Update tz components for new design (#3543)

core/engine/src/builtins/temporal/time_zone/custom.rs

@@ -0,0 +1,76 @@
+//! A custom `TimeZone` object.
+use crate::{property::PropertyKey, string::utf16, Context, JsObject, JsValue};
+
+use boa_gc::{Finalize, Trace};
+use boa_temporal::{
+    components::{tz::TzProtocol, Instant},
+    TemporalError, TemporalResult,
+};
+use num_bigint::BigInt;
+
+#[derive(Debug, Clone, Trace, Finalize)]
+pub(crate) struct JsCustomTimeZone {
+    tz: JsObject,
+}
+
+impl TzProtocol for JsCustomTimeZone {
+    fn get_offset_nanos_for(&self, ctx: &mut dyn std::any::Any) -> TemporalResult<BigInt> {
+        let context = ctx
+            .downcast_mut::<Context>()
+            .expect("Context was not provided for a CustomTz");
+
+        let method = self
+            .tz
+            .get(utf16!("getOffsetNanosFor"), context)
+            .expect("Method must exist for the custom calendar to be valid.");
+
+        let result = method
+            .as_callable()
+            .expect("is method")
+            .call(&method, &[], context)
+            .map_err(|e| TemporalError::general(e.to_string()))?;
+
+        // TODO (nekevss): Validate that the below conversion is fine vs. matching to JsValue::BigInt()
+        let Some(bigint) = result.as_bigint() else {
+            return Err(TemporalError::r#type()
+                .with_message("Expected BigInt return from getOffsetNanosFor"));
+        };
+
+        Ok(bigint.as_inner().clone())
+    }
+
+    fn get_possible_instant_for(
+        &self,
+        ctx: &mut dyn std::any::Any,
+    ) -> TemporalResult<Vec<Instant>> {
+        let _context = ctx
+            .downcast_mut::<Context>()
+            .expect("Context was not provided for a CustomTz");
+
+        // TODO: Implement once Instant has been migrated to `boa_temporal`'s Instant.
+        Err(TemporalError::range().with_message("Not yet implemented."))
+    }
+
+    fn id(&self, ctx: &mut dyn std::any::Any) -> TemporalResult<String> {
+        let context = ctx
+            .downcast_mut::<Context>()
+            .expect("Context was not provided for a CustomTz");
+
+        let ident = self
+            .tz
+            .__get__(
+                &PropertyKey::from(utf16!("id")),
+                JsValue::undefined(),
+                &mut context.into(),
+            )
+            .expect("Method must exist for the custom calendar to be valid.");
+
+        let JsValue::String(id) = ident else {
+            return Err(
+                TemporalError::r#type().with_message("Invalid custom Time Zone identifier type.")
+            );
+        };
+
+        Ok(id.to_std_string_escaped())
+    }
+}

core/engine/src/builtins/temporal/time_zone/mod.rs

@@ -1,3 +1,4 @@
+//! Boa's implemetation of the `Temporal.TimeZone` builtin object.
 #![allow(dead_code)]
 
 use crate::{
@@ -13,16 +14,29 @@ use crate::{
     string::{common::StaticJsStrings, utf16},
     Context, JsArgs, JsData, JsNativeError, JsObject, JsResult, JsString, JsSymbol, JsValue,
 };
-use boa_gc::{Finalize, Trace};
+use boa_gc::{custom_trace, Finalize, Trace};
 use boa_profiler::Profiler;
-use boa_temporal::components::tz::{TimeZoneSlot, TzProtocol};
+use boa_temporal::components::tz::TimeZoneSlot;
+
+mod custom;
+
+#[doc(inline)]
+pub(crate) use custom::JsCustomTimeZone;
 
 /// The `Temporal.TimeZone` object.
-#[derive(Debug, Clone, Trace, Finalize, JsData)]
-// SAFETY: `TimeZone` doesn't contain traceable data.
-#[boa_gc(unsafe_empty_trace)]
+#[derive(Debug, Clone, Finalize, JsData)]
 pub struct TimeZone {
-    slot: TimeZoneSlot,
+    slot: TimeZoneSlot<JsCustomTimeZone>,
+}
+
+unsafe impl Trace for TimeZone {
+    custom_trace!(this, mark, {
+        match &this.slot {
+            TimeZoneSlot::Protocol(custom) => mark(custom),
+            // SAFETY: No values that are exposed to gc are in TZ
+            TimeZoneSlot::Tz(_) => {}
+        }
+    });
 }
 
