| 1 |
<?php |
| 2 |
|
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class Jetpack_Photon { |
| 4 |
/** |
| 5 |
* Class variables |
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*/ |
| 7 |
// Oh look, a singleton |
| 8 |
private static $__instance = null; |
| 9 |
|
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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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|
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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 $image_sizes = null; |
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|
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/** |
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* Singleton implementation |
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* |
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* @return object |
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*/ |
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public static function instance() { |
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if ( ! is_a( self::$__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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|
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return self::$__instance; |
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} |
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|
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/** |
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* Silence is golden. |
| 37 |
*/ |
| 38 |
private function __construct() {} |
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|
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/** |
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* Register actions and filters, but only if basic Photon functions are available. |
| 42 |
* The basic functions are found in ./functions.photon.php. |
| 43 |
* |
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* @uses add_action, add_filter |
| 45 |
* @return null |
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*/ |
| 47 |
private function setup() { |
| 48 |
if ( ! function_exists( 'jetpack_photon_url' ) ) |
| 49 |
return; |
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|
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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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add_filter( 'widget_media_image_instance', array( __CLASS__, 'filter_the_image_widget' ), 999999 ); |
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|
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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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|
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// Responsive image srcset substitution |
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add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_array' ), 10, 5 ); |
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add_filter( 'wp_calculate_image_sizes', array( $this, 'filter_sizes' ), 1, 2 ); // Early so themes can still easily filter. |
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|
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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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/** |
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** IN-CONTENT IMAGE MANIPULATION FUNCTIONS |
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**/ |
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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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|
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if ( preg_match_all( '#(?:<a[^>]+?href=["|\'](?P<link_url>[^\s]+?)["|\'][^>]*?>\s*)?(?P<img_tag><img[^>]*?\s+?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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|
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return $images; |
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} |
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|
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return array(); |
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} |
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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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|
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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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|
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if ( $width && $height ) |
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return array( $width, $height ); |
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} |
