setup(); } return self::$__instance; } /** * Silence is golden. */ private function __construct() {} /** * Register actions and filters, but only if basic Photon functions are available. * The basic functions are found in ./functions.photon.php. * * @uses add_action, add_filter * @return null */ private function setup() { if ( ! function_exists( 'jetpack_photon_url' ) ) return; // Images in post content and galleries add_filter( 'the_content', array( __CLASS__, 'filter_the_content' ), 999999 ); add_filter( 'get_post_galleries', array( __CLASS__, 'filter_the_galleries' ), 999999 ); add_filter( 'widget_media_image_instance', array( __CLASS__, 'filter_the_image_widget' ), 999999 ); // Core image retrieval add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 10, 3 ); // Responsive image srcset substitution add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_array' ), 10, 5 ); add_filter( 'wp_calculate_image_sizes', array( $this, 'filter_sizes' ), 1, 2 ); // Early so themes can still easily filter. // Helpers for maniuplated images add_action( 'wp_enqueue_scripts', array( $this, 'action_wp_enqueue_scripts' ), 9 ); } /** ** IN-CONTENT IMAGE MANIPULATION FUNCTIONS **/ /** * Match all images and any relevant tags in a block of HTML. * * @param string $content Some HTML. * @return array An array of $images matches, where $images[0] is * an array of full matches, and the link_url, img_tag, * and img_url keys are arrays of those matches. */ public static function parse_images_from_html( $content ) { $images = array(); if ( preg_match_all( '#(?:]+?href=["|\'](?P[^\s]+?)["|\'][^>]*?>\s*)?(?P]*?\s+?src=["|\'](?P[^\s]+?)["|\'].*?>){1}(?:\s*)?#is', $content, $images ) ) { foreach ( $images as $key => $unused ) { // Simplify the output as much as possible, mostly for confirming test results. if ( is_numeric( $key ) && $key > 0 ) unset( $images[$key] ); } return $images; } return array(); } /** * Try to determine height and width from strings WP appends to resized image filenames. * * @param string $src The image URL. * @return array An array consisting of width and height. */ public static function parse_dimensions_from_filename( $src ) { $width_height_string = array(); if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode('|', self::$extensions ) . '){1}$#i', $src, $width_height_string ) ) { $width = (int) $width_height_string[1]; $height = (int) $width_height_string[2]; if ( $width && $height ) return array( $width, $height ); } return array( false, false ); } /** * Identify images in post content, and if images are local (uploaded to the current site), pass through Photon. * * @param string $content * @uses self::validate_image_url, apply_filters, jetpack_photon_url, esc_url * @filter the_content * @return string */ public static function filter_the_content( $content ) { $images = Jetpack_Photon::parse_images_from_html( $content ); if ( ! empty( $images ) ) { $content_width = Jetpack::get_content_width(); $image_sizes = self::image_sizes(); $upload_dir = wp_get_upload_dir(); foreach ( $images[0] as $index => $tag ) { // Default to resize, though fit may be used in certain cases where a dimension cannot be ascertained $transform = 'resize'; // Start with a clean attachment ID each time $attachment_id = false; // Flag if we need to munge a fullsize URL $fullsize_url = false; // Identify image source $src = $src_orig = $images['img_url'][ $index ]; /** * Allow specific images to be skipped by Photon. * * @module photon * * @since 2.0.3 * * @param bool false Should Photon ignore this image. Default to false. * @param string $src Image URL. * @param string $tag Image Tag (Image HTML output). */ if ( apply_filters( 'jetpack_photon_skip_image', false, $src, $tag ) ) continue; // Support Automattic's Lazy Load plugin // Can't modify $tag yet as we need unadulterated version later if ( preg_match( '#data-lazy-src=["|\'](.+?)["|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) { $placeholder_src = $placeholder_src_orig = $src; $src = $src_orig = $lazy_load_src[1]; } elseif ( preg_match( '#data-lazy-original=["|\'](.