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- /*
- * Copyright (c) 2023, Matthew Olsson <mattco@serenityos.org>.
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
- #include <LibJS/Heap/Heap.h>
- #include <LibJS/Runtime/Realm.h>
- #include <LibWeb/Animations/DocumentTimeline.h>
- #include <LibWeb/DOM/Document.h>
- #include <LibWeb/HTML/Window.h>
- #include <LibWeb/WebIDL/ExceptionOr.h>
- namespace Web::Animations {
- JS_DEFINE_ALLOCATOR(DocumentTimeline);
- JS::NonnullGCPtr<DocumentTimeline> DocumentTimeline::create(JS::Realm& realm, DOM::Document& document, HighResolutionTime::DOMHighResTimeStamp origin_time)
- {
- return realm.heap().allocate<DocumentTimeline>(realm, realm, document, origin_time);
- }
- // https://www.w3.org/TR/web-animations-1/#dom-documenttimeline-documenttimeline
- WebIDL::ExceptionOr<JS::NonnullGCPtr<DocumentTimeline>> DocumentTimeline::construct_impl(JS::Realm& realm, DocumentTimelineOptions options)
- {
- // Creates a new DocumentTimeline. The Document with which the timeline is associated is the Document associated
- // with the Window that is the current global object.
- auto& window = verify_cast<HTML::Window>(realm.global_object());
- return create(realm, window.associated_document(), options.origin_time);
- }
- // https://www.w3.org/TR/web-animations-1/#ref-for-timeline-time-to-origin-relative-time
- Optional<double> DocumentTimeline::convert_a_timeline_time_to_an_origin_relative_time(Optional<double> timeline_time)
- {
- // To convert a timeline time, timeline time, to an origin-relative time for a document timeline, timeline, return
- // the sum of the timeline time and timeline’s origin time. If timeline is inactive, return an unresolved time
- // value.
- if (is_inactive() || !timeline_time.has_value())
- return {};
- return timeline_time.value() + m_origin_time;
- }
- // https://www.w3.org/TR/web-animations-1/#origin-time
- void DocumentTimeline::set_current_time(Optional<double> current_time)
- {
- // A document timeline is a type of timeline that is associated with a document and whose current time is calculated
- // as a fixed offset from the now timestamp provided each time the update animations and send events procedure is
- // run. This fixed offset is referred to as the document timeline’s origin time.
- if (!current_time.has_value())
- Base::set_current_time({});
- else
- Base::set_current_time(current_time.value() - m_origin_time);
- // After a document timeline becomes active, it is monotonically increasing.
- if (!is_inactive())
- VERIFY(is_monotonically_increasing());
- }
- // https://www.w3.org/TR/web-animations-1/#document-timelines
- bool DocumentTimeline::is_inactive() const
- {
- // A document timeline that is associated with a Document which is not an active document is also considered to be
- // inactive.
- return Base::is_inactive() || !associated_document()->is_active();
- }
- DocumentTimeline::DocumentTimeline(JS::Realm& realm, DOM::Document& document, HighResolutionTime::DOMHighResTimeStamp origin_time)
- : AnimationTimeline(realm)
- , m_origin_time(origin_time)
- {
- set_associated_document(document);
- }
- void DocumentTimeline::initialize(JS::Realm& realm)
- {
- Base::initialize(realm);
- set_prototype(&Bindings::ensure_web_prototype<Bindings::DocumentTimelinePrototype>(realm, "DocumentTimeline"_fly_string));
- }
- }
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