Implement Range::createContextualFragment

components/script/dom/element.rs

@@ -130,7 +130,6 @@ impl Element {
         create_element(name, prefix, document, creator)
     }
 
-
     pub fn new_inherited(local_name: Atom,
                          namespace: Namespace, prefix: Option<DOMString>,
                          document: &Document) -> Element {

components/script/dom/range.rs

@@ -22,6 +22,9 @@ use dom::bindings::weakref::{WeakRef, WeakRefVec};
 use dom::characterdata::CharacterData;
 use dom::document::Document;
 use dom::documentfragment::DocumentFragment;
+use dom::element::Element;
+use dom::htmlbodyelement::HTMLBodyElement;
+use dom::htmlscriptelement::HTMLScriptElement;
 use dom::node::{Node, UnbindContext};
 use dom::text::Text;
 use heapsize::HeapSizeOf;
@@ -893,6 +896,44 @@ impl RangeMethods for Range {
         // Step 6.
         s
     }
+
+    // https://dvcs.w3.org/hg/innerhtml/raw-file/tip/index.html#extensions-to-the-range-interface
+    fn CreateContextualFragment(&self, fragment: DOMString) -> Fallible<Root<DocumentFragment>> {
+        // Step 1.
+        let node = self.StartContainer();
+        let element = match node.type_id() {
+            NodeTypeId::Document(_) | NodeTypeId::DocumentFragment => None,
+            NodeTypeId::Element(_) => Some(node),
+            NodeTypeId::CharacterData(CharacterDataTypeId::Comment) |
+            NodeTypeId::CharacterData(CharacterDataTypeId::Text) => node.GetParentNode(),
+            NodeTypeId::CharacterData(CharacterDataTypeId::ProcessingInstruction) |
+            NodeTypeId::DocumentType => unreachable!(),
+        };
+
+        // Step 2.
+        let should_create_body = element.as_ref().map_or(true, |elem| {
+            let elem = elem.downcast::<Element>().unwrap();
+            elem.local_name() == &atom!("html") && elem.html_element_in_html_document()
+        });
+        let element: Root<Node> = if should_create_body {
+            Root::upcast(HTMLBodyElement::new(atom!("body"), None, &self.StartContainer().owner_doc()))
+        } else {
+            Root::upcast(element.unwrap())
+        };
+
+        // Step 3.
+        let fragment_node = try!(element.parse_fragment(fragment));
+
+        // Step 4.
+        for node in fragment_node.upcast::<Node>().traverse_preorder() {
+            if let Some(script) = node.downcast::<HTMLScriptElement>() {
+                script.set_already_started(false);
+            }
+        }
+
+        // Step 5.
+        Ok(fragment_node)
+    }
 }
 
 #[derive(JSTraceable)]

components/script/dom/webidls/Range.webidl

@@ -76,9 +76,9 @@ interface Range {
 
 // https://dvcs.w3.org/hg/innerhtml/raw-file/tip/index.html#extensions-to-the-range-interface
 partial interface Range {
-  // [NewObject, Throws]
-  // DocumentFragment createContextualFragment(DOMString fragment);
-};//
+  [NewObject, Throws]
+  DocumentFragment createContextualFragment(DOMString fragment);
+};
 
 // http://dev.w3.org/csswg/cssom-view/#extensions-to-the-range-interface
 partial interface Range {