LibWeb/DOM: Throw errors from correct realm in Node::move_node()

Author: https://github.com/tcl3
Commit: 57dd85e4ac
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5371
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/shannonbooth ✅

Libraries/LibWeb/DOM/Node.cpp

@@ -1215,33 +1215,35 @@ WebIDL::ExceptionOr<GC::Ref<Node>> Node::clone_node(Document* document, bool sub
 // https://dom.spec.whatwg.org/#move
 WebIDL::ExceptionOr<void> Node::move_node(Node& new_parent, Node* child)
 {
+    auto& realm = new_parent.realm();
+
     // 1. If newParent’s shadow-including root is not the same as node’s shadow-including root, then throw a "HierarchyRequestError" DOMException.
     if (&new_parent.shadow_including_root() != &shadow_including_root())
-        return WebIDL::HierarchyRequestError::create(realm(), "New parent is not in the same shadow tree"_string);
+        return WebIDL::HierarchyRequestError::create(realm, "New parent is not in the same shadow tree"_string);
 
     // NOTE: This has the side effect of ensuring that a move is only performed if newParent’s connected is node’s connected.
 
     // 2. If node is a host-including inclusive ancestor of newParent, then throw a "HierarchyRequestError" DOMException.
     if (is_host_including_inclusive_ancestor_of(new_parent))
-        return WebIDL::HierarchyRequestError::create(realm(), "New parent is an ancestor of this node"_string);
+        return WebIDL::HierarchyRequestError::create(realm, "New parent is an ancestor of this node"_string);
 
     // 3. If child is non-null and its parent is not newParent, then throw a "NotFoundError" DOMException.
     if (child && child->parent() != &new_parent)
-        return WebIDL::NotFoundError::create(realm(), "Child does not belong to the new parent"_string);
+        return WebIDL::NotFoundError::create(realm, "Child does not belong to the new parent"_string);
 
     // 4. If node is not an Element or a CharacterData node, then throw a "HierarchyRequestError" DOMException.
     if (!is<Element>(*this) && !is<CharacterData>(*this))
-        return WebIDL::HierarchyRequestError::create(realm(), "Invalid node type for insertion"_string);
+        return WebIDL::HierarchyRequestError::create(realm, "Invalid node type for insertion"_string);
 
     // 5. If node is a Text node and newParent is a document, then throw a "HierarchyRequestError" DOMException.
     if (is<Text>(*this) && is<Document>(new_parent))
-        return WebIDL::HierarchyRequestError::create(realm(), "Invalid node type for insertion"_string);
+        return WebIDL::HierarchyRequestError::create(realm, "Invalid node type for insertion"_string);
 
     // 6. If newParent is a document, node is an Element node, and either newParent has an element child, child is a doctype,
     //    or child is non-null and a doctype is following child then throw a "HierarchyRequestError" DOMException.
     if (is<Document>(new_parent) && is<Element>(*this)) {
         if (new_parent.has_child_of_type<Element>() || is<DocumentType>(child) || (child && child->has_following_node_of_type_in_tree_order<DocumentType>()))
-            return WebIDL::HierarchyRequestError::create(realm(), "Invalid node type for insertion"_string);
+            return WebIDL::HierarchyRequestError::create(realm, "Invalid node type for insertion"_string);
     }
 
     // 7. Let oldParent be node’s parent.

