LibWeb: Implement the SVG title element

Userland/Libraries/LibWeb/SVG/SVGTitleElement.cpp

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/SVG/SVGTitleElement.h>
+
+namespace Web::SVG {
+
+SVGTitleElement::SVGTitleElement(DOM::Document& document, DOM::QualifiedName qualified_name)
+    : SVGElement(document, move(qualified_name))
+{
+}
+
+JS::ThrowCompletionOr<void> SVGTitleElement::initialize(JS::Realm& realm)
+{
+    MUST_OR_THROW_OOM(Base::initialize(realm));
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::SVGTitleElementPrototype>(realm, "SVGTitleElement"));
+
+    return {};
+}
+
+JS::GCPtr<Layout::Node> SVGTitleElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties>)
+{
+    return nullptr;
+}
+
+void SVGTitleElement::children_changed()
+{
+    Base::children_changed();
+
+    auto* page = document().page();
+    if (!page)
+        return;
+    if (document().browsing_context() != &page->top_level_browsing_context())
+        return;
+
+    auto* document_element = document().document_element();
+
+    if (document_element == parent() && is<SVGElement>(document_element))
+        page->client().page_did_change_title(document().title());
+}
+
+}