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

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

131 files changed, 17670 insertions, 0 deletions

diff --git a/include/comphelper/AccessibleImplementationHelper.hxx b/include/comphelper/AccessibleImplementationHelper.hxx
new file mode 100644
index 000000000..b6c8d9ab0
--- /dev/null
+++ b/include/comphelper/AccessibleImplementationHelper.hxx
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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 .
+ */
+
+#pragma once
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star::awt
+{
+struct KeyStroke;
+}
+namespace com::sun::star::uno
+{
+template <class E> class Sequence;
+}
+
+namespace comphelper
+{
+/**
+ * Helper function used for converting keybinding to string.
+ *
+ * @param    keySet    the key stroke sequence.
+ */
+COMPHELPER_DLLPUBLIC OUString
+GetkeyBindingStrByXkeyBinding(const css::uno::Sequence<css::awt::KeyStroke>& keySet);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/include/comphelper/ChainablePropertySet.hxx b/include/comphelper/ChainablePropertySet.hxx
new file mode 100644
index 000000000..fb4fbd744
--- /dev/null
+++ b/include/comphelper/ChainablePropertySet.hxx
@@ -0,0 +1,148 @@
+/* -*- 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_COMPHELPER_CHAINABLEPROPERTYSET_HXX
+#define INCLUDED_COMPHELPER_CHAINABLEPROPERTYSET_HXX
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertyState.hpp>
+#include <com/sun/star/beans/XMultiPropertySet.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <cppuhelper/implbase.hxx>
+#include <rtl/ref.hxx>
+
+namespace comphelper { class SolarMutex; }
+namespace comphelper { struct PropertyInfo; }
+
+namespace comphelper
+{
+    class ChainablePropertySetInfo;
+}
+
+/*
+ * A ChainablePropertySet has the following features:
+ *
+ * 1. It implements both the PropertySet and MultiPropertySet interfaces.
+ * 2. It can be 'included' in a MasterPropertySet to seamlessly appear as if
+ *    if it's properties were in the master.
+ *
+ * To be used as a base class for PropertySets, the subclass must implement
+ * the 6 protected pure virtual functions. If a mutex is passed to the
+ * constructor, this is locked before any call to _getSingleValue or
+ * _setSingleValue and released after all processing has completed
+ * (including _postSetValues or _postGetValues )
+ *
+ * Any MasterPropertySet implementations that can include an
+ * implementation of a given ChainablePropertySet must be
+ * declared as a 'friend' in the implementation of the ChainablePropertySet.
+ *
+ */
+
+namespace comphelper
+{
+    typedef cppu::WeakImplHelper
+    <
+        css::beans::XPropertySet,
+        css::beans::XMultiPropertySet,
+        css::lang::XServiceInfo
+    >
+    ChainablePropertySetBase;
+    class COMPHELPER_DLLPUBLIC ChainablePropertySet : public ChainablePropertySetBase,
+                                 public css::beans::XPropertyState
+    {
+        friend class MasterPropertySet;
+    protected:
+        SolarMutex* const mpMutex;
+        rtl::Reference < ChainablePropertySetInfo > mxInfo;
+
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        /// @throws css::uno::RuntimeException
+        virtual void _preSetValues () = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        /// @throws css::uno::RuntimeException
+        virtual void _setSingleValue(const comphelper::PropertyInfo & rInfo, const css::uno::Any &rValue) = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        /// @throws css::uno::RuntimeException
+        virtual void _postSetValues () = 0;
+
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        /// @throws css::uno::RuntimeException
+        virtual void _preGetValues () = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::lang::WrappedTargetException
+        /// @throws css::uno::RuntimeException
+        virtual void _getSingleValue( const comphelper::PropertyInfo & rInfo, css::uno::Any & rValue ) = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        virtual void _postGetValues () = 0;
+
+    public:
+        ChainablePropertySet( comphelper::ChainablePropertySetInfo* pInfo, SolarMutex* pMutex )
+            noexcept;
+        virtual ~ChainablePropertySet()
+            noexcept override;
+
+        css::uno::Any SAL_CALL queryInterface( const css::uno::Type& aType ) override
+        { return ChainablePropertySetBase::queryInterface( aType ); }
+        void SAL_CALL acquire(  ) noexcept override
+        { ChainablePropertySetBase::acquire( ); }
+        void SAL_CALL release(  ) noexcept override
+        { ChainablePropertySetBase::release( ); }
+
+        // XPropertySet
+        virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL getPropertySetInfo(  ) override;
+        virtual void SAL_CALL setPropertyValue( const OUString& aPropertyName, const css::uno::Any& aValue ) override;
+        virtual css::uno::Any SAL_CALL getPropertyValue( const OUString& PropertyName ) override;
+        virtual void SAL_CALL addPropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener ) override;
+        virtual void SAL_CALL removePropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& aListener ) override;
+        virtual void SAL_CALL addVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+        virtual void SAL_CALL removeVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+
+        // XMultiPropertySet
+        virtual void SAL_CALL setPropertyValues( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Sequence< css::uno::Any >& aValues ) override;
+        virtual css::uno::Sequence< css::uno::Any > SAL_CALL getPropertyValues( const css::uno::Sequence< OUString >& aPropertyNames ) override;
+        virtual void SAL_CALL addPropertiesChangeListener( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+        virtual void SAL_CALL removePropertiesChangeListener( const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+        virtual void SAL_CALL firePropertiesChangeEvent( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+
+        // XPropertyState
+        virtual css::beans::PropertyState SAL_CALL getPropertyState( const OUString& PropertyName ) override;
+        virtual css::uno::Sequence< css::beans::PropertyState > SAL_CALL getPropertyStates( const css::uno::Sequence< OUString >& aPropertyName ) override;
+        virtual void SAL_CALL setPropertyToDefault( const OUString& PropertyName ) override;
+        virtual css::uno::Any SAL_CALL getPropertyDefault( const OUString& aPropertyName ) override;
+    };
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/ChainablePropertySetInfo.hxx b/include/comphelper/ChainablePropertySetInfo.hxx
new file mode 100644
index 000000000..5ece0701c
--- /dev/null
+++ b/include/comphelper/ChainablePropertySetInfo.hxx
@@ -0,0 +1,64 @@
+/* -*- 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_COMPHELPER_CHAINABLEPROPERTYSETINFO_HXX
+#define INCLUDED_COMPHELPER_CHAINABLEPROPERTYSETINFO_HXX
+
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <comphelper/PropertyInfoHash.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+/*
+ * A ChainablePropertySetInfo is usually initialised with a pointer to the first element
+ * of a null-terminated static table of PropertyInfo structs. This is placed in a hash_map
+ * for fast access
+ *
+ */
+namespace comphelper
+{
+    // workaround for incremental linking bugs in MSVC2015
+    class SAL_DLLPUBLIC_TEMPLATE ChainablePropertySetInfo_Base : public cppu::WeakImplHelper< css::beans::XPropertySetInfo > {};
+
+    class COMPHELPER_DLLPUBLIC ChainablePropertySetInfo final : public ChainablePropertySetInfo_Base
+    {
+    public:
+        ChainablePropertySetInfo( PropertyInfo const * pMap );
+
+        void remove( const OUString& aName );
+
+    private:
+        virtual ~ChainablePropertySetInfo()
+            noexcept override;
+
+        // XPropertySetInfo
+        virtual css::uno::Sequence< css::beans::Property > SAL_CALL getProperties() override;
+        virtual css::beans::Property SAL_CALL getPropertyByName( const OUString& aName ) override;
+        virtual sal_Bool SAL_CALL hasPropertyByName( const OUString& Name ) override;
+
+        PropertyInfoHash                            maMap;
+        css::uno::Sequence < css::beans::Property > maProperties;
+
+        friend class ChainablePropertySet;
+        friend class MasterPropertySet;
+    };
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/DirectoryHelper.hxx b/include/comphelper/DirectoryHelper.hxx
new file mode 100644
index 000000000..321e9f960
--- /dev/null
+++ b/include/comphelper/DirectoryHelper.hxx
@@ -0,0 +1,38 @@
+/* -*- 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/.
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+#include <set>
+#include <string_view>
+
+namespace comphelper
+{
+class COMPHELPER_DLLPUBLIC DirectoryHelper
+{
+public:
+    static std::u16string_view splitAtLastToken(std::u16string_view rSrc, sal_Unicode aToken,
+                                                OUString& rRight);
+    static bool fileExists(const OUString& rBaseURL);
+    static bool dirExists(const OUString& rDirURL);
+
+    // all rDirs and rFiles strings are already URI encoded, so safe for concat
+    static void scanDirsAndFiles(const OUString& rDirURL, std::set<OUString>& rDirs,
+                                 std::set<std::pair<OUString, OUString>>& rFiles);
+    static bool deleteDirRecursively(const OUString& rDirURL);
+    static bool moveDirContent(const OUString& rSourceDirURL, std::u16string_view rTargetDirURL,
+                               const std::set<OUString>& rExcludeList);
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/IdPropArrayHelper.hxx b/include/comphelper/IdPropArrayHelper.hxx
new file mode 100644
index 000000000..8b70db849
--- /dev/null
+++ b/include/comphelper/IdPropArrayHelper.hxx
@@ -0,0 +1,106 @@
+/* -*- 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 .
+ */
+#pragma once
+
+#include <sal/config.h>
+
+#include <mutex>
+#include <cppuhelper/propshlp.hxx>
+#include <cassert>
+#include <unordered_map>
+
+namespace comphelper
+{
+
+    typedef std::unordered_map< sal_Int32, ::cppu::IPropertyArrayHelper* > OIdPropertyArrayMap;
+    template <class TYPE>
+    class OIdPropertyArrayUsageHelper
+    {
+    public:
+        OIdPropertyArrayUsageHelper();
+        virtual ~OIdPropertyArrayUsageHelper()
+        {
+            std::unique_lock aGuard(theMutex());
+            assert(s_nRefCount > 0 && "OIdPropertyArrayUsageHelper::~OIdPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !");
+            if (!--s_nRefCount)
+            {
+                // delete the element
+                for (auto const& elem : *s_pMap)
+                    delete elem.second;
+                delete s_pMap;
+                s_pMap = nullptr;
+            }
+        }
+
+        /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
+            class, which is created if necessary.
+        */
+        ::cppu::IPropertyArrayHelper* getArrayHelper(sal_Int32 nId);
+
+    protected:
+        /** used to implement the creation of the array helper which is shared amongst all instances of the class.
+            This method needs to be implemented in derived classes.
+            <BR>
+            The method gets called with Mutex acquired.
+            @return                         a pointer to the newly created array helper. Must not be NULL.
+        */
+        virtual ::cppu::IPropertyArrayHelper* createArrayHelper(sal_Int32 nId) const = 0;
+    private:
+        static sal_Int32                        s_nRefCount;
+        static OIdPropertyArrayMap*             s_pMap;
+        static std::mutex& theMutex()
+        {
+            static std::mutex SINGLETON;
+            return SINGLETON;
+        }
+    };
+
+    template<class TYPE>
+    sal_Int32                       OIdPropertyArrayUsageHelper< TYPE >::s_nRefCount    = 0;
+
+    template<class TYPE>
+    OIdPropertyArrayMap*            OIdPropertyArrayUsageHelper< TYPE >::s_pMap = nullptr;
+
+    template <class TYPE>
+    OIdPropertyArrayUsageHelper<TYPE>::OIdPropertyArrayUsageHelper()
+    {
+        std::unique_lock aGuard(theMutex());
+        // create the map if necessary
+        if (!s_pMap)
+            s_pMap = new OIdPropertyArrayMap;
+        ++s_nRefCount;
+    }
+
+    template <class TYPE>
+    ::cppu::IPropertyArrayHelper* OIdPropertyArrayUsageHelper<TYPE>::getArrayHelper(sal_Int32 nId)
+    {
+        assert(s_nRefCount && "OIdPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
+        std::unique_lock aGuard(theMutex());
+        // do we have the array already?
+        auto& rEntry = (*s_pMap)[nId];
+        if (!rEntry)
+        {
+            rEntry = createArrayHelper(nId);
+            assert(rEntry && "OIdPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
+        }
+        return (*s_pMap)[nId];
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/MasterPropertySet.hxx b/include/comphelper/MasterPropertySet.hxx
new file mode 100644
index 000000000..acd9ce9c4
--- /dev/null
+++ b/include/comphelper/MasterPropertySet.hxx
@@ -0,0 +1,135 @@
+/* -*- 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_COMPHELPER_MASTERPROPERTYSET_HXX
+#define INCLUDED_COMPHELPER_MASTERPROPERTYSET_HXX
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertyState.hpp>
+#include <com/sun/star/beans/XMultiPropertySet.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/ChainablePropertySet.hxx>
+#include <rtl/ref.hxx>
+#include <map>
+
+namespace comphelper { class SolarMutex; }
+namespace comphelper { struct PropertyInfo; }
+
+namespace comphelper
+{
+    class MasterPropertySetInfo;
+    class ChainablePropertySet;
+    struct SlaveData
+    {
+        rtl::Reference < ChainablePropertySet > mxSlave;
+        bool                                    mbInit;
+
+        SlaveData ( ChainablePropertySet *pSlave);
+        bool IsInit () const { return mbInit;}
+        void SetInit ( bool bInit) { mbInit = bInit; }
+    };
+}
+
+/*
+ * A MasterPropertySet implements all of the features of a ChainablePropertySet
+ * (it is not inherited from ChainablePropertySet to prevent MasterPropertySets
+ * being chained to each other), but also allows properties implemented in
+ * other ChainablePropertySets to be included as 'native' properties in a
+ * given MasterPropertySet implementation. These are registered using the
+ * 'registerSlave' method, and require that the implementation of the
+ * ChainablePropertySet and the implementation of the ChainablePropertySetInfo
+ * both declare the implementation of the MasterPropertySet as a friend.
+ */
+namespace comphelper
+{
+    class COMPHELPER_DLLPUBLIC MasterPropertySet : public css::beans::XPropertySet,
+                              public css::beans::XPropertyState,
+                              public css::beans::XMultiPropertySet
+    {
+    protected:
+        SolarMutex* const mpMutex;
+        sal_uInt8 mnLastId;
+        std::map< sal_uInt8, comphelper::SlaveData* >  maSlaveMap;
+        rtl::Reference< MasterPropertySetInfo >        mxInfo;
+
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        virtual void _preSetValues () = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        /// @throws css::uno::RuntimeException
+        virtual void _setSingleValue( const comphelper::PropertyInfo & rInfo, const css::uno::Any &rValue ) = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        virtual void _postSetValues () = 0;
+
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        virtual void _preGetValues () = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::lang::WrappedTargetException
+        /// @throws css::uno::RuntimeException
+        virtual void _getSingleValue( const comphelper::PropertyInfo & rInfo, css::uno::Any & rValue ) = 0;
+        /// @throws css::beans::UnknownPropertyException
+        /// @throws css::beans::PropertyVetoException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::lang::WrappedTargetException
+        virtual void _postGetValues () = 0;
+
+    public:
+        MasterPropertySet( comphelper::MasterPropertySetInfo* pInfo, SolarMutex* pMutex )
+            noexcept;
+        virtual ~MasterPropertySet()
+            noexcept;
+        void registerSlave ( ChainablePropertySet *pNewSet )
+            noexcept;
+
+        // XPropertySet
+        virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL getPropertySetInfo(  ) override;
+        virtual void SAL_CALL setPropertyValue( const OUString& aPropertyName, const css::uno::Any& aValue ) override;
+        virtual css::uno::Any SAL_CALL getPropertyValue( const OUString& PropertyName ) override;
+        virtual void SAL_CALL addPropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener ) override;
+        virtual void SAL_CALL removePropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& aListener ) override;
+        virtual void SAL_CALL addVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+        virtual void SAL_CALL removeVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+
+        // XMultiPropertySet
+        virtual void SAL_CALL setPropertyValues( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Sequence< css::uno::Any >& aValues ) override;
+        virtual css::uno::Sequence< css::uno::Any > SAL_CALL getPropertyValues( const css::uno::Sequence< OUString >& aPropertyNames ) override;
+        virtual void SAL_CALL addPropertiesChangeListener( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+        virtual void SAL_CALL removePropertiesChangeListener( const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+        virtual void SAL_CALL firePropertiesChangeEvent( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+
+        // XPropertyState
+        virtual css::beans::PropertyState SAL_CALL getPropertyState( const OUString& PropertyName ) override;
+        virtual css::uno::Sequence< css::beans::PropertyState > SAL_CALL getPropertyStates( const css::uno::Sequence< OUString >& aPropertyName ) override;
+        virtual void SAL_CALL setPropertyToDefault( const OUString& PropertyName ) override;
+        virtual css::uno::Any SAL_CALL getPropertyDefault( const OUString& aPropertyName ) override;
+    };
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/MasterPropertySetInfo.hxx b/include/comphelper/MasterPropertySetInfo.hxx
new file mode 100644
index 000000000..0e50cc457
--- /dev/null
+++ b/include/comphelper/MasterPropertySetInfo.hxx
@@ -0,0 +1,56 @@
+/* -*- 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_COMPHELPER_MASTERPROPERTYSETINFO_HXX
+#define INCLUDED_COMPHELPER_MASTERPROPERTYSETINFO_HXX
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <comphelper/PropertyInfoHash.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper
+{
+    // workaround for incremental linking bugs in MSVC2015
+    class SAL_DLLPUBLIC_TEMPLATE MasterPropertySetInfo_Base : public cppu::WeakImplHelper< css::beans::XPropertySetInfo > {};
+
+    class COMPHELPER_DLLPUBLIC MasterPropertySetInfo final : public MasterPropertySetInfo_Base
+    {
+    public:
+        MasterPropertySetInfo( PropertyInfo const * pMap );
+
+    private:
+        virtual ~MasterPropertySetInfo()
+            noexcept override;
+
+        void add( PropertyInfoHash &rHash, sal_uInt8 nMapId );
+
+        // XPropertySetInfo
+        virtual css::uno::Sequence< css::beans::Property > SAL_CALL getProperties() override;
+        virtual css::beans::Property SAL_CALL getPropertyByName( const OUString& aName ) override;
+        virtual sal_Bool SAL_CALL hasPropertyByName( const OUString& Name ) override;
+
+        PropertyDataHash                            maMap;
+        css::uno::Sequence < css::beans::Property > maProperties;
+
+        friend class MasterPropertySet;
+    };
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/PropertyInfoHash.hxx b/include/comphelper/PropertyInfoHash.hxx
new file mode 100644
index 000000000..8c584ce5a
--- /dev/null
+++ b/include/comphelper/PropertyInfoHash.hxx
@@ -0,0 +1,57 @@
+/* -*- 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_COMPHELPER_PROPERTYINFOHASH_HXX
+#define INCLUDED_COMPHELPER_PROPERTYINFOHASH_HXX
+
+#include <rtl/ustring.hxx>
+#include <com/sun/star/uno/Type.h>
+#include <unordered_map>
+
+namespace comphelper
+{
+    struct PropertyInfo
+    {
+        OUString maName;
+        css::uno::Type maType;
+        sal_Int32 mnHandle;
+        sal_Int16 mnAttributes;
+
+        PropertyInfo(OUString const & aName, sal_Int32 nHandle, css::uno::Type const & aType, sal_Int16 nAttributes)
+            : maName(aName), maType(aType), mnHandle(nHandle), mnAttributes(nAttributes) {}
+        PropertyInfo(OUString && aName, sal_Int32 nHandle, css::uno::Type const & aType, sal_Int16 nAttributes)
+            : maName(std::move(aName)), maType(aType), mnHandle(nHandle), mnAttributes(nAttributes) {}
+    };
+    struct PropertyData
+    {
+        sal_uInt8 mnMapId;
+        const PropertyInfo *mpInfo;
+        PropertyData ( sal_uInt8 nMapId, PropertyInfo const *pInfo )
+        : mnMapId ( nMapId )
+        , mpInfo ( pInfo ) {}
+    };
+}
+
+typedef std::unordered_map < OUString,
+                        ::comphelper::PropertyInfo const * > PropertyInfoHash;
+typedef std::unordered_map < OUString,
+                        ::comphelper::PropertyData* > PropertyDataHash;
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/SelectionMultiplex.hxx b/include/comphelper/SelectionMultiplex.hxx
new file mode 100644
index 000000000..ab980984a
--- /dev/null
+++ b/include/comphelper/SelectionMultiplex.hxx
@@ -0,0 +1,93 @@
+/* -*- 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_COMPHELPER_SELECTIONMULTIPLEX_HXX
+#define INCLUDED_COMPHELPER_SELECTIONMULTIPLEX_HXX
+
+#include <com/sun/star/view/XSelectionChangeListener.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::view { class XSelectionSupplier; }
+
+//= selection helper classes
+
+
+namespace comphelper
+{
+
+
+    //= OSelectionChangeListener
+
+    /// simple listener adapter for selections
+    class COMPHELPER_DLLPUBLIC OSelectionChangeListener
+    {
+        friend class OSelectionChangeMultiplexer;
+
+    public:
+        virtual ~OSelectionChangeListener();
+
+        /// @throws css::uno::RuntimeException
+        virtual void _selectionChanged( const css::lang::EventObject& aEvent ) = 0;
+        /// @throws css::uno::RuntimeException
+        virtual void _disposing(const css::lang::EventObject& _rSource);
+    };
+
+
+    //= OSelectionChangeMultiplexer
+
+    /// multiplexer for selection changes
+    class COMPHELPER_DLLPUBLIC OSelectionChangeMultiplexer final : public cppu::WeakImplHelper< css::view::XSelectionChangeListener>
+    {
+        friend class OSelectionChangeListener;
+        css::uno::Reference< css::view::XSelectionSupplier>  m_xSet;
+        OSelectionChangeListener*                            m_pListener;
+        sal_Int32                                            m_nLockCount;
+
+        OSelectionChangeMultiplexer(const OSelectionChangeMultiplexer&) = delete;
+        OSelectionChangeMultiplexer& operator=(const OSelectionChangeMultiplexer&) = delete;
+
+        virtual ~OSelectionChangeMultiplexer() override;
+    public:
+        OSelectionChangeMultiplexer(OSelectionChangeListener* _pListener, const  css::uno::Reference< css::view::XSelectionSupplier>& _rxSet);
+
+    // XEventListener
+        virtual void SAL_CALL disposing( const  css::lang::EventObject& Source ) override;
+
+    // XSelectionChangeListener
+        virtual void SAL_CALL selectionChanged( const css::lang::EventObject& aEvent ) override;
+
+        /// incremental lock
+        void        lock();
+        /// incremental unlock
+        void        unlock();
+        /// get the lock count
+        sal_Int32   locked() const { return m_nLockCount; }
+
+        void dispose();
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_SELECTIONMULTIPLEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/SetFlagContextHelper.hxx b/include/comphelper/SetFlagContextHelper.hxx
new file mode 100644
index 000000000..b1b15eabb
--- /dev/null
+++ b/include/comphelper/SetFlagContextHelper.hxx
@@ -0,0 +1,71 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_SETFLAGCONTEXTHELPER_HXX
+#define INCLUDED_COMPHELPER_SETFLAGCONTEXTHELPER_HXX
+
+#include <com/sun/star/uno/XCurrentContext.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <uno/current_context.hxx>
+#include <utility>
+
+namespace comphelper
+{
+// Used to flag some named value to be true for all code running in this context
+class SetFlagContext final : public cppu::WeakImplHelper<css::uno::XCurrentContext>
+{
+public:
+    explicit SetFlagContext(OUString sName, css::uno::Reference<css::uno::XCurrentContext> xContext)
+        : m_sName(std::move(sName))
+        , mxNextContext(std::move(xContext))
+    {
+    }
+    SetFlagContext(const SetFlagContext&) = delete;
+    SetFlagContext& operator=(const SetFlagContext&) = delete;
+
+    virtual css::uno::Any SAL_CALL getValueByName(OUString const& Name) override
+    {
+        if (Name == m_sName)
+            return css::uno::Any(true);
+        else if (mxNextContext.is())
+            return mxNextContext->getValueByName(Name);
+        else
+            return css::uno::Any();
+    }
+
+private:
+    OUString m_sName;
+    css::uno::Reference<css::uno::XCurrentContext> mxNextContext;
+};
+
+// Returns a new context that reports the named value to be true
+inline css::uno::Reference<css::uno::XCurrentContext> NewFlagContext(const OUString& sName)
+{
+    return new SetFlagContext(sName, css::uno::getCurrentContext());
+}
+
+// A specialization for preventing "Java must be enabled" interaction
+inline css::uno::Reference<css::uno::XCurrentContext> NoEnableJavaInteractionContext()
+{
+    return NewFlagContext("DontEnableJava");
+}
+
+inline bool IsContextFlagActive(const OUString& sName)
+{
+    bool bFlag = false;
+    if (const auto xContext = css::uno::getCurrentContext())
+        xContext->getValueByName(sName) >>= bFlag;
+    return bFlag;
+}
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_SETFLAGCONTEXTHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accessiblecomponenthelper.hxx b/include/comphelper/accessiblecomponenthelper.hxx
new file mode 100644
index 000000000..963bea96b
--- /dev/null
+++ b/include/comphelper/accessiblecomponenthelper.hxx
@@ -0,0 +1,142 @@
+/* -*- 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_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
+
+#include <com/sun/star/accessibility/XAccessibleComponent.hpp>
+#include <com/sun/star/accessibility/XAccessibleExtendedComponent.hpp>
+#include <comphelper/accessiblecontexthelper.hxx>
+#include <cppuhelper/implbase1.hxx>
+#include <comphelper/uno3.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+
+namespace comphelper
+{
+
+
+    //= OCommonAccessibleComponent
+
+    /** base class encapsulating common functionality for the helper classes implementing
+        the XAccessibleComponent respectively XAccessibleExtendendComponent
+    */
+    class COMPHELPER_DLLPUBLIC OCommonAccessibleComponent : public OAccessibleContextHelper
+    {
+    protected:
+        /// see the respective base class ctor for an extensive comment on this, please
+        OCommonAccessibleComponent();
+        virtual ~OCommonAccessibleComponent() override;
+
+    protected:
+        /// implements the calculation of the bounding rectangle - still waiting to be overwritten
+        ///
+        /// @throws css::uno::RuntimeException
+        virtual css::awt::Rectangle implGetBounds(  ) = 0;
+
+    protected:
+        /** non-virtual versions of the methods which can be implemented using <method>implGetBounds</method>
+            note: getLocationOnScreen relies on a valid parent (XAccessibleContext::getParent()->getAccessibleContext()),
+                 which itself implements XAccessibleComponent
+
+            @throws css::uno::RuntimeException
+        */
+        bool containsPoint( const css::awt::Point& aPoint );
+        /// @throws css::uno::RuntimeException
+        css::awt::Point getLocation(  );
+        /// @throws css::uno::RuntimeException
+        css::awt::Point getLocationOnScreen(  );
+        /// @throws css::uno::RuntimeException
+        css::awt::Size getSize(  );
+        /// @throws css::uno::RuntimeException
+        css::awt::Rectangle getBounds(  );
+    };
+
+
+    //= OAccessibleComponentHelper
+
+
+    struct OAccessibleComponentHelper_Base :
+        public ::cppu::ImplHelper1< css::accessibility::XAccessibleComponent >
+    {
+    protected:
+        ~OAccessibleComponentHelper_Base() {}
+    };
+
+    /** a helper class for implementing an AccessibleContext which at the same time
+        supports an XAccessibleComponent interface.
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleComponentHelper
+            :public OCommonAccessibleComponent
+            ,public OAccessibleComponentHelper_Base
+    {
+    protected:
+        OAccessibleComponentHelper();
+
+    public:
+        // XInterface
+        DECLARE_XINTERFACE( )
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleComponent - default implementations
+        virtual sal_Bool SAL_CALL containsPoint( const css::awt::Point& aPoint ) override;
+        virtual css::awt::Point SAL_CALL getLocation(  ) override;
+        virtual css::awt::Point SAL_CALL getLocationOnScreen(  ) override;
+        virtual css::awt::Size SAL_CALL getSize(  ) override;
+        virtual css::awt::Rectangle SAL_CALL getBounds(  ) override;
+    };
+
+
+    //= OAccessibleExtendedComponentHelper
+
+
+    typedef ::cppu::ImplHelper1 <   css::accessibility::XAccessibleExtendedComponent
+                                >   OAccessibleExtendedComponentHelper_Base;
+
+    /** a helper class for implementing an AccessibleContext which at the same time
+        supports an XAccessibleExtendedComponent interface.
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleExtendedComponentHelper
+            :public OCommonAccessibleComponent
+            ,public OAccessibleExtendedComponentHelper_Base
+    {
+    protected:
+        OAccessibleExtendedComponentHelper( );
+
+    public:
+        // XInterface
+        DECLARE_XINTERFACE( )
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleComponent - default implementations
+        virtual sal_Bool SAL_CALL containsPoint( const css::awt::Point& aPoint ) override;
+        virtual css::awt::Point SAL_CALL getLocation(  ) override;
+        virtual css::awt::Point SAL_CALL getLocationOnScreen(  ) override;
+        virtual css::awt::Size SAL_CALL getSize(  ) override;
+        virtual css::awt::Rectangle SAL_CALL getBounds(  ) override;
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLECOMPONENTHELPER_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accessiblecontexthelper.hxx b/include/comphelper/accessiblecontexthelper.hxx
new file mode 100644
index 000000000..dc367fbe1
--- /dev/null
+++ b/include/comphelper/accessiblecontexthelper.hxx
@@ -0,0 +1,219 @@
+/* -*- 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_COMPHELPER_ACCESSIBLECONTEXTHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLECONTEXTHELPER_HXX
+
+#include <cppuhelper/compbase2.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <com/sun/star/accessibility/XAccessibleContext2.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
+#include <comphelper/accessibleeventnotifier.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/solarmutex.hxx>
+
+
+namespace comphelper
+{
+
+
+    //= OAccessibleContextHelper
+
+
+    typedef ::cppu::WeakAggComponentImplHelper2 <   css::accessibility::XAccessibleContext2,
+                                                    css::accessibility::XAccessibleEventBroadcaster
+                                                >   OAccessibleContextHelper_Base;
+
+    /** helper class for implementing an AccessibleContext
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleContextHelper
+                :public ::cppu::BaseMutex
+                ,public OAccessibleContextHelper_Base
+    {
+        friend class OContextEntryGuard;
+    private:
+        css::uno::WeakReference< css::accessibility::XAccessible > m_aCreator;         // the XAccessible which created our XAccessibleContext
+        AccessibleEventNotifier::TClientId m_nClientId;
+
+    protected:
+        virtual ~OAccessibleContextHelper( ) override;
+
+        OAccessibleContextHelper( );
+
+        /** late construction
+        @param _rxAccessible
+            the Accessible object which created this context.
+            <p>If your derived implementation implements the XAccessible (and does not follow the proposed
+            separation of XAccessible from XAccessibleContext), you may pass <code>this</code> here.</p>
+
+            <p>The object is hold weak, so its life time is not affected.</p>
+
+            <p>The object is needed for performance reasons: for <method>getAccessibleIndexInParent</method>,
+            all children (which are XAccessible's theirself) of our parent have to be asked. If we know our
+            XAccessible, we can compare it with all the children, instead of asking all children for their
+            context and comparing this context with ourself.</p>
+        */
+        void    lateInit( const css::uno::Reference< css::accessibility::XAccessible >& _rxAccessible );
+
+        /** retrieves the creator previously set with <method>lateInit</method>
+        */
+        css::uno::Reference< css::accessibility::XAccessible >
+                getAccessibleCreator( ) const;
+
+    public:
+        // XAccessibleEventBroadcaster
+        virtual void SAL_CALL addAccessibleEventListener( const css::uno::Reference< css::accessibility::XAccessibleEventListener >& xListener ) override;
+        virtual void SAL_CALL removeAccessibleEventListener( const css::uno::Reference< css::accessibility::XAccessibleEventListener >& xListener ) override;
+
+        // XAccessibleContext - still waiting to be overwritten
+        virtual sal_Int32 SAL_CALL getAccessibleChildCount(  ) override = 0;
+        virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleChild( sal_Int32 i ) override = 0;
+        virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleParent(  ) override = 0;
+        virtual sal_Int16 SAL_CALL getAccessibleRole(  ) override = 0;
+        virtual OUString SAL_CALL getAccessibleDescription(  ) override = 0;
+        virtual OUString SAL_CALL getAccessibleName(  ) override = 0;
+        virtual css::uno::Reference< css::accessibility::XAccessibleRelationSet > SAL_CALL getAccessibleRelationSet(  ) override = 0;
+        virtual css::uno::Reference< css::accessibility::XAccessibleStateSet > SAL_CALL getAccessibleStateSet(  ) override = 0;
+
+        // XAccessibleContext2 - default implementation
+        virtual OUString SAL_CALL getAccessibleId(  ) override;
+
+        // XAccessibleContext - default implementations
+        /** default implementation for retrieving the index of this object within the parent
+            <p>This basic implementation here returns the index <code>i</code> of the child for which
+                <code>&lt;parent&gt;.getAccessibleChild( i )</code> equals our creator.</p>
+        */
+        virtual sal_Int32 SAL_CALL getAccessibleIndexInParent(  ) override;
+        /** default implementation for retrieving the locale
+            <p>This basic implementation returns the locale of the parent context,
+            as retrieved via getAccessibleParent()->getAccessibleContext.</p>
+        */
+        virtual css::lang::Locale SAL_CALL getLocale(  ) override;
+
+    protected:
+        // OComponentHelper
+        virtual void SAL_CALL disposing() override;
+
+    protected:
+        // helper
+        /** notifies all AccessibleEventListeners of a certain event
+
+        @precond    not to be called with our mutex locked
+        @param  _nEventId
+            the id of the event. See AccessibleEventType
+        @param  _rOldValue
+            the old value to be notified
+        @param  _rNewValue
+            the new value to be notified
+        */
+        void NotifyAccessibleEvent(
+                    const sal_Int16 _nEventId,
+                    const css::uno::Any& _rOldValue,
+                    const css::uno::Any& _rNewValue
+                );
+
+        // life time control
+        /// checks whether the object is alive (returns <TRUE/> then) or disposed
+        bool    isAlive() const;
+        /// checks for being alive. If the object is already disposed (i.e. not alive), an exception is thrown.
+        void        ensureAlive() const;
+
+        /** ensures that the object is disposed.
+        @precond
+            to be called from within the destructor of your derived class only!
+        */
+        void        ensureDisposed( );
+
+        /** shortcut for retrieving the context of the parent (returned by getAccessibleParent)
+        */
+        css::uno::Reference< css::accessibility::XAccessibleContext >
+                    implGetParentContext();
+
+        // access to the base class' broadcast helper/mutex
+        ::osl::Mutex&                   GetMutex()                  { return m_aMutex; }
+    };
+
+
+    //= OContextEntryGuard
+
+    /** helper class for guarding the entry into OAccessibleContextHelper methods.
+
+        <p>The class has two responsibilities:
+        <ul><li>it locks the mutex of an OAccessibleContextHelper instance, as long as the guard lives</li>
+            <li>it checks if a given OAccessibleContextHelper instance is alive, else an exception is thrown
+                our of the constructor of the guard</li>
+        </ul>
+        <br/>
+        This makes it your first choice (hopefully :) for guarding any interface method implementations of
+        you derived class.
+        </p>
+    */
+    class OContextEntryGuard : public ::osl::ClearableMutexGuard
+    {
+    public:
+        /** constructs the guard
+
+            <p>The given context (it's mutex, respectively) is locked, and an exception is thrown if the context
+            is not alive anymore. In the latter case, of course, the mutex is freed, again.</p>
+
+        @param _pContext
+            the context which shall be guarded
+        @precond <arg>_pContext</arg> != NULL
+        */
+        inline OContextEntryGuard( OAccessibleContextHelper* _pContext );
+    };
+
+
+    inline OContextEntryGuard::OContextEntryGuard( OAccessibleContextHelper* _pContext  )
+        : ::osl::ClearableMutexGuard( _pContext->GetMutex() )
+    {
+        _pContext->ensureAlive();
+    }
+
+
+    //= OExternalLockGuard
+
+    class OExternalLockGuard
+            :public osl::Guard<SolarMutex>
+            ,public OContextEntryGuard
+    {
+    public:
+        inline OExternalLockGuard( OAccessibleContextHelper* _pContext );
+    };
+
+
+    inline OExternalLockGuard::OExternalLockGuard( OAccessibleContextHelper* _pContext )
+        :osl::Guard<SolarMutex>( SolarMutex::get() )
+        ,OContextEntryGuard( _pContext )
+    {
+        // Only lock the external mutex,
+        // release the ::osl::Mutex of the OAccessibleContextHelper instance.
+        // If you call into another UNO object with locked ::osl::Mutex,
+        // this may lead to dead locks.
+        clear();
+    }
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLECONTEXTHELPER_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accessibleeventnotifier.hxx b/include/comphelper/accessibleeventnotifier.hxx
new file mode 100644
index 000000000..75828cda6
--- /dev/null
+++ b/include/comphelper/accessibleeventnotifier.hxx
@@ -0,0 +1,116 @@
+/* -*- 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_COMPHELPER_ACCESSIBLEEVENTNOTIFIER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLEEVENTNOTIFIER_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::uno { class XInterface; }
+namespace com::sun::star::uno { template <class interface_type> class Reference; }
+namespace com::sun::star::accessibility { class XAccessibleEventListener; }
+namespace com::sun::star::accessibility { struct AccessibleEventObject; }
+
+namespace comphelper {
+
+class COMPHELPER_DLLPUBLIC AccessibleEventNotifier
+{
+public:
+    typedef sal_uInt32 TClientId;
+
+public:
+    AccessibleEventNotifier() = delete;
+    ~AccessibleEventNotifier() = delete;
+    AccessibleEventNotifier( const AccessibleEventNotifier& ) = delete;
+    AccessibleEventNotifier& operator=( const AccessibleEventNotifier& ) = delete;
+
+    /** registers a client of this class, means a broadcaster of AccessibleEvents
+
+        <p>No precaution is taken to care for disposal of this component. When the component
+        dies, it <b>must</b> call <member>revokeClient</member> or <member>revokeClientNotifyDisposing</member>
+        explicitly itself.</p>
+    */
+    static TClientId registerClient();
+
+    /** revokes a broadcaster of AccessibleEvents
+
+        <p>Note that no disposing event is fired when you use this method, the client is simply revoked.
+        You can for instance revoke a client if the last listener for it is revoked, but the client
+        itself is not disposed.<br/>
+        When the client is disposed, you should prefer <member>revokeClientNotifyDisposing</member></p>
+
+        <p>Any possibly pending events for this client are removed from the queue.</p>
+
+        @seealso revokeClientNotifyDisposing
+    */
+    static void revokeClient( const TClientId _nClient );
+
+    /** revokes a client, with additionally notifying a disposing event to all listeners registered for
+        this client
+
+        <p>Any other possibly pending events for this client are removed from the queue</p>
+
+        @param _nClient
+            the id of the client which should be revoked
+        @param _rxEventSource
+            the source to be notified together with the <member scope="com.sun.star.lang">XComponent::disposing</member>
+            call.
+    */
+    static void revokeClientNotifyDisposing(
+        const TClientId _nClient,
+        const css::uno::Reference< css::uno::XInterface >& _rxEventSource );
+
+    /** registers a listener for the given client
+
+        @param _nClient
+            the id of the client for which a listener should be registered
+        @return
+            the number of event listeners currently registered for this client
+    */
+    static sal_Int32 addEventListener(
+        const TClientId _nClient,
+        const css::uno::Reference< css::accessibility::XAccessibleEventListener >& _rxListener );
+
+    /** revokes a listener for the given client
+
+        @param _nClient
+            the id of the client for which a listener should be revoked
+        @return
+            the number of event listeners currently registered for this client
+    */
+    static sal_Int32 removeEventListener(
+        const TClientId _nClient,
+        const css::uno::Reference< css::accessibility::XAccessibleEventListener >& _rxListener );
+
+    /** adds an event, which is to be broadcasted, to the queue
+
+        @param _nClient
+            the id of the client which needs to broadcast the event
+    */
+    static void addEvent(
+        const TClientId _nClient,
+        const css::accessibility::AccessibleEventObject& _rEvent );
+
+};
+
+}   // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLEEVENTNOTIFIER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accessiblekeybindinghelper.hxx b/include/comphelper/accessiblekeybindinghelper.hxx
new file mode 100644
index 000000000..fe6b03521
--- /dev/null
+++ b/include/comphelper/accessiblekeybindinghelper.hxx
@@ -0,0 +1,70 @@
+/* -*- 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_COMPHELPER_ACCESSIBLEKEYBINDINGHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLEKEYBINDINGHELPER_HXX
+
+#include <com/sun/star/accessibility/XAccessibleKeyBinding.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <cppuhelper/implbase.hxx>
+#include <mutex>
+#include <vector>
+
+namespace comphelper
+{
+
+
+    // OAccessibleKeyBindingHelper
+
+
+    typedef ::cppu::WeakImplHelper <   css::accessibility::XAccessibleKeyBinding
+                                   >   OAccessibleKeyBindingHelper_Base;
+
+    /** a helper class for implementing an accessible keybinding
+     */
+    class COMPHELPER_DLLPUBLIC OAccessibleKeyBindingHelper final : public OAccessibleKeyBindingHelper_Base
+    {
+    private:
+        typedef ::std::vector< css::uno::Sequence< css::awt::KeyStroke > > KeyBindings;
+        KeyBindings     m_aKeyBindings;
+        std::mutex      m_aMutex;
+
+        virtual ~OAccessibleKeyBindingHelper() override;
+
+    public:
+        OAccessibleKeyBindingHelper();
+        OAccessibleKeyBindingHelper( const OAccessibleKeyBindingHelper& rHelper );
+
+        /// @throws css::uno::RuntimeException
+        void AddKeyBinding( const css::uno::Sequence< css::awt::KeyStroke >& rKeyBinding );
+        /// @throws css::uno::RuntimeException
+        void AddKeyBinding( const css::awt::KeyStroke& rKeyStroke );
+
+        // XAccessibleKeyBinding
+        virtual sal_Int32 SAL_CALL getAccessibleKeyBindingCount() override;
+        virtual css::uno::Sequence< css::awt::KeyStroke > SAL_CALL getAccessibleKeyBinding( sal_Int32 nIndex ) override;
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLEKEYBINDINGHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accessibleselectionhelper.hxx b/include/comphelper/accessibleselectionhelper.hxx
new file mode 100644
index 000000000..3a49c1ffd
--- /dev/null
+++ b/include/comphelper/accessibleselectionhelper.hxx
@@ -0,0 +1,135 @@
+/* -*- 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_COMPHELPER_ACCESSIBLESELECTIONHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLESELECTIONHELPER_HXX
+
+#include <config_options.h>
+#include <comphelper/uno3.hxx>
+#include <comphelper/accessiblecomponenthelper.hxx>
+#include <cppuhelper/implbase1.hxx>
+#include <com/sun/star/accessibility/XAccessibleSelection.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+#define ACCESSIBLE_SELECTION_CHILD_ALL  (sal_Int32(-1))
+#define ACCESSIBLE_SELECTION_CHILD_SELF ((sal_Int32)-2)
+
+
+namespace comphelper
+{
+
+
+    //= OCommonAccessibleSelection
+
+    /** base class encapsulating common functionality for the helper classes implementing
+        the XAccessibleSelection
+    */
+    class COMPHELPER_DLLPUBLIC OCommonAccessibleSelection
+    {
+    protected:
+
+        OCommonAccessibleSelection();
+
+        ~OCommonAccessibleSelection();
+
+    protected:
+
+        // access to context - still waiting to be overwritten
+        /// @throws css::uno::RuntimeException
+        virtual css::uno::Reference< css::accessibility::XAccessibleContext >
+            implGetAccessibleContext() = 0;
+
+        // return if the specified child is visible => watch for special ChildIndexes (ACCESSIBLE_SELECTION_CHILD_xxx)
+        /// @throws css::uno::RuntimeException
+        virtual bool
+            implIsSelected( sal_Int32 nAccessibleChildIndex ) = 0;
+
+        // select the specified child => watch for special ChildIndexes (ACCESSIBLE_SELECTION_CHILD_xxx)
+        /// @throws css::uno::RuntimeException
+        virtual void
+            implSelect( sal_Int32 nAccessibleChildIndex, bool bSelect ) = 0;
+
+    protected:
+
+        /** non-virtual versions of the methods which can be implemented using <method>implIsSelected</method> and <method>implSelect</method>
+
+            @throws css::lang::IndexOutOfBoundsException
+            @throws css::uno::RuntimeException
+        */
+        void selectAccessibleChild( sal_Int32 nChildIndex );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::uno::RuntimeException
+        bool isAccessibleChildSelected( sal_Int32 nChildIndex );
+        /// @throws css::uno::RuntimeException
+        void clearAccessibleSelection(  );
+        /// @throws css::uno::RuntimeException
+        void selectAllAccessibleChildren(  );
+        /// @throws css::uno::RuntimeException
+        sal_Int32 getSelectedAccessibleChildCount(  );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::uno::RuntimeException
+        css::uno::Reference< css::accessibility::XAccessible > getSelectedAccessibleChild( sal_Int32 nSelectedChildIndex );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::uno::RuntimeException
+        void deselectAccessibleChild( sal_Int32 nSelectedChildIndex );
+    };
+
+
+    //= OAccessibleSelectionHelper
+
+
+    typedef ::cppu::ImplHelper1< css::accessibility::XAccessibleSelection > OAccessibleSelectionHelper_Base;
+
+    /** a helper class for implementing an AccessibleSelection which at the same time
+        supports an XAccessibleSelection interface.
+    */
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OAccessibleSelectionHelper : public OAccessibleComponentHelper,
+                                       public OCommonAccessibleSelection,
+                                       public OAccessibleSelectionHelper_Base
+    {
+    protected:
+
+        OAccessibleSelectionHelper();
+
+        // return ourself here by default
+        virtual css::uno::Reference< css::accessibility::XAccessibleContext > implGetAccessibleContext() override;
+
+    public:
+
+        // XInterface
+        DECLARE_XINTERFACE( )
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleSelection - default implementations
+        virtual void SAL_CALL selectAccessibleChild( sal_Int32 nChildIndex ) override;
+        virtual sal_Bool SAL_CALL isAccessibleChildSelected( sal_Int32 nChildIndex ) override;
+        virtual void SAL_CALL clearAccessibleSelection(  ) override;
+        virtual void SAL_CALL selectAllAccessibleChildren(  ) override;
+        virtual sal_Int32 SAL_CALL getSelectedAccessibleChildCount(  ) override;
+        virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getSelectedAccessibleChild( sal_Int32 nSelectedChildIndex ) override;
+        virtual void SAL_CALL deselectAccessibleChild( sal_Int32 nSelectedChildIndex ) override;
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLESELECTIONHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accessibletexthelper.hxx b/include/comphelper/accessibletexthelper.hxx
new file mode 100644
index 000000000..607004aee
--- /dev/null
+++ b/include/comphelper/accessibletexthelper.hxx
@@ -0,0 +1,176 @@
+/* -*- 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_COMPHELPER_ACCESSIBLETEXTHELPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLETEXTHELPER_HXX
+
+#include <com/sun/star/accessibility/XAccessibleText.hpp>
+#include <com/sun/star/accessibility/TextSegment.hpp>
+#include <comphelper/accessiblecomponenthelper.hxx>
+#include <cppuhelper/implbase1.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::i18n { class XBreakIterator; }
+namespace com::sun::star::i18n { class XCharacterClassification; }
+namespace com::sun::star::i18n { struct Boundary; }
+
+namespace comphelper
+{
+
+
+    // OCommonAccessibleText
+
+    /** base class encapsulating common functionality for the helper classes implementing
+        the XAccessibleText
+    */
+    class COMPHELPER_DLLPUBLIC OCommonAccessibleText
+    {
+    private:
+        css::uno::Reference < css::i18n::XBreakIterator >             m_xBreakIter;
+        css::uno::Reference < css::i18n::XCharacterClassification >   m_xCharClass;
+
+    protected:
+        OCommonAccessibleText();
+        virtual ~OCommonAccessibleText();
+
+        css::uno::Reference < css::i18n::XBreakIterator > const &            implGetBreakIterator();
+        css::uno::Reference < css::i18n::XCharacterClassification > const &  implGetCharacterClassification();
+        static bool                      implIsValidBoundary( css::i18n::Boundary const & rBoundary, sal_Int32 nLength );
+        static bool                      implIsValidIndex( sal_Int32 nIndex, sal_Int32 nLength );
+        static bool                      implIsValidRange( sal_Int32 nStartIndex, sal_Int32 nEndIndex, sal_Int32 nLength );
+        static sal_Unicode               implGetCharacter( std::u16string_view rText, sal_Int32 nIndex );
+        static OUString                  implGetTextRange( std::u16string_view rText, sal_Int32 nStartIndex, sal_Int32 nEndIndex );
+        virtual OUString                 implGetText() = 0;
+        virtual css::lang::Locale        implGetLocale() = 0;
+        virtual void                     implGetSelection( sal_Int32& nStartIndex, sal_Int32& nEndIndex ) = 0;
+        void                             implGetGlyphBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        bool                             implGetWordBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        void                             implGetSentenceBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        virtual void                     implGetParagraphBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+        virtual void                     implGetLineBoundary( const OUString& rText, css::i18n::Boundary& rBoundary, sal_Int32 nIndex );
+
+        /** non-virtual versions of the methods
+
+            @throws css::lang::IndexOutOfBoundsException
+            @throws css::uno::RuntimeException
+        */
+        OUString getSelectedText();
+        /// @throws css::uno::RuntimeException
+        sal_Int32 getSelectionStart();
+        /// @throws css::uno::RuntimeException
+        sal_Int32 getSelectionEnd();
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::uno::RuntimeException
+        css::accessibility::TextSegment getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::uno::RuntimeException
+        css::accessibility::TextSegment getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::lang::IllegalArgumentException
+        /// @throws css::uno::RuntimeException
+        css::accessibility::TextSegment getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType );
+
+    public:
+
+        /** Helper method, that detects the difference between
+            two strings and returns the deleted selection and
+            the inserted selection if available.
+
+            @returns true if there are differences between the
+            two strings and false if both are equal
+
+            @see css::accessibility::AccessibleEventId
+                 css::accessibility::TextSegment
+        */
+        static bool implInitTextChangedEvent(
+            std::u16string_view rOldString,
+            std::u16string_view rNewString,
+            /*out*/ css::uno::Any& rDeleted,
+            /*out*/ css::uno::Any& rInserted); // throw()
+    };
+
+
+    // OAccessibleTextHelper
+
+
+    typedef ::cppu::ImplHelper1 <   css::accessibility::XAccessibleText
+                                >   OAccessibleTextHelper_Base;
+
+    /** a helper class for implementing an AccessibleExtendedComponent which at the same time
+        supports an XAccessibleText interface
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleTextHelper : public OAccessibleExtendedComponentHelper,
+                                  public OCommonAccessibleText,
+                                  public OAccessibleTextHelper_Base
+    {
+    protected:
+        OAccessibleTextHelper();
+
+    public:
+        // XInterface
+        DECLARE_XINTERFACE( )
+
+        // XTypeProvider
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleText
+        virtual OUString SAL_CALL getSelectedText() override;
+        virtual sal_Int32 SAL_CALL getSelectionStart() override;
+        virtual sal_Int32 SAL_CALL getSelectionEnd() override;
+        virtual css::accessibility::TextSegment SAL_CALL getTextAtIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;
+        virtual css::accessibility::TextSegment SAL_CALL getTextBeforeIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;
+        virtual css::accessibility::TextSegment SAL_CALL getTextBehindIndex( sal_Int32 nIndex, sal_Int16 aTextType ) override;
+    };
+
+
+}   // namespace comphelper
+
+
+//  OAccessibleTextHelper is a helper class for implementing the
+//  XAccessibleText interface.
+
+//  The following methods have a default implementation:
+
+//      getCharacter
+//      getSelectedText
+//      getSelectionStart
+//      getSelectionEnd
+//      getTextRange
+//      getTextAtIndex
+//      getTextBeforeIndex
+//      getTextBehindIndex
+
+//  The following methods must be overridden by derived classes:
+
+//      implGetText
+//      implGetLocale
+//      implGetSelection
+//      getCaretPosition
+//      setCaretPosition
+//      getCharacterAttributes
+//      getCharacterBounds
+//      getIndexAtPoint
+//      setSelection
+//      copyText
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLETEXTHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accessiblewrapper.hxx b/include/comphelper/accessiblewrapper.hxx
new file mode 100644
index 000000000..13fb29bff
--- /dev/null
+++ b/include/comphelper/accessiblewrapper.hxx
@@ -0,0 +1,401 @@
+/* -*- 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_COMPHELPER_ACCESSIBLEWRAPPER_HXX
+#define INCLUDED_COMPHELPER_ACCESSIBLEWRAPPER_HXX
+
+#include <config_options.h>
+#include <sal/config.h>
+
+#include <map>
+
+#include <comphelper/proxyaggregation.hxx>
+#include <com/sun/star/accessibility/XAccessible.hpp>
+#include <com/sun/star/accessibility/XAccessibleContext.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
+#include <com/sun/star/accessibility/XAccessibleEventListener.hpp>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <cppuhelper/implbase1.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <comphelper/uno3.hxx>
+#include <cppuhelper/interfacecontainer.h>
+#include <comphelper/accessibleeventnotifier.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ref.hxx>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace comphelper
+{
+
+
+    //= OAccessibleWrapper
+
+
+    class OAccessibleContextWrapper;
+    class OWrappedAccessibleChildrenManager;
+
+    struct OAccessibleWrapper_Base :
+        public ::cppu::ImplHelper1 < css::accessibility::XAccessible >
+    {
+    protected:
+        ~OAccessibleWrapper_Base() {}
+    };
+
+    /** a class which aggregates a proxy for an XAccessible, and wrapping the context returned by this
+        XAccessible.
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleWrapper:public OAccessibleWrapper_Base
+                            ,public OComponentProxyAggregation
+
+    {
+    private:
+        css::uno::Reference< css::accessibility::XAccessible >
+                m_xParentAccessible;
+        css::uno::WeakReference< css::accessibility::XAccessibleContext >
+                m_aContext;
+
+    protected:
+        css::uno::Reference< css::accessibility::XAccessible >
+                m_xInnerAccessible;
+
+    public:
+        /** ctor
+            @param _rxContext
+                a service factory
+
+            @param _rxInnerAccessible
+                the object to wrap
+
+            @param _rxParentAccessible
+                The XAccessible which is our parent
+        */
+        OAccessibleWrapper(
+            const css::uno::Reference< css::uno::XComponentContext >&     _rxContext,
+            const css::uno::Reference< css::accessibility::XAccessible >& _rxInnerAccessible,
+            const css::uno::Reference< css::accessibility::XAccessible >& _rxParentAccessible
+        );
+        DECLARE_XINTERFACE()
+        DECLARE_XTYPEPROVIDER()
+
+        // returns the context without creating it
+        css::uno::Reference< css::accessibility::XAccessibleContext >
+                    getContextNoCreate( ) const;
+
+    protected:
+        virtual css::uno::Reference< css::accessibility::XAccessibleContext > SAL_CALL
+                    getAccessibleContext(  ) override;
+
+        const css::uno::Reference< css::accessibility::XAccessible >&
+                    getParent() const { return m_xParentAccessible; }
+
+        // own overridables
+        virtual rtl::Reference<OAccessibleContextWrapper> createAccessibleContext(
+                const css::uno::Reference< css::accessibility::XAccessibleContext >& _rxInnerContext
+            );
+
+    protected:
+        virtual ~OAccessibleWrapper( ) override;
+
+    private:
+        OAccessibleWrapper( const OAccessibleWrapper& ) = delete;
+        OAccessibleWrapper& operator=( const OAccessibleWrapper& ) = delete;
+    };
+
+
+    //= OAccessibleContextWrapperHelper
+
+
+    typedef ::cppu::ImplHelper1 <   css::accessibility::XAccessibleEventListener
+                                >   OAccessibleContextWrapperHelper_Base;
+
+    /** Helper for wrapping an XAccessibleContext by aggregating a proxy for it.
+
+        <p>This class does not have own ref counting. In addition, it does not implement
+        the XAccessibleContext interface, but provides all the methods from this interface
+        which must be implemented using the inner context (such as getAccessibleChild*).</p>
+
+        <p>Children of the aggregated XAccessibleContext are wrapped, too.</p>
+
+        <p>AccessibleEvents fired by the inner context are multiplexed, especially, any references to
+        children in such events are translated. This means that even in such events, no un-wrapped object
+        will ever leave this class - if the aggregated context notifies a child event, the child passed
+        to the event is wrapped</p>
+
+        @seealso OAccessibleContextWrapper
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleContextWrapperHelper
+                :private OComponentProxyAggregationHelper
+                ,public OAccessibleContextWrapperHelper_Base
+    {
+    protected:
+        /// the context we're wrapping (properly typed, in opposite to OComponentProxyAggregationHelper::m_xInner)
+        css::uno::Reference< css::accessibility::XAccessibleContext >
+                                                            m_xInnerContext;
+        /// the XAccessible which created this context
+        css::uno::Reference< css::accessibility::XAccessible >
+                                                            m_xOwningAccessible;
+        /// the XAccessible which is to be returned in getAccessibleParent
+        css::uno::Reference< css::accessibility::XAccessible >
+                                                            m_xParentAccessible;
+
+        rtl::Reference<OWrappedAccessibleChildrenManager>   m_xChildMapper;     // for mapping children from our inner context to our callers
+
+    protected:
+        /** ctor
+
+            @param _rxContext
+                a service factory
+
+            @param _rxInnerAccessibleContext
+                the object to wrap
+
+            @param _rxOwningAccessible
+                The XAccessible which created this object. This is necessary because children
+                of our wrapped context need to be wrapped, too, and if they're asked for a parent,
+                they of course should return the proper parent<br/>
+                The object will be held with a hard reference
+
+            @param _rxParentAccessible
+                The XAccessible to return in the getAccessibleParent call
+        */
+        OAccessibleContextWrapperHelper(
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+            ::cppu::OBroadcastHelper& _rBHelper,
+            const css::uno::Reference< css::accessibility::XAccessibleContext >& _rxInnerAccessibleContext,
+            const css::uno::Reference< css::accessibility::XAccessible >& _rxOwningAccessible,
+            const css::uno::Reference< css::accessibility::XAccessible >& _rxParentAccessible
+        );
+
+        /// to be called from within your ctor - does the aggregation of a proxy for m_xInnerContext
+        void aggregateProxy(
+            oslInterlockedCount& _rRefCount,
+            ::cppu::OWeakObject& _rDelegator
+        );
+
+    protected:
+        // XInterface
+        css::uno::Any SAL_CALL queryInterface( const css::uno::Type& _rType ) override;
+
+        // XTypeProvider
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleContext
+        /// @throws css::uno::RuntimeException
+        sal_Int32 baseGetAccessibleChildCount(  );
+        /// @throws css::lang::IndexOutOfBoundsException
+        /// @throws css::uno::RuntimeException
+        css::uno::Reference< css::accessibility::XAccessible > baseGetAccessibleChild( sal_Int32 i );
+        /// @throws css::uno::RuntimeException
+        css::uno::Reference< css::accessibility::XAccessibleRelationSet > baseGetAccessibleRelationSet(  );
+
+        // XAccessibleEventListener
+        virtual void SAL_CALL notifyEvent( const css::accessibility::AccessibleEventObject& aEvent ) override;
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+        // XComponent/OComponentProxyAggregationHelper
+        virtual void SAL_CALL dispose() override;
+
+        // own overridables
+        /** notify an accessible event which has been translated (if necessary)
+
+            <p>Usually, you derive your class from both OAccessibleContextWrapperHelper and XAccessibleEventBroadcaster,
+            and simply call all your XAccessibleEventListener with the given event.</p>
+
+            <p>The mutex of the BroadcastHelper passed to the instance's ctor is <em>not</em> locked when calling
+            into this method</p>
+
+            @throws css::uno::RuntimeException
+        */
+        virtual void notifyTranslatedEvent( const css::accessibility::AccessibleEventObject& _rEvent ) = 0;
+
+    protected:
+        virtual ~OAccessibleContextWrapperHelper( ) override;
+
+        OAccessibleContextWrapperHelper(const OAccessibleContextWrapperHelper&) = delete;
+        OAccessibleContextWrapperHelper& operator=(const OAccessibleContextWrapperHelper&) = delete;
+    };
+
+
+    //= OAccessibleContextWrapper
+
+    typedef ::cppu::WeakComponentImplHelper<    css::accessibility::XAccessibleEventBroadcaster
+                                            ,   css::accessibility::XAccessibleContext
+                                            >   OAccessibleContextWrapper_CBase;
+
+    class COMPHELPER_DLLPUBLIC OAccessibleContextWrapper
+                    :public cppu::BaseMutex
+                    ,public OAccessibleContextWrapper_CBase
+                    ,public OAccessibleContextWrapperHelper
+    {
+    private:
+        ::comphelper::AccessibleEventNotifier::TClientId    m_nNotifierClient;      // for notifying AccessibleEvents
+
+    public:
+        /** ctor
+
+            @param _rxContext
+                a service factory
+
+            @param _rxInnerAccessibleContext
+                the object to wrap
+
+            @param _rxOwningAccessible
+                The XAccessible which created this object. This is necessary because children
+                of our wrapped context need to be wrapped, too, and if they're asked for a parent,
+                they of course should return the proper parent<br/>
+                The object will be held with a hard reference
+
+            @param _rxParentAccessible
+                The XAccessible to return in the getAccessibleParent call
+        */
+        OAccessibleContextWrapper(
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+            const css::uno::Reference< css::accessibility::XAccessibleContext >& _rxInnerAccessibleContext,
+            const css::uno::Reference< css::accessibility::XAccessible >& _rxOwningAccessible,
+            const css::uno::Reference< css::accessibility::XAccessible >& _rxParentAccessible
+        );
+
+        // XInterface
+        DECLARE_XINTERFACE( )
+        // XTypeProvider
+        DECLARE_XTYPEPROVIDER( )
+
+        // XAccessibleContext
+        virtual sal_Int32 SAL_CALL getAccessibleChildCount(  ) override;
+        virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleChild( sal_Int32 i ) override;
+        virtual css::uno::Reference< css::accessibility::XAccessible > SAL_CALL getAccessibleParent(  ) override;
+        virtual sal_Int32 SAL_CALL getAccessibleIndexInParent(  ) override;
+        virtual sal_Int16 SAL_CALL getAccessibleRole(  ) override;
+        virtual OUString SAL_CALL getAccessibleDescription(  ) override;
+        virtual OUString SAL_CALL getAccessibleName(  ) override;
+        virtual css::uno::Reference< css::accessibility::XAccessibleRelationSet > SAL_CALL getAccessibleRelationSet(  ) override;
+        virtual css::uno::Reference< css::accessibility::XAccessibleStateSet > SAL_CALL getAccessibleStateSet(  ) override;
+        virtual css::lang::Locale SAL_CALL getLocale(  ) override;
+
+        // XAccessibleEventBroadcaster
+        virtual void SAL_CALL addAccessibleEventListener( const css::uno::Reference< css::accessibility::XAccessibleEventListener >& xListener ) override;
+        virtual void SAL_CALL removeAccessibleEventListener( const css::uno::Reference< css::accessibility::XAccessibleEventListener >& xListener ) override;
+
+        // OAccessibleContextWrapper
+        virtual void notifyTranslatedEvent( const css::accessibility::AccessibleEventObject& _rEvent ) override;
+
+        // OComponentHelper
+        using OAccessibleContextWrapperHelper::disposing;
+        virtual void SAL_CALL disposing() override;
+
+    protected:
+        virtual ~OAccessibleContextWrapper() override;
+
+    private:
+        OAccessibleContextWrapper( const OAccessibleContextWrapper& ) = delete;
+        OAccessibleContextWrapper& operator=( const OAccessibleContextWrapper& ) = delete;
+    };
+
+
+    //= OWrappedAccessibleChildrenManager
+
+
+    typedef ::std::map  <   css::uno::Reference< css::accessibility::XAccessible >
+                        ,   rtl::Reference< comphelper::OAccessibleWrapper >
+                        >   AccessibleMap;
+                        // TODO: think about if we should hold these objects weak
+
+    typedef ::cppu::WeakImplHelper<   css::lang::XEventListener
+                                  >   OWrappedAccessibleChildrenManager_Base;
+    /** manages wrapping XAccessible's to XAccessible's
+    */
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OWrappedAccessibleChildrenManager final : public OWrappedAccessibleChildrenManager_Base
+    {
+        css::uno::Reference< css::uno::XComponentContext >
+                                m_xContext;
+        css::uno::WeakReference< css::accessibility::XAccessible >
+                                m_aOwningAccessible;    // the XAccessible which belongs to the XAccessibleContext which we work for
+        AccessibleMap           m_aChildrenMap;         // for caching children
+        bool                    m_bTransientChildren;   // are we prohibited to cache our children?
+
+    public:
+        /// ctor
+        OWrappedAccessibleChildrenManager(
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext
+        );
+
+        /** specifies if the children are to be considered transient (i.e.: not cached)
+            <p>to be called only once per lifetime</p>
+        */
+        void    setTransientChildren( bool _bSet );
+
+        /** sets the XAccessible which belongs to the XAccessibleContext which we work for
+            <p>to be called only once per lifetime</p>
+        */
+        void    setOwningAccessible( const css::uno::Reference< css::accessibility::XAccessible >& _rxAcc );
+
+        /// retrieves a wrapper for the given accessible
+        css::uno::Reference< css::accessibility::XAccessible >
+                getAccessibleWrapperFor(
+                    const css::uno::Reference< css::accessibility::XAccessible >& _rxKey
+                );
+
+        /// erases the given key from the map (if it is present there)
+        void    removeFromCache( const css::uno::Reference< css::accessibility::XAccessible >& _rxKey );
+
+        /// invalidates (i.e. empties) the map
+        void    invalidateAll( );
+
+        /** disposes (i.e. clears) the manager
+
+            <p>Note that the XAccessibleContext's of the mapped XAccessible objects are disposed, too.</p>
+        */
+        void    dispose();
+
+        /** handles a notification as got from the parent of the children we're managing
+            <p>This applies only to the notifications which have a direct impact on our map.</p>
+        */
+        void    handleChildNotification( const css::accessibility::AccessibleEventObject& _rEvent );
+
+        /** translates events as got from the parent of the children we're managing
+            <p>This applies only to the notifications which deal with child objects which we manage.</p>
+        */
+        void    translateAccessibleEvent(
+            const   css::accessibility::AccessibleEventObject& _rEvent,
+                    css::accessibility::AccessibleEventObject& _rTranslatedEvent
+        );
+
+    private:
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+        void    implTranslateChildEventValue( const css::uno::Any& _rInValue, css::uno::Any& _rOutValue );
+
+        virtual ~OWrappedAccessibleChildrenManager( ) override;
+
+        OWrappedAccessibleChildrenManager( const OWrappedAccessibleChildrenManager& ) = delete;
+        OWrappedAccessibleChildrenManager& operator=( const OWrappedAccessibleChildrenManager& ) = delete;
+    };
+
+
+}   // namespace accessibility
+
+
+#endif // INCLUDED_COMPHELPER_ACCESSIBLEWRAPPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/accimplaccess.hxx b/include/comphelper/accimplaccess.hxx
new file mode 100644
index 000000000..e716d4d18
--- /dev/null
+++ b/include/comphelper/accimplaccess.hxx
@@ -0,0 +1,73 @@
+/* -*- 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_COMPHELPER_ACCIMPLACCESS_HXX
+#define INCLUDED_COMPHELPER_ACCIMPLACCESS_HXX
+
+#include <cppuhelper/implbase1.hxx>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper
+{
+    //= OAccessibleImplementationAccess
+
+    typedef ::cppu::ImplHelper1 <   css::lang::XUnoTunnel
+                                >   OAccImpl_Base;
+
+    /** This is a helper class which allows accessing several aspects of the implementation
+        of an AccessibleContext.
+
+        <p>For instance, when you want to implement a context which can be re-parented, you:
+            <ul><li>derive your class from OAccessibleImplementationAccess</li>
+                <li>use <code>setAccessibleParent( <em>component</em>, <em>new_parent</em> )</code>
+            </ul>
+        </p>
+
+        <p>Another aspect which can be controlled from the outside are states. If you have a class which
+        has only partial control over it's states, you may consider deriving from OAccessibleImplementationAccess.<br/>
+        For instance, say you have an implementation (say component A) which is <em>unable</em> to know or to
+        determine if the represented object is selected, but another component (say B) which uses A (and integrates
+        it into a tree of accessibility components) is.<br/>
+        In this case, if A is derived from OAccessibleImplementationAccess, B can manipulate this
+        foreign-controlled state flag "SELECTED" by using the static helper methods on this class.</p>
+
+        <p>Please note that the support for foreign controlled states is rather restrictive: You can't have states
+        which <em>may be</em> controlled by a foreign instances. This is implied by the fact that a derived
+        class can ask for states which are <em>set</em> only, not for the ones which are <em>reset</em> currently.
