webxr: Implement XRBoundedReferenceSpace (#33176)

* Implement XRBoundedReferenceSpace

Signed-off-by: Daniel Adams <msub2official@gmail.com>

* Update expectations

Signed-off-by: Daniel Adams <msub2official@gmail.com>

* Update interfaces

Signed-off-by: Daniel Adams <msub2official@gmail.com>

* Add missing pref condition on IDL interface

Signed-off-by: Daniel Adams <msub2official@gmail.com>

---------

Signed-off-by: Daniel Adams <msub2official@gmail.com>

components/script/dom/xrboundedreferencespace.rs

@@ -0,0 +1,98 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+use dom_struct::dom_struct;
+use js::jsval::JSVal;
+
+use crate::dom::bindings::codegen::Bindings::XRBoundedReferenceSpaceBinding::XRBoundedReferenceSpaceMethods;
+use crate::dom::bindings::codegen::Bindings::XRReferenceSpaceBinding::XRReferenceSpaceType;
+use crate::dom::bindings::reflector::{reflect_dom_object, DomObject};
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::bindings::utils::to_frozen_array;
+use crate::dom::dompointreadonly::DOMPointReadOnly;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::xrreferencespace::XRReferenceSpace;
+use crate::dom::xrrigidtransform::XRRigidTransform;
+use crate::dom::xrsession::XRSession;
+use crate::script_runtime::JSContext;
+
+#[dom_struct]
+pub struct XRBoundedReferenceSpace {
+    xrspace: XRReferenceSpace,
+    offset: Dom<XRRigidTransform>,
+}
+
+impl XRBoundedReferenceSpace {
+    pub fn new_inherited(
+        session: &XRSession,
+        offset: &XRRigidTransform,
+    ) -> XRBoundedReferenceSpace {
+        XRBoundedReferenceSpace {
+            xrspace: XRReferenceSpace::new_inherited(
+                session,
+                offset,
+                XRReferenceSpaceType::Bounded_floor,
+            ),
+            offset: Dom::from_ref(offset),
+        }
+    }
+
+    #[allow(unused)]
+    pub fn new(global: &GlobalScope, session: &XRSession) -> DomRoot<XRBoundedReferenceSpace> {
+        let offset = XRRigidTransform::identity(global);
+        Self::new_offset(global, session, &offset)
+    }
+
+    #[allow(unused)]
+    pub fn new_offset(
+        global: &GlobalScope,
+        session: &XRSession,
+        offset: &XRRigidTransform,
+    ) -> DomRoot<XRBoundedReferenceSpace> {
+        reflect_dom_object(
+            Box::new(XRBoundedReferenceSpace::new_inherited(session, offset)),
+            global,
+        )
+    }
+}
+
+impl XRBoundedReferenceSpaceMethods for XRBoundedReferenceSpace {
+    /// <https://www.w3.org/TR/webxr/#dom-xrboundedreferencespace-boundsgeometry>
+    fn BoundsGeometry(&self, cx: JSContext) -> JSVal {
+        if let Some(bounds) = self.xrspace.get_bounds() {
+            let point1 = DOMPointReadOnly::new(
+                &self.global(),
+                bounds.min.x.into(),
+                0.0,
+                bounds.min.y.into(),
+                1.0,
+            );
+            let point2 = DOMPointReadOnly::new(
+                &self.global(),
+                bounds.min.x.into(),
+                0.0,
+                bounds.max.y.into(),
+                1.0,
+            );
+            let point3 = DOMPointReadOnly::new(
+                &self.global(),
+                bounds.max.x.into(),
+                0.0,
+                bounds.max.y.into(),
+                1.0,
+            );
+            let point4 = DOMPointReadOnly::new(
+                &self.global(),
+                bounds.max.x.into(),
+                0.0,
+                bounds.min.y.into(),
+                1.0,
+            );
+
+            to_frozen_array(&[point1, point2, point3, point4], cx)
+        } else {
+            to_frozen_array::<DomRoot<DOMPointReadOnly>>(&[], cx)
+        }
+    }
+}