File: /var/www/html/wpicare/wp-content/plugins/wp-rocket/inc/Engine/Common/ExtractCSS/Subscriber.php
<?php
namespace WP_Rocket\Engine\Common\ExtractCSS;
use WP_Rocket\Engine\Optimization\RegexTrait;
use WP_Rocket\Event_Management\Subscriber_Interface;
use WP_Rocket\Logger\LoggerAware;
use WP_Rocket\Logger\LoggerAwareInterface;
class Subscriber implements Subscriber_Interface, LoggerAwareInterface {
use RegexTrait;
use LoggerAware;
/**
* Returns an array of events that this subscriber wants to listen to.
*
* The array key is the event name. The value can be:
*
* * The method name
* * An array with the method name and priority
* * An array with the method name, priority and number of accepted arguments
*
* For instance:
*
* * array('hook_name' => 'method_name')
* * array('hook_name' => array('method_name', $priority))
* * array('hook_name' => array('method_name', $priority, $accepted_args))
* * array('hook_name' => array(array('method_name_1', $priority_1, $accepted_args_1)), array('method_name_2', $priority_2, $accepted_args_2)))
*
* @return array
*/
public static function get_subscribed_events() {
return [
'rocket_generate_lazyloaded_css' => [
[ 'extract_css_files_from_html', 11 ],
[ 'extract_inline_css_from_html', 14 ],
],
];
}
/**
* Extract CSS files from the HTML.
*
* @param array $data Data sent.
* @return array
*/
public function extract_css_files_from_html( array $data ): array {
if ( ! key_exists( 'html', $data ) ) {
$this->logger::notice(
'Extract CSS files bailed out',
[
'type' => 'extract_css',
'data' => $data,
]
);
return $data;
}
if ( ! key_exists( 'css_files', $data ) ) {
$data['css_files'] = [];
}
$css_links = [];
$html = $this->hide_comments( $data['html'] );
$link_styles = $this->find(
'<link\s+([^>]+[\s"\'])?href\s*=\s*[\'"]\s*?(?<url>[^\'"]+(?:\?[^\'"]*)?)\s*?[\'"]([^>]+)?\/?>',
$html,
'Uis'
);
foreach ( $link_styles as $style ) {
if (
(
! (bool) preg_match( '/rel=[\'"]?stylesheet[\'"]?/is', $style[0] )
&&
! ( (bool) preg_match( '/rel=[\'"]?preload[\'"]?/is', $style[0] ) && (bool) preg_match( '/as=[\'"]?style[\'"]?/is', $style[0] ) )
)
||
strstr( $style['url'], '//fonts.googleapis.com/css' )
) {
$this->logger::notice(
"Skipped URL: {$style['url']}",
[
'type' => 'extract_css',
'data' => $style[0],
]
);
continue;
}
$css_links [] = $style['url'];
$this->logger::notice(
"Extracted URL: {$style['url']}",
[
'type' => 'extract_css',
'data' => $style[0],
]
);
}
$data['css_files'] = array_merge( $data['css_files'], $css_links );
return $data;
}
/**
* Extract inline CSS from the HTML.
*
* @param array $data Data sent.
* @return array
*/
public function extract_inline_css_from_html( array $data ): array {
if ( ! key_exists( 'html', $data ) ) {
$this->logger::notice(
'Extract CSS inline bailed out',
[
'type' => 'extract_css',
'data' => $data,
]
);
return $data;
}
if ( ! key_exists( 'css_inline', $data ) ) {
$data['css_inline'] = [];
}
$css_links = [];
$html = $this->hide_comments( $data['html'] );
$inline_styles = $this->find(
'<style(?<atts>.*)>(?<content>.*)<\/style\s*>',
$html
);
foreach ( $inline_styles as $style ) {
$content = trim( $style['content'] );
if ( empty( $content ) ) {
$this->logger::notice(
"Skipped Content: {$style['content']}",
[
'type' => 'extract_css',
'data' => $style[0],
]
);
continue;
}
$css_links [] = $content;
$this->logger::notice(
"Extracted Content: $content",
[
'type' => 'extract_css',
'data' => $style[0],
]
);
}
$data['css_inline'] = array_merge( $data['css_inline'], $css_links );
return $data;
}
}