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218ac86b67
Fixes a crash when setting the timestamps when creating a DOM event within a ShadowRealm.
97 lines
4.5 KiB
C++
97 lines
4.5 KiB
C++
/*
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* Copyright (c) 2022, Andreas Kling <andreas@ladybird.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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(void)global;
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// To get time origin timestamp, given a global object global, run the following steps, which return a duration:
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// FIXME: 1. Let timeOrigin be global's relevant settings object's time origin.
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auto time_origin = 0;
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// Each group of environment settings objects that could possibly communicate in any way
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// has an estimated monotonic time of the Unix epoch, a moment on the monotonic clock,
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// whose value is initialized by the following steps:
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// !. Let wall time be the wall clock's unsafe current time.
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struct timeval tv;
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gettimeofday(&tv, nullptr);
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auto wall_time = tv.tv_sec * 1000.0 + tv.tv_usec / 1000.0;
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// 2. Let monotonic time be the monotonic clock's unsafe current time.
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auto monotonic_time = unsafe_shared_current_time();
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// 3. Let epoch time be monotonic time - (wall time - Unix epoch)
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auto epoch_time = monotonic_time - (wall_time - 0);
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// 4. Initialize the estimated monotonic time of the Unix epoch to the result of calling coarsen time with epoch time
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auto estimated_monotonic_time = coarsen_time(epoch_time);
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// 2. Return the duration from the estimated monotonic time of the Unix epoch to timeOrigin.
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return estimated_monotonic_time - time_origin;
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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-current-high-resolution-time
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DOMHighResTimeStamp current_high_resolution_time(JS::Object const& global)
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{
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// The current high resolution time given a global object current global must return the result
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// of relative high resolution time given unsafe shared current time and current global.
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return HighResolutionTime::relative_high_resolution_time(HighResolutionTime::unsafe_shared_current_time(), global);
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}
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// https://w3c.github.io/hr-time/#dfn-relative-high-resolution-time
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// https://pr-preview.s3.amazonaws.com/w3c/hr-time/pull/168.html#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 settings be the global's relevant principal settings object.
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auto& settings = HTML::relevant_principal_settings_object(global);
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// 2. Let coarse time be the result of calling coarsen time with time and settings's cross-origin isolated capability.
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auto coarse_time = coarsen_time(time, settings.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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// Note: This is in milliseconds (stored as a double).
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return MonotonicTime::now().nanoseconds() / 1.0e6;
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}
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}
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