+        </p>
+    */
+    class COMPHELPER_DLLPUBLIC OAccessibleImplementationAccess : public OAccImpl_Base
+    {
+    protected:
+        OAccessibleImplementationAccess( );
+        virtual ~OAccessibleImplementationAccess( );
+
+        // XUnoTunnel
+        virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& _rIdentifier ) override;
+
+    public:
+        COMPHELPER_DLLPRIVATE static const css::uno::Sequence<sal_Int8> & getUnoTunnelId();
+    };
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_ACCIMPLACCESS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/anycompare.hxx b/include/comphelper/anycompare.hxx
new file mode 100644
index 000000000..3618106db
--- /dev/null
+++ b/include/comphelper/anycompare.hxx
@@ -0,0 +1,219 @@
+/* -*- 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_COMPHELPER_ANYCOMPARE_HXX
+#define INCLUDED_COMPHELPER_ANYCOMPARE_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/i18n/XCollator.hpp>
+
+#include <comphelper/extract.hxx>
+
+#include <memory>
+#include <utility>
+
+
+namespace comphelper
+{
+
+
+    //= IKeyPredicateLess
+
+    class SAL_NO_VTABLE IKeyPredicateLess
+    {
+    public:
+        virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const = 0;
+        virtual ~IKeyPredicateLess() {}
+    };
+
+
+    //= LessPredicateAdapter
+
+    struct LessPredicateAdapter
+    {
+        LessPredicateAdapter( const IKeyPredicateLess& _predicate )
+            :m_predicate( _predicate )
+        {
+        }
+
+        bool operator()( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const
+        {
+            return m_predicate.isLess( _lhs, _rhs );
+        }
+
+    private:
+        IKeyPredicateLess const &   m_predicate;
+    };
+
+
+    //= ScalarPredicateLess
+
+    template< typename SCALAR >
+    class ScalarPredicateLess final : public IKeyPredicateLess
+    {
+    public:
+        virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+        {
+            SCALAR lhs(0), rhs(0);
+            if  (   !( _lhs >>= lhs )
+                ||  !( _rhs >>= rhs )
+                )
+                throw css::lang::IllegalArgumentException();
+            return lhs < rhs;
+        }
+    };
+
+
+    //= StringPredicateLess
+
+    class StringPredicateLess final : public IKeyPredicateLess
+    {
+    public:
+        virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+        {
+            OUString lhs, rhs;
+            if  (   !( _lhs >>= lhs )
+                ||  !( _rhs >>= rhs )
+                )
+                throw css::lang::IllegalArgumentException();
+            return lhs < rhs;
+        }
+    };
+
+
+    //= StringCollationPredicateLess
+
+    class StringCollationPredicateLess final : public IKeyPredicateLess
+    {
+    public:
+        StringCollationPredicateLess( css::uno::Reference< css::i18n::XCollator >  i_collator )
+            :m_collator(std::move( i_collator ))
+        {
+        }
+
+        virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+        {
+            OUString lhs, rhs;
+            if  (   !( _lhs >>= lhs )
+                ||  !( _rhs >>= rhs )
+                )
+                throw css::lang::IllegalArgumentException();
+            return m_collator->compareString( lhs, rhs ) < 0;
+        }
+
+    private:
+        css::uno::Reference< css::i18n::XCollator > const m_collator;
+    };
+
+
+    //= TypePredicateLess
+
+    class TypePredicateLess final : public IKeyPredicateLess
+    {
+    public:
+        virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+        {
+            css::uno::Type lhs, rhs;
+            if  (   !( _lhs >>= lhs )
+                ||  !( _rhs >>= rhs )
+                )
+                throw css::lang::IllegalArgumentException();
+            return lhs.getTypeName() < rhs.getTypeName();
+        }
+    };
+
+
+    //= EnumPredicateLess
+
+    class EnumPredicateLess final : public IKeyPredicateLess
+    {
+    public:
+        EnumPredicateLess( css::uno::Type const & _enumType )
+            :m_enumType( _enumType )
+        {
+        }
+
+        virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+        {
+            sal_Int32 lhs(0), rhs(0);
+            if  (   !::cppu::enum2int( lhs, _lhs )
+                ||  !::cppu::enum2int( rhs, _rhs )
+                ||  !_lhs.getValueType().equals( m_enumType )
+                ||  !_rhs.getValueType().equals( m_enumType )
+                )
+                throw css::lang::IllegalArgumentException();
+            return lhs < rhs;
+        }
+
+    private:
+        css::uno::Type const   m_enumType;
+    };
+
+
+    //= InterfacePredicateLess
+
+    class InterfacePredicateLess final : public IKeyPredicateLess
+    {
+    public:
+        virtual bool isLess( css::uno::Any const & _lhs, css::uno::Any const & _rhs ) const override
+        {
+            if  (   ( _lhs.getValueTypeClass() != css::uno::TypeClass_INTERFACE )
+                ||  ( _rhs.getValueTypeClass() != css::uno::TypeClass_INTERFACE )
+                )
+                throw css::lang::IllegalArgumentException();
+
+            css::uno::Reference< css::uno::XInterface > lhs( _lhs, css::uno::UNO_QUERY );
+            css::uno::Reference< css::uno::XInterface > rhs( _rhs, css::uno::UNO_QUERY );
+            return lhs.get() < rhs.get();
+        }
+    };
+
+
+    //= getStandardLessPredicate
+
+    /** creates a default IKeyPredicateLess instance for the given UNO type
+        @param i_type
+            the type for which a predicate instance should be created
+        @param i_collator
+            specifies a collator instance to use, or <NULL/>. If <NULL/>, strings will be compared using the <code>&lt</code>
+            operator, otherwise the collator will be used. The parameter is ignored if <arg>i_type</arg> does not specify
+            the string type.
+        @return
+            a default implementation of IKeyPredicateLess, which is able to compare values of the given type. If no
+            such default implementation is known for the given type, then <NULL/> is returned.
+    */
+    ::std::unique_ptr< IKeyPredicateLess > COMPHELPER_DLLPUBLIC
+        getStandardLessPredicate(
+            css::uno::Type const & i_type,
+            css::uno::Reference< css::i18n::XCollator > const & i_collator
+        );
+
+    /**
+        Compare two Anys.
+    */
+    bool COMPHELPER_DLLPUBLIC anyLess( css::uno::Any const & lhs, css::uno::Any const & rhs);
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ANYCOMPARE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/anytohash.hxx b/include/comphelper/anytohash.hxx
new file mode 100644
index 000000000..0aa14f47e
--- /dev/null
+++ b/include/comphelper/anytohash.hxx
@@ -0,0 +1,48 @@
+/* -*- 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_COMPHELPER_ANYTOHASH_HXX
+#define INCLUDED_COMPHELPER_ANYTOHASH_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <optional>
+
+namespace com::sun::star::uno
+{
+class Any;
+}
+
+namespace comphelper
+{
+/** Tries to get a hash value for an ANY value.
+
+    Not all cases may be implemented, in which case no value is returned.
+
+    @param value
+           ANY value
+    @return
+           hash of given ANY value, or not available
+*/
+COMPHELPER_DLLPUBLIC std::optional<size_t> anyToHash(css::uno::Any const& value);
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/anytostring.hxx b/include/comphelper/anytostring.hxx
new file mode 100644
index 000000000..6d100221e
--- /dev/null
+++ b/include/comphelper/anytostring.hxx
@@ -0,0 +1,45 @@
+/* -*- 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_COMPHELPER_ANYTOSTRING_HXX
+#define INCLUDED_COMPHELPER_ANYTOSTRING_HXX
+
+#include <rtl/ustring.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::uno
+{
+class Any;
+}
+
+namespace comphelper
+{
+/** Creates a STRING representation out of an ANY value.
+
+    @param value
+           ANY value
+    @return
+           STRING representation of given ANY value
+*/
+COMPHELPER_DLLPUBLIC OUString anyToString(css::uno::Any const& value);
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/asyncnotification.hxx b/include/comphelper/asyncnotification.hxx
new file mode 100644
index 000000000..ea6b067cc
--- /dev/null
+++ b/include/comphelper/asyncnotification.hxx
@@ -0,0 +1,226 @@
+/* -*- 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_COMPHELPER_ASYNCNOTIFICATION_HXX
+#define INCLUDED_COMPHELPER_ASYNCNOTIFICATION_HXX
+
+#include <sal/config.h>
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ref.hxx>
+#include <sal/types.h>
+#include <salhelper/thread.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+#include <memory>
+#include <utility>
+
+namespace comphelper
+{
+    //= AnyEvent
+
+    /** the very basic instance to hold a description of an event
+    */
+    class COMPHELPER_DLLPUBLIC AnyEvent : public salhelper::SimpleReferenceObject
+    {
+    public:
+        AnyEvent();
+
+    protected:
+        virtual ~AnyEvent() override;
+
+    private:
+        AnyEvent( AnyEvent const & ) = delete;
+        AnyEvent& operator=( AnyEvent const & ) = delete;
+    };
+
+
+    //= typedefs
+
+    typedef ::rtl::Reference< AnyEvent >    AnyEventRef;
+
+
+    //= IEventProcessor
+
+    /** an event processor
+
+        @see AsyncEventNotifier
+    */
+    class SAL_NO_VTABLE IEventProcessor
+    {
+    public:
+        /** process a single event
+        */
+        virtual void processEvent( const AnyEvent& _rEvent ) = 0;
+
+        virtual void SAL_CALL acquire() noexcept = 0;
+        virtual void SAL_CALL release() noexcept = 0;
+
+    protected:
+        ~IEventProcessor() {}
+    };
+
+
+    //= AsyncEventNotifier
+
+    struct EventNotifierImpl;
+
+    /** a helper class for notifying events asynchronously
+
+        If you need to notify certain events to external components, you usually should
+        not do this while you have mutexes locked, to prevent multi-threading issues.
+
+        However, you do not always have complete control over all mutex guards on the stack.
+        If, in such a case, the listener notification is one-way, you can decide to do it
+        asynchronously.
+
+        The ->AsyncEventNotifier helps you to process such events asynchronously. Every
+        event is tied to an ->IEventProcessor which is responsible for processing it.
+
+        The AsyncEventNotifier is implemented as a thread itself, which sleeps as long as there are no
+        events in the queue. As soon as you add an event, the thread is woken up, processes the event,
+        and sleeps again.
+    */
+    class COMPHELPER_DLLPUBLIC AsyncEventNotifierBase
+    {
+        friend struct EventNotifierImpl;
+
+    protected:
+        std::unique_ptr<EventNotifierImpl>        m_xImpl;
+
+        SAL_DLLPRIVATE virtual ~AsyncEventNotifierBase();
+
+        // Thread
+        SAL_DLLPRIVATE virtual void execute();
+
+    public:
+        AsyncEventNotifierBase();
+
+        /** terminates the thread
+
+            Note that this is a cooperative termination - if you call this from a thread different
+            from the notification thread itself, then it will block until the notification thread
+            finished processing the current event. If you call it from the notification thread
+            itself, it will return immediately, and the thread will be terminated as soon as
+            the current notification is finished.
+        */
+        virtual void SAL_CALL terminate();
+
+        /** adds an event to the queue, together with the instance which is responsible for
+            processing it
+
+            @param _rEvent
+                the event to add to the queue
+            @param _xProcessor
+                the processor for the event.<br/>
+                Beware of life time issues here. If your event processor dies or becomes otherwise
+                nonfunctional, you are responsible for removing all respective events from the queue.
+                You can do this by calling ->removeEventsForProcessor
+        */
+        void addEvent( const AnyEventRef& _rEvent, const ::rtl::Reference< IEventProcessor >& _xProcessor );
+
+        /** removes all events for the given event processor from the queue
+        */
+        void removeEventsForProcessor( const ::rtl::Reference< IEventProcessor >& _xProcessor );
+    };
+
+    /** This class is usable with rtl::Reference.
+        As always, the thread must be joined somewhere.
+     */
+    class COMPHELPER_DLLPUBLIC AsyncEventNotifier final
+        : public AsyncEventNotifierBase
+        , public salhelper::Thread
+    {
+
+    private:
+        SAL_DLLPRIVATE virtual ~AsyncEventNotifier() override;
+
+        SAL_DLLPRIVATE virtual void execute() override;
+
+    public:
+        /** constructs a notifier thread
+
+            @param name the thread name, see ::osl_setThreadName; must not be
+            null
+        */
+        AsyncEventNotifier(char const* name);
+
+        virtual void SAL_CALL terminate() override;
+    };
+
+    /** This is a hack (when proper joining is not possible), use of which
+        should be avoided by good design.
+     */
+    class COMPHELPER_DLLPUBLIC AsyncEventNotifierAutoJoin final
+        : public AsyncEventNotifierBase
+        , private osl::Thread
+    {
+
+    private:
+        SAL_DLLPRIVATE AsyncEventNotifierAutoJoin(char const* name);
+
+        SAL_DLLPRIVATE virtual void SAL_CALL run() override;
+        SAL_DLLPRIVATE virtual void SAL_CALL onTerminated() override;
+
+    public:
+        // only public so shared_ptr finds it
+        SAL_DLLPRIVATE virtual ~AsyncEventNotifierAutoJoin() override;
+
+        static std::shared_ptr<AsyncEventNotifierAutoJoin>
+            newAsyncEventNotifierAutoJoin(char const* name);
+
+        virtual void SAL_CALL terminate() override;
+
+        using osl::Thread::join;
+        using osl::Thread::operator new;
+        using osl::Thread::operator delete; // clang really wants this?
+
+        static void launch(std::shared_ptr<AsyncEventNotifierAutoJoin> const&);
+    };
+
+
+    //= EventHolder
+
+    /** AnyEvent derivee holding a foreign event instance
+    */
+    template < typename EVENT_OBJECT >
+    class SAL_DLLPUBLIC_RTTI EventHolder final : public AnyEvent
+    {
+    public:
+        typedef EVENT_OBJECT    EventObjectType;
+
+    private:
+        EventObjectType const m_aEvent;
+
+    public:
+        EventHolder( EventObjectType _aEvent )
+            :m_aEvent(std::move( _aEvent ))
+        {
+        }
+
+        const EventObjectType& getEventObject() const { return m_aEvent; }
+    };
+
+    COMPHELPER_DLLPUBLIC void JoinAsyncEventNotifiers();
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_ASYNCNOTIFICATION_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/asyncquithandler.hxx b/include/comphelper/asyncquithandler.hxx
new file mode 100644
index 000000000..ce3db23a1
--- /dev/null
+++ b/include/comphelper/asyncquithandler.hxx
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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_COMPHELPER_ASYNCQUITHANDLER_HXX
+#define INCLUDED_COMPHELPER_ASYNCQUITHANDLER_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <tools/link.hxx>
+
+// Use: Application::PostUserEvent( LINK( &AsyncQuitHandler::instance(), AsyncQuitHandler, OnAsyncQuit ) );
+
+class COMPHELPER_DLLPUBLIC AsyncQuitHandler
+{
+    AsyncQuitHandler();
+
+public:
+    AsyncQuitHandler(const AsyncQuitHandler&) = delete;
+    const AsyncQuitHandler& operator=(const AsyncQuitHandler&) = delete;
+
+    static AsyncQuitHandler& instance();
+    static void QuitApplication();
+
+    DECL_STATIC_LINK(AsyncQuitHandler, OnAsyncQuit, void*, void);
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/attributelist.hxx b/include/comphelper/attributelist.hxx
new file mode 100644
index 000000000..0309ab608
--- /dev/null
+++ b/include/comphelper/attributelist.hxx
@@ -0,0 +1,92 @@
+/* -*- 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_COMPHELPER_ATTRIBUTELIST_HXX
+#define INCLUDED_COMPHELPER_ATTRIBUTELIST_HXX
+
+#include <sal/config.h>
+
+#include <memory>
+#include <vector>
+
+#include <com/sun/star/util/XCloneable.hpp>
+#include <com/sun/star/xml/sax/XAttributeList.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper
+{
+
+struct TagAttribute
+{
+    OUString sName;
+    OUString sType;
+    OUString sValue;
+};
+
+class COMPHELPER_DLLPUBLIC AttributeList final :
+    public ::cppu::WeakImplHelper<css::xml::sax::XAttributeList, css::util::XCloneable>
+{
+    std::vector<TagAttribute> mAttributes;
+public:
+    AttributeList();
+    AttributeList(const AttributeList &r);
+
+    virtual ~AttributeList() override;
+
+    // methods that are not contained in any interface
+    void AddAttribute(const OUString &sName , const OUString &sType , const OUString &sValue)
+    {
+        mAttributes.push_back({sName, sType, sValue});
+    }
+    void Clear()
+    {
+        mAttributes.clear();
+    }
+
+    // css::xml::sax::XAttributeList
+    virtual sal_Int16 SAL_CALL getLength() override
+    {
+        return static_cast<sal_Int16>(mAttributes.size());
+    }
+    virtual OUString SAL_CALL getNameByIndex(sal_Int16 i) override
+    {
+        return mAttributes[i].sName;
+    }
+    virtual OUString SAL_CALL getTypeByIndex(sal_Int16 i) override
+    {
+        return mAttributes[i].sType;
+    }
+    virtual OUString SAL_CALL getTypeByName(const OUString& aName) override;
+    virtual OUString SAL_CALL getValueByIndex(sal_Int16 i) override
+    {
+        return mAttributes[i].sValue;
+    }
+    virtual OUString SAL_CALL getValueByName(const OUString& aName) override;
+
+    // css::util::XCloneable
+    virtual css::uno::Reference< XCloneable > SAL_CALL
+        createClone() override;
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_ATTRIBUTELIST_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/automationinvokedzone.hxx b/include/comphelper/automationinvokedzone.hxx
new file mode 100644
index 000000000..81b0bfab6
--- /dev/null
+++ b/include/comphelper/automationinvokedzone.hxx
@@ -0,0 +1,36 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_AUTOMATIONINVOKEDZONE_HXX
+#define INCLUDED_COMPHELPER_AUTOMATIONINVOKEDZONE_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+// Helpers for use when calling into LO from an Automation (OLE
+// Automation) client.
+
+namespace comphelper::Automation
+{
+// Create an object of this class at the start of a function directly invoked from an Automation
+// client.
+
+class COMPHELPER_DLLPUBLIC AutomationInvokedZone
+{
+public:
+    AutomationInvokedZone();
+
+    ~AutomationInvokedZone();
+
+    static bool isActive();
+};
+}
+
+#endif // INCLUDED_COMPHELPER_AUTOMATIONINVOKEDZONE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/backupfilehelper.hxx b/include/comphelper/backupfilehelper.hxx
new file mode 100644
index 000000000..abf8044a2
--- /dev/null
+++ b/include/comphelper/backupfilehelper.hxx
@@ -0,0 +1,216 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_BACKUPFILEHELPER_HXX
+#define INCLUDED_COMPHELPER_BACKUPFILEHELPER_HXX
+
+#include <sal/config.h>
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+#include <set>
+#include <string_view>
+#include <vector>
+
+namespace comphelper
+{
+    /** Helper class to backup/restore a single file
+     *
+     *  This is a general class to manage backups/restore of the file
+     *  given by the URL. The container holding the backups is created
+     *  aside the original file, e.g for 'test.txt' a container
+     *  called '.test.pack' will be used. If it was not yet backed-up
+     *  this container file will be created at the 1st backup and deleted
+     *  when the last gets removed. The container holds a stack with a
+     *  maximum given number (in the constructor) of copies, these are by
+     *  default compressed, but don't have to be (see tryPush).
+     *
+     *  Due to being on a low system level here, no UNO API and not much
+     *  other tooling can be used, as a consequence for the container a
+     *  own simple format is used and e.g. the zip lib directly.
+     *
+     *  You need to hand over the URL of the file to look at and
+     *  a maximum number of allowed copies. That number is internally
+     *  limited to an absolute max of 10 (see implementation). The number
+     *  of allowed copies is limited to [1..max].
+     *
+     *  Calling tryPush() will check if there is no backup yet or if
+     *  there is one that the file has changed. If yes, a new copy is
+     *  created on a kind of 'stack' of copies. The return value can
+     *  be used to see if a backup was indeed created.
+     *
+     *  Calling tryPop() will do the opposite: if a backup is available,
+     *  delete the orig file and re-instantiate the backup. The backup
+     *  is taken off the 'stack' of copies. The return value can be
+     *  used to check if this was done.
+     *
+     *  isPopPossible can be called to see if there is a backup available
+     *  before calling tryPop().
+     *
+     *  The 'stack' of copies works by using the same path, filename
+     *  and extension, but adding a '_1' -> '_(num_of_copy)' to it.
+     */
+    class COMPHELPER_DLLPUBLIC BackupFileHelper
+    {
+    private:
+        // internal data
+        std::set< OUString >    maDirs;
+        std::set< std::pair< OUString, OUString > > maFiles;
+
+        sal_uInt16              mnNumBackups;
+        sal_uInt16              mnMode;
+
+        bool                    mbActive;
+        bool                    mbExtensions;
+        bool                    mbCompress;
+
+        // internal flag if _exit() was called already - a hint to evtl.
+        // not create copies of potentially not well-defined data. This
+        // may be used in destructors of static instances - which unfortunately
+        // get called on WNT but not on linux. Thus I thought about encapsulating
+        // in some '#ifdefs', but it's just more safe to always do it and
+        // allows to add a SAL_WARN when one of these destructors is called
+        // after _exit()
+        static bool         mbExitWasCalled;
+
+        // internal detector if SafeModeName dir exists
+        static bool         mbSafeModeDirExists;
+
+        // internal upper limit (max) of allowed backups
+        static sal_uInt16   mnMaxAllowedBackups;
+
+        // path to User's configuration directory and derived strings
+        static OUString     maInitialBaseURL;
+        static OUString     maUserConfigBaseURL;
+        static OUString     maUserConfigWorkURL;
+        static OUString     maRegModName;
+        static OUString     maExt;
+
+        // get path to User's configuration directory (created on-demand)
+        static const OUString& getInitialBaseURL();
+
+        // the name of the SafeMode directory for temporary processing
+        static const OUString& getSafeModeName();
+
+    public:
+        /** Constructor to handle Backups of the given file, will internally
+         *  detect configuration values and URL to initial registrymodifications
+         *  and thus the User configuration directory
+         */
+        BackupFileHelper();
+
+        // allow to set static global flag when app had to call _exit()
+        static void setExitWasCalled();
+        static bool getExitWasCalled();
+
+        // This call initializes the state of the UserDirectory as needed, it may
+        // initialize to SafeMode configuration or return from it by moving files
+        // in that directory
+        static void reactOnSafeMode(bool bSafeMode);
+
+        /** tries to create a new backup, if there is none yet, or if the
+         *  last differs from the base file. It will then put a new version
+         *  on the 'stack' of copies and evtl. delete the oldest backup.
+         *  Also may cleanup older backups when NumBackups given in the
+         *  constructor has changed.
+         *
+         * tryPushExtensionInfo is the specialized version for ExtensionInfo
+         */
+        void tryPush();
+        void tryPushExtensionInfo();
+
+        /** finds out if a restore is possible
+         *
+         *  @return bool
+         *          returns true if a restore to an older backup is possible
+         *
+         * isPopPossibleExtensionInfo is the specialized version for ExtensionInfo
+         */
+        bool isPopPossible();
+        bool isPopPossibleExtensionInfo() const;
+
+        /** tries to execute a restore. Will overwrite the base file
+         *  in that case and take one version off the 'stack' of copies.
+         *  Also may cleanup older backups when NumBackups given in the
+         *  constructor has changed.
+         *
+         * tryPopExtensionInfo is the specialized version for ExtensionInfo
+         */
+        void tryPop();
+        void tryPopExtensionInfo();
+
+        /** tries to iterate the extensions and to disable all of them
+        */
+        static bool isTryDisableAllExtensionsPossible();
+        static void tryDisableAllExtensions();
+
+        /** Deinstall all User Extensions (installed for User only)
+        */
+        static bool isTryDeinstallUserExtensionsPossible();
+        static void tryDeinstallUserExtensions();
+
+        /** Reset shared Extensions
+        */
+        static bool isTryResetSharedExtensionsPossible();
+        static void tryResetSharedExtensions();
+
+        /** Reset bundled Extensions
+        */
+        static bool isTryResetBundledExtensionsPossible();
+        static void tryResetBundledExtensions();
+
+        /// Disables OpenGL and OpenCL
+        static void tryDisableHWAcceleration();
+
+        /** resets User-Customizations like Settings and UserInterface modifications
+        */
+        static bool isTryResetCustomizationsPossible();
+        static void tryResetCustomizations();
+
+        /** resets the whole UserProfile
+        */
+        static void tryResetUserProfile();
+
+        /** Return the profile url */
+        static const OUString& getUserProfileURL();
+
+        /** Return the url of the backed up profile (when in safe mode) */
+        static const OUString& getUserProfileWorkURL();
+
+    private:
+        // internal helper methods
+        static OUString getPackURL();
+        static const std::vector< OUString >& getCustomizationDirNames();
+        static const std::vector< OUString >& getCustomizationFileNames();
+
+        // file push helpers
+        bool tryPush_Files(const std::set< OUString >& rDirs, const std::set< std::pair< OUString, OUString > >& rFiles, std::u16string_view rSourceURL, const OUString& rTargetURL);
+        bool tryPush_file(std::u16string_view rSourceURL, std::u16string_view rTargetURL, std::u16string_view rName, std::u16string_view rExt);
+
+        // file pop possibilities helper
+        bool isPopPossible_files(const std::set< OUString >& rDirs, const std::set< std::pair< OUString, OUString > >& rFiles, std::u16string_view rSourceURL, std::u16string_view rTargetURL);
+        static bool isPopPossible_file(std::u16string_view rSourceURL, std::u16string_view rTargetURL, std::u16string_view rName, std::u16string_view rExt);
+
+        // file pop helpers
+        bool tryPop_files(const std::set< OUString >& rDirs, const std::set< std::pair< OUString, OUString > >& rFiles, std::u16string_view rSourceURL, const OUString& rTargetURL);
+        bool tryPop_file(std::u16string_view rSourceURL, std::u16string_view rTargetURL, std::u16string_view rName, std::u16string_view rExt);
+
+        // ExtensionInfo helpers
+        bool tryPush_extensionInfo(std::u16string_view rTargetURL);
+        static bool isPopPossible_extensionInfo(std::u16string_view rTargetURL);
+        bool tryPop_extensionInfo(std::u16string_view rTargetURL);
+
+        // FileDirInfo helpers
+        void fillDirFileInfo();
+    };
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/base64.hxx b/include/comphelper/base64.hxx
new file mode 100644
index 000000000..78a0bacb5
--- /dev/null
+++ b/include/comphelper/base64.hxx
@@ -0,0 +1,62 @@
+/* -*- 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_COMPHELPER_BASE64_HXX
+#define INCLUDED_COMPHELPER_BASE64_HXX
+
+#include <sal/config.h>
+
+#include <cstddef>
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <sal/types.h>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/strbuf.hxx>
+
+namespace com::sun::star::uno
+{
+template <class E> class Sequence;
+}
+
+namespace comphelper
+{
+class COMPHELPER_DLLPUBLIC Base64
+{
+public:
+    /** encodes the given byte sequence into Base64 */
+    static void encode(OUStringBuffer& aStrBuffer, const css::uno::Sequence<sal_Int8>& aPass);
+
+    static void encode(OStringBuffer& aStrBuffer, const css::uno::Sequence<sal_Int8>& aPass);
+
+    // Decode a base 64 encoded string into a sequence of bytes. The first
+    // version can be used for attribute values only, because it does not
+    // return any chars left from conversion.
+    // For text submitted through the SAX characters call, the later method
+    // must be used!
+    static void decode(css::uno::Sequence<sal_Int8>& aPass, std::u16string_view sBuffer);
+
+    static std::size_t decodeSomeChars(css::uno::Sequence<sal_Int8>& aPass,
+                                       std::u16string_view sBuffer);
+};
+}
+
+#endif // INCLUDED_COMPHELPER_BASE64_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/basicio.hxx b/include/comphelper/basicio.hxx
new file mode 100644
index 000000000..62260e3da
--- /dev/null
+++ b/include/comphelper/basicio.hxx
@@ -0,0 +1,88 @@
+/* -*- 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_COMPHELPER_BASICIO_HXX
+#define INCLUDED_COMPHELPER_BASICIO_HXX
+
+#include <com/sun/star/io/XObjectOutputStream.hpp>
+#include <com/sun/star/io/XObjectInputStream.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::awt { struct FontDescriptor; }
+
+namespace comphelper
+{
+
+// bool
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& _rxInStream, bool& _rVal);
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& _rxOutStream, bool _bVal);
+void operator <<(
+    css::uno::Reference<css::io::XObjectOutputStream> const &, sal_Bool)
+    = delete;
+
+// OUString
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& _rxInStream, OUString& _rStr);
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& _rxOutStream, const OUString& _rStr);
+
+// sal_Int16
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& _rxInStream, sal_Int16& _rValue);
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& _rxOutStream, sal_Int16 _nValue);
+
+// sal_uInt16
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& _rxInStream, sal_uInt16& _rValue);
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& _rxOutStream, sal_uInt16 _nValue);
+
+// sal_uInt32
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& _rxInStream, sal_uInt32& _rValue);
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& _rxOutStream, sal_uInt32 _nValue);
+
+// sal_Int16
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& _rxInStream, sal_Int32& _rValue);
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& _rxOutStream, sal_Int32 _nValue);
+
+// FontDescriptor
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& InStream, css::awt::FontDescriptor& rVal);
+COMPHELPER_DLLPUBLIC const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& OutStream, const css::awt::FontDescriptor& rVal);
+
+// sequences
+template <class ELEMENT>
+const css::uno::Reference<css::io::XObjectInputStream>& operator >> (const css::uno::Reference<css::io::XObjectInputStream>& _rxInStream, css::uno::Sequence<ELEMENT>& _rSeq)
+{
+    _rSeq.realloc(_rxInStream->readLong());
+    for (ELEMENT& rElement : asNonConstRange(_rSeq))
+        _rxInStream >> rElement;
+    return _rxInStream;
+}
+
+template <class ELEMENT>
+const css::uno::Reference<css::io::XObjectOutputStream>& operator << (const css::uno::Reference<css::io::XObjectOutputStream>& _rxOutStream, const css::uno::Sequence<ELEMENT>& _rSeq)
+{
+    _rxOutStream->writeLong(_rSeq.getLength());
+    for (const ELEMENT& rElement : _rSeq)
+        _rxOutStream << rElement;
+    return _rxOutStream;
+}
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_BASICIO_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/broadcasthelper.hxx b/include/comphelper/broadcasthelper.hxx
new file mode 100644
index 000000000..65fa6d315
--- /dev/null
+++ b/include/comphelper/broadcasthelper.hxx
@@ -0,0 +1,51 @@
+/* -*- 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_COMPHELPER_BROADCASTHELPER_HXX
+#define INCLUDED_COMPHELPER_BROADCASTHELPER_HXX
+
+#include <osl/mutex.hxx>
+#include <cppuhelper/interfacecontainer.h>
+
+namespace comphelper
+{
+    // OMutexAndBroadcastHelper - a class which holds a Mutex and an OBroadcastHelper;
+    //                 needed because when deriving from OPropertySetHelper,
+    //                 the OBroadcastHelper has to be initialized before
+    //                 the OPropertySetHelper
+
+    class OMutexAndBroadcastHelper
+    {
+    protected:
+        ::osl::Mutex                m_aMutex;
+        ::cppu::OBroadcastHelper    m_aBHelper;
+
+    public:
+        OMutexAndBroadcastHelper() : m_aBHelper( m_aMutex ) { }
+
+        ::osl::Mutex&                   GetMutex()                  { return m_aMutex; }
+        ::cppu::OBroadcastHelper&       GetBroadcastHelper()        { return m_aBHelper; }
+        const ::cppu::OBroadcastHelper& GetBroadcastHelper() const  { return m_aBHelper; }
+
+    };
+}
+
+#endif // INCLUDED_COMPHELPER_BROADCASTHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/bytereader.hxx b/include/comphelper/bytereader.hxx
new file mode 100644
index 000000000..a7e899098
--- /dev/null
+++ b/include/comphelper/bytereader.hxx
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+#pragma once
+
+#include <comphelper/comphelperdllapi.h>
+#include <com/sun/star/uno/Sequence.hxx>
+
+namespace comphelper
+{
+/**
+ * Interface that we can cast to, to bypass the inefficiency of using Sequence<sal_Int8>
+ * when reading via XInputStream.
+ */
+class COMPHELPER_DLLPUBLIC ByteReader
+{
+public:
+    virtual ~ByteReader();
+    virtual sal_Int32 readSomeBytes(sal_Int8* aData, sal_Int32 nBytesToRead) = 0;
+
+    static const css::uno::Sequence<sal_Int8>& getUnoTunnelId();
+};
+
+/**
+ * Interface that we can cast to, to bypass the inefficiency of using Sequence<sal_Int8>
+ * when writing via XOutputStream.
+ */
+class COMPHELPER_DLLPUBLIC ByteWriter
+{
+public:
+    virtual ~ByteWriter();
+    virtual sal_Int32 writeSomeBytes(const sal_Int8* aData, sal_Int32 nBytesToWrite) = 0;
+
+    static const css::uno::Sequence<sal_Int8>& getUnoTunnelId();
+};
+
+} // namespace utl
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/include/comphelper/classids.hxx b/include/comphelper/classids.hxx
new file mode 100644
index 000000000..4c345b84b
--- /dev/null
+++ b/include/comphelper/classids.hxx
@@ -0,0 +1,334 @@
+/* -*- 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_COMPHELPER_CLASSIDS_HXX
+#define INCLUDED_COMPHELPER_CLASSIDS_HXX
+
+/*
+ * StarWriter
+ */
+
+/* 3.0 */
+
+#define SO3_SW_CLASSID_30 \
+    0xDC5C7E40L, 0xB35C, 0x101B, 0x99, 0x61, 0x04, \
+    0x02, 0x1C, 0x00, 0x70, 0x02
+
+/* 4.0 */
+
+#define SO3_SW_CLASSID_40 \
+    0x8b04e9b0,  0x420e, 0x11d0, 0xa4, 0x5e, 0x0, \
+    0xa0, 0x24, 0x9d, 0x57, 0xb1
+
+/* 5.0 */
+
+#define SO3_SW_CLASSID_50 \
+    0xc20cf9d1, 0x85ae, 0x11d1, 0xaa, 0xb4, 0x0, \
+    0x60, 0x97, 0xda, 0x56, 0x1a
+
+ /* 6.0, 7, 8 */
+
+#define SO3_SW_CLASSID_60 \
+    0x8BC6B165, 0xB1B2, 0x4EDD, 0xAA, 0x47, 0xDA, \
+    0xE2, 0xEE, 0x68, 0x9D, 0xD6
+
+ /* ole embed 6.0, 7 */
+
+#define SO3_SW_OLE_EMBED_CLASSID_60 \
+    0x30a2652a, 0xddf7, 0x45e7, 0xac, 0xa6, 0x3e, \
+    0xab, 0x26, 0xfc, 0x8a, 0x4e
+
+ /* ole embed 8 */
+
+#define SO3_SW_OLE_EMBED_CLASSID_8 \
+    0xf616b81f, 0x7bb8, 0x4f22, 0xb8, 0xa5, 0x47, \
+    0x42, 0x8d, 0x59, 0xf8, 0xad
+
+/* current */
+
+#define SO3_SW_CLASSID SO3_SW_CLASSID_60
+
+/*
+ * StarWriter/Web
+ */
+
+/* 6.0, 7, 8 */
+
+#define SO3_SWWEB_CLASSID_60 \
+    0xA8BBA60C, 0x7C60, 0x4550, 0x91, 0xCE, 0x39, \
+    0xC3, 0x90, 0x3F, 0xAC, 0x5E
+
+/* current */
+
+#define SO3_SWWEB_CLASSID SO3_SWWEB_CLASSID_60
+
+/*
+ * Globaldokument
+ */
+
+/* 6.0, 7, 8 */
+
+#define SO3_SWGLOB_CLASSID_60 \
+    0xB21A0A7C, 0xE403, 0x41FE, 0x95, 0x62, 0xBD, \
+    0x13, 0xEA, 0x6F, 0x15, 0xA0
+
+/* current */
+
+#define SO3_SWGLOB_CLASSID SO3_SWGLOB_CLASSID_60
+
+
+/*
+ * StarCalc
+ */
+
+/* 3.0 */
+
+#define SO3_SC_CLASSID_30 \
+    0x3F543FA0L, 0xB6A6, 0x101B, 0x99, 0x61, 0x04, \
+    0x02, 0x1C, 0x00, 0x70, 0x02
+
+/* 4.0 */
+
+#define SO3_SC_CLASSID_40 \
+    0x6361d441L, 0x4235, 0x11d0, 0x89, 0xcb, 0x00, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 5.0 */
+
+#define SO3_SC_CLASSID_50 \
+    0xc6a5b861L, 0x85d6, 0x11d1, 0x89, 0xcb, 0x00, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 6.0 */
+
+#define SO3_SC_CLASSID_60 \
+    0x47BBB4CB, 0xCE4C, 0x4E80, 0xA5, 0x91, 0x42, \
+    0xD9, 0xAE, 0x74, 0x95, 0x0F
+
+/* ole embed 6.0, 7 */
+
+#define SO3_SC_OLE_EMBED_CLASSID_60 \
+    0x7b342dc4, 0x139a, 0x4a46, 0x8a, 0x93, 0xdb, \
+    0x8, 0x27, 0xcc, 0xee, 0x9c
+
+/* ole embed 8 */
+
+#define SO3_SC_OLE_EMBED_CLASSID_8 \
+    0x7fa8ae11, 0xb3e3, 0x4d88, 0xaa, 0xbf, 0x25, \
+    0x55, 0x26, 0xcd, 0x1c, 0xe8
+
+/* current */
+
+#define SO3_SC_CLASSID SO3_SC_CLASSID_60
+
+/****************************************************
+* StarImpress
+****************************************************/
+
+/* 3.0 */
+
+#define SO3_SIMPRESS_CLASSID_30 \
+    0xAF10AAE0L, 0xB36D, 0x101B, 0x99, 0x61, 0x04, \
+    0x02, 0x1C, 0x00, 0x70, 0x02
+
+/* 4.0 */
+
+#define SO3_SIMPRESS_CLASSID_40 \
+    0x12d3cc0L, 0x4216, 0x11d0, 0x89, 0xcb, 0x0, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 5.0 */
+
+#define SO3_SIMPRESS_CLASSID_50 \
+    0x565c7221L, 0x85bc, 0x11d1, 0x89, 0xd0, 0x0, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 6.0 */
+
+#define SO3_SIMPRESS_CLASSID_60 \
+    0x9176E48A, 0x637A, 0x4D1F, 0x80, 0x3B, 0x99, \
+    0xD9, 0xBF, 0xAC, 0x10, 0x47
+
+/* ole embed 6.0, 7 */
+
+#define SO3_SIMPRESS_OLE_EMBED_CLASSID_60 \
+    0xe5a0b632, 0xdfba, 0x4549, 0x93, 0x46, 0xe4, \
+    0x14, 0xda, 0x6, 0xe6, 0xf8
+
+/* ole embed 8 */
+
+#define SO3_SIMPRESS_OLE_EMBED_CLASSID_8 \
+    0xee5d1ea4, 0xd445, 0x4289, 0xb2, 0xfc, 0x55, \
+    0xfc, 0x93, 0x69, 0x39, 0x17
+
+/* current */
+
+#define SO3_SIMPRESS_CLASSID  SO3_SIMPRESS_CLASSID_60
+
+/****************************************************
+* StarDraw
+****************************************************/
+
+/* 5.0 */
+
+#define SO3_SDRAW_CLASSID_50 \
+    0x2e8905a0L, 0x85bd, 0x11d1, 0x89, 0xd0, 0x0, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 6.0 */
+#define SO3_SDRAW_CLASSID_60 \
+    0x4BAB8970, 0x8A3B, 0x45B3, 0x99, 0x1C, 0xCB, \
+    0xEE, 0xAC, 0x6B, 0xD5, 0xE3
+
+/* ole embed 6.0, 7 */
+
+#define SO3_SDRAW_OLE_EMBED_CLASSID_60 \
+    0x41662fc2, 0xd57, 0x4aff, 0xab, 0x27, 0xad, \
+    0x2e, 0x12, 0xe7, 0xc2, 0x73
+
+/* ole embed 8 */
+
+#define SO3_SDRAW_OLE_EMBED_CLASSID_8 \
+    0x448bb771, 0xcfe2, 0x47c4, 0xbc, 0xdf, 0x1f, \
+    0xbf, 0x37, 0x8e, 0x20, 0x2c
+
+/* current */
+
+#define SO3_SDRAW_CLASSID  SO3_SDRAW_CLASSID_60
+
+/****************************************************
+* StarChart
+****************************************************/
+
+/* 3.0 */
+
+#define SO3_SCH_CLASSID_30 \
+    0xFB9C99E0L, 0x2C6D, 0x101C, 0x8E, 0x2C, 0x00, \
+    0x00, 0x1B, 0x4C, 0xC7, 0x11
+
+/* 4.0 */
+
+#define SO3_SCH_CLASSID_40 \
+    0x2b3b7e0L, 0x4225, 0x11d0, 0x89, 0xca, 0x00, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 5.0 */
+
+#define SO3_SCH_CLASSID_50 \
+    0xbf884321L, 0x85dd, 0x11d1, 0x89, 0xd0, 0x00, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 6.0 */
+
+#define SO3_SCH_CLASSID_60 \
+    0x12DCAE26, 0x281F, 0x416F, 0xA2, 0x34, 0xC3, \
+    0x08, 0x61, 0x27, 0x38, 0x2E
+
+/* ole embed 6.0, 7 */
+
+#define SO3_SCH_OLE_EMBED_CLASSID_60 \
+    0xd415cd93, 0x35c4, 0x4c6f, 0x81, 0x9d, 0xa6, \
+    0x64, 0xa1, 0xc8, 0x13, 0xae
+
+/* ole embed 8 */
+
+#define SO3_SCH_OLE_EMBED_CLASSID_8 \
+    0xdd0a57f, 0xcf3b, 0x4fd2, 0xbd, 0xa4, 0x94, \
+    0x42, 0x71, 0x9b, 0x2a, 0x73
+
+/* current */
+
+#define SO3_SCH_CLASSID  SO3_SCH_CLASSID_60
+
+// Report chart
+
+#define SO3_RPTCH_CLASSID \
+    0x80243D39, 0x6741, 0x46C5, 0x92, 0x6E, 0x06, \
+    0x91, 0x64, 0xFF, 0x87, 0xBB
+
+/***************************************************
+* StarMath
+***************************************************/
+
+/* 3.0 */
+
+#define SO3_SM_CLASSID_30 \
+    0xD4590460L, 0x35FD, 0x101C, 0xB1, 0x2A, 0x04, \
+    0x02, 0x1C, 0x00, 0x70, 0x02
+
+/* 4.0 */
+
+#define SO3_SM_CLASSID_40 \
+    0x2b3b7e1L, 0x4225, 0x11d0, 0x89, 0xca, 0x00, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 5.0 */
+
+#define SO3_SM_CLASSID_50 \
+    0xffb5e640L, 0x85de, 0x11d1, 0x89, 0xd0, 0x00, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+/* 6.0, 7, 8 */
+
+#define SO3_SM_CLASSID_60 \
+    0x078B7ABA, 0x54FC, 0x457F, 0x85, 0x51, 0x61, \
+    0x47, 0xE7, 0x76, 0xA9, 0x97
+
+/* ole embed 6.0, 7 */
+
+#define SO3_SM_OLE_EMBED_CLASSID_60 \
+    0xd0484de6, 0xaaee, 0x468a, 0x99, 0x1f, 0x8d, \
+    0x4b, 0x7, 0x37, 0xb5, 0x7a
+
+/* ole embed 8 */
+
+#define SO3_SM_OLE_EMBED_CLASSID_8 \
+    0xd2d59cd1, 0xa6a, 0x4d36, 0xae, 0x20, 0x47, \
+    0x81, 0x70, 0x77, 0xd5, 0x7c
+
+/* current */
+
+#define SO3_SM_CLASSID  SO3_SM_CLASSID_60
+
+#define SO3_OUT_CLASSID \
+    0x970b1e82, 0xcf2d, 0x11cf, 0x89, 0xca, 0x00, \
+    0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+#define SO3_DUMMY_CLASSID \
+    0x970b1fff, 0xcf2d, 0x11cf, \
+    0x89,0xca,0x00,0x80,0x29,0xe4,0xb0,0xb1
+
+#define SO3_APPLET_CLASSID \
+    0x970b1e81, 0xcf2d, 0x11cf, \
+    0x89,0xca,0x00,0x80,0x29,0xe4,0xb0,0xb1
+
+#define SO3_PLUGIN_CLASSID \
+    0x4caa7761, 0x6b8b, 0x11cf, \
+    0x89,0xca,0x0,0x80,0x29,0xe4,0xb0,0xb1
+
+#define SO3_IFRAME_CLASSID \
+    0x1a8a6701, 0xde58, 0x11cf, \
+    0x89, 0xca, 0x0, 0x80, 0x29, 0xe4, 0xb0, 0xb1
+
+#define SO3_RPT_CLASSID_90 \
+    0xd7896d52, 0xb7af, 0x4820, \
+    0x9d, 0xfe, 0xd4, 0x04, 0xd0, 0x15, 0x96, 0x0f
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/compbase.hxx b/include/comphelper/compbase.hxx
new file mode 100644
index 000000000..38380ede2
--- /dev/null
+++ b/include/comphelper/compbase.hxx
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/interfacecontainer4.hxx>
+#include <cppuhelper/weak.hxx>
+#include <cppuhelper/queryinterface.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/lang/XTypeProvider.hpp>
+#include <mutex>
+
+namespace comphelper
+{
+/**
+    Serves two purposes
+    (1) extracts code that doesn't need to be templated
+    (2) helps to handle the custom where we have conflicting interfaces
+        e.g. multiple UNO interfaces that extend css::lang::XComponent
+*/
+class COMPHELPER_DLLPUBLIC WeakComponentImplHelperBase : public cppu::OWeakObject,
+                                                         public css::lang::XComponent
+{
+public:
+    virtual ~WeakComponentImplHelperBase() override;
+
+    // css::lang::XComponent
+    virtual void SAL_CALL dispose() override;
+    virtual void SAL_CALL
+    addEventListener(css::uno::Reference<css::lang::XEventListener> const& rxListener) override;
+    virtual void SAL_CALL
+    removeEventListener(css::uno::Reference<css::lang::XEventListener> const& rxListener) override;
+
+    virtual css::uno::Any SAL_CALL queryInterface(css::uno::Type const& rType) override;
+
+    /**
+        Called by dispose for subclasses to do dispose() work.
+        The mutex is held when called, and subclasses can unlock() the guard if necessary.
+     */
+    virtual void disposing(std::unique_lock<std::mutex>&);
+
+protected:
+    comphelper::OInterfaceContainerHelper4<css::lang::XEventListener> maEventListeners;
+    mutable std::mutex m_aMutex;
+    bool m_bDisposed = false;
+};
+
+template <typename... Ifc>
+class SAL_DLLPUBLIC_TEMPLATE WeakComponentImplHelper : public WeakComponentImplHelperBase,
+                                                       public css::lang::XTypeProvider,
+                                                       public Ifc...
+{
+public:
+    virtual void SAL_CALL acquire() noexcept final override { OWeakObject::acquire(); }
+
+    virtual void SAL_CALL release() noexcept final override { OWeakObject::release(); }
+
+    // css::lang::XComponent
+    virtual void SAL_CALL dispose() noexcept final override
+    {
+        WeakComponentImplHelperBase::dispose();
+    }
+    virtual void SAL_CALL addEventListener(
+        css::uno::Reference<css::lang::XEventListener> const& rxListener) final override
+    {
+        WeakComponentImplHelperBase::addEventListener(rxListener);
+    }
+    virtual void SAL_CALL removeEventListener(
+        css::uno::Reference<css::lang::XEventListener> const& rxListener) final override
+    {
+        WeakComponentImplHelperBase::removeEventListener(rxListener);
+    }
+
+    virtual css::uno::Any SAL_CALL queryInterface(css::uno::Type const& rType) override
+    {
+        return WeakComponentImplHelper_query(rType, class_data_get(), this);
+    }
+
+    // css::lang::XTypeProvider
+    virtual css::uno::Sequence<css::uno::Type> SAL_CALL getTypes() override
+    {
+        static const css::uno::Sequence<css::uno::Type> aTypeList{
+            cppu::UnoType<css::uno::XWeak>::get(), cppu::UnoType<css::lang::XComponent>::get(),
+            cppu::UnoType<css::lang::XTypeProvider>::get(), cppu::UnoType<Ifc>::get()...
+        };
+        return aTypeList;
+    }
+    virtual css::uno::Sequence<sal_Int8> SAL_CALL getImplementationId() override
+    {
+        return css::uno::Sequence<sal_Int8>();
+    }
+
+private:
+    static cppu::class_data* class_data_get()
+    {
+        return cppu::detail::ImplClassData<WeakComponentImplHelper, Ifc...>{}();
+    }
+};
+
+/** WeakComponentImplHelper
+*/
+COMPHELPER_DLLPUBLIC css::uno::Any
+WeakComponentImplHelper_query(css::uno::Type const& rType, cppu::class_data* cd,
+                              WeakComponentImplHelperBase* pBase);
+
+} //  namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/include/comphelper/comphelperdllapi.h b/include/comphelper/comphelperdllapi.h
new file mode 100644
index 000000000..361326a4e
--- /dev/null
+++ b/include/comphelper/comphelperdllapi.h
@@ -0,0 +1,33 @@
+/* -*- 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_COMPHELPER_COMPHELPERDLLAPI_H
+#define INCLUDED_COMPHELPER_COMPHELPERDLLAPI_H
+
+#include <sal/types.h>
+
+#if defined(COMPHELPER_DLLIMPLEMENTATION)
+#define COMPHELPER_DLLPUBLIC SAL_DLLPUBLIC_EXPORT
+#else
+#define COMPHELPER_DLLPUBLIC SAL_DLLPUBLIC_IMPORT
+#endif
+#define COMPHELPER_DLLPRIVATE SAL_DLLPRIVATE
+
+#endif // INCLUDED_COMPHELPER_COMPHELPERDLLAPI_H
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/componentbase.hxx b/include/comphelper/componentbase.hxx
new file mode 100644
index 000000000..ce6353be4
--- /dev/null
+++ b/include/comphelper/componentbase.hxx
@@ -0,0 +1,139 @@
+/* -*- 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_COMPHELPER_COMPONENTBASE_HXX
+#define INCLUDED_COMPHELPER_COMPONENTBASE_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <cppuhelper/interfacecontainer.h>
+
+
+namespace comphelper
+{
+
+
+    //= ComponentBase
+
+    class COMPHELPER_DLLPUBLIC ComponentBase
+    {
+    protected:
+        /** creates a ComponentBase instance
+
+            The instance is not initialized. As a consequence, every ComponentMethodGuard instantiated for
+            this component will throw a css::lang::NotInitializedException,
+            until ->setInitialized() is called.
+        */
+        ComponentBase( ::cppu::OBroadcastHelper& _rBHelper )
+            :m_rBHelper( _rBHelper )
+            ,m_bInitialized( false )
+        {
+        }
+
+        struct NoInitializationNeeded { };
+
+        /** creates a ComponentBase instance
+
+            The instance is already initialized, so there's no need to call setInitialized later on. Use this
+            constructor for component implementations which do not require explicit initialization.
+        */
+        ComponentBase( ::cppu::OBroadcastHelper& _rBHelper, NoInitializationNeeded )
+            :m_rBHelper( _rBHelper )
+            ,m_bInitialized( true )
+        {
+        }
+
+        ~ComponentBase() COVERITY_NOEXCEPT_FALSE {}
+
+        /** marks the instance as initialized
+
+            Subsequent instantiations of a ComponentMethodGuard won't throw the NotInitializedException now.
+        */
+        void setInitialized()    { m_bInitialized = true; }
+
+    public:
+        /// helper struct to grant access to selected public methods to the ComponentMethodGuard class
+        struct GuardAccess { friend class ComponentMethodGuard; private: GuardAccess() { } };
+
+        /// retrieves the component's mutex
+        ::osl::Mutex&   getMutex( GuardAccess )                 { return getMutex(); }
+        /// checks whether the component is already disposed, throws a DisposedException if so.
+        void                    checkDisposed( GuardAccess ) const;
+        /// checks whether the component is already initialized, throws a NotInitializedException if not.
+        void                    checkInitialized( GuardAccess ) const;
+
+    protected:
+        /// retrieves the component's broadcast helper
+        ::cppu::OBroadcastHelper&   getBroadcastHelper()    { return m_rBHelper; }
+        /// retrieves the component's mutex
+        ::osl::Mutex&               getMutex()              { return m_rBHelper.rMutex; }
+        /// determines whether the instance is already disposed
+        bool                        impl_isDisposed() const { return m_rBHelper.bDisposed; }
+
+        /// determines whether the component is already initialized
+        bool
+                impl_isInitialized_nothrow() const { return m_bInitialized; }
+
+        /** returns the context to be used when throwing exceptions
+
+            The default implementation returns <NULL/>.
+        */
+        static css::uno::Reference< css::uno::XInterface >
+                getComponent();
+
+    private:
+        ::cppu::OBroadcastHelper&   m_rBHelper;
+        bool                        m_bInitialized;
+    };
+
+    class ComponentMethodGuard
+    {
+    public:
+        enum class MethodType
+        {
+            /// allow the method to be called only when being initialized and not being disposed
+            Default,
+            /// allow the method to be called without being initialized
+            WithoutInit
+
+        };
+
+        ComponentMethodGuard( ComponentBase& _rComponent, const MethodType _eType = MethodType::Default )
+            :m_aMutexGuard( _rComponent.getMutex( ComponentBase::GuardAccess() ) )
+        {
+            if ( _eType != MethodType::WithoutInit )
+                _rComponent.checkInitialized( ComponentBase::GuardAccess() );
+            _rComponent.checkDisposed( ComponentBase::GuardAccess() );
+        }
+
+        void clear()
+        {
+            m_aMutexGuard.clear();
+        }
+
+    private:
+        osl::ClearableMutexGuard m_aMutexGuard;
+    };
+
+
+} // namespace ComponentBase
+
+
+#endif // INCLUDED_COMPHELPER_COMPONENTBASE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/componentguard.hxx b/include/comphelper/componentguard.hxx
new file mode 100644
index 000000000..f3cf1bd5e
--- /dev/null
+++ b/include/comphelper/componentguard.hxx
@@ -0,0 +1,58 @@
+/* -*- 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_COMPHELPER_COMPONENTGUARD_HXX
+#define INCLUDED_COMPHELPER_COMPONENTGUARD_HXX
+
+#include <com/sun/star/lang/DisposedException.hpp>
+
+#include <cppuhelper/weak.hxx>
+#include <cppuhelper/interfacecontainer.h>
+
+
+namespace comphelper
+{
+
+
+    //= ComponentGuard
+
+    class ComponentGuard
+    {
+    public:
+        ComponentGuard( ::cppu::OWeakObject& i_component, ::cppu::OBroadcastHelper & i_broadcastHelper )
+            :m_aGuard( i_broadcastHelper.rMutex )
+        {
+            if ( i_broadcastHelper.bDisposed )
+                throw css::lang::DisposedException( OUString(), &i_component );
+        }
+
+        void clear()    { m_aGuard.clear(); }
+        void reset()    { m_aGuard.reset(); }
+
+    private:
+        ::osl::ResettableMutexGuard m_aGuard;
+    };
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_COMPONENTGUARD_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/configuration.hxx b/include/comphelper/configuration.hxx
new file mode 100644
index 000000000..222b9d5af
--- /dev/null
+++ b/include/comphelper/configuration.hxx
@@ -0,0 +1,342 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_CONFIGURATION_HXX
+#define INCLUDED_COMPHELPER_CONFIGURATION_HXX
+
+#include <sal/config.h>
+
+#include <optional>
+#include <string_view>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Reference.h>
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/processfactory.hxx>
+#include <sal/types.h>
+#include <memory>
+
+namespace com::sun::star {
+    namespace configuration { class XReadWriteAccess; }
+    namespace container {
+        class XHierarchicalNameAccess;
+        class XHierarchicalNameReplace;
+        class XNameAccess;
+        class XNameContainer;
+    }
+    namespace uno { class XComponentContext; }
+}
+
+namespace comphelper {
+
+namespace detail { class ConfigurationWrapper; }
+
+/// A batch of configuration changes that is committed as a whole.
+///
+/// Client code needs to call commit explicitly; otherwise the changes are lost
+/// when the instance is destroyed.
+///
+/// This is the only class from this header file that client code should use
+/// directly.
+class COMPHELPER_DLLPUBLIC ConfigurationChanges {
+public:
+    static std::shared_ptr<ConfigurationChanges> create();
+
+    ~ConfigurationChanges();
+
+    void commit() const;
+
+private:
+    ConfigurationChanges(const ConfigurationChanges&) = delete;
+    ConfigurationChanges& operator=(const ConfigurationChanges&) = delete;
+
+    SAL_DLLPRIVATE ConfigurationChanges(
+        css::uno::Reference< css::uno::XComponentContext >
+            const & context);
+
+    SAL_DLLPRIVATE void setPropertyValue(
+        OUString const & path, css::uno::Any const & value)
+        const;
+
+    SAL_DLLPRIVATE css::uno::Reference<
+        css::container::XHierarchicalNameReplace >
+    getGroup(OUString const & path) const;
+
+    SAL_DLLPRIVATE
+    css::uno::Reference< css::container::XNameContainer >
+    getSet(OUString const & path) const;
+
+    css::uno::Reference<
+        css::configuration::XReadWriteAccess > access_;
+
+    friend class detail::ConfigurationWrapper;
+};
+
+namespace detail {
+
+/// @internal
+class COMPHELPER_DLLPUBLIC ConfigurationWrapper {
+public:
+    static ConfigurationWrapper const & get();
+
+    bool isReadOnly(OUString const & path) const;
+
+    css::uno::Any getPropertyValue(std::u16string_view path) const;
+
+    static void setPropertyValue(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path, css::uno::Any const & value);
+
+    css::uno::Any getLocalizedPropertyValue(
+        std::u16string_view path) const;
+
+    static void setLocalizedPropertyValue(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path, css::uno::Any const & value);
+
+    css::uno::Reference<
+        css::container::XHierarchicalNameAccess >
+    getGroupReadOnly(OUString const & path) const;
+
+    static css::uno::Reference<
+        css::container::XHierarchicalNameReplace >
+    getGroupReadWrite(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path);
+
+    css::uno::Reference< css::container::XNameAccess >
+    getSetReadOnly(OUString const & path) const;
+
+    static css::uno::Reference< css::container::XNameContainer >
+    getSetReadWrite(
+        std::shared_ptr< ConfigurationChanges > const & batch,
+        OUString const & path);
+
+    std::shared_ptr< ConfigurationChanges > createChanges() const;
+
+private:
+    SAL_DLLPRIVATE explicit ConfigurationWrapper();
+
+    SAL_DLLPRIVATE ~ConfigurationWrapper();
+
+    ConfigurationWrapper(const ConfigurationWrapper&) = delete;
+    ConfigurationWrapper& operator=(const ConfigurationWrapper&) = delete;
+
+    css::uno::Reference< css::uno::XComponentContext >          context_;
+
+    css::uno::Reference< css::configuration::XReadWriteAccess > access_;
+        // should really be a css.configuration.ReadOnlyAccess (with added
+        // css.beans.XHierarchicalPropertySetInfo), but then
+        // configmgr::Access::asProperty() would report all properties as
+        // READONLY, so isReadOnly() would not work
+};
+
+/// @internal
+template< typename T > struct Convert {
+    static css::uno::Any toAny(T const & value)
+    { return css::uno::Any(value); }
+
+    static T fromAny(css::uno::Any const & value)
+    { return value.get< T >(); }
+
+private:
+    Convert(const Convert&) = delete;
+    Convert& operator=(const Convert&) = delete;
+
+    Convert() = delete;
+    ~Convert() = delete;
+};
+
+/// @internal
+template< typename T > struct Convert< std::optional< T > >
+{
+    static css::uno::Any toAny(std::optional< T > const & value) {
+        return value
+            ? css::uno::Any(*value)
+            : css::uno::Any();
+    }
+
+    static std::optional< T > fromAny(css::uno::Any const & value)
+    {
+        return value.hasValue()
+            ? std::optional< T >(value.get< T >()) : std::optional< T >();
+    }
+
+private:
+    Convert(const Convert&) = delete;
+    Convert& operator=(const Convert&) = delete;
+
+    Convert() = delete;
+    ~Convert() = delete;
+};
+
+}
+
+/// A type-safe wrapper around a (non-localized) configuration property.
+///
+/// Automatically generated headers for the various configuration properties
+/// derive from this template and make available its member functions to access
+/// each given configuration property.
+template< typename T, typename U > struct ConfigurationProperty
+{
+    /// Get the read-only status of the given (non-localized) configuration
+    /// property.
+    static bool isReadOnly()
+    {
+        return detail::ConfigurationWrapper::get().isReadOnly(T::path());
+    }
+
+    /// Get the value of the given (non-localized) configuration property.
+    ///
+    /// For nillable properties, U is of type std::optional<U'>.
+    static U get()
+    {
+        // Folding this into one statement causes a bogus error at least with
+        // Red Hat GCC 4.6.2-1:
+        css::uno::Any a(
+            detail::ConfigurationWrapper::get().getPropertyValue(
+                T::path()));
+        return detail::Convert< U >::fromAny(a);
+    }
+
+    /// Set the value of the given (non-localized) configuration property, via a
+    /// given changes batch.
+    ///
+    /// For nillable properties, U is of type std::optional<U'>.
+    static void set(
+        U const & value,
+        std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        comphelper::detail::ConfigurationWrapper::setPropertyValue(
+            batch, T::path(), detail::Convert< U >::toAny(value));
+    }
+
+private:
+    ConfigurationProperty(const ConfigurationProperty&) = delete;
+    ConfigurationProperty& operator=(const ConfigurationProperty&) = delete;
+
+    ConfigurationProperty() = delete;
+    ~ConfigurationProperty() = delete;
+};
+
+/// A type-safe wrapper around a localized configuration property.
+///
+/// Automatically generated headers for the various localized configuration
+/// properties derive from this template and make available its member functions
+/// to access each given localized configuration property.
+template< typename T, typename U > struct ConfigurationLocalizedProperty
+{
+    /// Get the value of the given localized configuration property, for the
+    /// locale currently set at the
+    /// com.sun.star.configuration.theDefaultProvider.
+    ///
+    /// For nillable properties, U is of type std::optional<U'>.
+    static U get()
+    {
+        // Folding this into one statement causes a bogus error at least with
+        // Red Hat GCC 4.6.2-1:
+        css::uno::Any a(
+            detail::ConfigurationWrapper::get().
+            getLocalizedPropertyValue(T::path()));
+        return detail::Convert< U >::fromAny(a);
+    }
+
+    /// Set the value of the given localized configuration property, for the
+    /// locale currently set at the
+    /// com.sun.star.configuration.theDefaultProvider, via a given changes
+    /// batch.
+    ///
+    /// For nillable properties, U is of type std::optional<U'>.
+    static void set(
+        U const & value,
+        std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        comphelper::detail::ConfigurationWrapper::setLocalizedPropertyValue(
+            batch, T::path(), detail::Convert< U >::toAny(value));
+    }
+
+private:
+    ConfigurationLocalizedProperty(const ConfigurationLocalizedProperty&) = delete;
+    ConfigurationLocalizedProperty& operator=(const ConfigurationLocalizedProperty&) = delete;
+
+    ConfigurationLocalizedProperty() = delete;
+    ~ConfigurationLocalizedProperty() = delete;
+};
+
+/// A type-safe wrapper around a configuration group.
+///
+/// Automatically generated headers for the various configuration groups derive
+/// from this template and make available its member functions to access each
+/// given configuration group.
+template< typename T > struct ConfigurationGroup {
+    /// Get read-only access to the given configuration group.
+    static css::uno::Reference<
+        css::container::XHierarchicalNameAccess >
+    get()
+    {
+        return detail::ConfigurationWrapper::get().getGroupReadOnly(
+            T::path());
+    }
+
+    /// Get read/write access to the given configuration group, storing any
+    /// modifications via the given changes batch.
+    static css::uno::Reference<
+        css::container::XHierarchicalNameReplace >
+    get(std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        return comphelper::detail::ConfigurationWrapper::getGroupReadWrite(
+            batch, T::path());
+    }
+
+private:
+    ConfigurationGroup(const ConfigurationGroup&) = delete;
+    ConfigurationGroup& operator=(const ConfigurationGroup&) = delete;
+
+    ConfigurationGroup() = delete;
+    ~ConfigurationGroup() = delete;
+};
+
+/// A type-safe wrapper around a configuration set.
+///
+/// Automatically generated headers for the various configuration sets derive
+/// from this template and make available its member functions to access each
+/// given configuration set.
+template< typename T > struct ConfigurationSet {
+    /// Get read-only access to the given configuration set.
+    static
+    css::uno::Reference< css::container::XNameAccess >
+    get()
+    {
+        return detail::ConfigurationWrapper::get().getSetReadOnly(
+            T::path());
+    }
+
+    /// Get read/write access to the given configuration set, storing any
+    /// modifications via the given changes batch.
+    static
+    css::uno::Reference< css::container::XNameContainer >
+    get(std::shared_ptr< ConfigurationChanges > const & batch)
+    {
+        return comphelper::detail::ConfigurationWrapper::getSetReadWrite(
+            batch, T::path());
+    }
+
+private:
+    ConfigurationSet(const ConfigurationSet&) = delete;
+    ConfigurationSet& operator=(const ConfigurationSet&) = delete;
+
+    ConfigurationSet() = delete;
+    ~ConfigurationSet() = delete;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/configurationhelper.hxx b/include/comphelper/configurationhelper.hxx
new file mode 100644
index 000000000..162319316
--- /dev/null
+++ b/include/comphelper/configurationhelper.hxx
@@ -0,0 +1,239 @@
+/* -*- 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_COMPHELPER_CONFIGURATIONHELPER_HXX
+#define INCLUDED_COMPHELPER_CONFIGURATIONHELPER_HXX
+
+#include <com/sun/star/uno/Reference.h>
+#include <com/sun/star/uno/Any.hxx>
+#include <rtl/ustring.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <o3tl/typed_flags_set.hxx>
+
+namespace com::sun::star::uno { class XComponentContext; }
+namespace com::sun::star::uno { class XInterface; }
+
+namespace comphelper
+{
+    /** specify all possible modes, which can be used to open a configuration access.
+     *
+     *  @see    openConfig()
+     *  @see    readDirectKey()
+     *  @see    writeDirectKey()
+     */
+    enum class EConfigurationModes
+    {
+        /// opens configuration in read/write mode (without LAZY writing!)
+        Standard = 0,
+        /// configuration will be opened readonly
+        ReadOnly = 1,
+        /// all localized nodes will be interpreted as XInterface instead of interpreting it as atomic value nodes
+        AllLocales = 2
+    };
+
+
+}
+
+namespace o3tl
+{
+    template<> struct typed_flags<comphelper::EConfigurationModes> : is_typed_flags<comphelper::EConfigurationModes, 0x3> {};
+}
+
+namespace comphelper
+{
+
+class COMPHELPER_DLLPUBLIC ConfigurationHelper
+{
+public:
+    /** returns access to the specified configuration package.
+     *
+     *  This method should be used, if e.g. more than one request to the same
+     *  configuration package is needed. The configuration access can be cached
+     *  outside and used inbetween.
+     *
+     *  @param  rxContext
+     *          the uno service manager, which should be used to create the
+     *          configuration access.
+     *
+     *  @param  sPackage
+     *          the name of the configuration package.
+     *          e.g. <ul>
+     *                  <li>org.openoffice.Office.Common</li>
+     *                  <li>org.openoffice.Office.Common/Menu</li>
+     *               </ul>
+     *
+     *  @param  eMode
+     *          specify the open mode for the returned configuration access.
+     *          It's interpreted as a flag field and can be any useful combination
+     *          of values of EConfigurationModes.
+     *
+     *  @throw  Any exceptions the underlying configuration can throw.
+     *          E.g. css::uno::Exception if the configuration could not be opened.
+     */
+    static css::uno::Reference< css::uno::XInterface > openConfig(const css::uno::Reference< css::uno::XComponentContext >& rxContext,
+                                                                  const OUString&                                           sPackage,
+                                                                        EConfigurationModes                                 eMode   );
+
+
+    /** reads the value of an existing(!) configuration key,
+     *  which is searched relative to the specified configuration access.
+     *
+     *  This method must be used in combination with openConfig().
+     *  The cached configuration access must be provided here ... and
+     *  all operations are made relative to this access point.
+     *
+     *  @param  xCFG
+     *          the configuration root, where sRelPath should be interpreted.
+     *          as relative path
+     *
+     *  @param  sRelPath
+     *          path relative to xCFG parameter.
+     *
+     *  @param  sKey
+     *          the configuration node, where we should read the value.
+     *
+     *  @return [css.uno.Any]
+     *          the value of sKey.
+     *
+     *  @throw  Any exceptions the underlying configuration can throw.
+     *          E.g. css::container::NoSuchElementException if the specified
+     *          key does not exists.
+     */
+    static css::uno::Any readRelativeKey(const css::uno::Reference< css::uno::XInterface >& xCFG    ,
+                                         const OUString&                            sRelPath,
+                                         const OUString&                            sKey    );
+
+
+    /** writes a new value for an existing(!) configuration key,
+     *  which is searched relative to the specified configuration access.
