class-frontend.php — Responsive Lightbox & Gallery 2.7.2

responsive-lightbox / includes / class-frontend.php

responsive-lightbox / includes Last commit date

class-frontend.php

2823 lines

1	<?php
2	// exit if accessed directly
3	if ( ! defined( 'ABSPATH' ) )
4	exit;
5
6	new Responsive_Lightbox_Frontend();
7
8	/**
9	* Responsive Lightbox frontend class.
10	*
11	* @class Responsive_Lightbox_Frontend
12	*/
13	class Responsive_Lightbox_Frontend {
14
15	public $gallery_no = 0;
16
17	private $script_data = [
18	'gallery' => '',
19	'basicgrid' => '',
20	'basicslider' => '',
21	'basicmasonry' => ''
22	];
23	private $style_data = [
24	'gallery' => '',
25	'basicgrid' => '',
26	'basicslider' => '',
27	'basicmasonry' => ''
28	];
29
30	/**
31	* Class constructor.
32	*
33	* @return void
34	*/
35	public function __construct() {
36	// set instance
37	Responsive_Lightbox()->frontend = $this;
38
39	// actions
40	add_action( 'wp_enqueue_scripts', [ $this, 'wp_enqueue_scripts' ] );
41	add_action( 'wp_enqueue_scripts', [ $this, 'wp_dequeue_scripts' ], 100 );
42	add_action( 'rl_before_gallery', [ $this, 'before_gallery' ], 10, 2 );
43	add_action( 'rl_after_gallery', [ $this, 'after_gallery' ], 10, 2 );
44
45	// filters
46	add_filter( 'rl_gallery_container_class', [ $this, 'gallery_container_class' ], 10, 3 );
47	add_filter( 'the_content', [ $this, 'gallery_preview' ] );
48	add_filter( 'the_content', [ $this, 'add_lightbox' ], 11 );
49	add_filter( 'wp_get_attachment_link', [ $this, 'wp_get_attachment_link' ], 1000, 2 );
50	add_filter( 'get_comment_text', [ $this, 'get_comment_text' ] );
51	add_filter( 'dynamic_sidebar_params', [ $this, 'dynamic_sidebar_params' ] );
52	add_filter( 'rl_widget_output', [ $this, 'widget_output' ], 10, 3 );
53	add_filter( 'post_gallery', [ $this, 'gallery_attributes' ], 1000, 2 );
54	add_filter( 'post_gallery', [ $this, 'basic_grid_gallery_shortcode' ], 1001, 2 );
55	add_filter( 'post_gallery', [ $this, 'basic_slider_gallery_shortcode' ], 1001, 2 );
56	add_filter( 'post_gallery', [ $this, 'basic_masonry_gallery_shortcode' ], 1001, 2 );
57	add_filter( 'post_gallery', [ $this, 'force_custom_gallery_lightbox' ], 2000 );
58
59	// visual composer
60	add_filter( 'vc_shortcode_content_filter_after', [ $this, 'vc_shortcode_content_filter_after' ], 10, 2 );
61
62	// woocommerce
63	add_filter( 'woocommerce_single_product_image_html', [ $this, 'woocommerce_single_product_image_html' ], 100 );
64	add_filter( 'woocommerce_single_product_image_thumbnail_html', [ $this, 'woocommerce_single_product_image_thumbnail_html' ], 100, 2 );
65	}
66
67	/**
68	* Get class data.
69	*
70	* @param string $attr
71	* @return mixed
72	*/
73	public function get_data( $attr ) {
74	return property_exists( $this, $attr ) ? $this->{$attr} : null;
75	}
76
77	/**
78	* Add lightbox to images, galleries and videos.
79	*
80	* @param string $content HTML content
81	* @return string
82	*/
83	public function add_lightbox( $content ) {
84	// get main instance
85	$rl = Responsive_Lightbox();
86
87	// get current script
88	$script = $rl->get_data( 'current_script' );
89
90	// get scripts
91	$scripts = $rl->settings->get_data( 'scripts' );
92
93	// prepare arguments
94	$args = [
95	'selector' => $rl->options['settings']['selector'],
96	'script' => $script,
97	'settings' => [
98	'script' => $rl->options['configuration'][$script],
99	'plugin' => $rl->options['settings']
100	],
101	'supports' => isset( $scripts[$script]['supports'] ) ? $scripts[$script]['supports'] : []
102	];
103
104	// workaround for builder galleries to bypass images_as_gallery option, applied only to rl_gallery posts
105	if ( is_singular( 'rl_gallery' ) )
106	$args['settings']['plugin']['images_as_gallery'] = true;
107
108	// search for links containing data-rl_content attribute
109	preg_match_all( '/<a[^>]?\bdata-rl_content=(["\'])(.?)\1[^>]*?>/i', $content, $links );
110
111	// found any links?
112	if ( ! empty ( $links[0] ) ) {
113	foreach ( $links[0] as $link_number => $link ) {
114	// set content type
115	$args['content'] = $links[2][$link_number];
116
117	// set link number
118	$args['link_number'] = $link_number;
119
120	// update link
121	$content = str_replace( $link, $this->lightbox_content_link( $link, $args ), $content );
122	}
123	}
124
125	// images
126	if ( $args['settings']['plugin']['image_links'] \|\| $args['settings']['plugin']['images_as_gallery'] \|\| $args['settings']['plugin']['force_custom_gallery'] ) {
127	// search for image links
128	preg_match_all( '/<a([^>]?)\bhref=(["\'])([^"\']?)\.(bmp\|gif\|jpeg\|jpg\|png\|webp)\2(.?)>(.?)<\/a>/is', $content, $links );
129
130	// found any links?
131	if ( ! empty ( $links[0] ) ) {
132	// generate hash for single images gallery
133	if ( $args['settings']['plugin']['images_as_gallery'] )
134	$args['rel_hash'] = '-gallery-' . $this->generate_hash();
135	else
136	$args['rel_hash'] = '';
137
138	foreach ( $links[0] as $link_number => $link ) {
139	// get attachment id
140	$args['image_id'] = $this->get_attachment_id_by_url( $links[3][$link_number] . '.' . $links[4][$link_number] );
141
142	// set link number
143	$args['link_number'] = $link_number;
144
145	// link parts
146	$args['link_parts'] = [ $links[1][$link_number], $links[3][$link_number], $links[4][$link_number], $links[5][$link_number], $links[6][$link_number] ];
147
148	// get title type
149	$title_arg = $args['settings']['plugin']['force_custom_gallery'] ? $args['settings']['plugin']['gallery_image_title'] : $args['settings']['plugin']['image_title'];
150
151	// update title if needed
152	if ( $title_arg !== 'default' && $args['image_id'] )
153	$args['title'] = $this->get_attachment_title( $args['image_id'], apply_filters( 'rl_lightbox_attachment_image_title_arg', $title_arg, $args['image_id'], $links[3][$link_number] . '.' . $links[4][$link_number] ) );
154	else
155	$args['title'] = '';
156
157	// get caption type
158	$caption_arg = $args['settings']['plugin']['force_custom_gallery'] ? $args['settings']['plugin']['gallery_image_caption'] : $args['settings']['plugin']['image_caption'];
159
160	// update caption if needed
161	if ( $caption_arg !== 'default' && $args['image_id'] )
162	$args['caption'] = $this->get_attachment_title( $args['image_id'], apply_filters( 'rl_lightbox_attachment_image_title_arg', $caption_arg, $args['image_id'], $links[3][$link_number] . '.' . $links[4][$link_number] ) );
163	else
164	$args['caption'] = '';
165
166	// rl gallery link?
167	if ( preg_match( '/class="(?:.?)rl-gallery-link[^"]?"/i', $links[1][$link_number] ) === 1 \|\| preg_match( '/class="(?:.?)rl-gallery-link[^"]?"/i', $links[5][$link_number] ) === 1 ) {
168	// update link allowing only filter to run, bypass default changes
169	$content = str_replace( $link, $this->lightbox_image_link( $link, $args, true ), $content );
170	} else {
171	// update link
172	$content = str_replace( $link, $this->lightbox_image_link( $link, $args ), $content );
173	}
174	}
175	}
176	}
177
178	// videos
179	if ( $args['settings']['plugin']['videos'] && rl_current_lightbox_supports( 'video' ) ) {
180	// search for video links
181	preg_match_all('/<a([^>]?)\bhref=(["\'])((http\|https)(?::\/\/\|)(?:(?:(?:youtu\.be\/\|(?:www\.)?youtube\.com\/)(?:embed\/\|v\/\|watch\?v=)?([\w-]{11})(?:\?)?([a-z0-9;:@#&%=+\/\$_.-]))\|(?:(?:www\.)?vimeo\.com\/([0-9]+)(?:\?)?([a-z0-9;:@#&%=+\/\$_.-]))))\2(.?)>(.*?)<\/a>/i', $content, $links );
182
183	// set empty video arguments
184	$args['video_id'] = $args['video_type'] = $args['video_query'] = $args['video_protocol'] = '';
185
186	// found any links?
187	if ( ! empty ( $links[0] ) ) {
188	foreach ( $links[0] as $link_number => $link ) {
189	// youtube?
190	if ( $links[5][$link_number] !== '' ) {
191	$args['video_id'] = $links[5][$link_number];
192	$args['video_type'] = 'youtube';
193	$args['video_query'] = $links[6][$link_number];
194	// vimeo?
195	} elseif ( $links[7][$link_number] !== '' ) {
196	$args['video_id'] = $links[7][$link_number];
197	$args['video_type'] = 'vimeo';
198	$args['video_query'] = $links[8][$link_number];
199	}
200
201	// set video protocol
202	$args['video_protocol'] = $links[4][$link_number];
203
204	// set link number
205	$args['link_number'] = $link_number;
206
207	// link parts
208	$args['link_parts'] = [ $links[1][$link_number], $links[3][$link_number], $links[9][$link_number], $links[10][$link_number] ];
209
210	// rl gallery link?
211	if ( preg_match( '/class="(?:.?)rl-gallery-link[^"]?"/i', $links[1][$link_number] ) === 1 \|\| preg_match( '/class="(?:.?)rl-gallery-link[^"]?"/i', $links[9][$link_number] ) === 1 ) {
212	// update link allowing only filter to run, bypass default changes
213	$content = str_replace( $link, $this->lightbox_video_link( $link, $args, true ), $content );
214	} else {
215	// update link
216	$content = str_replace( $link, $this->lightbox_video_link( $link, $args ), $content );
217	}
218	}
219	}
220	}
221
222	return $content;
223	}
224
225	/**
226	* Add lightbox to video links.
227	*
228	* @param string $link Video link
229	* @param array $args Link arguments
230	* @param bool $only_filter Whether function should run only filter
231	* @return string
232	*/
233	public function lightbox_video_link( $link, $args, $only_filter = false ) {
234	if ( ! $only_filter ) {
235	// link already contains data-rel attribute?
236	if ( preg_match( '/<a[^>]?\bdata-rel=(["\'])(.?)\1[^>]*?>/is', $link, $result ) === 1 ) {
237	// allow to modify link?
238	if ( $result[2] !== 'norl' ) {
239	// swipebox video fix
240	if ( $args['script'] === 'swipebox' && $args['video_type'] === 'vimeo' )
241	$link = str_replace( $args['link_parts'][1], add_query_arg( 'width', $args['settings']['script']['video_max_width'], $args['link_parts'][1] ), $link );
242
243	// replace data-rel
244	$link = preg_replace( '/\bdata-rel=(["\'])(.*?)\1/s', 'data-rel="' . esc_attr( $args['selector'] ) . '-video-' . (int) $args['link_number'] . '"', $link, 1 );
245
246	if ( $args['script'] === 'magnific' )
247	$link = preg_replace( '/(<a.*?)>/is', '$1 data-magnific_type="video">', $link );
248	}
249	} else {
250	// swipebox video fix
251	if ( $args['script'] === 'swipebox' && $args['video_type'] === 'vimeo' )
252	$args['link_parts'][1] = add_query_arg( 'width', $args['settings']['script']['video_max_width'], $args['link_parts'][1] );
253
254	// add data-rel
255	$link = '<a' . $args['link_parts'][0] . 'href="' . $args['link_parts'][1] . '" data-rel="' . esc_attr( $args['selector'] ) . '-video-' . (int) $args['link_number'] . '"' . $args['link_parts'][2] . '>' . $args['link_parts'][3] . '</a>';
256
257	if ( $args['script'] === 'magnific' )
258	$link = preg_replace( '/(<a.*?)>/is', '$1 data-magnific_type="video">', $link );
259	}
260	}
261
262	return apply_filters( 'rl_lightbox_video_link', $link, $args );
263	}
264
265	/**
266	* Add lightbox to image links.
267	*
268	* @param string $link Image link
269	* @param array $args Link arguments
270	* @param bool $only_filter Whether function should run only filter
271	* @return string
272	*/
273	public function lightbox_image_link( $link, $args, $only_filter = false ) {
274	if ( ! $only_filter ) {
275	if ( isset( $_GET['rl_gallery_no'], $_GET['rl_page'] ) )
276	$this->gallery_no = (int) $_GET['rl_gallery_no'];
277
278	// link already contains data-rel attribute?
279	if ( preg_match( '/<a[^>]?\bdata-rel=(["\'])(.?)\1[^>]*?>/is', $link, $result ) === 1 ) {
280	// allow to modify link?
281	if ( $result[2] !== 'norl' ) {
282	// gallery?
283	if ( $args['settings']['plugin']['images_as_gallery'] \|\| $args['settings']['plugin']['force_custom_gallery'] )
284	$link = preg_replace( '/\bdata-rel=(["\'])(.*?)\1/s', 'data-rel="' . esc_attr( $args['selector'] ) . '-gallery-' . esc_attr( base64_encode( sanitize_text_field( $result[2] ) ) ) . '" data-rl_title="__RL_IMAGE_TITLE__" data-rl_caption="__RL_IMAGE_CAPTION__"' . ( $args['script'] === 'magnific' ? ' data-magnific_type="gallery"' : '' ) . ( $args['script'] === 'imagelightbox' ? ' data-imagelightbox="' . (int) $args['link_number'] . '"' : '' ), $link, 1 );
285	// single image
286	else
287	$link = preg_replace( '/\bdata-rel=(["\'])(.*?)\1/s', 'data-rel="' . esc_attr( $args['selector'] ) . '-image-' . esc_attr( base64_encode( sanitize_text_field( $result[2] ) ) ) . '"' . ( $args['script'] === 'magnific' ? ' data-magnific_type="image"' : '' ) . ( $args['script'] === 'imagelightbox' ? ' data-imagelightbox="' . (int) $args['link_number'] . '"' : '' ) . ' data-rl_title="__RL_IMAGE_TITLE__" data-rl_caption="__RL_IMAGE_CAPTION__"', $link, 1 );
288	}
289	// link without data-rel
290	} else {
291	// force images?
292	if ( $args['settings']['plugin']['force_custom_gallery'] ) {
293	// link already contains rel attribute?
294	if ( preg_match( '/<a[^>]?\brel=(["\'])(.?)\1[^>]*?>/is', $link, $result ) === 1 ) {
295	// allow to modify link?
