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/*
* Copyright (c) 2021-2022, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Debug.h>
#include <AK/FlyString.h>
#include <AK/Format.h>
#include <AK/RefCounted.h>
#include <AK/SourceLocation.h>
#include <LibPDF/Error.h>
#include <LibPDF/Forward.h>
#include <LibPDF/Value.h>
#ifdef PDF_DEBUG
namespace {
template<PDF::IsObject T>
char const* object_name()
{
# define ENUMERATE_TYPE(class_name, snake_name) \
if constexpr (IsSame<PDF::class_name, T>) { \
return #class_name; \
}
ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPE)
# undef ENUMERATE_TYPE
VERIFY_NOT_REACHED();
}
}
#endif
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; }
template<IsObject T>
bool is() const requires(!IsSame<T, Object>)
{
#define ENUMERATE_TYPE(class_name, snake_name) \
if constexpr (IsSame<class_name, T>) { \
return is_##snake_name(); \
}
ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPE)
#undef ENUMERATE_TYPE
VERIFY_NOT_REACHED();
}
template<IsObject T>
[[nodiscard]] ALWAYS_INLINE NonnullRefPtr<T> cast(
#ifdef PDF_DEBUG
SourceLocation loc = SourceLocation::current()
#endif
) const requires(!IsSame<T, Object>)
{
#ifdef PDF_DEBUG
if (!is<T>()) {
dbgln("{} invalid cast from {} to {}", loc, type_name(), object_name<T>());
VERIFY_NOT_REACHED();
}
#endif
return NonnullRefPtr<T>(static_cast<T const&>(*this));
}
virtual char const* type_name() const = 0;
virtual String to_string(int indent) const = 0;
protected:
#define ENUMERATE_TYPE(_, name) \
virtual bool is_##name() const { return false; }
ENUMERATE_OBJECT_TYPES(ENUMERATE_TYPE)
#undef ENUMERATE_TYPE
private:
u32 m_generation_index { 0 };
};
}
namespace AK {
template<PDF::IsObject T>
struct Formatter<T> : Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, T const& object)
{
return Formatter<StringView>::format(builder, object.to_string(0));
}
};
template<PDF::IsObject T>
struct Formatter<NonnullRefPtr<T>> : Formatter<T> {
ErrorOr<void> format(FormatBuilder& builder, NonnullRefPtr<T> const& object)
{
return Formatter<T>::format(builder, *object);
}
};
}
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