Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibCore/Notifier.cpp

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2018-2023, Andreas Kling <andreas@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibCore/Event.h>
+#include <LibCore/EventLoop.h>
+#include <LibCore/Notifier.h>
+
+namespace Core {
+
+Notifier::Notifier(int fd, Type type, EventReceiver* parent)
+    : EventReceiver(parent)
+    , m_fd(fd)
+    , m_type(type)
+{
+    set_enabled(true);
+}
+
+Notifier::~Notifier()
+{
+    set_enabled(false);
+}
+
+void Notifier::set_enabled(bool enabled)
+{
+    if (m_fd < 0)
+        return;
+    if (enabled == m_is_enabled)
+        return;
+    m_is_enabled = enabled;
+    if (enabled)
+        Core::EventLoop::register_notifier({}, *this);
+    else
+        Core::EventLoop::unregister_notifier({}, *this);
+}
+
+void Notifier::close()
+{
+    if (m_fd < 0)
+        return;
+    set_enabled(false);
+    m_fd = -1;
+}
+
+void Notifier::set_type(Type type)
+{
+    if (m_is_enabled) {
+        // FIXME: Directly communicate intent to the EventLoop.
+        set_enabled(false);
+        m_type = type;
+        set_enabled(true);
+    } else {
+        m_type = type;
+    }
+}
+
+void Notifier::event(Core::Event& event)
+{
+    if (event.type() == Core::Event::NotifierActivation) {
+        if (on_activation)
+            on_activation();
+        return;
+    }
+    EventReceiver::event(event);
+}
+
+}