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diff --git a/linguistic/source/spelldsp.hxx b/linguistic/source/spelldsp.hxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_LINGUISTIC_SOURCE_SPELLDSP_HXX
+#define INCLUDED_LINGUISTIC_SOURCE_SPELLDSP_HXX
+
+#include "defs.hxx"
+#include <linguistic/misc.hxx>
+#include <iprcache.hxx>
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/beans/PropertyValues.hpp>
+#include <com/sun/star/linguistic2/XSpellChecker1.hpp>
+#include <com/sun/star/linguistic2/XSpellChecker.hpp>
+#include <com/sun/star/linguistic2/XSearchableDictionaryList.hpp>
+
+#include <map>
+#include <memory>
+#include <unotools/charclass.hxx>
+
+class LngSvcMgr;
+
+
+class SpellCheckerDispatcher :
+    public cppu::WeakImplHelper
+    <
+        css::linguistic2::XSpellChecker1,
+        css::linguistic2::XSpellChecker
+    >,
+    public LinguDispatcher
+{
+    typedef std::shared_ptr< LangSvcEntries_Spell >               LangSvcEntries_Spell_Ptr_t;
+    typedef std::map< LanguageType, LangSvcEntries_Spell_Ptr_t >    SpellSvcByLangMap_t;
+    SpellSvcByLangMap_t     m_aSvcMap;
+
+    css::uno::Reference< css::linguistic2::XLinguProperties >           m_xPropSet;
+    css::uno::Reference< css::linguistic2::XSearchableDictionaryList >  m_xDicList;
+
+    LngSvcMgr                       &m_rMgr;
+    mutable std::unique_ptr<linguistic::SpellCache> m_pCache; // Spell Cache (holds known words)
+    std::unique_ptr<CharClass>       m_pCharClass;
+
+    SpellCheckerDispatcher(const SpellCheckerDispatcher &) = delete;
+    SpellCheckerDispatcher & operator = (const SpellCheckerDispatcher &) = delete;
+
+    inline linguistic::SpellCache &  GetCache() const;
+
+    inline const css::uno::Reference< css::linguistic2::XLinguProperties > &
+            GetPropSet();
+    inline const css::uno::Reference< css::linguistic2::XSearchableDictionaryList > &
+            GetDicList();
+
+    /// @throws css::uno::RuntimeException
+    /// @throws css::lang::IllegalArgumentException
+    bool    isValid_Impl(const OUString& aWord, LanguageType nLanguage,
+                    const css::beans::PropertyValues& aProperties);
+
+    /// @throws css::uno::RuntimeException
+    /// @throws css::lang::IllegalArgumentException
+    css::uno::Reference<
+        css::linguistic2::XSpellAlternatives >
+            spell_Impl(const OUString& aWord, LanguageType nLanguage,
+                    const css::beans::PropertyValues& aProperties);
+
+public:
+    explicit SpellCheckerDispatcher( LngSvcMgr &rLngSvcMgr );
+    virtual ~SpellCheckerDispatcher() override;
+
+    // XSupportedLocales (for XSpellChecker)
+    virtual css::uno::Sequence< css::lang::Locale > SAL_CALL getLocales() override;
+    virtual sal_Bool SAL_CALL hasLocale( const css::lang::Locale& aLocale ) override;
+
+    // XSpellChecker
+    virtual sal_Bool SAL_CALL isValid( const OUString& aWord, const css::lang::Locale& aLocale, const css::uno::Sequence< ::css::beans::PropertyValue >& aProperties ) override;
+    virtual css::uno::Reference< css::linguistic2::XSpellAlternatives > SAL_CALL spell( const OUString& aWord, const css::lang::Locale& aLocale, const css::uno::Sequence< ::css::beans::PropertyValue >& aProperties ) override;
+
+    // XSupportedLanguages
+    virtual css::uno::Sequence< ::sal_Int16 > SAL_CALL getLanguages(  ) override;
+    virtual sal_Bool SAL_CALL hasLanguage( ::sal_Int16 nLanguage ) override;
+
+    // XSpellChecker1
+    virtual sal_Bool SAL_CALL isValid( const OUString& aWord, ::sal_Int16 nLanguage, const css::uno::Sequence< css::beans::PropertyValue >& aProperties ) override;
+    virtual css::uno::Reference< css::linguistic2::XSpellAlternatives > SAL_CALL spell( const OUString& aWord, ::sal_Int16 nLanguage, const css::uno::Sequence< css::beans::PropertyValue >& aProperties ) override;
+
+    // LinguDispatcher
+    virtual void SetServiceList( const css::lang::Locale &rLocale, const css::uno::Sequence< OUString > &rSvcImplNames ) override;
+    virtual css::uno::Sequence< OUString > GetServiceList( const css::lang::Locale &rLocale ) const override;
+
+    void    FlushSpellCache();
+
+private:
+    void setCharClass(const LanguageTag& rLanguageTag);
+    static OUString makeLowerCase(const OUString&, CharClass const *);
+
+};
+
+inline linguistic::SpellCache & SpellCheckerDispatcher::GetCache() const
+{
+    if (!m_pCache)
+        m_pCache.reset(new linguistic::SpellCache());
+    return *m_pCache;
+}
+
+
+inline const css::uno::Reference< css::linguistic2::XLinguProperties > &
+        SpellCheckerDispatcher::GetPropSet()
+{
+    if (!m_xPropSet.is())
+        m_xPropSet = linguistic::GetLinguProperties();
+    return m_xPropSet;
+}
+
+
+inline const css::uno::Reference< css::linguistic2::XSearchableDictionaryList > &
+        SpellCheckerDispatcher::GetDicList()
+{
+    if (!m_xDicList.is())
+        m_xDicList = linguistic::GetDictionaryList();
+    return m_xDicList;
+}
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */