QmlDesigner: Refactoring TextEditorView

* Using smart pointers
* Renaming DummyWidget to TextEditorWidget
* Moving TextEditorWidget to separate file

Change-Id: Idbe0e50f976bf39beac8632d4254d6d9a5afd5b2
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

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

@@ -0,0 +1,58 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+#pragma once
+
+#include <texteditor/texteditor.h>
+
+#include <QWidget>
+
+#include <memory>
+
+namespace QmlDesigner {
+
+class TextEditorView;
+
+class TextEditorWidget : public QWidget {
+
+    Q_OBJECT
+
+public:
+    TextEditorWidget(TextEditorView *textEditorView);
+
+    void setTextEditor(TextEditor::BaseTextEditor *textEditor);
+
+    TextEditor::BaseTextEditor *textEditor() const
+    {
+        return m_textEditor.get();
+    }
+
+    QString contextHelpId() const;
+
+private:
+    std::unique_ptr<TextEditor::BaseTextEditor> m_textEditor;
+    QPointer<TextEditorView> m_textEditorView;
+};
+
+} // namespace QmlDesigner