4 files changed, 48 insertions, 12 deletions

diff --git a/components/script/dom/webidls/XRReferenceSpace.webidl b/components/script/dom/webidls/XRReferenceSpace.webidl
index fdedfe0bb4f..378a4e520ee 100644
--- a/components/script/dom/webidls/XRReferenceSpace.webidl
+++ b/components/script/dom/webidls/XRReferenceSpace.webidl
@@ -16,6 +16,6 @@ dictionary XRReferenceSpaceOptions {
 
 [SecureContext, Exposed=Window, Pref="dom.webxr.enabled"]
 interface XRReferenceSpace : XRSpace {
-  // attribute XRRigidTransform originOffset;
+  attribute XRRigidTransform originOffset;
   // attribute EventHandler onreset;
 };
diff --git a/components/script/dom/xrreferencespace.rs b/components/script/dom/xrreferencespace.rs
index 308b710d928..7d573a165c3 100644
--- a/components/script/dom/xrreferencespace.rs
+++ b/components/script/dom/xrreferencespace.rs
@@ -3,30 +3,52 @@
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
 use crate::dom::bindings::codegen::Bindings::XRReferenceSpaceBinding;
+use crate::dom::bindings::codegen::Bindings::XRReferenceSpaceBinding::XRReferenceSpaceMethods;
 use crate::dom::bindings::reflector::reflect_dom_object;
-use crate::dom::bindings::root::DomRoot;
-use crate::dom::globalscope::GlobalScope;
+use crate::dom::bindings::root::{DomRoot, MutDom};
+use crate::dom::dompointreadonly::DOMPointReadOnly;
+use crate::dom::window::Window;
+use crate::dom::xrrigidtransform::XRRigidTransform;
 use crate::dom::xrspace::XRSpace;
 use dom_struct::dom_struct;
 
 #[dom_struct]
 pub struct XRReferenceSpace {
     xrspace: XRSpace,
+    transform: MutDom<XRRigidTransform>,
 }
 
 impl XRReferenceSpace {
-    pub fn new_inherited() -> XRReferenceSpace {
+    pub fn new_inherited(transform: &XRRigidTransform) -> XRReferenceSpace {
         XRReferenceSpace {
             xrspace: XRSpace::new_inherited(),
+            transform: MutDom::new(transform),
         }
     }
 
     #[allow(unused)]
-    pub fn new(global: &GlobalScope) -> DomRoot<XRReferenceSpace> {
+    pub fn new(
+        global: &Window,
+        position: &DOMPointReadOnly,
+        orientation: &DOMPointReadOnly,
+    ) -> DomRoot<XRReferenceSpace> {
+        let transform = XRRigidTransform::identity(global);
         reflect_dom_object(
-            Box::new(XRReferenceSpace::new_inherited()),
+            Box::new(XRReferenceSpace::new_inherited(&transform)),
             global,
             XRReferenceSpaceBinding::Wrap,
         )
     }
 }
+
+impl XRReferenceSpaceMethods for XRReferenceSpace {
+    /// https://immersive-web.github.io/webxr/#dom-xrreferencespace-originoffset
+    fn SetOriginOffset(&self, transform: &XRRigidTransform) {
+        self.transform.set(transform);
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrreferencespace-originoffset
+    fn OriginOffset(&self) -> DomRoot<XRRigidTransform> {
+        self.transform.get()
+    }
+}
diff --git a/components/script/dom/xrrigidtransform.rs b/components/script/dom/xrrigidtransform.rs
index ab8bd6e6e85..3f726475517 100644
--- a/components/script/dom/xrrigidtransform.rs
+++ b/components/script/dom/xrrigidtransform.rs
@@ -45,6 +45,18 @@ impl XRRigidTransform {
         )
     }
 
+    #[allow(unused)]
+    pub fn identity(window: &Window) -> DomRoot<XRRigidTransform> {
+        let global = window.global();
+        let position = DOMPointReadOnly::new(&global, 0., 0., 0., 1.);
+        let orientation = DOMPointReadOnly::new(&global, 0., 0., 0., 1.);
+        reflect_dom_object(
+            Box::new(XRRigidTransform::new_inherited(&position, &orientation)),
+            window,
+            XRRigidTransformBinding::Wrap,
+        )
+    }
+
     // https://immersive-web.github.io/webxr/#dom-xrrigidtransform-xrrigidtransform
     pub fn Constructor(
         window: &Window,
diff --git a/components/script/dom/xrstationaryreferencespace.rs b/components/script/dom/xrstationaryreferencespace.rs
index 92c0dce0196..bfb8b41aeb5 100644
--- a/components/script/dom/xrstationaryreferencespace.rs
+++ b/components/script/dom/xrstationaryreferencespace.rs
@@ -5,8 +5,9 @@
 use crate::dom::bindings::codegen::Bindings::XRStationaryReferenceSpaceBinding;
 use crate::dom::bindings::reflector::reflect_dom_object;
 use crate::dom::bindings::root::DomRoot;
-use crate::dom::globalscope::GlobalScope;
+use crate::dom::window::Window;
 use crate::dom::xrreferencespace::XRReferenceSpace;
+use crate::dom::xrrigidtransform::XRRigidTransform;
 use dom_struct::dom_struct;
 
 #[dom_struct]
@@ -16,16 +17,17 @@ pub struct XRStationaryReferenceSpace {
 
 #[allow(unused)]
 impl XRStationaryReferenceSpace {
-    pub fn new_inherited() -> XRStationaryReferenceSpace {
+    pub fn new_inherited(transform: &XRRigidTransform) -> XRStationaryReferenceSpace {
         XRStationaryReferenceSpace {
-            xrreferencespace: XRReferenceSpace::new_inherited(),
+            xrreferencespace: XRReferenceSpace::new_inherited(transform),
         }
     }
 
-    pub fn new(global: &GlobalScope) -> DomRoot<XRStationaryReferenceSpace> {
+    pub fn new(window: &Window) -> DomRoot<XRStationaryReferenceSpace> {
+        let transform = XRRigidTransform::identity(window);
         reflect_dom_object(
-            Box::new(XRStationaryReferenceSpace::new_inherited()),
-            global,
+            Box::new(XRStationaryReferenceSpace::new_inherited(&transform)),
+            window,
             XRStationaryReferenceSpaceBinding::Wrap,
         )
     }