hyprland/focus_grab: add HyprlandFocusGrab

src/wayland/hyprland/focus_grab/grab.cpp

@@ -0,0 +1,78 @@
+#include "grab.hpp"
+
+#include <private/qwaylandwindow_p.h>
+#include <qobject.h>
+#include <qtmetamacros.h>
+#include <qwindow.h>
+#include <wayland-hyprland-focus-grab-v1-client-protocol.h>
+
+namespace qs::hyprland::focus_grab {
+
+FocusGrab::FocusGrab(::hyprland_focus_grab_v1* grab) { this->init(grab); }
+
+FocusGrab::~FocusGrab() {
+	if (this->isInitialized()) {
+		this->destroy();
+	}
+}
+
+bool FocusGrab::isActive() const { return this->active; }
+
+void FocusGrab::addWindow(QWindow* window) {
+	if (auto* waylandWindow = dynamic_cast<QWaylandWindow*>(window->handle())) {
+		this->addWaylandWindow(waylandWindow);
+	} else {
+		QObject::connect(window, &QWindow::visibleChanged, this, [this, window]() {
+			if (window->isVisible()) {
+				if (window->handle() == nullptr) {
+					window->create();
+				}
+
+				auto* waylandWindow = dynamic_cast<QWaylandWindow*>(window->handle());
+				this->addWaylandWindow(waylandWindow);
+				this->sync();
+			}
+		});
+	}
+}
+
+void FocusGrab::removeWindow(QWindow* window) {
+	QObject::disconnect(window, nullptr, this, nullptr);
+
+	if (auto* waylandWindow = dynamic_cast<QWaylandWindow*>(window->handle())) {
+		this->pendingAdditions.removeAll(waylandWindow);
+		this->remove_surface(waylandWindow->surface());
+		this->commitRequired = true;
+	}
+}
+
+void FocusGrab::addWaylandWindow(QWaylandWindow* window) {
+	this->add_surface(window->surface());
+	this->pendingAdditions.append(window);
+	this->commitRequired = true;
+}
+
+void FocusGrab::sync() {
+	if (this->commitRequired) {
+		this->commit();
+		this->commitRequired = false;
+
+		// the protocol will always send cleared() when the grab is deactivated,
+		// even if it was due to window destruction, so we don't need to track it.
+		if (!this->pendingAdditions.isEmpty()) {
+			this->pendingAdditions.clear();
+
+			if (!this->active) {
+				this->active = true;
+				emit this->activated();
+			}
+		}
+	}
+}
+
+void FocusGrab::hyprland_focus_grab_v1_cleared() {
+	this->active = false;
+	emit this->cleared();
+}
+
+} // namespace qs::hyprland::focus_grab