WebVR API Implementation, r=larsbergstrom

components/script/dom/vrdisplaycapabilities.rs

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+/* 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 http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::cell::DOMRefCell;
+use dom::bindings::codegen::Bindings::VRDisplayCapabilitiesBinding;
+use dom::bindings::codegen::Bindings::VRDisplayCapabilitiesBinding::VRDisplayCapabilitiesMethods;
+use dom::bindings::js::Root;
+use dom::bindings::reflector::{Reflector, reflect_dom_object};
+use dom::globalscope::GlobalScope;
+use webvr_traits::WebVRDisplayCapabilities;
+
+#[dom_struct]
+pub struct VRDisplayCapabilities {
+    reflector_: Reflector,
+    #[ignore_heap_size_of = "Defined in rust-webvr"]
+    capabilities: DOMRefCell<WebVRDisplayCapabilities>
+}
+
+unsafe_no_jsmanaged_fields!(WebVRDisplayCapabilities);
+
+impl VRDisplayCapabilities {
+    fn new_inherited(capabilities: WebVRDisplayCapabilities) -> VRDisplayCapabilities {
+        VRDisplayCapabilities {
+            reflector_: Reflector::new(),
+            capabilities: DOMRefCell::new(capabilities)
+        }
+    }
+
+    pub fn new(capabilities: WebVRDisplayCapabilities, global: &GlobalScope) -> Root<VRDisplayCapabilities> {
+        reflect_dom_object(box VRDisplayCapabilities::new_inherited(capabilities),
+                           global,
+                           VRDisplayCapabilitiesBinding::Wrap)
+    }
+}
+
+impl VRDisplayCapabilitiesMethods for VRDisplayCapabilities {
+    // https://w3c.github.io/webvr/#dom-vrdisplaycapabilities-hasposition
+    fn HasPosition(&self) -> bool {
+        self.capabilities.borrow().has_position
+    }
+
+    // https://w3c.github.io/webvr/#dom-vrdisplaycapabilities-hasorientation
+    fn HasOrientation(&self) -> bool {
+        self.capabilities.borrow().has_orientation
+    }
+
+    // https://w3c.github.io/webvr/#dom-vrdisplaycapabilities-hasexternaldisplay
+    fn HasExternalDisplay(&self) -> bool {
+        self.capabilities.borrow().has_external_display
+    }
+
+    // https://w3c.github.io/webvr/#dom-vrdisplaycapabilities-canpresent
+    fn CanPresent(&self) -> bool {
+        self.capabilities.borrow().can_present
+    }
+
+    // https://w3c.github.io/webvr/#dom-vrdisplaycapabilities-maxlayers
+    fn MaxLayers(&self) -> u32 {
+        if self.CanPresent() { 1 } else { 0 }
+    }
+}