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/xrpose.rs

@@ -0,0 +1,65 @@
+/* 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 crate::dom::bindings::codegen::Bindings::XRPoseBinding::XRPoseMethods;
+use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
+use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::dompointreadonly::DOMPointReadOnly;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::xrrigidtransform::XRRigidTransform;
+use crate::dom::xrsession::ApiRigidTransform;
+use crate::script_runtime::CanGc;
+
+#[dom_struct]
+pub struct XRPose {
+    reflector_: Reflector,
+    transform: Dom<XRRigidTransform>,
+}
+
+impl XRPose {
+    pub fn new_inherited(transform: &XRRigidTransform) -> XRPose {
+        XRPose {
+            reflector_: Reflector::new(),
+            transform: Dom::from_ref(transform),
+        }
+    }
+
+    #[allow(unused)]
+    pub fn new(
+        global: &GlobalScope,
+        transform: ApiRigidTransform,
+        can_gc: CanGc,
+    ) -> DomRoot<XRPose> {
+        let transform = XRRigidTransform::new(global, transform, can_gc);
+        reflect_dom_object(Box::new(XRPose::new_inherited(&transform)), global)
+    }
+}
+
+impl XRPoseMethods<crate::DomTypeHolder> for XRPose {
+    /// <https://immersive-web.github.io/webxr/#dom-xrpose-transform>
+    fn Transform(&self) -> DomRoot<XRRigidTransform> {
+        DomRoot::from_ref(&self.transform)
+    }
+
+    /// <https://www.w3.org/TR/webxr/#dom-xrpose-linearvelocity>
+    fn GetLinearVelocity(&self) -> Option<DomRoot<DOMPointReadOnly>> {
+        // TODO: Expose from webxr crate
+        None
+    }
+
+    /// <https://www.w3.org/TR/webxr/#dom-xrpose-angularvelocity>
+    fn GetAngularVelocity(&self) -> Option<DomRoot<DOMPointReadOnly>> {
+        // TODO: Expose from webxr crate
+        None
+    }
+
+    /// <https://www.w3.org/TR/webxr/#dom-xrpose-emulatedposition>
+    fn EmulatedPosition(&self) -> bool {
+        // There are currently no instances in which we would need to rely
+        // on emulation for reporting pose, so return false.
+        false
+    }
+}