mirror of
https://github.com/RGBCube/serenity
synced 2025-05-29 06:45:08 +00:00

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.
193 lines
4.7 KiB
C++
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);
|
|
}
|
|
};
|
|
|
|
}
|