source: extensions/gally/piwigo-2.0/rating.js @ 31033

var gRatingOptions, gRatingButtons, gUserRating;

function makeNiceRatingForm(options)
{
  gRatingOptions = options || {};
  var form = document.getElementById('rateForm');
  if (!form) return; //? template changed

  gRatingButtons = form.getElementsByTagName('input');
  gUserRating = "";
  for (var i=0; i<gRatingButtons.length; i++)
  {
    if ( gRatingButtons[i].type=="button" )
    {
      gUserRating = gRatingButtons[i].value;
      break;
    }
  }

  for (var i=0; i<gRatingButtons.length; i++)
  {
    var rateButton = gRatingButtons[i];
    rateButton.initialRateValue = rateButton.value; // save it as a property
    try { rateButton.type = "button"; } catch (e){}// avoid normal submit (use ajax); not working in IE6

    if (navigator.userAgent.indexOf('AppleWebKit/') == -1 && navigator.userAgent.indexOf('MSIE 8')==-1) rateButton.value = ""; //hide the text IE<8/Opera - breaks safari
    with (rateButton.style)
    {
      textIndent = "-50px"; //hide the text FF
      marginLeft = marginRight = 0;
    }

    if (i!=gRatingButtons.length-1 && rateButton.nextSibling.nodeType == 3 /*TEXT_NODE*/)
      rateButton.parentNode.removeChild(rateButton.nextSibling);
    if (i>0 && rateButton.previousSibling.nodeType == 3 /*TEXT_NODE*/)
      rateButton.parentNode.removeChild(rateButton.previousSibling);

    if(window.addEventListener){ // Mozilla, Netscape, Firefox
      rateButton.addEventListener("click", updateRating, false );
      rateButton.addEventListener("mouseout", resetRatingStarDisplay, false );
      rateButton.addEventListener("mouseover", updateRatingStarDisplayEvt, false );
    }
    else if(window.attachEvent) { // IE
      rateButton.attachEvent("onclick", updateRating);
      rateButton.attachEvent("onmouseout", resetRatingStarDisplay);
      rateButton.attachEvent("onmouseover", updateRatingStarDisplayEvt);
    }
  }
  resetRatingStarDisplay();
}

function resetRatingStarDisplay()
{
  updateRatingStarDisplay( gUserRating );
}

function updateRatingStarDisplay(userRating)
{
  for (var i=0; i<gRatingButtons.length; i++)
    gRatingButtons[i].className = (userRating!=="" && userRating>=gRatingButtons[i].initialRateValue ) ? "rateButtonStarFull" : "rateButtonStarEmpty";
}

function updateRatingStarDisplayEvt(e)
{
  updateRatingStarDisplay(
    e.target ? e.target.initialRateValue : e.srcElement.initialRateValue);
}

function updateRating(e)
{
  var rateButton = e.target || e.srcElement;
  if (rateButton.initialRateValue == gUserRating)
    return false; //nothing to do

  for (var i=0; i<gRatingButtons.length; i++) gRatingButtons[i].disabled=true;
  var y = new PwgWS(gRatingOptions.rootUrl);
  y.callService(
    "pwg.images.rate", {image_id: gRatingOptions.image_id, rate: rateButton.initialRateValue } ,
    {
      onFailure: function(num, text) {
        alert(num + " " + text);
        document.location = rateButton.form.action + "&rate="+rateButton.initialRateValue;
      },
      onSuccess: function(result) {
        gUserRating = rateButton.initialRateValue;
        for (var i=0; i<gRatingButtons.length; i++) gRatingButtons[i].disabled=false;
        if (gRatingOptions.updateRateElement) gRatingOptions.updateRateElement.innerHTML = gRatingOptions.updateRateText;
        if (gRatingOptions.ratingSummaryElement)
        {
          var t = gRatingOptions.ratingSummaryText;
          var args =[result.average, result.count, result.stdev], idx = 0, rexp = new RegExp( /%\.?\d*[sdf]/ );
          _xxx = t.match( rexp );
          while (idx<args.length) t=t.replace(rexp, args[idx++]);
          gRatingOptions.ratingSummaryElement.innerHTML = t;
        }
      }
    }
  );
  return false;
}