wayland/toplevel: refactor toplevel output tracking to its own file

src/wayland/output_tracking.hpp

@@ -0,0 +1,34 @@
+#pragma once
+
+#include <qlist.h>
+#include <qobject.h>
+#include <qscreen.h>
+#include <qtmetamacros.h>
+
+struct wl_output;
+
+namespace qs::wayland {
+
+class WlOutputTracker: public QObject {
+	Q_OBJECT;
+
+public:
+	[[nodiscard]] const QList<QScreen*>& screens() const { return this->mScreens; }
+
+signals:
+	void screenAdded(QScreen* screen);
+	void screenRemoved(QScreen* screen);
+
+public slots:
+	void addOutput(::wl_output* output);
+	void removeOutput(::wl_output* output);
+
+private slots:
+	void onQScreenAdded(QScreen* screen);
+
+private:
+	QList<QScreen*> mScreens;
+	QList<::wl_output*> mOutputs;
+};
+
+} // namespace qs::wayland