1 files changed, 73 insertions, 0 deletions
diff --git a/components/script/dom/xrinputsourcearray.rs b/components/script/dom/xrinputsourcearray.rs
new file mode 100644
index 00000000000..48f84991db0
--- /dev/null
+++ b/components/script/dom/xrinputsourcearray.rs
@@ -0,0 +1,73 @@
+/* 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 crate::dom::bindings::cell::DomRefCell;
+use crate::dom::bindings::codegen::Bindings::XRInputSourceArrayBinding;
+use crate::dom::bindings::codegen::Bindings::XRInputSourceArrayBinding::XRInputSourceArrayMethods;
+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::xrinputsource::XRInputSource;
+use crate::dom::xrsession::XRSession;
+use dom_struct::dom_struct;
+use webxr_api::InputId;
+
+#[dom_struct]
+pub struct XRInputSourceArray {
+    reflector_: Reflector,
+    input_sources: DomRefCell<Vec<Dom<XRInputSource>>>,
+}
+
+impl XRInputSourceArray {
+    fn new_inherited() -> XRInputSourceArray {
+        XRInputSourceArray {
+            reflector_: Reflector::new(),
+            input_sources: DomRefCell::new(vec![]),
+        }
+    }
+
+    pub fn new(global: &GlobalScope) -> DomRoot<XRInputSourceArray> {
+        reflect_dom_object(
+            Box::new(XRInputSourceArray::new_inherited()),
+            global,
+            XRInputSourceArrayBinding::Wrap,
+        )
+    }
+
+    pub fn set_initial_inputs(&self, session: &XRSession) {
+        let mut input_sources = self.input_sources.borrow_mut();
+        let global = self.global();
+        session.with_session(|sess| {
+            for info in sess.initial_inputs() {
+                // XXXManishearth we should be able to listen for updates
+                // to the input sources
+                let input = XRInputSource::new(&global, &session, *info);
+                input_sources.push(Dom::from_ref(&input));
+            }
+        });
+    }
+
+    pub fn find(&self, id: InputId) -> Option<DomRoot<XRInputSource>> {
+        self.input_sources
+            .borrow()
+            .iter()
+            .find(|x| x.id() == id)
+            .map(|x| DomRoot::from_ref(&**x))
+    }
+}
+
+impl XRInputSourceArrayMethods for XRInputSourceArray {
+    /// https://immersive-web.github.io/webxr/#dom-xrinputsourcearray-length
+    fn Length(&self) -> u32 {
+        self.input_sources.borrow().len() as u32
+    }
+
+    /// https://immersive-web.github.io/webxr/#xrinputsourcearray
+    fn IndexedGetter(&self, n: u32) -> Option<DomRoot<XRInputSource>> {
+        self.input_sources
+            .borrow()
+            .get(n as usize)
+            .map(|x| DomRoot::from_ref(&**x))
+    }
+}