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diff --git a/sd/source/ui/inc/ViewShellBase.hxx b/sd/source/ui/inc/ViewShellBase.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_SD_SOURCE_UI_INC_VIEWSHELLBASE_HXX
+#define INCLUDED_SD_SOURCE_UI_INC_VIEWSHELLBASE_HXX
+
+#include <glob.hxx>
+#include <sfx2/viewsh.hxx>
+#include <memory>
+
+class SdDrawDocument;
+class SfxRequest;
+
+namespace sd::tools {
+class EventMultiplexer;
+}
+
+namespace sd {
+
+class DrawController;
+class DrawDocShell;
+class FormShellManager;
+class ToolBarManager;
+class ViewShell;
+class ViewShellManager;
+class ViewTabBar;
+
+/** SfxViewShell descendant that the stacked Draw/Impress shells are
+    based on.
+
+    <p>The "base" part of the name does not mean that this is a base
+    class of some class hierarchy.  It rather is the base of the
+    stacked shells.</p>
+
+    <p>This class starts as a new and relatively small class.  Over
+    time as much code as possible should be moved from the stacked
+    shells to this class.</p>
+*/
+class ViewShellBase
+    : public SfxViewShell
+{
+public:
+    SFX_DECL_INTERFACE(SD_IF_SDVIEWSHELLBASE)
+
+private:
+    /// SfxInterface initializer.
+    static void InitInterface_Impl();
+
+public:
+    /** This constructor is used by the view factory of the SFX macros.
+        Note that LateInit() has to be called after the constructor
+        terminates and before doing anything else.
+    */
+    ViewShellBase (
+        SfxViewFrame *pFrame,
+        SfxViewShell* pOldShell);
+
+    virtual ~ViewShellBase() override;
+
+    /** This method is part of the object construction.  It HAS to be called
+        after the constructor has created a new object.
+    */
+    void LateInit (const OUString& rsDefaultView);
+
+    std::shared_ptr<ViewShellManager> const & GetViewShellManager() const;
+
+    /** Return the main view shell stacked on the called ViewShellBase
+        object.  This is usually the view shell displayed in the center
+        pane.
+    */
+    std::shared_ptr<ViewShell> GetMainViewShell() const;
+
+    /** When given a view frame this static method returns the
+        corresponding sd::ViewShellBase object.
+        @return
+            When the SfxViewShell of the given frame is not a
+            ViewShellBase object then NULL is returned.
+    */
+    static ViewShellBase* GetViewShellBase (SfxViewFrame const * pFrame);
+
+    DrawDocShell* GetDocShell() const { return mpDocShell;}
+    SdDrawDocument* GetDocument() const { return mpDocument;}
+
+    /** Callback function for general slot calls.  At the moment these are
+        slots for switching the pane docking windows on and off.
+    */
+    virtual void Execute (SfxRequest& rRequest);
+
+    /** Callback function for retrieving item values related to certain
+        slots.  This is the companion of Execute() and handles the slots
+        concerned with showing the pane docking windows.
+    */
+    void GetState (SfxItemSet& rSet);
+
+    /* override these from SfxViewShell */
+    virtual OUString GetSelectionText(bool = false) override;
+    virtual bool HasSelection(bool = true ) const override;
+
+    SvBorder GetBorder (bool bOuterResize);
+    virtual void InnerResizePixel (const Point& rOrigin, const Size& rSize, bool inplaceEditModeChange) override;
+    virtual void OuterResizePixel (const Point& rOrigin, const Size& rSize) override;
+
+    /** This call is forwarded to the main sub-shell.
+    */
+    virtual ErrCode DoVerb (long nVerb) override;
+
+    /** Return a new renderer that can be used for example for printing the
+        document.
+    */
+    virtual css::uno::Reference<css::view::XRenderable> GetRenderable() override;
+
+    /// Forwarded to the print manager.
+    virtual SfxPrinter* GetPrinter (bool bCreate = false) override;
+
+    /// Forwarded to the print manager.
+    virtual sal_uInt16 SetPrinter (
+        SfxPrinter* pNewPrinter,
+        SfxPrinterChangeFlags nDiffFlags = SFX_PRINTER_ALL) override;
+
+    /// Forward methods to main sub shell.
