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https://github.com/LadybirdBrowser/ladybird.git
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64abc6101d
Our structured serialization implementation had its own bespoke encoder and decoder to serialize JS values. It also used a u32 buffer under the hood, which made using its structures a bit awkward. We had previously worked around its data structures in transferable streams, which nested transfers of MessagePort instances. We basically had to add hooks into the MessagePort to route to the correct transfer receiving steps, and we could not invoke the correct AOs directly as the spec dictates. We now use IPC mechanics to encode and decode data. This works because, although we are encoding JS values, we are only ultimately encoding primitive and basic AK types. The resulting data structures actually enforce that we implement transferable streams exactly as the spec is worded (I had planned to do that in a separate commit, but the fallout of this patch actually required that change).
162 lines
6.4 KiB
C++
162 lines
6.4 KiB
C++
/*
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* Copyright (c) 2021-2022, Linus Groh <linusg@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/Diagnostics.h>
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#include <AK/String.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/Bindings/Serializable.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/HTML/Scripting/Environments.h>
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namespace Web::WebIDL {
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// The following have a legacy code value but *don't* produce it as
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// DOMException.code value when used as name (and are therefore omitted here):
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// - DOMStringSizeError (DOMSTRING_SIZE_ERR = 2)
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// - NoDataAllowedError (NO_DATA_ALLOWED_ERR = 6)
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// - ValidationError (VALIDATION_ERR = 16)
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#define ENUMERATE_DOM_EXCEPTION_LEGACY_CODES \
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__ENUMERATE(IndexSizeError, 1) \
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__ENUMERATE(HierarchyRequestError, 3) \
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__ENUMERATE(WrongDocumentError, 4) \
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__ENUMERATE(InvalidCharacterError, 5) \
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__ENUMERATE(NoModificationAllowedError, 7) \
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__ENUMERATE(NotFoundError, 8) \
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__ENUMERATE(NotSupportedError, 9) \
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__ENUMERATE(InUseAttributeError, 10) \
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__ENUMERATE(InvalidStateError, 11) \
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__ENUMERATE(SyntaxError, 12) \
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__ENUMERATE(InvalidModificationError, 13) \
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__ENUMERATE(NamespaceError, 14) \
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__ENUMERATE(InvalidAccessError, 15) \
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__ENUMERATE(TypeMismatchError, 17) \
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__ENUMERATE(SecurityError, 18) \
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__ENUMERATE(NetworkError, 19) \
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__ENUMERATE(AbortError, 20) \
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__ENUMERATE(URLMismatchError, 21) \
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__ENUMERATE(QuotaExceededError, 22) \
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__ENUMERATE(TimeoutError, 23) \
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__ENUMERATE(InvalidNodeTypeError, 24) \
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__ENUMERATE(DataCloneError, 25)
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// https://webidl.spec.whatwg.org/#idl-DOMException-error-names
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// Same order as in the spec document, also matches the legacy codes order above.
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#define ENUMERATE_DOM_EXCEPTION_ERROR_NAMES \
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__ENUMERATE(IndexSizeError) /* Deprecated */ \
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__ENUMERATE(HierarchyRequestError) \
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__ENUMERATE(WrongDocumentError) \
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__ENUMERATE(InvalidCharacterError) \
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__ENUMERATE(NoModificationAllowedError) \
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__ENUMERATE(NotFoundError) \
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__ENUMERATE(NotSupportedError) \
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__ENUMERATE(InUseAttributeError) \
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__ENUMERATE(InvalidStateError) \
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__ENUMERATE(SyntaxError) \
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__ENUMERATE(InvalidModificationError) \
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__ENUMERATE(NamespaceError) \
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__ENUMERATE(InvalidAccessError) /* Deprecated */ \
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__ENUMERATE(TypeMismatchError) /* Deprecated */ \
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__ENUMERATE(SecurityError) \
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__ENUMERATE(NetworkError) \
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__ENUMERATE(AbortError) \
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__ENUMERATE(URLMismatchError) \
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__ENUMERATE(QuotaExceededError) \
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__ENUMERATE(TimeoutError) \
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__ENUMERATE(InvalidNodeTypeError) \
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__ENUMERATE(DataCloneError) \
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__ENUMERATE(EncodingError) \
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__ENUMERATE(NotReadableError) \
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__ENUMERATE(UnknownError) \
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__ENUMERATE(ConstraintError) \
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__ENUMERATE(DataError) \
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__ENUMERATE(TransactionInactiveError) \
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__ENUMERATE(ReadOnlyError) \
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__ENUMERATE(VersionError) \
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__ENUMERATE(OperationError) \
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__ENUMERATE(NotAllowedError)
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static u16 get_legacy_code_for_name(FlyString const& name)
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{
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#define __ENUMERATE(ErrorName, code) \
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if (name == #ErrorName) \
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return code;
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ENUMERATE_DOM_EXCEPTION_LEGACY_CODES
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#undef __ENUMERATE
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return 0;
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}
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// https://webidl.spec.whatwg.org/#idl-DOMException
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class DOMException final
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: public Bindings::PlatformObject
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, public Bindings::Serializable {
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WEB_PLATFORM_OBJECT(DOMException, Bindings::PlatformObject);
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GC_DECLARE_ALLOCATOR(DOMException);
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public:
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static GC::Ref<DOMException> create(JS::Realm& realm, FlyString name, String message);
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static GC::Ref<DOMException> create(JS::Realm& realm);
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// JS constructor has message first, name second
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// FIXME: This is a completely pointless footgun, let's use the same order for both factories.
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static GC::Ref<DOMException> construct_impl(JS::Realm& realm, String message, FlyString name);
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virtual ~DOMException() override;
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FlyString const& name() const { return m_name; }
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FlyString const& message() const { return m_message; }
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u16 code() const { return get_legacy_code_for_name(m_name); }
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virtual HTML::SerializeType serialize_type() const override { return HTML::SerializeType::DOMException; }
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virtual WebIDL::ExceptionOr<void> serialization_steps(HTML::TransferDataEncoder&, bool for_storage, HTML::SerializationMemory&) override;
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virtual WebIDL::ExceptionOr<void> deserialization_steps(HTML::TransferDataDecoder&, HTML::DeserializationMemory&) override;
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protected:
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DOMException(JS::Realm&, FlyString name, String message);
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explicit DOMException(JS::Realm&);
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virtual void initialize(JS::Realm&) override;
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private:
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FlyString m_name;
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FlyString m_message;
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};
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#define __ENUMERATE(ErrorName) \
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class ErrorName final { \
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public: \
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static GC::Ref<DOMException> create(JS::Realm& realm, String const& message) \
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{ \
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return DOMException::create(realm, #ErrorName##_fly_string, message); \
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} \
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};
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ENUMERATE_DOM_EXCEPTION_ERROR_NAMES
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#undef __ENUMERATE
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}
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namespace Web {
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inline JS::Completion throw_completion(GC::Ref<WebIDL::DOMException> exception)
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{
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return JS::throw_completion(JS::Value(exception));
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}
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}
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namespace AK {
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template<>
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struct Formatter<Web::WebIDL::DOMException> : Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, Web::WebIDL::DOMException const& exception)
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{
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return Formatter<FormatString>::format(builder, "[{}]: {}"sv, exception.name(), exception.message());
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}
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};
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}
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