296	if ( $result[2] !== 'norl' )
297	$link = preg_replace( '/\brel=(["\'])(.*?)\1/s', 'data-rel="' . esc_attr( $args['selector'] ) . '-gallery-' . (int) $this->gallery_no . '" data-rl_title="__RL_IMAGE_TITLE__" data-rl_caption="__RL_IMAGE_CAPTION__"' . ( $args['script'] === 'magnific' ? ' data-magnific_type="gallery"' : '' ) . ( $args['script'] === 'imagelightbox' ? ' data-imagelightbox="' . (int) $args['link_number'] . '"' : '' ), $link, 1 );
298	} else
299	$link = '<a' . $args['link_parts'][0] . ' href="' . $args['link_parts'][1] . '.' . $args['link_parts'][2] . '" data-rel="' . esc_attr( $args['selector'] ) . '-gallery-' . (int) $this->gallery_no . '" data-rl_title="__RL_IMAGE_TITLE__" data-rl_caption="__RL_IMAGE_CAPTION__"' . ( $args['script'] === 'magnific' ? ' data-magnific_type="gallery"' : '' ) . ( $args['script'] === 'imagelightbox' ? ' data-imagelightbox="' . (int) $args['link_number'] . '"' : '' ) . $args['link_parts'][3] . '>' . $args['link_parts'][4] . '</a>';
300	} else
301	$link = '<a' . $args['link_parts'][0] . 'href="' . $args['link_parts'][1] . '.' . $args['link_parts'][2] . '"' . $args['link_parts'][3] . ' data-rel="' . esc_attr( $args['selector'] ) . ( $args['settings']['plugin']['images_as_gallery'] ? esc_attr( $args['rel_hash'] ) : '-image-' . (int) $args['link_number'] ) . '"' . ( $args['script'] === 'magnific' ? ' data-magnific_type="image"' : '' ) . ( $args['script'] === 'imagelightbox' ? ' data-imagelightbox="' . (int) $args['link_number'] . '"' : '' ) . ' data-rl_title="__RL_IMAGE_TITLE__" data-rl_caption="__RL_IMAGE_CAPTION__">' . $args['link_parts'][4] . '</a>';
302	}
303
304	// prepare title and caption
305	$title = trim ( nl2br( $args['title'] ) );
306	$caption = trim( nl2br( $args['caption'] ) );
307
308	if ( ! rl_current_lightbox_supports( 'html_caption' ) ) {
309	$title = wp_strip_all_tags( $title, true );
310	$caption = wp_strip_all_tags( $caption, true );
311	}
312
313	// use safe replacement for data-rl_title and data-rl_caption
314	$link = str_replace( '__RL_IMAGE_TITLE__', esc_attr( $title ), str_replace( '__RL_IMAGE_CAPTION__', esc_attr( $caption ), $link ) );
315
316	// title exists?
317	if ( preg_match( '/<a.? title=(?:\'\|").?(?:\'\|").*?>/is', $link ) === 1 ) {
318	$link = preg_replace( '/(<a.? title=(?:\'\|")).?((?:\'\|").*?>)/s', '${1}__RL_IMAGE_TITLE__$2', $link );
319	} else
320	$link = preg_replace( '/(<a.*?)>/s', '$1 title="__RL_IMAGE_TITLE__">', $link );
321
322	// last safe replacement for title
323	$link = str_replace( '__RL_IMAGE_TITLE__', esc_attr( $title ), $link );
324	}
325
326	return apply_filters( 'rl_lightbox_image_link', $link, $args );
327	}
328
329	/**
330	* Add lightbox to gallery image links.
331	*
332	* @param string $link
333	* @param int\|object $id
334	* @return string
335	*/
336	public function wp_get_attachment_link( $link, $id ) {
337	// get main instance
338	$rl = Responsive_Lightbox();
339
340	if ( $rl->options['settings']['galleries'] && wp_attachment_is_image( $id ) ) {
341	// get current script
342	$script = $rl->get_data( 'current_script' );
343
344	// get scripts
345	$scripts = $rl->settings->get_data( 'scripts' );
346
347	// prepare arguments
348	$args = [
349	'selector' => $rl->options['settings']['selector'],
350	'script' => $script,
351	'settings' => [
352	'script' => $rl->options['configuration'][$script],
353	'plugin' => $rl->options['settings']
354	],
355	'supports' => $scripts[$script]['supports'],
356	'image_id' => is_object( $id ) ? $id->id : $id,
357	'title' => '',
358	'caption' => '',
359	'src' => []
360	];
361
362	$link = $this->lightbox_gallery_link( $link, $args );
363	}
364
365	return $link;
366	}
367
368	/**
369	* Add lightbox to gallery image links.
370	*
371	* @param string $link Gallery image link
372	* @param array $args Gallery link arguments
373	* @return string
374	*/
375	public function lightbox_gallery_link( $link, $args ) {
376	// gallery image title
377	$title = ! empty( $args['title'] ) ? $args['title'] : '';
378
379	// get title type
380	$title_arg = $args['settings']['plugin']['gallery_image_title'];
381
382	// update title if needed
383	if ( ! empty( $args['image_id'] ) && $title_arg !== 'default' ) {
384	// original title
385	$args['title'] = $this->get_attachment_title( $args['image_id'], apply_filters( 'rl_lightbox_attachment_image_title_arg', $title_arg, $args['image_id'], $link ) );
386	}
387
388	// prepare title
389	$title = trim ( nl2br( $args['title'] ) );
390
391	if ( ! rl_current_lightbox_supports( 'html_caption' ) )
392	$title = wp_strip_all_tags( $title, true );
393
394	// use safe replacement for title and data-rl_title
395	if ( preg_match( '/<a.? title=(?:\'\|").?(?:\'\|").*?>/is', $link ) === 1 )
396	$link = str_replace( '__RL_IMAGE_TITLE__', esc_attr( $title ), preg_replace( '/(<a.? title=(?:\'\|")).?((?:\'\|").*?>)/s', '$1__RL_IMAGE_TITLE__" data-rl_title="__RL_IMAGE_TITLE__$2', $link ) );
397	else
398	$link = str_replace( '__RL_IMAGE_TITLE__', esc_attr( $title ), preg_replace( '/(<a.*?)>/s', '$1 title="__RL_IMAGE_TITLE__" data-rl_title="__RL_IMAGE_TITLE__">', $link ) );
399
400	// add class if needed
401	if ( preg_match( '/<a[^>]? class=(?:\'\|").?(?:\'\|").*?>/is', $link ) === 1 )
402	$link = preg_replace( '/(<a.?) class=(?:\'\|")(.?)(?:\'\|")(.*?>)/s', '$1 class="$2 rl-gallery-link" $3', $link );
403	else
404	$link = preg_replace( '/(<a.*?)>/s', '$1 class="rl-gallery-link">', $link );
405
406	// gallery image caption
407	$caption = ! empty( $args['caption'] ) ? $args['caption'] : '';
408
409	// get caption type
410	$caption_arg = $args['settings']['plugin']['gallery_image_caption'];
411
412	// update caption if needed
413	if ( ! empty( $args['image_id'] ) && $caption_arg !== 'default' ) {
414	// original caption
415	$args['caption'] = $this->get_attachment_title( $args['image_id'], apply_filters( 'rl_lightbox_attachment_image_title_arg', $caption_arg, $args['image_id'], $link ) );
416	}
417
418	// prepare caption
419	$caption = trim( nl2br( $args['caption'] ) );
420
421	if ( ! rl_current_lightbox_supports( 'html_caption' ) )
422	$caption = wp_strip_all_tags( $caption, true );
423
424	// use safe replacement for data-rl_caption
425	$link = str_replace( '__RL_IMAGE_CAPTION__', esc_attr( $caption ), preg_replace( '/(<a.*?)>/s', '$1 data-rl_caption="__RL_IMAGE_CAPTION__">', $link ) );
426
427	if ( isset( $_GET['rl_gallery_no'], $_GET['rl_page'] ) )
428	$this->gallery_no = (int) $_GET['rl_gallery_no'];
429
430	// link already contains data-rel attribute?
431	if ( preg_match( '/<a[^>]?\bdata-rel=(["\'])(.?)\1[^>]*?>/is', $link, $result ) === 1 ) {
432	if ( $result[2] !== 'norl' )
433	$link = preg_replace( '/\bdata-rel=(["\'])(.*?)\1/s', 'data-rel="' . esc_attr( $args['selector'] ) . '-gallery-' . (int) $this->gallery_no . '"', $link, 1 );
434	} else
435	$link = preg_replace( '/(<a.*?)>/s', '$1 data-rel="' . esc_attr( $args['selector'] ) . '-gallery-' . (int) $this->gallery_no . '">', $link );
436
437	if ( ! ( isset( $args['link'] ) && $args['link'] !== 'file' ) ) {
438	// gallery image size
439	if ( ! empty( $args['image_id'] ) ) {
440	if ( empty( $args['src'] ) )
441	$args['src'] = wp_get_attachment_image_src( $args['image_id'], $args['settings']['plugin']['gallery_image_size'] );
442
443	// valid source?
444	if ( ! empty( $args['src'][0] ) ) {
445	if ( preg_match( '/<a[^>]?\bhref=(["\']).?\1[^>]*?>/is', $link ) === 1 )
446	$link = preg_replace( '/(<a[^>]?\bhref=)(["\']).?\2/is', '$1$2' . $args['src'][0] . '$2', $link, 1 );
447	else
448	$link = preg_replace( '/(<a.*?)>/', '$1 href="' . $args['src'][0] . '">', $link );
449	}
450	}
451
452	if ( $args['script'] === 'magnific' )
453	$link = preg_replace( '/(<a.*?)>/is', '$1 data-magnific_type="gallery">', $link );
454	}
455
456	return apply_filters( 'rl_lightbox_gallery_link', $link, $args );
457	}
458
459	/**
460	* Add lightbox to content links.
461	*
462	* @param string $link
463	* @param array $args
464	*
465	* @return string
466	*/
467	public function lightbox_content_link( $link, $args ) {
468	if ( in_array( $args['content'], $args['supports'], true ) ) {
469	libxml_use_internal_errors( true );
470
471	$dom = new DOMDocument();
472	$dom->loadHTML('<?xml encoding="utf-8" ?>' . $link, LIBXML_HTML_NOIMPLIED \| LIBXML_HTML_NODEFDTD);
473
474	$anchors = $dom->getElementsByTagName( 'a' );
475
476	if ( $anchors->length > 0 ) {
477	$a = $anchors->item( 0 );
478
479	if ( $a->hasAttribute( 'data-rel' ) ) {
480	$value = $a->getAttribute( 'data-rel' );
481	$a->setAttribute( 'data-rel', esc_attr( $args['selector'] ) . '-content-' . esc_attr( base64_encode( $value ) ) );
482	} else
483	$a->setAttribute( 'data-rel', esc_attr( $args['selector'] ) . '-content-' . (int) $args['link_number'] );
484
485	// remove ending </a> tag
486	$link = preg_replace( '/<\/a>$/', '', $dom->saveHTML($a));
487	}
488
489	libxml_use_internal_errors( false );
490
491	switch ( $args['script'] ) {
492	case 'nivo':
493	$link = preg_replace( '/(<a.*?)>/s', '$1 data-lightbox-type="' . esc_attr( $args['content'] ) . '">', $link );
494	break;
495
496	case 'featherlight':
497	$link = preg_replace( '/(<a.*?)>/s', '$1 data-featherlight="' . esc_attr( $args['content'] ) . '">', $link );
498	break;
499
500	case 'prettyphoto':
501	if ( $args['content'] === 'iframe' )
502	$link = preg_replace( '/(<a[^>]?\bhref=)(["\'])(.?)\2/is', '$1$2' . add_query_arg( [ 'iframe' => 'true', 'width' => (int) $args['settings']['width'], 'height' => (int) $args['settings']['height'] ], '$3' ) . '$2', $link, 1 );
503	}
504	}
505
506	return apply_filters( 'rl_lightbox_content_link', $link, $args );
507	}
508
509	/**
510	* Get gallery fields.
511	*
512	* @param string $type Gallery type
513	* @return array
514	*/
515	public function get_gallery_fields( $type ) {
516	// get main instance
517	$rl = Responsive_Lightbox();
518
519	// get gallery fields
520	$gallery_fields = $rl->settings->get_setting_fields( $type . '_gallery' );
521
522	// assign settings and defaults
523	$gallery_defaults = $rl->defaults[$type . '_gallery'];
524	$gallery_values = $rl->options[$type . '_gallery'];
525
526	// make a copy
527	$fields_copy = $gallery_fields;
528
529	foreach ( $fields_copy as $field_key => $field ) {
530	if ( $field['type'] === 'multiple' ) {
531	foreach ( $field['fields'] as $subfield_key => $subfield ) {
532	$gallery_fields[$field_key]['fields'][$subfield_key]['default'] = $gallery_defaults[$subfield_key];
533	$gallery_fields[$field_key]['fields'][$subfield_key]['value'] = array_key_exists( $subfield_key, $gallery_values ) ? $gallery_values[$subfield_key] : $gallery_defaults[$subfield_key];
534	}
535	} else {
536	$gallery_fields[$field_key]['default'] = $gallery_defaults[$field_key];
537	$gallery_fields[$field_key]['value'] = array_key_exists( $field_key, $gallery_values ) ? $gallery_values[$field_key] : $gallery_defaults[$field_key];
538	}
539	}
540
541	// get shortcode gallery fields combined with defaults
542	return apply_filters( 'rl_get_gallery_fields', $this->get_unique_fields( $this->get_default_gallery_fields(), $gallery_fields ) );
543	}
544
545	/**
546	* Get unique gallery fields.
547	*
548	* @param array $defaults Default gallery fields
549	* @param array $fields Custom gallery fields
550	* @return array
551	*/
552	public function get_unique_fields( $defaults, $fields ) {
553	// check duplicated fields
554	$duplicates = array_intersect_key( $defaults, $fields );
555
556	// any duplicated fields?
557	if ( ! empty( $duplicates ) ) {
558	foreach ( $duplicates as $field_id => $field ) {
559	unset( $defaults[$field_id] );
560	}
561	}
562
563	// get default and custom fields all together
564	return $defaults + $fields;
565	}
566
567	/**
568	* Get gallery fields combined with shortcode attributes.
569	*
570	* @param array $fields Gallery fields
571	* @param array $shortcode_atts Gallery shortcode attributes
572	* @param bool $gallery Whether is it rl_gallery shortcode
573	* @return array
574	*/
575	public function get_gallery_fields_atts( $fields, $shortcode_atts, $gallery = true ) {
576	// prepare default values
577	$field_atts = [];
578
579	// get all default field values
580	foreach ( $fields as $field_key => $field ) {
581	if ( $field['type'] === 'multiple' ) {
582	foreach ( $field['fields'] as $subfield_key => $subfield ) {
583	$field_atts[$subfield_key] = array_key_exists( 'value', $subfield ) ? $subfield['value'] : $subfield['default'];
584	}
585	} else
586	$field_atts[$field_key] = array_key_exists( 'value', $field ) ? $field['value'] : $field['default'];
587	}
588
589	// is it rl gallery?
590	if ( $gallery ) {
591	// get tabs
592	$tabs = Responsive_Lightbox()->galleries->get_data( 'tabs' );
593
594	if ( ! empty( $tabs ) ) {
595	foreach ( $tabs as $key => $args ) {
596	if ( in_array( $key, [ 'images', 'config' ] ) )
597	continue;
598
599	// get additional fields
600	$data = get_post_meta( $shortcode_atts['rl_gallery_id'], '_rl_' . $key, true );
601
602	// add those fields
603	if ( ! empty( $data['menu_item'] ) && is_array( $data[$data['menu_item']] ) ) {
604	$new_data = $data[$data['menu_item']];
605
606	if ( $key === 'design' ) {
607	// remove show_title to avoid shortcode attribute duplication
608	if ( isset( $new_data['show_title'] ) ) {
609	if ( ! isset( $new_data['design_show_title'] ) )
610	$new_data['design_show_title'] = $new_data['show_title'];
611
612	unset( $new_data['show_title'] );
613	}
614
615	// remove show_caption to avoid shortcode attribute duplication
616	if ( isset( $new_data['show_caption'] ) ) {
617	if ( ! isset( $new_data['design_show_caption'] ) )
618	$new_data['design_show_caption'] = $new_data['show_caption'];
619
620	unset( $new_data['show_caption'] );
621	}
622	}
623
624	$field_atts += $new_data;
625	}
626	}
627	}
628
629	if ( $field_atts['hover_effect'] !== '0' )
630	$field_atts['gallery_custom_class'] .= ' rl-hover-effect-' . $field_atts['hover_effect'];
631
632	if ( $field_atts['show_icon'] !== '0' )
633	$field_atts['gallery_custom_class'] .= ' rl-hover-icon-' . $field_atts['show_icon'];
634	}
635
636	return (array) apply_filters( 'rl_get_gallery_fields_atts', $field_atts );
637	}
638
639	/**
640	* Get default gallery fields.
