LibWeb: Make document.write() work while document is parsing

This necessitated making HTMLParser ref-counted, and having it register
itself with Document when created. That makes it possible for scripts to
add new input at the current parser insertion point.

There is now a reference cycle between Document and HTMLParser. This
cycle is explicitly broken by calling Document::detach_parser() at the
end of HTMLParser::run().

This is a huge progression on ACID3, from 31% to 49%! :^)

1 files changed, 3 insertions, 3 deletions

diff --git a/Tests/LibWeb/test-web.cpp b/Tests/LibWeb/test-web.cpp
index 14819e41c1..a7d9913d3d 100644
--- a/Tests/LibWeb/test-web.cpp
+++ b/Tests/LibWeb/test-web.cpp
@@ -150,10 +150,10 @@ JS_DEFINE_NATIVE_FUNCTION(TestWebGlobalObject::wait_for_page_to_load)
     loader.load_sync(
         request,
         [&](auto data, auto&, auto) {
-            Web::HTML::HTMLParser parser(document, data, "utf-8");
+            auto parser = Web::HTML::HTMLParser::create(document, data, "utf-8");
             // Now parse the HTML page.
-            parser.run(next_page_to_load.value());
-            g_page_view->set_document(&parser.document());
+            parser->run(next_page_to_load.value());
+            g_page_view->set_document(&parser->document());
             // Note: Unhandled exceptions are just dropped here.
 
             // Run the "after" hooks