diff --git a/shell/ktexteditorpluginintegration.cpp b/shell/ktexteditorpluginintegration.cpp
index c17a332db..3ff3cd2fd 100644
--- a/shell/ktexteditorpluginintegration.cpp
+++ b/shell/ktexteditorpluginintegration.cpp
@@ -1,354 +1,359 @@
 /*
     Copyright 2015 Milian Wolff <mail@milianw.de>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) version 3, or any
     later version accepted by the membership of KDE e.V. (or its
     successor approved by the membership of KDE e.V.), which shall
     act as a proxy defined in Section 6 of version 3 of the license.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include "ktexteditorpluginintegration.h"
 
 #include <QWidget>
 #include <QVBoxLayout>
 
 #include <KParts/MainWindow>
 #include <KTextEditor/View>
 #include <KTextEditor/Editor>
 #include <KTextEditor/Application>
 
 #include <sublime/area.h>
 #include <sublime/view.h>
 
 #include "core.h"
 #include "partcontroller.h"
 #include "uicontroller.h"
 #include "documentcontroller.h"
 #include "plugincontroller.h"
 #include "mainwindow.h"
 #include "textdocument.h"
 
 #include <util/objectlist.h>
 
 using namespace KDevelop;
 
 namespace {
 
 KTextEditor::MainWindow *toKteWrapper(KParts::MainWindow *window)
 {
     if (auto mainWindow = dynamic_cast<KDevelop::MainWindow*>(window)) {
         return mainWindow->kateWrapper() ? mainWindow->kateWrapper()->interface() : nullptr;
     } else {
         return nullptr;
     }
 }
 
 KTextEditor::View *toKteView(Sublime::View *view)
 {
     if (auto textView = dynamic_cast<KDevelop::TextView*>(view)) {
         return textView->textView();
     } else {
         return nullptr;
     }
 }
 
 class ToolViewFactory;
 
 /**
  * This HACK is required to massage the KTextEditor plugin API into the
  * GUI concepts we apply in KDevelop. Kate does not allow the user to
  * delete toolviews and then readd them. We do. To support our use case
  * we prevent the widget we return to KTextEditor plugins from
  * MainWindow::createToolView from getting destroyed. This widget class
  * unsets the parent of the so called container in its dtor. The
  * ToolViewFactory handles the ownership and destroys the kate widget
  * as needed.
  */
 class KeepAliveWidget : public QWidget
 {
     Q_OBJECT
 public:
     explicit KeepAliveWidget(ToolViewFactory *factory, QWidget *parent = nullptr)
         : QWidget(parent)
         , m_factory(factory)
     {
     }
 
     ~KeepAliveWidget() override;
 
 private:
     ToolViewFactory *m_factory;
 };
 
 class ToolViewFactory : public QObject, public KDevelop::IToolViewFactory
 {
     Q_OBJECT
 public:
     ToolViewFactory(const QString &text, const QIcon &icon, const QString &identifier,
                     KTextEditor::MainWindow::ToolViewPosition pos)
         : m_text(text)
         , m_icon(icon)
         , m_identifier(identifier)
         , m_container(new QWidget)
         , m_pos(pos)
     {
         m_container->setLayout(new QVBoxLayout);
     }
 
     ~ToolViewFactory() override
     {
         delete m_container;
     }
 
     QWidget *create(QWidget *parent = nullptr) override
     {
         auto widget = new KeepAliveWidget(this, parent);
         widget->setWindowTitle(m_text);
         widget->setWindowIcon(m_icon);
         widget->setLayout(new QVBoxLayout);
         widget->layout()->addWidget(m_container);
         widget->addActions(m_container->actions());
         return widget;
     }
 
     Qt::DockWidgetArea defaultPosition() override
     {
         switch (m_pos) {
             case KTextEditor::MainWindow::Left:
                 return Qt::LeftDockWidgetArea;
             case KTextEditor::MainWindow::Right:
                 return Qt::RightDockWidgetArea;
             case KTextEditor::MainWindow::Top:
                 return Qt::TopDockWidgetArea;
             case KTextEditor::MainWindow::Bottom:
                 return Qt::BottomDockWidgetArea;
         }
         Q_UNREACHABLE();
     }
 
     QString id() const override
     {
         return m_identifier;
     }
 
     QWidget *container() const
     {
         return m_container;
     }
 
 private:
     QString m_text;
     QIcon m_icon;
     QString m_identifier;
     QPointer<QWidget> m_container;
     KTextEditor::MainWindow::ToolViewPosition m_pos;
     friend class KeepAliveWidget;
 };
 