641	*
642	* @return array
643	*/
644	public function get_default_gallery_fields() {
645	$sizes = get_intermediate_image_sizes();
646	$sizes['full'] = 'full';
647
648	return [
649	'size' => [
650	'title' => __( 'Image Size', 'responsive-lightbox' ),
651	'type' => 'select',
652	'description' => __( 'Specify the image size to use for the thumbnail display.', 'responsive-lightbox' ),
653	'default' => 'medium',
654	'options' => array_combine( $sizes, $sizes )
655	],
656	'link' => [
657	'title' => __( 'Link To', 'responsive-lightbox' ),
658	'type' => 'select',
659	'description' => __( 'Specify where you want the image to link.', 'responsive-lightbox' ),
660	'default' => 'file',
661	'options' => [
662	'post' => __( 'Attachment Page', 'responsive-lightbox' ),
663	'file' => __( 'Media File', 'responsive-lightbox' ),
664	'none' => __( 'None', 'responsive-lightbox' )
665	]
666	],
667	'orderby' => [
668	'title' => __( 'Order By', 'responsive-lightbox' ),
669	'type' => 'select',
670	'description' => __( 'Specify how to sort the display thumbnails.', 'responsive-lightbox' ),
671	'default' => 'menu_order',
672	'options' => [
673	'id' => __( 'ID', 'responsive-lightbox' ),
674	'title' => __( 'Title', 'responsive-lightbox' ),
675	'post_date' => __( 'Date', 'responsive-lightbox' ),
676	'menu_order' => __( 'Menu Order', 'responsive-lightbox' ),
677	'rand' => __( 'Random', 'responsive-lightbox' )
678	]
679	],
680	'order' => [
681	'title' => __( 'Order', 'responsive-lightbox' ),
682	'type' => 'radio',
683	'description' => __( 'Specify the sort order.', 'responsive-lightbox' ),
684	'default' => 'asc',
685	'options' => [
686	'asc' => __( 'Ascending', 'responsive-lightbox' ),
687	'desc' => __( 'Descending', 'responsive-lightbox' )
688	]
689	],
690	'columns' => [
691	'title' => __( 'Columns', 'responsive-lightbox' ),
692	'type' => 'number',
693	'description' => __( 'Specify the number of columns.', 'responsive-lightbox' ),
694	'default' => 3,
695	'min' => 1,
696	'max' => 12
697	]
698	];
699	}
700
701	/**
702	* Sanitize shortcode gallery arguments.
703	*
704	* @param array $atts Shortcode arguments
705	* @param array $fields Gallery fields
706	* @return array
707	*/
708	public function sanitize_shortcode_args( $atts, $fields ) {
709	// get main instance
710	$rl = Responsive_Lightbox();
711
712	// validate gallery fields
713	foreach ( $fields as $field_key => $field ) {
714	// checkbox field?
715	if ( $field['type'] === 'checkbox' ) {
716	// valid argument?
717	if ( array_key_exists( $field_key, $atts ) ) {
718	if ( is_array( $atts[$field_key] ) )
719	$array = $atts[$field_key];
720	elseif ( is_string( $atts[$field_key] ) ) {
721	if ( $atts[$field_key] === '' )
722	$array = [];
723	else
724	$array = explode( ',', $atts[$field_key] );
725	} else
726	$array = [];
727
728	$atts[$field_key] = $rl->galleries->sanitize_field( $field_key, array_flip( $array ), $field );
729	}
730	// boolean field?
731	} elseif ( $field['type'] === 'boolean' ) {
732	// multiple field?
733	if ( $field['type'] === 'multiple' ) {
734	foreach ( $field['fields'] as $subfield_key => $subfield ) {
735	// valid argument?
736	if ( array_key_exists( $subfield_key, $atts ) ) {
737	// true value?
738	if ( $atts[$subfield_key] === true \|\| $atts[$subfield_key] === 'true' \|\| $atts[$subfield_key] === '1' )
739	$atts[$subfield_key] = 1;
740	// false value?
741	elseif ( $atts[$subfield_key] === false \|\| $atts[$subfield_key] === 'false' \|\| $atts[$subfield_key] === '0' \|\| $atts[$subfield_key] === '' )
742	$atts[$subfield_key] = 0;
743	// default value
744	else
745	$atts[$subfield_key] = (int) $field['default'];
746	}
747	}
748	} else {
749	// valid argument?
750	if ( array_key_exists( $field_key, $atts ) ) {
751	// true value?
752	if ( $atts[$field_key] === true \|\| $atts[$field_key] === 'true' \|\| $atts[$field_key] === '1' )
753	$atts[$field_key] = 1;
754	// false value?
755	elseif ( $atts[$field_key] === false \|\| $atts[$field_key] === 'false' \|\| $atts[$field_key] === '0' \|\| $atts[$field_key] === '' )
756	$atts[$field_key] = 0;
757	// default value
758	else
759	$atts[$field_key] = (int) $field['default'];
760	}
761	}
762	// multiple field?
763	} elseif ( $field['type'] === 'multiple' ) {
764	foreach ( $field['fields'] as $subfield_key => $subfield ) {
765	// valid argument?
766	if ( array_key_exists( $subfield_key, $atts ) )
767	$atts[$subfield_key] = $rl->galleries->sanitize_field( $subfield_key, $atts[$subfield_key], $subfield );
768	}
769	// other field?
770	} else {
771	// valid argument?
772	if ( array_key_exists( $field_key, $atts ) )
773	$atts[$field_key] = $rl->galleries->sanitize_field( $field_key, $atts[$field_key], $field );
774	}
775	}
776
777	return (array) apply_filters( 'rl_sanitize_shortcode_args', $atts );
778	}
779
780	/**
781	* Get gallery images.
782	*
783	* @param array $shortcode_atts Gallery arguments
784	* @return array
785	*/
786	public function get_gallery_shortcode_images( $shortcode_atts ) {
787	// get main instance
788	$rl = Responsive_Lightbox();
789
790	if ( ! isset( $shortcode_atts['design_show_title'] ) \|\| $shortcode_atts['design_show_title'] === 'global' )
791	$shortcode_atts['design_show_title'] = $rl->options['settings']['gallery_image_title'];
792
793	if ( ! isset( $shortcode_atts['design_show_caption'] ) \|\| $shortcode_atts['design_show_caption'] === 'global' )
794	$shortcode_atts['design_show_caption'] = $rl->options['settings']['gallery_image_caption'];
795
796	$images = [];
797
798	// get gallery id
799	$gallery_id = ! empty( $shortcode_atts['rl_gallery_id'] ) ? absint( $shortcode_atts['rl_gallery_id'] ) : 0;
800
801	// get images from gallery
802	if ( $gallery_id ) {
803	$images = $rl->galleries->get_gallery_images(
804	$gallery_id,
805	[
806	'exclude' => true,
807	'image_size' => $shortcode_atts['src_size'],
808	'thumbnail_size' => $shortcode_atts['size'],
809	'preview' => ( isset( $_GET['rl_gallery_revision_id'], $_GET['preview'] ) && $_GET['preview'] === 'true' ) \|\| ( isset( $_POST['action'], $_POST['preview'] ) && $_POST['action'] === 'rl-get-gallery-page-content' && $_POST['preview'] === 'true' && wp_doing_ajax() )
810	]
811	);
812	// get images from shortcode atts
813	} else {
814	$ids = [];
815
816	if ( ! empty( $shortcode_atts['include'] ) ) {
817	// Normalize input from shortcode strings and widget/programmatic array payloads.
818	$include = wp_parse_id_list( $shortcode_atts['include'] );
819
820	// any attachments?
821	if ( ! empty( $include ) ) {
822	// get attachments
823	$ids = get_posts(
824	[
825	'include' => implode( ',', $include ),
826	'post_status' => 'inherit',
827	'post_type' => 'attachment',
828	'post_mime_type' => 'image',
829	'order' => $shortcode_atts['order'],
830	'orderby' => ( $shortcode_atts['orderby'] === 'menu_order' \|\| $shortcode_atts['orderby'] === '' ? 'post__in' : $shortcode_atts['orderby'] ),
831	'fields' => 'ids'
832	]
833	);
834	}
835	} elseif ( ! empty( $shortcode_atts['exclude'] ) ) {
836	// Normalize input from shortcode strings and widget/programmatic array payloads.
837	$exclude = wp_parse_id_list( $shortcode_atts['exclude'] );
838
839	// any attachments?
840	if ( ! empty( $exclude ) ) {
841	// get attachments
842	$ids = get_children(
843	[
844	'post_parent' => $shortcode_atts['id'],
845	'exclude' => $exclude,
846	'post_status' => 'inherit',
847	'post_type' => 'attachment',
848	'post_mime_type' => 'image',
849	'order' => $shortcode_atts['order'],
850	'orderby' => $shortcode_atts['orderby'],
851	'fields' => 'ids'
852	]
853	);
854	}
855	} else {
856	// get attachments
857	$ids = get_children(
858	[
859	'post_parent' => $shortcode_atts['id'],
860	'post_status' => 'inherit',
861	'post_type' => 'attachment',
862	'post_mime_type' => 'image',
863	'order' => $shortcode_atts['order'],
864	'orderby' => $shortcode_atts['orderby'],
865	'fields' => 'ids'
866	]
867	);
868	}
869
870	// any attachments?
871	if ( ! empty( $ids ) ) {
872	foreach ( $ids as $attachment_id ) {
873	// get thumbnail image data
874	$images[] = $rl->galleries->get_gallery_image_src( $attachment_id, $shortcode_atts['src_size'], $shortcode_atts['size'] );
875	}
876	}
877	}
878
879	// apply adjustments, as per settings
880	if ( $images ) {
881	// get current script
882	$script = $rl->get_data( 'current_script' );
883
884	// get scripts
885	$scripts = $rl->settings->get_data( 'scripts' );
886
887	// prepare arguments
888	$args = [
889	'selector' => $rl->options['settings']['selector'],
890	'script' => $script,
891	'settings' => [
892	'script' => $rl->options['configuration'][$script],
893	'plugin' => $rl->options['settings']
894	],
895	'supports' => isset( $scripts[$script]['supports'] ) ? $scripts[$script]['supports'] : [],
896	'image_id' => 0,
897	'caption' => '',
898	'title' => '',
899	'src' => []
900	];
901
902	// lightbox image title
903	$args['settings']['plugin']['gallery_image_title'] = ! empty( $shortcode_atts['lightbox_image_title'] ) ? ( $shortcode_atts['lightbox_image_title'] === 'global' ? $rl->options['settings']['gallery_image_title'] : $shortcode_atts['lightbox_image_title'] ) : $rl->options['settings']['gallery_image_title'];
904
905	// lightbox image caption
906	$args['settings']['plugin']['gallery_image_caption'] = ! empty( $shortcode_atts['lightbox_image_caption'] ) ? ( $shortcode_atts['lightbox_image_caption'] === 'global' ? $rl->options['settings']['gallery_image_caption'] : $shortcode_atts['lightbox_image_caption'] ) : $rl->options['settings']['gallery_image_caption'];
907
908	// get gallery image link
909	$args['link'] = isset( $shortcode_atts['link'] ) ? $shortcode_atts['link'] : '';
910
911	// copy images
912	$images_tmp = $images;
913
914	// apply adjustments, according to gallery settings
915	foreach ( $images_tmp as $index => $image ) {
916	// assign image
917	$new_image = $images[$index] = array_merge( $image, $rl->galleries->get_gallery_image_src( $image, $shortcode_atts['src_size'], $shortcode_atts['size'] ) );
918
919	// create image source data
920	$args['src'] = [ $new_image['url'], $new_image['width'], $new_image['height'], $new_image ];
921
922	// update image id
923	if ( ! empty( $new_image['id'] ) )
924	$args['image_id'] = $new_image['id'];
925
926	// set alt text
927	$images[$index]['alt'] = $shortcode_atts['alt'] = ! empty( $new_image['alt'] ) ? $new_image['alt'] : ( ! empty( $new_image['id'] ) ? get_post_meta( $new_image['id'], '_wp_attachment_image_alt', true ) : '' );
928
929	// set lightbox image title
930	if ( $args['settings']['plugin']['gallery_image_title'] === 'default' )
931	$images[$index]['title'] = $args['title'] = '';
932	else {
933	// embed element?
934	if ( preg_match( '/^e\d+$/', $new_image['id'] ) === 1 )
935	$shortcode_atts['title'] = $images[$index]['title'] = $args['title'] = $this->get_embed_title( $new_image['id'], apply_filters( 'rl_lightbox_embed_image_title_arg', $args['settings']['plugin']['gallery_image_title'], $images[$index]['link'] ), $new_image );
936	else
937	$images[$index]['title'] = $args['title'] = ! empty( $new_image['id'] ) ? $this->get_attachment_title( $new_image['id'], apply_filters( 'rl_lightbox_attachment_image_title_arg', $args['settings']['plugin']['gallery_image_title'], $new_image['id'], $images[$index]['link'] ) ) : $new_image['title'];
938	}
939
940	// set lightbox image caption
941	if ( $args['settings']['plugin']['gallery_image_caption'] === 'default' )
942	$images[$index]['caption'] = $args['caption'] = '';
943	else {
944	// embed element?
945	if ( preg_match( '/^e\d+$/', $new_image['id'] ) === 1 )
946	$shortcode_atts['caption'] = $images[$index]['caption'] = $args['caption'] = $this->get_embed_title( $new_image['id'], apply_filters( 'rl_lightbox_embed_image_title_arg', $args['settings']['plugin']['gallery_image_caption'], $images[$index]['link'] ), $new_image );
947	else
948	$images[$index]['caption'] = $args['caption'] = ! empty( $new_image['id'] ) ? $this->get_attachment_title( $new_image['id'], apply_filters( 'rl_lightbox_attachment_image_title_arg', $args['settings']['plugin']['gallery_image_caption'], $images[$index]['link'] ) ) : $new_image['caption'];
949	}
950
951	// set image gallery link
952	$images[$index]['link'] = $this->lightbox_gallery_link( $this->get_gallery_image_link( $new_image['id'], $args['src'], [ $new_image['thumbnail_url'], $new_image['thumbnail_width'], $new_image['thumbnail_height'] ], $shortcode_atts ), $args );
953
954	// is lightbox active?
955	if ( isset( $shortcode_atts['lightbox_enable'] ) && $shortcode_atts['lightbox_enable'] === 0 )
956	$images[$index]['link'] = preg_replace( '/\bdata-rel=(["\'])(.*?)\1/', 'data-rel="norl"', $images[$index]['link'], 1 );
957	}
958	}
959
960	return (array) apply_filters( 'rl_get_gallery_shortcode_images', $images, $gallery_id, $shortcode_atts );
961	}
962
963	/**
964	* Get gallery image link.
965	*
966	* @param int $attachment_id Attachment ID
967	* @param array $image Source image data
968	* @param array $thumbnail Thumbnail image data
969	* @param array $args Arguments
970	* @return string
971	*/
972	function get_gallery_image_link( $attachment_id, $image, $thumbnail, $args ) {
973	// link type
974	switch ( $args['link'] ) {
975	case 'post':
976	// embed element?
977	if ( preg_match( '/^e\d+$/', $attachment_id ) === 1 )
978	$attr = [ 'href' => $image[0] ];
979	else
980	$attr = [ 'href' => get_permalink( $attachment_id ) ];
981	break;
982
983	case 'none':
984	$attr = [ 'href' => 'javascript:void(0);', 'style' => 'cursor: default;' ];
985	break;
986
987	default:
988	case 'file':
989	$attr = [ 'href' => $image[0] ];
990	}
991
992	// filter attributes
993	$attr = apply_filters( 'rl_gallery_image_link_attributes', $attr, $attachment_id, $image, $args );
994
995	// start link
996	$link = '<a';
997
998	// escape attributes
999	foreach ( $attr as $name => $value ) {
1000	$link .= ' ' . esc_attr( $name ) . '="' . ( $name === 'href' ? esc_url( $value ) : esc_attr( $value ) ) . '"';
1001	}
1002
1003	$link .= '>';
1004	$link .= apply_filters( 'rl_gallery_image_link_before', '', $attachment_id, $args );
1005	$link .= '<img src="' . esc_url( $thumbnail[0] ) . '" width="' . (int) $thumbnail[1] . '" height="' . (int) $thumbnail[2] . '" alt="' . esc_attr( $args['alt'] ) . '"' . ( isset( $args['hide_image'] ) && $args['hide_image'] ? ' style="display: none;"' : '' ) . '/>';
1006
1007	// embed element?
