gutenberg / lib / client-assets.php

client-assets.php in Gutenberg 10.3.0, at lib/client-assets.php

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1	<?php
2	/**
3	* Functions to register client-side assets (scripts and stylesheets) for the
4	* Gutenberg editor plugin.
5	*
6	* @package gutenberg
7	*/
8
9	if ( ! defined( 'ABSPATH' ) ) {
10	die( 'Silence is golden.' );
11	}
12
13	/**
14	* Retrieves the root plugin path.
15	*
16	* @return string Root path to the gutenberg plugin.
17	*
18	* @since 0.1.0
19	*/
20	function gutenberg_dir_path() {
21	return plugin_dir_path( __DIR__ );
22	}
23
24	/**
25	* Retrieves a URL to a file in the gutenberg plugin.
26	*
27	* @param string $path Relative path of the desired file.
28	*
29	* @return string Fully qualified URL pointing to the desired file.
30	*
31	* @since 0.1.0
32	*/
33	function gutenberg_url( $path ) {
34	return plugins_url( $path, __DIR__ );
35	}
36
37	/**
38	* Registers a script according to `wp_register_script`. Honors this request by
39	* reassigning internal dependency properties of any script handle already
40	* registered by that name. It does not deregister the original script, to
41	* avoid losing inline scripts which may have been attached.
42	*
43	* @since 4.1.0
44	*
45	* @param WP_Scripts $scripts WP_Scripts instance.
46	* @param string $handle Name of the script. Should be unique.
47	* @param string $src Full URL of the script, or path of the script relative to the WordPress root directory.
48	* @param array $deps Optional. An array of registered script handles this script depends on. Default empty array.
49	* @param string\|bool\|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
50	* as a query string for cache busting purposes. If version is set to false, a version
51	* number is automatically added equal to current installed WordPress version.
52	* If set to null, no version is added.
53	* @param bool $in_footer Optional. Whether to enqueue the script before </body> instead of in the <head>.
54	* Default 'false'.
55	*/
56	function gutenberg_override_script( $scripts, $handle, $src, $deps = array(), $ver = false, $in_footer = false ) {
57	$script = $scripts->query( $handle, 'registered' );
58	if ( $script ) {
59	/*
60	* In many ways, this is a reimplementation of `wp_register_script` but
61	* bypassing consideration of whether a script by the given handle had
62	* already been registered.
63	*/
64
65	// See: `_WP_Dependency::__construct` .
66	$script->src = $src;
67	$script->deps = $deps;
68	$script->ver = $ver;
69	$script->args = $in_footer;
70
71	/*
72	* The script's `group` designation is an indication of whether it is
73	* to be printed in the header or footer. The behavior here defers to
74	* the arguments as passed. Specifically, group data is not assigned
75	* for a script unless it is designated to be printed in the footer.
76	*/
77
78	// See: `wp_register_script` .
79	unset( $script->extra['group'] );
80	if ( $in_footer ) {
81	$script->add_data( 'group', 1 );
82	}
83	} else {
84	$scripts->add( $handle, $src, $deps, $ver, $in_footer );
85	}
86
87	/*
88	* `WP_Dependencies::set_translations` will fall over on itself if setting
89	* translations on the `wp-i18n` handle, since it internally adds `wp-i18n`
90	* as a dependency of itself, exhausting memory. The same applies for the
91	* polyfill and hooks scripts, which are dependencies _of_ `wp-i18n`.
92	*
93	* See: https://core.trac.wordpress.org/ticket/46089
94	*/
95	if ( ! in_array( $handle, array( 'wp-i18n', 'wp-polyfill', 'wp-hooks' ), true ) ) {
96	$scripts->set_translations( $handle, 'default' );
97	}
98
99	// Remove this check once the minimum supported WordPress version is at least 5.7.
100	if ( 'wp-i18n' === $handle ) {
101	$ltr = 'rtl' === _x( 'ltr', 'text direction', 'default' ) ? 'rtl' : 'ltr';
102	$output = sprintf( "wp.i18n.setLocaleData( { 'text direction\u0004ltr': [ '%s' ] }, 'default' );", $ltr );
103	$scripts->add_inline_script( 'wp-i18n', $output, 'after' );
104	}
105	}
106
107	/**
108	* Filters the default translation file load behavior to load the Gutenberg
109	* plugin translation file, if available.
