LanguageClient: add state changed signal to client

Change-Id: I13b69eb386b4e356f4f23c3b464f83a2a1d9ab14
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/languageclient/client.cpp

@@ -299,6 +299,12 @@ public:
 
     bool reset();
 
+    void setState(Client::State state)
+    {
+        m_state = state;
+        emit q->stateChanged(state);
+    }
+
     Client::State m_state = Client::Uninitialized;
     QHash<LanguageServerProtocol::MessageId,
           LanguageServerProtocol::ResponseHandler::Callback> m_responseHandlers;
@@ -569,7 +575,7 @@ void Client::initialize()
 
     // directly send content now otherwise the state check of sendContent would fail
     d->sendMessageNow(initRequest);
-    d->m_state = InitializeRequested;
+    d->setState(InitializeRequested);
 }
 
 void Client::shutdown()
@@ -581,7 +587,7 @@ void Client::shutdown()
         d->shutDownCallback(shutdownResponse);
     });
     sendMessage(shutdown);
-    d->m_state = ShutdownRequested;
+    d->setState(ShutdownRequested);
     d->m_shutdownTimer.start();
 }
 
@@ -1526,7 +1532,7 @@ void Client::projectClosed(ProjectExplorer::Project *project)
         if (d->m_state == Initialized) {
             LanguageClientManager::shutdownClient(this);
         } else {
-            d->m_state = Shutdown; // otherwise the manager would try to restart this server
+            d->setState(Shutdown); // otherwise the manager would try to restart this server
             emit finished();
         }
         d->m_project = nullptr;
@@ -1696,7 +1702,7 @@ bool ClientPrivate::reset()
     }
     m_restartCountResetTimer.start();
     --m_restartsLeft;
-    m_state = Client::Uninitialized;
+    setState(Client::Uninitialized);
     m_responseHandlers.clear();
     m_clientInterface->resetBuffer();
     updateOpenedEditorToolBars();
@@ -1723,7 +1729,7 @@ bool ClientPrivate::reset()
 void Client::setError(const QString &message)
 {
     log(message);
-    d->m_state = d->m_state < Initialized ? FailedToInitialize : Error;
+    d->setState(d->m_state < Initialized ? FailedToInitialize : Error);
 }
 
 ProgressManager *Client::progressManager()
@@ -2152,7 +2158,7 @@ void ClientPrivate::initializeCallback(const InitializeRequest::Response &initRe
                                                    QMessageBox::Retry | QMessageBox::Cancel,
                                                    QMessageBox::Retry);
                 if (result == QMessageBox::Retry) {
-                    m_state = Client::Uninitialized;
+                    setState(Client::Uninitialized);
                     q->initialize();
                     return;
                 }
@@ -2204,7 +2210,7 @@ void ClientPrivate::initializeCallback(const InitializeRequest::Response &initRe
         m_tokenSupport.setLegend(tokenProvider.legend());
 
     qCDebug(LOGLSPCLIENT) << "language server " << m_displayName << " initialized";
-    m_state = Client::Initialized;
+    setState(Client::Initialized);
     q->sendMessage(InitializeNotification(InitializedParams()));
 
     q->updateConfiguration(m_configuration);
@@ -2227,7 +2233,7 @@ void ClientPrivate::shutDownCallback(const ShutdownRequest::Response &shutdownRe
     // directly send content now otherwise the state check of sendContent would fail
     sendMessageNow(ExitNotification());
     qCDebug(LOGLSPCLIENT) << "language server " << m_displayName << " shutdown";
-    m_state = Client::Shutdown;
+    setState(Client::Shutdown);
     m_shutdownTimer.start();
 }
 

src/plugins/languageclient/client.h

@@ -215,6 +215,7 @@ signals:
     void documentUpdated(TextEditor::TextDocument *document);
     void workDone(const LanguageServerProtocol::ProgressToken &token);
     void shadowDocumentSwitched(const Utils::FilePath &filePath);
+    void stateChanged(State state);
     void finished();
 
 protected: