angelovcom.net

class-walker-category.php (7893B)

---

 <?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 WP_Term $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 wp-includes/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;
 		}
 
 		$atts         = array();
 		$atts['href'] = 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 WP_Term $category    Category object.
 			 */
 			$atts['title'] = strip_tags( apply_filters( 'category_description', $category->description, $category ) );
 		}
 
 		/**
 		 * Filters the HTML attributes applied to a category list item's anchor element.
 		 *
 		 * @since 5.2.0
 		 *
 		 * @param array   $atts {
 		 *     The HTML attributes applied to the list item's `<a>` element, empty strings are ignored.
 		 *
 		 *     @type string $href  The href attribute.
 		 *     @type string $title The title attribute.
 		 * }
 		 * @param WP_Term $category Term data object.
 		 * @param int     $depth    Depth of category, used for padding.
 		 * @param array   $args     An array of arguments.
 		 * @param int     $id       ID of the current category.
 		 */
 		$atts = apply_filters( 'category_list_link_attributes', $atts, $category, $depth, $args, $id );
 
 		$attributes = '';
 		foreach ( $atts as $attr => $value ) {
 			if ( is_scalar( $value ) && '' !== $value && false !== $value ) {
 				$value       = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
 				$attributes .= ' ' . $attr . '="' . $value . '"';
 			}
 		}
 
 		$link = sprintf(
 			'<a%s>%s</a>',
 			$attributes,
 			$cat_name
 		);
 
 		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'] ) ) {
 				/* translators: %s: Category name. */
 				$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(
 					array(
 						'taxonomy'   => $category->taxonomy,
 						'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';
 						$link          = str_replace( '<a', '<a aria-current="page"', $link );
 					} 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 string[] $css_classes An array of CSS classes to be applied to each list item.
 			 * @param WP_Term  $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";
 	}
 
 }