110	*
111	* @param string\|false $file Path to the translation file to load. False if
112	* there isn't one.
113	* @param string $handle Name of the script to register a translation
114	* domain to.
115	*
116	* @return string\|false Filtered path to the Gutenberg translation file, if
117	* available.
118	*/
119	function gutenberg_override_translation_file( $file, $handle ) {
120	if ( ! $file ) {
121	return $file;
122	}
123
124	// Ignore scripts whose handle does not have the "wp-" prefix.
125	if ( 'wp-' !== substr( $handle, 0, 3 ) ) {
126	return $file;
127	}
128
129	// Ignore scripts that are not found in the expected `build/` location.
130	$script_path = gutenberg_dir_path() . 'build/' . substr( $handle, 3 ) . '/index.js';
131	if ( ! file_exists( $script_path ) ) {
132	return $file;
133	}
134
135	/*
136	* The default file will be in the plugins language directory, omitting the
137	* domain since Gutenberg assigns the script translations as the default.
138	*
139	* Example: /www/wp-content/languages/plugins/de_DE-07d88e6a803e01276b9bfcc1203e862e.json
140	*
141	* The logic of `load_script_textdomain` is such that it will assume to
142	* search in the plugins language directory, since the assigned source of
143	* the overridden Gutenberg script originates in the plugins directory.
144	*
145	* The plugin translation files each begin with the slug of the plugin, so
146	* it's a simple matter of prepending the Gutenberg plugin slug.
147	*/
148	$path_parts = pathinfo( $file );
149	$plugin_translation_file = (
150	$path_parts['dirname'] .
151	'/gutenberg-' .
152	$path_parts['basename']
153	);
154
155	return $plugin_translation_file;
156	}
157	add_filter( 'load_script_translation_file', 'gutenberg_override_translation_file', 10, 2 );
158
159	/**
160	* Registers a style according to `wp_register_style`. Honors this request by
161	* deregistering any style by the same handler before registration.
162	*
163	* @since 4.1.0
164	*
165	* @param WP_Styles $styles WP_Styles instance.
166	* @param string $handle Name of the stylesheet. Should be unique.
167	* @param string $src Full URL of the stylesheet, or path of the stylesheet relative to the WordPress root directory.
168	* @param array $deps Optional. An array of registered stylesheet handles this stylesheet depends on. Default empty array.
169	* @param string\|bool\|null $ver Optional. String specifying stylesheet version number, if it has one, which is added to the URL
170	* as a query string for cache busting purposes. If version is set to false, a version
171	* number is automatically added equal to current installed WordPress version.
172	* If set to null, no version is added.
173	* @param string $media Optional. The media for which this stylesheet has been defined.
174	* Default 'all'. Accepts media types like 'all', 'print' and 'screen', or media queries like
175	* '(orientation: portrait)' and '(max-width: 640px)'.
176	*/
177	function gutenberg_override_style( $styles, $handle, $src, $deps = array(), $ver = false, $media = 'all' ) {
178	$style = $styles->query( $handle, 'registered' );
179	if ( $style ) {
180	$styles->remove( $handle );
181	}
182	$styles->add( $handle, $src, $deps, $ver, $media );
183	}
184
185	/**
186	* Registers vendor JavaScript files to be used as dependencies of the editor
187	* and plugins.
188	*
189	* This function is called from a script during the plugin build process, so it
190	* should not call any WordPress PHP functions.
191	*
192	* @since 0.1.0
193	*
194	* @param WP_Scripts $scripts WP_Scripts instance.
