Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1375 insertions, 0 deletions

diff --git a/sd/source/ui/view/ToolBarManager.cxx b/sd/source/ui/view/ToolBarManager.cxx
new file mode 100644
index 000000000..0bb0f9528
--- /dev/null
+++ b/sd/source/ui/view/ToolBarManager.cxx
@@ -0,0 +1,1375 @@
+/* -*- 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 .
+ */
+
+#include <ToolBarManager.hxx>
+
+#include <DrawViewShell.hxx>
+#include <EventMultiplexer.hxx>
+#include <ViewShellBase.hxx>
+#include <ViewShellManager.hxx>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/frame/XLayoutManager.hpp>
+
+#include <sal/log.hxx>
+#include <osl/mutex.hxx>
+#include <o3tl/deleter.hxx>
+#include <o3tl/enumrange.hxx>
+#include <sfx2/docfile.hxx>
+#include <sfx2/objsh.hxx>
+#include <sfx2/toolbarids.hxx>
+#include <sfx2/viewfrm.hxx>
+#include <svl/eitem.hxx>
+#include <svx/svxids.hrc>
+#include <svx/extrusionbar.hxx>
+#include <svx/fontworkbar.hxx>
+#include <tools/debug.hxx>
+#include <tools/link.hxx>
+#include <vcl/svapp.hxx>
+#include <osl/diagnose.h>
+
+#include <map>
+#include <utility>
+#include <memory>
+#include <string_view>
+#include <vector>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace {
+
+using namespace sd;
+
+class ToolBarRules;
+
+/** Lock of the frame::XLayoutManager.
+*/
+class LayouterLock
+{
+    Reference<frame::XLayoutManager> mxLayouter;
+public:
+    explicit LayouterLock (const Reference<frame::XLayoutManager>& rxLayouter);
+    ~LayouterLock();
+    bool is() const { return mxLayouter.is(); }
+};
+
+/** Store a list of tool bars for each of the tool bar groups.  From
+    this the list of requested tool bars is built.
+*/
+class ToolBarList
+{
+public:
+    ToolBarList();
+
+    void ClearGroup (sd::ToolBarManager::ToolBarGroup eGroup);
+    void AddToolBar (sd::ToolBarManager::ToolBarGroup eGroup, const OUString& rsName);
+    bool RemoveToolBar (sd::ToolBarManager::ToolBarGroup eGroup, const OUString& rsName);
+
+    void GetToolBarsToActivate (std::vector<OUString>& rToolBars) const;
+    void GetToolBarsToDeactivate (std::vector<OUString>& rToolBars) const;
+
+    void MarkToolBarAsActive (const OUString& rsName);
+    void MarkToolBarAsNotActive (const OUString& rsName);
+    void MarkAllToolBarsAsNotActive();
+
+private:
+    typedef ::std::map<sd::ToolBarManager::ToolBarGroup, std::vector<OUString> > Groups;
+    Groups maGroups;
+    std::vector<OUString> maActiveToolBars;
+
+    void MakeRequestedToolBarList (std::vector<OUString>& rToolBars) const;
+};
+
+/** Manage tool bars that are implemented as sub shells of a view shell.
+    The typical procedure of updating the sub shells of a view shell is to
+    rebuild a list of sub shells that the caller would like to have active.
+    The methods ClearGroup() and AddShellId() allow the caller to do that.  A
+    final call to UpdateShells() activates the requested shells that are not
+    active and deactivates the active shells that are not requested .
+
+    This is done by maintaining two lists.  One (the current list)
+    reflects the current state.  The other (the requested list) contains the
+    currently requested shells.  UpdateShells() makes the requested
+    list the current list and clears the current list.
+
+    Each shell belongs to one group.  Different groups can be modified
+    separately.
+*/
+class ToolBarShellList
+{
+public:
+    /** Create a new object with an empty current list and an empty
+        requested list.
+    */
+    ToolBarShellList();
+
+    /** Remove all shells from a group.  Calling this method should normally
+        not be necessary because after the construction or after a call to
+        UpdateShells() the requested list is empty.
+        @param eGroup
+            The group to clear. Shells in other groups are not modified.
+    */
+    void ClearGroup (sd::ToolBarManager::ToolBarGroup eGroup);
+
+    /** Add a shell. When the specified shell has already been requested
+        for another group then it is moved to this group.
+        @param eGroup
+            The group to which to add the shell.
+        @param nId
+            The id of the shell to add.
+    */
+    void AddShellId (sd::ToolBarManager::ToolBarGroup eGroup, sd::ShellId nId);
+
+    /** Releasing all shells means that the given ToolBarRules object is
+        informed that every shell managed by the called ToolBarShellList is
+        about to be removed and that the associated framework tool bars can
+        be removed as well.  The caller still has to call UpdateShells().
+    */
+    void ReleaseAllShells (ToolBarRules& rRules);
+
+    /** The requested list is made the current list by activating  all
+        shells in the requested list and by deactivating the shells in the
+        current list that are not in the requested list.
+        @param pMainViewShell
+            The shells that are activated or deactivated are sub shells of
+            this view shell.
+        @param rManager
+            This ViewShellManager is used to activate or deactivate shells.
+    */
+    void UpdateShells (
+        const std::shared_ptr<ViewShell>& rpMainViewShell,
+        const std::shared_ptr<ViewShellManager>& rpManager);
+
+private:
+    class ShellDescriptor
+    {public:
+        ShellDescriptor (ShellId nId,sd::ToolBarManager::ToolBarGroup eGroup);
+        ShellId mnId;
+        sd::ToolBarManager::ToolBarGroup meGroup;
+        friend bool operator<(const ShellDescriptor& r1, const ShellDescriptor& r2)
+        { return r1.mnId < r2.mnId; }
+    };
+
+    /** The requested list of tool bar shells that will be active after the
+        next call to UpdateShells().
+    */
+    typedef ::std::set<ShellDescriptor> GroupedShellList;
+    GroupedShellList maNewList;
+
+    /** The list of tool bar shells that are currently on the shell stack.
+        Using a GroupedShellList is not strictly necessary but it makes
+        things easier and does not waste too much memory.