+     *
+     *  This method must be used in combination with openConfig().
+     *  The cached configuration access must be provided here ... and
+     *  all operations are made relative to this access point.
+     *
+     *  @param  xCFG
+     *          the configuration root, where sRelPath should be interpreted.
+     *          as relative path
+     *
+     *  @param  sRelPath
+     *          path relative to xCFG parameter.
+     *
+     *  @param  sKey
+     *          the configuration node, where we should write the new value.
+     *
+     *  @param  aValue
+     *          the new value for sKey.
+     *
+     *  @throw  Any exceptions the underlying configuration can throw.
+     *          E.g. css::container::NoSuchElementException if the specified
+     *          key does not exists or css::uno::Exception if the provided configuration
+     *          access does not allow writing for this key.
+     */
+    static void writeRelativeKey(const css::uno::Reference< css::uno::XInterface >& xCFG    ,
+                                 const OUString&                            sRelPath,
+                                 const OUString&                            sKey    ,
+                                 const css::uno::Any&                              aValue  );
+
+
+    /** it checks if the specified set node exists ... or create an empty one
+     *  otherwise.
+     *
+     *  This method must be used in combination with openConfig().
+     *  The cached configuration access must be provided here ... and
+     *  all operations are made relative to this access point.
+     *
+     *  Further this method must be used only with configuration set's.
+     *  Atomic keys can't be "created"... they "exist every time".
+     *
+     *  @param  xCFG
+     *          the configuration root, where sRelPathToSet should be interpreted
+     *          as relative path.
+     *
+     *  @param  sRelPathToSet
+     *          path relative to xCFG parameter.
+     *
+     *  @param  sSetNode
+     *          the set node, which should be checked if its exists ...
+     *          or which should be created with default values.
+     *
+     *  @return A reference to the found (or new created) set node.
+     *          Can't be NULL .. in such case an exception occurs!
+     *
+     *  @throw  Any exceptions the underlying configuration can throw.
+     *          E.g. css::uno::Exception if the provided configuration
+     *          access does not allow writing for this set.
+     */
+    static css::uno::Reference< css::uno::XInterface > makeSureSetNodeExists(const css::uno::Reference< css::uno::XInterface >& xCFG         ,
+                                                                             const OUString&                            sRelPathToSet,
+                                                                             const OUString&                            sSetNode     );
+
+
+    /** commit all changes made on the specified configuration access.
+     *
+     *  This method must be used in combination with openConfig().
+     *  The cached configuration access must be provided here.
+     *
+     *  @param  xCFG
+     *          the configuration root, where changes should be committed.
+     *
+     *  @throw  Any exceptions the underlying configuration can throw.
+     *          E.g. css::uno::Exception if the provided configuration
+     *          access does not allow writing for this set.
+     */
+    static void flush(const css::uno::Reference< css::uno::XInterface >& xCFG);
+
+
+    /** does the same then openConfig() & readRelativeKey() together.
+     *
+     * This method should be used for reading one key at one code place only.
+     * Because it opens the specified configuration package, reads the key and
+     * closes the configuration again.
+     *
+     * So it's not very useful to use this method for reading multiple keys at the same time.
+     * (Excepting these keys exists inside different configuration packages ...))
+     */
+    static css::uno::Any readDirectKey(const css::uno::Reference< css::uno::XComponentContext >&    rxContext,
+                                       const OUString&                                       sPackage,
+                                       const OUString&                                       sRelPath,
+                                       const OUString&                                       sKey    ,
+                                             EConfigurationModes                             eMode   );
+
+
+    /** does the same then openConfig() / writeRelativeKey() & flush() together.
+     *
+     * This method should be used for writing one key at one code place only.
+     * Because it opens the specified configuration package, writes the key, flush
+     * all changes and closes the configuration again.
+     *
+     * So it's not very useful to use this method for writing multiple keys at the same time.
+     * (Excepting these keys exists inside different configuration packages ...))
+     */
+    static void writeDirectKey(const css::uno::Reference< css::uno::XComponentContext >&    rxContext,
+                               const OUString&                                       sPackage,
+                               const OUString&                                       sRelPath,
+                               const OUString&                                       sKey    ,
+                               const css::uno::Any&                                  aValue  ,
+                                     EConfigurationModes                             eMode   );
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_CONFIGURATIONHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/configurationlistener.hxx b/include/comphelper/configurationlistener.hxx
new file mode 100644
index 000000000..55342514c
--- /dev/null
+++ b/include/comphelper/configurationlistener.hxx
@@ -0,0 +1,121 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_CONFIGURATIONLISTENER_HXX
+#define INCLUDED_COMPHELPER_CONFIGURATIONLISTENER_HXX
+
+#include <vector>
+#include <comphelper/comphelperdllapi.h>
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <rtl/ref.hxx>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/processfactory.hxx>
+#include <comphelper/configurationhelper.hxx>
+
+namespace com::sun::star::beans { struct PropertyChangeEvent; }
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace comphelper {
+
+class ConfigurationListener;
+
+class COMPHELPER_DLLPUBLIC ConfigurationListenerPropertyBase {
+public:
+    OUString maName;
+    rtl::Reference<ConfigurationListener> mxListener;
+
+    virtual ~ConfigurationListenerPropertyBase() {}
+    virtual void setProperty(const css::uno::Any &aProperty) = 0;
+    void dispose() { mxListener.clear(); }
+};
+
+/// Access to this class must be protected by the SolarMutex
+template< typename uno_type > class ConfigurationListenerProperty : public ConfigurationListenerPropertyBase
+{
+    uno_type maValue;
+protected:
+    virtual void setProperty(const css::uno::Any &aProperty) override
+    {
+        aProperty >>= maValue;
+    }
+public:
+    /**
+     * Provide a mirror of the configmgr's version of this property
+     * for the lifecycle of this property. The property value tracks
+     * the same value in the configuration.
+     */
+    inline ConfigurationListenerProperty(const rtl::Reference< ConfigurationListener > &xListener,
+                                             const OUString &rProp );
+
+    virtual inline ~ConfigurationListenerProperty() override;
+
+    uno_type get() const { return maValue; }
+};
+
+// workaround for incremental linking bugs in MSVC2019
+class SAL_DLLPUBLIC_TEMPLATE ConfigurationListener_Base : public cppu::WeakImplHelper< css::beans::XPropertyChangeListener > {};
+class COMPHELPER_DLLPUBLIC ConfigurationListener final : public ConfigurationListener_Base
+{
+    css::uno::Reference< css::beans::XPropertySet > mxConfig;
+    std::vector< ConfigurationListenerPropertyBase * > maListeners;
+    bool mbDisposed;
+public:
+    /// Public health warning, you -must- dispose this if you use it.
+    ConfigurationListener(const OUString &rPath,
+                          css::uno::Reference< css::uno::XComponentContext >
+                          const & xContext = comphelper::getProcessComponentContext())
+        : mxConfig( ConfigurationHelper::openConfig( xContext, rPath, EConfigurationModes::ReadOnly ),
+                    css::uno::UNO_QUERY_THROW )
+        , mbDisposed(false)
+    { }
+
+    virtual ~ConfigurationListener() override
+    {
+        dispose();
+    }
+
+    /// Listen for the specific property denoted by the listener
+    void addListener(ConfigurationListenerPropertyBase *pListener);
+
+    /// Stop listening.
+    void removeListener(ConfigurationListenerPropertyBase *pListener);
+
+    /// Release various circular references
+    void dispose();
+
+    // XPropertyChangeListener implementation
+    virtual void SAL_CALL disposing(css::lang::EventObject const &) override;
+
+    /// Notify of the property change
+    virtual void SAL_CALL propertyChange(
+        css::beans::PropertyChangeEvent const &rEvt ) override;
+
+    bool isDisposed() const { return mbDisposed; }
+};
+
+template< typename uno_type > ConfigurationListenerProperty< uno_type >::ConfigurationListenerProperty(const rtl::Reference< ConfigurationListener > &xListener, const OUString &rProp )
+    : maValue()
+{
+    maName = rProp;
+    mxListener = xListener;
+    mxListener->addListener(this);
+}
+
+template< typename uno_type > ConfigurationListenerProperty< uno_type >::~ConfigurationListenerProperty()
+{
+    if (mxListener.is())
+        mxListener->removeListener(this);
+}
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_CONFIGURATIONLISTENER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/container.hxx b/include/comphelper/container.hxx
new file mode 100644
index 000000000..84acfc5b0
--- /dev/null
+++ b/include/comphelper/container.hxx
@@ -0,0 +1,76 @@
+/* -*- 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_COMPHELPER_CONTAINER_HXX
+#define INCLUDED_COMPHELPER_CONTAINER_HXX
+
+#include <vector>
+#include <com/sun/star/uno/Reference.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+
+namespace comphelper
+{
+
+
+//= IndexAccessIterator
+
+/** an iterator that iterates through all elements, starting from an XIndexAccess (pre-order)
+*/
+class COMPHELPER_DLLPUBLIC IndexAccessIterator
+{
+protected:
+    css::uno::Reference< css::uno::XInterface>    m_xStartingPoint;
+
+    css::uno::Reference< css::uno::XInterface>    m_xCurrentObject;
+        // The current object
+    ::std::vector<sal_Int32>                      m_arrChildIndizies;
+
+        // I'm moving through a tree, but its elements have no GetNextSibling,
+        // so I have to remember where each child is in relation to its parent.
+        // That is the path from the root node to m_xCurrentObject
+
+public:
+    IndexAccessIterator(css::uno::Reference< css::uno::XInterface> xStartingPoint);
+
+    virtual ~IndexAccessIterator();
+
+    css::uno::Reference< css::uno::XInterface> const &    Next();
+
+    virtual void Invalidate() { m_xCurrentObject = nullptr; }
+
+protected:
+    virtual bool ShouldHandleElement(const css::uno::Reference< css::uno::XInterface>& /*rElement*/) { return true; }
+
+        // This can be used to exclude certain elements; elements for which
+        // this function returns sal_True will be simply skipped.
+        // If this element is returned from Next(), then one can get
+        // here get a little more information on the element.
+        // That's why this method is not const.
+    virtual bool ShouldStepInto(const css::uno::Reference< css::uno::XInterface>& /*xContainer*/) const { return true; }
+};
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_CONTAINER_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/containermultiplexer.hxx b/include/comphelper/containermultiplexer.hxx
new file mode 100644
index 000000000..5b40b62ae
--- /dev/null
+++ b/include/comphelper/containermultiplexer.hxx
@@ -0,0 +1,106 @@
+/* -*- 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_COMPHELPER_CONTAINERMULTIPLEXER_HXX
+#define INCLUDED_COMPHELPER_CONTAINERMULTIPLEXER_HXX
+
+#include <com/sun/star/container/XContainerListener.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ref.hxx>
+
+namespace osl { class Mutex; }
+namespace com::sun::star::container { class XContainer; }
+
+
+namespace comphelper
+{
+
+
+    class OContainerListenerAdapter;
+
+    //= OContainerListener
+
+    /** a non-UNO container listener
+        <p>Useful if you have a non-refcountable class which should act as container listener.<br/>
+        In this case, derive this class from OContainerListener, and create an adapter
+        OContainerListenerAdapter which multiplexes the changes.</p>
+    */
+    class COMPHELPER_DLLPUBLIC OContainerListener
+    {
+        friend class OContainerListenerAdapter;
+    protected:
+        rtl::Reference<OContainerListenerAdapter>  m_xAdapter;
+        ::osl::Mutex&                              m_rMutex;
+
+    public:
+        OContainerListener(::osl::Mutex& _rMutex);
+        virtual ~OContainerListener();
+
+        /// @throws css::uno::RuntimeException
+        virtual void _elementInserted( const css::container::ContainerEvent& _rEvent );
+        /// @throws css::uno::RuntimeException
+        virtual void _elementRemoved( const css::container::ContainerEvent& _rEvent );
+        /// @throws css::uno::RuntimeException
+        virtual void _elementReplaced( const css::container::ContainerEvent& _rEvent );
+        /// @throws css::uno::RuntimeException
+        virtual void _disposing(const css::lang::EventObject& _rSource);
+
+    protected:
+        void setAdapter(OContainerListenerAdapter* _pAdapter);
+    };
+
+    // workaround for incremental linking bugs in MSVC2015
+    class SAL_DLLPUBLIC_TEMPLATE OContainerListenerAdapter_Base : public cppu::WeakImplHelper< css::container::XContainerListener > {};
+
+    class COMPHELPER_DLLPUBLIC OContainerListenerAdapter final : public OContainerListenerAdapter_Base
+    {
+        friend class OContainerListener;
+
+    private:
+        css::uno::Reference< css::container::XContainer >
+                                m_xContainer;
+        OContainerListener*     m_pListener;
+
+        virtual ~OContainerListenerAdapter() override;
+
+    public:
+        OContainerListenerAdapter(OContainerListener* _pListener,
+            const  css::uno::Reference< css::container::XContainer >& _rxContainer);
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const  css::lang::EventObject& Source ) override;
+
+        // XContainerListener
+        virtual void SAL_CALL elementInserted( const css::container::ContainerEvent& Event ) override;
+        virtual void SAL_CALL elementRemoved( const css::container::ContainerEvent& Event ) override;
+        virtual void SAL_CALL elementReplaced( const css::container::ContainerEvent& Event ) override;
+
+        /// dispose the object. No multiplexing anymore
+        void        dispose();
+
+    };
+
+
+}   // namespace dbaui
+
+
+#endif // INCLUDED_COMPHELPER_CONTAINERMULTIPLEXER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/crashzone.hxx b/include/comphelper/crashzone.hxx
new file mode 100644
index 000000000..f15f848cd
--- /dev/null
+++ b/include/comphelper/crashzone.hxx
@@ -0,0 +1,70 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_CRASHZONE_H
+#define INCLUDED_COMPHELPER_CRASHZONE_H
+
+#include <sal/config.h>
+
+#include <atomic>
+#include <csignal>
+#include <type_traits>
+
+struct CrashWatchdogTimingsValues
+{
+    /// delays to take various actions in 1/4 of a second increments.
+    int mnDisableEntries;
+    int const mnAbortAfter;
+};
+
+/**
+ * A generic class for detecting if a given crash or a lock-up came from a specific
+ * area of code (such as OpenGL).
+ * Use this helper to track that.
+ * The class is a template so that there can be multiple instances of static variables.
+ */
+template <typename Dummy> class CrashZone
+{
+// gnEnterCount and gnLeaveCount are accessed both from multiple threads (cf.
+// WatchdogThread::execute; so need to be of atomic type) and from signal handlers (cf.
+// VCLExceptionSignal_impl; so need to be of lock-free atomic type).  sig_atomic_t is chosen as
+// the underlying type under the assumption that it is most likely to lead to an atomic type
+// that is actually lock-free.  However, gnEnterCount and gnLeaveCount are both monotonically
+// increasing, so will eventually overflow, so the underlying type better be unsigned, which
+// sig_atomic_t is not guaranteed to be:
+#if !defined ARM32 || (defined ARM32 && defined __ARM_PCS_VFP)
+    using AtomicCounter = std::atomic<std::make_unsigned_t<std::sig_atomic_t>>;
+    static_assert(AtomicCounter::is_always_lock_free);
+#else
+    using AtomicCounter = volatile std::make_unsigned_t<std::sig_atomic_t>;
+#endif
+
+    /// how many times have we entered a zone
+    static inline AtomicCounter gnEnterCount = 0;
+    /// how many times have we left a new zone
+    static inline AtomicCounter gnLeaveCount = 0;
+
+public:
+    CrashZone() { enter(); }
+    ~CrashZone() { leave(); }
+    static bool isInZone() { return gnEnterCount != gnLeaveCount; }
+    static const AtomicCounter& enterCount() { return gnEnterCount; }
+    // prefer creating instances to manually calling enter()/leave()
+    static void enter() { gnEnterCount++; }
+    static void leave() { gnLeaveCount++; }
+    // these should be implemented for each specific zone if needed
+    // static void hardDisable();
+    // static const CrashWatchdogTimingsValues& getCrashWatchdogTimingsValues();
+    // static void checkDebug(int nUnchanged, const CrashWatchdogTimingsValues& aTimingValues);
+    // static const char* name();
+};
+
+#endif // INCLUDED_COMPHELPER_CRASHZONE_H
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/debuggerinfo.hxx b/include/comphelper/debuggerinfo.hxx
new file mode 100644
index 000000000..8c4c0a4cb
--- /dev/null
+++ b/include/comphelper/debuggerinfo.hxx
@@ -0,0 +1,38 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_DEBUGINFO_HXX
+#define INCLUDED_COMPHELPER_DEBUGINFO_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper
+{
+#if defined DBG_UTIL
+/// Returns true if the process is running with a debugger attached.
+///
+/// This is useful to disable watchdogs or increase timeouts if they trigger
+/// too soon while using a debugger.
+COMPHELPER_DLLPUBLIC bool isDebuggerAttached();
+#endif
+
+// For detecting whether Valgrind is used, add valgrind to gb_Library_use_externals
+// and then in code use:
+// #if defined HAVE_VALGRIND_HEADERS
+// #include <valgrind/memcheck.h>
+// #endif
+// ...
+// #if defined HAVE_VALGRIND_HEADERS
+//        if( RUNNING_ON_VALGRIND )
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_DEBUGINFO_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/dispatchcommand.hxx b/include/comphelper/dispatchcommand.hxx
new file mode 100644
index 000000000..384536952
--- /dev/null
+++ b/include/comphelper/dispatchcommand.hxx
@@ -0,0 +1,43 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_DISPATCHCOMMAND_HXX
+#define INCLUDED_COMPHELPER_DISPATCHCOMMAND_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+#include <com/sun/star/uno/Reference.hxx>
+
+namespace com::sun::star::beans { struct PropertyValue; }
+namespace com::sun::star::frame { class XDispatchResultListener; class XFrame; }
+namespace com::sun::star::uno { template <typename > class Sequence; }
+
+namespace comphelper
+{
+
+/** Dispatch the given UNO command in the active frame.
+
+    @param rCommand the command to dispatch, like ".uno:Bold".
+
+    @return true on success.
+*/
+COMPHELPER_DLLPUBLIC bool dispatchCommand(const OUString& rCommand,
+        const css::uno::Sequence<css::beans::PropertyValue>& rArguments,
+        const css::uno::Reference<css::frame::XDispatchResultListener>& rListener = css::uno::Reference<css::frame::XDispatchResultListener>());
+
+COMPHELPER_DLLPUBLIC bool dispatchCommand(const OUString& rCommand,
+        const css::uno::Reference<css::frame::XFrame>& rFrame,
+        const css::uno::Sequence<css::beans::PropertyValue>& rArguments,
+        const css::uno::Reference<css::frame::XDispatchResultListener>& rListener = css::uno::Reference<css::frame::XDispatchResultListener>());
+
+}
+
+#endif // INCLUDED_COMPHELPER_DISPATCHCOMMAND_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/docpasswordhelper.hxx b/include/comphelper/docpasswordhelper.hxx
new file mode 100644
index 000000000..64d7ba978
--- /dev/null
+++ b/include/comphelper/docpasswordhelper.hxx
@@ -0,0 +1,447 @@
+/* -*- 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_COMPHELPER_DOCPASSWORDHELPER_HXX
+#define INCLUDED_COMPHELPER_DOCPASSWORDHELPER_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <string_view>
+#include <vector>
+#include <comphelper/docpasswordrequest.hxx>
+#include <comphelper/hash.hxx>
+
+namespace com::sun::star::task { class XInteractionHandler; }
+namespace com::sun::star::beans { struct PropertyValue; }
+namespace com::sun::star::beans { struct NamedValue; }
+
+namespace comphelper {
+
+enum class DocPasswordVerifierResult
+{
+    OK,
+    WrongPassword,
+    Abort
+};
+
+
+/** Base class for a password verifier used by the DocPasswordHelper class
+    below.
+
+    Users have to implement the virtual functions and pass an instance of the
+    verifier to one of the password request functions.
+ */
+class COMPHELPER_DLLPUBLIC IDocPasswordVerifier
+{
+public:
+    virtual             ~IDocPasswordVerifier();
+
+    /** Will be called every time a password needs to be verified.
+
+        @param rPassword
+            The password to be verified
+
+        @param o_rEncryptionData
+            Output parameter, that is filled with the EncryptionData generated
+            from the password. The data is filled only if the validation was
+            successful.
+
+        @return  The result of the verification.
+            - DocPasswordVerifierResult_OK, if and only if the passed password
+              is valid and can be used to process the related document.
+            - DocPasswordVerifierResult_WRONG_PASSWORD, if the password is
+              wrong. The user may be asked again for a new password.
+            - DocPasswordVerifierResult_ABORT, if an unrecoverable error
+              occurred while password verification. The password request loop
+              will be aborted.
+     */
+    virtual DocPasswordVerifierResult verifyPassword( const OUString& rPassword, css::uno::Sequence< css::beans::NamedValue >& o_rEncryptionData ) = 0;
+
+    /** Will be called every time an encryption data needs to be verified.
+
+        @param rEncryptionData
+            The data will be validated
+
+        @return  The result of the verification.
+            - DocPasswordVerifierResult_OK, if and only if the passed encryption data
+              is valid and can be used to process the related document.
+            - DocPasswordVerifierResult_WRONG_PASSWORD, if the encryption data is
+              wrong.
+            - DocPasswordVerifierResult_ABORT, if an unrecoverable error
+              occurred while data verification. The password request loop
+              will be aborted.
+     */
+    virtual DocPasswordVerifierResult verifyEncryptionData( const css::uno::Sequence< css::beans::NamedValue >& o_rEncryptionData ) = 0;
+
+};
+
+
+/** Helper that asks for a document password and checks its validity.
+ */
+class COMPHELPER_DLLPUBLIC DocPasswordHelper
+{
+public:
+
+
+    /** This helper function generates the information related
+        to "Password to modify" provided by user. The result
+        sequence contains the hash and the algorithm-related
+        info.
+
+        @param aString
+            The string for which the info should be generated
+
+        @return
+            The sequence containing the hash and the algorithm-related info
+      */
+
+    static css::uno::Sequence< css::beans::PropertyValue >
+        GenerateNewModifyPasswordInfo( std::u16string_view aPassword );
+
+    /** This helper function converts a grab-bagged password, e.g. the
+        trackChanges password which has no complete inner equivalent to
+        the inner format. The result sequence contains the hash and the
+        algorithm-related info to use e.g. in IsModifyPasswordCorrect().
+
+        @param aInfo
+            The sequence containing the hash and the algorithm-related info
+            according to the OOXML origin, used by grab-bagging.
+
+        @return
+            The sequence containing the hash and the algorithm-related info
+            in the inner format.
+      */
+
+    static css::uno::Sequence< css::beans::PropertyValue > ConvertPasswordInfo(
+        const css::uno::Sequence< css::beans::PropertyValue >& aInfo );
+
+    static css::uno::Sequence<css::beans::PropertyValue>
+    GenerateNewModifyPasswordInfoOOXML(std::u16string_view aPassword);
+
+    /** This helper function allows to check whether
+        the "Password to modify" provided by user is the correct one.
+
+        @param aString
+            The string containing the provided password
+
+        @param aInfo
+            The sequence containing the hash and the algorithm-info
+
+        @return
+            <TRUE/> if the password is correct one
+            <FALSE/> otherwise
+      */
+
+    static bool IsModifyPasswordCorrect(
+                std::u16string_view aPassword,
+                const css::uno::Sequence< css::beans::PropertyValue >& aInfo );
+
+
+    /** This helper function generates the hash code based on the algorithm
+        specified by MS for "Password to modify" feature of Word.
+
+        @param aString
+            The string for which the hash should be calculated
+
+        @return
+            The hash represented by sal_uInt32
+      */
+
+    static sal_uInt32 GetWordHashAsUINT32( std::u16string_view aString );
+
+
+    /** This helper function generates the hash code based on the algorithm
+        specified by MS for "Password to modify" and passwords related to
+        table protection of Excel.
+
+        @param aString
+            The string for which the hash should be calculated
+
+        @param nEnc
+            The encoding that should be used to generate the 8-bit string
+            before the hash is generated
+
+        @return
+            The hash represented by sal_uInt16
+      */
+
+    static sal_uInt16 GetXLHashAsUINT16(
+                std::u16string_view aString,
+                rtl_TextEncoding nEnc = RTL_TEXTENCODING_UTF8 );
+
+
+    /** This helper function generates the hash code based on the algorithm
+        specified by MS for "Password to modify" and passwords related to
+        table protection.
+
+        @param aString
+            The string for which the hash should be calculated
+
+        @return
+            The hash represented by sequence of bytes in BigEndian form
+      */
+
+    static css::uno::Sequence< sal_Int8 > GetXLHashAsSequence(
+                std::u16string_view aString );
+
+
+    /** Convenience function to calculate a salted hash with iterations as
+        specified in https://msdn.microsoft.com/en-us/library/dd920692 for the
+        OOXML sheetProtection and fileSharing elements, or
+        https://msdn.microsoft.com/en-us/library/dd924776 and
+        https://msdn.microsoft.com/en-us/library/dd925430 for Standard and
+        Agile Encryption.
+
+        @param  rPassword
+                UTF-16 encoded string without leading BOM character
+
+        @param  rSaltValue
+                Base64 encoded salt that will be decoded and prepended to password
+                data.
+
+        @param  nSpinCount
+                If >0 the number of repeated iterations.
+
+        @param  eIterCount
+                If Hash::IterCount::APPEND, append iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd920692
+                If Hash::IterCount::PREPEND, prepend iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd924776 and
+                https://msdn.microsoft.com/en-us/library/dd925430
+                If Hash::IterCount::NONE, do not add the iteration count to hash
+                iterations.
+
+        @param  rAlgorithmName
+                One of "SHA-512", "SHA-256", ... as listed for AlgorithmName in
+                https://msdn.microsoft.com/en-us/library/dd920692
+                or "SHA512", "SHA256", ... as listed for HashAlgorithm in
+                https://msdn.microsoft.com/en-us/library/dd925810
+                that have a valid match in comphelper::HashType. If not, an
+                empty sequence is returned. Not all algorithm names are
+                supported.
+
+        @return the raw hash value as sal_Int8 sequence.
+     */
+    static css::uno::Sequence<sal_Int8> GetOoxHashAsSequence(
+            const OUString& rPassword,
+            std::u16string_view rSaltValue,
+            sal_uInt32 nSpinCount,
+            comphelper::Hash::IterCount eIterCount,
+             std::u16string_view rAlgorithmName);
+
+
+    /** Convenience function to calculate a salted hash with iterations as
+        specified in https://msdn.microsoft.com/en-us/library/dd920692 for the
+        OOXML sheetProtection and fileSharing elements, or
+        https://msdn.microsoft.com/en-us/library/dd924776 and
+        https://msdn.microsoft.com/en-us/library/dd925430 for Standard and
+        Agile Encryption.
+
+        @param  rPassword
+                UTF-16 encoded string without leading BOM character
+
+        @param  rSaltValue
+                Base64 encoded salt that will be decoded and prepended to password
+                data.
+
+        @param  nSpinCount
+                If >0 the number of repeated iterations.
+
+        @param  eIterCount
+                If Hash::IterCount::APPEND, append iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd920692
+                If Hash::IterCount::PREPEND, prepend iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd924776 and
+                https://msdn.microsoft.com/en-us/library/dd925430
+                If Hash::IterCount::NONE, do not add the iteration count to hash
+                iterations.
+
+        @param  rAlgorithmName
+                One of "SHA-512", "SHA-256", ... as listed for AlgorithmName in
+                https://msdn.microsoft.com/en-us/library/dd920692
+                or "SHA512", "SHA256", ... as listed for HashAlgorithm in
+                https://msdn.microsoft.com/en-us/library/dd925810
+                that have a valid match in comphelper::HashType. If not, an
+                empty sequence is returned. Not all algorithm names are
+                supported.
+
+        @return the base64 encoded string of the hash value, that can be
+                compared against a stored base64 encoded hash value.
+     */
+    static OUString GetOoxHashAsBase64(
+            const OUString& rPassword,
+            std::u16string_view rSaltValue,
+            sal_uInt32 nSpinCount,
+            comphelper::Hash::IterCount eIterCount,
+            std::u16string_view rAlgorithmName);
+
+
+    /** Convenience function to calculate a salted hash with iterations as
+        specified in https://msdn.microsoft.com/en-us/library/dd920692 for the
+        OOXML sheetProtection and fileSharing elements, or
+        https://msdn.microsoft.com/en-us/library/dd924776 and
+        https://msdn.microsoft.com/en-us/library/dd925430 for Standard and
+        Agile Encryption.
+
+        @param  rPassword
+                UTF-16 encoded string without leading BOM character
+
+        @param  rSaltValue
+                A raw salt that will be prepended to password data.
+
+        @param  nSpinCount
+                If >0 the number of repeated iterations.
+
+        @param  eIterCount
+                If Hash::IterCount::APPEND, append iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd920692
+                If Hash::IterCount::PREPEND, prepend iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd924776 and
+                https://msdn.microsoft.com/en-us/library/dd925430
+                If Hash::IterCount::NONE, do not add the iteration count to hash
+                iterations.
+
+        @param  rAlgorithmName
+                One of "SHA-512", "SHA-256", ... as listed for AlgorithmName in
+                https://msdn.microsoft.com/en-us/library/dd920692
+                or "SHA512", "SHA256", ... as listed for HashAlgorithm in
+                https://msdn.microsoft.com/en-us/library/dd925810
+                that have a valid match in comphelper::HashType. If not, an
+                empty sequence is returned. Not all algorithm names are
+                supported.
+
+        @return the raw the hash value.
+     */
+    static std::vector<unsigned char> GetOoxHashAsVector(
+            const OUString& rPassword,
+            const std::vector<unsigned char>& rSaltValue,
+            sal_uInt32 nSpinCount,
+            comphelper::Hash::IterCount eIterCount,
+            std::u16string_view rAlgorithmName);
+
+
+    /** This helper function generates a random sequence of bytes of
+        requested length.
+      */
+
+    static css::uno::Sequence< sal_Int8 > GenerateRandomByteSequence(
+                sal_Int32 nLength );
+
+
+    /** This helper function generates a byte sequence representing the
+        key digest value used by MSCodec_Std97 codec.
+      */
+
+    static css::uno::Sequence< sal_Int8 > GenerateStd97Key(
+                std::u16string_view aPassword,
+                const css::uno::Sequence< sal_Int8 >& aDocId );
+
+
+    /** This helper function generates a byte sequence representing the
+        key digest value used by MSCodec_Std97 codec.
+      */
+
+    static css::uno::Sequence< sal_Int8 > GenerateStd97Key(
+                const sal_uInt16 pPassData[16],
+                const css::uno::Sequence< sal_Int8 >& aDocId );
+
+    /** This helper function generates a byte sequence representing the
+        key digest value used by MSCodec_Std97 codec.
+      */
+
+    static css::uno::Sequence< sal_Int8 > GenerateStd97Key(
+                const sal_uInt16 pPassData[16],
+                const sal_uInt8 pDocId[16] );
+
+
+    /** This helper function tries to request and verify a password to load a
+        protected document.
+
+        First, the list of default passwords will be tried if provided. This is
+        needed by import filters for external file formats that have to check a
+        predefined password in some cases without asking the user for a
+        password. Every password is checked using the passed password verifier.
+
+        If not successful, the passed password of a medium is tried, that has
+        been set e.g. by an API call to load a document. If existing, the
+        password is checked using the passed password verifier.
+
+        If still not successful, the passed interaction handler is used to
+        request a password from the user. This will be repeated until the
+        passed password verifier validates the entered password, or if the user
+        chooses to cancel password input.
+
+        @param rVerifier
+            The password verifier used to check every processed password.
+
+        @param rMediaPassword
+            If not empty, will be passed to the password validator before
+            requesting a password from the user. This password usually should
+            be querried from a media descriptor.
+
+        @param rxInteractHandler
+            The interaction handler that will be used to request a password
+            from the user, e.g. by showing a password input dialog.
+
+        @param rDocumentUrl
+            The URL of the related document that will be shown in the password
+            input dialog.
+
+        @param eRequestType
+            The password request type that will be passed to the
+            DocPasswordRequest object created internally. See
+            docpasswordrequest.hxx for more details.
+
+        @param pDefaultPasswords
+            If not null, contains default passwords that will be tried before a
+            password will be requested from the media descriptor or the user.
+
+        @param pbIsDefaultPassword
+            (output parameter) If not null, the type of the found password will
+            be returned. True means the password has been found in the passed
+            list of default passwords. False means the password has been taken
+            from the rMediaPassword parameter or has been entered by the user.
+
+        @return
+            If not empty, contains the password that has been validated by the
+            passed password verifier. If empty, no valid password has been
+            found, or the user has chosen to cancel password input.
+     */
+    static css::uno::Sequence< css::beans::NamedValue > requestAndVerifyDocPassword(
+                            IDocPasswordVerifier& rVerifier,
+                            const css::uno::Sequence< css::beans::NamedValue >& rMediaEncData,
+                            const OUString& rMediaPassword,
+                            const css::uno::Reference< css::task::XInteractionHandler >& rxInteractHandler,
+                            const OUString& rDocumentUrl,
+                            DocPasswordRequestType eRequestType,
+                            const ::std::vector< OUString >* pDefaultPasswords = nullptr,
+                            bool* pbIsDefaultPassword = nullptr );
+
+    static css::uno::Sequence< css::beans::NamedValue > decryptGpgSession(
+        const css::uno::Sequence< css::uno::Sequence< css::beans::NamedValue > >& rGpgProperties);
+
+private:
+                        ~DocPasswordHelper();
+};
+
+
+} // namespace comphelper
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/docpasswordrequest.hxx b/include/comphelper/docpasswordrequest.hxx
new file mode 100644
index 000000000..a4e8704eb
--- /dev/null
+++ b/include/comphelper/docpasswordrequest.hxx
@@ -0,0 +1,110 @@
+/* -*- 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_COMPHELPER_DOCPASSWORDREQUEST_HXX
+#define INCLUDED_COMPHELPER_DOCPASSWORDREQUEST_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <com/sun/star/task/PasswordRequestMode.hpp>
+#include <com/sun/star/task/XInteractionRequest.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <rtl/ref.hxx>
+
+namespace com::sun::star::task { class XInteractionAbort; }
+
+namespace comphelper {
+
+class PasswordContinuation;
+
+
+/** Selects which UNO document password request type to use. */
+enum class DocPasswordRequestType
+{
+    Standard,    /// Uses the standard com.sun.star.task.DocumentPasswordRequest request.
+    MS           /// Uses the com.sun.star.task.DocumentMSPasswordRequest request.
+};
+
+
+class COMPHELPER_DLLPUBLIC SimplePasswordRequest final :
+        public cppu::WeakImplHelper<css::task::XInteractionRequest>
+{
+public:
+    explicit    SimplePasswordRequest();
+    virtual     ~SimplePasswordRequest() override;
+
+    bool         isPassword() const;
+
+    OUString     getPassword() const;
+
+private:
+    SimplePasswordRequest(SimplePasswordRequest const&) = delete;
+    SimplePasswordRequest& operator=(SimplePasswordRequest const&) = delete;
+
+    // XInteractionRequest
+    virtual css::uno::Any SAL_CALL getRequest() override;
+    virtual css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > > SAL_CALL getContinuations() override;
+
+private:
+    css::uno::Any                         maRequest;
+    css::uno::Reference<css::task::XInteractionAbort> mxAbort;
+    rtl::Reference<PasswordContinuation>  mxPassword;
+};
+
+
+/** Implements the task.XInteractionRequest interface for requesting a password
+    string for a document.
+ */
+class COMPHELPER_DLLPUBLIC DocPasswordRequest final :
+        public cppu::WeakImplHelper<css::task::XInteractionRequest>
+{
+public:
+    explicit            DocPasswordRequest(
+                            DocPasswordRequestType eType,
+                            css::task::PasswordRequestMode eMode,
+                            const OUString& rDocumentUrl,
+                            bool bPasswordToModify = false );
+    virtual             ~DocPasswordRequest() override;
+
+    bool            isPassword() const;
+
+    OUString     getPassword() const;
+
+    OUString     getPasswordToModify() const;
+    bool            getRecommendReadOnly() const;
+
+private:
+    DocPasswordRequest(DocPasswordRequest const&) = delete;
+    DocPasswordRequest& operator=(DocPasswordRequest const&) = delete;
+
+    // XInteractionRequest
+    virtual css::uno::Any SAL_CALL getRequest() override;
+    virtual css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > > SAL_CALL getContinuations() override;
+
+private:
+    css::uno::Any                         maRequest;
+    css::uno::Reference<css::task::XInteractionAbort> mxAbort;
+    rtl::Reference<PasswordContinuation>  mxPassword;
+};
+
+
+} // namespace comphelper
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/documentconstants.hxx b/include/comphelper/documentconstants.hxx
new file mode 100644
index 000000000..aafa84e75
--- /dev/null
+++ b/include/comphelper/documentconstants.hxx
@@ -0,0 +1,130 @@
+/* -*- 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_COMPHELPER_DOCUMENTCONSTANTS_HXX
+#define INCLUDED_COMPHELPER_DOCUMENTCONSTANTS_HXX
+
+#include <o3tl/typed_flags_set.hxx>
+#include <rtl/ustring.hxx>
+
+// formats of SO6/7
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_WRITER_ASCII = u"application/vnd.sun.xml.writer";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_WRITER_WEB_ASCII = u"application/vnd.sun.xml.writer.web";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_WRITER_GLOBAL_ASCII = u"application/vnd.sun.xml.writer.global";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_DRAW_ASCII = u"application/vnd.sun.xml.draw";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_IMPRESS_ASCII = u"application/vnd.sun.xml.impress";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_CALC_ASCII = u"application/vnd.sun.xml.calc";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_CHART_ASCII = u"application/vnd.sun.xml.chart";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_MATH_ASCII = u"application/vnd.sun.xml.math";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_BASE_ASCII = u"application/vnd.sun.xml.base";
+
+// template formats of SO6/7
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_WRITER_TEMPLATE_ASCII = u"application/vnd.sun.xml.writer.template";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_DRAW_TEMPLATE_ASCII = u"application/vnd.sun.xml.draw.template";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_IMPRESS_TEMPLATE_ASCII = u"application/vnd.sun.xml.impress.template";
+inline constexpr OUStringLiteral MIMETYPE_VND_SUN_XML_CALC_TEMPLATE_ASCII = u"application/vnd.sun.xml.calc.template";
+
+// formats of SO8
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_TEXT_ASCII = u"application/vnd.oasis.opendocument.text";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_TEXT_WEB_ASCII = u"application/vnd.oasis.opendocument.text-web";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_TEXT_GLOBAL_ASCII = u"application/vnd.oasis.opendocument.text-master";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_DRAWING_ASCII = u"application/vnd.oasis.opendocument.graphics";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_PRESENTATION_ASCII = u"application/vnd.oasis.opendocument.presentation";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_SPREADSHEET_ASCII = u"application/vnd.oasis.opendocument.spreadsheet";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_CHART_ASCII = u"application/vnd.oasis.opendocument.chart";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_FORMULA_ASCII = u"application/vnd.oasis.opendocument.formula";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_DATABASE_ASCII = u"application/vnd.oasis.opendocument.base";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_REPORT_ASCII = u"application/vnd.sun.xml.report";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_REPORT_CHART_ASCII = u"application/vnd.sun.xml.report.chart";
+
+// template formats of SO8
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_TEXT_TEMPLATE_ASCII = u"application/vnd.oasis.opendocument.text-template";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_TEXT_GLOBAL_TEMPLATE_ASCII = u"application/vnd.oasis.opendocument.text-master-template";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_DRAWING_TEMPLATE_ASCII = u"application/vnd.oasis.opendocument.graphics-template";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_PRESENTATION_TEMPLATE_ASCII = u"application/vnd.oasis.opendocument.presentation-template";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_SPREADSHEET_TEMPLATE_ASCII = u"application/vnd.oasis.opendocument.spreadsheet-template";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_CHART_TEMPLATE_ASCII = u"application/vnd.oasis.opendocument.chart-template";
+inline constexpr OUStringLiteral MIMETYPE_OASIS_OPENDOCUMENT_FORMULA_TEMPLATE_ASCII = u"application/vnd.oasis.opendocument.formula-template";
+
+
+// ODF versions
+inline constexpr OUStringLiteral ODFVER_010_TEXT = u"1.0";
+inline constexpr OUStringLiteral ODFVER_011_TEXT = u"1.1";
+inline constexpr OUStringLiteral ODFVER_012_TEXT = u"1.2";
+inline constexpr OUStringLiteral ODFVER_013_TEXT = u"1.3";
+
+// filter flags
+// TODO/LATER: The flags should be part of the UNO specification
+//
+// http://www.mail-archive.com/dev@openoffice.org/msg05047.html says:
+//
+// I can just sum up what comes into my mind, hope I don't miss one:
+//
+// Import                  - should be self explaining
+// Export                  - should be self explaining
+// Template                - deprecated
+// TemplatePath            - filter for a documenttemplate
+// Own                     - one of the OOo file formats
+// Alien                   - no zip container based format
+// Preferred               - preferred filter for a particular type
+// 3rdPartyFilter          - implemented as a UNO component
+// Default                 - default filter for this document type
+// Exotic                  - an unusual/legacy file-format, we don't normally see
+//
+// (The 3rdPartyFilter flag is here called StarONE)
+//
+enum class SfxFilterFlags
+{
+    NONE              = 0,
+    IMPORT            = 0x00000001,
+    EXPORT            = 0x00000002,
+    TEMPLATE          = 0x00000004,
+    INTERNAL          = 0x00000008,
+    TEMPLATEPATH      = 0x00000010,
+    OWN               = 0x00000020,
+    ALIEN             = 0x00000040,
+
+    DEFAULT           = 0x00000100,
+    SUPPORTSSELECTION = 0x00000400,
+    NOTINFILEDLG      = 0x00001000,
+
+    OPENREADONLY      = 0x00010000,
+    MUSTINSTALL       = 0x00020000,
+    CONSULTSERVICE    = 0x00040000,
+    STARONEFILTER     = 0x00080000,
+    PACKED            = 0x00100000,
+    EXOTIC            = 0x00200000,
+    COMBINED          = 0x00800000,
+
+    ENCRYPTION        = 0x01000000,
+    PASSWORDTOMODIFY  = 0x02000000,
+    GPGENCRYPTION     = 0x04000000,
+    PREFERED          = 0x10000000,
+    STARTPRESENTATION = 0x20000000,
+    SUPPORTSSIGNING   = 0x40000000,
+};
+
+namespace o3tl
+{
+    template<> struct typed_flags<SfxFilterFlags> : is_typed_flags<SfxFilterFlags, 0x77bf157f> {};
+}
+
+#define SFX_FILTER_NOTINSTALLED (SfxFilterFlags::MUSTINSTALL | SfxFilterFlags::CONSULTSERVICE)
+
+#endif
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/documentinfo.hxx b/include/comphelper/documentinfo.hxx
new file mode 100644
index 000000000..a7002120a
--- /dev/null
+++ b/include/comphelper/documentinfo.hxx
@@ -0,0 +1,51 @@
+/* -*- 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_COMPHELPER_DOCUMENTINFO_HXX
+#define INCLUDED_COMPHELPER_DOCUMENTINFO_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star::frame { class XModel; }
+namespace com::sun::star::uno { template <class interface_type> class Reference; }
+
+
+namespace comphelper {
+
+
+    //= DocumentInfo
+
+    namespace  DocumentInfo
+    {
+        /** retrieves the UI title of the given document
+        */
+        COMPHELPER_DLLPUBLIC OUString  getDocumentTitle( const css::uno::Reference< css::frame::XModel >& _rxDocument );
+
+        /** notify that this document contains a macro event handler
+        */
+        COMPHELPER_DLLPUBLIC void notifyMacroEventRead( const css::uno::Reference< css::frame::XModel >& _rxDocument );
+    }
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_DOCUMENTINFO_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/doublecheckedinit.hxx b/include/comphelper/doublecheckedinit.hxx
new file mode 100644
index 000000000..200a9c88c
--- /dev/null
+++ b/include/comphelper/doublecheckedinit.hxx
@@ -0,0 +1,64 @@
+/* -*- 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_COMPHELPER_DOUBLECHECKEDINIT_HXX
+#define INCLUDED_COMPHELPER_DOUBLECHECKEDINIT_HXX
+
+#include <osl/getglobalmutex.hxx>
+
+#include <atomic>
+// HACK: <atomic> includes <stdbool.h>, which in some Clang versions does '#define bool bool',
+// which confuses clang plugins.
+#undef bool
+#include <functional>
+
+namespace comphelper
+{
+/**
+ * Thread-safe singleton creation.
+ *
+ * It is normally sufficient to create singletons using static variables in a function.
+ * This function is only for use cases that have a more complex lifetime of the object,
+ * such as when the object may require specific cleanup or may be created more times
+ * (e.g. when there is a "singleton" per each instance of another object).
+ */
+template <typename Type, typename Function = std::function<Type*()>,
+          typename Guard = osl::MutexGuard, typename GuardCtor = osl::GetGlobalMutex>
+static inline Type* doubleCheckedInit(std::atomic<Type*>& pointer, Function function,
+                                      GuardCtor guardCtor = osl::GetGlobalMutex())
+{
+    Type* p = pointer.load(std::memory_order_acquire);
+    if (!p)
+    {
+        Guard guard(guardCtor());
+        p = pointer.load(std::memory_order_relaxed);
+        if (!p)
+        {
+            p = function();
+            pointer.store(p, std::memory_order_release);
+        }
+    }
+    return p;
+}
+
+} // namespace
+
+#endif // INCLUDED_COMPHELPER_DOUBLECHECKEDINIT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/embeddedobjectcontainer.hxx b/include/comphelper/embeddedobjectcontainer.hxx
new file mode 100644
index 000000000..cc040da15
--- /dev/null
+++ b/include/comphelper/embeddedobjectcontainer.hxx
@@ -0,0 +1,193 @@
+/* -*- 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_COMPHELPER_EMBEDDEDOBJECTCONTAINER_HXX
+#define INCLUDED_COMPHELPER_EMBEDDEDOBJECTCONTAINER_HXX
+
+#include <com/sun/star/uno/Reference.h>
+#include <com/sun/star/uno/Sequence.h>
+#include <comphelper/comphelperdllapi.h>
+
+#include <rtl/ustring.hxx>
+#include <memory>
+
+namespace com::sun::star::beans { struct PropertyValue; }
+namespace com::sun::star::embed { class XEmbeddedObject; }
+namespace com::sun::star::embed { class XStorage; }
+namespace com::sun::star::io { class XInputStream; }
+namespace com::sun::star::task { class XInteractionHandler; }
+namespace com::sun::star::uno { class XInterface; }
+
+namespace comphelper
+{
+    class EmbeddedObjectContainer;
+    /** Helper interface to give access to some common object which replace the SfxObjectShell
+    */
+    class SAL_NO_VTABLE SAL_DLLPUBLIC_RTTI IEmbeddedHelper
+    {
+    public:
+        virtual EmbeddedObjectContainer& getEmbeddedObjectContainer() const = 0;
+        virtual css::uno::Reference < css::embed::XStorage > getStorage() const = 0;
+        virtual css::uno::Reference< css::task::XInteractionHandler > getInteractionHandler() const = 0;
+        virtual bool isEnableSetModified() const = 0;
+        virtual OUString getDocumentBaseURL() const = 0;
+
+    protected:
+        ~IEmbeddedHelper() {}
+    };
+
+struct EmbedImpl;
+class COMPHELPER_DLLPUBLIC EmbeddedObjectContainer
+{
+    std::unique_ptr<EmbedImpl>  pImpl;
+
+    css::uno::Reference < css::embed::XEmbeddedObject > Get_Impl( const OUString&,
+            const css::uno::Reference < css::embed::XEmbeddedObject >& xCopy,
+            OUString const* pBaseURL);
+
+public:
+    // add an embedded object to the container storage
+    bool StoreEmbeddedObject(
+        const css::uno::Reference<css::embed::XEmbeddedObject>& xObj, OUString& rName, bool bCopy,
+        const OUString& rSrcShellID, const OUString& rDestShellID );
+
+    // add an embedded object that has been imported from the container storage - should only be called by filters!
+    void                AddEmbeddedObject( const css::uno::Reference < css::embed::XEmbeddedObject >&, const OUString& );
+
+                        EmbeddedObjectContainer();
+                        EmbeddedObjectContainer( const css::uno::Reference < css::embed::XStorage >& );
+                        EmbeddedObjectContainer( const css::uno::Reference < css::embed::XStorage >&,
+                                                 const css::uno::Reference < css::uno::XInterface >& );
+                        ~EmbeddedObjectContainer();
+
+    void                SwitchPersistence( const css::uno::Reference < css::embed::XStorage >& );
+    bool                CommitImageSubStorage();
+    void                ReleaseImageSubStorage();
+
+    OUString     CreateUniqueObjectName();
+
+    // get a list of object names that have been added so far
+    css::uno::Sequence < OUString > GetObjectNames() const;
+
+    // check for existence of objects at all
+    bool            HasEmbeddedObjects() const;
+
+    // check existence of an object - either by identity or by name
+    bool            HasEmbeddedObject( const OUString& );
+    bool            HasEmbeddedObject( const css::uno::Reference < css::embed::XEmbeddedObject >& ) const;
+    bool            HasInstantiatedEmbeddedObject( const OUString& );
+
+    // get the object name of an object - this is the persist name if the object has persistence
+    OUString        GetEmbeddedObjectName( const css::uno::Reference < css::embed::XEmbeddedObject >& ) const;
+
+    // retrieve an embedded object by name that either has been added already or is available in the container storage
+    css::uno::Reference<css::embed::XEmbeddedObject> GetEmbeddedObject(const OUString&, OUString const* pBaseURL = nullptr);
+
+    // create an object from a ClassId
+    css::uno::Reference < css::embed::XEmbeddedObject >
+                        CreateEmbeddedObject( const css::uno::Sequence < sal_Int8 >&, OUString&,
+                                              OUString const* pBaseURL = nullptr );
+
+    css::uno::Reference < css::embed::XEmbeddedObject >
+                        CreateEmbeddedObject( const css::uno::Sequence < sal_Int8 >&,
+                        const css::uno::Sequence < css::beans::PropertyValue >&, OUString&,
+                        OUString const* pBaseURL = nullptr );
+
+    // insert an embedded object into the container - objects persistent representation will be added to the storage
+    bool            InsertEmbeddedObject( const css::uno::Reference < css::embed::XEmbeddedObject >&, OUString& );
+
+    // load an embedded object from a MediaDescriptor and insert it into the container
+    // a new object will be created from the new content and returned
+    css::uno::Reference < css::embed::XEmbeddedObject >
+                        InsertEmbeddedObject( const css::uno::Sequence < css::beans::PropertyValue >&, OUString& rName, OUString const* pBaseURL = nullptr);
+
+    // create an embedded link based on a MediaDescriptor and insert it into the container
+    // a new object will be created from the new content and returned
+    css::uno::Reference < css::embed::XEmbeddedObject >
+                        InsertEmbeddedLink( const css::uno::Sequence < css::beans::PropertyValue >&, OUString& );
+
+    // create an object from a stream that contains its persistent representation and insert it as usual (usually called from clipboard)
+    // a new object will be created from the new content and returned
+    css::uno::Reference < css::embed::XEmbeddedObject >
+                        InsertEmbeddedObject( const css::uno::Reference < css::io::XInputStream >&, OUString& );
+
+    // copy an embedded object into the storage, open the new copy and return it
+    css::uno::Reference <css::embed::XEmbeddedObject> CopyAndGetEmbeddedObject(
+        EmbeddedObjectContainer& rSrc, const css::uno::Reference <css::embed::XEmbeddedObject>& xObj, OUString& rName,
+        const OUString& rSrcShellID, const OUString& rDestShellID );
+
+    // remove an embedded object from the container and from the storage; if object can't be closed
+    // #i119941, bKeepToTempStorage: use to specify whether store the removed object to temporary storage+
+    void            RemoveEmbeddedObject( const OUString& rName, bool bKeepToTempStorage = true);
+    bool            RemoveEmbeddedObject( const css::uno::Reference < css::embed::XEmbeddedObject >&, bool bKeepToTempStorage = true);
+
+    // close and remove an embedded object from the container without removing it from the storage
+    void            CloseEmbeddedObject( const css::uno::Reference < css::embed::XEmbeddedObject >& );
+
+    // move an embedded object to another container (keep the persistent name)
+    bool            MoveEmbeddedObject( const OUString& rName, EmbeddedObjectContainer& );
+
+    // get the stored graphical representation for the object
+    css::uno::Reference < css::io::XInputStream > GetGraphicStream( const css::uno::Reference < css::embed::XEmbeddedObject >&, OUString* pMediaType=nullptr );
+
+    // get the stored graphical representation by the object name
+    css::uno::Reference < css::io::XInputStream > GetGraphicStream( const OUString& aName, OUString* pMediaType=nullptr );
+
+    // add a graphical representation for an object
+    bool            InsertGraphicStream( const css::uno::Reference < css::io::XInputStream >& rStream, const OUString& rObjectName, const OUString& rMediaType );
+
+    // try to add a graphical representation for an object in optimized way ( might fail )
+    bool            InsertGraphicStreamDirectly( const css::uno::Reference < css::io::XInputStream >& rStream, const OUString& rObjectName, const OUString& rMediaType );
+
+    // remove a graphical representation for an object
+    void            RemoveGraphicStream( const OUString& rObjectName );
+
+    // copy the graphical representation from different container
+    bool            TryToCopyGraphReplacement( EmbeddedObjectContainer& rSrc,
+                                                    const OUString& aOrigName,
+                                                    const OUString& aTargetName );
+
+    void            CloseEmbeddedObjects();
+    bool            StoreChildren(bool _bOasisFormat,bool _bObjectsOnly);
+    bool            StoreAsChildren( bool _bOasisFormat
+                                        ,bool _bCreateEmbedded
+                                        ,bool _bAutoSaveEvent
+                                        ,const css::uno::Reference < css::embed::XStorage >& _xStorage);
+
+    static css::uno::Reference< css::io::XInputStream > GetGraphicReplacementStream(
+                                            sal_Int64 nViewAspect,
+                                            const css::uno::Reference < css::embed::XEmbeddedObject >&,
+                                            OUString* pMediaType );
+
+    /** call setPersistentEntry for each embedded object in the container
+    *
+    * \param _xStorage The storage where to store the objects.
+    * \param _bClearModifiedFlag If <TRUE/> then the modified flag will be set to <FALSE/> otherwise nothing happen.
+    * \return <FALSE/> if no error occurred, otherwise <TRUE/>.
+    */
+    bool             SetPersistentEntries(const css::uno::Reference< css::embed::XStorage >& _xStorage,bool _bClearModifiedFlag = true);
+
+    bool getUserAllowsLinkUpdate() const;
+    void setUserAllowsLinkUpdate(bool bNew);
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/enumhelper.hxx b/include/comphelper/enumhelper.hxx
new file mode 100644
index 000000000..fb26de489
--- /dev/null
+++ b/include/comphelper/enumhelper.hxx
@@ -0,0 +1,122 @@
+/* -*- 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_COMPHELPER_ENUMHELPER_HXX
+#define INCLUDED_COMPHELPER_ENUMHELPER_HXX
+
+#include <com/sun/star/container/XEnumeration.hpp>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <cppuhelper/implbase.hxx>
+#include <mutex>
+#include <variant>
+#include <vector>
+
+namespace com::sun::star::container { class XIndexAccess; }
+namespace com::sun::star::container { class XNameAccess; }
+
+namespace comphelper
+{
+
+/** provides a com.sun.star.container::XEnumeration access based
+    on an object implementing the com.sun.star.container::XNameAccess interface
+*/
+class COMPHELPER_DLLPUBLIC OEnumerationByName final :
+                         public ::cppu::WeakImplHelper< css::container::XEnumeration ,
+                                                          css::lang::XEventListener    >
+{
+    std::variant<css::uno::Sequence< OUString >, std::vector<OUString>> m_aNames;
+    css::uno::Reference< css::container::XNameAccess >  m_xAccess;
+    sal_Int32                                           m_nPos;
+    bool                                                m_bListening;
+    std::mutex m_aLock;
+
+public:
+    OEnumerationByName(const css::uno::Reference< css::container::XNameAccess > _xAccess);
+    OEnumerationByName(const css::uno::Reference< css::container::XNameAccess > _xAccess,
+                       std::vector<OUString>             _aNames  );
+    virtual ~OEnumerationByName() override;
+
+    virtual sal_Bool SAL_CALL hasMoreElements(  ) override;
+    virtual css::uno::Any SAL_CALL nextElement(  ) override;
+
+    virtual void SAL_CALL disposing(const css::lang::EventObject& aEvent) override;
+
+private:
+    sal_Int32 getLength() const;
+    const OUString& getElement(sal_Int32 nIndex) const;
+    COMPHELPER_DLLPRIVATE void impl_startDisposeListening();
+    COMPHELPER_DLLPRIVATE void impl_stopDisposeListening();
+};
+
+/** provides a com.sun.star.container::XEnumeration access based
+    on an object implementing the com.sun.star.container::XNameAccess interface
+*/
+class COMPHELPER_DLLPUBLIC OEnumerationByIndex final :
+                          public ::cppu::WeakImplHelper< css::container::XEnumeration ,
+                                                           css::lang::XEventListener    >
+{
+    css::uno::Reference< css::container::XIndexAccess > m_xAccess;
+    sal_Int32                                         m_nPos;
+    bool                                          m_bListening;
+    std::mutex m_aLock;
+
+public:
+    OEnumerationByIndex(css::uno::Reference< css::container::XIndexAccess > _xAccess);
+    virtual ~OEnumerationByIndex() override;
+
+    virtual sal_Bool SAL_CALL hasMoreElements(  ) override;
+    virtual css::uno::Any SAL_CALL nextElement(  ) override;
+
+    virtual void SAL_CALL disposing(const css::lang::EventObject& aEvent) override;
+
+private:
+    COMPHELPER_DLLPRIVATE void impl_startDisposeListening();
+    COMPHELPER_DLLPRIVATE void impl_stopDisposeListening();
+};
+
+// this is the way that works for ENABLE_LTO with MSVC 2013
+class SAL_DLLPUBLIC_TEMPLATE OAnyEnumeration_BASE
+    : public ::cppu::WeakImplHelper<css::container::XEnumeration> {};
+
+/** provides a com.sun.star.container::XEnumeration
+    for an outside set vector of Any's.
+
+*/
+class COMPHELPER_DLLPUBLIC OAnyEnumeration final :
+                                           public OAnyEnumeration_BASE
+{
+    sal_Int32                         m_nPos;
+    css::uno::Sequence< css::uno::Any > m_lItems;
+    std::mutex m_aLock;
+
+public:
+    OAnyEnumeration(const css::uno::Sequence< css::uno::Any >& lItems);
+    virtual ~OAnyEnumeration() override;
+
+    virtual sal_Bool SAL_CALL hasMoreElements(  ) override;
+    virtual css::uno::Any SAL_CALL nextElement(  ) override;
+
+};
+
+}
+
+#endif // INCLUDED_COMPHELPER_ENUMHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/eventattachermgr.hxx b/include/comphelper/eventattachermgr.hxx
new file mode 100644
index 000000000..4a2a99909
--- /dev/null
+++ b/include/comphelper/eventattachermgr.hxx
@@ -0,0 +1,48 @@
+/* -*- 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_COMPHELPER_EVENTATTACHERMGR_HXX
+#define INCLUDED_COMPHELPER_EVENTATTACHERMGR_HXX
+
+#include <com/sun/star/uno/Reference.h>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star {
+namespace uno {
+    class XComponentContext;
+}
+namespace script {
+    class XEventAttacherManager;
+}
+}
+
+
+namespace comphelper
+{
+
+/// @throws css::uno::Exception
+COMPHELPER_DLLPUBLIC css::uno::Reference< css::script::XEventAttacherManager >
+createEventAttacherManager(
+        const css::uno::Reference< css::uno::XComponentContext > & rxContext );
+
+}
+
+#endif // INCLUDED_COMPHELPER_EVENTATTACHERMGR_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/evtlistenerhlp.hxx b/include/comphelper/evtlistenerhlp.hxx
new file mode 100644
index 000000000..212d94662
--- /dev/null
+++ b/include/comphelper/evtlistenerhlp.hxx
@@ -0,0 +1,49 @@
+/* -*- 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_COMPHELPER_EVTLISTENERHLP_HXX
+#define INCLUDED_COMPHELPER_EVTLISTENERHLP_HXX
+
+#include <config_options.h>
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <cppuhelper/weakref.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+
+namespace comphelper
+{
+
+
+    //= OCommandsListener
+    // is helper class to avoid a cycle in refcount between the XEventListener
+    // and the member XComponent
+
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OEventListenerHelper final : public ::cppu::WeakImplHelper< css::lang::XEventListener >
+    {
+        css::uno::WeakReference< css::lang::XEventListener> m_xListener;
+    public:
+        OEventListenerHelper(const css::uno::Reference< css::lang::XEventListener>& _rxListener);
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+    };
+
+}   // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_EVTLISTENERHLP_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/evtmethodhelper.hxx b/include/comphelper/evtmethodhelper.hxx
new file mode 100644
index 000000000..f420b1869
--- /dev/null
+++ b/include/comphelper/evtmethodhelper.hxx
@@ -0,0 +1,32 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <com/sun/star/uno/Sequence.h>
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper
+{
+COMPHELPER_DLLPUBLIC css::uno::Sequence<OUString>
+getEventMethodsForType(const css::uno::Type& type);
+
+} // namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/extract.hxx b/include/comphelper/extract.hxx
new file mode 100644
index 000000000..c8ab9c6e6
--- /dev/null
+++ b/include/comphelper/extract.hxx
@@ -0,0 +1,113 @@
+/* -*- 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_COMPHELPER_EXTRACT_HXX
+#define INCLUDED_COMPHELPER_EXTRACT_HXX
+
+#include <sal/config.h>
+
+#include <cassert>
+
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/uno/TypeClass.hpp>
+#include <com/sun/star/uno/Type.h>
+#include <com/sun/star/uno/Any.hxx>
+
+namespace cppu
+{
+/**
+ * Sets enum from int32 value.  This function does NOT check for valid enum values!
+ *
+ * @param nEnum         int32 enum value
+ * @param rType         enum type
+ * @return enum or empty any.
+ */
+inline css::uno::Any int2enum(sal_Int32 nEnum, const css::uno::Type& rType)
+{
+    assert(rType.getTypeClass() == css::uno::TypeClass_ENUM);
+    return css::uno::Any(&nEnum, rType);
+}
+
+/**
+ * Sets int32 from enum or int in any.
+ *
+ * @param[out] rnEnum   int32 enum value
+ * @param rAny          enum or int
+ * @retval true if enum or int value was set
+ * @retval false otherwise
+ */
+inline bool enum2int(sal_Int32& rnEnum, const css::uno::Any& rAny)
+{
+    if (rAny.getValueTypeClass() == css::uno::TypeClass_ENUM)
+    {
+        rnEnum = *static_cast<const sal_Int32*>(rAny.getValue());
+        return true;
+    }
+
+    return rAny >>= rnEnum;
+}
+
+/**
+ * Sets int32 from enum or int in any with additional typecheck
+ *
+ * @param[out] eRet     the enum value as int. If there is no enum of the given type
+ *                      a css::lang::IllegalArgumentException is thrown
+ * @param rAny          enum or int
+ * @throws css::lang::IllegalArgumentException
+ */
+template <typename E> inline void any2enum(E& eRet, const css::uno::Any& rAny)
+{
+    // check for typesafe enum
+    if (!(rAny >>= eRet))
+    {
+        // if not enum, maybe integer?
+        sal_Int32 nValue = 0;
+        if (!(rAny >>= nValue))
+            throw css::lang::IllegalArgumentException();
+
+        eRet = static_cast<E>(nValue);
+    }
+}
+
+/**
+ * Extracts a boolean either as a bool or an integer from
+ * an any. If there is no bool or integer inside the any
+ * a css::lang::IllegalArgumentException is thrown
+ *
+ * @throws css::lang::IllegalArgumentException
+ */
+inline bool any2bool(const css::uno::Any& rAny)
+{
+    bool b;
+    if (rAny >>= b)
+    {
+        return b;
+    }
+    else
+    {
+        sal_Int32 nValue = 0;
+        if (!(rAny >>= nValue))
+            throw css::lang::IllegalArgumentException();
+        return nValue != 0;
+    }
+}
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/fileformat.h b/include/comphelper/fileformat.h
new file mode 100644
index 000000000..7eabf5829
--- /dev/null
+++ b/include/comphelper/fileformat.h
@@ -0,0 +1,34 @@
+/* -*- 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_COMPHELPER_FILEFORMAT_H
+#define INCLUDED_COMPHELPER_FILEFORMAT_H
+
+/* file format versions *************************************************/
+
+#define SOFFICE_FILEFORMAT_31 3450
+#define SOFFICE_FILEFORMAT_40 3580
+#define SOFFICE_FILEFORMAT_50 5050
+#define SOFFICE_FILEFORMAT_60 6200
+#define SOFFICE_FILEFORMAT_8 6800
+#define SOFFICE_FILEFORMAT_CURRENT SOFFICE_FILEFORMAT_8
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/fileurl.hxx b/include/comphelper/fileurl.hxx
new file mode 100644
index 000000000..27ac6b576
--- /dev/null
+++ b/include/comphelper/fileurl.hxx
@@ -0,0 +1,36 @@
+/* -*- 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_COMPHELPER_FILEURL_HXX
+#define INCLUDED_COMPHELPER_FILEURL_HXX
+
+#include <sal/config.h>
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+
+namespace comphelper
+{
+// Return true iff url is an absolute URL of "file" scheme:
+COMPHELPER_DLLPUBLIC bool isFileUrl(OUString const& url);
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/flagguard.hxx b/include/comphelper/flagguard.hxx
new file mode 100644
index 000000000..14eee07a8
--- /dev/null
+++ b/include/comphelper/flagguard.hxx
@@ -0,0 +1,80 @@
+/* -*- 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_COMPHELPER_FLAGGUARD_HXX
+#define INCLUDED_COMPHELPER_FLAGGUARD_HXX
+
+#include <comphelper/scopeguard.hxx>
+#include <utility>
+
+namespace comphelper
+{
+
+    //= ValueRestorationGuard
+
+    // note: can't store the originalValue in a ValueRestorationGuard member,
+    // because it will be used from base class dtor
+    template <typename T> struct ValueRestorationGuard_Impl
+    {
+        T& rVal;
+        T const originalValue;
+        ValueRestorationGuard_Impl(T& i_valRef)
+            : rVal(i_valRef), originalValue(i_valRef) {}
+        void operator()()
+        {
+            rVal = originalValue;
+        }
+    };
+
+    template <typename T>
+    class ValueRestorationGuard : public ScopeGuard<ValueRestorationGuard_Impl<T>>
+    {
+    public:
+        template <typename T1>
+        ValueRestorationGuard(T& i_valRef, T1&& i_temporaryValue)
+            : ScopeGuard<ValueRestorationGuard_Impl<T>>(ValueRestorationGuard_Impl(i_valRef))
+        {
+            i_valRef = std::forward<T1>(i_temporaryValue);
+        }
+    };
+
+    typedef ValueRestorationGuard<bool> FlagRestorationGuard;
+
+    //= FlagGuard
+
+    // Guarantees that the flag is true within the scope of the guard, and is set to false after
+    // its destruction, regardless of initial flag value
+    class FlagGuard : public FlagRestorationGuard
+    {
+    public:
+        // Set flag to false before passing its reference to base class ctor, so that it would be
+        // reset back to false in base class dtor
+        explicit FlagGuard(bool& i_flagRef)
+            : FlagRestorationGuard((i_flagRef = false), true)
+        {
+        }
+    };
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_FLAGGUARD_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/genericpropertyset.hxx b/include/comphelper/genericpropertyset.hxx
new file mode 100644
index 000000000..2450ef047
--- /dev/null
+++ b/include/comphelper/genericpropertyset.hxx
@@ -0,0 +1,43 @@
+/* -*- 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_COMPHELPER_GENERICPROPERTYSET_HXX
+#define INCLUDED_COMPHELPER_GENERICPROPERTYSET_HXX
+
+#include <com/sun/star/uno/Reference.h>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::beans
+{
+class XPropertySet;
+}
+namespace comphelper
+{
+class PropertySetInfo;
+}
+
+namespace comphelper
+{
+COMPHELPER_DLLPUBLIC css::uno::Reference<css::beans::XPropertySet>
+GenericPropertySet_CreateInstance(PropertySetInfo* pInfo);
+}
+
+#endif // INCLUDED_COMPHELPER_GENERICPROPERTYSET_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/getexpandeduri.hxx b/include/comphelper/getexpandeduri.hxx
new file mode 100644
index 000000000..5b75c43d4
--- /dev/null
+++ b/include/comphelper/getexpandeduri.hxx
@@ -0,0 +1,42 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_GETEXPANDEDURI_HXX
+#define INCLUDED_COMPHELPER_GETEXPANDEDURI_HXX
+
+#include <sal/config.h>
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star::uno
+{
+class XComponentContext;
+}
+namespace com::sun::star::uno
+{
+template <typename> class Reference;
+}
+
+namespace comphelper
+{
+/**
+   A helper function to expand vnd.sun.star.expand URLs.
