LibWeb: Add Node.insertBefore(Node node, Node? child)

3 files changed, 15 insertions, 0 deletions

diff --git a/Libraries/LibWeb/DOM/Node.cpp b/Libraries/LibWeb/DOM/Node.cpp
index 4f66b7de38..43bab85987 100644
--- a/Libraries/LibWeb/DOM/Node.cpp
+++ b/Libraries/LibWeb/DOM/Node.cpp
@@ -200,4 +200,16 @@ RefPtr<Node> Node::append_child(NonnullRefPtr<Node> node, bool notify)
     return node;
 }
 
+RefPtr<Node> Node::insert_before(NonnullRefPtr<Node> node, RefPtr<Node> child, bool notify)
+{
+    if (!child)
+        return append_child(move(node), notify);
+    if (child->parent_node() != this) {
+        dbg() << "FIXME: Trying to insert_before() a bogus child";
+        return nullptr;
+    }
+    TreeNode<Node>::insert_before(node, child, notify);
+    return node;
+}
+
 }
diff --git a/Libraries/LibWeb/DOM/Node.h b/Libraries/LibWeb/DOM/Node.h
index 30504abcaf..eab5b49a70 100644
--- a/Libraries/LibWeb/DOM/Node.h
+++ b/Libraries/LibWeb/DOM/Node.h
@@ -83,6 +83,7 @@ public:
     bool is_parent_node() const { return is_element() || is_document() || is_document_fragment(); }
 
     RefPtr<Node> append_child(NonnullRefPtr<Node>, bool notify = true);
+    RefPtr<Node> insert_before(NonnullRefPtr<Node> node, RefPtr<Node> child, bool notify = true);
 
     virtual RefPtr<LayoutNode> create_layout_node(const StyleProperties* parent_style) const;
 
diff --git a/Libraries/LibWeb/DOM/Node.idl b/Libraries/LibWeb/DOM/Node.idl
index 3bb148197d..33c883049d 100644
--- a/Libraries/LibWeb/DOM/Node.idl
+++ b/Libraries/LibWeb/DOM/Node.idl
@@ -9,5 +9,7 @@ interface Node : EventTarget {
     readonly attribute Element? parentElement;
 
     Node appendChild(Node node);
+    Node insertBefore(Node node, Node? child);
+
 }