Rename AT-SPI specific DBusConnection type to fix clang warnings

DBusConnection is forward declared as a class, and after
c9e62c24440e99ace02dcceffea2ae6542f49224 we include a header that
forward declares it as a struct. This triggers a warning, and also
indicates that we have an ODR violation.

Rename the offending type in Qt.

Fixes: QTBUG-125623
Change-Id: I13ffdceec82b86910a60083aebc2afc47f9f3a4e
Reviewed-by: Tim Blechmann <tim@klingt.org>
Reviewed-by: Michael Weghorn <m.weghorn@posteo.de>
Reviewed-by: Robert Löhning <robert.loehning@qt.io>

src/gui/accessible/linux/atspiadaptor.cpp

@@ -49,7 +49,7 @@ using namespace Qt::StringLiterals;
 Q_LOGGING_CATEGORY(lcAccessibilityAtspi, "qt.accessibility.atspi")
 Q_LOGGING_CATEGORY(lcAccessibilityAtspiCreation, "qt.accessibility.atspi.creation")
 
-AtSpiAdaptor::AtSpiAdaptor(DBusConnection *connection, QObject *parent)
+AtSpiAdaptor::AtSpiAdaptor(QAtSpiDBusConnection *connection, QObject *parent)
     : QDBusVirtualObject(parent), m_dbus(connection)
     , sendFocus(0)
     , sendObject(0)

src/gui/accessible/linux/atspiadaptor_p.h

@@ -38,7 +38,7 @@ class AtSpiAdaptor :public QDBusVirtualObject
     Q_OBJECT
 
 public:
-    explicit AtSpiAdaptor(DBusConnection *connection, QObject *parent = nullptr);
+    explicit AtSpiAdaptor(QAtSpiDBusConnection *connection, QObject *parent = nullptr);
     ~AtSpiAdaptor();
 
     void registerApplication();
@@ -114,7 +114,7 @@ private:
 
     // private vars
     QSpiObjectReference accessibilityRegistry;
-    DBusConnection *m_dbus;
+    QAtSpiDBusConnection *m_dbus;
     QSpiApplicationAdaptor *m_applicationAdaptor;
 
     /// Assigned from the accessibility registry.

src/gui/accessible/linux/dbusconnection.cpp

@@ -26,13 +26,13 @@ using namespace Qt::StringLiterals;
 #define A11Y_PATH "/org/a11y/bus"_L1
 
 /*!
-    \class DBusConnection
+    \class QAtSpiDBusConnection
     \internal
     \brief Connects to the accessibility dbus.
 
     This is usually a different bus from the session bus.
 */
-DBusConnection::DBusConnection(QObject *parent)
+QAtSpiDBusConnection::QAtSpiDBusConnection(QObject *parent)
     : QObject(parent), m_a11yConnection(QString()), m_enabled(false)
 {
     // If the bus is explicitly set via env var it overrides everything else.
@@ -66,7 +66,7 @@ DBusConnection::DBusConnection(QObject *parent)
     }
 }
 
-QString DBusConnection::getAddressFromXCB()
+QString QAtSpiDBusConnection::getAddressFromXCB()
 {
     QGuiApplication *app = qobject_cast<QGuiApplication *>(QCoreApplication::instance());
     if (!app)
@@ -85,7 +85,7 @@ QString DBusConnection::getAddressFromXCB()
 // We have the a11y registry on the session bus.
 // Subscribe to updates about a11y enabled state.
 // Find out the bus address
-void DBusConnection::serviceRegistered()
+void QAtSpiDBusConnection::serviceRegistered()
 {
     // listen to enabled changes
     QDBusConnection c = QDBusConnection::sessionBus();
@@ -113,12 +113,12 @@ void DBusConnection::serviceRegistered()
     //    connect(a11yStatus, ); QtDbus doesn't support notifications for property changes yet
 }
 
-void DBusConnection::serviceUnregistered()
+void QAtSpiDBusConnection::serviceUnregistered()
 {
     emit enabledChanged(false);
 }
 
-void DBusConnection::connectA11yBus(const QString &address)
+void QAtSpiDBusConnection::connectA11yBus(const QString &address)
 {
     if (address.isEmpty()) {
         qWarning("Could not find Accessibility DBus address.");
@@ -130,7 +130,7 @@ void DBusConnection::connectA11yBus(const QString &address)
         emit enabledChanged(true);
 }
 
-void DBusConnection::dbusError(const QDBusError &error)
+void QAtSpiDBusConnection::dbusError(const QDBusError &error)
 {
     qWarning() << "Accessibility encountered a DBus error:" << error;
 }
@@ -139,7 +139,7 @@ void DBusConnection::dbusError(const QDBusError &error)
   Returns the DBus connection that got established.
   Or an invalid connection if not yet connected.
 */
-QDBusConnection DBusConnection::connection() const
+QDBusConnection QAtSpiDBusConnection::connection() const
 {
     return m_a11yConnection;
 }

src/gui/accessible/linux/dbusconnection_p.h

@@ -27,12 +27,12 @@ QT_BEGIN_NAMESPACE
 
 class QDBusServiceWatcher;
 
-class DBusConnection : public QObject
+class QAtSpiDBusConnection : public QObject
 {
     Q_OBJECT
 
 public:
-    DBusConnection(QObject *parent = nullptr);
+    QAtSpiDBusConnection(QObject *parent = nullptr);
     QDBusConnection connection() const;
     bool isEnabled() const { return m_enabled; }
 

src/gui/accessible/linux/qspiaccessiblebridge.cpp

@@ -31,7 +31,7 @@ using namespace Qt::StringLiterals;
 QSpiAccessibleBridge::QSpiAccessibleBridge()
     : cache(nullptr), dec(nullptr), dbusAdaptor(nullptr)
 {
-    dbusConnection = new DBusConnection();
+    dbusConnection = new QAtSpiDBusConnection();
     connect(dbusConnection, SIGNAL(enabledChanged(bool)), this, SLOT(enabledChanged(bool)));
     // Now that we have connected the signal, make sure we didn't miss a change,
     // e.g. when running as root or when AT_SPI_BUS_ADDRESS is set by hand.

src/gui/accessible/linux/qspiaccessiblebridge_p.h

@@ -27,7 +27,7 @@ QT_REQUIRE_CONFIG(accessibility);
 
 QT_BEGIN_NAMESPACE
 
-class DBusConnection;
+class QAtSpiDBusConnection;
 class QSpiDBusCache;
 class AtSpiAdaptor;
 struct RoleNames;
@@ -60,7 +60,7 @@ private:
     QSpiDBusCache *cache;
     DeviceEventControllerAdaptor *dec;
     AtSpiAdaptor *dbusAdaptor;
-    DBusConnection* dbusConnection;
+    QAtSpiDBusConnection* dbusConnection;
     SpiRoleMapping m_spiRoleMapping;
 };