gutenberg / lib / widgets.php

widgets.php in Gutenberg 5.6.0, at lib/widgets.php

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1	<?php
2	/**
3	* Functions used in making widgets interopable with block editors.
4	*
5	* @package gutenberg
6	*/
7
8	/**
9	* Emulates the Widgets screen `admin_print_styles` when at the block editor
10	* screen.
11	*/
12	function gutenberg_block_editor_admin_print_styles() {
13	if ( get_current_screen()->is_block_editor() ) {
14	/** This action is documented in wp-admin/admin-footer.php */
15	// phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
16	do_action( 'admin_print_styles-widgets.php' );
17	}
18	}
19	add_action( 'admin_print_styles', 'gutenberg_block_editor_admin_print_styles' );
20
21	/**
22	* Emulates the Widgets screen `admin_print_scripts` when at the block editor
23	* screen.
24	*/
25	function gutenberg_block_editor_admin_print_scripts() {
26	if ( get_current_screen()->is_block_editor() ) {
27	// phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
28	do_action( 'admin_print_scripts-widgets.php' );
29	}
30	}
31	add_action( 'admin_print_scripts', 'gutenberg_block_editor_admin_print_scripts' );
32
33	/**
34	* Emulates the Widgets screen `admin_print_footer_scripts` when at the block
35	* editor screen.
36	*/
37	function gutenberg_block_editor_admin_print_footer_scripts() {
38	if ( get_current_screen()->is_block_editor() ) {
39	/** This action is documented in wp-admin/admin-footer.php */
40	// phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
41	do_action( 'admin_print_footer_scripts-widgets.php' );
42	}
43	}
44	add_action( 'admin_print_footer_scripts', 'gutenberg_block_editor_admin_print_footer_scripts' );
45
46	/**
47	* Emulates the Widgets screen `admin_footer` when at the block editor screen.
48	*/
49	function gutenberg_block_editor_admin_footer() {
50	if ( get_current_screen()->is_block_editor() ) {
51	/** This action is documented in wp-admin/admin-footer.php */
52	// phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
53	do_action( 'admin_footer-widgets.php' );
54	}
55	}
56	add_action( 'admin_footer', 'gutenberg_block_editor_admin_footer' );
57
58	/**
59	* Extends default editor settings with values supporting legacy widgets.
60	*
61	* @param array $settings Default editor settings.
62	*
63	* @return array Filtered editor settings.
64	*/
65	function gutenberg_legacy_widget_settings( $settings ) {
66	/**
67	* TODO: The hardcoded array should be replaced with a mechanism to allow
68	* core and third party blocks to specify they already have equivalent
69	* blocks, and maybe even allow them to have a migration function.
70	*/
71	$core_widgets = array(
72	'WP_Widget_Pages',
73	'WP_Widget_Calendar',
74	'WP_Widget_Archives',
75	'WP_Widget_Media_Audio',
76	'WP_Widget_Media_Image',
77	'WP_Widget_Media_Gallery',
78	'WP_Widget_Media_Video',
79	'WP_Widget_Meta',
80	'WP_Widget_Search',
81	'WP_Widget_Text',
82	'WP_Widget_Categories',
83	'WP_Widget_Recent_Posts',
84	'WP_Widget_Recent_Comments',
85	'WP_Widget_RSS',
86	'WP_Widget_Tag_Cloud',
87	'WP_Nav_Menu_Widget',
88	'WP_Widget_Custom_HTML',
89	);
90
91	$has_permissions_to_manage_widgets = current_user_can( 'edit_theme_options' );
92	$available_legacy_widgets = array();
93	global $wp_widget_factory, $wp_registered_widgets;
94	foreach ( $wp_widget_factory->widgets as $class => $widget_obj ) {
95	if ( ! in_array( $class, $core_widgets ) ) {
96	$available_legacy_widgets[ $class ] = array(
97	'name' => html_entity_decode( $widget_obj->name ),
98	// wp_widget_description is not being used because its input parameter is a Widget Id.
99	// Widgets id's reference to a specific widget instance.
100	// Here we are iterating on all the available widget classes even if no widget instance exists for them.
101	'description' => isset( $widget_obj->widget_options['description'] ) ?
102	html_entity_decode( $widget_obj->widget_options['description'] ) :
103	null,
104	'isCallbackWidget' => false,
105	);
106	}
107	}
108	foreach ( $wp_registered_widgets as $widget_id => $widget_obj ) {
109	if (
110	is_array( $widget_obj['callback'] ) &&
111	isset( $widget_obj['callback'][0] ) &&
112	( $widget_obj['callback'][0] instanceof WP_Widget )
113	) {
114	continue;
115	}
116	$available_legacy_widgets[ $widget_id ] = array(
117	'name' => html_entity_decode( $widget_obj['name'] ),
118	'description' => html_entity_decode( wp_widget_description( $widget_id ) ),
119	'isCallbackWidget' => true,
120	);
121	}
122
123	$settings['hasPermissionsToManageWidgets'] = $has_permissions_to_manage_widgets;
124	$settings['availableLegacyWidgets'] = $available_legacy_widgets;
125
126	return $settings;
127	}
128	add_filter( 'block_editor_settings', 'gutenberg_legacy_widget_settings' );
129