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<?php |
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class Jetpack_Photon { |
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/** |
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* Class variables |
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*/ |
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// Oh look, a singleton |
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private static $__instance = null; |
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// Allowed extensions must match http://code.trac.wordpress.org/browser/photon/index.php#L31 |
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protected static $extensions = array( |
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'gif', |
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'jpg', |
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'jpeg', |
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'png' |
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); |
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// Don't access this directly. Instead, use self::image_sizes() so it's actually populated with something. |
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protected static $image_sizes = null; |
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/** |
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* Singleton implementation |
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* |
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* @return object |
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*/ |
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public static function instance() { |
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if ( ! is_a( self::$__instance, 'Jetpack_Photon' ) ) { |
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self::$__instance = new Jetpack_Photon; |
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self::$__instance->setup(); |
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} |
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return self::$__instance; |
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} |
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/** |
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* Silence is golden. |
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*/ |
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private function __construct() {} |
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/** |
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* Register actions and filters, but only if basic Photon functions are available. |
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* The basic functions are found in ./functions.photon.php. |
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* |
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* @uses add_action, add_filter |
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* @return null |
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*/ |
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private function setup() { |
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// Display warning if site is private |
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add_action( 'jetpack_activate_module_photon', array( $this, 'action_jetpack_activate_module_photon' ) ); |
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if ( ! function_exists( 'jetpack_photon_url' ) ) |
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return; |
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// Images in post content and galleries |
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add_filter( 'the_content', array( __CLASS__, 'filter_the_content' ), 999999 ); |
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add_filter( 'get_post_galleries', array( __CLASS__, 'filter_the_galleries' ), 999999 ); |
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// Core image retrieval |
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add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 10, 3 ); |
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// Responsive image srcset substitution |
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add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_array' ), 10, 4 ); |
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// Helpers for maniuplated images |
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add_action( 'wp_enqueue_scripts', array( $this, 'action_wp_enqueue_scripts' ), 9 ); |
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} |
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/** |
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* Check if site is private and warn user if it is |
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* |
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* @uses Jetpack::check_privacy |
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* @action jetpack_activate_module_photon |
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* @return null |
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*/ |
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public function action_jetpack_activate_module_photon() { |
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Jetpack::check_privacy( __FILE__ ); |
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} |
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/** |
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** IN-CONTENT IMAGE MANIPULATION FUNCTIONS |
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**/ |
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/** |
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* Match all images and any relevant <a> tags in a block of HTML. |
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* |
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* @param string $content Some HTML. |
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* @return array An array of $images matches, where $images[0] is |
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* an array of full matches, and the link_url, img_tag, |
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* and img_url keys are arrays of those matches. |
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*/ |
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public static function parse_images_from_html( $content ) { |
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$images = array(); |
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if ( preg_match_all( '#(?:<a[^>]+?href=["|\'](?P<link_url>[^\s]+?)["|\'][^>]*?>\s*)?(?P<img_tag><img[^>]+?src=["|\'](?P<img_url>[^\s]+?)["|\'].*?>){1}(?:\s*</a>)?#is', $content, $images ) ) { |
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foreach ( $images as $key => $unused ) { |
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// Simplify the output as much as possible, mostly for confirming test results. |
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if ( is_numeric( $key ) && $key > 0 ) |
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unset( $images[$key] ); |
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} |
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return $images; |
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} |
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return array(); |
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} |
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/** |
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* Try to determine height and width from strings WP appends to resized image filenames. |
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* |
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* @param string $src The image URL. |
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* @return array An array consisting of width and height. |
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*/ |
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public static function parse_dimensions_from_filename( $src ) { |
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$width_height_string = array(); |
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if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode('|', self::$extensions ) . '){1}$#i', $src, $width_height_string ) ) { |
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$width = (int) $width_height_string[1]; |
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$height = (int) $width_height_string[2]; |
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if ( $width && $height ) |
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return array( $width, $height ); |
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} |
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return array( false, false ); |
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} |
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/** |
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* Identify images in post content, and if images are local (uploaded to the current site), pass through Photon. |
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* |
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* @param string $content |
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* @uses self::validate_image_url, apply_filters, jetpack_photon_url, esc_url |
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* @filter the_content |
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* @return string |
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*/ |
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public static function filter_the_content( $content ) { |
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$images = Jetpack_Photon::parse_images_from_html( $content ); |
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if ( ! empty( $images ) ) { |
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$content_width = Jetpack::get_content_width(); |
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$image_sizes = self::image_sizes(); |
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$upload_dir = wp_upload_dir(); |
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foreach ( $images[0] as $index => $tag ) { |
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// Default to resize, though fit may be used in certain cases where a dimension cannot be ascertained |
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$transform = 'resize'; |
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// Start with a clean attachment ID each time |
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$attachment_id = false; |
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// Flag if we need to munge a fullsize URL |
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$fullsize_url = false; |
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// Identify image source |
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$src = $src_orig = $images['img_url'][ $index ]; |
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/** |
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* Allow specific images to be skipped by Photon. |
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* |
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* @module photon |
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* |
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* @since 2.0.3 |
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* |
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* @param bool false Should Photon ignore this image. Default to false. |
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* @param string $src Image URL. |
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* @param string $tag Image Tag (Image HTML output). |
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*/ |
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if ( apply_filters( 'jetpack_photon_skip_image', false, $src, $tag ) ) |
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continue; |
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// Support Automattic's Lazy Load plugin |