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|
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return array( false, false ); |
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} |
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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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|
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if ( ! empty( $images ) ) { |
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$content_width = Jetpack::get_content_width(); |
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|
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$image_sizes = self::image_sizes(); |
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$upload_dir = wp_get_upload_dir(); |
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|
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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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|
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// Start with a clean attachment ID each time |
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$attachment_id = false; |
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|
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// Flag if we need to munge a fullsize URL |
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$fullsize_url = false; |
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|
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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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/** |
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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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 $index Image index. |
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* } |
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*/ |
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apply_filters( 'jetpack_photon_image_is_local', false, compact( 'src', 'tag', 'images', 'index' ) ) |
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) { |
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$attachment_id = intval( array_pop( $attachment_id ) ); |
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|
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if ( $attachment_id ) { |
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$attachment = get_post( $attachment_id ); |
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|
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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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|
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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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|
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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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|
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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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|
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// If image tag lacks width and height arguments, try to determine from strings WP appends to resized image filenames. |
| 258 |
if ( false === $width && false === $height ) { |
| 259 |
list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $src ); |
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} |
| 261 |
|
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// If width is available, constrain to $content_width |
| 263 |
if ( false !== $width && false === strpos( $width, '%' ) && is_numeric( $content_width ) ) { |
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if ( $width > $content_width && false !== $height && false === strpos( $height, '%' ) ) { |
| 265 |
$height = round( ( $content_width * $height ) / $width ); |
| 266 |
$width = $content_width; |
| 267 |
} elseif ( $width > $content_width ) { |
| 268 |
$width = $content_width; |
| 269 |
} |
| 270 |
} |
| 271 |
|
| 272 |
// Set a width if none is found and $content_width is available |
| 273 |
// If width is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing |
| 274 |
if ( false === $width && is_numeric( $content_width ) ) { |
| 275 |
$width = (int) $content_width; |
| 276 |
|
| 277 |
if ( false !== $height ) |
| 278 |
$transform = 'fit'; |
| 279 |
} |
| 280 |
|
| 281 |
// Detect if image source is for a custom-cropped thumbnail and prevent further URL manipulation. |
| 282 |
if ( ! $fullsize_url && preg_match_all( '#-e[a-z0-9]+(-\d+x\d+)?\.(' . implode('|', self::$extensions ) . '){1}$#i', basename( $src ), $filename ) ) |
| 283 |
$fullsize_url = true; |
| 284 |
|
| 285 |
