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<?php |
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/** |
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* Optimizes page assets for unreliable networks and fast rendering, particularly with empty caches |
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* - inline scripts and styles |
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* - async external JS |
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* - remove references to external fonts |
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* - move CSS links below scripts in head (scripts after CSS blocks render until script finishes downloading) |
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*/ |
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class Jetpack_Perf_Optimize_Assets { |
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private static $__instance = null; |
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private $remove_remote_fonts = false; |
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private $inline_scripts_and_styles = false; |
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private $async_scripts = false; |
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private $defer_scripts = false; |
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private $inject_critical_css = false; |
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private $minify_html = false; |
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private $concat_local_styles = false; |
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private $concat_style_groups = array(); |
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const INLINE_ASSET_MAX_SIZE_BYTES = 50 * 1024; // 10kb |
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const INLINE_CSS_URL_MAX_SIZE_BYTES = 5 * 1024; // 5kb |
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/** |
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* Singleton implementation |
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* |
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* @return object |
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*/ |
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public static function instance() { |
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if ( ! is_a( self::$__instance, 'Jetpack_Perf_Optimize_Assets' ) ) { |
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self::$__instance = new Jetpack_Perf_Optimize_Assets(); |
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} |
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return self::$__instance; |
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} |
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public function disable_for_request() { |
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$this->remove_remote_fonts = false; |
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$this->inline_scripts_and_styles = false; |
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$this->async_scripts = false; |
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$this->defer_scripts = false; |
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} |
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/** |
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* TODO: detect if this is worth doing for wp-admin? |
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*/ |
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/** |
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* Registers actions |
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*/ |
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private function __construct() { |
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// global $concatenate_scripts; |
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// $concatenate_scripts = true; |
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$this->is_first_load = ! isset( $_COOKIE['jetpack_perf_loaded'] ); |
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$this->remove_remote_fonts = get_option( 'perf_remove_remote_fonts', true ); |
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$this->inline_always = get_option( 'perf_inline_on_every_request', false ); |
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$this->inline_scripts_and_styles = get_option( 'perf_inline_scripts_and_styles', true ) && ( $this->is_first_load || $this->inline_always ); |
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$this->async_scripts = get_option( 'perf_async_scripts', true ); |
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$this->defer_scripts = get_option( 'perf_defer_scripts', true ); |
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$this->move_scripts_above_css_in_header = true; |
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$this->remove_core_emojis = true; |
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$this->prevent_jetpack_implode_css = true; |
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$this->inject_critical_css = true; |
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$this->preload_scripts = true; |
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$this->minify_html = false; |
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$this->concat_local_styles = true; |
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$this->cdn_server = 'https://wordpress.com'; |
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if ( $this->minify_html ) { |
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require_once dirname( __FILE__ ) . '/class.jetpack-perf-optimize-html.php'; |
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Jetpack_Perf_Optimize_HTML::instance(); |
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} |
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if ( $this->remove_remote_fonts ) { |
