class.photon.php — Jetpack – WP Security, Backup, Speed, & Growth 7.1.3

jetpack / class.photon.php

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class.photon.php

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1	<?php
2
3	class Jetpack_Photon {
4	/**
5	* Class variables
6	*/
7	// Oh look, a singleton
8	private static $__instance = null;
9
10	// Allowed extensions must match http://code.trac.wordpress.org/browser/photon/index.php#L31
11	protected static $extensions = array(
12	'gif',
13	'jpg',
14	'jpeg',
15	'png'
16	);
17
18	// Don't access this directly. Instead, use self::image_sizes() so it's actually populated with something.
19	protected static $image_sizes = null;
20
21	/**
22	* Singleton implementation
23	*
24	* @return object
25	*/
26	public static function instance() {
27	if ( ! is_a( self::$__instance, 'Jetpack_Photon' ) ) {
28	self::$__instance = new Jetpack_Photon;
29	self::$__instance->setup();
30	}
31
32	return self::$__instance;
33	}
34
35	/**
36	* Silence is golden.
37	*/
38	private function __construct() {}
39
40	/**
41	* Register actions and filters, but only if basic Photon functions are available.
42	* The basic functions are found in ./functions.photon.php.
43	*
44	* @uses add_action, add_filter
45	* @return null
46	*/
47	private function setup() {
48	if ( ! function_exists( 'jetpack_photon_url' ) ) {
49	return;
50	}
51
52	// Images in post content and galleries
53	add_filter( 'the_content', array( __CLASS__, 'filter_the_content' ), 999999 );
54	add_filter( 'get_post_galleries', array( __CLASS__, 'filter_the_galleries' ), 999999 );
55	add_filter( 'widget_media_image_instance', array( __CLASS__, 'filter_the_image_widget' ), 999999 );
56
57	// Core image retrieval
58	add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 10, 3 );
59	add_filter( 'rest_request_before_callbacks', array( $this, 'should_rest_photon_image_downsize' ), 10, 3 );
60	add_filter( 'rest_request_after_callbacks', array( $this, 'cleanup_rest_photon_image_downsize' ) );
61
62	// Responsive image srcset substitution
63	add_filter( 'wp_calculate_image_srcset', array( $this, 'filter_srcset_array' ), 10, 5 );
64	add_filter( 'wp_calculate_image_sizes', array( $this, 'filter_sizes' ), 1, 2 ); // Early so themes can still easily filter.
65
66	// Helpers for maniuplated images
67	add_action( 'wp_enqueue_scripts', array( $this, 'action_wp_enqueue_scripts' ), 9 );
68
69	/**
70	* Allow Photon to disable uploaded images resizing and use its own resize capabilities instead.
71	*
72	* @module photon
73	*
74	* @since 7.1.0
75	*
76	* @param bool false Should Photon enable noresize mode. Default to false.
77	*/
78	if ( apply_filters( 'jetpack_photon_noresize_mode', false ) ) {
79	$this->enable_noresize_mode();
80	}
81	}
82
83	/**
84	* Enables the noresize mode for Photon, allowing to avoid intermediate size files generation.
85	*/
86	private function enable_noresize_mode() {
87	jetpack_require_lib( 'class.jetpack-photon-image-sizes' );
88
89	// The main objective of noresize mode is to disable additional resized image versions creation.
90	// This filter handles removal of additional sizes.
91	add_filter( 'intermediate_image_sizes_advanced', array( __CLASS__, 'filter_photon_noresize_intermediate_sizes' ) );
92
93	// Load the noresize srcset solution on priority of 20, allowing other plugins to set sizes earlier.
94	add_filter( 'wp_get_attachment_metadata', array( __CLASS__, 'filter_photon_norezise_maybe_inject_sizes' ), 20, 2 );
95
96	// Photonize thumbnail URLs in the API response.
97	add_filter( 'rest_api_thumbnail_size_urls', array( __CLASS__, 'filter_photon_noresize_thumbnail_urls' ) );
98
99	// This allows to assign the Photon domain to images that normally use the home URL as base.
100	add_filter( 'jetpack_photon_domain', array( __CLASS__, 'filter_photon_norezise_domain' ), 10, 2 );
101
102	add_filter( 'the_content', array( __CLASS__, 'filter_content_add' ), 0 );
103
104	// Jetpack hooks in at six nines (999999) so this filter does at seven.
105	add_filter( 'the_content', array( __CLASS__, 'filter_content_remove' ), 9999999 );
106
107	// Regular Photon operation mode filter doesn't run when is_admin(), so we need an additional filter.
108	// This is temporary until Jetpack allows more easily running these filters for is_admin().
109	if ( is_admin() ) {
110	add_filter( 'image_downsize', array( $this, 'filter_image_downsize' ), 5, 3 );
111
112	// Allows any image that gets passed to Photon to be resized via Photon.
113	add_filter( 'jetpack_photon_admin_allow_image_downsize', '__return_true' );
114	}
115	}
116
117	/**
118	* This is our catch-all to strip dimensions from intermediate images in content.
119	* Since this primarily only impacts post_content we do a little dance to add the filter early
120	* to `the_content` and then remove it later on in the same hook.
121	*
122	* @param String $content the post content.
123	* @return String the post content unchanged.
124	*/
125	public static function filter_content_add( $content ) {
126	add_filter( 'jetpack_photon_pre_image_url', array( __CLASS__, 'strip_image_dimensions_maybe' ) );
127	return $content;
128	}
129
130	/**
131	* Removing the content filter that was set previously.
132	*
133	* @param String $content the post content.
134	* @return String the post content unchanged.
135	*/
136	public static function filter_content_remove( $content ) {
137	remove_filter( 'jetpack_photon_pre_image_url', array( __CLASS__, 'strip_image_dimensions_maybe' ) );
138	return $content;
139	}
140
141	/**
142	* Short circuits the Photon filter to enable Photon processing for any URL.
143	*
144	* @param String $photon_url a proposed Photon URL for the media file.
145	* @param String $image_url the original media URL.
146	* @return String an URL to be used for the media file.
147	*/
148	public static function filter_photon_norezise_domain( $photon_url, $image_url ) {
149	return $photon_url;
150	}
151
152	/**
153	* Disables intermediate sizes to disallow resizing.
154	*
155	* @param Array $sizes an array containing image sizes.