+?)["|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) { $placeholder_src = $placeholder_src_orig = $src; $src = $src_orig = $lazy_load_src[1]; } // Check if image URL should be used with Photon if ( self::validate_image_url( $src ) ) { // Find the width and height attributes $width = $height = false; // First, check the image tag if ( preg_match( '#width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) $width = $width_string[1]; if ( preg_match( '#height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) $height = $height_string[1]; // Can't pass both a relative width and height, so unset the height in favor of not breaking the horizontal layout. if ( false !== strpos( $width, '%' ) && false !== strpos( $height, '%' ) ) $width = $height = false; // Detect WP registered image size from HTML class if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) { $size = array_pop( $size ); if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) { $width = (int) $image_sizes[ $size ]['width']; $height = (int) $image_sizes[ $size ]['height']; $transform = $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; } } else { unset( $size ); } // WP Attachment ID, if uploaded to this site if ( preg_match( '#class=["|\']?[^"\']*wp-image-([\d]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $attachment_id ) && 0 === strpos( $src, $upload_dir['baseurl'] ) && /** * Filter whether an image using an attachment ID in its class has to be uploaded to the local site to go through Photon. * * @module photon * * @since 2.0.3 * * @param bool false Was the image uploaded to the local site. Default to false. * @param array $args { * Array of image details. * * @type $src Image URL. * @type tag Image tag (Image HTML output). * @type $images Array of information about the image. * @type $index Image index. * } */ apply_filters( 'jetpack_photon_image_is_local', false, compact( 'src', 'tag', 'images', 'index' ) ) ) { $attachment_id = intval( array_pop( $attachment_id ) ); if ( $attachment_id ) { $attachment = get_post( $attachment_id ); // Basic check on returned post object if ( is_object( $attachment ) && ! is_wp_error( $attachment ) && 'attachment' == $attachment->post_type ) { $src_per_wp = wp_get_attachment_image_src( $attachment_id, isset( $size ) ? $size : 'full' ); if ( self::validate_image_url( $src_per_wp[0] ) ) { $src = $src_per_wp[0]; $fullsize_url = true; // Prevent image distortion if a detected dimension exceeds the image's natural dimensions if ( ( false !== $width && $width > $src_per_wp[1] ) || ( false !== $height && $height > $src_per_wp[2] ) ) { $width = false === $width ? false : min( $width, $src_per_wp[1] ); $height = false === $height ? false : min( $height, $src_per_wp[2] ); } // If no width and height are found, max out at source image's natural dimensions // Otherwise, respect registered image sizes' cropping setting if ( false === $width && false === $height ) { $width = $src_per_wp[1]; $height = $src_per_wp[2]; $transform = 'fit'; } elseif ( isset( $size ) && array_key_exists( $size, $image_sizes ) && isset( $image_sizes[ $size ]['crop'] ) ) { $transform = (bool) $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; } } } else { unset( $attachment_id ); unset( $attachment ); } } } // If image tag lacks width and height arguments, try to determine from strings WP appends to resized image filenames. if ( false === $width && false === $height ) { list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $src ); } // If width is available, constrain to $content_width if ( false !== $width && false === strpos( $width, '%' ) && is_numeric( $content_width ) ) { if ( $width > $content_width && false !== $height && false === strpos( $height, '%' ) ) { $height = round( ( $content_width * $height ) / $width ); $width = $content_width; } elseif ( $width > $content_width ) { $width = $content_width; } } // Set a width if none is found and $content_width is available // If width is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing if ( false === $width && is_numeric( $content_width ) ) { $width = (int) $content_width; if ( false !