WordPress Version: 6.5
/**
* Server-side rendering of the `core/post-navigation-link` block.
*
* @package WordPress
*/
/**
* Renders the `core/post-navigation-link` block on the server.
*
* @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 '';
}
// Get the navigation type to show the proper link. Available options are `next|previous`.
$navigation_type = isset($attributes['type']) ? $attributes['type'] : 'next';
// Allow only `next` and `previous` in `$navigation_type`.
if (!in_array($navigation_type, array('next', 'previous'), true)) {
return '';
}
$classes = "post-navigation-link-{$navigation_type}";
if (isset($attributes['textAlign'])) {
$classes .= " has-text-align-{$attributes['textAlign']}";
}
$wrapper_attributes = get_block_wrapper_attributes(array('class' => $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 = '';
// Only use hardcoded values here, otherwise we need to add escaping where these values are used.
$arrow_map = array('none' => '', 'arrow' => array('next' => '→', 'previous' => '←'), 'chevron' => array('next' => '»', 'previous' => '«'));
// If a custom label is provided, make this a link.
// `$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) {
$format = '<span class="post-navigation-link__label">' . wp_kses_post($label) . '</span> %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) {
$link = '<span class="post-navigation-link__label">' . wp_kses_post($label) . '</span> <span class="post-navigation-link__title">%title</span>';
} 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');
$link = sprintf('<span class="post-navigation-link__label">%1$s</span> <span class="post-navigation-link__title">%2$s</span>', wp_kses_post($label), '%title');
}
}
}
// Display arrows.
if (isset($attributes['arrow']) && 'none' !== $attributes['arrow'] && isset($arrow_map[$attributes['arrow']])) {
$arrow = $arrow_map[$attributes['arrow']][$navigation_type];
if ('next' === $navigation_type) {
$format = '%link<span class="wp-block-post-navigation-link__arrow-next is-arrow-' . $attributes['arrow'] . '" aria-hidden="true">' . $arrow . '</span>';
} else {
$format = '<span class="wp-block-post-navigation-link__arrow-previous is-arrow-' . $attributes['arrow'] . '" aria-hidden="true">' . $arrow . '</span>%link';
}
}
/*
* The dynamic portion of the function name, `$navigation_type`,
* Refers to the type of adjacency, 'next' or 'previous'.
*
* @see https://developer.wordpress.org/reference/functions/get_previous_post_link/
* @see https://developer.wordpress.org/reference/functions/get_next_post_link/
*/
$get_link_function = "get_{$navigation_type}_post_link";
if (!empty($attributes['taxonomy'])) {
$content = $get_link_function($format, $link, true, '', $attributes['taxonomy']);
} else {
$content = $get_link_function($format, $link);
}
return sprintf('<div %1$s>%2$s</div>', $wrapper_attributes, $content);
}