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// Copyright (c) 2005-2021 Jay Berkenbilt
//
// This file is part of qpdf.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Versions of qpdf prior to version 7 were released under the terms
// of version 2.0 of the Artistic License. At your option, you may
// continue to consider qpdf to be licensed under those terms. Please
// see the manual for additional information.
#ifndef QPDFOBJECT_HH
#define QPDFOBJECT_HH
#include <qpdf/DLL.h>
#include <qpdf/Types.h>
#include <qpdf/JSON.hh>
#include <qpdf/Constants.h>
#include <string>
class QPDF;
class QPDFObjectHandle;
class QPDF_DLL_CLASS QPDFObject
{
public:
QPDFObject();
// Objects derived from QPDFObject are accessible through
// QPDFObjectHandle. Each object returns a unique type code that
// has one of the valid qpdf_object_type_e values. As new object
// types are added to qpdf, additional items may be added to the
// list, so code that switches on these values should take that
// into consideration.
// Prior to qpdf 10.5, qpdf_object_type_e was
// QPDFObject::object_type_e but was moved to make it accessible
// to the C API. The code below is for backward compatibility.
typedef enum qpdf_object_type_e object_type_e;
static constexpr object_type_e ot_uninitialized = ::qpdf_ot_uninitialized;
static constexpr object_type_e ot_reserved = ::qpdf_ot_reserved;
static constexpr object_type_e ot_null = ::qpdf_ot_null;
static constexpr object_type_e ot_boolean = ::qpdf_ot_boolean;
static constexpr object_type_e ot_integer = ::qpdf_ot_integer;
static constexpr object_type_e ot_real = ::qpdf_ot_real;
static constexpr object_type_e ot_string = ::qpdf_ot_string;
static constexpr object_type_e ot_name = ::qpdf_ot_name;
static constexpr object_type_e ot_array = ::qpdf_ot_array;
static constexpr object_type_e ot_dictionary = ::qpdf_ot_dictionary;
static constexpr object_type_e ot_stream = ::qpdf_ot_stream;
static constexpr object_type_e ot_operator = ::qpdf_ot_operator;
static constexpr object_type_e ot_inlineimage = ::qpdf_ot_inlineimage;
virtual ~QPDFObject() {}
virtual std::string unparse() = 0;
virtual JSON getJSON() = 0;
// Return a unique type code for the object
virtual object_type_e getTypeCode() const = 0;
// Return a string literal that describes the type, useful for
// debugging and testing
virtual char const* getTypeName() const = 0;
// Accessor to give specific access to non-public methods
class ObjAccessor
{
friend class QPDF;
friend class QPDFObjectHandle;
private:
static void releaseResolved(QPDFObject* o)
{
if (o)
{
o->releaseResolved();
}
}
};
friend class ObjAccessor;
virtual void setDescription(QPDF*, std::string const&);
bool getDescription(QPDF*&, std::string&);
bool hasDescription();
void setParsedOffset(qpdf_offset_t offset);
qpdf_offset_t getParsedOffset();
protected:
virtual void releaseResolved() {}
private:
QPDFObject(QPDFObject const&) = delete;
QPDFObject& operator=(QPDFObject const&) = delete;
QPDF* owning_qpdf;
std::string object_description;
qpdf_offset_t parsed_offset;
};
#endif // QPDFOBJECT_HH
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