Tests/LibWeb/Text/expected/wpt-import/dom/nodes/moveBefore/Node-moveBefore.txt

@@ -2,8 +2,7 @@ Harness status: OK
 
 Found 32 tests
 
-31 Pass
+32 Pass
-1 Fail
 Pass	If node is a host-including inclusive ancestor of parent, then throw a HierarchyRequestError DOMException.
 Pass	If node is not a DocumentFragment, DocumentType, Element, Text, ProcessingInstruction, or Comment node, then throw a HierarchyRequestError DOMException.
 Pass	If node is a Text node and parent is a document, then throw a HierarchyRequestError DOMException.
@@ -18,7 +17,7 @@ Pass	Calling moveBefore with second argument missing, or other than Node, null,
 Pass	moveBefore() method does not exist on non-ParentNode Nodes
 Pass	moveBefore() on disconnected parent throws a HierarchyRequestError
 Pass	moveBefore() with disconnected target node throws a HierarchyRequestError
-Fail	moveBefore() on a cross-document target node throws a HierarchyRequestError
+Pass	moveBefore() on a cross-document target node throws a HierarchyRequestError
 Pass	moveBefore() into a Document throws a HierarchyRequestError
 Pass	moveBefore() CharacterData into a Document
 Pass	moveBefore() with node being an inclusive ancestor of parent throws a HierarchyRequestError

Tests/LibWeb/Text/expected/wpt-import/dom/nodes/moveBefore/css-transition-cross-document.txt

@@ -0,0 +1,6 @@
+Harness status: OK
+
+Found 1 tests
+
+1 Pass
+Pass	Moving a transition across documents should reset its state

Tests/LibWeb/Text/expected/wpt-import/dom/nodes/moveBefore/throws-exception.txt

@@ -0,0 +1,6 @@
+Harness status: OK
+
+Found 1 tests
+
+1 Pass
+Pass	moveBefore() on a cross-document target node

Tests/LibWeb/Text/input/wpt-import/dom/nodes/moveBefore/css-transition-cross-document.html

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<title>Node.moveBefore should not preserve CSS transition state when crossing document boundaries</title>
+<script src="../../../resources/testharness.js"></script>
+<script src="../../../resources/testharnessreport.js"></script>
+
+<body>
+  <iframe id="iframe">
+  </iframe>
+  <section id="new-parent">
+  </section>
+  <style id="style">
+    #item {
+      width: 100px;
+      height: 100px;
+      background: green;
+      transition: left 10s;
+      position: absolute;
+      left: 0;
+    }
+
+    section {
+      position: relative;
+    }
+
+    body {
+      margin-left: 0;
+    }
+  </style>
+  <script>
+    promise_test(async t => {
+      const iframe = document.querySelector("#iframe");
+      const style = document.querySelector("#style");
+      iframe.contentDocument.head.append(style.cloneNode(true));
+      const item = iframe.contentDocument.createElement("div");
+      item.id = "item";
+      iframe.contentDocument.body.append(item);
+      assert_equals(item.getBoundingClientRect().x, 0);
+      item.style.left = "400px";
+      await new Promise(resolve => item.addEventListener("transitionstart", resolve));
+
+      // Calling `moveBefore()` on a cross-document element undergoing a
+      // transition does not move the element, nor alter the transition.
+      assert_throws_dom("HIERARCHY_REQUEST_ERR", () => {
+        document.querySelector("#new-parent").moveBefore(item, null);
+      });
+
+      await new Promise(resolve => requestAnimationFrame(() => resolve()));
+      assert_less_than(item.getBoundingClientRect().x, 20);
+    }, "Moving a transition across documents should reset its state");
+  </script>
+</body>

Tests/LibWeb/Text/input/wpt-import/dom/nodes/moveBefore/throws-exception.html

@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<title>moveBefore exception conditions</title>
+<script src="../../../resources/testharness.js"></script>
+<script src="../../../resources/testharnessreport.js"></script>
+<body>
+
+<div></div>
+
+<script>
+test(t => {
+  const iframe = document.createElement('iframe');
+  document.body.append(iframe);
+  const connectedCrossDocChild = iframe.contentDocument.createElement('div');
+  const connectedLocalParent = document.querySelector('div');
+
+  assert_throws_dom("HIERARCHY_REQUEST_ERR", () => {
+    connectedLocalParent.moveBefore(connectedCrossDocChild, null);
+  }, "moveBefore on a cross-document target node throws an exception");
+}, "moveBefore() on a cross-document target node");
+</script>