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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Template\AttributeArray. | |
| */ | |
| namespace Drupal\Core\Template; | |
| use Drupal\Component\Utility\Html; | |
| /** | |
| * A class that defines a type of Attribute that can be added to as an array. | |
| * | |
| * To use with Attribute, the array must be specified. | |
| * Correct: | |
| * @code | |
| * $attributes = new Attribute(); | |
| * $attributes['class'] = array(); | |
| * $attributes['class'][] = 'cat'; | |
| * @endcode | |
| * Incorrect: | |
| * @code | |
| * $attributes = new Attribute(); | |
| * $attributes['class'][] = 'cat'; | |
| * @endcode | |
| * | |
| * @see \Drupal\Core\Template\Attribute | |
| */ | |
| class AttributeArray extends AttributeValueBase implements \ArrayAccess, \IteratorAggregate { | |
| /** | |
| * Ensures empty array as a result of array_filter will not print '$name=""'. | |
| * | |
| * @see \Drupal\Core\Template\AttributeArray::__toString() | |
| * @see \Drupal\Core\Template\AttributeValueBase::render() | |
| */ | |
| const RENDER_EMPTY_ATTRIBUTE = FALSE; | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function offsetGet($offset) { | |
| return $this->value[$offset]; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function offsetSet($offset, $value) { | |
| if (isset($offset)) { | |
| $this->value[$offset] = $value; | |
| } | |
| else { | |
| $this->value[] = $value; | |
| } | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function offsetUnset($offset) { | |
| unset($this->value[$offset]); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function offsetExists($offset) { | |
| return isset($this->value[$offset]); | |
| } | |
| /** | |
| * Implements the magic __toString() method. | |
| */ | |
| public function __toString() { | |
| // Filter out any empty values before printing. | |
| $this->value = array_unique(array_filter($this->value)); | |
| return Html::escape(implode(' ', $this->value)); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getIterator() { | |
| return new \ArrayIterator($this->value); | |
| } | |
| /** | |
| * Exchange the array for another one. | |
| * | |
| * @see ArrayObject::exchangeArray | |
| * | |
| * @param array $input | |
| * The array input to replace the internal value. | |
| * | |
| * @return array | |
| * The old array value. | |
| */ | |
| public function exchangeArray($input) { | |
| $old = $this->value; | |
| $this->value = $input; | |
| return $old; | |
| } | |
| } |