195	*/
196	function gutenberg_register_vendor_scripts( $scripts ) {
197	$suffix = SCRIPT_DEBUG ? '' : '.min';
198
199	$react_suffix = ( SCRIPT_DEBUG ? '.development' : '.production' ) . $suffix;
200	gutenberg_register_vendor_script(
201	$scripts,
202	'react',
203	'https://unpkg.com/react@16.13.1/umd/react' . $react_suffix . '.js',
204	array( 'wp-polyfill' )
205	);
206	gutenberg_register_vendor_script(
207	$scripts,
208	'react-dom',
209	'https://unpkg.com/react-dom@16.13.1/umd/react-dom' . $react_suffix . '.js',
210	array( 'react' )
211	);
212
213	/*
214	* This script registration and the corresponding function should be removed
215	* removed once the plugin is updated to support WordPress 5.7.0 and newer.
216	*/
217	gutenberg_register_vendor_script(
218	$scripts,
219	'object-fit-polyfill',
220	'https://unpkg.com/objectFitPolyfill@2.3.0/dist/objectFitPolyfill.min.js',
221	array(),
222	'2.3.0'
223	);
224	}
225	add_action( 'wp_default_scripts', 'gutenberg_register_vendor_scripts' );
226
227	/**
228	* Registers all the WordPress packages scripts that are in the standardized
229	* `build/` location.
230	*
231	* @since 4.5.0
232	*
233	* @param WP_Scripts $scripts WP_Scripts instance.
234	*/
235	function gutenberg_register_packages_scripts( $scripts ) {
236	// When in production, use the plugin's version as the default asset version;
237	// else (for development or test) default to use the current time.
238	$default_version = defined( 'GUTENBERG_VERSION' ) && ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? GUTENBERG_VERSION : time();
239
240	foreach ( glob( gutenberg_dir_path() . 'build/*/index.js' ) as $path ) {
241	// Prefix `wp-` to package directory to get script handle.
242	// For example, `…/build/a11y/index.js` becomes `wp-a11y`.
243	$handle = 'wp-' . basename( dirname( $path ) );
244
245	// Replace `.js` extension with `.asset.php` to find the generated dependencies file.
246	$asset_file = substr( $path, 0, -3 ) . '.asset.php';
247	$asset = file_exists( $asset_file )
248	? require( $asset_file )
249	: null;
250	$dependencies = isset( $asset['dependencies'] ) ? $asset['dependencies'] : array();
251	$version = isset( $asset['version'] ) ? $asset['version'] : $default_version;
252
253	// Add dependencies that cannot be detected and generated by build tools.
254	switch ( $handle ) {
255	case 'wp-block-library':
256	array_push( $dependencies, 'editor' );
257	break;
258
259	case 'wp-edit-post':
260	array_push( $dependencies, 'media-models', 'media-views', 'postbox' );
261	break;
262
263	case 'wp-edit-site':
264	array_push( $dependencies, 'wp-dom-ready' );
265	break;
266	}
267
268	// Get the path from Gutenberg directory as expected by `gutenberg_url`.
269	$gutenberg_path = substr( $path, strlen( gutenberg_dir_path() ) );
270
271	gutenberg_override_script(
272	$scripts,
273	$handle,
274	gutenberg_url( $gutenberg_path ),
275	$dependencies,
276	$version,
277	true
278	);
279	}
280	}
281	add_action( 'wp_default_scripts', 'gutenberg_register_packages_scripts' );
282
283	/**
284	* Registers all the WordPress packages styles that are in the standardized
285	* `build/` location.
286	*
287	* @since 6.7.0
288
289	* @param WP_Styles $styles WP_Styles instance.
290	*/
291	function gutenberg_register_packages_styles( $styles ) {
292	// When in production, use the plugin's version as the asset version;
293	// else (for development or test) default to use the current time.
294	$version = defined( 'GUTENBERG_VERSION' ) && ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? GUTENBERG_VERSION : time();
295
296	// Editor Styles.
