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/*
* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
* Copyright (c) 2022, Andreas Kling <kling@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/DOM/MutationRecord.h>
#include <LibWeb/WebIDL/CallbackType.h>
#include <LibWeb/WebIDL/ExceptionOr.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<DeprecatedString>> attribute_filter;
};
// https://dom.spec.whatwg.org/#mutationobserver
class MutationObserver final : public Bindings::PlatformObject {
WEB_PLATFORM_OBJECT(MutationObserver, Bindings::PlatformObject);
public:
static JS::NonnullGCPtr<MutationObserver> construct_impl(JS::Realm&, JS::GCPtr<WebIDL::CallbackType>);
virtual ~MutationObserver() override;
WebIDL::ExceptionOr<void> observe(Node& target, MutationObserverInit options = {});
void disconnect();
Vector<JS::Handle<MutationRecord>> take_records();
Vector<WeakPtr<Node>>& node_list() { return m_node_list; }
Vector<WeakPtr<Node>> const& node_list() const { return m_node_list; }
WebIDL::CallbackType& callback() { return *m_callback; }
void enqueue_record(Badge<Node>, JS::NonnullGCPtr<MutationRecord> mutation_record)
{
m_record_queue.append(*mutation_record);
}
private:
MutationObserver(JS::Realm&, JS::GCPtr<WebIDL::CallbackType>);
virtual void initialize(JS::Realm&) override;
virtual void visit_edges(Cell::Visitor&) override;
// https://dom.spec.whatwg.org/#concept-mo-callback
JS::GCPtr<WebIDL::CallbackType> m_callback;
// https://dom.spec.whatwg.org/#mutationobserver-node-list
// NOTE: These are weak, per https://dom.spec.whatwg.org/#garbage-collection
// Registered observers in a node’s registered observer list have a weak reference to the node.
Vector<WeakPtr<Node>> m_node_list;
// https://dom.spec.whatwg.org/#concept-mo-queue
Vector<JS::NonnullGCPtr<MutationRecord>> m_record_queue;
};
// https://dom.spec.whatwg.org/#registered-observer
class RegisteredObserver : public JS::Cell {
JS_CELL(RegisteredObserver, JS::Cell);
public:
static JS::NonnullGCPtr<RegisteredObserver> create(MutationObserver&, MutationObserverInit const&);
virtual ~RegisteredObserver() override;
JS::NonnullGCPtr<MutationObserver> observer() const { return m_observer; }
MutationObserverInit const& options() const { return m_options; }
void set_options(MutationObserverInit options) { m_options = move(options); }
protected:
RegisteredObserver(MutationObserver& observer, MutationObserverInit const& options);
virtual void visit_edges(Cell::Visitor&) override;
private:
JS::NonnullGCPtr<MutationObserver> m_observer;
MutationObserverInit m_options;
};
// https://dom.spec.whatwg.org/#transient-registered-observer
class TransientRegisteredObserver final : public RegisteredObserver {
JS_CELL(TransientRegisteredObserver, RegisteredObserver);
public:
static JS::NonnullGCPtr<TransientRegisteredObserver> create(MutationObserver&, MutationObserverInit const&, RegisteredObserver& source);
virtual ~TransientRegisteredObserver() override;
JS::NonnullGCPtr<RegisteredObserver> source() const { return m_source; }
private:
TransientRegisteredObserver(MutationObserver& observer, MutationObserverInit const& options, RegisteredObserver& source);
virtual void visit_edges(Cell::Visitor&) override;
JS::NonnullGCPtr<RegisteredObserver> m_source;
};
}
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