Filter out webidl files based on special comments, and feature-gate webxr interfaces. (#34348)

* Filter out webidl files based on skip-if directives.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Don't build XR functionality without webxr feature.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Fix tidy.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Adjust imports for file movement.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Fix clippy.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Formatting.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Clean up webxr module import.

Co-authored-by: Samson <16504129+sagudev@users.noreply.github.com>
Signed-off-by: Josh Matthews <josh@joshmatthews.net>

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>
Co-authored-by: Samson <16504129+sagudev@users.noreply.github.com>

components/script/dom/webxr/xrhittestresult.rs

@@ -0,0 +1,54 @@
+/* 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 webxr_api::HitTestResult;
+
+use crate::dom::bindings::codegen::Bindings::XRHitTestResultBinding::XRHitTestResultMethods;
+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::xrframe::XRFrame;
+use crate::dom::xrpose::XRPose;
+use crate::dom::xrspace::XRSpace;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub struct XRHitTestResult {
+    reflector_: Reflector,
+    #[ignore_malloc_size_of = "defined in webxr"]
+    #[no_trace]
+    result: HitTestResult,
+    frame: Dom<XRFrame>,
+}
+
+impl XRHitTestResult {
+    fn new_inherited(result: HitTestResult, frame: &XRFrame) -> XRHitTestResult {
+        XRHitTestResult {
+            reflector_: Reflector::new(),
+            result,
+            frame: Dom::from_ref(frame),
+        }
+    }
+
+    pub fn new(
+        global: &GlobalScope,
+        result: HitTestResult,
+        frame: &XRFrame,
+    ) -> DomRoot<XRHitTestResult> {
+        reflect_dom_object(
+            Box::new(XRHitTestResult::new_inherited(result, frame)),
+            global,
+        )
+    }
+}
+
+impl XRHitTestResultMethods<crate::DomTypeHolder> for XRHitTestResult {
+    // https://immersive-web.github.io/hit-test/#dom-xrhittestresult-getpose
+    fn GetPose(&self, base: &XRSpace, can_gc: CanGc) -> Option<DomRoot<XRPose>> {
+        let base = self.frame.get_pose(base)?;
+        let pose = self.result.space.then(&base.inverse());
+        Some(XRPose::new(&self.global(), pose.cast_unit(), can_gc))
+    }
+}