(function ($) {

/**
 * Attaches the autocompleteRue89 behavior to all required fields.
 */
Drupal.behaviors.autocompleteRue89 = {
  attach: function (context, settings) {
    var ACDBRue89 = [];
    $('input.autocompleteRue89', context).once('autocompleteRue89', function () {
      var uri = this.value;
      if (!ACDBRue89[uri]) {
        ACDBRue89[uri] = new Drupal.ACDBRue89(uri);
      }
      var $input = $('#' + this.id.substr(0, this.id.length - 18))
        .attr('autocomplete', 'OFF')
        .attr('aria-autocomplete', 'list');
      var $input_key = $('#' + this.id.substr(0, this.id.length - 18) + '-key');

      $($input[0].form).submit(Drupal.autocompleteRue89Submit);
      $input.parent().attr('role', 'application');
      new Drupal.jsACRue89($input, $input_key, ACDBRue89[uri]);
    });
  }
};

/**
 * Prevents the form from submitting if the suggestions popup is open
 * and closes the suggestions popup when doing so.
 */
Drupal.autocompleteRue89Submit = function () {
  return $('#autocompleteRue89').each(function () {
    this.owner.hidePopup();
  }).size() == 0;
};

/**
 * An autocompleteRue89 object.
 */
Drupal.jsACRue89 = function ($input, $input_key, db) {
  var ac = this;
  this.input = $input[0];
  this.input_key = $input_key[0];
  this.db = db;

  $input
    .keydown(function (event) { return ac.onkeydown(this, event); })
    .keyup(function (event) { ac.onkeyup(this, event); })
    .blur(function () { ac.hidePopup(); ac.db.cancel(); });

};

/**
 * Handler for the "keydown" event.
 */
Drupal.jsACRue89.prototype.onkeydown = function (input, e) {
  if (!e) {
    e = window.event;
  }
  switch (e.keyCode) {
    case 40: // down arrow.
      this.selectDown();
      return false;
    case 38: // up arrow.
      this.selectUp();
      return false;
    default: // All other keys.
      return true;
  }
};

/**
 * Handler for the "keyup" event.
 */
Drupal.jsACRue89.prototype.onkeyup = function (input, e) {
  if (!e) {
    e = window.event;
  }
  switch (e.keyCode) {
    case 16: // Shift.
    case 17: // Ctrl.
    case 18: // Alt.
    case 20: // Caps lock.
    case 33: // Page up.
    case 34: // Page down.
    case 35: // End.
    case 36: // Home.
    case 37: // Left arrow.
    case 38: // Up arrow.
    case 39: // Right arrow.
    case 40: // Down arrow.
      return true;

    case 9:  // Tab.
    case 13: // Enter.
    case 27: // Esc.
      this.hidePopup(e.keyCode);
      return true;

    default: // All other keys.
      if (input.value.length > 0)
        this.populatePopup();
      else
        this.hidePopup(e.keyCode);
      return true;
  }
};

/**
 * Puts the currently highlighted suggestion into the autocompleteRue89 field.
 */
Drupal.jsACRue89.prototype.select = function (node) {
  this.input.value = $(node).data('autocompleteRue89Value');
  this.input_key.value = $(node).data('autocompleteRue89Key');
};

/**
 * Highlights the next suggestion.
 */
Drupal.jsACRue89.prototype.selectDown = function () {
  if (this.selected && this.selected.nextSibling) {
    this.highlight(this.selected.nextSibling);
  }
  else if (this.popup) {
    var lis = $('li', this.popup);
    if (lis.size() > 0) {
      this.highlight(lis.get(0));
    }
  }
};

/**
 * Highlights the previous suggestion.
 */
Drupal.jsACRue89.prototype.selectUp = function () {
  if (this.selected && this.selected.previousSibling) {
    this.highlight(this.selected.previousSibling);
  }
};

/**
 * Highlights a suggestion.
 */
Drupal.jsACRue89.prototype.highlight = function (node) {
  if (this.selected) {
    $(this.selected).removeClass('selected');
  }
  $(node).addClass('selected');
  this.selected = node;
};

/**
 * Unhighlights a suggestion.
 */
Drupal.jsACRue89.prototype.unhighlight = function (node) {
  $(node).removeClass('selected');
  this.selected = false;
};

