Implement Gamepad API

components/script/dom/gamepadbutton.rs

@@ -0,0 +1,61 @@
+/* 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::codegen::Bindings::GamepadButtonBinding;
+use dom::bindings::codegen::Bindings::GamepadButtonBinding::GamepadButtonMethods;
+use dom::bindings::js::Root;
+use dom::bindings::num::Finite;
+use dom::bindings::reflector::{Reflector, reflect_dom_object};
+use dom::globalscope::GlobalScope;
+use dom_struct::dom_struct;
+use std::cell::Cell;
+
+#[dom_struct]
+pub struct GamepadButton {
+    reflector_: Reflector,
+    pressed: Cell<bool>,
+    touched: Cell<bool>,
+    value: Cell<f64>,
+}
+
+impl GamepadButton {
+    pub fn new_inherited(pressed: bool, touched: bool) -> GamepadButton {
+        Self {
+            reflector_: Reflector::new(),
+            pressed: Cell::new(pressed),
+            touched: Cell::new(touched),
+            value: Cell::new(0.0),
+        }
+    }
+
+    pub fn new(global: &GlobalScope, pressed: bool, touched: bool) -> Root<GamepadButton> {
+        reflect_dom_object(box GamepadButton::new_inherited(pressed, touched),
+                           global,
+                           GamepadButtonBinding::Wrap)
+    }
+}
+
+impl GamepadButtonMethods for GamepadButton {
+    // https://www.w3.org/TR/gamepad/#widl-GamepadButton-pressed
+    fn Pressed(&self) -> bool {
+        self.pressed.get()
+    }
+
+    // https://www.w3.org/TR/gamepad/#widl-GamepadButton-touched
+    fn Touched(&self) -> bool {
+        self.touched.get()
+    }
+
+    // https://www.w3.org/TR/gamepad/#widl-GamepadButton-value
+    fn Value(&self) -> Finite<f64> {
+        Finite::wrap(self.value.get())
+    }
+}
+
+impl GamepadButton {
+    pub fn update(&self, pressed: bool, touched: bool) {
+        self.pressed.set(pressed);
+        self.touched.set(touched);
+    }
+}