crm.fsf.org/20131203/files/sites/all/modules-new/views/modules/node/views_handler_field_node_revision_link.inc

   1 <?php
   2
   3 /**
   4  * @file
   5  * Definition of views_handler_field_node_revision_link.
   6  */
   7
   8 /**
   9  * Field handler to present a link to a node revision.
  10  *
  11  * @ingroup views_field_handlers
  12  */
  13 class views_handler_field_node_revision_link extends views_handler_field_node_link {
  14
  15   function construct() {
  16     parent::construct();
  17     $this->additional_fields['node_vid'] = array('table' => 'node_revision', 'field' => 'vid');
  18   }
  19
  20   function access() {
  21     return user_access('view revisions') || user_access('administer nodes');
  22   }
  23
  24   function render_link($data, $values) {
  25     list($node, $vid) = $this->get_revision_entity($values, 'view');
  26     if (!isset($vid)) {
  27       return;
  28     }
  29
  30     // Current revision uses the node view path.
  31     $path = 'node/' . $node->nid;
  32     if ($node->vid != $vid) {
  33       $path .= "/revisions/$vid/view";
  34     }
  35
  36     $this->options['alter']['make_link'] = TRUE;
  37     $this->options['alter']['path'] = $path;
  38     $this->options['alter']['query'] = drupal_get_destination();
  39
  40     return !empty($this->options['text']) ? $this->options['text'] : t('view');
  41   }
  42
  43   /**
  44    * Returns the revision values of a node.
  45    *
  46    * @param object $values
  47    *   An object containing all retrieved values.
  48    * @param string $op
  49    *   The operation being performed.
  50    *
  51    * @return array
  52    *   A numerically indexed array containing the current node object and the
  53    *   revision ID for this row.
  54    */
  55   function get_revision_entity($values, $op) {
  56     $vid = $this->get_value($values, 'node_vid');
  57     $node = $this->get_value($values);
  58     // Unpublished nodes ignore access control.
  59     $node->status = 1;
  60     // Ensure user has access to perform the operation on this node.
  61     if (!node_access($op, $node)) {
  62       return array($node, NULL);
  63     }
  64     return array($node, $vid);
  65   }
  66 }