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/texteditor.pri

@@ -1,4 +1,5 @@
 VPATH += $$PWD
-SOURCES += texteditorview.cpp
-HEADERS += texteditorview.h
-#RESOURCES += texteditor.qrc
+SOURCES += texteditorview.cpp \
+    texteditorwidget.cpp
+HEADERS += texteditorview.h \
+    texteditorwidget.h

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

@@ -25,6 +25,8 @@
 
 #include "texteditorview.h"
 
+#include "texteditorwidget.h"
+
 #include <designmodecontext.h>
 #include <designdocument.h>
 #include <modelnode.h>
@@ -41,48 +43,22 @@
 #include <QPair>
 #include <QString>
 #include <QTimer>
-#include <QVBoxLayout>
 #include <QPointer>
 
 namespace QmlDesigner {
 
-class DummyWidget : public QWidget {
-public:
-    DummyWidget(QWidget *parent = nullptr) : QWidget(parent) {
-        QBoxLayout *layout = new QVBoxLayout(this);
-        layout->setMargin(0);
-    }
-    void showEvent(QShowEvent *event) {
-        if (m_widget.isNull())
-            setWidget(QmlDesignerPlugin::instance()->currentDesignDocument()->textEditor()->duplicate()->widget());
-        QWidget::showEvent(event);
-    }
-
-private:
-    void setWidget(QWidget *widget) {
-        if (m_widget)
-            m_widget->deleteLater();
-        m_widget = widget;
-
-        layout()->addWidget(widget);
-    }
-    QPointer<QWidget> m_widget;
-};
-
-
 TextEditorView::TextEditorView(QObject *parent)
     : AbstractView(parent)
-    , m_dummyWidget(new DummyWidget)
+    , m_widget(new TextEditorWidget(this))
 {
     // not completely sure that we need this to just call the right help method ->
-    Internal::TextEditorContext *textEditorContext = new Internal::TextEditorContext(m_dummyWidget);
+    Internal::TextEditorContext *textEditorContext = new Internal::TextEditorContext(m_widget.get());
     Core::ICore::addContextObject(textEditorContext);
 }
 
 TextEditorView::~TextEditorView()
 {
-    m_textEditor->deleteLater();
-    m_dummyWidget->deleteLater();
+    m_widget->deleteLater();
 }
 
 void TextEditorView::modelAttached(Model *model)
@@ -90,6 +66,7 @@ void TextEditorView::modelAttached(Model *model)
     Q_ASSERT(model);
 
     AbstractView::modelAttached(model);
+    m_widget->setTextEditor(qobject_cast<TextEditor::BaseTextEditor*>(QmlDesignerPlugin::instance()->currentDesignDocument()->textEditor()->duplicate()));
 }
 
 void TextEditorView::modelAboutToBeDetached(Model *model)
@@ -119,15 +96,15 @@ void TextEditorView::nodeReparented(const ModelNode &/*node*/, const NodeAbstrac
 
 WidgetInfo TextEditorView::widgetInfo()
 {
-    return createWidgetInfo(m_dummyWidget, 0, "TextEditor", WidgetInfo::CentralPane, 0, tr("Text Editor"));
+    return createWidgetInfo(m_widget.get(), 0, "TextEditor", WidgetInfo::CentralPane, 0, tr("Text Editor"));
 }
 
 QString TextEditorView::contextHelpId() const
 {
-    if (m_textEditor) {
-        QString contextHelpId = m_textEditor->contextHelpId();
+    if (m_widget->textEditor()) {
+        QString contextHelpId = m_widget->textEditor()->contextHelpId();
         if (!contextHelpId.isEmpty())
-            return m_textEditor->contextHelpId();
+            return m_widget->textEditor()->contextHelpId();
     }
     return AbstractView::contextHelpId();
 }
@@ -206,5 +183,6 @@ void TextEditorView::rewriterEndTransaction()
 void TextEditorView::instancePropertyChanged(const QList<QPair<ModelNode, PropertyName> > &/*propertyList*/)
 {
 }
-}
+
+} // namespace QmlDesigner
 

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

@@ -26,12 +26,16 @@
 
 #include <abstractview.h>
 
+#include <memory>
+
 namespace TextEditor { class BaseTextEditor; }
 
 namespace Utils { class CrumblePath; }
 
 namespace QmlDesigner {
 
+class TextEditorWidget;
+
 class QMLDESIGNERCORE_EXPORT TextEditorView : public AbstractView
 {
     Q_OBJECT
@@ -84,8 +88,7 @@ public:
     void deActivateItemCreator();
 
 private:
-    QPointer<TextEditor::BaseTextEditor> m_textEditor;
-    QWidget *m_dummyWidget = 0;
+    std::unique_ptr<TextEditorWidget> m_widget;
 };
 
 } // namespace QmlDesigner

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

@@ -0,0 +1,52 @@
+/****************************************************************************
+**
+** 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.
+**
+****************************************************************************/
+
+#include "texteditorwidget.h"
+
+#include <texteditorview.h>
+
+#include <QVBoxLayout>
+
+namespace QmlDesigner {
+
+TextEditorWidget::TextEditorWidget(TextEditorView *textEditorView) : QWidget()
+  , m_textEditorView(textEditorView)
+
+{
+    QBoxLayout *layout = new QVBoxLayout(this);
+    layout->setMargin(0);
+}
+
+void TextEditorWidget::setTextEditor(TextEditor::BaseTextEditor *textEditor) {
+    m_textEditor.reset(textEditor);
+    layout()->addWidget(textEditor->widget());
+}
+
+QString TextEditorWidget::contextHelpId() const
+{
+    return m_textEditorView->contextHelpId();
+}
+
+} // namespace QmlDesigner

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

src/plugins/qmldesigner/qmldesignerplugin.qbs

@@ -400,6 +400,8 @@ Project {
                 "componentcore/qmldesignericonprovider.h",
                 "texteditor/texteditorview.cpp",
                 "texteditor/texteditorview.h",
+                "texteditor/texteditorwidget.cpp",
+                "texteditor/texteditorwidget.h",
                 "debugview/debugview.cpp",
                 "debugview/debugview.h",
                 "debugview/debugviewwidget.cpp",