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diff --git a/indra/llui/llchatentry.h b/indra/llui/llchatentry.h
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+/**
+ * @file llchatentry.h
+ * @author Paul Guslisty
+ * @brief Text editor widget which is used for user input
+ *
+ * Features:
+ *			Optional line history so previous entries can be recalled by CTRL UP/DOWN
+ *			Optional auto-resize behavior on input chat field
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2012, 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 LLCHATENTRY_H_
+#define LLCHATENTRY_H_
+
+#include "lltexteditor.h"
+
+class LLChatEntry : public LLTextEditor
+{
+public:
+
+	struct Params : public LLInitParam::Block<Params, LLTextEditor::Params>
+	{
+		Optional<bool>		has_history,
+							is_expandable;
+
+		Optional<int>		expand_lines_count;
+
+		Params();
+	};
+
+	virtual ~LLChatEntry();
+
+protected:
+
+	friend class LLUICtrlFactory;
+	LLChatEntry(const Params& p);
+    /*virtual*/ void    beforeValueChange();
+    /*virtual*/ void    onValueChange(S32 start, S32 end);
+    /*virtual*/ bool    useLabel();
+
+public:
+
+	virtual void	draw();
+	virtual	void	onCommit();
+    /*virtual*/ void	onFocusReceived();
+    /*virtual*/ void	onFocusLost();
+
+	void enableSingleLineMode(bool single_line_mode);
+	boost::signals2::connection setTextExpandedCallback(const commit_signal_t::slot_type& cb);
+
+private:
+
+	/**
+	 * Implements auto-resize behavior.
+	 * When user's typing reaches the right edge of the chat field
+	 * the chat field expands vertically by one line. The bottom of
+	 * the chat field remains bottom-justified. The chat field does
+	 * not expand beyond mExpandLinesCount.
+	 */
+	void	expandText();
+
+	/**
+	 * Implements line history so previous entries can be recalled by CTRL UP/DOWN
+	 */
+	void	updateHistory();
+
+	BOOL	handleSpecialKey(const KEY key, const MASK mask);
+
+
+	// Fired when text height expanded to mExpandLinesCount
+	commit_signal_t*			mTextExpandedSignal;
+
+	// line history support:
+	typedef std::vector<std::string>	line_history_t;
+	line_history_t::iterator			mCurrentHistoryLine;	// currently browsed history line
+	line_history_t						mLineHistory;			// line history storage
+	bool								mHasHistory;			// flag for enabled/disabled line history
+	bool								mIsExpandable;
+	bool								mSingleLineMode;
+
+	S32									mExpandLinesCount;
+	S32									mPrevLinesCount;
+	S32									mPrevExpandedLineCount;
+};
+
+#endif /* LLCHATENTRY_H_ */