156	* @return Boolean
157	*/
158	public static function filter_photon_noresize_intermediate_sizes( $sizes ) {
159	return array();
160	}
161
162	public static function filter_photon_noresize_thumbnail_urls( $sizes ) {
163	foreach ( $sizes as $size => $url ) {
164	$parts = explode( '?', $url );
165	$arguments = isset( $parts[1] ) ? $parts[1] : array();
166
167	$sizes[ $size ] = jetpack_photon_url( $url, wp_parse_args( $arguments ) );
168	}
169
170	return $sizes;
171	}
172
173	/**
174	* Inject image sizes to attachment metadata.
175	*
176	* @param array $data Attachment metadata.
177	* @param int $attachment_id Attachment's post ID.
178	*
179	* @return array Attachment metadata.
180	*/
181	public static function filter_photon_norezise_maybe_inject_sizes( $data, $attachment_id ) {
182	// Can't do much if data is empty.
183	if ( empty( $data ) ) {
184	return $data;
185	}
186	$sizes_already_exist = (
187	true === is_array( $data )
188	&& true === array_key_exists( 'sizes', $data )
189	&& true === is_array( $data['sizes'] )
190	&& false === empty( $data['sizes'] )
191	);
192	if ( $sizes_already_exist ) {
193	return $data;
194	}
195	// Missing some critical data we need to determine sizes, not processing.
196	if ( ! isset( $data['file'] )
197	\|\| ! isset( $data['width'] )
198	\|\| ! isset( $data['height'] )
199	) {
200	return $data;
201	}
202
203	$mime_type = get_post_mime_type( $attachment_id );
204	$attachment_is_image = preg_match( '!^image/!', $mime_type );
205
206	if ( 1 === $attachment_is_image ) {
207	$image_sizes = new Jetpack_Photon_ImageSizes( $attachment_id, $data );
208	$data['sizes'] = $image_sizes->generate_sizes_meta();
209	}
210	return $data;
211	}
212
213	/**
214	* Inject image sizes to Jetpack REST API responses. This wraps the filter_photon_norezise_maybe_inject_sizes function.
215	*
216	* @param array $data Attachment sizes data.
217	* @param int $attachment_id Attachment's post ID.
218	*
219	* @return array Attachment sizes array.
220	*/
221	public static function filter_photon_norezise_maybe_inject_sizes_api( $sizes, $attachment_id ) {
222	return self::filter_photon_norezise_maybe_inject_sizes( wp_get_attachment_metadata( $attachment_id ), $attachment_id );
223	}
224
225	/**
226	** IN-CONTENT IMAGE MANIPULATION FUNCTIONS
227	**/
228
229	/**
230	* Match all images and any relevant <a> tags in a block of HTML.
231	*
232	* @param string $content Some HTML.
233	* @return array An array of $images matches, where $images[0] is
234	* an array of full matches, and the link_url, img_tag,
235	* and img_url keys are arrays of those matches.
236	*/
237	public static function parse_images_from_html( $content ) {
238	$images = array();
239
240	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 ) ) {
241	foreach ( $images as $key => $unused ) {
242	// Simplify the output as much as possible, mostly for confirming test results.
243	if ( is_numeric( $key ) && $key > 0 )
244	unset( $images[$key] );
245	}
246
247	return $images;
248	}
249
250	return array();
251	}
252
253	/**
254	* Try to determine height and width from strings WP appends to resized image filenames.
255	*
256	* @param string $src The image URL.
257	* @return array An array consisting of width and height.
258	*/
259	public static function parse_dimensions_from_filename( $src ) {
260	$width_height_string = array();
261
262	if ( preg_match( '#-(\d+)x(\d+)\.(?:' . implode('\|', self::$extensions ) . '){1}$#i', $src, $width_height_string ) ) {
263	$width = (int) $width_height_string[1];
264	$height = (int) $width_height_string[2];
265
266	if ( $width && $height )
267	return array( $width, $height );
268	}
269
270	return array( false, false );
271	}
272
273	/**
274	* Identify images in post content, and if images are local (uploaded to the current site), pass through Photon.
275	*
276	* @param string $content
277	* @uses self::validate_image_url, apply_filters, jetpack_photon_url, esc_url
278	* @filter the_content
279	* @return string
280	*/
281	public static function filter_the_content( $content ) {
282	$images = Jetpack_Photon::parse_images_from_html( $content );
283
284	if ( ! empty( $images ) ) {
285	$content_width = Jetpack::get_content_width();
286
287	$image_sizes = self::image_sizes();
288	$upload_dir = wp_get_upload_dir();
289
290	foreach ( $images[0] as $index => $tag ) {
291	// Default to resize, though fit may be used in certain cases where a dimension cannot be ascertained
292	$transform = 'resize';
293
294	// Start with a clean attachment ID each time
295	$attachment_id = false;
296
297	// Flag if we need to munge a fullsize URL
298	$fullsize_url = false;
299
300	// Identify image source
301	$src = $src_orig = $images['img_url'][ $index ];
302
303	/**
304	* Allow specific images to be skipped by Photon.
305	*
306	* @module photon
307	*
308	* @since 2.0.3
309	*
310	* @param bool false Should Photon ignore this image. Default to false.
311	* @param string $src Image URL.
312	* @param string $tag Image Tag (Image HTML output).
313	*/
314	if ( apply_filters( 'jetpack_photon_skip_image', false, $src, $tag ) )
315	continue;
316
317	// Support Automattic's Lazy Load plugin
318	// Can't modify $tag yet as we need unadulterated version later
319	if ( preg_match( '#data-lazy-src=["\|\'](.+?)["\|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) {
320	$placeholder_src = $placeholder_src_orig = $src;
321	$src = $src_orig = $lazy_load_src[1];
322	} elseif ( preg_match( '#data-lazy-original=["\|\'](.+?)["\|\']#i', $images['img_tag'][ $index ], $lazy_load_src ) ) {
323	$placeholder_src = $placeholder_src_orig = $src;
324	$src = $src_orig = $lazy_load_src[1];
325	}
326
327	// Check if image URL should be used with Photon
328	if ( self::validate_image_url( $src ) ) {
329	// Find the width and height attributes
330	$width = $height = false;
331
332	// First, check the image tag
333	if ( preg_match( '#width=["\|\']?([\d%]+)["\|\']?#i', $images['img_tag'][ $index ], $width_string ) )
334	$width = $width_string[1];
335
336	if ( preg_match( '#height=["\|\']?([\d%]+)["\|\']?#i', $images['img_tag'][ $index ], $height_string ) )
337	$height = $height_string[1];
338
339	// Can't pass both a relative width and height, so unset the height in favor of not breaking the horizontal layout.
