// 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_OBJECT_H_ #define CORE_FPDFAPI_PARSER_CPDF_OBJECT_H_ #include <memory> #include <set> #include <type_traits> #include "core/fxcrt/fx_string.h" #include "core/fxcrt/fx_system.h" class CPDF_Array; class CPDF_Boolean; class CPDF_Dictionary; class CPDF_Name; class CPDF_Null; class CPDF_Number; class CPDF_Reference; class CPDF_Stream; class CPDF_String; class CPDF_Object { public: static const uint32_t kInvalidObjNum = static_cast<uint32_t>(-1); enum Type { BOOLEAN = 1, NUMBER, STRING, NAME, ARRAY, DICTIONARY, STREAM, NULLOBJ, REFERENCE }; virtual ~CPDF_Object(); virtual Type GetType() const = 0; uint32_t GetObjNum() const { return m_ObjNum; } uint32_t GetGenNum() const { return m_GenNum; } bool IsInline() const { return m_ObjNum == 0; } // Create a deep copy of the object. virtual std::unique_ptr<CPDF_Object> Clone() const = 0; // Create a deep copy of the object except any reference object be // copied to the object it points to directly. virtual std::unique_ptr<CPDF_Object> CloneDirectObject() const; virtual CPDF_Object* GetDirect() const; virtual CFX_ByteString GetString() const; virtual CFX_WideString GetUnicodeText() const; virtual float GetNumber() const; virtual int GetInteger() const; virtual CPDF_Dictionary* GetDict() const; virtual void SetString(const CFX_ByteString& str); virtual bool IsArray() const; virtual bool IsBoolean() const; virtual bool IsDictionary() const; virtual bool IsName() const; virtual bool IsNumber() const; virtual bool IsReference() const; virtual bool IsStream() const; virtual bool IsString() const; virtual CPDF_Array* AsArray(); virtual const CPDF_Array* AsArray() const; virtual CPDF_Boolean* AsBoolean(); virtual const CPDF_Boolean* AsBoolean() const; virtual CPDF_Dictionary* AsDictionary(); virtual const CPDF_Dictionary* AsDictionary() const; virtual CPDF_Name* AsName(); virtual const CPDF_Name* AsName() const; virtual CPDF_Number* AsNumber(); virtual const CPDF_Number* AsNumber() const; virtual CPDF_Reference* AsReference(); virtual const CPDF_Reference* AsReference() const; virtual CPDF_Stream* AsStream(); virtual const CPDF_Stream* AsStream() const; virtual CPDF_String* AsString(); virtual const CPDF_String* AsString() const; protected: friend class CPDF_Array; friend class CPDF_Dictionary; friend class CPDF_IndirectObjectHolder; friend class CPDF_Parser; friend class CPDF_Reference; friend class CPDF_Stream; CPDF_Object() : m_ObjNum(0), m_GenNum(0) {} std::unique_ptr<CPDF_Object> CloneObjectNonCyclic(bool bDirect) const; // Create a deep copy of the object with the option to either // copy a reference object or directly copy the object it refers to // when |bDirect| is true. // Also check cyclic reference against |pVisited|, no copy if it is found. // Complex objects should implement their own CloneNonCyclic() // function to properly check for possible loop. virtual std::unique_ptr<CPDF_Object> CloneNonCyclic( bool bDirect, std::set<const CPDF_Object*>* pVisited) const; uint32_t m_ObjNum; uint32_t m_GenNum; private: CPDF_Object(const CPDF_Object& src) {} }; template <typename T> struct CanInternStrings { static const bool value = std::is_same<T, CPDF_Array>::value || std::is_same<T, CPDF_Dictionary>::value || std::is_same<T, CPDF_Name>::value || std::is_same<T, CPDF_String>::value; }; #endif // CORE_FPDFAPI_PARSER_CPDF_OBJECT_H_