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add_filter( 'jetpack_perf_remove_script', array( $this, 'remove_external_font_scripts' ), 10, 3 ); |
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add_filter( 'jetpack_perf_remove_style', array( $this, 'remove_external_font_styles' ), 10, 3 ); |
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} |
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add_action( 'wp_enqueue_scripts', array( $this, 'relocate_assets' ), PHP_INT_MAX ); |
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// relocate assets |
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// add_filter( 'jetpack_perf_style_group', array( $this, 'set_style_groups' ), 10, 2 ); |
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// add_filter( 'jetpack_perf_script_group', array( $this, 'set_script_groups' ), 10, 2 ); |
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if ( $this->inject_critical_css ) { |
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add_action( 'wp_head', array( $this, 'render_critical_css' ), 0 ); |
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} |
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if ( $this->concat_local_styles ) { |
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//hooo boy |
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add_filter( 'jetpack_perf_concat_style', '__return_true', 10 ); |
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add_action( 'wp_head', array( $this, 'render_concatenated_styles_head' ), PHP_INT_MAX ); |
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add_action( 'wp_footer', array( $this, 'render_concatenated_styles_footer' ), PHP_INT_MAX ); |
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} |
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if ( $this->preload_scripts ) { |
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add_action( 'wp_print_scripts', array( $this, 'preload_scripts' ) ); |
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} |
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// munge footer scripts |
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//add_filter( 'wp_footer', array( $this, 'encode_footer_scripts' ), -PHP_INT_MAX ); |
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// necessary to catch some woocommerce scripts that get localized inside wp_print_scripts at pri 5 |
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//add_filter( 'wp_print_footer_scripts', array( $this, 'encode_footer_scripts' ), 9 ); |
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// in modern browsers (post-2008) there is a small performance win from |
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// loading CSS after external scripts in the header, rather than before |
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if ( $this->move_scripts_above_css_in_header ) { |
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add_action( 'init', array( $this, 'move_styles_to_bottom_of_header' ), PHP_INT_MAX ); |
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} |
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if ( $this->prevent_jetpack_implode_css ) { |
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add_filter( 'jetpack_implode_frontend_css', '__return_false' ); |
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} |
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// ensure dashicons is loading inline |
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add_filter( 'jetpack_perf_async_style', function( $should_async, $handle, $src ) { |
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if ( 'dashicons' === $handle ) { |
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return false; |
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} |
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return $should_async; |
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}, 10, 3 ); |
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add_filter( 'jetpack_perf_inline_style', function( $should_inline, $handle, $src ) { |
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if ( 'dashicons' === $handle ) { |
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return true; |
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} |
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return $should_inline; |
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}, 10, 3 ); |
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add_filter( 'script_loader_src', array( $this, 'filter_inline_scripts' ), -100, 2 ); |
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add_filter( 'script_loader_tag', array( $this, 'print_inline_scripts' ), -100, 3 ); |
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add_filter( 'style_loader_src', array( $this, 'filter_inline_styles' ), -100, 2 ); |
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add_filter( 'style_loader_tag', array( $this, 'print_inline_styles' ), -100, 4 ); |
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add_action( 'init', array( $this, 'set_first_load_cookie' ) ); |
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/** |
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* Feature, theme and plugin-specific hacks |
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*/ |
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// remove emoji detection - TODO a setting for this |
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if ( $this->remove_core_emojis ) { |
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add_action( 'init', array( $this, 'disable_emojis' ) ); |
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} |
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// inline/defer/async stuff for Jetpack |
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add_action( 'init', array( $this, 'optimize_jetpack' ) ); |
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} |
