mirror of
https://github.com/LadybirdBrowser/ladybird.git
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a6dfc74e93
Before this change, we were going through the chain of base classes for each IDL interface object and having them set the prototype to their prototype. Instead of doing that, reorder things so that we set the right prototype immediately in Foo::initialize(), and then don't bother in all the base class overrides. This knocks off a ~1% profile item on Speedometer 3.
115 lines
3.9 KiB
C++
115 lines
3.9 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/ResizeObserverPrototype.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/HTML/Scripting/ExceptionReporter.h>
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#include <LibWeb/HTML/Window.h>
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#include <LibWeb/ResizeObserver/ResizeObserver.h>
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#include <LibWeb/WebIDL/AbstractOperations.h>
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namespace Web::ResizeObserver {
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GC_DEFINE_ALLOCATOR(ResizeObserver);
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// https://drafts.csswg.org/resize-observer/#dom-resizeobserver-resizeobserver
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WebIDL::ExceptionOr<GC::Ref<ResizeObserver>> ResizeObserver::construct_impl(JS::Realm& realm, WebIDL::CallbackType* callback)
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{
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return realm.create<ResizeObserver>(realm, callback);
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}
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ResizeObserver::ResizeObserver(JS::Realm& realm, WebIDL::CallbackType* callback)
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: PlatformObject(realm)
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, m_callback(callback)
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{
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auto navigable = as<HTML::Window>(HTML::relevant_global_object(*this)).navigable();
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m_document = navigable->active_document().ptr();
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m_document->register_resize_observer({}, *this);
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}
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ResizeObserver::~ResizeObserver() = default;
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void ResizeObserver::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(ResizeObserver);
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Base::initialize(realm);
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}
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void ResizeObserver::visit_edges(JS::Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_callback);
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visitor.visit(m_observation_targets);
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visitor.visit(m_active_targets);
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visitor.visit(m_skipped_targets);
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}
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void ResizeObserver::finalize()
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{
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if (m_document)
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m_document->unregister_resize_observer({}, *this);
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}
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// https://drafts.csswg.org/resize-observer-1/#dom-resizeobserver-observe
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void ResizeObserver::observe(DOM::Element& target, ResizeObserverOptions options)
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{
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// 1. If target is in [[observationTargets]] slot, call unobserve() with argument target.
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auto observation = m_observation_targets.find_if([&](auto& observation) { return observation->target().ptr() == ⌖ });
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if (!observation.is_end())
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unobserve(target);
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// 2. Let observedBox be the value of the box dictionary member of options.
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auto observed_box = options.box;
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// 3. Let resizeObservation be new ResizeObservation(target, observedBox).
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auto resize_observation = MUST(ResizeObservation::create(realm(), target, observed_box));
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// 4. Add the resizeObservation to the [[observationTargets]] slot.
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m_observation_targets.append(resize_observation);
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}
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// https://drafts.csswg.org/resize-observer-1/#dom-resizeobserver-unobserve
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void ResizeObserver::unobserve(DOM::Element& target)
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{
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// 1. Let observation be ResizeObservation in [[observationTargets]] whose target slot is target.
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auto observation = m_observation_targets.find_if([&](auto& observation) { return observation->target().ptr() == ⌖ });
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// 2. If observation is not found, return.
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if (observation.is_end())
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return;
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// 3. Remove observation from [[observationTargets]].
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m_observation_targets.remove(observation.index());
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}
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// https://drafts.csswg.org/resize-observer-1/#dom-resizeobserver-disconnect
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void ResizeObserver::disconnect()
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{
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// 1. Clear the [[observationTargets]] list.
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m_observation_targets.clear();
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// 2. Clear the [[activeTargets]] list.
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m_active_targets.clear();
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}
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void ResizeObserver::invoke_callback(ReadonlySpan<GC::Ref<ResizeObserverEntry>> entries) const
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{
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auto& callback = *m_callback;
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auto& realm = callback.callback_context;
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auto wrapped_records = MUST(JS::Array::create(realm, 0));
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for (size_t i = 0; i < entries.size(); ++i) {
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auto& record = entries.at(i);
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auto property_index = JS::PropertyKey { i };
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MUST(wrapped_records->create_data_property(property_index, record.ptr()));
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}
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(void)WebIDL::invoke_callback(callback, JS::js_undefined(), WebIDL::ExceptionBehavior::Report, { { wrapped_records } });
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}
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}
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