// Build URL, first maybe removing WP's resized string so we pass the original image to Photon |
| 286 |
if ( ! $fullsize_url ) { |
| 287 |
$src = self::strip_image_dimensions_maybe( $src ); |
| 288 |
} |
| 289 |
|
| 290 |
// Build array of Photon args and expose to filter before passing to Photon URL function |
| 291 |
$args = array(); |
| 292 |
|
| 293 |
if ( false !== $width && false !== $height && false === strpos( $width, '%' ) && false === strpos( $height, '%' ) ) |
| 294 |
$args[ $transform ] = $width . ',' . $height; |
| 295 |
elseif ( false !== $width ) |
| 296 |
$args['w'] = $width; |
| 297 |
elseif ( false !== $height ) |
| 298 |
$args['h'] = $height; |
| 299 |
|
| 300 |
/** |
| 301 |
* Filter the array of Photon arguments added to an image when it goes through Photon. |
| 302 |
* By default, only includes width and height values. |
| 303 |
* @see https://developer.wordpress.com/docs/photon/api/ |
| 304 |
* |
| 305 |
* @module photon |
| 306 |
* |
| 307 |
* @since 2.0.0 |
| 308 |
* |
| 309 |
* @param array $args Array of Photon Arguments. |
| 310 |
* @param array $args { |
| 311 |
* Array of image details. |
| 312 |
* |
| 313 |
* @type $tag Image tag (Image HTML output). |
| 314 |
* @type $src Image URL. |
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* @type $src_orig Original Image URL. |
| 316 |
* @type $width Image width. |
| 317 |
* @type $height Image height. |
| 318 |
* } |
| 319 |
*/ |
| 320 |
$args = apply_filters( 'jetpack_photon_post_image_args', $args, compact( 'tag', 'src', 'src_orig', 'width', 'height' ) ); |
| 321 |
|
| 322 |
$photon_url = jetpack_photon_url( $src, $args ); |
| 323 |
|
| 324 |
// Modify image tag if Photon function provides a URL |
| 325 |
// 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. |
| 326 |
if ( $src != $photon_url ) { |
| 327 |
$new_tag = $tag; |
| 328 |
|
| 329 |
// If present, replace the link href with a Photoned URL for the full-size image. |
| 330 |
if ( ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) |
| 331 |
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $new_tag, 1 ); |
| 332 |
|
| 333 |
// Supplant the original source value with our Photon URL |
| 334 |
$photon_url = esc_url( $photon_url ); |
| 335 |
$new_tag = str_replace( $src_orig, $photon_url, $new_tag ); |
| 336 |
|
| 337 |
// If Lazy Load is in use, pass placeholder image through Photon |
| 338 |
if ( isset( $placeholder_src ) && self::validate_image_url( $placeholder_src ) ) { |
| 339 |
$placeholder_src = jetpack_photon_url( $placeholder_src ); |
| 340 |
|
| 341 |
if ( $placeholder_src != $placeholder_src_orig ) |
| 342 |
$new_tag = str_replace( $placeholder_src_orig, esc_url( $placeholder_src ), $new_tag ); |
| 343 |
|
| 344 |
unset( $placeholder_src ); |
| 345 |
} |
| 346 |
|
| 347 |
// Remove the width and height arguments from the tag to prevent distortion |
| 348 |
$new_tag = preg_replace( '#(?<=\s)(width|height)=["|\']?[\d%]+["|\']?\s?#i', '', $new_tag ); |
| 349 |
|
| 350 |
// Tag an image for dimension checking |
| 351 |
$new_tag = preg_replace( '#(\s?/)?>(\s*</a>)?$#i', ' data-recalc-dims="1"\1>\2', $new_tag ); |
| 352 |
|
| 353 |
// Replace original tag with modified version |
| 354 |
$content = str_replace( $tag, $new_tag, $content ); |
| 355 |
} |
| 356 |
} elseif ( preg_match( '#^http(s)?://i[\d]{1}.wp.com#', $src ) && ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) { |
| 357 |
$new_tag = preg_replace( '#(href=["|\'])' . $images['link_url'][ $index ] . '(["|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $tag, 1 ); |
| 358 |
|
| 359 |
$content = str_replace( $tag, $new_tag, $content ); |
| 360 |
} |
| 361 |
} |
| 362 |
} |
| 363 |
|
| 364 |
return $content; |
| 365 |
} |
| 366 |
|
| 367 |
public static function filter_the_galleries( $galleries ) { |
| 368 |
if ( empty( $galleries ) || ! is_array( $galleries ) ) { |
| 369 |
return $galleries; |
| 370 |
} |
| 371 |
|
| 372 |
// Pass by reference, so we can modify them in place. |
| 373 |
foreach ( $galleries as &$this_gallery ) { |
| 374 |
if ( is_string( $this_gallery ) ) { |
| 375 |
$this_gallery = self::filter_the_content( $this_gallery ); |
| 376 |
// LEAVING COMMENTED OUT as for the moment it doesn't seem |
| 377 |
// necessary and I'm not sure how it would propagate through. |
| 378 |
// } elseif ( is_array( $this_gallery ) |
| 379 |
// && ! empty( $this_gallery['src'] ) |
| 380 |
// && ! empty( $this_gallery['type'] ) |
| 381 |
// && in_array( $this_gallery['type'], array( 'rectangle', 'square', 'circle' ) ) ) { |
| 382 |
// $this_gallery['src'] = array_map( 'jetpack_photon_url', $this_gallery['src'] ); |
| 383 |
} |
| 384 |
} |
| 385 |
unset( $this_gallery ); // break the reference. |
| 386 |
|
| 387 |
return $galleries; |
| 388 |
} |
| 389 |
|
| 390 |
|
| 391 |
/** |
| 392 |
* Runs the image widget through photon. |
| 393 |
* |
| 394 |