 KeepAliveWidget::~KeepAliveWidget()
 {
     // if the container is still valid, unparent it to prevent it from getting deleted
     // this happens when the user removes a toolview
     // on shutdown, the container does get deleted, thus we must guard against that.
     if (m_factory->container()) {
         Q_ASSERT(m_factory->container()->parentWidget() == this);
         m_factory->container()->setParent(nullptr);
     }
 }
 
 }
 
 namespace KTextEditorIntegration {
 
 Application::Application(QObject *parent)
     : QObject(parent)
 {
 }
 
 Application::~Application()
 {
     KTextEditor::Editor::instance()->setApplication(nullptr);
 }
 
 KTextEditor::MainWindow *Application::activeMainWindow() const
 {
     return toKteWrapper(Core::self()->uiController()->activeMainWindow());
 }
 
 QList<KTextEditor::MainWindow *> Application::mainWindows() const
 {
     return {activeMainWindow()};
 }
 
 bool Application::closeDocument(KTextEditor::Document *document) const
 {
     auto documentController = Core::self()->documentControllerInternal();
     return documentController->closeDocument(document->url());
 }
 
 KTextEditor::Plugin *Application::plugin(const QString &id) const
 {
     auto kdevPlugin = Core::self()->pluginController()->loadPlugin(id);
     const auto plugin = dynamic_cast<Plugin*>(kdevPlugin);
     return plugin ? plugin->interface() : nullptr;
 }
 
 MainWindow::MainWindow(KDevelop::MainWindow *mainWindow)
     : QObject(mainWindow)
     , m_mainWindow(mainWindow)
     , m_interface(new KTextEditor::MainWindow(this))
 {
     connect(mainWindow, &Sublime::MainWindow::viewAdded, this, [this] (Sublime::View *view) {
         if (auto kteView = toKteView(view)) {
             emit m_interface->viewCreated(kteView);
         }
     });
     connect(mainWindow, &Sublime::MainWindow::activeViewChanged, this, [this] (Sublime::View *view) {
         emit m_interface->viewChanged(toKteView(view));
     });
 }
 
 MainWindow::~MainWindow() = default;
 
 QWidget *MainWindow::createToolView(KTextEditor::Plugin* plugin, const QString &identifier,
                                     KTextEditor::MainWindow::ToolViewPosition pos,
                                     const QIcon &icon, const QString &text)
 {
     auto factory = new ToolViewFactory(text, icon, identifier, pos);
     Core::self()->uiController()->addToolView(text, factory);
     connect(plugin, &QObject::destroyed, this, [=] {
         Core::self()->uiController()->removeToolView(factory);
     });
     return factory->container();
 }
 
 KXMLGUIFactory *MainWindow::guiFactory() const
 {
     return m_mainWindow->guiFactory();
 }
 
 QWidget *MainWindow::window() const
 {
     return m_mainWindow;
 }
 
 QList<KTextEditor::View *> MainWindow::views() const
 {
     QList<KTextEditor::View *> views;
     foreach (auto area, m_mainWindow->areas()) {
         foreach (auto view, area->views()) {
             if (auto kteView = toKteView(view)) {
                 views << kteView;
             }
         }
     }
     return views;
 }
 
 KTextEditor::View *MainWindow::activeView() const
 {
     return toKteView(m_mainWindow->activeView());
 }
 
 QObject *MainWindow::pluginView(const QString &id) const
 {
     return m_pluginViews.value(id);
 }
 
 QWidget *MainWindow::createViewBar(KTextEditor::View* view)
 {
     Q_UNUSED(view);
     // TODO
     return nullptr;
 }
 
 void MainWindow::deleteViewBar(KTextEditor::View* view)
 {
     Q_UNUSED(view);
     // TODO
 }
 
 KTextEditor::MainWindow *MainWindow::interface() const
 {
     return m_interface;
 }
 
 void MainWindow::addPluginView(const QString &id, QObject *view)
 {
     m_pluginViews.insert(id, view);
     emit m_interface->pluginViewCreated(id, view);
 }
 
 void MainWindow::removePluginView(const QString &id)
 {
     auto view = m_pluginViews.take(id).data();
     delete view;
     emit m_interface->pluginViewDeleted(id, view);
 }
 
 Plugin::Plugin(KTextEditor::Plugin *plugin, QObject *parent)
     : IPlugin({}, parent)
     , m_plugin(plugin)
     , m_tracker(new ObjectListTracker(ObjectListTracker::CleanupWhenDone, this))
 {
 }
 
 Plugin::~Plugin() = default;
 
 void Plugin::unload()
 {
     if (auto mainWindow = KTextEditor::Editor::instance()->application()->activeMainWindow()) {
         auto integration = dynamic_cast<MainWindow*>(mainWindow->parent());
         if (integration) {
             integration->removePluginView(pluginId());
         }
     }
     m_tracker->deleteAll();
     delete m_plugin;
 }
 
