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LibWeb: Define PerformanceEventTiming

Browse source 
https://www.w3.org/TR/event-timing/#sec-performance-event-timing

Add idl, header and stubs for PerformanceEventTiming interface.

Two missing `PerformanceEntry` types that have come up in issues
are the `first-input` and the `event` entryTypes. Those are both
this.

Also, because both of those are this same interface, the static
methods from the parent class are difficult to implement because
of instance-specific details. Might either need subclasses or to
edit the parent and also everything that inherits from it :/
This commit is contained in:
Noah Bright 2024-09-22 15:12:55 -04:00 • committed by Alexander Kalenik
commit d30ae92b82
Notes: github-actions[bot] 2024-10-08 01:45:50 +00:00
8 changed files with 217 additions and 0 deletions
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66
Userland/Libraries/LibWeb/EventTiming/PerformanceEventTiming.h Normal file
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/*
* Copyright (c) 2024, Noah Bright <noah.bright.1@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/DOM/Node.h>
#include <LibWeb/PerformanceTimeline/PerformanceEntry.h>
namespace Web::EventTiming {
// https://www.w3.org/TR/event-timing/#sec-performance-event-timing
class PerformanceEventTiming final : public PerformanceTimeline::PerformanceEntry {
WEB_PLATFORM_OBJECT(PerformanceEventTiming, PerformanceTimeline::PerformanceEntry);
JS_DECLARE_ALLOCATOR(PerformanceEventTiming);
public:
virtual ~PerformanceEventTiming();
HighResolutionTime::DOMHighResTimeStamp processing_start() const;
HighResolutionTime::DOMHighResTimeStamp processing_end() const;
bool cancelable() const;
JS::ThrowCompletionOr<JS::GCPtr<DOM::Node>> target();
unsigned long long interaction_id();
// from the registry:
// https://w3c.github.io/timing-entrytypes-registry/#dfn-availablefromtimeline
static PerformanceTimeline::AvailableFromTimeline available_from_timeline();
// https://w3c.github.io/timing-entrytypes-registry/#dfn-maxbuffersize
static Optional<u64> max_buffer_size();
// https://w3c.github.io/timing-entrytypes-registry/#dfn-should-add-entry
virtual PerformanceTimeline::ShouldAddEntry should_add_entry(Optional<PerformanceTimeline::PerformanceObserverInit const&> = {}) const override;
virtual FlyString const& entry_type() const override;
private:
PerformanceEventTiming(JS::Realm& realm, String const& name, HighResolutionTime::DOMHighResTimeStamp start_time, HighResolutionTime::DOMHighResTimeStamp duration,
DOM::Event const& event, HighResolutionTime::DOMHighResTimeStamp processing_start, unsigned long long interaction_id);
// m_entry_type defined here for both "event"s and "first-input"s
// this is the only PerformanceEntry that has two event types it could represent
// That complicates implementing the registry functions if they remain static
FlyString m_entry_type;
JS::GCPtr<DOM::EventTarget> m_event_target;
HighResolutionTime::DOMHighResTimeStamp m_start_time;
HighResolutionTime::DOMHighResTimeStamp m_processing_start;
bool m_cancelable;
unsigned long long m_interaction_id;
static WebIDL::ExceptionOr<JS::NonnullGCPtr<PerformanceEventTiming>> construct_impl(DOM::Event const&, HighResolutionTime::DOMHighResTimeStamp, unsigned long long);
virtual void initialize(JS::Realm&) override;
PerformanceTimeline::ShouldAddEntry should_add_performance_event_timing() const;
virtual void visit_edges(JS::Cell::Visitor&) override;
// FIXME: remaining algorithms described in this spec:
// https://www.w3.org/TR/event-timing/#sec-increasing-interaction-count
// https://www.w3.org/TR/event-timing/#sec-computing-interactionid
// https://www.w3.org/TR/event-timing/#sec-fin-event-timing
// https://www.w3.org/TR/event-timing/#sec-dispatch-pending
};
}