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serenity/Userland/Libraries/LibWeb/Animations/DocumentTimeline.cpp
Andreas Kling bfd354492e LibWeb: Put most LibWeb GC objects in type-specific heap blocks
With this change, we now have ~1200 CellAllocators across both LibJS and
LibWeb in a normal WebContent instance.

This gives us a minimum heap size of 4.7 MiB in the scenario where we
only have one cell allocated per type. Of course, in practice there will
be many more of each type, so the effective overhead is quite a bit
smaller than that in practice.

I left a few types unconverted to this mechanism because I got tired of
doing this. :^)
2023-11-19 22:00:48 +01:00

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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_original_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 timelines 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
WebIDL::ExceptionOr<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 timelines origin time.
if (!current_time.has_value())
TRY(Base::set_current_time({}));
else
TRY(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());
return {};
}
// 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"));
}
}