1008	if ( preg_match( '/^e\d+$/', $attachment_id ) === 1 ) {
1009	$title = ! empty( $args['design_show_title'] ) ? $this->get_embed_title( $attachment_id, $args['design_show_title'], $args ) : '';
1010	$caption = ! empty( $args['design_show_caption'] ) ? $this->get_embed_title( $attachment_id, $args['design_show_caption'], $args ) : '';
1011	} else {
1012	$title = ! empty( $args['design_show_title'] ) ? $this->get_attachment_title( $attachment_id, $args['design_show_title'] ) : '';
1013	$caption = ! empty( $args['design_show_caption'] ) ? $this->get_attachment_title( $attachment_id, $args['design_show_caption'] ) : '';
1014	}
1015
1016	if ( $title \|\| $caption ) {
1017	$link .= '<span class="rl-gallery-caption">';
1018
1019	if ( $title )
1020	$link .= '<span class="rl-gallery-item-title">' . esc_html( $title ) . '</span>';
1021
1022	if ( $caption )
1023	$link .= '<span class="rl-gallery-item-caption">' . esc_html( $caption ) . '</span>';
1024
1025	$link .= '</span>';
1026	}
1027
1028	$link .= apply_filters( 'rl_gallery_image_link_after', '', $attachment_id, $args );
1029	$link .= '</a>';
1030
1031	return apply_filters( 'rl_gallery_image_link', $link, $attachment_id, $image, $thumbnail, $args );
1032	}
1033
1034	/**
1035	* Add lightbox to Jetpack tiled gallery.
1036	*
1037	* @param string $content
1038	* @return string
1039	*/
1040	public function force_custom_gallery_lightbox( $content ) {
1041	// get main instance
1042	$rl = Responsive_Lightbox();
1043
1044	if ( $rl->options['settings']['force_custom_gallery'] ) {
1045	// search for image links
1046	preg_match_all( '/<a(.?)\bhref=(["\'])([^"\']?)\.(bmp\|gif\|jpeg\|jpg\|png\|webp)\2(.*?)>/i', $content, $links );
1047
1048	// found any links?
1049	if ( ! empty ( $links[0] ) ) {
1050	// get current script
1051	$script = $rl->get_data( 'current_script' );
1052
1053	foreach ( $links[0] as $link_number => $link ) {
1054	// get attachment id
1055	$image_id = $this->get_attachment_id_by_url( $links[3][$link_number] . '.' . $links[4][$link_number] );
1056
1057	// get title type
1058	$title_arg = $rl->options['settings']['gallery_image_title'];
1059
1060	// update title if needed
1061	if ( $title_arg !== 'default' && $image_id )
1062	$title = wp_strip_all_tags( $this->get_attachment_title( $image_id, apply_filters( 'rl_lightbox_attachment_image_title_arg', $title_arg, $image_id, $links[3][$link_number] . '.' . $links[4][$link_number] ) ), true );
1063	else
1064	$title = '';
1065
1066	// get caption type
1067	$caption_arg = $rl->options['settings']['gallery_image_caption'];
1068
1069	// update caption if needed
1070	if ( $caption_arg !== 'default' )
1071	$caption = wp_strip_all_tags( $this->get_attachment_title( $image_id, apply_filters( 'rl_lightbox_attachment_image_title_arg', $caption_arg, $image_id, $links[3][$link_number] . '.' . $links[4][$link_number] ) ), true );
1072	else
1073	$caption = '';
1074
1075	// link already contains data-rel attribute?
1076	if ( preg_match( '/<a[^>]?\bdata-rel=(["\'])(.?)\1[^>]*?>/i', $link, $result ) === 1 ) {
1077	// do not modify this link
1078	if ( $result[2] === 'norl' )
1079	continue;
1080
1081	$content = str_replace( $link, preg_replace( '/\bdata-rel=(["\'])(.*?)\1/', 'data-rel="' . esc_attr( $rl->options['settings']['selector'] ) . '-gallery-' . esc_attr( base64_encode( sanitize_text_field( $result[2] ) ) ) . '" data-rl_title="' . esc_attr( $title ) . '" data-rl_caption="' . esc_attr( $caption ) . '"' . ( $script === 'imagelightbox' ? ' data-imagelightbox="' . (int) $link_number . '"' : '' ), $link, 1 ), $content );
1082	} elseif ( preg_match( '/<a[^>]?\brel=(["\'])(.?)\1[^>]*?>/i', $link, $result ) === 1 ) {
1083	// do not modify this link
1084	if ( $result[2] === 'norl' )
1085	continue;
1086
1087	$content = str_replace( $link, preg_replace( '/\brel=(["\'])(.*?)\1/', 'data-rel="' . esc_attr( $rl->options['settings']['selector'] ) . '-gallery-' . esc_attr( base64_encode( sanitize_text_field( $result[2] ) ) ) . '" data-rl_title="' . esc_attr( $title ) . '" data-rl_caption="' . esc_attr( $caption ) . '"' . ( $script === 'imagelightbox' ? ' data-imagelightbox="' . (int) $link_number . '"' : '' ), $link, 1 ), $content );
1088	} else
1089	$content = str_replace( $link, '<a' . $links[1][$link_number] . ' href="' . $links[3][$link_number] . '.' . $links[4][$link_number] . '" data-rel="' . esc_attr( $rl->options['settings']['selector'] ) . '-gallery-' . esc_attr( base64_encode( $this->gallery_no ) ) . '" data-rl_title="' . esc_attr( $title ) . '" data-rl_caption="' . esc_attr( $caption ) . '"' . ( $script === 'imagelightbox' ? ' data-imagelightbox="' . (int) $link_number . '"' : '' ) . $links[5][$link_number] . '>', $content );
1090	}
1091	}
1092	}
1093
1094	return $content;
1095	}
1096
1097	/**
1098	* Remove specific styles and scripts.
1099	*
1100	* @global object $woocommerce
1101	*
1102	* @return void
1103	*/
1104	public function wp_dequeue_scripts() {
1105	// woocommerce
1106	if ( class_exists( 'WooCommerce' ) ) {
1107	global $woocommerce;
1108
1109	// get main instance
1110	$rl = Responsive_Lightbox();
1111
1112	// specific woocommerce gallery?
1113	if ( ! empty( $rl->options['settings']['default_woocommerce_gallery'] ) && $rl->options['settings']['default_woocommerce_gallery'] !== 'default' ) {
1114	// replace default woocommerce lightbox?
1115	if ( $rl->options['settings']['woocommerce_gallery_lightbox'] === true ) {
1116	if ( version_compare( $woocommerce->version, '3.0', ">=" ) ) {
1117	// dequeue scripts
1118	wp_dequeue_script( 'flexslider' );
1119	wp_dequeue_script( 'photoswipe' );
1120	wp_dequeue_script( 'photoswipe-ui-default' );
1121
1122	// dequeue styles
1123	wp_dequeue_style( 'photoswipe' );
1124	wp_dequeue_style( 'photoswipe-default-skin' );
1125
1126	// remove theme supports
1127	remove_theme_support( 'wc-product-gallery-lightbox' );
1128	remove_theme_support( 'wc-product-gallery-slider' );
1129	} else {
1130	// remove styles
1131	wp_dequeue_style( 'woocommerce_prettyPhoto_css' );
1132
1133	// remove scripts
1134	wp_dequeue_script( 'prettyPhoto' );
1135	wp_dequeue_script( 'prettyPhoto-init' );
1136	wp_dequeue_script( 'enable-lightbox' );
1137	}
1138	} else {
1139	if ( version_compare( $woocommerce->version, '3.0', ">=" ) ) {
1140	// dequeue scripts
1141	wp_dequeue_script( 'flexslider' );
1142	}
1143	}
1144	// default gallery?
1145	} else {
1146	// replace default woocommerce lightbox?
1147	if ( $rl->options['settings']['woocommerce_gallery_lightbox'] === true ) {
1148	if ( version_compare( $woocommerce->version, '3.0', ">=" ) ) {
1149	// dequeue scripts
1150	wp_dequeue_script( 'photoswipe' );
1151	wp_dequeue_script( 'photoswipe-ui-default' );
1152
1153	// dequeue styles
1154	wp_dequeue_style( 'photoswipe' );
1155	wp_dequeue_style( 'photoswipe-default-skin' );
1156
1157	// remove theme supports
1158	remove_theme_support( 'wc-product-gallery-lightbox' );
1159	} else {
1160	// remove styles
1161	wp_dequeue_style( 'woocommerce_prettyPhoto_css' );
1162
1163	// remove scripts
1164	wp_dequeue_script( 'prettyPhoto' );
1165	wp_dequeue_script( 'prettyPhoto-init' );
1166	wp_dequeue_script( 'enable-lightbox' );
1167	}
1168	}
1169	}
1170	}
1171
1172	// visual composer
1173	if ( class_exists( 'Vc_Manager' ) ) {
1174	wp_dequeue_script( 'prettyphoto' );
1175	wp_deregister_script( 'prettyphoto' );
1176	wp_dequeue_style( 'prettyphoto' );
1177	wp_deregister_style( 'prettyphoto' );
1178	}
1179	}
1180
1181	/**
1182	* Apply lightbox to WooCommerce product image.
1183	*
1184	* @param string $html
1185	* @return string
1186	*/
1187	public function woocommerce_single_product_image_html( $html ) {
1188	// get main instance
1189	$rl = Responsive_Lightbox();
1190
1191	if ( $rl->options['settings']['woocommerce_gallery_lightbox'] )
1192	$html = preg_replace( '/data-rel=\"(.*?)\"/', 'data-rel="' . esc_attr( $rl->options['settings']['selector'] ) . '-gallery-' . (int) $this->gallery_no . '"', $html );
1193
1194	return $html;
1195	}
1196
1197	/**
1198	* Apply lightbox to WooCommerce product gallery.
1199	*
1200	* @param string $html
1201	* @param int $attachment_id
1202	* @return string
1203	*/
1204	public function woocommerce_single_product_image_thumbnail_html( $html, $attachment_id ) {
1205	// get main instance
1206	$rl = Responsive_Lightbox();
1207
1208	if ( $rl->options['settings']['woocommerce_gallery_lightbox'] ) {
1209	// make sure main product image has same gallery number
1210	$gallery_no = $this->gallery_no + 1;
1211
1212	$html = preg_replace( '/data-rel=\"(.*?)\"/', 'data-rel="' . esc_attr( $rl->options['settings']['selector'] ) . '-gallery-' . (int) $gallery_no . '"', $html );
1213
1214	preg_match( '/<a(.?)((?:data-rel)=(?:\'\|").?(?:\'\|"))(.*?)>/i', $html, $result );
1215
1216	// no data-rel?
1217	if ( empty( $result ) ) {
1218	preg_match( '/^(.?)<a(.?)((?:href)=(?:\'\|").?(?:\'\|"))(.?)>(.*?)$/i', $html, $result );
1219
1220	// found valid link?
1221	if ( ! empty( $result ) )
1222	$html = $result[1] . '<a' . $result[2] . 'data-rel="' . esc_attr( $rl->options['settings']['selector'] ) . '-gallery-' . (int) $gallery_no . '" ' . $result[3] . $result[4] . '>' . $result[5];
1223	}
1224
1225	$html = $this->woocommerce_gallery_link( $html, $attachment_id );
1226	}
1227
1228	return $html;
1229	}
1230
1231	/**
1232	* Add title and caption to WooCommerce gallery image links.
1233	*
1234	* @param string $link
1235	* @param int $attachment_id
1236	* @return string
1237	*/
1238	public function woocommerce_gallery_link( $link, $attachment_id ) {
1239	// get main instance
1240	$rl = Responsive_Lightbox();
1241
1242	// gallery image title
1243	$title = '';
1244
1245	// get title type
1246	$title_arg = $rl->options['settings']['gallery_image_title'];
1247
1248	// update title if needed
1249	if ( $title_arg !== 'default' ) {
1250	// original title
1251	$title = $this->get_attachment_title( $attachment_id, apply_filters( 'rl_lightbox_attachment_image_title_arg', $title_arg, $attachment_id, $link ) );
1252	}
1253
1254	if ( $title !== '' ) {
1255	// title
1256	$title = trim( nl2br( $title ) );
1257
1258	if ( ! rl_current_lightbox_supports( 'html_caption' ) )
1259	$title = wp_strip_all_tags( $title, true );
1260
1261	// add title and rl_title if needed
1262	if ( preg_match( '/<a[^>]?title=(?:\'\|")[^>]?(?:\'\|").*?>/is', $link ) === 1 )
1263	$link = str_replace( '__RL_IMAGE_TITLE__', esc_attr( $title ), preg_replace( '/(<a[^>]?title=(?:\'\|"))[^>]?((?:\'\|").*?>)/is', '$1__RL_IMAGE_TITLE__" data-rl_title="__RL_IMAGE_TITLE__$2', $link ) );
1264	else
1265	$link = str_replace( '__RL_IMAGE_TITLE__', esc_attr( $title ), preg_replace( '/(<a[^>]*?)>/is', '$1 title="__RL_IMAGE_TITLE__" data-rl_title="__RL_IMAGE_TITLE__">', $link ) );
1266	}
1267
1268	// gallery image caption
1269	$caption = '';
1270
1271	// get caption type
1272	$caption_arg = $rl->options['settings']['gallery_image_caption'];
1273
1274	// update caption if needed
1275	if ( $caption_arg !== 'default' ) {
1276	// original caption
1277	$caption = $this->get_attachment_title( $attachment_id, apply_filters( 'rl_lightbox_attachment_image_title_arg', $caption_arg, $attachment_id, $link ) );
1278	}
1279
1280	if ( $caption !== '' ) {
1281	// caption
1282	$caption = trim( nl2br( $caption ) );
1283
1284	if ( ! rl_current_lightbox_supports( 'html_caption' ) )
1285	$caption = wp_strip_all_tags( $caption, true );
1286
1287	// add rl_caption
1288	$link = str_replace( '__RL_IMAGE_CAPTION__', esc_attr( $caption ), preg_replace( '/(<a[^>]*?)>/is', '$1 data-rl_caption="__RL_IMAGE_CAPTION__">', $link ) );
1289	}
1290
1291	if ( $rl->get_data( 'current_script' ) === 'magnific' )
1292	$link = preg_replace( '/(<a[^>]*?)>/is', '$1 data-magnific_type="gallery">', $link );
1293
1294	return $link;
1295	}
1296
1297	/**
1298	* WooCommerce gallery init.
1299	*
1300	* @return void
1301	*/
1302	public function woocommerce_gallery_init() {
1303	// get main instance
1304	$rl = Responsive_Lightbox();
1305
1306	if ( ( $priority = has_action( 'woocommerce_product_thumbnails', 'woocommerce_show_product_thumbnails' ) ) !== false && ! empty( $rl->options['settings']['default_woocommerce_gallery'] ) && $rl->options['settings']['default_woocommerce_gallery'] !== 'default' ) {
1307	// remove default gallery
1308	remove_action( 'woocommerce_product_thumbnails', 'woocommerce_show_product_thumbnails', $priority );
1309
1310	// handle product gallery
1311	add_action( 'woocommerce_product_thumbnails', [ $this, 'woocommerce_gallery' ], $priority );
1312	}
1313	}
1314
1315	/**
1316	* WooCommerce gallery support.
1317	*
1318	* @global object $product
1319	*
1320	* @return void
1321	*/
1322	public function woocommerce_gallery() {
1323	global $product;
1324
1325	$attachment_ids = [];
1326
1327	// woocommerce 3.x
1328	if ( method_exists( $product, 'get_gallery_image_ids' ) )
1329	$attachment_ids = $product->get_gallery_image_ids();
1330	// woocommerce 2.x
1331	elseif ( method_exists( $product, 'get_gallery_attachment_ids' ) )
1332	$attachment_ids = $product->get_gallery_attachment_ids();
1333
1334	if ( ! empty( $attachment_ids ) && is_array( $attachment_ids ) )
1335	echo do_shortcode( '[gallery type="' . esc_attr( Responsive_Lightbox()->options['settings']['default_woocommerce_gallery'] ) . '" size="medium" ids="' . esc_attr( implode( ',', $attachment_ids ) ) . '"]' );
1336	}
1337
1338	/**
1339	* Get embed text.
