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LibWeb: Introduce Mutation{Record,Observer} and observer microtasks

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Luke Wilde 2022-07-11 16:37:51 +01:00 • committed by Andreas Kling
parent 116a7b74fe
commit c9ba5531e0
15 changed files with 531 additions and 0 deletions
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38
Userland/Libraries/LibWeb/DOM/MutationRecord.h Normal file
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/*
* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/RefCounted.h>
#include <LibWeb/Bindings/Wrappable.h>
namespace Web::DOM {
// https://dom.spec.whatwg.org/#mutationrecord
// NOTE: This is implemented as a pure virtual interface with the actual implementation in the CPP file to prevent this circular dependency: Node.h -> MutationRecord.h -> MutationObserver.h -> Node.h
// This is also why this uses raw pointers and references, since using (NN)RP requires us to include the templated type, even in a header specifying a function return type.
class MutationRecord
: public RefCounted<MutationRecord>
, public Bindings::Wrappable {
public:
using WrapperType = Bindings::MutationRecordWrapper;
static NonnullRefPtr<MutationRecord> create(FlyString const& type, Node& target, NodeList& added_nodes, NodeList& removed_nodes, Node* previous_sibling, Node* next_sibling, String const& attribute_name, String const& attribute_namespace, String const& old_value);
virtual ~MutationRecord() override = default;
virtual FlyString const& type() const = 0;
virtual Node const* target() const = 0;
virtual NodeList const* added_nodes() const = 0;
virtual NodeList const* removed_nodes() const = 0;
virtual Node const* previous_sibling() const = 0;
virtual Node const* next_sibling() const = 0;
virtual String const& attribute_name() const = 0;
virtual String const& attribute_namespace() const = 0;
virtual String const& old_value() const = 0;
};
}