Properly mark application/xhtml+xml documents as XML

For this to work, we must remove the unimplemented!() call
in Element::parse_fragment because all the tests rely on
setting innerHTML.

components/script/dom/document.rs

@@ -136,7 +136,7 @@ pub enum TouchEventResult {
     Forwarded,
 }
 
-#[derive(JSTraceable, PartialEq, HeapSizeOf)]
+#[derive(Clone, Copy, Debug, HeapSizeOf, JSTraceable, PartialEq)]
 pub enum IsHTMLDocument {
     HTMLDocument,
     NonHTMLDocument,

components/script/dom/element.rs

@@ -1278,12 +1278,8 @@ impl Element {
     pub fn parse_fragment(&self, markup: DOMString) -> Fallible<Root<DocumentFragment>> {
         // Steps 1-2.
         let context_document = document_from_node(self);
-        let new_children = if context_document.is_html_document() {
-            ServoParser::parse_html_fragment(self, markup)
-        } else {
-            // FIXME: XML case
-            unimplemented!()
-        };
+        // TODO(#11995): XML case.
+        let new_children = ServoParser::parse_html_fragment(self, markup);
         // Step 3.
         let fragment = DocumentFragment::new(&context_document);
         // Step 4.

components/script/script_thread.rs

@@ -1751,9 +1751,12 @@ impl ScriptThread {
                                                       Some(incomplete.url.clone()));
 
         let is_html_document = match metadata.content_type {
+            Some(Serde(ContentType(Mime(TopLevel::Application, SubLevel::Ext(ref sub_level), _))))
+                if sub_level.ends_with("+xml") => IsHTMLDocument::NonHTMLDocument,
+
             Some(Serde(ContentType(Mime(TopLevel::Application, SubLevel::Xml, _)))) |
-            Some(Serde(ContentType(Mime(TopLevel::Text, SubLevel::Xml, _)))) =>
-                IsHTMLDocument::NonHTMLDocument,
+            Some(Serde(ContentType(Mime(TopLevel::Text, SubLevel::Xml, _)))) => IsHTMLDocument::NonHTMLDocument,
+
             _ => IsHTMLDocument::HTMLDocument,
         };
 
@@ -1844,17 +1847,7 @@ impl ScriptThread {
 
         document.set_https_state(metadata.https_state);
 
-        let is_xml = match metadata.content_type {
-            Some(Serde(ContentType(Mime(TopLevel::Application, SubLevel::Ext(ref sub_level), _))))
-                if sub_level.ends_with("+xml") => true,
-
-            Some(Serde(ContentType(Mime(TopLevel::Application, SubLevel::Xml, _)))) |
-            Some(Serde(ContentType(Mime(TopLevel::Text, SubLevel::Xml, _)))) => true,
-
-            _ => false,
-        };
-
-        if is_xml {
+        if is_html_document == IsHTMLDocument::NonHTMLDocument {
             ServoParser::parse_xml_document(
                 &document,
                 parse_input,

tests/wpt/metadata/dom/nodes/Document-createElement.html.ini

@@ -3,186 +3,96 @@
   [createElement(undefined) in XML document]
     expected: FAIL
 
-  [createElement(undefined) in XHTML document]
-    expected: FAIL
-
   [createElement(null) in XML document]
     expected: FAIL
 
-  [createElement(null) in XHTML document]
-    expected: FAIL
-
   [createElement("foo") in XML document]
     expected: FAIL
 
-  [createElement("foo") in XHTML document]
-    expected: FAIL
-
   [createElement("f1oo") in XML document]
     expected: FAIL
 
-  [createElement("f1oo") in XHTML document]
-    expected: FAIL
-
   [createElement("foo1") in XML document]
     expected: FAIL
 
-  [createElement("foo1") in XHTML document]
-    expected: FAIL
-
   [createElement("fெ") in XML document]
     expected: FAIL
 
-  [createElement("fெ") in XHTML document]
-    expected: FAIL
-
   [createElement("fooெ") in XML document]
     expected: FAIL
 
-  [createElement("fooெ") in XHTML document]
-    expected: FAIL
-
   [createElement(":") in XML document]
     expected: FAIL
 
   [createElement(":foo") in XML document]
     expected: FAIL
 
-  [createElement(":foo") in XHTML document]
-    expected: FAIL
-
   [createElement("f:oo") in XML document]
     expected: FAIL
 
-  [createElement("f:oo") in XHTML document]
-    expected: FAIL
-
   [createElement("foo:") in XML document]
     expected: FAIL
 
-  [createElement("foo:") in XHTML document]
-    expected: FAIL
-
   [createElement("f:o:o") in XML document]
     expected: FAIL
 
-  [createElement("f:o:o") in XHTML document]
-    expected: FAIL
-
   [createElement("f::oo") in XML document]
     expected: FAIL
 
-  [createElement("f::oo") in XHTML document]
-    expected: FAIL
-
   [createElement("f::oo:") in XML document]
     expected: FAIL
 
-  [createElement("f::oo:") in XHTML document]
-    expected: FAIL
-
   [createElement("foo:0") in XML document]
     expected: FAIL
 
-  [createElement("foo:0") in XHTML document]
-    expected: FAIL
-
   [createElement("foo:_") in XML document]
     expected: FAIL
 
-  [createElement("foo:_") in XHTML document]
-    expected: FAIL
-
   [createElement("foo:ெ") in XML document]
     expected: FAIL
 
-  [createElement("foo:ெ") in XHTML document]
-    expected: FAIL
-
   [createElement("foo:fooெ") in XML document]
     expected: FAIL
 
-  [createElement("foo:fooெ") in XHTML document]
-    expected: FAIL
-
   [createElement("fooெ:foo") in XML document]
     expected: FAIL
 
-  [createElement("fooெ:foo") in XHTML document]
-    expected: FAIL
-
   [createElement("xml") in XML document]
     expected: FAIL
 
-  [createElement("xml") in XHTML document]
-    expected: FAIL
-
   [createElement("xmlns") in XML document]
     expected: FAIL
 
-  [createElement("xmlns") in XHTML document]
-    expected: FAIL
-
   [createElement("xmlfoo") in XML document]
     expected: FAIL
 
-  [createElement("xmlfoo") in XHTML document]
-    expected: FAIL
-
   [createElement("xml:foo") in XML document]
     expected: FAIL
 
-  [createElement("xml:foo") in XHTML document]
-    expected: FAIL
-
   [createElement("xmlns:foo") in XML document]
     expected: FAIL
 
-  [createElement("xmlns:foo") in XHTML document]
-    expected: FAIL
-
   [createElement("xmlfoo:bar") in XML document]
     expected: FAIL
 
-  [createElement("xmlfoo:bar") in XHTML document]
-    expected: FAIL
-
   [createElement("svg") in XML document]
     expected: FAIL
 
-  [createElement("svg") in XHTML document]
-    expected: FAIL
-
   [createElement("math") in XML document]
     expected: FAIL
 
-  [createElement("math") in XHTML document]
-    expected: FAIL
-
   [createElement("FOO") in XML document]
     expected: FAIL
 
-  [createElement("FOO") in XHTML document]
-    expected: FAIL
-
   [createElement("marK") in XML document]
     expected: FAIL
 
-  [createElement("marK") in XHTML document]
-    expected: FAIL
-
   [createElement("İnput") in XML document]
     expected: FAIL
 
-  [createElement("İnput") in XHTML document]
-    expected: FAIL
-
   [createElement("ınput") in XML document]
     expected: FAIL
 
-  [createElement("ınput") in XHTML document]
-    expected: FAIL
-
   [createElement("") in XML document]
     expected: FAIL