1340	*
1341	* @param string $id
1342	* @param string $title_arg
1343	* @param array $embed
1344	* @return false\|string
1345	*/
1346	public function get_embed_title( $id, $title_arg, $embed ) {
1347	if ( empty( $title_arg ) \|\| empty( $id ) )
1348	return false;
1349
1350	switch( $title_arg ) {
1351	case 'title':
1352	$text = $embed['title'];
1353	break;
1354
1355	// caption is always the same for these options
1356	case 'caption':
1357	case 'alt':
1358	case 'description':
1359	$text = $embed['caption'];
1360	break;
1361
1362	default:
1363	$text = '';
1364	}
1365
1366	return trim( apply_filters( 'rl_get_embed_title', $text, $id, $title_arg, $embed ) );
1367	}
1368
1369	/**
1370	* Get attachment text.
1371	*
1372	* @param int $id
1373	* @param string $title_arg
1374	* @return false\|string
1375	*/
1376	public function get_attachment_title( $id, $title_arg ) {
1377	if ( empty( $title_arg ) \|\| empty( $id ) )
1378	return false;
1379
1380	switch( $title_arg ) {
1381	case 'title':
1382	$text = get_the_title( $id );
1383	break;
1384
1385	case 'caption':
1386	$text = get_post_field( 'post_excerpt', $id ) ;
1387	break;
1388
1389	case 'alt':
1390	$text = get_post_meta( $id, '_wp_attachment_image_alt', true );
1391	break;
1392
1393	case 'description':
1394	$text = get_post_field( 'post_content', $id ) ;
1395	break;
1396
1397	default:
1398	$text = '';
1399	}
1400
1401	return trim( apply_filters( 'rl_get_attachment_title', $text, $id, $title_arg ) );
1402	}
1403
1404	/**
1405	* Get attachment ID by url, adjusted to work for cropped and scaled images.
1406	*
1407	* @param string $url
1408	* @return int
1409	*/
1410	public function get_attachment_id_by_url( $url ) {
1411	$org_url = $url;
1412
1413	// parse url
1414	$url = ! empty( $url ) ? esc_url_raw( $url ) : '';
1415
1416	// get url with both schemes
1417	$url_http = set_url_scheme( $url, 'http' );
1418	$url_https = set_url_scheme( $url, 'https' );
1419
1420	// https? set scheme order
1421	if ( is_ssl() )
1422	$urls = [ $url_https, $url_http ];
1423	else
1424	$urls = [ $url_http, $url_https ];
1425
1426	// get upload dir
1427	$dir = wp_get_upload_dir();
1428
1429	// set base url
1430	$base_url = $dir['baseurl'];
1431
1432	if ( is_ssl() )
1433	$base_url = set_url_scheme( $base_url, 'https' );
1434
1435	// set post id
1436	$post_id = 0;
1437
1438	// get cached data
1439	$post_ids = get_transient( 'rl-attachment_ids_by_url' );
1440
1441	// set default flag
1442	$update_transient = false;
1443
1444	// check url with forced scheme based on is_ssl(), then fallback to second one
1445	foreach ( $urls as $url_with_scheme ) {
1446	// set current url
1447	$url = $url_with_scheme;
1448
1449	// cached url not found?
1450	if ( $post_ids === false \|\| ! in_array( $url_with_scheme, array_keys( $post_ids ), true ) ) {
1451	// try to get post id
1452	$post_id = $this->_get_attachment_id_by_url( $url_with_scheme, $base_url );
1453
1454	// set flag
1455	$update_transient = true;
1456	// cached url found
1457	} elseif ( ! empty( $post_ids[$url_with_scheme] ) )
1458	$post_id = (int) $post_ids[$url_with_scheme];
1459	// found post id but it is zero
1460	else {
1461	// try to refresh post id
1462	$post_id = $this->_get_attachment_id_by_url( $url_with_scheme, $base_url );
1463
1464	// set flag
1465	$update_transient = true;
1466	}
1467
1468	if ( $post_id )
1469	break;
1470
1471	// set default flag
1472	$update_transient = false;
1473	}
1474
1475	if ( $update_transient ) {
1476	// set the cache expiration, 24 hours by default
1477	$expire = (int) apply_filters( 'rl_object_cache_expire', DAY_IN_SECONDS );
1478
1479	if ( ! is_array( $post_ids ) )
1480	$post_ids = [];
1481
1482	// update post ids
1483	$post_ids[$url] = $post_id;
1484
1485	// set transient
1486	set_transient( 'rl-attachment_ids_by_url', $post_ids, $expire );
1487	}
1488
1489	return (int) apply_filters( 'rl_get_attachment_id_by_url', $post_id, $org_url );
1490	}
1491
1492	/**
1493	* Get attachment ID by url.
1494	*
1495	* @param string $url
1496	* @param string $base_url
1497	* @return int
1498	*/
1499	private function _get_attachment_id_by_url( $url, $base_url ) {
1500	// try to get post id
1501	$post_id = (int) attachment_url_to_postid( $url );
1502
1503	// no post id?
1504	if ( ! $post_id ) {
1505	$path = $url;
1506
1507	if ( strpos( $path, $base_url . '/' ) === 0 )
1508	$path = substr( $path, strlen( $base_url . '/' ) );
1509
1510	// try to check full size image
1511	if ( preg_match( '/^(.)(\-\dx\d*)(\.\w{1,})/i', $path, $matches ) )
1512	$post_id = (int) attachment_url_to_postid( $base_url . '/' . $matches[1] . $matches[3] );
1513
1514	// try to check scaled size image
1515	if ( ! $post_id && ! empty( $matches[1] ) && ! empty( $matches[3] ) )
1516	$post_id = (int) attachment_url_to_postid( $base_url . '/' . $matches[1] . '-scaled' . $matches[3] );
1517	}
1518
1519	return $post_id;
1520	}
1521
1522	/**
1523	* Get image size by URL.
1524	*
1525	* @param string $url Image URL
1526	* @return array
1527	*/
1528	public function get_image_size_by_url( $url ) {
1529	$size = [ 0, 0 ];
1530	$sanitized_url = $this->sanitize_remote_image_url( $url );
1531
1532	if ( empty( $sanitized_url ) )
1533	return (array) apply_filters( 'rl_get_image_size_by_url', $size, $sanitized_url );
1534
1535	$url = $sanitized_url;
1536
1537	$image_sizes = get_transient( 'rl-image_sizes_by_url' );
1538
1539	if ( ! is_array( $image_sizes ) )
1540	$image_sizes = [];
1541
1542	if ( isset( $image_sizes[$url] ) && is_array( $image_sizes[$url] ) ) {
1543	$size = array_map( 'absint', $image_sizes[$url] );
1544	} else {
1545	$size = $this->remote_image_size_lookup( $url );
1546
1547	if ( $size[0] > 0 && $size[1] > 0 ) {
1548	$image_sizes[$url] = $size;
1549	$expire = absint( apply_filters( 'rl_object_cache_expire', DAY_IN_SECONDS ) );
1550	set_transient( 'rl-image_sizes_by_url', $image_sizes, $expire );
1551	}
1552	}
1553
1554	return (array) apply_filters( 'rl_get_image_size_by_url', $size, $url );
1555	}
1556
1557	/**
1558	* Sanitize and validate a remote image URL.
1559	*
1560	* @param string $url
1561	* @return string
1562	*/
1563	public function sanitize_remote_image_url( $url ) {
1564	$url = ! empty( $url ) ? esc_url_raw( $url ) : '';
1565
1566	if ( empty( $url ) )
1567	return '';
1568
1569	$validated_url = wp_http_validate_url( $url );
1570
1571	if ( ! $validated_url )
1572	return '';
1573
1574	$is_allowed = $this->is_remote_image_url_allowed( $validated_url );
1575	$is_allowed = apply_filters( 'rl_is_remote_image_url_allowed', $is_allowed, $validated_url );
1576
1577	return $is_allowed ? $validated_url : '';
1578	}
1579
1580	/**
1581	* Add gallery shortcode to gallery post content.
1582	*
1583	* @param string $content
1584	* @return string
1585	*/
1586	public function gallery_preview( $content ) {
1587	if ( get_post_type() === 'rl_gallery' && ! ( is_archive() && is_main_query() ) )
1588	$content .= do_shortcode( '[rl_gallery id="' . (int) get_the_ID() . '"]' );
1589
1590	return $content;
1591	}
1592
1593	/**
1594	* Helper: gallery number function.
1595	*
1596	* @param string $content
1597	* @param array $shortcode_atts
1598	* @return string
1599	*/
1600	public function gallery_attributes( $content, $shortcode_atts ) {
1601	// private gallery?
1602	if ( isset( $shortcode_atts['rl_gallery_id'] ) && get_post_status( $shortcode_atts['rl_gallery_id'] ) === 'private' && ! current_user_can( 'read_private_posts' ) )
1603	return '';
1604
1605	// check forced gallery number
1606	if ( isset( $shortcode_atts['rl_gallery_no'] ) ) {
1607	$shortcode_atts['rl_gallery_no'] = (int) $shortcode_atts['rl_gallery_no'];
1608
1609	if ( $shortcode_atts['rl_gallery_no'] > 0 )
1610	$this->gallery_no = $shortcode_atts['rl_gallery_no'];
1611	} else
1612	++$this->gallery_no;
1613
1614	// add inline style, to our galleries only
1615	if ( isset( $shortcode_atts['type'] ) ) {
1616	// get main instance
1617	$rl = Responsive_Lightbox();
1618
1619	// gallery style
1620	wp_enqueue_style( 'responsive-lightbox-gallery' );
1621
1622	// is there rl_gallery ID?
1623	$rl_gallery_id = ! empty( $shortcode_atts['rl_gallery_id'] ) ? (int) $shortcode_atts['rl_gallery_id'] : 0;
1624
1625	// is it rl gallery?
1626	$rl_gallery = $rl->options['builder']['gallery_builder'] && $rl_gallery_id && get_post_type( $rl_gallery_id ) === 'rl_gallery';
1627
1628	// is it rl gallery? add design options
1629	if ( $rl_gallery ) {
1630	$gallery_no = $this->gallery_no;
1631
1632	// get fields
1633	$fields = $rl->galleries->get_data( 'fields' );
1634
1635	// get gallery fields attributes
1636	$field_atts = rl_get_gallery_fields_atts( $fields['design']['options'], $shortcode_atts, $rl_gallery );
1637
1638	// get only valid arguments
1639	$atts = shortcode_atts( $field_atts, array_merge( $field_atts, $shortcode_atts ), 'gallery' );
1640
1641	// sanitize gallery fields
1642	$atts = $this->sanitize_shortcode_args( $atts, $fields['design']['options'] );
1643
1644	// convert color
1645	$background_color = $rl->hex2rgb( $atts['background_color'] );
1646
1647	// invalid color?
1648	if ( ! $background_color )
1649	$background_color = '0,0,0';
1650	else
1651	$background_color = implode( ',', $background_color );
1652
1653	// get opacity
1654	$opacity = (string) round( $atts['background_opacity'] / 100, 2 );
1655
1656	// prepare style data
1657	$style_data = '
1658	#rl-gallery-container-' . $gallery_no . ' .rl-gallery .rl-gallery-link {
1659	border: ' . (int) $atts['border_width'] . 'px solid ' . esc_attr( $atts['border_color'] ) . ';
1660	}
1661	#rl-gallery-container-' . $gallery_no . ' .rl-gallery .rl-gallery-link .rl-gallery-item-title {
1662	color: ' . esc_attr( $atts['title_color'] ) . ';
1663	}
1664	#rl-gallery-container-' . $gallery_no . ' .rl-gallery .rl-gallery-link .rl-gallery-item-caption {
1665	color: ' . esc_attr( $atts['caption_color'] ) . ';
1666	}
1667	#rl-gallery-container-' . $gallery_no . ' .rl-gallery .rl-gallery-link .rl-gallery-caption {
1668	font-size: ' . absint( $atts['caption_font_size'] ) . 'px;
1669	padding: ' . absint( $atts['caption_padding'] ) . 'px;
1670	}
1671	#rl-gallery-container-' . $gallery_no . ' .rl-gallery .rl-gallery-link .rl-gallery-caption,
1672	#rl-gallery-container-' . $gallery_no . ' .rl-gallery .rl-gallery-link:after {
1673	background-color: rgba( ' . esc_attr( $background_color ) . ', ' . esc_attr( $opacity ) . ' );
1674	}
1675	#rl-gallery-container-' . $gallery_no . ' [class^="rl-hover-icon-"] .rl-gallery-link:before,
1676	#rl-gallery-container-' . $gallery_no . ' [class*=" rl-hover-icon-"] .rl-gallery-link:before {
1677	color: ' . esc_attr( $atts['title_color'] ) . ';
1678	background-color: rgba( ' . esc_attr( $background_color ) . ', ' . esc_attr( $opacity ) . ' );
1679	}';
1680
1681	// load style data
1682	$style_loaded = wp_add_inline_style( 'responsive-lightbox-gallery', $style_data );
1683
1684	if ( ! $style_loaded )
1685	$this->style_data['gallery'] .= $style_data;
1686	}
1687	}
1688
1689	return $content;
1690	}
1691
1692	/**
1693	* Generate unique hash.
1694	*
1695	* @param int $length
1696	* @return string
1697	*/
1698	private function generate_hash( $length = 8 ) {
1699	$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
1700	$hash = '';
1701
1702	for( $i = 0; $i < $length; $i++ ) {
1703	$hash .= substr( $chars, mt_rand( 0, strlen( $chars ) - 1 ), 1 );
1704	}
1705
1706	return $hash;
1707	}
1708
1709	/**
1710	* Replace widget callback function.
1711	*
1712	* @global array $wp_registered_widgets
1713	*
1714	* @param array $sidebar_params
1715	* @return array
1716	*/
1717	public function dynamic_sidebar_params( $sidebar_params ) {
1718	if ( ( is_admin() && ! wp_doing_ajax() ) \|\| Responsive_Lightbox()->options['settings']['widgets'] !== true )
1719	return $sidebar_params;
1720
1721	global $wp_registered_widgets;
1722
1723	$widget_id = $sidebar_params[0]['widget_id'];
1724	$wp_registered_widgets[ $widget_id ]['original_callback'] = $wp_registered_widgets[ $widget_id ]['callback'];
1725	$wp_registered_widgets[ $widget_id ]['callback'] = [ $this, 'widget_callback_function' ];
1726
1727	return $sidebar_params;
1728	}
1729
1730	/**
1731	* Widget callback function.
1732	*
1733	* @global array $wp_registered_widgets
1734	*
1735	* @return void
1736	*/
1737	public function widget_callback_function() {
1738	global $wp_registered_widgets;
1739
1740	$original_callback_params = func_get_args();
1741	$widget_id = $original_callback_params[0]['widget_id'];
1742	$original_callback = $wp_registered_widgets[ $widget_id ]['original_callback'];
1743	$wp_registered_widgets[ $widget_id ]['callback'] = $original_callback;
1744	$widget_id_base = $wp_registered_widgets[ $widget_id ]['callback'][0]->id_base;
1745
1746	if ( is_callable( $original_callback ) ) {
1747	ob_start();
1748
1749	call_user_func_array( $original_callback, $original_callback_params );
1750
1751	$widget_output = ob_get_clean();
1752
1753	echo apply_filters( 'rl_widget_output', $widget_output, $widget_id_base, $widget_id );
1754	}
1755	}
1756
1757	/**
1758	* Filter widget output.
