class views_plugin_argument_default_taxonomy_tid

class views_plugin_argument_default_taxonomy_tid extends views_plugin_argument_default {
    
    /**
     * {@inheritdoc}
     */
    public function init(&$view, &$argument, $options) {
        parent::init($view, $argument, $options);
        // Convert legacy vids option to machine name vocabularies.
        if (!empty($this->options['vids'])) {
            $vocabularies = taxonomy_get_vocabularies();
            foreach ($this->options['vids'] as $vid) {
                if (isset($vocabularies[$vid], $vocabularies[$vid]->machine_name)) {
                    $this->options['vocabularies'][$vocabularies[$vid]->machine_name] = $vocabularies[$vid]->machine_name;
                }
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function option_definition() {
        $options = parent::option_definition();
        $options['term_page'] = array(
            'default' => TRUE,
            'bool' => TRUE,
        );
        $options['node'] = array(
            'default' => FALSE,
            'bool' => TRUE,
        );
        $options['anyall'] = array(
            'default' => ',',
        );
        $options['limit'] = array(
            'default' => FALSE,
            'bool' => TRUE,
        );
        $options['vocabularies'] = array(
            'default' => array(),
        );
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function options_form(&$form, &$form_state) {
        $form['term_page'] = array(
            '#type' => 'checkbox',
            '#title' => t('Load default filter from term page'),
            '#default_value' => $this->options['term_page'],
        );
        $form['node'] = array(
            '#type' => 'checkbox',
            '#title' => t('Load default filter from node page, that\'s good for related taxonomy blocks'),
            '#default_value' => $this->options['node'],
        );
        $form['limit'] = array(
            '#type' => 'checkbox',
            '#title' => t('Limit terms by vocabulary'),
            '#default_value' => $this->options['limit'],
            '#process' => array(
                'form_process_checkbox',
                'ctools_dependent_process',
            ),
            '#dependency' => array(
                'edit-options-argument-default-taxonomy-tid-node' => array(
                    1,
                ),
            ),
        );
        $options = array();
        $vocabularies = taxonomy_get_vocabularies();
        foreach ($vocabularies as $voc) {
            $options[$voc->machine_name] = check_plain($voc->name);
        }
        $form['vocabularies'] = array(
            '#prefix' => '<div><div id="edit-options-vids">',
            '#suffix' => '</div></div>',
            '#type' => 'checkboxes',
            '#title' => t('Vocabularies'),
            '#options' => $options,
            '#default_value' => $this->options['vocabularies'],
            '#process' => array(
                'form_process_checkboxes',
                'ctools_dependent_process',
            ),
            '#dependency' => array(
                'edit-options-argument-default-taxonomy-tid-limit' => array(
                    1,
                ),
                'edit-options-argument-default-taxonomy-tid-node' => array(
                    1,
                ),
            ),
        );
        $form['anyall'] = array(
            '#type' => 'radios',
            '#title' => t('Multiple-value handling'),
            '#default_value' => $this->options['anyall'],
            '#process' => array(
                'form_process_radios',
                'ctools_dependent_process',
            ),
            '#options' => array(
                ',' => t('Filter to items that share all terms'),
                '+' => t('Filter to items that share any term'),
            ),
            '#dependency' => array(
                'edit-options-argument-default-taxonomy-tid-node' => array(
                    1,
                ),
            ),
        );
    }
    
    /**
     * {@inheritdoc}
     */
    public function options_submit(&$form, &$form_state, &$options = array()) {
        // Filter unselected items so we don't unnecessarily store giant arrays.
        $options['vocabularies'] = array_filter($options['vocabularies']);
    }
    
    /**
     * {@inheritdoc}
     */
    public function get_argument() {
        // Load default argument from taxonomy page.
        if (!empty($this->options['term_page'])) {
            if (arg(0) == 'taxonomy' && arg(1) == 'term' && is_numeric(arg(2))) {
                return arg(2);
            }
        }
        // Load default argument from node.
        if (!empty($this->options['node'])) {
            foreach (range(1, 3) as $i) {
                $node = menu_get_object('node', $i);
                if (!empty($node)) {
                    break;
                }
            }
            // Just check, if a node could be detected.
            if ($node) {
                $taxonomy = array();
                $fields = field_info_instances('node', $node->type);
                foreach ($fields as $name => $info) {
                    $field_info = field_info_field($name);
                    if ($field_info['type'] == 'taxonomy_term_reference') {
                        $items = field_get_items('node', $node, $name);
                        if (is_array($items)) {
                            foreach ($items as $item) {
                                $taxonomy[$item['tid']] = $field_info['settings']['allowed_values'][0]['vocabulary'];
                            }
                        }
                    }
                }
                if (!empty($this->options['limit'])) {
                    $tids = array();
                    // Filter by vocabulary.
                    foreach ($taxonomy as $tid => $vocab) {
                        if (!empty($this->options['vocabularies'][$vocab])) {
                            $tids[] = $tid;
                        }
                    }
                    return implode($this->options['anyall'], $tids);
                }
                else {
                    return implode($this->options['anyall'], array_keys($taxonomy));
                }
            }
        }
        // If the current page is a view that takes tid as an argument,
        // find the tid argument and return it.
        $views_page = views_get_page_view();
        if ($views_page && isset($views_page->argument['tid'])) {
            return $views_page->argument['tid']->argument;
        }
    }

}