LibWeb: Add a time origin property for all ESOs

This acts as a baseline for performance related timestamps.

Libraries/LibWeb/HTML/Scripting/EnvironmentSettingsSnapshot.cpp

@@ -16,12 +16,12 @@ EnvironmentSettingsSnapshot::EnvironmentSettingsSnapshot(NonnullOwnPtr<JS::Execu
     , m_url(serialized_settings.api_base_url)
     , m_origin(serialized_settings.origin)
     , m_policy_container(serialized_settings.policy_container)
+    , m_time_origin(serialized_settings.time_origin)
 {
     // Why can't we put these in the init list? grandparent class members are strange it seems
     this->id = serialized_settings.id;
     this->creation_url = serialized_settings.creation_url;
     this->top_level_creation_url = serialized_settings.top_level_creation_url;
-    this->top_level_creation_url = serialized_settings.top_level_creation_url;
 }
 
 // Out of line to ensure this class has a key function

Libraries/LibWeb/HTML/Scripting/EnvironmentSettingsSnapshot.h

@@ -28,12 +28,14 @@ public:
     URL::Origin origin() const override { return m_origin; }
     PolicyContainer policy_container() const override { return m_policy_container; }
     CanUseCrossOriginIsolatedAPIs cross_origin_isolated_capability() const override { return CanUseCrossOriginIsolatedAPIs::No; }
+    double time_origin() const override { return m_time_origin; }
 
 private:
     String m_api_url_character_encoding;
     URL::URL m_url;
     URL::Origin m_origin;
     HTML::PolicyContainer m_policy_container;
+    double m_time_origin { 0 };
 };
 
 }

Libraries/LibWeb/HTML/Scripting/Environments.h

@@ -87,6 +87,9 @@ public:
     // https://html.spec.whatwg.org/multipage/webappapis.html#concept-settings-object-cross-origin-isolated-capability
     virtual CanUseCrossOriginIsolatedAPIs cross_origin_isolated_capability() const = 0;
 
+    // https://html.spec.whatwg.org/multipage/webappapis.html#concept-settings-object-time-origin
+    virtual double time_origin() const = 0;
+
     URL::URL parse_url(StringView);
     URL::URL encoding_parse_url(StringView);
     Optional<String> encoding_parse_and_serialize_url(StringView);

Libraries/LibWeb/HTML/Scripting/SerializedEnvironmentSettingsObject.cpp

@@ -22,6 +22,7 @@ ErrorOr<void> encode(Encoder& encoder, Web::HTML::SerializedEnvironmentSettingsO
     TRY(encoder.encode(object.origin));
     TRY(encoder.encode(object.policy_container));
     TRY(encoder.encode(object.cross_origin_isolated_capability));
+    TRY(encoder.encode(object.time_origin));
 
     return {};
 }
@@ -40,6 +41,7 @@ ErrorOr<Web::HTML::SerializedEnvironmentSettingsObject> decode(Decoder& decoder)
     object.origin = TRY(decoder.decode<URL::Origin>());
     object.policy_container = TRY(decoder.decode<Web::HTML::PolicyContainer>());
     object.cross_origin_isolated_capability = TRY(decoder.decode<Web::HTML::CanUseCrossOriginIsolatedAPIs>());
+    object.time_origin = TRY(decoder.decode<double>());
 
     return object;
 }

Libraries/LibWeb/HTML/Scripting/SerializedEnvironmentSettingsObject.h

@@ -30,6 +30,7 @@ struct SerializedEnvironmentSettingsObject {
     URL::Origin origin;
     PolicyContainer policy_container;
     CanUseCrossOriginIsolatedAPIs cross_origin_isolated_capability;
+    double time_origin;
 };
 
 }

Libraries/LibWeb/HTML/Scripting/WindowEnvironmentSettingsObject.cpp

@@ -117,6 +117,13 @@ PolicyContainer WindowEnvironmentSettingsObject::policy_container() const
     return m_window->associated_document().policy_container();
 }
 
+// https://html.spec.whatwg.org/multipage/nav-history-apis.html#script-settings-for-window-objects:concept-settings-object-time-origin
+double WindowEnvironmentSettingsObject::time_origin() const
+{
+    // Return window's associated Document's load timing info's navigation start time.
+    return m_window->associated_document().load_timing_info().navigation_start_time;
+}
+
 // https://html.spec.whatwg.org/multipage/window-object.html#script-settings-for-window-objects:concept-settings-object-cross-origin-isolated-capability
 CanUseCrossOriginIsolatedAPIs WindowEnvironmentSettingsObject::cross_origin_isolated_capability() const
 {

