Liferay.autoFields = new Class({
/**
 * OPTIONS
 *
 * Required
 * addText {string}: The text you wish to use for the "Add" link.
 * clearText {string}: The text you wish to use for the "Clear" link (this link removes all of the added forms except the very first one).
 * container {string|object}: A jQuery selector that specifies where you wish to append the HTML to.
 * confirmText {string}: the text you wish to use to confirm that the user wishes to clear all of the added buttons (leave empty to not confirm).
 * html {string}: HTML to append to the end of the container.
 * removeText {string}: The text you wish to use for the "Remove" link.
 * rowType {string}: The html tag for the row of fields (eg. fieldset, div or tr).
 *
 * Callbacks
 * init {function}: Called after the class has fully initialized.
 * onAdd {function}: Called after new fields have been added.
 * onRemove {function}: Called after fields have been removed.
 * onClear {function}: Called after the form fields have been returned.
 */
initialize: function(options) {
var instance = this;
options = jQuery.extend(options, {});
instance._html = jQuery(options.html || '');
instance._container = jQuery(options.container || '');
instance._addText = options.addText || '';
instance._removeText = options.removeText || '';
instance._clearText = options.clearText || '';
instance._confirmText = options.confirmText || '';
instance._rowType = options.rowType || '';
instance._onAdd = options.onAdd;
instance._onRemove = options.onRemove;
instance._onClear = options.onClear;
instance._init = options.init || false;
instance._numField = 1;
instance._run();
if (instance._init) {
instance._init();
}
},
_run: function() {
var instance = this;
var container = instance._container;
if (container.length) {
var html = instance._html;
var addLink, removeLink, clearLink;
var links = jQuery('<span class="lfr-control-links"></span>');
if (instance._addText) {
addLink = jQuery('<a href="javascript:;">' + instance._addText + '</a>');
addLink.click(
   function() {
   var newField = instance._addFields();
   if (instance._onAdd) {
   instance._onAdd(newField);
   }
   }
);
links.append(addLink);
}
if (instance._removeText) {
removeLink = jQuery('<a href="javascript:;">' + instance._removeText + '</a>');
removeLink.hide();
removeLink.click(
   function() {
   instance._removeFields();
   if (instance._onRemove) {
   instance._onRemove();
   }
   }
);
links.append(removeLink);
}
if (instance._clearText) {
clearLink = jQuery('<a href="javascript:;">' + instance._clearText + '</a>');
clearLink.click(
   function() {
   instance._clearFields();
   if (instance._onClear) {
   instance._onClear();
   }
   }
);
links.append(clearLink);
}
container.after(links);
instance._controlLinks = links;
}
},
_addFields: function() {
var instance = this;
var container = instance._container;
var html = instance._html.clone();
container.append(html);
instance._numField++;
var removeLink = instance._controlLinks.find('a:eq(1)');
if (removeLink.is(':hidden')) {
removeLink.show();
}
return html;
},
_clearFields: function() {
var instance = this;
var container = instance._container;
var rows = container.find(instance._rowType).not(':first');
var confirmBox = true;
if (instance._confirmText) {
   confirmBox = confirm(instance._confirmText);
}
if (confirmBox) {
   rows.remove();
   instance._numField = 1;
}
},
_removeFields: function() {
var instance = this;
var container = instance._container;
var lastRow = container.find(instance._rowType + ':last');
if (instance._numField > 1) {
   lastRow.remove();
   --instance._numField;
}
if (instance._numField <= 1) {
   var removeLink = instance._controlLinks.find('a:eq(1)');
   if (removeLink.is(':visible')) {
   removeLink.hide();
   }
}
}
});