== $height ) $transform = 'fit'; } // Detect if image source is for a custom-cropped thumbnail and prevent further URL manipulation. if ( ! $fullsize_url && preg_match_all( '#-e[a-z0-9]+(-\d+x\d+)?\.(' . implode('|', self::$extensions ) . '){1}$#i', basename( $src ), $filename ) ) $fullsize_url = true; // Build URL, first maybe removing WP's resized string so we pass the original image to Photon if ( ! $fullsize_url ) { $src = self::strip_image_dimensions_maybe( $src ); } // Build array of Photon args and expose to filter before passing to Photon URL function $args = array(); if ( false !== $width && false !== $height && false === strpos( $width, '%' ) && false === strpos( $height, '%' ) ) $args[ $transform ] = $width . ',' . $height; elseif ( false !== $width ) $args['w'] = $width; elseif ( false !== $height ) $args['h'] = $height; /** * Filter the array of Photon arguments added to an image when it goes through Photon. * By default, only includes width and height values. * @see https://developer.wordpress.com/docs/photon/api/ * * @module photon * * @since 2.0.0 * * @param array $args Array of Photon Arguments. * @param array $args { * Array of image details. * * @type $tag Image tag (Image HTML output). * @type $src Image URL. * @type $src_orig Original Image URL. * @type $width Image width. * @type $height Image height. * } */ $args = apply_filters( 'jetpack_photon_post_image_args', $args, compact( 'tag', 'src', 'src_orig', 'width', 'height' ) ); $photon_url = jetpack_photon_url( $src, $args ); // Modify image tag if Photon function provides a URL // Ensure changes are only applied to the current image by copying and modifying the matched tag, then replacing the entire tag with our modified version. if ( $src != $photon_url ) { $new_tag = $tag; // If present, replace the link href with a Photoned URL for the full-size image. if ( ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) $new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $new_tag, 1 ); // Supplant the original source value with our Photon URL $photon_url = esc_url( $photon_url ); $new_tag = str_replace( $src_orig, $photon_url, $new_tag ); // If Lazy Load is in use, pass placeholder image through Photon if ( isset( $placeholder_src ) && self::validate_image_url( $placeholder_src ) ) { $placeholder_src = jetpack_photon_url( $placeholder_src ); if ( $placeholder_src != $placeholder_src_orig ) $new_tag = str_replace( $placeholder_src_orig, esc_url( $placeholder_src ), $new_tag ); unset( $placeholder_src ); } // If we are not transforming the image with resize, fit, or letterbox (lb), then we should remove // the width and height arguments from the image to prevent distortion. Even if $args['w'] and $args['h'] // are present, Photon does not crop to those dimensions. Instead, it appears to favor height. // // If we are transforming the image via one of those methods, let's update the width and height attributes. if ( empty( $args['resize'] ) && empty( $args['fit'] ) && empty( $args['lb'] ) ) { $new_tag = preg_replace( '#(?<=\s)(width|height)=["|\']?[\d%]+["|\']?\s?#i', '', $new_tag ); } else { $resize_args = isset( $args['resize'] ) ? $args['resize'] : false; if ( false == $resize_args ) { $resize_args = ( ! $resize_args && isset( $args['fit'] ) ) ? $args['fit'] : false; } if ( false == $resize_args ) { $resize_args = ( ! $resize_args && isset( $args['lb'] ) ) ? $args['lb'] : false; } $resize_args = array_map( 'trim', explode( ',', $resize_args ) ); // (?<=\s) - Ensure width or height attribute is preceded by a space // (width=["|\']?) - Matches, and captures, width=, width=", or width=' // [\d%]+ - Matches 1 or more digits // (["|\']?) - Matches, and captures, ", ', or empty string // \s - Ensures there's a space after the attribute $new_tag = preg_replace( '#(?<=\s)(width=["|\']?)[\d%]+(["|\']?)\s?#i', sprintf( '${1}%d${2} ', $resize_args[0] ), $new_tag ); $new_tag = preg_replace( '#(?