Mercurial > hg > isophonics-drupal-site
annotate core/lib/Drupal/Core/Template/AttributeBoolean.php @ 19:fa3358dc1485 tip
Add ndrum files
author | Chris Cannam |
---|---|
date | Wed, 28 Aug 2019 13:14:47 +0100 |
parents | 4c8ae668cc8c |
children |
rev | line source |
---|---|
Chris@0 | 1 <?php |
Chris@0 | 2 |
Chris@0 | 3 namespace Drupal\Core\Template; |
Chris@0 | 4 |
Chris@0 | 5 use Drupal\Component\Utility\Html; |
Chris@0 | 6 |
Chris@0 | 7 /** |
Chris@0 | 8 * A class that defines a type of boolean HTML attribute. |
Chris@0 | 9 * |
Chris@0 | 10 * Boolean HTML attributes are not attributes with values of TRUE/FALSE. |
Chris@0 | 11 * They are attributes that if they exist in the tag, they are TRUE. |
Chris@0 | 12 * Examples include selected, disabled, checked, readonly. |
Chris@0 | 13 * |
Chris@0 | 14 * To set a boolean attribute on the Attribute class, set it to TRUE. |
Chris@0 | 15 * @code |
Chris@0 | 16 * $attributes = new Attribute(); |
Chris@0 | 17 * $attributes['disabled'] = TRUE; |
Chris@0 | 18 * echo '<select' . $attributes . '/>'; |
Chris@0 | 19 * // produces <select disabled>; |
Chris@0 | 20 * $attributes['disabled'] = FALSE; |
Chris@0 | 21 * echo '<select' . $attributes . '/>'; |
Chris@0 | 22 * // produces <select>; |
Chris@0 | 23 * @endcode |
Chris@0 | 24 * |
Chris@0 | 25 * @see \Drupal\Core\Template\Attribute |
Chris@0 | 26 */ |
Chris@0 | 27 class AttributeBoolean extends AttributeValueBase { |
Chris@0 | 28 |
Chris@0 | 29 /** |
Chris@0 | 30 * {@inheritdoc} |
Chris@0 | 31 */ |
Chris@0 | 32 public function render() { |
Chris@0 | 33 return $this->__toString(); |
Chris@0 | 34 } |
Chris@0 | 35 |
Chris@0 | 36 /** |
Chris@0 | 37 * Implements the magic __toString() method. |
Chris@0 | 38 */ |
Chris@0 | 39 public function __toString() { |
Chris@0 | 40 return $this->value === FALSE ? '' : Html::escape($this->name); |
Chris@0 | 41 } |
Chris@0 | 42 |
Chris@0 | 43 } |