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diff --git a/indra/llui/llemojidictionary.h b/indra/llui/llemojidictionary.h
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+++ b/indra/llui/llemojidictionary.h
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+/**
+* @file llemojidictionary.h
+* @brief Header file for LLEmojiDictionary
+*
+* $LicenseInfo:firstyear=2014&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2014, Linden Research, Inc.
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation;
+* version 2.1 of the License only.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*
+* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+* $/LicenseInfo$
+*/
+
+#pragma once
+
+#include "lldictionary.h"
+#include "llinitdestroyclass.h"
+#include "llsingleton.h"
+
+// ============================================================================
+// LLEmojiDescriptor class
+//
+
+struct LLEmojiDescriptor
+{
+    llwchar Character;
+    std::string Category;
+    std::list<std::string> ShortCodes;
+    std::string getShortCodes() const;
+};
+
+// ============================================================================
+// LLEmojiGroup class
+//
+
+struct LLEmojiGroup
+{
+    llwchar Character;
+    std::list<std::string> Categories;
+};
+
+// ============================================================================
+// LLEmojiDictionary class
+//
+
+class LLEmojiDictionary : public LLParamSingleton<LLEmojiDictionary>, public LLInitClass<LLEmojiDictionary>
+{
+    LLSINGLETON(LLEmojiDictionary);
+    ~LLEmojiDictionary() override {};
+
+public:
+    typedef std::map<std::string, std::string> cat2cat_map_t;
+    typedef std::map<std::string, const LLEmojiGroup*> cat2group_map_t;
+    typedef std::map<llwchar, const LLEmojiDescriptor*> emoji2descr_map_t;
+    typedef std::map<std::string, const LLEmojiDescriptor*> code2descr_map_t;
+    typedef std::map<std::string, std::vector<const LLEmojiDescriptor*>> cat2descrs_map_t;
+
+    static void initClass();
+    LLWString findMatchingEmojis(const std::string& needle) const;
+    const LLEmojiDescriptor* getDescriptorFromEmoji(llwchar emoji) const;
+    const LLEmojiDescriptor* getDescriptorFromShortCode(const std::string& short_code) const;
+    std::string getNameFromEmoji(llwchar ch) const;
+    bool isEmoji(llwchar ch) const;
+
+    const std::vector<LLEmojiGroup>& getGroups() const { return mGroups; }
+    const emoji2descr_map_t& getEmoji2Descr() const { return mEmoji2Descr; }
+    const cat2descrs_map_t& getCategory2Descrs() const { return mCategory2Descrs; }
+    const code2descr_map_t& getShortCode2Descr() const { return mShortCode2Descr; }
+
+private:
+    void loadTranslations();
+    void loadGroups();
+    void loadEmojis();
+
+    static llwchar loadIcon(const LLSD& sd);
+    static std::list<std::string> loadCategories(const LLSD& sd);
+    static std::list<std::string> loadShortCodes(const LLSD& sd);
+    void translateCategories(std::list<std::string>& categories);
+
+private:
+    std::vector<LLEmojiGroup> mGroups;
+    std::list<LLEmojiDescriptor> mEmojis;
+    std::list<std::string> mSkipCategories;
+
+    cat2cat_map_t mTranslations;
+    cat2group_map_t mCategory2Group;
+    emoji2descr_map_t mEmoji2Descr;
+    cat2descrs_map_t mCategory2Descrs;
+    code2descr_map_t mShortCode2Descr;
+};
+
+// ============================================================================