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/** Disabling Emojis **/ |
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// improves page load performance |
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function disable_emojis() { |
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remove_action( 'wp_head', 'print_emoji_detection_script', 7 ); |
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remove_action( 'admin_print_scripts', 'print_emoji_detection_script' ); |
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remove_action( 'embed_head', 'print_emoji_detection_script', 7 ); |
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remove_action( 'wp_print_styles', 'print_emoji_styles' ); |
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remove_action( 'admin_print_styles', 'print_emoji_styles' ); |
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remove_filter( 'the_content_feed', 'wp_staticize_emoji' ); |
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remove_filter( 'comment_text_rss', 'wp_staticize_emoji' ); |
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remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' ); |
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add_filter( 'tiny_mce_plugins', array( $this, 'disable_emojis_tinymce' ) ); |
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add_filter( 'wp_resource_hints', array( $this, 'disable_emojis_remove_dns_prefetch' ), 10, 2 ); |
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} |
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function optimize_jetpack() { |
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} |
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function render_concatenated_styles_head() { |
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if ( isset( $this->concat_style_groups[0] ) ) { |
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$this->render_concatenated_styles( $this->concat_style_groups[0] ); |
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} |
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} |
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function render_concatenated_styles_footer() { |
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if ( isset( $this->concat_style_groups[1] ) ) { |
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$this->render_concatenated_styles( $this->concat_style_groups[1] ); |
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} |
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} |
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private function render_concatenated_styles( $styles ) { |
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// special URL to concatenation service |
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foreach( $styles as $media => $urls ) { |
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$cdn_url = $this->cdn_server . '/css?files=' . implode( ',', array_map( 'urlencode', $urls ) ); |
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if ( $this->inject_critical_css ) { |
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echo '<!-- jetpack concat --><link rel="preload" onload="this.rel=\'stylesheet\'" as="style" type="text/css" media="' . $media . '" src="' . $cdn_url . '"/>'; |
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} else { |
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echo '<!-- jetpack concat --><link rel="stylesheet" type="text/css" media="' . $media . '" src="' . $cdn_url . '"/>'; |
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} |
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} |
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} |
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/** |
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* Filter function used to remove the tinymce emoji plugin. |
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* |
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* @param array $plugins |
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* @return array Difference betwen the two arrays |
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*/ |
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function disable_emojis_tinymce( $plugins ) { |
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if ( is_array( $plugins ) ) { |
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return array_diff( $plugins, array( 'wpemoji' ) ); |
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} else { |
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return array(); |
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} |
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} |
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/** |
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* Remove emoji CDN hostname from DNS prefetching hints. |
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* |
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* @param array $urls URLs to print for resource hints. |
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* @param string $relation_type The relation type the URLs are printed for. |
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* @return array Difference betwen the two arrays. |
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*/ |
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function disable_emojis_remove_dns_prefetch( $urls, $relation_type ) { |
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if ( 'dns-prefetch' == $relation_type ) { |
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/** This filter is documented in wp-includes/formatting.php */ |
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$emoji_svg_url = apply_filters( 'emoji_svg_url', 'https://s.w.org/images/core/emoji/2/svg/' ); |
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$urls = array_diff( $urls, array( $emoji_svg_url ) ); |
