1 files changed, 19 insertions, 0 deletions
diff --git a/components/script/dom/htmlsourceelement.rs b/components/script/dom/htmlsourceelement.rs
index 84adbc16548..865b21d6acb 100644
--- a/components/script/dom/htmlsourceelement.rs
+++ b/components/script/dom/htmlsourceelement.rs
@@ -3,10 +3,14 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::codegen::Bindings::HTMLSourceElementBinding;
+use dom::bindings::codegen::Bindings::NodeBinding::NodeBinding::NodeMethods;
+use dom::bindings::inheritance::Castable;
 use dom::bindings::js::Root;
 use dom::document::Document;
 use dom::htmlelement::HTMLElement;
+use dom::htmlmediaelement::HTMLMediaElement;
 use dom::node::Node;
+use dom::virtualmethods::VirtualMethods;
 use dom_struct::dom_struct;
 use html5ever::{LocalName, Prefix};
 
@@ -34,3 +38,18 @@ impl HTMLSourceElement {
                            HTMLSourceElementBinding::Wrap)
     }
 }
+
+impl VirtualMethods for HTMLSourceElement {
+    fn super_type(&self) -> Option<&VirtualMethods> {
+        Some(self.upcast::<HTMLElement>() as &VirtualMethods)
+    }
+
+    /// https://html.spec.whatwg.org/multipage/#the-source-element:nodes-are-inserted
+    fn bind_to_tree(&self, tree_in_doc: bool) {
+        self.super_type().unwrap().bind_to_tree(tree_in_doc);
+        let parent = self.upcast::<Node>().GetParentNode().unwrap();
+        if let Some(media) = parent.downcast::<HTMLMediaElement>() {
+            media.handle_source_child_insertion();
+        }
+    }
+}