LibWeb: Create XML Documents in DOMParser.parseFromString

Author: https://github.com/shannonbooth
Commit: a545935997
Pull-request: https://github.com/SerenityOS/serenity/pull/22567
Reviewed-by: https://github.com/awesomekling

Tests/LibWeb/Text/expected/DOM/DOMParser-xml-document.txt

@@ -0,0 +1 @@
+XMLDocument

Tests/LibWeb/Text/input/DOM/DOMParser-xml-document.html

@@ -0,0 +1,8 @@
+<script src="../include.js"></script>
+<script>
+    test(() => {
+        const parser = new DOMParser();
+        const xmlDoc = parser.parseFromString('<svg></svg>', "text/xml");
+        println(xmlDoc.constructor.name);
+    });
+</script>

Userland/Libraries/LibWeb/HTML/DOMParser.cpp

@@ -6,6 +6,7 @@
 
 #include <LibWeb/Bindings/DOMParserPrototype.h>
 #include <LibWeb/Bindings/MainThreadVM.h>
+#include <LibWeb/DOM/XMLDocument.h>
 #include <LibWeb/HTML/DOMParser.h>
 #include <LibWeb/HTML/HTMLDocument.h>
 #include <LibWeb/HTML/Parser/HTMLParser.h>
@@ -59,7 +60,7 @@ JS::NonnullGCPtr<DOM::Document> DOMParser::parse_from_string(StringView string,
         parser->run("about:blank"sv);
     } else {
         // -> Otherwise
-        document = DOM::Document::create(realm(), verify_cast<HTML::Window>(relevant_global_object(*this)).associated_document().url());
+        document = DOM::XMLDocument::create(realm(), verify_cast<HTML::Window>(relevant_global_object(*this)).associated_document().url());
         document->set_content_type(Bindings::idl_enum_to_string(type));
 
         // 1. Create an XML parser parse, associated with document, and with XML scripting support disabled.