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} |
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return $urls; |
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} |
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// preload scripts we expect to find in the footer |
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function preload_scripts() { |
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global $wp_scripts; |
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$wp_scripts->all_deps( $wp_scripts->queue, false ); |
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foreach( $wp_scripts->to_do as $handle ) { |
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$registration = $wp_scripts->registered[$handle]; |
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// preload anything not async'd, since these scripts are likely to be a higher priority |
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$is_footer_script = isset( $registration->extra['group'] ) && 1 == $registration->extra['group']; |
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// TODO: this doesn't currently affect any scripts - will it ever? |
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if ( ! $this->should_async_script( $registration ) && $is_footer_script && ! $this->should_inline_script( $registration ) ) { |
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echo '<link rel="preload" as="script" href="'. esc_attr( $registration->src ) .'" />'; |
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} |
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} |
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} |
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function render_critical_css() { |
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echo '<!-- critical.css --><style type="text/css">' . file_get_contents( plugin_dir_path( __FILE__ ) . 'critical.css' ) . '</style>'; |
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} |
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// by default we only inline scripts+styles on first page load for a given user |
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function set_first_load_cookie() { |
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View Code Duplication |
if ( ! isset( $_COOKIE['jetpack_perf_loaded'] ) ) { |
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setcookie( 'jetpack_perf_loaded', '1', time() + YEAR_IN_SECONDS, COOKIEPATH, COOKIE_DOMAIN ); |
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} |
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} |
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// this code essentially sets the default asset location to the footer rather than the head |
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function relocate_assets() { |
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global $wp_scripts; |
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//error_log(print_r($wp_scripts,1)); |
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// fetch all deps for head |
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$wp_scripts->all_deps( $wp_scripts->queue, false ); |
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View Code Duplication |
foreach( $wp_scripts->to_do as $handle ) { |
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$registration = $wp_scripts->registered[$handle]; |
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$asset_group = apply_filters( 'jetpack_perf_script_group', $registration->args, $handle ); |
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if ( $asset_group !== $registration->args ) { |
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$registration->args = $asset_group; |
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$wp_scripts->groups[$handle] = $asset_group; |
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} |
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} |
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//$wp_scripts->done = array(); |
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global $wp_styles; |
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// fetch all deps for head |
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$wp_styles->all_deps( $wp_styles->queue, false,1 ); |
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282
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View Code Duplication |
foreach( $wp_styles->to_do as $handle ) { |
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283
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$registration = $wp_styles->registered[$handle]; |
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284
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$asset_group = apply_filters( 'jetpack_perf_style_group', $wp_styles->groups[$handle], $handle ); |
|
285
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286
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if ( $asset_group !== $wp_styles->groups[$handle] ) { |
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287
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$registration->args = $asset_group; |
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288
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$wp_styles->groups[$handle] = $asset_group; |
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289
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} |
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290
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} |
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291
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292
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} |
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293
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294
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// scripts that run after CSS <link>s in the header block waiting for the CSS to load |
