32 lines
1.1 KiB
C
32 lines
1.1 KiB
C
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/*
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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 <AK/Optional.h>
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#include <LibGC/Ptr.h>
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#include <LibWeb/Forward.h>
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namespace Web::IntersectionObserver {
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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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GC::Ref<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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}
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