340	if ( false !== strpos( $width, '%' ) && false !== strpos( $height, '%' ) )
341	$width = $height = false;
342
343	// Detect WP registered image size from HTML class
344	if ( preg_match( '#class=["\|\']?[^"\']size-([^"\'\s]+)[^"\']["\|\']?#i', $images['img_tag'][ $index ], $size ) ) {
345	$size = array_pop( $size );
346
347	if ( false === $width && false === $height && 'full' != $size && array_key_exists( $size, $image_sizes ) ) {
348	$width = (int) $image_sizes[ $size ]['width'];
349	$height = (int) $image_sizes[ $size ]['height'];
350	$transform = $image_sizes[ $size ]['crop'] ? 'resize' : 'fit';
351	}
352	} else {
353	unset( $size );
354	}
355
356	// WP Attachment ID, if uploaded to this site
357	if (
358	preg_match( '#class=["\|\']?[^"\']wp-image-([\d]+)[^"\']["\|\']?#i', $images['img_tag'][ $index ], $attachment_id ) &&
359	0 === strpos( $src, $upload_dir['baseurl'] ) &&
360	/**
361	* Filter whether an image using an attachment ID in its class has to be uploaded to the local site to go through Photon.
362	*
363	* @module photon
364	*
365	* @since 2.0.3
366	*
367	* @param bool false Was the image uploaded to the local site. Default to false.
368	* @param array $args {
369	* Array of image details.
370	*
371	* @type $src Image URL.
372	* @type tag Image tag (Image HTML output).
373	* @type $images Array of information about the image.
374	* @type $index Image index.
375	* }
376	*/
377	apply_filters( 'jetpack_photon_image_is_local', false, compact( 'src', 'tag', 'images', 'index' ) )
378	) {
379	$attachment_id = intval( array_pop( $attachment_id ) );
380
381	if ( $attachment_id ) {
382	$attachment = get_post( $attachment_id );
383
384	// Basic check on returned post object
385	if ( is_object( $attachment ) && ! is_wp_error( $attachment ) && 'attachment' == $attachment->post_type ) {
386	$src_per_wp = wp_get_attachment_image_src( $attachment_id, isset( $size ) ? $size : 'full' );
387
388	if ( self::validate_image_url( $src_per_wp[0] ) ) {
389	$src = $src_per_wp[0];
390	$fullsize_url = true;
391
392	// Prevent image distortion if a detected dimension exceeds the image's natural dimensions
393	if ( ( false !== $width && $width > $src_per_wp[1] ) \|\| ( false !== $height && $height > $src_per_wp[2] ) ) {
394	$width = false === $width ? false : min( $width, $src_per_wp[1] );
395	$height = false === $height ? false : min( $height, $src_per_wp[2] );
396	}
397
398	// If no width and height are found, max out at source image's natural dimensions
399	// Otherwise, respect registered image sizes' cropping setting
400	if ( false === $width && false === $height ) {
401	$width = $src_per_wp[1];
402	$height = $src_per_wp[2];
403	$transform = 'fit';
404	} elseif ( isset( $size ) && array_key_exists( $size, $image_sizes ) && isset( $image_sizes[ $size ]['crop'] ) ) {
405	$transform = (bool) $image_sizes[ $size ]['crop'] ? 'resize' : 'fit';
406	}
407	}
408	} else {
409	unset( $attachment_id );
410	unset( $attachment );
411	}
412	}
413	}
414
415	// If image tag lacks width and height arguments, try to determine from strings WP appends to resized image filenames.
416	if ( false === $width && false === $height ) {
417	list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $src );
418	}
419
420	// If width is available, constrain to $content_width
421	if ( false !== $width && false === strpos( $width, '%' ) && is_numeric( $content_width ) ) {
422	if ( $width > $content_width && false !== $height && false === strpos( $height, '%' ) ) {
423	$height = round( ( $content_width * $height ) / $width );
424	$width = $content_width;
425	} elseif ( $width > $content_width ) {
426	$width = $content_width;
427	}
428	}
429
430	// Set a width if none is found and $content_width is available
431	// If width is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing
432	if ( false === $width && is_numeric( $content_width ) ) {
433	$width = (int) $content_width;
434
435	if ( false !== $height )
436	$transform = 'fit';
437	}
438
439	// Detect if image source is for a custom-cropped thumbnail and prevent further URL manipulation.
440	if ( ! $fullsize_url && preg_match_all( '#-e[a-z0-9]+(-\d+x\d+)?\.(' . implode('\|', self::$extensions ) . '){1}$#i', basename( $src ), $filename ) )
441	$fullsize_url = true;
442
443	// Build URL, first maybe removing WP's resized string so we pass the original image to Photon
444	if ( ! $fullsize_url ) {
445	$src = self::strip_image_dimensions_maybe( $src );
446	}
447
448	// Build array of Photon args and expose to filter before passing to Photon URL function
449	$args = array();
450
451	if ( false !== $width && false !== $height && false === strpos( $width, '%' ) && false === strpos( $height, '%' ) )
452	$args[ $transform ] = $width . ',' . $height;
453	elseif ( false !== $width )
454	$args['w'] = $width;
455	elseif ( false !== $height )
456	$args['h'] = $height;
457
458	/**
459	* Filter the array of Photon arguments added to an image when it goes through Photon.
460	* By default, only includes width and height values.
461	* @see https://developer.wordpress.com/docs/photon/api/
462	*
463	* @module photon
464	*
465	* @since 2.0.0
466	*
467	* @param array $args Array of Photon Arguments.
468	* @param array $args {
469	* Array of image details.
470	*
471	* @type $tag Image tag (Image HTML output).
472	* @type $src Image URL.
473	* @type $src_orig Original Image URL.
474	* @type $width Image width.
475	* @type $height Image height.