+
+   If the given URI is a vnd.sun.star.expand URL, it is expanded (using the
+   given component context's com.sun.star.util.theMacroExpander); otherwise it
+   is returned unchanged.
+*/
+COMPHELPER_DLLPUBLIC OUString getExpandedUri(
+    css::uno::Reference<css::uno::XComponentContext> const& context, OUString const& uri);
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/graphicmimetype.hxx b/include/comphelper/graphicmimetype.hxx
new file mode 100644
index 000000000..94a3cd3cd
--- /dev/null
+++ b/include/comphelper/graphicmimetype.hxx
@@ -0,0 +1,49 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_GMH_HXX
+#define INCLUDED_COMPHELPER_GMH_HXX
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+#include <vcl/salctype.hxx>
+
+#include <com/sun/star/uno/Reference.h>
+
+namespace com::sun::star::graphic
+{
+class XGraphic;
+}
+namespace com::sun::star::io
+{
+class XInputStream;
+}
+
+namespace comphelper
+{
+class COMPHELPER_DLLPUBLIC GraphicMimeTypeHelper
+{
+public:
+    static OUString GetMimeTypeForExtension(std::string_view rExt);
+    static OUString
+    GetMimeTypeForXGraphic(const css::uno::Reference<css::graphic::XGraphic>& xGraphic);
+    static OUString
+    GetMimeTypeForImageStream(const css::uno::Reference<css::io::XInputStream>& xInputStream);
+    static OUString GetMimeTypeForConvertDataFormat(ConvertDataFormat convertDataFormat);
+    static char const* GetExtensionForConvertDataFormat(ConvertDataFormat nFormat);
+};
+}
+
+#endif // INCLUDED_COMPHELPER_GMH_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/guarding.hxx b/include/comphelper/guarding.hxx
new file mode 100644
index 000000000..3bbf4ac71
--- /dev/null
+++ b/include/comphelper/guarding.hxx
@@ -0,0 +1,55 @@
+/* -*- 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_COMPHELPER_GUARDING_HXX
+#define INCLUDED_COMPHELPER_GUARDING_HXX
+
+namespace osl { class Mutex; }
+
+
+namespace comphelper
+{
+
+
+// = class MutexRelease -
+
+
+/** opposite of OGuard :)
+    (a mutex is released within the constructor and acquired within the destructor)
+    use only when you're sure the mutex is acquired !
+*/
+template <class MUTEX>
+class ORelease
+{
+    MUTEX&  m_rMutex;
+
+public:
+    ORelease(MUTEX& _rMutex) : m_rMutex(_rMutex) { _rMutex.release(); }
+    ~ORelease() { m_rMutex.acquire(); }
+};
+
+typedef ORelease< ::osl::Mutex >    MutexRelease;
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_GUARDING_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/hash.hxx b/include/comphelper/hash.hxx
new file mode 100644
index 000000000..54ab3a251
--- /dev/null
+++ b/include/comphelper/hash.hxx
@@ -0,0 +1,121 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_HASH_HXX
+#define INCLUDED_COMPHELPER_HASH_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/digest.h>
+
+#include <memory>
+#include <vector>
+
+namespace rtl {
+    class OUString;
+}
+
+namespace comphelper {
+
+enum class HashType
+{
+    MD5,
+    SHA1,
+    SHA256,
+    SHA512
+};
+
+const sal_uInt32 MD5_HASH_LENGTH = RTL_DIGEST_LENGTH_MD5;
+const sal_uInt32 SHA1_HASH_LENGTH = RTL_DIGEST_LENGTH_SHA1;
+const sal_uInt32 SHA256_HASH_LENGTH = 32;
+const sal_uInt32 SHA512_HASH_LENGTH = 64;
+
+struct HashImpl;
+
+class COMPHELPER_DLLPUBLIC Hash
+{
+private:
+    std::unique_ptr<HashImpl> mpImpl;
+
+public:
+
+    enum class IterCount
+    {
+        NONE,       /// Iteration count not added to hash iterations.
+        PREPEND,    /// Iteration count prepended to hash iterations.
+        APPEND      /// Iteration count appended to hash iterations.
+    };
+
+    Hash(HashType eType);
+    ~Hash();
+
+    void update(const unsigned char* pInput, size_t length);
+
+    std::vector<unsigned char> finalize();
+
+    static std::vector<unsigned char> calculateHash(const unsigned char* pInput, size_t length, HashType eType);
+
+    /** Calculate hash value with salt (pSalt,nSaltLen) prepended to password
+        (pInput,nLength) and repeated iterations run if nSpinCount>0.
+
+        This implements the algorithms as specified in
+        https://msdn.microsoft.com/en-us/library/dd920692 or
+        https://msdn.microsoft.com/en-us/library/dd924776 and
+        https://msdn.microsoft.com/en-us/library/dd925430
+
+        @param  pSalt
+                may be nullptr thus no salt prepended
+
+        @param  nSpinCount
+                If >0, repeat nSpinCount iterations. For each iteration, the
+                previous iteration's result plus a 4 byte value (0-based,
+                little endian) containing the number of the iteration prepended
+                or appended to the hash value is the input for the next
+                iteration.
+
+        @param  eIterCount
+                If IterCount::APPEND, append iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd920692
+                If IterCount::PREPEND, prepend iteration count as per
+                https://msdn.microsoft.com/en-us/library/dd924776 and
+                https://msdn.microsoft.com/en-us/library/dd925430
+                If IterCount::NONE, do not add the iteration count to hash
+                iterations.
+
+        @return the raw hash value
+     */
+    static std::vector<unsigned char> calculateHash(
+            const unsigned char* pInput, size_t nLength,
+            const unsigned char* pSalt, size_t nSaltLen,
+            sal_uInt32 nSpinCount,
+            IterCount eIterCount,
+            HashType eType);
+
+    /** Convenience function to calculate a salted hash with iterations.
+
+        @param  rPassword
+                UTF-16 encoded string, hashed byte-wise as unsigned char.
+
+        @param  rSaltValue
+                Salt that will be prepended to password data.
+     */
+    static std::vector<unsigned char> calculateHash(
+            const rtl::OUString& rPassword,
+            const std::vector<unsigned char>& rSaltValue,
+            sal_uInt32 nSpinCount,
+            IterCount eIterCount,
+            HashType eType);
+
+    size_t getLength() const;
+};
+
+}
+
+#endif // INCLUDED_COMPHELPER_HASH_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/indexedpropertyvalues.hxx b/include/comphelper/indexedpropertyvalues.hxx
new file mode 100644
index 000000000..5a5f3e8ba
--- /dev/null
+++ b/include/comphelper/indexedpropertyvalues.hxx
@@ -0,0 +1,55 @@
+/* -*- 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/.
+ */
+#pragma once
+
+#include <sal/config.h>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/container/XIndexContainer.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+#include <com/sun/star/uno/Sequence.h>
+#include <comphelper/comphelperdllapi.h>
+#include <cppuhelper/implbase.hxx>
+#include <vector>
+
+namespace comphelper
+{
+typedef std::vector<css::uno::Sequence<css::beans::PropertyValue>> IndexedPropertyValues;
+
+class COMPHELPER_DLLPUBLIC IndexedPropertyValuesContainer final
+    : public cppu::WeakImplHelper<css::container::XIndexContainer, css::lang::XServiceInfo>
+{
+public:
+    IndexedPropertyValuesContainer() noexcept;
+
+    // XIndexContainer
+    virtual void SAL_CALL insertByIndex(sal_Int32 nIndex, const css::uno::Any& aElement) override;
+    virtual void SAL_CALL removeByIndex(sal_Int32 nIndex) override;
+
+    // XIndexReplace
+    virtual void SAL_CALL replaceByIndex(sal_Int32 nIndex, const css::uno::Any& aElement) override;
+
+    // XIndexAccess
+    virtual sal_Int32 SAL_CALL getCount() override;
+    virtual css::uno::Any SAL_CALL getByIndex(sal_Int32 nIndex) override;
+
+    // XElementAccess
+    virtual css::uno::Type SAL_CALL getElementType() override;
+    virtual sal_Bool SAL_CALL hasElements() override;
+
+    //XServiceInfo
+    virtual OUString SAL_CALL getImplementationName() override;
+    virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override;
+
+private:
+    IndexedPropertyValues maProperties;
+};
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/interaction.hxx b/include/comphelper/interaction.hxx
new file mode 100644
index 000000000..0f783e946
--- /dev/null
+++ b/include/comphelper/interaction.hxx
@@ -0,0 +1,119 @@
+/* -*- 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_COMPHELPER_INTERACTION_HXX
+#define INCLUDED_COMPHELPER_INTERACTION_HXX
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/task/XInteractionApprove.hpp>
+#include <com/sun/star/task/XInteractionDisapprove.hpp>
+#include <com/sun/star/task/XInteractionAbort.hpp>
+#include <com/sun/star/task/XInteractionRetry.hpp>
+#include <com/sun/star/task/XInteractionRequest.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <vector>
+
+
+namespace comphelper
+{
+
+
+    //= OInteraction
+
+    /** template for instantiating concrete interaction handlers<p/>
+        the template argument must be an interface derived from XInteractionContinuation
+    */
+    template <class INTERACTION>
+    class OInteraction
+            : public ::cppu::WeakImplHelper< INTERACTION >
+    {
+    public:
+        OInteraction() : m_bSelected(false) {}
+
+        /// determines whether or not this handler was selected
+        bool    wasSelected() const { return m_bSelected; }
+
+        // XInteractionContinuation
+        virtual void SAL_CALL select() override;
+    private:
+        bool    m_bSelected : 1;    /// indicates if the select event occurred
+    };
+
+
+    template <class INTERACTION>
+    void SAL_CALL OInteraction< INTERACTION >::select(  )
+    {
+        m_bSelected = true;
+    }
+
+
+    //= OInteractionApprove
+
+    typedef OInteraction< css::task::XInteractionApprove > OInteractionApprove;
+
+
+    //= OInteractionDisapprove
+
+    typedef OInteraction< css::task::XInteractionDisapprove >  OInteractionDisapprove;
+
+
+    //= OInteractionAbort
+
+    typedef OInteraction< css::task::XInteractionAbort >   OInteractionAbort;
+
+
+    //= OInteractionRetry
+
+    typedef OInteraction< css::task::XInteractionRetry >   OInteractionRetry;
+
+
+    //= OInteractionRequest
+
+    typedef ::cppu::WeakImplHelper <   css::task::XInteractionRequest
+                                   >   OInteractionRequest_Base;
+    /** implements an interaction request (com.sun.star.task::XInteractionRequest)<p/>
+        at run time, you can freely add any interaction continuation objects
+    */
+    class COMPHELPER_DLLPUBLIC OInteractionRequest final : public OInteractionRequest_Base
+    {
+        css::uno::Any const
+                    m_aRequest;         /// the request we represent
+        std::vector< css::uno::Reference< css::task::XInteractionContinuation > >
+                    m_aContinuations;   /// all registered continuations
+
+    public:
+        OInteractionRequest(css::uno::Any aRequestDescription);
+        OInteractionRequest(css::uno::Any aRequestDescription,
+            std::vector<css::uno::Reference<css::task::XInteractionContinuation>>&& rContinuations);
+
+        /// add a new continuation
+        void addContinuation(const css::uno::Reference< css::task::XInteractionContinuation >& _rxContinuation);
+
+    // XInteractionRequest
+        virtual css::uno::Any SAL_CALL getRequest(  ) override;
+        virtual css::uno::Sequence< css::uno::Reference< css::task::XInteractionContinuation > > SAL_CALL getContinuations(  ) override;
+    };
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_INTERACTION_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/interfacecontainer2.hxx b/include/comphelper/interfacecontainer2.hxx
new file mode 100644
index 000000000..3df7c71d4
--- /dev/null
+++ b/include/comphelper/interfacecontainer2.hxx
@@ -0,0 +1,290 @@
+/* -*- 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_COMPHELPER_INTERFACECONTAINER2_H
+#define INCLUDED_COMPHELPER_INTERFACECONTAINER2_H
+
+#include <sal/config.h>
+
+#include <vector>
+
+#include <com/sun/star/lang/EventObject.hpp>
+
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::uno { class XInterface; }
+namespace osl { class Mutex; }
+
+namespace comphelper
+{
+
+namespace detail {
+
+    /**
+      This is here to optimise space in the common case that there are zero or one
+      listeners.
+    */
+    union element_alias2
+    {
+        std::vector< css::uno::Reference< css::uno::XInterface > > *pAsVector;
+        css::uno::XInterface * pAsInterface;
+        element_alias2() : pAsInterface(nullptr) {}
+    };
+
+}
+
+
+class OInterfaceContainerHelper2;
+/**
+  This is the iterator of an OInterfaceContainerHelper2. Typically
+  one constructs an instance on the stack for one firing session.
+  It is not allowed to assign or copy an instance of this class.
+
+  @see OInterfaceContainerHelper2
+ */
+class COMPHELPER_DLLPUBLIC OInterfaceIteratorHelper2
+{
+public:
+    /**
+       Create an iterator over the elements of the container. The iterator
+       copies the elements of the container. A change to the container
+       during the lifetime of an iterator is allowed and does not
+       affect the iterator-instance. The iterator and the container take cares
+       themself for concurrent access, no additional guarding is necessary.
+
+       Remark: The copy is on demand. The iterator copy the elements only if the container
+       change the contents. It is not allowed to destroy the container as long
+       as an iterator exist.
+
+       @param rCont the container of the elements.
+     */
+    OInterfaceIteratorHelper2( OInterfaceContainerHelper2 & rCont );
+
+    /**
+      Releases the connection to the container.
+     */
+    ~OInterfaceIteratorHelper2();
+
+    /** Return true, if there are more elements in the iterator. */
+    bool hasMoreElements() const
+        { return nRemain != 0; }
+    /** Return the next element of the iterator. Calling this method if
+        hasMoreElements() has returned false, is an error. Cast the
+        returned pointer to the
+     */
+    css::uno::XInterface * next();
+
+    /** Removes the current element (the last one returned by next())
+        from the underlying container. Calling this method before
+        next() has been called or calling it twice with no next()
+        inbetween is an error.
+    */
+    void remove();
+
+private:
+    OInterfaceContainerHelper2 & rCont;
+    detail::element_alias2       aData;
+    sal_Int32                    nRemain;
+    bool                         bIsList;
+
+    OInterfaceIteratorHelper2( const OInterfaceIteratorHelper2 & ) = delete;
+    OInterfaceIteratorHelper2 &  operator = ( const OInterfaceIteratorHelper2 & ) = delete;
+};
+
+
+/**
+  A container of interfaces. To access the elements use an iterator.
+  This implementation is thread-safe.
+
+  This is a copy of the code at include/cppuhelper/interfacecontainer.h,
+  Except that it uses a std::vector instead of a Sequence for the mutable listener
+  list, which provides far better performance.
+
+  @see OInterfaceIteratorHelper2
+ */
+class COMPHELPER_DLLPUBLIC OInterfaceContainerHelper2
+{
+public:
+    /**
+       Create an interface container.
+
+       @param rMutex    the mutex to protect multi thread access.
+       The lifetime must be longer than the lifetime
+       of this object.
+     */
+    OInterfaceContainerHelper2( ::osl::Mutex & rMutex );
+    /**
+      Release all interfaces. All iterators must be destroyed before
+      the container is destructed.
+     */
+    ~OInterfaceContainerHelper2();
+    /**
+      Return the number of Elements in the container. Only useful if you have acquired
+      the mutex.
+     */
+    sal_Int32 getLength() const;
+
+    /**
+      Return all interfaces added to this container.
+     **/
+    std::vector< css::uno::Reference< css::uno::XInterface > > getElements() const;
+
+    /** Inserts an element into the container.  The position is not specified, thus it is not
+        specified in which order events are fired.
+
+        @attention
+        If you add the same interface more than once, then it will be added to the elements list
+        more than once and thus if you want to remove that interface from the list, you have to call
+        removeInterface() the same number of times.
+        In the latter case, you will also get events fired more than once (if the interface is a
+        listener interface).
+
+        @param rxIFace
+               interface to be added; it is allowed to insert null or
+               the same interface more than once
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 addInterface( const css::uno::Reference< css::uno::XInterface > & rxIFace );
+    /** Removes an element from the container.  It uses interface equality to remove the interface.
+
+        @param rxIFace
+               interface to be removed
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 removeInterface( const css::uno::Reference< css::uno::XInterface > & rxIFace );
+    /** Return an interface by index */
+    css::uno::Reference< css::uno::XInterface > getInterface(sal_Int32 nIndex) const;
+    /**
+      Call disposing on all object in the container that
+      support XEventListener. Then clear the container.
+     */
+    void disposeAndClear( const css::lang::EventObject & rEvt );
+    /**
+      Clears the container without calling disposing().
+     */
+    void clear();
+
+    /** Executes a functor for each contained listener of specified type, e.g.
+        <code>forEach<awt::XPaintListener>(...</code>.
+
+        If a css::lang::DisposedException occurs which relates to
+        the called listener, then that listener is removed from the container.
+
+        @tparam ListenerT listener type
+        @tparam FuncT unary functor type, let your compiler deduce this for you
+        @param func unary functor object expecting an argument of type
+                    css::uno::Reference<ListenerT>
+    */
+    template <typename ListenerT, typename FuncT>
+    inline void forEach( FuncT const& func );
+
+    /** Calls a UNO listener method for each contained listener.
+
+        The listener method must take a single argument of type EventT,
+        and return <code>void</code>.
+
+        If a css::lang::DisposedException occurs which relates to
+        the called listener, then that listener is removed from the container.
+
+        @tparam ListenerT UNO event listener type, let your compiler deduce this for you
+        @tparam EventT event type, let your compiler deduce this for you
+        @param NotificationMethod
+            Pointer to a method of a ListenerT interface.
+        @param Event
+            Event to notify to all contained listeners
+
+        Example:
+@code
+    awt::PaintEvent aEvent( static_cast< cppu::OWeakObject* >( this ), ... );
+    listeners.notifyEach( &XPaintListener::windowPaint, aEvent );
+@endcode
+    */
+    template< typename ListenerT, typename EventT >
+    inline void notifyEach( void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& ), const EventT& Event );
+
+private:
+friend class OInterfaceIteratorHelper2;
+    /**
+      bIsList == TRUE -> aData.pAsVector of type vector< XInterfaceSequence >,
+      otherwise aData.pAsInterface == of type (XEventListener *)
+     */
+    detail::element_alias2  aData;
+    ::osl::Mutex &          rMutex;
+    /** TRUE -> used by an iterator. */
+    bool                    bInUse;
+    /** TRUE -> aData.pAsVector is of type Sequence< XInterfaceSequence >. */
+    bool                    bIsList;
+
+    OInterfaceContainerHelper2( const OInterfaceContainerHelper2 & ) = delete;
+    OInterfaceContainerHelper2 & operator = ( const OInterfaceContainerHelper2 & ) = delete;
+
+    /*
+      Duplicate content of the container and release the old one without destroying.
+      The mutex must be locked and the memberbInUse must be true.
+     */
+    void copyAndResetInUse();
+
+private:
+    template< typename ListenerT, typename EventT >
+    class NotifySingleListener
+    {
+    private:
+        typedef void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& );
+        NotificationMethod const m_pMethod;
+        const EventT&            m_rEvent;
+    public:
+        NotifySingleListener( NotificationMethod method, const EventT& event ) : m_pMethod( method ), m_rEvent( event ) { }
+
+        void operator()( const css::uno::Reference<ListenerT>& listener ) const
+        {
+            (listener.get()->*m_pMethod)( m_rEvent );
+        }
+    };
+};
+
+template <typename ListenerT, typename FuncT>
+inline void OInterfaceContainerHelper2::forEach( FuncT const& func )
+{
+    OInterfaceIteratorHelper2 iter( *this );
+    while (iter.hasMoreElements()) {
+        css::uno::Reference<ListenerT> const xListener( iter.next(), css::uno::UNO_QUERY );
+        if (xListener.is()) {
+            try {
+                func( xListener );
+            }
+            catch (css::lang::DisposedException const& exc) {
+                if (exc.Context == xListener)
+                    iter.remove();
+            }
+        }
+    }
+}
+
+template< typename ListenerT, typename EventT >
+inline void OInterfaceContainerHelper2::notifyEach( void ( SAL_CALL ListenerT::*NotificationMethod )( const EventT& ), const EventT& Event )
+{
+    forEach< ListenerT, NotifySingleListener< ListenerT, EventT > >( NotifySingleListener< ListenerT, EventT >( NotificationMethod, Event ) );
+}
+
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/interfacecontainer3.hxx b/include/comphelper/interfacecontainer3.hxx
new file mode 100644
index 000000000..4b3d44bab
--- /dev/null
+++ b/include/comphelper/interfacecontainer3.hxx
@@ -0,0 +1,379 @@
+/* -*- 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 .
+ */
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <o3tl/cow_wrapper.hxx>
+#include <vector>
+
+namespace com::sun::star::uno
+{
+class XInterface;
+}
+namespace osl
+{
+class Mutex;
+}
+
+namespace comphelper
+{
+template <class ListenerT> class OInterfaceContainerHelper3;
+/**
+  This is the iterator of an OInterfaceContainerHelper3. Typically
+  one constructs an instance on the stack for one firing session.
+  It is not allowed to assign or copy an instance of this class.
+
+  @tparam ListenerT UNO event listener type
+  @see OInterfaceContainerHelper3
+ */
+template <class ListenerT> class OInterfaceIteratorHelper3
+{
+public:
+    /**
+       Create an iterator over the elements of the container. The iterator
+       copies the elements of the container. A change to the container
+       during the lifetime of an iterator is allowed and does not
+       affect the iterator-instance. The iterator and the container take cares
+       themself for concurrent access, no additional guarding is necessary.
+
+       Remark: The copy is on demand. The iterator copy the elements only if the container
+       change the contents...
+
+       @param rCont the container of the elements.
+     */
+    OInterfaceIteratorHelper3(OInterfaceContainerHelper3<ListenerT>& rCont_)
+        : rCont(rCont_)
+        , maData(rCont.maData)
+        , nRemain(maData->size())
+    {
+    }
+
+    /** Return true, if there are more elements in the iterator. */
+    bool hasMoreElements() const { return nRemain != 0; }
+    /** Return the next element of the iterator. Calling this method if
+        hasMoreElements() has returned false, is an error.
+     */
+    css::uno::Reference<ListenerT> const& next();
+
+    /** Removes the current element (the last one returned by next())
+        from the underlying container. Calling this method before
+        next() has been called or calling it twice with no next()
+        in between is an error.
+    */
+    void remove();
+
+private:
+    OInterfaceContainerHelper3<ListenerT>& rCont;
+    o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                      o3tl::ThreadSafeRefCountingPolicy>
+        maData;
+    sal_Int32 nRemain;
+
+    OInterfaceIteratorHelper3(const OInterfaceIteratorHelper3&) = delete;
+    OInterfaceIteratorHelper3& operator=(const OInterfaceIteratorHelper3&) = delete;
+};
+
+template <class ListenerT>
+const css::uno::Reference<ListenerT>& OInterfaceIteratorHelper3<ListenerT>::next()
+{
+    nRemain--;
+    return (*maData)[nRemain];
+}
+
+template <class ListenerT> void OInterfaceIteratorHelper3<ListenerT>::remove()
+{
+    rCont.removeInterface((*maData)[nRemain]);
+}
+
+/**
+  A container of interfaces. To access the elements use an iterator.
+  This implementation is thread-safe.
+
+  This is a copy of the code at include/comphelper/interfacecontainer2.hxx,
+  except that it is templatized on the type of the listener, which allows
+  some parts of the code to avoid doing an UNO_QUERY that can be expensive
+  in bulk.
+
+  @tparam ListenerT UNO event listener type
+  @see OInterfaceIteratorHelper
+ */
+template <class ListenerT> class OInterfaceContainerHelper3
+{
+public:
+    /**
+       Create an interface container.
+
+       @param rMutex    the mutex to protect multi thread access.
+       The lifetime must be longer than the lifetime
+       of this object.
+     */
+    inline OInterfaceContainerHelper3(::osl::Mutex& rMutex_);
+
+    /**
+      Return the number of Elements in the container. Only useful if you have acquired
+      the mutex.
+     */
+    sal_Int32 getLength() const;
+
+    /**
+      Return all interfaces added to this container.
+     **/
+    std::vector<css::uno::Reference<ListenerT>> getElements() const;
+
+    /** Inserts an element into the container.  The position is not specified, thus it is not
+        specified in which order events are fired.
+
+        @attention
+        If you add the same interface more than once, then it will be added to the elements list
+        more than once and thus if you want to remove that interface from the list, you have to call
+        removeInterface() the same number of times.
+        In the latter case, you will also get events fired more than once (if the interface is a
+        listener interface).
+
+        @param rxIFace
+               interface to be added; it is allowed to insert
+               the same interface more than once
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 addInterface(const css::uno::Reference<ListenerT>& rxIFace);
+    /** Removes an element from the container.  It uses interface equality to remove the interface.
+
+        @param rxIFace
+               interface to be removed
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 removeInterface(const css::uno::Reference<ListenerT>& rxIFace);
+    /** Return an interface by index
+    */
+    const css::uno::Reference<ListenerT>& getInterface(sal_Int32 nIndex) const;
+    /**
+      Call disposing on all object in the container that
+      support XEventListener. Then clear the container.
+     */
+    void disposeAndClear(const css::lang::EventObject& rEvt);
+    /**
+      Clears the container without calling disposing().
+     */
+    void clear();
+
+    /** Executes a functor for each contained listener of specified type, e.g.
+        <code>forEach<awt::XPaintListener>(...</code>.
+
+        If a css::lang::DisposedException occurs which relates to
+        the called listener, then that listener is removed from the container.
+
+        @tparam FuncT unary functor type, let your compiler deduce this for you
+        @param func unary functor object expecting an argument of type
+                    css::uno::Reference<ListenerT>
+    */
+    template <typename FuncT> inline void forEach(FuncT const& func);
+
+    /** Calls a UNO listener method for each contained listener.
+
+        The listener method must take a single argument of type EventT,
+        and return <code>void</code>.
+
+        If a css::lang::DisposedException occurs which relates to
+        the called listener, then that listener is removed from the container.
+
+        @tparam EventT event type, let your compiler deduce this for you
+        @param NotificationMethod
+            Pointer to a method of a ListenerT interface.
+        @param Event
+            Event to notify to all contained listeners
+
+        Example:
+@code
+    awt::PaintEvent aEvent( static_cast< cppu::OWeakObject* >( this ), ... );
+    listeners.notifyEach( &XPaintListener::windowPaint, aEvent );
+@endcode
+    */
+    template <typename EventT>
+    inline void notifyEach(void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&),
+                           const EventT& Event);
+
+private:
+    friend class OInterfaceIteratorHelper3<ListenerT>;
+    o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                      o3tl::ThreadSafeRefCountingPolicy>
+        maData;
+    ::osl::Mutex& mrMutex;
+    OInterfaceContainerHelper3(const OInterfaceContainerHelper3&) = delete;
+    OInterfaceContainerHelper3& operator=(const OInterfaceContainerHelper3&) = delete;
+
+    static o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                             o3tl::ThreadSafeRefCountingPolicy>&
+    DEFAULT()
+    {
+        static o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                                 o3tl::ThreadSafeRefCountingPolicy>
+            SINGLETON;
+        return SINGLETON;
+    }
+
+private:
+    template <typename EventT> class NotifySingleListener
+    {
+    private:
+        typedef void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&);
+        NotificationMethod const m_pMethod;
+        const EventT& m_rEvent;
+
+    public:
+        NotifySingleListener(NotificationMethod method, const EventT& event)
+            : m_pMethod(method)
+            , m_rEvent(event)
+        {
+        }
+
+        void operator()(const css::uno::Reference<ListenerT>& listener) const
+        {
+            (listener.get()->*m_pMethod)(m_rEvent);
+        }
+    };
+};
+
+template <class T>
+inline OInterfaceContainerHelper3<T>::OInterfaceContainerHelper3(::osl::Mutex& rMutex_)
+    : maData(OInterfaceContainerHelper3<T>::DEFAULT())
+    , mrMutex(rMutex_)
+{
+}
+
+template <class T>
+template <typename FuncT>
+inline void OInterfaceContainerHelper3<T>::forEach(FuncT const& func)
+{
+    OInterfaceIteratorHelper3<T> iter(*this);
+    while (iter.hasMoreElements())
+    {
+        auto xListener = iter.next();
+        try
+        {
+            func(xListener);
+        }
+        catch (css::lang::DisposedException const& exc)
+        {
+            if (exc.Context == xListener)
+                iter.remove();
+        }
+    }
+}
+
+template <class ListenerT>
+template <typename EventT>
+inline void OInterfaceContainerHelper3<ListenerT>::notifyEach(
+    void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&), const EventT& Event)
+{
+    forEach<NotifySingleListener<EventT>>(NotifySingleListener<EventT>(NotificationMethod, Event));
+}
+
+template <class ListenerT> sal_Int32 OInterfaceContainerHelper3<ListenerT>::getLength() const
+{
+    osl::MutexGuard aGuard(mrMutex);
+    return maData->size();
+}
+
+template <class ListenerT>
+std::vector<css::uno::Reference<ListenerT>>
+OInterfaceContainerHelper3<ListenerT>::getElements() const
+{
+    std::vector<css::uno::Reference<ListenerT>> rVec;
+    osl::MutexGuard aGuard(mrMutex);
+    rVec = *maData;
+    return rVec;
+}
+
+template <class ListenerT>
+sal_Int32
+OInterfaceContainerHelper3<ListenerT>::addInterface(const css::uno::Reference<ListenerT>& rListener)
+{
+    assert(rListener.is());
+    osl::MutexGuard aGuard(mrMutex);
+
+    maData->push_back(rListener);
+    return maData->size();
+}
+
+template <class ListenerT>
+sal_Int32 OInterfaceContainerHelper3<ListenerT>::removeInterface(
+    const css::uno::Reference<ListenerT>& rListener)
+{
+    assert(rListener.is());
+    osl::MutexGuard aGuard(mrMutex);
+
+    // It is not valid to compare the pointer directly, but it's faster.
+    auto it = std::find_if(maData->begin(), maData->end(),
+                           [&rListener](const css::uno::Reference<css::uno::XInterface>& rItem) {
+                               return rItem.get() == rListener.get();
+                           });
+
+    // interface not found, use the correct compare method
+    if (it == maData->end())
+        it = std::find(maData->begin(), maData->end(), rListener);
+
+    if (it != maData->end())
+        maData->erase(it);
+
+    return maData->size();
+}
+
+template <class ListenerT>
+const css::uno::Reference<ListenerT>&
+OInterfaceContainerHelper3<ListenerT>::getInterface(sal_Int32 nIndex) const
+{
+    osl::MutexGuard aGuard(mrMutex);
+
+    return (*maData)[nIndex];
+}
+
+template <class ListenerT>
+void OInterfaceContainerHelper3<ListenerT>::disposeAndClear(const css::lang::EventObject& rEvt)
+{
+    osl::ClearableMutexGuard aGuard(mrMutex);
+    OInterfaceIteratorHelper3<ListenerT> aIt(*this);
+    maData->clear();
+    aGuard.clear();
+    while (aIt.hasMoreElements())
+    {
+        try
+        {
+            aIt.next()->disposing(rEvt);
+        }
+        catch (css::uno::RuntimeException&)
+        {
+            // be robust, if e.g. a remote bridge has disposed already.
+            // there is no way to delegate the error to the caller :o(.
+        }
+    }
+}
+
+template <class ListenerT> void OInterfaceContainerHelper3<ListenerT>::clear()
+{
+    osl::MutexGuard aGuard(mrMutex);
+    maData->clear();
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/interfacecontainer4.hxx b/include/comphelper/interfacecontainer4.hxx
new file mode 100644
index 000000000..bdd6a6b60
--- /dev/null
+++ b/include/comphelper/interfacecontainer4.hxx
@@ -0,0 +1,401 @@
+/* -*- 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 .
+ */
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/lang/EventObject.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <o3tl/cow_wrapper.hxx>
+#include <mutex>
+#include <vector>
+
+namespace com::sun::star::uno
+{
+class XInterface;
+}
+
+namespace comphelper
+{
+template <class ListenerT> class OInterfaceContainerHelper4;
+/**
+  This is the iterator of an OInterfaceContainerHelper4. Typically
+  one constructs an instance on the stack for one firing session.
+  It is not allowed to assign or copy an instance of this class.
+
+  @tparam ListenerT UNO event listener type
+  @see OInterfaceContainerHelper4
+ */
+template <class ListenerT> class OInterfaceIteratorHelper4
+{
+public:
+    /**
+       Create an iterator over the elements of the container. The iterator
+       copies the elements of the container. A change to the container
+       during the lifetime of an iterator is allowed and does not
+       affect the iterator-instance. The iterator and the container take cares
+       themself for concurrent access, no additional guarding is necessary.
+
+       Remark: The copy is on demand. The iterator copy the elements only if the container
+       change the contents...
+
+       @param rCont the container of the elements.
+       @param rGuard
+            this parameter only here to make that this container is accessed while locked
+     */
+    OInterfaceIteratorHelper4(std::unique_lock<std::mutex>& /*rGuard*/,
+                              OInterfaceContainerHelper4<ListenerT>& rCont_)
+        : rCont(rCont_)
+        , maData(rCont.maData)
+        // const_cast so we don't trigger make_unique via o3tl::cow_wrapper::operator->
+        , nRemain(std::as_const(maData)->size())
+    {
+    }
+
+    /** Return true, if there are more elements in the iterator. */
+    bool hasMoreElements() const { return nRemain != 0; }
+    /** Return the next element of the iterator. Calling this method if
+        hasMoreElements() has returned false, is an error.
+     */
+    css::uno::Reference<ListenerT> const& next();
+
+    /** Removes the current element (the last one returned by next())
+        from the underlying container. Calling this method before
+        next() has been called or calling it twice with no next()
+        in between is an error.
+        @param rGuard
+            this parameter only here to make that this container is accessed while locked
+    */
+    void remove(::std::unique_lock<::std::mutex>& rGuard);
+
+private:
+    OInterfaceContainerHelper4<ListenerT>& rCont;
+    o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                      o3tl::ThreadSafeRefCountingPolicy>
+        maData;
+    sal_Int32 nRemain;
+
+    OInterfaceIteratorHelper4(const OInterfaceIteratorHelper4&) = delete;
+    OInterfaceIteratorHelper4& operator=(const OInterfaceIteratorHelper4&) = delete;
+};
+
+template <class ListenerT>
+const css::uno::Reference<ListenerT>& OInterfaceIteratorHelper4<ListenerT>::next()
+{
+    nRemain--;
+    return (*std::as_const(maData))[nRemain];
+}
+
+template <class ListenerT>
+void OInterfaceIteratorHelper4<ListenerT>::remove(::std::unique_lock<::std::mutex>& rGuard)
+{
+    rCont.removeInterface(rGuard, (*std::as_const(maData))[nRemain]);
+}
+
+/**
+  A container of interfaces. To access the elements use an iterator.
+  This implementation is thread-safe.
+
+  This is a copy of the code at include/comphelper/interfacecontainer3.hxx,
+  except that it (a) uses std::mutex instead of osl::Mutex and (b) does not
+  store a reference to the mutex, but relies on the calling class to take
+  a lock around using it.
+
+  @tparam ListenerT UNO event listener type
+  @see OInterfaceIteratorHelper
+ */
+template <class ListenerT> class OInterfaceContainerHelper4
+{
+public:
+    OInterfaceContainerHelper4();
+
+    /**
+      Return the number of Elements in the container. Only useful if you have acquired
+      the mutex.
+      @param rGuard
+        this parameter only here to make that this container is accessed while locked
+     */
+    sal_Int32 getLength(std::unique_lock<std::mutex>& rGuard) const;
+
+    /**
+      Return all interfaces added to this container.
+      @param rGuard
+          this parameter only here to make that this container is accessed while locked
+     **/
+    std::vector<css::uno::Reference<ListenerT>>
+    getElements(std::unique_lock<std::mutex>& rGuard) const;
+
+    /** Inserts an element into the container.  The position is not specified, thus it is not
+        specified in which order events are fired.
+
+        @attention
+        If you add the same interface more than once, then it will be added to the elements list
+        more than once and thus if you want to remove that interface from the list, you have to call
+        removeInterface() the same number of times.
+        In the latter case, you will also get events fired more than once (if the interface is a
+        listener interface).
+
+        @param rxIFace
+               interface to be added; it is allowed to insert
+               the same interface more than once
+        @param rGuard
+            this parameter only here to make that this container is accessed while locked
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 addInterface(std::unique_lock<std::mutex>& rGuard,
+                           const css::uno::Reference<ListenerT>& rxIFace);
+    /** Removes an element from the container.  It uses interface equality to remove the interface.
+
+        @param rxIFace
+               interface to be removed
+        @param rGuard
+               this parameter only here to make that this container is accessed while locked
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 removeInterface(std::unique_lock<std::mutex>& rGuard,
+                              const css::uno::Reference<ListenerT>& rxIFace);
+    /**
+      Call disposing on all object in the container that
+      support XEventListener. Then clear the container.
+      The guard is unlock()'ed before calling the listeners.
+     */
+    void disposeAndClear(::std::unique_lock<::std::mutex>& rGuard,
+                         const css::lang::EventObject& rEvt);
+    /**
+      Clears the container without calling disposing().
+        @param rGuard
+            this parameter only here to make that this container is accessed while locked
+     */
+    void clear(::std::unique_lock<::std::mutex>& rGuard);
+
+    /** Executes a functor for each contained listener of specified type, e.g.
+        <code>forEach<awt::XPaintListener>(...</code>.
+
+        If a css::lang::DisposedException occurs which relates to
+        the called listener, then that listener is removed from the container.
+
+        @tparam FuncT unary functor type, let your compiler deduce this for you
+        @param func unary functor object expecting an argument of type
+                    css::uno::Reference<ListenerT>
+        @param rGuard
+            this parameter only here to make that this container is accessed while locked
+    */
+    template <typename FuncT>
+    inline void forEach(std::unique_lock<std::mutex>& rGuard, FuncT const& func);
+
+    /** Calls a UNO listener method for each contained listener.
+
+        The listener method must take a single argument of type EventT,
+        and return <code>void</code>.
+
+        If a css::lang::DisposedException occurs which relates to
+        the called listener, then that listener is removed from the container.
+
+        @tparam EventT event type, let your compiler deduce this for you
+        @param NotificationMethod
+            Pointer to a method of a ListenerT interface.
+        @param Event
+            Event to notify to all contained listeners
+        @param rGuard
+            this parameter only here to make that this container is accessed while locked
+
+        Example:
+@code
+    awt::PaintEvent aEvent( static_cast< cppu::OWeakObject* >( this ), ... );
+    listeners.notifyEach( &XPaintListener::windowPaint, aEvent );
+@endcode
+    */
+    template <typename EventT>
+    inline void notifyEach(std::unique_lock<std::mutex>& rGuard,
+                           void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&),
+                           const EventT& Event);
+
+private:
+    friend class OInterfaceIteratorHelper4<ListenerT>;
+    o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                      o3tl::ThreadSafeRefCountingPolicy>
+        maData;
+    OInterfaceContainerHelper4(const OInterfaceContainerHelper4&) = delete;
+    OInterfaceContainerHelper4& operator=(const OInterfaceContainerHelper4&) = delete;
+
+    static o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                             o3tl::ThreadSafeRefCountingPolicy>&
+    DEFAULT()
+    {
+        static o3tl::cow_wrapper<std::vector<css::uno::Reference<ListenerT>>,
+                                 o3tl::ThreadSafeRefCountingPolicy>
+            SINGLETON;
+        return SINGLETON;
+    }
+
+private:
+    template <typename EventT> class NotifySingleListener
+    {
+    private:
+        typedef void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&);
+        NotificationMethod const m_pMethod;
+        const EventT& m_rEvent;
+
+    public:
+        NotifySingleListener(NotificationMethod method, const EventT& event)
+            : m_pMethod(method)
+            , m_rEvent(event)
+        {
+        }
+
+        void operator()(const css::uno::Reference<ListenerT>& listener) const
+        {
+            (listener.get()->*m_pMethod)(m_rEvent);
+        }
+    };
+};
+
+template <class T>
+inline OInterfaceContainerHelper4<T>::OInterfaceContainerHelper4()
+    : maData(OInterfaceContainerHelper4<T>::DEFAULT())
+{
+}
+
+template <class T>
+template <typename FuncT>
+inline void OInterfaceContainerHelper4<T>::forEach(std::unique_lock<std::mutex>& rGuard,
+                                                   FuncT const& func)
+{
+    if (std::as_const(maData)->size() == 0)
+    {
+        return;
+    }
+    maData.make_unique(); // so we can iterate over the data without holding the lock
+    OInterfaceIteratorHelper4<T> iter(rGuard, *this);
+    rGuard.unlock();
+    while (iter.hasMoreElements())
+    {
+        auto xListener = iter.next();
+        try
+        {
+            func(xListener);
+        }
+        catch (css::lang::DisposedException const& exc)
+        {
+            if (exc.Context == xListener)
+            {
+                rGuard.lock();
+                iter.remove(rGuard);
+                rGuard.unlock();
+            }
+        }
+    }
+    rGuard.lock();
+}
+
+template <class ListenerT>
+template <typename EventT>
+inline void OInterfaceContainerHelper4<ListenerT>::notifyEach(
+    std::unique_lock<std::mutex>& rGuard,
+    void (SAL_CALL ListenerT::*NotificationMethod)(const EventT&), const EventT& Event)
+{
+    forEach<NotifySingleListener<EventT>>(rGuard,
+                                          NotifySingleListener<EventT>(NotificationMethod, Event));
+}
+
+template <class ListenerT>
+sal_Int32
+OInterfaceContainerHelper4<ListenerT>::getLength(std::unique_lock<std::mutex>& /*rGuard*/) const
+{
+    return maData->size();
+}
+
+template <class ListenerT>
+std::vector<css::uno::Reference<ListenerT>>
+OInterfaceContainerHelper4<ListenerT>::getElements(std::unique_lock<std::mutex>& /*rGuard*/) const
+{
+    return *maData;
+}
+
+template <class ListenerT>
+sal_Int32
+OInterfaceContainerHelper4<ListenerT>::addInterface(std::unique_lock<std::mutex>& /*rGuard*/,
+                                                    const css::uno::Reference<ListenerT>& rListener)
+{
+    assert(rListener.is());
+    maData->push_back(rListener);
+    return maData->size();
+}
+
+template <class ListenerT>
+sal_Int32 OInterfaceContainerHelper4<ListenerT>::removeInterface(
+    std::unique_lock<std::mutex>& /*rGuard*/, const css::uno::Reference<ListenerT>& rListener)
+{
+    assert(rListener.is());
+
+    // It is not valid to compare the pointer directly, but it's faster.
+    auto it = std::find_if(maData->begin(), maData->end(),
+                           [&rListener](const css::uno::Reference<css::uno::XInterface>& rItem) {
+                               return rItem.get() == rListener.get();
+                           });
+
+    // interface not found, use the correct compare method
+    if (it == maData->end())
+        it = std::find(maData->begin(), maData->end(), rListener);
+
+    if (it != maData->end())
+        maData->erase(it);
+
+    return maData->size();
+}
+
+template <class ListenerT>
+void OInterfaceContainerHelper4<ListenerT>::disposeAndClear(std::unique_lock<std::mutex>& rGuard,
+                                                            const css::lang::EventObject& rEvt)
+{
+    {
+        OInterfaceIteratorHelper4<ListenerT> aIt(rGuard, *this);
+        maData
+            = DEFAULT(); // cheaper than calling maData->clear() because it doesn't allocate a new vector
+        rGuard.unlock();
+        // unlock followed by iterating is only safe because we are not going to call remove() on the iterator
+        while (aIt.hasMoreElements())
+        {
+            try
+            {
+                aIt.next()->disposing(rEvt);
+            }
+            catch (css::uno::RuntimeException&)
+            {
+                // be robust, if e.g. a remote bridge has disposed already.
+                // there is no way to delegate the error to the caller :o(.
+            }
+        }
+    }
+    // tdf#152077 need to destruct the OInterfaceIteratorHelper4 before we take the lock again
+    // because there is a vague chance that destructing it will trigger a call back into something
+    // that wants to take the lock.
+    rGuard.lock();
+}
+
+template <class ListenerT>
+void OInterfaceContainerHelper4<ListenerT>::clear(::std::unique_lock<::std::mutex>& /*rGuard*/)
+{
+    maData->clear();
+}
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/logging.hxx b/include/comphelper/logging.hxx
new file mode 100644
index 000000000..f0a599765
--- /dev/null
+++ b/include/comphelper/logging.hxx
@@ -0,0 +1,460 @@
+/* -*- 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_COMPHELPER_LOGGING_HXX
+#define INCLUDED_COMPHELPER_LOGGING_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+
+#include <optional>
+#include <memory>
+
+namespace com::sun::star::uno { template <class interface_type> class Reference; }
+namespace com::sun::star::uno { class XComponentContext; }
+namespace com::sun::star::logging { class XLogger; }
+
+namespace comphelper
+{
+
+
+    //= string conversions, employed by the templatized log* members of
+    //= EventLogger
+
+
+    namespace log::convert
+    {
+        inline const OUString& convertLogArgToString( const OUString& _rValue )
+        {
+            return _rValue;
+        }
+
+        inline OUString convertLogArgToString( const char* _pAsciiValue )
+        {
+            return OUString::createFromAscii( _pAsciiValue );
+        }
+
+        inline OUString convertLogArgToString( double      _nValue ) { return OUString::number( _nValue ); }
+        inline OUString convertLogArgToString( float       _nValue ) { return OUString::number( _nValue ); }
+        inline OUString convertLogArgToString( sal_Int64   _nValue ) { return OUString::number( _nValue ); }
+        inline OUString convertLogArgToString( sal_Int32   _nValue ) { return OUString::number( _nValue ); }
+        inline OUString convertLogArgToString( sal_Int16   _nValue ) { return OUString::number( _nValue ); }
+        inline OUString convertLogArgToString( sal_Unicode _nValue ) { return OUString( _nValue ); }
+        inline OUString convertLogArgToString( bool    _bValue ) { return OUString::boolean( _bValue ); }
+        void convertLogArgToString(sal_Bool) = delete;
+
+    } // namespace log::convert
+
+
+    //= EventLogger
+
+    class EventLogger_Impl;
+    typedef ::std::optional< OUString >    OptionalString;
+
+    /** encapsulates a css::logging::XLogger
+
+        The class silences several (unlikely) errors which could potentially happen
+        when working with a logger. Additionally, it provides some convenience methods
+        for logging events.
+
+        You can use this class as follows
+<pre>
+    EventLogger aLogger( xContext, sLoggerName );
+    ...
+    aLogger.log( LogLevel::SEVERE, sSomeMessage );
+    aLogger.logp( LogLevel::CONFIG, "MyClass", "MyMethod", sSomeMessage, SomeParameter1, SomeParameter2, SomeParameter3 );
+</pre>
+
+        The <code>log</code> and <code>logp</code> calls support up to 6 parameters, which can be of
+        arbitrary type. For every parameter, there must exist a function <code>convertLogArgToString</code>
+        which takes an argument of the respective type, and returns a string.
+
+        After a parameter has been converted to a string using the above mentioned
+        <code>convertLogArgToString</code> function, a placeholder $1$ (resp. $2$ resp. $4$ ...)
+        in the message will be replaced with this string, and the resulting message will be logged.
+    */
+    class COMPHELPER_DLLPUBLIC EventLogger
+    {
+    protected:
+        std::shared_ptr< EventLogger_Impl > m_pImpl;
+
+    public:
+        /** creates an <code>EventLogger</code> instance working with a css.logging.XLogger
+            instance given by ASCII name.
+
+            @param _rxContext
+                the component context to create services
+
+            @param _rLoggerName
+                the ASCII name of the logger to create.
+        */
+        EventLogger(
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+            const char* _pAsciiLoggerName
+        );
+
+    public:
+        /// determines whether an event with the given level would be logged
+        bool        isLoggable( const sal_Int32 _nLogLevel ) const;
+
+
+        //- XLogger::log equivalents/wrappers
+        //- string messages
+
+        /// logs a given message, without any arguments, or source class/method names
+        void        log( const sal_Int32 _nLogLevel, const OUString& rMessage ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log(_nLogLevel, nullptr, nullptr, rMessage);
+        }
+
+        const css::uno::Reference<css::logging::XLogger> & getLogger() const;
+
+        /** logs a given message, replacing a placeholder in the message with an argument
+
+            The function takes, additionally to the log level and the message, an arbitrary
+            argument. This argument is converted to a string using an overloaded function
+            named <code>convertLogArgToString</code>. Then, a placeholder &quot;$1$&quot;
+            is searched in the message string, and replaced with the argument string.
+        */
+        template< typename ARGTYPE1 >
+        void        log( const sal_Int32 _nLogLevel, const OUString& _rMessage, ARGTYPE1 _argument1 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ) );
+        }
+
+        /// logs a given message, replacing 2 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2 >
+        void        log( const sal_Int32 _nLogLevel, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ) );
+        }
+
+        /// logs a given message, replacing 3 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3 >
+        void        log( const sal_Int32 _nLogLevel, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ) );
+        }
+
+        /// logs a given message, replacing 4 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4 >
+        void        log( const sal_Int32 _nLogLevel, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ) );
+        }
+
+        /// logs a given message, replacing 5 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5 >
+        void        log( const sal_Int32 _nLogLevel, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ) );
+        }
+
+        /// logs a given message, replacing 6 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5, typename ARGTYPE6 >
+        void        log( const sal_Int32 _nLogLevel, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5, ARGTYPE6 _argument6 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument6 ) ) );
+        }
+
+
+        //- XLogger::log equivalents/wrappers
+        //- ASCII messages
+
+        /** logs a given message, replacing a placeholder in the message with an argument
+
+            The function takes, additionally to the log level and the message, an arbitrary
+            argument. This argument is converted to a string using an overloaded function
+            named <code>convertLogArgToString</code>. Then, a placeholder &quot;$1$&quot;
+            is searched in the message string, and replaced with the argument string.
+        */
+        template< typename ARGTYPE1 >
+        void        log( const sal_Int32 _nLogLevel, const char* _pMessage, ARGTYPE1 _argument1 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, OUString::createFromAscii( _pMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ) );
+        }
+
+        /// logs a given message, replacing 2 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2 >
+        void        log( const sal_Int32 _nLogLevel, const char* _pMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, OUString::createFromAscii( _pMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ) );
+        }
+
+        /// logs a given message, replacing 3 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3 >
+        void        log( const sal_Int32 _nLogLevel, const char* _pMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, OUString::createFromAscii( _pMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ) );
+        }
+
+        /// logs a given message, replacing 4 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4 >
+        void        log( const sal_Int32 _nLogLevel, const char* _pMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, OUString::createFromAscii( _pMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ) );
+        }
+
+        /// logs a given message, replacing 5 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5 >
+        void        log( const sal_Int32 _nLogLevel, const char* _pMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, OUString::createFromAscii( _pMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ) );
+        }
+
+        /// logs a given message, replacing 6 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5, typename ARGTYPE6 >
+        void        log( const sal_Int32 _nLogLevel, const char* _pMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5, ARGTYPE6 _argument6 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, nullptr, nullptr, OUString::createFromAscii( _pMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument6 ) ) );
+        }
+
+
+        //- XLogger::logp equivalents/wrappers
+        //- string messages
+
+        /** logs a given message, replacing a placeholder in the message with an argument
+
+            The function takes, additionally to the logp level and the message, an arbitrary
+            argument. This argument is converted to a string using an overloaded function
+            named <code>convertLogArgToString</code>. Then, a placeholder &quot;$1$&quot;
+            is searched in the message string, and replaced with the argument string.
+        */
+        template< typename ARGTYPE1 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const OUString& _rMessage, ARGTYPE1 _argument1 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ) );
+        }
+
+        /// logs a given message, replacing 2 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ) );
+        }
+
+        /// logs a given message, replacing 3 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ) );
+        }
+
+        /// logs a given message, replacing 4 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ) );
+        }
+
+        /// logs a given message, replacing 5 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ) );
+        }
+
+        /// logs a given message, replacing 6 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5, typename ARGTYPE6 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const OUString& _rMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5, ARGTYPE6 _argument6 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, _rMessage,
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument6 ) ) );
+        }
+
+
+        //- XLogger::logp equivalents/wrappers
+        //- ASCII messages
+
+        /** logs a given ASCII message, replacing a placeholder in the message with an argument
+
+            The function takes, additionally to the logp level and the message, an arbitrary
+            argument. This argument is converted to a string using an overloaded function
+            named <code>convertLogArgToString</code>. Then, a placeholder &quot;$1$&quot;
+            is searched in the message string, and replaced with the argument string.
+        */
+        template< typename ARGTYPE1 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const char* _pAsciiMessage, ARGTYPE1 _argument1 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, OUString::createFromAscii( _pAsciiMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ) );
+        }
+
+        /// logs a given ASCII message, replacing 2 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const char* _pAsciiMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, OUString::createFromAscii( _pAsciiMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ) );
+        }
+
+        /// logs a given ASCII message, replacing 3 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const char* _pAsciiMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, OUString::createFromAscii( _pAsciiMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ) );
+        }
+
+        /// logs a given ASCII message, replacing 4 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const char* _pAsciiMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, OUString::createFromAscii( _pAsciiMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ) );
+        }
+
+        /// logs a given ASCII message, replacing 5 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const char* _pAsciiMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, OUString::createFromAscii( _pAsciiMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ) );
+        }
+
+        /// logs a given ASCII message, replacing 6 placeholders in the message with respective values
+        template< typename ARGTYPE1, typename ARGTYPE2, typename ARGTYPE3, typename ARGTYPE4, typename ARGTYPE5, typename ARGTYPE6 >
+        void        logp( const sal_Int32 _nLogLevel, const char* _pSourceClass, const char* _pSourceMethod, const char* _pAsciiMessage, ARGTYPE1 _argument1, ARGTYPE2 _argument2, ARGTYPE3 _argument3, ARGTYPE4 _argument4, ARGTYPE5 _argument5, ARGTYPE6 _argument6 ) const
+        {
+            if ( isLoggable( _nLogLevel ) )
+                impl_log( _nLogLevel, _pSourceClass, _pSourceMethod, OUString::createFromAscii( _pAsciiMessage ),
+                    OptionalString( log::convert::convertLogArgToString( _argument1 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument2 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument3 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument4 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument5 ) ),
+                    OptionalString( log::convert::convertLogArgToString( _argument6 ) ) );
+        }
+
+    protected:
+        void        impl_log(
+                        const sal_Int32 _nLogLevel,
+                        const char* _pSourceClass,
+                        const char* _pSourceMethod,
+                        const OUString& _rMessage,
+                        const OptionalString& _rArgument1 = OptionalString(),
+                        const OptionalString& _rArgument2 = OptionalString(),
+                        const OptionalString& _rArgument3 = OptionalString(),
+                        const OptionalString& _rArgument4 = OptionalString(),
+                        const OptionalString& _rArgument5 = OptionalString(),
+                        const OptionalString& _rArgument6 = OptionalString()
+                    ) const;
+    };
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_LOGGING_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/lok.hxx b/include/comphelper/lok.hxx
new file mode 100644
index 000000000..66784e8e4
--- /dev/null
+++ b/include/comphelper/lok.hxx
@@ -0,0 +1,117 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_LOK_HXX
+#define INCLUDED_COMPHELPER_LOK_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustring.hxx>
+
+class LanguageTag;
+
+// Interface between the LibreOfficeKit implementation called by LibreOfficeKit clients and other
+// LibreOffice code.
+
+namespace comphelper::LibreOfficeKit
+{
+// Functions to be called only from the LibreOfficeKit implementation in desktop, not from other
+// places in LibreOffice code.
+
+COMPHELPER_DLLPUBLIC void setActive(bool bActive = true);
+
+enum class statusIndicatorCallbackType
+{
+    Start,
+    SetValue,
+    Finish
+};
+
+COMPHELPER_DLLPUBLIC void setStatusIndicatorCallback(
+    void (*callback)(void* data, statusIndicatorCallbackType type, int percent, const char* pText),
+    void* data);
+
+// Functions that can be called from arbitrary places in LibreOffice.
+
+// Check whether the code is running as invoked through LibreOfficeKit.
+COMPHELPER_DLLPUBLIC bool isActive();
+
+/// Shift the coordinates before rendering each bitmap.
+/// Used by Calc to render each tile separately.
+/// This should be unnecessary (and removed) once Calc
+/// moves to using 100MM Unit.
+COMPHELPER_DLLPUBLIC void setLocalRendering(bool bLocalRendering = true);
+COMPHELPER_DLLPUBLIC bool isLocalRendering();
+
+/// Check whether clients want a part number in an invalidation payload.
+COMPHELPER_DLLPUBLIC bool isPartInInvalidation();
+/// Set whether clients want a part number in an invalidation payload.
+COMPHELPER_DLLPUBLIC void setPartInInvalidation(bool bPartInInvalidation);
+
+/// Check if we are doing tiled painting.
+COMPHELPER_DLLPUBLIC bool isTiledPainting();
+/// Set if we are doing tiled painting.
+COMPHELPER_DLLPUBLIC void setTiledPainting(bool bTiledPainting);
+/// Check if we are painting the dialog.
+COMPHELPER_DLLPUBLIC bool isDialogPainting();
+/// Set if we are painting the dialog.
+COMPHELPER_DLLPUBLIC void setDialogPainting(bool bDialogPainting);
+/// Set the DPI scale for rendering for HiDPI displays.
+COMPHELPER_DLLPUBLIC void setDPIScale(double fDPIScale);
+/// Get the DPI scale for rendering for HiDPI displays.
+COMPHELPER_DLLPUBLIC double getDPIScale();
+/// Set if we want no annotations rendering
+COMPHELPER_DLLPUBLIC void setTiledAnnotations(bool bTiledAnnotations);
+/// Check if annotations rendering is turned off
+COMPHELPER_DLLPUBLIC bool isTiledAnnotations();
+/// Set if we want range based header data
+COMPHELPER_DLLPUBLIC void setRangeHeaders(bool bTiledAnnotations);
+/// Check if range based header data is enabled
+COMPHELPER_DLLPUBLIC bool isRangeHeaders();
+
+enum Compat : sal_uInt32
+{
+    none = 0,
+    scNoGridBackground = 1,
+    scPrintTwipsMsgs = 2,
+};
+/// Set compatibility flags
+COMPHELPER_DLLPUBLIC void setCompatFlag(Compat flag);
+/// Get compatibility flags
+COMPHELPER_DLLPUBLIC bool isCompatFlagSet(Compat flag);
+
+/// Check whether clients want viewId in visible cursor invalidation payload.
+COMPHELPER_DLLPUBLIC bool isViewIdForVisCursorInvalidation();
+/// Set whether clients want viewId in visible cursor invalidation payload.
+COMPHELPER_DLLPUBLIC void setViewIdForVisCursorInvalidation(bool bViewIdForVisCursorInvalidation);
+
+/// Update the current LOK's locale.
+COMPHELPER_DLLPUBLIC void setLocale(const LanguageTag& languageTag);
+/// Get the current LOK's locale.
+COMPHELPER_DLLPUBLIC const LanguageTag& getLocale();
+
+/// Update the current LOK's language.
+COMPHELPER_DLLPUBLIC void setLanguageTag(const LanguageTag& languageTag);
+/// Get the current LOK's language.
+COMPHELPER_DLLPUBLIC const LanguageTag& getLanguageTag();
+/// If the language name should be used for this LOK instance.
+COMPHELPER_DLLPUBLIC bool isAllowlistedLanguage(const OUString& lang);
+
+// Status indicator handling. Even if in theory there could be several status indicators active at
+// the same time, in practice there is only one at a time, so we don't handle any identification of
+// status indicator in this API.
+COMPHELPER_DLLPUBLIC void statusIndicatorStart(const OUString& sText);
+COMPHELPER_DLLPUBLIC void statusIndicatorSetValue(int percent);
+COMPHELPER_DLLPUBLIC void statusIndicatorFinish();
+
+COMPHELPER_DLLPUBLIC void setBlockedCommandList(const char* blockedCommandList);
+}
+
+#endif // INCLUDED_COMPHELPER_LOK_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/make_shared_from_uno.hxx b/include/comphelper/make_shared_from_uno.hxx
new file mode 100644
index 000000000..7075e3000
--- /dev/null
+++ b/include/comphelper/make_shared_from_uno.hxx
@@ -0,0 +1,68 @@
+/* -*- 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_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX
+#define INCLUDED_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX
+
+#include <memory>
+
+namespace comphelper
+{
+/// @internal
+namespace detail
+{
+/// @internal
+template <typename T> struct ReleaseFunc
+{
+    void operator()(T* p) const { p->release(); }
+};
+} // namespace detail
+
+/** Makes a std::shared_ptr from a ref-counted UNO object pointer.
+    This makes sense if the object is used via UNO (implementing some X
+    interface) and also internally using its implementation class, e.g.
+
+    <pre>
+        std::shared_ptr<MyUnoImpl> const ptr(
+            comphelper::make_shared_from_UNO( new MyUnoImpl ) );
+        ...
+        xUno->callingUno( uno::Reference<XSomeInterface>( ptr.get() ) );
+        ...
+        takeSharedPtr( ptr );
+        ...
+    </pre>
+
+    @attention The shared_ptr operates on a separate reference counter, so
+               weak pointers (std::weak_ptr) are invalidated when the last
+               shared_ptr is destroyed, although the UNO object may still be
+               alive.
+
+    @param p object pointer
+    @return shared_ptr to object
+*/
+template <typename T> inline std::shared_ptr<T> make_shared_from_UNO(T* p)
+{
+    p->acquire();
+    return std::shared_ptr<T>(p, detail::ReleaseFunc<T>());
+}
+
+} // namespace comphelper
+
+#endif // ! defined(INCLUDED_COMPHELPER_MAKE_SHARED_FROM_UNO_HXX)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/mimeconfighelper.hxx b/include/comphelper/mimeconfighelper.hxx
new file mode 100644
index 000000000..5dd99664a
--- /dev/null
+++ b/include/comphelper/mimeconfighelper.hxx
@@ -0,0 +1,142 @@
+/* -*- 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_COMPHELPER_MIMECONFIGHELPER_HXX
+#define INCLUDED_COMPHELPER_MIMECONFIGHELPER_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <mutex>
+
+namespace com::sun::star::beans { struct NamedValue; }
+namespace com::sun::star::beans { struct PropertyValue; }
+namespace com::sun::star::container { class XContainerQuery; }
+namespace com::sun::star::container { class XNameAccess; }
+namespace com::sun::star::embed { struct VerbDescriptor; }
+namespace com::sun::star::lang { class XMultiServiceFactory; }
+namespace com::sun::star::uno { class XComponentContext; }
+
+enum class SfxFilterFlags;
+
+namespace comphelper {
+
+class COMPHELPER_DLLPUBLIC MimeConfigurationHelper
+{
+    std::mutex                                             m_aMutex;
+    css::uno::Reference< css::uno::XComponentContext >     m_xContext;
+    css::uno::Reference< css::lang::XMultiServiceFactory > m_xConfigProvider;
+
+    css::uno::Reference< css::container::XNameAccess > m_xObjectConfig;
+    css::uno::Reference< css::container::XNameAccess > m_xVerbsConfig;
+    css::uno::Reference< css::container::XNameAccess > m_xMediaTypeConfig;
+
+    css::uno::Reference< css::container::XNameAccess > m_xFilterFactory;
+
+public:
+
+    MimeConfigurationHelper( css::uno::Reference< css::uno::XComponentContext > xContext );
+
+
+    static OUString GetStringClassIDRepresentation( const css::uno::Sequence< sal_Int8 >& aClassID );
+
+    static css::uno::Sequence< sal_Int8 > GetSequenceClassIDRepresentation( std::u16string_view aClassID );
+
+
+    css::uno::Reference< css::container::XNameAccess > GetObjConfiguration();
+    css::uno::Reference< css::container::XNameAccess > GetVerbsConfiguration();
+    css::uno::Reference< css::container::XNameAccess > GetMediaTypeConfiguration();
+
+
+    OUString GetDocServiceNameFromFilter( const OUString& aFilterName );
+
+    OUString GetDocServiceNameFromMediaType( const OUString& aMediaType );
+
+    css::uno::Sequence< css::beans::NamedValue > GetObjPropsFromConfigEntry(
+                        const css::uno::Sequence< sal_Int8 >& aClassID,
+                        const css::uno::Reference< css::container::XNameAccess >& xObjectProps );
+
+    bool GetVerbByShortcut( const OUString& aVerbShortcut,
+                                css::embed::VerbDescriptor& aDescriptor );
+
+    OUString GetExplicitlyRegisteredObjClassID( const OUString& aMediaType );
+
+
+    // retrieving object description from configuration
+    css::uno::Sequence< css::beans::NamedValue > GetObjectPropsByStringClassID(
+                                                                const OUString& aStringClassID );
+
+    css::uno::Sequence< css::beans::NamedValue > GetObjectPropsByClassID(
+                                                const css::uno::Sequence< sal_Int8 >& aClassID );
+
+    css::uno::Sequence< css::beans::NamedValue > GetObjectPropsByMediaType(
+                                                const OUString& aMediaType );
+
+    css::uno::Sequence< css::beans::NamedValue > GetObjectPropsByFilter(
+                                                const OUString& aFilterName );
+
+    css::uno::Sequence< css::beans::NamedValue > GetObjectPropsByDocumentName(
+                                                std::u16string_view aDocumentName );
+
+    // retrieving object factory from configuration
+    OUString GetFactoryNameByStringClassID( const OUString& aStringClassID );
+    OUString GetFactoryNameByClassID( const css::uno::Sequence< sal_Int8 >& aClassID );
+    OUString GetFactoryNameByDocumentName( std::u16string_view aDocName );
+    OUString GetFactoryNameByMediaType( const OUString& aMediaType );
+
+    // typedetection related
+    css::uno::Reference< css::container::XNameAccess > GetFilterFactory();
+
+    OUString UpdateMediaDescriptorWithFilterName(
+                        css::uno::Sequence< css::beans::PropertyValue >& aMediaDescr,
+                        bool bIgnoreType );
+    OUString UpdateMediaDescriptorWithFilterName(
+                        css::uno::Sequence< css::beans::PropertyValue >& aMediaDescr,
+                        css::uno::Sequence< css::beans::NamedValue >& aObject );
+#ifdef _WIN32
+    SfxFilterFlags GetFilterFlags( const OUString& aFilterName );
+
+    bool AddFilterNameCheckOwnFile(
+                        css::uno::Sequence< css::beans::PropertyValue >& aMediaDescr );
+#endif
+
+    OUString GetDefaultFilterFromServiceName( const OUString& aServName, sal_Int32 nVersion );
+
+    OUString GetExportFilterFromImportFilter( const OUString& aImportFilterName );
+
+    static css::uno::Sequence< css::beans::PropertyValue > SearchForFilter(
+                        const css::uno::Reference< css::container::XContainerQuery >& xFilterQuery,
+                        const css::uno::Sequence< css::beans::NamedValue >& aSearchRequest,
+                        SfxFilterFlags nMustFlags,
+                        SfxFilterFlags nDontFlags );
+
+    static bool ClassIDsEqual( const css::uno::Sequence< sal_Int8 >& aClassID1,
+                        const css::uno::Sequence< sal_Int8 >& aClassID2 );
+    static css::uno::Sequence< sal_Int8 > GetSequenceClassID( sal_uInt32 n1, sal_uInt16 n2, sal_uInt16 n3,
+                                                sal_uInt8 b8, sal_uInt8 b9, sal_uInt8 b10, sal_uInt8 b11,
+                                                sal_uInt8 b12, sal_uInt8 b13, sal_uInt8 b14, sal_uInt8 b15 );
+private:
+    css::uno::Reference< css::container::XNameAccess >
+                                            GetConfigurationByPathImpl( const OUString& aPath );
+};
+
+}
+
+#endif // INCLUDED_COMPHELPER_MIMECONFIGHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/multicontainer2.hxx b/include/comphelper/multicontainer2.hxx
new file mode 100644
index 000000000..91875b668
--- /dev/null
+++ b/include/comphelper/multicontainer2.hxx
@@ -0,0 +1,133 @@
+/* -*- 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 .
+ */
+
+#pragma once
+
+#include <sal/config.h>
+
+#include <osl/mutex.hxx>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/interfacecontainer2.hxx>
+#include <memory>
+#include <vector>
+#include <utility>
+
+namespace com::sun::star::uno
+{
+class XInterface;
+}
+
+namespace comphelper
+{
+/** This is a copy of cppu::OMultiTypeInterfaceContainerHelper2 in include/cppuhelper/interfacecontainer.h,
+    except that it uses comphelper::OInterfaceContainerHelper2, which is more efficient.
+*/
+class COMPHELPER_DLLPUBLIC OMultiTypeInterfaceContainerHelper2
+{
+public:
+    /**
+      Create a container of interface containers.
+
+      @param rMutex the mutex to protect multi thread access.
+                         The lifetime must be longer than the lifetime
+                         of this object.
+     */
+    OMultiTypeInterfaceContainerHelper2(::osl::Mutex& rMutex);
+    /**
+      Delete all containers.
+     */
+    ~OMultiTypeInterfaceContainerHelper2();
+
+    /**
+      Return all id's under which at least one interface is added.
+     */
+    std::vector<css::uno::Type> getContainedTypes() const;
+
+    /**
+      Return the container created under this key.