* @param array $instance Image widget instance data. |
| 395 |
* @return array |
| 396 |
*/ |
| 397 |
public static function filter_the_image_widget( $instance ) { |
| 398 |
if ( Jetpack::is_module_active( 'photon' ) && ! $instance['attachment_id'] && $instance['url'] ) { |
| 399 |
jetpack_photon_url( $instance['url'], array( |
| 400 |
'w' => $instance['width'], |
| 401 |
'h' => $instance['height'], |
| 402 |
) ); |
| 403 |
} |
| 404 |
|
| 405 |
return $instance; |
| 406 |
} |
| 407 |
|
| 408 |
/** |
| 409 |
** CORE IMAGE RETRIEVAL |
| 410 |
**/ |
| 411 |
|
| 412 |
/** |
| 413 |
* Filter post thumbnail image retrieval, passing images through Photon |
| 414 |
* |
| 415 |
* @param string|bool $image |
| 416 |
* @param int $attachment_id |
| 417 |
* @param string|array $size |
| 418 |
* @uses is_admin, apply_filters, wp_get_attachment_url, self::validate_image_url, this::image_sizes, jetpack_photon_url |
| 419 |
* @filter image_downsize |
| 420 |
* @return string|bool |
| 421 |
*/ |
| 422 |
public function filter_image_downsize( $image, $attachment_id, $size ) { |
| 423 |
// Don't foul up the admin side of things, unless a plugin wants to. |
| 424 |
if ( is_admin() && |
| 425 |
/** |
| 426 |
* Provide plugins a way of running Photon for images in the WordPress Dashboard (wp-admin). |
| 427 |
* |
| 428 |
* 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. |
| 429 |
* |
| 430 |
* @module photon |
| 431 |
* |
| 432 |
* @since 4.8.0 |
| 433 |
* |
| 434 |
* @param bool false Stop Photon from being run on the Dashboard. Default to false. |
| 435 |
* @param array $args { |
| 436 |
* Array of image details. |
| 437 |
* |
| 438 |
* @type $image Image URL. |
| 439 |
* @type $attachment_id Attachment ID of the image. |
| 440 |
* @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer. |
| 441 |
* } |
| 442 |
*/ |
| 443 |
false === apply_filters( 'jetpack_photon_admin_allow_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) |
| 444 |
) { |
| 445 |
return $image; |
| 446 |
} |
| 447 |
|
| 448 |
/** |
| 449 |
* Provide plugins a way of preventing Photon from being applied to images retrieved from WordPress Core. |
| 450 |
* |
| 451 |
* @module photon |
| 452 |
* |
| 453 |
* @since 2.0.0 |
| 454 |
* |
| 455 |
* @param bool false Stop Photon from being applied to the image. Default to false. |
| 456 |
* @param array $args { |
| 457 |
* Array of image details. |
| 458 |
* |
| 459 |
* @type $image Image URL. |
| 460 |
* @type $attachment_id Attachment ID of the image. |
| 461 |
* @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer. |
| 462 |
* } |
| 463 |
*/ |
| 464 |
if ( apply_filters( 'jetpack_photon_override_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) ) { |
| 465 |
return $image; |
| 466 |
} |
| 467 |
|
| 468 |
// Get the image URL and proceed with Photon-ification if successful |
| 469 |
$image_url = wp_get_attachment_url( $attachment_id ); |
| 470 |
|
| 471 |
// Set this to true later when we know we have size meta. |
| 472 |
$has_size_meta = false; |
| 473 |
|
| 474 |
if ( $image_url ) { |
| 475 |
// Check if image URL should be used with Photon |
| 476 |
if ( ! self::validate_image_url( $image_url ) ) |
| 477 |
return $image; |
| 478 |
|
| 479 |
$intermediate = true; // For the fourth array item returned by the image_downsize filter. |
| 480 |
|
| 481 |
// If an image is requested with a size known to WordPress, use that size's settings with Photon |
| 482 |
if ( ( is_string( $size ) || is_int( $size ) ) && array_key_exists( $size, self::image_sizes() ) ) { |
| 483 |
$image_args = self::image_sizes(); |
| 484 |
$image_args = $image_args[ $size ]; |
| 485 |
|
| 486 |
$photon_args = array(); |
| 487 |
|
| 488 |
$image_meta = image_get_intermediate_size( $attachment_id, $size ); |
| 489 |
|
| 490 |
// 'full' is a special case: We need consistent data regardless of the requested size. |
| 491 |
if ( 'full' == $size ) { |
| 492 |
$image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 493 |
$intermediate = false; |
| 494 |
} elseif ( ! $image_meta ) { |
| 495 |
// If we still don't have any image meta at this point, it's probably from a custom thumbnail size |
| 496 |
// for an image that was uploaded before the custom image was added to the theme. Try to determine the size manually. |
| 497 |
$image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 498 |
|
| 499 |
if ( isset( $image_meta['width'], $image_meta['height'] ) ) { |
| 500 |
$image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $image_args['width'], $image_args['height'], $image_args['crop'] ); |
| 501 |
if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image. |
| 502 |
$image_meta['width'] = $image_resized[6]; |
| 503 |
$image_meta['height'] = $image_resized[7]; |
| 504 |
} |
| 505 |
} |
| 506 |
} |
| 507 |
|
| 508 |
if ( isset( $image_meta['width'], $image_meta['height'] ) ) { |
