1 files changed, 28 insertions, 2 deletions
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 41b7441c3bf..b4c99ddfc94 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -61,10 +61,12 @@ use fetch;
 use ipc_channel::ipc::IpcSender;
 use ipc_channel::router::ROUTER;
 use js::jsapi::{JSAutoCompartment, JSContext};
-use js::jsapi::{JS_GC, JS_GetRuntime};
-use js::jsval::UndefinedValue;
+use js::jsapi::{JS_GC, JS_GetRuntime, JSPROP_ENUMERATE};
+use js::jsval::{JSVal, UndefinedValue};
 use js::rust::HandleValue;
+use js::rust::wrappers::JS_DefineProperty;
 use layout_image::fetch_image_for_layout;
+use libc;
 use microtask::MicrotaskQueue;
 use msg::constellation_msg::PipelineId;
 use net_traits::{ResourceThreads, ReferrerPolicy};
@@ -574,6 +576,30 @@ impl WindowMethods for Window {
         self.window_proxy().open(url, target, features)
     }
 
+    #[allow(unsafe_code)]
+    // https://html.spec.whatwg.org/multipage/#dom-opener
+    unsafe fn Opener(&self, cx: *mut JSContext) -> JSVal {
+        self.window_proxy().opener(cx)
+    }
+
+    #[allow(unsafe_code)]
+    // https://html.spec.whatwg.org/multipage/#dom-opener
+    unsafe fn SetOpener(&self, cx: *mut JSContext, value: HandleValue) {
+        // Step 1.
+        if value.is_null() {
+            return self.window_proxy().disown();
+        }
+        // Step 2.
+        let obj = self.reflector().get_jsobject();
+        assert!(JS_DefineProperty(cx,
+                                  obj,
+                                  "opener\0".as_ptr() as *const libc::c_char,
+                                  value,
+                                  JSPROP_ENUMERATE,
+                                  None,
+                                  None));
+    }
+
     // https://html.spec.whatwg.org/multipage/#dom-window-closed
     fn Closed(&self) -> bool {
         self.window_proxy.get()