Everywhere: Hoist the Libraries folder to the top-level

Libraries/LibWeb/CSS/MediaQueryList.cpp

@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/Bindings/MediaQueryListPrototype.h>
+#include <LibWeb/CSS/MediaQueryList.h>
+#include <LibWeb/DOM/Document.h>
+#include <LibWeb/DOM/EventDispatcher.h>
+#include <LibWeb/DOM/IDLEventListener.h>
+#include <LibWeb/HTML/EventHandler.h>
+
+namespace Web::CSS {
+
+JS_DEFINE_ALLOCATOR(MediaQueryList);
+
+JS::NonnullGCPtr<MediaQueryList> MediaQueryList::create(DOM::Document& document, Vector<NonnullRefPtr<MediaQuery>>&& media)
+{
+    return document.heap().allocate<MediaQueryList>(document.realm(), document, move(media));
+}
+
+MediaQueryList::MediaQueryList(DOM::Document& document, Vector<NonnullRefPtr<MediaQuery>>&& media)
+    : DOM::EventTarget(document.realm())
+    , m_document(document)
+    , m_media(move(media))
+{
+    evaluate();
+}
+
+void MediaQueryList::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(MediaQueryList);
+}
+
+void MediaQueryList::visit_edges(Cell::Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+    visitor.visit(m_document);
+}
+
+// https://drafts.csswg.org/cssom-view/#dom-mediaquerylist-media
+String MediaQueryList::media() const
+{
+    return serialize_a_media_query_list(m_media);
+}
+
+// https://drafts.csswg.org/cssom-view/#dom-mediaquerylist-matches
+bool MediaQueryList::matches() const
+{
+    if (m_media.is_empty())
+        return true;
+
+    for (auto& media : m_media) {
+        if (media->matches())
+            return true;
+    }
+
+    return false;
+}
+
+bool MediaQueryList::evaluate()
+{
+    auto window = m_document->window();
+    if (!window)
+        return false;
+
+    if (m_media.is_empty())
+        return true;
+
+    bool now_matches = false;
+    for (auto& media : m_media) {
+        now_matches = now_matches || media->evaluate(*window);
+    }
+
+    return now_matches;
+}
+
+// https://www.w3.org/TR/cssom-view/#dom-mediaquerylist-addlistener
+void MediaQueryList::add_listener(DOM::IDLEventListener* listener)
+{
+    // 1. If listener is null, terminate these steps.
+    if (!listener)
+        return;
+
+    // 2. Append an event listener to the associated list of event listeners with type set to change,
+    //    callback set to listener, and capture set to false, unless there already is an event listener
+    //    in that list with the same type, callback, and capture.
+    //    (NOTE: capture is set to false by default)
+    add_event_listener_without_options(HTML::EventNames::change, *listener);
+}
+
+// https://www.w3.org/TR/cssom-view/#dom-mediaquerylist-removelistener
+void MediaQueryList::remove_listener(DOM::IDLEventListener* listener)
+{
+    // 1. Remove an event listener from the associated list of event listeners, whose type is change, callback is listener, and capture is false.
+    // NOTE: While the spec doesn't technically use remove_event_listener and instead manipulates the list directly, every major engine uses remove_event_listener.
+    //       This means if an event listener removes another event listener that comes after it, the removed event listener will not be invoked.
+    remove_event_listener_without_options(HTML::EventNames::change, *listener);
+}
+
+void MediaQueryList::set_onchange(WebIDL::CallbackType* event_handler)
+{
+    set_event_handler_attribute(HTML::EventNames::change, event_handler);
+}
+
+WebIDL::CallbackType* MediaQueryList::onchange()
+{
+    return event_handler_attribute(HTML::EventNames::change);
+}
+
+}