297	gutenberg_override_style(
298	$styles,
299	'wp-block-editor',
300	gutenberg_url( 'build/block-editor/style.css' ),
301	array( 'wp-components' ),
302	$version
303	);
304	$styles->add_data( 'wp-block-editor', 'rtl', 'replace' );
305
306	gutenberg_override_style(
307	$styles,
308	'wp-editor',
309	gutenberg_url( 'build/editor/style.css' ),
310	array( 'wp-components', 'wp-block-editor', 'wp-nux', 'wp-reusable-blocks' ),
311	$version
312	);
313	$styles->add_data( 'wp-editor', 'rtl', 'replace' );
314
315	gutenberg_override_style(
316	$styles,
317	'wp-edit-post',
318	gutenberg_url( 'build/edit-post/style.css' ),
319	array( 'wp-components', 'wp-block-editor', 'wp-editor', 'wp-edit-blocks', 'wp-block-library', 'wp-nux' ),
320	$version
321	);
322	$styles->add_data( 'wp-edit-post', 'rtl', 'replace' );
323
324	gutenberg_override_style(
325	$styles,
326	'wp-components',
327	gutenberg_url( 'build/components/style.css' ),
328	array( 'dashicons' ),
329	$version
330	);
331	$styles->add_data( 'wp-components', 'rtl', 'replace' );
332
333	$block_library_filename = gutenberg_should_load_separate_block_assets() ? 'common' : 'style';
334	gutenberg_override_style(
335	$styles,
336	'wp-block-library',
337	gutenberg_url( 'build/block-library/' . $block_library_filename . '.css' ),
338	array(),
339	$version
340	);
341	$styles->add_data( 'wp-block-library', 'rtl', 'replace' );
342	$styles->add_data( 'wp-block-library', 'path', gutenberg_dir_path() . 'build/block-library/' . $block_library_filename . '.css' );
343
344	gutenberg_override_style(
345	$styles,
346	'wp-format-library',
347	gutenberg_url( 'build/format-library/style.css' ),
348	array( 'wp-block-editor', 'wp-components' ),
349	$version
350	);
351	$styles->add_data( 'wp-format-library', 'rtl', 'replace' );
352
353	$wp_edit_blocks_dependencies = array(
354	'wp-components',
355	'wp-editor',
356	// This need to be added before the block library styles,
357	// The block library styles override the "reset" styles.
358	'wp-reset-editor-styles',
359	'wp-block-library',
360	'wp-reusable-blocks',
361	);
362
363	global $editor_styles;
364	if ( ! is_array( $editor_styles ) \|\| count( $editor_styles ) === 0 ) {
365	// Include opinionated block styles if no $editor_styles are declared, so the editor never appears broken.
366	$wp_edit_blocks_dependencies[] = 'wp-block-library-theme';
367	}
368
369	gutenberg_override_style(
370	$styles,
371	'wp-reset-editor-styles',
372	gutenberg_url( 'build/block-library/reset.css' ),
373	array(),
374	$version
375	);
376	$styles->add_data( 'wp-reset-editor-styles', 'rtl', 'replace' );
377
378	gutenberg_override_style(
379	$styles,
380	'wp-edit-blocks',
381	gutenberg_url( 'build/block-library/editor.css' ),
382	$wp_edit_blocks_dependencies,
383	$version
384	);
385	$styles->add_data( 'wp-edit-blocks', 'rtl', 'replace' );
386
387	gutenberg_override_style(
388	$styles,
389	'wp-nux',
390	gutenberg_url( 'build/nux/style.css' ),
391	array( 'wp-components' ),
392	$version
393	);
394	$styles->add_data( 'wp-nux', 'rtl', 'replace' );
395
396	gutenberg_override_style(
397	$styles,
398	'wp-block-library-theme',
399	gutenberg_url( 'build/block-library/theme.css' ),
400	array(),
401	$version
402	);
403	$styles->add_data( 'wp-block-library-theme', 'rtl', 'replace' );
404
405	gutenberg_override_style(
406	$styles,
407	'wp-list-reusable-blocks',
408	gutenberg_url( 'build/list-reusable-blocks/style.css' ),
409	array( 'wp-components' ),
410	$version
411	);
412	$styles->add_data( 'wp-list-reusable-block', 'rtl', 'replace' );
413
414	gutenberg_override_style(
