$args Array of arguments to populate the lazyload script tag. * @return void */ public function insertLazyloadScript( $args = [] ) { echo $this->getLazyloadScript( $args ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped } /** * Gets the inline lazyload script configuration * * @param array $args Array of arguments to populate the lazyload script options. * @return string */ public function getInlineLazyloadScript( $args = [] ) { $defaults = [ 'elements' => [ 'iframe', ], 'threshold' => 300, 'options' => [], ]; $allowed_options = [ 'container' => 1, 'thresholds' => 1, 'data_bg' => 1, 'data_bg_hidpi' => 1, 'data_bg_multi' => 1, 'data_bg_multi_hidpi' => 1, 'data_poster' => 1, 'class_applied' => 1, 'class_error' => 1, 'class_entered' => 1, 'class_exited' => 1, 'cancel_on_exit' => 1, 'unobserve_entered' => 1, 'unobserve_completed' => 1, 'callback_enter' => 1, 'callback_exit' => 1, 'callback_loading' => 1, 'callback_cancel' => 1, 'callback_loaded' => 1, 'callback_error' => 1, 'callback_applied' => 1, 'callback_finish' => 1, 'use_native' => 1, ]; $args = wp_parse_args( $args, $defaults ); $script = ''; $args['options'] = array_intersect_key( $args['options'], $allowed_options ); $script .= 'window.lazyLoadOptions = '; if ( isset( $args['elements']['background_image'] ) ) { $script .= '['; } $script .= '{ elements_selector: "' . esc_attr( implode( ',', $args['elements'] ) ) . '", data_src: "lazy-src", data_srcset: "lazy-srcset", data_sizes: "lazy-sizes", class_loading: "lazyloading", class_loaded: "lazyloaded", threshold: ' . esc_attr( $args['threshold'] ) . ', callback_loaded: function(element) { if ( element.tagName === "IFRAME" && element.dataset.rocketLazyload == "fitvidscompatible" ) { if (element.classList.contains("lazyloaded") ) { if (typeof window.jQuery != "undefined") { if (jQuery.fn.fitVids) { jQuery(element).parent().fitVids(); } } } } }'; if ( ! empty( $args['options'] ) ) { $script .= ',' . PHP_EOL; foreach ( $args['options'] as $option => $value ) { $script .= $option . ': ' . $value . ','; } $script = rtrim( $script, ',' ); } if ( isset( $args['elements']['background_image'] ) ) { $script .= '},{ elements_selector: "' . esc_attr( $args['elements']['background_image'] ) . '", data_src: "lazy-src", data_srcset: "lazy-srcset", data_sizes: "lazy-sizes", class_loading: "lazyloading", class_loaded: "lazyloaded", threshold: ' . esc_attr( $args['threshold'] ) . ', }];'; } else { $script .= '};'; } $script .= ' window.addEventListener(\'LazyLoad::Initialized\', function (e) { var lazyLoadInstance = e.detail.instance; if (window.MutationObserver) { var observer = new MutationObserver(function(mutations) { var image_count = 0; var iframe_count = 0; var rocketlazy_count = 0; mutations.forEach(function(mutation) { for (var i = 0; i < mutation.addedNodes.length; i++) { if (typeof mutation.addedNodes[i].getElementsByTagName !== \'function\') { continue; } if (typeof mutation.addedNodes[i].getElementsByClassName !== \'function\') { continue; } images = mutation.addedNodes[i].getElementsByTagName(\'img\'); is_image = mutation.addedNodes[i].tagName == "IMG"; iframes = mutation.addedNodes[i].getElementsByTagName(\'iframe\'); is_iframe = mutation.addedNodes[i].tagName == "IFRAME"; rocket_lazy = mutation.addedNodes[i].getElementsByClassName(\'rocket-lazyload\'); image_count += images.length; iframe_count += iframes.length; rocketlazy_count += rocket_lazy.length; if(is_image){ image_count += 1; } if(is_iframe){ iframe_count += 1; } } } ); if(image_count > 0 || iframe_count > 0 || rocketlazy_count > 0){ lazyLoadInstance.update(); } } ); var b = document.getElementsByTagName("body")[0]; var config = { childList: true, subtree: true }; observer.observe(b, config); } }, false);'; return $script; } /** * Returns the lazyload inline script * * @param array $args Array of arguments to populate the lazyload script options. * @return string */ public function getLazyloadScript( $args = [] ) { $defaults = [ 'base_url' => '', 'version' => '', ]; $args = wp_parse_args( $args, $defaults ); $min = ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '' : '.min'; /** * Filters the script tag for the lazyload script * * @since 2.2.6 * * @param string $script_tag HTML tag for the lazyload script. */ return apply_filters( 'rocket_lazyload_script_tag', '' ); // phpcs:ignore WordPress.WP.EnqueuedResources.NonEnqueuedScript } /** * Inserts in the HTML the script to replace the Youtube thumbnail by the iframe. * * @param array $args Array of arguments to populate the script options. * @return void */ public function insertYoutubeThumbnailScript( $args = [] ) { echo $this->getYoutubeThumbnailScript( $args ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped } /** * Returns the Youtube Thumbnail inline script * * @param array $args Array of arguments to populate the script options. * @return string */ public function getYoutubeThumbnailScript( $args = [] ) { $defaults = [ 'resolution' => 'hqdefault', 'lazy_image' => false, 'native' => true, 'extension' => 'jpg', 'button_aria_label' => 'play Youtube video', ]; $allowed_resolutions = [ 'default' => [ 'width' => 120, 'height' => 90, ], 'mqdefault' => [ 'width' => 320, 'height' => 180, ], 'hqdefault' => [ 'width' => 480, 'height' => 360, ], 'sddefault' => [ 'width' => 640, 'height' => 480, ], 'maxresdefault' => [ 'width' => 1280, 'height' => 720, ], ]; $args['resolution'] = ( isset( $args['resolution'] ) && isset( $allowed_resolutions[ $args['resolution'] ] ) ) ? $args['resolution'] : 'hqdefault'; $args = wp_parse_args( $args, $defaults ); $extension_uri = 'webp' === $args['extension'] ? 'vi_webp' : 'vi'; $image_url = 'https://i.ytimg.com/' . $extension_uri . '/ID/' . $args['resolution'] . '.' . $args['extension']; $width = $allowed_resolutions[ $args['resolution'] ]['width']; $height = $allowed_resolutions[ $args['resolution'] ]['height']; $native = ( isset( $args['native'] ) && $args['native'] ) ? 'true' : 'false'; $lazy_image = ( isset( $args['lazy_image'] ) && $args['lazy_image'] ) ? 'true' : 'false'; $button_aria_label = $args['button_aria_label']; /** * Filters the patterns excluded from lazyload for youtube thumbnails. * * @param array $excluded_patterns Array of excluded patterns. */ $excluded_patterns = apply_filters( 'rocket_lazyload_exclude_youtube_thumbnail', [] ); if ( ! is_array( $excluded_patterns ) ) { $excluded_patterns = []; } $excluded_patterns = wp_json_encode( $excluded_patterns ); // phpcs:disable Generic.Files.LineLength.TooLong return ''; // phpcs:enable Generic.Files.LineLength.TooLong } /** * Inserts the CSS to style the Youtube thumbnail container * * @param array $args Array of arguments to populate the CSS. * @return void */ public function insertYoutubeThumbnailCSS( $args = [] ) { wp_register_style( 'rocket-lazyload', false ); // phpcs:ignore WordPress.WP.EnqueuedResourceParameters.MissingVersion wp_enqueue_style( 'rocket-lazyload' ); wp_add_inline_style( 'rocket-lazyload', $this->getYoutubeThumbnailCSS( $args ) ); } /** * Returns the CSS for the Youtube Thumbnail * * @param array $args Array of arguments to populate the CSS. * @return string */ public function getYoutubeThumbnailCSS( $args = [] ) { $defaults = [ 'base_url' => '', 'responsive_embeds' => true, ]; $args = wp_parse_args( $args, $defaults ); $css = '.rll-youtube-player{position:relative;padding-bottom:56.23%;height:0;overflow:hidden;max-width:100%;}.rll-youtube-player:focus-within{outline: 2px solid currentColor;outline-offset: 5px;}.rll-youtube-player iframe{position:absolute;top:0;left:0;width:100%;height:100%;z-index:100;background:0 0}.rll-youtube-player img{bottom:0;display:block;left:0;margin:auto;max-width:100%;width:100%;position:absolute;right:0;top:0;border:none;height:auto;-webkit-transition:.4s all;-moz-transition:.4s all;transition:.4s all}.rll-youtube-player img:hover{-webkit-filter:brightness(75%)}.rll-youtube-player .play{height:100%;width:100%;left:0;top:0;position:absolute;background:url(' . $args['base_url'] . 'img/youtube.png) no-repeat center;background-color: transparent !important;cursor:pointer;border:none;}'; if ( $args['responsive_embeds'] ) { $css .= '.wp-embed-responsive .wp-has-aspect-ratio .rll-youtube-player{position:absolute;padding-bottom:0;width:100%;height:100%;top:0;bottom:0;left:0;right:0}'; } return $css; } /** * Inserts the CSS needed when Javascript is not enabled to keep the display correct * * @return void */ public function insertNoJSCSS() { echo $this->getNoJSCSS(); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped } /** * Returns the CSS to correctly display images when JavaScript is disabled * * @return string */ public function getNoJSCSS() { return ''; } }