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// Can't modify $tag yet as we need unadulterated version later |
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if ( preg_match( '#data-lazy-src=["|\'](.+?)["|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) { |
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$placeholder_src = $placeholder_src_orig = $src; |
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$src = $src_orig = $lazy_load_src[1]; |
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} elseif ( preg_match( '#data-lazy-original=["|\'](.+?)["|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) { |
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$placeholder_src = $placeholder_src_orig = $src; |
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$src = $src_orig = $lazy_load_src[1]; |
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} |
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// Check if image URL should be used with Photon |
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if ( self::validate_image_url( $src ) ) { |
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// Find the width and height attributes |
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$width = $height = false; |
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// First, check the image tag |
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if ( preg_match( '#width=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $width_string ) ) |
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$width = $width_string[1]; |
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if ( preg_match( '#height=["|\']?([\d%]+)["|\']?#i', $images['img_tag'][ $index ], $height_string ) ) |
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$height = $height_string[1]; |
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// Can't pass both a relative width and height, so unset the height in favor of not breaking the horizontal layout. |
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if ( false !== strpos( $width, '%' ) && false !== strpos( $height, '%' ) ) |
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$width = $height = false; |
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// Detect WP registered image size from HTML class |
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if ( preg_match( '#class=["|\']?[^"\']*size-([^"\'\s]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $size ) ) { |
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$size = array_pop( $size ); |
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if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) { |
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$width = (int) $image_sizes[ $size ]['width']; |
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$height = (int) $image_sizes[ $size ]['height']; |
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$transform = $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; |
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} |
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} else { |
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unset( $size ); |
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} |
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// WP Attachment ID, if uploaded to this site |
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if ( |
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preg_match( '#class=["|\']?[^"\']*wp-image-([\d]+)[^"\']*["|\']?#i', $images['img_tag'][ $index ], $attachment_id ) && |
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( |
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0 === strpos( $src, $upload_dir['baseurl'] ) || |
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/** |
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* Filter whether an image using an attachment ID in its class has to be uploaded to the local site to go through Photon. |
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* |
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* @module photon |
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* |
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* @since 2.0.3 |
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* |
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* @param bool false Was the image uploaded to the local site. Default to false. |
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* @param array $args { |
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* Array of image details. |
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* |
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* @type $src Image URL. |
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* @type tag Image tag (Image HTML output). |
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* @type $images Array of information about the image. |
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* @type $index Image index. |
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* } |
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*/ |
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apply_filters( 'jetpack_photon_image_is_local', false, compact( 'src', 'tag', 'images', 'index' ) ) |
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) |
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) { |
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$attachment_id = intval( array_pop( $attachment_id ) ); |
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if ( $attachment_id ) { |
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$attachment = get_post( $attachment_id ); |
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// Basic check on returned post object |
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if ( is_object( $attachment ) && ! is_wp_error( $attachment ) && 'attachment' == $attachment->post_type ) { |
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$src_per_wp = wp_get_attachment_image_src( $attachment_id, isset( $size ) ? $size : 'full' ); |
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if ( self::validate_image_url( $src_per_wp[0] ) ) { |