+    */
+    GroupedShellList maCurrentList;
+};
+
+/** This class concentrates the knowledge about when to show what tool bars
+    in one place.
+*/
+class ToolBarRules
+{
+public:
+    ToolBarRules (
+        const std::shared_ptr<ToolBarManager>& rpToolBarManager,
+        const std::shared_ptr<ViewShellManager>& rpViewShellManager);
+
+    /** This method calls MainViewShellChanged() and SelectionHasChanged()
+        for the current main view shell and its view.
+    */
+    void Update (ViewShellBase const & rBase);
+
+    /** Reset all tool bars in all groups and add tool bars and tool bar
+        shells to the ToolBarGroup::Permanent group for the specified ViewShell type.
+    */
+    void MainViewShellChanged (ViewShell::ShellType nShellType);
+
+    /** Reset all tool bars in all groups and add tool bars and tool bar
+        shells to the ToolBarGroup::Permanent group for the specified ViewShell.
+    */
+    void MainViewShellChanged (const ViewShell& rMainViewShell);
+
+    /** Reset all tool bars in the ToolBarGroup::Function group and add tool bars and tool bar
+        shells to this group for the current selection.
+    */
+    void SelectionHasChanged (
+        const ::sd::ViewShell& rViewShell,
+        const SdrView& rView);
+
+    /** Add a tool bar for the specified tool bar shell.
+    */
+    void SubShellAdded (
+        ::sd::ToolBarManager::ToolBarGroup eGroup,
+        sd::ShellId nShellId);
+
+    /** Remove a tool bar for the specified tool bar shell.
+    */
+    void SubShellRemoved (
+        ::sd::ToolBarManager::ToolBarGroup eGroup,
+        sd::ShellId nShellId);
+
+private:
+    std::shared_ptr<ToolBarManager> mpToolBarManager;
+    std::shared_ptr<ViewShellManager> mpViewShellManager;
+};
+
+} // end of anonymous namespace
+
+namespace sd {
+
+//===== ToolBarManager::Implementation ========================================
+
+class ToolBarManager::Implementation
+{
+public:
+    /** This constructor takes three arguments even though the
+        ToolBarManager could be taken from the ViewShellBase.  This is so to
+        state explicitly which information has to be present when this
+        constructor is called.  The ViewShellBase may not have been fully
+        initialized at this point and must not be asked for this values.
+    */
+    Implementation (
+        ViewShellBase& rBase,
+        const std::shared_ptr<sd::tools::EventMultiplexer>& rpMultiplexer,
+        const std::shared_ptr<ViewShellManager>& rpViewShellManager,
+        const std::shared_ptr<ToolBarManager>& rpToolBarManager);
+    ~Implementation();
+
+    void SetValid (bool bValid);
+
+    void ResetToolBars (ToolBarGroup eGroup);
+    void ResetAllToolBars();
+    void AddToolBar (ToolBarGroup eGroup, const OUString& rsToolBarName);
+    void AddToolBarShell (ToolBarGroup eGroup, ShellId nToolBarId);
+    void RemoveToolBar (ToolBarGroup eGroup, const OUString& rsToolBarName);
+
+    /** Release all tool bar shells and the associated framework tool bars.
+        Typically called when the main view shell is being replaced by
+        another, all tool bar shells are released.  In that process the
+        shells are destroyed anyway and without calling this method they
+        would still be referenced.
+    */
+    void ReleaseAllToolBarShells();
+
+    void ToolBarsDestroyed();
+
+    void RequestUpdate();
+
+    void PreUpdate();
+    void PostUpdate();
+    /** Tell the XLayoutManager about the tool bars that we would like to be
+        shown.
+        @param rpLayouterLock
+            This typically is the mpSynchronousLayouterLock that is used in
+            this method and that is either released at its end or assigned
+            to mpAsynchronousLock in order to be unlocked later.
+    */
+    void Update (::std::unique_ptr<LayouterLock> pLayouterLock);
+
+    class UpdateLockImplementation
+    {
+    public:
+        explicit UpdateLockImplementation (Implementation& rImplementation)
+            : mrImplementation(rImplementation) { mrImplementation.LockUpdate();  }
+        ~UpdateLockImplementation() { mrImplementation.UnlockUpdate(); }
+    private:
+        Implementation& mrImplementation;
+    };
+
+    void LockViewShellManager();
+    void LockUpdate();
+    void UnlockUpdate();
+
+    ToolBarRules& GetToolBarRules() { return maToolBarRules;}
+
+private:
+    mutable ::osl::Mutex maMutex;
+    ViewShellBase& mrBase;
+    std::shared_ptr<sd::tools::EventMultiplexer> mpEventMultiplexer;
+    bool mbIsValid;
+    ToolBarList maToolBarList;
+    ToolBarShellList maToolBarShellList;
+    Reference<frame::XLayoutManager> mxLayouter;
+    sal_Int32 mnLockCount;
+    bool mbPreUpdatePending;
+    bool mbPostUpdatePending;
+    /** The layouter locks manage the locking of the XLayoutManager.  The
+        lock() and unlock() functions are not called directly because the
+        (final) unlocking  is usually done asynchronously *after* the
+        list of requested toolbars is updated.
