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<?php /** * Taxonomy API: Walker_Category class * * @package WordPress * @subpackage Template * @since 4.4.0 */ /** * Core class used to create an HTML list of categories. * * @since 2.1.0 * * @see Walker */ class Walker_Category extends Walker { /** * What the class handles. * * @since 2.1.0 * @var string * * @see Walker::$tree_type */ public $tree_type = 'category'; /** * Database fields to use. * * @since 2.1.0 * @var array * * @see Walker::$db_fields * @todo Decouple this */ public $db_fields = array( 'parent' => 'parent', 'id' => 'term_id', ); /** * Starts the list before the elements are added. * * @since 2.1.0 * * @see Walker::start_lvl() * * @param string $output Used to append additional content. Passed by reference. * @param int $depth Optional. Depth of category. Used for tab indentation. Default 0. * @param array $args Optional. An array of arguments. Will only append content if style argument * value is 'list'. See wp_list_categories(). Default empty array. */ public function start_lvl( &$output, $depth = 0, $args = array() ) { if ( 'list' != $args['style'] ) { return; } $indent = str_repeat( "\t", $depth ); $output .= "$indent<ul class='children'>\n"; } /** * Ends the list of after the elements are added. * * @since 2.1.0 * * @see Walker::end_lvl() * * @param string $output Used to append additional content. Passed by reference. * @param int $depth Optional. Depth of category. Used for tab indentation. Default 0. * @param array $args Optional. An array of arguments. Will only append content if style argument * value is 'list'. See wp_list_categories(). Default empty array. */ public function end_lvl( &$output, $depth = 0, $args = array() ) { if ( 'list' != $args['style'] ) { return; } $indent = str_repeat( "\t", $depth ); $output .= "$indent</ul>\n"; } /** * Starts the element output. * * @since 2.1.0 * * @see Walker::start_el() * * @param string $output Used to append additional content (passed by reference). * @param object $category Category data object. * @param int $depth Optional. Depth of category in reference to parents. Default 0. * @param array $args Optional. An array of arguments. See wp_list_categories(). Default empty array. * @param int $id Optional. ID of the current category. Default 0. */ public function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) { /** This filter is documented in site-inc/category-template.php */ $cat_name = apply_filters( 'list_cats', esc_attr( $category->name ), $category ); // Don't generate an element if the category name is empty. if ( '' === $cat_name ) { return; } $link = '<a href="' . esc_url( get_term_link( $category ) ) . '" '; if ( $args['use_desc_for_title'] && ! empty( $category->description ) ) { /** * Filters the category description for display. * * @since 1.2.0 * * @param string $description Category description. * @param object $category Category object. */ $link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"'; } $link .= '>'; $link .= $cat_name . '</a>'; if ( ! empty( $args['feed_image'] ) || ! empty( $args['feed'] ) ) { $link .= ' '; if ( empty( $args['feed_image'] ) ) { $link .= '('; } $link .= '<a href="' . esc_url( get_term_feed_link( $category->term_id, $category->taxonomy, $args['feed_type'] ) ) . '"'; if ( empty( $args['feed'] ) ) { $alt = ' alt="' . sprintf( __( 'Feed for all posts filed under %s' ), $cat_name ) . '"'; } else { $alt = ' alt="' . $args['feed'] . '"'; $name = $args['feed']; $link .= empty( $args['title'] ) ? '' : $args['title']; } $link .= '>'; if ( empty( $args['feed_image'] ) ) { $link .= $name; } else { $link .= "<img src='" . esc_url( $args['feed_image'] ) . "'$alt" . ' />'; } $link .= '</a>'; if ( empty( $args['feed_image'] ) ) { $link .= ')'; } } if ( ! empty( $args['show_count'] ) ) { $link .= ' (' . number_format_i18n( $category->count ) . ')'; } if ( 'list' == $args['style'] ) { $output .= "\t<li"; $css_classes = array( 'cat-item', 'cat-item-' . $category->term_id, ); if ( ! empty( $args['current_category'] ) ) { // 'current_category' can be an array, so we use `get_terms()`. $_current_terms = get_terms( $category->taxonomy, array( 'include' => $args['current_category'], 'hide_empty' => false, ) ); foreach ( $_current_terms as $_current_term ) { if ( $category->term_id == $_current_term->term_id ) { $css_classes[] = 'current-cat'; } elseif ( $category->term_id == $_current_term->parent ) { $css_classes[] = 'current-cat-parent'; } while ( $_current_term->parent ) { if ( $category->term_id == $_current_term->parent ) { $css_classes[] = 'current-cat-ancestor'; break; } $_current_term = get_term( $_current_term->parent, $category->taxonomy ); } } } /** * Filters the list of CSS classes to include with each category in the list. * * @since 4.2.0 * * @see wp_list_categories() * * @param array $css_classes An array of CSS classes to be applied to each list item. * @param object $category Category data object. * @param int $depth Depth of page, used for padding. * @param array $args An array of wp_list_categories() arguments. */ $css_classes = implode( ' ', apply_filters( 'category_css_class', $css_classes, $category, $depth, $args ) ); $css_classes = $css_classes ? ' class="' . esc_attr( $css_classes ) . '"' : ''; $output .= $css_classes; $output .= ">$link\n"; } elseif ( isset( $args['separator'] ) ) { $output .= "\t$link" . $args['separator'] . "\n"; } else { $output .= "\t$link<br />\n"; } } /** * Ends the element output, if needed. * * @since 2.1.0 * * @see Walker::end_el() * * @param string $output Used to append additional content (passed by reference). * @param object $page Not used. * @param int $depth Optional. Depth of category. Not used. * @param array $args Optional. An array of arguments. Only uses 'list' for whether should append * to output. See wp_list_categories(). Default empty array. */ public function end_el( &$output, $page, $depth = 0, $args = array() ) { if ( 'list' != $args['style'] ) { return; } $output .= "</li>\n"; } }
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