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$src = $src_per_wp[0]; |
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$fullsize_url = true; |
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// Prevent image distortion if a detected dimension exceeds the image's natural dimensions |
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if ( ( false !== $width && $width > $src_per_wp[1] ) || ( false !== $height && $height > $src_per_wp[2] ) ) { |
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$width = false == $width ? false : min( $width, $src_per_wp[1] ); |
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$height = false == $height ? false : min( $height, $src_per_wp[2] ); |
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} |
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// If no width and height are found, max out at source image's natural dimensions |
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// Otherwise, respect registered image sizes' cropping setting |
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if ( false == $width && false == $height ) { |
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$width = $src_per_wp[1]; |
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$height = $src_per_wp[2]; |
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$transform = 'fit'; |
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} elseif ( isset( $size ) && array_key_exists( $size, $image_sizes ) && isset( $image_sizes[ $size ]['crop'] ) ) { |
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$transform = (bool) $image_sizes[ $size ]['crop'] ? 'resize' : 'fit'; |
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} |
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} |
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} else { |
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unset( $attachment_id ); |
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unset( $attachment ); |
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} |
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} |
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} |
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// If image tag lacks width and height arguments, try to determine from strings WP appends to resized image filenames. |
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if ( false === $width && false === $height ) { |
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list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $src ); |
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} |
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// If width is available, constrain to $content_width |
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if ( false !== $width && false === strpos( $width, '%' ) && is_numeric( $content_width ) ) { |
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if ( $width > $content_width && false !== $height && false === strpos( $height, '%' ) ) { |
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$height = round( ( $content_width * $height ) / $width ); |
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$width = $content_width; |
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} elseif ( $width > $content_width ) { |
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$width = $content_width; |
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} |
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} |
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// Set a width if none is found and $content_width is available |
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// If width is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing |
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if ( false === $width && is_numeric( $content_width ) ) { |
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$width = (int) $content_width; |
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if ( false !== $height ) |
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$transform = 'fit'; |
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} |
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// Detect if image source is for a custom-cropped thumbnail and prevent further URL manipulation. |
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296
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if ( ! $fullsize_url && preg_match_all( '#-e[a-z0-9]+(-\d+x\d+)?\.(' . implode('|', self::$extensions ) . '){1}$#i', basename( $src ), $filename ) ) |
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297
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$fullsize_url = true; |
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298
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299
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// Build URL, first maybe removing WP's resized string so we pass the original image to Photon |
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300
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if ( ! $fullsize_url ) { |
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301
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$src = self::strip_image_dimensions_maybe( $src ); |
|
302
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} |
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303
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304
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// Build array of Photon args and expose to filter before passing to Photon URL function |
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305
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$args = array(); |
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306
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307
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if ( false !== $width && false !== $height && false === strpos( $width, '%' ) && false === strpos( $height, '%' ) ) |
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308
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$args[ $transform ] = $width . ',' . $height; |
