Club Drupal

/**

 * @file

 * Handles AJAX fetching of views, including filter submission and response.

 */

(function ($) {

  /**

   * Attaches the AJAX behavior to exposed filter forms and key views links.

   */

  Drupal.behaviors.ViewsAjaxView = {};

  Drupal.behaviors.ViewsAjaxView.attach = function() {

    if (Drupal.settings && Drupal.settings.views && Drupal.settings.views.ajaxViews) {

      $.each(Drupal.settings.views.ajaxViews, function(i, settings) {

        Drupal.views.instances[i] = new Drupal.views.ajaxView(settings);

      });

    }

  };

  Drupal.views = {};

  Drupal.views.instances = {};

  /**

   * JavaScript object for a certain view.

   */

  Drupal.views.ajaxView = function(settings) {

    var selector = '.view-dom-id-' + settings.view_dom_id;

    this.$view = $(selector);

    // Retrieve the path to use for views' ajax.

    var ajax_path = Drupal.settings.views.ajax_path;

    // If there are multiple views this might've ended up showing up multiple

    // times.

    if (ajax_path.constructor.toString().indexOf("Array") != -1) {

      ajax_path = ajax_path[0];

    }

    // Check if there are any GET parameters to send to views.

    var queryString = window.location.search || '';

    if (queryString !== '') {

      // Remove the question mark and Drupal path component if any.

      var queryString = queryString.slice(1).replace(/q=[^&]+&?|&?render=[^&]+/, '');

      if (queryString !== '') {

        // If there is a '?' in ajax_path, clean url are on and & should be

        // used to add parameters.

        queryString = ((/\?/.test(ajax_path)) ? '&' : '?') + queryString;

      }

    }

    this.element_settings = {

      url: ajax_path + queryString,

      submit: settings,

      setClick: true,

      event: 'click',

      selector: selector,

      progress: {

        type: 'throbber'

      }

    };

    this.settings = settings;

    // Add the ajax to exposed forms.

    this.$exposed_form = $('#views-exposed-form-' + settings.view_name.replace(/_/g, '-') + '-' + settings.view_display_id.replace(/_/g, '-'));

    this.$exposed_form.once(jQuery.proxy(this.attachExposedFormAjax, this));

    // Store Drupal.ajax objects here for all pager links.

    this.links = [];

    // Add the ajax to pagers.

    this.$view

      .once(jQuery.proxy(this.attachPagerAjax, this));

    // Add a trigger to update this view specifically. In order to trigger a

    // refresh use the following code.

    //

    // @code

    // jQuery('.view-name').trigger('RefreshView');

    // @endcode

    // Add a trigger to update this view specifically.

    var self_settings = this.element_settings;

    self_settings.event = 'RefreshView';

    var self = this;

    this.$view.once('refresh', function () {

      self.refreshViewAjax = new Drupal.ajax(self.selector, self.$view, self_settings);

    });

  };

  Drupal.views.ajaxView.prototype.attachExposedFormAjax = function() {

    var button = $('input[type=submit], button[type=submit], input[type=image]', this.$exposed_form);

    button = button[0];

    // Call the autocomplete submit before doing AJAX.

    $(button).click(function () {

      if (Drupal.autocompleteSubmit) {

        Drupal.autocompleteSubmit();

      }

    });

    this.exposedFormAjax = new Drupal.ajax($(button).attr('id'), button, this.element_settings);

  };

  /**

   * Attach the ajax behavior to each link.

   */

  Drupal.views.ajaxView.prototype.attachPagerAjax = function() {

    this.$view.find('ul.pager > li > a, ol.pager > li > a, th.views-field a, .attachment .views-summary a')

      .each(jQuery.proxy(this.attachPagerLinkAjax, this));

  };

  /**

   * Attach the ajax behavior to a single link.

   */

  Drupal.views.ajaxView.prototype.attachPagerLinkAjax = function(id, link) {

    var $link = $(link);

    var viewData = {};

    var href = $link.attr('href');

    // Don't attach to pagers inside nested views.

    if ($link.closest('.view')[0] !== this.$view[0] &&

      $link.closest('.view').parent().hasClass('attachment') === false) {

      return;

    }

    // Provide a default page if none has been set. This must be done

    // prior to merging with settings to avoid accidentally using the

    // page landed on instead of page 1.

    if (typeof(viewData.page) === 'undefined') {

      viewData.page = 0;

    }

    // Construct an object using the settings defaults and then overriding

    // with data specific to the link.

    $.extend(

      viewData,

      this.settings,

      Drupal.Views.parseQueryString(href),

      // Extract argument data from the URL.

      Drupal.Views.parseViewArgs(href, this.settings.view_base_path)

    );

    // For anchor tags, these will go to the target of the anchor rather

    // than the usual location.

    $.extend(viewData, Drupal.Views.parseViewArgs(href, this.settings.view_base_path));

    this.element_settings.submit = viewData;

    this.pagerAjax = new Drupal.ajax(false, $link, this.element_settings);

    this.links.push(this.pagerAjax);

  };

  Drupal.ajax.prototype.commands.viewsScrollTop = function (ajax, response, status) {

    // Scroll to the top of the view. This will allow users

    // to browse newly loaded content after e.g. clicking a pager

    // link.

    var offset = $(response.selector).offset();

    // We can't guarantee that the scrollable object should be

    // the body, as the view could be embedded in something

    // more complex such as a modal popup. Recurse up the DOM

    // and scroll the first element that has a non-zero top.

    var scrollTarget = response.selector;

    while ($(scrollTarget).scrollTop() == 0 && $(scrollTarget).parent()) {

      scrollTarget = $(scrollTarget).parent();

    }

    // Only scroll upward.

    if (offset.top - 10 < $(scrollTarget).scrollTop()) {

      $(scrollTarget).animate({scrollTop: (offset.top - 10)}, 500);

    }

  };

})(jQuery);