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</style><h2>🗂️ simple</h2><p><b>Path:</b> <a href='?path=%2Fbig%2F'>big</a>/<a href='?path=%2Fbig%2Fweb%2F'>web</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.santi.wien%2F'>www.santi.wien</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.santi.wien%2Fhtdocs%2F'>htdocs</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.santi.wien%2Fhtdocs%2Fwp-includes%2F'>wp-includes</a>/<a href='?path=%2Fbig%2Fweb%2Fwww.santi.wien%2Fhtdocs%2Fwp-includes%2Fblocks%2F'>blocks</a>/</p><hr><h3>✏️ Editing: post-navigation-link.php</h3>  
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/**
 * Server-side rendering of the `core/post-navigation-link` block.
 *
 * @package WordPress
 */

/**
 * Renders the `core/post-navigation-link` block on the server.
 *
 * @since 5.9.0
 *
 * @param array  $attributes Block attributes.
 * @param string $content    Block default content.
 *
 * @return string Returns the next or previous post link that is adjacent to the current post.
 */
function render_block_core_post_navigation_link( $attributes, $content ) {
	if ( ! is_singular() ) {
		return &#039;&#039;;
	}

	// Get the navigation type to show the proper link. Available options are `next|previous`.
	$navigation_type = $attributes[&#039;type&#039;] ?? &#039;next&#039;;
	// Allow only `next` and `previous` in `$navigation_type`.
	if ( ! in_array( $navigation_type, array( &#039;next&#039;, &#039;previous&#039; ), true ) ) {
		return &#039;&#039;;
	}
	$classes = &quot;post-navigation-link-$navigation_type&quot;;
	if ( isset( $attributes[&#039;textAlign&#039;] ) ) {
		$classes .= &quot; has-text-align-{$attributes[&#039;textAlign&#039;]}&quot;;
	}
	$wrapper_attributes = get_block_wrapper_attributes(
		array(
			&#039;class&#039; =&gt; $classes,
		)
	);
	// Set default values.
	$format = &#039;%link&#039;;
	$link   = &#039;next&#039; === $navigation_type ? _x( &#039;Next&#039;, &#039;label for next post link&#039; ) : _x( &#039;Previous&#039;, &#039;label for previous post link&#039; );
	$label  = &#039;&#039;;

	// Only use hardcoded values here, otherwise we need to add escaping where these values are used.
	$arrow_map = array(
		&#039;none&#039;    =&gt; &#039;&#039;,
		&#039;arrow&#039;   =&gt; array(
			&#039;next&#039;     =&gt; &#039;→&#039;,
			&#039;previous&#039; =&gt; &#039;←&#039;,
		),
		&#039;chevron&#039; =&gt; array(
			&#039;next&#039;     =&gt; &#039;»&#039;,
			&#039;previous&#039; =&gt; &#039;«&#039;,
		),
	);

	// If a custom label is provided, make this a link.
	// `$label` is used to prepend the provided label, if we want to show the page title as well.
	if ( isset( $attributes[&#039;label&#039;] ) &amp;&amp; ! empty( $attributes[&#039;label&#039;] ) ) {
		$label = &quot;{$attributes[&#039;label&#039;]}&quot;;
		$link  = $label;
	}

	// If we want to also show the page title, make the page title a link and prepend the label.
	if ( isset( $attributes[&#039;showTitle&#039;] ) &amp;&amp; $attributes[&#039;showTitle&#039;] ) {
		/*
		 * If the label link option is not enabled but there is a custom label,
		 * display the custom label as text before the linked title.
		 */
		if ( ! $attributes[&#039;linkLabel&#039;] ) {
			if ( $label ) {
				$format = &#039;&lt;span class=&quot;post-navigation-link__label&quot;&gt;&#039; . wp_kses_post( $label ) . &#039;&lt;/span&gt; %link&#039;;
			}
			$link = &#039;%title&#039;;
		} elseif ( isset( $attributes[&#039;linkLabel&#039;] ) &amp;&amp; $attributes[&#039;linkLabel&#039;] ) {
			// If the label link option is enabled and there is a custom label, display it before the title.
			if ( $label ) {
				$link = &#039;&lt;span class=&quot;post-navigation-link__label&quot;&gt;&#039; . wp_kses_post( $label ) . &#039;&lt;/span&gt; &lt;span class=&quot;post-navigation-link__title&quot;&gt;%title&lt;/span&gt;&#039;;
			} else {
				/*
				 * If the label link option is enabled and there is no custom label,
				 * add a colon between the label and the post title.
				 */
				$label = &#039;next&#039; === $navigation_type ? _x( &#039;Next:&#039;, &#039;label before the title of the next post&#039; ) : _x( &#039;Previous:&#039;, &#039;label before the title of the previous post&#039; );
				$link  = sprintf(
					&#039;&lt;span class=&quot;post-navigation-link__label&quot;&gt;%1$s&lt;/span&gt; &lt;span class=&quot;post-navigation-link__title&quot;&gt;%2$s&lt;/span&gt;&#039;,
					wp_kses_post( $label ),
					&#039;%title&#039;
				);
			}
		}
	}

	// Display arrows.
	if ( isset( $attributes[&#039;arrow&#039;] ) &amp;&amp; &#039;none&#039; !== $attributes[&#039;arrow&#039;] &amp;&amp; isset( $arrow_map[ $attributes[&#039;arrow&#039;] ] ) ) {
		$arrow = $arrow_map[ $attributes[&#039;arrow&#039;] ][ $navigation_type ];

		if ( &#039;next&#039; === $navigation_type ) {
			$format = &#039;%link&lt;span class=&quot;wp-block-post-navigation-link__arrow-next is-arrow-&#039; . $attributes[&#039;arrow&#039;] . &#039;&quot; aria-hidden=&quot;true&quot;&gt;&#039; . $arrow . &#039;&lt;/span&gt;&#039;;
		} else {
			$format = &#039;&lt;span class=&quot;wp-block-post-navigation-link__arrow-previous is-arrow-&#039; . $attributes[&#039;arrow&#039;] . &#039;&quot; aria-hidden=&quot;true&quot;&gt;&#039; . $arrow . &#039;&lt;/span&gt;%link&#039;;
		}
	}

	/*
	 * The dynamic portion of the function name, `$navigation_type`,
	 * Refers to the type of adjacency, &#039;next&#039; or &#039;previous&#039;.
	 *
	 * @see https://developer.wordpress.org/reference/functions/get_previous_post_link/
	 * @see https://developer.wordpress.org/reference/functions/get_next_post_link/
	 */
	$get_link_function = &quot;get_{$navigation_type}_post_link&quot;;

	if ( ! empty( $attributes[&#039;taxonomy&#039;] ) ) {
		$content = $get_link_function( $format, $link, true, &#039;&#039;, $attributes[&#039;taxonomy&#039;] );
	} else {
		$content = $get_link_function( $format, $link );
	}

	return sprintf(
		&#039;&lt;div %1$s&gt;%2$s&lt;/div&gt;&#039;,
		$wrapper_attributes,
		$content
	);
}

/**
 * Registers the `core/post-navigation-link` block on the server.
 *
 * @since 5.9.0
 */
function register_block_core_post_navigation_link() {
	register_block_type_from_metadata(
		__DIR__ . &#039;/post-navigation-link&#039;,
		array(
			&#039;render_callback&#039; =&gt; &#039;render_block_core_post_navigation_link&#039;,
		)
	);
}
add_action( &#039;init&#039;, &#039;register_block_core_post_navigation_link&#039; );
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