chromium/third_party/pdfium/core/fpdfapi/parser/cpdf_object.h

// Copyright 2016 The PDFium Authors
// 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 <stdint.h>

#include <set>
#include <type_traits>

#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/retain_ptr.h"

class CPDF_Array;
class CPDF_Boolean;
class CPDF_Dictionary;
class CPDF_Encryptor;
class CPDF_IndirectObjectHolder;
class CPDF_Name;
class CPDF_Null;
class CPDF_Number;
class CPDF_Reference;
class CPDF_Stream;
class CPDF_String;
class IFX_ArchiveStream;

// ISO 32000-1:2008 defines PDF objects. When CPDF_Parser parses a PDF object,
// it represents the PDF object using CPDF_Objects. Take this PDF object for
// example:
//
// 4 0 obj <<
//   /Type /Pages
//   /Count 1
//   /Kids [9 0 R]
// >>
//
// Multiple CPDF_Objects instances are necessary to represent this PDF object:
// 1) A CPDF_Dictionary with object number 4 that contains 3 elements.
// 2) A CPDF_Name for /Pages.
// 3) A CPDF_Number for the count of 1.
// 4) A CPDF_Array for [9 0 R], which contains 1 element.
// 5) A CPDF_Reference that references object 9 0.
//
// CPDF_Object (1) has an object number of 4. All the other CPDF_Objects are
// inline objects. CPDF_Object represent that by using an object number of 0.
class CPDF_Object : public Retainable { … };

template <typename T>
struct CanInternStrings { … };

#endif  // CORE_FPDFAPI_PARSER_CPDF_OBJECT_H_