Send valid UUIDs for output device globals

Currently, kwin sends invalid uuids. This change makes harder to send
invalid uuids by porting relevant parts of the OutputDeviceInterface to
QUuid.

autotests/client/test_wayland_outputdevice.cpp

@@ -81,8 +81,7 @@ void TestWaylandOutputDevice::init()
     QVERIFY(m_display->isRunning());
 
     m_serverOutputDevice = new OutputDeviceInterface(m_display, this);
-    m_serverOutputDevice->setUuid("1337");
-
+    m_serverOutputDevice->setUuid(QUuid("00000000-0000-0000-0000-000000000000"));
 
     OutputDeviceInterface::Mode m0;
     m0.id = 0;
@@ -228,7 +227,7 @@ void TestWaylandOutputDevice::testRegistry()
 
     QCOMPARE(output.edid(), m_edid);
     QCOMPARE(output.enabled(), OutputDevice::Enablement::Enabled);
-    QCOMPARE(output.uuid(), QStringLiteral("1337"));
+    QCOMPARE(output.uuid(), QStringLiteral("00000000-0000-0000-0000-000000000000"));
     QCOMPARE(output.serialNumber(), m_serialNumber);
     QCOMPARE(output.eisaId(), m_eidaId);
 }
@@ -596,22 +595,16 @@ void TestWaylandOutputDevice::testId()
     wl_display_flush(m_connection->display());
     QVERIFY(outputChanged.wait());
 
-    QCOMPARE(output.uuid(), QStringLiteral("1337"));
+    QCOMPARE(output.uuid(), QStringLiteral("00000000-0000-0000-0000-000000000000"));
 
     QSignalSpy idChanged(&output, &KWayland::Client::OutputDevice::uuidChanged);
     QVERIFY(idChanged.isValid());
 
-    m_serverOutputDevice->setUuid("42");
-    QVERIFY(idChanged.wait());
-    QCOMPARE(idChanged.first().first().toByteArray(), QByteArray("42"));
-    idChanged.clear();
-    QCOMPARE(output.uuid(), QStringLiteral("42"));
-
-    m_serverOutputDevice->setUuid("4711");
+    m_serverOutputDevice->setUuid(QUuid("00000000-0000-0000-0000-000000000001"));
     QVERIFY(idChanged.wait());
-    QCOMPARE(idChanged.first().first().toByteArray(), QByteArray("4711"));
+    QCOMPARE(idChanged.first().first().toByteArray(), QByteArray("00000000-0000-0000-0000-000000000001"));
     idChanged.clear();
-    QCOMPARE(output.uuid(), QStringLiteral("4711"));
+    QCOMPARE(output.uuid(), QStringLiteral("00000000-0000-0000-0000-000000000001"));
 }
 
 void TestWaylandOutputDevice::testDone()

src/server/outputdevice_interface.cpp

@@ -62,7 +62,7 @@ public:
 
     QByteArray edid;
     OutputDeviceInterface::Enablement enabled = OutputDeviceInterface::Enablement::Enabled;
-    QString uuid;
+    QUuid uuid;
     QPointer<Display> display;
     OutputDeviceInterface *q;
 
@@ -568,7 +568,7 @@ OutputDeviceInterface::Enablement OutputDeviceInterface::enabled() const
     return d->enabled;
 }
 
-void OutputDeviceInterface::setUuid(const QString &uuid)
+void OutputDeviceInterface::setUuid(const QUuid &uuid)
 {
     if (d->uuid != uuid) {
         d->uuid = uuid;
@@ -577,7 +577,7 @@ void OutputDeviceInterface::setUuid(const QString &uuid)
     }
 }
 
-QString OutputDeviceInterface::uuid() const
+QUuid OutputDeviceInterface::uuid() const
 {
     return d->uuid;
 }
@@ -598,7 +598,7 @@ void OutputDeviceInterfacePrivate::sendEnabled(Resource *resource)
 
 void OutputDeviceInterfacePrivate::sendUuid(Resource *resource)
 {
-    send_uuid(resource->handle, uuid);
+    send_uuid(resource->handle, uuid.toString(QUuid::WithoutBraces));
 }
 
 void OutputDeviceInterfacePrivate::updateEnabled()

src/server/outputdevice_interface.h

@@ -10,6 +10,7 @@
 #include <QObject>
 #include <QPoint>
 #include <QSize>
+#include <QUuid>
 #include <QVector>
 
 struct wl_resource;
@@ -41,7 +42,7 @@ class KWAYLANDSERVER_EXPORT OutputDeviceInterface : public QObject
     Q_PROPERTY(qreal scale READ scaleF WRITE setScaleF NOTIFY scaleFChanged)
     Q_PROPERTY(QByteArray edid READ edid WRITE setEdid NOTIFY edidChanged)
     Q_PROPERTY(OutputDeviceInterface::Enablement enabled READ enabled WRITE setEnabled NOTIFY enabledChanged)
-    Q_PROPERTY(QString uuid READ uuid WRITE setUuid NOTIFY uuidChanged)
+    Q_PROPERTY(QUuid uuid READ uuid WRITE setUuid NOTIFY uuidChanged)
 public:
     enum class SubPixel {
         Unknown,
@@ -103,7 +104,7 @@ public:
 
     QByteArray edid() const;
     OutputDeviceInterface::Enablement enabled() const;
-    QString uuid() const;
+    QUuid uuid() const;
 
     void setPhysicalSize(const QSize &size);
     void setGlobalPosition(const QPoint &pos);
@@ -133,7 +134,7 @@ public:
 
     void setEdid(const QByteArray &edid);
     void setEnabled(OutputDeviceInterface::Enablement enabled);
-    void setUuid(const QString &uuid);
+    void setUuid(const QUuid &uuid);
 
     static OutputDeviceInterface *get(wl_resource *native);
     static QList<OutputDeviceInterface *>list();