415	$styles,
416	'wp-edit-navigation',
417	gutenberg_url( 'build/edit-navigation/style.css' ),
418	array( 'wp-components', 'wp-block-editor', 'wp-edit-blocks' ),
419	$version
420	);
421	$styles->add_data( 'wp-edit-navigation', 'rtl', 'replace' );
422
423	gutenberg_override_style(
424	$styles,
425	'wp-edit-site',
426	gutenberg_url( 'build/edit-site/style.css' ),
427	array( 'wp-components', 'wp-block-editor', 'wp-edit-blocks' ),
428	$version
429	);
430	$styles->add_data( 'wp-edit-site', 'rtl', 'replace' );
431
432	gutenberg_override_style(
433	$styles,
434	'wp-edit-widgets',
435	gutenberg_url( 'build/edit-widgets/style.css' ),
436	array( 'wp-components', 'wp-block-editor', 'wp-edit-blocks', 'wp-reusable-blocks' ),
437	$version
438	);
439	$styles->add_data( 'wp-edit-widgets', 'rtl', 'replace' );
440
441	gutenberg_override_style(
442	$styles,
443	'wp-block-directory',
444	gutenberg_url( 'build/block-directory/style.css' ),
445	array( 'wp-block-editor', 'wp-components' ),
446	$version
447	);
448	$styles->add_data( 'wp-block-directory', 'rtl', 'replace' );
449
450	gutenberg_override_style(
451	$styles,
452	'wp-customize-widgets',
453	gutenberg_url( 'build/customize-widgets/style.css' ),
454	array( 'wp-components', 'wp-block-editor', 'wp-edit-blocks' ),
455	$version
456	);
457	$styles->add_data( 'wp-customize-widgets', 'rtl', 'replace' );
458
459	gutenberg_override_style(
460	$styles,
461	'wp-reusable-blocks',
462	gutenberg_url( 'build/reusable-blocks/style.css' ),
463	array( 'wp-components' ),
464	$version
465	);
466	$styles->add_data( 'wp-reusable-block', 'rtl', 'replace' );
467	}
468	add_action( 'wp_default_styles', 'gutenberg_register_packages_styles' );
469
470	/**
471	* Registers common scripts and styles to be used as dependencies of the editor
472	* and plugins.
473	*
474	* @since 0.1.0
475	*/
476	function gutenberg_enqueue_block_editor_assets() {
477	if ( defined( 'GUTENBERG_LIVE_RELOAD' ) && GUTENBERG_LIVE_RELOAD ) {
478	$live_reload_url = ( GUTENBERG_LIVE_RELOAD === true ) ? 'http://localhost:35729/livereload.js' : GUTENBERG_LIVE_RELOAD;
479
480	wp_enqueue_script(
481	'gutenberg-live-reload',
482	$live_reload_url
483	);
484	}
485	}
486	add_action( 'enqueue_block_editor_assets', 'gutenberg_enqueue_block_editor_assets' );
487
488	/**
489	* Retrieves a unique and reasonably short and human-friendly filename for a
490	* vendor script based on a URL and the script handle.
491	*
492	* @param string $handle The name of the script.
493	* @param string $src Full URL of the external script.
494	*
495	* @return string Script filename suitable for local caching.
496	*
497	* @since 0.1.0
498	*/
499	function gutenberg_vendor_script_filename( $handle, $src ) {
500	$filename = basename( $src );
501	$match = preg_match(
502	'/^'
503	. '(?P<ignore>.*?)'
504	. '(?P<suffix>\.min)?'
505	. '(?P<extension>\.js)'
506	. '(?P<extra>.*)'
507	. '$/',
508	$filename,
509	$filename_pieces
510	);
511
512	$prefix = $handle;
513	$suffix = $match ? $filename_pieces['suffix'] : '';
514	$hash = substr( md5( $src ), 0, 8 );
515
516	return "${prefix}${suffix}.${hash}.js";
517	}
518
519	/**
520	* Registers a vendor script from a URL, preferring a locally cached version if
521	* possible, or downloading it if the cached version is unavailable or
522	* outdated.
523	*
524	* @param WP_Scripts $scripts WP_Scripts instance.
525	* @param string $handle Name of the script.
526	* @param string $src Full URL of the external script.
527	* @param array $deps Optional. An array of registered script handles this
528	* script depends on.
