113 lines
3.2 KiB
PHP
113 lines
3.2 KiB
PHP
<?php
|
|
|
|
namespace Automattic\Jetpack_Boost\Modules\Optimizations\Critical_CSS;
|
|
|
|
use Automattic\Jetpack_Boost\Admin\Regenerate_Admin_Notice;
|
|
use Automattic\Jetpack_Boost\Contracts\Changes_Page_Output;
|
|
use Automattic\Jetpack_Boost\Contracts\Optimization;
|
|
use Automattic\Jetpack_Boost\Contracts\Pluggable;
|
|
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Admin_Bar_Compatibility;
|
|
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Invalidator;
|
|
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_State;
|
|
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Critical_CSS_Storage;
|
|
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Display_Critical_CSS;
|
|
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Generator;
|
|
use Automattic\Jetpack_Boost\Lib\Critical_CSS\Source_Providers\Source_Providers;
|
|
use Automattic\Jetpack_Boost\Lib\Premium_Features;
|
|
|
|
class Critical_CSS implements Pluggable, Changes_Page_Output, Optimization {
|
|
|
|
/**
|
|
* Critical CSS storage class instance.
|
|
*
|
|
* @var Critical_CSS_Storage
|
|
*/
|
|
protected $storage;
|
|
|
|
/**
|
|
* Critical CSS Provider Paths.
|
|
*
|
|
* @var Source_Providers
|
|
*/
|
|
protected $paths;
|
|
|
|
/**
|
|
* Prepare module. This is run irrespective of the module activation status.
|
|
*/
|
|
public function __construct() {
|
|
$this->storage = new Critical_CSS_Storage();
|
|
$this->paths = new Source_Providers();
|
|
}
|
|
|
|
/**
|
|
* Check if the module is ready and already serving critical CSS.
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function is_ready() {
|
|
return ( new Critical_CSS_State() )->is_generated();
|
|
}
|
|
|
|
public static function is_available() {
|
|
return true !== Premium_Features::has_feature( Premium_Features::CLOUD_CSS );
|
|
}
|
|
|
|
/**
|
|
* This is only run if Critical CSS module has been activated.
|
|
*/
|
|
public function setup() {
|
|
add_action( 'wp', array( $this, 'display_critical_css' ) );
|
|
add_filter( 'jetpack_boost_total_problem_count', array( $this, 'update_total_problem_count' ) );
|
|
|
|
Generator::init();
|
|
Critical_CSS_Invalidator::init();
|
|
CSS_Proxy::init();
|
|
|
|
// Admin Notices
|
|
Regenerate_Admin_Notice::init();
|
|
|
|
return true;
|
|
}
|
|
|
|
public static function get_slug() {
|
|
return 'critical_css';
|
|
}
|
|
|
|
public function display_critical_css() {
|
|
// Don't look for Critical CSS in the dashboard.
|
|
if ( is_admin() ) {
|
|
return;
|
|
}
|
|
// Don't display Critical CSS when generating Critical CSS.
|
|
if ( Generator::is_generating_critical_css() ) {
|
|
return;
|
|
}
|
|
|
|
// Don't show Critical CSS in customizer previews.
|
|
if ( is_customize_preview() ) {
|
|
return;
|
|
}
|
|
|
|
// Get the Critical CSS to show.
|
|
$critical_css = $this->paths->get_current_request_css();
|
|
if ( ! $critical_css ) {
|
|
return;
|
|
}
|
|
|
|
if ( defined( 'WP_DEBUG' ) && WP_DEBUG === true ) {
|
|
$critical_css = "/* Critical CSS Key: {$this->paths->get_current_critical_css_key()} */\n" . $critical_css;
|
|
}
|
|
|
|
$display = new Display_Critical_CSS( $critical_css );
|
|
add_action( 'wp_head', array( $display, 'display_critical_css' ), 0 );
|
|
add_filter( 'style_loader_tag', array( $display, 'asynchronize_stylesheets' ), 10, 4 );
|
|
add_action( 'wp_footer', array( $display, 'onload_flip_stylesheets' ) );
|
|
|
|
// Ensure admin bar compatibility.
|
|
Admin_Bar_Compatibility::init();
|
|
}
|
|
|
|
public function update_total_problem_count( $count ) {
|
|
return ( new Critical_CSS_State() )->has_errors() ? ++$count : $count;
|
|
}
|
|
}
|