1759	*
1760	* @param string $content
1761	* @param string $widget_id_base
1762	* @param id $widget_id
1763	* @return string
1764	*/
1765	public function widget_output( $content, $widget_id_base, $widget_id ) {
1766	return wp_kses( $this->add_lightbox( $content ), $this->get_comment_lightbox_allowed_html() );
1767	}
1768
1769	/**
1770	* Get allowed HTML tags/attributes for filtered comment content.
1771	*
1772	* @return array
1773	*/
1774	private function get_comment_lightbox_allowed_html() {
1775	static $allowed = null;
1776
1777	if ( $allowed !== null )
1778	return $allowed;
1779
1780	$allowed = wp_kses_allowed_html( 'post' );
1781
1782	if ( ! is_array( $allowed ) )
1783	$allowed = [];
1784
1785	if ( ! isset( $allowed['a'] ) \|\| ! is_array( $allowed['a'] ) )
1786	$allowed['a'] = [];
1787
1788	foreach ( [ 'data-rel', 'data-rl_title', 'data-rl_caption', 'data-magnific_type', 'data-imagelightbox', 'data-lightbox-type', 'data-featherlight' ] as $attr )
1789	$allowed['a'][$attr] = true;
1790
1791	return $allowed;
1792	}
1793
1794	/**
1795	* Filter comment content.
1796	*
1797	* @param string $content
1798	* @return string
1799	*/
1800	public function get_comment_text( $content ) {
1801	if ( ( is_admin() && ! wp_doing_ajax() ) \|\| Responsive_Lightbox()->options['settings']['comments'] !== true )
1802	return $content;
1803
1804	return wp_kses( $this->add_lightbox( $content ), $this->get_comment_lightbox_allowed_html() );
1805	}
1806
1807	/**
1808	* Modify gallery container class.
1809	*
1810	* @param string $class
1811	* @param array $args
1812	* @param int $gallery_id
1813	* @return string
1814	*/
1815	public function gallery_container_class( $class, $args, $gallery_id ) {
1816	if ( $gallery_id ) {
1817	$class .= ' rl-loading';
1818
1819	if ( $args['pagination'] )
1820	$class .= ' rl-pagination-' . $args['pagination_type'];
1821	}
1822
1823	return $class;
1824	}
1825
1826	/**
1827	* Display content before the gallery.
1828	*
1829	* @param array $args
1830	* @param int $gallery_id
1831	* @return void
1832	*/
1833	public function before_gallery( $args, $gallery_id ) {
1834	if ( $gallery_id ) {
1835	// get current post id
1836	if ( isset( $_POST['action'], $_POST['post_id'] ) && $_POST['action'] === 'rl-get-gallery-page-content' && wp_doing_ajax() )
1837	$current_id = (int) $_POST['post_id'];
1838	else
1839	$current_id = (int) get_the_ID();
1840
1841	if ( isset( $args['gallery_title_position'] ) && $args['gallery_title_position'] === 'top' && get_post_type( $current_id ) )
1842	echo '<h4 class="rl-gallery-title">' . esc_html( get_the_title( $gallery_id ) ) . '</h4>';
1843
1844	if ( isset( $args['gallery_description_position'] ) && $args['gallery_description_position'] === 'top' )
1845	echo '<div class="rl-gallery-description">' . nl2br( esc_html( $args['gallery_description'] ) ) . '</div>';
1846	}
1847	}
1848
1849	/**
1850	* Display content after the gallery.
1851	*
1852	* @param array $args
1853	* @param int $gallery_id
1854	* @return void
1855	*/
1856	public function after_gallery( $args, $gallery_id ) {
1857	if ( $gallery_id ) {
1858	// get current post id
1859	if ( isset( $_POST['action'], $_POST['post_id'] ) && $_POST['action'] === 'rl-get-gallery-page-content' && wp_doing_ajax() )
1860	$current_id = (int) $_POST['post_id'];
1861	else
1862	$current_id = (int) get_the_ID();
1863
1864	if ( isset( $args['gallery_title_position'] ) && $args['gallery_title_position'] === 'bottom' )
1865	echo '<h4 class="rl-gallery-title">' . esc_html( get_the_title( $gallery_id ) ) . '</h4>';
1866
1867	if ( isset( $args['gallery_description_position'] ) && $args['gallery_description_position'] === 'bottom' )
1868	echo '<div class="rl-gallery-description">' . nl2br( esc_html( $args['gallery_description'] ) ) . '</div>';
1869	}
1870	}
1871
1872	/**
1873	* Add lightbox to Visual Composer shortcodes.
1874	*
1875	* @param string $content HTML content
1876	* @param string $shortcode Shortcode type
1877	* @return string
1878	*/
1879	public function vc_shortcode_content_filter_after( $content, $shortcode ) {
1880	if ( in_array( $shortcode, apply_filters( 'rl_lightbox_vc_allowed_shortcode', [ 'vc_gallery', 'vc_single_image', 'vc_images_carousel' ] ), true ) )
1881	$content = $this->add_lightbox( $content );
1882
1883	return $content;
1884	}
1885
1886	/**
1887	* Render Basic Grid gallery shortcode.
1888	*
1889	* @global object $post
1890	*
1891	* @param string $output HTML output
1892	* @param array $shortcode_atts Shortcode attributes
1893	* @return string
1894	*/
1895	public function basic_grid_gallery_shortcode( $output, $shortcode_atts ) {
1896	if ( ! empty( $output ) )
1897	return $output;
1898
1899	global $post;
1900
1901	$defaults = [
1902	'rl_gallery_id' => 0,
1903	'id' => isset( $post->ID ) ? (int) $post->ID : 0,
1904	'class' => '',
1905	'include' => '',
1906	'exclude' => '',
1907	'urls' => '',
1908	'type' => '',
1909	'order' => 'asc',
1910	'orderby' => 'menu_order',
1911	'size' => 'medium',
1912	'link' => 'file',
1913	'columns' => 3
1914	];
1915
1916	// get main instance
1917	$rl = Responsive_Lightbox();
1918
1919	if ( ! is_array( $shortcode_atts ) )
1920	$shortcode_atts = wp_parse_args( $shortcode_atts, $defaults );
1921
1922	// is there rl_gallery ID?
1923	$rl_gallery_id = $defaults['rl_gallery_id'] = ! empty( $shortcode_atts['rl_gallery_id'] ) ? (int) $shortcode_atts['rl_gallery_id'] : 0;
1924
1925	// is it rl gallery?
1926	$rl_gallery = $rl->options['builder']['gallery_builder'] && $rl_gallery_id && get_post_type( $rl_gallery_id ) === 'rl_gallery';
1927
1928	// private gallery?
1929	if ( $rl_gallery && get_post_status( $rl_gallery_id ) === 'private' && ! current_user_can( 'read_private_posts' ) )
1930	return '';
1931
1932	if ( ! array_key_exists( 'type', $shortcode_atts ) )
1933	$shortcode_atts['type'] = '';
1934
1935	// break if it is not basic grid gallery - first check
1936	if ( ! ( $shortcode_atts['type'] === 'basicgrid' \|\| ( $shortcode_atts['type'] === '' && ( ( $rl_gallery && $rl->options['settings']['builder_gallery'] === 'basicgrid' ) \|\| ( ! $rl_gallery && $rl->options['settings']['default_gallery'] === 'basicgrid' ) ) ) ) )
1937	return $output;
1938
1939	// get shortcode gallery fields combined with defaults
1940	$fields = rl_get_gallery_fields( 'basicgrid' );
1941
1942	// get gallery fields attributes
1943	$field_atts = rl_get_gallery_fields_atts( $fields, $shortcode_atts, $rl_gallery );
1944
1945	// is it rl gallery? add misc and lightbox fields
1946	if ( $rl_gallery ) {
1947	// get fields
1948	$fields_data = $rl->galleries->get_data( 'fields' );
1949
1950	$fields += $fields_data['lightbox']['options'] + $fields_data['misc']['options'];
1951	}
1952
1953	// get only valid arguments
1954	$atts = shortcode_atts( array_merge( $defaults, $field_atts ), $shortcode_atts, 'gallery' );
1955
1956	// sanitize gallery fields
1957	$atts = $this->sanitize_shortcode_args( $atts, $fields );
1958
1959	// break if it is not basic grid gallery
1960	if ( ! ( $atts['type'] === 'basicgrid' \|\| ( $atts['type'] === '' && ( ( $rl_gallery && $rl->options['settings']['builder_gallery'] === 'basicgrid' ) \|\| ( ! $rl_gallery && $rl->options['settings']['default_gallery'] === 'basicgrid' ) ) ) ) )
1961	return $output;
1962
1963	// ID
1964	$atts['id'] = (int) $atts['id'];
1965
1966	// add custom classes if needed
1967	if ( $rl_gallery )
1968	$atts['class'] .= ' ' . $atts['gallery_custom_class'];
1969
1970	// any classes?
1971	if ( $atts['class'] !== '' ) {
1972	$atts['class'] = trim( $atts['class'] );
1973
1974	// more than 1 class?
1975	if ( strpos( $atts['class'], ' ' ) !== false ) {
1976	// get unique valid HTML classes
1977	$atts['class'] = array_unique( array_filter( array_map( 'sanitize_html_class', explode( ' ', $atts['class'] ) ) ) );
1978
1979	if ( ! empty( $atts['class'] ) )
1980	$atts['class'] = implode( ' ', $atts['class'] );
1981	else
1982	$atts['class'] = '';
1983	// single class
1984	} else
1985	$atts['class'] = sanitize_html_class( $atts['class'] );
1986	}
1987
1988	// orderby
1989	if ( empty( $atts['orderby'] ) ) {
1990	$atts['orderby'] = sanitize_sql_orderby( $atts['orderby'] );
1991
1992	if ( empty( $atts['orderby'] ) )
1993	$atts['orderby'] = $defaults['orderby'];
1994	}
1995
1996	// order
1997	if ( strtolower( $atts['order'] ) === 'rand' )
1998	$atts['orderby'] = 'rand';
1999
2000	// check columns
2001	if ( $atts['columns_lg'] === 0 )
2002	$atts['columns_lg'] = $atts['columns'];
2003
2004	if ( $atts['columns_md'] === 0 )
2005	$atts['columns_md'] = $atts['columns'];
2006
2007	if ( $atts['columns_sm'] === 0 )
2008	$atts['columns_sm'] = $atts['columns'];
2009
2010	if ( $atts['columns_xs'] === 0 )
2011	$atts['columns_xs'] = $atts['columns'];
2012
2013	// gallery lightbox source size
2014	if ( ! empty( $atts['lightbox_image_size'] ) ) {
2015	if ( $atts['lightbox_image_size'] === 'global' )
2016	$atts['src_size'] = $rl->options['settings']['gallery_image_size'];
2017	elseif ( $atts['lightbox_image_size'] === 'lightbox_custom_size' && isset( $atts['lightbox_custom_size_width'], $atts['lightbox_custom_size_height'] ) )
2018	$atts['src_size'] = [ $atts['lightbox_custom_size_width'], $atts['lightbox_custom_size_height'] ];
2019	else
2020	$atts['src_size'] = $atts['lightbox_image_size'];
2021	} else
2022	$atts['src_size'] = $rl->options['settings']['gallery_image_size'];
2023
2024	// filter all shortcode arguments
2025	$atts = apply_filters( 'rl_gallery_shortcode_atts', $atts, $rl_gallery_id );
2026
2027	// get gallery images
2028	$images = rl_get_gallery_shortcode_images( $atts );
2029
2030	if ( empty( $images ) \|\| is_feed() \|\| defined( 'IS_HTML_EMAIL' ) )
2031	return $output;
2032
2033	// make sure it is integer
2034	$gallery_no = (int) $this->gallery_no;
2035
2036	ob_start();
2037
2038	// $gallery_no and $rl_gallery_id are both integers ?>
2039	<div class="rl-gallery-container <?php echo esc_attr( apply_filters( 'rl_gallery_container_class', '', $atts, $rl_gallery_id ) ); ?>" id="rl-gallery-container-<?php echo (int) $gallery_no; ?>" data-gallery_id="<?php echo (int) $rl_gallery_id; ?>">
2040
2041	<?php do_action( 'rl_before_gallery', $atts, $rl_gallery_id ); ?>
2042
2043	<div class="rl-gallery rl-basicgrid-gallery <?php echo esc_attr( $atts['class'] ); ?>" id="rl-gallery-<?php echo (int) $gallery_no; ?>" data-gallery_no="<?php echo (int) $gallery_no; ?>">
2044
2045	<?php foreach ( $images as $image ) {
2046	// $image['link'] is already escaped via get_gallery_image_link(), but we apply wp_kses_post() for defense-in-depth
2047	echo '<div class="rl-gallery-item">' . wp_kses_post( $image['link'] ) . '</div>';
2048	} ?>
2049
2050	</div>
2051
2052	<?php do_action( 'rl_after_gallery', $atts, $rl_gallery_id ); ?>
2053
2054	</div>
2055
2056	<?php $gallery_html = ob_get_contents();
2057
2058	ob_end_clean();
2059
2060	// styles
2061	wp_enqueue_style( 'responsive-lightbox-basicgrid-gallery', plugins_url( 'css/gallery-basicgrid.css', dirname( __FILE__ ) ), [], $rl->defaults['version'] );
2062
2063	// prepare style data
2064	$style_data = '
2065	#rl-gallery-container-' . $gallery_no . ' .rl-basicgrid-gallery .rl-gallery-item {
2066	width: calc(' . (string) round( 100 / (int) $atts['columns'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2067	margin: ' . (string) round( (int) $atts['gutter'] / 2, 2 ) . 'px;
2068	}
2069	@media all and (min-width: 1200px) {
2070	#rl-gallery-container-' . $gallery_no . ' .rl-basicgrid-gallery .rl-gallery-item {
2071	width: calc(' . (string) round( 100 / (int) $atts['columns_lg'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2072	}
2073	}
2074	@media all and (min-width: 992px) and (max-width: 1200px) {
2075	#rl-gallery-container-' . $gallery_no . ' .rl-basicgrid-gallery .rl-gallery-item {
2076	width: calc(' . (string) round( 100 / (int) $atts['columns_md'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2077	}
2078	}
2079	@media all and (min-width: 768px) and (max-width: 992px) {
2080	#rl-gallery-container-' . $gallery_no . ' .rl-basicgrid-gallery .rl-gallery-item {
2081	width: calc(' . (string) round( 100 / (int) $atts['columns_sm'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2082	}
2083	}
2084	@media all and (max-width: 768px) {
2085	#rl-gallery-container-' . $gallery_no . ' .rl-basicgrid-gallery .rl-gallery-item {
2086	width: calc(' . (string) round( 100 / (int) $atts['columns_xs'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2087	}
2088	}';
2089
2090	if ( $atts['force_height'] ) {
2091	$style_data .= '
2092	#rl-gallery-container-' . $gallery_no . ' .rl-basicgrid-gallery .rl-gallery-item {
2093	height: ' . (int) $atts['row_height'] . 'px;
2094	}
2095	#rl-gallery-container-' . $gallery_no . ' .rl-basicgrid-gallery .rl-gallery-item img {
2096	height: ' . (int) $atts['row_height'] . 'px;
2097	object-fit: cover;
2098	max-width: 100%;
2099	min-width: 100%;
2100	}';
2101	}
2102
2103	// load style data
2104	$style_loaded = wp_add_inline_style( 'responsive-lightbox-basicgrid-gallery', $style_data );
2105
2106	if ( ! $style_loaded )
2107	$this->style_data['basicgrid'] .= $style_data;
2108
2109	// remove any new lines from the output so that the reader parses it better
2110	return apply_filters( 'rl_gallery_shortcode_html', trim( preg_replace( '/\s+/', ' ', $gallery_html ) ), $atts, $rl_gallery_id );
2111	}
2112
2113	/**
2114	* Render Basic Slider gallery shortcode.
