Bind/unbind shadow host children to/from tree

1 files changed, 20 insertions, 0 deletions

diff --git a/components/script/dom/element.rs b/components/script/dom/element.rs
index 5d23400e745..dac2d29e51f 100644
--- a/components/script/dom/element.rs
+++ b/components/script/dom/element.rs
@@ -2784,6 +2784,16 @@ impl VirtualMethods for Element {
             return;
         }
 
+        if self.is_shadow_host() {
+            let shadow_root = self.shadow_root.get().unwrap();
+            let shadow_root = shadow_root.upcast::<Node>();
+            shadow_root.set_flag(NodeFlags::IS_CONNECTED, tree_connected);
+            for node in shadow_root.children() {
+                node.set_flag(NodeFlags::IS_CONNECTED, tree_connected);
+                node.bind_to_tree(tree_connected);
+            }
+        }
+
         let doc = document_from_node(self);
         if let Some(ref value) = *self.id_attribute.borrow() {
             doc.register_named_element(self, value.clone());
@@ -2803,6 +2813,16 @@ impl VirtualMethods for Element {
             return;
         }
 
+        if self.is_shadow_host() {
+            let shadow_root = self.shadow_root.get().unwrap();
+            let shadow_root = shadow_root.upcast::<Node>();
+            shadow_root.set_flag(NodeFlags::IS_CONNECTED, false);
+            for node in shadow_root.children() {
+                node.set_flag(NodeFlags::IS_CONNECTED, false);
+                node.unbind_from_tree(context);
+            }
+        }
+
         let doc = document_from_node(self);
         let fullscreen = doc.GetFullscreenElement();
         if fullscreen.deref() == Some(self) {