 KXMLGUIClient *Plugin::createGUIForMainWindow(Sublime::MainWindow* window)
 {
     auto ret = IPlugin::createGUIForMainWindow(window);
     auto mainWindow = dynamic_cast<KDevelop::MainWindow*>(window);
     Q_ASSERT(mainWindow);
 
     auto wrapper = mainWindow->kateWrapper();
     auto view = m_plugin->createView(wrapper->interface());
     wrapper->addPluginView(pluginId(), view);
     // ensure that unloading the plugin kills all views
     m_tracker->append(view);
 
     return ret;
 }
 
 KTextEditor::Plugin *Plugin::interface() const
 {
     return m_plugin.data();
 }
 
 QString Plugin::pluginId() const
 {
     return Core::self()->pluginController()->pluginInfo(this).pluginId();
 }
 
 void initialize()
 {
     auto app = new KTextEditor::Application(new Application(Core::self()));
     KTextEditor::Editor::instance()->setApplication(app);
 }
 
+void MainWindow::splitView(Qt::Orientation orientation)
+{
+    m_mainWindow->split(orientation);
+}
+
 }
 
 #include "ktexteditorpluginintegration.moc"
diff --git a/shell/ktexteditorpluginintegration.h b/shell/ktexteditorpluginintegration.h
index d11cf0ff4..7152fdfa0 100644
--- a/shell/ktexteditorpluginintegration.h
+++ b/shell/ktexteditorpluginintegration.h
@@ -1,121 +1,122 @@
 /*
     Copyright 2015 Milian Wolff <mail@milianw.de>
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Lesser General Public
     License as published by the Free Software Foundation; either
     version 2.1 of the License, or (at your option) version 3, or any
     later version accepted by the membership of KDE e.V. (or its
     successor approved by the membership of KDE e.V.), which shall
     act as a proxy defined in Section 6 of version 3 of the license.
 
     This library is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
 
     You should have received a copy of the GNU Lesser General Public
     License along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #ifndef KDEVPLATFORM_KTEXTEDITOR_PLUGIN_INTEGRATION_H
 #define KDEVPLATFORM_KTEXTEDITOR_PLUGIN_INTEGRATION_H
 
 #include <QObject>
 #include <QVector>
 #include <QPointer>
 
 #include <KTextEditor/MainWindow>
 #include <KTextEditor/Plugin>
 
 #include <interfaces/iplugin.h>
 
 namespace KDevelop {
 class ObjectListTracker;
 class MainWindow;
 }
 
 namespace KTextEditorIntegration {
 
 /**
  * Class mimicking the KTextEditor::Application interface
  */
 class Application : public QObject
 {
     Q_OBJECT
 public:
     explicit Application(QObject *parent = nullptr);
     ~Application() override;
 
 public slots:
     KTextEditor::MainWindow *activeMainWindow() const;
     QList<KTextEditor::MainWindow *> mainWindows() const;
 
     KTextEditor::Plugin *plugin(const QString &id) const;
 
     bool closeDocument(KTextEditor::Document *document) const;
 };
 
 class MainWindow : public QObject
 {
     Q_OBJECT
 public:
     explicit MainWindow(KDevelop::MainWindow *mainWindow);
     ~MainWindow() override;
 
 public slots:
     QWidget *createToolView(KTextEditor::Plugin *plugin, const QString &identifier,
                             KTextEditor::MainWindow::ToolViewPosition pos,
                             const QIcon &icon, const QString &text);
 
     KXMLGUIFactory *guiFactory() const;
 
     QWidget *window() const;
 
     QList<KTextEditor::View *> views() const;
 
     KTextEditor::View *activeView() const;
 
     QObject *pluginView(const QString &id) const;
+    void splitView(Qt::Orientation orientation);
 
     QWidget *createViewBar(KTextEditor::View *view);
 
     void deleteViewBar(KTextEditor::View *view);
 
 public:
     KTextEditor::MainWindow *interface() const;
 
     void addPluginView(const QString &id, QObject *pluginView);
     void removePluginView(const QString &id);
 
 private:
     KDevelop::MainWindow *m_mainWindow;
     KTextEditor::MainWindow *m_interface;
     QHash<QString, QPointer<QObject>> m_pluginViews;
 };
 
 class Plugin : public KDevelop::IPlugin
 {
     Q_OBJECT
 public:
     explicit Plugin(KTextEditor::Plugin *plugin, QObject *parent = nullptr);
     ~Plugin() override;
 
     KXMLGUIClient* createGUIForMainWindow(Sublime::MainWindow *window) override;
 
     void unload() override;
 
