Added toggleScreen function, using hot key to loop through all screens.

Comparing to switchToScreen, it is more handy since the user only need
to hit one hotkey.

src/lib/base/EventTypes.cpp

@@ -133,6 +133,7 @@ REGISTER_EVENT(Server, error)
 REGISTER_EVENT(Server, connected)
 REGISTER_EVENT(Server, disconnected)
 REGISTER_EVENT(Server, switchToScreen)
+REGISTER_EVENT(Server, toggleScreen)
 REGISTER_EVENT(Server, switchInDirection)
 REGISTER_EVENT(Server, keyboardBroadcast)
 REGISTER_EVENT(Server, lockCursorToScreen)

src/lib/base/EventTypes.h

@@ -432,6 +432,7 @@ public:
         m_connected(Event::kUnknown),
         m_disconnected(Event::kUnknown),
         m_switchToScreen(Event::kUnknown),
+        m_toggleScreen(Event::kUnknown),
         m_switchInDirection(Event::kUnknown),
         m_keyboardBroadcast(Event::kUnknown),
         m_lockCursorToScreen(Event::kUnknown),
@@ -470,6 +471,13 @@ public:
     */
     Event::Type        switchToScreen();
 
+    //! Get toggle screen event type
+    /*!
+    Returns the toggle screen event type.  The server responds to this
+    by toggling screens.  These is no event data.
+    */
+    Event::Type        toggleScreen();
+
     //! Get switch in direction event type
     /*!
     Returns the switch in direction event type.  The server responds to this
@@ -508,6 +516,7 @@ private:
     Event::Type        m_connected;
     Event::Type        m_disconnected;
     Event::Type        m_switchToScreen;
+    Event::Type        m_toggleScreen;
     Event::Type        m_switchInDirection;
     Event::Type        m_keyboardBroadcast;
     Event::Type        m_lockCursorToScreen;

src/lib/server/Config.cpp

@@ -1182,6 +1182,10 @@ Config::parseAction(ConfigReadContext& s,
 		action = new InputFilter::SwitchToScreenAction(m_events, screen);
 	}
 
+  else if (name == "toggleScreen") {
+    action = new InputFilter::ToggleScreenAction(m_events);
+  }
+
 	else if (name == "switchInDirection") {
 		if (args.size() != 1) {
 			throw XConfigRead(s, "syntax for action: switchInDirection(<left|right|up|down>)");

src/lib/server/InputFilter.cpp

@@ -369,6 +369,32 @@ InputFilter::SwitchToScreenAction::perform(const Event& event)
                                 Event::kDeliverImmediately));
 }
 
+InputFilter::ToggleScreenAction::ToggleScreenAction(IEventQueue* events) :
+    m_events(events)
+{
+    // do nothing
+}
+
+InputFilter::Action*
+InputFilter::ToggleScreenAction::clone() const
+{
+    return new ToggleScreenAction(*this);
+}
+
+String
+InputFilter::ToggleScreenAction::format() const
+{
+    return barrier::string::sprintf("toggleScreen");
+}
+
+void
+InputFilter::ToggleScreenAction::perform(const Event& event)
+{
+    m_events->addEvent(Event(m_events->forServer().toggleScreen(),
+                             event.getTarget(), NULL,
+                             Event::kDeliverImmediately));
+}
+
 InputFilter::SwitchInDirectionAction::SwitchInDirectionAction(
         IEventQueue* events, EDirection direction) :
     m_direction(direction),

src/lib/server/InputFilter.h

@@ -167,6 +167,20 @@ public:
         IEventQueue*            m_events;
     };
     
+    // ToggleScreenAction
+    class ToggleScreenAction : public Action {
+    public:
+        ToggleScreenAction(IEventQueue* events);
+
+        // Action overrides
+        virtual Action* clone() const;
+        virtual String format() const;
+        virtual void perform(const Event&);
+
+    private:
+        IEventQueue* m_events;
+    };
+
     // SwitchInDirectionAction
     class SwitchInDirectionAction : public Action {
     public:

src/lib/server/Server.cpp

@@ -163,6 +163,10 @@ Server::Server(
 							m_inputFilter,
 							new TMethodEventJob<Server>(this,
 								&Server::handleSwitchToScreenEvent));
+  m_events->adoptHandler(m_events->forServer().toggleScreen(),
+              m_inputFilter,
+              new TMethodEventJob<Server>(this,
+                &Server::handleToggleScreenEvent));
 	m_events->adoptHandler(m_events->forServer().switchInDirection(),
 							m_inputFilter,
 							new TMethodEventJob<Server>(this,
@@ -1407,6 +1411,24 @@ Server::handleSwitchToScreenEvent(const Event& event, void*)
 	}
 }
 
+void
+Server::handleToggleScreenEvent(const Event& event, void*)
+{
+  std::string current = getName(m_active);
+  ClientList::const_iterator index = m_clients.find(current);
+  if (index == m_clients.end()) {
+    LOG((CLOG_DEBUG1 "screen \"%s\" not active", current.c_str()));
+  }
+  else {
+    ++index;
+    if (index == m_clients.end()) {
+      index = m_clients.begin();
+    }
+    jumpToScreen(index->second);
+  }
+}
+
+
 void
 Server::handleSwitchInDirectionEvent(const Event& event, void*)
 {

src/lib/server/Server.h

@@ -308,6 +308,7 @@ private:
     void                handleClientDisconnected(const Event&, void*);
     void                handleClientCloseTimeout(const Event&, void*);
     void                handleSwitchToScreenEvent(const Event&, void*);
+    void                handleToggleScreenEvent(const Event&, void*);
     void                handleSwitchInDirectionEvent(const Event&, void*);
     void                handleKeyboardBroadcastEvent(const Event&,void*);
     void                handleLockCursorToScreenEvent(const Event&, void*);