LanguageClient: do not auto-assign documents to all clients

Only assign documents to a client if the client was started by a
setting. Programatically started clients should handle assigned
documents manually.

Change-Id: I192c4c011a48e0406f267d3cab3c860f740ddad7
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/languageclient/client.cpp

@@ -345,10 +345,13 @@ void Client::openDocument(TextEditor::TextDocument *document)
     sendContent(DidOpenTextDocumentNotification(DidOpenTextDocumentParams(item)));
 
     const Client *currentClient = LanguageClientManager::clientForDocument(document);
-    if (currentClient == this) // this is the active client for the document so directly activate it
+    if (currentClient == this) {
+        // this is the active client for the document so directly activate it
         activateDocument(document);
-    else if (currentClient == nullptr) // there is no client for this document so assign it to this server
+    } else if (m_activateDocAutomatically && currentClient == nullptr) {
+        // there is no client for this document so assign it to this server
         LanguageClientManager::openDocumentWithClient(document, this);
+    }
 }
 
 void Client::sendContent(const IContent &content)
@@ -878,6 +881,11 @@ void Client::setSupportedLanguage(const LanguageFilter &filter)
     m_languagFilter = filter;
 }
 
+void Client::setActivateDocumentAutomatically(bool enabled)
+{
+    m_activateDocAutomatically = enabled;
+}
+
 void Client::setInitializationOptions(const QJsonObject &initializationOptions)
 {
     m_initializationOptions = initializationOptions;

src/plugins/languageclient/client.h

@@ -118,6 +118,7 @@ public:
 
     // document synchronization
     void setSupportedLanguage(const LanguageFilter &filter);
+    void setActivateDocumentAutomatically(bool enabled);
     bool isSupportedDocument(const TextEditor::TextDocument *document) const;
     bool isSupportedFile(const Utils::FilePath &filePath, const QString &mimeType) const;
     bool isSupportedUri(const LanguageServerProtocol::DocumentUri &uri) const;
@@ -242,6 +243,7 @@ private:
     QSet<TextEditor::IAssistProcessor *> m_runningAssistProcessors;
     SymbolSupport m_symbolSupport;
     ProgressManager m_progressManager;
+    bool m_activateDocAutomatically = false;
 };
 
 } // namespace LanguageClient

src/plugins/languageclient/languageclientsettings.cpp

@@ -566,6 +566,7 @@ Client *BaseSettings::createClient()
     client->setName(Utils::globalMacroExpander()->expand(m_name));
     client->setSupportedLanguage(m_languageFilter);
     client->setInitializationOptions(initializationOptions());
+    client->setActivateDocumentAutomatically(true);
     return client;
 }