/**
 * Hides the autocompleteRue89 suggestions.
 */
Drupal.jsACRue89.prototype.hidePopup = function (keycode) {
  // Select item if the right key or mousebutton was pressed.
  if (this.selected && ((keycode && keycode != 46 && keycode != 8 && keycode != 27) || !keycode)) {
    this.input.value = $(this.selected).data('autocompleteRue89Value');
    this.input_key.value = $(this.selected).data('autocompleteRue89Key');
  }
  // Hide popup.
  var popup = this.popup;
  if (popup) {
    this.popup = null;
    $(popup).fadeOut('fast', function () { $(popup).remove(); });
  }
  this.selected = false;
};

/**
 * Positions the suggestions popup and starts a search.
 */
Drupal.jsACRue89.prototype.populatePopup = function () {
  this.input_key.value = '';
  var $input = $(this.input);
  var position = $input.position();
  // Show popup.
  if (this.popup) {
    $(this.popup).remove();
  }
  this.selected = false;
  this.popup = $('<div id="autocompleteRue89"></div>')[0];
  this.popup.owner = this;
  $(this.popup).css({
    top: parseInt(position.top + this.input.offsetHeight, 10) + 'px',
    left: parseInt(position.left, 10) + 'px',
    width: $input.innerWidth() + 'px',
    display: 'none'
  });
  $input.before(this.popup);

  // Do search.
  this.db.owner = this;
  this.db.search(this.input.value);
};

/**
 * Fills the suggestion popup with any matches received.
 */
Drupal.jsACRue89.prototype.found = function (matches) {
  // If no value in the textfield, do not show the popup.
  if (!this.input.value.length) {
    return false;
  }

  // Prepare matches.
  var ul = $('<ul></ul>');
  var ac = this;
  for (key in matches) {
    $('<li></li>')
      .html($('<div></div>').html(matches[key]))
      .mousedown(function () { ac.select(this); })
      .mouseover(function () { ac.highlight(this); })
      .mouseout(function () { ac.unhighlight(this); })
      .data('autocompleteRue89Value', matches[key])
      .data('autocompleteRue89Key', key)
      .appendTo(ul);
  }

  // Show popup with matches, if any.
  if (this.popup) {
    if (ul.children().size()) {
      $(this.popup).empty().append(ul).show();
    }
    else {
      $(this.popup).css({ visibility: 'hidden' });
      this.hidePopup();
    }
  }
};

Drupal.jsACRue89.prototype.setStatus = function (status) {
  switch (status) {
    case 'begin':
      $(this.input).addClass('throbbing');
      break;
    case 'cancel':
    case 'error':
    case 'found':
      $(this.input).removeClass('throbbing');
      break;
  }
};

/**
 * An autocompleteRue89 DataBase object.
 */
Drupal.ACDBRue89 = function (uri) {
  this.uri = uri;
  this.delay = 300;
  this.cache = {};
};

/**
 * Performs a cached and delayed search.
 */
Drupal.ACDBRue89.prototype.search = function (searchString) {
  var db = this;
  this.searchString = searchString;

  // See if this string needs to be searched for anyway.
  searchString = searchString.replace(/^\s+|\s+$/, '');
  if (searchString.length <= 0 ||
    searchString.charAt(searchString.length - 1) == ',') {
    return;
  }

  // See if this key has been searched for before.
  if (this.cache[searchString]) {
    return this.owner.found(this.cache[searchString]);
  }

  // Initiate delayed search.
  if (this.timer) {
    clearTimeout(this.timer);
  }
  this.timer = setTimeout(function () {
    db.owner.setStatus('begin');

    // Ajax GET request for autocompletion.
    $.ajax({
      type: 'GET',
      url: db.uri + '/' + encodeURIComponent(searchString),
      dataType: 'json',
      success: function (matches) {
        if (typeof matches.status == 'undefined' || matches.status != 0) {
          db.cache[searchString] = matches;
          // Verify if these are still the matches the user wants to see.
          if (db.searchString == searchString) {
            db.owner.found(matches);
          }
          db.owner.setStatus('found');
        }
      },
      error: function (xmlhttp) {
        alert(Drupal.ajaxError(xmlhttp, db.uri));
      }
    });
  }, this.delay);
};

/**
 * Cancels the current autocompleteRue89 request.
 */
Drupal.ACDBRue89.prototype.cancel = function () {
  if (this.owner) this.owner.setStatus('cancel');
  if (this.timer) clearTimeout(this.timer);
  this.searchString = '';
};

})(jQuery);;

/*!
 * jQuery Form Plugin
 * version: 2.52 (07-DEC-2010)
 * @requires jQuery v1.3.2 or later
 *
 * Examples and documentation at: http://malsup.com/jquery/form/
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */
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