<=\s)(height=["|\']?)[\d%]+(["|\']?)\s?#i', sprintf( '${1}%d${2} ', $resize_args[1] ), $new_tag ); } // Tag an image for dimension checking $new_tag = preg_replace( '#(\s?/)?>(\s*)?$#i', ' data-recalc-dims="1"\1>\2', $new_tag ); // Replace original tag with modified version $content = str_replace( $tag, $new_tag, $content ); } } elseif ( preg_match( '#^http(s)?://i[\d]{1}.wp.com#', $src ) && ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) { $new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $tag, 1 ); $content = str_replace( $tag, $new_tag, $content ); } } } return $content; } public static function filter_the_galleries( $galleries ) { if ( empty( $galleries ) || ! is_array( $galleries ) ) { return $galleries; } // Pass by reference, so we can modify them in place. foreach ( $galleries as &$this_gallery ) { if ( is_string( $this_gallery ) ) { $this_gallery = self::filter_the_content( $this_gallery ); // LEAVING COMMENTED OUT as for the moment it doesn't seem // necessary and I'm not sure how it would propagate through. // } elseif ( is_array( $this_gallery ) // && ! empty( $this_gallery['src'] ) // && ! empty( $this_gallery['type'] ) // && in_array( $this_gallery['type'], array( 'rectangle', 'square', 'circle' ) ) ) { // $this_gallery['src'] = array_map( 'jetpack_photon_url', $this_gallery['src'] ); } } unset( $this_gallery ); // break the reference. return $galleries; } /** * Runs the image widget through photon. * * @param array $instance Image widget instance data. * @return array */ public static function filter_the_image_widget( $instance ) { if ( Jetpack::is_module_active( 'photon' ) && ! $instance['attachment_id'] && $instance['url'] ) { jetpack_photon_url( $instance['url'], array( 'w' => $instance['width'], 'h' => $instance['height'], ) ); } return $instance; } /** ** CORE IMAGE RETRIEVAL **/ /** * Filter post thumbnail image retrieval, passing images through Photon * * @param string|bool $image * @param int $attachment_id * @param string|array $size * @uses is_admin, apply_filters, wp_get_attachment_url, self::validate_image_url, this::image_sizes, jetpack_photon_url * @filter image_downsize * @return string|bool */ public function filter_image_downsize( $image, $attachment_id, $size ) { // Don't foul up the admin side of things, unless a plugin wants to. if ( is_admin() && /** * Provide plugins a way of running Photon for images in the WordPress Dashboard (wp-admin). * * Note: enabling this will result in Photon URLs added to your post content, which could make migrations across domains (and off Photon) a bit more challenging. * * @module photon * * @since 4.8.0 * * @param bool false Stop Photon from being run on the Dashboard. Default to false. * @param array $args { * Array of image details. * * @type $image Image URL. * @type $attachment_id Attachment ID of the image. * @type $size Image size. Can be a string (name of the image size, e.g. full) or an array of width and height. * } */ false === apply_filters( 'jetpack_photon_admin_allow_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) ) { return $image; } /** * Provide plugins a way of preventing Photon from being applied to images retrieved from WordPress Core. * * @module photon * * @since 2.0.0 * * @param bool false Stop Photon from being applied to the image. Default to false. * @param array $args { * Array of image details. * * @type $image Image URL. * @type $attachment_id Attachment ID of the image. * @type $size Image size. Can be a string (name of the image size, e.g. full) or an array of width and height. * } */ if ( apply_filters( 'jetpack_photon_override_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) ) { return $image; } // Get the image URL and proceed with Photon-ification if successful $image_url = wp_get_attachment_url( $attachment_id ); // Set this to true later when we know we have size meta. $has_size_meta = false; if ( $image_url ) { // Check if image URL should be used with Photon if ( ! self::validate_image_url( $image_url ) ) return $image; $intermediate = true; // For the fourth array item returned by the image_downsize filter. // If an image is requested with a size known to WordPress, use that size's settings with Photon. // WP states that `add_image_size()` should use a string for the name, but doesn't enforce that. // Due to differences in how Core and Photon check for the registered image size, we check both types. if ( ( is_string( $size ) || is_int( $size ) ) && array_key_exists( $size, self::image_sizes() ) ) { $image_args = self::image_sizes(); $image_args = $image_args[ $size ]; $photon_args = array(); $image_meta = image_get_intermediate_size( $attachment_id, $size ); // 'full' is a special case: We need consistent data regardless of the requested size. if ( 'full' == $size ) { $image_meta = wp_get_attachment_metadata( $attachment_id ); $intermediate = false; } elseif ( ! $image_meta ) { // If we still don't have any image meta at this point, it's probably from a custom thumbnail size // for an image that was uploaded before the custom image was added to the theme. Try to determine the size manually. $image_meta = wp_get_attachment_metadata( $attachment_id ); if ( isset( $image_meta['width'], $image_meta['height'] ) ) { $image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $image_args['width'], $image_args['height'], $image_args['crop'] ); if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image. $image_meta['width'] = $image_resized[6]; $image_meta['height'] = $image_resized[7]; } } } if ( isset( $image_meta['width'], $image_meta['height'] ) ) { $image_args['width'] = $image_meta['width']; $image_args['height'] = $image_meta['height']; list( $image_args['width'], $image_args['height'] ) = image_constrain_size_for_editor( $image_args['width'], $image_args['height'], $size, 'display' ); $has_size_meta = true; } // Expose determined arguments to a filter before passing to Photon $transform = $image_args['crop'] ? 'resize' : 'fit'; // Check specified image dimensions and account for possible zero values; photon fails to resize if a dimension is zero. if ( 0 == $image_args['width'] || 0 == $image_args['height'] ) { if ( 0 == $image_args['width'] && 0 < $image_args['height'] ) { $photon_args['h'] = $image_args['height']; } elseif ( 0 == $image_args['height'] && 0 < $image_args['width'] ) { $photon_args['w'] = $image_args['width']; } } else { if ( ( 'resize' === $transform ) && $image_meta = wp_get_attachment_metadata( $attachment_id ) ) { if ( isset( $image_meta['width'], $image_meta['height'] ) ) { // Lets make sure that we don't upscale images since wp never upscales them as well $smaller_width = ( ( $image_meta['width'] < $image_args['width'] ) ? $image_meta['width'] : $image_args['width'] ); $smaller_height = ( ( $image_meta['height'] < $image_args['height'] ) ? $image_meta['height'] : $image_args['height'] ); $photon_args[ $transform ] = $smaller_width . ',' . $smaller_height; } } else { $photon_args[ $transform ] = $image_args['width'] . ',' . $image_args['height']; } } /** * Filter the Photon Arguments added to an image when going through Photon, when that image size is a string. * Image size will be a string (e.g. "full", "medium") when it is known to WordPress. * * @module photon * * @since 2.0.0 * * @param array $photon_args Array of Photon arguments. * @param array $args { * Array of image details. * * @type $image_args Array of Image arguments (width, height, crop). * @type $image_url Image URL. * @type $attachment_id Attachment ID of the image. * @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer. * @type $transform Value can be resize or fit. * @see https://developer.wordpress.com/docs/photon/api * } */ $photon_args = apply_filters( 'jetpack_photon_image_downsize_string', $photon_args, compact( 'image_args', 'image_url', 'attachment_id', 'size', 'transform' ) ); // Generate Photon URL $image = array( jetpack_photon_url( $image_url, $photon_args ), $has_size_meta ? $image_args['width'] : false, $has_size_meta ? $image_args['height'] : false, $intermediate ); } elseif ( is_array( $size ) ) { // Pull width and height values from the provided array, if possible $width = isset( $size[0] ) ? (int) $size[0] : false; $height = isset( $size[1] ) ? (int) $size[1] : false; // Don't bother if necessary parameters aren't passed. if ( ! $width || ! $height ) { return $image; } $image_meta = wp_get_attachment_metadata( $attachment_id ); if ( isset( $image_meta['width'], $image_meta['height'] ) ) { $image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $width, $height ); if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image. $width = $image_resized[6]; $height = $image_resized[7]; } else { $width = $image_meta['width']; $height = $image_meta['height']; } $has_size_meta = true; } list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size ); // Expose arguments to a filter before passing to Photon $photon_args = array( 'fit' => $width . ',' . $height ); /** * Filter the Photon Arguments added to an image when going through Photon, * when the image size is an array of height and width values. * * @module photon * * @since 2.0.0 * * @param array $photon_args Array of Photon arguments. * @param array $args { * Array of image details. * * @type $width Image width. * @type height Image height. * @type $image_url Image URL. * @type $attachment_id Attachment ID of the image. * } */ $photon_args = apply_filters( 'jetpack_photon_image_downsize_array', $photon_args, compact( 'width', 'height', 'image_url', 'attachment_id' ) ); // Generate Photon URL $image = array( jetpack_photon_url( $image_url, $photon_args ), $has_size_meta ? $width : false, $has_size_meta ? $height : false, $intermediate ); } } return $image; } /** * Filters an array of image `srcset` values, replacing each URL with its Photon equivalent. * * @since 3.8.0 * @since 4.0.4 Added automatically additional sizes beyond declared image sizes. * @param array $sources An array of image urls and widths. * @uses self::validate_image_url, jetpack_photon_url, Jetpack_Photon::parse_from_filename * @uses Jetpack_Photon::strip_image_dimensions_maybe, Jetpack::get_content_width * @return array An array of Photon image urls and widths. */ public function filter_srcset_array( $sources = array(), $size_array = array(), $image_src = array(), $image_meta = array(), $attachment_id = 0 ) { if ( ! is_array( $sources ) ) { return $sources; } $upload_dir = wp_get_upload_dir(); foreach ( $sources as $i => $source ) { if ( ! self::validate_image_url( $source['url'] ) ) { continue; } /** This filter is already documented in class.photon.php */ if ( apply_filters( 'jetpack_photon_skip_image', false, $source['url'], $source ) ) { continue; } $url = $source['url']; list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $url ); // It's quicker to get the full size with the data we have already, if available if ( ! empty( $attachment_id ) ) { $url = wp_get_attachment_url( $attachment_id ); } else { $url = Jetpack_Photon::strip_image_dimensions_maybe( $url ); } $args = array(); if ( 'w' === $source['descriptor'] ) { if ( $height && ( $source['value'] == $width ) ) { $args['resize'] = $width . ',' . $height; } else { $args['w'] = $source['value']; } } $sources[ $i ]['url'] = jetpack_photon_url( $url, $args ); } /** * At this point, $sources is the original srcset with Photonized URLs. * Now, we're going to construct additional sizes based on multiples of the content_width. * This will reduce the gap between the largest defined size and the original image. */ /** * Filter the multiplier Photon uses to create new srcset items. * Return false to short-circuit and bypass auto-generation. * * @module photon * * @since 4.0.4 * * @param array|bool $multipliers Array of multipliers to use or false to bypass. */ $multipliers = apply_filters( 'jetpack_photon_srcset_multipliers', array( 2, 3 ) ); $url = trailingslashit( $upload_dir['baseurl'] ) . $image_meta['file']; if ( /** Short-circuit via jetpack_photon_srcset_multipliers filter. */ is_array( $multipliers ) /** This filter is already documented in class.photon.php */ && ! apply_filters( 'jetpack_photon_skip_image', false, $url, null ) /** Verify basic meta is intact. */ && isset( $image_meta['width'] ) && isset( $image_meta['height'] ) && isset( $image_meta['file'] ) /** Verify we have the requested width/height. */ && isset( $size_array[0] ) && isset( $size_array[1] ) ) { $fullwidth = $image_meta['width']; $fullheight = $image_meta['height']; $reqwidth = $size_array[0]; $reqheight = $size_array[1]; $constrained_size = wp_constrain_dimensions( $fullwidth, $fullheight, $reqwidth ); $expected_size = array( $reqwidth, $reqheight ); if ( abs( $constrained_size[0] - $expected_size[0] ) <= 1 && abs( $constrained_size[1] - $expected_size[1] ) <= 1 ) { $crop = 'soft'; $base = Jetpack::get_content_width() ? Jetpack::get_content_width() : 1000; // Provide a default width if none set by the theme. } else { $crop = 'hard'; $base = $reqwidth; } $currentwidths = array_keys( $sources ); $newsources = null; foreach ( $multipliers as $multiplier ) { $newwidth = $base * $multiplier; foreach ( $currentwidths as $currentwidth ){ // If a new width would be within 100 pixes of an existing one or larger than the full size image, skip. if ( abs( $currentwidth - $newwidth ) < 50 || ( $newwidth > $fullwidth ) ) { continue 2; // Back to the foreach ( $multipliers as $multiplier ) } } // foreach ( $currentwidths as $currentwidth ){ if ( 'soft' == $crop ) { $args = array( 'w' => $newwidth, ); } else { // hard crop, e.g. add_image_size( 'example', 200, 200, true ); $args = array( 'zoom' => $multiplier, 'resize' => $reqwidth . ',' . $reqheight, ); } $newsources[ $newwidth ] = array( 'url' => jetpack_photon_url( $url, $args ), 'descriptor' => 'w', 'value' => $newwidth, ); } // foreach ( $multipliers as $multiplier ) if ( is_array( $newsources ) ) { if ( function_exists( 'array_replace' ) ) { // PHP 5.3+, preferred $sources = array_replace( $sources, $newsources ); } else { // For PHP 5.2 using WP shim function $sources = array_replace_recursive( $sources, $newsources ); } } } // if ( isset( $image_meta['width'] ) && isset( $image_meta['file'] ) ) return $sources; } /** * Filters an array of image `sizes` values, using $content_width instead of image's full size. * * @since 4.0.4 * @since 4.1.0 Returns early for images not within the_content. * @param array $sizes An array of media query breakpoints. * @param array $size Width and height of the image * @uses Jetpack::get_content_width * @return array An array of media query breakpoints. */ public function filter_sizes( $sizes, $size ) { if ( ! doing_filter( 'the_content' ) ){ return $sizes; } $content_width = Jetpack::get_content_width(); if ( ! $content_width ) { $content_width = 1000; } if ( ( is_array( $size ) && $size[0] < $content_width ) ) { return $sizes; } return sprintf( '(max-width: %1$dpx) 100vw, %1$dpx', $content_width ); } /** ** GENERAL FUNCTIONS **/ /** * Ensure image URL is valid for Photon. * Though Photon functions address some of the URL issues, we should avoid unnecessary processing if we know early on that the image isn't supported. * * @param string $url * @uses wp_parse_args * @return bool */ protected static function validate_image_url( $url ) { $parsed_url = @parse_url( $url ); if ( ! $parsed_url ) return false; // Parse URL and ensure needed keys exist, since the array returned by `parse_url` only includes the URL components it finds. $url_info = wp_parse_args( $parsed_url, array( 'scheme' => null, 'host' => null, 'port' => null, 'path' => null ) ); // Bail if scheme isn't http or port is set that isn't port 80 if ( ( 'http' != $url_info['scheme'] || ! in_array( $url_info['port'], array( 80, null ) ) ) && /** * Allow Photon to fetch images that are served via HTTPS. * * @module photon * * @since 2.4.0 * @since 3.9.0 Default to false. * * @param bool $reject_https Should Photon ignore images using the HTTPS scheme. Default to false. */ apply_filters( 'jetpack_photon_reject_https', false ) ) { return false; } // Bail if no host is found if ( is_null( $url_info['host'] ) ) return