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295
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// so we move styles as late as possible in the wp_head action to maximise the chance |
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296
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// of non-blocking rendering |
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297
|
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function move_styles_to_bottom_of_header() { |
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298
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remove_action( 'wp_head', 'wp_print_styles', 8 ); |
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299
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add_action( 'wp_head', 'wp_print_styles', 999 ); |
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300
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} |
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301
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302
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function set_script_groups( $group, $handle ) { |
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303
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return $group; |
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304
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// move everything to the footer |
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305
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//error_log("set script for $handle in group $group"); |
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306
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// force jquery into header, everything else can go in footer unless filtered elsewhere |
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307
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if ( in_array( $handle, array( 'jquery-core', 'jquery-migrate', 'jquery' ) ) ) { |
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308
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return 0; |
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309
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} |
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310
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311
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// force scripts with deps into header |
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312
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if ( $this->script_has_deps( $handle ) ) { |
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313
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return 0; |
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314
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} |
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315
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316
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if ( $group === NULL ) { |
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317
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// error_log("force set $handle to 0"); |
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318
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// set default location to header |
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319
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return 1; |
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320
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} |
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321
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322
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//error_log("set $handle to $group"); |
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323
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324
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return $group; |
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325
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} |
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326
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327
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function set_style_groups( $group, $handle ) { |
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328
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if ( in_array( $handle, array( 'genericons' ) ) ) { |
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329
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return 0; |
|
330
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} |
|
331
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|
|
332
|
|
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if ( $group === NULL ) { |
|
333
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return 1; |
|
334
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|
|
} |
|
335
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|
336
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|
|
return $group; |
|
337
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|
} |
|
338
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|
339
|
|
|
// this is wild: inline scripts in the footer can block rendering, but we don't have a chance to intercept them in the header |
|
340
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|
|
// so let's mark them as defer (which guarantees order) - which also requires adding deps with the localize script base64-encoded |
|
341
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|
342
|
|
|
// so, I don't think this is a performance win - stuff in the footer is already "deferred" and forcing the defer attribute |
|
343
|
|
|
// only makes them load one after the other, rather than allowing the browser to do paralellisation |
|
344
|
|
|
|
|
345
|
|
|
// we're better off concatenating |
|
346
|
|
|
function encode_footer_scripts() { |
|
347
