Lookup.php

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<?php

namespace Rsi\Fred\Controller\View\Html\Widget;

class Lookup extends Char{

  protected $_listId = null;

  protected function attribs(){
    return parent::attribs() + ['list' => $this->listId];
  }

  protected function container($content,$display){
    if($this->listId){
      if(!is_array($options = $this->_widget->options)) $options = array_column(
        $this->_widget->provider->search([],[],$this->_widget->params,0,$this->_widget->batchSize),
        $this->_widget->code
      );
      $content .= $this->html->datalist($options,null,$this->listId);
    }
    return parent::container($content,$display);
  }

  protected function getListId(){
    if($this->_listId === null) $this->_listId = $this->_widget->options && ($this->_widget->display >= \Rsi\Fred\Controller\Widget::DISPLAY_WRITEABLE) ? 'list-' . $this->_id : false;
    return $this->_listId;
  }

}