+      @return the container created under this key. If the container
+                 was not created, null was returned.
+     */
+    OInterfaceContainerHelper2* getContainer(const css::uno::Type& rKey) const;
+
+    /** Inserts an element into the container with the specified key.
+        The position is not specified, thus it is not specified in which order events are fired.
+
+        @attention
+        If you add the same interface more than once, then it will be added to the elements list
+        more than once and thus if you want to remove that interface from the list, you have to call
+        removeInterface() the same number of times.
+        In the latter case, you will also get events fired more than once (if the interface is a
+        listener interface).
+
+        @param rKey
+               the id of the container
+        @param r
+               interface to be added; it is allowed, to insert null or
+               the same interface more than once
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 addInterface(const css::uno::Type& rKey,
+                           const css::uno::Reference<css::uno::XInterface>& r);
+
+    /** Removes an element from the container with the specified key.
+        It uses interface equality to remove the interface.
+
+        @param rKey
+               the id of the container
+        @param rxIFace
+               interface to be removed
+        @return
+                the new count of elements in the container
+    */
+    sal_Int32 removeInterface(const css::uno::Type& rKey,
+                              const css::uno::Reference<css::uno::XInterface>& rxIFace);
+
+    /**
+      Call disposing on all object in the container that
+      support XEventListener. Then clear the container.
+     */
+    void disposeAndClear(const css::lang::EventObject& rEvt);
+    /**
+      Remove all elements of all containers. Does not delete the container.
+     */
+    void clear();
+
+    typedef css::uno::Type keyType;
+
+private:
+    typedef std::vector<std::pair<css::uno::Type, std::unique_ptr<OInterfaceContainerHelper2>>>
+        t_type2ptr;
+
+    t_type2ptr::iterator findType(const css::uno::Type& rKey);
+    t_type2ptr::const_iterator findType(const css::uno::Type& rKey) const;
+
+    t_type2ptr m_aMap;
+    ::osl::Mutex& rMutex;
+
+    OMultiTypeInterfaceContainerHelper2(const OMultiTypeInterfaceContainerHelper2&) = delete;
+    OMultiTypeInterfaceContainerHelper2& operator=(const OMultiTypeInterfaceContainerHelper2&)
+        = delete;
+};
+
+} // namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/multiinterfacecontainer3.hxx b/include/comphelper/multiinterfacecontainer3.hxx
new file mode 100644
index 000000000..87199885e
--- /dev/null
+++ b/include/comphelper/multiinterfacecontainer3.hxx
@@ -0,0 +1,217 @@
+/* -*- 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 .
+ */
+#pragma once
+
+#include <sal/config.h>
+
+#include <com/sun/star/lang/EventObject.hpp>
+#include <comphelper/interfacecontainer3.hxx>
+#include <memory>
+#include <vector>
+
+namespace osl
+{
+class Mutex;
+}
+
+namespace comphelper
+{
+/**
+  A helper class to store interface references of different types.
+  This is a copy of the similar class at include/cppuhelper/interfacecontainer.h,
+  but now uses the improved comphelper::InterfaceContainer3.
+
+  @see OInterfaceIteratorHelper3
+  @see OInterfaceContainerHelper3
+ */
+template <class listener, class key, class equalImpl = std::equal_to<key>>
+class OMultiTypeInterfaceContainerHelperVar3
+{
+public:
+    /**
+      Create a container of interface containers.
+
+      @param rMutex the mutex to protect multi thread access.
+                         The lifetime must be longer than the lifetime
+                         of this object.
+     */
+    inline OMultiTypeInterfaceContainerHelperVar3(::osl::Mutex& rMutex_)
+        : rMutex(rMutex_)
+    {
+    }
+
+    /**
+      Return all id's under which at least one interface is added.
+     */
+    inline std::vector<key> getContainedTypes() const
+    {
+        ::osl::MutexGuard aGuard(rMutex);
+        std::vector<key> aInterfaceTypes;
+        aInterfaceTypes.reserve(m_aMap.size());
+        for (const auto& rPair : m_aMap)
+            // are interfaces added to this container?
+            if (rPair.second->getLength())
+                // yes, put the type in the array
+                aInterfaceTypes.push_back(rPair.first);
+        return aInterfaceTypes;
+    }
+
+    inline bool hasContainedTypes() const
+    {
+        ::osl::MutexGuard aGuard(rMutex);
+        for (const auto& rPair : m_aMap)
+            // are interfaces added to this container?
+            if (rPair.second->getLength())
+                return true;
+        return false;
+    }
+
+    /**
+      Return the container created under this key.
+      The InterfaceContainerHelper exists until the whole MultiTypeContainer is destroyed.
+      @return the container created under this key. If the container
+                 was not created, null was returned.
+     */
+    inline OInterfaceContainerHelper3<listener>* getContainer(const key& rKey) const
+    {
+        ::osl::MutexGuard aGuard(rMutex);
+
+        auto iter = find(rKey);
+        if (iter != m_aMap.end())
+            return (*iter).second.get();
+        return nullptr;
+    }
+
+    /** Inserts an element into the container with the specified key.
+        The position is not specified, thus it is not specified in which order events are fired.
+
+        @attention
+        If you add the same interface more than once, then it will be added to the elements list
+        more than once and thus if you want to remove that interface from the list, you have to call
+        removeInterface() the same number of times.
+        In the latter case, you will also get events fired more than once (if the interface is a
+        listener interface).
+
+        @param rKey
+               the id of the container
+        @param r
+               interface to be added; it is allowed, to insert null or
+               the same interface more than once
+        @return
+                the new count of elements in the container
+    */
+    inline sal_Int32 addInterface(const key& rKey, const css::uno::Reference<listener>& rListener)
+    {
+        ::osl::MutexGuard aGuard(rMutex);
+        auto iter = find(rKey);
+        if (iter == m_aMap.end())
+        {
+            auto pLC = new OInterfaceContainerHelper3<listener>(rMutex);
+            m_aMap.emplace_back(rKey, pLC);
+            return pLC->addInterface(rListener);
+        }
+        else
+            return (*iter).second->addInterface(rListener);
+    }
+
+    /** Removes an element from the container with the specified key.
+        It uses interface equality to remove the interface.
+
+        @param rKey
+               the id of the container
+        @param rxIFace
+               interface to be removed
+        @return
+                the new count of elements in the container
+    */
+    inline sal_Int32 removeInterface(const key& rKey,
+                                     const css::uno::Reference<listener>& rListener)
+    {
+        ::osl::MutexGuard aGuard(rMutex);
+
+        // search container with id nUik
+        auto iter = find(rKey);
+        // container found?
+        if (iter != m_aMap.end())
+            return (*iter).second->removeInterface(rListener);
+
+        // no container with this id. Always return 0
+        return 0;
+    }
+
+    /**
+      Call disposing on all references in the container, that
+      support XEventListener. Then clears the container.
+      @param rEvt the event object which is passed during disposing() call
+     */
+    inline void disposeAndClear(const css::lang::EventObject& rEvt)
+    {
+        // create a copy, because do not fire event in a guarded section
+        InterfaceMap tempMap;
+        {
+            ::osl::MutexGuard aGuard(rMutex);
+            tempMap = std::move(m_aMap);
+        }
+
+        for (auto& rPair : tempMap)
+            rPair.second->disposeAndClear(rEvt);
+    }
+
+    /**
+      Remove all elements of all containers. Does not delete the container.
+     */
+    inline void clear()
+    {
+        ::osl::MutexGuard aGuard(rMutex);
+
+        for (const auto& rPair : m_aMap)
+            rPair.second->clear();
+    }
+
+    typedef key keyType;
+
+private:
+    typedef ::std::vector<std::pair<key, std::unique_ptr<OInterfaceContainerHelper3<listener>>>>
+        InterfaceMap;
+    InterfaceMap m_aMap;
+    ::osl::Mutex& rMutex;
+
+    typename InterfaceMap::const_iterator find(const key& rKey) const
+    {
+        auto iter = m_aMap.begin();
+        auto end = m_aMap.end();
+
+        while (iter != end)
+        {
+            equalImpl equal;
+            if (equal(iter->first, rKey))
+                break;
+            ++iter;
+        }
+        return iter;
+    }
+
+    OMultiTypeInterfaceContainerHelperVar3(const OMultiTypeInterfaceContainerHelperVar3&) = delete;
+    OMultiTypeInterfaceContainerHelperVar3& operator=(const OMultiTypeInterfaceContainerHelperVar3&)
+        = delete;
+};
+
+} // namespace comphelper
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/multiinterfacecontainer4.hxx b/include/comphelper/multiinterfacecontainer4.hxx
new file mode 100644
index 000000000..eeccd2092
--- /dev/null
+++ b/include/comphelper/multiinterfacecontainer4.hxx
@@ -0,0 +1,190 @@
+/* -*- 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 .
+ */
+#pragma once
+#include <sal/config.h>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <comphelper/interfacecontainer4.hxx>
+#include <memory>
+#include <mutex>
+#include <vector>
+/** */ //for docpp
+namespace comphelper
+{
+/**
+  A helper class to store interface references of different types.
+  This is a copy of the code at include/comphelper/multiinterfacecontainer3.hxx,
+  except that it (a) uses std::mutex instead of osl::Mutex and (b) does not
+  store a reference to the mutex, but relies on the calling class to take
+  a lock around using it.
+  @see OInterfaceIteratorHelper3
+  @see OInterfaceContainerHelper3
+ */
+template <class key, class listener, class equalImpl = std::equal_to<key>>
+class OMultiTypeInterfaceContainerHelperVar4
+{
+public:
+    OMultiTypeInterfaceContainerHelperVar4() {}
+    /**
+      Return all id's under which at least one interface is added.
+     */
+    inline std::vector<key> getContainedTypes(std::unique_lock<std::mutex>& rGuard) const
+    {
+        std::vector<key> aInterfaceTypes;
+        aInterfaceTypes.reserve(m_aMap.size());
+        for (const auto& rPair : m_aMap)
+            // are interfaces added to this container?
+            if (rPair.second->getLength(rGuard))
+                // yes, put the type in the array
+                aInterfaceTypes.push_back(rPair.first);
+        return aInterfaceTypes;
+    }
+    inline bool hasContainedTypes() const
+    {
+        for (const auto& rPair : m_aMap)
+            // are interfaces added to this container?
+            if (rPair.second->getLength())
+                return true;
+        return false;
+    }
+    /**
+      Return the container created under this key.
+      The InterfaceContainerHelper exists until the whole MultiTypeContainer is destroyed.
+      @return the container created under this key. If the container
+                 was not created, null was returned.
+     */
+    inline OInterfaceContainerHelper4<listener>* getContainer(const key& rKey) const
+    {
+        auto iter = find(rKey);
+        if (iter != m_aMap.end())
+            return (*iter).second.get();
+        return nullptr;
+    }
+    /** Inserts an element into the container with the specified key.
+        The position is not specified, thus it is not specified in which order events are fired.
+        @attention
+        If you add the same interface more than once, then it will be added to the elements list
+        more than once and thus if you want to remove that interface from the list, you have to call
+        removeInterface() the same number of times.
+        In the latter case, you will also get events fired more than once (if the interface is a
+        listener interface).
+        @param rKey
+               the id of the container
+        @param r
+               interface to be added; it is allowed, to insert null or
+               the same interface more than once
+        @return
+                the new count of elements in the container
+    */
+    inline sal_Int32 addInterface(::std::unique_lock<::std::mutex>& rGuard, const key& rKey,
+                                  const css::uno::Reference<listener>& rListener)
+    {
+        auto iter = find(rKey);
+        if (iter == m_aMap.end())
+        {
+            auto pLC = new OInterfaceContainerHelper4<listener>();
+            m_aMap.emplace_back(rKey, pLC);
+            return pLC->addInterface(rGuard, rListener);
+        }
+        else
+            return (*iter).second->addInterface(rGuard, rListener);
+    }
+    /** Removes an element from the container with the specified key.
+        It uses interface equality to remove the interface.
+        @param rKey
+               the id of the container
+        @param rxIFace
+               interface to be removed
+        @return
+                the new count of elements in the container
+    */
+    inline sal_Int32 removeInterface(::std::unique_lock<::std::mutex>& rGuard, const key& rKey,
+                                     const css::uno::Reference<listener>& rListener)
+    {
+        // search container with id nUik
+        auto iter = find(rKey);
+        // container found?
+        if (iter != m_aMap.end())
+            return (*iter).second->removeInterface(rGuard, rListener);
+        // no container with this id. Always return 0
+        return 0;
+    }
+    /**
+      Call disposing on all references in the container, that
+      support XEventListener. Then clears the container.
+      @param rEvt the event object which is passed during disposing() call
+     */
+    inline void disposeAndClear(std::unique_lock<std::mutex>& rGuard,
+                                const css::lang::EventObject& rEvt)
+    {
+        // create a copy, because do not fire event in a guarded section
+        InterfaceMap tempMap;
+        {
+            tempMap = std::move(m_aMap);
+        }
+        rGuard.unlock();
+        for (auto& rPair : tempMap)
+        {
+            OInterfaceIteratorHelper4<listener> aIt(rGuard, *rPair.second);
+            while (aIt.hasMoreElements())
+            {
+                try
+                {
+                    aIt.next()->disposing(rEvt);
+                }
+                catch (css::uno::RuntimeException&)
+                {
+                    // be robust, if e.g. a remote bridge has disposed already.
+                    // there is no way to delegate the error to the caller :o(.
+                }
+            }
+        }
+    }
+    /**
+      Remove all elements of all containers. Does not delete the container.
+     */
+    inline void clear()
+    {
+        for (const auto& rPair : m_aMap)
+            rPair.second->clear();
+    }
+    typedef key keyType;
+
+private:
+    typedef ::std::vector<std::pair<key, std::unique_ptr<OInterfaceContainerHelper4<listener>>>>
+        InterfaceMap;
+    InterfaceMap m_aMap;
+    typename InterfaceMap::const_iterator find(const key& rKey) const
+    {
+        auto iter = m_aMap.begin();
+        auto end = m_aMap.end();
+        while (iter != end)
+        {
+            equalImpl equal;
+            if (equal(iter->first, rKey))
+                break;
+            ++iter;
+        }
+        return iter;
+    }
+    OMultiTypeInterfaceContainerHelperVar4(const OMultiTypeInterfaceContainerHelperVar4&) = delete;
+    OMultiTypeInterfaceContainerHelperVar4& operator=(const OMultiTypeInterfaceContainerHelperVar4&)
+        = delete;
+};
+} // namespace comphelper
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/namecontainer.hxx b/include/comphelper/namecontainer.hxx
new file mode 100644
index 000000000..616b07f1a
--- /dev/null
+++ b/include/comphelper/namecontainer.hxx
@@ -0,0 +1,40 @@
+/* -*- 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_COMPHELPER_NAMECONTAINER_HXX
+#define INCLUDED_COMPHELPER_NAMECONTAINER_HXX
+
+#include <com/sun/star/uno/Type.h>
+#include <com/sun/star/uno/Reference.h>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::container
+{
+class XNameContainer;
+}
+
+namespace comphelper
+{
+COMPHELPER_DLLPUBLIC css::uno::Reference<css::container::XNameContainer>
+NameContainer_createInstance(const css::uno::Type& aType);
+}
+
+#endif // INCLUDED_COMPHELPER_NAMECONTAINER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/namedvaluecollection.hxx b/include/comphelper/namedvaluecollection.hxx
new file mode 100644
index 000000000..b92646e40
--- /dev/null
+++ b/include/comphelper/namedvaluecollection.hxx
@@ -0,0 +1,322 @@
+/* -*- 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_COMPHELPER_NAMEDVALUECOLLECTION_HXX
+#define INCLUDED_COMPHELPER_NAMEDVALUECOLLECTION_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/beans/NamedValue.hpp>
+
+#include <vector>
+#include <unordered_map>
+
+namespace comphelper
+{
+
+
+    // = NamedValueCollection
+
+    /** a collection of named values, packed in various formats.
+    */
+    class COMPHELPER_DLLPUBLIC NamedValueCollection
+    {
+        std::unordered_map< OUString, css::uno::Any >  maValues;
+    public:
+        NamedValueCollection() = default;
+
+        NamedValueCollection( const NamedValueCollection& _rCopySource ) = default;
+        NamedValueCollection(NamedValueCollection&& _rCopySource) noexcept = default;
+
+        NamedValueCollection& operator=( const NamedValueCollection& i_rCopySource ) = default;
+        NamedValueCollection& operator=(NamedValueCollection&& i_rCopySource) noexcept = default;
+
+        /** constructs a collection
+            @param  _rElements
+                the wrapped elements of the collection. The @c Any might contain a sequence of
+                property values, a sequence of named values, or directly a property value or named value.
+                All other cases are worth an assertion in non-product builds.
+        */
+        NamedValueCollection( const css::uno::Any& _rElements );
+
+        /** constructs a collection
+            @param _rArguments
+                a sequence of Any's containing either PropertyValue's or NamedValue's.
+        */
+        NamedValueCollection( const css::uno::Sequence< css::uno::Any >& _rArguments );
+
+        /** constructs a collection
+            @param _rArguments
+                a sequence of PropertyValues's
+        */
+        NamedValueCollection( const css::uno::Sequence< css::beans::PropertyValue >& _rArguments );
+
+        /** constructs a collection
+            @param _rArguments
+                a sequence of NamedValue's
+        */
+        NamedValueCollection( const css::uno::Sequence< css::beans::NamedValue >& _rArguments );
+
+        void assign( const css::uno::Sequence< css::uno::Any >& _rArguments )
+        {
+            impl_assign( _rArguments );
+        }
+
+        void clear()
+        {
+            impl_assign( css::uno::Sequence< css::beans::NamedValue >() );
+        }
+
+        /** determines whether or not named values can be extracted from the given value
+
+            @return
+                true if and only if the given @c Any contains a @c NamedValue, a
+                @c PropertyValue, or a sequence thereof.
+        */
+        static bool canExtractFrom( css::uno::Any const & i_value );
+
+        /// returns the number of elements in the collection
+        size_t  size() const;
+
+        /// determines whether the collection is empty
+        bool    empty() const;
+
+        /** returns the names of all elements in the collection
+        */
+        ::std::vector< OUString >
+                getNames() const;
+
+        /** merges the content of another collection into @c this
+            @param _rAdditionalValues
+                the collection whose values are to be merged
+            @param _bOverwriteExisting
+                defines whether or not elements which are already present in @c this
+                should be overwritten (true) or preserved (false).
+            @return @c *this
+        */
+        NamedValueCollection&
+                merge(
+                    const NamedValueCollection& _rAdditionalValues,
+                    bool _bOverwriteExisting
+                );
+
+        /** retrieves a value with a given name from the collection, if it is present
+
+            @param _pAsciiValueName
+                the ASCII name of the value to retrieve
+
+            @param _out_rValue
+                is the output parameter taking the desired value upon successful return. If
+                a value with the given name is not present in the collection, or if a wrong-typed
+                value is present, then this parameter will not be touched.
+
+            @retval
+                true if there is a value with the given name, which could successfully
+                be extracted. In this case, @c _out_rValue will contain the requested
+                value.
+            @retval
+                false, if there is no value with the given name.
+
+            @throws IllegalArgumentException
+                in case there is a value with the given name, but it cannot legally assigned to
+                _out_rValue.
+        */
+        template < typename VALUE_TYPE >
+        bool get_ensureType( const OUString& _rValueName, VALUE_TYPE& _out_rValue ) const
+        {
+            return get_ensureType( _rValueName, &_out_rValue, ::cppu::UnoType< VALUE_TYPE >::get() );
+        }
+
+        /** retrieves a value with a given name, or defaults it to a given value, if it's not present
+            in the collection
+        */
+        template < typename VALUE_TYPE >
+        VALUE_TYPE  getOrDefault( const OUString& _rValueName, const VALUE_TYPE& _rDefault ) const
+        {
+            VALUE_TYPE retVal( _rDefault );
+            get_ensureType( _rValueName, retVal );
+            return retVal;
+        }
+
+        /** Retrieves a value with a given name, or defaults it to a given value, if it's not present
+            in the collection.
+            For when you only need a single value from a Sequence<PropertyValue>.
+        */
+        template < typename VALUE_TYPE >
+        static VALUE_TYPE  getOrDefault( const css::uno::Sequence<css::beans::PropertyValue> & rPropSeq,
+                    std::u16string_view _rValueName, const VALUE_TYPE& _rDefault )
+        {
+            VALUE_TYPE retVal( _rDefault );
+            get_ensureType( rPropSeq, _rValueName, &retVal, ::cppu::UnoType< VALUE_TYPE >::get() );
+            return retVal;
+        }
+
+        /** retrieves a (untyped) value with a given name
+
+            If the collection does not contain a value with the given name, an empty
+            Any is returned.
+        */
+        const css::uno::Any& get( const OUString& _rValueName ) const
+        {
+            return impl_get( _rValueName );
+        }
+
+        /** retrieves a (untyped) value with a given name. For when you only need a single value from a Sequence<PropertyValue>.
+
+            If the collection does not contain a value with the given name, an empty
+            Any is returned.
+        */
+        static const css::uno::Any& get( const css::uno::Sequence<css::beans::PropertyValue>& rPropSeq, std::u16string_view _rValueName );
+
+        /// determines whether a value with a given name is present in the collection
+        bool has( const OUString& _rValueName ) const
+        {
+            return impl_has( _rValueName );
+        }
+
+        /** puts a value into the collection
+
+            @return true if and only if a value was already present previously, in
+                which case it has been overwritten.
+        */
+        template < typename VALUE_TYPE >
+        bool put( const OUString& _rValueName, const VALUE_TYPE& _rValue )
+        {
+            return impl_put( _rValueName, css::uno::Any( _rValue ) );
+        }
+
+        bool put( const OUString& _rValueName, const css::uno::Any& _rValue )
+        {
+            return impl_put( _rValueName, _rValue );
+        }
+
+        /** removes the value with the given name from the collection
+
+            @return true if and only if a value with the given name existed in the collection.
+        */
+        bool remove( const OUString& _rValueName )
+        {
+            return impl_remove( _rValueName );
+        }
+
+        /** transforms the collection to a sequence of PropertyValues
+
+            @return
+                the number of elements in the sequence
+        */
+        sal_Int32 operator >>= ( css::uno::Sequence< css::beans::PropertyValue >& _out_rValues ) const;
+
+        /** transforms the collection to a sequence of NamedValues
+
+            @return
+                the number of elements in the sequence
+        */
+        sal_Int32 operator >>= ( css::uno::Sequence< css::beans::NamedValue >& _out_rValues ) const;
+
+        /** transforms the collection into a sequence of PropertyValues
+        */
+        css::uno::Sequence< css::beans::PropertyValue >
+                getPropertyValues() const
+        {
+            css::uno::Sequence< css::beans::PropertyValue > aValues;
+            *this >>= aValues;
+            return aValues;
+        }
+
+        /** returns a Sequence< Any >, containing PropertyValues
+        */
+        css::uno::Sequence< css::uno::Any >
+                getWrappedPropertyValues() const
+        {
+            return impl_wrap< css::beans::PropertyValue >();
+        }
+
+        /** returns a Sequence< Any >, containing NamedValues
+        */
+        css::uno::Sequence< css::uno::Any >
+                getWrappedNamedValues() const
+        {
+            return impl_wrap< css::beans::NamedValue >();
+        }
+
+        /** transforms the collection into a sequence of NamedValues
+        */
+        css::uno::Sequence< css::beans::NamedValue >
+                getNamedValues() const
+        {
+            css::uno::Sequence< css::beans::NamedValue > aValues;
+            *this >>= aValues;
+            return aValues;
+        }
+
+    private:
+        void    impl_assign( const css::uno::Any& i_rWrappedElements );
+        void    impl_assign( const css::uno::Sequence< css::uno::Any >& _rArguments );
+        void    impl_assign( const css::uno::Sequence< css::beans::PropertyValue >& _rArguments );
+        void    impl_assign( const css::uno::Sequence< css::beans::NamedValue >& _rArguments );
+
+        bool    get_ensureType(
+                    const OUString& _rValueName,
+                    void* _pValueLocation,
+                    const css::uno::Type& _rExpectedValueType
+                ) const;
+
+        static bool get_ensureType(
+                    const css::uno::Sequence<css::beans::PropertyValue> & rPropSeq,
+                    std::u16string_view _rValueName,
+                    void* _pValueLocation,
+                    const css::uno::Type& _rExpectedValueType
+                );
+
+        const css::uno::Any&
+                impl_get( const OUString& _rValueName ) const;
+
+        bool    impl_has( const OUString& _rValueName ) const;
+
+        bool    impl_put( const OUString& _rValueName, const css::uno::Any& _rValue );
+
+        bool    impl_remove( const OUString& _rValueName );
+
+        template< class VALUE_TYPE >
+        css::uno::Sequence< css::uno::Any > impl_wrap() const
+        {
+            css::uno::Sequence< VALUE_TYPE > aValues;
+            *this >>= aValues;
+            css::uno::Sequence< css::uno::Any > aWrappedValues( aValues.getLength() );
+
+            css::uno::Any* pO = aWrappedValues.getArray();
+            const VALUE_TYPE* pV = aValues.getConstArray();
+            const sal_Int32 nLen = aValues.getLength();
+            for( sal_Int32 i = 0; i < nLen; ++i )
+                *(pO++) = css::uno::Any( *(pV++) );
+
+            return aWrappedValues;
+        }
+    };
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_NAMEDVALUECOLLECTION_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/newarray.hxx b/include/comphelper/newarray.hxx
new file mode 100644
index 000000000..d3eaccd77
--- /dev/null
+++ b/include/comphelper/newarray.hxx
@@ -0,0 +1,42 @@
+/* -*- 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_COMPHELPER_NEWARRAY_HXX
+#define INCLUDED_COMPHELPER_NEWARRAY_HXX
+
+#include <limits>
+#include <new>
+#include <stddef.h>
+
+namespace comphelper {
+
+template<typename T> T *
+newArray_null(size_t const n) noexcept
+{
+    if ((::std::numeric_limits<size_t>::max() / sizeof(T)) <= n) {
+        return nullptr;
+    }
+    return new (::std::nothrow) T[n];
+}
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_NEWARRAY_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/numberedcollection.hxx b/include/comphelper/numberedcollection.hxx
new file mode 100644
index 000000000..3dbb1f534
--- /dev/null
+++ b/include/comphelper/numberedcollection.hxx
@@ -0,0 +1,168 @@
+/* -*- 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_COMPHELPER_NUMBEREDCOLLECTION_HXX
+#define INCLUDED_COMPHELPER_NUMBEREDCOLLECTION_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <com/sun/star/uno/Reference.h>
+#include <com/sun/star/frame/XUntitledNumbers.hpp>
+
+#include <cppuhelper/weakref.hxx>
+#include <cppuhelper/implbase.hxx>
+
+#include <unordered_map>
+#include <mutex>
+#include <vector>
+
+namespace com::sun::star::uno { class XInterface; }
+
+namespace comphelper{
+
+/** @short  defines a collection of UNO components, where every component will get its own unique number.
+
+    @descr  Such number will be unique at runtime only... but it supports fragmentation.
+            Note: This collection uses weak references only to know her components.
+            So lifetime of these components must be controlled outside.
+
+    @threadsafe
+ */
+class COMPHELPER_DLLPUBLIC NumberedCollection final :
+                                              public  ::cppu::WeakImplHelper< css::frame::XUntitledNumbers >
+{
+
+    // types, const
+    private:
+
+        struct TNumberedItem
+        {
+            css::uno::WeakReference< css::uno::XInterface > xItem;
+            ::sal_Int32 nNumber;
+        };
+
+        typedef std::unordered_map<
+                    sal_IntPtr,
+                    TNumberedItem  > TNumberedItemHash;
+
+        typedef ::std::vector< sal_IntPtr > TDeadItemList;
+
+
+    // interface
+    public:
+
+
+        /** @short  lightweight constructor.
+         */
+        NumberedCollection();
+
+
+        /** @short  free all internally used resources.
+         */
+        virtual ~NumberedCollection() override;
+
+
+        /** set an outside component which uses this container and must be set
+            as source of all broadcasted messages, exceptions.
+
+            It's holded weak only so we do not need any complex dispose sessions.
+
+            Note: Passing NULL as parameter will be allowed. It will reset the internal
+            member reference only.
+
+            @param  xOwner
+                    the new owner of this collection.
+         */
+        void setOwner (const css::uno::Reference< css::uno::XInterface >& xOwner);
+
+
+        /** set the localized prefix to be used for untitled components.
+
+            Localization has to be done outside. This container will return
+            those value then. There are no further checks. Its up to you to define
+            a suitable string here :-)
+
+            @param  sPrefix
+                    the new prefix for untitled components.
+         */
+        void setUntitledPrefix(const OUString& sPrefix);
+
+
+        /** @see css.frame.XUntitledNumbers */
+        virtual ::sal_Int32 SAL_CALL leaseNumber(const css::uno::Reference< css::uno::XInterface >& xComponent) override;
+
+
+        /** @see css.frame.XUntitledNumbers */
+        virtual void SAL_CALL releaseNumber(::sal_Int32 nNumber) override;
+
+
+        /** @see css.frame.XUntitledNumbers */
+        virtual void SAL_CALL releaseNumberForComponent(const css::uno::Reference< css::uno::XInterface >& xComponent) override;
+
+
+        /** @see css.frame.XUntitledNumbers */
+        virtual OUString SAL_CALL getUntitledPrefix() override;
+
+
+    // internal
+    private:
+
+
+        /** @short  tries to find a unique number not already used within this collection.
+
+            @descr  It reuses the smallest number which isn't used by any component
+                    of this collection. (fragmentation!) If collection is full (means there
+                    is no free number) the special value INVALID_NUMBER will be returned.
+
+            @note   Those method can't be called within a multithreaded environment.
+                    Because such number won't be "reserved" for the call of these method
+                    it can happen that two calls returns the same number (reasoned by the fact that first call
+                    doesn't used the returned number already.
+
+                    So the outside code has to make sure that retrieving and using of those numbers
+                    will be an atomic operation.
+
+            @return a unique number or special value INVALID_NUMBER if collection is full.
+         */
+        ::sal_Int32 impl_searchFreeNumber ();
+
+        static void impl_cleanUpDeadItems (      TNumberedItemHash& lItems    ,
+                                           const TDeadItemList&     lDeadItems);
+
+
+    // member
+    private:
+
+        /// localized string to be used for untitled components
+        OUString m_sUntitledPrefix;
+
+        /// cache of all "leased numbers" and its bound components
+        TNumberedItemHash m_lComponents;
+
+        /// used as source of broadcasted messages or exceptions (can be null !)
+        css::uno::WeakReference< css::uno::XInterface > m_xOwner;
+
+        std::mutex m_aMutex;
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_NUMBEREDCOLLECTION_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/numbers.hxx b/include/comphelper/numbers.hxx
new file mode 100644
index 000000000..e486bac0b
--- /dev/null
+++ b/include/comphelper/numbers.hxx
@@ -0,0 +1,56 @@
+/* -*- 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_COMPHELPER_NUMBERS_HXX
+#define INCLUDED_COMPHELPER_NUMBERS_HXX
+
+#include <rtl/ustring.hxx>
+#include <com/sun/star/uno/Reference.h>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::util { class XNumberFormats; }
+namespace com::sun::star::util { class XNumberFormatter; }
+
+namespace comphelper
+{
+
+    /// returns the css::util::NumberFormat of the given key under the given formats
+    COMPHELPER_DLLPUBLIC sal_Int16 getNumberFormatType(const css::uno::Reference<css::util::XNumberFormats>& xFormats, sal_Int32 nKey);
+
+    /// returns the css::util::NumberFormat of the given key under the given formatter
+    COMPHELPER_DLLPUBLIC sal_Int16 getNumberFormatType(const css::uno::Reference<css::util::XNumberFormatter>& xFormatter, sal_Int32 nKey);
+
+    /// returns the decimals of the given numeric number formatunder the given formats
+    COMPHELPER_DLLPUBLIC css::uno::Any getNumberFormatDecimals(const css::uno::Reference<css::util::XNumberFormats>& xFormats, sal_Int32 nKey);
+
+    /** retrieves the value of a given property for a given format key, relating to a given formatter
+    */
+    COMPHELPER_DLLPUBLIC css::uno::Any getNumberFormatProperty(
+        const css::uno::Reference< css::util::XNumberFormatter >& _rxFormatter,
+        sal_Int32 _nKey,
+        const OUString& _rPropertyName
+    );
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_NUMBERS_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/ofopxmlhelper.hxx b/include/comphelper/ofopxmlhelper.hxx
new file mode 100644
index 000000000..fe778bf1e
--- /dev/null
+++ b/include/comphelper/ofopxmlhelper.hxx
@@ -0,0 +1,101 @@
+/* -*- 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_COMPHELPER_OFOPXMLHELPER_HXX
+#define INCLUDED_COMPHELPER_OFOPXMLHELPER_HXX
+
+#include <sal/config.h>
+
+#include <string_view>
+
+#include <com/sun/star/uno/Sequence.h>
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::beans { struct StringPair; }
+namespace com::sun::star::io { class XInputStream; }
+namespace com::sun::star::io { class XOutputStream; }
+namespace com::sun::star::uno { class XComponentContext; }
+namespace com::sun::star::uno { template <class interface_type> class Reference; }
+
+namespace comphelper::OFOPXMLHelper {
+
+    // returns sequence of elements, where each element is described by sequence of tags,
+    // where each tag is described by StringPair ( First - name, Second - value )
+    // the first tag of each element sequence must be "Id"
+    /// @throws css::uno::Exception
+    COMPHELPER_DLLPUBLIC
+    css::uno::Sequence< css::uno::Sequence< css::beans::StringPair > >
+    ReadRelationsInfoSequence(
+        const css::uno::Reference< css::io::XInputStream >& xInStream,
+        std::u16string_view aStreamName,
+        const css::uno::Reference< css::uno::XComponentContext >& rContext );
+
+    // returns sequence containing two entries of type sequence<StringPair>
+    // the first sequence describes "Default" elements, where each element is described
+    // by StringPair object ( First - Extension, Second - ContentType )
+    // the second sequence describes "Override" elements, where each element is described
+    // by StringPair object ( First - PartName, Second - ContentType )
+    /// @throws css::uno::Exception
+    COMPHELPER_DLLPUBLIC
+    css::uno::Sequence< css::uno::Sequence< css::beans::StringPair > >
+    ReadContentTypeSequence(
+        const css::uno::Reference< css::io::XInputStream >& xInStream,
+        const css::uno::Reference< css::uno::XComponentContext >& rContext );
+
+    // returns the ContentType for the given name, or empty when not found.
+    // rContentTypes is a sequence containing two entries of type sequence<StringPair>
+    // the first sequence describes "Default" elements, where each element is described
+    // by StringPair object ( First - Extension, Second - ContentType )
+    // the second sequence describes "Override" elements, where each element is described
+    // by StringPair object ( First - PartName, Second - ContentType )
+    // The "Override" sequence is searched first before falling back on "Default".
+    COMPHELPER_DLLPUBLIC
+    OUString
+    GetContentTypeByName(const css::uno::Sequence<css::uno::Sequence<css::beans::StringPair>>& rContentTypes,
+                         const OUString& rFilename);
+
+    // writes sequence of elements, where each element is described by sequence of tags,
+    // where each tag is described by StringPair ( First - name, Second - value )
+    // the first tag of each element sequence must be "Id"
+    /// @throws css::uno::Exception
+    COMPHELPER_DLLPUBLIC
+    void WriteRelationsInfoSequence(
+        const css::uno::Reference< css::io::XOutputStream >& xOutStream,
+        const css::uno::Sequence< css::uno::Sequence< css::beans::StringPair > >& aSequence,
+        const css::uno::Reference< css::uno::XComponentContext >& rContext );
+
+    // writes two entries of type sequence<StringPair>
+    // the first sequence describes "Default" elements, where each element is described
+    // by StringPair object ( First - Extension, Second - ContentType )
+    // the second sequence describes "Override" elements, where each element is described
+    // by StringPair object ( First - PartName, Second - ContentType )
+    /// @throws css::uno::Exception
+    COMPHELPER_DLLPUBLIC
+    void WriteContentSequence(
+        const css::uno::Reference< css::io::XOutputStream >& xOutStream,
+        const css::uno::Sequence< css::beans::StringPair >& aDefaultsSequence,
+        const css::uno::Sequence< css::beans::StringPair >& aOverridesSequence,
+        const css::uno::Reference< css::uno::XComponentContext >& rContext );
+
+} // namespace comphelper::OFOPXMLHelper
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/oslfile2streamwrap.hxx b/include/comphelper/oslfile2streamwrap.hxx
new file mode 100644
index 000000000..c80c7b344
--- /dev/null
+++ b/include/comphelper/oslfile2streamwrap.hxx
@@ -0,0 +1,78 @@
+/* -*- 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_COMPHELPER_OSLFILE2STREAMWRAP_HXX
+#define INCLUDED_COMPHELPER_OSLFILE2STREAMWRAP_HXX
+
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <mutex>
+
+namespace osl { class File; }
+
+namespace comphelper
+{
+
+// Stream to read and write data, based on File
+
+class OSLInputStreamWrapper final : public ::cppu::WeakImplHelper<css::io::XInputStream>
+{
+public:
+    COMPHELPER_DLLPUBLIC OSLInputStreamWrapper(::osl::File& _rStream);
+
+private:
+    virtual ~OSLInputStreamWrapper() override;
+
+// css::io::XInputStream
+    virtual sal_Int32   SAL_CALL    readBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead) override;
+    virtual sal_Int32   SAL_CALL    readSomeBytes(css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead) override;
+    virtual void        SAL_CALL    skipBytes(sal_Int32 nBytesToSkip) override;
+    virtual sal_Int32   SAL_CALL    available() override;
+    virtual void        SAL_CALL    closeInput() override;
+
+    std::mutex      m_aMutex;
+    ::osl::File*    m_pFile;
+};
+
+
+// data sink for the files
+
+class OSLOutputStreamWrapper final : public ::cppu::WeakImplHelper<css::io::XOutputStream>
+{
+public:
+    COMPHELPER_DLLPUBLIC OSLOutputStreamWrapper(::osl::File& _rFile);
+
+private:
+    virtual ~OSLOutputStreamWrapper() override;
+
+// css::io::XOutputStream
+    virtual void SAL_CALL writeBytes(const css::uno::Sequence< sal_Int8 >& aData) override;
+    virtual void SAL_CALL flush() override;
+    virtual void SAL_CALL closeOutput() override;
+
+    ::osl::File&        rFile;
+};
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_OSLFILE2STREAMWRAP_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/parallelsort.hxx b/include/comphelper/parallelsort.hxx
new file mode 100644
index 000000000..94d86e0d1
--- /dev/null
+++ b/include/comphelper/parallelsort.hxx
@@ -0,0 +1,373 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_PARALLELSORT_HXX
+#define INCLUDED_COMPHELPER_PARALLELSORT_HXX
+
+#include <comphelper/threadpool.hxx>
+#include <tools/cpuid.hxx>
+
+#include <memory>
+#include <iterator>
+#include <thread>
+#include <algorithm>
+#include <cmath>
+#include <random>
+#include <functional>
+#include <iostream>
+#include <chrono>
+
+namespace comphelper
+{
+const size_t nThreadCountGlobal = std::thread::hardware_concurrency();
+const bool bHyperThreadingActive = cpuid::hasHyperThreading();
+static comphelper::ThreadPool& rTPool(comphelper::ThreadPool::getSharedOptimalPool());
+
+static thread_local std::mt19937 aGenerator{ std::random_device{}() };
+
+#define PARALLELSORT_ENABLEPZ 0
+
+namespace
+{
+class ProfileZone
+{
+public:
+#if PARALLELSORT_ENABLEPZ
+    ProfileZone(const char* pTag)
+        : maTag(pTag)
+        , maStart(std::chrono::steady_clock::now())
+        , mbFinished(false)
+    {
+    }
+
+    ~ProfileZone()
+    {
+        if (!mbFinished)
+            showTimeElapsed();
+    }
+
+    void stop()
+    {
+        showTimeElapsed();
+        mbFinished = true;
+    }
+#else
+    ProfileZone(const char* /*pTag*/)
+        : mbDummy(true)
+    {
+    }
+
+    void stop()
+    {
+        // Avoid loplugin:staticmethods, loplugin:staticaccess errors
+        (void)mbDummy;
+    }
+#endif
+
+private:
+#if PARALLELSORT_ENABLEPZ
+
+    void showTimeElapsed()
+    {
+        auto end = std::chrono::steady_clock::now();
+        size_t elapsed
+            = std::chrono::duration_cast<std::chrono::milliseconds>(end - maStart).count();
+        std::cout << maTag << " : " << elapsed << " ms" << std::endl << std::flush;
+    }
+
+    std::string maTag;
+    std::chrono::steady_clock::time_point maStart;
+    bool mbFinished;
+#else
+    bool mbDummy;
+
+#endif
+};
+
+class ParallelRunner
+{
+    class Executor final : public comphelper::ThreadTask
+    {
+    public:
+        Executor(const std::shared_ptr<comphelper::ThreadTaskTag>& rTag,
+                 std::function<void()> aFunc)
+            : comphelper::ThreadTask(rTag)
+            , maFunc(std::move(aFunc))
+        {
+        }
+
+        virtual void doWork() override { maFunc(); }
+
+    private:
+        const std::function<void()> maFunc;
+    };
+
+public:
+    ParallelRunner() { maTag = comphelper::ThreadPool::createThreadTaskTag(); }
+
+    void enqueue(std::function<void()> aFunc)
+    {
+        rTPool.pushTask(std::make_unique<Executor>(maTag, aFunc));
+    }
+
+    void wait() { rTPool.waitUntilDone(maTag, false); }
+
+private:
+    std::shared_ptr<comphelper::ThreadTaskTag> maTag;
+};
+
+constexpr size_t nMaxTreeArraySize = 64;
+
+size_t lcl_round_down_pow2(size_t nNum)
+{
+    size_t nPow2;
+    for (nPow2 = 1; nPow2 <= nNum; nPow2 <<= 1)
+        ;
+    return std::min((nPow2 >> 1), nMaxTreeArraySize);
+}
+
+template <class RandItr> struct Sampler
+{
+    using ValueType = typename std::iterator_traits<RandItr>::value_type;
+
+    static void sample(RandItr aBegin, RandItr aEnd, ValueType* pSamples, size_t nSamples,
+                       size_t /*nParallelism*/)
+    {
+        ProfileZone aZone("\tsample()");
+        assert(aBegin <= aEnd);
+        size_t nLen = static_cast<std::size_t>(aEnd - aBegin);
+        assert(std::mt19937::max() >= nLen);
+
+        for (size_t nIdx = 0; nIdx < nSamples; ++nIdx)
+        {
+            size_t nSel = aGenerator() % nLen--;
+            using namespace std;
+            swap(*(aBegin + nSel), *(aBegin + nLen));
+            pSamples[nIdx] = *(aBegin + nLen);
+        }
+    }
+};
+
+template <class RandItr, class Compare> class Binner
+{
+    using ValueType = typename std::iterator_traits<RandItr>::value_type;
+
+    const size_t mnTreeArraySize;
+    const size_t mnDividers;
+    constexpr static size_t mnMaxStaticSize = 1024 * 50;
+    uint8_t maLabels[mnMaxStaticSize];
+    ValueType maDividers[nMaxTreeArraySize];
+    std::unique_ptr<uint8_t[]> pLabels;
+    size_t maSepBinEnds[nMaxTreeArraySize * nMaxTreeArraySize];
+    bool mbThreaded;
+
+public:
+    size_t maBinEnds[nMaxTreeArraySize];
+
+    Binner(const ValueType* pSamples, size_t nSamples, size_t nBins, bool bThreaded)
+        : mnTreeArraySize(lcl_round_down_pow2(nBins))
+        , mnDividers(mnTreeArraySize - 1)
+        , mbThreaded(bThreaded)
+    {
+        assert((nSamples % mnTreeArraySize) == 0);
+        assert(mnTreeArraySize <= nMaxTreeArraySize);
+        std::fill(maBinEnds, maBinEnds + mnTreeArraySize, 0);
+        std::fill(maSepBinEnds, maSepBinEnds + mnTreeArraySize * mnTreeArraySize, 0);
+        fillTreeArray(1, pSamples, pSamples + nSamples);
+    }
+
+    void fillTreeArray(size_t nPos, const ValueType* pLow, const ValueType* pHigh)
+    {
+        assert(pLow <= pHigh);
+        const ValueType* pMid = pLow + (pHigh - pLow) / 2;
+        maDividers[nPos] = *pMid;
+
+        if (2 * nPos < mnDividers) // So that 2*nPos < mnTreeArraySize
+        {
+            fillTreeArray(2 * nPos, pLow, pMid);
+            fillTreeArray(2 * nPos + 1, pMid + 1, pHigh);
+        }
+    }
+
+    constexpr inline size_t findBin(const ValueType& rVal, Compare& aComp)
+    {
+        size_t nIdx = 1;
+        while (nIdx <= mnDividers)
+            nIdx = ((nIdx << 1) + aComp(maDividers[nIdx], rVal));
+        return (nIdx - mnTreeArraySize);
+    }
+
+    void label(const RandItr aBegin, const RandItr aEnd, Compare& aComp)
+    {
+        ProfileZone aZoneSetup("\tlabel():setup");
+        size_t nLen = static_cast<std::size_t>(aEnd - aBegin);
+        if (nLen > mnMaxStaticSize)
+            pLabels = std::make_unique<uint8_t[]>(nLen);
+        uint8_t* pLabelsRaw = (nLen > mnMaxStaticSize) ? pLabels.get() : maLabels;
+        aZoneSetup.stop();
+        ProfileZone aZoneFindBins("\tFindBins()");
+        if (mbThreaded)
+        {
+            ParallelRunner aPRunner;
+            const size_t nBins = mnTreeArraySize;
+            for (size_t nTIdx = 0; nTIdx < nBins; ++nTIdx)
+            {
+                aPRunner.enqueue([this, nTIdx, nBins, nLen, aBegin, pLabelsRaw, &aComp] {
+                    ProfileZone aZoneIn("\t\tFindBinsThreaded()");
+                    size_t nBinEndsStartIdx = nTIdx * mnTreeArraySize;
+                    size_t* pBinEnds = maSepBinEnds + nBinEndsStartIdx;
+                    size_t aBinEndsF[nMaxTreeArraySize] = { 0 };
+                    for (size_t nIdx = nTIdx; nIdx < nLen; nIdx += nBins)
+                    {
+                        size_t nBinIdx = findBin(*(aBegin + nIdx), aComp);
+                        pLabelsRaw[nIdx] = static_cast<uint8_t>(nBinIdx);
+                        ++aBinEndsF[nBinIdx];
+                    }
+
+                    for (size_t nIdx = 0; nIdx < mnTreeArraySize; ++nIdx)
+                        pBinEnds[nIdx] = aBinEndsF[nIdx];
+                });
+            }
+
+            aPRunner.wait();
+
+            // Populate maBinEnds from maSepBinEnds
+            for (size_t nTIdx = 0; nTIdx < mnTreeArraySize; ++nTIdx)
+            {
+                for (size_t nSepIdx = 0; nSepIdx < mnTreeArraySize; ++nSepIdx)
+                    maBinEnds[nTIdx] += maSepBinEnds[nSepIdx * mnTreeArraySize + nTIdx];
+            }
+        }
+        else
+        {
+            uint8_t* pLabel = pLabelsRaw;
+            for (RandItr aItr = aBegin; aItr != aEnd; ++aItr)
+            {
+                size_t nBinIdx = findBin(*aItr, aComp);
+                *pLabel++ = nBinIdx;
+                ++maBinEnds[nBinIdx];
+            }
+        }
+
+        aZoneFindBins.stop();
+
+        size_t nSum = 0;
+        // Store each bin's starting position in maBinEnds array for now.
+        for (size_t nIdx = 0; nIdx < mnTreeArraySize; ++nIdx)
+        {
+            size_t nSize = maBinEnds[nIdx];
+            maBinEnds[nIdx] = nSum;
+            nSum += nSize;
+        }
+
+        // Now maBinEnds has end positions of each bin.
+    }
+
+    void bin(const RandItr aBegin, const RandItr aEnd, ValueType* pOut)
+    {
+        ProfileZone aZone("\tbin()");
+        const size_t nLen = static_cast<std::size_t>(aEnd - aBegin);
+        uint8_t* pLabelsRaw = (nLen > mnMaxStaticSize) ? pLabels.get() : maLabels;
+        size_t nIdx;
+        for (nIdx = 0; nIdx < nLen; ++nIdx)
+        {
+            pOut[maBinEnds[pLabelsRaw[nIdx]]++] = *(aBegin + nIdx);
+        }
+    }
+};
+
+template <class RandItr, class Compare = std::less<>>
+void s3sort(const RandItr aBegin, const RandItr aEnd, Compare aComp = Compare(),
+            bool bThreaded = true)
+{
+    static size_t nThreadCount = nThreadCountGlobal;
+
+    constexpr size_t nBaseCaseSize = 1024;
+    const std::size_t nLen = static_cast<std::size_t>(aEnd - aBegin);
+    if (nLen < nBaseCaseSize)
+    {
+        std::sort(aBegin, aEnd, aComp);
+        return;
+    }
+
+    using ValueType = typename std::iterator_traits<RandItr>::value_type;
+    auto pOut = std::make_unique<ValueType[]>(nLen);
+
+    const size_t nBins = lcl_round_down_pow2(nThreadCount);
+    const size_t nOverSamplingFactor = std::max(1.0, std::sqrt(static_cast<double>(nLen) / 64));
+    const size_t nSamples = nOverSamplingFactor * nBins;
+    auto aSamples = std::make_unique<ValueType[]>(nSamples);
+    ProfileZone aZoneSampleAnsSort("SampleAndSort");
+    // Select samples and sort them
+    Sampler<RandItr>::sample(aBegin, aEnd, aSamples.get(), nSamples, nBins);
+    std::sort(aSamples.get(), aSamples.get() + nSamples, aComp);
+    aZoneSampleAnsSort.stop();
+
+    if (!aComp(aSamples[0], aSamples[nSamples - 1]))
+    {
+        // All samples are equal, fallback to standard sort.
+        std::sort(aBegin, aEnd, aComp);
+        return;
+    }
+
+    ProfileZone aZoneBinner("Binner");
+    // Create and populate bins using pOut from input iterators.
+    Binner<RandItr, Compare> aBinner(aSamples.get(), nSamples, nBins, bThreaded);
+    aBinner.label(aBegin, aEnd, aComp);
+    aBinner.bin(aBegin, aEnd, pOut.get());
+    aZoneBinner.stop();
+
+    ProfileZone aZoneSortBins("SortBins");
+    ValueType* pOutRaw = pOut.get();
+    if (bThreaded)
+    {
+        ParallelRunner aPRunner;
+        // Sort the bins separately.
+        for (size_t nBinIdx = 0, nBinStart = 0; nBinIdx < nBins; ++nBinIdx)
+        {
+            size_t nBinEnd = aBinner.maBinEnds[nBinIdx];
+            aPRunner.enqueue([pOutRaw, nBinStart, nBinEnd, &aComp] {
+                std::sort(pOutRaw + nBinStart, pOutRaw + nBinEnd, aComp);
+            });
+
+            nBinStart = nBinEnd;
+        }
+
+        aPRunner.wait();
+    }
+    else
+    {
+        for (size_t nBinIdx = 0, nBinStart = 0; nBinIdx < nBins; ++nBinIdx)
+        {
+            auto nBinEnd = aBinner.maBinEnds[nBinIdx];
+            std::sort(pOutRaw + nBinStart, pOutRaw + nBinEnd, aComp);
+            nBinStart = nBinEnd;
+        }
+    }
+
+    aZoneSortBins.stop();
+
+    // Move the sorted array to the array specified by input iterators.
+    std::move(pOutRaw, pOutRaw + nLen, aBegin);
+}
+
+} // anonymous namespace
+
+template <class RandItr, class Compare = std::less<>>
+void parallelSort(const RandItr aBegin, const RandItr aEnd, Compare aComp = Compare())
+{
+    assert(aBegin <= aEnd);
+    s3sort(aBegin, aEnd, aComp);
+}
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_PARALLELSORT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/processfactory.hxx b/include/comphelper/processfactory.hxx
new file mode 100644
index 000000000..0f74e5b13
--- /dev/null
+++ b/include/comphelper/processfactory.hxx
@@ -0,0 +1,72 @@
+/* -*- 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_COMPHELPER_PROCESSFACTORY_HXX
+#define INCLUDED_COMPHELPER_PROCESSFACTORY_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::lang {
+    class XMultiServiceFactory;
+}
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace comphelper
+{
+
+/**
+ * This function set the process service factory.
+ */
+COMPHELPER_DLLPUBLIC void setProcessServiceFactory(const css::uno::Reference< css::lang::XMultiServiceFactory >& xSMgr);
+
+/**
+ * This function gets the process service factory.
+ *
+ * If no service factory is set the function throws a RuntimeException.
+ */
+COMPHELPER_DLLPUBLIC css::uno::Reference< css::lang::XMultiServiceFactory > getProcessServiceFactory();
+
+/** Obtains a component context from a service factory.
+
+    Throws a RuntimeException if no component context can be obtained.
+
+    @param factory may be null
+    @return may be null
+ */
+COMPHELPER_DLLPUBLIC
+css::uno::Reference< css::uno::XComponentContext >
+getComponentContext(
+    css::uno::Reference< css::lang::XMultiServiceFactory >
+        const & factory);
+
+/**
+ * This function gets the process service factory's default component context.
+ *
+ * Throws a RuntimeException if no component context can be obtained.
+ */
+COMPHELPER_DLLPUBLIC
+css::uno::Reference< css::uno::XComponentContext >
+getProcessComponentContext();
+
+}
+
+#endif // INCLUDED_COMPHELPER_PROCESSFACTORY_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/profilezone.hxx b/include/comphelper/profilezone.hxx
new file mode 100644
index 000000000..71f9fa30b
--- /dev/null
+++ b/include/comphelper/profilezone.hxx
@@ -0,0 +1,92 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+*/
+
+#ifndef INCLUDED_COMPHELPER_PROFILEZONE_HXX
+#define INCLUDED_COMPHELPER_PROFILEZONE_HXX
+
+#include <sal/config.h>
+
+#include <sal/log.hxx>
+
+#include <comphelper/traceevent.hxx>
+
+// implementation of XToolkitExperimental profiling API
+
+namespace comphelper
+{
+class COMPHELPER_DLLPUBLIC ProfileZone : public NamedEvent
+{
+    long long m_nCreateTime;
+    int m_nNesting;
+
+    void addRecording();
+
+    static void setNestingLevel(int nNestingLevel);
+    static int getNestingLevel();
+
+    ProfileZone(const char* sName, const OUString& sArgs)
+        : NamedEvent(sName, sArgs)
+        , m_nNesting(-1)
+    {
+        if (s_bRecording)
+        {
+            m_nCreateTime = getNow();
+
+            m_nNesting = getNestingLevel();
+            setNestingLevel(getNestingLevel() + 1);
+        }
+        else
+            m_nCreateTime = 0;
+    }
+
+public:
+    /**
+     * Starts measuring the cost of a C++ scope.
+     *
+     * Note that the char pointer is stored as such in the ProfileZone object and used in the
+     * destructor, so be sure to pass a pointer that stays valid for the duration of the object's
+     * lifetime.
+     */
+    ProfileZone(const char* sName, const std::map<OUString, OUString>& aArgs)
+        : ProfileZone(sName, createArgsString(aArgs))
+    {
+    }
+
+    ProfileZone(const char* sName)
+        : ProfileZone(sName, OUString())
+    {
+    }
+
+    ~ProfileZone()
+    {
+        if (m_nCreateTime > 0)
+        {
+            setNestingLevel(getNestingLevel() - 1);
+
+            if (m_nNesting != getNestingLevel())
+            {
+                SAL_WARN("comphelper.traceevent", "Incorrect ProfileZone nesting for " << m_sName);
+            }
+            else
+            {
+                if (s_bRecording)
+                    addRecording();
+            }
+        }
+    }
+
+    ProfileZone(const ProfileZone&) = delete;
+    void operator=(const ProfileZone&) = delete;
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_PROFILEZONE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propagg.hxx b/include/comphelper/propagg.hxx
new file mode 100644
index 000000000..949251892
--- /dev/null
+++ b/include/comphelper/propagg.hxx
@@ -0,0 +1,325 @@
+/* -*- 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_COMPHELPER_PROPAGG_HXX
+#define INCLUDED_COMPHELPER_PROPAGG_HXX
+
+#include <config_options.h>
+#include <com/sun/star/beans/Property.hpp>
+#include <com/sun/star/beans/PropertyState.hpp>
+#include <com/sun/star/beans/XPropertiesChangeListener.hpp>
+#include <com/sun/star/beans/XVetoableChangeListener.hpp>
+#include <com/sun/star/lang/EventObject.hpp>
+#include <comphelper/propstate.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+#include <cstddef>
+#include <map>
+#include <memory>
+#include <vector>
+
+
+//= property helper classes
+
+
+namespace comphelper
+{
+
+
+//= OPropertyAccessor
+//= internal helper class for OPropertyArrayAggregationHelper
+
+namespace internal
+{
+    struct OPropertyAccessor
+    {
+        sal_Int32   nOriginalHandle;
+        std::size_t nPos;
+        bool        bAggregate;
+
+        OPropertyAccessor(sal_Int32 _nOriginalHandle, std::size_t _nPos, bool _bAggregate)
+            :nOriginalHandle(_nOriginalHandle) ,nPos(_nPos) ,bAggregate(_bAggregate) { }
+
+        bool operator==(const OPropertyAccessor& rOb) const { return nPos == rOb.nPos; }
+        bool operator <(const OPropertyAccessor& rOb) const { return nPos < rOb.nPos; }
+    };
+}
+
+
+/**
+ * used as callback for an OPropertyArrayAggregationHelper
+ */
+class IPropertyInfoService
+{
+public:
+    /** get the preferred handle for the given property
+        @param      _rName      the property name
+        @return                 the handle the property should be referred by, or -1 if there are no
+                                preferences for the given property
+    */
+    virtual sal_Int32           getPreferredPropertyId(const OUString& _rName) = 0;
+
+protected:
+    ~IPropertyInfoService() {}
+};
+
+/**
+ * used for implementing a cppu::IPropertyArrayHelper for classes
+ * aggregating property sets
+ */
+
+#define DEFAULT_AGGREGATE_PROPERTY_ID   10000
+
+class COMPHELPER_DLLPUBLIC OPropertyArrayAggregationHelper final : public ::cppu::IPropertyArrayHelper
+{
+    friend class OPropertySetAggregationHelper;
+
+    std::vector<css::beans::Property>         m_aProperties;
+    std::map< sal_Int32, internal::OPropertyAccessor > m_aPropertyAccessors;
+
+public:
+    /** construct the object.
+        @param  _rProperties    the properties of the object doing the aggregation. These properties
+                                are used without any checks, so the caller has to ensure that the names and
+                                handles are valid.
+        @param  _rAggProperties the properties of the aggregate, usually got via a call to getProperties on the
+                                XPropertySetInfo of the aggregate.
+                                The names of the properties are used without any checks, so the caller has to ensure
+                                that there are no doubles.
+                                The handles are stored for later quick access, but the outside-handles the
+                                aggregate properties get depend from the following two parameters.
+        @param  _pInfoService
+                                If not NULL, the object pointed to is used to calc handles which should be used
+                                for referring the aggregate's properties from outside.
+                                If one of the properties returned from the info service conflict with other handles
+                                already present (e.g. through _rProperties), the property is handled as if -1 was returned.
+                                If NULL (or, for a special property, a call to getPreferredPropertyId returns -1),
+                                the aggregate property(ies) get a new handle which they can be referred by from outside.
+        @param  _nFirstAggregateId
+                                if the object is about to create new handles for the aggregate properties, it uses
+                                id's ascending from this given id.
+                                No checks are made if the handle range determined by _nFirstAggregateId conflicts with other
+                                handles within _rProperties.
+    */
+    OPropertyArrayAggregationHelper(const css::uno::Sequence< css::beans::Property>& _rProperties,
+                                    const css::uno::Sequence< css::beans::Property>& _rAggProperties,
+                                    IPropertyInfoService* _pInfoService = nullptr,
+                                    sal_Int32 _nFirstAggregateId = DEFAULT_AGGREGATE_PROPERTY_ID);
+
+
+    /// inherited from IPropertyArrayHelper
+    virtual sal_Bool SAL_CALL fillPropertyMembersByHandle( OUString* _pPropName, sal_Int16* _pAttributes,
+                                            sal_Int32 _nHandle) override ;
+
+    /// inherited from IPropertyArrayHelper
+    virtual css::uno::Sequence< css::beans::Property> SAL_CALL getProperties() override;
+    /// inherited from IPropertyArrayHelper
+    virtual css::beans::Property SAL_CALL getPropertyByName(const OUString& _rPropertyName) override;
+
+    /// inherited from IPropertyArrayHelper
+    virtual sal_Bool  SAL_CALL hasPropertyByName(const OUString& _rPropertyName) override ;
+    /// inherited from IPropertyArrayHelper
+    virtual sal_Int32 SAL_CALL getHandleByName(const OUString & _rPropertyName) override;
+    /// inherited from IPropertyArrayHelper
+    virtual sal_Int32 SAL_CALL fillHandles( /*out*/sal_Int32* _pHandles, const css::uno::Sequence< OUString >& _rPropNames ) override;
+
+    /** returns information about a property of the aggregate.
+        @param  _pPropName          points to a string to receive the property name. No name is returned if this is NULL.
+        @param  _pOriginalHandle    points to a sal_Int32 to receive the original property handle. No original handle is returned
+                                    if this is NULL.
+        @param  _nHandle            the handle of the property as got by, for instance, fillHandles
+
+        @return sal_True, if _nHandle marks an aggregate property, otherwise sal_False
+    */
+    bool fillAggregatePropertyInfoByHandle(OUString* _pPropName, sal_Int32* _pOriginalHandle,
+                                                   sal_Int32 _nHandle) const;
+
+    /** returns information about a property given by handle
+    */
+    bool getPropertyByHandle( sal_Int32 _nHandle, css::beans::Property& _rProperty ) const;
+
+
+    enum class PropertyOrigin
+    {
+        Aggregate,
+        Delegator,
+        Unknown
+    };
+    /** prefer this one over the XPropertySetInfo of the aggregate!
+
+        <p>The reason is that OPropertyArrayAggregationHelper is the only instance which really knows
+        which properties of the aggregate are to be exposed. <br/>
+
+        For instance, some derivee of OPropertySetAggregationHelper may decide to create an
+        OPropertyArrayAggregationHelper which contains only a subset of the aggregate properties. This way,
+        some of the aggregate properties may be hidden to the public.<br/>
+
+        When using the XPropertySetInfo of the aggregate set to determine the existence of a property, then this
+        would return false positives.</p>
+    */
+    PropertyOrigin  classifyProperty( const OUString& _rName );
+
+private:
+    const css::beans::Property* findPropertyByName(const OUString& _rName) const;
+};
+
+
+namespace internal
+{
+    class PropertyForwarder;
+}
+
+/**
+ * helper class for implementing the property-set-related interfaces
+ * for an object doin' aggregation
+ * supports at least XPropertySet and XMultiPropertySet
+ *
+ */
+class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OPropertySetAggregationHelper    :public OPropertyStateHelper
+                                    ,public css::beans::XPropertiesChangeListener
+                                    ,public css::beans::XVetoableChangeListener
+{
+    friend class internal::PropertyForwarder;
+
+protected:
+    css::uno::Reference< css::beans::XPropertyState>      m_xAggregateState;
+    css::uno::Reference< css::beans::XPropertySet>        m_xAggregateSet;
+    css::uno::Reference< css::beans::XMultiPropertySet>   m_xAggregateMultiSet;
+    css::uno::Reference< css::beans::XFastPropertySet>    m_xAggregateFastSet;
+
+    std::unique_ptr<internal::PropertyForwarder>          m_pForwarder;
+    bool                            m_bListening : 1;
+
+public:
+    OPropertySetAggregationHelper( ::cppu::OBroadcastHelper& rBHelper );
+
+    virtual css::uno::Any SAL_CALL queryInterface(const css::uno::Type& aType) override;
+
+// XEventListener
+    virtual void SAL_CALL disposing(const css::lang::EventObject& Source) override;
+
+// XFastPropertySet
+    virtual void SAL_CALL setFastPropertyValue(sal_Int32 nHandle, const css::uno::Any& aValue) override;
+    virtual css::uno::Any SAL_CALL getFastPropertyValue(sal_Int32 nHandle) override;
+
+// XPropertySet
+    virtual void SAL_CALL           addPropertyChangeListener(const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener) override;
+    virtual void SAL_CALL           addVetoableChangeListener(const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener) override;
+
+// XPropertiesChangeListener
+    virtual void SAL_CALL propertiesChange(const css::uno::Sequence< css::beans::PropertyChangeEvent >& evt) override;
+
+// XVetoableChangeListener
+    virtual void SAL_CALL vetoableChange(const css::beans::PropertyChangeEvent& aEvent) override;
+
+// XMultiPropertySet
+    virtual void SAL_CALL   setPropertyValues(const css::uno::Sequence< OUString >& PropertyNames, const css::uno::Sequence< css::uno::Any >& Values) override;
+    virtual void SAL_CALL   addPropertiesChangeListener(const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener) override;
+
+// XPropertyState
+    virtual css::beans::PropertyState SAL_CALL getPropertyState(const OUString& PropertyName) override;
+    virtual void SAL_CALL                                   setPropertyToDefault(const OUString& PropertyName) override;
+    virtual css::uno::Any SAL_CALL             getPropertyDefault(const OUString& aPropertyName) override;
+
+// OPropertySetHelper
+    /** still waiting to be overwritten ...
+        you <B>must<B/> use an OPropertyArrayAggregationHelper here, as the implementation strongly relies on this.
+    */
+    virtual ::cppu::IPropertyArrayHelper& SAL_CALL getInfoHelper() override = 0;
+
+    /** only implemented for "forwarded" properties, every other property must be handled
+        in the derivee, and will assert if passed herein
+    */
+    virtual sal_Bool SAL_CALL convertFastPropertyValue( css::uno::Any& _rConvertedValue, css::uno::Any& _rOldValue, sal_Int32 _nHandle, const css::uno::Any& _rValue ) override;
+
+    /** only implemented for "forwarded" properties, every other property must be handled
+        in the derivee, and will assert if passed herein
+    */
+    virtual void SAL_CALL setFastPropertyValue_NoBroadcast( sal_Int32 _nHandle, const css::uno::Any& _rValue ) override;
+
+protected:
+    virtual ~OPropertySetAggregationHelper() override;
+
+    virtual void SAL_CALL getFastPropertyValue(css::uno::Any& rValue, sal_Int32 nHandle) const override;
+    void disposing();
+
+    sal_Int32       getOriginalHandle( sal_Int32 _nHandle ) const;
+    OUString getPropertyName( sal_Int32 _nHandle ) const;
+
+    /** declares the property with the given (public) handle as one to be forwarded to the aggregate
+
+        Sometimes, you might want to <em>overwrite</em> properties at the aggregate. That is,
+        though the aggregate implements this property, and still is to hold the property value,
+        you want to do additional handling upon setting the property, but then forward the value
+        to the aggregate.
+
+        Use this method to declare such properties.
+
+        When a "forwarded property" is set from outside, the class first calls
+        <member>forwardingPropertyValue</member> for any preprocessing, then forwards the property
+        value to the aggregate, and then calls <member>forwardedPropertyValue</member>.
+
+        When you declare a property as "forwarded", the class takes care for some multi-threading
+        issues, for instance, it won't fire any property change notifications which result from
+        forwarding a property value, unless it's safe to do so (i.e. unless our mutex is
+        released).
+
+        @see forwardingPropertyValue
+        @see forwardedPropertyValue
+    */
+    void declareForwardedProperty( sal_Int32 _nHandle );
+
+    /** checks whether we're actually forwarding a property value to our aggregate
+
+        @see declareForwardedProperty
+        @see forwardingPropertyValue
+        @see forwardedPropertyValue
+    */
+    bool    isCurrentlyForwardingProperty( sal_Int32 _nHandle ) const;
+
+    /** called immediately before a property value which is overwritten in this instance
+        is forwarded to the aggregate
+
+        @see declareForwardedProperty
+        @see forwardedPropertyValue
+    */
+    virtual void forwardingPropertyValue( sal_Int32 _nHandle );
+
+    /** called immediately after a property value which is overwritten in this instance
+        has been forwarded to the aggregate
+
+        @see declareForwardedProperty
+        @see forwardingPropertyValue
+    */
+    virtual void forwardedPropertyValue( sal_Int32 _nHandle );
+
+    /// must be called before aggregation, if aggregation is used
+    ///
+    /// @throws css::lang::IllegalArgumentException
+    void setAggregation(const css::uno::Reference< css::uno::XInterface >&);
+    void startListening();
+};
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPAGG_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/proparrhlp.hxx b/include/comphelper/proparrhlp.hxx
new file mode 100644
index 000000000..5db95972f
--- /dev/null
+++ b/include/comphelper/proparrhlp.hxx
@@ -0,0 +1,141 @@
+/* -*- 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_COMPHELPER_PROPARRHLP_HXX
+#define INCLUDED_COMPHELPER_PROPARRHLP_HXX
+
+#include <comphelper/propagg.hxx>
+#include <cppuhelper/propshlp.hxx>
+#include <mutex>
+#include <osl/diagnose.h>
+
+namespace comphelper
+{
+
+template <class TYPE>
+class OPropertyArrayUsageHelper
+{
+protected:
+    static sal_Int32                        s_nRefCount;
+    static ::cppu::IPropertyArrayHelper*    s_pProps;
+    static std::mutex& theMutex()
+    {
+        static std::mutex SINGLETON;
+        return SINGLETON;
+    }
+public:
+    OPropertyArrayUsageHelper();
+    virtual ~OPropertyArrayUsageHelper();
+
+    /** call this in the getInfoHelper method of your derived class. The method returns the array helper of the
+        class, which is created if necessary.
