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LibWeb: Partially implement 'relative high resolution time' AOs

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This commit is contained in:
Linus Groh 2022-10-13 23:20:27 +02:00
parent caa13bf41d
commit d8ebdef010
2 changed files with 30 additions and 0 deletions
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26
Userland/Libraries/LibWeb/HighResolutionTime/TimeOrigin.cpp
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@ -6,10 +6,19 @@
*/
#include <AK/Time.h>
#include <LibWeb/HTML/Scripting/Environments.h>
#include <LibWeb/HighResolutionTime/TimeOrigin.h>
namespace Web::HighResolutionTime {
// https://w3c.github.io/hr-time/#dfn-get-time-origin-timestamp
DOMHighResTimeStamp get_time_origin_timestamp(JS::Object const& global)
{
// FIXME: Implement this.
(void)global;
return 0;
}
// https://w3c.github.io/hr-time/#dfn-coarsen-time
DOMHighResTimeStamp coarsen_time(DOMHighResTimeStamp timestamp, bool cross_origin_isolated_capability)
{
@ -18,6 +27,23 @@ DOMHighResTimeStamp coarsen_time(DOMHighResTimeStamp timestamp, bool cross_origi
return timestamp;
}
// https://w3c.github.io/hr-time/#dfn-relative-high-resolution-time
DOMHighResTimeStamp relative_high_resolution_time(DOMHighResTimeStamp time, JS::Object const& global)
{
// 1. Let coarse time be the result of calling coarsen time with time and global's relevant settings object's cross-origin isolated capability.
auto coarse_time = coarsen_time(time, HTML::relevant_settings_object(global).cross_origin_isolated_capability() == HTML::CanUseCrossOriginIsolatedAPIs::Yes);
// 2. Return the relative high resolution coarse time for coarse time and global.
return relative_high_resolution_coarsen_time(coarse_time, global);
}
// https://w3c.github.io/hr-time/#dfn-relative-high-resolution-coarse-time
DOMHighResTimeStamp relative_high_resolution_coarsen_time(DOMHighResTimeStamp coarsen_time, JS::Object const& global)
{
// The relative high resolution coarse time given a DOMHighResTimeStamp coarseTime and a global object global, is the difference between coarseTime and the result of calling get time origin timestamp with global.
return coarsen_time - get_time_origin_timestamp(global);
}
// https://w3c.github.io/hr-time/#dfn-coarsened-shared-current-time
DOMHighResTimeStamp coarsened_shared_current_time(bool cross_origin_isolated_capability)
{

4
Userland/Libraries/LibWeb/HighResolutionTime/TimeOrigin.h
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@ -7,11 +7,15 @@
#pragma once
#include <LibJS/Forward.h>
#include <LibWeb/HighResolutionTime/DOMHighResTimeStamp.h>
namespace Web::HighResolutionTime {
DOMHighResTimeStamp get_time_origin_timestamp(JS::Object const&);
DOMHighResTimeStamp coarsen_time(DOMHighResTimeStamp timestamp, bool cross_origin_isolated_capability = false);
DOMHighResTimeStamp relative_high_resolution_time(DOMHighResTimeStamp, JS::Object const&);
DOMHighResTimeStamp relative_high_resolution_coarsen_time(DOMHighResTimeStamp, JS::Object const&);
DOMHighResTimeStamp coarsened_shared_current_time(bool cross_origin_isolated_capability = false);
DOMHighResTimeStamp unsafe_shared_current_time();