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+/** 
+ * @file llsearchhistory.h
+ * @brief Search history container definition
+ *
+ * $LicenseInfo:firstyear=2009&license=viewergpl$
+ * 
+ * Copyright (c) 2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLSEARCHHISTORY_H
+#define LL_LLSEARCHHISTORY_H
+
+#include "llsingleton.h"
+#include "llui.h"
+
+/**
+ * Search history container able to save and load history from file.
+ * History is stored in chronological order, most recent at the beginning.
+ */
+class LLSearchHistory : public LLSingleton<LLSearchHistory>, private LLDestroyClass<LLSearchHistory>
+{
+	friend class LLDestroyClass<LLSearchHistory>;
+public:
+
+	// Forward declaration
+	class LLSearchHistoryItem;
+
+	// Search history container
+	typedef std::list<LLSearchHistoryItem>	search_history_list_t;
+
+	/**
+	 * Saves search history to file
+	 */
+	bool save();
+
+	/**
+	 * loads search history from file
+	 */
+	bool load();
+
+	/**
+	 * Returns search history list
+	 */
+	search_history_list_t& getSearchHistoryList() { return mSearchHistory; }
+
+	/**
+	 * Deletes all search history queries from list.
+	 */
+	void clearHistory() { mSearchHistory.clear(); }
+
+	/**
+	 * Adds unique entry to front of search history list, case insensitive
+	 * If entry is already in list, it will be deleted and added to front.
+	 */
+	void addEntry(const std::string& search_text);
+
+	LLSearchHistory();
+
+	/**
+	 * Class for storing data about single search request.
+	 */
+	class LLSearchHistoryItem
+	{
+	public:
+
+		LLSearchHistoryItem()
+		{}
+
+		LLSearchHistoryItem(const std::string& query)
+			: search_query(query)
+		{}
+
+		LLSearchHistoryItem(const LLSD& item)
+		{
+			if(item.has(SEARCH_QUERY))
+				search_query = item[SEARCH_QUERY].asString();
+		}
+
+		std::string search_query;
+
+		/**
+		 * Allows std::list sorting
+		 */
+		bool operator < (const LLSearchHistory::LLSearchHistoryItem& right);
+
+		/**
+		 * Allows std::list sorting
+		 */
+		bool operator > (const LLSearchHistory::LLSearchHistoryItem& right);
+
+		bool operator==(const LLSearchHistoryItem& right);
+
+		bool operator==(const std::string& right);
+
+		/**
+		 * Serializes search history item to LLSD
+		 */
+		LLSD toLLSD() const;
+	};
+
+protected:
+
+	/**
+	 * Returns path to search history file.
+	 */
+	std::string getHistoryFilePath();
+
+	static std::string SEARCH_HISTORY_FILE_NAME;
+	static std::string SEARCH_QUERY;
+
+private:
+
+	// Implementation of LLDestroyClass<LLSearchHistory>
+	static void destroyClass()
+	{
+		LLSearchHistory::getInstance()->save();
+	}
+
+	search_history_list_t mSearchHistory;
+};
+
+class LLSearchComboBox;
+
+#endif //LL_LLSEARCHHISTORY_H