     KTextEditor::Plugin *interface() const;
 
     QString pluginId() const;
 
 private:
     QPointer<KTextEditor::Plugin> m_plugin;
     // view objects and toolviews that should get deleted when the plugin gets unloaded
     KDevelop::ObjectListTracker *m_tracker;
 };
 
 void initialize();
 
 }
 #endif
diff --git a/shell/mainwindow.cpp b/shell/mainwindow.cpp
index 95d7ff7f9..3174aa9fe 100644
--- a/shell/mainwindow.cpp
+++ b/shell/mainwindow.cpp
@@ -1,513 +1,518 @@
 /* This file is part of the KDevelop project
 Copyright 2002 Falk Brettschneider <falkbr@kdevelop.org>
 Copyright 2003 John Firebaugh <jfirebaugh@kde.org>
 Copyright 2006 Adam Treat <treat@kde.org>
 Copyright 2006, 2007 Alexander Dymo <adymo@kdevelop.org>
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Library General Public
 License as published by the Free Software Foundation; either
 version 2 of the License, or (at your option) any later version.
 
 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Library General Public License for more details.
 
 You should have received a copy of the GNU Library General Public License
 along with this library; see the file COPYING.LIB.  If not, write to
 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.
 */
 #include "mainwindow.h"
 #include "mainwindow_p.h"
 
 #include <QDBusConnection>
 #include <QDomDocument>
 #include <QDragEnterEvent>
 #include <QDropEvent>
 #include <QMenu>
 #include <QMenuBar>
 #include <QMimeData>
 #include <QUrl>
 
 #include <KActionCollection>
 #include <KLocalizedString>
 #include <KShortcutsDialog>
 #include <KTextEditor/Document>
 #include <KTextEditor/View>
 #include <KTextEditor/MainWindow>
 #include <KWindowSystem>
 #include <KXMLGUIFactory>
 #include <kparts_version.h>
 
 #include <sublime/area.h>
 #include "shellextension.h"
 #include "partcontroller.h"
 #include "plugincontroller.h"
 #include "projectcontroller.h"
 #include "uicontroller.h"
 #include "documentcontroller.h"
 #include "debugcontroller.h"
 #include "workingsetcontroller.h"
 #include "sessioncontroller.h"
 #include "sourceformattercontroller.h"
 #include "areadisplay.h"
 #include "project.h"
 #include "debug.h"
 #include "uiconfig.h"
 
 #include <interfaces/isession.h>
 #include <interfaces/iprojectcontroller.h>
 #include <vcs/interfaces/ibasicversioncontrol.h>
 #include <sublime/view.h>
 #include <sublime/document.h>
 #include <sublime/urldocument.h>
 #include <sublime/container.h>
 #include <util/path.h>
 #include <util/widgetcolorizer.h>
 
 using namespace KDevelop;
 
 namespace {
 
 QColor defaultColor(const QPalette& palette)
 {
     return palette.foreground().color();
 }
 
 QColor colorForDocument(const QUrl& url, const QPalette& palette, const QColor& defaultColor)
 {
     auto project = Core::self()->projectController()->findProjectForUrl(url);
     if (!project)
         return defaultColor;
 
     return WidgetColorizer::colorForId(qHash(project->path()), palette);
 }
 
 }
 
 void MainWindow::applyMainWindowSettings(const KConfigGroup& config)
 {
     if(!d->changingActiveView())
         KXmlGuiWindow::applyMainWindowSettings(config);
 }
 
 void MainWindow::createGUI(KParts::Part* part)
 {
     //TODO remove if-clause once KF5 >= 5.24 is required
 #if KPARTS_VERSION_MINOR >= 24
     Sublime::MainWindow::setWindowTitleHandling(false);
     Sublime::MainWindow::createGUI(part);
 #else
     Sublime::MainWindow::createGUI(part);
     if (part) {
         // Don't let the Part control the main window caption -- we take care of that
         disconnect(part, SIGNAL(setWindowCaption(QString)),
                    this, SLOT(setCaption(QString)));
     }
 #endif
 }
 
 void MainWindow::initializeCorners()
 {
     const KConfigGroup cg = KSharedConfig::openConfig()->group( "UiSettings" );
     const int bottomleft = cg.readEntry( "BottomLeftCornerOwner", 0 );
     const int bottomright = cg.readEntry( "BottomRightCornerOwner", 0 );
     qCDebug(SHELL) << "Bottom Left:" << bottomleft;
     qCDebug(SHELL) << "Bottom Right:" << bottomright;
 
