add wp-rocket
This commit is contained in:
nguyen dung
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<?php
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/**
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* Handles lazyloading of iframes
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*
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* @package RocketLazyload
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*/
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namespace WP_Rocket\Dependencies\RocketLazyload;
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/**
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* A class to provide the methods needed to lazyload iframes in WP Rocket and Lazyload by WP Rocket
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*/
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class Iframe {
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/**
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* Finds iframes in the HTML provided and call the methods to lazyload them
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*
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* @param string $html Original HTML.
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* @param string $buffer Content to parse.
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* @param array $args Array of arguments to use.
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* @return string
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*/
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public function lazyloadIframes( $html, $buffer, $args = [] ) {
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$defaults = [
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'youtube' => false,
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];
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$args = wp_parse_args( $args, $defaults );
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if ( ! preg_match_all( '@<iframe(?<atts>\s.+)>.*</iframe>@iUs', $buffer, $iframes, PREG_SET_ORDER ) ) {
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return $html;
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}
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$iframes = array_unique( $iframes, SORT_REGULAR );
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foreach ( $iframes as $iframe ) {
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if ( $this->isIframeExcluded( $iframe ) ) {
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continue;
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}
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// Given the previous regex pattern, $iframe['atts'] starts with a whitespace character.
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if ( ! preg_match( '@\ssrc\s*=\s*(\'|")(?<src>.*)\1@iUs', $iframe['atts'], $atts ) ) {
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continue;
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}
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$iframe['src'] = trim( $atts['src'] );
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if ( '' === $iframe['src'] ) {
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continue;
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}
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if ( $args['youtube'] ) {
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$iframe_lazyload = $this->replaceYoutubeThumbnail( $iframe );
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}
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if ( empty( $iframe_lazyload ) ) {
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$iframe_lazyload = $this->replaceIframe( $iframe );
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}
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$html = str_replace( $iframe[0], $iframe_lazyload, $html );
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unset( $iframe_lazyload );
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}
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return $html;
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}
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/**
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* Checks if the provided iframe is excluded from lazyload
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*
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* @param array $iframe Array of matched patterns.
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* @return boolean
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*/
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public function isIframeExcluded( $iframe ) {
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foreach ( $this->getExcludedPatterns() as $excluded_pattern ) {
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if ( strpos( $iframe[0], $excluded_pattern ) !== false ) {
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return true;
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}
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}
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return false;
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}
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/**
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* Gets patterns excluded from lazyload for iframes
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*
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* @since 2.1.1
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*
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* @return array
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*/
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private function getExcludedPatterns() {
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/**
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* Filters the patterns excluded from lazyload for iframes
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*
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* @since 2.1.1
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*
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* @param array $excluded_patterns Array of excluded patterns.
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*/
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return apply_filters(
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'rocket_lazyload_iframe_excluded_patterns',
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[
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'gform_ajax_frame',
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'data-no-lazy=',
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'recaptcha/api/fallback',
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'loading="eager"',
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'data-skip-lazy',
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'skip-lazy',
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]
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);
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}
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/**
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* Applies lazyload on the iframe provided
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*
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* @param array $iframe Array of matched elements.
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* @return string
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*/
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private function replaceIframe( $iframe ) {
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/**
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* Filter the LazyLoad placeholder on src attribute
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*
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* @since 1.0
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*
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* @param string $placeholder placeholder that will be printed.
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*/
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$placeholder = apply_filters( 'rocket_lazyload_placeholder', 'about:blank' );
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$placeholder_atts = str_replace( $iframe['src'], $placeholder, $iframe['atts'] );
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$iframe_lazyload = str_replace( $iframe['atts'], $placeholder_atts . ' data-rocket-lazyload="fitvidscompatible" data-lazy-src="' . esc_url( $iframe['src'] ) . '"', $iframe[0] );
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if ( ! preg_match( '@\sloading\s*=\s*(\'|")(?:lazy|auto)\1@i', $iframe_lazyload ) ) {
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$iframe_lazyload = str_replace( '<iframe', '<iframe loading="lazy"', $iframe_lazyload );
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}
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/**
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* Filter the LazyLoad HTML output on iframes
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*
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* @since 1.0
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*
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* @param array $html Output that will be printed.
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*/
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$iframe_lazyload = apply_filters( 'rocket_lazyload_iframe_html', $iframe_lazyload );
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$iframe_lazyload .= '<noscript>' . $iframe[0] . '</noscript>';
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return $iframe_lazyload;
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}
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/**
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* Replaces the iframe provided by the Youtube thumbnail
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*
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* @param array $iframe Array of matched elements.
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* @return bool|string
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*/
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private function replaceYoutubeThumbnail( $iframe ) {
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$youtube_id = $this->getYoutubeIDFromURL( $iframe['src'] );
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if ( ! $youtube_id ) {
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return false;
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}
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$query = wp_parse_url( htmlspecialchars_decode( $iframe['src'] ), PHP_URL_QUERY );
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$youtube_url = $this->changeYoutubeUrlForYoutuDotBe( $iframe['src'] );
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$youtube_url = $this->cleanYoutubeUrl( $iframe['src'] );
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/**
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* Filter the LazyLoad HTML output on Youtube iframes
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*
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* @since 2.11
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*
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* @param array $html Output that will be printed.
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*/
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$youtube_lazyload = apply_filters( 'rocket_lazyload_youtube_html', '<div class="rll-youtube-player" data-src="' . esc_attr( $youtube_url ) . '" data-id="' . esc_attr( $youtube_id ) . '" data-query="' . esc_attr( $query ) . '"></div>' );
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$youtube_lazyload .= '<noscript>' . $iframe[0] . '</noscript>';
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return $youtube_lazyload;
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}
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/**
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* Gets the Youtube ID from the URL provided
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*
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* @param string $url URL to search.
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* @return bool|string
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*/
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public function getYoutubeIDFromURL( $url ) {
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$pattern = '#^(?:https?:)?(?://)?(?:www\.)?(?:youtu\.be|youtube\.com|youtube-nocookie\.com)/(?:embed/|v/|watch/?\?v=)?([\w-]{11})#iU';
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$result = preg_match( $pattern, $url, $matches );
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if ( ! $result ) {
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return false;
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}
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// exclude playlist.
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if ( 'videoseries' === $matches[1] ) {
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return false;
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}
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return $matches[1];
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}
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/**
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* Changes URL youtu.be/ID to youtube.com/embed/ID
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*
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* @param string $url URL to replace.
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* @return string Unchanged URL or modified URL.
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*/
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public function changeYoutubeUrlForYoutuDotBe( $url ) {
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$pattern = '#^(?:https?:)?(?://)?(?:www\.)?(?:youtu\.be)/(?:embed/|v/|watch/?\?v=)?([\w-]{11})#iU';
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$result = preg_match( $pattern, $url, $matches );
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if ( ! $result ) {
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return $url;
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}
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return 'https://www.youtube.com/embed/' . $matches[1];
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}
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/**
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* Cleans Youtube URL. Keeps only scheme, host and path.
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*
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* @param string $url URL to be cleaned.
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* @return string Cleaned URL
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*/
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public function cleanYoutubeUrl( $url ) {
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$parsed_url = wp_parse_url( $url, -1 );
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$scheme = isset( $parsed_url['scheme'] ) ? $parsed_url['scheme'] . '://' : '//';
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$host = isset( $parsed_url['host'] ) ? $parsed_url['host'] : '';
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$path = isset( $parsed_url['path'] ) ? $parsed_url['path'] : '';
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return $scheme . $host . $path;
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}
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}
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