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LibWeb: Add initial implementation of IntersectionObserver

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The main missing features are rootMargin, proper nested browsing
context support and content clip/clip-path support.

This makes images appear on some sites, such as YouTube and
howstuffworks.com.
This commit is contained in:
Luke Wilde 2023-07-06 23:44:07 +01:00 • committed by Andreas Kling
parent 6f8afd8cd9
commit 165abafb80
16 changed files with 664 additions and 22 deletions
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57
Userland/Libraries/LibWeb/IntersectionObserver/IntersectionObserverEntry.cpp Normal file
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/*
* Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/IntersectionObserver/IntersectionObserverEntry.h>
namespace Web::IntersectionObserver {
WebIDL::ExceptionOr<JS::NonnullGCPtr<IntersectionObserverEntry>> IntersectionObserverEntry::construct_impl(JS::Realm& realm, Web::IntersectionObserver::IntersectionObserverEntryInit const& options)
{
auto& vm = realm.vm();
JS::GCPtr<Geometry::DOMRectReadOnly> root_bounds;
if (options.root_bounds.has_value())
root_bounds = TRY(Geometry::DOMRectReadOnly::from_rect(vm, options.root_bounds.value()));
auto bounding_client_rect = TRY(Geometry::DOMRectReadOnly::from_rect(vm, options.bounding_client_rect));
auto intersection_rect = TRY(Geometry::DOMRectReadOnly::from_rect(vm, options.intersection_rect));
return MUST_OR_THROW_OOM(realm.heap().allocate<IntersectionObserverEntry>(realm, realm, options.time, root_bounds, bounding_client_rect, intersection_rect, options.is_intersecting, options.intersection_ratio, *options.target));
}
IntersectionObserverEntry::IntersectionObserverEntry(JS::Realm& realm, HighResolutionTime::DOMHighResTimeStamp time, JS::GCPtr<Geometry::DOMRectReadOnly> root_bounds, JS::NonnullGCPtr<Geometry::DOMRectReadOnly> bounding_client_rect, JS::NonnullGCPtr<Geometry::DOMRectReadOnly> intersection_rect, bool is_intersecting, double intersection_ratio, JS::NonnullGCPtr<DOM::Element> target)
: Bindings::PlatformObject(realm)
, m_time(time)
, m_root_bounds(root_bounds)
, m_bounding_client_rect(bounding_client_rect)
, m_intersection_rect(intersection_rect)
, m_is_intersecting(is_intersecting)
, m_intersection_ratio(intersection_ratio)
, m_target(target)
{
}
IntersectionObserverEntry::~IntersectionObserverEntry() = default;
JS::ThrowCompletionOr<void> IntersectionObserverEntry::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
set_prototype(&Bindings::ensure_web_prototype<Bindings::IntersectionObserverEntryPrototype>(realm, "IntersectionObserverEntry"));
return {};
}
void IntersectionObserverEntry::visit_edges(JS::Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_root_bounds);
visitor.visit(m_bounding_client_rect);
visitor.visit(m_intersection_rect);
visitor.visit(m_target);
}
}