476	* }
477	*/
478	$args = apply_filters( 'jetpack_photon_post_image_args', $args, compact( 'tag', 'src', 'src_orig', 'width', 'height' ) );
479
480	$photon_url = jetpack_photon_url( $src, $args );
481
482	// Modify image tag if Photon function provides a URL
483	// 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.
484	if ( $src != $photon_url ) {
485	$new_tag = $tag;
486
487	// If present, replace the link href with a Photoned URL for the full-size image.
488	if ( ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) )
489	$new_tag = preg_replace( '#(href=["\|\'])' . $images['link_url'][ $index ] . '(["\|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $new_tag, 1 );
490
491	// Supplant the original source value with our Photon URL
492	$photon_url = esc_url( $photon_url );
493	$new_tag = str_replace( $src_orig, $photon_url, $new_tag );
494
495	// If Lazy Load is in use, pass placeholder image through Photon
496	if ( isset( $placeholder_src ) && self::validate_image_url( $placeholder_src ) ) {
497	$placeholder_src = jetpack_photon_url( $placeholder_src );
498
499	if ( $placeholder_src != $placeholder_src_orig )
500	$new_tag = str_replace( $placeholder_src_orig, esc_url( $placeholder_src ), $new_tag );
501
502	unset( $placeholder_src );
503	}
504
505	// If we are not transforming the image with resize, fit, or letterbox (lb), then we should remove
506	// the width and height arguments from the image to prevent distortion. Even if $args['w'] and $args['h']
507	// are present, Photon does not crop to those dimensions. Instead, it appears to favor height.
508	//
509	// If we are transforming the image via one of those methods, let's update the width and height attributes.
510	if ( empty( $args['resize'] ) && empty( $args['fit'] ) && empty( $args['lb'] ) ) {
511	$new_tag = preg_replace( '#(?<=\s)(width\|height)=["\|\']?[\d%]+["\|\']?\s?#i', '', $new_tag );
512	} else {
513	$resize_args = isset( $args['resize'] ) ? $args['resize'] : false;
514	if ( false == $resize_args ) {
515	$resize_args = ( ! $resize_args && isset( $args['fit'] ) )
516	? $args['fit']
517	: false;
518	}
519	if ( false == $resize_args ) {
520	$resize_args = ( ! $resize_args && isset( $args['lb'] ) )
521	? $args['lb']
522	: false;
523	}
524
525	$resize_args = array_map( 'trim', explode( ',', $resize_args ) );
526
527	// (?<=\s) - Ensure width or height attribute is preceded by a space
528	// (width=["\|\']?) - Matches, and captures, width=, width=", or width='
529	// [\d%]+ - Matches 1 or more digits
530	// (["\|\']?) - Matches, and captures, ", ', or empty string
531	// \s - Ensures there's a space after the attribute
532	$new_tag = preg_replace( '#(?<=\s)(width=["\|\']?)[\d%]+(["\|\']?)\s?#i', sprintf( '${1}%d${2} ', $resize_args[0] ), $new_tag );
533	$new_tag = preg_replace( '#(?<=\s)(height=["\|\']?)[\d%]+(["\|\']?)\s?#i', sprintf( '${1}%d${2} ', $resize_args[1] ), $new_tag );
534	}
535
536	// Tag an image for dimension checking
537	$new_tag = preg_replace( '#(\s?/)?>(\s*</a>)?$#i', ' data-recalc-dims="1"\1>\2', $new_tag );
538
539	// Replace original tag with modified version
540	$content = str_replace( $tag, $new_tag, $content );
541	}
542	} elseif ( preg_match( '#^http(s)?://i[\d]{1}.wp.com#', $src ) && ! empty( $images['link_url'][ $index ] ) && self::validate_image_url( $images['link_url'][ $index ] ) ) {
543	$new_tag = preg_replace( '#(href=["\|\'])' . $images['link_url'][ $index ] . '(["\|\'])#i', '\1' . jetpack_photon_url( $images['link_url'][ $index ] ) . '\2', $tag, 1 );
544
545	$content = str_replace( $tag, $new_tag, $content );
546	}
547	}
548	}
549
550	return $content;
551	}
552
553	public static function filter_the_galleries( $galleries ) {
554	if ( empty( $galleries ) \|\| ! is_array( $galleries ) ) {
555	return $galleries;
556	}
557
558	// Pass by reference, so we can modify them in place.
559	foreach ( $galleries as &$this_gallery ) {
560	if ( is_string( $this_gallery ) ) {
561	$this_gallery = self::filter_the_content( $this_gallery );
562	// LEAVING COMMENTED OUT as for the moment it doesn't seem
563	// necessary and I'm not sure how it would propagate through.
564	// } elseif ( is_array( $this_gallery )
565	// && ! empty( $this_gallery['src'] )
566	// && ! empty( $this_gallery['type'] )
567	// && in_array( $this_gallery['type'], array( 'rectangle', 'square', 'circle' ) ) ) {
568	// $this_gallery['src'] = array_map( 'jetpack_photon_url', $this_gallery['src'] );
569	}
570	}
571	unset( $this_gallery ); // break the reference.
572
573	return $galleries;
574	}
575
576
577	/**
578	* Runs the image widget through photon.
579	*
580	* @param array $instance Image widget instance data.
581	* @return array
582	*/
583	public static function filter_the_image_widget( $instance ) {
584	if ( Jetpack::is_module_active( 'photon' ) && ! $instance['attachment_id'] && $instance['url'] ) {
585	jetpack_photon_url( $instance['url'], array(
586	'w' => $instance['width'],
587	'h' => $instance['height'],
588	) );
589	}
590
591	return $instance;
592	}
593
594	/**
595	** CORE IMAGE RETRIEVAL
596	**/
597
598	/**
599	* Filter post thumbnail image retrieval, passing images through Photon
600	*
601	* @param string\|bool $image
602	* @param int $attachment_id
603	* @param string\|array $size
604	* @uses is_admin, apply_filters, wp_get_attachment_url, self::validate_image_url, this::image_sizes, jetpack_photon_url
605	* @filter image_downsize
606	* @return string\|bool
607	*/
608	public function filter_image_downsize( $image, $attachment_id, $size ) {
609	// Don't foul up the admin side of things, unless a plugin wants to.
610	if ( is_admin() &&
611	/**
612	* Provide plugins a way of running Photon for images in the WordPress Dashboard (wp-admin).
613	*
614	* 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.
