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/*
* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullRefPtrVector.h>
#include <AK/RefCounted.h>
#include <LibJS/Heap/Handle.h>
#include <LibWeb/Bindings/CallbackType.h>
#include <LibWeb/Bindings/Wrappable.h>
#include <LibWeb/DOM/ExceptionOr.h>
#include <LibWeb/DOM/MutationRecord.h>
namespace Web::DOM {
// https://dom.spec.whatwg.org/#dictdef-mutationobserverinit
struct MutationObserverInit {
bool child_list { false };
Optional<bool> attributes;
Optional<bool> character_data;
bool subtree { false };
Optional<bool> attribute_old_value;
Optional<bool> character_data_old_value;
Optional<Vector<String>> attribute_filter;
};
// https://dom.spec.whatwg.org/#mutationobserver
class MutationObserver final
: public RefCounted<MutationObserver>
, public Bindings::Wrappable {
public:
using WrapperType = Bindings::MutationObserverWrapper;
static NonnullRefPtr<MutationObserver> create_with_global_object(Bindings::WindowObject& window_object, Bindings::CallbackType callback)
{
return adopt_ref(*new MutationObserver(window_object, move(callback)));
}
virtual ~MutationObserver() override = default;
ExceptionOr<void> observe(Node& target, MutationObserverInit options = {});
void disconnect();
NonnullRefPtrVector<MutationRecord> take_records();
Vector<WeakPtr<Node>>& node_list() { return m_node_list; }
Vector<WeakPtr<Node>> const& node_list() const { return m_node_list; }
Bindings::CallbackType& callback() { return m_callback; }
void enqueue_record(Badge<Node>, NonnullRefPtr<MutationRecord> mutation_record)
{
m_record_queue.append(move(mutation_record));
}
private:
MutationObserver(Bindings::WindowObject& window_object, Bindings::CallbackType callback);
// https://dom.spec.whatwg.org/#concept-mo-callback
Bindings::CallbackType m_callback;
// https://dom.spec.whatwg.org/#mutationobserver-node-list
Vector<WeakPtr<Node>> m_node_list;
// https://dom.spec.whatwg.org/#concept-mo-queue
NonnullRefPtrVector<MutationRecord> m_record_queue;
};
// https://dom.spec.whatwg.org/#registered-observer
struct RegisteredObserver : public RefCounted<RegisteredObserver> {
static NonnullRefPtr<RegisteredObserver> create(MutationObserver& observer, MutationObserverInit& options)
{
return adopt_ref(*new RegisteredObserver(observer, options));
}
RegisteredObserver(MutationObserver& observer, MutationObserverInit& options)
: observer(observer)
, options(options)
{
}
virtual ~RegisteredObserver() = default;
NonnullRefPtr<MutationObserver> observer;
MutationObserverInit options;
};
// https://dom.spec.whatwg.org/#transient-registered-observer
struct TransientRegisteredObserver final : public RegisteredObserver {
static NonnullRefPtr<TransientRegisteredObserver> create(MutationObserver& observer, MutationObserverInit& options, RegisteredObserver& source)
{
return adopt_ref(*new TransientRegisteredObserver(observer, options, source));
}
TransientRegisteredObserver(MutationObserver& observer, MutationObserverInit& options, RegisteredObserver& source)
: RegisteredObserver(observer, options)
, source(source)
{
}
virtual ~TransientRegisteredObserver() override = default;
NonnullRefPtr<RegisteredObserver> source;
};
}
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