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309
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elseif ( false !== $width ) |
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310
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$args['w'] = $width; |
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311
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elseif ( false !== $height ) |
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312
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$args['h'] = $height; |
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313
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314
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/** |
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315
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* Filter the array of Photon arguments added to an image when it goes through Photon. |
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316
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* By default, only includes width and height values. |
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317
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* @see https://developer.wordpress.com/docs/photon/api/ |
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318
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* |
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319
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* @module photon |
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320
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* |
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321
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* @since 2.0.0 |
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322
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* |
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323
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* @param array $args Array of Photon Arguments. |
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324
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* @param array $args { |
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325
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* Array of image details. |
|
326
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* |
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327
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* @type $tag Image tag (Image HTML output). |
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328
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* @type $src Image URL. |
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329
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* @type $src_orig Original Image URL. |
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330
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* @type $width Image width. |
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331
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* @type $height Image height. |
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332
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* } |
|
333
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*/ |
|
334
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|
$args = apply_filters( 'jetpack_photon_post_image_args', $args, compact( 'tag', 'src', 'src_orig', 'width', 'height' ) ); |
|
335
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|
336
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|
|
$photon_url = jetpack_photon_url( $src, $args ); |
|
337
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|
338
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|
// Modify image tag if Photon function provides a URL |
|
339
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|
// 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. |
|
340
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|
|
if ( $src != $photon_url ) { |
|
341
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|
$new_tag = $tag; |
|
342
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|
343
|
|
|
// If present, replace the link href with a Photoned URL for the full-size image. |
|
344
|
|
|
if ( ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) |
|
345
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|
|
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $new_tag, 1 ); |
|
346
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|
|
|
|
347
|
|
|
// Supplant the original source value with our Photon URL |
|
348
|
|
|
$photon_url = esc_url( $photon_url ); |
|
349
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|
|
$new_tag = str_replace( $src_orig, $photon_url, $new_tag ); |
|
350
|
|
|
|
|
351
|
|
|
// If Lazy Load is in use, pass placeholder image through Photon |
|
352
|
|
|
if ( isset( $placeholder_src ) && self::validate_image_url( $placeholder_src ) ) { |
|
353
|
|
|
$placeholder_src = jetpack_photon_url( $placeholder_src ); |
|
354
|
|
|
|
|
355
|
|
|
if ( $placeholder_src != $placeholder_src_orig ) |
|
356
|
|
|
$new_tag = str_replace( $placeholder_src_orig, esc_url( $placeholder_src ), $new_tag ); |
|
|
|
|
|
|
357
|
|
|
|
|
358
|
|
|
unset( $placeholder_src ); |
|
359
|
|
|
} |
|
360
|
|
|
|
|
361
|
|
|
// Remove the width and height arguments from the tag to prevent distortion |
|
362
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|
|
$new_tag = preg_replace( '#(?<=\s)(width|height)=["|\']?[\d%]+["|\']?\s?#i', '', $new_tag ); |
|
363
|
|
|
|
|
364
|
|
|
// Tag an image for dimension checking |
|
365
|
|
|
$new_tag = preg_replace( '#(\s?/)?>(\s*</a>)?$#i', ' data-recalc-dims="1"\1>\2', $new_tag ); |
|
366
|
|
|
|
|
367
|
|
|
// Replace original tag with modified version |
|
368
|
|
|
$content = str_replace( $tag, $new_tag, $content ); |
|
369
|
|
|
} |
|
370
|
|
|
} elseif ( preg_match( '#^http(s)?://i[\d]{1}.wp.com#', $src ) && ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) { |
|
371
|
|
|
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $tag, 1 ); |
|
372
|
|
|
|
|
373
|
|
|
$content = str_replace( $tag, $new_tag, $content ); |
|
374
|
|
|
} |
|
375
|
|
|
} |
|
