/*
** code by tomal
** 2015
*/

$('document').ready(function(){
    $('head').append('<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css">');
    $('.grid_5').html('<p style="color: black" align="right">Масштаб <span style="cursor: pointer" class="plus" onclick="plus()"><i class="fa fa-plus"></i></span> <span style="cursor: pointer" class="minus" onclick="minus()"><i class="fa fa-minus"></i></span> (+<span class="counter">0</span>0%)</p>');
    var zoom = getCookie('zoom');
    if(zoom != null){
        $('.counter').text(zoom);
        $('body').css('zoom', 1+(zoom/10));
    }
});

function plus(){
    if(parseInt($('.counter').text()) < 10){
        var count = parseInt($('.counter').text())+1;
        $('.counter').text(count);
        setzoom(count);
    }
}

function minus(){
    if(parseInt($('.counter').text()) != 0){
        var count = parseInt($('.counter').text())-1;
        $('.counter').text(count);

        setzoom(count);
    }
}

function setzoom(value){
    $('body').css('zoom', 1+(value/10));
    setCookie("zoom", value, 300, "/");
}

function setCookie(name, value, expiredays, path, domain, secure) {
   if (expiredays) {
      var exdate=new Date();
      exdate.setDate(exdate.getDate()+expiredays);
      var expires = exdate.toGMTString();
   }
   document.cookie = name + "=" + escape(value) +
   ((expiredays) ? "; expires=" + expires : "") +
   ((path) ? "; path=" + path : "") +
   ((domain) ? "; domain=" + domain : "") +
   ((secure) ? "; secure" : "");
}

function getCookie(name) {
   var cookie = " " + document.cookie;
   var search = " " + name + "=";
   var setStr = null;
   var offset = 0;
   var end = 0;
   if (cookie.length > 0) {
      offset = cookie.indexOf(search);
      if (offset != -1) {
         offset += search.length;
         end = cookie.indexOf(";", offset)
         if (end == -1) {
            end = cookie.length;
         }
         setStr = unescape(cookie.substring(offset, end));
      }
   }
   return setStr;
}