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diff --git a/indra/newview/lltransientfloatermgr.h b/indra/newview/lltransientfloatermgr.h
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+/** 
+ * @file lltransientfloatermgr.h
+ * @brief LLFocusMgr base class
+ *
+ * $LicenseInfo:firstyear=2002&license=viewergpl$
+ * 
+ * Copyright (c) 2002-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * 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://secondlifegrid.net/programs/open_source/licensing/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://secondlifegrid.net/programs/open_source/licensing/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.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLTRANSIENTFLOATERMGR_H
+#define LL_LLTRANSIENTFLOATERMGR_H
+
+#include "llui.h"
+#include "llsingleton.h"
+#include "llfloater.h"
+
+class LLTransientFloater;
+
+/**
+ * Provides functionality to hide transient floaters.
+ */
+class LLTransientFloaterMgr: public LLSingleton<LLTransientFloaterMgr>
+{
+protected:
+	LLTransientFloaterMgr();
+	friend class LLSingleton<LLTransientFloaterMgr>;
+
+public:
+	enum ETransientGroup
+	{
+		GLOBAL, DOCKED, IM
+	};
+
+	void registerTransientFloater(LLTransientFloater* floater);
+	void unregisterTransientFloater(LLTransientFloater* floater);
+	void addControlView(ETransientGroup group, LLView* view);
+	void removeControlView(ETransientGroup group, LLView* view);
+	void addControlView(LLView* view);
+	void removeControlView(LLView* view);
+
+private:
+	void hideTransientFloaters(S32 x, S32 y);
+	void leftMouseClickCallback(S32 x, S32 y, MASK mask);
+	bool isControlClicked(std::set<LLView*>& set, S32 x, S32 y);
+private:
+	std::set<LLTransientFloater*> mTransSet;
+
+	typedef std::set<LLView*> controls_set_t;
+	typedef std::map<ETransientGroup, std::set<LLView*> > group_controls_t;
+	group_controls_t mGroupControls;
+};
+
+/**
+ * An abstract class declares transient floater interfaces.
+ */
+class LLTransientFloater
+{
+protected:
+	/**
+	 * Class initialization method.
+	 * Should be called from descendant constructor.
+	 */
+	void init(LLFloater* thiz);
+public:
+	virtual LLTransientFloaterMgr::ETransientGroup getGroup() = 0;
+	bool isTransientDocked() { return mFloater->isDocked(); };
+	void setTransientVisible(BOOL visible) {mFloater->setVisible(visible); }
+
+private:
+	LLFloater* mFloater;
+};
+
+#endif  // LL_LLTRANSIENTFLOATERMGR_H