Add XRFrame::getHitTestResults()

components/script/dom/webidls/XRFrame.webidl

@@ -10,5 +10,5 @@ interface XRFrame {
 
   [Throws] XRViewerPose? getViewerPose(XRReferenceSpace referenceSpace);
   [Throws] XRPose? getPose(XRSpace space, XRSpace relativeTo);
-  // XRInputPose? getInputPose(XRInputSource inputSource, optional XRReferenceSpace referenceSpace);
+  sequence<XRHitTestResult> getHitTestResults(XRHitTestSource hitTestSource);
 };

components/script/dom/xrframe.rs

@@ -8,6 +8,8 @@ use crate::dom::bindings::inheritance::Castable;
 use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
 use crate::dom::bindings::root::{Dom, DomRoot};
 use crate::dom::globalscope::GlobalScope;
+use crate::dom::xrhittestresult::XRHitTestResult;
+use crate::dom::xrhittestsource::XRHitTestSource;
 use crate::dom::xrpose::XRPose;
 use crate::dom::xrreferencespace::XRReferenceSpace;
 use crate::dom::xrsession::{ApiPose, XRSession};
@@ -109,4 +111,14 @@ impl XRFrameMethods for XRFrame {
         let pose = relative_to.inverse().pre_transform(&space);
         Ok(Some(XRPose::new(&self.global(), pose)))
     }
+
+    /// https://immersive-web.github.io/hit-test/#dom-xrframe-gethittestresults
+    fn GetHitTestResults(&self, source: &XRHitTestSource) -> Vec<DomRoot<XRHitTestResult>> {
+        self.data
+            .hit_test_results
+            .iter()
+            .filter(|r| r.id == source.id())
+            .map(|r| XRHitTestResult::new(&self.global(), *r, self))
+            .collect()
+    }
 }

components/script/dom/xrhittestsource.rs

@@ -37,6 +37,10 @@ impl XRHitTestSource {
             global,
         )
     }
+
+    pub fn id(&self) -> HitTestId {
+        self.id
+    }
 }
 
 impl XRHitTestSourceMethods for XRHitTestSource {