     // 0 means vertical dock (left, right), 1 means horizontal dock( top, bottom )
     if( bottomleft == 0 )
         setCorner( Qt::BottomLeftCorner, Qt::LeftDockWidgetArea );
     else if( bottomleft == 1 )
         setCorner( Qt::BottomLeftCorner, Qt::BottomDockWidgetArea );
 
     if( bottomright == 0 )
         setCorner( Qt::BottomRightCorner, Qt::RightDockWidgetArea );
     else if( bottomright == 1 )
         setCorner( Qt::BottomRightCorner, Qt::BottomDockWidgetArea );
 }
 
 MainWindow::MainWindow( Sublime::Controller *parent, Qt::WindowFlags flags )
         : Sublime::MainWindow( parent, flags )
 {
     QDBusConnection::sessionBus().registerObject( QStringLiteral("/kdevelop/MainWindow"),
         this, QDBusConnection::ExportScriptableSlots );
 
     setAcceptDrops( true );
     initializeCorners();
 
     setObjectName( QStringLiteral("MainWindow") );
     d = new MainWindowPrivate(this);
 
     setStandardToolBarMenuEnabled( true );
     d->setupActions();
 
     if( !ShellExtension::getInstance()->xmlFile().isEmpty() )
     {
         setXMLFile( ShellExtension::getInstance() ->xmlFile() );
     }
 
     menuBar()->setCornerWidget(new AreaDisplay(this), Qt::TopRightCorner);
 }
 
 MainWindow::~ MainWindow()
 {
     if (memberList().count() == 1) {
         // We're closing down...
         Core::self()->shutdown();
     }
 
     delete d;
 }
 
 KTextEditorIntegration::MainWindow *MainWindow::kateWrapper() const
 {
     return d->kateWrapper();
 }
 
+void MainWindow::split(Qt::Orientation orientation)
+{
+    d->split(orientation);
+}
+
 void MainWindow::ensureVisible()
 {
     if (isMinimized()) {
         if (isMaximized()) {
             showMaximized();
         } else {
             showNormal();
         }
     }
     KWindowSystem::forceActiveWindow(winId());
 }
 
 QAction* MainWindow::createCustomElement(QWidget* parent, int index, const QDomElement& element)
 {
     QAction* before = nullptr;
     if (index > 0 && index < parent->actions().count())
         before = parent->actions().at(index);
 
     //KDevelop needs to ensure that separators defined as <Separator style="visible" />
     //are always shown in the menubar. For those, we create special disabled actions
     //instead of calling QMenuBar::addSeparator() because menubar separators are ignored
     if (element.tagName().toLower() == QLatin1String("separator")
             && element.attribute(QStringLiteral("style")) == QLatin1String("visible")) {
         if ( QMenuBar* bar = qobject_cast<QMenuBar*>( parent ) ) {
             QAction *separatorAction = new QAction(QStringLiteral("|"), this);
             bar->insertAction( before, separatorAction );
             separatorAction->setDisabled(true);
             return separatorAction;
         }
     }
 
     return KXMLGUIBuilder::createCustomElement(parent, index, element);
 }
 
 void MainWindow::dragEnterEvent( QDragEnterEvent* ev )
 {
     const QMimeData* mimeData = ev->mimeData();
     if (mimeData->hasUrls()) {
         ev->acceptProposedAction();
     } else if (mimeData->hasText()) {
         // also take text which contains a URL
         const QUrl url = QUrl::fromUserInput(mimeData->text());
         if (url.isValid()) {
             ev->acceptProposedAction();
         }
     }
 }
 
 void MainWindow::dropEvent( QDropEvent* ev )
 {
     Sublime::View* dropToView = viewForPosition(mapToGlobal(ev->pos()));
     if(dropToView)
         activateView(dropToView);
 
     QList<QUrl> urls;
 
     const QMimeData* mimeData = ev->mimeData();
     if (mimeData->hasUrls()) {
         urls = mimeData->urls();
     } else if (mimeData->hasText()) {
         const QUrl url = QUrl::fromUserInput(mimeData->text());
         if (url.isValid()) {
             urls << url;
         }
     }
 
     bool eventUsed = false;
     if (urls.size() == 1) {
         const QUrl& url = urls.at(0);
         // TODO: query also projectprovider plugins, and that before plain vcs plugins
         // e.g. KDE provider plugin could catch URLs from mirror or pickup kde:repo things
 
         auto* pluginController = Core::self()->pluginController();
         const auto& plugins = pluginController->allPluginsForExtension(QStringLiteral("org.kdevelop.IBasicVersionControl"));
 
         for (auto* plugin : plugins) {
             auto* iface = plugin->extension<IBasicVersionControl>();
             if (iface->isValidRemoteRepositoryUrl(url)) {
                 Core::self()->projectControllerInternal()->fetchProjectFromUrl(url, plugin);
                 eventUsed = true;
                 break;
             }
         }
     }
 
     if (!eventUsed) {
         for(const auto& url : urls) {
             Core::self()->documentController()->openDocument(url);
         }
     }
 
     ev->acceptProposedAction();
 }
 
 void MainWindow::loadSettings()
 {
     qCDebug(SHELL) << "Loading Settings";
     initializeCorners();
 
     updateAllTabColors();
 
