var FONT_SIZE_COOKIE_NAME = "enterasysFontSize";

function createCookie(name,value,days) {
  if (days) {
    var date = new Date();
    date.setTime(date.getTime()+(days*24*60*60*1000));
    var expires = "; expires="+date.toGMTString();
  }
  else expires = "";
  document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
  var nameEQ = name + "=";
  var ca = document.cookie.split(';');
  for(var i=0;i < ca.length;i++) {
    var c = ca[i];
    while (c.charAt(0)==' ') c = c.substring(1,c.length);
    if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
  }
  return null;
}

// START: Font Resizing
$(document).ready(initPageFontSize);

var DEFAULT_FONT_SIZE_IN_PIXELS = (!IS_Mac) ? 16 : 14;
var INITIAL_FONT_SIZE_IN_PIXELS = 11;

// plus/ minus image sources for font controls
// defined as global to make things faster
var sMinusDisabled = "url(" + sFolderLevel + "/img/interface/text-size-minus-x.gif)";
var oPlusDisabled = "url(" + sFolderLevel + "/img/interface/text-size-plus-x.gif)";
var oMinusEnabled = "url(" + sFolderLevel + "/img/interface/text-size-minus-0.gif)";
var oPlusEnabled = "url(" + sFolderLevel + "/img/interface/text-size-plus-0.gif)";

function initPageFontSize()
{
	var iFontSize = readCookie(FONT_SIZE_COOKIE_NAME);
	
	if (iFontSize == null)
	{
		iFontSize = INITIAL_FONT_SIZE_IN_PIXELS;
	}
	setFontSize(iFontSize);
}

function changeFont(bLarger)
{
	var iChange = (bLarger) ? 1 : -1;
	var iNewFontSize = getCurrentFontSize() + iChange;
	setFontSize(iNewFontSize);
}

function setFontSize(iNewFontSize)
{
	var MAX_FONT_SIZE = 13;
	var MIN_FONT_SIZE = 11;
	
	if (iNewFontSize <= MIN_FONT_SIZE)
	{
		iNewFontSize = MIN_FONT_SIZE;
		$("#textMinus").css({backgroundImage : sMinusDisabled})
		$("#textPlus").css({backgroundImage : oPlusEnabled})
	}
	if (iNewFontSize >= MAX_FONT_SIZE)
	{
		iNewFontSize = MAX_FONT_SIZE;
		$("#textMinus").css({backgroundImage : oMinusEnabled})
		$("#textPlus").css({backgroundImage : oPlusDisabled})
	}
	
	if (iNewFontSize < MAX_FONT_SIZE && iNewFontSize > MIN_FONT_SIZE)
	{
		$("#textMinus").css({backgroundImage : oMinusEnabled})
		$("#textPlus").css({backgroundImage : oPlusEnabled})
	}
	
	var sFontSizePercentage = (iNewFontSize / DEFAULT_FONT_SIZE_IN_PIXELS * 100) + "%";
	$("body").css({fontSize : sFontSizePercentage});
	createCookie(FONT_SIZE_COOKIE_NAME, iNewFontSize, 365);
}

function getCurrentFontSize()
{
	var sCurrent = $("body").css("fontSize");
	if (sCurrent.indexOf("px") > -1)
	{
		parseInt(sCurrent)
	}
	return ((parseFloat(sCurrent) / 100) * DEFAULT_FONT_SIZE_IN_PIXELS);
}
// END: Font Resizing