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268 lines
7.7 KiB
268 lines
7.7 KiB
<?php |
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/** |
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* Taxonomy API: Walker_Category class |
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* |
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* @package WordPress |
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* @subpackage Template |
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* @since 4.4.0 |
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*/ |
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/** |
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* Core class used to create an HTML list of categories. |
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* |
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* @since 2.1.0 |
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* |
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* @see Walker |
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*/ |
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class Walker_Category extends Walker { |
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/** |
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* What the class handles. |
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* |
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* @since 2.1.0 |
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* @var string |
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* |
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* @see Walker::$tree_type |
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*/ |
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public $tree_type = 'category'; |
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/** |
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* Database fields to use. |
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* |
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* @since 2.1.0 |
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* @var array |
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* |
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* @see Walker::$db_fields |
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* @todo Decouple this |
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*/ |
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public $db_fields = array( |
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'parent' => 'parent', |
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'id' => 'term_id', |
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); |
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/** |
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* Starts the list before the elements are added. |
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* |
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* @since 2.1.0 |
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* |
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* @see Walker::start_lvl() |
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* |
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* @param string $output Used to append additional content. Passed by reference. |
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* @param int $depth Optional. Depth of category. Used for tab indentation. Default 0. |
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* @param array $args Optional. An array of arguments. Will only append content if style argument |
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* value is 'list'. See wp_list_categories(). Default empty array. |
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*/ |
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public function start_lvl( &$output, $depth = 0, $args = array() ) { |
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if ( 'list' != $args['style'] ) { |
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return; |
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} |
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$indent = str_repeat( "\t", $depth ); |
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$output .= "$indent<ul class='children'>\n"; |
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} |
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/** |
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* Ends the list of after the elements are added. |
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* |
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* @since 2.1.0 |
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* |
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* @see Walker::end_lvl() |
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* |
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* @param string $output Used to append additional content. Passed by reference. |
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* @param int $depth Optional. Depth of category. Used for tab indentation. Default 0. |
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* @param array $args Optional. An array of arguments. Will only append content if style argument |
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* value is 'list'. See wp_list_categories(). Default empty array. |
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*/ |
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public function end_lvl( &$output, $depth = 0, $args = array() ) { |
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if ( 'list' != $args['style'] ) { |
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return; |
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} |
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$indent = str_repeat( "\t", $depth ); |
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$output .= "$indent</ul>\n"; |
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} |
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/** |
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* Starts the element output. |
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* |
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* @since 2.1.0 |
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* |
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* @see Walker::start_el() |
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* |
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* @param string $output Used to append additional content (passed by reference). |
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* @param object $category Category data object. |
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* @param int $depth Optional. Depth of category in reference to parents. Default 0. |
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* @param array $args Optional. An array of arguments. See wp_list_categories(). Default empty array. |
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* @param int $id Optional. ID of the current category. Default 0. |
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*/ |
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public function start_el( &$output, $category, $depth = 0, $args = array(), $id = 0 ) { |
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/** This filter is documented in wp-includes/category-template.php */ |
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$cat_name = apply_filters( 'list_cats', esc_attr( $category->name ), $category ); |
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// Don't generate an element if the category name is empty. |
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if ( '' === $cat_name ) { |
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return; |
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} |
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$atts = array(); |
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$atts['href'] = get_term_link( $category ); |
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if ( $args['use_desc_for_title'] && ! empty( $category->description ) ) { |
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/** |
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* Filters the category description for display. |
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* |
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* @since 1.2.0 |
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* |
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* @param string $description Category description. |
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* @param object $category Category object. |
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*/ |
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$atts['title'] = strip_tags( apply_filters( 'category_description', $category->description, $category ) ); |
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} |
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/** |
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* Filters the HTML attributes applied to a category list item's anchor element. |
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* |
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* @since 5.2.0 |
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* |
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* @param array $atts { |
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* The HTML attributes applied to the list item's `<a>` element, empty strings are ignored. |
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* |
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* @type string $href The href attribute. |
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* @type string $title The title attribute. |
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* } |
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* @param WP_Term $category Term data object. |
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* @param int $depth Depth of category, used for padding. |
