Implement DOMPoint and DOMPointReadOnly

Passes some but not all WPT tests. One failure is caused by an issue in codegen for the `DOMPointInit` dictionary, the others by outdated tests: Gecko implements an old version of the spec that overloaded the `DOMPoint` constructor to optionally take an object as the first argument, and made `DOMPointReadOnly` non-constructible.

components/script/dom/dompoint.rs

@@ -0,0 +1,69 @@
+/* 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::DOMPointBinding::{DOMPointMethods, Wrap};
+use dom::bindings::codegen::Bindings::DOMPointReadOnlyBinding::DOMPointReadOnlyMethods;
+use dom::bindings::error::Fallible;
+use dom::bindings::global::GlobalRef;
+use dom::bindings::js::Root;
+use dom::bindings::utils::reflect_dom_object;
+use dom::dompointreadonly::{DOMPointReadOnly, DOMPointWriteMethods};
+
+// http://dev.w3.org/fxtf/geometry/Overview.html#dompoint
+#[dom_struct]
+pub struct DOMPoint {
+    point: DOMPointReadOnly
+}
+
+impl DOMPoint {
+    fn new_inherited(x: f64, y: f64, z: f64, w: f64) -> DOMPoint {
+        DOMPoint {
+            point: DOMPointReadOnly::new_inherited(x, y, z, w),
+        }
+    }
+
+    pub fn new(global: GlobalRef, x: f64, y: f64, z: f64, w: f64) -> Root<DOMPoint> {
+        reflect_dom_object(box DOMPoint::new_inherited(x, y, z, w), global, Wrap)
+    }
+
+    pub fn Constructor(global: GlobalRef,
+                        x: f64, y: f64, z: f64, w: f64) -> Fallible<Root<DOMPoint>> {
+        Ok(DOMPoint::new(global, x, y, z, w))
+    }
+}
+
+impl<'a> DOMPointMethods for &'a DOMPoint {
+    // http://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-x
+    fn X(self) -> f64 {
+        self.point.X()
+    }
+    fn SetX(self, value: f64) {
+        self.point.SetX(value);
+    }
+
+    // http://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-y
+    fn Y(self) -> f64 {
+        self.point.Y()
+    }
+    fn SetY(self, value: f64) {
+        self.point.SetY(value);
+    }
+
+    // http://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-z
+    fn Z(self) -> f64 {
+        self.point.Z()
+    }
+    fn SetZ(self, value: f64) {
+        self.point.SetZ(value);
+    }
+
+    // http://dev.w3.org/fxtf/geometry/Overview.html#dom-dompointreadonly-w
+    fn W(self) -> f64 {
+        self.point.W()
+    }
+    fn SetW(self, value: f64) {
+        self.point.SetW(value);
+    }
+}
+