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. :^)
88 lines
3.8 KiB
C++
88 lines
3.8 KiB
C++
/*
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* Copyright (c) 2021, Tim Flynn <trflynn89@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 <LibJS/Heap/Handle.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/IntersectionObserver/IntersectionObserverEntry.h>
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#include <LibWeb/PixelUnits.h>
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namespace Web::IntersectionObserver {
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struct IntersectionObserverInit {
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Optional<Variant<JS::Handle<DOM::Element>, JS::Handle<DOM::Document>>> root;
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String root_margin { "0px"_string };
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Variant<double, Vector<double>> threshold { 0 };
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};
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// https://www.w3.org/TR/intersection-observer/#intersectionobserverregistration
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struct IntersectionObserverRegistration {
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserverregistration-observer
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// [A]n observer property holding an IntersectionObserver.
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JS::NonnullGCPtr<IntersectionObserver> observer;
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserverregistration-observer
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// NOTE: Optional is used in place of the spec using -1 to indicate no previous index.
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// [A] previousThresholdIndex property holding a number between -1 and the length of the observer’s thresholds property (inclusive).
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Optional<size_t> previous_threshold_index;
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserverregistration-previousisintersecting
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// [A] previousIsIntersecting property holding a boolean.
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bool previous_is_intersecting { false };
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};
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// https://w3c.github.io/IntersectionObserver/#intersection-observer-interface
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class IntersectionObserver final : public Bindings::PlatformObject {
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WEB_PLATFORM_OBJECT(IntersectionObserver, Bindings::PlatformObject);
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JS_DECLARE_ALLOCATOR(IntersectionObserver);
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public:
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<IntersectionObserver>> construct_impl(JS::Realm&, JS::GCPtr<WebIDL::CallbackType> callback, IntersectionObserverInit const& options = {});
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virtual ~IntersectionObserver() override;
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void observe(DOM::Element& target);
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void unobserve(DOM::Element& target);
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void disconnect();
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Vector<JS::Handle<IntersectionObserverEntry>> take_records();
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Vector<JS::NonnullGCPtr<DOM::Element>> const& observation_targets() const { return m_observation_targets; }
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Variant<JS::Handle<DOM::Element>, JS::Handle<DOM::Document>, Empty> root() const;
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Vector<double> const& thresholds() const { return m_thresholds; }
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Variant<JS::Handle<DOM::Element>, JS::Handle<DOM::Document>> intersection_root() const;
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CSSPixelRect root_intersection_rectangle() const;
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void queue_entry(Badge<DOM::Document>, JS::NonnullGCPtr<IntersectionObserverEntry>);
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WebIDL::CallbackType& callback() { return *m_callback; }
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private:
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explicit IntersectionObserver(JS::Realm&, JS::GCPtr<WebIDL::CallbackType> callback, Optional<Variant<JS::Handle<DOM::Element>, JS::Handle<DOM::Document>>> const& root, Vector<double>&& thresholds);
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virtual void initialize(JS::Realm&) override;
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virtual void visit_edges(JS::Cell::Visitor&) override;
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virtual void finalize() override;
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserver-callback-slot
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JS::GCPtr<WebIDL::CallbackType> m_callback;
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserver-root
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Optional<Variant<JS::Handle<DOM::Element>, JS::Handle<DOM::Document>>> m_root;
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserver-thresholds
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Vector<double> m_thresholds;
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserver-queuedentries-slot
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Vector<JS::NonnullGCPtr<IntersectionObserverEntry>> m_queued_entries;
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// https://www.w3.org/TR/intersection-observer/#dom-intersectionobserver-observationtargets-slot
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Vector<JS::NonnullGCPtr<DOM::Element>> m_observation_targets;
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};
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}
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