| 509 |
$image_args['width'] = $image_meta['width']; |
| 510 |
$image_args['height'] = $image_meta['height']; |
| 511 |
|
| 512 |
list( $image_args['width'], $image_args['height'] ) = image_constrain_size_for_editor( $image_args['width'], $image_args['height'], $size, 'display' ); |
| 513 |
$has_size_meta = true; |
| 514 |
} |
| 515 |
|
| 516 |
// Expose determined arguments to a filter before passing to Photon |
| 517 |
$transform = $image_args['crop'] ? 'resize' : 'fit'; |
| 518 |
|
| 519 |
// Check specified image dimensions and account for possible zero values; photon fails to resize if a dimension is zero. |
| 520 |
if ( 0 == $image_args['width'] || 0 == $image_args['height'] ) { |
| 521 |
if ( 0 == $image_args['width'] && 0 < $image_args['height'] ) { |
| 522 |
$photon_args['h'] = $image_args['height']; |
| 523 |
} elseif ( 0 == $image_args['height'] && 0 < $image_args['width'] ) { |
| 524 |
$photon_args['w'] = $image_args['width']; |
| 525 |
} |
| 526 |
} else { |
| 527 |
if ( ( 'resize' === $transform ) && $image_meta = wp_get_attachment_metadata( $attachment_id ) ) { |
| 528 |
if ( isset( $image_meta['width'], $image_meta['height'] ) ) { |
| 529 |
// Lets make sure that we don't upscale images since wp never upscales them as well |
| 530 |
$smaller_width = ( ( $image_meta['width'] < $image_args['width'] ) ? $image_meta['width'] : $image_args['width'] ); |
| 531 |
$smaller_height = ( ( $image_meta['height'] < $image_args['height'] ) ? $image_meta['height'] : $image_args['height'] ); |
| 532 |
|
| 533 |
$photon_args[ $transform ] = $smaller_width . ',' . $smaller_height; |
| 534 |
} |
| 535 |
} else { |
| 536 |
$photon_args[ $transform ] = $image_args['width'] . ',' . $image_args['height']; |
| 537 |
} |
| 538 |
|
| 539 |
} |
| 540 |
|
| 541 |
|
| 542 |
/** |
| 543 |
* Filter the Photon Arguments added to an image when going through Photon, when that image size is a string. |
| 544 |
* Image size will be a string (e.g. "full", "medium") when it is known to WordPress. |
| 545 |
* |
| 546 |
* @module photon |
| 547 |
* |
| 548 |
* @since 2.0.0 |
| 549 |
* |
| 550 |
* @param array $photon_args Array of Photon arguments. |
| 551 |
* @param array $args { |
| 552 |
* Array of image details. |
| 553 |
* |
| 554 |
* @type $image_args Array of Image arguments (width, height, crop). |
| 555 |
* @type $image_url Image URL. |
| 556 |
* @type $attachment_id Attachment ID of the image. |
| 557 |
* @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer. |
| 558 |
* @type $transform Value can be resize or fit. |
| 559 |
* @see https://developer.wordpress.com/docs/photon/api |
| 560 |
* } |
| 561 |
*/ |
| 562 |
$photon_args = apply_filters( 'jetpack_photon_image_downsize_string', $photon_args, compact( 'image_args', 'image_url', 'attachment_id', 'size', 'transform' ) ); |
| 563 |
|
| 564 |
// Generate Photon URL |
| 565 |
$image = array( |
| 566 |
jetpack_photon_url( $image_url, $photon_args ), |
| 567 |
$has_size_meta ? $image_args['width'] : false, |
| 568 |
$has_size_meta ? $image_args['height'] : false, |
| 569 |
$intermediate |
| 570 |
); |
| 571 |
} elseif ( is_array( $size ) ) { |
| 572 |
// Pull width and height values from the provided array, if possible |
| 573 |
$width = isset( $size[0] ) ? (int) $size[0] : false; |
| 574 |
$height = isset( $size[1] ) ? (int) $size[1] : false; |
| 575 |
|
| 576 |
// Don't bother if necessary parameters aren't passed. |
| 577 |
if ( ! $width || ! $height ) { |
| 578 |
return $image; |
| 579 |
} |
| 580 |
|
| 581 |
$image_meta = wp_get_attachment_metadata( $attachment_id ); |
| 582 |
if ( isset( $image_meta['width'], $image_meta['height'] ) ) { |
| 583 |
$image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $width, $height ); |
| 584 |
|
| 585 |
if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image. |
| 586 |
$width = $image_resized[6]; |
| 587 |
$height = $image_resized[7]; |
| 588 |
} else { |
| 589 |
$width = $image_meta['width']; |
| 590 |
$height = $image_meta['height']; |
| 591 |
} |
| 592 |
|
| 593 |
$has_size_meta = true; |
| 594 |
} |
| 595 |
|
| 596 |
list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size ); |
| 597 |
|
| 598 |
// Expose arguments to a filter before passing to Photon |
| 599 |
$photon_args = array( |
| 600 |
'fit' => $width . ',' . $height |
| 601 |
); |
| 602 |
|
| 603 |
/** |
| 604 |
* Filter the Photon Arguments added to an image when going through Photon, |
| 605 |
* when the image size is an array of height and width values. |
| 606 |
* |
| 607 |
* @module photon |
| 608 |
* |
| 609 |
* @since 2.0.0 |
| 610 |
* |
| 611 |
* @param array $photon_args Array of Photon arguments. |
| 612 |
* @param array $args { |
| 613 |
* Array of image details. |
| 614 |
* |
| 615 |
* @type $width Image width. |
| 616 |
* @type height Image height. |
