Handle AddInput/RemoveInput events

1 files changed, 54 insertions, 1 deletions

diff --git a/components/script/dom/xrinputsourcearray.rs b/components/script/dom/xrinputsourcearray.rs
index 48f84991db0..45e0f2851e4 100644
--- a/components/script/dom/xrinputsourcearray.rs
+++ b/components/script/dom/xrinputsourcearray.rs
@@ -5,13 +5,16 @@
 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::inheritance::Castable;
 use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
 use crate::dom::bindings::root::{Dom, DomRoot};
+use crate::dom::event::Event;
 use crate::dom::globalscope::GlobalScope;
 use crate::dom::xrinputsource::XRInputSource;
+use crate::dom::xrinputsourceschangeevent::XRInputSourcesChangeEvent;
 use crate::dom::xrsession::XRSession;
 use dom_struct::dom_struct;
-use webxr_api::InputId;
+use webxr_api::{InputId, InputSource};
 
 #[dom_struct]
 pub struct XRInputSourceArray {
@@ -48,6 +51,56 @@ impl XRInputSourceArray {
         });
     }
 
+    pub fn add_input_source(&self, session: &XRSession, info: InputSource) {
+        let mut input_sources = self.input_sources.borrow_mut();
+        let global = self.global();
+        let input = XRInputSource::new(&global, &session, info);
+        debug_assert!(
+            input_sources.iter().find(|i| i.id() == info.id).is_none(),
+            "Should never add a duplicate input id!"
+        );
+        input_sources.push(Dom::from_ref(&input));
+
+        let added = [input];
+
+        let event = XRInputSourcesChangeEvent::new(
+            &global,
+            atom!("inputsourceschange"),
+            false,
+            true,
+            session,
+            &added,
+            &[],
+        );
+        // Release the refcell guard
+        drop(input_sources);
+        event.upcast::<Event>().fire(session.upcast());
+    }
+
+    pub fn remove_input_source(&self, session: &XRSession, id: InputId) {
+        let mut input_sources = self.input_sources.borrow_mut();
+        let global = self.global();
+        let removed = if let Some(i) = input_sources.iter().find(|i| i.id() == id) {
+            [DomRoot::from_ref(&**i)]
+        } else {
+            return;
+        };
+
+        let event = XRInputSourcesChangeEvent::new(
+            &global,
+            atom!("inputsourceschange"),
+            false,
+            true,
+            session,
+            &[],
+            &removed,
+        );
+        input_sources.retain(|i| i.id() != id);
+        // release the refcell guard
+        drop(input_sources);
+        event.upcast::<Event>().fire(session.upcast());
+    }
+
     pub fn find(&self, id: InputId) -> Option<DomRoot<XRInputSource>> {
         self.input_sources
             .borrow()