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* @param array $args An array of arguments. |
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* @param int $id ID of the current category. |
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*/ |
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$atts = apply_filters( 'category_list_link_attributes', $atts, $category, $depth, $args, $id ); |
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$attributes = ''; |
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foreach ( $atts as $attr => $value ) { |
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if ( is_scalar( $value ) && '' !== $value && false !== $value ) { |
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$value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value ); |
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$attributes .= ' ' . $attr . '="' . $value . '"'; |
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} |
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} |
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$link = sprintf( |
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'<a%s>%s</a>', |
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$attributes, |
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$cat_name |
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); |
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if ( ! empty( $args['feed_image'] ) || ! empty( $args['feed'] ) ) { |
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$link .= ' '; |
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if ( empty( $args['feed_image'] ) ) { |
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$link .= '('; |
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} |
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$link .= '<a href="' . esc_url( get_term_feed_link( $category->term_id, $category->taxonomy, $args['feed_type'] ) ) . '"'; |
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if ( empty( $args['feed'] ) ) { |
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/* translators: %s: Category name. */ |
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$alt = ' alt="' . sprintf( __( 'Feed for all posts filed under %s' ), $cat_name ) . '"'; |
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} else { |
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$alt = ' alt="' . $args['feed'] . '"'; |
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$name = $args['feed']; |
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$link .= empty( $args['title'] ) ? '' : $args['title']; |
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} |
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$link .= '>'; |
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if ( empty( $args['feed_image'] ) ) { |
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$link .= $name; |
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} else { |
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$link .= "<img src='" . esc_url( $args['feed_image'] ) . "'$alt" . ' />'; |
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} |
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$link .= '</a>'; |
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if ( empty( $args['feed_image'] ) ) { |
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$link .= ')'; |
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} |
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} |
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if ( ! empty( $args['show_count'] ) ) { |
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$link .= ' (' . number_format_i18n( $category->count ) . ')'; |
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} |
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if ( 'list' == $args['style'] ) { |
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$output .= "\t<li"; |
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$css_classes = array( |
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'cat-item', |
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'cat-item-' . $category->term_id, |
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); |
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if ( ! empty( $args['current_category'] ) ) { |
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// 'current_category' can be an array, so we use `get_terms()`. |
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$_current_terms = get_terms( |
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array( |
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'taxonomy' => $category->taxonomy, |
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'include' => $args['current_category'], |
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'hide_empty' => false, |
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) |
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); |
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foreach ( $_current_terms as $_current_term ) { |
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if ( $category->term_id == $_current_term->term_id ) { |
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$css_classes[] = 'current-cat'; |
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$link = str_replace( '<a', '<a aria-current="page"', $link ); |
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} elseif ( $category->term_id == $_current_term->parent ) { |
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$css_classes[] = 'current-cat-parent'; |
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} |
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while ( $_current_term->parent ) { |
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if ( $category->term_id == $_current_term->parent ) { |
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$css_classes[] = 'current-cat-ancestor'; |
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break; |
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} |
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$_current_term = get_term( $_current_term->parent, $category->taxonomy ); |
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} |
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} |
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} |
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/** |
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* Filters the list of CSS classes to include with each category in the list. |
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* |
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* @since 4.2.0 |
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* |
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* @see wp_list_categories() |
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* |
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* @param array $css_classes An array of CSS classes to be applied to each list item. |
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* @param object $category Category data object. |
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* @param int $depth Depth of page, used for padding. |
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* @param array $args An array of wp_list_categories() arguments. |
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*/ |
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$css_classes = implode( ' ', apply_filters( 'category_css_class', $css_classes, $category, $depth, $args ) ); |
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$css_classes = $css_classes ? ' class="' . esc_attr( $css_classes ) . '"' : ''; |
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$output .= $css_classes; |
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$output .= ">$link\n"; |
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} elseif ( isset( $args['separator'] ) ) { |
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$output .= "\t$link" . $args['separator'] . "\n"; |
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} else { |
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$output .= "\t$link<br />\n"; |
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} |
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} |
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/** |
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* Ends the element output, if needed. |
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* |
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* @since 2.1.0 |
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* |
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* @see Walker::end_el() |
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* |
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* @param string $output Used to append additional content (passed by reference). |
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* @param object $page Not used. |
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* @param int $depth Optional. Depth of category. Not used. |
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* @param array $args Optional. An array of arguments. Only uses 'list' for whether should append |
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* to output. See wp_list_categories(). Default empty array. |
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*/ |
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public function end_el( &$output, $page, $depth = 0, $args = array() ) { |
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if ( 'list' != $args['style'] ) { |
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return; |
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} |
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$output .= "</li>\n"; |
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} |
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}
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