+    */
+    ::cppu::IPropertyArrayHelper*   getArrayHelper();
+
+protected:
+    /** used to implement the creation of the array helper which is shared amongst all instances of the class.
+        This method needs to be implemented in derived classes.
+        <BR>
+        The method gets called with Mutex acquired.
+        @return                         a pointer to the newly created array helper. Must not be NULL.
+    */
+    virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const = 0;
+};
+
+/** an OPropertyArrayUsageHelper which will create an OPropertyArrayAggregationHelper
+*/
+template <class TYPE>
+class OAggregationArrayUsageHelper: public OPropertyArrayUsageHelper<TYPE>
+{
+protected:
+    /** overwrite this in your derived class. initialize the two sequences with your and your aggregate's
+        properties.
+        <BR>
+        The method gets called with Mutex acquired.
+        @param      _rProps             out parameter to be filled with the property descriptions of your own class
+        @param      _rAggregateProps    out parameter to be filled with the properties of your aggregate.
+    */
+    virtual void fillProperties(
+        css::uno::Sequence< css::beans::Property >& /* [out] */ _rProps,
+        css::uno::Sequence< css::beans::Property >& /* [out] */ _rAggregateProps
+        ) const = 0;
+
+    /** creates an OPropertyArrayAggregationHelper filled with properties for which's initialization
+        fillProperties is called. getInfoService and getFirstAggregateId may be overwritten to determine
+        the additional parameters of the OPropertyArrayAggregationHelper.
+    */
+    virtual ::cppu::IPropertyArrayHelper* createArrayHelper( ) const;
+};
+
+template<class TYPE>
+sal_Int32                       OPropertyArrayUsageHelper< TYPE >::s_nRefCount  = 0;
+
+template<class TYPE>
+::cppu::IPropertyArrayHelper*   OPropertyArrayUsageHelper< TYPE >::s_pProps = nullptr;
+
+template <class TYPE>
+OPropertyArrayUsageHelper<TYPE>::OPropertyArrayUsageHelper()
+{
+    std::unique_lock aGuard(theMutex());
+    ++s_nRefCount;
+}
+
+template <class TYPE>
+OPropertyArrayUsageHelper<TYPE>::~OPropertyArrayUsageHelper()
+{
+    std::unique_lock aGuard(theMutex());
+    OSL_ENSURE(s_nRefCount > 0, "OPropertyArrayUsageHelper::~OPropertyArrayUsageHelper : suspicious call : have a refcount of 0 !");
+    if (!--s_nRefCount)
+    {
+        delete s_pProps;
+        s_pProps = nullptr;
+    }
+}
+
+template <class TYPE>
+::cppu::IPropertyArrayHelper* OPropertyArrayUsageHelper<TYPE>::getArrayHelper()
+{
+    OSL_ENSURE(s_nRefCount, "OPropertyArrayUsageHelper::getArrayHelper : suspicious call : have a refcount of 0 !");
+    if (!s_pProps)
+    {
+        std::unique_lock aGuard(theMutex());
+        if (!s_pProps)
+        {
+            s_pProps = createArrayHelper();
+            OSL_ENSURE(s_pProps, "OPropertyArrayUsageHelper::getArrayHelper : createArrayHelper returned nonsense !");
+        }
+    }
+    return s_pProps;
+}
+
+template <class TYPE> inline
+::cppu::IPropertyArrayHelper* OAggregationArrayUsageHelper<TYPE>::createArrayHelper() const
+{
+    css::uno::Sequence< css::beans::Property > aProps;
+    css::uno::Sequence< css::beans::Property > aAggregateProps;
+    fillProperties(aProps, aAggregateProps);
+    OSL_ENSURE(aProps.hasElements(), "OAggregationArrayUsageHelper::createArrayHelper : fillProperties returned nonsense !");
+    return new OPropertyArrayAggregationHelper(aProps, aAggregateProps, nullptr, DEFAULT_AGGREGATE_PROPERTY_ID);
+}
+
+}
+
+#endif // INCLUDED_COMPHELPER_PROPARRHLP_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/property.hxx b/include/comphelper/property.hxx
new file mode 100644
index 000000000..b9787f130
--- /dev/null
+++ b/include/comphelper/property.hxx
@@ -0,0 +1,131 @@
+/* -*- 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_COMPHELPER_PROPERTY_HXX
+#define INCLUDED_COMPHELPER_PROPERTY_HXX
+
+#include <cppuhelper/proptypehlp.hxx>
+#include <comphelper/extract.hxx>
+#include <com/sun/star/beans/Property.hpp>
+#include <type_traits>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::beans { class XPropertySet; }
+
+namespace comphelper
+{
+
+    // comparing two property instances
+    struct PropertyCompareByName
+    {
+        bool operator() (const css::beans::Property& x, const css::beans::Property& y) const
+        {
+            return x.Name.compareTo(y.Name) < 0;
+        }
+    };
+
+/// remove the property with the given name from the given sequence
+COMPHELPER_DLLPUBLIC void RemoveProperty(css::uno::Sequence<css::beans::Property>& seqProps, const OUString& _rPropName);
+
+/** within the given property sequence, modify attributes of a special property
+    @param  _rProps         the sequence of properties to search in
+    @param  _sPropName      the name of the property which's attributes should be modified
+    @param  _nAddAttrib     the attributes which should be added
+    @param  _nRemoveAttrib  the attributes which should be removed
+*/
+COMPHELPER_DLLPUBLIC void ModifyPropertyAttributes(css::uno::Sequence<css::beans::Property>& _rProps, const OUString& _sPropName, sal_Int16 _nAddAttrib, sal_Int16 _nRemoveAttrib);
+
+/** check if the given set has the given property.
+*/
+COMPHELPER_DLLPUBLIC bool hasProperty(const OUString& _rName, const css::uno::Reference<css::beans::XPropertySet>& _rxSet);
+
+/** copy properties between property sets, in compliance with the property
+    attributes of the target object
+*/
+COMPHELPER_DLLPUBLIC void copyProperties(const css::uno::Reference<css::beans::XPropertySet>& _rxSource,
+                    const css::uno::Reference<css::beans::XPropertySet>& _rxDest);
+
+/** helper for implementing ::cppu::OPropertySetHelper::convertFastPropertyValue
+    @param          _rConvertedValue    the conversion result (if successful)
+    @param          _rOldValue          the old value of the property, calculated from _rCurrentValue
+    @param          _rValueToSet        the new value which is about to be set
+    @param          _rCurrentValue      the current value of the property
+    @return         sal_True, if the value could be converted and has changed
+                    sal_False, if the value could be converted and has not changed
+    @exception      InvalidArgumentException thrown if the value could not be converted to the requested type (which is the template argument)
+*/
+template <typename T>
+bool tryPropertyValue(css::uno::Any& /*out*/_rConvertedValue, css::uno::Any& /*out*/_rOldValue, const css::uno::Any& _rValueToSet, const T& _rCurrentValue)
+{
+    bool bModified(false);
+    T aNewValue = T();
+    ::cppu::convertPropertyValue(aNewValue, _rValueToSet);
+    if (aNewValue != _rCurrentValue)
+    {
+        _rConvertedValue <<= aNewValue;
+        _rOldValue <<= _rCurrentValue;
+        bModified = true;
+    }
+    return bModified;
+}
+
+/** helper for implementing ::cppu::OPropertySetHelper::convertFastPropertyValue for enum values
+    @param          _rConvertedValue    the conversion result (if successful)
+    @param          _rOldValue          the old value of the property, calculated from _rCurrentValue
+    @param          _rValueToSet        the new value which is about to be set
+    @param          _rCurrentValue      the current value of the property
+    @return         sal_True, if the value could be converted and has changed
+                    sal_False, if the value could be converted and has not changed
+    @exception      InvalidArgumentException thrown if the value could not be converted to the requested type (which is the template argument)
+*/
+template <class ENUMTYPE>
+typename std::enable_if<std::is_enum<ENUMTYPE>::value, bool>::type
+tryPropertyValueEnum(css::uno::Any& /*out*/_rConvertedValue, css::uno::Any& /*out*/_rOldValue, const css::uno::Any& _rValueToSet, const ENUMTYPE& _rCurrentValue)
+{
+    bool bModified(false);
+    ENUMTYPE aNewValue;
+    ::cppu::any2enum(aNewValue, _rValueToSet);
+        // will throw an exception if not convertible
+
+    if (aNewValue != _rCurrentValue)
+    {
+        _rConvertedValue <<= aNewValue;
+        _rOldValue <<= _rCurrentValue;
+        bModified = true;
+    }
+    return bModified;
+}
+
+/** helper for implementing ::cppu::OPropertySetHelper::convertFastPropertyValue
+    @param          _rConvertedValue    the conversion result (if successful)
+    @param          _rOldValue          the old value of the property, calculated from _rCurrentValue
+    @param          _rValueToSet        the new value which is about to be set
+    @param          _rCurrentValue      the current value of the property
+    @param          _rExpectedType      the type which the property should have (if not void)
+    @return         sal_True, if the value could be converted and has changed
+                    sal_False, if the value could be converted and has not changed
+    @exception      InvalidArgumentException thrown if the value could not be converted to the requested type (which is the template argument)
+*/
+COMPHELPER_DLLPUBLIC bool tryPropertyValue(css::uno::Any& _rConvertedValue, css::uno::Any& _rOldValue, const css::uno::Any& _rValueToSet, const css::uno::Any& _rCurrentValue, const css::uno::Type& _rExpectedType);
+
+}
+
+#endif // INCLUDED_COMPHELPER_PROPERTY_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertybag.hxx b/include/comphelper/propertybag.hxx
new file mode 100644
index 000000000..3cf9de9ff
--- /dev/null
+++ b/include/comphelper/propertybag.hxx
@@ -0,0 +1,226 @@
+/* -*- 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_COMPHELPER_PROPERTYBAG_HXX
+#define INCLUDED_COMPHELPER_PROPERTYBAG_HXX
+
+#include <config_options.h>
+#include <com/sun/star/uno/Any.h>
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/propertycontainerhelper.hxx>
+
+#include <map>
+
+
+namespace comphelper
+{
+
+
+    //= PropertyBag
+
+    /** provides a bag of properties associated with their values
+
+        This class can, for instance, be used for components which need to implement
+        the com.sun.star.beans.PropertyBag service.
+    */
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) PropertyBag final : protected OPropertyContainerHelper
+    {
+        std::map< sal_Int32, css::uno::Any > aDefaults;
+        bool m_bAllowEmptyPropertyName;
+    public:
+        PropertyBag();
+        virtual ~PropertyBag();
+
+        /** allow adding property with empty string as name
+            (by default, such names are rejected with IllegalActionException).
+            @param i_isAllowed
+                iff true, empty property name will be allowed
+         */
+        void setAllowEmptyPropertyName(bool i_isAllowed);
+
+        /** adds a property to the bag
+
+            The type of the property is determined from its initial value (<code>_rInitialValue</code>).
+
+            @param _rName
+                the name of the new property. Must not be empty unless
+                explicitly allowed with setAllowEmptyPropertyName.
+            @param _nHandle
+                the handle of the new property
+            @param _nAttributes
+                the attributes of the property
+            @param _rInitialValue
+                the initial value of the property. Must not be <NULL/>, to allow
+                determining the property type.
+
+            @throws css::beans::IllegalTypeException
+                if the initial value is <NULL/>
+            @throws css::beans::PropertyExistException
+                if the name or the handle are already used
+            @throws css::beans::IllegalArgumentException
+                if the name is empty
+        */
+        void    addProperty(
+                    const OUString& _rName,
+                    sal_Int32 _nHandle,
+                    sal_Int32 _nAttributes,
+                    const css::uno::Any& _rInitialValue
+                );
+
+        /** adds a property to the bag
+
+            The initial value of the property is <NULL/>.
+
+            @param _rName
+                the name of the new property. Must not be empty unless
+                explicitly allowed with setAllowEmptyPropertyName.
+            @param _rType
+                the type of the new property
+            @param _nHandle
+                the handle of the new property
+            @param _nAttributes
+                the attributes of the property
+
+            @throws css::beans::IllegalTypeException
+                if the initial value is <NULL/>
+            @throws css::beans::PropertyExistException
+                if the name or the handle are already used
+            @throws css::beans::IllegalArgumentException
+                if the name is empty
+        */
+        void    addVoidProperty(
+                    const OUString& _rName,
+                    const css::uno::Type& _rType,
+                    sal_Int32 _nHandle,
+                    sal_Int32 _nAttributes
+                );
+
+        /** removes a property from the bag
+            @param _rName
+                the name of the to-be-removed property.
+            @throws UnknownPropertyException
+                if the bag does not contain a property with the given name
+            @throws NotRemoveableException
+                if the property with the given name is not removable, as indicated
+                by the property attributes used in a previous <code>addProperty</code>
+                call.
+        */
+        void    removeProperty(
+                    const OUString& _rName
+                );
+
+        /** describes all properties in the bag
+            @param _out_rProps
+                takes, upon return, the descriptions of all properties in the bag
+        */
+        void describeProperties(
+                    css::uno::Sequence< css::beans::Property >& _out_rProps
+                ) const
+        {
+            OPropertyContainerHelper::describeProperties( _out_rProps );
+        }
+
+        /** retrieves the value of a property given by handle
+            @param _nHandle
+                the handle of the property whose value is to be retrieved
+            @param _out_rValue
+                output parameter taking the property value
+            @throws UnknownPropertyException
+                if the given handle does not denote a property in the bag
+        */
+        void    getFastPropertyValue(
+                    sal_Int32 _nHandle,
+                    css::uno::Any& _out_rValue
+                ) const;
+
+        /** converts a to-be-set value of a property (given by handle) so that it can
+            be used in subsequent calls to setFastPropertyValue
+            @param _nHandle
+                the handle of the property
+            @param _rNewValue
+                the new value, which should be converted
+            @param _out_rConvertedValue
+                output parameter taking the converted value
+            @param _out_rCurrentValue
+                output parameter taking the current value of the
+                property
+            @throws UnknownPropertyException
+                if the given handle does not denote a property in the bag
+            @throws IllegalArgumentException
+                if the given value cannot be lossless converted into a value
+                for the given property.
+        */
+        bool    convertFastPropertyValue(
+                        sal_Int32 _nHandle,
+                        const css::uno::Any& _rNewValue,
+                        css::uno::Any& _out_rConvertedValue,
+                        css::uno::Any& _out_rCurrentValue
+                    ) const;
+
+        /** sets a new value for a property given by handle
+            @throws UnknownPropertyException
+                if the given handle does not denote a property in the bag
+        */
+        void    setFastPropertyValue(
+                        sal_Int32 _nHandle,
+                        const css::uno::Any& _rValue
+                    );
+
+        /** returns the default value for a property given by handle
+
+            The default value of a property is its initial value, as passed
+            to ->addProperty.
+
+            @param _nHandle
+                handle of the property whose default value is to be obtained
+            @param _out_rValue
+                the default value
+            @throws UnknownPropertyException
+                if the given handle does not denote a property in the bag
+        */
+        void    getPropertyDefaultByHandle(
+                        sal_Int32 _nHandle,
+                        css::uno::Any& _out_rValue
+                    ) const;
+
+        /** determines whether a property with a given name is part of the bag
+        */
+        bool    hasPropertyByName( const OUString& _rName ) const
+        {
+            return isRegisteredProperty( _rName );
+        }
+
+        /** determines whether a property with a given handle is part of the bag
+        */
+        bool    hasPropertyByHandle( sal_Int32 _nHandle ) const
+        {
+            return isRegisteredProperty( _nHandle );
+        }
+    protected:
+        using OPropertyContainerHelper::convertFastPropertyValue;
+        using OPropertyContainerHelper::getFastPropertyValue;
+    };
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPERTYBAG_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertycontainer.hxx b/include/comphelper/propertycontainer.hxx
new file mode 100644
index 000000000..2c64b2cdf
--- /dev/null
+++ b/include/comphelper/propertycontainer.hxx
@@ -0,0 +1,87 @@
+/* -*- 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_COMPHELPER_PROPERTYCONTAINER_HXX
+#define INCLUDED_COMPHELPER_PROPERTYCONTAINER_HXX
+
+#include <comphelper/propertycontainerhelper.hxx>
+#include <cppuhelper/propshlp.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+
+namespace com::sun::star::uno { class Any; }
+namespace com::sun::star::uno { class Type; }
+
+namespace comphelper
+{
+
+
+/** an OPropertySetHelper implementation which is just a simple container for properties represented
+    by class members, usually in a derived class.
+    <BR>
+    A restriction of this class is that no value conversions are made on a setPropertyValue call. Though
+    the base class supports this with the convertFastPropertyValue method, the OPropertyContainer accepts only
+    values which already have the correct type, it's unable to convert, for instance, a long to a short.
+*/
+class COMPHELPER_DLLPUBLIC OPropertyContainer
+            :public cppu::OPropertySetHelper
+            ,public OPropertyContainerHelper
+{
+public:
+    // this dtor is needed otherwise we can get a wrong delete operator
+    virtual ~OPropertyContainer();
+
+protected:
+    OPropertyContainer(::cppu::OBroadcastHelper& _rBHelper);
+
+    /// for scripting : the types of the interfaces supported by this class
+    ///
+    /// @throws css::uno::RuntimeException
+    static css::uno::Sequence< css::uno::Type > getBaseTypes();
+
+// OPropertySetHelper overridables
+    virtual sal_Bool SAL_CALL convertFastPropertyValue(
+                            css::uno::Any & rConvertedValue,
+                            css::uno::Any & rOldValue,
+                            sal_Int32 nHandle,
+                            const css::uno::Any& rValue ) override;
+
+    virtual void SAL_CALL   setFastPropertyValue_NoBroadcast(
+                                sal_Int32 nHandle,
+                                const css::uno::Any& rValue
+                            ) override;
+
+    using OPropertySetHelper::getFastPropertyValue;
+    virtual void SAL_CALL getFastPropertyValue(
+                                css::uno::Any& rValue,
+                                sal_Int32 nHandle
+                                     ) const override;
+
+    // disambiguate a base class method (XFastPropertySet)
+    using OPropertySetHelper::setFastPropertyValue;
+};
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPERTYCONTAINER_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertycontainerhelper.hxx b/include/comphelper/propertycontainerhelper.hxx
new file mode 100644
index 000000000..73a0ce513
--- /dev/null
+++ b/include/comphelper/propertycontainerhelper.hxx
@@ -0,0 +1,197 @@
+/* -*- 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_COMPHELPER_PROPERTYCONTAINERHELPER_HXX
+#define INCLUDED_COMPHELPER_PROPERTYCONTAINERHELPER_HXX
+
+#include <com/sun/star/uno/Type.hxx>
+#include <com/sun/star/beans/Property.hpp>
+#include <cstddef>
+#include <limits>
+#include <vector>
+#include <comphelper/comphelperdllapi.h>
+
+
+namespace comphelper
+{
+
+
+// infos about one single property
+struct COMPHELPER_DLLPUBLIC PropertyDescription
+{
+    // the possibilities where a property holding object may be located
+    enum class LocationType
+    {
+        DerivedClassRealType,     // within the derived class, it's a "real" (non-Any) type
+        DerivedClassAnyType,      // within the derived class, it's a com.sun.star.uno::Any
+        HoldMyself                // within m_aHoldProperties
+    };
+    // the location of an object holding a property value :
+    union LocationAccess
+    {
+        void*       pDerivedClassMember;        // a pointer to a member of an object of a derived class
+        std::size_t nOwnClassVectorIndex;       // an index within m_aHoldProperties
+    };
+
+    css::beans::Property aProperty;
+    LocationType         eLocated;       // where is the object containing the value located ?
+    LocationAccess       aLocation;      // access to the property value
+
+    PropertyDescription()
+        :aProperty( OUString(), -1, css::uno::Type(), 0 )
+        ,eLocated( LocationType::HoldMyself )
+    {
+        aLocation.nOwnClassVectorIndex = std::numeric_limits<std::size_t>::max();
+    }
+};
+
+
+//= OPropertyContainerHelper
+
+/** helper class for managing property values, and implementing most of the X*Property* interfaces
+
+    The property values are usually held in derived classes, but can also be given to the
+    responsibility of this class here.
+
+    For more information, see http://wiki.openoffice.org/wiki/Development/Cpp/Helper/PropertyContainerHelper.
+*/
+class COMPHELPER_DLLPUBLIC OPropertyContainerHelper
+{
+    typedef ::std::vector< css::uno::Any >              PropertyContainer;
+    PropertyContainer   m_aHoldProperties;
+        // the properties which are hold by this class' instance, not the derived one's
+
+private:
+    typedef ::std::vector< PropertyDescription >    Properties;
+    typedef Properties::iterator                    PropertiesIterator;
+    typedef Properties::const_iterator              ConstPropertiesIterator;
+    Properties      m_aProperties;
+
+protected:
+    OPropertyContainerHelper();
+    ~OPropertyContainerHelper();
+
+    /** register a property. The property is represented through a member of the derived class which calls
+        this method.
+        @param      _rName              the name of the property
+        @param      _nHandle            the handle of the property
+        @param      _nAttributes        the attributes of the property
+        @param      _pPointerToMember   the pointer to the member representing the property
+                                        within the derived class.
+        @param      _rMemberType        the cppu type of the property represented by the object
+                                        to which _pPointerToMember points.
+    */
+    void    registerProperty(const OUString& _rName, sal_Int32 _nHandle, sal_Int32 _nAttributes,
+        void* _pPointerToMember, const css::uno::Type& _rMemberType);
+
+
+    /** register a property. The property is represented through a css::uno::Any member of the
+        derived class which calls this method.
+        @param      _rName              the name of the property
+        @param      _nHandle            the handle of the property
+        @param      _nAttributes        the attributes of the property
+        @param      _pPointerToMember   the pointer to the member representing the property
+                                        within the derived class, which has to be a css::uno::Any.
+        @param      _rExpectedType      the expected type of the property. NOT the type of the object to which
+                                        _pPointerToMember points (this is always an Any).
+    */
+    void    registerMayBeVoidProperty(const OUString& _rName, sal_Int32 _nHandle, sal_Int32 _nAttributes,
+        css::uno::Any* _pPointerToMember, const css::uno::Type& _rExpectedType);
+
+    /** register a property. The repository will create an own object holding this property, so there is no
+        need to declare an extra member in your derived class
+        @param      _rName              the name of the property
+        @param      _nHandle            the handle of the property
+        @param      _nAttributes        the attributes of the property
+        @param      _rType              the type of the property
+        @param      _pInitialValue      the initial value of the property. May be void if _nAttributes includes
+                                        the css::beans::PropertyAttribute::MAYBEVOID flag.
+                                        Else it must contain a value compatible with the type described by _rType.
+    */
+    void    registerPropertyNoMember(const OUString& _rName, sal_Int32 _nHandle, sal_Int32 _nAttributes,
+        const css::uno::Type& _rType, css::uno::Any const & _pInitialValue);
+
+    /** revokes a previously registered property
+        @throw  css::beans::UnknownPropertyException
+            if no property with the given handle is registered
+    */
+    void    revokeProperty( sal_Int32 _nHandle );
+
+
+    /// checks whether a property with the given handle has been registered
+    bool    isRegisteredProperty( sal_Int32 _nHandle ) const;
+
+    /// checks whether a property with the given name has been registered
+    bool    isRegisteredProperty( const OUString& _rName ) const;
+
+
+    // helper for implementing OPropertySetHelper overridables
+    bool    convertFastPropertyValue(
+                    css::uno::Any & rConvertedValue,
+                    css::uno::Any & rOldValue,
+                    sal_Int32 nHandle,
+                    const css::uno::Any& rValue
+                );
+
+    void        setFastPropertyValue(
+                        sal_Int32 nHandle,
+                        const css::uno::Any& rValue
+                    );
+
+    void        getFastPropertyValue(
+                        css::uno::Any& rValue,
+                        sal_Int32 nHandle
+                    ) const;
+
+// helper
+    /** appends the descriptions of all properties which were registered 'til that moment to the given sequence,
+        keeping the array sorted (by name)
+        @precond
+            the given sequence is already sorted by name
+        @param  _rProps
+            initial property sequence which is to be extended
+    */
+    void    describeProperties(css::uno::Sequence< css::beans::Property >& /* [out] */ _rProps) const;
+
+    /** retrieves the description for a registered property
+        @throw  css::beans::UnknownPropertyException
+            if no property with the given name is registered
+    */
+    const css::beans::Property&
+            getProperty( const OUString& _rName ) const;
+
+private:
+    /// insertion of _rProp into m_aProperties, keeping the sort order
+    COMPHELPER_DLLPRIVATE void  implPushBackProperty(const PropertyDescription& _rProp);
+
+    /// search the PropertyDescription for the given handle (within m_aProperties)
+    COMPHELPER_DLLPRIVATE PropertiesIterator    searchHandle(sal_Int32 _nHandle);
+
+private:
+    OPropertyContainerHelper( const OPropertyContainerHelper& ) = delete;
+    OPropertyContainerHelper& operator=( const OPropertyContainerHelper& ) = delete;
+};
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPERTYCONTAINERHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertysequence.hxx b/include/comphelper/propertysequence.hxx
new file mode 100644
index 000000000..e788f56f4
--- /dev/null
+++ b/include/comphelper/propertysequence.hxx
@@ -0,0 +1,62 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_PROPERTYSEQUENCE_HXX
+#define INCLUDED_COMPHELPER_PROPERTYSEQUENCE_HXX
+
+#include <utility>
+#include <algorithm>
+#include <initializer_list>
+#include <vector>
+
+#include <com/sun/star/uno/Any.hxx>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/beans/PropertyValue.hpp>
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper
+{
+    /// Init list for property sequences.
+    inline css::uno::Sequence< css::beans::PropertyValue > InitPropertySequence(
+        ::std::initializer_list< ::std::pair< OUString, css::uno::Any > > vInit)
+    {
+        css::uno::Sequence< css::beans::PropertyValue> vResult{static_cast<sal_Int32>(vInit.size())};
+        std::transform(vInit.begin(), vInit.end(), vResult.getArray(),
+                       [](const std::pair<OUString, css::uno::Any>& rInit) {
+                           return css::beans::PropertyValue(rInit.first, -1, rInit.second,
+                                                            css::beans::PropertyState_DIRECT_VALUE);
+                       });
+        return vResult;
+    }
+
+    /// Init list for property sequences that wrap the PropertyValues in Anys.
+    ///
+    /// This is particularly useful for creation of sequences that are later
+    /// unwrapped using comphelper::SequenceAsHashMap.
+    inline css::uno::Sequence< css::uno::Any > InitAnyPropertySequence(
+        ::std::initializer_list< ::std::pair< OUString, css::uno::Any > > vInit)
+    {
+        css::uno::Sequence<css::uno::Any> vResult{static_cast<sal_Int32>(vInit.size())};
+        std::transform(vInit.begin(), vInit.end(), vResult.getArray(),
+                       [](const std::pair<OUString, css::uno::Any>& rInit) {
+                           return css::uno::Any(
+                               css::beans::PropertyValue(rInit.first, -1, rInit.second,
+                                                         css::beans::PropertyState_DIRECT_VALUE));
+                       });
+        return vResult;
+    }
+
+    COMPHELPER_DLLPUBLIC std::vector<css::beans::PropertyValue> JsonToPropertyValues(const OString& rJson);
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPERTYSEQUENCE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertysethelper.hxx b/include/comphelper/propertysethelper.hxx
new file mode 100644
index 000000000..a4746a02f
--- /dev/null
+++ b/include/comphelper/propertysethelper.hxx
@@ -0,0 +1,96 @@
+/* -*- 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_COMPHELPER_PROPERTYSETHELPER_HXX
+#define INCLUDED_COMPHELPER_PROPERTYSETHELPER_HXX
+
+#include <com/sun/star/beans/XPropertySet.hpp>
+#include <com/sun/star/beans/XPropertyState.hpp>
+#include <com/sun/star/beans/XMultiPropertySet.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ref.hxx>
+
+namespace comphelper
+{
+class PropertySetInfo;
+struct PropertyMapEntry;
+
+class COMPHELPER_DLLPUBLIC PropertySetHelper : public css::beans::XPropertySet,
+                          public css::beans::XPropertyState,
+                          public css::beans::XMultiPropertySet
+{
+private:
+    rtl::Reference<PropertySetInfo> mxInfo;
+
+protected:
+    /// @throws css::beans::UnknownPropertyException
+    /// @throws css::beans::PropertyVetoException
+    /// @throws css::lang::IllegalArgumentException
+    /// @throws css::lang::WrappedTargetException
+    /// @throws css::uno::RuntimeException
+    virtual void _setPropertyValues( const comphelper::PropertyMapEntry** ppEntries, const css::uno::Any* pValues ) = 0;
+    /// @throws css::beans::UnknownPropertyException
+    /// @throws css::lang::WrappedTargetException
+    /// @throws css::uno::RuntimeException
+    virtual void _getPropertyValues( const comphelper::PropertyMapEntry** ppEntries, css::uno::Any* pValue ) = 0;
+
+    /// @throws css::beans::UnknownPropertyException
+    /// @throws css::uno::RuntimeException
+    virtual void _getPropertyStates( const comphelper::PropertyMapEntry** ppEntries, css::beans::PropertyState* pStates );
+    /// @throws css::beans::UnknownPropertyException
+    /// @throws css::uno::RuntimeException
+    virtual void _setPropertyToDefault( const comphelper::PropertyMapEntry* pEntry );
+    /// @throws css::beans::UnknownPropertyException
+    /// @throws css::lang::WrappedTargetException
+    /// @throws css::uno::RuntimeException
+    virtual css::uno::Any _getPropertyDefault( const comphelper::PropertyMapEntry* pEntry );
+
+public:
+    PropertySetHelper( rtl::Reference<comphelper::PropertySetInfo> xInfo ) noexcept;
+    virtual ~PropertySetHelper() noexcept;
+
+    // XPropertySet
+    virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL getPropertySetInfo(  ) override;
+    virtual void SAL_CALL setPropertyValue( const OUString& aPropertyName, const css::uno::Any& aValue ) override;
+    virtual css::uno::Any SAL_CALL getPropertyValue( const OUString& PropertyName ) override;
+    virtual void SAL_CALL addPropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& xListener ) override;
+    virtual void SAL_CALL removePropertyChangeListener( const OUString& aPropertyName, const css::uno::Reference< css::beans::XPropertyChangeListener >& aListener ) override;
+    virtual void SAL_CALL addVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+    virtual void SAL_CALL removeVetoableChangeListener( const OUString& PropertyName, const css::uno::Reference< css::beans::XVetoableChangeListener >& aListener ) override;
+
+    // XMultiPropertySet
+//  virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL getPropertySetInfo(  ) throw(css::uno::RuntimeException);
+    virtual void SAL_CALL setPropertyValues( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Sequence< css::uno::Any >& aValues ) override;
+    virtual css::uno::Sequence< css::uno::Any > SAL_CALL getPropertyValues( const css::uno::Sequence< OUString >& aPropertyNames ) override;
+    virtual void SAL_CALL addPropertiesChangeListener( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+    virtual void SAL_CALL removePropertiesChangeListener( const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+    virtual void SAL_CALL firePropertiesChangeEvent( const css::uno::Sequence< OUString >& aPropertyNames, const css::uno::Reference< css::beans::XPropertiesChangeListener >& xListener ) override;
+
+    // XPropertyState
+    virtual css::beans::PropertyState SAL_CALL getPropertyState( const OUString& PropertyName ) override;
+    virtual css::uno::Sequence< css::beans::PropertyState > SAL_CALL getPropertyStates( const css::uno::Sequence< OUString >& aPropertyName ) override;
+    virtual void SAL_CALL setPropertyToDefault( const OUString& PropertyName ) override;
+    virtual css::uno::Any SAL_CALL getPropertyDefault( const OUString& aPropertyName ) override;
+};
+
+}
+
+#endif // _UTL_PROPERTYSETHELPER_HXX_
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertysetinfo.hxx b/include/comphelper/propertysetinfo.hxx
new file mode 100644
index 000000000..ee26d8698
--- /dev/null
+++ b/include/comphelper/propertysetinfo.hxx
@@ -0,0 +1,123 @@
+/* -*- 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_COMPHELPER_PROPERTYSETINFO_HXX
+#define INCLUDED_COMPHELPER_PROPERTYSETINFO_HXX
+
+#include <sal/config.h>
+
+#include <com/sun/star/beans/XPropertySetInfo.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <o3tl/span.hxx>
+#include <o3tl/typed_flags_set.hxx>
+#include <unordered_map>
+#include <utility>
+
+enum class PropertyMoreFlags : sal_uInt8 {
+    NONE            = 0x00,
+    METRIC_ITEM     = 0x01,
+};
+namespace o3tl {
+    template<> struct typed_flags<PropertyMoreFlags> : is_typed_flags<PropertyMoreFlags, 0x1> {};
+}
+
+namespace comphelper
+{
+
+struct PropertyMapEntry
+{
+    OUString       maName;
+    css::uno::Type maType;
+    sal_Int32      mnHandle;
+    /// flag bitmap, @see css::beans::PropertyAttribute
+    sal_Int16      mnAttributes;
+    sal_uInt8      mnMemberId;
+    PropertyMoreFlags mnMoreFlags;
+
+    PropertyMapEntry(OUString _aName, sal_Int32 _nHandle, css::uno::Type const & _rType,
+                     sal_Int16 _nAttributes, sal_uInt8 _nMemberId, PropertyMoreFlags _nMoreFlags = PropertyMoreFlags::NONE)
+        : maName(std::move( _aName ))
+        , maType( _rType )
+        , mnHandle( _nHandle )
+        , mnAttributes( _nAttributes )
+        , mnMemberId( _nMemberId )
+        , mnMoreFlags( _nMoreFlags )
+    {
+        assert(mnAttributes <= 0x1ff );
+        assert( (_nMemberId & 0x40) == 0 );
+        // Verify that if METRIC_ITEM is set, we are one of the types supported by
+        // SvxUnoConvertToMM.
+        assert(!(_nMoreFlags & PropertyMoreFlags::METRIC_ITEM) ||
+            ( (maType.getTypeClass() == css::uno::TypeClass_BYTE)
+              || (maType.getTypeClass() == css::uno::TypeClass_SHORT)
+              || (maType.getTypeClass() == css::uno::TypeClass_UNSIGNED_SHORT)
+              || (maType.getTypeClass() == css::uno::TypeClass_LONG)
+              || (maType.getTypeClass() == css::uno::TypeClass_UNSIGNED_LONG)
+            ) );
+    }
+    PropertyMapEntry() = default;
+};
+
+typedef std::unordered_map<OUString, PropertyMapEntry const *> PropertyMap;
+
+// don't export to avoid duplicate WeakImplHelper definitions with MSVC
+class SAL_DLLPUBLIC_TEMPLATE PropertySetInfo_BASE
+    : public ::cppu::WeakImplHelper< css::beans::XPropertySetInfo >
+{};
+
+/** this class implements a XPropertySetInfo that is initialized with arrays of PropertyMapEntry.
+    It is used by the class PropertySetHelper.
+*/
+class COMPHELPER_DLLPUBLIC PropertySetInfo final
+    : public PropertySetInfo_BASE
+{
+public:
+    PropertySetInfo() noexcept;
+    PropertySetInfo( o3tl::span<const PropertyMapEntry> pMap ) noexcept;
+    virtual ~PropertySetInfo() noexcept override;
+
+    /** returns a stl map with all PropertyMapEntry pointer.<p>
+        The key is the property name.
+    */
+    const PropertyMap& getPropertyMap() const noexcept { return maPropertyMap; }
+
+    /** adds an array of PropertyMapEntry to this instance.<p>
+        The end is marked with a PropertyMapEntry where mpName equals NULL</p>
+    */
+    void add( o3tl::span<PropertyMapEntry const> pMap ) noexcept;
+
+    /** removes an already added PropertyMapEntry which string in mpName equals to aName */
+    void remove( const OUString& aName ) noexcept;
+
+    virtual css::uno::Sequence< css::beans::Property > SAL_CALL getProperties() override;
+    virtual css::beans::Property SAL_CALL getPropertyByName( const OUString& aName ) override;
+    virtual sal_Bool SAL_CALL hasPropertyByName( const OUString& Name ) override;
+
+private:
+    PropertyMap maPropertyMap;
+    /// Cache the value we return in getProperties because it is expensive to construct
+    css::uno::Sequence< css::beans::Property > maProperties;
+};
+
+}
+
+#endif // _UTL_PROPERTSETINFO_HXX_
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertystatecontainer.hxx b/include/comphelper/propertystatecontainer.hxx
new file mode 100644
index 000000000..966e2cb99
--- /dev/null
+++ b/include/comphelper/propertystatecontainer.hxx
@@ -0,0 +1,110 @@
+/* -*- 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_COMPHELPER_PROPERTYSTATECONTAINER_HXX
+#define INCLUDED_COMPHELPER_PROPERTYSTATECONTAINER_HXX
+
+#include <comphelper/propertycontainer.hxx>
+#include <com/sun/star/beans/XPropertyState.hpp>
+#include <cppuhelper/implbase1.hxx>
+#include <comphelper/uno3.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+
+namespace comphelper
+{
+
+
+    //= OPropertyStateContainer
+
+    typedef ::cppu::ImplHelper1 <   css::beans::XPropertyState
+                                >   OPropertyStateContainer_TBase;
+
+    /** helper implementation for components which have properties with a default
+
+        <p>This class is not intended for direct use, you need to derive from it.</p>
+
+        @see com.sun.star.beans.XPropertyState
+    */
+    class COMPHELPER_DLLPUBLIC OPropertyStateContainer
+                :public  OPropertyContainer
+                ,public  OPropertyStateContainer_TBase
+    {
+    protected:
+        /** ctor
+            @param _rBHelper
+                help to be used for broadcasting events
+        */
+        OPropertyStateContainer( ::cppu::OBroadcastHelper&  _rBHelper );
+
+
+        // XPropertyState
+        virtual css::beans::PropertyState SAL_CALL getPropertyState( const OUString& PropertyName ) override;
+        virtual css::uno::Sequence< css::beans::PropertyState > SAL_CALL getPropertyStates( const css::uno::Sequence< OUString >& aPropertyName ) override;
+        virtual void SAL_CALL setPropertyToDefault( const OUString& PropertyName ) override;
+        virtual css::uno::Any SAL_CALL getPropertyDefault( const OUString& aPropertyName ) override;
+
+
+        // own overridables
+        // these are the impl-methods for the XPropertyState members - they are implemented already by this class,
+        // but you may want to override them for whatever reasons (for instance, if your derived class
+        // supports the AMBIGUOUS state for properties)
+
+        /** get the PropertyState of the property denoted by the given handle
+
+            <p>Already implemented by this base class, no need to override</p>
+            @precond <arg>_nHandle</arg> is a valid property handle
+        */
+        css::beans::PropertyState  getPropertyStateByHandle( sal_Int32 _nHandle ) const;
+
+        /** set the property denoted by the given handle to its default value
+
+            <p>Already implemented by this base class, no need to override</p>
+            @precond <arg>_nHandle</arg> is a valid property handle
+        */
+        void                       setPropertyToDefaultByHandle( sal_Int32 _nHandle );
+
+        /** get the default value for the property denoted by the given handle
+
+            @precond
+                <arg>_nHandle</arg> is a valid property handle
+        */
+        virtual void getPropertyDefaultByHandle( sal_Int32 _nHandle, css::uno::Any& _rDefault ) const = 0;
+
+    protected:
+        // XInterface
+        virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type& _rType ) override;
+        // XTypeProvider
+        DECLARE_XTYPEPROVIDER( )
+
+    protected:
+        /** returns the handle for the given name
+
+            @throw UnknownPropertyException if the given name is not a registered property
+        */
+        sal_Int32   getHandleForName( const OUString& _rPropertyName );
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPERTYSTATECONTAINER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propertyvalue.hxx b/include/comphelper/propertyvalue.hxx
new file mode 100644
index 000000000..de7179110
--- /dev/null
+++ b/include/comphelper/propertyvalue.hxx
@@ -0,0 +1,45 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_PROPERTYVALUE_HXX
+#define INCLUDED_COMPHELPER_PROPERTYVALUE_HXX
+
+#include <sal/config.h>
+
+#include <type_traits>
+#include <utility>
+
+#include <com/sun/star/beans/PropertyValue.hpp>
+
+namespace comphelper
+{
+/**
+ * Creates a beans::PropertyValue easily, i.e. you can write:
+ *
+ * function(comphelper::makePropertyValue("Foo", nBar));
+ *
+ * instead of writing 3 extra lines to set the name and value of the beans::PropertyValue.
+ */
+template <typename T, std::enable_if_t<!std::is_arithmetic_v<std::remove_reference_t<T>>, int> = 0>
+css::beans::PropertyValue makePropertyValue(const OUString& rName, T&& rValue)
+{
+    return { rName, 0, css::uno::toAny(std::forward<T>(rValue)),
+             css::beans::PropertyState_DIRECT_VALUE };
+}
+// Allows to pass e.g. bit fields
+template <typename T, std::enable_if_t<std::is_arithmetic_v<T>, int> = 0>
+css::beans::PropertyValue makePropertyValue(const OUString& rName, T aValue)
+{
+    return makePropertyValue(rName, css::uno::toAny(aValue));
+}
+}
+
+#endif // INCLUDED_COMPHELPER_PROPERTYVALUE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propmultiplex.hxx b/include/comphelper/propmultiplex.hxx
new file mode 100644
index 000000000..41d456d43
--- /dev/null
+++ b/include/comphelper/propmultiplex.hxx
@@ -0,0 +1,115 @@
+/* -*- 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_COMPHELPER_PROPMULTIPLEX_HXX
+#define INCLUDED_COMPHELPER_PROPMULTIPLEX_HXX
+
+#include <com/sun/star/beans/XPropertyChangeListener.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ref.hxx>
+#include <vector>
+
+namespace com::sun::star::beans { class XPropertySet; }
+
+//= property helper classes
+
+
+namespace comphelper
+{
+
+
+    class OPropertyChangeMultiplexer;
+
+
+    //= OPropertyChangeListener
+
+    /// simple listener adapter for property sets
+    class COMPHELPER_DLLPUBLIC OPropertyChangeListener
+    {
+        friend class OPropertyChangeMultiplexer;
+
+        rtl::Reference<OPropertyChangeMultiplexer> m_xAdapter;
+        ::osl::Mutex&               m_rMutex;
+
+    public:
+        OPropertyChangeListener(::osl::Mutex& _rMutex)
+            : m_rMutex(_rMutex) { }
+        virtual ~OPropertyChangeListener();
+
+        /// @throws css::uno::RuntimeException
+        virtual void _propertyChanged(const css::beans::PropertyChangeEvent& _rEvent) = 0;
+        /// @throws css::uno::RuntimeException
+        virtual void _disposing(const css::lang::EventObject& _rSource);
+
+    protected:
+        /** If the derivee also owns the mutex which we know as reference, then call this within your
+            derivee's dtor.
+        */
+        void    disposeAdapter();
+
+        // pseudo-private. Making it private now could break compatibility
+        void    setAdapter( OPropertyChangeMultiplexer* _pAdapter );
+    };
+
+
+    //= OPropertyChangeMultiplexer
+
+    /// multiplexer for property changes
+    // workaround for incremental linking bugs in MSVC2019
+    class SAL_DLLPUBLIC_TEMPLATE OPropertyChangeMultiplexer_Base : public cppu::WeakImplHelper< css::beans::XPropertyChangeListener > {};
+    class COMPHELPER_DLLPUBLIC OPropertyChangeMultiplexer final : public OPropertyChangeMultiplexer_Base
+    {
+        friend class OPropertyChangeListener;
+        std::vector< OUString >                         m_aProperties;
+        css::uno::Reference< css::beans::XPropertySet>  m_xSet;
+        OPropertyChangeListener*                        m_pListener;
+        sal_Int32                                       m_nLockCount;
+        bool                                            m_bListening        : 1;
+        bool const                                      m_bAutoSetRelease   : 1;
+
+
+        virtual ~OPropertyChangeMultiplexer() override;
+    public:
+        OPropertyChangeMultiplexer(OPropertyChangeListener* _pListener, const  css::uno::Reference< css::beans::XPropertySet>& _rxSet, bool _bAutoReleaseSet = true);
+
+    // XEventListener
+        virtual void SAL_CALL disposing( const  css::lang::EventObject& Source ) override;
+
+    // XPropertyChangeListener
+        virtual void SAL_CALL propertyChange( const  css::beans::PropertyChangeEvent& evt ) override;
+
+        /// incremental lock
+        void        lock();
+        /// incremental unlock
+        void        unlock();
+        /// get the lock count
+        sal_Int32   locked() const { return m_nLockCount; }
+
+        void addProperty(const OUString& aPropertyName);
+        void dispose();
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPMULTIPLEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/propstate.hxx b/include/comphelper/propstate.hxx
new file mode 100644
index 000000000..7729aaa9b
--- /dev/null
+++ b/include/comphelper/propstate.hxx
@@ -0,0 +1,102 @@
+/* -*- 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_COMPHELPER_PROPSTATE_HXX
+#define INCLUDED_COMPHELPER_PROPSTATE_HXX
+
+#include <config_options.h>
+#include <com/sun/star/beans/XPropertyState.hpp>
+#include <com/sun/star/uno/Sequence.h>
+
+
+#include <cppuhelper/propshlp.hxx>
+#include <cppuhelper/weak.hxx>
+#include <comphelper/uno3.hxx>
+#include <comphelper/broadcasthelper.hxx>
+#include <com/sun/star/lang/XTypeProvider.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+
+//= property helper classes
+
+
+namespace comphelper
+{
+
+
+    //= OPropertyStateHelper
+
+    /// helper class for implementing property states
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OPropertyStateHelper :public ::cppu::OPropertySetHelper2
+                                                    ,public css::beans::XPropertyState
+    {
+    public:
+        OPropertyStateHelper(::cppu::OBroadcastHelper& rBHlp):OPropertySetHelper2(rBHlp) { }
+        OPropertyStateHelper(::cppu::OBroadcastHelper& rBHlp,
+                             ::cppu::IEventNotificationHook *i_pFireEvents);
+
+        virtual css::uno::Any SAL_CALL queryInterface(const css::uno::Type& aType) override;
+
+    // XPropertyState
+        virtual css::beans::PropertyState SAL_CALL
+            getPropertyState(const OUString& PropertyName) override;
+        virtual css::uno::Sequence< css::beans::PropertyState> SAL_CALL
+            getPropertyStates(const css::uno::Sequence< OUString >& aPropertyName) override;
+        virtual void SAL_CALL
+            setPropertyToDefault(const OUString& PropertyName) override;
+        virtual css::uno::Any SAL_CALL
+            getPropertyDefault(const OUString& aPropertyName) override;
+
+    // access via handle
+        virtual css::beans::PropertyState  getPropertyStateByHandle(sal_Int32 nHandle);
+        virtual void                                    setPropertyToDefaultByHandle(sal_Int32 nHandle);
+        virtual css::uno::Any              getPropertyDefaultByHandle(sal_Int32 nHandle) const;
+
+    protected:
+        virtual ~OPropertyStateHelper() override;
+
+        void firePropertyChange(sal_Int32 nHandle, const css::uno::Any& aNewValue, const css::uno::Any& aOldValue);
+
+        static css::uno::Sequence<css::uno::Type> getTypes();
+    };
+
+
+    //= OPropertyStateHelper
+
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OStatefulPropertySet  :public ::cppu::OWeakObject
+                                ,public css::lang::XTypeProvider
+                                ,public OMutexAndBroadcastHelper    // order matters: before OPropertyStateHelper/OPropertySetHelper
+                                ,public OPropertyStateHelper
+    {
+    protected:
+        OStatefulPropertySet();
+        virtual ~OStatefulPropertySet() override;
+
+    protected:
+        DECLARE_XINTERFACE()
+        DECLARE_XTYPEPROVIDER()
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROPSTATE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/proxyaggregation.hxx b/include/comphelper/proxyaggregation.hxx
new file mode 100644
index 000000000..48444355c
--- /dev/null
+++ b/include/comphelper/proxyaggregation.hxx
@@ -0,0 +1,218 @@
+/* -*- 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_COMPHELPER_PROXYAGGREGATION_HXX
+#define INCLUDED_COMPHELPER_PROXYAGGREGATION_HXX
+
+#include <cppuhelper/implbase1.hxx>
+#include <cppuhelper/interfacecontainer.h>
+#include <cppuhelper/basemutex.hxx>
+#include <comphelper/uno3.hxx>
+#include <cppuhelper/compbase_ex.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::uno {
+    class XComponentContext;
+}
+namespace com::sun::star::uno { class XAggregation; }
+namespace com::sun::star::lang { class XComponent; }
+
+/* class hierarchy herein:
+
+         +-------------------+          helper class for aggregating the proxy to another object
+         | OProxyAggregation |          - not ref counted
+         +-------------------+          - no UNO implementation, i.e. not derived from XInterface
+                   ^                      (neither direct nor indirect)
+                   |
+                   |
+  +----------------------------------+  helper class for aggregating a proxy to an XComponent
+  | OComponentProxyAggregationHelper |  - life time coupling: if the inner component (the "aggregate")
+  +----------------------------------+    is disposed, the outer (the delegator) is disposed, too, and
+                   ^                      vice versa
+                   |                    - UNO based, implementing XEventListener
+                   |
+     +----------------------------+     component aggregating another XComponent
+     | OComponentProxyAggregation |     - life time coupling as above
+     +----------------------------+     - ref-counted
+                                        - implements an XComponent itself
+
+  If you need to
+
+  - wrap a foreign object which is a XComponent
+    => use OComponentProxyAggregation
+       - call componentAggregateProxyFor in your ctor
+       - call implEnsureDisposeInDtor in your dtor
+
+  - wrap a foreign object which is a XComponent, but already have ref-counting mechanisms
+    inherited from somewhere else
+    => use OComponentProxyAggregationHelper
+       - override dispose - don't forget to call the base class' dispose!
+       - call componentAggregateProxyFor in your ctor
+
+  - wrap a foreign object which is no XComponent
+    => use OProxyAggregation
+       - call baseAggregateProxyFor in your ctor
+*/
+
+
+namespace comphelper
+{
+
+
+    //= OProxyAggregation
+
+    /** helper class for aggregating a proxy for a foreign object
+    */
+    class OProxyAggregation
+    {
+    private:
+        css::uno::Reference< css::uno::XAggregation >             m_xProxyAggregate;
+        css::uno::Reference< css::lang::XTypeProvider >           m_xProxyTypeAccess;
+        css::uno::Reference< css::uno::XComponentContext >        m_xContext;
+
+    protected:
+        const css::uno::Reference< css::uno::XComponentContext >& getComponentContext() const
+        {
+            return m_xContext;
+        }
+
+    protected:
+        OProxyAggregation( const css::uno::Reference< css::uno::XComponentContext >& _rxContext );
+        ~OProxyAggregation();
+
+        /// to be called from within your ctor
+        void baseAggregateProxyFor(
+            const css::uno::Reference< css::uno::XInterface >& _rxComponent,
+            oslInterlockedCount& _rRefCount,
+            ::cppu::OWeakObject& _rDelegator
+        );
+
+        // XInterface and XTypeProvider
+        /// @throws css::uno::RuntimeException
+        css::uno::Any SAL_CALL queryAggregation( const css::uno::Type& _rType );
+        /// @throws css::uno::RuntimeException
+        css::uno::Sequence< css::uno::Type > SAL_CALL getTypes(  );
+
+    private:
+        OProxyAggregation( const OProxyAggregation& ) = delete;
+        OProxyAggregation& operator=( const OProxyAggregation& ) = delete;
+    };
+
+
+    //= OComponentProxyAggregationHelper
+
+    /** a helper class for aggregating a proxy to an XComponent
+
+        <p>The object couples the life time of itself and the component: if one of the both
+        dies (in a sense of being disposed), the other one dies, too.</p>
+
+        <p>The class itself does not implement XComponent so you need to forward any XComponent::dispose
+        calls which your derived class gets to the dispose method of this class.</p>
+    */
+
+    class OComponentProxyAggregationHelper :public ::cppu::ImplHelper1 <   css::lang::XEventListener
+                                                                        >
+                                            ,private OProxyAggregation
+    {
+    private:
+        typedef ::cppu::ImplHelper1 <   css::lang::XEventListener
+                                    >   BASE;   // prevents some MSVC problems
+
+    protected:
+        css::uno::Reference< css::lang::XComponent >
+                                            m_xInner;
+        ::cppu::OBroadcastHelper&           m_rBHelper;
+
+    protected:
+        // OProxyAggregation
+        using OProxyAggregation::getComponentContext;
+
+        // XInterface
+        css::uno::Any SAL_CALL queryInterface( const css::uno::Type& _rType ) override;
+
+        // XTypeProvider
+        DECLARE_XTYPEPROVIDER( )
+
+    protected:
+        OComponentProxyAggregationHelper(
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+            ::cppu::OBroadcastHelper& _rBHelper
+        );
+        virtual ~OComponentProxyAggregationHelper( );
+
+        /// to be called from within your ctor
+        void componentAggregateProxyFor(
+            const css::uno::Reference< css::lang::XComponent >& _rxComponent,
+            oslInterlockedCount& _rRefCount,
+            ::cppu::OWeakObject& _rDelegator
+        );
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+        // XComponent
+        /// @throws css::uno::RuntimeException
+        virtual void SAL_CALL dispose() = 0;
+
+    private:
+        OComponentProxyAggregationHelper( const OComponentProxyAggregationHelper& ) = delete;
+        OComponentProxyAggregationHelper& operator=( const OComponentProxyAggregationHelper& ) = delete;
+    };
+
+
+    //= OComponentProxyAggregation
+
+    class COMPHELPER_DLLPUBLIC OComponentProxyAggregation : public cppu::BaseMutex
+                                        ,public cppu::WeakComponentImplHelperBase
+                                        ,public OComponentProxyAggregationHelper
+    {
+    protected:
+        OComponentProxyAggregation(
+            const css::uno::Reference< css::uno::XComponentContext >& _rxContext,
+            const css::uno::Reference< css::lang::XComponent >& _rxComponent
+        );
+
+        virtual ~OComponentProxyAggregation() override;
+
+        // XInterface
+        DECLARE_XINTERFACE()
+        // XTypeProvider
+        DECLARE_XTYPEPROVIDER()
+
+        // OComponentHelper
+        virtual void SAL_CALL disposing() override;
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& _rSource ) override;
+
+        // XComponent/OComponentProxyAggregationHelper
+        virtual void SAL_CALL dispose() override;
+
+    private:
+        OComponentProxyAggregation( const OComponentProxyAggregation& ) = delete;
+        OComponentProxyAggregation& operator=( const OComponentProxyAggregation& ) = delete;
+    };
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_PROXYAGGREGATION_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/random.hxx b/include/comphelper/random.hxx
new file mode 100644
index 000000000..345d57c71
--- /dev/null
+++ b/include/comphelper/random.hxx
@@ -0,0 +1,39 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_RANDOM_HXX
+#define INCLUDED_COMPHELPER_RANDOM_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper::rng
+{
+// These functions obey the SAL_RAND_REPEATABLE environment
+// variable: If it is set, use a fixed seed.
+
+// note that uniform_int_distribution is inclusive of b, i.e. [a,b] while
+// uniform_real_distribution is exclusive of b, i.e. [a,b), std::nextafter may be your friend there
+
+/// uniform distribution in [a,b)
+COMPHELPER_DLLPUBLIC double uniform_real_distribution(double a = 0.0, double b = 1.0);
+
+/// uniform distribution in [a,b]
+COMPHELPER_DLLPUBLIC int uniform_int_distribution(int a, int b);
+
+/// uniform distribution in [a,b]
+COMPHELPER_DLLPUBLIC unsigned int uniform_uint_distribution(unsigned int a, unsigned int b);
+
+/// uniform distribution in [a,b]
+COMPHELPER_DLLPUBLIC size_t uniform_size_distribution(size_t a, size_t b);
+
+} // namespace
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/refcountedmutex.hxx b/include/comphelper/refcountedmutex.hxx
new file mode 100644
index 000000000..fcda72097
--- /dev/null
+++ b/include/comphelper/refcountedmutex.hxx
@@ -0,0 +1,43 @@
+/* -*- 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_COMPHELPER_REFCOUNTEDMUTEX_HXX
+#define INCLUDED_COMPHELPER_REFCOUNTEDMUTEX_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <osl/mutex.hxx>
+#include <salhelper/simplereferenceobject.hxx>
+
+namespace comphelper
+{
+class COMPHELPER_DLLPUBLIC RefCountedMutex final : public salhelper::SimpleReferenceObject
+{
+    osl::Mutex m_aMutex;
+
+public:
+    ~RefCountedMutex() override;
+
+    ::osl::Mutex& GetMutex() { return m_aMutex; }
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_REFCOUNTEDMUTEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/scopeguard.hxx b/include/comphelper/scopeguard.hxx
new file mode 100644
index 000000000..95832c505
--- /dev/null
+++ b/include/comphelper/scopeguard.hxx
@@ -0,0 +1,92 @@
+/* -*- 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_COMPHELPER_SCOPEGUARD_HXX
+#define INCLUDED_COMPHELPER_SCOPEGUARD_HXX
+
+#include <sal/config.h>
+
+#include <utility>
+
+#include <o3tl/deleter.hxx>
+
+// For some reason, Android buildbot issues -Werror like this:
+//   In file included from
+//   /home/android/lo/master-android-arm/filter/source/xmlfilteradaptor/XmlFilterAdaptor.cxx:50:
+//   /home/android/lo/master-android-arm/include/comphelper/scopeguard.hxx:36:14:
+//   error: function 'comphelper::<deduction guide for ScopeGuard><(lambda at
+//   /home/android/lo/master-android-arm/filter/source/xmlfilteradaptor/XmlFilterAdaptor.cxx:146:34)>'
+//   has internal linkage but is not defined [-Werror,-Wundefined-internal]
+//       explicit ScopeGuard( Func && func ) : m_func( std::move(func) ) {}
+//                ^
+//   /home/android/lo/master-android-arm/filter/source/xmlfilteradaptor/XmlFilterAdaptor.cxx:146:28:
+//   note: used here
+//       comphelper::ScopeGuard guard([&]() {
+//                              ^
+#ifdef ANDROID
+#if defined __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wundefined-internal"
+#endif
+#endif
+
+
+namespace comphelper {
+
+/** ScopeGuard to ease writing exception-safe code.
+ */
+template <class Func> class ScopeGuard
+{
+public:
+    /** @param func function object to be executed in dtor
+    */
+    explicit ScopeGuard( Func && func ) : m_func( std::move(func) ) {}
+
+    ~ScopeGuard()
+    {
+        if (m_bDismissed)
+            return;
+        suppress_fun_call_w_exception(m_func());
+    }
+
+    /** Dismisses the scope guard, i.e. the function won't
+        be executed.
+    */
+    void dismiss() { m_bDismissed = true; }
+
+private:
+    // noncopyable until we have good reasons...
+    ScopeGuard(const ScopeGuard&) = delete;
+    ScopeGuard& operator=(const ScopeGuard&) = delete;
+
+    Func m_func;
+    bool m_bDismissed = false;
+};
+
+} // namespace comphelper
+
+#ifdef ANDROID
+#if defined __clang__
+#pragma clang diagnostic pop
+#endif
+#endif
+
+#endif // ! defined(INCLUDED_COMPHELPER_SCOPEGUARD_HXX)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/seekableinput.hxx b/include/comphelper/seekableinput.hxx
new file mode 100644
index 000000000..0c2092f7b
--- /dev/null
+++ b/include/comphelper/seekableinput.hxx
@@ -0,0 +1,83 @@
+/* -*- 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_COMPHELPER_SEEKABLEINPUT_HXX
+#define INCLUDED_COMPHELPER_SEEKABLEINPUT_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <mutex>
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+namespace comphelper
+{
+
+class SAL_DLLPUBLIC_TEMPLATE OSeekableInputWrapper_BASE
+    : public ::cppu::WeakImplHelper< css::io::XInputStream,
+                                     css::io::XSeekable >
+{};
+
+class COMPHELPER_DLLPUBLIC OSeekableInputWrapper final
+    : public OSeekableInputWrapper_BASE
+{
+    std::mutex    m_aMutex;
+
+    css::uno::Reference< css::uno::XComponentContext > m_xContext;
+
+    css::uno::Reference< css::io::XInputStream > m_xOriginalStream;
+
+    css::uno::Reference< css::io::XInputStream > m_xCopyInput;
+    css::uno::Reference< css::io::XSeekable > m_xCopySeek;
+
+private:
+    COMPHELPER_DLLPRIVATE void PrepareCopy_Impl();
+
+public:
+    OSeekableInputWrapper(
+                css::uno::Reference< css::io::XInputStream > xInStream,
+                css::uno::Reference< css::uno::XComponentContext > xContext );
+
+    virtual ~OSeekableInputWrapper() override;
+
+    static css::uno::Reference< css::io::XInputStream > CheckSeekableCanWrap(
+                        const css::uno::Reference< css::io::XInputStream >& xInStream,
+                        const css::uno::Reference< css::uno::XComponentContext >& rxContext );
+
+// XInputStream
+    virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nBytesToRead ) override;
+    virtual sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence< sal_Int8 >& aData, sal_Int32 nMaxBytesToRead ) override;
+    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override;
+    virtual sal_Int32 SAL_CALL available() override;
+    virtual void SAL_CALL closeInput() override;
+
+// XSeekable
+    virtual void SAL_CALL seek( sal_Int64 location ) override;
+    virtual sal_Int64 SAL_CALL getPosition() override;
+    virtual sal_Int64 SAL_CALL getLength() override;
+
+};
+
+}   // namespace comphelper
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/seqstream.hxx b/include/comphelper/seqstream.hxx
new file mode 100644
index 000000000..c2ba39134
--- /dev/null
+++ b/include/comphelper/seqstream.hxx
@@ -0,0 +1,135 @@
+/* -*- 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_COMPHELPER_SEQSTREAM_HXX
+#define INCLUDED_COMPHELPER_SEQSTREAM_HXX
+
+#include <config_options.h>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/io/XInputStream.hpp>
+#include <com/sun/star/io/XOutputStream.hpp>
+#include <com/sun/star/io/XSeekable.hpp>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <cppuhelper/implbase.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <comphelper/bytereader.hxx>
+#include <mutex>
+
+namespace comphelper
+{
+
+
+// SequenceInputStream
+// stream for reading data from a sequence of bytes
+
+
+class COMPHELPER_DLLPUBLIC SequenceInputStream final
+    : public ::cppu::WeakImplHelper< css::io::XInputStream, css::io::XSeekable, css::lang::XUnoTunnel >,
+      public comphelper::ByteReader
+{
+    std::mutex    m_aMutex;
+    css::uno::Sequence<sal_Int8> const m_aData;
+    sal_Int32       m_nPos;
+
+public:
+    SequenceInputStream(css::uno::Sequence<sal_Int8> const & rData);
+
+// css::io::XInputStream
+    virtual sal_Int32 SAL_CALL readBytes( css::uno::Sequence<sal_Int8>& aData, sal_Int32 nBytesToRead ) override;
+
+    virtual sal_Int32 SAL_CALL readSomeBytes( css::uno::Sequence<sal_Int8>& aData, sal_Int32 nMaxBytesToRead ) override;
+
+    virtual void SAL_CALL skipBytes( sal_Int32 nBytesToSkip ) override;
+
+    virtual sal_Int32 SAL_CALL available(  ) override;
+
+    virtual void SAL_CALL closeInput(  ) override;
+
+    virtual void SAL_CALL seek( sal_Int64 location ) override;
+    virtual sal_Int64 SAL_CALL getPosition(  ) override;
+    virtual sal_Int64 SAL_CALL getLength(  ) override;
+
+// css::lang::XUnoTunnel
+    virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
+
+// comphelper::ByteReader
+    virtual sal_Int32 readSomeBytes( sal_Int8* pData, sal_Int32 nBytesToRead ) override;
+
+private:
+    sal_Int32 avail();
+};
+
+// don't export to avoid duplicate WeakImplHelper definitions with MSVC
+class SAL_DLLPUBLIC_TEMPLATE OSequenceOutputStream_Base
+    : public ::cppu::WeakImplHelper< css::io::XOutputStream >
+{};
+
+class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OSequenceOutputStream final : public OSequenceOutputStream_Base
+{
+private:
+    css::uno::Sequence< sal_Int8 >&                 m_rSequence;
+    double                                          m_nResizeFactor;
+    sal_Int32 const                                 m_nMinimumResize;
+    sal_Int32                                       m_nSize;
+        // the size of the virtual stream. This is not the size of the sequence, but the number of bytes written
+        // into the stream at a given moment.
+
+    bool                                            m_bConnected;
+        // closeOutput has been called ?
+
+    std::mutex                                      m_aMutex;
+
+    void finalizeOutput();
+    virtual ~OSequenceOutputStream() override { if (m_bConnected) finalizeOutput(); }
+
+public:
+    /** constructs the object. Everything written into the stream through the XOutputStream methods will be forwarded
+        to the sequence, reallocating it if necessary. Writing will start at offset 0 within the sequence.
+        @param      _rSeq               a reference to the sequence which will be used for output.
+                                        The caller is responsible for taking care of the lifetime of the stream
+                                        object and the sequence. If you're in doubt about this, use <code>closeOutput</code>
+                                        before destroying the sequence
+        @param      _nResizeFactor      the factor which is used for resizing the sequence when necessary. In every
+                                        resize step, the new sequence size will be calculated by multiplying the current
+                                        size with this factor, rounded off to the next multiple of 4.
+        @param      _nMinimumResize     the minimal number of bytes which is additionally allocated on resizing
+        @see        closeOutput
+    */
+    OSequenceOutputStream(
+        css::uno::Sequence< sal_Int8 >& _rSeq,
+        double _nResizeFactor = 1.3,
+        sal_Int32 _nMinimumResize = 128
+        );
+
+    /// same as XOutputStream::writeBytes (as expected :)
+    virtual void SAL_CALL writeBytes( const css::uno::Sequence< sal_Int8 >& aData ) override;
+    /// this is a dummy in this implementation, no buffering is used
+    virtual void SAL_CALL flush(  ) override;
+    /** closes the output stream. In the case of this class, this means that the sequence used for writing is
+        resized to the really used size and not used any further, every subsequent call to one of the XOutputStream
+        methods will throw a <code>NotConnectedException</code>.
+    */
+    virtual void SAL_CALL closeOutput(  ) override;
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_SEQSTREAM_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/sequence.hxx b/include/comphelper/sequence.hxx
new file mode 100644
index 000000000..bc67559df
--- /dev/null
+++ b/include/comphelper/sequence.hxx
@@ -0,0 +1,322 @@
+/* -*- 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_COMPHELPER_SEQUENCE_HXX
+#define INCLUDED_COMPHELPER_SEQUENCE_HXX
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <osl/diagnose.h>
+
+#include <algorithm>
+#include <vector>
+
+namespace comphelper
+{
+    /** Search the given value within the given sequence, return the position of the first occurrence.
+        Returns -1 if nothing found.
+    */
+    template <class T1, class T2>
+    inline sal_Int32 findValue(const css::uno::Sequence<T1>& _rList, const T2& _rValue)
+    {
+        // at which position do I find the value?
+        for (sal_Int32 i = 0; i < _rList.getLength(); ++i)
+        {
+            if (_rList[i] == _rValue)
+                return i;
+        }
+
+        return -1;
+    }
+
+    /// concat several sequences
+    template <class T, class... Ss>
+    inline css::uno::Sequence<T> concatSequences(const css::uno::Sequence<T>& rS1, const Ss&... rSn)
+    {
+        // unary fold to disallow empty parameter pack: at least have one sequence in rSn
+        css::uno::Sequence<T> aReturn(std::size(rS1) + (... + std::size(rSn)));
+        T* pReturn = std::copy(std::begin(rS1), std::end(rS1), aReturn.getArray());
+        (..., (pReturn = std::copy(std::begin(rSn), std::end(rSn), pReturn)));
+        return aReturn;
+    }
+
+    /// concat additional elements from right sequence to left sequence
+    ///
+    /// be aware that this takes time O(|left| * |right|)
+    template<typename T> inline css::uno::Sequence<T> combineSequences(
+        css::uno::Sequence<T> const & left, css::uno::Sequence<T> const & right)
+    {
+        sal_Int32 n1 = left.getLength();
+        css::uno::Sequence<T> ret(n1 + right.getLength());
+            //TODO: check for overflow
+        auto pRet = ret.getArray();
+        std::copy_n(left.getConstArray(), n1, pRet);
+        sal_Int32 n2 = n1;
+        for (sal_Int32 i = 0; i != right.getLength(); ++i) {
+            bool found = false;
+            for (sal_Int32 j = 0; j != n1; ++j) {
+                if (right[i] == left[j]) {
+                    found = true;
+                    break;
+                }
+            }
+            if (!found) {
+                pRet[n2++] = right[i];
+            }
+        }
+        ret.realloc(n2);
+        return ret;
+    }
+
+    /// remove a specified element from a sequences
+    template<class T>
+    inline void removeElementAt(css::uno::Sequence<T>& _rSeq, sal_Int32 _nPos)
+    {
+        sal_Int32 nLength = _rSeq.getLength();
+
+        OSL_ENSURE(0 <= _nPos && _nPos < nLength, "invalid index");
+
+        T* pPos = _rSeq.getArray() + _nPos;
+        std::move(pPos + 1, pPos + nLength - _nPos, pPos);
+
+        _rSeq.realloc(nLength-1);
+    }
+
+    /** Copy from a plain C/C++ array into a Sequence.
