/**
* Purpose:              Font sizer class, handles increasing and decreasing font size of a page.
*                       It increases the font in 10% increments. By getting the level / 10 + 1.
*                       i.e. level 2 is .2 + 1 so 1.2 or 120%.
*
* Requires:             JQuery and the JQuery cookies plugin.
*
* Use:                  Setup the fontsizer $.FontSizer.Init(options); the two options are
*                       min and max, for the min level and max level.
*                       Defaults are min: -3 and max: 5.
*
* Author:               Stefan Sedich (stefan.sedich@gmail.com
* DEKE: Modified to support only certain elements
*/
$.FontSizer = {

	level: 0,
  element: null,

  options : {            
  	min: -3,
    max: 5
	},

  Init : function(element, options) {
  	$.FontSizer.element = element;
       		
		if(options)
			$.FontSizer.options = $.extend($.FontSizer.options, options);

			//Get the current level from cookies.
			var level = ($.cookie('font_level') != null) ? $.cookie('font_level') : 0;                      

			//Set the font size to the current leve.
			$.FontSizer.SetSize(level);

		},

	IncreaseSize : function() {

		if(($.FontSizer.level) + 1 <= $.FontSizer.options.max) {            
    	//If we have not exceded the max level,
      //Get the next level and the set the size to this level.
      var next = (parseInt($.FontSizer.level) + 1);
      $.FontSizer.SetSize(next);  
		}

	},

  DecreaseSize : function() {
  	if(($.FontSizer.level - 1) >= $.FontSizer.options.min) {
    	//If we have not exceded the min level,
      //Get the next level and the set the size to this level.
      var next = (parseInt($.FontSizer.level) - 1);
      $.FontSizer.SetSize(next);  
		}      
    
  },      

  SetSize: function(level) {

  	//Set the current level in the member variable and the cookie.
    $.FontSizer.level = level;      
    $.cookie('font_level', level);

		//Work out the new em value and set it.
    var level = (level / 10) + 1;
    $( $.FontSizer.element ).css("fontSize", level+"em");    

	},

	Reset: function() {
            
		//Reset the level back to 0
    $.FontSizer.SetSize(0);
        
	}

};