376
|
|
|
} |
|
377
|
|
|
|
|
378
|
|
|
return $content; |
|
379
|
|
|
} |
|
380
|
|
|
|
|
381
|
|
|
public static function filter_the_galleries( $galleries ) { |
|
382
|
|
|
if ( empty( $galleries ) || ! is_array( $galleries ) ) { |
|
383
|
|
|
return $galleries; |
|
384
|
|
|
} |
|
385
|
|
|
|
|
386
|
|
|
// Pass by reference, so we can modify them in place. |
|
387
|
|
|
foreach ( $galleries as &$this_gallery ) { |
|
388
|
|
|
if ( is_string( $this_gallery ) ) { |
|
389
|
|
|
$this_gallery = self::filter_the_content( $this_gallery ); |
|
390
|
|
|
// LEAVING COMMENTED OUT as for the moment it doesn't seem |
|
391
|
|
|
// necessary and I'm not sure how it would propagate through. |
|
392
|
|
|
// } elseif ( is_array( $this_gallery ) |
|
|
|
|
|
|
393
|
|
|
// && ! empty( $this_gallery['src'] ) |
|
|
|
|
|
|
394
|
|
|
// && ! empty( $this_gallery['type'] ) |
|
|
|
|
|
|
395
|
|
|
// && in_array( $this_gallery['type'], array( 'rectangle', 'square', 'circle' ) ) ) { |
|
|
|
|
|
|
396
|
|
|
// $this_gallery['src'] = array_map( 'jetpack_photon_url', $this_gallery['src'] ); |
|
|
|
|
|
|
397
|
|
|
} |
|
398
|
|
|
} |
|
399
|
|
|
unset( $this_gallery ); // break the reference. |
|
400
|
|
|
|
|
401
|
|
|
return $galleries; |
|
402
|
|
|
} |
|
403
|
|
|
|
|
404
|
|
|
/** |
|
405
|
|
|
** CORE IMAGE RETRIEVAL |
|
406
|
|
|
**/ |
|
407
|
|
|
|
|
408
|
|
|
/** |
|
409
|
|
|
* Filter post thumbnail image retrieval, passing images through Photon |
|
410
|
|
|
* |
|
411
|
|
|
* @param string|bool $image |
|
412
|
|
|
* @param int $attachment_id |
|
413
|
|
|
* @param string|array $size |
|
414
|
|
|
* @uses is_admin, apply_filters, wp_get_attachment_url, self::validate_image_url, this::image_sizes, jetpack_photon_url |
|
415
|
|
|
* @filter image_downsize |
|
416
|
|
|
* @return string|bool |
|
417
|
|
|
*/ |
|
418
|
|
|
public function filter_image_downsize( $image, $attachment_id, $size ) { |
|
419
|
|
|
// Don't foul up the admin side of things, and provide plugins a way of preventing Photon from being applied to images. |
|
420
|
|
|
if ( |
|
421
|
|
|
is_admin() || |
|
422
|
|
|
/** |
|
423
|
|
|
* Provide plugins a way of preventing Photon from being applied to images retrieved from WordPress Core. |
|
424
|
|
|
* |
|
425
|
|
|
* @module photon |
|
426
|
|
|
* |
|
427
|
|
|
* @since 2.0.0 |
|
428
|
|
|
* |
|
429
|
|
|
* @param bool false Stop Photon from being applied to the image. Default to false. |
|
430
|
|
|
* @param array $args { |
|
431
|
|
|
* Array of image details. |
|
432
|
|
|
* |
|
433
|
|
|
* @type $image Image URL. |
|
434
|
|
|
* @type $attachment_id Attachment ID of the image. |
|
435
|
|
|
* @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer. |
|
436
|
|
|
* } |
|
437
|
|
|
*/ |
|
438
|
|
|
apply_filters( 'jetpack_photon_override_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) |
|
439
|
|
|
) |
|
440
|
|
|
return $image; |
|
441
|
|
|
|
|
442
|
|
|
// Get the image URL and proceed with Photon-ification if successful |
|
443
|
|
|
$image_url = wp_get_attachment_url( $attachment_id ); |
|
444
|
|
|
|
|
445
|
|
|
if ( $image_url ) { |
|
446
|
|
|
// Check if image URL should be used with Photon |
|
447
|
|
|
if ( ! self::validate_image_url( $image_url ) ) |
|
448
|
|
|
return $image; |
|
449
|
|
|
|
|
450
|
|
|
// If an image is requested with a size known to WordPress, use that size's settings with Photon |
|
451
|
|
|
if ( ( is_string( $size ) || is_int( $size ) ) && array_key_exists( $size, self::image_sizes() ) ) { |
|
452
|
|
|
$image_args = self::image_sizes(); |
|
453
|
|
|
$image_args = $image_args[ $size ]; |
|
454
|
|
|
|
|
455
|
|
|
$photon_args = array(); |
|
456
|
|
|
|
|
457
|
|
|
// `full` is a special case in WP |
|
458
|
|
|
// To ensure filter receives consistent data regardless of requested size, `$image_args` is overridden with dimensions of original image. |
|
459
|
|
|
if ( 'full' == $size || ! $image_meta = image_get_intermediate_size( $attachment_id, $size ) ) { |
|
460
|
|
|
$image_meta = wp_get_attachment_metadata( $attachment_id ); |
|
461
|
|
|
} |
|
462
|
|
|
|
|
463
|
|
|
if ( isset( $image_meta['width'], $image_meta['height'] ) ) { |
|
464
|
|
|
// 'crop' is true so Photon's `resize` method is used |
|
465
|
|
|
$image_args = array( |
|
466
|
|
|
'width' => $image_meta['width'], |
|
467
|
|
|
'height' => $image_meta['height'], |
|
468
|
|
|
'crop' => true |
|
469
|
|
|
); |
|
470
|
|
|
} |
|
471
|
|
|
|
|
472
|
|
|
// Expose determined arguments to a filter before passing to Photon |
|
473
|
|
|
$transform = $image_args['crop'] ? 'resize' : 'fit'; |
|
474
|
|
|
|
|
475
|
|
|
// Check specified image dimensions and account for possible zero values; photon fails to resize if a dimension is zero. |
|
476
|
|
|
if ( 0 == $image_args['width'] || 0 == $image_args['height'] ) { |
|
477
|
|
|
if ( 0 == $image_args['width'] && 0 < $image_args['height'] ) { |
|
478
|
|
|
$photon_args['h'] = $image_args['height']; |
|
479
|
|
|
} elseif ( 0 == $image_args['height'] && 0 < $image_args['width'] ) { |
|
480
|
|
|
$photon_args['w'] = $image_args['width']; |
|
481
|
|
|
} |
|
482
|
|
|
} else { |
|
483
|
|
|
if ( ( 'resize' === $transform ) && $image_meta = wp_get_attachment_metadata( $attachment_id ) ) { |
|
484
|
|
|
// Lets make sure that we don't upscale images since wp never upscales them as well |
|
485
|
|
|
$smaller_width = ( ( $image_meta['width'] < $image_args['width'] ) ? $image_meta['width'] : $image_args['width'] ); |
|
486
|
|
|
$smaller_height = ( ( $image_meta['height'] < $image_args['height'] ) ? $image_meta['height'] : $image_args['height'] ); |
|
487
|
|
|
|
|
488
|
|
|
$photon_args[ $transform ] = $smaller_width . ',' . $smaller_height; |
|
489
|
|
|
} else { |
|
490
|
|
|
$photon_args[ $transform ] = $image_args['width'] . ',' . $image_args['height']; |
|
491
|
|
|
} |
|
492
|
|
|
|
|
493
|
|
|
} |
|
494
|
|
|
|
|
495
|
|
|
/** |
|
496
|
|
|
* Filter the Photon Arguments added to an image when going through Photon, when that image size is a string. |
|
497
|
|
|
* Image size will be a string (e.g. "full", "medium") when it is known to WordPress. |
|
498
|
|
|
* |
|
499
|
|
|
* @module photon |
|
500
|
