/*
* jQuery idleTimer plugin
* by Paul irish.
* http://github.com/paulirish/yui-misc/tree/
* adapted from YUI idle timer by nzakas:
* http://github.com/nzakas/yui-misc/
* Copyright (c) 2009 Nicholas C. Zakas
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
 
(function($){
 
$.idleTimer = {
 
    idle : false, //indicates if the user is idle
    tId : -1, //timeout ID
    enabled : false, //indicates if the idle timer is enabled
    timeout : 30000, //the amount of time (ms) before the user is considered idle
 
        
    /* (intentionally not documented)
* Handles a user event indicating that the user isn't idle.
* @param {Event} event A DOM2-normalized event object.
* @return {void}
*/
    handleUserEvent : function(){
    
        //clear any existing timeout
        clearTimeout($.idleTimer.tId);
        
        //if the idle timer is enabled
        if ($.idleTimer.enabled){
        
            //if it's idle, that means the user is no longer idle
            if ($.idleTimer.idle){
                $.idleTimer.toggleIdleState();
            } else {
                //set a new timeout
                $.idleTimer.tId = setTimeout($.idleTimer.toggleIdleState, $.idleTimer.timeout);
            }
        }
    },
    
    /* (intentionally not documented)
* Toggles the idle state and fires an appropriate event.
* @return {void}
*/
    toggleIdleState : function(){
    
        //toggle the state
        $.idleTimer.idle = !$.idleTimer.idle;
        
        //fire appropriate event
        $(document).trigger(($.idleTimer.idle ? "idle" : "active") + '.idleTimer');
    },
 
    
    /**
* Indicates if the idle timer is running or not.
* @return {Boolean} True if the idle timer is running, false if not.
* @method isRunning
* @static
*/
    isRunning: function(){
        return $.idleTimer.enabled;
    },
    
    /**
* Indicates if the user is idle or not.
* @return {Boolean} True if the user is idle, false if not.
* @method isIdle
* @static
*/
    isIdle: function(){
        return $.idleTimer.idle;
    },
    
    /**
* Starts the idle timer. This adds appropriate event handlers
* and starts the first timeout.
* @param {int} newTimeout (Optional) A new value for the timeout period in ms.
* @return {void}
* @method start
* @static
*/
    start: function(newTimeout){
        
        //set to enabled
        $.idleTimer.enabled = true;
        
        //set idle to false to begin with
        $.idleTimer.idle = false;
        
        //assign a new timeout if necessary
        if (typeof newTimeout == "number"){
            $.idleTimer.timeout = newTimeout;
        }
        
        //assign appropriate event handlers
        $(document).bind('mousemove keydown',$.idleTimer.handleUserEvent);
        
        
        //set a timeout to toggle state
        $.idleTimer.tId = setTimeout($.idleTimer.toggleIdleState, $.idleTimer.timeout);
    },
    
    /**
* Stops the idle timer. This removes appropriate event handlers
* and cancels any pending timeouts.
* @return {void}
* @method stop
* @static
*/
    stop: function(){

        //set to disabled
        $.idleTimer.enabled = false;
        
        //clear any pending timeouts
        clearTimeout($.idleTimer.tId);
        
        //detach the event handlers
        $(document).unbind('mousemove keydown',$.idleTimer.handleUserEvent);
    }
    
      }; // end of $.idleTimer{}
 
    
 
})(jQuery);