1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-29 20:35:13 +00:00
serenity/Userland/Libraries/LibPDF/Object.h
Matthew Olsson a8f5b6aaa3 LibPDF: Create basic object structure
This commit is the start of LibPDF, and introduces some basic structure
objects. This emulates LibJS's Value structure, where Value is a simple
class that can contain a pointer to a more complex Object class with
more data. All of the basic PDF objects have a representation.
2021-05-10 10:32:39 +02:00

193 lines
4.7 KiB
C++

/*
* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FlyString.h>
#include <AK/Format.h>
#include <AK/HashMap.h>
#include <AK/RefCounted.h>
#include <LibPDF/Forward.h>
#include <LibPDF/Value.h>
namespace PDF {
class Object : public RefCounted<Object> {
public:
virtual ~Object() = default;
[[nodiscard]] ALWAYS_INLINE u32 generation_index() const { return m_generation_index; }
ALWAYS_INLINE void set_generation_index(u32 generation_index) { m_generation_index = generation_index; }
#define DEFINE_ID(_, name) \
virtual bool is_##name() const { return false; }
ENUMERATE_OBJECT_TYPES(DEFINE_ID)
#undef DEFINE_ID
virtual String to_string(int indent) const = 0;
private:
u32 m_generation_index { 0 };
};
class StringObject final : public Object {
public:
StringObject(String string, bool is_binary)
: m_string(move(string))
, m_is_binary(is_binary)
{
}
~StringObject() override = default;
[[nodiscard]] ALWAYS_INLINE const String& string() const { return m_string; }
[[nodiscard]] ALWAYS_INLINE bool is_binary() const { return m_is_binary; }
ALWAYS_INLINE bool is_string() const override { return true; }
String to_string(int indent) const override;
private:
String m_string;
bool m_is_binary;
};
class NameObject final : public Object {
public:
explicit NameObject(FlyString name)
: m_name(move(name))
{
}
~NameObject() override = default;
[[nodiscard]] ALWAYS_INLINE FlyString name() const { return m_name; }
ALWAYS_INLINE bool is_name() const override { return true; }
String to_string(int indent) const override;
private:
FlyString m_name;
};
class ArrayObject final : public Object {
public:
explicit ArrayObject(Vector<Value> elements)
: m_elements(move(elements))
{
}
~ArrayObject() override = default;
[[nodiscard]] ALWAYS_INLINE Vector<Value> elements() const { return m_elements; }
ALWAYS_INLINE bool is_array() const override { return true; }
String to_string(int indent) const override;
private:
Vector<Value> m_elements;
};
class DictObject final : public Object {
public:
explicit DictObject(HashMap<FlyString, Value> map)
: m_map(move(map))
{
}
~DictObject() override = default;
[[nodiscard]] ALWAYS_INLINE HashMap<FlyString, Value> map() const { return m_map; }
ALWAYS_INLINE bool is_dict() const override { return true; }
String to_string(int indent) const override;
private:
HashMap<FlyString, Value> m_map;
};
class StreamObject final : public Object {
public:
StreamObject(const NonnullRefPtr<DictObject>& dict, const ReadonlyBytes& bytes)
: m_dict(dict)
, m_bytes(bytes)
{
}
~StreamObject() override = default;
[[nodiscard]] ALWAYS_INLINE NonnullRefPtr<DictObject> dict() const { return m_dict; }
[[nodiscard]] ALWAYS_INLINE const ReadonlyBytes& bytes() const { return m_bytes; }
ALWAYS_INLINE bool is_stream() const override { return true; }
String to_string(int indent) const override;
private:
NonnullRefPtr<DictObject> m_dict;
ReadonlyBytes m_bytes;
};
class IndirectValue final : public Object {
public:
IndirectValue(u32 index, u32 generation_index, const Value& value)
: m_index(index)
, m_value(value)
{
set_generation_index(generation_index);
}
~IndirectValue() override = default;
[[nodiscard]] ALWAYS_INLINE u32 index() const { return m_index; }
[[nodiscard]] ALWAYS_INLINE const Value& value() const { return m_value; }
ALWAYS_INLINE bool is_indirect_value() const override { return true; }
String to_string(int indent) const override;
private:
u32 m_index;
Value m_value;
};
class IndirectValueRef final : public Object {
public:
IndirectValueRef(u32 index, u32 generation_index)
: m_index(index)
{
set_generation_index(generation_index);
}
~IndirectValueRef() override = default;
[[nodiscard]] ALWAYS_INLINE u32 index() const { return m_index; }
ALWAYS_INLINE bool is_indirect_value_ref() const override { return true; }
String to_string(int indent) const override;
private:
u32 m_index;
};
}
namespace AK {
template<PDF::IsObject T>
struct Formatter<T> : Formatter<StringView> {
void format(FormatBuilder& builder, const T& object)
{
Formatter<StringView>::format(builder, object.to_string(0));
}
};
template<PDF::IsObject T>
struct Formatter<NonnullRefPtr<T>> : Formatter<T> {
void format(FormatBuilder& builder, const NonnullRefPtr<T>& object)
{
Formatter<T>::format(builder, *object);
}
};
}