529	* @param string\|bool\|null $ver Optional. String specifying script version number, if it has one, which is added to the URL
530	* as a query string for cache busting purposes. If version is set to false, a version
531	* number is automatically added equal to current installed WordPress version.
532	* If set to null, no version is added.
533	* @param bool $in_footer Optional. Whether to enqueue the script before </body> instead of in the <head>.
534	* Default 'false'.
535	*
536	* @since 0.1.0
537	*/
538	function gutenberg_register_vendor_script( $scripts, $handle, $src, $deps = array(), $ver = null, $in_footer = false ) {
539	if ( defined( 'GUTENBERG_LOAD_VENDOR_SCRIPTS' ) && ! GUTENBERG_LOAD_VENDOR_SCRIPTS ) {
540	return;
541	}
542
543	$filename = gutenberg_vendor_script_filename( $handle, $src );
544
545	if ( defined( 'GUTENBERG_LIST_VENDOR_ASSETS' ) && GUTENBERG_LIST_VENDOR_ASSETS ) {
546	echo "$src\|$filename\n";
547	return;
548	}
549
550	$full_path = gutenberg_dir_path() . 'vendor/' . $filename;
551
552	$needs_fetch = (
553	defined( 'GUTENBERG_DEVELOPMENT_MODE' ) && GUTENBERG_DEVELOPMENT_MODE && (
554	! file_exists( $full_path ) \|\|
555	time() - filemtime( $full_path ) >= DAY_IN_SECONDS
556	)
557	);
558
559	if ( $needs_fetch ) {
560	// Determine whether we can write to this file. If not, don't waste
561	// time doing a network request.
562	// @codingStandardsIgnoreStart
563
564	$is_writable = is_writable( $full_path );
565	if ( $is_writable ) {
566	$f = @fopen( $full_path, 'a' );
567	if ( ! $f ) {
568	$is_writable = false;
569	} else {
570	fclose( $f );
571	}
572	}
573
574	// @codingStandardsIgnoreEnd
575	if ( ! $is_writable ) {
576	// Failed to open the file for writing, probably due to server
577	// permissions. Enqueue the script directly from the URL instead.
578	gutenberg_override_script( $scripts, $handle, $src, $deps, $ver, $in_footer );
579	return;
580	}
581
582	$response = wp_remote_get( $src );
583	if ( wp_remote_retrieve_response_code( $response ) === 200 ) {
584	$f = fopen( $full_path, 'w' );
585	fwrite( $f, wp_remote_retrieve_body( $response ) );
586	fclose( $f );
587	} elseif ( ! filesize( $full_path ) ) {
588	// The request failed. If the file is already cached, continue to
589	// use this file. If not, then unlink the 0 byte file, and enqueue
590	// the script directly from the URL.
591	gutenberg_override_script( $scripts, $handle, $src, $deps, $ver, $in_footer );
592	unlink( $full_path );
593	return;
594	}
595	}
596	gutenberg_override_script(
597	$scripts,
598	$handle,
599	gutenberg_url( 'vendor/' . $filename ),
600	$deps,
601	$ver,
602	$in_footer
603	);
604	}
605
606	/**
607	* Extends block editor settings to remove the Gutenberg's `editor-styles.css`;
608	*
609	* @param array $settings Default editor settings.
610	*
611	* @return array Filtered editor settings.
612	*/
613	function gutenberg_extend_block_editor_styles( $settings ) {
614	if ( empty( $settings['styles'] ) ) {
615	$settings['styles'] = array();
616	} else {
617	/*
618	* The styles setting is an array of CSS strings, so there is no direct
619	* way to find the default styles. To maximize stability, load (again)
620	* the default styles from disk and find its place in the array.
621	*
622	* See: https://github.com/WordPress/wordpress-develop/blob/5.0.3/src/wp-admin/edit-form-blocks.php#L168-L175
623	*/
624
625	$default_styles = file_get_contents(
626	is_rtl() ?
627	ABSPATH . WPINC . '/css/dist/editor/editor-styles-rtl.css' :
628	ABSPATH . WPINC . '/css/dist/editor/editor-styles.css'
629	);
630
631	/*
632	* Iterate backwards from the end of the array since the preferred
633	* insertion point in case not found is prepended as first entry.
634	*/
635	for ( $i = count( $settings['styles'] ) - 1; $i >= 0; $i-- ) {
636	if ( isset( $settings['styles'][ $i ]['css'] ) &&
637	$default_styles === $settings['styles'][ $i ]['css'] ) {
638	break;
639	}
640	}
641	}
642
643	// Substitute default styles if found. Otherwise, prepend to setting array.
644	if ( isset( $i ) && $i >= 0 ) {
645	unset( $settings['styles'][ $i ] );
646	}
647
648	// Remove the default font editor styles for FSE themes.
649	if ( gutenberg_is_fse_theme() ) {
650	foreach ( $settings['styles'] as $j => $style ) {
651	if ( 0 === strpos( $style['css'], 'body { font-family:' ) ) {
652	unset( $settings['styles'][ $j ] );
653	}
654	}
655	}
656
657	return $settings;
658	}
659	add_filter( 'block_editor_settings', 'gutenberg_extend_block_editor_styles' );
660
661	/**
662	* Adds a flag to the editor settings to know whether we're in FSE theme or not.
663	*
664	* @param array $settings Default editor settings.
665	*
666	* @return array Filtered editor settings.
667	*/
668	function gutenberg_extend_block_editor_settings_with_fse_theme_flag( $settings ) {
669	$settings['isFSETheme'] = gutenberg_is_fse_theme();
670
671	// Enable the new layout options for themes with a theme.json file.
672	$settings['supportsLayout'] = WP_Theme_JSON_Resolver::theme_has_support();
673
674	return $settings;
675	}
676	add_filter( 'block_editor_settings', 'gutenberg_extend_block_editor_settings_with_fse_theme_flag' );
677
678	/**
679	* Sets the editor styles to be consumed by JS.
680	*/
681	function gutenberg_extend_block_editor_styles_html() {
682	$handles = array(
683	'wp-block-editor',
684	'wp-block-library',
685	'wp-edit-blocks',
686	);
687
688	$block_registry = WP_Block_Type_Registry::get_instance();
689
690	foreach ( $block_registry->get_all_registered() as $block_type ) {
691	if ( ! empty( $block_type->style ) ) {
692	$handles[] = $block_type->style;
693	}
694
695	if ( ! empty( $block_type->editor_style ) ) {
696	$handles[] = $block_type->editor_style;
697	}
698	}
699
700	$handles = array_unique( $handles );
701	$done = wp_styles()->done;
702
703	ob_start();
704
705	wp_styles()->done = array();
706	wp_styles()->do_items( $handles );
707	wp_styles()->done = $done;
708
709	$editor_styles = wp_json_encode( array( 'html' => ob_get_clean() ) );
710
711	echo "<script>window.__editorStyles = $editor_styles</script>";
712	}
713	add_action( 'admin_footer-toplevel_page_gutenberg-edit-site', 'gutenberg_extend_block_editor_styles_html' );
714
715	/**
716	* Adds a polyfill for object-fit in environments which do not support it.
717	*
718	* The script registration occurs in `gutenberg_register_vendor_scripts`, which
719	* should be removed in coordination with this function.
720	*
721	* Remove this when the minimum supported version is WordPress 5.7
722	*
723	* @see gutenberg_register_vendor_scripts
724	* @see https://developer.mozilla.org/en-US/docs/Web/CSS/object-fit
725	*
726	* @since 9.1.0
727	*
728	* @param WP_Scripts $scripts WP_Scripts object.
729	*/
730	function gutenberg_add_object_fit_polyfill( $scripts ) {
731	did_action( 'init' ) && $scripts->add_inline_script(
732	'wp-polyfill',
733	wp_get_script_polyfill(
734	$scripts,
735	array(
736	'"objectFit" in document.documentElement.style' => 'object-fit-polyfill',
737	)
738	)
739	);
740	}
741	add_action( 'wp_default_scripts', 'gutenberg_add_object_fit_polyfill', 20 );
742