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   1  <?php
   2  /**
   3   * @file
   4   * Contains the RSS style plugin.
   5   */
   6  
   7  /**
   8   * Default style plugin to render an RSS feed.
   9   *
  10   * @ingroup views_style_plugins
  11   */
  12  class views_plugin_style_rss extends views_plugin_style {
  13    function attach_to($display_id, $path, $title) {
  14      $display = $this->view->display[$display_id]->handler;
  15      $url_options = array();
  16      $input = $this->view->get_exposed_input();
  17      if ($input) {
  18        $url_options['query'] = $input;
  19      }
  20  
  21      $url = url($this->view->get_url(NULL, $path), $url_options);
  22      if ($display->has_path()) {
  23        if (empty($this->preview)) {
  24          drupal_add_feed($url, $title);
  25        }
  26      }
  27      else {
  28        if (empty($this->view->feed_icon)) {
  29          $this->view->feed_icon = '';
  30        }
  31  
  32        $this->view->feed_icon .= theme('feed_icon', $url, $title);
  33        drupal_add_link(array(
  34          'rel' => 'alternate',
  35          'type' => 'application/rss+xml',
  36          'title' => $title,
  37          'href' => $url
  38        ));
  39      }
  40    }
  41  
  42    function option_definition() {
  43      $options = parent::option_definition();
  44  
  45      $options['description'] = array('default' => '', 'translatable' => TRUE);
  46      $options['mission_description'] = array('default' => '', 'translatable' => TRUE);
  47  
  48      return $options;
  49    }
  50  
  51    function options_form(&$form, &$form_state) {
  52      parent::options_form($form, $form_state);
  53  
  54      $form['mission_description'] = array(
  55        '#type' => 'checkbox',
  56        '#default_value' => !empty($this->options['mission_description']),
  57        '#title' => t('Use the site mission for the description'),
  58      );
  59      $form['description'] = array(
  60        '#type' => 'textfield',
  61        '#title' => t('RSS description'),
  62        '#default_value' => $this->options['description'],
  63        '#description' => t('This will appear in the RSS feed itself.'),
  64        '#process' => array('views_process_dependency'),
  65        '#dependency' => array('edit-style-options-override' => array(FALSE)),
  66      );
  67    }
  68  
  69    /**
  70     * Return an array of additional XHTML elements to add to the channel.
  71     *
  72     * @return
  73     *   An array that can be passed to format_xml_elements().
  74     */
  75    function get_channel_elements() {
  76      return array();
  77    }
  78  
  79    function render() {
  80      if (empty($this->row_plugin)) {
  81        vpr('views_plugin_style_default: Missing row plugin');
  82        return;
  83      }
  84      $rows = '';
  85  
  86      // This will be filled in by the row plugin and is used later on in the
  87      // theming output.
  88      $this->namespaces = array();
  89  
  90      // Fetch any additional elements for the channel and merge in their
  91      // namespaces.
  92      $this->channel_elements = $this->get_channel_elements();
  93      foreach ($this->channel_elements as $element) {
  94        if (isset($element['namespace'])) {
  95          $this->namespaces = array_merge($this->namespaces, $element['namespace']);
  96        }
  97      }
  98  
  99      foreach ($this->view->result as $row_index => $row) {
 100        $this->view->row_index = $row_index;
 101        $rows .= $this->row_plugin->render($row);
 102      }
 103  
 104      $output = theme($this->theme_functions(), $this->view, $this->options, $rows);
 105      unset($this->view->row_index);
 106  
 107      return $output;
 108    }
 109  }