615	*
616	* @module photon
617	*
618	* @since 4.8.0
619	*
620	* @param bool false Stop Photon from being run on the Dashboard. Default to false.
621	* @param array $args {
622	* Array of image details.
623	*
624	* @type $image Image URL.
625	* @type $attachment_id Attachment ID of the image.
626	* @type $size Image size. Can be a string (name of the image size, e.g. full) or an array of width and height.
627	* }
628	*/
629	false === apply_filters( 'jetpack_photon_admin_allow_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) )
630	) {
631	return $image;
632	}
633
634	/**
635	* Provide plugins a way of preventing Photon from being applied to images retrieved from WordPress Core.
636	*
637	* @module photon
638	*
639	* @since 2.0.0
640	*
641	* @param bool false Stop Photon from being applied to the image. Default to false.
642	* @param array $args {
643	* Array of image details.
644	*
645	* @type $image Image URL.
646	* @type $attachment_id Attachment ID of the image.
647	* @type $size Image size. Can be a string (name of the image size, e.g. full) or an array of width and height.
648	* }
649	*/
650	if ( apply_filters( 'jetpack_photon_override_image_downsize', false, compact( 'image', 'attachment_id', 'size' ) ) ) {
651	return $image;
652	}
653
654	// Get the image URL and proceed with Photon-ification if successful
655	$image_url = wp_get_attachment_url( $attachment_id );
656
657	// Set this to true later when we know we have size meta.
658	$has_size_meta = false;
659
660	if ( $image_url ) {
661	// Check if image URL should be used with Photon
662	if ( ! self::validate_image_url( $image_url ) ) {
663	return $image;
664	}
665
666	$intermediate = true; // For the fourth array item returned by the image_downsize filter.
667
668	// If an image is requested with a size known to WordPress, use that size's settings with Photon.
669	// WP states that `add_image_size()` should use a string for the name, but doesn't enforce that.
670	// Due to differences in how Core and Photon check for the registered image size, we check both types.
671	if ( ( is_string( $size ) \|\| is_int( $size ) ) && array_key_exists( $size, self::image_sizes() ) ) {
672	$image_args = self::image_sizes();
673	$image_args = $image_args[ $size ];
674
675	$photon_args = array();
676
677	$image_meta = image_get_intermediate_size( $attachment_id, $size );
678
679	// 'full' is a special case: We need consistent data regardless of the requested size.
680	if ( 'full' == $size ) {
681	$image_meta = wp_get_attachment_metadata( $attachment_id );
682	$intermediate = false;
683	} elseif ( ! $image_meta ) {
684	// If we still don't have any image meta at this point, it's probably from a custom thumbnail size
685	// for an image that was uploaded before the custom image was added to the theme. Try to determine the size manually.
686	$image_meta = wp_get_attachment_metadata( $attachment_id );
687
688	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
689	$image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $image_args['width'], $image_args['height'], $image_args['crop'] );
690	if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image.
691	$image_meta['width'] = $image_resized[6];
692	$image_meta['height'] = $image_resized[7];
693	}
694	}
695	}
696
697	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
698	$image_args['width'] = $image_meta['width'];
699	$image_args['height'] = $image_meta['height'];
700
701	list( $image_args['width'], $image_args['height'] ) = image_constrain_size_for_editor( $image_args['width'], $image_args['height'], $size, 'display' );
702	$has_size_meta = true;
703	}
704
705	// Expose determined arguments to a filter before passing to Photon
706	$transform = $image_args['crop'] ? 'resize' : 'fit';
707
708	// Check specified image dimensions and account for possible zero values; photon fails to resize if a dimension is zero.
709	if ( 0 == $image_args['width'] \|\| 0 == $image_args['height'] ) {
710	if ( 0 == $image_args['width'] && 0 < $image_args['height'] ) {
711	$photon_args['h'] = $image_args['height'];
712	} elseif ( 0 == $image_args['height'] && 0 < $image_args['width'] ) {
713	$photon_args['w'] = $image_args['width'];
714	}
715	} else {
716	if ( ( 'resize' === $transform ) && $image_meta = wp_get_attachment_metadata( $attachment_id ) ) {
717	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
718	// Lets make sure that we don't upscale images since wp never upscales them as well
719	$smaller_width = ( ( $image_meta['width'] < $image_args['width'] ) ? $image_meta['width'] : $image_args['width'] );
720	$smaller_height = ( ( $image_meta['height'] < $image_args['height'] ) ? $image_meta['height'] : $image_args['height'] );
721
722	$photon_args[ $transform ] = $smaller_width . ',' . $smaller_height;
723	}
724	} else {
725	$photon_args[ $transform ] = $image_args['width'] . ',' . $image_args['height'];
726	}
727
728	}
729
730
731	/**
732	* Filter the Photon Arguments added to an image when going through Photon, when that image size is a string.
733	* Image size will be a string (e.g. "full", "medium") when it is known to WordPress.
734	*
735	* @module photon
736	*
737	* @since 2.0.0
738	*
739	* @param array $photon_args Array of Photon arguments.
740	* @param array $args {
741	* Array of image details.
742	*
743	* @type $image_args Array of Image arguments (width, height, crop).
744	* @type $image_url Image URL.
745	* @type $attachment_id Attachment ID of the image.
746	* @type $size Image size. Can be a string (name of the image size, e.g. full) or an integer.
747	* @type $transform Value can be resize or fit.
748	* @see https://developer.wordpress.com/docs/photon/api
749	* }
750	*/
751	$photon_args = apply_filters( 'jetpack_photon_image_downsize_string', $photon_args, compact( 'image_args', 'image_url', 'attachment_id', 'size', 'transform' ) );
752
753	// Generate Photon URL
754	$image = array(
755	jetpack_photon_url( $image_url, $photon_args ),
756	$has_size_meta ? $image_args['width'] : false,
757	$has_size_meta ? $image_args['height'] : false,
758	$intermediate
759	);
760	} elseif ( is_array( $size ) ) {
761	// Pull width and height values from the provided array, if possible
762	$width = isset( $size[0] ) ? (int) $size[0] : false;
763	$height = isset( $size[1] ) ? (int) $size[1] : false;
764
765	// Don't bother if necessary parameters aren't passed.
