Club Drupal

// Registers the rules namespace.

Drupal.rules = Drupal.rules || {};

(function($) {

  Drupal.behaviors.rules_autocomplete = {

    attach: function(context) {

      var autocomplete_settings = Drupal.settings.rules_autocomplete;

      $('input.rules-autocomplete').once(function() {

        var input = this;

        new Drupal.rules.autocomplete(input, autocomplete_settings[$(input).attr('id')]);

      });

    }

  };

  /**

   * Rules autocomplete object.

   */

  Drupal.rules.autocomplete = function(input, settings) {

    this.id = settings.inputId;

    this.uri = settings.source;

    this.jqObject = $('#' + this.id);

    this.cache = new Array();

    this.jqObject.addClass('ui-corner-left');

    this.opendByFocus = false;

    this.focusOpens = true;

    this.groupSelected = false;

    this.button = $('<span>&nbsp;</span>');

    this.button.attr( {

      'tabIndex': -1,

      'title': 'Show all items'

    });

    this.button.insertAfter(this.jqObject);

    this.button.button( {

      icons: {

        primary: 'ui-icon-triangle-1-s'

      },

      text: false

    });

    // Don't round the left corners.

    this.button.removeClass('ui-corner-all');

    this.button.addClass('ui-corner-right ui-button-icon rules-autocomplete-button');

    this.jqObject.autocomplete();

    this.jqObject.autocomplete("option", "minLength", 0);

    // Add a custom class, so we can style the autocomplete box without

    // interfering with other jquery autocomplete widgets.

    this.jqObject.autocomplete("widget").addClass('rules-autocomplete');

    // Save the current rules_autocomplete object, so it can be used in

    // handlers.

    var instance = this;

    // Event handlers

    this.jqObject.focus(function() {

      if (instance.focusOpens) {

        instance.toggle();

        instance.opendByFocus = true;

      }

      else {

        instance.focusOpens = true;

      }

    });

    // Needed when the window is closed but the textfield has the focus.

    this.jqObject.click(function() {

      // Since the focus event happens earlier then the focus event, we need to

      // check here, if the window should be opened.

      if (!instance.opendByFocus) {

        instance.toggle();

      }

      else {

        instance.opendByFocus = false;

      }

    });

    this.jqObject.bind("autocompleteselect", function(event, ui) {

      // If a group was selected then set the groupSelected to true for the

      // overridden close function from jquery autocomplete.

      if (ui.item.value.substring(ui.item.value.length - 1, ui.item.value.length) == ":") {

        instance.groupSelected = true;

      }

      instance.focusOpens = false;

      instance.opendByFocus = false;

    });

    this.jqObject.autocomplete("option", "source", function(request, response) {

      if (request.term in instance.cache) {

        response(instance.cache[request.term]);

        return;

      }

      $.ajax( {

        url: instance.uri + '/' + request.term,

        dataType: "json",

        success: function(data) {

          instance.success(data, request, response);

        }

      });

    });

    // Newer versions of jQuery UI use element.data('ui-autocomplete'), older

    // versions use element.data('autocomplete').

    var autocompleteDataKey = typeof(this.jqObject.data('autocomplete')) === 'object' ? 'autocomplete' : 'ui-autocomplete';

    // Since jquery autocomplete by default strips html text by using .text()

    // we need our own _renderItem function to display html content.

    this.jqObject.data(autocompleteDataKey)._renderItem = function(ul, item) {

      return $("<li></li>").data("item.autocomplete", item).append("<a>" + item.label + "</a>").appendTo(ul);

    };

    // Override close function

    this.jqObject.data(autocompleteDataKey).close = function (event) {

      var value = this.element.val();

      // If the selector is not a group, then trigger the close event an and

      // hide the menu.

      if (value === undefined || instance.groupSelected === false) {

        clearTimeout(this.closing);

        if (this.menu.element.is(":visible")) {

          this._trigger("close", event);

          this.menu.element.hide();

          // Use deactivate for older versions of jQuery UI.

          if (typeof(this.menu.deactivate) === 'function') {

            this.menu.deactivate();

          }

        }

      }

      else {

        // Else keep all open and trigger a search for the group.

        instance.jqObject.autocomplete("search", instance.jqObject.val());

        // After the suggestion box was opened again, we want to be able to

        // close it.

        instance.groupSelected = false;

      }

    };

    this.button.click(function() {

      instance.toggle();

    });

  };

  /**

   * Success function for Rules autocomplete object.

   */

  Drupal.rules.autocomplete.prototype.success = function(data, request, response) {

    var list = new Array();

    jQuery.each(data, function(index, value) {

      list.push( {

        label: value,

        value: index

      });

    });

    this.cache[request.term] = list;

    response(list);

  };

  /**

   * Open the autocomplete window.

   * @param searchFor The term for will be searched for. If undefined then the

   *                  entered input text will be used.

   */

  Drupal.rules.autocomplete.prototype.open = function(searchFor) {

    // If searchFor is undefined, we want to search for the passed argument.

    this.jqObject.autocomplete("search", ((searchFor === undefined) ? this.jqObject.val() : searchFor));

    this.button.addClass("ui-state-focus");

  };

  /**

   * Close the autocomplete window.

   */

  Drupal.rules.autocomplete.prototype.close = function() {

    this.jqObject.autocomplete("close");

    this.button.removeClass("ui-state-focus");

  };

  /**

   * Toggle the autocomplete window.

   */

  Drupal.rules.autocomplete.prototype.toggle = function() {

    if (this.jqObject.autocomplete("widget").is(":visible")) {

      this.close();

      this.focusOpens = true;

    }

    else {

      var groups = this.jqObject.val().split(":");

      var selector = "";

      for (var i=0; i<groups.length-1; i++) {

        selector = selector.concat(groups[i]) + ":";

      }

      this.focusOpens = false;

      this.jqObject.focus();

      this.open(selector);

    }

  };

})(jQuery);