     Sublime::MainWindow::loadSettings();
 }
 
 void MainWindow::configureShortcuts()
 {
     ///Workaround for a problem with the actions: Always start the shortcut-configuration in the first mainwindow, then propagate the updated
     ///settings into the other windows
 
 
 // We need to bring up the shortcut dialog ourself instead of
 //      Core::self()->uiControllerInternal()->mainWindows()[0]->guiFactory()->configureShortcuts();
 // so we can connect to the saved() signal to propagate changes in the editor shortcuts
 
    KShortcutsDialog dlg(KShortcutsEditor::AllActions, KShortcutsEditor::LetterShortcutsAllowed, this);
     foreach (KXMLGUIClient *client, Core::self()->uiControllerInternal()->mainWindows()[0]->guiFactory()->clients())
     {
         if(client && !client->xmlFile().isEmpty())
             dlg.addCollection( client->actionCollection() );
     }
 
     connect(&dlg, &KShortcutsDialog::saved, this, &MainWindow::shortcutsChanged);
     dlg.configure(true);
 
     QMap<QString, QKeySequence> shortcuts;
     foreach(KXMLGUIClient* client, Core::self()->uiControllerInternal()->mainWindows()[0]->guiFactory()->clients()) {
         foreach(QAction* action, client->actionCollection()->actions()) {
             if(!action->objectName().isEmpty()) {
                 shortcuts[action->objectName()] = action->shortcut();
             }
         }
     }
 
     for(int a = 1; a < Core::self()->uiControllerInternal()->mainWindows().size(); ++a) {
         foreach(KXMLGUIClient* client, Core::self()->uiControllerInternal()->mainWindows()[a]->guiFactory()->clients()) {
             foreach(QAction* action, client->actionCollection()->actions()) {
                 qCDebug(SHELL) << "transferring setting shortcut for" << action->objectName();
                 if(shortcuts.contains(action->objectName())) {
                     action->setShortcut(shortcuts[action->objectName()]);
                 }
             }
         }
     }
 
 }
 
 void MainWindow::shortcutsChanged()
 {
     KTextEditor::View *activeClient = Core::self()->documentController()->activeTextDocumentView();
     if(!activeClient)
         return;
 
     foreach(IDocument * doc, Core::self()->documentController()->openDocuments()) {
         KTextEditor::Document *textDocument = doc->textDocument();
         if (textDocument) {
             foreach(KTextEditor::View *client, textDocument->views()) {
                 if (client != activeClient) {
                     client->reloadXML();
                 }
             }
         }
     }
 }
 
 
 void MainWindow::initialize()
 {
     KStandardAction::keyBindings(this, SLOT(configureShortcuts()), actionCollection());
     setupGUI( KXmlGuiWindow::ToolBar | KXmlGuiWindow::Create | KXmlGuiWindow::Save );
 
     Core::self()->partController()->addManagedTopLevelWidget(this);
     qCDebug(SHELL) << "Adding plugin-added connection";
 
     connect( Core::self()->pluginController(), &IPluginController::pluginLoaded,
              d, &MainWindowPrivate::addPlugin);
     connect( Core::self()->pluginController(), &IPluginController::pluginUnloaded,
              d, &MainWindowPrivate::removePlugin);
     connect( Core::self()->partController(), &IPartController::activePartChanged,
         d, &MainWindowPrivate::activePartChanged);
     connect( this, &MainWindow::activeViewChanged,
         d, &MainWindowPrivate::changeActiveView);
 
     foreach(IPlugin* plugin, Core::self()->pluginController()->loadedPlugins())
         d->addPlugin(plugin);
 
     guiFactory()->addClient(Core::self()->sessionController());
     guiFactory()->addClient(Core::self()->sourceFormatterControllerInternal());
 
     // Needed to re-plug the actions from the sessioncontroller as xmlguiclients don't
     // seem to remember which actions where plugged in.
     Core::self()->sessionController()->updateXmlGuiActionList();
 
     d->setupGui();
 
