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LibWeb: Implement PerformanceObserver
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22 changed files with 793 additions and 57 deletions
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/*
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* Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/QuickSort.h>
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#include <LibWeb/Bindings/Intrinsics.h>
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#include <LibWeb/Bindings/PerformanceObserverEntryListPrototype.h>
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#include <LibWeb/PerformanceTimeline/PerformanceEntry.h>
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#include <LibWeb/PerformanceTimeline/PerformanceObserverEntryList.h>
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#include <LibWeb/WebIDL/ExceptionOr.h>
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namespace Web::PerformanceTimeline {
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PerformanceObserverEntryList::PerformanceObserverEntryList(JS::Realm& realm, Vector<JS::NonnullGCPtr<PerformanceTimeline::PerformanceEntry>>&& entry_list)
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: Bindings::PlatformObject(realm)
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, m_entry_list(move(entry_list))
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{
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}
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PerformanceObserverEntryList::~PerformanceObserverEntryList() = default;
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void PerformanceObserverEntryList::initialize(JS::Realm& realm)
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{
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Base::initialize(realm);
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set_prototype(&Bindings::ensure_web_prototype<Bindings::PerformanceObserverEntryListPrototype>(realm, "PerformanceObserverEntryList"));
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}
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void PerformanceObserverEntryList::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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for (auto& entry : m_entry_list)
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visitor.visit(entry);
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}
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// https://www.w3.org/TR/performance-timeline/#dfn-filter-buffer-by-name-and-type
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ErrorOr<Vector<JS::Handle<PerformanceTimeline::PerformanceEntry>>> filter_buffer_by_name_and_type(Vector<JS::NonnullGCPtr<PerformanceTimeline::PerformanceEntry>> const& buffer, Optional<String> name, Optional<String> type)
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{
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// 1. Let result be an initially empty list.
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Vector<JS::Handle<PerformanceTimeline::PerformanceEntry>> result;
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// 2. For each PerformanceEntry entry in buffer, run the following steps:
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for (auto const& entry : buffer) {
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// 1. If type is not null and if type is not identical to entry's entryType attribute, continue to next entry.
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if (type.has_value() && type.value() != entry->entry_type())
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continue;
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// 2. If name is not null and if name is not identical to entry's name attribute, continue to next entry.
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if (name.has_value() && name.value() != entry->name())
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continue;
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// 3. append entry to result.
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TRY(result.try_append(entry));
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}
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// 3. Sort results's entries in chronological order with respect to startTime
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quick_sort(result, [](auto const& left_entry, auto const& right_entry) {
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return left_entry->start_time() < right_entry->start_time();
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});
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// 4. Return result.
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return result;
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}
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// https://w3c.github.io/performance-timeline/#dom-performanceobserverentrylist-getentries
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WebIDL::ExceptionOr<Vector<JS::Handle<PerformanceTimeline::PerformanceEntry>>> PerformanceObserverEntryList::get_entries() const
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{
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// Returns a PerformanceEntryList object returned by filter buffer by name and type algorithm with this's entry list,
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// name and type set to null.
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return TRY_OR_THROW_OOM(vm(), filter_buffer_by_name_and_type(m_entry_list, /* name= */ Optional<String> {}, /* type= */ Optional<String> {}));
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}
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// https://w3c.github.io/performance-timeline/#dom-performanceobserverentrylist-getentriesbytype
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WebIDL::ExceptionOr<Vector<JS::Handle<PerformanceTimeline::PerformanceEntry>>> PerformanceObserverEntryList::get_entries_by_type(String const& type) const
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{
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// Returns a PerformanceEntryList object returned by filter buffer by name and type algorithm with this's entry list,
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// name set to null, and type set to the method's input type parameter.
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return TRY_OR_THROW_OOM(vm(), filter_buffer_by_name_and_type(m_entry_list, /* name= */ Optional<String> {}, type));
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}
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// https://w3c.github.io/performance-timeline/#dom-performanceobserverentrylist-getentriesbyname
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WebIDL::ExceptionOr<Vector<JS::Handle<PerformanceTimeline::PerformanceEntry>>> PerformanceObserverEntryList::get_entries_by_name(String const& name, Optional<String> type) const
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{
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// Returns a PerformanceEntryList object returned by filter buffer by name and type algorithm with this's entry list,
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// name set to the method input name parameter, and type set to null if optional entryType is omitted, or set to the
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// method's input type parameter otherwise.
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return TRY_OR_THROW_OOM(vm(), filter_buffer_by_name_and_type(m_entry_list, name, type));
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}
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}
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