IFX_ArchiveStream* archive,
const CPDF_Encryptor* encryptor) const override;
std::unique_ptr<CPDF_Object> MakeReference(
CPDF_IndirectObjectHolder* holder) const override;
CPDF_IndirectObjectHolder* GetObjList() const { return m_pObjList.Get(); }
uint32_t GetRefObjNum() const { return m_RefObjNum; }
void SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum);
private:
std::unique_ptr<CPDF_Object> CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const override;
CPDF_Object* SafeGetDirect();
const CPDF_Object* SafeGetDirect() const;
UnownedPtr<CPDF_IndirectObjectHolder> m_pObjList;
uint32_t m_RefObjNum;
};
inline CPDF_Reference* ToReference(CPDF_Object* obj) {
return obj ? obj->AsReference() : nullptr;
}
inline const CPDF_Reference* ToReference(const CPDF_Object* obj) {
return obj ? obj->AsReference() : nullptr;
}
#endif // CORE_FPDFAPI_PARSER_CPDF_REFERENCE_H_
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