Libraries/LibWeb/HTML/Scripting/WindowEnvironmentSettingsObject.h

@@ -26,6 +26,7 @@ public:
     virtual URL::Origin origin() const override;
     virtual PolicyContainer policy_container() const override;
     virtual CanUseCrossOriginIsolatedAPIs cross_origin_isolated_capability() const override;
+    virtual double time_origin() const override;
 
 private:
     WindowEnvironmentSettingsObject(Window&, NonnullOwnPtr<JS::ExecutionContext>);

Libraries/LibWeb/HTML/Scripting/WorkerEnvironmentSettingsObject.cpp

@@ -18,8 +18,6 @@ GC_DEFINE_ALLOCATOR(WorkerEnvironmentSettingsObject);
 // https://html.spec.whatwg.org/multipage/workers.html#set-up-a-worker-environment-settings-object
 GC::Ref<WorkerEnvironmentSettingsObject> WorkerEnvironmentSettingsObject::setup(GC::Ref<Page> page, NonnullOwnPtr<JS::ExecutionContext> execution_context, SerializedEnvironmentSettingsObject const& outside_settings, HighResolutionTime::DOMHighResTimeStamp unsafe_worker_creation_time)
 {
-    (void)unsafe_worker_creation_time;
-
     // 1. Let inherited origin be outside settings's origin.
     auto inherited_origin = outside_settings.origin;
 
@@ -32,7 +30,7 @@ GC::Ref<WorkerEnvironmentSettingsObject> WorkerEnvironmentSettingsObject::setup(
 
     // 4. Let settings object be a new environment settings object whose algorithms are defined as follows:
     // NOTE: See the functions defined for this class.
-    auto settings_object = realm->create<WorkerEnvironmentSettingsObject>(move(execution_context), worker);
+    auto settings_object = realm->create<WorkerEnvironmentSettingsObject>(move(execution_context), worker, unsafe_worker_creation_time);
     settings_object->target_browsing_context = nullptr;
     settings_object->m_origin = move(inherited_origin);
 
@@ -80,6 +78,12 @@ CanUseCrossOriginIsolatedAPIs WorkerEnvironmentSettingsObject::cross_origin_isol
     return CanUseCrossOriginIsolatedAPIs::No;
 }
 
+double WorkerEnvironmentSettingsObject::time_origin() const
+{
+    // Return the result of coarsening unsafeWorkerCreationTime with worker global scope's cross-origin isolated capability.
+    return HighResolutionTime::coarsen_time(m_unsafe_worker_creation_time, cross_origin_isolated_capability() == CanUseCrossOriginIsolatedAPIs::Yes);
+}
+
 void WorkerEnvironmentSettingsObject::visit_edges(JS::Cell::Visitor& visitor)
 {
     Base::visit_edges(visitor);

Libraries/LibWeb/HTML/Scripting/WorkerEnvironmentSettingsObject.h

@@ -18,9 +18,10 @@ class WorkerEnvironmentSettingsObject final
     GC_DECLARE_ALLOCATOR(WorkerEnvironmentSettingsObject);
 
 public:
-    WorkerEnvironmentSettingsObject(NonnullOwnPtr<JS::ExecutionContext> execution_context, GC::Ref<WorkerGlobalScope> global_scope)
+    WorkerEnvironmentSettingsObject(NonnullOwnPtr<JS::ExecutionContext> execution_context, GC::Ref<WorkerGlobalScope> global_scope, HighResolutionTime::DOMHighResTimeStamp unsafe_worker_creation_time)
         : EnvironmentSettingsObject(move(execution_context))
         , m_global_scope(global_scope)
+        , m_unsafe_worker_creation_time(unsafe_worker_creation_time)
     {
     }
 
@@ -34,6 +35,7 @@ public:
     URL::Origin origin() const override;
     PolicyContainer policy_container() const override;
     CanUseCrossOriginIsolatedAPIs cross_origin_isolated_capability() const override;
+    double time_origin() const override;
 
 private:
     virtual void visit_edges(JS::Cell::Visitor&) override;
@@ -42,6 +44,8 @@ private:
     URL::Origin m_origin;
 
     GC::Ref<WorkerGlobalScope> m_global_scope;
+
+    HighResolutionTime::DOMHighResTimeStamp m_unsafe_worker_creation_time { 0 };
 };
 
 }