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diff --git a/indra/llcharacter/llgesture.h b/indra/llcharacter/llgesture.h
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+++ b/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-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#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