false; // Bail if the image alredy went through Photon if ( preg_match( '#^i[\d]{1}.wp.com$#i', $url_info['host'] ) ) return false; // Bail if no path is found if ( is_null( $url_info['path'] ) ) return false; // Ensure image extension is acceptable if ( ! in_array( strtolower( pathinfo( $url_info['path'], PATHINFO_EXTENSION ) ), self::$extensions ) ) return false; // If we got this far, we should have an acceptable image URL // But let folks filter to decline if they prefer. /** * Overwrite the results of the validation steps an image goes through before to be considered valid to be used by Photon. * * @module photon * * @since 3.0.0 * * @param bool true Is the image URL valid and can it be used by Photon. Default to true. * @param string $url Image URL. * @param array $parsed_url Array of information about the image. */ return apply_filters( 'photon_validate_image_url', true, $url, $parsed_url ); } /** * Checks if the file exists before it passes the file to photon * * @param string $src The image URL * @return string **/ protected static function strip_image_dimensions_maybe( $src ){ $stripped_src = $src; // Build URL, first removing WP's resized string so we pass the original image to Photon if ( preg_match( '#(-\d+x\d+)\.(' . implode('|', self::$extensions ) . '){1}$#i', $src, $src_parts ) ) { $stripped_src = str_replace( $src_parts[1], '', $src ); $upload_dir = wp_get_upload_dir(); // Extracts the file path to the image minus the base url $file_path = substr( $stripped_src, strlen ( $upload_dir['baseurl'] ) ); if( file_exists( $upload_dir["basedir"] . $file_path ) ) $src = $stripped_src; } return $src; } /** * Provide an array of available image sizes and corresponding dimensions. * Similar to get_intermediate_image_sizes() except that it includes image sizes' dimensions, not just their names. * * @global $wp_additional_image_sizes * @uses get_option * @return array */ protected static function image_sizes() { if ( null == self::$image_sizes ) { global $_wp_additional_image_sizes; // Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes $images = array( 'thumb' => array( 'width' => intval( get_option( 'thumbnail_size_w' ) ), 'height' => intval( get_option( 'thumbnail_size_h' ) ), 'crop' => (bool) get_option( 'thumbnail_crop' ) ), 'medium' => array( 'width' => intval( get_option( 'medium_size_w' ) ), 'height' => intval( get_option( 'medium_size_h' ) ), 'crop' => false ), 'large' => array( 'width' => intval( get_option( 'large_size_w' ) ), 'height' => intval( get_option( 'large_size_h' ) ), 'crop' => false ), 'full' => array( 'width' => null, 'height' => null, 'crop' => false ) ); // Compatibility mapping as found in wp-includes/media.php $images['thumbnail'] = $images['thumb']; // Update class variable, merging in $_wp_additional_image_sizes if any are set if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes ); else self::$image_sizes = $images; } return is_array( self::$image_sizes ) ? self::$image_sizes : array(); } /** * Pass og:image URLs through Photon * * @param array $tags * @param array $parameters * @uses jetpack_photon_url * @return array */ function filter_open_graph_tags( $tags, $parameters ) { if ( empty( $tags['og:image'] ) ) { return $tags; } $photon_args = array( 'fit' => sprintf( '%d,%d', 2 * $parameters['image_width'], 2 * $parameters['image_height'] ), ); if ( is_array( $tags['og:image'] ) ) { $images = array(); foreach ( $tags['og:image'] as $image ) { $images[] = jetpack_photon_url( $image, $photon_args ); } $tags['og:image'] = $images; } else { $tags['og:image'] = jetpack_photon_url( $tags['og:image'], $photon_args ); } return $tags; } /** * Enqueue Photon helper script * * @uses wp_enqueue_script, plugins_url * @action wp_enqueue_script * @return null */ public function action_wp_enqueue_scripts() { if ( Jetpack_AMP_Support::is_amp_request() ) { return; } wp_enqueue_script( 'jetpack-photon', Jetpack::get_file_url_for_environment( '_inc/build/photon/photon.min.js', 'modules/photon/photon.js' ), array( 'jquery' ), 20130122, true ); } }