Club Drupal

(function ($) {

/**

 * Attaches the autocomplete behavior to all required fields.

 */

Drupal.behaviors.autocomplete = {

  attach: function (context) {

    var $context = $(context);

    var acdb = [];

    $context.find('input.autocomplete').once('autocomplete', function () {

      var uri = this.value;

      if (!acdb[uri]) {

        acdb[uri] = new Drupal.ACDB(uri);

      }

      var $input = $context.find('#' + this.id.substr(0, this.id.length - 13))

        .attr('autocomplete', 'OFF')

        .attr('aria-autocomplete', 'list');

      $context.find($input[0].form).submit(Drupal.autocompleteSubmit);

      $input.parents('.form-item')

        .attr('role', 'application')

        .append($('<span class="element-invisible" aria-live="assertive"></span>')

          .attr('id', $input.attr('id') + '-autocomplete-aria-live')

      );

      new Drupal.jsAC($input, acdb[uri], $context);

    });

  }

};

/**

 * Prevents the form from submitting if the suggestions popup is open

 * and closes the suggestions popup when doing so.

 */

Drupal.autocompleteSubmit = function () {

  return $('.form-autocomplete > .dropdown').each(function () {

    this.owner.hidePopup();

  }).length == 0;

};

/**

 * Highlights a suggestion.

 */

Drupal.jsAC.prototype.highlight = function (node) {

  if (this.selected) {

    $(this.selected).removeClass('active');

  }

  $(node).addClass('active');

  this.selected = node;

  $(this.ariaLive).html($(this.selected).html());

};

/**

 * Unhighlights a suggestion.

 */

Drupal.jsAC.prototype.unhighlight = function (node) {

  $(node).removeClass('active');

  this.selected = false;

  $(this.ariaLive).empty();

};

/**

 * Positions the suggestions popup and starts a search.

 */

Drupal.jsAC.prototype.populatePopup = function () {

  var $input = $(this.input);

  // Show popup.

  if (this.popup) {

    $(this.popup).remove();

  }

  this.selected = false;

  this.popup = $('<div class="dropdown"></div>')[0];

  this.popup.owner = this;

  $input.parent().after(this.popup);

  // Do search.

  this.db.owner = this;

  this.db.search(this.input.value);

};

/**

 * Fills the suggestion popup with any matches received.

 */

Drupal.jsAC.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 class="dropdown-menu"></ul>');

  var ac = this;

  ul.css({

    display: 'block',

    right: 0

  });

  for (var key in matches) {

    $('<li></li>')

      .html($('<a href="#"></a>').html(matches[key]).on('click', function (e) { e.preventDefault(); }))

      .on('mousedown', function () { ac.hidePopup(this); })

      .on('mouseover', function () { ac.highlight(this); })

      .on('mouseout', function () { ac.unhighlight(this); })

      .data('autocompleteValue', key)

      .appendTo(ul);

  }

  // Show popup with matches, if any.

  if (this.popup) {

    if (ul.children().length) {

      $(this.popup).empty().append(ul).show();

      $(this.ariaLive).html(Drupal.t('Autocomplete popup'));

    }

    else {

      $(this.popup).css({ visibility: 'hidden' });

      this.hidePopup();

    }

  }

};

Drupal.jsAC.prototype.setStatus = function (status) {

  var $throbber = $(this.input).parent().find('.glyphicon-refresh, .autocomplete-throbber').first();

  var throbbingClass = $throbber.is('.autocomplete-throbber') ? 'throbbing' : 'glyphicon-spin';

  switch (status) {

    case 'begin':

      $throbber.addClass(throbbingClass);

      $(this.ariaLive).html(Drupal.t('Searching for matches...'));

      break;

    case 'cancel':

    case 'error':

    case 'found':

      $throbber.removeClass(throbbingClass);

      break;

  }

};

// Save the previous autocomplete prototype.

var oldPrototype = Drupal.jsAC.prototype;

/**

 * Override the autocomplete constructor.

 */

Drupal.jsAC = function ($input, db, context) {

  var ac = this;

  // Context is normally passed by Drupal.behaviors.autocomplete above. However,

  // if a module has manually invoked this method they will likely not know

  // about this feature and a global fallback context to document must be used.

  // @see https://www.drupal.org/node/2594243

  // @see https://www.drupal.org/node/2315295

  this.$context = context && $(context) || $(document);

  this.input = $input[0];

  this.ariaLive = this.$context.find('#' + this.input.id + '-autocomplete-aria-live');

  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(); });

};

// Restore the previous prototype.

Drupal.jsAC.prototype = oldPrototype;

})(jQuery);