766	if ( ! $width \|\| ! $height ) {
767	return $image;
768	}
769
770	$image_meta = wp_get_attachment_metadata( $attachment_id );
771	if ( isset( $image_meta['width'], $image_meta['height'] ) ) {
772	$image_resized = image_resize_dimensions( $image_meta['width'], $image_meta['height'], $width, $height );
773
774	if ( $image_resized ) { // This could be false when the requested image size is larger than the full-size image.
775	$width = $image_resized[6];
776	$height = $image_resized[7];
777	} else {
778	$width = $image_meta['width'];
779	$height = $image_meta['height'];
780	}
781
782	$has_size_meta = true;
783	}
784
785	list( $width, $height ) = image_constrain_size_for_editor( $width, $height, $size );
786
787	// Expose arguments to a filter before passing to Photon
788	$photon_args = array(
789	'fit' => $width . ',' . $height
790	);
791
792	/**
793	* Filter the Photon Arguments added to an image when going through Photon,
794	* when the image size is an array of height and width values.
795	*
796	* @module photon
797	*
798	* @since 2.0.0
799	*
800	* @param array $photon_args Array of Photon arguments.
801	* @param array $args {
802	* Array of image details.
803	*
804	* @type $width Image width.
805	* @type height Image height.
806	* @type $image_url Image URL.
807	* @type $attachment_id Attachment ID of the image.
808	* }
809	*/
810	$photon_args = apply_filters( 'jetpack_photon_image_downsize_array', $photon_args, compact( 'width', 'height', 'image_url', 'attachment_id' ) );
811
812	// Generate Photon URL
813	$image = array(
814	jetpack_photon_url( $image_url, $photon_args ),
815	$has_size_meta ? $width : false,
816	$has_size_meta ? $height : false,
817	$intermediate
818	);
819	}
820	}
821
822	return $image;
823	}
824
825	/**
826	* Filters an array of image `srcset` values, replacing each URL with its Photon equivalent.
827	*
828	* @since 3.8.0
829	* @since 4.0.4 Added automatically additional sizes beyond declared image sizes.
830	* @param array $sources An array of image urls and widths.
831	* @uses self::validate_image_url, jetpack_photon_url, Jetpack_Photon::parse_from_filename
832	* @uses Jetpack_Photon::strip_image_dimensions_maybe, Jetpack::get_content_width
833	* @return array An array of Photon image urls and widths.
834	*/
835	public function filter_srcset_array( $sources = array(), $size_array = array(), $image_src = array(), $image_meta = array(), $attachment_id = 0 ) {
836	if ( ! is_array( $sources ) ) {
837	return $sources;
838	}
839	$upload_dir = wp_get_upload_dir();
840
841	foreach ( $sources as $i => $source ) {
842	if ( ! self::validate_image_url( $source['url'] ) ) {
843	continue;
844	}
845
846	/** This filter is already documented in class.photon.php */
847	if ( apply_filters( 'jetpack_photon_skip_image', false, $source['url'], $source ) ) {
848	continue;
849	}
850
851	$url = $source['url'];
852	list( $width, $height ) = Jetpack_Photon::parse_dimensions_from_filename( $url );
853
854	// It's quicker to get the full size with the data we have already, if available
855	if ( ! empty( $attachment_id ) ) {
856	$url = wp_get_attachment_url( $attachment_id );
857	} else {
858	$url = Jetpack_Photon::strip_image_dimensions_maybe( $url );
859	}
860
861	$args = array();
862	if ( 'w' === $source['descriptor'] ) {
863	if ( $height && ( $source['value'] == $width ) ) {
864	$args['resize'] = $width . ',' . $height;
865	} else {
866	$args['w'] = $source['value'];
867	}
868
869	}
870
871	$sources[ $i ]['url'] = jetpack_photon_url( $url, $args );
872	}
873
874	/**
875	* At this point, $sources is the original srcset with Photonized URLs.
876	* Now, we're going to construct additional sizes based on multiples of the content_width.
877	* This will reduce the gap between the largest defined size and the original image.
878	*/
879
880	/**
881	* Filter the multiplier Photon uses to create new srcset items.
882	* Return false to short-circuit and bypass auto-generation.
883	*
884	* @module photon
885	*
886	* @since 4.0.4
887	*
888	* @param array\|bool $multipliers Array of multipliers to use or false to bypass.
889	*/
890	$multipliers = apply_filters( 'jetpack_photon_srcset_multipliers', array( 2, 3 ) );
891	$url = trailingslashit( $upload_dir['baseurl'] ) . $image_meta['file'];
892
893	if (
894	/** Short-circuit via jetpack_photon_srcset_multipliers filter. */
895	is_array( $multipliers )
896	/** This filter is already documented in class.photon.php */
897	&& ! apply_filters( 'jetpack_photon_skip_image', false, $url, null )
898	/** Verify basic meta is intact. */
899	&& isset( $image_meta['width'] ) && isset( $image_meta['height'] ) && isset( $image_meta['file'] )
900	/** Verify we have the requested width/height. */
901	&& isset( $size_array[0] ) && isset( $size_array[1] )
902	) {
903
904	$fullwidth = $image_meta['width'];
905	$fullheight = $image_meta['height'];
906	$reqwidth = $size_array[0];
907	$reqheight = $size_array[1];
908
909	$constrained_size = wp_constrain_dimensions( $fullwidth, $fullheight, $reqwidth );
910	$expected_size = array( $reqwidth, $reqheight );
911
912	if ( abs( $constrained_size[0] - $expected_size[0] ) <= 1 && abs( $constrained_size[1] - $expected_size[1] ) <= 1 ) {
913	$crop = 'soft';
914	$base = Jetpack::get_content_width() ? Jetpack::get_content_width() : 1000; // Provide a default width if none set by the theme.
915	} else {
916	$crop = 'hard';
917	$base = $reqwidth;
918	}
919
920
921	$currentwidths = array_keys( $sources );
922	$newsources = null;
923
924	foreach ( $multipliers as $multiplier ) {
925
926	$newwidth = $base * $multiplier;
927	foreach ( $currentwidths as $currentwidth ){
928	// If a new width would be within 100 pixes of an existing one or larger than the full size image, skip.
