views_handler_field_node_revision.inc

<?php


/**
 * @file
 * Definition of views_handler_field_node_revision.
 */

/**
 * Contains the basic 'node_revision' field handler.
 *
 * @ingroup views_field_handlers
 */
class views_handler_field_node_revision extends views_handler_field_node {
    
    /**
     * {@inheritdoc}
     */
    public function init(&$view, &$options) {
        parent::init($view, $options);
        if (!empty($this->options['link_to_node_revision'])) {
            $this->additional_fields['vid'] = 'vid';
            $this->additional_fields['nid'] = 'nid';
            if (module_exists('translation')) {
                $this->additional_fields['language'] = array(
                    'table' => 'node',
                    'field' => 'language',
                );
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function option_definition() {
        $options = parent::option_definition();
        $options['link_to_node_revision'] = array(
            'default' => FALSE,
            'bool' => TRUE,
        );
        return $options;
    }
    
    /**
     * Provide link to revision option.
     */
    public function options_form(&$form, &$form_state) {
        $form['link_to_node_revision'] = array(
            '#title' => t('Link this field to its content revision'),
            '#description' => t('This will override any other link you have set.'),
            '#type' => 'checkbox',
            '#default_value' => !empty($this->options['link_to_node_revision']),
        );
        parent::options_form($form, $form_state);
    }
    
    /**
     * Render whatever the data is as a link to the node.
     *
     * Data should be made XSS safe prior to calling this function.
     */
    public function render_link($data, $values) {
        if (!empty($this->options['link_to_node_revision']) && $data !== NULL && $data !== '') {
            $this->options['alter']['make_link'] = TRUE;
            $nid = $this->get_value($values, 'nid');
            $vid = $this->get_value($values, 'vid');
            $this->options['alter']['path'] = 'node/' . $nid;
            if ($nid != $vid) {
                $this->options['alter']['path'] .= "/revisions/{$vid}/view";
            }
            if (module_exists('translation')) {
                $language = $this->get_value($values, 'language');
                $languages = language_list();
                if (isset($languages[$language])) {
                    $this->options['alter']['language'] = $languages[$language];
                }
            }
        }
        else {
            return parent::render_link($data, $values);
        }
        return $data;
    }

}