176 lines
3.6 KiB
PHP
176 lines
3.6 KiB
PHP
<?php
|
|
|
|
namespace WP_Rocket\Engine\Optimization\DelayJS;
|
|
|
|
use WP_Rocket\Admin\Options_Data;
|
|
|
|
class HTML {
|
|
|
|
/**
|
|
* Plugin options instance.
|
|
*
|
|
* @since 3.7
|
|
*
|
|
* @var Options_Data
|
|
*/
|
|
protected $options;
|
|
|
|
/**
|
|
* Allowed scripts regex.
|
|
*
|
|
* @since 3.7
|
|
*
|
|
* @var string
|
|
*/
|
|
private $allowed_scripts = '';
|
|
|
|
/**
|
|
* Creates an instance of HTML.
|
|
*
|
|
* @since 3.7
|
|
*
|
|
* @param Options_Data $options Plugin options instance.
|
|
*/
|
|
public function __construct( Options_Data $options ) {
|
|
$this->options = $options;
|
|
}
|
|
|
|
/**
|
|
* Adjust HTML to have delay js structure.
|
|
*
|
|
* @param string $html Buffer html for the page.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function delay_js( $html ) {
|
|
|
|
if ( ! $this->is_allowed() ) {
|
|
return $html;
|
|
}
|
|
|
|
$this->allowed_scripts = $this->prepare_allowed_scripts_regex();
|
|
|
|
if ( empty( $this->allowed_scripts ) ) {
|
|
return $html;
|
|
}
|
|
|
|
return $this->parse( $html );
|
|
}
|
|
|
|
/**
|
|
* Checks if is allowed to Delay JS.
|
|
*
|
|
* @since 3.7
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function is_allowed() {
|
|
if ( rocket_bypass() ) {
|
|
return false;
|
|
}
|
|
|
|
if ( rocket_get_constant( 'DONOTROCKETOPTIMIZE' ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( is_rocket_post_excluded_option( 'delay_js' ) ) {
|
|
return false;
|
|
}
|
|
|
|
return (bool) $this->options->get( 'delay_js', 0 );
|
|
}
|
|
|
|
/**
|
|
* Parse the html and add/remove attributes from specific scripts.
|
|
*
|
|
* @param string $html Buffer html for the page.
|
|
*
|
|
* @return string
|
|
*/
|
|
private function parse( $html ) {
|
|
$replaced_html = preg_replace_callback( '/<script\s*(?<attr>[^>]*)?>(?<content>.*)?<\/script>/Uims', [ $this, 'replace_scripts' ], $html );
|
|
|
|
if ( empty( $replaced_html ) ) {
|
|
return $html;
|
|
}
|
|
|
|
return $replaced_html;
|
|
}
|
|
|
|
/**
|
|
* Callback method for preg_replace_callback that is used to adjust attributes for specific scripts.
|
|
*
|
|
* @param array $matches Matches array for scripts regex.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function replace_scripts( $matches ) {
|
|
if (
|
|
empty( $this->allowed_scripts )
|
|
||
|
|
(
|
|
! empty( $this->allowed_scripts )
|
|
&&
|
|
! preg_match( '#(' . $this->allowed_scripts . ')#', $matches[0] )
|
|
)
|
|
) {
|
|
return $matches[0];
|
|
}
|
|
|
|
$src = '';
|
|
$matches['attr'] = trim( $matches['attr'] );
|
|
|
|
if ( ! empty( $matches['attr'] ) ) {
|
|
if ( preg_match( '/src=(["\'])(.*?)\1/', $matches['attr'], $src_matches ) ) {
|
|
$src = $src_matches[2];
|
|
|
|
// Remove the src attribute.
|
|
$matches['attr'] = str_replace( $src_matches[0], '', $matches['attr'] );
|
|
}
|
|
}
|
|
|
|
if ( empty( $src ) ) {
|
|
// Get the JS content.
|
|
if ( ! empty( $matches['content'] ) ) {
|
|
$src = 'data:text/javascript;base64,' . base64_encode( $matches['content'] );// phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.obfuscation_base64_encode
|
|
}
|
|
}
|
|
|
|
if ( empty( $src ) ) {
|
|
return $matches[0];
|
|
}
|
|
|
|
return "<script data-rocketlazyloadscript='{$src}' {$matches['attr']}></script>";
|
|
}
|
|
|
|
/**
|
|
* Prepare allowed scripts to be used as regex.
|
|
*
|
|
* @return string
|
|
*/
|
|
private function prepare_allowed_scripts_regex() {
|
|
$delay_js_scripts = $this->options->get( 'delay_js_scripts', [] );
|
|
|
|
/**
|
|
* Filters JS files to included into delay JS.
|
|
*
|
|
* @since 3.7
|
|
*
|
|
* @param array $delay_js_scripts List of allowed JS files.
|
|
*/
|
|
$delay_js_scripts = (array) apply_filters( 'rocket_delay_js_scripts', $delay_js_scripts );
|
|
|
|
if ( empty( $delay_js_scripts ) ) {
|
|
return '';
|
|
}
|
|
|
|
foreach ( $delay_js_scripts as $i => $delay_js_script ) {
|
|
$delay_js_scripts[ $i ] = preg_quote( str_replace( '#', '\#', $delay_js_script ), '#' );
|
|
}
|
|
|
|
return implode( '|', $delay_js_scripts );
|
|
|
|
}
|
|
|
|
}
|