|
|
* |
|
501
|
|
|
* @since 2.0.0 |
|
502
|
|
|
* |
|
503
|
|
|
* @param array $photon_args Array of Photon arguments. |
|
504
|
|
|
* @param array $args { |
|
505
|
|
|
* Array of image details. |
|
506
|
|
|
* |
|
507
|
|
|
* @type $image_args Array of Image arguments (width, height, crop). |
|
508
|
|
|
* @type $image_url Image URL. |
|
509
|
|
|
* @type $attachment_id Attachment ID of the image. |
|
510
|
|
|
* @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer. |
|
511
|
|
|
* @type $transform Value can be resize or fit. |
|
512
|
|
|
* @see https://developer.wordpress.com/docs/photon/api |
|
513
|
|
|
* } |
|
514
|
|
|
*/ |
|
515
|
|
|
$photon_args = apply_filters( 'jetpack_photon_image_downsize_string', $photon_args, compact( 'image_args', 'image_url', 'attachment_id', 'size', 'transform' ) ); |
|
516
|
|
|
|
|
517
|
|
|
// Generate Photon URL |
|
518
|
|
|
$image = array( |
|
519
|
|
|
jetpack_photon_url( $image_url, $photon_args ), |
|
520
|
|
|
$image_args['width'], |
|
521
|
|
|
$image_args['height'] |
|
522
|
|
|
); |
|
523
|
|
|
} elseif ( is_array( $size ) ) { |
|
524
|
|
|
// Pull width and height values from the provided array, if possible |
|
525
|
|
|
$width = isset( $size[0] ) ? (int) $size[0] : false; |
|
526
|
|
|
$height = isset( $size[1] ) ? (int) $size[1] : false; |
|
527
|
|
|
|
|
528
|
|
|
// Don't bother if necessary parameters aren't passed. |
|
529
|
|
|
if ( ! $width || ! $height ) |
|
|
|
|
|
|
530
|
|
|
return $image; |
|
531
|
|
|
|
|
532
|
|
|
// Expose arguments to a filter before passing to Photon |
|
533
|
|
|
$photon_args = array( |
|
534
|
|
|
'fit' => $width . ',' . $height |
|
535
|
|
|
); |
|
536
|
|
|
|
|
537
|
|
|
/** |
|
538
|
|
|
* Filter the Photon Arguments added to an image when going through Photon, |
|
539
|
|
|
* when the image size is an array of height and width values. |
|
540
|
|
|
* |
|
541
|
|
|
* @module photon |
|
542
|
|
|
* |
|
543
|
|
|
* @since 2.0.0 |
|
544
|
|
|
* |
|
545
|
|
|
* @param array $photon_args Array of Photon arguments. |
|
546
|
|
|
* @param array $args { |
|
547
|
|
|
* Array of image details. |
|
548
|
|
|
* |
|
549
|
|
|
* @type $width Image width. |
|
550
|
|
|
* @type height Image height. |
|
551
|
|
|
* @type $image_url Image URL. |
|
552
|
|
|
* @type $attachment_id Attachment ID of the image. |
|
553
|
|
|
* } |
|
554
|
|
|
*/ |
|
555
|
|
|
$photon_args = apply_filters( 'jetpack_photon_image_downsize_array', $photon_args, compact( 'width', 'height', 'image_url', 'attachment_id' ) ); |
|
556
|
|
|
|
|
557
|
|
|
// Generate Photon URL |
|
558
|
|
|
$image = array( |
|
559
|
|
|
jetpack_photon_url( $image_url, $photon_args ), |
|
560
|
|
|
$width, |
|
561
|
|
|
$height |
|
562
|
|
|
); |
|
563
|
|
|
} |
|
564
|
|
|
} |
|
565
|
|
|
|
|
566
|
|
|
return $image; |
|
567
|
|
|
} |
|
568
|
|
|
|
|
569
|
|
|
/** |
|
570
|
|
|
* Filters an array of image `srcset` values, replacing each URL with its Photon equivalent. |
|
571
|
|
|
* |
|
572
|
|
|
* @since 3.8.0 |
|
573
|
|
|
* @param array $sources An array of image urls and widths. |
|
574
|
|
|
* @uses self::validate_image_url, jetpack_photon_url |
|
575
|
|
|
* @return array An array of Photon image urls and widths. |
|
576
|
|
|
*/ |
|
577
|
|
|
public function filter_srcset_array( $sources, $size_array, $image_src, $image_meta ) { |
|
578
|
|
|
$upload_dir = wp_upload_dir(); |
|
579
|
|
|
|
|
580
|
|
|
foreach ( $sources as $i => $source ) { |
|
581
|
|
|
if ( ! self::validate_image_url( $source['url'] ) ) { |
|
582
|
|
|
continue; |
|
583
|
|
|
} |
|
584
|
|
|
|
|
585
|
|
|
$url = $source['url']; |
|
586
|
|
|
list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $url ); |
|
587
|
|
|
|
|
588
|
|
|
// It's quicker to get the full size with the data we have already, if available |
|
589
|
|
|
if ( isset( $image_meta['file'] ) ) { |
|
590
|
|
|
$url = trailingslashit( $upload_dir['baseurl'] ) . $image_meta['file']; |
|
591
|
|
|
} else { |
|
592
|
|
|
$url = Jetpack_Photon::strip_image_dimensions_maybe( $url ); |
|
593
|
|
|
} |
|
594
|
|
|
|
|
595
|
|
|
$args = array(); |
|
596
|
|
|
if ( 'w' === $source['descriptor'] ) { |
|
597
|
|
|
if ( $height && ( $source['value'] == $width ) ) { |
|
598
|
|
|
$args['resize'] = $width . ',' . $height; |
|
599
|
|
|
} else { |
|
600
|
|
|
$args['w'] = $source['value']; |
|
601
|
|
|
} |
|
602
|
|
|
|
|
603
|
|
|
} |
|
604
|
|
|
|
|
605
|
|
|
$sources[ $i ]['url'] = jetpack_photon_url( $url, $args ); |
|
606
|
|
|
} |
|
607
|
|
|
|
|
608
|
|
|
return $sources; |
|
609
|
|
|
} |
|
610
|
|
|
|
|
611
|
|
|
/** |
|
612
|
|
|
** GENERAL FUNCTIONS |
|
613
|
|
|
**/ |
|
614
|
|
|
|
|
615
|
|
|
/** |
|
616
|
|
|
* Ensure image URL is valid for Photon. |
|
617
|
|
|
* 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. |
|
618
|
|
|
* |
|
619
|
|
|
* @param string $url |
|
620
|
|
|
* @uses wp_parse_args |
|
621
|
|
|
* @return bool |
|
622
|
|
|
*/ |
|
623
|
|
|
protected static function validate_image_url( $url ) { |
|
624
|
|
|
$parsed_url = @parse_url( $url ); |
|
625
|
|
|
|
|
626
|
|
|
if ( ! $parsed_url ) |
|
627
|
|
|
return false; |
|
628
|
|
|
|
|
629
|
|
|
// Parse URL and ensure needed keys exist, since the array returned by `parse_url` only includes the URL components it finds. |
|
630
|
|
|
$url_info = wp_parse_args( $parsed_url, array( |
|
631
|
|
|
'scheme' => null, |
|
632
|
|
|
'host' => null, |
|
633
|
|
|
'port' => null, |
|
634
|
|
|
'path' => null |
|
635
|
|
|
) ); |
|
636
|
|
|
|
|
637
|
|
|
// Bail if scheme isn't http or port is set that isn't port 80 |
|
638
|
|
|
if ( |
|
639
|
|
|
( 'http' != $url_info['scheme'] || ! in_array( $url_info['port'], array( 80, null ) ) ) && |
|
640
|
|
|
/** |
|
641
|
|
|
* Allow Photon to fetch images that are served via HTTPS. |
|
642
|
|
|
* |
|
643
|
|
|
* @module photon |
|
644
|
|
|
* |
|
645
|
|
|
* @since 2.4.0 |
|
646
|
|
|
* |
|
647
|
|
|
* @param bool true Should Photon ignore images using the HTTPS scheme. Default to true. |
|
648
|
|
|
*/ |
|
649
|
|
|
apply_filters( 'jetpack_photon_reject_https', true ) |
|
650
|
|
|
) { |
|
651
|
|
|
return false; |
|
652
|
|
|
} |
|
653
|
|
|
|
|
654
|
|
|
// Bail if no host is found |
