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<?php
/**
* Class AMP_Base_Embed_Handler
*
* Used by some children.
*
* @package AMP
*/
/**
* Class AMP_Base_Embed_Handler
*
* @since 0.2
*/
abstract class AMP_Base_Embed_Handler {
/**
* Default width.
*
* @var int
*/
protected $DEFAULT_WIDTH = 600;
/**
* Default height.
*
* @var int
*/
protected $DEFAULT_HEIGHT = 480;
/**
* Default arguments.
*
* @var array
*/
protected $args = [];
/**
* Whether or not conversion was completed.
*
* @var boolean
*/
protected $did_convert_elements = false;
/**
* Registers embed.
*/
abstract public function register_embed();
/**
* Unregisters embed.
*/
abstract public function unregister_embed();
/**
* Constructor.
*
* @param array $args Height and width for embed.
*/
public function __construct( $args = [] ) {
$this->args = wp_parse_args(
$args,
[
'width' => $this->DEFAULT_WIDTH,
'height' => $this->DEFAULT_HEIGHT,
]
);
}
/**
* Get mapping of AMP component names to AMP script URLs.
*
* This is normally no longer needed because the validating
* sanitizer will automatically detect the need for them via
* the spec.
*
* @see AMP_Tag_And_Attribute_Sanitizer::get_scripts()
* @return array Scripts.
*/
public function get_scripts() {
return [];
}
/**
* Get regex pattern for matching HTML attributes from a given tag name.
*
* @since 1.5.0
*
* @param string $html HTML source haystack.
* @param string $tag_name Tag name.
* @param string[] $attribute_names Attribute names.
* @return string[]|null Matched attributes, or null if the element was not matched at all.
*/
protected function match_element_attributes( $html, $tag_name, $attribute_names ) {
$pattern = sprintf(
'/<%s%s/',
preg_quote( $tag_name, '/' ),
implode(
'',
array_map(
static function ( $attr_name ) {
return sprintf( '(?=[^>]*?%1$s="(?P<%1$s>[^"]+)")?', preg_quote( $attr_name, '/' ) );
},
$attribute_names
)
)
);
if ( ! preg_match( $pattern, $html, $matches ) ) {
return null;
}
return wp_array_slice_assoc( $matches, $attribute_names );
}
/**
* Get all child elements of the specified element.
*
* @since 2.0.6
*
* @param DOMElement $node Element.
* @return DOMElement[] Array of child elements for specified element.
*/
protected function get_child_elements( DOMElement $node ) {
return array_filter(
iterator_to_array( $node->childNodes ),
static function ( DOMNode $child ) {
return $child instanceof DOMElement;
}
);
}
/**
* Replace an element's parent with itself if the parent is a <p> tag which has no attributes and has no other children.
*
* This usually happens while `wpautop()` processes the element.
*
* @since 2.0.6
* @see AMP_Tag_And_Attribute_Sanitizer::remove_node()
*
* @param DOMElement $node Node.
*/
protected function unwrap_p_element( DOMElement $node ) {
$parent_node = $node->parentNode;
if (
$parent_node instanceof DOMElement
&&
'p' === $parent_node->tagName
&&
false === $parent_node->hasAttributes()
&&
1 === count( $this->get_child_elements( $parent_node ) )
) {
$parent_node->parentNode->replaceChild( $node, $parent_node );
}
}
}
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