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diff --git a/indra/llui/llspellcheck.h b/indra/llui/llspellcheck.h
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+++ b/indra/llui/llspellcheck.h
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+/** 
+ * @file llspellcheck.h
+ * @brief Spell checking functionality
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LLSPELLCHECK_H
+#define LLSPELLCHECK_H
+
+#include "llsingleton.h"
+#include "llui.h"
+#include <boost/signals2.hpp>
+
+class Hunspell;
+
+class LLSpellChecker : public LLSingleton<LLSpellChecker>, public LLInitClass<LLSpellChecker>
+{
+	friend class LLSingleton<LLSpellChecker>;
+	friend class LLInitClass<LLSpellChecker>;
+protected:
+	LLSpellChecker();
+	~LLSpellChecker();
+
+public:
+	void addToCustomDictionary(const std::string& word);
+	void addToIgnoreList(const std::string& word);
+	bool checkSpelling(const std::string& word) const;
+	S32  getSuggestions(const std::string& word, std::vector<std::string>& suggestions) const;
+protected:
+	void addToDictFile(const std::string& dict_path, const std::string& word);
+	void initHunspell(const std::string& dict_name);
+
+public:
+	typedef std::list<std::string> dict_list_t;
+
+	const std::string&	getActiveDictionary() const { return mDictName; }
+	const dict_list_t&	getSecondaryDictionaries() const { return mDictSecondary; }
+	void				setSecondaryDictionaries(dict_list_t dict_list);
+
+	static const std::string getDictionaryAppPath();
+	static const std::string getDictionaryUserPath();
+	static const LLSD		 getDictionaryData(const std::string& dict_name);
+	static const LLSD&		 getDictionaryMap() { return sDictMap; }
+	static bool				 getUseSpellCheck();
+	static void				 refreshDictionaryMap();
+	static void				 setUseSpellCheck(const std::string& dict_name);
+
+	typedef boost::signals2::signal<void()> settings_change_signal_t;
+	static boost::signals2::connection setSettingsChangeCallback(const settings_change_signal_t::slot_type& cb);
+protected:
+	static void initClass();
+
+protected:
+	Hunspell*	mHunspell;
+	std::string	mDictName;
+	std::string	mDictFile;
+	dict_list_t	mDictSecondary;
+	std::vector<std::string> mIgnoreList;
+
+	static LLSD						sDictMap;
+	static settings_change_signal_t	sSettingsChangeSignal;
+};
+
+#endif // LLSPELLCHECK_H