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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/DeprecatedFlyString.h>
- #include <AK/Format.h>
- #include <AK/RefCounted.h>
- #include <AK/SourceLocation.h>
- #include <LibPDF/Error.h>
- #include <LibPDF/Forward.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
- )
- 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&>(*this));
- }
- virtual char const* type_name() const = 0;
- virtual DeprecatedString to_deprecated_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_deprecated_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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