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|
|
global $wp_scripts; |
|
348
|
|
|
$queued = $wp_scripts->all_deps( $wp_scripts->queue, false ); |
|
|
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|
349
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|
|
350
|
|
|
foreach( $wp_scripts->to_do as $handle ) { |
|
351
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|
|
$registration = $wp_scripts->registered[$handle]; |
|
352
|
|
|
//error_log(print_r($registration,1)); |
|
353
|
|
|
if ( isset( $registration->extra['data'] ) && $registration->extra['data'] ) { |
|
354
|
|
|
//register artificial dependency with param of defer |
|
355
|
|
|
$encoded_src = 'data:text/javascript;base64,' . base64_encode( $registration->extra['data'] ); |
|
356
|
|
|
$data_handle = $handle . '_jp_data'; |
|
357
|
|
|
$wp_scripts->add( $data_handle, $encoded_src, array(), false ); |
|
358
|
|
|
$wp_scripts->add_data( $data_handle, 'jetpack-defer', true ); |
|
359
|
|
|
$registration->deps[] = $data_handle; |
|
360
|
|
|
unset( $registration->extra['data'] ); |
|
361
|
|
|
} |
|
362
|
|
|
|
|
363
|
|
|
$registration->extra['jetpack-defer'] = true; |
|
364
|
|
|
$registration->extra['jetpack-async'] = false; |
|
365
|
|
|
} |
|
366
|
|
|
$wp_scripts->to_do = array(); |
|
367
|
|
|
} |
|
368
|
|
|
|
|
369
|
|
|
/** FILTERS **/ |
|
370
|
|
|
public function remove_external_font_scripts( $should_remove, $handle, $asset_url ) { |
|
371
|
|
|
$font_script_url = 'http://use.typekit.com/'; |
|
372
|
|
|
return strncmp( $asset_url, $font_script_url, strlen( $font_script_url ) ) === 0; |
|
373
|
|
|
} |
|
374
|
|
|
|
|
375
|
|
|
public function remove_external_font_styles( $should_remove, $handle, $asset_url ) { |
|
376
|
|
|
$font_url = 'https://fonts.googleapis.com'; |
|
377
|
|
|
return strncmp( $asset_url, $font_url, strlen( $font_url ) ) === 0; |
|
378
|
|
|
} |
|
379
|
|
|
|
|
380
|
|
|
/** SCRIPTS **/ |
|
381
|
|
View Code Duplication |
public function filter_inline_scripts( $src, $handle ) { |
|
382
|
|
|
global $wp_scripts; |
|
383
|
|
|
|
|
384
|
|
|
if ( is_admin() || ! isset( $wp_scripts->registered[$handle] ) ) { |
|
385
|
|
|
return $src; |
|
386
|
|
|
} |
|
387
|
|
|
|
|
388
|
|
|
$script = $wp_scripts->registered[$handle]; |
|
389
|
|
|
|
|
390
|
|
|
// reset src to empty - can't return empty string though because then it skips rendering the tag |
|
391
|
|
|
if ( $this->should_inline_script( $script ) ) { |
|
392
|
|
|
return '#'; |
|
393
|
|
|
} |
|
394
|
|
|
|
|
395
|
|
|
return $src; |
|
396
|
|
|
} |
|
397
|
|
|
|
|
398
|
|
|
public function print_inline_scripts( $tag, $handle, $src ) { |
|
399
|
|
|
global $wp_scripts; |
|
400
|
|
|
|
|
401
|
|
|
if ( is_admin() || ! isset( $wp_scripts->registered[$handle] ) ) { |
|
402
|
|
|
return $tag; |
|
403
|
|
|
} |
|
404
|
|
|
|
|
405
|
|
|
$script = $wp_scripts->registered[$handle]; |
|
406
|
|
|
|
|
407
|
|
|
// if ( $this->should_concat_script( $script ) ) { |
|
408
|
|
|
// $this->buffer_script( $script ); |
|
409
|
|
|
// return ''; |
|
410
|
|
|
// } |
|
411
|
|
|
|
|
412
|
|
|
if ( $this->should_remove_script( $script ) ) { |
|
413
|
|
|
return ''; |
|
414
|
|
|
} |
|
415
|
|
|
|
|
416
|
|
|
if ( $this->should_inline_script( $script ) ) { |
|
417
|
|
|
$label = '<!-- ' . $script->src . ' -->'; |
|
418
|
|
|
// base64-encoding a script into the src URL only makes sense if we intend to async or defer it |
|
419
|
|
|
if ( $this->should_defer_script( $script ) ) { |
|
420
|
|
|
$tag = $label . '<script defer type="text/javascript" src="data:text/javascript;base64,' . base64_encode( file_get_contents( $script->extra['jetpack-inline-file'] ) ) . '"></script>'; |
|
421
|
|
|
} elseif ( $this->should_async_script( $script ) ) { |
|
422
|
|
|
$tag = $label . '<script async type="text/javascript" src="data:text/javascript;base64,' . base64_encode( file_get_contents( $script->extra['jetpack-inline-file'] ) ) . '"></script>'; |
|
423
|
|
|
} else { |
|
424
|
|
|
$tag = $label . '<script type="text/javascript">' . file_get_contents( $script->extra['jetpack-inline-file'] ) . '</script>'; |
|
425
|
|
|
} |
|
426
|
|
|
} else { |
|
427
|
|
|
if ( $this->should_defer_script( $script ) ) { |
|
428
|
|
|
$tag = preg_replace( '/<script /', '<script defer ', $tag ); |
|
429
|
|
|
} elseif ( $this->should_async_script( $script ) ) { |
|
430
|
|
|
$tag = preg_replace( '/<script /', '<script async ', $tag ); |
|
431
|
|
|
} |
|
432
|
|
|
} |
|
433
|
|
|
|
|
434
|
|
|
return $tag; |
|
435
|
|
|
} |
|
436
|
|
|
|
|
437
|
|
|
private function should_async_script( $script ) { |
|
438
|
|
|
// this could be dangerous if scripts have undeclared dependencies |
|
439
|
|
|
// only make scripts async if nothing depends on them |
|
440
|
|
|
// turns out this is a problem - lots of plugins import (say) jquery extensions and then use them in the page from inline scripts. Bah. |
|
441
|
|
|
// but if a script has been declared in the footer? hm maybe that's ok........ |
|
442
|
|
|
$should_async_script = ! $this->script_has_deps( $script->handle ) && isset( $script->extra['group'] ) && $script->extra['group'] === 1; |
|
443
|
|
|
|
|
444
|
|
|
// you can override this logic by setting jetpack-async |
|
445
|
|
|
$should_async_script = $should_async_script || ( isset( $script->extra['jetpack-async'] ) && $script->extra['jetpack-async'] ); |
|
446
|
|
|
return $this->async_scripts && apply_filters( 'jetpack_perf_async_script', $should_async_script, $script->handle, $script->src ); |
|
447
|
|
|
} |
|
448
|
|
|
|
|
449
|
|
|
private function script_has_deps( $handle ) { |
|
450
|
|
|
global $wp_scripts; |
|
451
|
|
View Code Duplication |
foreach ( $wp_scripts->to_do as $other_script_handle ) { |
|
452
|
|
|
$other_script = $wp_scripts->registered[ $other_script_handle ]; |
|
453
|
|
|
if ( in_array( $handle, $other_script->deps ) ) { |
|
454
|
|
|
return true; |
|
455
|
|
|
} |
|
456
|
|
|
} |
|
457
|
|
|
|
|
458
|
|
|
return false; |