 impl BuiltInObject for TimeZone {
@@ -143,7 +157,7 @@ impl TimeZone {
             .ok_or_else(|| {
                 JsNativeError::typ().with_message("this value must be a Temporal.TimeZone")
             })?;
-        Ok(JsString::from(tz.slot.id(context)).into())
+        Ok(JsString::from(tz.slot.id(context)?).into())
     }
 
     pub(crate) fn get_offset_nanoseconds_for(
@@ -257,7 +271,7 @@ impl TimeZone {
                 JsNativeError::typ().with_message("this value must be a Temporal.TimeZone")
             })?;
         // 3. Return timeZone.[[Identifier]].
-        Ok(JsString::from(tz.slot.id(context)).into())
+        Ok(JsString::from(tz.slot.id(context)?).into())
     }
 }
 

core/engine/src/builtins/temporal/zoned_date_time/mod.rs

@@ -7,18 +7,32 @@ use crate::{
     string::common::StaticJsStrings,
     Context, JsBigInt, JsData, JsNativeError, JsObject, JsResult, JsString, JsSymbol, JsValue,
 };
-use boa_gc::{Finalize, Trace};
+use boa_gc::{custom_trace, Finalize, Trace};
 use boa_profiler::Profiler;
-use boa_temporal::components::{Duration as TemporalDuration, ZonedDateTime as InnerZdt};
+use boa_temporal::components::{
+    calendar::CalendarSlot, tz::TimeZoneSlot, Duration as TemporalDuration,
+    ZonedDateTime as InnerZdt,
+};
 
-use super::JsCustomCalendar;
+use super::{JsCustomCalendar, JsCustomTimeZone};
 
 /// The `Temporal.ZonedDateTime` object.
-#[derive(Debug, Clone, Finalize, Trace, JsData)]
-// SAFETY: ZonedDateTime does not contain any traceable types.
-#[boa_gc(unsafe_empty_trace)]
+#[derive(Debug, Clone, Finalize, JsData)]
 pub struct ZonedDateTime {
-    pub(crate) inner: InnerZdt<JsCustomCalendar>,
+    pub(crate) inner: InnerZdt<JsCustomCalendar, JsCustomTimeZone>,
+}
+
+unsafe impl Trace for ZonedDateTime {
+    custom_trace!(this, mark, {
+        match this.inner.calendar() {
+            CalendarSlot::Protocol(custom) => mark(custom),
+            CalendarSlot::Builtin(_) => {}
+        }
+        match this.inner.tz() {
+            TimeZoneSlot::Protocol(custom) => mark(custom),
+            TimeZoneSlot::Tz(_) => {}
+        }
+    });
 }
 
 impl BuiltInObject for ZonedDateTime {

core/temporal/src/components/duration.rs

@@ -8,7 +8,7 @@ use crate::{
 };
 use std::{any::Any, str::FromStr};
 
-use super::calendar::CalendarProtocol;
+use super::{calendar::CalendarProtocol, tz::TzProtocol};
 
 // ==== `DateDuration` ====
 
@@ -1161,7 +1161,7 @@ impl Duration {
     ///   seconds, milliseconds, microseconds, nanoseconds, increment, unit,
     ///   roundingMode [ , plainRelativeTo [, zonedRelativeTo [, precalculatedDateTime]]] )`
     #[allow(clippy::type_complexity)]
-    pub fn round_duration<C: CalendarProtocol>(
+    pub fn round_duration<C: CalendarProtocol, Z: TzProtocol>(
         &self,
         unbalance_date_duration: DateDuration,
         increment: f64,
@@ -1169,7 +1169,7 @@ impl Duration {
         rounding_mode: TemporalRoundingMode,
         relative_targets: (
             Option<&Date<C>>,
-            Option<&ZonedDateTime<C>>,
+            Option<&ZonedDateTime<C, Z>>,
             Option<&DateTime<C>>,
         ),
         context: &mut dyn Any,

core/temporal/src/components/tz.rs

@@ -16,29 +16,14 @@ use super::calendar::CalendarProtocol;
 pub const TIME_ZONE_PROPERTIES: [&str; 3] =
     ["getOffsetNanosecondsFor", "getPossibleInstantsFor", "id"];
 
