wm: add WindowManager module with ext-workspace support

src/windowmanager/windowmanager.hpp

@@ -0,0 +1,91 @@
+#pragma once
+
+#include <functional>
+
+#include <qhash.h>
+#include <qlist.h>
+#include <qobject.h>
+#include <qproperty.h>
+#include <qqmlintegration.h>
+#include <qscreen.h>
+#include <qtmetamacros.h>
+
+#include "../core/qmlscreen.hpp"
+#include "screenprojection.hpp"
+#include "windowset.hpp"
+
+namespace qs::wm {
+
+class WindowManager: public QObject {
+	Q_OBJECT;
+
+public:
+	static void setProvider(std::function<WindowManager*()> provider);
+	static WindowManager* instance();
+
+	Q_INVOKABLE ScreenProjection* screenProjection(QuickshellScreenInfo* screen);
+
+	[[nodiscard]] QBindable<QList<Windowset*>> bindableWindowsets() const {
+		return &this->bWindowsets;
+	}
+
+	[[nodiscard]] QBindable<QList<WindowsetProjection*>> bindableWindowsetProjections() const {
+		return &this->bWindowsetProjections;
+	}
+
+signals:
+	void windowsetsChanged();
+	void windowsetProjectionsChanged();
+
+public:
+	Q_OBJECT_BINDABLE_PROPERTY(
+	    WindowManager,
+	    QList<Windowset*>,
+	    bWindowsets,
+	    &WindowManager::windowsetsChanged
+	);
+
+	Q_OBJECT_BINDABLE_PROPERTY(
+	    WindowManager,
+	    QList<WindowsetProjection*>,
+	    bWindowsetProjections,
+	    &WindowManager::windowsetProjectionsChanged
+	);
+
+private:
+	static std::function<WindowManager*()> provider;
+	QHash<QScreen*, ScreenProjection*> mScreenProjections;
+};
+
+///! Window management interfaces exposed by the window manager.
+class WindowManagerQml: public QObject {
+	Q_OBJECT;
+	QML_NAMED_ELEMENT(WindowManager);
+	QML_SINGLETON;
+	// clang-format off
+	/// All windowsets tracked by the WM across all projections.
+	Q_PROPERTY(QList<Windowset*> windowsets READ default BINDABLE bindableWindowsets);
+	/// All windowset projections tracked by the WM. Does not include
+	/// internal projections from @@screenProjection().
+	Q_PROPERTY(QList<WindowsetProjection*> windowsetProjections READ default BINDABLE bindableWindowsetProjections);
+	// clang-format on
+
+public:
+	/// Returns an internal WindowsetProjection that covers a single screen and contains all
+	/// windowsets on that screen, regardless of the WM-specified projection. Depending on
+	/// how the WM lays out its actual projections, multiple ScreenProjections may contain
+	/// the same Windowsets.
+	Q_INVOKABLE static ScreenProjection* screenProjection(QuickshellScreenInfo* screen) {
+		return WindowManager::instance()->screenProjection(screen);
+	}
+
+	[[nodiscard]] static QBindable<QList<Windowset*>> bindableWindowsets() {
+		return WindowManager::instance()->bindableWindowsets();
+	}
+
+	[[nodiscard]] static QBindable<QList<WindowsetProjection*>> bindableWindowsetProjections() {
+		return WindowManager::instance()->bindableWindowsetProjections();
+	}
+};
+
+} // namespace qs::wm