| 617 |
* @type $image_url Image URL. |
| 618 |
* @type $attachment_id Attachment ID of the image. |
| 619 |
* } |
| 620 |
*/ |
| 621 |
$photon_args = apply_filters( 'jetpack_photon_image_downsize_array', $photon_args, compact( 'width', 'height', 'image_url', 'attachment_id' ) ); |
| 622 |
|
| 623 |
// Generate Photon URL |
| 624 |
$image = array( |
| 625 |
jetpack_photon_url( $image_url, $photon_args ), |
| 626 |
$has_size_meta ? $width : false, |
| 627 |
$has_size_meta ? $height : false, |
| 628 |
$intermediate |
| 629 |
); |
| 630 |
} |
| 631 |
} |
| 632 |
|
| 633 |
return $image; |
| 634 |
} |
| 635 |
|
| 636 |
/** |
| 637 |
* Filters an array of image `srcset` values, replacing each URL with its Photon equivalent. |
| 638 |
* |
| 639 |
* @since 3.8.0 |
| 640 |
* @since 4.0.4 Added automatically additional sizes beyond declared image sizes. |
| 641 |
* @param array $sources An array of image urls and widths. |
| 642 |
* @uses self::validate_image_url, jetpack_photon_url, Jetpack_Photon::parse_from_filename |
| 643 |
* @uses Jetpack_Photon::strip_image_dimensions_maybe, Jetpack::get_content_width |
| 644 |
* @return array An array of Photon image urls and widths. |
| 645 |
*/ |
| 646 |
public function filter_srcset_array( $sources = array(), $size_array = array(), $image_src = array(), $image_meta = array(), $attachment_id = 0 ) { |
| 647 |
if ( ! is_array( $sources ) ) { |
| 648 |
return $sources; |
| 649 |
} |
| 650 |
$upload_dir = wp_get_upload_dir(); |
| 651 |
|
| 652 |
foreach ( $sources as $i => $source ) { |
| 653 |
if ( ! self::validate_image_url( $source['url'] ) ) { |
| 654 |
continue; |
| 655 |
} |
| 656 |
|
| 657 |
/** This filter is already documented in class.photon.php */ |
| 658 |
if ( apply_filters( 'jetpack_photon_skip_image', false, $source['url'], $source ) ) { |
| 659 |
continue; |
| 660 |
} |
| 661 |
|
| 662 |
$url = $source['url']; |
| 663 |
list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $url ); |
| 664 |
|
| 665 |
// It's quicker to get the full size with the data we have already, if available |
| 666 |
if ( ! empty( $attachment_id ) ) { |
| 667 |
$url = wp_get_attachment_url( $attachment_id ); |
| 668 |
} else { |
| 669 |
$url = Jetpack_Photon::strip_image_dimensions_maybe( $url ); |
| 670 |
} |
| 671 |
|
| 672 |
$args = array(); |
| 673 |
if ( 'w' === $source['descriptor'] ) { |
| 674 |
if ( $height && ( $source['value'] == $width ) ) { |
| 675 |
$args['resize'] = $width . ',' . $height; |
| 676 |
} else { |
| 677 |
$args['w'] = $source['value']; |
| 678 |
} |
| 679 |
|
| 680 |
} |
| 681 |
|
| 682 |
$sources[ $i ]['url'] = jetpack_photon_url( $url, $args ); |
| 683 |
} |
| 684 |
|
| 685 |
/** |
| 686 |
* At this point, $sources is the original srcset with Photonized URLs. |
| 687 |
* Now, we're going to construct additional sizes based on multiples of the content_width. |
| 688 |
* This will reduce the gap between the largest defined size and the original image. |
| 689 |
*/ |
| 690 |
|
| 691 |
/** |
| 692 |
* Filter the multiplier Photon uses to create new srcset items. |
| 693 |
* Return false to short-circuit and bypass auto-generation. |
| 694 |
* |
| 695 |
* @module photon |
| 696 |
* |
| 697 |
* @since 4.0.4 |
| 698 |
* |
| 699 |
* @param array|bool $multipliers Array of multipliers to use or false to bypass. |
| 700 |
*/ |
| 701 |
$multipliers = apply_filters( 'jetpack_photon_srcset_multipliers', array( 2, 3 ) ); |
| 702 |
$url = trailingslashit( $upload_dir['baseurl'] ) . $image_meta['file']; |
| 703 |
|
| 704 |
if ( |
| 705 |
/** Short-circuit via jetpack_photon_srcset_multipliers filter. */ |
| 706 |
is_array( $multipliers ) |
| 707 |
/** This filter is already documented in class.photon.php */ |
| 708 |
&& ! apply_filters( 'jetpack_photon_skip_image', false, $url, null ) |
| 709 |
/** Verify basic meta is intact. */ |
| 710 |
&& isset( $image_meta['width'] ) && isset( $image_meta['height'] ) && isset( $image_meta['file'] ) |
| 711 |
/** Verify we have the requested width/height. */ |
| 712 |
&& isset( $size_array[0] ) && isset( $size_array[1] ) |
| 713 |
) { |
| 714 |
|
| 715 |
$fullwidth = $image_meta['width']; |
| 716 |
$fullheight = $image_meta['height']; |
| 717 |
$reqwidth = $size_array[0]; |
| 718 |
$reqheight = $size_array[1]; |
| 719 |
|
| 720 |
$constrained_size = wp_constrain_dimensions( $fullwidth, $fullheight, $reqwidth ); |
| 721 |
$expected_size = array( $reqwidth, $reqheight ); |
| 722 |
|
| 723 |
if ( abs( $constrained_size[0] - $expected_size[0] ) <= 1 && abs( $constrained_size[1] - $expected_size[1] ) <= 1 ) { |
| 724 |
$crop = 'soft'; |
| 725 |
$base = Jetpack::get_content_width() ? Jetpack::get_content_width() : 1000; // Provide a default width if none set by the theme. |
| 726 |
} else { |
| 727 |
$crop = 'hard'; |
| 728 |
$base = $reqwidth; |
| 729 |
} |
| 730 |
|
| 731 |
