$classes ) );
// Set default values.
$format = '%link';
$link = 'next' === $navigation_type ? _x( 'Next', 'label for next post link' ) : _x( 'Previous', 'label for previous post link' );
$label = '';
// If a custom label is provided, make this a link.
// `$label` is used to prepend the provided label, if we want to show the page title as well.
if ( isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ) {
$label = "{$attributes['label']}";
$link = $label;
}
// If we want to also show the page title, make the page title a link and prepend the label.
if ( isset( $attributes['showTitle'] ) && $attributes['showTitle'] ) {
/*
* 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['linkLabel'] ) {
if ( $label ) {
$format = '' . $label . ' %link';
}
$link = '%title';
} elseif ( isset( $attributes['linkLabel'] ) && $attributes['linkLabel'] ) {
// If the label link option is enabled and there is a custom label, display it before the title.
if ( $label ) {
$link = '' . $label . ' %title';
} 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 = 'next' === $navigation_type ? _x( 'Next:', 'label before the title of the next post' ) : _x( 'Previous:', 'label before the title of the previous post' );
$link = sprintf(
'%1$s %2$s',
$label,
'%title'
);
}
}
}
// The dynamic portion of the function name, `$navigation_type`,
// refers to the type of adjacency, 'next' or 'previous'.
$get_link_function = "get_{$navigation_type}_post_link";
$content = $get_link_function( $format, $link );
return sprintf(
'%2$s
',
$wrapper_attributes,
$content
);
}
/**
* Registers the `core/post-navigation-link` block on the server.
*/
function register_block_core_post_navigation_link() {
register_block_type_from_metadata(
__DIR__ . '/post-navigation-link',
array(
'render_callback' => 'render_block_core_post_navigation_link',
)
);
}
add_action( 'init', 'register_block_core_post_navigation_link' );