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