|
| 732 |
$currentwidths = array_keys( $sources ); |
| 733 |
$newsources = null; |
| 734 |
|
| 735 |
foreach ( $multipliers as $multiplier ) { |
| 736 |
|
| 737 |
$newwidth = $base * $multiplier; |
| 738 |
foreach ( $currentwidths as $currentwidth ){ |
| 739 |
// If a new width would be within 100 pixes of an existing one or larger than the full size image, skip. |
| 740 |
if ( abs( $currentwidth - $newwidth ) < 50 || ( $newwidth > $fullwidth ) ) { |
| 741 |
continue 2; // Back to the foreach ( $multipliers as $multiplier ) |
| 742 |
} |
| 743 |
} // foreach ( $currentwidths as $currentwidth ){ |
| 744 |
|
| 745 |
if ( 'soft' == $crop ) { |
| 746 |
$args = array( |
| 747 |
'w' => $newwidth, |
| 748 |
); |
| 749 |
} else { // hard crop, e.g. add_image_size( 'example', 200, 200, true ); |
| 750 |
$args = array( |
| 751 |
'zoom' => $multiplier, |
| 752 |
'resize' => $reqwidth . ',' . $reqheight, |
| 753 |
); |
| 754 |
} |
| 755 |
|
| 756 |
$newsources[ $newwidth ] = array( |
| 757 |
'url' => jetpack_photon_url( $url, $args ), |
| 758 |
'descriptor' => 'w', |
| 759 |
'value' => $newwidth, |
| 760 |
); |
| 761 |
} // foreach ( $multipliers as $multiplier ) |
| 762 |
if ( is_array( $newsources ) ) { |
| 763 |
if ( function_exists( 'array_replace' ) ) { // PHP 5.3+, preferred |
| 764 |
$sources = array_replace( $sources, $newsources ); |
| 765 |
} else { // For PHP 5.2 using WP shim function |
| 766 |
$sources = array_replace_recursive( $sources, $newsources ); |
| 767 |
} |
| 768 |
} |
| 769 |
} // if ( isset( $image_meta['width'] ) && isset( $image_meta['file'] ) ) |
| 770 |
|
| 771 |
return $sources; |
| 772 |
} |
| 773 |
|
| 774 |
/** |
| 775 |
* Filters an array of image `sizes` values, using $content_width instead of image's full size. |
| 776 |
* |
| 777 |
* @since 4.0.4 |
| 778 |
* @since 4.1.0 Returns early for images not within the_content. |
| 779 |
* @param array $sizes An array of media query breakpoints. |
| 780 |
* @param array $size Width and height of the image |
| 781 |
* @uses Jetpack::get_content_width |
| 782 |
* @return array An array of media query breakpoints. |
| 783 |
*/ |
| 784 |
public function filter_sizes( $sizes, $size ) { |
| 785 |
if ( ! doing_filter( 'the_content' ) ){ |
| 786 |
return $sizes; |
| 787 |
} |
| 788 |
$content_width = Jetpack::get_content_width(); |
| 789 |
if ( ! $content_width ) { |
| 790 |
$content_width = 1000; |
| 791 |
} |
| 792 |
|
| 793 |
if ( ( is_array( $size ) && $size[0] < $content_width ) ) { |
| 794 |
return $sizes; |
| 795 |
} |
| 796 |
|
| 797 |
return sprintf( '(max-width: %1$dpx) 100vw, %1$dpx', $content_width ); |
| 798 |
} |
| 799 |
|
| 800 |
/** |
| 801 |
** GENERAL FUNCTIONS |
| 802 |
**/ |
| 803 |
|
| 804 |
/** |
| 805 |
* Ensure image URL is valid for Photon. |
| 806 |
* 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. |
| 807 |
* |
| 808 |
* @param string $url |
| 809 |
* @uses wp_parse_args |
| 810 |
* @return bool |
| 811 |
*/ |
| 812 |
protected static function validate_image_url( $url ) { |
| 813 |
$parsed_url = @parse_url( $url ); |
| 814 |
|
| 815 |
if ( ! $parsed_url ) |
| 816 |
return false; |
| 817 |
|
| 818 |
// Parse URL and ensure needed keys exist, since the array returned by `parse_url` only includes the URL components it finds. |
| 819 |
$url_info = wp_parse_args( $parsed_url, array( |
| 820 |
'scheme' => null, |
| 821 |
'host' => null, |
| 822 |
'port' => null, |
| 823 |
'path' => null |
| 824 |
) ); |
| 825 |
|
| 826 |
// Bail if scheme isn't http or port is set that isn't port 80 |
| 827 |
if ( |
| 828 |
( 'http' != $url_info['scheme'] || ! in_array( $url_info['port'], array( 80, null ) ) ) && |
| 829 |
/** |
| 830 |
* Allow Photon to fetch images that are served via HTTPS. |
| 831 |
* |
| 832 |
* @module photon |
| 833 |
* |
| 834 |
* @since 2.4.0 |
| 835 |
* @since 3.9.0 Default to false. |
| 836 |
* |
| 837 |
* @param bool $reject_https Should Photon ignore images using the HTTPS scheme. Default to false. |
| 838 |
*/ |
| 839 |
apply_filters( 'jetpack_photon_reject_https', false ) |
| 840 |
) { |
| 841 |
return false; |
| 842 |
} |
| 843 |
|
| 844 |
// Bail if no host is found |
| 845 |
if ( is_null( $url_info['host'] ) ) |
| 846 |
return false; |
| 847 |
|
| 848 |
// Bail if the image alredy went through Photon |
| 849 |
if ( preg_match( '#^i[\d]{1}.wp.com$#i', $url_info['host'] ) ) |
| 850 |
return false; |
| 851 |
|
| 852 |
// Bail if no path is found |
| 853 |
if ( is_null( $url_info['path'] ) ) |
| 854 |
return false; |
| 855 |
|
| 856 |
// Ensure image extension is acceptable |
| 857 |
if ( ! in_array( strtolower( pathinfo( $url_info['path'], PATHINFO_EXTENSION ) ), self::$extensions ) ) |
| 858 |
return false; |
| 859 |
|
| 860 |
// If we got this far, we should have an acceptable image URL |
| 861 |
// But let folks filter to decline if they prefer. |
