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diff --git a/linden/indra/llcharacter/llgesture.h b/linden/indra/llcharacter/llgesture.h
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+/** 
+ * @file llgesture.h
+ * @brief A gesture is a combination of a triggering chat phrase or
+ * key, a sound, an animation, and a chat string.
+ *
+ * Copyright (c) 2002-2007, Linden Research, Inc.
+ * 
+ * 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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.
+ */
+
+#ifndef LL_LLGESTURE_H
+#define LL_LLGESTURE_H
+
+#include "llanimationstates.h"
+#include "lluuid.h"
+#include "llstring.h"
+#include "lldarray.h"
+
+class LLGesture
+{
+public:
+        LLGesture();
+        LLGesture(KEY key, MASK mask, const std::string &trigger, 
+                const LLUUID &sound_item_id, const std::string &animation, 
+                const std::string &output_string);
+
+        LLGesture(U8 **buffer, S32 max_size); // deserializes, advances buffer
+        LLGesture(const LLGesture &gesture);
+        const LLGesture &operator=(const LLGesture &rhs);
+
+        virtual ~LLGesture() {};
+
+        // Accessors
+        KEY                                     getKey() const                  { return mKey; }
+        MASK                            getMask() const                 { return mMask; }
+        const std::string&      getTrigger() const              { return mTrigger; }
+        const LLUUID&           getSound() const                { return mSoundItemID; }
+        const std::string&      getAnimation() const    { return mAnimation; }
+        const std::string&      getOutputString() const { return mOutputString; }
+
+        // Triggers if a key/mask matches it
+        virtual BOOL trigger(KEY key, MASK mask);
+
+        // Triggers if case-insensitive substring matches (assumes string is lowercase)
+        virtual BOOL trigger(const LLString &string);
+
+        // non-endian-neutral serialization
+        U8 *serialize(U8 *buffer) const;
+        U8 *deserialize(U8 *buffer, S32 max_size);
+        static S32 getMaxSerialSize();
+
+protected:
+        KEY                                     mKey;                   // usually a function key
+        MASK                            mMask;                  // usually MASK_NONE, or MASK_SHIFT
+        std::string             mTrigger;               // string, no whitespace allowed
+        std::string             mTriggerLower;  // lowercase version of mTrigger
+        LLUUID                          mSoundItemID;   // ItemID of sound to play, LLUUID::null if none
+        std::string                     mAnimation;             // canonical name of animation or face animation
+        std::string             mOutputString;  // string to say
+
+        static const S32        MAX_SERIAL_SIZE;
+};
+
+class LLGestureList
+{
+public:
+        LLGestureList();
+        virtual ~LLGestureList();
+
+        // Triggers if a key/mask matches one in the list
+        BOOL trigger(KEY key, MASK mask);
+
+        // Triggers if substring matches and generates revised string.
+        BOOL triggerAndReviseString(const LLString &string, LLString* revised_string);
+
+        // Used for construction from UI
+        S32 count() const                                               { return mList.count(); }
+        virtual LLGesture* get(S32 i) const             { return mList.get(i); }
+        virtual void put(LLGesture* gesture)    { mList.put( gesture ); }
+        void deleteAll();
+
+        // non-endian-neutral serialization
+        U8 *serialize(U8 *buffer) const;
+        U8 *deserialize(U8 *buffer, S32 max_size);
+        S32 getMaxSerialSize();
+
+protected:
+        // overridden by child class to use local LLGesture implementation
+        virtual LLGesture *create_gesture(U8 **buffer, S32 max_size);
+
+protected:
+        LLDynamicArray<LLGesture*>      mList;
+
+        static const S32        SERIAL_HEADER_SIZE;
+};
+
+#endif