|
655
|
|
|
if ( is_null( $url_info['host'] ) ) |
|
656
|
|
|
return false; |
|
657
|
|
|
|
|
658
|
|
|
// Bail if the image alredy went through Photon |
|
659
|
|
|
if ( preg_match( '#^i[\d]{1}.wp.com$#i', $url_info['host'] ) ) |
|
660
|
|
|
return false; |
|
661
|
|
|
|
|
662
|
|
|
// Bail if no path is found |
|
663
|
|
|
if ( is_null( $url_info['path'] ) ) |
|
664
|
|
|
return false; |
|
665
|
|
|
|
|
666
|
|
|
// Ensure image extension is acceptable |
|
667
|
|
|
if ( ! in_array( strtolower( pathinfo( $url_info['path'], PATHINFO_EXTENSION ) ), self::$extensions ) ) |
|
668
|
|
|
return false; |
|
669
|
|
|
|
|
670
|
|
|
// If we got this far, we should have an acceptable image URL |
|
671
|
|
|
// But let folks filter to decline if they prefer. |
|
672
|
|
|
/** |
|
673
|
|
|
* Overwrite the results of the validation steps an image goes through before to be considered valid to be used by Photon. |
|
674
|
|
|
* |
|
675
|
|
|
* @module photon |
|
676
|
|
|
* |
|
677
|
|
|
* @since 3.0.0 |
|
678
|
|
|
* |
|
679
|
|
|
* @param bool true Is the image URL valid and can it be used by Photon. Default to true. |
|
680
|
|
|
* @param string $url Image URL. |
|
681
|
|
|
* @param array $parsed_url Array of information about the image. |
|
682
|
|
|
*/ |
|
683
|
|
|
return apply_filters( 'photon_validate_image_url', true, $url, $parsed_url ); |
|
684
|
|
|
} |
|
685
|
|
|
|
|
686
|
|
|
/** |
|
687
|
|
|
* Checks if the file exists before it passes the file to photon |
|
688
|
|
|
* |
|
689
|
|
|
* @param string $src The image URL |
|
690
|
|
|
* @return string |
|
691
|
|
|
**/ |
|
692
|
|
|
protected static function strip_image_dimensions_maybe( $src ){ |
|
693
|
|
|
$stripped_src = $src; |
|
|
|
|
|
|
694
|
|
|
|
|
695
|
|
|
// Build URL, first removing WP's resized string so we pass the original image to Photon |
|
696
|
|
|
if ( preg_match( '#(-\d+x\d+)\.(' . implode('|', self::$extensions ) . '){1}$#i', $src, $src_parts ) ) { |
|
697
|
|
|
$stripped_src = str_replace( $src_parts[1], '', $src ); |
|
698
|
|
|
$upload_dir = wp_upload_dir(); |
|
699
|
|
|
|
|
700
|
|
|
// Extracts the file path to the image minus the base url |
|
701
|
|
|
$file_path = substr( $stripped_src, strlen ( $upload_dir['baseurl'] ) ); |
|
702
|
|
|
|
|
703
|
|
|
if( file_exists( $upload_dir["basedir"] . $file_path ) ) |
|
704
|
|
|
$src = $stripped_src; |
|
705
|
|
|
} |
|
706
|
|
|
|
|
707
|
|
|
return $src; |
|
708
|
|
|
} |
|
709
|
|
|
|
|
710
|
|
|
/** |
|
711
|
|
|
* Provide an array of available image sizes and corresponding dimensions. |
|
712
|
|
|
* Similar to get_intermediate_image_sizes() except that it includes image sizes' dimensions, not just their names. |
|
713
|
|
|
* |
|
714
|
|
|
* @global $wp_additional_image_sizes |
|
715
|
|
|
* @uses get_option |
|
716
|
|
|
* @return array |
|
717
|
|
|
*/ |
|
718
|
|
|
protected static function image_sizes() { |
|
719
|
|
|
if ( null == self::$image_sizes ) { |
|
720
|
|
|
global $_wp_additional_image_sizes; |
|
721
|
|
|
|
|
722
|
|
|
// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes |
|
723
|
|
|
$images = array( |
|
724
|
|
|
'thumb' => array( |
|
725
|
|
|
'width' => intval( get_option( 'thumbnail_size_w' ) ), |
|
726
|
|
|
'height' => intval( get_option( 'thumbnail_size_h' ) ), |
|
727
|
|
|
'crop' => (bool) get_option( 'thumbnail_crop' ) |
|
728
|
|
|
), |
|
729
|
|
|
'medium' => array( |
|
730
|
|
|
'width' => intval( get_option( 'medium_size_w' ) ), |
|
731
|
|
|
'height' => intval( get_option( 'medium_size_h' ) ), |
|
732
|
|
|
'crop' => false |
|
733
|
|
|
), |
|
734
|
|
|
'large' => array( |
|
735
|
|
|
'width' => intval( get_option( 'large_size_w' ) ), |
|
736
|
|
|
'height' => intval( get_option( 'large_size_h' ) ), |
|
737
|
|
|
'crop' => false |
|
738
|
|
|
), |
|
739
|
|
|
'full' => array( |
|
740
|
|
|
'width' => null, |
|
741
|
|
|
'height' => null, |
|
742
|
|
|
'crop' => false |
|
743
|
|
|
) |
|
744
|
|
|
); |
|
745
|
|
|
|
|
746
|
|
|
// Compatibility mapping as found in wp-includes/media.php |
|
747
|
|
|
$images['thumbnail'] = $images['thumb']; |
|
748
|
|
|
|
|
749
|
|
|
// Update class variable, merging in $_wp_additional_image_sizes if any are set |
|
750
|
|
|
if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) |
|
751
|
|
|
self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes ); |
|
752
|
|
|
else |
|
753
|
|
|
self::$image_sizes = $images; |
|
754
|
|
|
} |
|
755
|
|
|
|
|
756
|
|
|
return is_array( self::$image_sizes ) ? self::$image_sizes : array(); |
|
757
|
|
|
} |
|
758
|
|
|
|
|
759
|
|
|
/** |
|
760
|
|
|
* Pass og:image URLs through Photon |
|
761
|
|
|
* |
|
762
|
|
|
* @param array $tags |
|
763
|
|
|
* @param array $parameters |
|
764
|
|
|
* @uses jetpack_photon_url |
|
765
|
|
|
* @return array |
|
766
|
|
|
*/ |
|
767
|
|
|
function filter_open_graph_tags( $tags, $parameters ) { |
|
768
|
|
|
if ( empty( $tags['og:image'] ) ) { |
|
769
|
|
|
return $tags; |
|
770
|
|
|
} |
|
771
|
|
|
|
|
772
|
|
|
$photon_args = array( |
|
773
|
|
|
'fit' => sprintf( '%d,%d', 2 * $parameters['image_width'], 2 * $parameters['image_height'] ), |
|
774
|
|
|
); |
|
775
|
|
|
|
|
776
|
|
|
if ( is_array( $tags['og:image'] ) ) { |
|
777
|
|
|
$images = array(); |
|
778
|
|
|
foreach ( $tags['og:image'] as $image ) { |
|
779
|
|
|
$images[] = jetpack_photon_url( $image, $photon_args ); |
|
780
|
|
|
} |
|
781
|
|
|
$tags['og:image'] = $images; |
|
782
|
|
|
} else { |
|
783
|
|
|
$tags['og:image'] = jetpack_photon_url( $tags['og:image'], $photon_args ); |
|
784
|
|
|
} |
|
785
|
|
|
|
|
786
|
|
|
return $tags; |
|
787
|
|
|
} |
|
788
|
|
|
|
|
789
|
|
|
/** |
|
790
|
|
|
* Enqueue Photon helper script |
|
791
|
|
|
* |
|
792
|
|
|
* @uses wp_enqueue_script, plugins_url |
|
793
|
|
|
* @action wp_enqueue_script |
|
794
|
|
|
* @return null |
|
795
|
|
|
*/ |
|
796
|
|
|
public function action_wp_enqueue_scripts() { |
|
797
|
|
|
wp_enqueue_script( 'jetpack-photon', plugins_url( 'modules/photon/photon.js', JETPACK__PLUGIN_FILE ), array( 'jquery' ), 20130122, true ); |
|
798
|
|
|
} |
|
799
|
|
|
} |
|
800
|
|
|
|
Automattic /
jetpack
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