Move Gui stuff out of DiffEditorController

Place it in DiffEditorGuiController, will be needed for
sharing gui settings between unified and sidebyside versions.

Change-Id: I8a858d0549ff84e21f7c909288ca07c5a2ef4e5b
Reviewed-by: Jarek Kobus <jaroslaw.kobus@digia.com>

src/plugins/diffeditor/diffeditorguicontroller.cpp

@@ -0,0 +1,141 @@
+/****************************************************************************
+**
+** 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://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: 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 "diffeditorguicontroller.h"
+#include "diffeditorcontroller.h"
+
+namespace DiffEditor {
+
+DiffEditorGuiController::DiffEditorGuiController(DiffEditorController *controller, QObject *parent)
+    : QObject(parent),
+      m_controller(controller),
+      m_descriptionVisible(true),
+      m_contextLinesNumber(3),
+      m_ignoreWhitespaces(true),
+      m_syncScrollBars(true),
+      m_currentDiffFileIndex(-1)
+{
+    connect(m_controller, SIGNAL(cleared(QString)), this, SLOT(slotUpdateDiffFileIndex()));
+    connect(m_controller, SIGNAL(diffContentsChanged(QList<DiffEditorController::DiffFilesContents>,QString)),
+            this, SLOT(slotUpdateDiffFileIndex()));
+    slotUpdateDiffFileIndex();
+}
+
+DiffEditorGuiController::~DiffEditorGuiController()
+{
+
+}
+
+DiffEditorController *DiffEditorGuiController::controller() const
+{
+    return m_controller;
+}
+
+bool DiffEditorGuiController::isDescriptionVisible() const
+{
+    return m_descriptionVisible;
+}
+
+int DiffEditorGuiController::contextLinesNumber() const
+{
+    return m_contextLinesNumber;
+}
+
+bool DiffEditorGuiController::isIgnoreWhitespaces() const
+{
+    return m_ignoreWhitespaces;
+}
+
+bool DiffEditorGuiController::horizontalScrollBarSynchronization() const
+{
+    return m_syncScrollBars;
+}
+
+int DiffEditorGuiController::currentDiffFileIndex() const
+{
+    return m_currentDiffFileIndex;
+}
+
+void DiffEditorGuiController::slotUpdateDiffFileIndex()
+{
+    m_currentDiffFileIndex = (m_controller->diffContents().isEmpty() ? -1 : 0);
+}
+
+void DiffEditorGuiController::setDescriptionVisible(bool on)
+{
+    if (m_descriptionVisible == on)
+        return;
+
+    m_descriptionVisible = on;
+    emit descriptionVisibilityChanged(on);
+}
+
+void DiffEditorGuiController::setContextLinesNumber(int lines)
+{
+    const int l = qMax(lines, -1);
+    if (m_contextLinesNumber == l)
+        return;
+
+    m_contextLinesNumber = l;
+    emit contextLinesNumberChanged(l);
+}
+
+void DiffEditorGuiController::setIgnoreWhitespaces(bool ignore)
+{
+    if (m_ignoreWhitespaces == ignore)
+        return;
+
+    m_ignoreWhitespaces = ignore;
+    emit ignoreWhitespacesChanged(ignore);
+}
+
+void DiffEditorGuiController::setHorizontalScrollBarSynchronization(bool on)
+{
+    if (m_syncScrollBars == on)
+        return;
+
+    m_syncScrollBars = on;
+    emit horizontalScrollBarSynchronizationChanged(on);
+}
+
+void DiffEditorGuiController::setCurrentDiffFileIndex(int diffFileIndex)
+{
+    if (m_controller->diffContents().isEmpty())
+        return; // -1 is the only valid value in this case
+
+    const int newIndex = qBound(0, diffFileIndex, m_controller->diffContents().count() - 1);
+
+    if (m_currentDiffFileIndex == newIndex)
+        return;
+
+    m_currentDiffFileIndex = newIndex;
+    emit currentDiffFileIndexChanged(newIndex);
+}
+
+} // namespace DiffEditor