1 files changed, 100 insertions, 0 deletions
diff --git a/components/script/dom/xrsession.rs b/components/script/dom/xrsession.rs
new file mode 100644
index 00000000000..449d4acf8fc
--- /dev/null
+++ b/components/script/dom/xrsession.rs
@@ -0,0 +1,100 @@
+/* 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::codegen::Bindings::VRDisplayBinding::VRDisplayMethods;
+use crate::dom::bindings::codegen::Bindings::XRBinding::XRSessionMode;
+use crate::dom::bindings::codegen::Bindings::XRSessionBinding;
+use crate::dom::bindings::codegen::Bindings::XRSessionBinding::XRFrameRequestCallback;
+use crate::dom::bindings::codegen::Bindings::XRSessionBinding::XRSessionMethods;
+use crate::dom::bindings::codegen::Bindings::XRWebGLLayerBinding::XRWebGLLayerMethods;
+use crate::dom::bindings::inheritance::Castable;
+use crate::dom::bindings::num::Finite;
+use crate::dom::bindings::reflector::reflect_dom_object;
+use crate::dom::bindings::root::{Dom, DomRoot, MutNullableDom};
+use crate::dom::eventtarget::EventTarget;
+use crate::dom::globalscope::GlobalScope;
+use crate::dom::vrdisplay::VRDisplay;
+use crate::dom::xrlayer::XRLayer;
+use crate::dom::xrwebgllayer::XRWebGLLayer;
+use dom_struct::dom_struct;
+use std::rc::Rc;
+
+#[dom_struct]
+pub struct XRSession {
+    eventtarget: EventTarget,
+    display: Dom<VRDisplay>,
+    base_layer: MutNullableDom<XRLayer>,
+}
+
+impl XRSession {
+    fn new_inherited(display: &VRDisplay) -> XRSession {
+        XRSession {
+            eventtarget: EventTarget::new_inherited(),
+            display: Dom::from_ref(display),
+            base_layer: Default::default(),
+        }
+    }
+
+    pub fn new(global: &GlobalScope, display: &VRDisplay) -> DomRoot<XRSession> {
+        reflect_dom_object(
+            Box::new(XRSession::new_inherited(display)),
+            global,
+            XRSessionBinding::Wrap,
+        )
+    }
+}
+
+impl XRSessionMethods for XRSession {
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-depthnear
+    fn DepthNear(&self) -> Finite<f64> {
+        self.display.DepthNear()
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-depthfar
+    fn DepthFar(&self) -> Finite<f64> {
+        self.display.DepthFar()
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-depthnear
+    fn SetDepthNear(&self, d: Finite<f64>) {
+        self.display.SetDepthNear(d)
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-depthfar
+    fn SetDepthFar(&self, d: Finite<f64>) {
+        self.display.SetDepthFar(d)
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-mode
+    fn Mode(&self) -> XRSessionMode {
+        XRSessionMode::Immersive_vr
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-baselayer
+    fn SetBaseLayer(&self, layer: Option<&XRLayer>) {
+        self.base_layer.set(layer);
+        if let Some(layer) = layer {
+            let layer = layer.downcast::<XRWebGLLayer>().unwrap();
+            self.display.xr_present(&self, &layer.Context());
+        } else {
+            // steps unknown
+            // https://github.com/immersive-web/webxr/issues/453
+        }
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-baselayer
+    fn GetBaseLayer(&self) -> Option<DomRoot<XRLayer>> {
+        self.base_layer.get()
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-requestanimationframe
+    fn RequestAnimationFrame(&self, callback: Rc<XRFrameRequestCallback>) -> i32 {
+        self.display.xr_raf(callback) as i32
+    }
+
+    /// https://immersive-web.github.io/webxr/#dom-xrsession-cancelanimationframe
+    fn CancelAnimationFrame(&self, frame: i32) {
+        self.display.xr_cancel_raf(frame)
+    }
+}