LibWeb: Add more fast_is<T> helpers for DOM::Node subclasses

Author: https://github.com/awesomekling
Commit: aecb144df0
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4395

Libraries/LibWeb/HTML/HTMLAreaElement.h

@@ -25,6 +25,8 @@ public:
 private:
     HTMLAreaElement(DOM::Document&, DOM::QualifiedName);
 
+    virtual bool is_html_area_element() const override { return true; }
+
     virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
@@ -59,3 +61,8 @@ private:
 };
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLAreaElement>() const { return is_html_area_element(); }
+}

Libraries/LibWeb/HTML/HTMLFieldSetElement.h

@@ -54,7 +54,14 @@ private:
     virtual void initialize(JS::Realm&) override;
     virtual void visit_edges(Cell::Visitor&) override;
 
+    virtual bool is_html_fieldset_element() const override { return true; }
+
     GC::Ptr<DOM::HTMLCollection> m_elements;
 };
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLFieldSetElement>() const { return is_html_fieldset_element(); }
+}

Libraries/LibWeb/HTML/HTMLFrameSetElement.h

@@ -24,6 +24,8 @@ public:
 private:
     HTMLFrameSetElement(DOM::Document&, DOM::QualifiedName);
 
+    virtual bool is_html_frameset_element() const override { return true; }
+
     virtual void adjust_computed_style(CSS::ComputedProperties&) override;
 
     virtual void initialize(JS::Realm&) override;
@@ -37,3 +39,8 @@ private:
 };
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLFrameSetElement>() const { return is_html_frameset_element(); }
+}

Libraries/LibWeb/HTML/HTMLHeadElement.h

@@ -20,7 +20,13 @@ public:
 private:
     HTMLHeadElement(DOM::Document&, DOM::QualifiedName);
 
+    virtual bool is_html_head_element() const final { return true; }
     virtual void initialize(JS::Realm&) override;
 };
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLHeadElement>() const { return is_html_head_element(); }
+}

Libraries/LibWeb/HTML/HTMLIFrameElement.h

@@ -69,3 +69,8 @@ private:
 void run_iframe_load_event_steps(HTML::HTMLIFrameElement&);
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLIFrameElement>() const { return is_html_iframe_element(); }
+}

Libraries/LibWeb/HTML/HTMLMediaElement.h

@@ -182,6 +182,8 @@ protected:
 private:
     friend SourceElementSelector;
 
+    virtual bool is_html_media_element() const final { return true; }
+
     struct EntireResource { };
     using ByteRange = Variant<EntireResource>; // FIXME: This will need to include "until end" and an actual byte range.
 
@@ -324,3 +326,8 @@ private:
 };
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLMediaElement>() const { return is_html_media_element(); }
+}

Libraries/LibWeb/HTML/HTMLTitleElement.h

@@ -23,8 +23,14 @@ public:
 private:
     HTMLTitleElement(DOM::Document&, DOM::QualifiedName);
 
+    virtual bool is_html_title_element() const override { return true; }
     virtual void initialize(JS::Realm&) override;
     virtual void children_changed(ChildrenChangedMetadata const*) override;
 };
 
 }
+
+namespace Web::DOM {
+template<>
+inline bool Node::fast_is<HTML::HTMLTitleElement>() const { return is_html_title_element(); }
+}