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<?php
/**
* Server-side rendering of the `core/post-excerpt` block.
*
* @package WordPress
*/
/**
* Renders the `core/post-excerpt` block on the server.
*
* @since 5.8.0
*
* @param array $attributes Block attributes.
* @param string $content Block default content.
* @param WP_Block $block Block instance.
* @return string Returns the filtered post excerpt for the current post wrapped inside "p" tags.
*/
function render_block_core_post_excerpt( $attributes, $content, $block ) {
if ( ! isset( $block->context['postId'] ) ) {
return '';
}
/*
* The purpose of the excerpt length setting is to limit the length of both
* automatically generated and user-created excerpts.
* Because the excerpt_length filter only applies to auto generated excerpts,
* wp_trim_words is used instead.
*/
$excerpt_length = $attributes['excerptLength'];
$excerpt = get_the_excerpt( $block->context['postId'] );
if ( isset( $excerpt_length ) ) {
$excerpt = wp_trim_words( $excerpt, $excerpt_length );
}
$more_text = ! empty( $attributes['moreText'] ) ? '<a class="wp-block-post-excerpt__more-link" href="' . esc_url( get_the_permalink( $block->context['postId'] ) ) . '">' . wp_kses_post( $attributes['moreText'] ) . '</a>' : '';
$filter_excerpt_more = static function ( $more ) use ( $more_text ) {
return empty( $more_text ) ? $more : '';
};
/**
* Some themes might use `excerpt_more` filter to handle the
* `more` link displayed after a trimmed excerpt. Since the
* block has a `more text` attribute we have to check and
* override if needed the return value from this filter.
* So if the block's attribute is not empty override the
* `excerpt_more` filter and return nothing. This will
* result in showing only one `read more` link at a time.
*/
add_filter( 'excerpt_more', $filter_excerpt_more );
$classes = array();
if ( isset( $attributes['textAlign'] ) ) {
$classes[] = 'has-text-align-' . $attributes['textAlign'];
}
if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
$classes[] = 'has-link-color';
}
$wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
$content = '<p class="wp-block-post-excerpt__excerpt">' . $excerpt;
$show_more_on_new_line = ! isset( $attributes['showMoreOnNewLine'] ) || $attributes['showMoreOnNewLine'];
if ( $show_more_on_new_line && ! empty( $more_text ) ) {
$content .= '</p><p class="wp-block-post-excerpt__more-text">' . $more_text . '</p>';
} else {
$content .= " $more_text</p>";
}
remove_filter( 'excerpt_more', $filter_excerpt_more );
return sprintf( '<div %1$s>%2$s</div>', $wrapper_attributes, $content );
}
/**
* Registers the `core/post-excerpt` block on the server.
*
* @since 5.8.0
*/
function register_block_core_post_excerpt() {
register_block_type_from_metadata(
__DIR__ . '/post-excerpt',
array(
'render_callback' => 'render_block_core_post_excerpt',
)
);
}
add_action( 'init', 'register_block_core_post_excerpt' );
/**
* If themes or plugins filter the excerpt_length, we need to
* override the filter in the editor, otherwise
* the excerpt length block setting has no effect.
* Returns 100 because 100 is the max length in the setting.
*/
if ( is_admin() ||
defined( 'REST_REQUEST' ) && REST_REQUEST ) {
add_filter(
'excerpt_length',
static function () {
return 100;
},
PHP_INT_MAX
);
}