+    */
+    ::std::unique_ptr<LayouterLock> mpSynchronousLayouterLock;
+    ::std::unique_ptr<LayouterLock> mpAsynchronousLayouterLock;
+    ::std::unique_ptr<ViewShellManager::UpdateLock, o3tl::default_delete<ViewShellManager::UpdateLock>> mpViewShellManagerLock;
+    ImplSVEvent * mnPendingUpdateCall;
+    ImplSVEvent * mnPendingSetValidCall;
+    ToolBarRules maToolBarRules;
+
+    static OUString GetToolBarResourceName (std::u16string_view rsBaseName);
+    bool CheckPlugInMode (std::u16string_view rsName) const;
+
+    DECL_LINK(UpdateCallback, void *, void);
+    DECL_LINK(EventMultiplexerCallback, sd::tools::EventMultiplexerEvent&, void);
+    DECL_LINK(SetValidCallback, void*, void);
+};
+
+//===== ToolBarManager ========================================================
+
+std::shared_ptr<ToolBarManager> ToolBarManager::Create (
+    ViewShellBase& rBase,
+    const std::shared_ptr<sd::tools::EventMultiplexer>& rpMultiplexer,
+    const std::shared_ptr<ViewShellManager>& rpViewShellManager)
+{
+    std::shared_ptr<ToolBarManager> pManager (new ToolBarManager());
+    pManager->mpImpl.reset(
+        new Implementation(rBase,rpMultiplexer,rpViewShellManager,pManager));
+    return pManager;
+}
+
+ToolBarManager::ToolBarManager()
+{
+}
+
+ToolBarManager::~ToolBarManager()
+{
+}
+
+void ToolBarManager::Shutdown()
+{
+    if (mpImpl != nullptr)
+        mpImpl.reset();
+}
+
+void ToolBarManager::ResetToolBars (ToolBarGroup eGroup)
+{
+    if (mpImpl != nullptr)
+    {
+        UpdateLock aLock (shared_from_this());
+        mpImpl->ResetToolBars(eGroup);
+    }
+}
+
+void ToolBarManager::ResetAllToolBars()
+{
+    if (mpImpl != nullptr)
+    {
+        UpdateLock aLock (shared_from_this());
+        mpImpl->ResetAllToolBars();
+    }
+}
+
+void ToolBarManager::AddToolBar (
+    ToolBarGroup eGroup,
+    const OUString& rsToolBarName)
+{
+    if (mpImpl != nullptr)
+    {
+        UpdateLock aLock (shared_from_this());
+        mpImpl->AddToolBar(eGroup,rsToolBarName);
+    }
+}
+
+void ToolBarManager::AddToolBarShell (
+    ToolBarGroup eGroup,
+    ShellId nToolBarId)
+{
+    if (mpImpl != nullptr)
+    {
+        UpdateLock aLock (shared_from_this());
+        mpImpl->AddToolBarShell(eGroup,nToolBarId);
+    }
+}
+
+void ToolBarManager::RemoveToolBar (
+    ToolBarGroup eGroup,
+    const OUString& rsToolBarName)
+{
+    if (mpImpl != nullptr)
+    {
+        UpdateLock aLock (shared_from_this());
+        mpImpl->RemoveToolBar(eGroup,rsToolBarName);
+    }
+}
+
+void ToolBarManager::SetToolBar (
+    ToolBarGroup eGroup,
+    const OUString& rsToolBarName)
+{
+    if (mpImpl != nullptr)
+    {
+        UpdateLock aLock (shared_from_this());
+        mpImpl->ResetToolBars(eGroup);
+        mpImpl->AddToolBar(eGroup,rsToolBarName);
+    }
+}
+
+void ToolBarManager::SetToolBarShell (
+    ToolBarGroup eGroup,
+    ShellId nToolBarId)
+{
+    if (mpImpl != nullptr)
+    {
+        UpdateLock aLock (shared_from_this());
+        mpImpl->ResetToolBars(eGroup);
+        mpImpl->AddToolBarShell(eGroup,nToolBarId);
+    }
+}
+
+void ToolBarManager::PreUpdate()
+{
+    if (mpImpl != nullptr)
+        mpImpl->PreUpdate();
+}
+
+void ToolBarManager::RequestUpdate()
+{
+    if (mpImpl != nullptr)
+        mpImpl->RequestUpdate();
+}
+
+void ToolBarManager::LockViewShellManager()
+{
+    if (mpImpl != nullptr)
+        mpImpl->LockViewShellManager();
+}
+
+void ToolBarManager::LockUpdate()
+{
+    if (mpImpl != nullptr)
+        mpImpl->LockUpdate();
+}
+
+void ToolBarManager::UnlockUpdate()
+{
+    if (mpImpl != nullptr)
+        mpImpl->UnlockUpdate();
+}
+
+void ToolBarManager::MainViewShellChanged ()
+{
+    if (mpImpl != nullptr)
+    {
+        mpImpl->ReleaseAllToolBarShells();
+        mpImpl->GetToolBarRules().MainViewShellChanged(ViewShell::ST_NONE);
+    }
+}
+
+void ToolBarManager::MainViewShellChanged (const ViewShell& rMainViewShell)
+{
+    if (mpImpl != nullptr)
+    {
+        mpImpl->ReleaseAllToolBarShells();
+        mpImpl->GetToolBarRules().MainViewShellChanged(rMainViewShell);
+    }
+}
+
+void ToolBarManager::SelectionHasChanged (
+    const ViewShell& rViewShell,
+    const SdrView& rView)
+{
+    if (mpImpl != nullptr)
+        mpImpl->GetToolBarRules().SelectionHasChanged(rViewShell,rView);
+}
+
+void ToolBarManager::ToolBarsDestroyed()
+{
+    if (mpImpl != nullptr)
+        mpImpl->ToolBarsDestroyed();
+}
+
+//===== ToolBarManager::Implementation =======================================
+
+ToolBarManager::Implementation::Implementation (
+    ViewShellBase& rBase,
+    const std::shared_ptr<sd::tools::EventMultiplexer>& rpMultiplexer,
+    const std::shared_ptr<ViewShellManager>& rpViewShellManager,
+    const std::shared_ptr<ToolBarManager>& rpToolBarManager)
+    : mrBase(rBase),
+      mpEventMultiplexer(rpMultiplexer),
+      mbIsValid(false),
+      mnLockCount(0),
+      mbPreUpdatePending(false),
+      mbPostUpdatePending(false),
+      mnPendingUpdateCall(nullptr),
+      mnPendingSetValidCall(nullptr),
+      maToolBarRules(rpToolBarManager,rpViewShellManager)
+{
+    Link<tools::EventMultiplexerEvent&,void> aLink (LINK(this,ToolBarManager::Implementation,EventMultiplexerCallback));
+    mpEventMultiplexer->AddEventListener( aLink );
+}
+
+/** The order of statements is important.
+    First unregister listeners, which may post user events.
+    Then remove pending user events.
+*/
+ToolBarManager::Implementation::~Implementation()
+{
+    // Unregister at broadcasters.
+    Link<tools::EventMultiplexerEvent&,void> aLink (LINK(this,ToolBarManager::Implementation,EventMultiplexerCallback));
+    mpEventMultiplexer->RemoveEventListener(aLink);
+
+    // Abort pending user calls.