+    virtual void WriteUserDataSequence (
+        css::uno::Sequence< css::beans::PropertyValue >&) override;
+
+    /** Pass the given properties to the main view shell.  After that we
+        ensure that the right view shell type is displayed in the center
+        pane.
+    */
+    virtual void ReadUserDataSequence (
+        const css::uno::Sequence< css::beans::PropertyValue >&) override;
+
+    virtual void UIActivating( SfxInPlaceClient* ) override;
+    virtual void UIDeactivated( SfxInPlaceClient* ) override;
+    virtual void Activate (bool IsMDIActivate) override;
+    using SfxViewShell::Deactivate;
+    virtual void SetZoomFactor (
+        const Fraction &rZoomX,
+        const Fraction &rZoomY) override;
+    virtual bool PrepareClose (bool bUI = true) override;
+    virtual void WriteUserData (OUString&, bool bBrowse = false) override;
+    virtual void ReadUserData (const OUString&, bool bBrowse = false) override;
+    virtual SdrView* GetDrawView() const override;
+
+    /** When <TRUE/> is given, then the mouse shape is set to hour glass (or
+        whatever the busy shape looks like on the system.)
+    */
+    void SetBusyState (bool bBusy);
+
+    /** Call this method when the controls of this view shell or the
+        embedded sub shell need to be rearranged.  This is necessary
+        e.g. when the border has been modified (UpdateBorder() calls this
+        method).
+
+        This method is like ResizePixel() with no arguments.
+    */
+    void Rearrange();
+
+    /** Update the border that is set with SfxViewShell::SetBorderPixel().
+        This is done by adding the border used by the ViewShellBase itself
+        with the border used by the main view shell.
+
+        @param bForce   if true the borders are also updated if old border
+                        and new border are same.
+    */
+    void UpdateBorder ( bool bForce = false );
+
+    /** With this method the UI controls can be turned on or off.  It is
+        used by the FuSlideShow to hide the UI controls while showing a
+        non-full-screen or in-window presentation in the center pane.
+    */
+    void ShowUIControls (bool bVisible);
+
+    /** Return an event multiplexer.  It is a single class that forwards
+        events from various sources.  This method must not be called before
+        LateInit() has terminated.
+    */
+    std::shared_ptr<tools::EventMultiplexer> const & GetEventMultiplexer() const;
+
+    /** returns the complete area of the current view relative to the frame
+        window
+    */
+    const ::tools::Rectangle& getClientRectangle() const;
+
+    std::shared_ptr<ToolBarManager> const & GetToolBarManager() const;
+    std::shared_ptr<FormShellManager> const & GetFormShellManager() const;
+
+    DrawController& GetDrawController() const;
+
+    void SetViewTabBar (const ::rtl::Reference<ViewTabBar>& rViewTabBar);
+
+    /** Return the window that is used by the main view shell to display its
+        view and other UI elements, like scroll bars and rulers.  Ownership
+        of that window remains with the called ViewShellBase object.
+    */
+    vcl::Window* GetViewWindow();
+
+    /** returns the ui descriptive name for the given uno slot. The result is taken from the configuration
+        and not cached, so do not use it excessive (f.e. in status updates) */
+    OUString RetrieveLabelFromCommand( const OUString& aCmdURL ) const;
+    /// See SfxViewShell::getPart().
+    int getPart() const override;
+    /// See SfxViewShell::NotifyCursor().
+    void NotifyCursor(SfxViewShell* pViewShell) const override;
+
+protected:
+
+    virtual void Notify(SfxBroadcaster& rBC, const SfxHint& rHint) override;
+
+    virtual void InitializeFramework();
+
+private:
+    class Implementation;
+    std::unique_ptr<Implementation> mpImpl;
+    DrawDocShell* mpDocShell;
+    SdDrawDocument* mpDocument;
+
+    /** Determine from the properties of the document shell the initial type
+        of the view shell in the center pane.  We use this method to avoid
+        starting with the wrong type.  When ReadUserDataSequence() is called
+        we check that the right type is active and change again if that is
+        not the case because something went wrong.
+    */
+    OUString GetInitialViewShellType() const;
+};
+
+} // end of namespace sd
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */