class-wp-duotone-gutenberg.php in Gutenberg 23.2.0, at lib/class-wp-duotone-gutenberg.php

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1	<?php
2	/**
3	* WP_Duotone_Gutenberg class
4	*
5	* Parts of this source were derived and modified from colord,
6	* released under the MIT license.
7	*
8	* https://github.com/omgovich/colord
9	*
10	* Copyright (c) 2020 Vlad Shilov omgovich@ya.ru
11	*
12	* Permission is hereby granted, free of charge, to any person obtaining
13	* a copy of this software and associated documentation files (the
14	* "Software"), to deal in the Software without restriction, including
15	* without limitation the rights to use, copy, modify, merge, publish,
16	* distribute, sublicense, and/or sell copies of the Software, and to
17	* permit persons to whom the Software is furnished to do so, subject to
18	* the following conditions:
19	*
20	* The above copyright notice and this permission notice shall be
21	* included in all copies or substantial portions of the Software.
22	*
23	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25	* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
27	* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
28	* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
29	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30	*
31	* @package gutenberg
32	* @since 6.3.0
33	*/
34
35	/**
36	* Manages duotone block supports and global styles.
37	*
38	* @access public
39	*/
40	class WP_Duotone_Gutenberg {
41	/**
42	* Block names from global, theme, and custom styles that use duotone presets and the slug of
43	* the preset they are using.
44	*
45	* Example:
46	* [
47	* 'core/featured-image' => 'blue-orange',
48	* …
49	* ]
50	*
51	* @var ?array<string, string>
52	*/
53	private static $global_styles_block_names;
54
55	/**
56	* An array of duotone filter data from global, theme, and custom presets.
57	*
58	* Example:
59	* [
60	* 'wp-duotone-blue-orange' => [
61	* 'slug' => 'blue-orange',
62	* 'colors' => [ '#0000ff', '#ffcc00' ],
63	* ],
64	* 'wp-duotone-red-yellow' => [
65	* 'slug' => 'red-yellow',
66	* 'colors' => [ '#cc0000', '#ffff33' ],
67	* ],
68	* …
69	* ]
70	*
71	* @var ?array<string, array<string, string\|string[]>>
72	*/
73	private static $global_styles_presets;
74
75	/**
76	* All of the duotone filter data from presets for CSS custom properties on
77	* the page.
78	*
79	* Example:
80	* [
81	* 'wp-duotone-blue-orange' => [
82	* 'slug' => 'blue-orange',
83	* 'colors' => [ '#0000ff', '#ffcc00' ],
84	* ],
85	* …
86	* ]
87	*
88	* @var array
89	*/
90	private static $used_global_styles_presets = array();
91
92	/**
93	* All of the duotone filter data for SVGs on the page. Includes both
94	* presets and custom filters.
95	*
96	* Example:
97	* [
98	* 'wp-duotone-blue-orange' => [
99	* 'slug' => 'blue-orange',
100	* 'colors' => [ '#0000ff', '#ffcc00' ],
101	* ],
102	* 'wp-duotone-000000-ffffff-2' => [
103	* 'slug' => '000000-ffffff-2',
104	* 'colors' => [ '#000000', '#ffffff' ],
105	* ],
106	* …
107	* ]
108	*
109	* @var array
110	*/
111	private static $used_svg_filter_data = array();
112
113	/**
114	* All of the block CSS declarations for styles on the page.
115	*
116	* Example:
117	* [
118	* [
119	* 'selector' => '.wp-duotone-000000-ffffff-2.wp-block-image img',
120	* 'declarations' => [
121	* 'filter' => 'url(#wp-duotone-000000-ffffff-2)',
122	* ],
123	* ],
124	* …
125	* ]
126	*
127	* @var array
128	*/
129	private static $block_css_declarations = array();
130
131	/**
132	* Direct port of colord's clamp function. Using min/max instead of
133	* nested ternaries.
134	*
135	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L23
136	*
137	* @param float $number The number to clamp.
138	* @param float $min The minimum value.
139	* @param float $max The maximum value.
140	* @return float The clamped value.
141	*/
142	private static function colord_clamp( $number, $min = 0, $max = 1 ) {
143	return $number > $max ? $max : ( $number > $min ? $number : $min );
144	}
145
146	/**
147	* Direct port of colord's clampHue function.
148	*
149	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L32
150	*
151	* @param float $degrees The hue to clamp.
152	* @return float The clamped hue.
153	*/
154	private static function colord_clamp_hue( $degrees ) {
155	$degrees = is_finite( $degrees ) ? $degrees % 360 : 0;
156	return $degrees > 0 ? $degrees : $degrees + 360;
157	}
158
159	/**
160	* Direct port of colord's parseHue function.
161	*
162	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L40
163	*
164	* @param float $value The hue value to parse.
165	* @param string $unit The unit of the hue value.
166	* @return float The parsed hue value.
167	*/
168	private static function colord_parse_hue( $value, $unit = 'deg' ) {
169	$angle_units = array(
170	'grad' => 360 / 400,
171	'turn' => 360,
172	'rad' => 360 / ( M_PI * 2 ),
173	);
174
175	$factor = $angle_units[ $unit ];
176	if ( ! $factor ) {
177	$factor = 1;
178	}
179
180	return (float) $value * $factor;
181	}
182
183	/**
184	* Direct port of colord's parseHex function.
185	*
186	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hex.ts#L8
187	*
188	* @param string $hex The hex string to parse.
189	* @return array\|null An array of RGBA values or null if the hex string is invalid.
190	*/
191	private static function colord_parse_hex( $hex ) {
192	$is_match = preg_match(
193	'/^#([0-9a-f]{3,8})$/i',
194	$hex,
195	$hex_match
196	);
197
198	if ( ! $is_match ) {
199	return null;
200	}
201
202	$hex = $hex_match[1];
203
204	if ( 4 >= strlen( $hex ) ) {
205	return array(
206	'r' => (int) base_convert( $hex[0] . $hex[0], 16, 10 ),
207	'g' => (int) base_convert( $hex[1] . $hex[1], 16, 10 ),
208	'b' => (int) base_convert( $hex[2] . $hex[2], 16, 10 ),
209	'a' => 4 === strlen( $hex ) ? round( base_convert( $hex[3] . $hex[3], 16, 10 ) / 255, 2 ) : 1,
210	);
211	}
212
213	if ( 6 === strlen( $hex ) \|\| 8 === strlen( $hex ) ) {
214	return array(
215	'r' => (int) base_convert( substr( $hex, 0, 2 ), 16, 10 ),
216	'g' => (int) base_convert( substr( $hex, 2, 2 ), 16, 10 ),
217	'b' => (int) base_convert( substr( $hex, 4, 2 ), 16, 10 ),
218	'a' => 8 === strlen( $hex ) ? round( (int) base_convert( substr( $hex, 6, 2 ), 16, 10 ) / 255, 2 ) : 1,
219	);
220	}
221
222	return null;
223	}
224
225	/**
226	* Direct port of colord's clampRgba function.
227	*
228	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/rgb.ts#L5
229	*
230	* @param array $rgba The RGBA array to clamp.
231	* @return array The clamped RGBA array.
232	*/
233	private static function colord_clamp_rgba( $rgba ) {
234	$rgba['r'] = self::colord_clamp( $rgba['r'], 0, 255 );
235	$rgba['g'] = self::colord_clamp( $rgba['g'], 0, 255 );
236	$rgba['b'] = self::colord_clamp( $rgba['b'], 0, 255 );
237	$rgba['a'] = self::colord_clamp( $rgba['a'] );
238
239	return $rgba;
240	}
241
242	/**
243	* Direct port of colord's parseRgbaString function.
244	*
245	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/rgbString.ts#L18
246	*
247	* @param string $input The RGBA string to parse.
248	* @return array\|null An array of RGBA values or null if the RGB string is invalid.
249	*/
250	private static function colord_parse_rgba_string( $input ) {
251	// Functional syntax.
252	$is_match = preg_match(
253	'/^rgba?$\s([+-]?\d\.?\d+)(%)?\s,\s([+-]?\d\.?\d+)(%)?\s,\s([+-]?\d\.?\d+)(%)?\s(?:,\s([+-]?\d\.?\d+)(%)?\s)?$$/i',
254	$input,
255	$match
256	);
257
258	if ( ! $is_match ) {
259	// Whitespace syntax.
260	$is_match = preg_match(
261	'/^rgba?$\s([+-]?\d\.?\d+)(%)?\s+([+-]?\d\.?\d+)(%)?\s+([+-]?\d\.?\d+)(%)?\s(?:\/\s([+-]?\d\.?\d+)(%)?\s)?$$/i',
262	$input,
263	$match
264	);
265	}
266
267	if ( ! $is_match ) {
268	return null;
269	}
270
271	// For some reason, preg_match doesn't include empty matches at the end
272	// of the array, so we add them manually to make things easier later.
273	for ( $i = 1; $i <= 8; $i++ ) {
274	if ( ! isset( $match[ $i ] ) ) {
275	$match[ $i ] = '';
276	}
277	}
278
279	if ( $match[2] !== $match[4] \|\| $match[4] !== $match[6] ) {
280	return null;
281	}
282
283	return self::colord_clamp_rgba(
284	array(
285	'r' => (float) $match[1] / ( $match[2] ? 100 / 255 : 1 ),
286	'g' => (float) $match[3] / ( $match[4] ? 100 / 255 : 1 ),
287	'b' => (float) $match[5] / ( $match[6] ? 100 / 255 : 1 ),
288	'a' => '' === $match[7] ? 1 : (float) $match[7] / ( $match[8] ? 100 : 1 ),
289	)
290	);
291	}
292
293	/**
294	* Direct port of colord's clampHsla function.
295	*
296	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L6
297	*
298	* @param array $hsla The HSLA array to clamp.
299	* @return array The clamped HSLA array.
300	*/
301	private static function colord_clamp_hsla( $hsla ) {
302	$hsla['h'] = self::colord_clamp_hue( $hsla['h'] );
303	$hsla['s'] = self::colord_clamp( $hsla['s'], 0, 100 );
304	$hsla['l'] = self::colord_clamp( $hsla['l'], 0, 100 );
305	$hsla['a'] = self::colord_clamp( $hsla['a'] );
306
307	return $hsla;
308	}
309
310	/**
311	* Direct port of colord's hsvaToRgba function.
312	*
313	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsv.ts#L52
314	*
315	* @param array $hsva The HSVA array to convert.
316	* @return array The RGBA array.
317	*/
318	private static function colord_hsva_to_rgba( $hsva ) {
319	$h = ( $hsva['h'] / 360 ) * 6;
320	$s = $hsva['s'] / 100;
321	$v = $hsva['v'] / 100;
322	$a = $hsva['a'];
323
324	$hh = floor( $h );
325	$b = $v * ( 1 - $s );
326	$c = $v * ( 1 - ( $h - $hh ) * $s );
327	$d = $v * ( 1 - ( 1 - $h + $hh ) * $s );
328	$module = $hh % 6;
329
330	return array(
331	'r' => array( $v, $c, $b, $b, $d, $v )[ $module ] * 255,
332	'g' => array( $d, $v, $v, $c, $b, $b )[ $module ] * 255,
333	'b' => array( $b, $b, $d, $v, $v, $c )[ $module ] * 255,
334	'a' => $a,
335	);
336	}
337
338	/**
339	* Direct port of colord's hslaToHsva function.
340	*
341	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L33
342	*
343	* @param array $hsla The HSLA array to convert.
344	* @return array The HSVA array.
345	*/
346	private static function colord_hsla_to_hsva( $hsla ) {
347	$h = $hsla['h'];
348	$s = $hsla['s'];
349	$l = $hsla['l'];
350	$a = $hsla['a'];
351
352	$s *= ( $l < 50 ? $l : 100 - $l ) / 100;
353
354	return array(
355	'h' => $h,
356	's' => $s > 0 ? ( ( 2 * $s ) / ( $l + $s ) ) * 100 : 0,
357	'v' => $l + $s,
358	'a' => $a,
359	);
360	}
361
362	/**
363	* Direct port of colord's hslaToRgba function.
364	*
365	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hsl.ts#L55
366	*
367	* @param array $hsla The HSLA array to convert.
368	* @return array The RGBA array.
369	*/
370	private static function colord_hsla_to_rgba( $hsla ) {
371	return self::colord_hsva_to_rgba( self::colord_hsla_to_hsva( $hsla ) );
372	}
373
374	/**
375	* Direct port of colord's parseHslaString function.
376	*
377	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/colorModels/hslString.ts#L17
378	*
379	* @param string $input The HSLA string to parse.
380	* @return array\|null An array of RGBA values or null if the RGB string is invalid.
381	*/
382	private static function colord_parse_hsla_string( $input ) {
383	// Functional syntax.
384	$is_match = preg_match(
385	'/^hsla?$\s([+-]?\d\.?\d+)(deg\|rad\|grad\|turn)?\s,\s([+-]?\d\.?\d+)%\s,\s([+-]?\d\.?\d+)%\s(?:,\s([+-]?\d\.?\d+)(%)?\s)?$$/i',
386	$input,
387	$match
388	);
389
390	if ( ! $is_match ) {
391	// Whitespace syntax.
392	$is_match = preg_match(
393	'/^hsla?$\s([+-]?\d\.?\d+)(deg\|rad\|grad\|turn)?\s+([+-]?\d\.?\d+)%\s+([+-]?\d\.?\d+)%\s(?:\/\s([+-]?\d\.?\d+)(%)?\s)?$$/i',
394	$input,
395	$match
396	);
397	}
398
399	if ( ! $is_match ) {
400	return null;
401	}
402
403	// For some reason, preg_match doesn't include empty matches at the end
404	// of the array, so we add them manually to make things easier later.
405	for ( $i = 1; $i <= 6; $i++ ) {
406	if ( ! isset( $match[ $i ] ) ) {
407	$match[ $i ] = '';
408	}
409	}
410
411	$hsla = self::colord_clamp_hsla(
412	array(
413	'h' => self::colord_parse_hue( $match[1], $match[2] ),
414	's' => (float) $match[3],
415	'l' => (float) $match[4],
416	'a' => '' === $match[5] ? 1 : (float) $match[5] / ( $match[6] ? 100 : 1 ),
417	)
418	);
419
420	return self::colord_hsla_to_rgba( $hsla );
421	}
422
423	/**
424	* Direct port of colord's parse function simplified for our use case. This
425	* version only supports string parsing and only returns RGBA values.
426	*
427	* @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/parse.ts#L37
428	*
429	* @param string $input The string to parse.
430	* @return array\|null An array of RGBA values or null if the string is invalid.
431	*/
432	private static function colord_parse( $input ) {
433	$result = self::colord_parse_hex( $input );
434
435	if ( ! $result ) {
436	$result = self::colord_parse_rgba_string( $input );
437	}
438
439	if ( ! $result ) {
440	$result = self::colord_parse_hsla_string( $input );
441	}
442
443	return $result;
444	}
445
446	/**
447	* Take the inline CSS duotone variable from a block and return the slug. Handles styles slugs like:
448	* var:preset\|duotone\|blue-orange
449	* var(--wp--preset--duotone--blue-orange)
450	*
451	* @param string\|string[] $duotone_attr The duotone attribute from a block.
452	* @return string The slug of the duotone preset or an empty string if no slug is found (including when an array was passed).
453	*/
454	private static function get_slug_from_attribute( $duotone_attr ) {
455	if ( ! is_string( $duotone_attr ) ) {
456	return '';
457	}
458
459	// Uses Branch Reset Groups `(?\|…)` to return one capture group.
460	preg_match( '/(?\|var:preset\\|duotone\\|(\S+)\|var$--wp--preset--duotone--(\S+)$)/', $duotone_attr, $matches );
461
462	return ! empty( $matches[1] ) ? $matches[1] : '';
463	}
464
465	/**
466	* Check if we have a valid duotone preset.
467	*
468	* @param string\|string[] $duotone_attr The duotone attribute from a block.
469	* @return bool True if the duotone preset present and valid.
470	*/
471	private static function is_preset( $duotone_attr ) {
472	if ( ! is_string( $duotone_attr ) ) {
473	return false;
474	}
475
476	$slug = self::get_slug_from_attribute( $duotone_attr );
477	$filter_id = self::get_filter_id( $slug );
478
479	return array_key_exists( $filter_id, self::get_all_global_styles_presets() );
480	}
481
482	/**
483	* Get the CSS variable name for a duotone preset.
484	*
485	* @param string $slug The slug of the duotone preset.
486	* @return string The CSS variable name.
487	*/
488	private static function get_css_custom_property_name( $slug ) {
489	return "--wp--preset--duotone--$slug";
490	}
491
492	/**
493	* Get the ID of the duotone filter.
494	*
495	* @param string $slug The slug of the duotone preset.
496	* @return string The ID of the duotone filter.
497	*/
498	private static function get_filter_id( $slug ) {
499	return "wp-duotone-$slug";
500	}
501
502	/**
503	* Get the CSS variable for a duotone preset.
504	*
505	* @param string $slug The slug of the duotone preset.
506	* @return string The CSS variable.
507	*/
508	private static function get_css_var( $slug ) {
509	$name = self::get_css_custom_property_name( $slug );
510	return "var($name)";
511	}
512
513	/**
514	* Get the URL for a duotone filter.
515	*
516	* @param string $filter_id The ID of the filter.
517	* @return string The URL for the duotone filter.
518	*/
519	private static function get_filter_url( $filter_id ) {
520	return "url(#$filter_id)";
521	}
522
523	/**
524	* Gets the SVG for the duotone filter definition.
525	*
526	* @param string $filter_id The ID of the filter.
527	* @param array $colors An array of color strings.
528	* @return string An SVG with a duotone filter definition.
529	*/
530	private static function get_filter_svg( $filter_id, $colors ) {
531	$duotone_values = array(
532	'r' => array(),
533	'g' => array(),
534	'b' => array(),
535	'a' => array(),
536	);
537
538	foreach ( $colors as $color_str ) {
539	$color = self::colord_parse( $color_str );
540
541	if ( null === $color ) {
542	$error_message = sprintf(
543	/* translators: %s: duotone colors */
544	__( '"%s" in theme.json settings.color.duotone is not a hex or rgb string.', 'gutenberg' ),
545	$color_str
546	);
547	_doing_it_wrong( __METHOD__, $error_message, '6.3.0' );
548	} else {
549	$duotone_values['r'][] = $color['r'] / 255;
550	$duotone_values['g'][] = $color['g'] / 255;
551	$duotone_values['b'][] = $color['b'] / 255;
552	$duotone_values['a'][] = $color['a'];
553	}
554	}
555
556	ob_start();
557
558	?>
559
560	<svg
561	xmlns="http://www.w3.org/2000/svg"
562	viewBox="0 0 0 0"
563	width="0"
564	height="0"
565	focusable="false"
566	role="none"
567	style="visibility: hidden; position: absolute; left: -9999px; overflow: hidden;"
568	>
569	<defs>
570	<filter id="<?php echo esc_attr( $filter_id ); ?>">
571	<feColorMatrix
572	color-interpolation-filters="sRGB"
573	type="matrix"
574	values="
575	.299 .587 .114 0 0
576	.299 .587 .114 0 0
577	.299 .587 .114 0 0
578	.299 .587 .114 0 0
579	"
580	/>
581	<feComponentTransfer color-interpolation-filters="sRGB" >
582	<feFuncR type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['r'] ) ); ?>" />
583	<feFuncG type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['g'] ) ); ?>" />
584	<feFuncB type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['b'] ) ); ?>" />
585	<feFuncA type="table" tableValues="<?php echo esc_attr( implode( ' ', $duotone_values['a'] ) ); ?>" />
586	</feComponentTransfer>
587	<feComposite in2="SourceGraphic" operator="in" />
588	</filter>
589	</defs>
590	</svg>
591
592	<?php
593
594	$svg = ob_get_clean();
595
596	if ( ! SCRIPT_DEBUG ) {
597	// Clean up the whitespace.
598	$svg = preg_replace( "/[\r\n\t ]+/", ' ', $svg );
599	$svg = str_replace( '> <', '><', $svg );
600	$svg = trim( $svg );
601	}
602
603	return $svg;
604	}
605
606	/**
607	* Get the SVGs for the duotone filters.
608	*
609	* Example output:
610	* <svg><defs><filter id="wp-duotone-blue-orange">…</filter></defs></svg><svg>…</svg>
611	*
612	* @param array $sources The duotone presets.
613	* @return string The SVGs for the duotone filters.
614	*/
615	private static function get_svg_definitions( $sources ) {
616	$svgs = '';
617	foreach ( $sources as $filter_id => $filter_data ) {
618	$colors = $filter_data['colors'];
619	$svgs .= self::get_filter_svg( $filter_id, $colors );
620	}
621	return $svgs;
622	}
623
624	/**
625	* Get the CSS for global styles.
626	*
627	* Example output:
628	* body{--wp--preset--duotone--blue-orange:url('#wp-duotone-blue-orange');}
629	*
630	* @param array $sources The duotone presets.
631	* @return string The CSS for global styles.
632	*/
633	private static function get_global_styles_presets( $sources ) {
634	$css = WP_Theme_JSON_Gutenberg::ROOT_CSS_PROPERTIES_SELECTOR . '{';
635	foreach ( $sources as $filter_id => $filter_data ) {
636	$slug = $filter_data['slug'];
637	$colors = $filter_data['colors'];
638	$css_property_name = self::get_css_custom_property_name( $slug );
639	$declaration_value = is_string( $colors ) ? $colors : self::get_filter_url( $filter_id );
640	$css .= "$css_property_name:$declaration_value;";
641	}
642	$css .= '}';
643	return $css;
644	}
645
646	/**
647	* Get the CSS selector for a block type.
648	*
649	* @param WP_Block_Type $block_type Block type to check for support.
650	*
651	* @return string\|null The CSS selector. Null if there is no support or the $block_type is not a WP_Block_Type.
652	*/
653	private static function get_selector( $block_type ) {
654	if ( ! ( $block_type instanceof WP_Block_Type ) ) {
655	return null;
656	}
657
658	/*
659	* Backward compatibility with `supports.color.__experimentalDuotone`
660	* is provided via the `block_type_metadata_settings` filter. If
661	* `supports.filter.duotone` has not been set and the experimental
662	* property has been, the experimental property value is copied into
663	* `supports.filter.duotone`.
664	*/
665	$duotone_support = block_has_support( $block_type, array( 'filter', 'duotone' ) );
666	if ( ! $duotone_support ) {
667	return null;
668	}
669
670	/*
671	* If the experimental duotone support was set, that value is to be
672	* treated as a selector and requires scoping.
673	*/
674	$experimental_duotone = $block_type->supports['color']['__experimentalDuotone'] ?? false;
675	if ( $experimental_duotone ) {
676	$root_selector = wp_get_block_css_selector( $block_type );
677	return is_string( $experimental_duotone )
678	? WP_Theme_JSON::scope_selector( $root_selector, $experimental_duotone )
679	: $root_selector;
680	}
681
682	// Regular filter.duotone support uses filter.duotone selectors with fallbacks.
683	return wp_get_block_css_selector( $block_type, array( 'filter', 'duotone' ), true );
684	}
685
686	/**
687	* Enqueue a block CSS declaration for the page.
688	*
689	* @param string $filter_id The filter ID. e.g. 'wp-duotone-000000-ffffff-2'.
690	* @param string $duotone_selector The block's duotone selector. e.g. '.wp-block-image img'.
691	* @param string $filter_value The filter CSS value. e.g. 'url(#wp-duotone-000000-ffffff-2)' or 'unset'.
692	*/
693	private static function enqueue_block_css( $filter_id, $duotone_selector, $filter_value ) {
694	// Build the CSS selectors to which the filter will be applied.
695	$selectors = explode( ',', $duotone_selector );
696
697	$selectors_scoped = array();
698	foreach ( $selectors as $selector_part ) {
699	// Assuming the selector part is a subclass selector (not a tag name)
700	// so we can prepend the filter id class. If we want to support elements
701	// such as `img` or namespaces, we'll need to add a case for that here.
702	$selectors_scoped[] = '.' . $filter_id . trim( $selector_part );
703	}
704
705	$selector = implode( ', ', $selectors_scoped );
706
707	self::$block_css_declarations[] = array(
708	'selector' => $selector,
709	'declarations' => array(
710	'filter' => $filter_value,
711	),
712	);
713	}
714
715	/**
716	* Enqueue custom filter assets for the page. Includes an SVG filter and block CSS declaration.
717	*
718	* @param string $filter_id The filter ID. e.g. 'wp-duotone-000000-ffffff-2'.
719	* @param string $duotone_selector The block's duotone selector. e.g. '.wp-block-image img'.
720	* @param string $filter_value The filter CSS value. e.g. 'url(#wp-duotone-000000-ffffff-2)' or 'unset'.
721	* @param array $filter_data Duotone filter data with 'slug' and 'colors' keys.
722	*/
723	private static function enqueue_custom_filter( $filter_id, $duotone_selector, $filter_value, $filter_data ) {
724	self::$used_svg_filter_data[ $filter_id ] = $filter_data;
725	self::enqueue_block_css( $filter_id, $duotone_selector, $filter_value );
726	}
727
728	/**
729	* Enqueue preset assets for the page. Includes a CSS custom property, SVG filter, and block CSS declaration.
730	*
731	* @param string $filter_id The filter ID. e.g. 'wp-duotone-blue-orange'.
732	* @param string $duotone_selector The block's duotone selector. e.g. '.wp-block-image img'.
733	* @param string $filter_value The filter CSS value. e.g. 'url(#wp-duotone-blue-orange)' or 'unset'.
734	*/
735	private static function enqueue_global_styles_preset( $filter_id, $duotone_selector, $filter_value ) {
736	$global_styles_presets = self::get_all_global_styles_presets();
737	if ( ! array_key_exists( $filter_id, $global_styles_presets ) ) {
738	$error_message = sprintf(
739	/* translators: %s: duotone filter ID */
740	__( 'The duotone id "%s" is not registered in theme.json settings', 'gutenberg' ),
741	$filter_id
742	);
743	_doing_it_wrong( __METHOD__, $error_message, '6.3.0' );
744	return;
745	}
746	self::$used_global_styles_presets[ $filter_id ] = $global_styles_presets[ $filter_id ];
747	self::enqueue_custom_filter( $filter_id, $duotone_selector, $filter_value, $global_styles_presets[ $filter_id ] );
748	}
749
750	/**
751	* Registers the style and colors block attributes for block types that support it.
752	*
753	* @since 6.3.0
754	*
755	* @param WP_Block_Type $block_type Block Type.
756	*/
757	public static function register_duotone_support( $block_type ) {
758	// Previous `color.__experimentalDuotone` support flag is migrated
759	// to `filter.duotone` via `block_type_metadata_settings` filter.
760	if ( block_has_support( $block_type, array( 'filter', 'duotone' ), null ) ) {
761	if ( ! $block_type->attributes ) {
762	$block_type->attributes = array();
763	}
764
765	if ( ! array_key_exists( 'style', $block_type->attributes ) ) {
766	$block_type->attributes['style'] = array(
767	'type' => 'object',
768	);
769	}
770	}
771	}
772
773	/**
774	* Get all possible duotone presets from global and theme styles and store as slug => [ colors array ]
775	* We only want to process this one time. On block render we'll access and output only the needed presets for that page.
776	*
777	* @since 6.3.0
778	*
779	* @return array<string, array<string, string\|string[]>> An array of global styles presets, keyed on the filter ID.
780	*/
781	private static function get_all_global_styles_presets() {
782	if ( isset( self::$global_styles_presets ) ) {
783	return self::$global_styles_presets;
784	}
785
786	// Get the per block settings from the theme.json.
787	$tree = gutenberg_get_global_settings();
788	$presets_by_origin = $tree['color']['duotone'] ?? array();
789
790	self::$global_styles_presets = array();
791	foreach ( $presets_by_origin as $presets ) {
792	foreach ( $presets as $preset ) {
793	$filter_id = self::get_filter_id( _wp_to_kebab_case( $preset['slug'] ) );
794
795	self::$global_styles_presets[ $filter_id ] = $preset;
796	}
797	}
798
799	return self::$global_styles_presets;
800	}
801
802	/**
803	* Ensure all possible duotone presets are ready.
804	* This function is deprecated, as it's no longer necessary to handle this manually.
805	* It is kept to ensure external users of this method don't break.
806	*
807	* @since 6.3.0
808	* @deprecated
809	*/
810	public static function set_global_styles_presets() {
811	_deprecated_function( __METHOD__, 'Gutenberg 22.5.0' );
812	self::get_all_global_styles_presets();
813	}
814
815	/**
816	* Scrape all block names from global styles and store in self::$global_styles_block_names
817	*
818	* @since 6.3.0
819	*
820	* @return null\|array<string, string> An array of global style block slugs, keyed on the block name.
821	*/
822	private static function get_all_global_style_block_names() {
823	if ( isset( self::$global_styles_block_names ) ) {
824	return self::$global_styles_block_names;
825	}
826
827	// Get the per block settings from the theme.json.
828	$tree = WP_Theme_JSON_Resolver_Gutenberg::get_merged_data();
829	$block_nodes = $tree->get_styles_block_nodes();
830	$theme_json = $tree->get_raw_data();
831
832	self::$global_styles_block_names = array();
833
834	foreach ( $block_nodes as $block_node ) {
835	// This block definition doesn't include any duotone settings. Skip it.
836	if ( empty( $block_node['duotone'] ) ) {
837	continue;
838	}
839
840	// Value looks like this: 'var(--wp--preset--duotone--blue-orange)' or 'var:preset\|duotone\|blue-orange'.
841	$duotone_attr_path = array_merge( $block_node['path'], array( 'filter', 'duotone' ) );
842	$duotone_attr = _wp_array_get( $theme_json, $duotone_attr_path, array() );
843
844	if ( empty( $duotone_attr ) ) {
845	continue;
846	}
847	// If it has a duotone filter preset, save the block name and the preset slug.
848	// Only process if it's a string (preset reference), not an array (custom colors).
849	if ( ! is_string( $duotone_attr ) ) {
850	continue;
851	}
852
853	$slug = self::get_slug_from_attribute( $duotone_attr );
854
855	if ( $slug && $slug !== $duotone_attr ) {
856	self::$global_styles_block_names[ $block_node['name'] ] = $slug;
857	}
858	}
859
860	return self::$global_styles_block_names;
861	}
862
863	/**
864	* Ensure all possible global style block names are ready.
865	* This function is deprecated, as it's no longer necessary to handle this manually.
866	* It is kept to ensure external users of this method don't break.
867	*
868	* @since 6.3.0
869	* @deprecated
870	*/
871	public static function set_global_style_block_names() {
872	_deprecated_function( __METHOD__, 'Gutenberg 22.5.0' );
873	self::get_all_global_style_block_names();
874	}
875
876	/**
877	* Render out the duotone CSS styles and SVG.
878	*
879	* @since 6.3.0
880	*
881	* @param string $block_content Rendered block content.
882	* @param array $block Block object.
883	* @param WP_Block $wp_block The block instance.
884	* @return string Filtered block content.
885	*/
886	public static function render_duotone_support( $block_content, $block, $wp_block ) {
887	if ( ! $block['blockName'] ) {
888	return $block_content;
889	}
890	$duotone_selector = self::get_selector( $wp_block->block_type );
891
892	if ( ! $duotone_selector ) {
893	return $block_content;
894	}
895
896	$global_styles_block_names = self::get_all_global_style_block_names();
897
898	// The block should have a duotone attribute or have duotone defined in its theme.json to be processed.
899	$has_duotone_attribute = isset( $block['attrs']['style']['color']['duotone'] );
900	$has_global_styles_duotone = array_key_exists( $block['blockName'], $global_styles_block_names );
901
902	if ( ! $has_duotone_attribute && ! $has_global_styles_duotone ) {
903	return $block_content;
904	}
905
906	// Generate the pieces needed for rendering a duotone to the page.
907	if ( $has_duotone_attribute ) {
908
909	// Possible values for duotone attribute:
910	// 1. Array of colors - e.g. array('#000000', '#ffffff').
911	// 2. Variable for an existing Duotone preset - e.g. 'var:preset\|duotone\|blue-orange' or 'var(--wp--preset--duotone--blue-orange)''
912	// 3. A CSS string - e.g. 'unset' to remove globally applied duotone.
913
914	$duotone_attr = $block['attrs']['style']['color']['duotone'];
915	$is_preset = is_string( $duotone_attr ) && self::is_preset( $duotone_attr );
916	$is_css = is_string( $duotone_attr ) && ! $is_preset;
917	$is_custom = is_array( $duotone_attr );
918
919	if ( $is_preset ) {
920	$slug = self::get_slug_from_attribute( $duotone_attr ); // e.g. 'blue-orange'.
921	$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-blue-orange'.
922	$filter_value = self::get_css_var( $slug ); // e.g. 'var(--wp--preset--duotone--blue-orange)'.
923
924	// CSS custom property, SVG filter, and block CSS.
925	self::enqueue_global_styles_preset( $filter_id, $duotone_selector, $filter_value );
926
927	} elseif ( $is_css ) {
928	$slug = wp_unique_id( sanitize_key( $duotone_attr . '-' ) ); // e.g. 'unset-1'.
929	$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-unset-1'.
930	$filter_value = $duotone_attr; // e.g. 'unset'.
931
932	// Just block CSS.
933	self::enqueue_block_css( $filter_id, $duotone_selector, $filter_value );
934	} elseif ( $is_custom ) {
935	$slug = wp_unique_id( sanitize_key( implode( '-', $duotone_attr ) . '-' ) ); // e.g. '000000-ffffff-2'.
936	$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-000000-ffffff-2'.
937	$filter_value = self::get_filter_url( $filter_id ); // e.g. 'url(#wp-duotone-filter-000000-ffffff-2)'.
938	$filter_data = array(
939	'slug' => $slug,
940	'colors' => $duotone_attr,
941	);
942
943	// SVG filter and block CSS.
944	self::enqueue_custom_filter( $filter_id, $duotone_selector, $filter_value, $filter_data );
945	}
946	} elseif ( $has_global_styles_duotone ) {
947	$slug = $global_styles_block_names[ $block['blockName'] ]; // e.g. 'blue-orange'.
948	$filter_id = self::get_filter_id( $slug ); // e.g. 'wp-duotone-filter-blue-orange'.
949	$filter_value = self::get_css_var( $slug ); // e.g. 'var(--wp--preset--duotone--blue-orange)'.
950
951	// CSS custom property, SVG filter, and block CSS.
952	self::enqueue_global_styles_preset( $filter_id, $duotone_selector, $filter_value );
953	}
954
955	// Like the layout hook, this assumes the hook only applies to blocks with a single wrapper.
956	$tags = new WP_HTML_Tag_Processor( $block_content );
957	if ( $tags->next_tag() && isset( $filter_id ) ) {
958	$tags->add_class( $filter_id );
959	}
960
961	return $tags->get_updated_html();
962	}
963
964	/**
965	* Fixes the issue with our generated class name not being added to the block's outer container
966	* in classic themes due to gutenberg_restore_image_outer_container from layout block supports.
967	*
968	* @since 6.5.0
969	*
970	* @param string $block_content Rendered block content.
971	* @return string Filtered block content.
972	*/
973	public static function restore_image_outer_container( $block_content ) {
974	if ( wp_theme_has_theme_json() ) {
975	return $block_content;
976	}
977
978	$tags = new WP_HTML_Tag_Processor( $block_content );
979	$wrapper_query = array(
980	'tag_name' => 'div',
981	'class_name' => 'wp-block-image',
982	);
983	if ( ! $tags->next_tag( $wrapper_query ) ) {
984	return $block_content;
985	}
986
987	$tags->set_bookmark( 'wrapper-div' );
988	$tags->next_tag();
989
990	$inner_classnames = explode( ' ', $tags->get_attribute( 'class' ) );
991	foreach ( $inner_classnames as $classname ) {
992	if ( 0 === strpos( $classname, 'wp-duotone' ) ) {
993	$tags->remove_class( $classname );
994	$tags->seek( 'wrapper-div' );
995	$tags->add_class( $classname );
996	break;
997	}
998	}
999
1000	return $tags->get_updated_html();
1001	}
1002
1003	/**
1004	* Appends the used block duotone filter declarations to the inline block supports CSS.
1005	*
1006	* @since 6.3.0
1007	*/
1008	public static function output_block_styles() {
1009	if ( ! empty( self::$block_css_declarations ) ) {
1010	gutenberg_style_engine_get_stylesheet_from_css_rules(
1011	self::$block_css_declarations,
1012	array(
1013	'context' => 'block-supports',
1014	)
1015	);
1016	}
1017	}
1018
1019	/**
1020	* Appends the used global style duotone filter presets (CSS custom
1021	* properties) to the inline global styles CSS.
1022	*
1023	* @since 6.3.0
1024	*/
1025	public static function output_global_styles() {
1026	if ( ! empty( self::$used_global_styles_presets ) ) {
1027	wp_add_inline_style( 'global-styles', self::get_global_styles_presets( self::$used_global_styles_presets ) );
1028	}
1029	}
1030
1031	/**
1032	* Outputs all necessary SVG for duotone filters, CSS for classic themes.
1033	*
1034	* @since 6.3.0
1035	*/
1036	public static function output_footer_assets() {
1037	if ( ! empty( self::$used_svg_filter_data ) ) {
1038	echo self::get_svg_definitions( self::$used_svg_filter_data );
1039	}
1040
1041	// In block themes, the CSS is added in the head via wp_add_inline_style in the wp_enqueue_scripts action.
1042	if ( ! wp_is_block_theme() ) {
1043	$style_tag_id = 'core-block-supports-duotone';
1044	wp_register_style( $style_tag_id, false );
1045	if ( ! empty( self::$used_global_styles_presets ) ) {
1046	wp_add_inline_style( $style_tag_id, self::get_global_styles_presets( self::$used_global_styles_presets ) );
1047	}
1048	if ( ! empty( self::$block_css_declarations ) ) {
1049	wp_add_inline_style( $style_tag_id, gutenberg_style_engine_get_stylesheet_from_css_rules( self::$block_css_declarations ) );
1050	}
1051	wp_enqueue_style( $style_tag_id );
1052	}
1053	}
1054
1055	/**
1056	* Adds the duotone SVGs and CSS custom properties to the editor settings so
1057	* they can be pulled in by the EditorStyles component in JS and rendered in
1058	* the post editor.
1059	*
1060	* @since 6.3.0
1061	*
1062	* @param array $settings The block editor settings from the `block_editor_settings_all` filter.
1063	* @return array The editor settings with duotone SVGs and CSS custom properties.
1064	*/
1065	public static function add_editor_settings( $settings ) {
1066	$global_styles_presets = self::get_all_global_styles_presets();
1067	if ( ! empty( $global_styles_presets ) ) {
1068	if ( ! isset( $settings['styles'] ) ) {
1069	$settings['styles'] = array();
1070	}
1071
1072	$settings['styles'][] = array(
1073	// For the editor we can add all of the presets by default.
1074	'assets' => self::get_svg_definitions( $global_styles_presets ),
1075	// The 'svgs' type is new in 6.3 and requires the corresponding JS changes in the EditorStyles component to work.
1076	'__unstableType' => 'svgs',
1077	// These styles not generated by global styles, so this must be false or they will be stripped out in gutenberg_get_block_editor_settings.
1078	'isGlobalStyles' => false,
1079	);
1080
1081	$settings['styles'][] = array(
1082	// For the editor we can add all of the presets by default.
1083	'css' => self::get_global_styles_presets( $global_styles_presets ),
1084	// This must be set and must be something other than 'theme' or they will be stripped out in the post editor <Editor> component.
1085	'__unstableType' => 'presets',
1086	// These styles are no longer generated by global styles, so this must be false or they will be stripped out in gutenberg_get_block_editor_settings.
1087	'isGlobalStyles' => false,
1088	);
1089	}
1090
1091	return $settings;
1092	}
1093
1094	/**
1095	* Migrate the old experimental duotone support flag to its stabilized location
1096	* under `supports.filter.duotone` and sets.
1097	*
1098	* @since 6.3.0
1099	*
1100	* @param array $settings Current block type settings.
1101	* @param array $metadata Block metadata as read in via block.json.
1102	*
1103	* @return array Filtered block type settings.
1104	*/
1105	public static function migrate_experimental_duotone_support_flag( $settings, $metadata ) {
1106	$duotone_support = $metadata['supports']['color']['__experimentalDuotone'] ?? null;
1107
1108	if ( ! isset( $settings['supports']['filter']['duotone'] ) && null !== $duotone_support ) {
1109	_wp_array_set( $settings, array( 'supports', 'filter', 'duotone' ), (bool) $duotone_support );
1110	}
1111
1112	return $settings;
1113	}
1114
1115	/**
1116	* Returns the prefixed id for the duotone filter for use as a CSS id.
1117	*
1118	* Exported for the deprecated function gutenberg_get_duotone_filter_id().
1119	*
1120	* @since 6.3.0
1121	* @deprecated 6.3.0
1122	*
1123	* @param array $preset Duotone preset value as seen in theme.json.
1124	* @return string Duotone filter CSS id.
1125	*/
1126	public static function get_filter_id_from_preset( $preset ) {
1127	_deprecated_function( __FUNCTION__, '6.3.0' );
1128
1129	$filter_id = '';
1130	if ( isset( $preset['slug'] ) ) {
1131	$filter_id = self::get_filter_id( $preset['slug'] );
1132	}
1133	return $filter_id;
1134	}
1135
1136	/**
1137	* Gets the SVG for the duotone filter definition from a preset.
1138	*
1139	* Exported for the deprecated function gutenberg_get_duotone_filter_property().
1140	*
1141	* @since 6.3.0
1142	* @deprecated 6.3.0
1143	*
1144	* @param array $preset The duotone preset.
1145	* @return string The SVG for the filter definition.
1146	*/
1147	public static function get_filter_svg_from_preset( $preset ) {
1148	_deprecated_function( __FUNCTION__, '6.3.0' );
1149
1150	$filter_id = self::get_filter_id_from_preset( $preset );
1151	return self::get_filter_svg( $filter_id, $preset['colors'] );
1152	}
1153
1154	/**
1155	* Gets the CSS filter property value from a preset.
1156	*
1157	* Exported for the deprecated function gutenberg_get_duotone_filter_id().
1158	*
1159	* @since 6.3.0
1160	* @deprecated 6.3.0
1161	*
1162	* @param array $preset The duotone preset.
1163	* @return string The CSS filter property value.
1164	*/
1165	public static function get_filter_css_property_value_from_preset( $preset ) {
1166	_deprecated_function( __FUNCTION__, '6.3.0' );
1167
1168	if ( isset( $preset['colors'] ) && is_string( $preset['colors'] ) ) {
1169	return $preset['colors'];
1170	}
1171
1172	$filter_id = self::get_filter_id_from_preset( $preset );
1173	return 'url(#' . $filter_id . ')';
1174	}
1175	}
1176