929	if ( abs( $currentwidth - $newwidth ) < 50 \|\| ( $newwidth > $fullwidth ) ) {
930	continue 2; // Back to the foreach ( $multipliers as $multiplier )
931	}
932	} // foreach ( $currentwidths as $currentwidth ){
933
934	if ( 'soft' == $crop ) {
935	$args = array(
936	'w' => $newwidth,
937	);
938	} else { // hard crop, e.g. add_image_size( 'example', 200, 200, true );
939	$args = array(
940	'zoom' => $multiplier,
941	'resize' => $reqwidth . ',' . $reqheight,
942	);
943	}
944
945	$newsources[ $newwidth ] = array(
946	'url' => jetpack_photon_url( $url, $args ),
947	'descriptor' => 'w',
948	'value' => $newwidth,
949	);
950	} // foreach ( $multipliers as $multiplier )
951	if ( is_array( $newsources ) ) {
952	if ( function_exists( 'array_replace' ) ) { // PHP 5.3+, preferred
953	// phpcs:disable
954	$sources = array_replace( $sources, $newsources );
955	// phpcs:enable
956	} else { // For PHP 5.2 using WP shim function
957	$sources = array_replace_recursive( $sources, $newsources );
958	}
959	}
960	} // if ( isset( $image_meta['width'] ) && isset( $image_meta['file'] ) )
961
962	return $sources;
963	}
964
965	/**
966	* Filters an array of image `sizes` values, using $content_width instead of image's full size.
967	*
968	* @since 4.0.4
969	* @since 4.1.0 Returns early for images not within the_content.
970	* @param array $sizes An array of media query breakpoints.
971	* @param array $size Width and height of the image
972	* @uses Jetpack::get_content_width
973	* @return array An array of media query breakpoints.
974	*/
975	public function filter_sizes( $sizes, $size ) {
976	if ( ! doing_filter( 'the_content' ) ){
977	return $sizes;
978	}
979	$content_width = Jetpack::get_content_width();
980	if ( ! $content_width ) {
981	$content_width = 1000;
982	}
983
984	if ( ( is_array( $size ) && $size[0] < $content_width ) ) {
985	return $sizes;
986	}
987
988	return sprintf( '(max-width: %1$dpx) 100vw, %1$dpx', $content_width );
989	}
990
991	/**
992	** GENERAL FUNCTIONS
993	**/
994
995	/**
996	* Ensure image URL is valid for Photon.
997	* 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.
998	*
999	* @param string $url
1000	* @uses wp_parse_args
1001	* @return bool
1002	*/
1003	protected static function validate_image_url( $url ) {
1004	$parsed_url = @parse_url( $url );
1005
1006	if ( ! $parsed_url )
1007	return false;
1008
1009	// Parse URL and ensure needed keys exist, since the array returned by `parse_url` only includes the URL components it finds.
1010	$url_info = wp_parse_args( $parsed_url, array(
1011	'scheme' => null,
1012	'host' => null,
1013	'port' => null,
1014	'path' => null
1015	) );
1016
1017	// Bail if scheme isn't http or port is set that isn't port 80
1018	if (
1019	( 'http' != $url_info['scheme'] \|\| ! in_array( $url_info['port'], array( 80, null ) ) ) &&
1020	/**
1021	* Allow Photon to fetch images that are served via HTTPS.
1022	*
1023	* @module photon
1024	*
1025	* @since 2.4.0
1026	* @since 3.9.0 Default to false.
1027	*
1028	* @param bool $reject_https Should Photon ignore images using the HTTPS scheme. Default to false.
1029	*/
1030	apply_filters( 'jetpack_photon_reject_https', false )
1031	) {
1032	return false;
1033	}
1034
1035	// Bail if no host is found
1036	if ( is_null( $url_info['host'] ) )
1037	return false;
1038
1039	// Bail if the image alredy went through Photon
1040	if ( preg_match( '#^i[\d]{1}.wp.com$#i', $url_info['host'] ) )
1041	return false;
1042
1043	// Bail if no path is found
1044	if ( is_null( $url_info['path'] ) )
1045	return false;
1046
1047	// Ensure image extension is acceptable
1048	if ( ! in_array( strtolower( pathinfo( $url_info['path'], PATHINFO_EXTENSION ) ), self::$extensions ) )
1049	return false;
1050
1051	// If we got this far, we should have an acceptable image URL
1052	// But let folks filter to decline if they prefer.
1053	/**
1054	* Overwrite the results of the validation steps an image goes through before to be considered valid to be used by Photon.
1055	*
1056	* @module photon
1057	*
1058	* @since 3.0.0
1059	*
1060	* @param bool true Is the image URL valid and can it be used by Photon. Default to true.
1061	* @param string $url Image URL.
1062	* @param array $parsed_url Array of information about the image.
1063	*/
1064	return apply_filters( 'photon_validate_image_url', true, $url, $parsed_url );
1065	}
1066
1067	/**
1068	* Checks if the file exists before it passes the file to photon
1069	*
1070	* @param string $src The image URL
1071	* @return string
1072	**/
1073	public static function strip_image_dimensions_maybe( $src ){
1074	$stripped_src = $src;
1075
1076	// Build URL, first removing WP's resized string so we pass the original image to Photon
1077	if ( preg_match( '#(-\d+x\d+)\.(' . implode('\|', self::$extensions ) . '){1}$#i', $src, $src_parts ) ) {
1078	$stripped_src = str_replace( $src_parts[1], '', $src );
1079	$upload_dir = wp_get_upload_dir();
1080
1081	// Extracts the file path to the image minus the base url
1082	$file_path = substr( $stripped_src, strlen ( $upload_dir['baseurl'] ) );
1083
1084	if( file_exists( $upload_dir["basedir"] . $file_path ) )
1085	$src = $stripped_src;
1086	}
1087
1088	return $src;
1089	}
1090
1091	/**
1092	* Provide an array of available image sizes and corresponding dimensions.
1093	* Similar to get_intermediate_image_sizes() except that it includes image sizes' dimensions, not just their names.
