Basic integration of diff editor inside git plugin

Change-Id: I7675fc1d994020f94f42f6bd7b4f75aa29e6edf6
Reviewed-by: David Schulz <david.schulz@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/diffeditor/diffeditoreditable.cpp

@@ -0,0 +1,162 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 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 "diffeditoreditable.h"
+#include "diffeditorfile.h"
+#include "diffeditorwidget.h"
+#include "diffeditorconstants.h"
+
+#include <coreplugin/icore.h>
+#include <QCoreApplication>
+#include <QToolButton>
+#include <QSpinBox>
+#include <QStyle>
+#include <QLabel>
+
+namespace DiffEditor {
+
+///////////////////////////////// DiffEditorEditable //////////////////////////////////
+
+DiffEditorEditable::DiffEditorEditable(DiffEditorWidget *editorWidget)
+    : IEditor(0),
+      m_file(new Internal::DiffEditorFile(QLatin1String(Constants::DIFF_EDITOR_MIMETYPE), this)),
+      m_editorWidget(editorWidget),
+      m_toolWidget(0)
+{
+    setWidget(editorWidget);
+}
+
+DiffEditorEditable::~DiffEditorEditable()
+{
+    delete m_toolWidget;
+    if (m_widget)
+        delete m_widget;
+}
+
+bool DiffEditorEditable::createNew(const QString &contents)
+{
+    Q_UNUSED(contents)
+    return true;
+}
+
+bool DiffEditorEditable::open(QString *errorString, const QString &fileName, const QString &realFileName)
+{
+    Q_UNUSED(errorString)
+    Q_UNUSED(fileName)
+    Q_UNUSED(realFileName)
+    return true;
+}
+
+Core::IDocument *DiffEditorEditable::document()
+{
+    return m_file;
+}
+
+QString DiffEditorEditable::displayName() const
+{
+    if (m_displayName.isEmpty())
+        m_displayName = QCoreApplication::translate("DiffEditor", Constants::DIFF_EDITOR_DISPLAY_NAME);
+    return m_displayName;
+}
+
+void DiffEditorEditable::setDisplayName(const QString &title)
+{
+    m_displayName = title;
+    emit changed();
+}
+
+bool DiffEditorEditable::duplicateSupported() const
+{
+    return false;
+}
+
+Core::IEditor *DiffEditorEditable::duplicate(QWidget *parent)
+{
+    Q_UNUSED(parent)
+    return 0;
+}
+
+Core::Id DiffEditorEditable::id() const
+{
+    return Constants::DIFF_EDITOR_ID;
+}
+
+static QToolBar *createToolBar(const QWidget *someWidget)
+{
+    // Create
+    QToolBar *toolBar = new QToolBar;
+    toolBar->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
+    const int size = someWidget->style()->pixelMetric(QStyle::PM_SmallIconSize);
+    toolBar->setIconSize(QSize(size, size));
+    toolBar->addSeparator();
+
+    return toolBar;
+}
+
+QWidget *DiffEditorEditable::toolBar()
+{
+    if (m_toolWidget)
+        return m_toolWidget;
+
+    // Create
+    m_toolWidget = createToolBar(m_editorWidget);
+
+    QToolButton *whitespaceButton = new QToolButton(m_toolWidget);
+    whitespaceButton->setText(tr("Ignore Whitespaces"));
+    whitespaceButton->setCheckable(true);
+    whitespaceButton->setChecked(true);
+    connect(whitespaceButton, SIGNAL(clicked(bool)),
+            m_editorWidget, SLOT(setIgnoreWhitespaces(bool)));
+    m_toolWidget->addWidget(whitespaceButton);
+
+    QLabel *contextLabel = new QLabel(tr("Context Lines:"), m_toolWidget);
+    m_toolWidget->addWidget(contextLabel);
+
+    QSpinBox *contextSpinBox = new QSpinBox(m_toolWidget);
+    contextSpinBox->setRange(-1, 100);
+    contextSpinBox->setValue(3);
+    connect(contextSpinBox, SIGNAL(valueChanged(int)),
+            m_editorWidget, SLOT(setContextLinesNumber(int)));
+    m_toolWidget->addWidget(contextSpinBox);
+
+    return m_toolWidget;
+}
+
+QByteArray DiffEditorEditable::saveState() const
+{
+    return QByteArray();
+}
+
+bool DiffEditorEditable::restoreState(const QByteArray &state)
+{
+    Q_UNUSED(state)
+    return true;
+}
+
+} // namespace DiffEditor