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htdocs/js/balloon.js  view on Meta::CPAN

        var id = balloonSelects[i].id || balloonSelects[i].name;
        myHash[id] = 1;
      }
      balloonInvisibleSelects = new Array();
      var allSelects = document.getElementsByTagName('select');
      for (var i=0; i<allSelects.length; i++) {
        var id = allSelects[i].id || allSelects[i].name;
        if (self.isOverlap(allSelects[i],self.activeBalloon) && !myHash[id]) {
          balloonInvisibleSelects.push(allSelects[i]);
          self.setStyle(allSelects[i],'visibility','hidden');
        }
      }
    }
    else if (balloonInvisibleSelects) {
      for (var i=0; i < balloonInvisibleSelects.length; i++) {
        var id = balloonInvisibleSelects[i].id || balloonInvisibleSelects[i].name;
        self.setStyle(balloonInvisibleSelects[i],'visibility','visible');
     }
     balloonInvisibleSelects = null;
    }
  }

  // show/hide any user-specified elements that overlap the balloon
  if (self.hide) {
    var display = visible ? 'inline' : 'none';
    for (var n=0;n<self.hide.length;n++) {
      if (self.isOverlap(self.activeBalloon,self.hide[n])) {
        self.setStyle(self.hide[n],'display',display);
      }
    }
  }
}

// Try to find overlap
Balloon.prototype.isOverlap = function(el1,el2) {
  if (!el1 || !el2) return false;
  var R1 = this.getLoc(el1,'region');
  var R2 = this.getLoc(el2,'region');
  if (!R1 || !R2) return false;

  if ((R1.x1 < R2.x2) && (R1.x2 > R2.x1) && (R1.y1 < R2.y2) && (R1.y2 > R2.y1)) { 
    return new Array((R1.x1 < R2.x1 ? R1.x2 - R2.x1 : R2.x2 - R1.x1),(R1.y1 < R2.y1 ? R1.y2 - R2.y1 : R2.y2 - R1.y1));
  } else {
    return false;
  }
}

// Test for the same element
Balloon.prototype.isSameElement = function(el1,el2) {
  if (!el1 || !el2) return false;
  return el1 == el2;
}


///////////////////////////////////////////////////////
// Security -- get the balloon contents while checking 
// for disallowed elements.
//////////////////////////////////////////////////////
Balloon.prototype.getAndCheckContents = function(caption) {
  var originalCaption = caption;
  var notAllowed = 'are not allowed in popup balloons in this web site.  \
Please contact the site administrator for assistance.';
  var notSupported = 'AJAX is not supported for popup balloons in this web site.  \
Please contact the site administrator for assistance.';
  
  // no Help Url without AJAX
  if (this.helpUrl && !this.allowAJAX) {
    alert('Sorry, you have specified help URL '+this.helpUrl+' but '+notSupported);
    return null;
  }

  // look for a url in the balloon contents
  if (caption.match(/^url:/)) {
    this.activeUrl = caption.replace(/^url:/,'');
    caption = '';
  }
  // or if the text is a bare hyperlink
  else if (caption.match(/^(https?:|\/|ftp:)\S+$/i)) {
    this.activeUrl = caption;
    caption = '';
  }

  // Make sure AJAX is allowed
  if (this.activeUrl && !this.allowAJAX) {
    alert('Sorry, you asked for '+originalCaption+' but '+notSupported);
    return null;
  }  

  // check if the contents are to be retrieved from an element
  if (caption.match(/^load:/)) {
    var load = caption.split(':');
    if (!$(load[1])) alert ('problem locating element '+load[1]);
    caption = $(load[1]).innerHTML;
    this.loadedFromElement = true;
  }

   // check if the contents are to be generated by javascript
   if (caption.match(/^javascript:/)) {
     var jsFunctionCall = caption.substring(11);
     caption = eval(jsFunctionCall);
   }

  // check if iframes are allowed
  if (caption.match(/\<\s*iframe/i) && !this.allowIframes) {
    alert('Sorry: iframe elements '+notAllowed);
    return null;
  }

  // check if event handlers are allowed
  if (caption.match(/\bon(load|mouse|click|unload|before)[^=]*=/i) && !this.allowEventHandlers) {
    alert('Sorry: JavaScript event handlers '+notAllowed);
    return null;
  }

  // check for script elements
  if (caption.match(/\<\s*script/i) && !this.allowScripts) {
    alert('Sorry: <script> elements '+notAllowed);
    return null;
  }

  // request the contents
  this.currentHelpText = this.getContents(caption);
  this.loadedFromElement = false;