+
+        @tpl SrcType
+        Array element type. Must be assignable to DstType
+
+        @tpl DstType
+        Sequence element type. Must be assignable from SrcType
+
+        @param i_pArray
+        Valid pointer to at least num elements of type SrcType
+
+        @param nNum
+        Number of array elements to copy
+
+        @return the resulting Sequence
+
+        @attention when copying from e.g. a double array to a
+        Sequence<int>, no proper rounding will be performed, but the
+        values will be truncated. There's currently no measure to
+        prevent or detect precision loss, overflow or truncation.
+     */
+    template < typename DstType, typename SrcType >
+    inline css::uno::Sequence< DstType > arrayToSequence( const SrcType* i_pArray, sal_Int32 nNum )
+    {
+        if constexpr (std::is_same_v< DstType, SrcType >)
+        {
+            return css::uno::Sequence< DstType >( i_pArray, nNum );
+        }
+        else
+        {
+            css::uno::Sequence< DstType > result( nNum );
+            ::std::copy( i_pArray, i_pArray+nNum, result.getArray() );
+            return result;
+        }
+    }
+
+
+    /** Copy from a Sequence into a plain C/C++ array
+
+        @tpl SrcType
+        Sequence element type. Must be assignable to DstType
+
+        @tpl DstType
+        Array element type. Must be assignable from SrcType
+
+        @param io_pArray
+        Valid pointer to at least i_Sequence.getLength() elements of
+        type DstType
+
+        @param i_Sequence
+        Reference to a Sequence of SrcType elements
+
+        @return a pointer to the array
+
+        @attention when copying from e.g. a Sequence<double> to an int
+        array, no proper rounding will be performed, but the values
+        will be truncated. There's currently no measure to prevent or
+        detect precision loss, overflow or truncation.
+     */
+    template < typename DstType, typename SrcType >
+    inline DstType* sequenceToArray( DstType* io_pArray, const css::uno::Sequence< SrcType >& i_Sequence )
+    {
+        ::std::copy( i_Sequence.begin(), i_Sequence.end(), io_pArray );
+        return io_pArray;
+    }
+
+
+    /** Copy from a container into a Sequence
+
+        @tpl SrcType
+        Container type. This type must fulfill the STL container
+        concept, in particular, the size(), begin() and end() methods
+        must be available and have the usual semantics.
+
+        @tpl DstType
+        Sequence element type. Must be assignable from SrcType's
+        elements
+
+        @param i_Container
+        Reference to the input contain with elements of type SrcType
+
+        @return the generated Sequence
+
+        @attention this function always performs a copy. Furthermore,
+        when copying from e.g. a vector<double> to a Sequence<int>, no
+        proper rounding will be performed, but the values will be
+        truncated. There's currently no measure to prevent or detect
+        precision loss, overflow or truncation.
+     */
+    template < typename DstElementType, typename SrcType >
+    inline css::uno::Sequence< DstElementType > containerToSequence( const SrcType& i_Container )
+    {
+        using ::std::size, ::std::begin, ::std::end;
+        css::uno::Sequence< DstElementType > result( size(i_Container) );
+        ::std::copy( begin(i_Container), end(i_Container), result.getArray() );
+        return result;
+    }
+
+    // this one does better type deduction, but does not allow us to copy into a different element type
+    template < typename SrcType >
+    inline css::uno::Sequence< typename SrcType::value_type > containerToSequence( const SrcType& i_Container )
+    {
+        return containerToSequence<typename SrcType::value_type, SrcType>(i_Container);
+    }
+
+    // handle arrays
+    template<typename ElementType, std::size_t SrcSize>
+    inline css::uno::Sequence< ElementType > containerToSequence( ElementType const (&i_Array)[ SrcSize ] )
+    {
+        return css::uno::Sequence< ElementType >( i_Array, SrcSize );
+    }
+
+    template <typename T>
+    inline css::uno::Sequence<T> containerToSequence(
+        ::std::vector<T> const& v )
+    {
+        return css::uno::Sequence<T>(
+            v.data(), static_cast<sal_Int32>(v.size()) );
+    }
+
+
+    /** Copy from a Sequence into a container
+
+        @tpl SrcType
+        Sequence element type. Must be assignable to SrcType's
+        elements
+
+        @tpl DstType
+        Container type. This type must have a constructor taking a pair
+        of iterators defining a range to copy from
+
+        @param i_Sequence
+        Reference to a Sequence of SrcType elements
+
+        @return the generated container. C++17 copy elision rules apply
+
+        @attention this function always performs a copy. Furthermore,
+        when copying from e.g. a Sequence<double> to a vector<int>, no
+        proper rounding will be performed, but the values will be
+        truncated. There's currently no measure to prevent or detect
+        precision loss, overflow or truncation.
+     */
+    template < typename DstType, typename SrcType >
+    inline DstType sequenceToContainer( const css::uno::Sequence< SrcType >& i_Sequence )
+    {
+        return DstType(i_Sequence.begin(), i_Sequence.end());
+    }
+
+    // this one does better type deduction, but does not allow us to copy into a different element type
+    template < typename DstType >
+    inline DstType sequenceToContainer( const css::uno::Sequence< typename DstType::value_type >& i_Sequence )
+    {
+        return DstType(i_Sequence.begin(), i_Sequence.end());
+    }
+
+    /** Copy from a Sequence into an existing container
+
+        This potentially saves a needless extra copy operation over
+        the whole container, as it passes the target object by
+        reference.
+
+        @tpl SrcType
+        Sequence element type. Must be assignable to SrcType's
+        elements
+
+        @tpl DstType
+        Container type. This type must fulfill the STL container and
+        sequence concepts, in particular, the begin(), end() and
+        resize(int) methods must be available and have the usual
+        semantics.
+
+        @param o_Output
+        Reference to the target container
+
+        @param i_Sequence
+        Reference to a Sequence of SrcType elements
+
+        @return a non-const reference to the given container
+
+        @attention this function always performs a copy. Furthermore,
+        when copying from e.g. a Sequence<double> to a vector<int>, no
+        proper rounding will be performed, but the values will be
+        truncated. There's currently no measure to prevent or detect
+        precision loss, overflow or truncation.
+     */
+    template < typename DstType, typename SrcType >
+    inline DstType& sequenceToContainer( DstType& o_Output, const css::uno::Sequence< SrcType >& i_Sequence )
+    {
+        o_Output.resize( i_Sequence.getLength() );
+        ::std::copy( i_Sequence.begin(), i_Sequence.end(), o_Output.begin() );
+        return o_Output;
+    }
+
+    /** Copy (keys or values) from an associate container into a Sequence
+
+        @tpl M map container type eg. std::map/std::unordered_map
+
+        @return the generated Sequence
+     */
+    template < typename M >
+    inline css::uno::Sequence< typename M::key_type > mapKeysToSequence( M const& map )
+    {
+        css::uno::Sequence< typename M::key_type > ret( static_cast<sal_Int32>(map.size()) );
+        std::transform(map.begin(), map.end(), ret.getArray(),
+                       [](const auto& i) { return i.first; });
+        return ret;
+    }
+
+    template < typename M >
+    inline css::uno::Sequence< typename M::mapped_type > mapValuesToSequence( M const& map )
+    {
+        css::uno::Sequence< typename M::mapped_type > ret( static_cast<sal_Int32>(map.size()) );
+        std::transform(map.begin(), map.end(), ret.getArray(),
+                       [](const auto& i) { return i.second; });
+        return ret;
+    }
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_SEQUENCE_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/sequenceashashmap.hxx b/include/comphelper/sequenceashashmap.hxx
new file mode 100644
index 000000000..59ab4c298
--- /dev/null
+++ b/include/comphelper/sequenceashashmap.hxx
@@ -0,0 +1,426 @@
+/* -*- 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_COMPHELPER_SEQUENCEASHASHMAP_HXX
+#define INCLUDED_COMPHELPER_SEQUENCEASHASHMAP_HXX
+
+#include <unordered_map>
+#include <com/sun/star/uno/Sequence.hxx>
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::beans { struct NamedValue; }
+namespace com::sun::star::beans { struct PropertyValue; }
+
+namespace comphelper{
+
+
+/** @short  Implements a stl hash map on top of some
+            specialized sequence from type PropertyValue
+            or NamedValue.
+
+    @descr  That provides the possibility to modify
+            such name sequences very easy ...
+ */
+
+/** Cache the hash code since calculating it for every comparison adds up */
+struct OUStringAndHashCode
+{
+    OUString maString;
+    sal_Int32 mnHashCode;
+
+    OUStringAndHashCode(OUString s) : maString(s), mnHashCode(maString.hashCode()) {}
+};
+struct OUStringAndHashCodeEqual
+{
+    bool operator()(const OUStringAndHashCode & lhs, const OUStringAndHashCode & rhs) const
+    {
+        return lhs.mnHashCode == rhs.mnHashCode && lhs.maString == rhs.maString;
+    }
+};
+struct OUStringAndHashCodeHash
+{
+    size_t operator()(const OUStringAndHashCode & i) const
+    {
+        return i.mnHashCode;
+    }
+};
+using SequenceAsHashMapBase = std::unordered_map<OUStringAndHashCode, css::uno::Any, OUStringAndHashCodeHash, OUStringAndHashCodeEqual>;
+
+class SAL_WARN_UNUSED COMPHELPER_DLLPUBLIC SequenceAsHashMap
+{
+
+    public:
+
+
+        /** @short  creates an empty hash map.
+         */
+        SequenceAsHashMap();
+
+
+        /** @see    operator<<(const css::uno::Any&)
+         */
+        SequenceAsHashMap(const css::uno::Any& aSource);
+
+
+        /** @see    operator<<(const css::uno::Sequence< css::uno::Any >&)
+         */
+        SequenceAsHashMap(const css::uno::Sequence< css::uno::Any >& lSource);
+
+
+        /** @see    operator<<(const css::uno::Sequence< css::beans::PropertyValue >&)
+         */
+        SequenceAsHashMap(const css::uno::Sequence< css::beans::PropertyValue >& lSource);
+
+
+        /** @see    operator<<(const css::uno::Sequence< css::beans::NamedValue >&)
+         */
+        SequenceAsHashMap(const css::uno::Sequence< css::beans::NamedValue >& lSource);
+
+
+        /** @short  fill this map from the given
+                    Any, which of course must contain
+                    a suitable sequence of element types
+                    "css.beans.PropertyValue" or "css.beans.NamedValue".
+
+            @attention  If the given Any is an empty one
+                        (if it's set to VOID), no exception
+                        is thrown. In such case this instance will
+                        be created as an empty one too!
+
+            @param  aSource
+                    contains the new items for this map.
+
+            @throw  A css::lang::IllegalArgumentException
+                    is thrown, if the given Any does not contain a suitable sequence ...
+                    but not if it's a VOID Any!
+         */
+        void operator<<(const css::uno::Any& aSource);
+
+
+        /** @short  fill this map from the given
+                    sequence, where every Any must contain
+                    an item from type "css.beans.PropertyValue"
+                    "css.beans.NamedValue".
+
+            @param  lSource
+                    contains the new items for this map.
+
+            @throw  A css::lang::IllegalArgumentException
+                    is thrown, if the given Any sequence
+                    uses wrong types for its items. VOID Any will be ignored!
+         */
+        void operator<<(const css::uno::Sequence< css::uno::Any >& lSource);
+
+
+        /** @short  fill this map from the given
+                    PropertyValue sequence.
+
+            @param  lSource
+                    contains the new items for this map.
+         */
+        void operator<<(const css::uno::Sequence< css::beans::PropertyValue >& lSource);
+
+
+        /** @short  fill this map from the given
+                    NamedValue sequence.
+
+            @param  lSource
+                    contains the new items for this map.
+         */
+        void operator<<(const css::uno::Sequence< css::beans::NamedValue >& lSource);
+
+
+        /** @short  converts this map instance to an
+                    PropertyValue sequence.
+
+            @param  lDestination
+                    target sequence for converting.
+         */
+        void operator>>(css::uno::Sequence< css::beans::PropertyValue >& lDestination) const;
+
+
+        /** @short  converts this map instance to an
+                    NamedValue sequence.
+
+            @param  lDestination
+                    target sequence for converting.
+         */
+        void operator>>(css::uno::Sequence< css::beans::NamedValue >& lDestination) const;
+
+
+        /** @short  return this map instance as an
+                    Any, which can be
+                    used in const environments only.
+
+            @descr  It's made const to prevent using of the
+                    return value directly as an in/out parameter!
+                    usage: myMethod(stlDequeAdapter.getAsAnyList());
+
+            @param  bAsPropertyValue
+                    switch between using of PropertyValue or NamedValue as
+                    value type.
+
+            @return A const Any, which
+                    contains all items of this map.
+         */
+        css::uno::Any getAsConstAny(bool bAsPropertyValue) const;
+
+
+        /** @short  return this map instance to as a
+                    NamedValue sequence, which can be
+                    used in const environments only.
+
+            @descr  It's made const to prevent using of the
+                    return value directly as an in/out parameter!
+                    usage: myMethod(stlDequeAdapter.getAsNamedValueList());
+
+            @return A const sequence of type NamedValue, which
+                    contains all items of this map.
+         */
+        css::uno::Sequence< css::beans::NamedValue > getAsConstNamedValueList() const;
+
+
+        /** @short  return this map instance to as a
+                    PropertyValue sequence, which can be
+                    used in const environments only.
+
+            @descr  It's made const to prevent using of the
+                    return value directly as an in/out parameter!
+                    usage: myMethod(stlDequeAdapter.getAsPropertyValueList());
+
+            @return A const sequence of type PropertyValue, which
+                    contains all items of this map.
+         */
+        css::uno::Sequence< css::beans::PropertyValue > getAsConstPropertyValueList() const;
+
+
+        /** @short  check if the specified item exists
+                    and return its (unpacked!) value or it returns the
+                    specified default value otherwise.
+
+            @descr  If a value should be extracted only in case
+                    the requested property exists really (without creating
+                    of new items as it the index operator of a
+                    hash map does!) this method can be used.
+
+            @param  sKey
+                    key name of the item.
+
+            @param  aDefault
+                    the default value, which is returned
+                    if the specified item could not
+                    be found.
+
+            @return The (unpacked!) value of the specified property or
+                    the given default value otherwise.
+
+            @attention  "unpacked" means the Any content of every iterator->second!
+         */
+        template< class TValueType >
+        TValueType getUnpackedValueOrDefault(const OUString& sKey    ,
+                                             const TValueType&      aDefault) const
+        {
+            auto pIt = m_aMap.find(sKey);
+            if (pIt == m_aMap.end())
+                return aDefault;
+
+            TValueType aValue = TValueType();
+            if (!(pIt->second >>= aValue))
+                return aDefault;
+
+            return aValue;
+        }
+
+        /** @short  check if the specified item exists
+                    and return its value or it returns
+                    an empty css::uno::Any.
+
+            @descr  If a value should be extracted only in case
+                    the requested property exists really (without creating
+                    of new items as the index operator of a
+                    hash map does!) this method can be used.
+
+            @param  sKey
+                    key name of the item.
+
+            @return The value of the specified property or
+                    an empty css::uno::Any.
+         */
+        css::uno::Any getValue(const OUString& sKey) const
+        {
+            auto pIt = m_aMap.find(sKey);
+            if (pIt == m_aMap.end())
+                return css::uno::Any();
+
+            return pIt->second;
+        }
+
+
+        /** @short  creates a new item with the specified
+                    name and value only in case such item name
+                    does not already exist.
+
+            @descr  To check if the property already exists only
+                    its name is used for compare. Its value isn't
+                    checked!
+
+            @param  sKey
+                    key name of the property.
+
+            @param  aValue
+                    the new (unpacked!) value.
+                    Note: This value will be transformed to an Any
+                    internally, because only Any values can be
+                    part of a PropertyValue or NamedValue structure.
+
+            @return TRUE if this property was added as new item;
+                    FALSE if it already exists.
+         */
+        template< class TValueType >
+        bool createItemIfMissing(const OUString& sKey  ,
+                                     const TValueType&      aValue)
+        {
+            if (m_aMap.find(sKey) == m_aMap.end())
+            {
+                (*this)[sKey] = css::uno::toAny(aValue);
+                return true;
+            }
+
+            return false;
+        }
+
+
+        /** @short  check if all items of given map
+                    exists in these called map also.
+
+            @descr  Every item of the given map must exists
+                    with same name and value inside these map.
+                    But these map can contain additional items
+                    which are not part of the search-map.
+
+            @param  rCheck
+                    the map containing all items for checking.
+
+            @return
+                    TRUE if all items of Rcheck could be found
+                    in these map; FALSE otherwise.
+         */
+        bool match(const SequenceAsHashMap& rCheck) const;
+
+
+        /** @short  merge all values from the given map into
+                    this one.
+
+            @descr  Existing items will be overwritten ...
+                    missing items will be created new ...
+                    but non specified items will stay alive !
+
+            @param  rSource
+                    the map containing all items for the update.
+         */
+        void update(const SequenceAsHashMap& rSource);
+
+        css::uno::Any& operator[](const OUString& rKey)
+        {
+            return m_aMap[rKey];
+        }
+
+        css::uno::Any& operator[](const OUStringAndHashCode& rKey)
+        {
+            return m_aMap[rKey];
+        }
+
+        using iterator = SequenceAsHashMapBase::iterator;
+        using const_iterator = SequenceAsHashMapBase::const_iterator;
+
+        void clear()
+        {
+            m_aMap.clear();
+        }
+
+        size_t size() const
+        {
+            return m_aMap.size();
+        }
+
+        bool empty() const
+        {
+            return m_aMap.empty();
+        }
+
+        iterator begin()
+        {
+            return m_aMap.begin();
+        }
+
+        const_iterator begin() const
+        {
+            return m_aMap.begin();
+        }
+
+        iterator end()
+        {
+            return m_aMap.end();
+        }
+
+        const_iterator end() const
+        {
+            return m_aMap.end();
+        }
+
+        iterator find(const OUString& rKey)
+        {
+            return m_aMap.find(rKey);
+        }
+
+        const_iterator find(const OUString& rKey) const
+        {
+            return m_aMap.find(rKey);
+        }
+
+        iterator find(const OUStringAndHashCode& rKey)
+        {
+            return m_aMap.find(rKey);
+        }
+
+        const_iterator find(const OUStringAndHashCode& rKey) const
+        {
+            return m_aMap.find(rKey);
+        }
+
+        iterator erase(iterator it)
+        {
+            return m_aMap.erase(it);
+        }
+
+        size_t erase(const OUString& rKey)
+        {
+            return m_aMap.erase(rKey);
+        }
+
+private:
+        SequenceAsHashMapBase m_aMap;
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_SEQUENCEASHASHMAP_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/servicedecl.hxx b/include/comphelper/servicedecl.hxx
new file mode 100644
index 000000000..57da446e6
--- /dev/null
+++ b/include/comphelper/servicedecl.hxx
@@ -0,0 +1,155 @@
+/* -*- 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_COMPHELPER_SERVICEDECL_HXX
+#define INCLUDED_COMPHELPER_SERVICEDECL_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <com/sun/star/uno/XComponentContext.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+#include <functional>
+#include <initializer_list>
+
+namespace comphelper::service_decl {
+
+class ServiceDecl;
+
+namespace detail {
+typedef ::std::function<
+    css::uno::Reference<css::uno::XInterface> /* return */
+    (ServiceDecl const&,
+     css::uno::Sequence<css::uno::Any> const&,
+     css::uno::Reference<css::uno::XComponentContext> const&)> CreateFuncF;
+}
+
+/** Class to declare a service implementation.  There is no need to implement
+    lang::XServiceInfo nor lang::XInitialization anymore.
+    The declaration can be done in various ways, the (simplest) form is
+
+    <pre>
+    class MyClass : public cppu::WeakImplHelper<XInterface1, XInterface2> {
+    public:
+        MyClass( uno::Reference<uno::XComponentContext> const& xContext )
+        [...]
+    };
+    [...]
+    namespace sdecl = comphelper::service_decl;
+    sdecl::ServiceDecl const myDecl(
+        sdecl::class_<MyClass>(),
+        "my.unique.implementation.name",
+        "MyServiceSpec1;MyServiceSpec2" );
+    </pre>
+
+    If the service demands initialization by arguments, the implementation
+    class has to define a constructor taking both arguments and component
+    context:
+
+    <pre>
+    class MyClass : public cppu::WeakImplHelper<XInterface1, XInterface2> {
+    public:
+        MyClass( uno::Sequence<uno::Any> const& args,
+                 uno::Reference<uno:XComponentContext> const& xContext )
+        [...]
+    };
+    [...]
+    namespace sdecl = comphelper::service_decl;
+    sdecl::ServiceDecl const myDecl(
+        sdecl::class_<MyClass, sdecl::with_args<true> >(),
+        "my.unique.implementation.name",
+        "MyServiceSpec1;MyServiceSpec2" );
+    </pre>
+
+    Additionally, there is the possibility to process some code after creation,
+    e.g. to add the newly created object as a listener or perform aggregation
+    (C++-UNO only):
+
+    <pre>
+    uno::Reference<uno::XInterface> somePostProcCode( MyClass * p );
+    [...]
+    namespace sdecl = comphelper::service_decl;
+    sdecl::ServiceDecl const myDecl(
+        sdecl::class_<MyClass, ... >(&somePostProcCode),
+        "my.unique.implementation.name",
+        "MyServiceSpec1;MyServiceSpec2" );
+    </pre>
+
+    In the latter case, somePostProcCode gets the yet unacquired "raw" pointer.
+*/
+class COMPHELPER_DLLPUBLIC ServiceDecl
+{
+public:
+    /** Ctor for multiple supported service names.
+
+        @param implClass implementation class description
+        @param pImplName implementation name
+        @param pSupportedServiceNames supported service names
+        @param cDelim delimiter for supported service names
+    */
+    ServiceDecl( const ServiceDecl& ) = delete;
+    ServiceDecl& operator=( const ServiceDecl& ) = delete;
+    template <typename ImplClassT>
+    ServiceDecl( ImplClassT const& implClass,
+                 char const* pImplName,
+                 char const* pSupportedServiceNames )
+        : m_createFunc(implClass.m_createFunc),
+          m_pImplName(pImplName),
+          m_pServiceNames(pSupportedServiceNames) {}
+
+    /// @internal gets called by component_getFactoryHelper()
+    void * getFactory( char const* pImplName ) const;
+
+    /// @return supported service names
+    css::uno::Sequence< OUString> getSupportedServiceNames() const;
+
+    /// @return whether name is in set of supported service names
+    bool supportsService( std::u16string_view name ) const;
+
+    /// @return implementation name
+    OUString getImplementationName() const;
+
+private:
+    class Factory;
+    friend class Factory;
+
+    detail::CreateFuncF const m_createFunc;
+    char const* const m_pImplName;
+    char const* const m_pServiceNames;
+};
+
+/** To specify whether the implementation class expects arguments
+    (uno::Sequence<uno::Any>).
+*/
+template <bool> struct with_args;
+
+/// @internal
+namespace detail {
+
+} // namespace detail
+
+
+COMPHELPER_DLLPUBLIC
+void* component_getFactoryHelper( const char* pImplName,
+                                  std::initializer_list<ServiceDecl const *> args );
+
+} // namespace comphelper::service_decl
+
+
+#endif //  ! defined( INCLUDED_COMPHELPER_SERVICEDECL_HXX)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/servicehelper.hxx b/include/comphelper/servicehelper.hxx
new file mode 100644
index 000000000..c225494cc
--- /dev/null
+++ b/include/comphelper/servicehelper.hxx
@@ -0,0 +1,152 @@
+/* -*- 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_COMPHELPER_SERVICEHELPER_HXX
+#define INCLUDED_COMPHELPER_SERVICEHELPER_HXX
+
+#include <rtl/uuid.h>
+#include <com/sun/star/lang/XUnoTunnel.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+
+namespace comphelper {
+
+    // Class incapsulating UIDs used as e.g. tunnel IDs for css::lang::XUnoTunnel,
+    // or implementation IDs for css::lang::XTypeProvider
+    class UnoIdInit
+    {
+    private:
+        css::uno::Sequence< sal_Int8 > m_aSeq;
+    public:
+        UnoIdInit() : m_aSeq(16)
+        {
+            rtl_createUuid(reinterpret_cast<sal_uInt8*>(m_aSeq.getArray()), nullptr, true);
+        }
+        const css::uno::Sequence< sal_Int8 >& getSeq() const { return m_aSeq; }
+    };
+
+    inline sal_Int64 getSomething_cast(void* p)
+    {
+        return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(p));
+    }
+
+    template<class T> inline T* getSomething_cast(sal_Int64 n)
+    {
+        return reinterpret_cast<T*>(sal::static_int_cast<sal_IntPtr>(n));
+    }
+
+    template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::lang::XUnoTunnel>& xUT)
+    {
+        if (!xUT.is())
+            return nullptr;
+
+        return getSomething_cast<T>(xUT->getSomething(T::getUnoTunnelId()));
+    }
+
+    // Takes an interface
+    template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::uno::XInterface>& xIface)
+    {
+        return getFromUnoTunnel<T>(
+            css::uno::Reference<css::lang::XUnoTunnel>{ xIface, css::uno::UNO_QUERY });
+    }
+
+    // Takes an Any
+    template <class T> T* getFromUnoTunnel(const css::uno::Any& rAny)
+    {
+        // For unclear reason, using a Reference ctor taking an Any
+        // gives different results compared to use of operator >>=.
+        css::uno::Reference<css::lang::XUnoTunnel> xUnoTunnel;
+        rAny >>= xUnoTunnel;
+        return getFromUnoTunnel<T>(xUnoTunnel);
+    }
+
+    template <typename T>
+    inline bool isUnoTunnelId(const css::uno::Sequence< sal_Int8 >& rId)
+    {
+        return rId.getLength() == 16
+            && memcmp(T::getUnoTunnelId().getConstArray(), rId.getConstArray(), 16) == 0;
+    }
+
+    template <class Base> struct FallbackToGetSomethingOf
+    {
+        static sal_Int64 get(const css::uno::Sequence<sal_Int8>& rId, Base* p)
+        {
+            return p->Base::getSomething(rId);
+        }
+    };
+
+    template <> struct FallbackToGetSomethingOf<void>
+    {
+        static sal_Int64 get(const css::uno::Sequence<sal_Int8>&, void*) { return 0; }
+    };
+
+    template <class T, class Base = void>
+    sal_Int64 getSomethingImpl(const css::uno::Sequence<sal_Int8>& rId, T* pThis,
+        FallbackToGetSomethingOf<Base> = {})
+    {
+        if (isUnoTunnelId<T>(rId))
+            return getSomething_cast(pThis);
+
+        return FallbackToGetSomethingOf<Base>::get(rId, pThis);
+    }
+
+}
+
+/** the UNO3_GETIMPLEMENTATION_* macros  implement a static helper function
+    that gives access to your implementation for a given interface reference,
+    if possible.
+
+    Example:
+        MyClass* pClass = comphelper::getFromUnoTunnel<MyClass>( xRef );
+
+    Usage:
+        Put a UNO3_GETIMPLEMENTATION_DECL( classname ) inside your class
+        definition and UNO3_GETIMPLEMENTATION_IMPL( classname ) inside
+        your cxx file. Your class must inherit css::lang::XUnoTunnel
+        and export it with queryInterface. Implementation of XUnoTunnel is
+        done by this macro.
+*/
+#define UNO3_GETIMPLEMENTATION_DECL( classname ) \
+    static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId() noexcept; \
+    virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
+
+#define UNO3_GETIMPLEMENTATION_BASE_IMPL( classname ) \
+const css::uno::Sequence< sal_Int8 > & classname::getUnoTunnelId() noexcept \
+{ \
+    static const comphelper::UnoIdInit aId; \
+    return aId.getSeq(); \
+}
+
+#define UNO3_GETIMPLEMENTATION_IMPL( classname )\
+UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
+sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
+{ \
+    return comphelper::getSomethingImpl(rId, this); \
+}
+
+#define UNO3_GETIMPLEMENTATION2_IMPL( classname, baseclass )\
+UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
+sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
+{ \
+    return comphelper::getSomethingImpl(rId, this, comphelper::FallbackToGetSomethingOf<baseclass>{}); \
+}
+
+
+#endif // INCLUDED_COMPHELPER_SERVICEHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/sharedmutex.hxx b/include/comphelper/sharedmutex.hxx
new file mode 100644
index 000000000..a92c7ccb3
--- /dev/null
+++ b/include/comphelper/sharedmutex.hxx
@@ -0,0 +1,77 @@
+/* -*- 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_COMPHELPER_SHAREDMUTEX_HXX
+#define INCLUDED_COMPHELPER_SHAREDMUTEX_HXX
+
+#include <comphelper/comphelperdllapi.h>
+#include <memory>
+
+namespace osl { class Mutex; }
+
+namespace comphelper
+{
+
+
+    //= SharedMutex
+
+    class COMPHELPER_DLLPUBLIC SharedMutex
+    {
+    public:
+        SharedMutex();
+
+        operator ::osl::Mutex& () { return *m_pMutexImpl; }
+
+    private:
+        std::shared_ptr< ::osl::Mutex >  m_pMutexImpl;
+    };
+
+
+    //= SharedMutexBase
+
+    /** sometimes, it's necessary to have an initialized ::osl::Mutex to pass
+        to some ctor call of your base class. In this case, you can't hold the
+        SharedMutex as member, but you need to move it into another base class,
+        which is initialized before the mutex-requiring class is.
+    */
+    class COMPHELPER_DLLPUBLIC SharedMutexBase
+    {
+    protected:
+        SharedMutexBase()
+        {
+        }
+        ~SharedMutexBase()
+        {
+        }
+
+    protected:
+        ::osl::Mutex&   getMutex() const { return m_aMutex; }
+        SharedMutex&    getSharedMutex() const { return m_aMutex; }
+
+    private:
+        mutable SharedMutex m_aMutex;
+    };
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_SHAREDMUTEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/simplefileaccessinteraction.hxx b/include/comphelper/simplefileaccessinteraction.hxx
new file mode 100644
index 000000000..e9295d4d7
--- /dev/null
+++ b/include/comphelper/simplefileaccessinteraction.hxx
@@ -0,0 +1,52 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_SIMPLEFILEACCESSINTERACTION_HXX
+#define INCLUDED_COMPHELPER_SIMPLEFILEACCESSINTERACTION_HXX
+
+#include <sal/config.h>
+#include <ucbhelper/interceptedinteraction.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::task { class XInteractionHandler; }
+namespace com::sun::star::task { class XInteractionRequest; }
+
+namespace comphelper {
+/** An interaction handler wrapper for simple file access.
+
+    This wrapper is to be used together with XSimpleFileAccess when
+    you want to avoid the error messages displayed when accessing a file (the messages activated
+    by ucphelper::cancelCommandExecution).
+
+    This wrapper is especially useful when you need to access a Web/DAV connection
+    enabling https certificate validation and optionally enabling the authentication
+    dialog that may be needed in these operations.
+
+    @param xHandler
+    Used handler, always needed.
+    It will be used for Certificate Validation dialog or authentication dialog.
+    The authentication is used in Web/DAV access when the server requests credentials to be accessed.
+*/
+class COMPHELPER_DLLPUBLIC SimpleFileAccessInteraction final : public ::ucbhelper::InterceptedInteraction
+{
+
+public:
+    SimpleFileAccessInteraction(const css::uno::Reference< css::task::XInteractionHandler >& xHandler);
+    virtual ~SimpleFileAccessInteraction() override;
+
+private:
+
+    virtual ucbhelper::InterceptedInteraction::EInterceptionState intercepted(const ::ucbhelper::InterceptedInteraction::InterceptedRequest& aRequest,
+        const css::uno::Reference< css::task::XInteractionRequest >& xRequest) override;
+
+};
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/solarmutex.hxx b/include/comphelper/solarmutex.hxx
new file mode 100644
index 000000000..4094e08ee
--- /dev/null
+++ b/include/comphelper/solarmutex.hxx
@@ -0,0 +1,98 @@
+/* -*- 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_COMPHELPER_SOLARMUTEX_HXX
+#define INCLUDED_COMPHELPER_SOLARMUTEX_HXX
+
+#include <sal/config.h>
+
+#include <assert.h>
+#include <atomic>
+
+#include <osl/thread.h>
+#include <osl/mutex.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper {
+
+
+/**
+ * SolarMutex, needed for VCL's Application::GetSolarMutex().
+ *
+ * The SolarMutex is the one big recursive code lock used
+ * to protect the vast majority of the LibreOffice code-base,
+ * in particular anything that is graphical and the cores of
+ * the applications.
+ *
+ * Treat this as a singleton, as its constructor sets a global
+ * pointing at itself.
+ */
+class COMPHELPER_DLLPUBLIC SolarMutex {
+public:
+    typedef void (*BeforeReleaseHandler) ();
+
+    SolarMutex();
+    virtual ~SolarMutex();
+
+    void SetBeforeReleaseHandler( const BeforeReleaseHandler& rLink )
+         { m_aBeforeReleaseHandler = rLink; }
+
+    void acquire( sal_uInt32 nLockCount = 1 );
+    sal_uInt32 release( bool bUnlockAll = false );
+
+    virtual bool tryToAcquire();
+
+    // returns true, if the mutex is owned by the current thread
+    virtual bool IsCurrentThread() const;
+
+    /// Help components to get the SolarMutex easily.
+    static SolarMutex *get();
+
+protected:
+    virtual sal_uInt32 doRelease( bool bUnlockAll );
+    virtual void doAcquire( sal_uInt32 nLockCount );
+
+    osl::Mutex            m_aMutex;
+    sal_uInt32            m_nCount;
+
+private:
+    std::atomic<oslThreadIdentifier> m_nThreadId;
+
+    SolarMutex(const SolarMutex&) = delete;
+    SolarMutex& operator=(const SolarMutex&) = delete;
+
+    BeforeReleaseHandler  m_aBeforeReleaseHandler;
+};
+
+inline void SolarMutex::acquire( sal_uInt32 nLockCount )
+{
+    assert( nLockCount > 0 );
+    doAcquire( nLockCount );
+}
+
+inline sal_uInt32 SolarMutex::release( bool bUnlockAll )
+{
+     return doRelease( bUnlockAll );
+}
+
+}
+
+#endif // INCLUDED_COMPHELPER_SOLARMUTEX_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/stillreadwriteinteraction.hxx b/include/comphelper/stillreadwriteinteraction.hxx
new file mode 100644
index 000000000..fb03a7ad1
--- /dev/null
+++ b/include/comphelper/stillreadwriteinteraction.hxx
@@ -0,0 +1,62 @@
+/* -*- 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_COMPHELPER_STILLREADWRITEINTERACTION_HXX
+#define INCLUDED_COMPHELPER_STILLREADWRITEINTERACTION_HXX
+
+#include <config_options.h>
+#include <ucbhelper/interceptedinteraction.hxx>
+
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::task { class XInteractionHandler; }
+namespace com::sun::star::task { class XInteractionRequest; }
+
+
+namespace comphelper{
+class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) StillReadWriteInteraction final : public ::ucbhelper::InterceptedInteraction
+{
+private:
+    static const sal_Int32 HANDLE_INTERACTIVEIOEXCEPTION       = 0;
+    static const sal_Int32 HANDLE_UNSUPPORTEDDATASINKEXCEPTION = 1;
+    static const sal_Int32 HANDLE_AUTHENTICATIONREQUESTEXCEPTION = 2;
+    static const sal_Int32 HANDLE_CERTIFICATEVALIDATIONREQUESTEXCEPTION = 3;
+
+    bool m_bUsed;
+    bool m_bHandledByMySelf;
+
+public:
+    StillReadWriteInteraction(const css::uno::Reference< css::task::XInteractionHandler >& xHandler,
+                              css::uno::Reference< css::task::XInteractionHandler > xAuxiliaryHandler);
+
+    void resetInterceptions();
+    void resetErrorStates();
+    bool wasWriteError() const { return (m_bUsed && m_bHandledByMySelf);}
+
+private:
+    css::uno::Reference< css::task::XInteractionHandler > m_xAuxiliaryHandler;
+
+    virtual ucbhelper::InterceptedInteraction::EInterceptionState intercepted(const ::ucbhelper::InterceptedInteraction::InterceptedRequest&                         aRequest,
+        const css::uno::Reference< css::task::XInteractionRequest >& xRequest) override;
+
+};
+}
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/stl_types.hxx b/include/comphelper/stl_types.hxx
new file mode 100644
index 000000000..6b21dd77d
--- /dev/null
+++ b/include/comphelper/stl_types.hxx
@@ -0,0 +1,176 @@
+/* -*- 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_COMPHELPER_STL_TYPES_HXX
+#define INCLUDED_COMPHELPER_STL_TYPES_HXX
+
+#include <sal/config.h>
+
+#include <algorithm>
+#include <memory>
+#include <string_view>
+
+#include <rtl/ustring.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <o3tl/string_view.hxx>
+
+namespace com::sun::star::uno { template <typename > class Reference; }
+
+namespace comphelper
+{
+
+// comparison functors
+
+struct UStringMixLess
+{
+    bool m_bCaseSensitive;
+public:
+    UStringMixLess(bool bCaseSensitive = true):m_bCaseSensitive(bCaseSensitive){}
+    bool operator() (std::u16string_view x, std::u16string_view y) const
+    {
+        if (m_bCaseSensitive)
+            return x < y;
+        else
+            return o3tl::compareToIgnoreAsciiCase(x, y) < 0;
+    }
+
+    bool isCaseSensitive() const {return m_bCaseSensitive;}
+};
+
+class UStringMixEqual
+{
+    bool const m_bCaseSensitive;
+
+public:
+    UStringMixEqual(bool bCaseSensitive = true):m_bCaseSensitive(bCaseSensitive){}
+    bool operator() (std::u16string_view lhs, std::u16string_view rhs) const
+    {
+        return m_bCaseSensitive ? lhs == rhs : o3tl::equalsIgnoreAsciiCase( lhs, rhs );
+    }
+    bool isCaseSensitive() const {return m_bCaseSensitive;}
+};
+
+/// by-value less functor for std::set<std::unique_ptr<T>>
+template<class T> struct UniquePtrValueLess
+{
+        bool operator()(std::unique_ptr<T> const& lhs,
+                        std::unique_ptr<T> const& rhs) const
+        {
+            assert(lhs.get());
+            assert(rhs.get());
+            return (*lhs) < (*rhs);
+        }
+        // The following are so we can search in std::set without allocating a temporary entry on the heap
+        typedef bool is_transparent;
+        bool operator()(T const& lhs,
+                        std::unique_ptr<T> const& rhs) const
+        {
+            assert(rhs.get());
+            return lhs < (*rhs);
+        }
+        bool operator()(std::unique_ptr<T> const& lhs,
+                        T const& rhs) const
+        {
+            assert(lhs.get());
+            return (*lhs) < rhs;
+        }
+};
+
+/// by-value implementation of std::foo<std::unique_ptr<T>>::operator==
+template<template<typename, typename...> class C, typename T, typename... Etc>
+bool ContainerUniquePtrEquals(
+        C<std::unique_ptr<T>, Etc...> const& lhs,
+        C<std::unique_ptr<T>, Etc...> const& rhs)
+{
+    return lhs.size() == rhs.size()
+           && std::equal(lhs.begin(), lhs.end(), rhs.begin(),
+                         [](const auto& p1, const auto& p2) { return *p1 == *p2; });
+};
+
+
+template <class Tp, class Arg>
+class mem_fun1_t
+{
+    typedef void (Tp::*_fun_type)(Arg);
+public:
+    explicit mem_fun1_t(_fun_type pf) : M_f(pf) {}
+    void operator()(Tp* p, Arg x) const { (p->*M_f)(x); }
+private:
+    _fun_type const M_f;
+};
+
+template <class Tp, class Arg>
+inline mem_fun1_t<Tp,Arg> mem_fun(void (Tp::*f)(Arg))
+{
+    return mem_fun1_t<Tp,Arg>(f);
+}
+
+/** output iterator that appends OUStrings into an OUStringBuffer.
+ */
+class OUStringBufferAppender
+{
+public:
+    typedef OUStringBufferAppender Self;
+    typedef ::std::output_iterator_tag iterator_category;
+    typedef void value_type;
+    typedef void reference;
+    typedef void pointer;
+    typedef size_t difference_type;
+
+    OUStringBufferAppender(OUStringBuffer & i_rBuffer)
+        : m_rBuffer(&i_rBuffer) { }
+    Self & operator=(std::u16string_view i_rStr)
+    {
+        m_rBuffer->append( i_rStr );
+        return *this;
+    }
+    Self & operator*() { return *this; } // so operator= works
+    Self & operator++() { return *this; }
+
+private:
+    OUStringBuffer * m_rBuffer;
+};
+
+/** algorithm similar to std::copy, but inserts a separator between elements.
+ */
+template< typename ForwardIter, typename OutputIter, typename T >
+OutputIter intersperse(
+    ForwardIter start, ForwardIter end, OutputIter out, T const & separator)
+{
+    if (start != end) {
+        *out = *start;
+        ++start;
+        ++out;
+    }
+
+    while (start != end) {
+        *out = separator;
+        ++out;
+        *out = *start;
+        ++start;
+        ++out;
+    }
+
+    return out;
+}
+
+}
+
+#endif // INCLUDED_COMPHELPER_STL_TYPES_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/storagehelper.hxx b/include/comphelper/storagehelper.hxx
new file mode 100644
index 000000000..c6c47c1a5
--- /dev/null
+++ b/include/comphelper/storagehelper.hxx
@@ -0,0 +1,206 @@
+/* -*- 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_COMPHELPER_STORAGEHELPER_HXX
+#define INCLUDED_COMPHELPER_STORAGEHELPER_HXX
+
+#include <com/sun/star/uno/Sequence.h>
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/embed/ElementModes.hpp>
+#include <comphelper/comphelperdllapi.h>
+#include <memory>
+#include <string_view>
+
+inline constexpr OUStringLiteral PACKAGE_STORAGE_FORMAT_STRING = u"PackageFormat";
+inline constexpr OUStringLiteral ZIP_STORAGE_FORMAT_STRING = u"ZipFormat";
+inline constexpr OUStringLiteral OFOPXML_STORAGE_FORMAT_STRING = u"OFOPXMLFormat";
+
+inline constexpr OUStringLiteral PACKAGE_ENCRYPTIONDATA_SHA256UTF8 = u"PackageSHA256UTF8EncryptionKey";
+inline constexpr OUStringLiteral PACKAGE_ENCRYPTIONDATA_SHA1UTF8 = u"PackageSHA1UTF8EncryptionKey";
+inline constexpr OUStringLiteral PACKAGE_ENCRYPTIONDATA_SHA1MS1252  = u"PackageSHA1MS1252EncryptionKey";
+inline constexpr OUStringLiteral PACKAGE_ENCRYPTIONDATA_SHA1CORRECT  = u"PackageSHA1CorrectEncryptionKey";
+
+namespace com::sun::star {
+    namespace beans { struct NamedValue; }
+    namespace embed { class XStorage; }
+    namespace io {
+        class XInputStream;
+        class XOutputStream;
+        class XStream;
+    }
+    namespace lang { class XSingleServiceFactory; }
+    namespace uno { class XComponentContext; }
+}
+
+namespace comphelper {
+
+// Unfortunately - the impl.s of XStorage like to invalidate all
+// their sub streams and storages when you release references, so
+// it is necessary to keep references to all storages down the
+// path - this is 'beautiful' (TM). So we need this ugly hack:
+class COMPHELPER_DLLPUBLIC LifecycleProxy
+{
+private:
+    class Impl;
+public:
+    std::unique_ptr<Impl> m_xBadness;
+    LifecycleProxy();
+    ~LifecycleProxy();
+    // commit the storages: necessary for writes to streams to take effect!
+    void commitStorages();
+};
+
+class COMPHELPER_DLLPUBLIC OStorageHelper
+{
+public:
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::lang::XSingleServiceFactory >
+        GetStorageFactory(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::lang::XSingleServiceFactory >
+        GetFileSystemStorageFactory(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetTemporaryStorage(
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// this one will only return Storage
+    ///
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetStorageFromURL(
+            const OUString& aURL,
+            sal_Int32 nStorageMode,
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// this one will return either Storage or FileSystemStorage
+    ///
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetStorageFromURL2(
+            const OUString& aURL,
+            sal_Int32 nStorageMode,
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetStorageFromInputStream(
+            const css::uno::Reference < css::io::XInputStream >& xStream,
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetStorageFromStream(
+            const css::uno::Reference < css::io::XStream >& xStream,
+            sal_Int32 nStorageMode = css::embed::ElementModes::READWRITE,
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// @throws css::uno::Exception
+    static void CopyInputToOutput(
+            const css::uno::Reference< css::io::XInputStream >& xInput,
+            const css::uno::Reference< css::io::XOutputStream >& xOutput );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::io::XInputStream >
+        GetInputStreamFromURL(
+            const OUString& aURL,
+            const css::uno::Reference< css::uno::XComponentContext >& context );
+
+    /// @throws css::uno::Exception
+    static void SetCommonStorageEncryptionData(
+            const css::uno::Reference< css::embed::XStorage >& xStorage,
+            const css::uno::Sequence< css::beans::NamedValue >& aEncryptionData );
+
+    // the following method supports only storages of OOo formats
+    /// @throws css::uno::Exception
+    static sal_Int32 GetXStorageFormat(
+            const css::uno::Reference< css::embed::XStorage >& xStorage );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetStorageOfFormatFromURL(
+            const OUString& aFormat,
+            const OUString& aURL,
+            sal_Int32 nStorageMode,
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >() );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetStorageOfFormatFromInputStream(
+            const OUString& aFormat,
+            const css::uno::Reference < css::io::XInputStream >& xStream,
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >(),
+            bool bRepairStorage = false );
+
+    /// @throws css::uno::Exception
+    static css::uno::Reference< css::embed::XStorage >
+        GetStorageOfFormatFromStream(
+            const OUString& aFormat,
+            const css::uno::Reference < css::io::XStream >& xStream,
+            sal_Int32 nStorageMode = css::embed::ElementModes::READWRITE,
+            const css::uno::Reference< css::uno::XComponentContext >& rxContext
+                            = css::uno::Reference< css::uno::XComponentContext >(),
+            bool bRepairStorage = false );
+
+    static css::uno::Sequence< css::beans::NamedValue >
+        CreatePackageEncryptionData(
+            std::u16string_view aPassword );
+
+    static css::uno::Sequence< css::beans::NamedValue >
+        CreateGpgPackageEncryptionData();
+
+    static bool IsValidZipEntryFileName( std::u16string_view aName, bool bSlashAllowed );
+    static bool IsValidZipEntryFileName( const sal_Unicode *pChar, sal_Int32 nLength, bool bSlashAllowed );
+
+    static bool PathHasSegment( std::u16string_view aPath, std::u16string_view aSegment );
+
+    // Methods to allow easy use of hierarchical names inside storages
+
+    static css::uno::Reference< css::embed::XStorage > GetStorageAtPath(
+        const css::uno::Reference< css::embed::XStorage > &xStorage,
+        std::u16string_view aPath, sal_uInt32 nOpenMode, LifecycleProxy const &rNastiness );
+    static css::uno::Reference< css::io::XStream > GetStreamAtPath(
+        const css::uno::Reference< css::embed::XStorage > &xStorage,
+        std::u16string_view aPath, sal_uInt32 nOpenMode, LifecycleProxy const &rNastiness );
+    static css::uno::Reference< css::io::XStream > GetStreamAtPackageURL(
+        const css::uno::Reference< css::embed::XStorage > &xStorage,
+        const OUString& rURL, sal_uInt32 const nOpenMode,
+        LifecycleProxy const & rNastiness );
+
+    static OUString
+    GetODFVersionFromStorage(const css::uno::Reference<css::embed::XStorage>& xStorage);
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/streamsection.hxx b/include/comphelper/streamsection.hxx
new file mode 100644
index 000000000..fa1fe8ac9
--- /dev/null
+++ b/include/comphelper/streamsection.hxx
@@ -0,0 +1,79 @@
+/* -*- 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_COMPHELPER_STREAMSECTION_HXX
+#define INCLUDED_COMPHELPER_STREAMSECTION_HXX
+
+#include <config_options.h>
+#include <com/sun/star/uno/Reference.h>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::io
+{
+class XDataInputStream;
+}
+namespace com::sun::star::io
+{
+class XDataOutputStream;
+}
+namespace com::sun::star::io
+{
+class XMarkableStream;
+}
+
+namespace comphelper
+{
+/** implements handling for compatibly reading/writing data from/into an input/output stream.
+    data written in a block secured by this class should be readable by older versions which
+    use the same mechanism.
+*/
+
+class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OStreamSection
+{
+    css::uno::Reference<css::io::XMarkableStream> m_xMarkStream;
+    css::uno::Reference<css::io::XDataInputStream> m_xInStream;
+    css::uno::Reference<css::io::XDataOutputStream> m_xOutStream;
+
+    sal_Int32 m_nBlockStart;
+    sal_Int32 m_nBlockLen;
+
+public:
+    /** starts reading of a "skippable" section of data within the given input stream<BR>
+        @param      _rxInput    the stream to read from. Must support the
+                                css::io::XMarkableStream interface
+    */
+    OStreamSection(const css::uno::Reference<css::io::XDataInputStream>& _rxInput);
+
+    /** starts writing of a "skippable" section of data into the given output stream
+        @param      _rxOutput           the stream the stream to write to. Must support the
+                                        css::io::XMarkableStream interface
+    */
+    OStreamSection(const css::uno::Reference<css::io::XDataOutputStream>& _rxOutput);
+
+    /** dtor. <BR>If constructed for writing, the section "opened" by this object will be "closed".<BR>
+        If constructed for reading, any remaining bytes 'til the end of the section will be skipped.
+    */
+    ~OStreamSection();
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_STREAMSECTION_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/string.hxx b/include/comphelper/string.hxx
new file mode 100644
index 000000000..a722e2cc4
--- /dev/null
+++ b/include/comphelper/string.hxx
@@ -0,0 +1,386 @@
+/* -*- 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 .
+ */
+#pragma once
+
+#include <sal/config.h>
+
+#include <algorithm>
+#include <vector>
+#include <comphelper/comphelperdllapi.h>
+#include <sal/types.h>
+#include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <com/sun/star/uno/Sequence.h>
+#include <com/sun/star/uno/Reference.hxx>
+
+#include <com/sun/star/lang/Locale.hpp>
+
+namespace com::sun::star::i18n { class XBreakIterator; }
+namespace com::sun::star::i18n { class XCollator; }
+namespace com::sun::star::uno { class XComponentContext; }
+
+// OUString helper functions that are not widespread or mature enough to
+// go into the stable URE API:
+namespace comphelper::string {
+
+/** Removes all occurrences of a character from within the source string
+
+    @param rIn      The input OUStringBuffer
+    @param c        The character to be removed
+
+    @return         The resulting OUStringBuffer
+ */
+inline OUStringBuffer& remove(OUStringBuffer &rIn,
+    sal_Unicode c)
+{
+    sal_Int32 index = 0;
+    while (true)
+    {
+        if (index >= rIn.getLength())
+            break;
+        index = rIn.indexOf(c, index);
+        if (index == -1)
+            break;
+        rIn.remove(index, 1);
+    }
+    return rIn;
+}
+
+/** Strips occurrences of a character from the start of the source string
+
+    @param rIn      The input OString
+    @param c        The character to be stripped from the start
+
+    @return         The resulting OString
+ */
+COMPHELPER_DLLPUBLIC OString stripStart(const OString& rIn,
+    char c);
+COMPHELPER_DLLPUBLIC std::string_view stripStart(std::string_view rIn,
+    char c);
+
+/** Strips occurrences of a character from the start of the source string
+
+    @param rIn      The input OUString
+    @param c        The character to be stripped from the start
+
+    @return         The resulting OUString
+ */
+COMPHELPER_DLLPUBLIC OUString stripStart(const OUString& rIn,
+    sal_Unicode c);
+COMPHELPER_DLLPUBLIC std::u16string_view stripStart(std::u16string_view rIn,
+    sal_Unicode c);
+
+/** Strips occurrences of a character from the end of the source string
+
+    @param rIn      The input OString
+    @param c        The character to be stripped from the end
+
+    @return         The resulting OString
+ */
+COMPHELPER_DLLPUBLIC OString stripEnd(const OString& rIn,
+    char c);
+COMPHELPER_DLLPUBLIC std::string_view stripEnd(std::string_view rIn,
+    char c);
+
+/** Strips occurrences of a character from the end of the source string
+
+    @param rIn      The input OUString
+    @param c        The character to be stripped from the end
+
+    @return         The resulting OUString
+ */
+COMPHELPER_DLLPUBLIC OUString stripEnd(const OUString& rIn,
+    sal_Unicode c);
+COMPHELPER_DLLPUBLIC std::u16string_view stripEnd(std::u16string_view rIn,
+    sal_Unicode c);
+
+/** Strips occurrences of a character from the start and end of the source string
+
+    @param rIn      The input OString
+    @param c        The character to be stripped from the start and end
+
+    @return         The resulting OString
+ */
+COMPHELPER_DLLPUBLIC OString strip(const OString& rIn,
+    char c);
+COMPHELPER_DLLPUBLIC std::string_view strip(std::string_view rIn,
+    char c);
+
+/** Strips occurrences of a character from the start and end of the source string
+
+    @param rIn      The input OUString
+    @param c        The character to be stripped from the start and end
+
+    @return         The resulting OUString
+ */
+COMPHELPER_DLLPUBLIC OUString strip(const OUString& rIn,
+    sal_Unicode c);
+COMPHELPER_DLLPUBLIC std::u16string_view strip(std::u16string_view rIn,
+    sal_Unicode c);
+
+/** Returns number of tokens in an OUString
+
+  @param    rIn     the input OString
+  @param    cTok    the character which separate the tokens.
+  @return   the number of tokens
+*/
+COMPHELPER_DLLPUBLIC sal_Int32 getTokenCount(std::string_view rIn, char cTok);
+
+/** Returns number of tokens in an OUString
+
+  @param    rIn     the input OUString
+  @param    cTok    the character which separate the tokens.
+  @return   the number of tokens
+*/
+COMPHELPER_DLLPUBLIC sal_Int32 getTokenCount(std::u16string_view rIn, sal_Unicode cTok);
+
+/** Reverse an OUString's UTF-16 code units.
+
+  @param    rIn     the input OUString
+  @return   the reversed input
+*/
+COMPHELPER_DLLPUBLIC OUString reverseString(std::u16string_view rStr);
+
+/** Reverse an OString
+
+  @param    rIn     the input OString
+  @return   the reversed input
+*/
+COMPHELPER_DLLPUBLIC OString reverseString(std::string_view rStr);
+
+/** Reverse an OUString's Unicode code points.
+*/
+COMPHELPER_DLLPUBLIC OUString reverseCodePoints(OUString const & str);
+
+namespace detail
+{
+    template<typename B> B& truncateToLength(B& rBuffer, sal_Int32 nLen)
+    {
+        if (nLen < rBuffer.getLength())
+            rBuffer.setLength(nLen);
+        return rBuffer;
+    }
+}
+
+/** Truncate a buffer to a given length.
+
+    If the StringBuffer has more characters than nLength it will be truncated
+    on the right to nLength characters.
+
+    Has no effect if the StringBuffer is <= nLength
+
+    @param rBuf   StringBuffer to operate on
+    @param nLength   Length to truncate the buffer to
+
+    @return         rBuf;
+ */
+inline OUStringBuffer& truncateToLength(
+    OUStringBuffer& rBuffer, sal_Int32 nLength)
+{
+    return detail::truncateToLength(rBuffer, nLength);
+}
+
+namespace detail
+{
+    template<typename B, typename U> B& padToLength(B& rBuffer, sal_Int32 nLen, U cFill)
+    {
+        const sal_Int32 nPadLen = nLen - rBuffer.getLength();
+        if (nPadLen > 0)
+            std::fill_n(rBuffer.appendUninitialized(nPadLen), nPadLen, cFill);
+        return rBuffer;
+    }
+}
+
+/** Pad a buffer to a given length using a given char.
+
+    If the StringBuffer has less characters than nLength it will be expanded on
+    the right to nLength characters, with the expansion filled using cFill.
+
+    Has no effect if the StringBuffer is >= nLength
+
+    @param rBuf   StringBuffer to operate on
+    @param nLength   Length to pad the buffer to
+    @param cFill  character to fill expansion with
+
+    @return         rBuf;
+ */
+inline OStringBuffer& padToLength(
+    OStringBuffer& rBuffer, sal_Int32 nLength,
+    char cFill = '\0')
+{
+    return detail::padToLength(rBuffer, nLength, cFill);
+}
+
+inline OUStringBuffer& padToLength(
+    OUStringBuffer& rBuffer, sal_Int32 nLength,
+    sal_Unicode cFill = '\0')
+{
+    return detail::padToLength(rBuffer, nLength, cFill);
+}
+
+/** Similar to OUString::replaceAt, but for an OUStringBuffer.
+
+    Replace n = count characters
+    from position index in this string with newStr.
+ */
+COMPHELPER_DLLPUBLIC void replaceAt(OUStringBuffer& rIn, sal_Int32 index, sal_Int32 count, std::u16string_view newStr );
+
+/** Replace a token in a string
+    @param rIn       OUString in which the token is to be replaced
+    @param nToken    which nToken to replace
+    @param cTok      token delimiter
+    @param rNewToken replacement token
+
+    @return original string with token nToken replaced by rNewToken
+ */
+COMPHELPER_DLLPUBLIC OUString setToken(const OUString& rIn, sal_Int32 nToken, sal_Unicode cTok,
+    std::u16string_view rNewToken);
+
+/** Find any of a list of code units in the string.
+    @param rIn      OUString to search
+    @param pChars   0-terminated array of sal_Unicode code units to search for
+    @param nPos     start position
+
+    @return position of first occurrence of any of the elements of pChars
+            or -1 if none of the code units occur in the string
+ */
+COMPHELPER_DLLPUBLIC sal_Int32 indexOfAny(std::u16string_view rIn,
+        sal_Unicode const*const pChars, sal_Int32 const nPos);
+
+/** Remove any of a list of code units in the string.
+    @param rIn      OUString to search
+    @param pChars   0-terminated array of sal_Unicode code units to search for
+
+    @return OUString that has all of the pChars code units removed
+ */
+COMPHELPER_DLLPUBLIC OUString removeAny(std::u16string_view rIn,
+        sal_Unicode const*const pChars);
+
+/** Convert a sequence of strings to a single comma separated string.
+
+    Note that no escaping of commas or anything fancy is done.
+
+    @param i_rSeq   A list of strings to be concatenated.
+
+    @return         A single string containing the concatenation of the given
+                    list, interspersed with the string ", ".
+ */
+COMPHELPER_DLLPUBLIC OUString convertCommaSeparated(
+    css::uno::Sequence< OUString > const & i_rSeq);
+
+/// Return a string which is the concatenation of the strings in the sequence.
+COMPHELPER_DLLPUBLIC OString join(std::string_view rSeparator, const std::vector<OString>& rSequence);
+
+/** Convert a decimal string to a number.
+
+    The string must be base-10, no sign but can contain any
+    codepoint listed in the "Number, Decimal Digit" Unicode
+    category.
+
+    No verification is made about the validity of the string,
+    passing string not containing decimal digit code points
+    gives unspecified results
+
+    If your string is guaranteed to contain only ASCII digit
+    use OUString::toInt32 instead.
+
+    @param str  The string to convert containing only decimal
+                digit codepoints.
+
+    @return     The value of the string as an int32.
+ */
+COMPHELPER_DLLPUBLIC sal_uInt32 decimalStringToNumber(
+    OUString const & str );
+
+COMPHELPER_DLLPUBLIC std::vector<OUString>
+    split(std::u16string_view rString, const sal_Unicode cSeparator);
+
+/** Convert a single comma separated string to a sequence of strings.
+
+    Note that no escaping of commas or anything fancy is done.
+
+    @param i_rString    A string containing comma-separated words.
+
+    @return         A sequence of strings resulting from splitting the given
+                    string at ',' tokens and stripping whitespace.
+ */
+COMPHELPER_DLLPUBLIC css::uno::Sequence< OUString >
+    convertCommaSeparated( std::u16string_view i_rString );
+
+/**
+  Compares two strings using natural order.
+
+  For non digit characters, the comparison use the same algorithm as
+  rtl_str_compare. When a number is encountered during the comparison,
+  natural order is used. Thus, Heading 10 will be considered as greater
+  than Heading 2. Numerical comparison is done using decimal representation.
+
+  Beware that "MyString 001" and "MyString 1" will be considered as equal
+  since leading 0 are meaningless.
+
+  @param    str         the object to be compared.
+  @return   0 - if both strings are equal
+            < 0 - if this string is less than the string argument
+            > 0 - if this string is greater than the string argument
+*/
+COMPHELPER_DLLPUBLIC sal_Int32 compareNatural( const OUString &rLHS, const OUString &rRHS,
+    const css::uno::Reference< css::i18n::XCollator > &rCollator,
+    const css::uno::Reference< css::i18n::XBreakIterator > &rBI,
+    const css::lang::Locale &rLocale );
+
+class COMPHELPER_DLLPUBLIC NaturalStringSorter
+{
+private:
+    css::lang::Locale const                          m_aLocale;
+    css::uno::Reference< css::i18n::XCollator >      m_xCollator;
+    css::uno::Reference< css::i18n::XBreakIterator > m_xBI;
+public:
+    NaturalStringSorter(
+        const css::uno::Reference< css::uno::XComponentContext > &rContext,
+        css::lang::Locale aLocale);
+    sal_Int32 compare(const OUString &rLHS, const OUString &rRHS) const
+    {
+        return compareNatural(rLHS, rRHS, m_xCollator, m_xBI, m_aLocale);
+    }
+    const css::lang::Locale& getLocale() const { return m_aLocale; }
+};
+
+/** Determine if an OString contains solely ASCII numeric digits
+
+    @param rString  An OString
+
+    @return         false if string contains any characters outside
+                    the ASCII '0'-'9' range
+                    true otherwise, including for empty string
+ */
+COMPHELPER_DLLPUBLIC bool isdigitAsciiString(std::string_view rString);
+
+/** Determine if an OUString contains solely ASCII numeric digits
+
+    @param rString  An OUString
+
+    @return         false if string contains any characters outside
+                    the ASCII '0'-'9' range
+                    true otherwise, including for empty string
+ */
+COMPHELPER_DLLPUBLIC bool isdigitAsciiString(std::u16string_view rString);
+
+} // namespace comphelper::string
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/synchronousdispatch.hxx b/include/comphelper/synchronousdispatch.hxx
new file mode 100644
index 000000000..8503b2a43
--- /dev/null
+++ b/include/comphelper/synchronousdispatch.hxx
@@ -0,0 +1,64 @@
+/* -*- 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_COMPHELPER_SYNCHRONOUSDISPATCH_HXX
+#define INCLUDED_COMPHELPER_SYNCHRONOUSDISPATCH_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <com/sun/star/uno/Reference.h>
+#include <rtl/ustring.hxx>
+
+namespace com::sun::star {
+    namespace uno {
+        class XInterface; }
+    namespace lang {
+        class XComponent; }
+}
+
+namespace com::sun::star::beans { struct PropertyValue; }
+namespace com::sun::star::uno { template <class E> class Sequence; }
+
+
+namespace comphelper
+{
+
+
+    //= SynchronousDispatch
+
+    /** a helper class for working with the dispatch interface replacing
+        loadComponentFromURL
+    */
+    class SynchronousDispatch
+    {
+    public:
+        static COMPHELPER_DLLPUBLIC css::uno::Reference< css::lang::XComponent > dispatch(
+            const css::uno::Reference< css::uno::XInterface > &xStartPoint,
+            const OUString &sURL,
+            const OUString &sTarget,
+            const css::uno::Sequence< css::beans::PropertyValue > &lArguments );
+    };
+
+
+} // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_SYNCHRONOUSDISPATCH_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/syntaxhighlight.hxx b/include/comphelper/syntaxhighlight.hxx
new file mode 100644
index 000000000..c8bc100d3
--- /dev/null
+++ b/include/comphelper/syntaxhighlight.hxx
@@ -0,0 +1,84 @@
+/* -*- 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_COMPHELPER_SYNTAXHIGHLIGHT_HXX
+#define INCLUDED_COMPHELPER_SYNTAXHIGHLIGHT_HXX
+
+#include <rtl/ustring.hxx>
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <vector>
+#include <memory>
+
+enum class TokenType
+{
+    Unknown,
+    Identifier,
+    Whitespace,
+    Number,
+    String,
+    EOL,
+    Comment,
+    Error,
+    Operator,
+    Keywords,
+    Parameter,
+    LAST = Parameter
+};
+
+struct HighlightPortion {
+    sal_Int32 nBegin;
+    sal_Int32 nEnd;
+    TokenType tokenType;
+
+    HighlightPortion(
+        sal_Int32 theBegin, sal_Int32 theEnd, TokenType theTokenType):
+        nBegin(theBegin), nEnd(theEnd), tokenType(theTokenType)
+    {}
+};
+
+// Language mode of the Highlighter (possibly to be refined later with keyword
+// lists, C comment flags)
+enum class HighlighterLanguage
+{
+    Basic,
+    SQL
+};
+
+class COMPHELPER_DLLPUBLIC SyntaxHighlighter
+{
+    class Tokenizer;
+
+    std::unique_ptr<Tokenizer> m_tokenizer;
+
+    SyntaxHighlighter(const SyntaxHighlighter&) = delete;
+    SyntaxHighlighter& operator=(const SyntaxHighlighter&) = delete;
+public:
+    SyntaxHighlighter(HighlighterLanguage language);
+    ~SyntaxHighlighter();
+
+    void getHighlightPortions( std::u16string_view rLine,
+                               std::vector<HighlightPortion>& pPortions ) const;
+
+    HighlighterLanguage GetLanguage() const;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/threadpool.hxx b/include/comphelper/threadpool.hxx
new file mode 100644
index 000000000..84f9dc928
--- /dev/null
+++ b/include/comphelper/threadpool.hxx
@@ -0,0 +1,114 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_THREADPOOL_HXX
+#define INCLUDED_COMPHELPER_THREADPOOL_HXX
+
+#include <sal/config.h>
+#include <rtl/ref.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <mutex>
+#include <condition_variable>
+#include <cstddef>
+#include <vector>
+#include <memory>
+
+namespace comphelper
+{
+class ThreadTaskTag;
+
+class COMPHELPER_DLLPUBLIC ThreadTask
+{
+friend class ThreadPool;
+friend struct std::default_delete<ThreadTask>;
+    std::shared_ptr<ThreadTaskTag>  mpTag;
+
+    /// execute this task
+    void      exec();
+protected:
+    /// override to get your task performed by the pool
+    virtual void doWork() = 0;
+    /// once pushed ThreadTasks are destroyed by the pool
+    virtual   ~ThreadTask() {}
+public:
+    ThreadTask(std::shared_ptr<ThreadTaskTag> pTag);
+};
+
+/// A very basic thread-safe thread pool implementation
+class COMPHELPER_DLLPUBLIC ThreadPool final
+{
+public:
+    /// returns a pointer to a shared pool with optimal thread
+    /// count for the CPU
+    static      ThreadPool& getSharedOptimalPool();
+
+    static std::shared_ptr<ThreadTaskTag> createThreadTaskTag();
+
+    static bool isTaskTagDone(const std::shared_ptr<ThreadTaskTag>&);
+
+    /// returns a configurable max-concurrency
+    /// limit to avoid spawning an unnecessarily
+    /// large number of threads on high-core boxes.
+    /// MAX_CONCURRENCY env. var. controls the cap.
+    static      std::size_t getPreferredConcurrency();
+
+    ThreadPool( std::size_t nWorkers );
+    ~ThreadPool();
+
+    /// push a new task onto the work queue
+    void        pushTask( std::unique_ptr<ThreadTask> pTask);
+
+    /** Wait until all queued tasks associated with the tag are completed
+        @param  bJoin - if set call joinThreadsIfIdle() at the end
+    */
+    void        waitUntilDone(const std::shared_ptr<ThreadTaskTag>&, bool bJoin = true);
+
+    /// join all threads if there are no tasks presently.