+    if (mnPendingUpdateCall != nullptr)
+        Application::RemoveUserEvent(mnPendingUpdateCall);
+    if (mnPendingSetValidCall != nullptr)
+        Application::RemoveUserEvent(mnPendingSetValidCall);
+}
+
+void ToolBarManager::Implementation::ToolBarsDestroyed()
+{
+    maToolBarList.MarkAllToolBarsAsNotActive();
+}
+
+void ToolBarManager::Implementation::SetValid (bool bValid)
+{
+    ::osl::MutexGuard aGuard(maMutex);
+
+    if (mbIsValid == bValid)
+        return;
+
+    UpdateLockImplementation aUpdateLock (*this);
+
+    mbIsValid = bValid;
+    if (mbIsValid)
+    {
+        Reference<frame::XFrame> xFrame;
+        if (mrBase.GetViewFrame() != nullptr)
+            xFrame = mrBase.GetViewFrame()->GetFrame().GetFrameInterface();
+        try
+        {
+            Reference<beans::XPropertySet> xFrameProperties (xFrame, UNO_QUERY_THROW);
+            Any aValue (xFrameProperties->getPropertyValue("LayoutManager"));
+            aValue >>= mxLayouter;
+            // tdf#119997 if mpSynchronousLayouterLock was created before mxLayouter was
+            // set then update it now that its available
+            if (mpSynchronousLayouterLock && !mpSynchronousLayouterLock->is())
+                mpSynchronousLayouterLock.reset(new LayouterLock(mxLayouter));
+        }
+        catch (const RuntimeException&)
+        {
+        }
+
+        GetToolBarRules().Update(mrBase);
+    }
+    else
+    {
+        ResetAllToolBars();
+        mxLayouter = nullptr;
+    }
+}
+
+void ToolBarManager::Implementation::ResetToolBars (ToolBarGroup eGroup)
+{
+    ::osl::MutexGuard aGuard(maMutex);
+
+    maToolBarList.ClearGroup(eGroup);
+    maToolBarShellList.ClearGroup(eGroup);
+
+    mbPreUpdatePending = true;
+}
+
+void ToolBarManager::Implementation::ResetAllToolBars()
+{
+    SAL_INFO("sd.view", __func__ << ": resetting all tool bars");
+    for (auto i : o3tl::enumrange<ToolBarGroup>())
+        ResetToolBars(i);
+}
+
+void ToolBarManager::Implementation::AddToolBar (
+    ToolBarGroup eGroup,
+    const OUString& rsToolBarName)
+{
+    ::osl::MutexGuard aGuard(maMutex);
+
+    if (CheckPlugInMode(rsToolBarName))
+    {
+        maToolBarList.AddToolBar(eGroup,rsToolBarName);
+
+        mbPostUpdatePending = true;
+        if (mnLockCount == 0)
+            PostUpdate();
+    }
+}
+
+void ToolBarManager::Implementation::RemoveToolBar (
+    ToolBarGroup eGroup,
+    const OUString& rsToolBarName)
+{
+    ::osl::MutexGuard aGuard(maMutex);
+
+    if (maToolBarList.RemoveToolBar(eGroup,rsToolBarName))
+    {
+        mbPreUpdatePending = true;
+        if (mnLockCount == 0)
+            PreUpdate();
+    }
+}
+
+void ToolBarManager::Implementation::AddToolBarShell (
+    ToolBarGroup eGroup,
+    ShellId nToolBarId)
+{
+    ViewShell* pMainViewShell = mrBase.GetMainViewShell().get();
+    if (pMainViewShell != nullptr)
+    {
+        maToolBarShellList.AddShellId(eGroup,nToolBarId);
+        GetToolBarRules().SubShellAdded(eGroup, nToolBarId);
+    }
+}
+
+void ToolBarManager::Implementation::ReleaseAllToolBarShells()
+{
+    maToolBarShellList.ReleaseAllShells(GetToolBarRules());
+    maToolBarShellList.UpdateShells(mrBase.GetMainViewShell(), mrBase.GetViewShellManager());
+}
+
+void ToolBarManager::Implementation::RequestUpdate()
+{
+    if (mnPendingUpdateCall == nullptr)
+    {
+        mnPendingUpdateCall = Application::PostUserEvent(
+            LINK(this,ToolBarManager::Implementation,UpdateCallback));
+    }
+}
+
+void ToolBarManager::Implementation::PreUpdate()
+{
+    ::osl::MutexGuard aGuard(maMutex);
+
+    if (!(mbIsValid
+        && mbPreUpdatePending
+        && mxLayouter.is()))
+        return;
+
+    mbPreUpdatePending = false;
+
+    SAL_INFO("sd.view", __func__ << ": ToolBarManager::PreUpdate [");
+
+    // Get the list of tool bars that are not used anymore and are to be
+    // deactivated.
+    std::vector<OUString> aToolBars;
+    maToolBarList.GetToolBarsToDeactivate(aToolBars);
+
+    // Turn off the tool bars.
+    for (const auto& aToolBar : aToolBars)
+    {
+        OUString sFullName (GetToolBarResourceName(aToolBar));
+        SAL_INFO("sd.view", __func__ << ":    turning off tool bar " << sFullName);
+        mxLayouter->destroyElement(sFullName);
+        maToolBarList.MarkToolBarAsNotActive(aToolBar);
+    }
+
+    SAL_INFO("sd.view", __func__ << ": ToolBarManager::PreUpdate ]");
+}
+
+void ToolBarManager::Implementation::PostUpdate()
+{
+    ::osl::MutexGuard aGuard(maMutex);
+
+    if (!(mbIsValid
+        && mbPostUpdatePending
+        && mxLayouter.is()))
+        return;
+
+    mbPostUpdatePending = false;
+
+    // Create the list of requested tool bars.
+    std::vector<OUString> aToolBars;
+    maToolBarList.GetToolBarsToActivate(aToolBars);
+
+    SAL_INFO("sd.view", __func__ << ": ToolBarManager::PostUpdate [");
+
+    // Turn on the tool bars that are visible in the new context.
