LanguageClient: Export function to restart clients for a setting

Fixes: QTCREATORBUG-32015
Change-Id: I03d7e78c710a490a19a4e743389868d24ebeae84
Reviewed-by: Sami Shalayel <sami.shalayel@qt.io>

src/plugins/languageclient/languageclientmanager.cpp

@@ -294,7 +294,12 @@ void LanguageClientManager::applySettings()
     const QList<BaseSettings *> restarts = LanguageClientSettings::changedSettings();
     LanguageClientSettings::toSettings(Core::ICore::settings(), managerInstance->m_currentSettings);
 
-    for (BaseSettings *setting : restarts) {
+    for (BaseSettings *settings : restarts)
+        applySettings(settings);
+}
+
+void LanguageClientManager::applySettings(BaseSettings *setting)
+{
     QList<TextEditor::TextDocument *> documents;
     const QList<Client *> currentClients = clientsForSetting(setting);
     for (Client *client : currentClients) {
@@ -304,7 +309,7 @@ void LanguageClientManager::applySettings()
     for (auto document : std::as_const(documents))
         managerInstance->m_clientForDocument.remove(document);
     if (!setting->isValid() || !setting->m_enabled)
-            continue;
+        return;
     switch (setting->m_startBehavior) {
     case BaseSettings::AlwaysOn: {
         Client *client = startClient(setting);
@@ -363,7 +368,6 @@ void LanguageClientManager::applySettings()
         break;
     }
 }
-}
 
 QList<BaseSettings *> LanguageClientManager::currentSettings()
 {

src/plugins/languageclient/languageclientmanager.h

@@ -52,6 +52,7 @@ public:
         const TextEditor::TextDocument *doc, bool onlyReachable = true);
 
     static void applySettings();
+    static void applySettings(BaseSettings *settings);
     static QList<BaseSettings *> currentSettings();
     static void registerClientSettings(BaseSettings *settings);
     static void enableClientSettings(const QString &settingsId, bool enable = true);