Plugins/ZShell/CMakeLists.txt

@@ -45,11 +45,13 @@ qml_module(ZShell
 		requests.hpp requests.cpp
 		toaster.hpp toaster.cpp
 		qalculator.hpp qalculator.cpp
+		lidwatcher.hpp lidwatcher.cpp
     LIBRARIES
         Qt::Gui
         Qt::Quick
         Qt::Concurrent
         Qt::Sql
+		Qt::DBus
 		PkgConfig::Qalculate
 )
 

Plugins/ZShell/lidwatcher.cpp

@@ -0,0 +1,49 @@
+#include "lidwatcher.hpp"
+
+#include <QtDBus/QDBusConnection>
+#include <QLoggingCategory>
+
+Q_LOGGING_CATEGORY(lcLidWatcher, "ZShell.lidwatcher", QtInfoMsg)
+
+namespace ZShell {
+
+static constexpr auto kLogin1Service = "org.freedesktop.login1";
+static constexpr auto kLogin1Path = "/org/freedesktop/login1";
+static constexpr auto kLogin1Interface = "org.freedesktop.login1.Manager";
+static constexpr auto kPrepareForSleep = "PrepareForSleep";
+
+LidWatcher::LidWatcher(QObject* parent)
+	: QObject(parent)
+	, m_available(false) {
+	QDBusConnection bus = QDBusConnection::systemBus();
+	m_available = bus.isConnected();
+
+	if (!m_available) {
+		qCWarning(lcLidWatcher) << "system bus unavailable";
+		emit availableChanged();
+		return;
+	}
+
+	const auto ok = bus.connect(kLogin1Service, kLogin1Path, kLogin1Interface, kPrepareForSleep, this,
+	                            SLOT(onPrepareForSleep(bool)));
+
+	m_available = ok;
+	emit availableChanged();
+	if (!m_available) {
+		qCWarning(lcLidWatcher) << "login1 lid signal unavailable";
+	}
+}
+
+bool LidWatcher::available() const {
+	return m_available;
+}
+
+void LidWatcher::onPrepareForSleep(bool goingDown) {
+	if (goingDown) {
+		emit lidClosing();
+	} else {
+		emit lidOpened();
+	}
+}
+
+} // namespace ZShell

Plugins/ZShell/lidwatcher.hpp

@@ -0,0 +1,32 @@
+#pragma once
+
+#include <QObject>
+#include <qqmlintegration.h>
+
+namespace ZShell {
+
+class LidWatcher : public QObject {
+	Q_OBJECT
+	QML_ELEMENT
+	QML_SINGLETON
+
+	Q_PROPERTY(bool available READ available NOTIFY availableChanged)
+
+public:
+	explicit LidWatcher(QObject* parent = nullptr);
+
+	[[nodiscard]] bool available() const;
+
+private Q_SLOTS:
+	void onPrepareForSleep(bool goingDown);
+
+Q_SIGNALS:
+	void availableChanged();
+	void lidClosing();
+	void lidOpened();
+
+private:
+	bool m_available;
+};
+
+} // namespace ZShell

shell.qml

@@ -7,6 +7,7 @@
 //@ pragma DropExpensiveFonts
 import Quickshell
 import Quickshell.Services.UPower
+import ZShell
 import qs.Modules
 import qs.Modules.Wallpaper
 import qs.Modules.Lock
@@ -35,6 +36,14 @@ ShellRoot {
 		id: lock
 	}
 
+	Connections {
+		function onLidClosing(): void {
+			lock.locked = true;
+		}
+
+		target: LidWatcher
+	}
+
 	Shortcuts {
 	}