+    for (const auto& aToolBar : aToolBars)
+    {
+        OUString sFullName (GetToolBarResourceName(aToolBar));
+        SAL_INFO("sd.view", __func__ << ":    turning on tool bar " << sFullName);
+        mxLayouter->requestElement(sFullName);
+        maToolBarList.MarkToolBarAsActive(aToolBar);
+    }
+
+    SAL_INFO("sd.view", __func__ << ": ToolBarManager::PostUpdate ]");
+}
+
+void ToolBarManager::Implementation::LockViewShellManager()
+{
+    if (mpViewShellManagerLock == nullptr)
+        mpViewShellManagerLock.reset(
+            new ViewShellManager::UpdateLock(mrBase.GetViewShellManager()));
+}
+
+void ToolBarManager::Implementation::LockUpdate()
+{
+    SAL_INFO("sd.view", __func__ << ": LockUpdate " << mnLockCount);
+    ::osl::MutexGuard aGuard(maMutex);
+
+    DBG_ASSERT(mnLockCount<100, "ToolBarManager lock count unusually high");
+    if (mnLockCount == 0)
+    {
+        OSL_ASSERT(mpSynchronousLayouterLock == nullptr);
+
+        mpSynchronousLayouterLock.reset(new LayouterLock(mxLayouter));
+    }
+    ++mnLockCount;
+}
+
+void ToolBarManager::Implementation::UnlockUpdate()
+{
+    SAL_INFO("sd.view", __func__ << ": UnlockUpdate " << mnLockCount);
+    ::osl::MutexGuard aGuard(maMutex);
+
+    OSL_ASSERT(mnLockCount>0);
+    --mnLockCount;
+    if (mnLockCount == 0)
+    {
+        Update(std::move(mpSynchronousLayouterLock));
+    }
+}
+
+void ToolBarManager::Implementation::Update (
+    ::std::unique_ptr<LayouterLock> pLocalLayouterLock)
+{
+    // When the lock is released and there are pending changes to the set of
+    // tool bars then update this set now.
+    if (mnLockCount != 0)
+        return;
+
+    // During creation of ViewShellBase we may have the situation that
+    // the controller has already been created and attached to the frame
+    // but that the ToolBarManager has not yet completed its
+    // initialization (by initializing the mxLayouter member.)  We do
+    // this here so that we do not have to wait for the next Update()
+    // call to show the tool bars.
+    if (mnPendingSetValidCall != nullptr)
+    {
+        Application::RemoveUserEvent(mnPendingSetValidCall);
+        mnPendingSetValidCall = nullptr;
+        SetValid(true);
+    }
+
+    if (mbIsValid && mxLayouter.is() && (mbPreUpdatePending || mbPostUpdatePending))
+    {
+        // 1) Release UNO tool bars that are no longer used.  Do this
+        // now so that they are not updated when the SFX shell stack is
+        // modified.
+        if (mbPreUpdatePending)
+            PreUpdate();
+
+        // 2) Update the requested shells that represent tool bar
+        // functionality. Those that are not used anymore are
+        // deactivated now.  Those that are missing are activated in the
+        // next step together with the view shells.
+        if (mpViewShellManagerLock == nullptr)
+            mpViewShellManagerLock.reset(
+                new ViewShellManager::UpdateLock(mrBase.GetViewShellManager()));
+        maToolBarShellList.UpdateShells(
+            mrBase.GetMainViewShell(),
+            mrBase.GetViewShellManager());
+
+        // 3) Unlock the ViewShellManager::UpdateLock.  This updates the
+        // shell stack.
+        mpViewShellManagerLock.reset();
+
+        // 4) Make the UNO tool bars visible.  The outstanding call to
+        // PostUpdate() is done via PostUserEvent() so that it is
+        // guaranteed to be executed when the SFX shell stack has been
+        // updated (under the assumption that our lock to the
+        // ViewShellManager was the only one open.  If that is not the
+        // case then all should still be well but not as fast.)
+
+        // Note that the lock count may have been increased since
+        // entering this method.  In that case one of the next
+        // UnlockUpdate() calls will post the UpdateCallback.
+        if (mnLockCount==0)
+        {
+            mpAsynchronousLayouterLock = std::move(pLocalLayouterLock);
+            if (mnPendingUpdateCall==nullptr)
+            {
+                mnPendingUpdateCall = Application::PostUserEvent(
+                    LINK(this,ToolBarManager::Implementation,UpdateCallback));
+            }
+        }
+    }
+    else
+    {
+        mpViewShellManagerLock.reset();
+        pLocalLayouterLock.reset();
+    }
+}
+
+IMPL_LINK_NOARG(ToolBarManager::Implementation, UpdateCallback, void*, void)
+{
+    mnPendingUpdateCall = nullptr;
+    if (mnLockCount == 0)
+    {
+        if (mbPreUpdatePending)
+            PreUpdate();
+        if (mbPostUpdatePending)
+            PostUpdate();
+        if (mbIsValid && mxLayouter.is())
+            mpAsynchronousLayouterLock.reset();
+    }
+}
+
+IMPL_LINK(ToolBarManager::Implementation,EventMultiplexerCallback,
+    sd::tools::EventMultiplexerEvent&, rEvent, void)
+{
+    SolarMutexGuard g;
+    switch (rEvent.meEventId)
+    {
+        case EventMultiplexerEventId::ControllerAttached:
+            if (mnPendingSetValidCall == nullptr)
+                mnPendingSetValidCall
+                    = Application::PostUserEvent(LINK(this,Implementation,SetValidCallback));
+            break;
+
+        case EventMultiplexerEventId::ControllerDetached:
+            SetValid(false);
+            break;
+
+        default: break;
+    }
+}
+
+IMPL_LINK_NOARG(ToolBarManager::Implementation, SetValidCallback, void*, void)
+{
+    mnPendingSetValidCall = nullptr;
+    SetValid(true);
+}
+
+OUString ToolBarManager::Implementation::GetToolBarResourceName (
+    std::u16string_view rsBaseName)
+{
+    return OUString::Concat("private:resource/toolbar/") + rsBaseName;
+}
+
+bool ToolBarManager::Implementation::CheckPlugInMode (std::u16string_view rsName) const
+{
+    bool bValid (false);
+
+    // Determine the plug in mode.