1094	*
1095	* @global $wp_additional_image_sizes
1096	* @uses get_option
1097	* @return array
1098	*/
1099	protected static function image_sizes() {
1100	if ( null == self::$image_sizes ) {
1101	global $_wp_additional_image_sizes;
1102
1103	// Populate an array matching the data structure of $_wp_additional_image_sizes so we have a consistent structure for image sizes
1104	$images = array(
1105	'thumb' => array(
1106	'width' => intval( get_option( 'thumbnail_size_w' ) ),
1107	'height' => intval( get_option( 'thumbnail_size_h' ) ),
1108	'crop' => (bool) get_option( 'thumbnail_crop' )
1109	),
1110	'medium' => array(
1111	'width' => intval( get_option( 'medium_size_w' ) ),
1112	'height' => intval( get_option( 'medium_size_h' ) ),
1113	'crop' => false
1114	),
1115	'large' => array(
1116	'width' => intval( get_option( 'large_size_w' ) ),
1117	'height' => intval( get_option( 'large_size_h' ) ),
1118	'crop' => false
1119	),
1120	'full' => array(
1121	'width' => null,
1122	'height' => null,
1123	'crop' => false
1124	)
1125	);
1126
1127	// Compatibility mapping as found in wp-includes/media.php
1128	$images['thumbnail'] = $images['thumb'];
1129
1130	// Update class variable, merging in $_wp_additional_image_sizes if any are set
1131	if ( is_array( $_wp_additional_image_sizes ) && ! empty( $_wp_additional_image_sizes ) )
1132	self::$image_sizes = array_merge( $images, $_wp_additional_image_sizes );
1133	else
1134	self::$image_sizes = $images;
1135	}
1136
1137	return is_array( self::$image_sizes ) ? self::$image_sizes : array();
1138	}
1139
1140	/**
1141	* Pass og:image URLs through Photon
1142	*
1143	* @param array $tags
1144	* @param array $parameters
1145	* @uses jetpack_photon_url
1146	* @return array
1147	*/
1148	function filter_open_graph_tags( $tags, $parameters ) {
1149	if ( empty( $tags['og:image'] ) ) {
1150	return $tags;
1151	}
1152
1153	$photon_args = array(
1154	'fit' => sprintf( '%d,%d', 2 * $parameters['image_width'], 2 * $parameters['image_height'] ),
1155	);
1156
1157	if ( is_array( $tags['og:image'] ) ) {
1158	$images = array();
1159	foreach ( $tags['og:image'] as $image ) {
1160	$images[] = jetpack_photon_url( $image, $photon_args );
1161	}
1162	$tags['og:image'] = $images;
1163	} else {
1164	$tags['og:image'] = jetpack_photon_url( $tags['og:image'], $photon_args );
1165	}
1166
1167	return $tags;
1168	}
1169
1170	public function noresize_intermediate_sizes( $sizes ) {
1171	return __return_empty_array();
1172	}
1173
1174	/**
1175	* Enqueue Photon helper script
1176	*
1177	* @uses wp_enqueue_script, plugins_url
1178	* @action wp_enqueue_script
1179	* @return null
1180	*/
1181	public function action_wp_enqueue_scripts() {
1182	if ( Jetpack_AMP_Support::is_amp_request() ) {
1183	return;
1184	}
1185	wp_enqueue_script(
1186	'jetpack-photon',
1187	Jetpack::get_file_url_for_environment(
1188	'_inc/build/photon/photon.min.js',
1189	'modules/photon/photon.js'
1190	),
1191	array( 'jquery' ),
1192	20130122,
1193	true
1194	);
1195	}
1196
1197	/**
1198	* Determine if image_downsize should utilize Photon via REST API.
1199	*
1200	* The WordPress Block Editor (Gutenberg) and other REST API consumers using the wp/v2/media endpoint, especially in the "edit"
1201	* context is more akin to the is_admin usage of Photon (see filter_image_downsize). Since consumers are trying to edit content in posts,
1202	* Photon should not fire as it will fire later on display. By aborting an attempt to Photonize an image here, we
1203	* prevents issues like https://github.com/Automattic/jetpack/issues/10580 .
1204	*
1205	* To determine if we're using the wp/v2/media endpoint, we hook onto the `rest_request_before_callbacks` filter and
1206	* if determined we are using it in the edit context, we'll false out the `jetpack_photon_override_image_downsize` filter.
1207	*
1208	* @see Jetpack_Photon::filter_image_downsize()
1209	*
1210	* @param null\|WP_Error $response
1211	* @param array $endpoint_data
1212	* @param WP_REST_Request $request Request used to generate the response.
1213	*
1214	* @return null\|WP_Error The original response object without modification.
1215	*/
1216	public function should_rest_photon_image_downsize( $response, $endpoint_data, $request ) {
1217	if ( ! is_a( $request , 'WP_REST_Request' ) ) {
1218	return $response; // Something odd is happening. Do nothing and return the response.
1219	}
1220
1221	if ( is_wp_error( $response ) ) {
1222	// If we're going to return an error, we don't need to do anything with Photon.
1223	return $response;
1224	}
1225
1226	$route = $request->get_route();
1227
1228	if ( false !== strpos( $route, 'wp/v2/media' ) && 'edit' === $request['context'] ) {
1229	// Don't use `__return_true()`: Use something unique. See ::_override_image_downsize_in_rest_edit_context()
1230	// Late execution to avoid conflict with other plugins as we really don't want to run in this situation.
1231	add_filter( 'jetpack_photon_override_image_downsize', array( $this, '_override_image_downsize_in_rest_edit_context' ), 999999 );
1232	}
1233
1234	return $response;
1235
1236	}
1237
1238	/**
1239	* Remove the override we may have added in ::should_rest_photon_image_downsize()
1240	* Since ::_override_image_downsize_in_rest_edit_context() is only
1241	* every used here, we can always remove it without ever worrying
1242	* about breaking any other configuration.
1243	*
1244	* @param mixed $response
1245	* @return mixed Unchanged $response
1246	*/
1247	public function cleanup_rest_photon_image_downsize( $response ) {
1248	remove_filter( 'jetpack_photon_override_image_downsize', array( $this, '_override_image_downsize_in_rest_edit_context' ), 999999 );
1249	return $response;
1250	}
1251
1252	/**
1253	* Used internally by ::should_rest_photon_image_downsize() to not photonize
1254	* image URLs in ?context=edit REST requests.
1255	* MUST NOT be used anywhere else.
1256	* We use a unique function instead of __return_true so that we can clean up
1257	* after ourselves without breaking anyone else's filters.
1258	*
1259	* @internal
1260	* @return true
1261	*/
1262	public function _override_image_downsize_in_rest_edit_context() {
1263	return true;
1264	}
1265	}
1266