QmlDesigner: Start logger only if designer is started

Task-number: QTCREATORBUG-8618

Change-Id: I73c2256893029a4a1a0725c14df432a87ee7e827
Reviewed-by: Alessandro Portale <alessandro.portale@digia.com>

src/plugins/qmldesigner/designercore/model/viewlogger.cpp

@@ -65,23 +65,24 @@ QString ViewLogger::time() const
 ViewLogger::ViewLogger(QObject *parent)
     : AbstractView(parent)
 {
-    const QString path = QDir::tempPath() + QString("/qmldesigner-logger-%1-XXXXXX.txt").
+    m_timer.start();
+}
+
+void ViewLogger::modelAttached(Model *model)
+{
+    static const QString path = QDir::tempPath() + QString("/qmldesigner-logger-%1-XXXXXX.txt").
                          arg(QDateTime::currentDateTime().toString(Qt::ISODate).
                          replace(':', '-'));
-    QTemporaryFile *temporaryFile = new QTemporaryFile(path, this);
+    static QTemporaryFile *temporaryFile = new QTemporaryFile(path, this);
     temporaryFile->setAutoRemove(false);
-    if (temporaryFile->open()) {
+    static bool fileOpen = temporaryFile->open();
+    if (fileOpen) {
         qDebug() << "QmlDesigner: Log file is:" << temporaryFile->fileName();
         m_output.setDevice(temporaryFile);
     } else {
         qDebug() << "QmlDesigner: failed to open:" << temporaryFile->fileName();
     }
 
-    m_timer.start();
-}
-
-void ViewLogger::modelAttached(Model *model)
-{
     m_output << time() << indent("modelAttached:") << model << endl;
     AbstractView::modelAttached(model);
 }

src/plugins/qmldesigner/designercore/model/viewmanager.cpp

@@ -92,6 +92,10 @@ void ViewManager::detachViewsExceptRewriterAndComponetView()
     currentModel()->detachView(&m_statesEditorView);
     currentModel()->detachView(&m_propertyEditorView);
     currentModel()->setNodeInstanceView(0);
+
+    static bool enableViewLogger = !qgetenv("QTC_ENABLE_QMLDESIGNER_LOGGER").isEmpty();
+    if (enableViewLogger)
+        currentModel()->detachView(&m_viewLogger);
 }
 
 void ViewManager::attachItemLibraryView()
@@ -114,6 +118,10 @@ void ViewManager::detachComponentView()
 
 void ViewManager::attachViewsExceptRewriterAndComponetView()
 {
+    static bool enableViewLogger = !qgetenv("QTC_ENABLE_QMLDESIGNER_LOGGER").isEmpty();
+    if (enableViewLogger)
+        currentModel()->attachView(&m_viewLogger);
+
     attachNodeInstanceView();
     currentModel()->attachView(&m_formEditorView);
     currentModel()->attachView(&m_navigatorView);