+    bool bIsPlugInMode (false);
+    do
+    {
+        SfxObjectShell* pObjectShell = mrBase.GetObjectShell();
+        if (pObjectShell == nullptr)
+            break;
+
+        SfxMedium* pMedium = pObjectShell->GetMedium();
+        if (pMedium == nullptr)
+            break;
+
+        const SfxBoolItem* pViewOnlyItem = SfxItemSet::GetItem<SfxBoolItem>(pMedium->GetItemSet(), SID_VIEWONLY, false);
+        if (pViewOnlyItem == nullptr)
+            break;
+
+        bIsPlugInMode = pViewOnlyItem->GetValue();
+    }
+    while (false);
+
+    if (rsName == msViewerToolBar)
+        bValid = bIsPlugInMode;
+    else
+        bValid = ! bIsPlugInMode;
+
+    return bValid;
+}
+
+} // end of namespace sd
+
+namespace {
+
+using namespace ::sd;
+
+//===== LayouterLock ==========================================================
+
+LayouterLock::LayouterLock (const Reference<frame::XLayoutManager>& rxLayouter)
+    : mxLayouter(rxLayouter)
+{
+    SAL_INFO("sd.view", __func__ << ": LayouterLock " << (mxLayouter.is() ? 1 :0));
+    if (mxLayouter.is())
+        mxLayouter->lock();
+}
+
+LayouterLock::~LayouterLock()
+{
+    SAL_INFO("sd.view", __func__ << ": ~LayouterLock " << (mxLayouter.is() ? 1 :0));
+    if (mxLayouter.is())
+        mxLayouter->unlock();
+}
+
+//===== ToolBarRules ==========================================================
+
+ToolBarRules::ToolBarRules (
+    const std::shared_ptr<sd::ToolBarManager>& rpToolBarManager,
+    const std::shared_ptr<sd::ViewShellManager>& rpViewShellManager)
+    : mpToolBarManager(rpToolBarManager),
+      mpViewShellManager(rpViewShellManager)
+{
+}
+
+void ToolBarRules::Update (ViewShellBase const & rBase)
+{
+    ViewShell* pMainViewShell = rBase.GetMainViewShell().get();
+    if (pMainViewShell != nullptr)
+    {
+        MainViewShellChanged(pMainViewShell->GetShellType());
+        if (pMainViewShell->GetView())
+            SelectionHasChanged (*pMainViewShell, *pMainViewShell->GetView());
+    }
+    else
+        MainViewShellChanged(ViewShell::ST_NONE);
+}
+
+void ToolBarRules::MainViewShellChanged (ViewShell::ShellType nShellType)
+{
+    ::sd::ToolBarManager::UpdateLock aToolBarManagerLock (mpToolBarManager);
+    ::sd::ViewShellManager::UpdateLock aViewShellManagerLock (mpViewShellManager);
+
+    mpToolBarManager->ResetAllToolBars();
+
+    switch(nShellType)
+    {
+        case ::sd::ViewShell::ST_IMPRESS:
+        case ::sd::ViewShell::ST_NOTES:
+        case ::sd::ViewShell::ST_HANDOUT:
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msToolBar);
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msOptionsToolBar);
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msViewerToolBar);
+            break;
+
+        case ::sd::ViewShell::ST_DRAW:
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msToolBar);
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msOptionsToolBar);
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msViewerToolBar);
+            break;
+
+        case ViewShell::ST_OUTLINE:
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msOutlineToolBar);
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msViewerToolBar);
+            mpToolBarManager->AddToolBarShell(
+                ToolBarManager::ToolBarGroup::Permanent, ToolbarId::Draw_Text_Toolbox_Sd);
+            break;
+
+        case ViewShell::ST_SLIDE_SORTER:
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msViewerToolBar);
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msSlideSorterToolBar);
+            mpToolBarManager->AddToolBar(
+                ToolBarManager::ToolBarGroup::Permanent,
+                ToolBarManager::msSlideSorterObjectBar);
+            break;
+
+        case ViewShell::ST_NONE:
+        case ViewShell::ST_PRESENTATION:
+        case ViewShell::ST_SIDEBAR:
+        default:
+            break;
+    }
+}
+
+void ToolBarRules::MainViewShellChanged (const ViewShell& rMainViewShell)
+{
+    ::sd::ToolBarManager::UpdateLock aToolBarManagerLock (mpToolBarManager);
+    ::sd::ViewShellManager::UpdateLock aViewShellManagerLock (mpViewShellManager);
+
+    MainViewShellChanged(rMainViewShell.GetShellType());
+    switch(rMainViewShell.GetShellType())
+    {
+        case ::sd::ViewShell::ST_IMPRESS:
+        case ::sd::ViewShell::ST_DRAW:
+        case ::sd::ViewShell::ST_NOTES:
+        {
+            const DrawViewShell* pDrawViewShell
+                = dynamic_cast<const DrawViewShell*>(&rMainViewShell);
+            if (pDrawViewShell != nullptr)
+            {
+                if (pDrawViewShell->GetEditMode() == EditMode::MasterPage)
+                    mpToolBarManager->AddToolBar(
+                        ToolBarManager::ToolBarGroup::MasterMode,
+                        ToolBarManager::msMasterViewToolBar);
+                else if ( rMainViewShell.GetShellType() != ::sd::ViewShell::ST_DRAW )
+                    mpToolBarManager->AddToolBar(
+                        ToolBarManager::ToolBarGroup::CommonTask,
+                        ToolBarManager::msCommonTaskToolBar);
+            }
+            break;
+        }
+
+        default:
+            break;
+    }
+}
+
+void ToolBarRules::SelectionHasChanged (
+    const ::sd::ViewShell& rViewShell,
+    const SdrView& rView)
+{
+    ::sd::ToolBarManager::UpdateLock aLock (mpToolBarManager);
+    mpToolBarManager->LockViewShellManager();
+    bool bTextEdit = rView.IsTextEdit();
+
+    mpToolBarManager->ResetToolBars(ToolBarManager::ToolBarGroup::Function);
+
+    switch (rView.GetContext())
+    {
+        case SdrViewContext::Graphic:
+            if( !bTextEdit )
+                mpToolBarManager->SetToolBarShell(ToolBarManager::ToolBarGroup::Function, ToolbarId::Draw_Graf_Toolbox);
+            break;
+
+        case SdrViewContext::Media:
+            if( !bTextEdit )
+                mpToolBarManager->SetToolBarShell(ToolBarManager::ToolBarGroup::Function, ToolbarId::Draw_Media_Toolbox);
+            break;
+
+        case SdrViewContext::Table:
+            mpToolBarManager->SetToolBarShell(ToolBarManager::ToolBarGroup::Function, ToolbarId::Draw_Table_Toolbox);
+            bTextEdit = true;
+            break;
+
+        case SdrViewContext::Standard:
+        default:
+            if( !bTextEdit )
+            {
+                switch(rViewShell.GetShellType())
+                {
+                    case ::sd::ViewShell::ST_IMPRESS:
+                    case ::sd::ViewShell::ST_DRAW:
+                    case ::sd::ViewShell::ST_NOTES:
+                    case ::sd::ViewShell::ST_HANDOUT:
+                        mpToolBarManager->SetToolBar(
+                            ToolBarManager::ToolBarGroup::Function,
+                            ToolBarManager::msDrawingObjectToolBar);
+                        break;
+                    default:
+                        break;
+                }
+                break;
+            }
+    }
+
+    if( bTextEdit )
+        mpToolBarManager->AddToolBarShell(ToolBarManager::ToolBarGroup::Function, ToolbarId::Draw_Text_Toolbox_Sd);
+
+    SdrView* pView = &const_cast<SdrView&>(rView);
+    // Check if the extrusion tool bar and the fontwork tool bar have to
+    // be activated.
