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diff --git a/intern/ghost/intern/GHOST_ModifierKeys.h b/intern/ghost/intern/GHOST_ModifierKeys.h
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+/**
+ * $Id$
+ * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version. The Blender
+ * Foundation also sells licenses for use in proprietary software under
+ * the Blender License.  See http://www.blender.org/BL/ for information
+ * about this.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL/BL DUAL LICENSE BLOCK *****
+ */
+
+/**
+
+ * $Id$
+ * Copyright (C) 2001 NaN Technologies B.V.
+ * @author	Maarten Gribnau
+ * @date	May 17, 2001
+ */
+
+#ifndef _GHOST_MODIFIER_KEYS_H_
+#define _GHOST_MODIFIER_KEYS_H_
+
+#include "GHOST_Types.h"
+
+struct GHOST_ModifierKeys
+{
+    /**
+     * Constructor.
+     */
+    GHOST_ModifierKeys();
+
+	/**
+	 * Returns the modifier key's key code from a modifier key mask.
+	 * @param mask The mask of the modifier key.
+	 * @return The modifier key's key code.
+	 */
+	static GHOST_TKey getModifierKeyCode(GHOST_TModifierKeyMask mask);
+
+    
+    /**
+     * Returns the state of a single modifier key.
+     * @param mask. Key state to return.
+     * @return The state of the key (pressed == true).
+     */
+    virtual bool get(GHOST_TModifierKeyMask mask) const;
+    
+    /**
+     * Updates the state of a single modifier key.
+     * @param mask. Key state to update.
+     * @param down. The new state of the key.
+     */
+    virtual void set(GHOST_TModifierKeyMask mask, bool down);
+    
+    /**
+     * Sets the state of all modifier keys to up.
+     */
+    virtual void clear();
+
+	/**
+	 * Determines whether to modifier key states are equal.
+	 * @param keys. The modifier key state to compare to.
+	 * @return Indication of equality.
+	 */
+	virtual bool equals(const GHOST_ModifierKeys& keys) const;
+    
+    /** Bitfield that stores the appropriate key state. */
+    GHOST_TUns8 m_LeftShift : 1;
+    /** Bitfield that stores the appropriate key state. */
+    GHOST_TUns8 m_RightShift : 1;
+    /** Bitfield that stores the appropriate key state. */
+    GHOST_TUns8 m_LeftAlt : 1;
+    /** Bitfield that stores the appropriate key state. */
+    GHOST_TUns8 m_RightAlt : 1;
+    /** Bitfield that stores the appropriate key state. */
+    GHOST_TUns8 m_LeftControl : 1;
+    /** Bitfield that stores the appropriate key state. */
+    GHOST_TUns8 m_RightControl : 1;
+    /** Bitfield that stores the appropriate key state. APPLE only! */
+    GHOST_TUns8 m_Command : 1;
+};
+
+#endif // _GHOST_MODIFIER_KEYS_H_