2115	*
2116	* @global object $post
2117	*
2118	* @param string $output HTML output
2119	* @param array $shortcode_atts Shortcode attributes
2120	* @return string
2121	*/
2122	public function basic_slider_gallery_shortcode( $output, $shortcode_atts ) {
2123	if ( ! empty( $output ) )
2124	return $output;
2125
2126	global $post;
2127
2128	$defaults = [
2129	'rl_gallery_id' => 0,
2130	'id' => isset( $post->ID ) ? (int) $post->ID : 0,
2131	'class' => '',
2132	'include' => '',
2133	'exclude' => '',
2134	'urls' => '',
2135	'type' => '',
2136	'order' => 'asc',
2137	'orderby' => 'menu_order',
2138	'size' => 'medium',
2139	'link' => 'file',
2140	'columns' => 3
2141	];
2142
2143	// get main instance
2144	$rl = Responsive_Lightbox();
2145
2146	if ( ! is_array( $shortcode_atts ) )
2147	$shortcode_atts = wp_parse_args( $shortcode_atts, $defaults );
2148
2149	// is there rl_gallery ID?
2150	$rl_gallery_id = $defaults['rl_gallery_id'] = ! empty( $shortcode_atts['rl_gallery_id'] ) ? (int) $shortcode_atts['rl_gallery_id'] : 0;
2151
2152	// is it rl gallery?
2153	$rl_gallery = $rl->options['builder']['gallery_builder'] && $rl_gallery_id && get_post_type( $rl_gallery_id ) === 'rl_gallery';
2154
2155	// private gallery?
2156	if ( $rl_gallery && get_post_status( $rl_gallery_id ) === 'private' && ! current_user_can( 'read_private_posts' ) )
2157	return '';
2158
2159	if ( ! array_key_exists( 'type', $shortcode_atts ) )
2160	$shortcode_atts['type'] = '';
2161
2162	// break if it is not basic slider gallery - first check
2163	if ( ! ( $shortcode_atts['type'] === 'basicslider' \|\| ( $shortcode_atts['type'] === '' && ( ( $rl_gallery && $rl->options['settings']['builder_gallery'] === 'basicslider' ) \|\| ( ! $rl_gallery && $rl->options['settings']['default_gallery'] === 'basicslider' ) ) ) ) )
2164	return $output;
2165
2166	// get shortcode gallery fields combined with defaults
2167	$fields = rl_get_gallery_fields( 'basicslider' );
2168
2169	// get gallery fields attributes
2170	$field_atts = rl_get_gallery_fields_atts( $fields, $shortcode_atts, $rl_gallery );
2171
2172	// is it rl gallery? add misc and lightbox fields
2173	if ( $rl_gallery ) {
2174	// get fields
2175	$fields_data = $rl->galleries->get_data( 'fields' );
2176
2177	$fields += $fields_data['lightbox']['options'] + $fields_data['misc']['options'];
2178	}
2179
2180	// get only valid arguments
2181	$atts = shortcode_atts( array_merge( $defaults, $field_atts ), $shortcode_atts, 'gallery' );
2182
2183	// sanitize gallery fields
2184	$atts = $this->sanitize_shortcode_args( $atts, $fields );
2185
2186	// break if it is not basic slider gallery
2187	if ( ! ( $atts['type'] === 'basicslider' \|\| ( $atts['type'] === '' && ( ( $rl_gallery && $rl->options['settings']['builder_gallery'] === 'basicslider' ) \|\| ( ! $rl_gallery && $rl->options['settings']['default_gallery'] === 'basicslider' ) ) ) ) )
2188	return $output;
2189
2190	// ID
2191	$atts['id'] = (int) $atts['id'];
2192
2193	// add custom classes if needed
2194	if ( $rl_gallery )
2195	$atts['class'] .= ' ' . $atts['gallery_custom_class'];
2196
2197	// any classes?
2198	if ( $atts['class'] !== '' ) {
2199	$atts['class'] = trim( $atts['class'] );
2200
2201	// more than 1 class?
2202	if ( strpos( $atts['class'], ' ' ) !== false ) {
2203	// get unique valid HTML classes
2204	$atts['class'] = array_unique( array_filter( array_map( 'sanitize_html_class', explode( ' ', $atts['class'] ) ) ) );
2205
2206	if ( ! empty( $atts['class'] ) )
2207	$atts['class'] = implode( ' ', $atts['class'] );
2208	else
2209	$atts['class'] = '';
2210	// single class
2211	} else
2212	$atts['class'] = sanitize_html_class( $atts['class'] );
2213	}
2214
2215	// orderby
2216	if ( empty( $atts['orderby'] ) ) {
2217	$atts['orderby'] = sanitize_sql_orderby( $atts['orderby'] );
2218
2219	if ( empty( $atts['orderby'] ) )
2220	$atts['orderby'] = $defaults['orderby'];
2221	}
2222
2223	// order
2224	if ( strtolower( $atts['order'] ) === 'rand' )
2225	$atts['orderby'] = 'rand';
2226
2227	// gallery lightbox source size
2228	if ( ! empty( $atts['lightbox_image_size'] ) ) {
2229	if ( $atts['lightbox_image_size'] === 'global' )
2230	$atts['src_size'] = $rl->options['settings']['gallery_image_size'];
2231	elseif ( $atts['lightbox_image_size'] === 'lightbox_custom_size' && isset( $atts['lightbox_custom_size_width'], $atts['lightbox_custom_size_height'] ) )
2232	$atts['src_size'] = [ $atts['lightbox_custom_size_width'], $atts['lightbox_custom_size_height'] ];
2233	else
2234	$atts['src_size'] = $atts['lightbox_image_size'];
2235	} else
2236	$atts['src_size'] = $rl->options['settings']['gallery_image_size'];
2237
2238	// filter all shortcode arguments
2239	$atts = apply_filters( 'rl_gallery_shortcode_atts', $atts, $rl_gallery_id );
2240
2241	// get gallery images
2242	$images = rl_get_gallery_shortcode_images( $atts );
2243
2244	if ( empty( $images ) \|\| is_feed() \|\| defined( 'IS_HTML_EMAIL' ) )
2245	return $output;
2246
2247	// make sure it is integer
2248	$gallery_no = (int) $this->gallery_no;
2249
2250	ob_start();
2251
2252	// $gallery_no and $rl_gallery_id are both integers ?>
2253	<div class="rl-gallery-container splide <?php echo esc_attr( apply_filters( 'rl_gallery_container_class', '', $atts, $rl_gallery_id ) ); ?>" id="rl-gallery-container-<?php echo (int) $gallery_no; ?>" data-gallery_id="<?php echo (int) $rl_gallery_id; ?>">
2254
2255	<?php do_action( 'rl_before_gallery', $atts, $rl_gallery_id ); ?>
2256
2257	<div class="rl-gallery rl-basicslider-gallery splide__track <?php echo esc_attr( $atts['class'] ); ?>" id="rl-gallery-<?php echo (int) $gallery_no; ?>" data-gallery_no="<?php echo (int) $gallery_no; ?>">
2258	<ul class="splide__list">
2259
2260	<?php foreach ( $images as $image ) {
2261	echo '
2262	<li class="rl-gallery-item splide__slide" ' . implode( ' ', apply_filters( 'rl_gallery_item_extra_args', [], $atts, $image ) ) . ' data-thumb="' . $image['thumbnail_url'] . '">
2263	' . wp_kses_post( $image['link'] ) . '
2264	</li>';
2265	} ?>
2266
2267	</ul>
2268	</div>
2269
2270	<?php do_action( 'rl_after_gallery', $atts, $rl_gallery_id ); ?>
2271
2272	</div>
2273
2274	<?php $gallery_html = ob_get_contents();
2275
2276	ob_end_clean();
2277
2278	// enqueue scripts and styles
2279	wp_enqueue_script( 'responsive-lightbox-basicslider-gallery' );
2280	wp_enqueue_style( 'responsive-lightbox-basicslider-gallery' );
2281
2282	// prepare style data
2283	$style_data = '
2284	#rl-gallery-container-' . $gallery_no . ' .rl-basicslider-gallery .rl-gallery-item img {
2285	width: 100%;
2286	height: auto;
2287	}';
2288
2289	// load style data
2290	$style_loaded = wp_add_inline_style( 'responsive-lightbox-basicslider-gallery', $style_data );
2291
2292	if ( ! $style_loaded )
2293	$this->style_data['basicslider'] .= $style_data;
2294
2295	// prepare script data
2296	$script_data = [
2297	'type' => $atts['slider_type'],
2298	'height' => ( $atts['height'] > 0 ? $atts['height'] . 'px' : 0 ),
2299	'width' => ( $atts['width'] > 0 ? $atts['width'] . '%' : 0 ),
2300	'speed' => $atts['speed'],
2301	'gap' => $atts['gap'] . 'px',
2302	'arrows' => $atts['arrows_navigation'],
2303	'pagination' => $atts['dots_navigation'],
2304	'drag' => $atts['drag'],
2305	'autoplay' => $atts['autoplay'],
2306	'interval' => $atts['interval'],
2307	'wheel' => $atts['wheel'],
2308	'perPage' => $atts['slides_per_page'],
2309	'perMove' => $atts['slides_per_move'],
2310	'start' => $atts['slides_start']
2311	];
2312
2313	// load script data
2314	$script_data = 'var rlArgsBasicSliderGallery' . ( $gallery_no + 1 ) . ' = ' . json_encode( $script_data ) . ";\n";
2315	$script_loaded = wp_add_inline_script( 'responsive-lightbox-basicslider-gallery', $script_data, 'before' );
2316
2317	if ( ! $script_loaded )
2318	$this->script_data['basicslider'] .= $script_data;
2319
2320	// remove any new lines from the output so that the reader parses it better
2321	return apply_filters( 'rl_gallery_shortcode_html', trim( preg_replace( '/\s+/', ' ', $gallery_html ) ), $atts, $rl_gallery_id );
2322	}
2323
2324	/**
2325	* Render Basic Masonry gallery shortcode.
2326	*
2327	* @global object $post
2328	*
2329	* @param string $output HTML output
2330	* @param array $shortcode_atts Shortcode attributes
2331	* @return string
2332	*/
2333	public function basic_masonry_gallery_shortcode( $output, $shortcode_atts ) {
2334	if ( ! empty( $output ) )
2335	return $output;
2336
2337	global $post;
2338
2339	$defaults = [
2340	'rl_gallery_id' => 0,
2341	'id' => isset( $post->ID ) ? (int) $post->ID : 0,
2342	'class' => '',
2343	'include' => '',
2344	'exclude' => '',
2345	'urls' => '',
2346	'type' => '',
2347	'order' => 'asc',
2348	'orderby' => 'menu_order',
2349	'size' => 'medium',
2350	'link' => 'file',
2351	'columns' => 3
2352	];
2353
2354	// get main instance
2355	$rl = Responsive_Lightbox();
2356
2357	if ( ! is_array( $shortcode_atts ) )
2358	$shortcode_atts = wp_parse_args( $shortcode_atts, $defaults );
2359
2360	// is there rl_gallery ID?
2361	$rl_gallery_id = $defaults['rl_gallery_id'] = ! empty( $shortcode_atts['rl_gallery_id'] ) ? (int) $shortcode_atts['rl_gallery_id'] : 0;
2362
2363	// is it rl gallery?
2364	$rl_gallery = $rl->options['builder']['gallery_builder'] && $rl_gallery_id && get_post_type( $rl_gallery_id ) === 'rl_gallery';
2365
2366	// private gallery?
2367	if ( $rl_gallery && get_post_status( $rl_gallery_id ) === 'private' && ! current_user_can( 'read_private_posts' ) )
2368	return '';
2369
2370	if ( ! array_key_exists( 'type', $shortcode_atts ) )
2371	$shortcode_atts['type'] = '';
2372
2373	// break if it is not basic masonry gallery - first check
2374	if ( ! ( $shortcode_atts['type'] === 'basicmasonry' \|\| ( $shortcode_atts['type'] === '' && ( ( $rl_gallery && $rl->options['settings']['builder_gallery'] === 'basicmasonry' ) \|\| ( ! $rl_gallery && $rl->options['settings']['default_gallery'] === 'basicmasonry' ) ) ) ) )
2375	return $output;
2376
2377	// get shortcode gallery fields combined with defaults
2378	$fields = rl_get_gallery_fields( 'basicmasonry' );
2379
2380	// get gallery fields attributes
2381	$field_atts = rl_get_gallery_fields_atts( $fields, $shortcode_atts, $rl_gallery );
2382
2383	// is it rl gallery? add misc and lightbox fields
2384	if ( $rl_gallery ) {
2385	// get fields
2386	$fields_data = $rl->galleries->get_data( 'fields' );
2387
2388	$fields += $fields_data['lightbox']['options'] + $fields_data['misc']['options'];
2389	}
2390
2391	// get only valid arguments
2392	$atts = shortcode_atts( array_merge( $defaults, $field_atts ), $shortcode_atts, 'gallery' );
2393
2394	// sanitize gallery fields
2395	$atts = $this->sanitize_shortcode_args( $atts, $fields );
2396
2397	// break if it is not basic masonry gallery
2398	if ( ! ( $atts['type'] === 'basicmasonry' \|\| ( $atts['type'] === '' && ( ( $rl_gallery && $rl->options['settings']['builder_gallery'] === 'basicmasonry' ) \|\| ( ! $rl_gallery && $rl->options['settings']['default_gallery'] === 'basicmasonry' ) ) ) ) )
2399	return $output;
2400
2401	// ID
2402	$atts['id'] = (int) $atts['id'];
2403
2404	// add custom classes if needed
2405	if ( $rl_gallery )
2406	$atts['class'] .= ' ' . $atts['gallery_custom_class'];
2407
2408	// any classes?
2409	if ( $atts['class'] !== '' ) {
2410	$atts['class'] = trim( $atts['class'] );
2411
2412	// more than 1 class?
