Add bindings for TouchEvent DOM interfaces

components/script/dom/touchlist.rs

@@ -0,0 +1,50 @@
+/* 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::TouchListBinding;
+use dom::bindings::codegen::Bindings::TouchListBinding::TouchListMethods;
+use dom::bindings::global::GlobalRef;
+use dom::bindings::js::{JS, Root};
+use dom::bindings::utils::{Reflector, reflect_dom_object};
+use dom::touch::Touch;
+use dom::window::Window;
+
+#[dom_struct]
+pub struct TouchList {
+    reflector_: Reflector,
+    touches: Vec<JS<Touch>>,
+}
+
+impl TouchList {
+    fn new_inherited(touches: &[&Touch]) -> TouchList {
+        TouchList {
+            reflector_: Reflector::new(),
+            touches: touches.iter().map(|touch| JS::from_ref(*touch)).collect(),
+        }
+    }
+
+    pub fn new(window: &Window, touches: &[&Touch]) -> Root<TouchList> {
+        reflect_dom_object(box TouchList::new_inherited(touches),
+                           GlobalRef::Window(window), TouchListBinding::Wrap)
+    }
+}
+
+impl TouchListMethods for TouchList {
+    /// https://w3c.github.io/touch-events/#widl-TouchList-length
+    fn Length(&self) -> u32 {
+        self.touches.len() as u32
+    }
+
+    /// https://w3c.github.io/touch-events/#widl-TouchList-item-getter-Touch-unsigned-long-index
+    fn Item(&self, index: u32) -> Option<Root<Touch>> {
+        self.touches.get(index as usize).map(JS::root)
+    }
+
+    /// https://w3c.github.io/touch-events/#widl-TouchList-item-getter-Touch-unsigned-long-index
+    fn IndexedGetter(&self, index: u32, found: &mut bool) -> Option<Root<Touch>> {
+        let item = self.Item(index);
+        *found = item.is_some();
+        item
+    }
+}