sync: from linuxdeepin/dde-session-shell

Synchronize source files from linuxdeepin/dde-session-shell.

Source-pull-request: linuxdeepin/dde-session-shell#4

Author: deepin-ci-robot

src/dde-lock/lockworker.cpp

@@ -135,6 +135,16 @@ void LockWorker::initConnections()
         m_password.clear();
         emit m_model->authFinished(true);
     });
+
+#ifdef ENABLE_DSS_SNIPE
+    connect(m_sessionManagerInter, &SessionManagerInter::LockedChanged, this, [ this ](bool locked) {
+        qDebug() << "SessionManagerInter::LockedChanged" << locked;
+        if (locked && !m_model->visible()) {
+            m_model->showLockScreen();
+        }
+    });
+#endif
+
     /* org.freedesktop.login1.Session */
     connect(m_login1SessionSelf, &Login1SessionSelf::ActiveChanged, this, [this](bool active) {
         qCInfo(DDE_SHELL) << "DBus lock service active changed, active: " << active << ", model visible: " << m_model->visible();