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<?php |
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/** |
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* Infinite scroll sanitizer for AMP pages. |
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* |
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* @package Jetpack |
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* @since 9.1.0 |
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*/ |
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/** |
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* This class makes the necessary changes to an AMP page when making an amp-next-page request. |
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*/ |
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final class Jetpack_AMP_Infinite_Scroll_Sanitizer extends AMP_Base_Sanitizer { |
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/** |
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* @var array { |
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* @type string $footer_xpaths |
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* @type string[] $next_page_hide_xpaths |
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* @type string[] $hidden_xpaths |
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* } |
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*/ |
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protected $args; |
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/** |
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* XPath. |
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* |
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* @var DOMXPath |
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*/ |
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private $xpath; |
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/** |
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* Sanitize. |
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*/ |
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public function sanitize() { |
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$this->xpath = new DOMXPath( $this->dom ); |
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// Abort if there is no amp-next-page in the document. |
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$next_page_element = $this->xpath->query( '//amp-next-page[ @class = "jetpack-infinite-scroll" ]' )->item( 0 ); |
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if ( ! $next_page_element instanceof DOMElement ) { |
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return; |
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} |
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// Abort amp-next-page if no footer element discovered. |
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$footer_elements = array(); |
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if ( ! empty( $this->args['footer_xpaths'] ) ) { |
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foreach ( $this->args['footer_xpaths'] as $footer_xpath ) { |
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$footer_elements = array_merge( $footer_elements, iterator_to_array( $this->xpath->query( $footer_xpath ) ) ); |
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} |
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} |
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if ( empty( $footer_elements ) ) { |
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return; |
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} |
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// Abort if the amp-next-page lacks a div[footer] element. |
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$footer_container = $this->xpath->query( './div[ @footer ]', $next_page_element )->item( 0 ); |
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if ( ! $footer_container instanceof DOMElement ) { |
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return; |
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} |
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// Make sure amp-next-page is at the end of the body. |
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$body = $this->dom->getElementsByTagName( 'body' )->item( 0 ); |
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$next_page_element->parentNode->removeChild( $next_page_element ); |
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$body->appendChild( $next_page_element ); |
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// Move the footer to be inside of <amp-next-page>. |
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foreach ( $footer_elements as $footer_element ) { |
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$footer_element->parentNode->removeChild( $footer_element ); |
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$footer_container->appendChild( $footer_element ); |
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} |
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$this->hide_next_page_elements(); |
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$this->hide_hidden_elements(); |
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} |
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/** |
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* Hide next page elements. |
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*/ |
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View Code Duplication |
private function hide_next_page_elements() { |
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if ( isset( $this->args['next_page_hide_xpaths'] ) && is_array( $this->args['next_page_hide_xpaths'] ) ) { |
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$xpaths = $this->args['next_page_hide_xpaths']; |
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} else { |
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$xpaths = array(); |
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} |
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$xpaths[] = '//div[ @id = "wpadminbar" ]'; |
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foreach ( $xpaths as $next_page_hide_xpath ) { |
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/** @var DOMElement $element */ |
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foreach ( $this->xpath->query( $next_page_hide_xpath ) as $element ) { |
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$element->setAttribute( 'next-page-hide', '' ); |
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} |
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} |
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} |
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/** |
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* Hide elements on initial load. |
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*/ |
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View Code Duplication |
private function hide_hidden_elements() { |
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if ( isset( $this->args['hidden_xpaths'] ) && is_array( $this->args['hidden_xpaths'] ) ) { |
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$xpaths = $this->args['hidden_xpaths']; |
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} else { |
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$xpaths = array(); |
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} |
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foreach ( $xpaths as $hidden_xpath ) { |
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/** @var DOMElement $element */ |
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foreach ( $this->xpath->query( $hidden_xpath ) as $element ) { |
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$element->setAttribute( 'hidden', '' ); |
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} |
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} |
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} |
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} |
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Automattic /
jetpack