     //Queued so we process it with some delay, to make sure the rest of the UI has already adapted
     connect(Core::self()->documentController(), &IDocumentController::documentActivated, this, &MainWindow::updateCaption, Qt::QueuedConnection);
     connect(Core::self()->documentController(), &IDocumentController::documentActivated, this, &MainWindow::updateActiveDocumentConnection, Qt::QueuedConnection);
     connect(Core::self()->documentController(), &IDocumentController::documentClosed, this, &MainWindow::updateCaption, Qt::QueuedConnection);
     connect(Core::self()->documentController(), &IDocumentController::documentUrlChanged, this, &MainWindow::updateCaption, Qt::QueuedConnection);
     connect(Core::self()->sessionController()->activeSession(), &ISession::sessionUpdated, this, &MainWindow::updateCaption);
 
     connect(Core::self()->documentController(), &IDocumentController::documentOpened, this, &MainWindow::updateTabColor);
     connect(Core::self()->documentController(), &IDocumentController::documentUrlChanged, this, &MainWindow::updateTabColor);
     connect(this, &Sublime::MainWindow::viewAdded, this, &MainWindow::updateAllTabColors);
     connect(Core::self()->projectController(), &ProjectController::projectOpened, this, &MainWindow::updateAllTabColors, Qt::QueuedConnection);
 
     updateCaption();
 }
 
 void MainWindow::cleanup()
 {
 }
 
 void MainWindow::setVisible( bool visible )
 {
     KXmlGuiWindow::setVisible( visible );
     emit finishedLoading();
 }
 
 bool MainWindow::queryClose()
 {
     if (!Core::self()->documentControllerInternal()->saveAllDocumentsForWindow(this, IDocument::Default))
         return false;
 
     return Sublime::MainWindow::queryClose();
 }
 
 void MainWindow::updateActiveDocumentConnection(IDocument* document)
 {
     disconnect(d->activeDocumentReadWriteConnection);
     if (auto textDocument = document->textDocument()) {
         d->activeDocumentReadWriteConnection = connect(textDocument, &KTextEditor::Document::readWriteChanged,
                                                        this, &MainWindow::updateCaption);
     }
 }
 
 void MainWindow::updateCaption()
 {
     const auto activeSession = Core::self()->sessionController()->activeSession();
     QString title = activeSession ? activeSession->description() : QString();
 
     if(area()->activeView())
     {
         if(!title.isEmpty())
             title += QLatin1String(" - [ ");
 
         Sublime::Document* doc = area()->activeView()->document();
         Sublime::UrlDocument* urlDoc = dynamic_cast<Sublime::UrlDocument*>(doc);
         if(urlDoc)
             title += Core::self()->projectController()->prettyFileName(urlDoc->url(), KDevelop::IProjectController::FormatPlain);
         else
             title += doc->title();
 
         auto activeDocument = Core::self()->documentController()->activeDocument();
         if (activeDocument && activeDocument->textDocument() && !activeDocument->textDocument()->isReadWrite())
             title += i18n(" (read only)");
 
         title += QLatin1String(" ]");
     }
 
     setCaption(title);
 }
 
 void MainWindow::updateAllTabColors()
 {
     auto documentController = Core::self()->documentController();
     if (!documentController)
         return;
 
     const auto defaultColor = ::defaultColor(palette());
     if (UiConfig::colorizeByProject()) {
         QHash<const Sublime::View*, QColor> viewColors;
         foreach (auto container, containers()) {
             auto views = container->views();
             viewColors.reserve(views.size());
             viewColors.clear();
             foreach (auto view, views) {
                 const auto urlDoc = qobject_cast<Sublime::UrlDocument*>(view->document());
                 if (urlDoc) {
                     viewColors[view] = colorForDocument(urlDoc->url(), palette(), defaultColor);
                 }
             }
             container->setTabColors(viewColors);
         }
     } else {
         foreach (auto container, containers()) {
             container->resetTabColors(defaultColor);
         }
     }
 }
 
 void MainWindow::updateTabColor(IDocument* doc)
 {
     if (!UiConfig::self()->colorizeByProject())
         return;
 
     const auto color = colorForDocument(doc->url(), palette(), defaultColor(palette()));
     foreach (auto container, containers()) {
         foreach (auto view, container->views()) {
             const auto urlDoc = qobject_cast<Sublime::UrlDocument*>(view->document());
             if (urlDoc && urlDoc->url() == doc->url()) {
                 container->setTabColor(view, color);
             }
         }
     }
 }
 
 void MainWindow::registerStatus(QObject* status)
 {
     d->registerStatus(status);
 }
 
 void MainWindow::initializeStatusBar()
 {
     d->setupStatusBar();
 }
 
 void MainWindow::showErrorMessage(const QString& message, int timeout)
 {
     d->showErrorMessage(message, timeout);
 }
 
 void MainWindow::tabContextMenuRequested(Sublime::View* view, QMenu* menu)
 {
     Sublime::MainWindow::tabContextMenuRequested(view, menu);
     d->tabContextMenuRequested(view, menu);
 }
 
