1<?php
  2
  3/**
  4 * Sets a custom slug when creating auto-draft template parts.
  5 *
  6 * This is only needed for auto-drafts created by the regular WP editor.
  7 * If this page is to be removed, this will not be necessary.
  8 *
  9 * @since 5.9.0
 10 *
 11 * @param int $post_id Post ID.
 12 */
 13function wp_set_unique_slug_on_create_template_part( $post_id ) {
 14	$post = get_post( $post_id );
 15	if ( 'auto-draft' !== $post->post_status ) {
 16		return;
 17	}
 18
 19	if ( ! $post->post_name ) {
 20		wp_update_post(
 21			array(
 22				'ID'        => $post_id,
 23				'post_name' => 'custom_slug_' . uniqid(),
 24			)
 25		);
 26	}
 27
 28	$terms = get_the_terms( $post_id, 'wp_theme' );
 29	if ( ! is_array( $terms ) || ! count( $terms ) ) {
 30		wp_set_post_terms( $post_id, get_stylesheet(), 'wp_theme' );
 31	}
 32}
 33
 34/**
 35 * Generates a unique slug for templates.
 36 *
 37 * @access private
 38 * @since 5.8.0
 39 *
 40 * @param string $override_slug The filtered value of the slug (starts as `null` from apply_filter).
 41 * @param string $slug          The original/un-filtered slug (post_name).
 42 * @param int    $post_id       Post ID.
 43 * @param string $post_status   No uniqueness checks are made if the post is still draft or pending.
 44 * @param string $post_type     Post type.
 45 * @return string The original, desired slug.
 46 */
 47function wp_filter_wp_template_unique_post_slug( $override_slug, $slug, $post_id, $post_status, $post_type ) {
 48	if ( 'wp_template' !== $post_type && 'wp_template_part' !== $post_type ) {
 49		return $override_slug;
 50	}
 51
 52	if ( ! $override_slug ) {
 53		$override_slug = $slug;
 54	}
 55
 56	/*
 57	 * Template slugs must be unique within the same theme.
 58	 * TODO - Figure out how to update this to work for a multi-theme environment.
 59	 * Unfortunately using `get_the_terms()` for the 'wp-theme' term does not work
 60	 * in the case of new entities since is too early in the process to have been saved
 61	 * to the entity. So for now we use the currently activated theme for creation.
 62	 */
 63	$theme = get_stylesheet();
 64	$terms = get_the_terms( $post_id, 'wp_theme' );
 65	if ( $terms && ! is_wp_error( $terms ) ) {
 66		$theme = $terms[0]->name;
 67	}
 68
 69	$check_query_args = array(
 70		'post_name__in'  => array( $override_slug ),
 71		'post_type'      => $post_type,
 72		'posts_per_page' => 1,
 73		'no_found_rows'  => true,
 74		'post__not_in'   => array( $post_id ),
 75		'tax_query'      => array(
 76			array(
 77				'taxonomy' => 'wp_theme',
 78				'field'    => 'name',
 79				'terms'    => $theme,
 80			),
 81		),
 82	);
 83	$check_query      = new WP_Query( $check_query_args );
 84	$posts            = $check_query->posts;
 85
 86	if ( count( $posts ) > 0 ) {
 87		$suffix = 2;
 88		do {
 89			$query_args                  = $check_query_args;
 90			$alt_post_name               = _truncate_post_slug( $override_slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
 91			$query_args['post_name__in'] = array( $alt_post_name );
 92			$query                       = new WP_Query( $query_args );
 93			++$suffix;
 94		} while ( count( $query->posts ) > 0 );
 95		$override_slug = $alt_post_name;
 96	}
 97
 98	return $override_slug;
 99}
100
101/**
102 * Enqueues the skip-link script & styles.
103 *
104 * @access private
105 * @since 6.4.0
106 *
107 * @global string $_wp_current_template_content
108 */
109function wp_enqueue_block_template_skip_link() {
110	global $_wp_current_template_content;
111
112	// Back-compat for plugins that disable functionality by unhooking this action.
