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<?php
/**
* Taxonomy API: Walker_Category_Checklist class
*
* @package WordPress
* @subpackage Administration
* @since 4.4.0
*/
/**
* Core walker class to output an unordered list of category checkbox input elements.
*
* @since 2.5.1
*
* @see Walker
* @see wp_category_checklist()
* @see wp_terms_checklist()
*/
class Walker_Category_Checklist extends Walker {
public $tree_type = 'category';
public $db_fields = array(
'parent' => 'parent',
'id' => 'term_id',
); // TODO: Decouple this.
/**
* Starts the list before the elements are added.
*
* @see Walker::start_lvl()
*
* @since 2.5.1
*
* @param string $output Used to append additional content (passed by reference).
* @param int $depth Depth of category. Used for tab indentation.
* @param array $args An array of arguments. See {@see wp_terms_checklist()}.
*/
public function start_lvl( &$output, $depth = 0, $args = array() ) {
$indent = str_repeat( "\t", $depth );
$output .= "$indent<ul class='children'>\n";
}
/**
* Ends the list of after the elements are added.
*
* @see Walker::end_lvl()
*
* @since 2.5.1
*
* @param string $output Used to append additional content (passed by reference).
* @param int $depth Depth of category. Used for tab indentation.
* @param array $args An array of arguments. See {@see wp_terms_checklist()}.
*/
public function end_lvl( &$output, $depth = 0, $args = array() ) {
$indent = str_repeat( "\t", $depth );
$output .= "$indent</ul>\n";
}
/**
* Start the element output.
*
* @see Walker::start_el()
*
* @since 2.5.1
* @since 5.9.0 Renamed `$category` to `$data_object` and `$id` to `$current_object_id`
* to match parent class for PHP 8 named parameter support.
*
* @param string $output Used to append additional content (passed by reference).
* @param WP_Term $data_object The current term object.
* @param int $depth Depth of the term in reference to parents. Default 0.
* @param array $args An array of arguments. See {@see wp_terms_checklist()}.
* @param int $current_object_id Optional. ID of the current term. Default 0.
*/
public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {
// Restores the more descriptive, specific name for use within this method.
$category = $data_object;
if ( empty( $args['taxonomy'] ) ) {
$taxonomy = 'category';
} else {
$taxonomy = $args['taxonomy'];
}
if ( 'category' === $taxonomy ) {
$name = 'post_category';
} else {
$name = 'tax_input[' . $taxonomy . ']';
}
$args['popular_cats'] = ! empty( $args['popular_cats'] ) ? array_map( 'intval', $args['popular_cats'] ) : array();
$class = in_array( $category->term_id, $args['popular_cats'], true ) ? ' class="popular-category"' : '';
$args['selected_cats'] = ! empty( $args['selected_cats'] ) ? array_map( 'intval', $args['selected_cats'] ) : array();
if ( ! empty( $args['list_only'] ) ) {
$aria_checked = 'false';
$inner_class = 'category';
if ( in_array( $category->term_id, $args['selected_cats'], true ) ) {
$inner_class .= ' selected';
$aria_checked = 'true';
}
$output .= "\n" . '<li' . $class . '>' .
'<div class="' . $inner_class . '" data-term-id=' . $category->term_id .
' tabindex="0" role="checkbox" aria-checked="' . $aria_checked . '">' .
/** This filter is documented in wp-includes/category-template.php */
esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</div>';
} else {
$is_selected = in_array( $category->term_id, $args['selected_cats'], true );
$is_disabled = ! empty( $args['disabled'] );
$li_element_id = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );
$checkbox_element_id = wp_unique_prefixed_id( "in-{$taxonomy}-{$category->term_id}-" );
$output .= "\n<li id='" . esc_attr( $li_element_id ) . "'$class>" .
'<label class="selectit"><input value="' . $category->term_id . '" type="checkbox" name="' . $name . '[]" id="' . esc_attr( $checkbox_element_id ) . '"' .
checked( $is_selected, true, false ) .
disabled( $is_disabled, true, false ) . ' /> ' .
/** This filter is documented in wp-includes/category-template.php */
esc_html( apply_filters( 'the_category', $category->name, '', '' ) ) . '</label>';
}
}
/**
* Ends the element output, if needed.
*
* @see Walker::end_el()
*
* @since 2.5.1
* @since 5.9.0 Renamed `$category` to `$data_object` to match parent class for PHP 8 named parameter support.
*
* @param string $output Used to append additional content (passed by reference).
* @param WP_Term $data_object The current term object.
* @param int $depth Depth of the term in reference to parents. Default 0.
* @param array $args An array of arguments. See {@see wp_terms_checklist()}.
*/
public function end_el( &$output, $data_object, $depth = 0, $args = array() ) {
$output .= "</li>\n";
}
}