+    if (svx::checkForSelectedCustomShapes(pView, true /* bOnlyExtruded */ ))
+        mpToolBarManager->AddToolBarShell(ToolBarManager::ToolBarGroup::Function, ToolbarId::Svx_Extrusion_Bar);
+
+    if (svx::checkForSelectedFontWork(pView))
+        mpToolBarManager->AddToolBarShell(ToolBarManager::ToolBarGroup::Function, ToolbarId::Svx_Fontwork_Bar);
+
+    // Switch on additional context-sensitive tool bars.
+    if (rView.GetContext() == SdrViewContext::PointEdit)
+        mpToolBarManager->AddToolBarShell(ToolBarManager::ToolBarGroup::Function, ToolbarId::Bezier_Toolbox_Sd);
+}
+
+void ToolBarRules::SubShellAdded (
+    ::sd::ToolBarManager::ToolBarGroup eGroup,
+    sd::ShellId nShellId)
+{
+    // For some tool bar shells (those defined in sd) we have to add the
+    // actual tool bar here.
+    switch (nShellId)
+    {
+        case ToolbarId::Draw_Graf_Toolbox:
+            mpToolBarManager->AddToolBar(eGroup, ToolBarManager::msGraphicObjectBar);
+            break;
+
+        case ToolbarId::Draw_Media_Toolbox:
+            mpToolBarManager->AddToolBar(eGroup, ToolBarManager::msMediaObjectBar);
+            break;
+
+        case ToolbarId::Draw_Text_Toolbox_Sd:
+            mpToolBarManager->AddToolBar(eGroup, ToolBarManager::msTextObjectBar);
+            break;
+
+        case ToolbarId::Bezier_Toolbox_Sd:
+            mpToolBarManager->AddToolBar(eGroup, ToolBarManager::msBezierObjectBar);
+            break;
+
+        case ToolbarId::Draw_Table_Toolbox:
+            mpToolBarManager->AddToolBar(eGroup, ToolBarManager::msTableObjectBar);
+            break;
+
+        default:
+            break;
+    }
+}
+
+void ToolBarRules::SubShellRemoved (
+    ::sd::ToolBarManager::ToolBarGroup eGroup,
+    sd::ShellId nShellId)
+{
+    // For some tool bar shells (those defined in sd) we have to add the
+    // actual tool bar here.
+    switch (nShellId)
+    {
+        case ToolbarId::Draw_Graf_Toolbox:
+            mpToolBarManager->RemoveToolBar(eGroup, ToolBarManager::msGraphicObjectBar);
+            break;
+
+        case ToolbarId::Draw_Media_Toolbox:
+            mpToolBarManager->RemoveToolBar(eGroup, ToolBarManager::msMediaObjectBar);
+            break;
+
+        case ToolbarId::Draw_Text_Toolbox_Sd:
+            mpToolBarManager->RemoveToolBar(eGroup, ToolBarManager::msTextObjectBar);
+            break;
+
+        case ToolbarId::Bezier_Toolbox_Sd:
+            mpToolBarManager->RemoveToolBar(eGroup, ToolBarManager::msBezierObjectBar);
+            break;
+
+        case ToolbarId::Draw_Table_Toolbox:
+            mpToolBarManager->RemoveToolBar(eGroup, ToolBarManager::msTableObjectBar);
+            break;
+
+        default:
+            break;
+    }
+}
+
+//===== ToolBarList ===========================================================
+
+ToolBarList::ToolBarList()
+{
+}
+
+void ToolBarList::ClearGroup (sd::ToolBarManager::ToolBarGroup eGroup)
+{
+    Groups::iterator iGroup (maGroups.find(eGroup));
+    if (iGroup != maGroups.end())
+    {
+        iGroup->second.clear();
+    }
+}
+
+void ToolBarList::AddToolBar (
+    sd::ToolBarManager::ToolBarGroup eGroup,
+    const OUString& rsName)
+{
+    Groups::iterator iGroup (maGroups.find(eGroup));
+    if (iGroup == maGroups.end())
+        iGroup = maGroups.emplace(eGroup,std::vector<OUString>()).first;
+
+    if (iGroup != maGroups.end())
+    {
+        auto iBar (std::find(iGroup->second.cbegin(),iGroup->second.cend(),rsName));
+        if (iBar == iGroup->second.cend())
+        {
+            iGroup->second.push_back(rsName);
+        }
+    }
+}
+
+bool ToolBarList::RemoveToolBar (
+    sd::ToolBarManager::ToolBarGroup eGroup,
+    const OUString& rsName)
+{
+    Groups::iterator iGroup (maGroups.find(eGroup));
+    if (iGroup != maGroups.end())
+    {
+        auto iBar (std::find(iGroup->second.begin(),iGroup->second.end(),rsName));
+        if (iBar != iGroup->second.end())
+        {
+            iGroup->second.erase(iBar);
+            return true;
+        }
+    }
+    return false;
+}
+
+void ToolBarList::MakeRequestedToolBarList (std::vector<OUString>& rRequestedToolBars) const
+{
+    for (auto eGroup : o3tl::enumrange<sd::ToolBarManager::ToolBarGroup>())
+    {
+        Groups::const_iterator iGroup (maGroups.find(eGroup));
+        if (iGroup != maGroups.end())
+            rRequestedToolBars.insert( rRequestedToolBars.end(),
+                iGroup->second.begin(),
+                iGroup->second.end() );
+    }
+}
+