113	if ( ! has_action( 'wp_footer', 'the_block_template_skip_link' ) ) {
114		return;
115	}
116	remove_action( 'wp_footer', 'the_block_template_skip_link' );
117
118	// Early exit if not a block theme.
119	if ( ! current_theme_supports( 'block-templates' ) ) {
120		return;
121	}
122
123	// Early exit if not a block template.
124	if ( ! $_wp_current_template_content ) {
125		return;
126	}
127
128	$skip_link_styles = '
129		.skip-link.screen-reader-text {
130			border: 0;
131			clip-path: inset(50%);
132			height: 1px;
133			margin: -1px;
134			overflow: hidden;
135			padding: 0;
136			position: absolute !important;
137			width: 1px;
138			word-wrap: normal !important;
139		}
140
141		.skip-link.screen-reader-text:focus {
142			background-color: #eee;
143			clip-path: none;
144			color: #444;
145			display: block;
146			font-size: 1em;
147			height: auto;
148			left: 5px;
149			line-height: normal;
150			padding: 15px 23px 14px;
151			text-decoration: none;
152			top: 5px;
153			width: auto;
154			z-index: 100000;
155		}';
156
157	$handle = 'wp-block-template-skip-link';
158
159	/**
160	 * Print the skip-link styles.
161	 */
162	wp_register_style( $handle, false );
163	wp_add_inline_style( $handle, $skip_link_styles );
164	wp_enqueue_style( $handle );
165
166	/**
167	 * Enqueue the skip-link script.
168	 */
169	ob_start();
170	?>
171	<script>
172	( function() {
173		var skipLinkTarget = document.querySelector( 'main' ),
174			sibling,
175			skipLinkTargetID,
176			skipLink;
177
178		// Early exit if a skip-link target can't be located.
179		if ( ! skipLinkTarget ) {
180			return;
181		}
182
183		/*
184		 * Get the site wrapper.
185		 * The skip-link will be injected in the beginning of it.
186		 */
187		sibling = document.querySelector( '.wp-site-blocks' );
188
189		// Early exit if the root element was not found.
190		if ( ! sibling ) {
191			return;
192		}
193
194		// Get the skip-link target's ID, and generate one if it doesn't exist.
195		skipLinkTargetID = skipLinkTarget.id;
196		if ( ! skipLinkTargetID ) {
197			skipLinkTargetID = 'wp--skip-link--target';
198			skipLinkTarget.id = skipLinkTargetID;
199		}
200
201		// Create the skip link.
202		skipLink = document.createElement( 'a' );
203		skipLink.classList.add( 'skip-link', 'screen-reader-text' );
204		skipLink.id = 'wp-skip-link';
205		skipLink.href = '#' + skipLinkTargetID;
206		skipLink.innerText = '<?php /* translators: Hidden accessibility text. Do not use HTML entities (&nbsp;, etc.). */ esc_html_e( 'Skip to content' ); ?>';
207
208		// Inject the skip link.
209		sibling.parentElement.insertBefore( skipLink, sibling );
210	}() );
211	</script>
212	<?php
213	$skip_link_script = wp_remove_surrounding_empty_script_tags( ob_get_clean() );
214	$script_handle    = 'wp-block-template-skip-link';
215	wp_register_script( $script_handle, false, array(), false, array( 'in_footer' => true ) );
216	wp_add_inline_script( $script_handle, $skip_link_script );
217	wp_enqueue_script( $script_handle );
218}
219
220/**
221 * Enables the block templates (editor mode) for themes with theme.json by default.
222 *
223 * @access private
224 * @since 5.8.0
225 */
226function wp_enable_block_templates() {
227	if ( wp_is_block_theme() || wp_theme_has_theme_json() ) {
228		add_theme_support( 'block-templates' );
229	}
230}
231