|
459
|
|
|
} |
|
460
|
|
|
|
|
461
|
|
|
private function should_defer_script( $script ) { |
|
462
|
|
|
global $wp_scripts; |
|
463
|
|
|
|
|
464
|
|
|
// if it's explicitly not in the footer, or we have Jetpack Defer set, and has no dependencies |
|
465
|
|
|
$should_defer_script = $script->args === 0; |
|
466
|
|
|
|
|
467
|
|
|
// only make scripts deferred if nothing depends on them |
|
468
|
|
View Code Duplication |
foreach ( $wp_scripts->to_do as $other_script_handle ) { |
|
469
|
|
|
$other_script = $wp_scripts->registered[ $other_script_handle ]; |
|
470
|
|
|
if ( in_array( $script->handle, $other_script->deps ) ) { |
|
471
|
|
|
$should_defer_script = false; |
|
472
|
|
|
break; |
|
473
|
|
|
} |
|
474
|
|
|
} |
|
475
|
|
|
|
|
476
|
|
|
$should_defer_script = $should_defer_script || ( isset( $script->extra['jetpack-defer'] ) && $script->extra['jetpack-defer'] ); |
|
477
|
|
|
return $this->defer_scripts && apply_filters( 'jetpack_perf_defer_script', $should_defer_script, $script->handle, $script->src ); |
|
478
|
|
|
} |
|
479
|
|
|
|
|
480
|
|
|
private function should_remove_script( $script ) { |
|
481
|
|
|
return $this->should_remove_asset( 'jetpack_perf_remove_script', $script ); |
|
482
|
|
|
} |
|
483
|
|
|
|
|
484
|
|
|
private function should_inline_script( $script ) { |
|
485
|
|
|
return $this->inline_scripts_and_styles && $this->should_inline_asset( 'jetpack_perf_inline_script', $script ); |
|
486
|
|
|
} |
|
487
|
|
|
|
|
488
|
|
|
/** STYLES **/ |
|
489
|
|
View Code Duplication |
public function filter_inline_styles( $src, $handle ) { |
|
490
|
|
|
global $wp_scripts; |
|
491
|
|
|
|
|
492
|
|
|
if ( is_admin() || ! isset( $wp_scripts->registered[$handle] ) ) { |
|
493
|
|
|
return $src; |
|
494
|
|
|
} |
|
495
|
|
|
|
|
496
|
|
|
$style = $wp_scripts->registered[$handle]; |
|
497
|
|
|
|
|
498
|
|
|
if ( $this->should_inline_style( $style ) ) { |
|
499
|
|
|
return '#'; |
|
500
|
|
|
} |
|
501
|
|
|
|
|
502
|
|
|
return $src; |
|
503
|
|
|
} |
|
504
|
|
|
|
|
505
|
|
|
public function print_inline_styles( $tag, $handle, $href, $media ) { |
|
506
|
|
|
global $wp_styles; |
|
507
|
|
|
|
|
508
|
|
|
if ( is_admin() || ! isset( $wp_styles->registered[$handle] ) ) { |
|
509
|
|
|
return $tag; |
|
510
|
|
|
} |
|
511
|
|
|
|
|
512
|
|
|
$style = $wp_styles->registered[$handle]; |
|
513
|
|
|
|
|
514
|
|
|
if ( $this->should_concat_style( $style ) ) { |
|
515
|
|
|
$this->buffer_style( $style ); |
|
516
|
|
|
return ''; |
|
517
|
|
|
} |
|
518
|
|
|
|
|
519
|
|
|
// async styles use the new(-ish) preload syntax - should only be done if |
|
520
|
|
|
// critical CSS is enabled, since otherwise we'll end up with flash of unstyled content (FOUC) |
|
521
|
|
|
if ( $this->should_async_style( $style ) ) { |
|
522
|
|
|
// we async all styles if inline-critical-css is enabled |
|
523
|
|
|
$existing_tag = $tag; |
|
524
|
|
|
$tag = preg_replace( '/rel=[\'"]stylesheet[\'"]/', 'rel="preload"', $tag ); |
|
525
|
|
|
$tag = preg_replace( '/<link /', '<link onload="this.rel=\'stylesheet\'" as="style" ', $tag ); |
|
526
|
|
|
$tag .= '<noscript>' . $existing_tag . '</noscript>'; |
|
527
|
|
|
return $tag; |
|
528
|
|
|
} |
|
529
|
|
|
|
|
530
|
|
|
if ( $this->should_inline_style( $style ) ) { |
|
531
|
|
|
$label = '<!-- ' . $style->src . ' -->'; |
|
532
|
|
|
$css = $this->fix_css_urls( file_get_contents( $style->extra['jetpack-inline-file'] ), $style->src ); |
|
533
|
|
|
return "$label<style type='text/css' media='$media'>$css</style>"; |
|
534
|
|
|
} |
|
535
|
|
|
|
|
536
|
|
|
if ( $this->should_remove_style( $style ) ) { |
|
537
|
|
|
return ''; |
|
538
|
|
|
} |
|
539
|
|
|
|
|
540
|
|
|
return $tag; |
|
541
|
|
|
} |
|
542
|
|
|
|
|
543
|
|
|
private function buffer_style( $style ) { |
|
544
|
|
|
$group = isset( $style->extra['group'] ) ? $style->extra['group'] : 0; |
|
545
|
|
|
$media = $style->args; |
|
546
|
|
|
|
|
547
|
|
|
if ( ! $media ) { |
|
548
|
|
|
$media = 'all'; |
|
549
|
|
|
} |
|
550
|
|
|
|
|
551
|
|
|
if ( ! isset( $this->concat_style_groups[$group] ) ) { |
|
552
|
|
|
$this->concat_style_groups[$group] = array(); |
|
553
|
|
|
} |
|
554
|
|
|
|
|
555
|
|
|
if ( ! isset( $this->concat_style_groups[$group][$media] ) ) { |
|
556
|
|
|
$this->concat_style_groups[$group][$media] = array(); |
|
557
|
|
|
} |
|
558
|
|
|
|
|
559
|
|
|
$local_url = str_replace( untrailingslashit( site_url() ), '', $style->src ); |
|
560
|
|
|
$this->concat_style_groups[$group][$media][] = $local_url; |
|
561
|
|
|
} |
|
562
|
|
|
|
|
563
|
|
|
private function should_concat_style( $style ) { |
|
564
|
|
|
// only concat local styles |
|
565
|
|
|
$is_local = $this->is_local_url( $style->src ); |
|
|
|
|
|
|
566
|
|
|
// don't concat conditional styles |
|
567
|
|
|
$is_conditional = isset( $style->extra['conditional'] ); |
|
568
|
|
|
return apply_filters( 'jetpack_perf_concat_style', $this->concat_local_styles && $is_local && ! $is_conditional, $style->handle, $style->src ); |
|
569
|
|
|
} |
|
570
|
|
|
|
|
571
|
|
|
// we can async styles if we load critical CSS in the header |
|
572
|
|
|
private function should_async_style( $style ) { |
|
573
|
|
|
return apply_filters( 'jetpack_perf_async_style', $this->inject_critical_css, $style->handle, $style->src ); |
|
574
|
|
|
} |
|
575
|
|
|
|
|
576
|
|
|
// for CSS urls()s, replace with base64-encoded content if smaller than a certain size |
|
577
|
|
|
public function fix_css_urls( $css, $css_url ) { |
|
578
|
|
|
$base = trailingslashit( dirname( $css_url ) ); |
|
579
|
|
|
$base = str_replace( site_url(), '', $base ); |
|
580
|
|
|
|
|
581
|
|
|
// reject absolute site_url |
|
582
|
|
|
if ( 'http' === substr( $base, 0, 4 ) ) { |
|
583
|
|
|
return $css; |
|
584
|
|
|
} |
|
585
|
|
|
|
|
586
|
|
|
return preg_replace_callback( '/url[\s]*\([\s]*["\']?[\s]*(?!https?:\/\/)(?!data:)(?!#)([^\)"\']*)["\']?\)/i', function( $matches ) use ( $base ) { |
|
587
|
|
|