+void ToolBarList::GetToolBarsToActivate (std::vector<OUString>& rToolBars) const
+{
+    std::vector<OUString> aRequestedToolBars;
+    MakeRequestedToolBarList(aRequestedToolBars);
+
+    for (const auto& aToolBar : aRequestedToolBars)
+    {
+        if (::std::find(maActiveToolBars.begin(),maActiveToolBars.end(),aToolBar)
+            == maActiveToolBars.end())
+        {
+            rToolBars.push_back(aToolBar);
+        }
+    }
+}
+
+void ToolBarList::GetToolBarsToDeactivate (std::vector<OUString>& rToolBars) const
+{
+    std::vector<OUString> aRequestedToolBars;
+    MakeRequestedToolBarList(aRequestedToolBars);
+
+    for (auto& aToolBar : maActiveToolBars)
+    {
+        if (::std::find(aRequestedToolBars.begin(),aRequestedToolBars.end(),aToolBar)
+            == aRequestedToolBars.end())
+        {
+            rToolBars.push_back(aToolBar);
+        }
+    }
+}
+
+void ToolBarList::MarkToolBarAsActive (const OUString& rsName)
+{
+    maActiveToolBars.push_back(rsName);
+}
+
+void ToolBarList::MarkToolBarAsNotActive (const OUString& rsName)
+{
+    maActiveToolBars.erase(
+        ::std::find(maActiveToolBars.begin(),maActiveToolBars.end(), rsName));
+}
+
+void ToolBarList::MarkAllToolBarsAsNotActive()
+{
+    maActiveToolBars.clear();
+}
+
+//===== ToolBarShellList ======================================================
+
+ToolBarShellList::ShellDescriptor::ShellDescriptor (
+    ShellId nId,
+    sd::ToolBarManager::ToolBarGroup eGroup)
+    : mnId(nId),
+      meGroup(eGroup)
+{
+}
+
+ToolBarShellList::ToolBarShellList()
+{
+}
+
+void ToolBarShellList::ClearGroup (sd::ToolBarManager::ToolBarGroup eGroup)
+{
+    for (GroupedShellList::iterator iDescriptor = maNewList.begin(); iDescriptor != maNewList.end(); )
+        if (iDescriptor->meGroup == eGroup)
+            iDescriptor = maNewList.erase(iDescriptor);
+        else
+            ++iDescriptor;
+}
+
+void ToolBarShellList::AddShellId (sd::ToolBarManager::ToolBarGroup eGroup, sd::ShellId nId)
+{
+    // Make sure that the shell is not added twice (and possibly in
+    // different groups.)
+    ShellDescriptor aDescriptor (nId,eGroup);
+    GroupedShellList::iterator iDescriptor (maNewList.find(aDescriptor));
+    if (iDescriptor != maNewList.end())
+    {
+        // The shell is already requested.
+        if (iDescriptor->meGroup != eGroup)
+        {
+            // It is now being requested for another group.
+            // (Is this an error?)
+            // Move it to that group.
+            maNewList.erase(iDescriptor);
+            maNewList.insert(aDescriptor);
+        }
+        // else nothing to do.
+    }
+    else
+        maNewList.insert(aDescriptor);
+}
+
+void ToolBarShellList::ReleaseAllShells (ToolBarRules& rRules)
+{
+    // Release the currently active tool bars.
+    GroupedShellList aList (maCurrentList);
+    for (const auto& rDescriptor : aList)
+    {
+        rRules.SubShellRemoved(rDescriptor.meGroup, rDescriptor.mnId);
+    }
+
+    // Clear the list of requested tool bars.
+    maNewList.clear();
+}
+
+void ToolBarShellList::UpdateShells (
+    const std::shared_ptr<ViewShell>& rpMainViewShell,
+    const std::shared_ptr<ViewShellManager>& rpManager)
+{
+    if (rpMainViewShell == nullptr)
+        return;
+
+    GroupedShellList aList;
+
+    // Deactivate shells that are in maCurrentList, but not in
+    // maNewList.
+    ::std::set_difference(maCurrentList.begin(), maCurrentList.end(),
+        maNewList.begin(), maNewList.end(),
+        std::insert_iterator<GroupedShellList>(aList,aList.begin()));
+    for (const auto& rShell : aList)
+    {
+        SAL_INFO("sd.view", __func__ << ": deactivating tool bar shell " << static_cast<sal_uInt32>(rShell.mnId));
+        rpManager->DeactivateSubShell(*rpMainViewShell, rShell.mnId);
+    }
+
+    // Activate shells that are in maNewList, but not in
+    // maCurrentList.
+    aList.clear();
+    ::std::set_difference(maNewList.begin(), maNewList.end(),
+        maCurrentList.begin(), maCurrentList.end(),
+        std::insert_iterator<GroupedShellList>(aList,aList.begin()));
+    for (const auto& rShell : aList)
+    {
+        SAL_INFO("sd.view", __func__ << ": activating tool bar shell " << static_cast<sal_uInt32>(rShell.mnId));
+        rpManager->ActivateSubShell(*rpMainViewShell, rShell.mnId);
+    }
+
+    // The maNewList now reflects the current state and thus is made
+    // maCurrentList.
+    maCurrentList = maNewList;
+}
+
+} // end of anonymous namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */