post_password ) ) { return $images; } if ( false === has_shortcode( $post->post_content, 'slideshow' ) ) { return $images; // no slideshow - bail } $permalink = get_permalink( $post->ID ); // Mechanic: Somebody set us up the bomb $old_post = $GLOBALS['post']; $GLOBALS['post'] = $post; $old_shortcodes = $GLOBALS['shortcode_tags']; $GLOBALS['shortcode_tags'] = array( 'slideshow' => $old_shortcodes['slideshow'] ); // Find all the slideshows preg_match_all( '/' . get_shortcode_regex() . '/sx', $post->post_content, $slideshow_matches, PREG_SET_ORDER ); ob_start(); // The slideshow shortcode handler calls wp_print_scripts and wp_print_styles... not too happy about that foreach ( $slideshow_matches as $slideshow_match ) { $slideshow = do_shortcode_tag( $slideshow_match ); if ( false === $pos = stripos( $slideshow, 'jetpack-slideshow' ) ) // must be something wrong - or we changed the output format in which case none of the following will work continue; $start = strpos( $slideshow, '[', $pos ); $end = strpos( $slideshow, ']', $start ); $post_images = json_decode( wp_specialchars_decode( str_replace( "'", '"', substr( $slideshow, $start, $end - $start + 1 ) ), ENT_QUOTES ) ); // parse via JSON foreach ( $post_images as $post_image ) { if ( !$post_image_id = absint( $post_image->id ) ) continue; $meta = wp_get_attachment_metadata( $post_image_id ); // Must be larger than 200x200 (or user-specified) if ( !isset( $meta['width'] ) || $meta['width'] < $width ) continue; if ( !isset( $meta['height'] ) || $meta['height'] < $height ) continue; $url = wp_get_attachment_url( $post_image_id ); $images[] = array( 'type' => 'image', 'from' => 'slideshow', 'src' => $url, 'src_width' => $meta['width'], 'src_height' => $meta['height'], 'href' => $permalink, ); } } ob_end_clean(); // Operator: Main screen turn on $GLOBALS['shortcode_tags'] = $old_shortcodes; $GLOBALS['post'] = $old_post; return $images; } /** * If a gallery is detected, then get all the images from it. */ static function from_gallery( $post_id ) { $images = array(); $post = get_post( $post_id ); if ( ! $post ) { return $images; } if ( ! empty( $post->post_password ) ) { return $images; } $permalink = get_permalink( $post->ID ); $galleries = get_post_galleries( $post->ID, false ); foreach ( $galleries as $gallery ) { if ( isset( $gallery['type'] ) && 'slideshow' === $gallery['type'] && ! empty( $gallery['ids'] ) ) { $image_ids = explode( ',', $gallery['ids'] ); $image_size = isset( $gallery['size'] ) ? $gallery['size'] : 'thumbnail'; foreach ( $image_ids as $image_id ) { $image = wp_get_attachment_image_src( $image_id, $image_size ); if ( ! empty( $image[0] ) ) { list( $raw_src ) = explode( '?', $image[0] ); // pull off any Query string (?w=250) $raw_src = wp_specialchars_decode( $raw_src ); // rawify it $raw_src = esc_url_raw( $raw_src ); // clean it $images[] = array( 'type' => 'image', 'from' => 'gallery', 'src' => $raw_src, 'href' => $permalink, ); } } } elseif ( ! empty( $gallery['src'] ) ) { foreach ( $gallery['src'] as $src ) { list( $raw_src ) = explode( '?', $src ); // pull off any Query string (?w=250) $raw_src = wp_specialchars_decode( $raw_src ); // rawify it $raw_src = esc_url_raw( $raw_src ); // clean it $images[] = array( 'type' => 'image', 'from' => 'gallery', 'src' => $raw_src, 'href' => $permalink, ); } } } return $images; } /** * Get attachment images for a specified post and return them. Also make sure * their dimensions are at or above a required minimum. */ static function from_attachment( $post_id, $width = 200, $height = 200 ) { $images = array(); $post = get_post( $post_id ); if ( ! empty( $post->post_password ) ) { return $images; } $post_images = get_posts( array( 'post_parent' => $post_id, // Must be children of post 'numberposts' => 5, // No more than 5 'post_type' => 'attachment', // Must be attachments 'post_mime_type' => 'image', // Must be images ) ); if ( ! $post_images ) { return $images; } $permalink = get_permalink( $post_id ); foreach ( $post_images as $post_image ) { $meta = wp_get_attachment_metadata( $post_image->ID ); // Must be larger than 200x200 if ( !isset( $meta['width'] ) || $meta['width'] < $width ) continue; if ( !isset( $meta['height'] ) || $meta['height'] < $height ) continue; $url = wp_get_attachment_url( $post_image->ID ); $images[] = array( 'type' => 'image', 'from' => 'attachment', 'src' => $url, 'src_width' => $meta['width'], 'src_height' => $meta['height'], 'href' => $permalink, ); } /* * We only want to pass back attached images that were actually inserted. * We can load up all the images found in the HTML source and then * compare URLs to see if an image is attached AND inserted. */ $html_images = self::from_html( $post_id ); $inserted_images = array(); foreach( $html_images as $html_image ) { $src = parse_url( $html_image['src'] ); // strip off any query strings from src if( ! empty( $src['scheme'] ) && ! empty( $src['host'] ) ) { $inserted_images[] = $src['scheme'] . '://' . $src['host'] . $src['path']; } elseif( ! empty( $src['host'] ) ) { $inserted_images[] = set_url_scheme( 'http://' . $src['host'] . $src['path'] ); } else { $inserted_images[] = site_url( '/' ) . $src['path']; } } foreach( $images as $i => $image ) { if ( !in_array( $image['src'], $inserted_images ) ) unset( $images[$i] ); } return $images; } /** * Check if a Featured Image is set for this post, and return it in a similar * format to the other images?_from_*() methods. * @param int $post_id The post ID to check * @return Array containing details of the Featured Image, or empty array if none. */ static function from_thumbnail( $post_id, $width = 200, $height = 200 ) { $images = array(); $post = get_post( $post_id ); if ( ! empty( $post->post_password ) ) { return $images; } if ( ! function_exists( 'get_post_thumbnail_id' ) ) { return $images; } $thumb = get_post_thumbnail_id( $post_id ); if ( $thumb ) { $meta = wp_get_attachment_metadata( $thumb ); // Must be larger than requested minimums if ( !isset( $meta['width'] ) || $meta['width'] < $width ) return $images; if ( !isset( $meta['height'] ) || $meta['height'] < $height ) return $images; $too_big = ( ( ! empty( $meta['width'] ) && $meta['width'] > 1200 ) || ( ! empty( $meta['height'] ) && $meta['height'] > 1200 ) ); if ( $too_big && ( ( method_exists( 'Jetpack', 'is_module_active' ) && Jetpack::is_module_active( 'photon' ) ) || ( defined( 'WPCOM' ) && IS_WPCOM ) ) ) { $img_src = wp_get_attachment_image_src( $thumb, array( 1200, 1200 ) ); } else { $img_src = wp_get_attachment_image_src( $thumb, 'full' ); } $url = $img_src[0]; $images = array( array( // Other methods below all return an array of arrays 'type' => 'image', 'from' => 'thumbnail', 'src' => $url, 'src_width' => $img_src[1], 'src_height' => $img_src[2], 'href' => get_permalink( $thumb ), ) ); } if ( empty( $images ) && ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ) { $meta_thumbnail = get_post_meta( $post_id, '_jetpack_post_thumbnail', true ); if ( ! empty( $meta_thumbnail ) ) { if ( ! isset( $meta_thumbnail['width'] ) || $meta_thumbnail['width'] < $width ) { return $images; } if ( ! isset( $meta_thumbnail['height'] ) || $meta_thumbnail['height'] < $height ) { return $images; } $images = array( array( // Other methods below all return an array of arrays 'type' => 'image', 'from' => 'thumbnail', 'src' => $meta_thumbnail['URL'], 'src_width' => $meta_thumbnail['width'], 'src_height' => $meta_thumbnail['height'], 'href' => $meta_thumbnail['URL'], ) ); } } return $images; } /** * Very raw -- just parse the HTML and pull out any/all img tags and return their src * @param mixed $html_or_id The HTML string to parse for images, or a post id * @return Array containing images */ static function from_html( $html_or_id ) { $images = array(); if ( is_numeric( $html_or_id ) ) { $post = get_post( $html_or_id ); if ( empty( $post ) || ! empty( $post->post_password ) ) { return $images; } $html = $post->post_content; // DO NOT apply the_content filters here, it will cause loops } else { $html = $html_or_id; } if ( ! $html ) { return $images; } preg_match_all( '!!iUs', $html, $matches ); if ( !empty( $matches[1] ) ) { foreach ( $matches[1] as $match ) { if ( stristr( $match, '/smilies/' ) ) continue; $images[] = array( 'type' => 'image', 'from' => 'html', 'src' => html_entity_decode( $match ), 'href' => '', // No link to apply to these. Might potentially parse for that as well, but not for now ); } } return $images; } /** * @param int $post_id The post ID to check * @param int $size * @return Array containing details of the image, or empty array if none. */ static function from_blavatar( $post_id, $size = 96 ) { $permalink = get_permalink( $post_id ); if ( function_exists( 'blavatar_domain' ) && function_exists( 'blavatar_exists' ) && function_exists( 'blavatar_url' ) ) { $domain = blavatar_domain( $permalink ); if ( ! blavatar_exists( $domain ) ) { return array(); } $url = blavatar_url( $domain, 'img', $size ); } elseif ( function_exists( 'jetpack_has_site_icon' ) && jetpack_has_site_icon() ) { $url = jetpack_site_icon_url( null, $size, $default = false ); } else { return array(); } return array( array( 'type' => 'image', 'from' => 'blavatar', 'src' => $url, 'src_width' => $size, 'src_height' => $size, 'href' => $permalink, ) ); } /** * @param int $post_id The post ID to check * @param int $size * @param string $default The default image to use. * @return Array containing details of the image, or empty array if none. */ static function from_gravatar( $post_id, $size = 96, $default = false ) { $post = get_post( $post_id ); $permalink = get_permalink( $post_id ); if ( function_exists( 'wpcom_get_avatar_url' ) ) { $url = wpcom_get_avatar_url( $post->post_author, $size, $default, true ); if ( $url && is_array( $url ) ) { $url = $url[0]; } } else { $has_filter = has_filter( 'pre_option_show_avatars', '__return_true' ); if ( !$has_filter ) { add_filter( 'pre_option_show_avatars', '__return_true' ); } $avatar = get_avatar( $post->post_author, $size, $default ); if ( !$has_filter ) { remove_filter( 'pre_option_show_avatars', '__return_true' ); } if ( !$avatar ) { return array(); } if ( !preg_match( '/src=["\']([^"\']+)["\']/', $avatar, $matches ) ) { return array(); } $url = wp_specialchars_decode( $matches[1], ENT_QUOTES ); } return array( array( 'type' => 'image', 'from' => 'gravatar', 'src' => $url, 'src_width' => $size, 'src_height' => $size, 'href' => $permalink, ) ); } /** * Run through the different methods that we have available to try to find a single good * display image for this post. * @param int $post_id * @param array $args Other arguments (currently width and height required for images where possible to determine) * @return Array containing details of the best image to be used */ static function get_image( $post_id, $args = array() ) { $image = ''; /** * Fires before we find a single good image for a specific post. * * @since 2.2.0 * * @param int $post_id Post ID. */ do_action( 'jetpack_postimages_pre_get_image', $post_id ); $media = self::get_images( $post_id, $args ); if ( is_array( $media ) ) { foreach ( $media as $item ) { if ( 'image' == $item['type'] ) { $image = $item; break; } } } /** * Fires after we find a single good image for a specific post. * * @since 2.2.0 * * @param int $post_id Post ID. */ do_action( 'jetpack_postimages_post_get_image', $post_id ); return $image; } /** * Get an array containing a collection of possible images for this post, stopping once we hit a method * that returns something useful. * @param int $post_id * @param array $args Optional args, see defaults list for details * @return Array containing images that would be good for representing this post */ static function get_images( $post_id, $args = array() ) { // Figure out which image to attach to this post. $media = false; /** * Filters the array of images that would be good for a specific post. * This filter is applied before options ($args) filter the original array. * * @since 2.0.0 * * @param array $media Array of images that would be good for a specific post. * @param int $post_id Post ID. * @param array $args Array of options to get images. */ $media = apply_filters( 'jetpack_images_pre_get_images', $media, $post_id, $args ); if ( $media ) return $media; $defaults = array( 'width' => 200, // Required minimum width (if possible to determine) 'height' => 200, // Required minimum height (if possible to determine) 'fallback_to_avatars' => false, // Optionally include Blavatar and Gravatar (in that order) in the image stack 'avatar_size' => 96, // Used for both Grav and Blav 'gravatar_default' => false, // Default image to use if we end up with no Gravatar 'from_thumbnail' => true, // Use these flags to specify which methods to use to find an image 'from_slideshow' => true, 'from_gallery' => true, 'from_attachment' => true, 'from_html' => true, 'html_content' => '' // HTML string to pass to from_html() ); $args = wp_parse_args( $args, $defaults ); $media = false; if ( $args['from_thumbnail'] ) $media = self::from_thumbnail( $post_id, $args['width'], $args['height'] ); if ( !$media && $args['from_slideshow'] ) $media = self::from_slideshow( $post_id, $args['width'], $args['height'] ); if ( !$media && $args['from_gallery'] ) $media = self::from_gallery( $post_id ); if ( !$media && $args['from_attachment'] ) $media = self::from_attachment( $post_id, $args['width'], $args['height'] ); if ( !$media && $args['from_html'] ) { if ( empty( $args['html_content'] ) ) $media = self::from_html( $post_id ); // Use the post_id, which will load the content else $media = self::from_html( $args['html_content'] ); // If html_content is provided, use that } if ( !$media && $args['fallback_to_avatars'] ) { $media = self::from_blavatar( $post_id, $args['avatar_size'] ); if ( !$media ) $media = self::from_gravatar( $post_id, $args['avatar_size'], $args['gravatar_default'] ); } /** * Filters the array of images that would be good for a specific post. * This filter is applied after options ($args) filter the original array. * * @since 2.0.0 * * @param array $media Array of images that would be good for a specific post. * @param int $post_id Post ID. * @param array $args Array of options to get images. */ return apply_filters( 'jetpack_images_get_images', $media, $post_id, $args ); } /** * Takes an image URL and pixel dimensions then returns a URL for the * resized and croped image. * * @param string $src * @param int $dimension * @return string Transformed image URL */ static function fit_image_url( $src, $width, $height ) { $width = (int) $width; $height = (int) $height; // Umm... if ( $width < 1 || $height < 1 ) { return $src; } // See if we should bypass WordPress.com SaaS resizing if ( has_filter( 'jetpack_images_fit_image_url_override' ) ) { /** * Filters the image URL used after dimensions are set by Photon. * * @since 3.3.0 * * @param string $src Image URL. * @param int $width Image width. * @param int $width Image height. */ return apply_filters( 'jetpack_images_fit_image_url_override', $src, $width, $height ); } // If WPCOM hosted image use native transformations $img_host = parse_url( $src, PHP_URL_HOST ); if ( '.files.wordpress.com' == substr( $img_host, -20 ) ) { return add_query_arg( array( 'w' => $width, 'h' => $height, 'crop' => 1 ), $src ); } // Use Photon magic if( function_exists( 'jetpack_photon_url' ) ) { return jetpack_photon_url( $src, array( 'resize' => "$width,$height" ) ); } // Arg... no way to resize image using WordPress.com infrastructure! return $src; } }