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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
+ *
+ * $LicenseInfo:firstyear=2002&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library 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
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#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