DiffEditor: Introduce a base class for the different views

... of the diff. Currently that is side-by-side and unified, just
as before.

Change-Id: I62a5462344c4b4ae652899f9d5b2936aa5a692b8
Reviewed-by: Jarek Kobus <jaroslaw.kobus@theqtcompany.com>

src/plugins/diffeditor/diffview.cpp

@@ -0,0 +1,113 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia.  For licensing terms and
+** conditions see http://www.qt.io/licensing.  For further information
+** use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file.  Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+****************************************************************************/
+
+#include "diffview.h"
+
+#include "unifieddiffeditorwidget.h"
+#include "sidebysidediffeditorwidget.h"
+
+#include <utils/qtcassert.h>
+
+namespace DiffEditor {
+namespace Internal {
+
+QIcon IDiffView::icon() const
+{
+    return m_icon;
+}
+
+QString IDiffView::toolTip() const
+{
+    return m_toolTip;
+}
+
+Core::Id IDiffView::id() const
+{
+    return m_id;
+}
+
+void IDiffView::setIcon(const QIcon &icon)
+{
+    m_icon = icon;
+}
+
+void IDiffView::setToolTip(const QString &toolTip)
+{
+    m_toolTip = toolTip;
+}
+
+void IDiffView::setId(const Core::Id &id)
+{
+    m_id = id;
+}
+
+UnifiedView::UnifiedView() : m_widget(0)
+{
+    setId(UNIFIED_VIEW_ID);
+    setIcon(QIcon(QLatin1String(":/diffeditor/images/unifieddiff.png")));
+    setToolTip(QCoreApplication::translate("DiffEditor::UnifiedView", "Switch to Unified Diff Editor"));
+}
+
+QWidget *UnifiedView::widget()
+{
+    if (!m_widget)
+        m_widget = new UnifiedDiffEditorWidget;
+    return m_widget;
+}
+
+void UnifiedView::setDiffEditorGuiController(DiffEditorGuiController *controller)
+{
+    QTC_ASSERT(m_widget, return);
+    m_widget->setDiffEditorGuiController(controller);
+}
+
+SideBySideView::SideBySideView() : m_widget(0)
+{
+    setId(SIDE_BY_SIDE_VIEW_ID);
+    setIcon(QIcon(QLatin1String(":/diffeditor/images/sidebysidediff.png")));
+    setToolTip(QCoreApplication::translate("DiffEditor::SideBySideView",
+                                           "Switch to Side By Side Diff Editor"));
+}
+
+QWidget *SideBySideView::widget()
+{
+    if (!m_widget)
+        m_widget = new SideBySideDiffEditorWidget;
+    return m_widget;
+}
+
+void SideBySideView::setDiffEditorGuiController(DiffEditorGuiController *controller)
+{
+    QTC_ASSERT(m_widget, return);
+    m_widget->setDiffEditorGuiController(controller);
+}
+
+} // namespace Internal
+} // namespace DiffEditor