STORM-1016 FIXED Crash after pressing ctrl-shift-w while there is an undocked sidepanel.

Reason: The shortcut closes all floaters, including those wrapping undocked sidepanels.
The sidepanels get destroyed as well, while they are still referenced by the side tray.

Fix: Dock (i.e. move to side tray) the sidepanel before its floater gets destroyed.

indra/llui/llfloater.cpp

@@ -2865,7 +2865,7 @@ void LLFloater::initFromParams(const LLFloater::Params& p)
 	// close callback 
 	if (p.close_callback.isProvided())
 	{
-		mCloseSignal.connect(initCommitCallback(p.close_callback));
+		setCloseCallback(initCommitCallback(p.close_callback));
 	}
 }
 
@@ -2875,6 +2875,11 @@ boost::signals2::connection LLFloater::setMinimizeCallback( const commit_signal_
 	return mMinimizeSignal->connect(cb); 
 }
 
+boost::signals2::connection LLFloater::setCloseCallback( const commit_signal_t::slot_type& cb )
+{
+	return mCloseSignal.connect(cb);
+}
+
 LLFastTimer::DeclareTimer POST_BUILD("Floater Post Build");
 
 bool LLFloater::initFloaterXML(LLXMLNodePtr node, LLView *parent, const std::string& filename, LLXMLNodePtr output_node)

indra/llui/llfloater.h

@@ -144,6 +144,7 @@ public:
 	bool buildFromFile(const std::string &filename, LLXMLNodePtr output_node = NULL);
 
 	boost::signals2::connection setMinimizeCallback( const commit_signal_t::slot_type& cb );
+	boost::signals2::connection setCloseCallback( const commit_signal_t::slot_type& cb );
 
 	void initFromParams(const LLFloater::Params& p);
 	bool initFloaterXML(LLXMLNodePtr node, LLView *parent, const std::string& filename, LLXMLNodePtr output_node = NULL);

indra/newview/llsidetray.cpp

@@ -96,6 +96,7 @@ bool	LLSideTray::instanceCreated	()
 
 class LLSideTrayTab: public LLPanel
 {
+	LOG_CLASS(LLSideTrayTab);
 	friend class LLUICtrlFactory;
 	friend class LLSideTray;
 public:
@@ -122,6 +123,8 @@ protected:
 	void			undock(LLFloater* floater_tab);
 
 	LLSideTray*		getSideTray();
+
+	void			onFloaterClose(LLSD::Boolean app_quitting);
 	
 public:
 	virtual ~LLSideTrayTab();
@@ -140,6 +143,8 @@ public:
 	void			onOpen		(const LLSD& key);
 	
 	void			toggleTabDocked();
+	void			setDocked(bool dock);
+	bool			isDocked() const;
 
 	BOOL			handleScrollWheel(S32 x, S32 y, S32 clicks);
 
@@ -151,6 +156,7 @@ private:
 	std::string	mDescription;
 	
 	LLView*	mMainPanel;
+	boost::signals2::connection mFloaterCloseConn;
 };
 
 LLSideTrayTab::LLSideTrayTab(const Params& p)
@@ -271,6 +277,35 @@ void LLSideTrayTab::toggleTabDocked()
 	LLFloaterReg::toggleInstance("side_bar_tab", tab_name);
 }
 
+// Same as toggleTabDocked() apart from making sure that we do exactly what we want.
+void LLSideTrayTab::setDocked(bool dock)
+{
+	if (isDocked() == dock)
+	{
+		llwarns << "Tab " << getName() << " is already " << (dock ? "docked" : "undocked") << llendl;
+		return;
+	}
+
+	toggleTabDocked();
+}
+
+bool LLSideTrayTab::isDocked() const
+{
+	return dynamic_cast<LLSideTray*>(getParent()) != NULL;
+}
+
+void LLSideTrayTab::onFloaterClose(LLSD::Boolean app_quitting)
+{
+	// If user presses Ctrl-Shift-W, handle that gracefully by docking all
+	// undocked tabs before their floaters get destroyed (STORM-1016).
+
+	// Don't dock on quit for the current dock state to be correctly saved.
+	if (app_quitting) return;
+
+	lldebugs << "Forcibly docking tab " << getName() << llendl;
+	setDocked(true);
+}
+
 BOOL LLSideTrayTab::handleScrollWheel(S32 x, S32 y, S32 clicks)
 {
 	// Let children handle the event
@@ -294,6 +329,7 @@ void LLSideTrayTab::dock(LLFloater* floater_tab)
 		return;
 	}
 
+	mFloaterCloseConn.disconnect();
 	setRect(side_tray->getLocalRect());
 	reshape(getRect().getWidth(), getRect().getHeight());
 
@@ -342,6 +378,7 @@ void LLSideTrayTab::undock(LLFloater* floater_tab)
 	}
 
 	floater_tab->addChild(this);
+	mFloaterCloseConn = floater_tab->setCloseCallback(boost::bind(&LLSideTrayTab::onFloaterClose, this, _2));
 	floater_tab->setTitle(mTabTitle);
 	floater_tab->setName(getName());