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diff --git a/indra/llwindow/llkeyboard.h b/indra/llwindow/llkeyboard.h
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+++ b/indra/llwindow/llkeyboard.h
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+/** 
+ * @file llkeyboard.h
+ * @brief Handler for assignable key bindings
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#ifndef LL_LLKEYBOARD_H
+#define LL_LLKEYBOARD_H
+
+#include <map>
+
+#include "string_table.h"
+#include "lltimer.h"
+#include "indra_constants.h"
+
+enum EKeystate 
+{
+	KEYSTATE_DOWN,
+	KEYSTATE_LEVEL,
+	KEYSTATE_UP 
+};
+
+typedef void (*LLKeyFunc)(EKeystate keystate);
+
+enum EKeyboardInsertMode
+{
+	LL_KIM_INSERT,
+	LL_KIM_OVERWRITE
+};
+
+class LLKeyBinding
+{
+public:
+	KEY				mKey;
+	MASK			mMask;
+// 	const char		*mName; // unused
+	LLKeyFunc		mFunction;
+};
+
+class LLWindowCallbacks;
+
+class LLKeyboard
+{
+public:
+	typedef enum e_numpad_distinct
+	{
+		ND_NEVER,
+		ND_NUMLOCK_OFF,
+		ND_NUMLOCK_ON
+	} ENumpadDistinct;
+
+public:
+	LLKeyboard();
+	virtual ~LLKeyboard();
+
+	void			resetKeys();
+
+
+	F32				getCurKeyElapsedTime()	{ return getKeyElapsedTime( mCurScanKey ); }
+	F32				getCurKeyElapsedFrameCount()	{ return (F32)getKeyElapsedFrameCount( mCurScanKey ); }
+	BOOL			getKeyDown(const KEY key) { return mKeyLevel[key]; }
+	BOOL			getKeyRepeated(const KEY key) { return mKeyRepeated[key]; }
+
+	BOOL			translateKey(const U16 os_key, KEY *translated_key);
+	U16				inverseTranslateKey(const KEY translated_key);
+	BOOL			handleTranslatedKeyUp(KEY translated_key, U32 translated_mask);		// Translated into "Linden" keycodes
+	BOOL			handleTranslatedKeyDown(KEY translated_key, U32 translated_mask);	// Translated into "Linden" keycodes
+
+
+	virtual BOOL	handleKeyUp(const U16 key, MASK mask) = 0;
+	virtual BOOL	handleKeyDown(const U16 key, MASK mask) = 0;
+
+	// Asynchronously poll the control, alt, and shift keys and set the
+	// appropriate internal key masks.
+	virtual void	resetMaskKeys() = 0;
+	virtual void	scanKeyboard() = 0;															// scans keyboard, calls functions as necessary
+	// Mac must differentiate between Command = Control for keyboard events
+	// and Command != Control for mouse events.
+	virtual MASK	currentMask(BOOL for_mouse_event) = 0;
+	virtual KEY		currentKey() { return mCurTranslatedKey; }
+
+	EKeyboardInsertMode getInsertMode()	{ return mInsertMode; }
+	void toggleInsertMode();
+
+	static BOOL		maskFromString(const LLString& str, MASK *mask);		// False on failure
+	static BOOL		keyFromString(const LLString& str, KEY *key);			// False on failure
+	static LLString	stringFromKey(KEY key);
+
+	e_numpad_distinct getNumpadDistinct() { return mNumpadDistinct; }
+	void setNumpadDistinct(e_numpad_distinct val) { mNumpadDistinct = val; }
+
+	void setCallbacks(LLWindowCallbacks *cbs) { mCallbacks = cbs; }
+protected:
+	F32				getKeyElapsedTime( KEY key );  // Returns time in seconds since key was pressed.
+	S32				getKeyElapsedFrameCount( KEY key );  // Returns time in frames since key was pressed.
+	void 			addKeyName(KEY key, const LLString& name);
+
+protected:
+	std::map<U16, KEY>	mTranslateKeyMap;		// Map of translations from OS keys to Linden KEYs
+	std::map<KEY, U16>	mInvTranslateKeyMap;	// Map of translations from Linden KEYs to OS keys
+	LLWindowCallbacks *mCallbacks;
+
+	LLTimer			mKeyLevelTimer[KEY_COUNT];	// Time since level was set
+	S32				mKeyLevelFrameCount[KEY_COUNT];	// Frames since level was set
+	BOOL			mKeyLevel[KEY_COUNT];		// Levels
+	BOOL			mKeyRepeated[KEY_COUNT];	// Key was repeated
+	BOOL			mKeyUp[KEY_COUNT];			// Up edge
+	BOOL			mKeyDown[KEY_COUNT];		// Down edge
+	KEY				mCurTranslatedKey;
+	KEY				mCurScanKey;		// Used during the scanKeyboard()
+
+	e_numpad_distinct mNumpadDistinct;
+
+	EKeyboardInsertMode mInsertMode;
+
+	static std::map<KEY,LLString> sKeysToNames;
+	static std::map<LLString,KEY> sNamesToKeys;
+};
+
+extern LLKeyboard *gKeyboard;
+
+#endif