 void MainWindow::tabToolTipRequested(Sublime::View* view, Sublime::Container* container, int tab)
 {
     d->tabToolTipRequested(view, container, tab);
 }
 
 void MainWindow::dockBarContextMenuRequested(Qt::DockWidgetArea area, const QPoint& position)
 {
     d->dockBarContextMenuRequested(area, position);
 }
 
 void MainWindow::newTabRequested()
 {
     Sublime::MainWindow::newTabRequested();
 
     d->fileNew();
 }
diff --git a/shell/mainwindow.h b/shell/mainwindow.h
index 8340064ee..1ed1b0c7a 100644
--- a/shell/mainwindow.h
+++ b/shell/mainwindow.h
@@ -1,118 +1,119 @@
 /* This file is part of the KDevelop project
 Copyright 2003 Falk Brettschneider <falkbr@kdevelop.org>
 Copyright 2003 John Firebaugh <jfirebaugh@kde.org>
 Copyright 2003 Amilcar do Carmo Lucas <amilcar@kdevelop.org>
 Copyright 2004, 2007 Alexander Dymo <adymo@kdevelop.org>
 Copyright 2006 Adam Treat <treat@kde.org>
 
 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Library General Public
 License as published by the Free Software Foundation; either
 version 2 of the License, or (at your option) any later version.
 
 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Library General Public License for more details.
 
 You should have received a copy of the GNU Library General Public License
 along with this library; see the file COPYING.LIB.  If not, write to
 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 Boston, MA 02110-1301, USA.
 */
 #ifndef KDEVPLATFORM_MAINWINDOW_H
 #define KDEVPLATFORM_MAINWINDOW_H
 
 #include <KXmlGuiWindow>
 
 #include <sublime/mainwindow.h>
 
 #include "shellexport.h"
 
 namespace KTextEditor {
 class View;
 }
 
 namespace KTextEditorIntegration {
 class MainWindow;
 }
 
 namespace KDevelop
 {
 
 class IDocument;
 
 /**
 KDevelop main window.
 Provides methods to control the main window of an application.
 */
 class KDEVPLATFORMSHELL_EXPORT MainWindow: public Sublime::MainWindow {
     friend class UiController;
     Q_OBJECT
     Q_CLASSINFO( "D-Bus Interface", "org.kdevelop.MainWindow" )
 public:
     explicit MainWindow( Sublime::Controller *parent = nullptr, Qt::WindowFlags flags = KDE_DEFAULT_WINDOWFLAGS );
     ~MainWindow() override;
 
     /*! @p status must implement KDevelop::IStatus */
     void registerStatus(QObject* status);
     KTextEditorIntegration::MainWindow *kateWrapper() const;
+    void split(Qt::Orientation orientation);
 
 public Q_SLOTS:
     /*! Shows an error message in the status bar.
         @p message The message
         @p timeout The timeout in milliseconds how long to show the message */
     void showErrorMessage(const QString& message, int timeout);
 
     virtual Q_SCRIPTABLE void ensureVisible();
     virtual Q_SCRIPTABLE QString windowTitle() {
         return Sublime::MainWindow::windowTitle();
     }
 
     void setVisible( bool visible ) override;
     void configureShortcuts();
     void loadSettings() override;
 
 Q_SIGNALS:
     void finishedLoading();
 
 protected:
     //FIXME DOCUMENT!!!  queryClose() must call all of the Core cleanup() methods!
     bool queryClose() override;
     //reimplemented from KXMLGUIBuilder to support visible menubar separators
     QAction *createCustomElement(QWidget *parent, int index, const QDomElement &element) override;
 
     virtual void initialize();
     virtual void cleanup();
     void initializeStatusBar() override;
     void dragEnterEvent( QDragEnterEvent* ) override;
     void dropEvent( QDropEvent* ) override;
     void applyMainWindowSettings(const KConfigGroup& config) override;
     void createGUI(KParts::Part* part);
 
 protected Q_SLOTS:
     void tabContextMenuRequested(Sublime::View* , QMenu* ) override;
     void tabToolTipRequested(Sublime::View* view, Sublime::Container* container, int tab) override;
     void dockBarContextMenuRequested(Qt::DockWidgetArea, const QPoint&) override;
     void newTabRequested() override;
 
 private Q_SLOTS:
     void updateCaption();
     void updateActiveDocumentConnection(IDocument* document);
 
     void updateTabColor(IDocument* doc);
     void updateAllTabColors();
 
     void shortcutsChanged();
 
 private:
     void initializeCorners();
 
     class MainWindowPrivate *d;
     friend class MainWindowPrivate;
 };
 
 }
 
 #endif