LibWeb: Start implementing the MediaQueryList interface

Userland/Libraries/LibWeb/CSS/MediaQueryList.h

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <AK/Forward.h>
+#include <AK/RefCounted.h>
+#include <LibWeb/Bindings/Wrappable.h>
+#include <LibWeb/DOM/EventTarget.h>
+#include <LibWeb/Forward.h>
+
+namespace Web::CSS {
+
+// 4.2. The MediaQueryList Interface, https://drafts.csswg.org/cssom-view/#the-mediaquerylist-interface
+class MediaQueryList final
+    : public RefCounted<MediaQueryList>
+    , public DOM::EventTarget
+    , public Bindings::Wrappable {
+
+public:
+    using WrapperType = Bindings::MediaQueryListWrapper;
+
+    using RefCounted::ref;
+    using RefCounted::unref;
+
+    static NonnullRefPtr<MediaQueryList> create(DOM::Document& document, String media)
+    {
+        return adopt_ref(*new MediaQueryList(document, move(media)));
+    }
+
+    virtual ~MediaQueryList() override;
+
+    String media() const;
+    bool matches() const;
+
+    // ^EventTarget
+    virtual void ref_event_target() override { ref(); }
+    virtual void unref_event_target() override { unref(); }
+    virtual bool dispatch_event(NonnullRefPtr<DOM::Event>) override;
+    virtual JS::Object* create_wrapper(JS::GlobalObject&) override;
+
+private:
+    MediaQueryList(DOM::Document&, String);
+
+    DOM::Document& m_document;
+    String m_media;
+};
+
+}
+
+namespace Web::Bindings {
+
+MediaQueryListWrapper* wrap(JS::GlobalObject&, CSS::MediaQueryList&);
+
+}