+    void        joinThreadsIfIdle();
+
+    /// return true if there are no queued or worked-on tasks
+    bool        isIdle() const { return maTasks.empty() && mnBusyWorkers == 0; };
+
+    /// return the number of live worker threads
+    sal_Int32   getWorkerCount() const { return mnMaxWorkers; }
+
+    /// wait until all work is completed, then join all threads
+    void        shutdown();
+
+private:
+    ThreadPool(const ThreadPool&) = delete;
+    ThreadPool& operator=(const ThreadPool&) = delete;
+
+    class ThreadWorker;
+    friend class ThreadWorker;
+
+    /** Pop a work task
+        @param  bWait - if set wait until task present or termination
+        @return a new task to perform, or NULL if list empty or terminated
+    */
+    std::unique_ptr<ThreadTask> popWorkLocked( std::unique_lock< std::mutex > & rGuard, bool bWait );
+    void shutdownLocked(std::unique_lock<std::mutex>&);
+    void incBusyWorker();
+    void decBusyWorker();
+
+    /// signalled when all in-progress tasks are complete
+    std::mutex              maMutex;
+    std::condition_variable maTasksChanged;
+    bool                    mbTerminate;
+    std::size_t const       mnMaxWorkers;
+    std::size_t             mnBusyWorkers;
+    std::vector< std::unique_ptr<ThreadTask> >   maTasks;
+    std::vector< rtl::Reference< ThreadWorker > > maWorkers;
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_THREADPOOL_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/traceevent.hxx b/include/comphelper/traceevent.hxx
new file mode 100644
index 000000000..a0fe9cae1
--- /dev/null
+++ b/include/comphelper/traceevent.hxx
@@ -0,0 +1,222 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+*/
+
+#ifndef INCLUDED_COMPHELPER_TRACEEVENT_HXX
+#define INCLUDED_COMPHELPER_TRACEEVENT_HXX
+
+#include <sal/config.h>
+
+#include <atomic>
+#include <map>
+#include <memory>
+#include <utility>
+#include <vector>
+
+#include <osl/process.h>
+#include <osl/thread.h>
+#include <osl/time.h>
+#include <com/sun/star/uno/Sequence.h>
+#include <comphelper/comphelperdllapi.h>
+#include <rtl/ustrbuf.hxx>
+#include <rtl/ustring.hxx>
+
+// implementation of XToolkitExperimental profiling API
+
+namespace comphelper
+{
+class COMPHELPER_DLLPUBLIC TraceEvent
+{
+private:
+    static int getPid()
+    {
+        oslProcessInfo aProcessInfo;
+        aProcessInfo.Size = sizeof(oslProcessInfo);
+        if (osl_getProcessInfo(nullptr, osl_Process_IDENTIFIER, &aProcessInfo)
+            == osl_Process_E_None)
+            return aProcessInfo.Ident;
+        return -1;
+    }
+
+    static std::size_t s_nBufferSize;
+    static void (*s_pBufferFullCallback)();
+
+protected:
+    static std::atomic<bool> s_bRecording; // true during recording
+
+    static void addRecording(const OUString& sObject);
+
+    static long long getNow()
+    {
+        TimeValue systemTime;
+        osl_getSystemTime(&systemTime);
+        return static_cast<long long>(systemTime.Seconds) * 1000000 + systemTime.Nanosec / 1000;
+    }
+
+    static OUString createArgsString(const std::map<OUString, OUString>& args)
+    {
+        if (args.size() == 0)
+            return "";
+
+        OUStringBuffer sResult;
+        sResult.append(",\"args\":{");
+        bool first = true;
+        for (auto& i : args)
+        {
+            if (!first)
+                sResult.append(',');
+            sResult.append('"');
+            sResult.append(i.first);
+            sResult.append("\":\"");
+            sResult.append(i.second);
+            sResult.append('"');
+            first = false;
+        }
+        sResult.append('}');
+
+        return sResult.makeStringAndClear();
+    }
+
+    const int m_nPid;
+    const OUString m_sArgs;
+
+    TraceEvent(OUString sArgs)
+        : m_nPid(s_bRecording ? getPid() : 1)
+        , m_sArgs(std::move(sArgs))
+    {
+    }
+
+    TraceEvent(const std::map<OUString, OUString>& aArgs)
+        : TraceEvent(createArgsString(aArgs))
+    {
+    }
+
+public:
+    static void addInstantEvent(const char* sName, const std::map<OUString, OUString>& args
+                                                   = std::map<OUString, OUString>());
+
+    static void startRecording();
+    static void stopRecording();
+    static void setBufferSizeAndCallback(std::size_t bufferSize, void (*bufferFullCallback)());
+
+    static std::vector<OUString> getEventVectorAndClear();
+
+    static css::uno::Sequence<OUString> getRecordingAndClear();
+};
+
+class COMPHELPER_DLLPUBLIC NamedEvent : public TraceEvent
+{
+protected:
+    const char* m_sName;
+
+    NamedEvent(const char* sName, const OUString& sArgs)
+        : TraceEvent(sArgs)
+        , m_sName(sName ? sName : "(null)")
+    {
+    }
+
+    NamedEvent(const char* sName, const std::map<OUString, OUString>& aArgs)
+        : TraceEvent(aArgs)
+        , m_sName(sName ? sName : "(null)")
+    {
+    }
+};
+
+// An AsyncEvent generates an 'S' (start) event when constructed and a 'F' (finish) event when it
+// is destructed.
+
+// The Trace Event specification claims that these event types are deprecated and replaces by
+// nestable 'b' (begin) and 'e' (end) events, but Chrome does not seem to support those.
+
+// To generate a pair of 'S' and 'F' events, create an AsyncEvent object using the AsyncEvent(const
+// char* sName) constructor when you want the 'S' event to be generated, and destroy it when you
+// want the corresponding 'F' event to be generated.
+
+class COMPHELPER_DLLPUBLIC AsyncEvent : public NamedEvent,
+                                        public std::enable_shared_from_this<AsyncEvent>
+{
+    static int s_nIdCounter;
+    int m_nId;
+    bool m_bBeginRecorded;
+
+    AsyncEvent(const char* sName, int nId, const std::map<OUString, OUString>& args)
+        : NamedEvent(sName, args)
+        , m_nId(nId)
+        , m_bBeginRecorded(false)
+    {
+        if (!s_bRecording)
+            return;
+
+        long long nNow = getNow();
+
+        // Generate a "Start" (type S) event
+        TraceEvent::addRecording("{"
+                                 "\"name\":\""
+                                 + OUString(m_sName, strlen(m_sName), RTL_TEXTENCODING_UTF8)
+                                 + "\","
+                                   "\"ph\":\"S\""
+                                   ","
+                                   "\"id\":"
+                                 + OUString::number(m_nId) + m_sArgs
+                                 + ","
+                                   "\"ts\":"
+                                 + OUString::number(nNow)
+                                 + ","
+                                   "\"pid\":"
+                                 + OUString::number(m_nPid)
+                                 + ","
+                                   "\"tid\":"
+                                 + OUString::number(osl_getThreadIdentifier(nullptr)) + "},");
+        m_bBeginRecorded = true;
+    }
+
+    void generateEnd()
+    {
+        if (!m_bBeginRecorded)
+            return;
+
+        m_bBeginRecorded = false;
+
+        long long nNow = getNow();
+        // Generate a "Finish" (type F) event
+        TraceEvent::addRecording("{"
+                                 "\"name\":\""
+                                 + OUString(m_sName, strlen(m_sName), RTL_TEXTENCODING_UTF8)
+                                 + "\","
+                                   "\"ph\":\"F\""
+                                   ","
+                                   "\"id\":"
+                                 + OUString::number(m_nId) + m_sArgs
+                                 + ","
+                                   "\"ts\":"
+                                 + OUString::number(nNow)
+                                 + ","
+                                   "\"pid\":"
+                                 + OUString::number(m_nPid)
+                                 + ","
+                                   "\"tid\":"
+                                 + OUString::number(osl_getThreadIdentifier(nullptr)) + "},");
+    }
+
+public:
+    AsyncEvent(const char* sName,
+               const std::map<OUString, OUString>& args = std::map<OUString, OUString>())
+        : AsyncEvent(sName, s_nIdCounter++, args)
+    {
+    }
+
+    ~AsyncEvent() { generateEnd(); }
+
+    void finish() { generateEnd(); }
+};
+
+} // namespace comphelper
+
+#endif // INCLUDED_COMPHELPER_TRACEEVENT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/types.hxx b/include/comphelper/types.hxx
new file mode 100644
index 000000000..203bbbe02
--- /dev/null
+++ b/include/comphelper/types.hxx
@@ -0,0 +1,88 @@
+/* -*- 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_COMPHELPER_TYPES_HXX
+#define INCLUDED_COMPHELPER_TYPES_HXX
+
+#include <com/sun/star/uno/Reference.hxx>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <comphelper/comphelperdllapi.h>
+
+namespace com::sun::star::awt {
+    struct FontDescriptor;
+}
+
+namespace com::sun::star::uno { class Any; }
+namespace com::sun::star::uno { class XInterface; }
+
+
+namespace comphelper
+{
+    /// returns sal_True if objects of the types given are "compatible"
+    COMPHELPER_DLLPUBLIC bool isAssignableFrom(const css::uno::Type& _rAssignable, const css::uno::Type& _rFrom);
+
+    /** ask the given object for an XComponent interface and dispose on it
+    */
+    template <class TYPE>
+    void disposeComponent(css::uno::Reference<TYPE>& _rxComp)
+    {
+        css::uno::Reference<css::lang::XComponent> xComp(_rxComp, css::uno::UNO_QUERY);
+        if (xComp.is())
+        {
+            xComp->dispose();
+            _rxComp = nullptr;
+        }
+    }
+
+
+    /** get a css::awt::FontDescriptor that is fully initialized with
+        the XXX_DONTKNOW enum values (which isn't the case if you instantiate it
+        via the default constructor)
+    */
+    COMPHELPER_DLLPUBLIC css::awt::FontDescriptor    getDefaultFont();
+
+    /** examine a sequence for the com.sun.star.uno::Type of its elements.
+    */
+    COMPHELPER_DLLPUBLIC css::uno::Type getSequenceElementType(const css::uno::Type& _rSequenceType);
+
+
+//= replacement of the former UsrAny.getXXX methods
+
+    // may be used if you need the return value just as temporary, else it's may be too inefficient...
+
+    // no, we don't use templates here. This would lead to a lot of implicit uses of the conversion methods,
+    // which would be difficult to trace...
+
+    COMPHELPER_DLLPUBLIC sal_Int64      getINT64(const css::uno::Any& _rAny);
+    COMPHELPER_DLLPUBLIC sal_Int32      getINT32(const css::uno::Any& _rAny);
+    COMPHELPER_DLLPUBLIC sal_Int16      getINT16(const css::uno::Any& _rAny);
+    COMPHELPER_DLLPUBLIC double         getDouble(const css::uno::Any& _rAny);
+    COMPHELPER_DLLPUBLIC float          getFloat(const css::uno::Any& _rAny);
+    COMPHELPER_DLLPUBLIC OUString       getString(const css::uno::Any& _rAny);
+    COMPHELPER_DLLPUBLIC bool           getBOOL(const css::uno::Any& _rAny);
+
+    /// @throws css::lang::IllegalArgumentException
+    COMPHELPER_DLLPUBLIC sal_Int32      getEnumAsINT32(const css::uno::Any& _rAny);
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_TYPES_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/unique_disposing_ptr.hxx b/include/comphelper/unique_disposing_ptr.hxx
new file mode 100644
index 000000000..5994799fc
--- /dev/null
+++ b/include/comphelper/unique_disposing_ptr.hxx
@@ -0,0 +1,187 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_UNIQUE_DISPOSING_PTR_HXX
+#define INCLUDED_COMPHELPER_UNIQUE_DISPOSING_PTR_HXX
+
+#include <memory>
+#include <cppuhelper/implbase.hxx>
+
+#include <com/sun/star/lang/XComponent.hpp>
+#include <com/sun/star/frame/XDesktop.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+#include <o3tl/deleter.hxx>
+#include <utility>
+#include <vcl/svapp.hxx>
+
+namespace comphelper
+{
+//Similar to std::unique_ptr, except additionally releases the ptr on XComponent::disposing and/or XTerminateListener::notifyTermination if supported
+template<class T> class unique_disposing_ptr
+{
+private:
+    std::unique_ptr<T, o3tl::default_delete<T>> m_xItem;
+    css::uno::Reference< css::frame::XTerminateListener> m_xTerminateListener;
+
+    unique_disposing_ptr(const unique_disposing_ptr&) = delete;
+    unique_disposing_ptr& operator=(const unique_disposing_ptr&) = delete;
+public:
+    unique_disposing_ptr( const css::uno::Reference< css::lang::XComponent > &rComponent, T * p = nullptr, bool bComponent = false)
+        : m_xItem(p)
+    {
+        m_xTerminateListener = new TerminateListener(rComponent, *this, bComponent);
+    }
+
+    virtual void reset(T * p = nullptr)
+    {
+        m_xItem.reset(p);
+    }
+
+    T & operator*() const
+    {
+        return *m_xItem;
+    }
+
+    T * get() const
+    {
+        return m_xItem.get();
+    }
+
+    T * operator->() const
+    {
+        return m_xItem.get();
+    }
+
+    operator bool () const
+    {
+        return static_cast< bool >(m_xItem);
+    }
+
+    virtual ~unique_disposing_ptr() COVERITY_NOEXCEPT_FALSE
+    {
+        reset();
+    }
+private:
+    class TerminateListener final : public ::cppu::WeakImplHelper< css::frame::XTerminateListener,
+                                            css::lang::XServiceInfo>
+    {
+    private:
+        css::uno::Reference< css::lang::XComponent > m_xComponent;
+        unique_disposing_ptr<T>& m_rItem;
+        bool const mbComponentDLL;
+    public:
+        TerminateListener(css::uno::Reference< css::lang::XComponent > xComponent,
+            unique_disposing_ptr<T>& rItem, bool bComponentDLL) :
+                    m_xComponent(std::move(xComponent)),
+                    m_rItem(rItem),
+                    mbComponentDLL(bComponentDLL)
+        {
+            if (m_xComponent.is())
+            {
+                css::uno::Reference< css::frame::XDesktop> xDesktop(m_xComponent, css::uno::UNO_QUERY);
+                if (xDesktop.is())
+                    xDesktop->addTerminateListener(this);
+                else
+                    m_xComponent->addEventListener(this);
+            }
+        }
+
+        virtual ~TerminateListener() override
+        {
+            if ( m_xComponent.is() )
+            {
+                css::uno::Reference< css::frame::XDesktop> xDesktop(m_xComponent, css::uno::UNO_QUERY);
+                if (xDesktop.is())
+                    xDesktop->removeTerminateListener(this);
+                else
+                    m_xComponent->removeEventListener(this);
+            }
+        }
+
+        // XEventListener
+        virtual void SAL_CALL disposing( const css::lang::EventObject& rEvt ) override
+        {
+            bool shutDown = (rEvt.Source == m_xComponent);
+
+            if (shutDown && m_xComponent.is())
+            {
+                css::uno::Reference< css::frame::XDesktop> xDesktop(m_xComponent, css::uno::UNO_QUERY);
+                if (xDesktop.is())
+                    xDesktop->removeTerminateListener(this);
+                else
+                    m_xComponent->removeEventListener(this);
+                m_xComponent.clear();
+            }
+
+            if (shutDown)
+               m_rItem.reset();
+        }
+
+        // XTerminateListener
+        virtual void SAL_CALL queryTermination( const css::lang::EventObject& ) override
+        {
+        }
+
+        virtual void SAL_CALL notifyTermination( const css::lang::EventObject& rEvt ) override
+        {
+            disposing(rEvt);
+        }
+
+        virtual OUString SAL_CALL getImplementationName() override
+        {
+            if (mbComponentDLL)
+                return "com.sun.star.comp.ComponentDLLListener";
+            else
+                return "com.sun.star.comp.DisposingTerminateListener";
+        }
+
+        virtual sal_Bool SAL_CALL supportsService(const OUString& /*rName*/) override
+        {
+            return false;
+        }
+
+        virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override
+        {
+            return css::uno::Sequence<OUString>();
+        }
+   };
+};
+
+//Something like an OutputDevice requires the SolarMutex to be taken before use
+//for threadsafety. The user can ensure this, except in the case of its dtor
+//being called from reset due to a terminate on the XComponent being called
+//from an arbitrary thread
+template<class T> class unique_disposing_solar_mutex_reset_ptr
+    : public unique_disposing_ptr<T>
+{
+public:
+    unique_disposing_solar_mutex_reset_ptr( const css::uno::Reference< css::lang::XComponent > &rComponent, T * p = nullptr, bool bComponent = false)
+        : unique_disposing_ptr<T>(rComponent, p, bComponent)
+    {
+    }
+
+    virtual void reset(T * p = nullptr) override
+    {
+        SolarMutexGuard aGuard;
+        unique_disposing_ptr<T>::reset(p);
+    }
+
+    virtual ~unique_disposing_solar_mutex_reset_ptr() override
+    {
+        if (unique_disposing_ptr<T>::get() && comphelper::SolarMutex::get())
+            reset();
+    }
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/uno3.hxx b/include/comphelper/uno3.hxx
new file mode 100644
index 000000000..517398fd7
--- /dev/null
+++ b/include/comphelper/uno3.hxx
@@ -0,0 +1,169 @@
+/* -*- 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_COMPHELPER_UNO3_HXX
+#define INCLUDED_COMPHELPER_UNO3_HXX
+
+#include <com/sun/star/uno/XAggregation.hpp>
+#include <comphelper/sequence.hxx>
+
+
+namespace comphelper
+{
+    /** used for declaring UNO3-Defaults, i.e. acquire/release
+    */
+    #define DECLARE_UNO3_DEFAULTS(classname, baseclass) \
+        virtual void    SAL_CALL acquire() noexcept override { baseclass::acquire(); }    \
+        virtual void    SAL_CALL release() noexcept override { baseclass::release(); }
+
+    /** used for declaring UNO3-Defaults, i.e. acquire/release if you want to forward all queryInterfaces to the base class,
+        (e.g. if you override queryAggregation)
+    */
+    #define DECLARE_UNO3_AGG_DEFAULTS(classname, baseclass) \
+        virtual void            SAL_CALL acquire() noexcept override { baseclass::acquire(); } \
+        virtual void            SAL_CALL release() noexcept override { baseclass::release(); }    \
+        virtual css::uno::Any  SAL_CALL queryInterface(const css::uno::Type& _rType) override \
+            { return baseclass::queryInterface(_rType); }
+
+    /** Use this macro to forward XComponent methods to base class
+
+        When using the ::cppu::WeakComponentImplHelper base classes to
+        implement a UNO interface, a problem occurs when the interface
+        itself already derives from XComponent (like e.g. awt::XWindow
+        or awt::XControl): ::cppu::WeakComponentImplHelper is then
+        still abstract. Using this macro in the most derived class
+        definition provides overrides for the XComponent methods,
+        forwarding them to the given baseclass.
+
+        @param classname
+        Name of the class this macro is issued within
+
+        @param baseclass
+        Name of the baseclass that should have the XInterface methods
+        forwarded to - that's usually the WeakComponentImplHelperN base
+
+        @param implhelper
+        Name of the baseclass that should have the XComponent methods
+        forwarded to - in the case of the WeakComponentImplHelper,
+        that would be ::cppu::WeakComponentImplHelperBase
+    */
+    #define DECLARE_UNO3_XCOMPONENT_AGG_DEFAULTS(classname, baseclass, implhelper) \
+        virtual void SAL_CALL acquire() noexcept override { baseclass::acquire(); }   \
+        virtual void SAL_CALL release() noexcept override { baseclass::release(); }   \
+        virtual css::uno::Any  SAL_CALL queryInterface(const css::uno::Type& _rType) override \
+            { return baseclass::queryInterface(_rType); }                               \
+        virtual void SAL_CALL dispose() override \
+        {                                                                               \
+            implhelper::dispose();                                                      \
+        }                                                                               \
+        virtual void SAL_CALL addEventListener(                                         \
+            css::uno::Reference< css::lang::XEventListener > const & xListener ) override \
+        {                                                                               \
+            implhelper::addEventListener(xListener);                                        \
+        }                                                                               \
+        virtual void SAL_CALL removeEventListener(                                      \
+            css::uno::Reference< css::lang::XEventListener > const & xListener ) override \
+        {                                                                               \
+            implhelper::removeEventListener(xListener);                                 \
+        }
+
+    //= deriving from multiple XInterface-derived classes
+
+    //= forwarding/merging XInterface functionality
+
+    #define DECLARE_XINTERFACE( )   \
+        virtual css::uno::Any SAL_CALL queryInterface( const css::uno::Type& aType ) override; \
+        virtual void SAL_CALL acquire() noexcept override; \
+        virtual void SAL_CALL release() noexcept override;
+
+    #define IMPLEMENT_FORWARD_REFCOUNT( classname, refcountbase ) \
+        void SAL_CALL classname::acquire() noexcept { refcountbase::acquire(); } \
+        void SAL_CALL classname::release() noexcept { refcountbase::release(); }
+
+    #define IMPLEMENT_FORWARD_XINTERFACE2( classname, refcountbase, baseclass2 ) \
+        IMPLEMENT_FORWARD_REFCOUNT( classname, refcountbase ) \
+        css::uno::Any SAL_CALL classname::queryInterface( const css::uno::Type& _rType ) \
+        { \
+            css::uno::Any aReturn = refcountbase::queryInterface( _rType ); \
+            if ( !aReturn.hasValue() ) \
+                aReturn = baseclass2::queryInterface( _rType ); \
+            return aReturn; \
+        }
+
+    #define IMPLEMENT_FORWARD_XINTERFACE3( classname, refcountbase, baseclass2, baseclass3 ) \
+        IMPLEMENT_FORWARD_REFCOUNT( classname, refcountbase ) \
+        css::uno::Any SAL_CALL classname::queryInterface( const css::uno::Type& _rType ) \
+        { \
+            css::uno::Any aReturn = refcountbase::queryInterface( _rType ); \
+            if ( !aReturn.hasValue() ) \
+            { \
+                aReturn = baseclass2::queryInterface( _rType ); \
+                if ( !aReturn.hasValue() ) \
+                    aReturn = baseclass3::queryInterface( _rType ); \
+            } \
+            return aReturn; \
+        }
+
+
+    //= forwarding/merging XTypeProvider functionality
+
+    #define DECLARE_XTYPEPROVIDER( )    \
+        virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes(  ) override; \
+        virtual css::uno::Sequence< sal_Int8 > SAL_CALL getImplementationId(  ) override;
+
+    #define IMPLEMENT_GET_IMPLEMENTATION_ID( classname ) \
+        css::uno::Sequence< sal_Int8 > SAL_CALL classname::getImplementationId(  ) \
+        { \
+            return css::uno::Sequence<sal_Int8>(); \
+        }
+
+    #define IMPLEMENT_FORWARD_XTYPEPROVIDER2( classname, baseclass1, baseclass2 ) \
+        css::uno::Sequence< css::uno::Type > SAL_CALL classname::getTypes(  ) \
+        { \
+            return ::comphelper::concatSequences( \
+                baseclass1::getTypes(), \
+                baseclass2::getTypes() \
+            ); \
+        } \
+        \
+        IMPLEMENT_GET_IMPLEMENTATION_ID( classname )
+
+    /** ask for an iface of an aggregated object
+        usage:<br/>
+            Reference<XFoo> xFoo;<br/>
+            if (query_aggregation(xAggregatedObject, xFoo))<br/>
+                ...
+    */
+    template <class iface>
+    bool query_aggregation(const css::uno::Reference< css::uno::XAggregation >& _rxAggregate, css::uno::Reference<iface>& _rxOut)
+    {
+        _rxOut.clear();
+        if (_rxAggregate.is())
+        {
+            _rxAggregate->queryAggregation(cppu::UnoType<iface>::get())
+                >>= _rxOut;
+        }
+        return _rxOut.is();
+    }
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_UNO3_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/unwrapargs.hxx b/include/comphelper/unwrapargs.hxx
new file mode 100644
index 000000000..76eb8b838
--- /dev/null
+++ b/include/comphelper/unwrapargs.hxx
@@ -0,0 +1,122 @@
+/* -*- 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_COMPHELPER_UNWRAPARGS_HXX
+#define INCLUDED_COMPHELPER_UNWRAPARGS_HXX
+
+#include <sal/config.h>
+
+#include <optional>
+
+#include <com/sun/star/uno/Sequence.hxx>
+#include <com/sun/star/uno/XInterface.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <cppu/unotype.hxx>
+
+namespace comphelper {
+
+/// @internal
+namespace detail {
+    inline void unwrapArgsError(
+        const OUString& str, sal_Int32 nArg,
+        const css::uno::Reference< css::uno::XInterface >& xErrorContext =
+          css::uno::Reference< css::uno::XInterface >() )
+    {
+        throw css::lang::IllegalArgumentException(
+            str, xErrorContext, static_cast< sal_Int16 >( nArg ) );
+    }
+
+    template< typename T, typename... Args >
+    inline void unwrapArgsError( const OUString& str, sal_Int32 nArg, T&, Args&... args )
+    {
+        return unwrapArgsError( str, nArg, args... );
+    }
+
+    inline void unwrapArgs(
+        const css::uno::Sequence< css::uno::Any >&,
+        sal_Int32,
+        const css::uno::Reference< css::uno::XInterface >& )
+    {
+        return;
+    }
+
+    inline void unwrapArgs(
+        const css::uno::Sequence< css::uno::Any >&,
+        sal_Int32 )
+    {
+        return;
+    }
+
+    template< typename T, typename... Args >
+    inline void unwrapArgs(
+        const css::uno::Sequence< css::uno::Any >& seq,
+        sal_Int32 nArg, ::std::optional< T >& v, Args&... args );
+
+    template< typename T, typename... Args >
+    inline void unwrapArgs(
+        const css::uno::Sequence< css::uno::Any >& seq,
+        sal_Int32 nArg, T& v, Args&... args )
+    {
+        if( seq.getLength() <= nArg )
+        {
+            return unwrapArgsError( OUString( "No such argument available!"),
+                                     nArg, args... );
+        }
+        if( !fromAny( seq[nArg], &v ) )
+        {
+            OUString msg =
+                "Cannot extract ANY { " +
+                seq[nArg].getValueType().getTypeName() +
+                " } to " +
+                ::cppu::UnoType<T>::get().getTypeName() +
+                "!";
+            return unwrapArgsError( msg, nArg, args... );
+        }
+        return unwrapArgs( seq, ++nArg, args... );
+    }
+
+    template< typename T, typename... Args >
+    inline void unwrapArgs(
+        const css::uno::Sequence< css::uno::Any >& seq,
+        sal_Int32 nArg, ::std::optional< T >& v, Args&... args )
+    {
+        if( nArg < seq.getLength() )
+        {
+            T t;
+            unwrapArgs( seq, nArg, t, args... );
+            v = t;
+        } else {
+            unwrapArgs( seq, ++nArg, args... );
+        }
+    }
+}
+
+template< typename... Args >
+inline void unwrapArgs(
+    const css::uno::Sequence< css::uno::Any >& seq,
+    Args&... args )
+{
+    return detail::unwrapArgs( seq, 0, args... );
+}
+
+} // namespace comphelper
+
+#endif //  ! defined( INCLUDED_COMPHELPER_UNWRAPARGS_HXX)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/weak.hxx b/include/comphelper/weak.hxx
new file mode 100644
index 000000000..28a23445d
--- /dev/null
+++ b/include/comphelper/weak.hxx
@@ -0,0 +1,64 @@
+/* -*- 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_COMPHELPER_WEAK_HXX
+#define INCLUDED_COMPHELPER_WEAK_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <com/sun/star/lang/XTypeProvider.hpp>
+#include <cppuhelper/weak.hxx>
+
+namespace comphelper
+{
+/** Base class to implement a UNO object supporting types and weak references, i.e. the object can be held
+    weakly (by a css::uno::WeakReference).
+    This implementation copes with reference counting.  Upon last release(), the virtual dtor
+    is called.
+
+    In addition to the features from cppu::OWeakObject, derivations from this class can
+    also used as a base class for ::cppu::ImplInheritanceHelper?
+*/
+class COMPHELPER_DLLPUBLIC OWeakTypeObject : public ::cppu::OWeakObject, public css::lang::XTypeProvider
+{
+public:
+    OWeakTypeObject();
+    virtual ~OWeakTypeObject() override;
+
+    OWeakTypeObject(OWeakTypeObject const &) = default;
+    OWeakTypeObject(OWeakTypeObject &&) = default;
+    OWeakTypeObject & operator =(OWeakTypeObject const &) = default;
+    OWeakTypeObject & operator =(OWeakTypeObject &&) = default;
+
+    virtual css::uno::Any SAL_CALL queryInterface(const css::uno::Type & rType ) override;
+    virtual void SAL_CALL acquire() noexcept override
+    { ::cppu::OWeakObject::acquire(); }
+    virtual void SAL_CALL release() noexcept override
+    { ::cppu::OWeakObject::release(); }
+
+    virtual css::uno::Sequence< css::uno::Type > SAL_CALL getTypes(  ) override;
+    virtual css::uno::Sequence< ::sal_Int8 > SAL_CALL getImplementationId(  ) override;
+
+};
+
+}
+
+#endif
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/weakbag.hxx b/include/comphelper/weakbag.hxx
new file mode 100644
index 000000000..c52defab2
--- /dev/null
+++ b/include/comphelper/weakbag.hxx
@@ -0,0 +1,84 @@
+/* -*- 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_COMPHELPER_WEAKBAG_HXX
+#define INCLUDED_COMPHELPER_WEAKBAG_HXX
+
+#include <sal/config.h>
+
+#include <vector>
+#include <com/sun/star/uno/Reference.h>
+#include <cppuhelper/weakref.hxx>
+#include <osl/diagnose.h>
+
+namespace comphelper {
+
+/**
+   A bag of UNO weak references.
+*/
+template< typename T > class WeakBag {
+public:
+    /**
+       Add a new weak reference.
+
+       The implementation keeps the amount of memory consumed linear in the
+       number of living references added, not linear in the number of total
+       references added.
+
+       @param e
+       a non-null reference.
+    */
+    void add(css::uno::Reference< T > const & e) {
+        OSL_ASSERT(e.is());
+        for (auto i = m_list.begin(); i != m_list.end();) {
+            if (css::uno::Reference< T >(*i).is()) {
+                ++i;
+            } else {
+                i = m_list.erase(i);
+            }
+        }
+        m_list.push_back(css::uno::WeakReference< T >(e));
+    }
+
+    /**
+       Remove a living reference.
+
+       @return
+       a living reference, or null if there are none.
+    */
+    css::uno::Reference< T > remove() {
+        while (!m_list.empty()) {
+            css::uno::Reference< T > r(m_list.back());
+            m_list.pop_back();
+            if (r.is()) {
+                return r;
+            }
+        }
+        return css::uno::Reference< T >();
+    }
+
+private:
+    std::vector< css::uno::WeakReference< T > > m_list;
+};
+
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/weakeventlistener.hxx b/include/comphelper/weakeventlistener.hxx
new file mode 100644
index 000000000..d64f302d8
--- /dev/null
+++ b/include/comphelper/weakeventlistener.hxx
@@ -0,0 +1,183 @@
+/* -*- 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_COMPHELPER_WEAKEVENTLISTENER_HXX
+#define INCLUDED_COMPHELPER_WEAKEVENTLISTENER_HXX
+
+#include <config_options.h>
+#include <cppuhelper/compbase.hxx>
+#include <cppuhelper/basemutex.hxx>
+#include <cppuhelper/weakref.hxx>
+#include <comphelper/comphelperdllapi.h>
+#include <com/sun/star/lang/XEventListener.hpp>
+#include <com/sun/star/lang/XComponent.hpp>
+#include <utility>
+
+namespace com::sun::star::uno { class XWeak; }
+
+namespace comphelper
+{
+
+
+    //= OWeakListenerAdapterBase
+
+    /** (the base for) an adapter which allows to add as listener to a foreign component, without
+        being held hard.
+
+        <p>The idea is that this adapter is added as listener to a foreign component, which usually
+        holds it's listener hard. The adapter itself knows the real listener as weak reference,
+        thus not affecting its life time.</p>
+    */
+    class OWeakListenerAdapterBase : public cppu::BaseMutex
+    {
+    private:
+        css::uno::WeakReference< css::uno::XInterface >
+                m_aListener;
+        css::uno::Reference< css::uno::XInterface >
+                m_xBroadcaster;
+
+    protected:
+        css::uno::Reference< css::uno::XInterface >
+                getListener( ) const
+        {
+            return m_aListener.get();
+        }
+
+        const css::uno::Reference< css::uno::XInterface >&
+                getBroadcaster( ) const
+        {
+            return m_xBroadcaster;
+        }
+
+        void resetListener( )
+        {
+            m_aListener.clear();
+        }
+
+
+    protected:
+        OWeakListenerAdapterBase(
+            const css::uno::Reference< css::uno::XWeak >& _rxListener,
+            css::uno::Reference< css::uno::XInterface > _xBroadcaster
+        )
+            :m_aListener    (  _rxListener )
+            ,m_xBroadcaster (std::move( _xBroadcaster ))
+        {
+        }
+
+    protected:
+        virtual ~OWeakListenerAdapterBase();
+    };
+
+
+    //= OWeakListenerAdapter
+
+    template< class BROADCASTER, class LISTENER >
+    /** yet another base for weak listener adapters, this time with some type safety
+
+        <p>Note that derived classes need to overwrite all virtual methods of their interface
+        except XEventListener::disposing, and forward it to their master listener.</p>
+
+        <p>Additionally, derived classes need to add themself as listener to the broadcaster,
+        as this can't be done in a generic way</p>
+    */
+    class OWeakListenerAdapter
+            :public ::cppu::WeakComponentImplHelper< LISTENER >
+            ,public OWeakListenerAdapterBase
+    {
+    protected:
+        /** ctor
+            <p>Note that derived classes still need to add themself as listener to the broadcaster,
+            as this can't be done in a generic way</p>
+        */
+        OWeakListenerAdapter(
+            const css::uno::Reference< css::uno::XWeak >& _rxListener,
+            const css::uno::Reference< BROADCASTER >& _rxBroadcaster
+        );
+
+    protected:
+        css::uno::Reference< LISTENER > getListener( ) const
+        {
+            return  css::uno::Reference< LISTENER >( OWeakListenerAdapterBase::getListener(), css::uno::UNO_QUERY );
+        }
+
+        // XEventListener overridables
+        virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
+
+    protected:
+        // OComponentHelper overridables
+        // to be overridden, again - the derived class should revoke the listener from the broadcaster
+        virtual void SAL_CALL disposing( ) override = 0;
+    };
+
+
+    //= OWeakEventListenerAdapter
+
+    typedef OWeakListenerAdapter    <   css::lang::XComponent
+                                    ,   css::lang::XEventListener
+                                    >   OWeakEventListenerAdapter_Base;
+    /** the most simple listener adapter: for XEventListeners at XComponents
+    */
+    class UNLESS_MERGELIBS(COMPHELPER_DLLPUBLIC) OWeakEventListenerAdapter final : public OWeakEventListenerAdapter_Base
+    {
+    public:
+        OWeakEventListenerAdapter(
+            css::uno::Reference< css::uno::XWeak > const & _rxListener,
+            css::uno::Reference< css::lang::XComponent > const & _rxBroadcaster
+        );
+
+        // nothing to do except an own ctor - the forwarding of the "disposing" is already done
+        // in the base class
+
+    private:
+        using OWeakEventListenerAdapter_Base::disposing;
+        virtual void SAL_CALL disposing( ) override;
+    };
+
+
+    //= OWeakListenerAdapter
+
+
+    template< class BROADCASTER, class LISTENER >
+    OWeakListenerAdapter< BROADCASTER, LISTENER >::OWeakListenerAdapter(
+        const css::uno::Reference< css::uno::XWeak >& _rxListener,
+        const css::uno::Reference< BROADCASTER >& _rxBroadcaster
+    )
+        : ::cppu::WeakComponentImplHelper< LISTENER >( m_aMutex )
+        , OWeakListenerAdapterBase( _rxListener, _rxBroadcaster )
+    {
+    }
+
+
+    template< class BROADCASTER, class LISTENER >
+    void SAL_CALL OWeakListenerAdapter< BROADCASTER, LISTENER >::disposing( const css::lang::EventObject& _rSource )
+    {
+        css::uno::Reference< LISTENER > xListener( getListener() );
+        if ( xListener.is() )
+            xListener->disposing( _rSource );
+    }
+
+
+}   // namespace comphelper
+
+
+#endif // INCLUDED_COMPHELPER_WEAKEVENTLISTENER_HXX
+
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/windowsStart.hxx b/include/comphelper/windowsStart.hxx
new file mode 100644
index 000000000..a727733d9
--- /dev/null
+++ b/include/comphelper/windowsStart.hxx
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#ifndef INCLUDED_COMPHELPER_WINSTART_HXX
+#define INCLUDED_COMPHELPER_WINSTART_HXX
+
+#ifdef _WIN32
+#if !defined WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#endif
+
+/**
+ * Launch a child process with the specified arguments.
+ * @note argv[0] is ignored
+ */
+BOOL
+WinLaunchChild(const wchar_t *exePath, int argc,
+               wchar_t **argv, HANDLE userToken = nullptr,
+               HANDLE *hProcess = nullptr);
+
+wchar_t* MakeCommandLine(int argc, wchar_t **argv);
+
+#endif
diff --git a/include/comphelper/windowsdebugoutput.hxx b/include/comphelper/windowsdebugoutput.hxx
new file mode 100644
index 000000000..0315933c7
--- /dev/null
+++ b/include/comphelper/windowsdebugoutput.hxx
@@ -0,0 +1,796 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
+/*
+ * 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/.
+ */
+
+/* Debug output operators for Windows-specific types. For use in SAL_INFO(), SAL_WARN(), and
+ * friends. The exact format of the generated output is not guaranteed to be stable or contain
+ * complete information.
+ */
+
+#ifndef INCLUDED_COMPHELPER_WINDOWSDEBUGOUTPUT_HXX
+#define INCLUDED_COMPHELPER_WINDOWSDEBUGOUTPUT_HXX
+
+#include <codecvt>
+#include <iomanip>
+#include <ostream>
+#include <string>
+#include <vector>
+
+#ifdef LIBO_INTERNAL_ONLY
+#include <prewin.h>
+#include <postwin.h>
+#else
+#include <windows.h>
+#endif
+#include <initguid.h>
+
+namespace
+{
+DEFINE_GUID(IID_IdentityUnmarshal, 0x0000001B, 0x0000, 0x0000, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00,
+            0x00, 0x46);
+}
+
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const IID& rIid)
+{
+    LPOLESTR pRiid;
+    if (StringFromIID(rIid, &pRiid) != S_OK)
+        return stream << "?";
+
+    stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+        std::wstring(pRiid));
+
+    DWORD nSize;
+    if (RegGetValueW(HKEY_CLASSES_ROOT, std::wstring(L"CLSID\\").append(pRiid).data(), nullptr,
+                     RRF_RT_REG_SZ, nullptr, nullptr, &nSize)
+        == ERROR_SUCCESS)
+    {
+        std::vector<wchar_t> sValue(nSize / 2);
+        if (RegGetValueW(HKEY_CLASSES_ROOT, std::wstring(L"CLSID\\").append(pRiid).data(), nullptr,
+                         RRF_RT_REG_SZ, nullptr, sValue.data(), &nSize)
+            == ERROR_SUCCESS)
+        {
+            stream << "=\""
+                   << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                          std::wstring(sValue.data()))
+                   << "\"";
+        }
+    }
+    else if (RegGetValueW(HKEY_CLASSES_ROOT, std::wstring(L"Interface\\").append(pRiid).data(),
+                          nullptr, RRF_RT_REG_SZ, nullptr, nullptr, &nSize)
+             == ERROR_SUCCESS)
+    {
+        std::vector<wchar_t> sValue(nSize / 2);
+        if (RegGetValueW(HKEY_CLASSES_ROOT, std::wstring(L"Interface\\").append(pRiid).data(),
+                         nullptr, RRF_RT_REG_SZ, nullptr, sValue.data(), &nSize)
+            == ERROR_SUCCESS)
+        {
+            stream << "=\""
+                   << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                          std::wstring(sValue.data()))
+                   << "\"";
+        }
+    }
+    else
+    {
+        // Special case well-known interfaces that pop up a lot, but which don't have their name in
+        // the Registry.
+
+        if (IsEqualIID(rIid, IID_IMarshal))
+            stream << "=\"IMarshal\"";
+        else if (IsEqualIID(rIid, IID_IMarshal2))
+            stream << "=\"IMarshal2\"";
+        else if (IsEqualIID(rIid, IID_INoMarshal))
+            stream << "=\"INoMarshal\"";
+        else if (IsEqualIID(rIid, IID_IdentityUnmarshal))
+            stream << "=\"IdentityUnmarshal\"";
+        else if (IsEqualIID(rIid, IID_IFastRundown))
+            stream << "=\"IFastRundown\"";
+        else if (IsEqualIID(rIid, IID_IStdMarshalInfo))
+            stream << "=\"IStdMarshalInfo\"";
+        else if (IsEqualIID(rIid, IID_IAgileObject))
+            stream << "=\"IAgileObject\"";
+        else if (IsEqualIID(rIid, IID_IExternalConnection))
+            stream << "=\"IExternalConnection\"";
+        else if (IsEqualIID(rIid, IID_ICallFactory))
+            stream << "=\"ICallFactory\"";
+    }
+
+    CoTaskMemFree(pRiid);
+    return stream;
+}
+
+template <typename charT, typename traits>
+inline std::basic_ostream<charT, traits>& operator<<(std::basic_ostream<charT, traits>& stream,
+                                                     const VARIANT& rVariant)
+{
+    if (rVariant.vt & VT_VECTOR)
+        stream << "VECTOR:";
+    if (rVariant.vt & VT_ARRAY)
+        stream << "ARRAY:";
+    if (rVariant.vt & VT_BYREF)
+        stream << "BYREF:";
+
+    switch (rVariant.vt & ~(VT_VECTOR | VT_ARRAY | VT_BYREF))
+    {
+        case VT_EMPTY:
+            stream << "EMPTY";
+            break;
+        case VT_NULL:
+            stream << "NULL";
+            break;
+        case VT_I2:
+            stream << "I2";
+            break;
+        case VT_I4:
+            stream << "I4";
+            break;
+        case VT_R4:
+            stream << "R4";
+            break;
+        case VT_R8:
+            stream << "R8";
+            break;
+        case VT_CY:
+            stream << "CY";
+            break;
+        case VT_DATE:
+            stream << "DATE";
+            break;
+        case VT_BSTR:
+            stream << "BSTR";
+            break;
+        case VT_DISPATCH:
+            stream << "DISPATCH";
+            break;
+        case VT_ERROR:
+            stream << "ERROR";
+            break;
+        case VT_BOOL:
+            stream << "BOOL";
+            break;
+        case VT_VARIANT:
+            stream << "VARIANT";
+            break;
+        case VT_UNKNOWN:
+            stream << "UNKNOWN";
+            break;
+        case VT_DECIMAL:
+            stream << "DECIMAL";
+            break;
+        case VT_I1:
+            stream << "I1";
+            break;
+        case VT_UI1:
+            stream << "UI1";
+            break;
+        case VT_UI2:
+            stream << "UI2";
+            break;
+        case VT_UI4:
+            stream << "UI4";
+            break;
+        case VT_I8:
+            stream << "I8";
+            break;
+        case VT_UI8:
+            stream << "UI8";
+            break;
+        case VT_INT:
+            stream << "INT";
+            break;
+        case VT_UINT:
+            stream << "UINT";
+            break;
+        case VT_VOID:
+            stream << "VOID";
+            break;
+        case VT_HRESULT:
+            stream << "HRESULT";
+            break;
+        case VT_PTR:
+            stream << "PTR";
+            break;
+        case VT_SAFEARRAY:
+            stream << "SAFEARRAY";
+            break;
+        case VT_CARRAY:
+            stream << "CARRAY";
+            break;
+        case VT_USERDEFINED:
+            stream << "USERDEFINED";
+            break;
+        case VT_LPSTR:
+            stream << "LPSTR";
+            break;
+        case VT_LPWSTR:
+            stream << "LPWSTR";
+            break;
+        case VT_RECORD:
+            stream << "RECORD";
+            break;
+        case VT_INT_PTR:
+            stream << "INT_PTR";
+            break;
+        case VT_UINT_PTR:
+            stream << "UINT_PTR";
+            break;
+        case VT_FILETIME:
+            stream << "FILETIME";
+            break;
+        case VT_BLOB:
+            stream << "BLOB";
+            break;
+        case VT_STREAM:
+            stream << "STREAM";
+            break;
+        case VT_STORAGE:
+            stream << "STORAGE";
+            break;
+        case VT_STREAMED_OBJECT:
+            stream << "STREAMED_OBJECT";
+            break;
+        case VT_STORED_OBJECT:
+            stream << "STORED_OBJECT";
+            break;
+        case VT_BLOB_OBJECT:
+            stream << "BLOB_OBJECT";
+            break;
+        case VT_CF:
+            stream << "CF";
+            break;
+        case VT_CLSID:
+            stream << "CLSID";
+            break;
+        case VT_VERSIONED_STREAM:
+            stream << "VERSIONED_STREAM";
+            break;
+        case VT_BSTR_BLOB:
+            stream << "BSTR_BLOB";
+            break;
+        default:
+            stream << rVariant.vt;
+            break;
+    }
+    if (rVariant.vt == VT_EMPTY || rVariant.vt == VT_NULL || rVariant.vt == VT_VOID)
+        return stream;
+    stream << ":";
+
+    std::ios_base::fmtflags flags;
+    std::streamsize width;
+    charT fill;
+
+    if (rVariant.vt & VT_BYREF)
+    {
+        stream << rVariant.byref << ":";
+        if (rVariant.byref == nullptr)
+            return stream;
+        if ((rVariant.vt & VT_TYPEMASK) == VT_VOID || (rVariant.vt & VT_TYPEMASK) == VT_USERDEFINED)
+            return stream;
+        stream << ":";
+        switch (rVariant.vt & VT_TYPEMASK)
+        {
+            case VT_I2:
+                stream << *static_cast<short*>(rVariant.byref);
+                break;
+            case VT_I4:
+                stream << *static_cast<int*>(rVariant.byref);
+                break;
+            case VT_R4:
+                stream << *static_cast<float*>(rVariant.byref);
+                break;
+            case VT_R8:
+                stream << *static_cast<double*>(rVariant.byref);
+                break;
+            case VT_CY:
+                stream << static_cast<CY*>(rVariant.byref)->int64;
+                break;
+            case VT_DATE:
+                stream << *static_cast<double*>(rVariant.byref);
+                break; // FIXME
+            case VT_BSTR:
+                stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                    *static_cast<OLECHAR**>(rVariant.byref));
+                break;
+            case VT_DISPATCH:
+                stream << rVariant.byref;
+                break;
+            case VT_ERROR:
+            case VT_HRESULT:
+                flags = stream.flags();
+                stream << std::hex << *static_cast<int*>(rVariant.byref);
+                stream.setf(flags);
+                break;
+            case VT_BOOL:
+                stream << (*static_cast<VARIANT_BOOL*>(rVariant.byref) ? "YES" : "NO");
+                break;
+            case VT_VARIANT:
+                stream << *static_cast<VARIANT*>(rVariant.byref);
+                break;
+            case VT_UNKNOWN:
+                stream << *static_cast<IUnknown**>(rVariant.byref);
+                break;
+            case VT_DECIMAL:
+                flags = stream.flags();
+                width = stream.width();
+                fill = stream.fill();
+                stream << std::hex << std::setw(8) << std::setfill('0')
+                       << static_cast<DECIMAL*>(rVariant.byref)->Hi32;
+                stream << std::setw(16) << static_cast<DECIMAL*>(rVariant.byref)->Lo64;
+                stream.setf(flags);
+                stream << std::setw(width) << std::setfill(fill);
+                break;
+            case VT_I1:
+                stream << static_cast<int>(*static_cast<char*>(rVariant.byref));
+                break;
+            case VT_UI1:
+                stream << static_cast<unsigned int>(*static_cast<unsigned char*>(rVariant.byref));
+                break;
+            case VT_UI2:
+                stream << *static_cast<unsigned short*>(rVariant.byref);
+                break;
+            case VT_UI4:
+                stream << *static_cast<unsigned int*>(rVariant.byref);
+                break;
+            case VT_I8:
+                stream << *static_cast<long long*>(rVariant.byref);
+                break;
+            case VT_UI8:
+                stream << *static_cast<unsigned long long*>(rVariant.byref);
+                break;
+            case VT_INT:
+                stream << *static_cast<int*>(rVariant.byref);
+                break;
+            case VT_UINT:
+                stream << *static_cast<unsigned int*>(rVariant.byref);
+                break;
+            case VT_INT_PTR:
+                stream << *static_cast<intptr_t*>(rVariant.byref);
+                break;
+            case VT_UINT_PTR:
+                stream << *static_cast<uintptr_t*>(rVariant.byref);
+                break;
+            case VT_PTR:
+            case VT_CARRAY:
+                stream << *static_cast<void**>(rVariant.byref);
+                break;
+            case VT_SAFEARRAY:
+                break; // FIXME
+            case VT_LPSTR:
+                stream << *static_cast<char**>(rVariant.byref);
+                break;
+            case VT_LPWSTR:
+                stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                    std::wstring(*static_cast<wchar_t**>(rVariant.byref)));
+                break;
+            case VT_FILETIME:
+                break; // FIXME
+            case VT_BLOB:
+                break; // FIXME
+            case VT_STREAM:
+                break; // FIXME
+            case VT_STORAGE:
+                break; // FIXME
+            case VT_STREAMED_OBJECT:
+                break; // FIXME
+            case VT_STORED_OBJECT:
+                break; // FIXME
+            case VT_BLOB_OBJECT:
+                break; // FIXME
+            case VT_CF:
+                break; // FIXME
+            case VT_CLSID:
+                stream << *static_cast<IID*>(rVariant.byref);
+                break;
+            case VT_VERSIONED_STREAM:
+                break; // FIXME
+            case VT_BSTR_BLOB:
+                break; // FIXME
+            default:
+                stream << "?(" << (rVariant.vt & VT_TYPEMASK) << ")";
+                break;
+        }
+        return stream;
+    }
+
+    switch (rVariant.vt & VT_TYPEMASK)
+    {
+        case VT_I2:
+            stream << rVariant.iVal;
+            break;
+        case VT_I4:
+            stream << rVariant.lVal;
+            break;
+        case VT_R4:
+            stream << rVariant.fltVal;
+            break;
+        case VT_R8:
+            stream << rVariant.dblVal;
+            break;
+        case VT_CY:
+            stream << rVariant.cyVal.int64;
+            break;
+        case VT_DATE:
+            stream << static_cast<double>(rVariant.date);
+            break; // FIXME
+        case VT_BSTR:
+            if (rVariant.bstrVal == nullptr)
+                stream << "(null)";
+            else
+                stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                    rVariant.bstrVal);
+            break;
+        case VT_DISPATCH:
+            stream << rVariant.pdispVal;
+            break;
+        case VT_ERROR:
+        case VT_HRESULT:
+            flags = stream.flags();
+            stream << std::hex << rVariant.lVal;
+            stream.setf(flags);
+            break;
+        case VT_BOOL:
+            stream << (rVariant.boolVal ? "YES" : "NO");
+            break;
+        case VT_UNKNOWN:
+            stream << rVariant.punkVal;
+            break;
+        case VT_DECIMAL:
+            flags = stream.flags();
+            width = stream.width();
+            fill = stream.fill();
+            stream << std::hex << std::setw(8) << std::setfill('0') << rVariant.decVal.Hi32;
+            stream << std::setw(16) << rVariant.decVal.Lo64;
+            stream.setf(flags);
+            stream << std::setw(width) << std::setfill(fill);
+            break;
+        case VT_I1:
+            stream << static_cast<int>(rVariant.bVal);
+            break;
+        case VT_UI1:
+            stream << static_cast<unsigned int>(rVariant.bVal);
+            break;
+        case VT_UI2:
+            stream << static_cast<unsigned short>(rVariant.iVal);
+            break;
+        case VT_UI4:
+            stream << static_cast<unsigned int>(rVariant.lVal);
+            break;
+        case VT_I8:
+            stream << rVariant.llVal;
+            break;
+        case VT_UI8:
+            stream << static_cast<unsigned long long>(rVariant.llVal);
+            break;
+        case VT_INT:
+            stream << rVariant.lVal;
+            break;
+        case VT_UINT:
+            stream << static_cast<unsigned int>(rVariant.lVal);
+            break;
+        case VT_INT_PTR:
+            stream << reinterpret_cast<intptr_t>(rVariant.plVal);
+            break;
+        case VT_UINT_PTR:
+            stream << reinterpret_cast<uintptr_t>(rVariant.plVal);
+            break;
+        case VT_PTR:
+        case VT_CARRAY:
+            stream << rVariant.byref;
+            break;
+        case VT_SAFEARRAY:
+            break; // FIXME
+        case VT_LPSTR:
+            stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                rVariant.bstrVal);
+            break;
+        case VT_LPWSTR:
+            stream << std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t>().to_bytes(
+                std::wstring(static_cast<wchar_t*>(rVariant.byref)));
+            break;
+        case VT_FILETIME:
+            break; // FIXME
+        case VT_BLOB:
+            break; // FIXME
+        case VT_STREAM:
+            break; // FIXME
+        case VT_STORAGE:
+            break; // FIXME
+        case VT_STREAMED_OBJECT:
+            break; // FIXME
+        case VT_STORED_OBJECT:
+            break; // FIXME
+        case VT_BLOB_OBJECT:
+            break; // FIXME
+        case VT_CF:
+            break; // FIXME
+        case VT_VERSIONED_STREAM:
+            break; // FIXME
+        case VT_BSTR_BLOB:
+            break; // FIXME
+        default:
+            stream << "?(" << (rVariant.vt & VT_TYPEMASK) << ")";
+            break;
+    }
+    return stream;
+}
+
+inline std::string DMPAPER_to_string(int dmpaper)
+{
+    switch (dmpaper)
+    {
+        case DMPAPER_LETTER:
+            return "LETTER";
+        case DMPAPER_LETTERSMALL:
+            return "LETTERSMALL";
+        case DMPAPER_TABLOID:
+            return "TABLOID";
+        case DMPAPER_LEDGER:
+            return "LEDGER";
+        case DMPAPER_LEGAL:
+            return "LEGAL";
+        case DMPAPER_STATEMENT:
+            return "STATEMENT";
+        case DMPAPER_EXECUTIVE:
+            return "EXECUTIVE";
+        case DMPAPER_A3:
+            return "A3";
+        case DMPAPER_A4:
+            return "A4";
+        case DMPAPER_A4SMALL:
+            return "A4SMALL";
+        case DMPAPER_A5:
+            return "A5";
+        case DMPAPER_B4:
+            return "B4";
+        case DMPAPER_B5:
+            return "B5";
+        case DMPAPER_FOLIO:
+            return "FOLIO";
+        case DMPAPER_QUARTO:
+            return "QUARTO";
+        case DMPAPER_10X14:
+            return "10X14";
+        case DMPAPER_11X17:
+            return "11X17";
+        case DMPAPER_NOTE:
+            return "NOTE";
+        case DMPAPER_ENV_9:
+            return "ENV_9";
+        case DMPAPER_ENV_10:
+            return "ENV_10";
+        case DMPAPER_ENV_11:
+            return "ENV_11";
+        case DMPAPER_ENV_12:
+            return "ENV_12";
+        case DMPAPER_ENV_14:
+            return "ENV_14";
+        case DMPAPER_CSHEET:
+            return "CSHEET";
+        case DMPAPER_DSHEET:
+            return "DSHEET";
+        case DMPAPER_ESHEET:
+            return "ESHEET";
+        case DMPAPER_ENV_DL:
+            return "ENV_DL";
+        case DMPAPER_ENV_C5:
+            return "ENV_C5";
+        case DMPAPER_ENV_C3:
+            return "ENV_C3";
+        case DMPAPER_ENV_C4:
+            return "ENV_C4";
+        case DMPAPER_ENV_C6:
+            return "ENV_C6";
+        case DMPAPER_ENV_C65:
+            return "ENV_C65";
+        case DMPAPER_ENV_B4:
+            return "ENV_B4";
+        case DMPAPER_ENV_B5:
+            return "ENV_B5";
+        case DMPAPER_ENV_B6:
+            return "ENV_B6";
+        case DMPAPER_ENV_ITALY:
+            return "ENV_ITALY";
+        case DMPAPER_ENV_MONARCH:
+            return "ENV_MONARCH";
+        case DMPAPER_ENV_PERSONAL:
+            return "ENV_PERSONAL";
+        case DMPAPER_FANFOLD_US:
+            return "FANFOLD_US";
+        case DMPAPER_FANFOLD_STD_GERMAN:
+            return "FANFOLD_STD_GERMAN";
+        case DMPAPER_FANFOLD_LGL_GERMAN:
+            return "FANFOLD_LGL_GERMAN";
+        case DMPAPER_ISO_B4:
+            return "ISO_B4";
+        case DMPAPER_JAPANESE_POSTCARD:
+            return "JAPANESE_POSTCARD";
+        case DMPAPER_9X11:
+            return "9X11";
+        case DMPAPER_10X11:
+            return "10X11";
+        case DMPAPER_15X11:
+            return "15X11";
+        case DMPAPER_ENV_INVITE:
+            return "ENV_INVITE";
+        case DMPAPER_RESERVED_48:
+            return "RESERVED_48";
+        case DMPAPER_RESERVED_49:
+            return "RESERVED_49";
+        case DMPAPER_LETTER_EXTRA:
+            return "LETTER_EXTRA";
+        case DMPAPER_LEGAL_EXTRA:
+            return "LEGAL_EXTRA";
+        case DMPAPER_TABLOID_EXTRA:
+            return "TABLOID_EXTRA";
+        case DMPAPER_A4_EXTRA:
+            return "A4_EXTRA";
+        case DMPAPER_LETTER_TRANSVERSE:
+            return "LETTER_TRANSVERSE";
+        case DMPAPER_A4_TRANSVERSE:
+            return "A4_TRANSVERSE";
+        case DMPAPER_LETTER_EXTRA_TRANSVERSE:
+            return "LETTER_EXTRA_TRANSVERSE";
+        case DMPAPER_A_PLUS:
+            return "A_PLUS";
+        case DMPAPER_B_PLUS:
+            return "B_PLUS";
+        case DMPAPER_LETTER_PLUS:
+            return "LETTER_PLUS";
+        case DMPAPER_A4_PLUS:
+            return "A4_PLUS";
+        case DMPAPER_A5_TRANSVERSE:
+            return "A5_TRANSVERSE";
+        case DMPAPER_B5_TRANSVERSE:
+            return "B5_TRANSVERSE";
+        case DMPAPER_A3_EXTRA:
+            return "A3_EXTRA";
+        case DMPAPER_A5_EXTRA:
+            return "A5_EXTRA";
+        case DMPAPER_B5_EXTRA:
+            return "B5_EXTRA";
+        case DMPAPER_A2:
+            return "A2";
+        case DMPAPER_A3_TRANSVERSE:
+            return "A3_TRANSVERSE";
+        case DMPAPER_A3_EXTRA_TRANSVERSE:
+            return "A3_EXTRA_TRANSVERSE";
+        case DMPAPER_DBL_JAPANESE_POSTCARD:
+            return "DBL_JAPANESE_POSTCARD";
+        case DMPAPER_A6:
+            return "A6";
+        case DMPAPER_JENV_KAKU2:
+            return "JENV_KAKU2";
+        case DMPAPER_JENV_KAKU3:
+            return "JENV_KAKU3";
+        case DMPAPER_JENV_CHOU3:
+            return "JENV_CHOU3";
+        case DMPAPER_JENV_CHOU4:
+            return "JENV_CHOU4";
+        case DMPAPER_LETTER_ROTATED:
+            return "LETTER_ROTATED";
+        case DMPAPER_A3_ROTATED:
+            return "A3_ROTATED";
+        case DMPAPER_A4_ROTATED:
+            return "A4_ROTATED";
+        case DMPAPER_A5_ROTATED:
+            return "A5_ROTATED";
+        case DMPAPER_B4_JIS_ROTATED:
+            return "B4_JIS_ROTATED";
+        case DMPAPER_B5_JIS_ROTATED:
+            return "B5_JIS_ROTATED";
+        case DMPAPER_JAPANESE_POSTCARD_ROTATED:
+            return "JAPANESE_POSTCARD_ROTATED";
+        case DMPAPER_DBL_JAPANESE_POSTCARD_ROTATED:
+            return "DBL_JAPANESE_POSTCARD_ROTATED";
+        case DMPAPER_A6_ROTATED:
+            return "A6_ROTATED";
+        case DMPAPER_JENV_KAKU2_ROTATED:
+            return "JENV_KAKU2_ROTATED";
+        case DMPAPER_JENV_KAKU3_ROTATED:
+            return "JENV_KAKU3_ROTATED";
+        case DMPAPER_JENV_CHOU3_ROTATED:
+            return "JENV_CHOU3_ROTATED";
+        case DMPAPER_JENV_CHOU4_ROTATED:
+            return "JENV_CHOU4_ROTATED";
+        case DMPAPER_B6_JIS:
+            return "B6_JIS";
+        case DMPAPER_B6_JIS_ROTATED:
+            return "B6_JIS_ROTATED";
+        case DMPAPER_12X11:
+            return "12X11";
+        case DMPAPER_JENV_YOU4:
+            return "JENV_YOU4";
+        case DMPAPER_JENV_YOU4_ROTATED:
+            return "JENV_YOU4_ROTATED";
+        case DMPAPER_P16K:
+            return "P16K";
+        case DMPAPER_P32K:
+            return "P32K";
+        case DMPAPER_P32KBIG:
+            return "P32KBIG";
+        case DMPAPER_PENV_1:
+            return "PENV_1";
+        case DMPAPER_PENV_2:
+            return "PENV_2";
+        case DMPAPER_PENV_3:
+            return "PENV_3";
+        case DMPAPER_PENV_4:
+            return "PENV_4";
+        case DMPAPER_PENV_5:
+            return "PENV_5";
+        case DMPAPER_PENV_6:
+            return "PENV_6";
+        case DMPAPER_PENV_7:
+            return "PENV_7";
+        case DMPAPER_PENV_8:
+            return "PENV_8";
+        case DMPAPER_PENV_9:
+            return "PENV_9";
+        case DMPAPER_PENV_10:
+            return "PENV_10";
+        case DMPAPER_P16K_ROTATED:
+            return "P16K_ROTATED";
+        case DMPAPER_P32K_ROTATED:
+            return "P32K_ROTATED";
+        case DMPAPER_P32KBIG_ROTATED:
+            return "P32KBIG_ROTATED";
+        case DMPAPER_PENV_1_ROTATED:
+            return "PENV_1_ROTATED";
+        case DMPAPER_PENV_2_ROTATED:
+            return "PENV_2_ROTATED";
+        case DMPAPER_PENV_3_ROTATED:
+            return "PENV_3_ROTATED";
+        case DMPAPER_PENV_4_ROTATED:
+            return "PENV_4_ROTATED";
+        case DMPAPER_PENV_5_ROTATED:
+            return "PENV_5_ROTATED";
+        case DMPAPER_PENV_6_ROTATED:
+            return "PENV_6_ROTATED";
+        case DMPAPER_PENV_7_ROTATED:
+            return "PENV_7_ROTATED";
+        case DMPAPER_PENV_8_ROTATED:
+            return "PENV_8_ROTATED";
+        case DMPAPER_PENV_9_ROTATED:
+            return "PENV_9_ROTATED";
+        case DMPAPER_PENV_10_ROTATED:
+            return "PENV_10_ROTATED";
+        default:
+            return "?" + std::to_string(dmpaper);
+    }
+}
+
+inline std::string DC_PAPERSIZE_array_to_string(POINT* pPaperSizes, DWORD nCount)
+{
+    std::string result;
+
+    for (DWORD i = 0; i < nCount; i++)
+    {
+        if (i > 0)
+            result += ", ";
+
+        result += std::to_string(std::lround(pPaperSizes[i].x / 10.0)) + "x"
+                  + std::to_string(std::lround(pPaperSizes[i].y / 10.0));
+
+#if 0
+        // WIP. Printer::GetPaperName() should really be inline in <i18nutil/paper.hxx> or
+        // something, so that it can be used anywhere. We can't depend on vcl in this file as we
+        // might be included in modules that precede vcl.
+        PaperInfo paperInfo(pPaperSizes[i].x * 10, pPaperSizes[i].y * 10);
+        paperInfo.doSloppyFit(true);
+        if (paperInfo.getPaper() != PAPER_USER)
+            result += "(" + std::string(Printer::GetPaperName(paperInfo.getPaper()).toUtf8().getStr()) + ")";
+#endif
+    }
+    return result;
+}
+
+#endif // INCLUDED_COMPHELPER_WINDOWSDEBUGOUTPUT_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/windowserrorstring.hxx b/include/comphelper/windowserrorstring.hxx
new file mode 100644
index 000000000..1b50f1ead
--- /dev/null
+++ b/include/comphelper/windowserrorstring.hxx
@@ -0,0 +1,68 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_WINDOWSERRORSTRING_HXX
+#define INCLUDED_COMPHELPER_WINDOWSERRORSTRING_HXX
+
+#include <prewin.h>
+#include <postwin.h>
+#include <rtl/ustring.hxx>
+#include <o3tl/char16_t2wchar_t.hxx>
+
+namespace {
+
+inline OUString WindowsErrorString(DWORD nErrorCode)
+{
+    LPWSTR pMsgBuf;
+
+    if (FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+                       nullptr,
+                       nErrorCode,
+                       MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+                       reinterpret_cast<LPWSTR>(&pMsgBuf),
+                       0,
+                       nullptr) == 0)
+        return OUString::number(nErrorCode, 16);
+
+    OUString result(o3tl::toU(pMsgBuf));
+    result.endsWith("\r\n", &result);
+
+    HeapFree(GetProcessHeap(), 0, pMsgBuf);
+
+    return result;
+}
+
+inline OUString WindowsErrorStringFromHRESULT(HRESULT hr)
+{
+    // See https://blogs.msdn.microsoft.com/oldnewthing/20061103-07/?p=29133
+    // Also https://social.msdn.microsoft.com/Forums/vstudio/en-US/c33d9a4a-1077-4efd-99e8-0c222743d2f8
+    // (which refers to https://msdn.microsoft.com/en-us/library/aa382475)
+    // explains why can't we just reinterpret_cast HRESULT to DWORD Win32 error:
+    // we might actually have a Win32 error code converted using HRESULT_FROM_WIN32 macro
+
+    DWORD nErrorCode = DWORD(hr);
+    if (HRESULT(hr & 0xFFFF0000) == MAKE_HRESULT(SEVERITY_ERROR, FACILITY_WIN32, 0) || hr == S_OK)
+    {
+        nErrorCode = HRESULT_CODE(hr);
+        // https://msdn.microsoft.com/en-us/library/ms679360 mentions that the codes might have
+        // high word bits set (e.g., bit 29 could be set if error comes from a 3rd-party library).
+        // So try to restore the original error code to avoid wrong error messages
+        DWORD nLastError = GetLastError();
+        if ((nLastError & 0xFFFF) == nErrorCode)
+            nErrorCode = nLastError;
+    }
+
+    return WindowsErrorString(nErrorCode);
+}
+
+} // anonymous namespace
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/xmlsechelper.hxx b/include/comphelper/xmlsechelper.hxx
new file mode 100644
index 000000000..9a245877f
--- /dev/null
+++ b/include/comphelper/xmlsechelper.hxx
@@ -0,0 +1,46 @@
+/* -*- 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_COMPHELPER_XMLSECHELPER_HXX
+#define INCLUDED_COMPHELPER_XMLSECHELPER_HXX
+
+#include <comphelper/comphelperdllapi.h>
+
+#include <com/sun/star/security/CertificateKind.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+
+#include <vector>
+
+namespace comphelper::xmlsec
+{
+COMPHELPER_DLLPUBLIC OUString GetCertificateKind(const css::security::CertificateKind& rKind);
+
+COMPHELPER_DLLPUBLIC std::vector<std::pair<OUString, OUString>>
+parseDN(std::u16string_view rRawString);
+COMPHELPER_DLLPUBLIC std::pair<OUString, OUString>
+GetDNForCertDetailsView(std::u16string_view rRawString);
+COMPHELPER_DLLPUBLIC OUString GetContentPart(const OUString& _rRawString,
+                                             const css::security::CertificateKind& rKind);
+
+COMPHELPER_DLLPUBLIC OUString GetHexString(const css::uno::Sequence<sal_Int8>& _rSeq,
+                                           const char* _pSep, sal_uInt16 _nLineBreak = 0xFFFF);
+}
+
+#endif
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/comphelper/xmltools.hxx b/include/comphelper/xmltools.hxx
new file mode 100644
index 000000000..9ef64b17d
--- /dev/null
+++ b/include/comphelper/xmltools.hxx
@@ -0,0 +1,24 @@
+/* -*- 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/.
+ */
+
+#ifndef INCLUDED_COMPHELPER_XMLTOOLS_HXX
+#define INCLUDED_COMPHELPER_XMLTOOLS_HXX
+
+#include <rtl/string.hxx>
+#include <comphelper/comphelperdllapi.h>
+
+namespace comphelper::xml
+{
+        COMPHELPER_DLLPUBLIC OString makeXMLChaff();
+        COMPHELPER_DLLPUBLIC OString generateGUIDString();
+}
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */