LanguageClient: remove friend relationship between manager and plugin

Change-Id: I594d62615f365db34174c4bd1e6c8a9f6aeb545a
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

4 files changed, 58 insertions, 25 deletions

diff --git a/src/plugins/languageclient/languageclientmanager.cpp b/src/plugins/languageclient/languageclientmanager.cpp
index 1af88ea8c7..7da32eda19 100644
--- a/src/plugins/languageclient/languageclientmanager.cpp
+++ b/src/plugins/languageclient/languageclientmanager.cpp
@@ -26,6 +26,7 @@
 #include "languageclientmanager.h"
 
 #include "languageclientutils.h"
+#include "languageclientplugin.h"
 
 #include <coreplugin/editormanager/editormanager.h>
 #include <coreplugin/editormanager/ieditor.h>
@@ -49,45 +50,50 @@ namespace LanguageClient {
 
 static LanguageClientManager *managerInstance = nullptr;
 
-LanguageClientManager::LanguageClientManager()
+LanguageClientManager::LanguageClientManager(QObject *parent)
+    : QObject (parent)
 {
+    using namespace Core;
+    using namespace ProjectExplorer;
     JsonRpcMessageHandler::registerMessageProvider<PublishDiagnosticsNotification>();
     JsonRpcMessageHandler::registerMessageProvider<ApplyWorkspaceEditRequest>();
     JsonRpcMessageHandler::registerMessageProvider<LogMessageNotification>();
     JsonRpcMessageHandler::registerMessageProvider<ShowMessageRequest>();
     JsonRpcMessageHandler::registerMessageProvider<ShowMessageNotification>();
     JsonRpcMessageHandler::registerMessageProvider<WorkSpaceFolderRequest>();
-    managerInstance = this;
+    connect(EditorManager::instance(), &EditorManager::editorOpened,
+            this, &LanguageClientManager::editorOpened);
+    connect(EditorManager::instance(), &EditorManager::documentOpened,
+            this, &LanguageClientManager::documentOpened);
+    connect(EditorManager::instance(), &EditorManager::documentClosed,
+            this, &LanguageClientManager::documentClosed);
+    connect(EditorManager::instance(), &EditorManager::saved,
+            this, &LanguageClientManager::documentContentsSaved);
+    connect(EditorManager::instance(), &EditorManager::aboutToSave,
+            this, &LanguageClientManager::documentWillSave);
+    connect(SessionManager::instance(), &SessionManager::projectAdded,
+            this, &LanguageClientManager::projectAdded);
+    connect(SessionManager::instance(), &SessionManager::projectRemoved,
+            this, &LanguageClientManager::projectRemoved);
 }
 
 LanguageClientManager::~LanguageClientManager()
 {
     QTC_ASSERT(m_clients.isEmpty(), qDeleteAll(m_clients));
+    managerInstance = nullptr;
 }
 
 void LanguageClientManager::init()
 {
-    using namespace Core;
-    using namespace ProjectExplorer;
-    QTC_ASSERT(managerInstance, return);
-    connect(EditorManager::instance(), &EditorManager::editorOpened,
-            managerInstance, &LanguageClientManager::editorOpened);
-    connect(EditorManager::instance(), &EditorManager::documentOpened,
-            managerInstance, &LanguageClientManager::documentOpened);
-    connect(EditorManager::instance(), &EditorManager::documentClosed,
-            managerInstance, &LanguageClientManager::documentClosed);
-    connect(EditorManager::instance(), &EditorManager::saved,
-            managerInstance, &LanguageClientManager::documentContentsSaved);
-    connect(EditorManager::instance(), &EditorManager::aboutToSave,
-            managerInstance, &LanguageClientManager::documentWillSave);
-    connect(SessionManager::instance(), &SessionManager::projectAdded,
-            managerInstance, &LanguageClientManager::projectAdded);
-    connect(SessionManager::instance(), &SessionManager::projectRemoved,
-            managerInstance, &LanguageClientManager::projectRemoved);
+    if (managerInstance)
+        return;
+    QTC_ASSERT(LanguageClientPlugin::instance(), return);
+    managerInstance = new LanguageClientManager(LanguageClientPlugin::instance());
 }
 
 void LanguageClientManager::startClient(Client *client)
 {
+    QTC_ASSERT(managerInstance, return);
     QTC_ASSERT(client, return);
     if (managerInstance->m_shuttingDown) {
         managerInstance->clientFinished(client);
@@ -106,16 +112,19 @@ void LanguageClientManager::startClient(Client *client)
 
 QVector<Client *> LanguageClientManager::clients()
 {
+    QTC_ASSERT(managerInstance, return {});
     return managerInstance->m_clients;
 }
 
 void LanguageClientManager::addExclusiveRequest(const MessageId &id, Client *client)
 {
+    QTC_ASSERT(managerInstance, return);
     managerInstance->m_exclusiveRequests[id] << client;
 }
 
 void LanguageClientManager::reportFinished(const MessageId &id, Client *byClient)
 {
+    QTC_ASSERT(managerInstance, return);
     for (Client *client : managerInstance->m_exclusiveRequests[id]) {
         if (client != byClient)
             client->cancelRequest(id);
@@ -125,6 +134,7 @@ void LanguageClientManager::reportFinished(const MessageId &id, Client *byClient
 
 void LanguageClientManager::deleteClient(Client *client)
 {
+    QTC_ASSERT(managerInstance, return);
     QTC_ASSERT(client, return);
     client->disconnect();
     managerInstance->m_clients.removeAll(client);
@@ -136,6 +146,7 @@ void LanguageClientManager::deleteClient(Client *client)
 
 void LanguageClientManager::shutdown()
 {
+    QTC_ASSERT(managerInstance, return);
     if (managerInstance->m_shuttingDown)
         return;
     managerInstance->m_shuttingDown = true;
@@ -160,6 +171,7 @@ LanguageClientManager *LanguageClientManager::instance()
 QList<Client *> LanguageClientManager::clientsSupportingDocument(
     const TextEditor::TextDocument *doc)
 {
+    QTC_ASSERT(managerInstance, return {});
     QTC_ASSERT(doc, return {};);
     return Utils::filtered(managerInstance->reachableClients(), [doc](Client *client) {
         return client->isSupportedDocument(doc);
diff --git a/src/plugins/languageclient/languageclientmanager.h b/src/plugins/languageclient/languageclientmanager.h
index 9f075a94b3..7a8e83caa2 100644
--- a/src/plugins/languageclient/languageclientmanager.h
+++ b/src/plugins/languageclient/languageclientmanager.h
@@ -73,7 +73,7 @@ signals:
     void shutdownFinished();
 
 private:
-    LanguageClientManager();
+    LanguageClientManager(QObject *parent);
 
     void editorOpened(Core::IEditor *editor);
     void documentOpened(Core::IDocument *document);
@@ -95,7 +95,5 @@ private:
     bool m_shuttingDown = false;
     QVector<Client *> m_clients;
     QHash<LanguageServerProtocol::MessageId, QList<Client *>> m_exclusiveRequests;
-
-    friend class LanguageClientPlugin;
 };
 } // namespace LanguageClient
diff --git a/src/plugins/languageclient/languageclientplugin.cpp b/src/plugins/languageclient/languageclientplugin.cpp
index 1d64097e62..31643474f6 100644
--- a/src/plugins/languageclient/languageclientplugin.cpp
+++ b/src/plugins/languageclient/languageclientplugin.cpp
@@ -25,18 +25,37 @@
 
 #include "languageclientplugin.h"
 
+#include "languageclientmanager.h"
+
 #include "client.h"
 
 namespace LanguageClient {
 
+static LanguageClientPlugin *m_instance = nullptr;
+
+LanguageClientPlugin::LanguageClientPlugin()
+{
+    m_instance = this;
+}
+
+LanguageClientPlugin::~LanguageClientPlugin()
+{
+    m_instance = nullptr;
+}
+
+LanguageClientPlugin *LanguageClientPlugin::instance()
+{
+    return m_instance;
+}
+
 bool LanguageClientPlugin::initialize(const QStringList & /*arguments*/, QString * /*errorString*/)
 {
+    LanguageClientManager::init();
     return true;
 }
 
 void LanguageClientPlugin::extensionsInitialized()
 {
-    LanguageClientManager::init();
     LanguageClientSettings::init();
 }
 
@@ -45,6 +64,8 @@ ExtensionSystem::IPlugin::ShutdownFlag LanguageClientPlugin::aboutToShutdown()
     LanguageClientManager::shutdown();
     if (LanguageClientManager::clients().isEmpty())
         return ExtensionSystem::IPlugin::SynchronousShutdown;
+    QTC_ASSERT(LanguageClientManager::instance(),
+               return ExtensionSystem::IPlugin::SynchronousShutdown);
     connect(LanguageClientManager::instance(), &LanguageClientManager::shutdownFinished,
             this, &ExtensionSystem::IPlugin::asynchronousShutdownFinished);
     return ExtensionSystem::IPlugin::AsynchronousShutdown;
diff --git a/src/plugins/languageclient/languageclientplugin.h b/src/plugins/languageclient/languageclientplugin.h
index 2cff52cd7b..8fbf66de03 100644
--- a/src/plugins/languageclient/languageclientplugin.h
+++ b/src/plugins/languageclient/languageclientplugin.h
@@ -38,7 +38,10 @@ class LanguageClientPlugin : public ExtensionSystem::IPlugin
     Q_OBJECT
     Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QtCreatorPlugin" FILE "LanguageClient.json")
 public:
-    LanguageClientPlugin() = default;
+    LanguageClientPlugin();
+    ~LanguageClientPlugin() override;
+
+    static LanguageClientPlugin *instance();
 
     // IPlugin interface
 private:
@@ -47,7 +50,6 @@ private:
     ShutdownFlag aboutToShutdown() override;
 
 private:
-    LanguageClientManager m_clientManager;
     LanguageClientOutlineWidgetFactory m_outlineFactory;
 };