// TODO: embed data-encoded file, for files smaller than certain size? |
|
|
|
|
|
|
588
|
|
|
$url = $this->rel2abspath( $matches[1], $base ); |
|
589
|
|
|
|
|
590
|
|
|
// sneaky - see if it's small enough that it should be encoded and placed inline |
|
591
|
|
|
$local_path = $this->local_url_to_file_path( $url ); |
|
592
|
|
|
if ( file_exists( $local_path ) && filesize( $local_path ) < self::INLINE_CSS_URL_MAX_SIZE_BYTES && ( $mime_type = wp_check_filetype( $url )['type'] ) ) { |
|
593
|
|
|
$url = 'data:' . $mime_type . ';base64,' . base64_encode( file_get_contents( $local_path ) ); |
|
594
|
|
|
} |
|
595
|
|
|
|
|
596
|
|
|
return 'url('.$url.')'; |
|
597
|
|
|
}, $css ); |
|
598
|
|
|
} |
|
599
|
|
|
|
|
600
|
|
|
// see: http://stackoverflow.com/questions/4444475/transfrom-relative-path-into-absolute-url-using-php |
|
601
|
|
|
private function rel2abspath( $rel, $path) { |
|
602
|
|
|
/* remove non-directory element from path */ |
|
603
|
|
|
$path = preg_replace( '#/[^/]*$#', '', $path ); |
|
604
|
|
|
|
|
605
|
|
|
/* destroy path if relative url points to root */ |
|
606
|
|
|
if( $rel[0] == '/' ) |
|
607
|
|
|
$path = ''; |
|
608
|
|
|
|
|
609
|
|
|
/* dirty absolute URL */ |
|
610
|
|
|
$abs = ''; |
|
611
|
|
|
|
|
612
|
|
|
$abs .= $path . '/' . $rel; |
|
613
|
|
|
|
|
614
|
|
|
/* replace '//' or '/./' or '/foo/../' with '/' */ |
|
615
|
|
|
$re = array('#(/\.?/)#', '#/(?!\.\.)[^/]+/\.\./#'); |
|
616
|
|
|
for( $n=1; $n>0; $abs = preg_replace( $re, '/', $abs, -1, $n ) ) {} |
|
|
|
|
|
|
617
|
|
|
|
|
618
|
|
|
/* absolute path is ready! */ |
|
619
|
|
|
return $abs; |
|
620
|
|
|
} |
|
621
|
|
|
|
|
622
|
|
|
private function should_inline_style( $style ) { |
|
623
|
|
|
return $this->inline_scripts_and_styles && $this->should_inline_asset( 'jetpack_perf_inline_style', $style ); |
|
624
|
|
|
} |
|
625
|
|
|
|
|
626
|
|
|
private function should_remove_style( $style ) { |
|
627
|
|
|
return $this->should_remove_asset( 'jetpack_perf_remove_style', $style ); |
|
628
|
|
|
} |
|
629
|
|
|
|
|
630
|
|
|
/** shared code **/ |
|
631
|
|
|
|
|
632
|
|
|
private function is_local_url( $url ) { |
|
633
|
|
|
$site_url = site_url(); |
|
634
|
|
|
return ( strncmp( $url, '/', 1 ) === 0 && strncmp( $url, '//', 2 ) !== 0 ) |
|
635
|
|
|
|| strpos( $url, $site_url ) === 0; |
|
636
|
|
|
} |
|
637
|
|
|
|
|
638
|
|
|
private function should_inline_asset( $filter, $dependency ) { |
|
639
|
|
|
// inline anything local, with a src starting with /, or starting with site_url |
|
640
|
|
|
|
|
641
|
|
|
$is_local_url = $this->is_local_url( $dependency->src ); |
|
642
|
|
|
|
|
643
|
|
|
if ( $is_local_url && ! isset( $dependency->extra['jetpack-inline'] ) ) { |
|
644
|
|
|
$dependency->extra['jetpack-inline'] = true; |
|
645
|
|
|
$dependency->extra['jetpack-inline-file'] = $this->local_url_to_file_path( $dependency->src ); |
|
646
|
|
|
} |
|
647
|
|
|
|
|
648
|
|
|
// early exit if the file doesn't exist or is too large |
|
649
|
|
|
if ( ! isset( $dependency->extra['jetpack-inline-file'] ) || ! file_exists( $dependency->extra['jetpack-inline-file'] ) ) { |
|
650
|
|
|
return false; |
|
651
|
|
|
} |
|
652
|
|
|
|
|
653
|
|
|
// only inline if we don't have a conditional |
|
654
|
|
|
$should_inline = ! isset( $dependency->extra['conditional'] ) |
|
655
|
|
|
&& isset( $dependency->extra['jetpack-inline'] ) |
|
656
|
|
|
&& $dependency->extra['jetpack-inline'] |
|
657
|
|
|
&& filesize( $dependency->extra['jetpack-inline-file'] ) < self::INLINE_ASSET_MAX_SIZE_BYTES; |
|
658
|
|
|
|
|
659
|
|
|
return apply_filters( $filter, $should_inline, $dependency->handle, $dependency->src ); |
|
660
|
|
|
} |
|
661
|
|
|
|
|
662
|
|
|
private function local_url_to_file_path( $url ) { |
|
663
|
|
|
$path = untrailingslashit( ABSPATH ) . parse_url( $url )['path']; |
|
664
|
|
|
if ( '/' !== DIRECTORY_SEPARATOR ) |
|
665
|
|
|
$path = str_replace( '/', DIRECTORY_SEPARATOR, $path ); |
|
666
|
|
|
return $path; |
|
667
|
|
|
} |
|
668
|
|
|
|
|
669
|
|
|
private function should_remove_asset( $filter, $dependency ) { |
|
670
|
|
|
return apply_filters( $filter, false, $dependency->handle, $dependency->src ); |
|
671
|
|
|
} |
|
672
|
|
|
|
|
673
|
|
|
/** |
|
674
|
|
|
* if inline assets are enabled, renders inline |
|
675
|
|
|
* TODO: enable this just for certain paths/patterns/filetypes |
|
|
|
|
|
|
676
|
|
|
* This is actually currently unused |
|
677
|
|
|
*/ |
|
678
|
|
|
public function register_inline_script( $handle, $file, $plugin_file, $deps = false, $ver = false, $in_footer = false ) { |
|
679
|
|
|
$registered = wp_register_script( $handle, plugins_url( $file, $plugin_file ), $deps, $ver, $in_footer ); |
|
680
|
|
|
|
|
681
|
|
View Code Duplication |
if ( $registered ) { |
|
682
|
|
|
$file_full_path = dirname( $plugin_file ) . '/' . $file; |
|
683
|
|
|
wp_script_add_data( $handle, 'jetpack-inline', true ); |
|
684
|
|
|
wp_script_add_data( $handle, 'jetpack-inline-file', $file_full_path ); |
|
685
|
|
|
} |
|
686
|
|
|
|
|
687
|
|
|
return $registered; |
|
688
|
|
|
} |
|
689
|
|
|
|
|
690
|
|
|
/** |
|
691
|
|
|
* if inline assets are enabled, renders inline |
|
692
|
|
|
* TODO: enable this just for certain paths/patterns/filetypes |
|
|
|
|
|
|
693
|
|
|
* This is actually currently unused |
|
694
|
|
|
*/ |
|
695
|
|
|
public function register_inline_style( $handle, $file, $plugin_file, $deps = array(), $ver = false, $media = 'all' ) { |
|
696
|
|
|
$registered = wp_register_style( $handle, plugins_url( $file, $plugin_file ), $deps, $ver, $media ); |
|
697
|
|
|
|
|
698
|
|
View Code Duplication |
if ( $registered ) { |
|
699
|
|
|
$file_full_path = dirname( $plugin_file ) . '/' . $file; |
|
700
|
|
|
wp_style_add_data( $handle, 'jetpack-inline', true ); |
|
701
|
|
|
wp_style_add_data( $handle, 'jetpack-inline-file', $file_full_path ); |
|
702
|
|
|
} |
|
703
|
|
|
} |
|
704
|
|
|
} |
|
705
|
|
|
|
Automattic /
jetpack
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