2413	if ( strpos( $atts['class'], ' ' ) !== false ) {
2414	// get unique valid HTML classes
2415	$atts['class'] = array_unique( array_filter( array_map( 'sanitize_html_class', explode( ' ', $atts['class'] ) ) ) );
2416
2417	if ( ! empty( $atts['class'] ) )
2418	$atts['class'] = implode( ' ', $atts['class'] );
2419	else
2420	$atts['class'] = '';
2421	// single class
2422	} else
2423	$atts['class'] = sanitize_html_class( $atts['class'] );
2424	}
2425
2426	// orderby
2427	if ( empty( $atts['orderby'] ) ) {
2428	$atts['orderby'] = sanitize_sql_orderby( $atts['orderby'] );
2429
2430	if ( empty( $atts['orderby'] ) )
2431	$atts['orderby'] = $defaults['orderby'];
2432	}
2433
2434	// order
2435	if ( strtolower( $atts['order'] ) === 'rand' )
2436	$atts['orderby'] = 'rand';
2437
2438	// check columns
2439	if ( $atts['columns_lg'] === 0 )
2440	$atts['columns_lg'] = $atts['columns'];
2441
2442	if ( $atts['columns_md'] === 0 )
2443	$atts['columns_md'] = $atts['columns'];
2444
2445	if ( $atts['columns_sm'] === 0 )
2446	$atts['columns_sm'] = $atts['columns'];
2447
2448	if ( $atts['columns_xs'] === 0 )
2449	$atts['columns_xs'] = $atts['columns'];
2450
2451	// gallery lightbox source size
2452	if ( ! empty( $atts['lightbox_image_size'] ) ) {
2453	if ( $atts['lightbox_image_size'] === 'global' )
2454	$atts['src_size'] = $rl->options['settings']['gallery_image_size'];
2455	elseif ( $atts['lightbox_image_size'] === 'lightbox_custom_size' && isset( $atts['lightbox_custom_size_width'], $atts['lightbox_custom_size_height'] ) )
2456	$atts['src_size'] = [ $atts['lightbox_custom_size_width'], $atts['lightbox_custom_size_height'] ];
2457	else
2458	$atts['src_size'] = $atts['lightbox_image_size'];
2459	} else
2460	$atts['src_size'] = $rl->options['settings']['gallery_image_size'];
2461
2462	// filter all shortcode arguments
2463	$atts = apply_filters( 'rl_gallery_shortcode_atts', $atts, $rl_gallery_id );
2464
2465	// get gallery images
2466	$images = rl_get_gallery_shortcode_images( $atts );
2467
2468	if ( empty( $images ) \|\| is_feed() \|\| defined( 'IS_HTML_EMAIL' ) )
2469	return $output;
2470
2471	// make sure it is integer
2472	$gallery_no = (int) $this->gallery_no;
2473
2474	ob_start();
2475
2476	// $gallery_no and $rl_gallery_id are both integers ?>
2477	<div class="rl-gallery-container <?php echo esc_attr( apply_filters( 'rl_gallery_container_class', '', $atts, $rl_gallery_id ) ); ?>" id="rl-gallery-container-<?php echo (int) $gallery_no; ?>" data-gallery_id="<?php echo (int) $rl_gallery_id; ?>">
2478
2479	<?php do_action( 'rl_before_gallery', $atts, $rl_gallery_id ); ?>
2480
2481	<div class="rl-gallery rl-basicmasonry-gallery <?php echo esc_attr( $atts['class'] ); ?>" id="rl-gallery-<?php echo (int) $gallery_no; ?>" data-gallery_no="<?php echo (int) $gallery_no; ?>">
2482
2483	<?php
2484	$count = 0;
2485
2486	if ( $count === 0 )
2487	echo '<div class="rl-gutter-sizer"></div><div class="rl-grid-sizer"></div>';
2488
2489	foreach ( $images as $image ) {
2490	// $image['link'] is already escaped via get_gallery_image_link(), but we apply wp_kses_post() for defense-in-depth
2491	echo '
2492	<div class="rl-gallery-item' . ( $count === 0 ? ' rl-gallery-item-width-4' : '' ) . '" ' . implode( ' ', apply_filters( 'rl_gallery_item_extra_args', [], $atts, $image ) ) . '>
2493	<div class="rl-gallery-item-content">
2494	' . wp_kses_post( $image['link'] ) . '
2495	</div>
2496	</div>';
2497
2498	$count++;
2499	} ?>
2500
2501	</div>
2502
2503	<?php do_action( 'rl_after_gallery', $atts, $rl_gallery_id ); ?>
2504
2505	</div>
2506
2507	<?php $gallery_html = ob_get_contents();
2508
2509	ob_clean();
2510
2511	// enqueue scripts and styles
2512	wp_enqueue_script( 'responsive-lightbox-basicmasonry-gallery' );
2513	wp_enqueue_style( 'responsive-lightbox-basicmasonry-gallery' );
2514
2515	// prepare style data
2516	$style_data = '
2517	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery {
2518	margin: ' . -(string) round( (int) $atts['margin'] / 2, 1 ) . 'px ' . -(string) round( (int) $atts['gutter'] / 2, 1 ) . 'px;
2519	padding: ' . (int) $atts['margin'] . 'px 0;
2520	}
2521	#rl-gallery-container-' . $gallery_no . ' .rl-pagination-bottom {
2522	margin-top: ' . ( (int) $atts['margin'] / 2 ) . 'px
2523	}
2524	#rl-gallery-container-' . $gallery_no . ' .rl-pagination-top {
2525	margin-bottom: ' . ( (int) $atts['margin'] / 2 ) . 'px
2526	}
2527	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-gallery-item,
2528	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-grid-sizer {
2529	width: calc(' . (string) round( 100 / (int) $atts['columns'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2530	margin: ' . ( (int) $atts['margin'] / 2 ) . 'px ' . ( (int) $atts['gutter'] / 2 ) . 'px;
2531	}
2532	@media all and (min-width: 1200px) {
2533	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-gallery-item,
2534	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-grid-sizer {
2535	width: calc(' . (string) round( 100 / (int) $atts['columns_lg'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2536	margin: ' . ( (int) $atts['margin'] / 2 ) . 'px ' . ( (int) $atts['gutter'] / 2 ) . 'px;
2537	}
2538	}
2539	@media all and (min-width: 992px) and (max-width: 1200px) {
2540	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-gallery-item,
2541	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-grid-sizer {
2542	width: calc(' . (string) round( 100 / (int) $atts['columns_md'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2543	margin: ' . ( (int) $atts['margin'] / 2 ) . 'px ' . ( (int) $atts['gutter'] / 2 ) . 'px;
2544	}
2545	}
2546	@media all and (min-width: 768px) and (max-width: 992px) {
2547	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-gallery-item,
2548	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-grid-sizer {
2549	width: calc(' . (string) round( 100 / (int) $atts['columns_sm'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2550	margin: ' . ( (int) $atts['margin'] / 2 ) . 'px ' . ( (int) $atts['gutter'] / 2 ) . 'px;
2551	}
2552	}
2553	@media all and (max-width: 768px) {
2554	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-gallery-item,
2555	#rl-gallery-container-' . $gallery_no . ' .rl-basicmasonry-gallery .rl-grid-sizer {
2556	width: calc(' . (string) round( 100 / (int) $atts['columns_xs'], 2 ) . '% - ' . (int) $atts['gutter'] . 'px);
2557	margin: ' . ( (int) $atts['margin'] / 2 ) . 'px ' . ( (int) $atts['gutter'] / 2 ) . 'px;
2558	}
2559	}';
2560
2561	// load style data
2562	$style_loaded = wp_add_inline_style( 'responsive-lightbox-basicmasonry-gallery', $style_data );
2563
2564	if ( ! $style_loaded )
2565	$this->style_data['basicmasonry'] .= $style_data;
2566
2567	// prepare script data
2568	$script_data = [
2569	'originLeft' => $atts['origin_left'],
2570	'originTop' => $atts['origin_top']
2571	];
2572
2573	// load script data
2574	$script_data = 'var rlArgsBasicMasonryGallery' . ( $gallery_no + 1 ) . ' = ' . json_encode( $script_data ) . ";\n";
2575	$script_loaded = wp_add_inline_script( 'responsive-lightbox-basicmasonry-gallery', $script_data, 'before' );
2576
2577	if ( ! $script_loaded )
2578	$this->script_data['basicmasonry'] .= $script_data;
2579
2580	// remove any new lines from the output so that the reader parses it better
2581	return apply_filters( 'rl_gallery_shortcode_html', trim( preg_replace( '/\s+/', ' ', $gallery_html ) ), $atts, $rl_gallery_id );
2582	}
2583
2584	/**
2585	* Register frontend scripts.
2586	*
2587	* @return void
2588	*/
2589	public function wp_enqueue_scripts() {
2590	// get main instance
2591	$rl = Responsive_Lightbox();
2592
2593	// gallery style
2594	wp_register_style( 'responsive-lightbox-gallery', plugins_url( 'css/gallery.css', dirname( __FILE__ ) ), [], $rl->defaults['version'] );
2595
2596	// load style data?
2597	if ( ! empty( $this->style_data['gallery'] ) )
2598	wp_add_inline_style( 'responsive-lightbox-basicgrid-gallery', $this->style_data['gallery'] );
2599
2600	// Basic Grid
2601	// styles
2602	wp_register_style( 'responsive-lightbox-basicgrid-gallery', plugins_url( 'css/gallery-basicgrid.css', dirname( __FILE__ ) ), [], $rl->defaults['version'] );
2603
2604	// load style data?
2605	if ( ! empty( $this->style_data['basicgrid'] ) )
2606	wp_add_inline_style( 'responsive-lightbox-basicgrid-gallery', $this->style_data['basicgrid'] );
2607
2608	// Basic Slider
2609	// scripts
2610	wp_register_script( 'responsive-lightbox-basicslider', plugins_url( 'assets/splide/splide.min.js', dirname( __FILE__ ) ), [], '4.1.4', $rl->options['settings']['loading_place'] === 'footer' );
2611	wp_register_script( 'responsive-lightbox-basicslider-gallery', plugins_url( 'js/front-basicslider.js', dirname( __FILE__ ) ), [ 'jquery', 'responsive-lightbox-basicslider' ], $rl->defaults['version'], $rl->options['settings']['loading_place'] === 'footer' );
2612
2613	// load script data?
2614	if ( ! empty( $this->script_data['basicslider'] ) )
2615	wp_add_inline_script( 'responsive-lightbox-basicslider-gallery', $this->script_data['basicslider'], 'before' );
2616
2617	// styles
2618	wp_register_style( 'responsive-lightbox-basicslider-gallery', plugins_url( 'assets/splide/splide.min.css', dirname( __FILE__ ) ), [], '4.1.4' );
2619
2620	// load style data?
2621	if ( ! empty( $this->style_data['basicslider'] ) )
2622	wp_add_inline_style( 'responsive-lightbox-basicslider-gallery', $this->style_data['basicslider'] );
2623
2624	// Basic Masonry
2625	// scripts
2626	wp_register_script( 'responsive-lightbox-images-loaded', plugins_url( 'assets/imagesloaded/imagesloaded.pkgd' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', dirname( __FILE__ ) ), [ 'jquery' ], '5.0.0' );
2627	wp_register_script( 'responsive-lightbox-masonry', plugins_url( 'assets/masonry/masonry.pkgd' . ( ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.min' : '' ) . '.js', dirname( __FILE__ ) ), [ 'jquery' ], '4.2.2', $rl->options['settings']['loading_place'] === 'footer' );
2628	wp_register_script( 'responsive-lightbox-basicmasonry-gallery', plugins_url( 'js/front-basicmasonry.js', dirname( __FILE__ ) ), [ 'jquery', 'responsive-lightbox-masonry', 'responsive-lightbox-images-loaded' ], $rl->defaults['version'], ( $rl->options['settings']['loading_place'] === 'footer' ) );
2629
2630	// load script data?
2631	if ( ! empty( $this->script_data['basicmasonry'] ) )
2632	wp_add_inline_script( 'responsive-lightbox-basicmasonry-gallery', $this->script_data['basicmasonry'], 'before' );
2633
2634	// styles
2635	wp_register_style( 'responsive-lightbox-basicmasonry-gallery', plugins_url( 'css/gallery-basicmasonry.css', dirname( __FILE__ ) ), [], $rl->defaults['version'] );
2636
2637	// load style data?
2638	if ( ! empty( $this->style_data['basicmasonry'] ) )
2639	wp_add_inline_style( 'responsive-lightbox-basicmasonry-gallery', $this->style_data['basicmasonry'] );
2640	}
2641
2642	/**
2643	* Fetch remote image dimensions safely.
2644	*
2645	* @param string $url
2646	* @return array
2647	*/
2648	private function remote_image_size_lookup( $url ) {
2649	$args = [
2650	'timeout' => 5,
2651	'redirection' => 0,
2652	'reject_unsafe_urls' => true,
2653	'limit_response_size' => 1048576,
2654	'headers' => [ 'Accept' => 'image/*' ]
2655	];
2656
2657	$args = apply_filters( 'rl_remote_image_request_args', $args, $url );
2658	$max_redirects = absint( apply_filters( 'rl_remote_image_max_redirects', 3, $url ) );
2659	$current_url = $url;
2660
2661	for ( $redirects = 0; $redirects <= $max_redirects; $redirects++ ) {
2662	$response = wp_safe_remote_get( $current_url, $args );
2663
2664	if ( is_wp_error( $response ) )
2665	return [ 0, 0 ];
2666
2667	$status = wp_remote_retrieve_response_code( $response );
2668
2669	if ( in_array( $status, [ 301, 302, 303, 307, 308 ], true ) ) {
2670	$location = wp_remote_retrieve_header( $response, 'location' );
2671
2672	if ( empty( $location ) )
2673	return [ 0, 0 ];
2674
2675	if ( class_exists( 'WP_Http' ) )
2676	$location = WP_Http::make_absolute_url( $location, $current_url );
2677
2678	$next_url = $this->sanitize_remote_image_url( $location );
2679
2680	if ( empty( $next_url ) )
2681	return [ 0, 0 ];
2682
2683	$current_url = $next_url;
2684	continue;
2685	}
2686
2687	if ( $status < 200 \|\| $status >= 300 )
2688	return [ 0, 0 ];
2689
2690	$body = wp_remote_retrieve_body( $response );
2691
2692	if ( empty( $body ) )
2693	return [ 0, 0 ];
2694
2695	$dimensions = @getimagesizefromstring( $body );
2696
2697	if ( is_array( $dimensions ) && isset( $dimensions[0], $dimensions[1] ) )
2698	return [ absint( $dimensions[0] ), absint( $dimensions[1] ) ];
2699
2700	return [ 0, 0 ];
2701	}
2702
2703	return [ 0, 0 ];
2704	}
2705
2706	/**
2707	* Ensure the remote URL points to an allowed host.
2708	*
2709	* @param string $url
2710	* @return bool
2711	*/
2712	private function is_remote_image_url_allowed( $url ) {
2713	$parts = wp_parse_url( $url );
2714
2715	if ( empty( $parts['host'] ) )
2716	return false;
2717
2718	$host = strtolower( trim( $parts['host'], '[]' ) );
2719
2720	if ( in_array( $host, [ 'localhost', 'localhost.localdomain' ], true ) )
2721	return false;
2722
2723	if ( function_exists( 'idn_to_ascii' ) ) {
2724	$converted = defined( 'INTL_IDNA_VARIANT_UTS46' ) ? idn_to_ascii( $host, 0, INTL_IDNA_VARIANT_UTS46 ) : idn_to_ascii( $host );
2725
2726	if ( ! empty( $converted ) )
2727	$host = strtolower( $converted );
2728	}
2729
2730	$ips = $this->resolve_host_ips( $host );
2731
2732	if ( empty( $ips ) )
2733	return false;
2734
2735	foreach ( $ips as $ip ) {
2736	if ( $this->is_blocked_ip( $ip ) )
2737	return false;
2738	}
2739
2740	return true;
2741	}
2742
2743	/**
2744	* Resolve host into a list of IP addresses.
2745	*
2746	* @param string $host
2747	* @return array
2748	*/
2749	private function resolve_host_ips( $host ) {
2750	$host = trim( $host );
2751
2752	if ( $host === '' )
2753	return [];
2754
2755	if ( filter_var( $host, FILTER_VALIDATE_IP ) )
2756	return [ $host ];
2757
2758	$ips = [];
2759
2760	if ( function_exists( 'dns_get_record' ) && defined( 'DNS_A' ) ) {
2761	$dns_types = defined( 'DNS_A' ) ? DNS_A : 0;
2762
2763	if ( defined( 'DNS_AAAA' ) )
2764	$dns_types \|= DNS_AAAA;
2765
2766	if ( $dns_types > 0 ) {
2767	$records = @dns_get_record( $host, $dns_types );
2768
2769	if ( is_array( $records ) ) {
2770	foreach ( $records as $record ) {
2771	if ( ! empty( $record['ip'] ) )
2772	$ips[] = $record['ip'];
2773	elseif ( ! empty( $record['ipv6'] ) )
2774	$ips[] = $record['ipv6'];
2775	}
2776	}
2777	}
2778	}
2779
2780	if ( empty( $ips ) && function_exists( 'gethostbynamel' ) ) {
2781	$resolved = @gethostbynamel( $host );
2782
2783	if ( ! empty( $resolved ) )
2784	$ips = array_merge( $ips, $resolved );
2785	}
2786
2787	return array_unique( array_filter( $ips ) );
2788	}
2789
2790	/**
2791	* Check if an IP address belongs to a blocked range.
2792	*
2793	* @param string $ip
2794	* @return bool
2795	*/
2796	private function is_blocked_ip( $ip ) {
2797	$ip = trim( $ip );
2798
2799	if ( $ip === '' )
2800	return true;
2801
2802	if ( strpos( $ip, '%' ) !== false )
2803	list( $ip ) = explode( '%', $ip );
2804
2805	$flags = FILTER_FLAG_NO_PRIV_RANGE \| FILTER_FLAG_NO_RES_RANGE;
2806
2807	if ( filter_var( $ip, FILTER_VALIDATE_IP, $flags ) === false )
2808	return true;
2809
2810	if ( filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4 ) ) {
2811	if ( preg_match( '/^(169\.254\.\|100\.(6[4-9]\|[7-9]\d\|1[01]\d\|12[0-7])\.)/', $ip ) )
2812	return true;
2813	} elseif ( filter_var( $ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6 ) ) {
2814	$normalized = strtolower( $ip );
2815
2816	if ( $normalized === '::1' \|\| strpos( $normalized, 'fe80:' ) === 0 )
2817	return true;
2818	}
2819
2820	return false;
2821	}
2822	}
2823