-/// A clonable `TzProtocol`
-pub trait TzProtocolClone {
-    /// Clones the current `TimeZoneProtocol`.
-    fn clone_box(&self) -> Box<dyn TzProtocol>;
-}
-
-impl<P> TzProtocolClone for P
-where
-    P: 'static + TzProtocol + Clone,
-{
-    fn clone_box(&self) -> Box<dyn TzProtocol> {
-        Box::new(self.clone())
-    }
-}
-
 /// The Time Zone Protocol that must be implemented for time zones.
-pub trait TzProtocol: TzProtocolClone {
+pub trait TzProtocol: Clone {
     /// Get the Offset nanoseconds for this `TimeZone`
     fn get_offset_nanos_for(&self, context: &mut dyn Any) -> TemporalResult<BigInt>;
     /// Get the possible Instant for this `TimeZone`
     fn get_possible_instant_for(&self, context: &mut dyn Any) -> TemporalResult<Vec<Instant>>; // TODO: Implement Instant
     /// Get the `TimeZone`'s identifier.
-    fn id(&self, context: &mut dyn Any) -> String;
+    fn id(&self, context: &mut dyn Any) -> TemporalResult<String>;
 }
 
 /// A Temporal `TimeZone`.
@@ -50,14 +35,15 @@ pub struct TimeZone {
 }
 
 /// The `TimeZoneSlot` represents a `[[TimeZone]]` internal slot value.
-pub enum TimeZoneSlot {
+#[derive(Clone)]
+pub enum TimeZoneSlot<Z: TzProtocol> {
     /// A native `TimeZone` representation.
     Tz(TimeZone),
     /// A Custom `TimeZone` that implements the `TzProtocol`.
-    Protocol(Box<dyn TzProtocol>),
+    Protocol(Z),
 }
 
-impl core::fmt::Debug for TimeZoneSlot {
+impl<Z: TzProtocol> core::fmt::Debug for TimeZoneSlot<Z> {
     fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::Tz(tz) => write!(f, "{tz:?}"),
@@ -66,16 +52,7 @@ impl core::fmt::Debug for TimeZoneSlot {
     }
 }
 
-impl Clone for TimeZoneSlot {
-    fn clone(&self) -> Self {
-        match self {
-            Self::Tz(tz) => Self::Tz(tz.clone()),
-            Self::Protocol(p) => Self::Protocol(p.clone_box()),
-        }
-    }
-}
-
-impl TimeZoneSlot {
+impl<Z: TzProtocol> TimeZoneSlot<Z> {
     pub(crate) fn get_datetime_for<C: CalendarProtocol>(
         &self,
         instant: &Instant,
@@ -87,8 +64,9 @@ impl TimeZoneSlot {
     }
 }
 
-impl TzProtocol for TimeZoneSlot {
-    fn get_offset_nanos_for(&self, context: &mut dyn Any) -> TemporalResult<BigInt> {
+impl<Z: TzProtocol> TimeZoneSlot<Z> {
+    /// Get the offset for this current `TimeZoneSlot`.
+    pub fn get_offset_nanos_for(&self, context: &mut dyn Any) -> TemporalResult<BigInt> {
         // 1. Let timeZone be the this value.
         // 2. Perform ? RequireInternalSlot(timeZone, [[InitializedTemporalTimeZone]]).
         // 3. Set instant to ? ToTemporalInstant(instant).
@@ -106,14 +84,30 @@ impl TzProtocol for TimeZoneSlot {
         }
     }
 
-    fn get_possible_instant_for(&self, _context: &mut dyn Any) -> TemporalResult<Vec<Instant>> {
+    /// Get the possible `Instant`s for this `TimeZoneSlot`.
+    pub fn get_possible_instant_for(&self, _context: &mut dyn Any) -> TemporalResult<Vec<Instant>> {
         Err(TemporalError::general("Not yet implemented."))
     }
 
-    fn id(&self, context: &mut dyn Any) -> String {
+    /// Returns the current `TimeZoneSlot`'s identifier.
+    pub fn id(&self, context: &mut dyn Any) -> TemporalResult<String> {
         match self {
-            Self::Tz(_) => todo!("implement tz.to_string"),
+            Self::Tz(_) => Err(TemporalError::range().with_message("Not yet implemented.")), // TODO: Implement Display for Time Zone.
             Self::Protocol(tz) => tz.id(context),
         }
     }
 }
+
+impl TzProtocol for () {
+    fn get_offset_nanos_for(&self, _: &mut dyn Any) -> TemporalResult<BigInt> {
+        unreachable!()
+    }
+
+    fn get_possible_instant_for(&self, _: &mut dyn Any) -> TemporalResult<Vec<Instant>> {
+        unreachable!()
+    }
+
+    fn id(&self, _: &mut dyn Any) -> TemporalResult<String> {
+        Ok("() TimeZone".to_owned())
+    }
+}

core/temporal/src/components/zoneddatetime.rs

@@ -14,24 +14,26 @@ use crate::{
 
 use core::any::Any;
 
