bfd354492e
With this change, we now have ~1200 CellAllocators across both LibJS and LibWeb in a normal WebContent instance. This gives us a minimum heap size of 4.7 MiB in the scenario where we only have one cell allocated per type. Of course, in practice there will be many more of each type, so the effective overhead is quite a bit smaller than that in practice. I left a few types unconverted to this mechanism because I got tired of doing this. :^)
111 lines
3.8 KiB
C++
111 lines
3.8 KiB
C++
/*
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* Copyright (c) 2022, Luke Wilde <lukew@serenityos.org>
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* Copyright (c) 2022, Andreas Kling <kling@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/RefCounted.h>
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#include <LibJS/Heap/Handle.h>
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#include <LibWeb/DOM/MutationRecord.h>
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#include <LibWeb/WebIDL/CallbackType.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::DOM {
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// https://dom.spec.whatwg.org/#dictdef-mutationobserverinit
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struct MutationObserverInit {
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bool child_list { false };
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Optional<bool> attributes;
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Optional<bool> character_data;
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bool subtree { false };
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Optional<bool> attribute_old_value;
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Optional<bool> character_data_old_value;
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Optional<Vector<String>> attribute_filter;
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};
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// https://dom.spec.whatwg.org/#mutationobserver
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class MutationObserver final : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(MutationObserver, Bindings::PlatformObject);
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JS_DECLARE_ALLOCATOR(MutationObserver);
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public:
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<MutationObserver>> construct_impl(JS::Realm&, JS::GCPtr<WebIDL::CallbackType>);
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virtual ~MutationObserver() override;
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WebIDL::ExceptionOr<void> observe(Node& target, MutationObserverInit options = {});
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void disconnect();
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Vector<JS::Handle<MutationRecord>> take_records();
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Vector<WeakPtr<Node>>& node_list() { return m_node_list; }
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Vector<WeakPtr<Node>> const& node_list() const { return m_node_list; }
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WebIDL::CallbackType& callback() { return *m_callback; }
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void enqueue_record(Badge<Node>, JS::NonnullGCPtr<MutationRecord> mutation_record)
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{
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m_record_queue.append(*mutation_record);
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}
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private:
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MutationObserver(JS::Realm&, JS::GCPtr<WebIDL::CallbackType>);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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// https://dom.spec.whatwg.org/#concept-mo-callback
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JS::GCPtr<WebIDL::CallbackType> m_callback;
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// https://dom.spec.whatwg.org/#mutationobserver-node-list
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// NOTE: These are weak, per https://dom.spec.whatwg.org/#garbage-collection
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// Registered observers in a node’s registered observer list have a weak reference to the node.
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Vector<WeakPtr<Node>> m_node_list;
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// https://dom.spec.whatwg.org/#concept-mo-queue
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Vector<JS::NonnullGCPtr<MutationRecord>> m_record_queue;
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};
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// https://dom.spec.whatwg.org/#registered-observer
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class RegisteredObserver : public JS::Cell {
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JS_CELL(RegisteredObserver, JS::Cell);
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public:
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static JS::NonnullGCPtr<RegisteredObserver> create(MutationObserver&, MutationObserverInit const&);
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virtual ~RegisteredObserver() override;
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JS::NonnullGCPtr<MutationObserver> observer() const { return m_observer; }
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MutationObserverInit const& options() const { return m_options; }
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void set_options(MutationObserverInit options) { m_options = move(options); }
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protected:
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RegisteredObserver(MutationObserver& observer, MutationObserverInit const& options);
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virtual void visit_edges(Cell::Visitor&) override;
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private:
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JS::NonnullGCPtr<MutationObserver> m_observer;
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MutationObserverInit m_options;
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};
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// https://dom.spec.whatwg.org/#transient-registered-observer
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class TransientRegisteredObserver final : public RegisteredObserver {
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JS_CELL(TransientRegisteredObserver, RegisteredObserver);
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public:
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static JS::NonnullGCPtr<TransientRegisteredObserver> create(MutationObserver&, MutationObserverInit const&, RegisteredObserver& source);
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virtual ~TransientRegisteredObserver() override;
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JS::NonnullGCPtr<RegisteredObserver> source() const { return m_source; }
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private:
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TransientRegisteredObserver(MutationObserver& observer, MutationObserverInit const& options, RegisteredObserver& source);
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virtual void visit_edges(Cell::Visitor&) override;
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JS::NonnullGCPtr<RegisteredObserver> m_source;
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};
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}
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