| 862 |
/** |
| 863 |
* Overwrite the results of the validation steps an image goes through before to be considered valid to be used by Photon. |
| 864 |
* |
| 865 |
* @module photon |
| 866 |
* |
| 867 |
* @since 3.0.0 |
| 868 |
* |
| 869 |
* @param bool true Is the image URL valid and can it be used by Photon. Default to true. |
| 870 |
* @param string $url Image URL. |
| 871 |
* @param array $parsed_url Array of information about the image. |
| 872 |
*/ |
| 873 |
return apply_filters( 'photon_validate_image_url', true, $url, $parsed_url ); |
| 874 |
} |
| 875 |
|
| 876 |
/** |
| 877 |
* Checks if the file exists before it passes the file to photon |
| 878 |
* |
| 879 |
* @param string $src The image URL |
| 880 |
* @return string |
| 881 |
**/ |
| 882 |
protected static function strip_image_dimensions_maybe( $src ){ |
| 883 |
$stripped_src = $src; |
| 884 |
|
| 885 |
// Build URL, first removing WP's resized string so we pass the original image to Photon |
| 886 |
if ( preg_match( '#(-\d+x\d+)\.(' . implode('|', self::$extensions ) . '){1}$#i', $src, $src_parts ) ) { |
| 887 |
$stripped_src = str_replace( $src_parts[1], '', $src ); |
| 888 |
$upload_dir = wp_get_upload_dir(); |
| 889 |
|
| 890 |
// Extracts the file path to the image minus the base url |
| 891 |
$file_path = substr( $stripped_src, strlen ( $upload_dir['baseurl'] ) ); |
| 892 |
|
| 893 |
if( file_exists( $upload_dir["basedir"] . $file_path ) ) |
| 894 |
$src = $stripped_src; |
| 895 |
} |
| 896 |
|
| 897 |
return $src; |
| 898 |
} |
| 899 |
|
| 900 |
/** |
| 901 |
* Provide an array of available image sizes and corresponding dimensions. |
| 902 |
* Similar to get_intermediate_image_sizes() except that it includes image sizes' dimensions, not just their names. |
| 903 |
* |
| 904 |
* @global $wp_additional_image_sizes |
| 905 |
* @uses get_option |
| 906 |
* @return array |
| 907 |
*/ |
| 908 |
protected static function image_sizes() { |
| 909 |
if ( null == self::$image_sizes ) { |
| 910 |
global $_wp_additional_image_sizes; |
| 911 |
|
| 912 |
// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes |
| 913 |
$images = array( |
| 914 |
'thumb' => array( |
| 915 |
'width' => intval( get_option( 'thumbnail_size_w' ) ), |
| 916 |
'height' => intval( get_option( 'thumbnail_size_h' ) ), |
| 917 |
'crop' => (bool) get_option( 'thumbnail_crop' ) |
| 918 |
), |
| 919 |
'medium' => array( |
| 920 |
'width' => intval( get_option( 'medium_size_w' ) ), |
| 921 |
'height' => intval( get_option( 'medium_size_h' ) ), |
| 922 |
'crop' => false |
| 923 |
), |
| 924 |
'large' => array( |
| 925 |
'width' => intval( get_option( 'large_size_w' ) ), |
| 926 |
'height' => intval( get_option( 'large_size_h' ) ), |
| 927 |
'crop' => false |
| 928 |
), |
| 929 |
'full' => array( |
| 930 |
'width' => null, |
| 931 |
'height' => null, |
| 932 |
'crop' => false |
| 933 |
) |
| 934 |
); |
| 935 |
|
| 936 |
// Compatibility mapping as found in wp-includes/media.php |
| 937 |
$images['thumbnail'] = $images['thumb']; |
| 938 |
|
| 939 |
// Update class variable, merging in $_wp_additional_image_sizes if any are set |
| 940 |
if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) ) |
| 941 |
self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes ); |
| 942 |
else |
| 943 |
self::$image_sizes = $images; |
| 944 |
} |
| 945 |
|
| 946 |
return is_array( self::$image_sizes ) ? self::$image_sizes : array(); |
| 947 |
} |
| 948 |
|
| 949 |
/** |
| 950 |
* Pass og:image URLs through Photon |
| 951 |
* |
| 952 |
* @param array $tags |
| 953 |
* @param array $parameters |
| 954 |
* @uses jetpack_photon_url |
| 955 |
* @return array |
| 956 |
*/ |
| 957 |
function filter_open_graph_tags( $tags, $parameters ) { |
| 958 |
if ( empty( $tags['og:image'] ) ) { |
| 959 |
return $tags; |
| 960 |
} |
| 961 |
|
| 962 |
$photon_args = array( |
| 963 |
'fit' => sprintf( '%d,%d', 2 * $parameters['image_width'], 2 * $parameters['image_height'] ), |
| 964 |
); |
| 965 |
|
| 966 |
if ( is_array( $tags['og:image'] ) ) { |
| 967 |
$images = array(); |
| 968 |
foreach ( $tags['og:image'] as $image ) { |
| 969 |
$images[] = jetpack_photon_url( $image, $photon_args ); |
| 970 |
} |
| 971 |
$tags['og:image'] = $images; |
| 972 |
} else { |
| 973 |
$tags['og:image'] = jetpack_photon_url( $tags['og:image'], $photon_args ); |
| 974 |
} |
| 975 |
|
| 976 |
return $tags; |
| 977 |
} |
| 978 |
|
| 979 |
/** |
| 980 |
* Enqueue Photon helper script |
| 981 |
* |
| 982 |
* @uses wp_enqueue_script, plugins_url |
| 983 |
* @action wp_enqueue_script |
| 984 |
* @return null |
| 985 |
*/ |
| 986 |
public function action_wp_enqueue_scripts() { |
| 987 |
wp_enqueue_script( 'jetpack-photon', plugins_url( 'modules/photon/photon.js', JETPACK__PLUGIN_FILE ), array( 'jquery' ), 20130122, true ); |
| 988 |
} |
| 989 |
} |
| 990 |
|