+use super::tz::TzProtocol;
+
 /// The native Rust implementation of `Temporal.ZonedDateTime`.
 #[derive(Debug, Clone)]
-pub struct ZonedDateTime<C: CalendarProtocol> {
+pub struct ZonedDateTime<C: CalendarProtocol, Z: TzProtocol> {
     instant: Instant,
     calendar: CalendarSlot<C>,
-    tz: TimeZoneSlot,
+    tz: TimeZoneSlot<Z>,
 }
 
 // ==== Private API ====
 
-impl<C: CalendarProtocol> ZonedDateTime<C> {
+impl<C: CalendarProtocol, Z: TzProtocol> ZonedDateTime<C, Z> {
     /// Creates a `ZonedDateTime` without validating the input.
     #[inline]
     #[must_use]
     pub(crate) fn new_unchecked(
         instant: Instant,
         calendar: CalendarSlot<C>,
-        tz: TimeZoneSlot,
+        tz: TimeZoneSlot<Z>,
     ) -> Self {
         Self {
             instant,
@@ -43,21 +45,32 @@ impl<C: CalendarProtocol> ZonedDateTime<C> {
 
 // ==== Public API ====
 
-impl<C: CalendarProtocol> ZonedDateTime<C> {
+impl<C: CalendarProtocol, Z: TzProtocol> ZonedDateTime<C, Z> {
     /// Creates a new valid `ZonedDateTime`.
     #[inline]
-    pub fn new(nanos: BigInt, calendar: CalendarSlot<C>, tz: TimeZoneSlot) -> TemporalResult<Self> {
+    pub fn new(
+        nanos: BigInt,
+        calendar: CalendarSlot<C>,
+        tz: TimeZoneSlot<Z>,
+    ) -> TemporalResult<Self> {
         let instant = Instant::new(nanos)?;
         Ok(Self::new_unchecked(instant, calendar, tz))
     }
 
-    /// Returns the `ZonedDateTime`'s Calendar identifier.
+    /// Returns `ZonedDateTime`'s Calendar.
     #[inline]
     #[must_use]
     pub fn calendar(&self) -> &CalendarSlot<C> {
         &self.calendar
     }
 
+    /// Returns `ZonedDateTime`'s `TimeZone` slot.
+    #[inline]
+    #[must_use]
+    pub fn tz(&self) -> &TimeZoneSlot<Z> {
+        &self.tz
+    }
+
     /// Returns the `epochSeconds` value of this `ZonedDateTime`.
     #[must_use]
     pub fn epoch_seconds(&self) -> f64 {
@@ -85,7 +98,7 @@ impl<C: CalendarProtocol> ZonedDateTime<C> {
 
 // ==== Context based API ====
 
-impl<C: CalendarProtocol> ZonedDateTime<C> {
+impl<C: CalendarProtocol, Z: TzProtocol> ZonedDateTime<C, Z> {
     /// Returns the `year` value for this `ZonedDateTime`.
     #[inline]
     pub fn contextual_year(&self, context: &mut dyn Any) -> TemporalResult<i32> {
@@ -236,7 +249,7 @@ mod tests {
     fn basic_zdt_test() {
         let nov_30_2023_utc = BigInt::from(1_701_308_952_000_000_000i64);
 
-        let zdt = ZonedDateTime::<()>::new(
+        let zdt = ZonedDateTime::<(), ()>::new(
             nov_30_2023_utc.clone(),
             CalendarSlot::from_str("iso8601").unwrap(),
             TimeZoneSlot::Tz(TimeZone {
@@ -253,7 +266,7 @@ mod tests {
         assert_eq!(zdt.minute().unwrap(), 49);
         assert_eq!(zdt.second().unwrap(), 12);
 
-        let zdt_minus_five = ZonedDateTime::<()>::new(
+        let zdt_minus_five = ZonedDateTime::<(), ()>::new(
             nov_30_2023_utc,
             CalendarSlot::from_str("iso8601").unwrap(),
             TimeZoneSlot::Tz(TimeZone {