QmlDesigner: Fix indenting in embedded text editor

We have to set the duplicated editor as the current editor.
We avoid triggering a document change by using a flag.

Change-Id: I22410ec2f3b24695b397525811940c8303e0ed87
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/qmldesigner/components/texteditor/texteditorwidget.cpp

@@ -30,6 +30,8 @@
 
 #include <rewriterview.h>
 
+#include <qmldesignerplugin.h>
+
 #include <theming.h>
 
 #include <utils/fileutils.h>
@@ -68,6 +70,8 @@ void TextEditorWidget::setTextEditor(TextEditor::BaseTextEditor *textEditor)
     layout()->addWidget(m_statusBar);
     setFocusProxy(textEditor->editorWidget());
 
+    QmlDesignerPlugin::instance()->emitCurrentTextEditorChanged(textEditor);
+
     connect(textEditor->editorWidget(), &QPlainTextEdit::cursorPositionChanged,
             &m_updateSelectionTimer, static_cast<void (QTimer::*)()>(&QTimer::start));
     textEditor->editorWidget()->installEventFilter(this);

src/plugins/qmldesigner/qmldesignerplugin.cpp

@@ -82,6 +82,7 @@ public:
 
     DesignerSettings settings;
     Internal::DesignModeContext *context = nullptr;
+    bool blockEditorChange = false;
 };
 
 QmlDesignerPlugin *QmlDesignerPlugin::m_instance = nullptr;
@@ -345,6 +346,9 @@ void QmlDesignerPlugin::hideDesigner()
 
 void QmlDesignerPlugin::changeEditor()
 {
+    if (d->blockEditorChange)
+         return;
+
     if (d->documentManager.hasCurrentDesignDocument()) {
         deactivateAutoSynchronization();
         d->mainWidget->saveSettings();
@@ -472,6 +476,13 @@ void QmlDesignerPlugin::switchToTextModeDeferred()
     });
 }
 
+void QmlDesignerPlugin::emitCurrentTextEditorChanged(Core::IEditor *editor)
+{
+    d->blockEditorChange = true;
+    Core::EditorManager::instance()->currentEditorChanged(editor);
+    d->blockEditorChange = false;
+}
+
 QmlDesignerPlugin *QmlDesignerPlugin::instance()
 {
     return m_instance;

src/plugins/qmldesigner/qmldesignerplugin.h

@@ -83,6 +83,7 @@ public:
     Internal::DesignModeWidget *mainWidget() const;
 
     void switchToTextModeDeferred();
+    void emitCurrentTextEditorChanged(Core::IEditor *editor);
 
 private: // functions
     void integrateIntoQtCreator(QWidget *modeWidget);