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61 lines
2.6 KiB
C++
61 lines
2.6 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, Linus Groh <linusg@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/Time.h>
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#include <LibWeb/HTML/Scripting/Environments.h>
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#include <LibWeb/HighResolutionTime/TimeOrigin.h>
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namespace Web::HighResolutionTime {
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// https://w3c.github.io/hr-time/#dfn-get-time-origin-timestamp
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DOMHighResTimeStamp get_time_origin_timestamp(JS::Object const& global)
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{
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// FIXME: Implement this.
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(void)global;
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return 0;
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}
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// https://w3c.github.io/hr-time/#dfn-coarsen-time
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DOMHighResTimeStamp coarsen_time(DOMHighResTimeStamp timestamp, bool cross_origin_isolated_capability)
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{
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// FIXME: Implement this.
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(void)cross_origin_isolated_capability;
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return timestamp;
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}
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// https://w3c.github.io/hr-time/#dfn-relative-high-resolution-time
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DOMHighResTimeStamp relative_high_resolution_time(DOMHighResTimeStamp time, JS::Object const& global)
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{
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// 1. Let coarse time be the result of calling coarsen time with time and global's relevant settings object's cross-origin isolated capability.
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auto coarse_time = coarsen_time(time, HTML::relevant_settings_object(global).cross_origin_isolated_capability() == HTML::CanUseCrossOriginIsolatedAPIs::Yes);
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// 2. Return the relative high resolution coarse time for coarse time and global.
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return relative_high_resolution_coarsen_time(coarse_time, global);
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}
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// https://w3c.github.io/hr-time/#dfn-relative-high-resolution-coarse-time
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DOMHighResTimeStamp relative_high_resolution_coarsen_time(DOMHighResTimeStamp coarsen_time, JS::Object const& global)
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{
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// 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.
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return coarsen_time - get_time_origin_timestamp(global);
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}
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// https://w3c.github.io/hr-time/#dfn-coarsened-shared-current-time
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DOMHighResTimeStamp coarsened_shared_current_time(bool cross_origin_isolated_capability)
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{
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// The coarsened shared current time given an optional boolean crossOriginIsolatedCapability (default false), must return the result of calling coarsen time with the unsafe shared current time and crossOriginIsolatedCapability.
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return coarsen_time(unsafe_shared_current_time(), cross_origin_isolated_capability);
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}
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// https://w3c.github.io/hr-time/#dfn-unsafe-shared-current-time
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DOMHighResTimeStamp unsafe_shared_current_time()
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{
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// The unsafe shared current time must return the current value of the shared monotonic clock.
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return Time::now_monotonic().to_nanoseconds() / 1e6;
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}
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}
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