279 lines
8.3 KiB
PHP
279 lines
8.3 KiB
PHP
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<?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 $tree_type = 'category';
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/**
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* Database fields to use.
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*
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* @since 2.1.0
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* @var string[]
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*
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* @see Walker::$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 .= "$indent</ul>\n";
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}
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/**
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* Starts the element output.
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*
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* @since 2.1.0
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* @since 5.9.0 Renamed `$category` to `$data_object` and `$id` to `$current_object_id`
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* to match parent class for PHP 8 named parameter support.
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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 WP_Term $data_object 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().
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* Default empty array.
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* @param int $current_object_id Optional. ID of the current category. Default 0.
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*/
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public function start_el( &$output, $data_object, $depth = 0, $args = array(), $current_object_id = 0 ) {
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// Restores the more descriptive, specific name for use within this method.
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$category = $data_object;
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/** This filter is documented in wp-includes/category-template.php */
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$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 WP_Term $category Category object.
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*/
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$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 $current_object_id ID of the current category.
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*/
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$atts = apply_filters( 'category_list_link_attributes', $atts, $category, $depth, $args, $current_object_id );
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$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, $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 string[] $css_classes An array of CSS classes to be applied to each list item.
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* @param WP_Term $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$link<br />\n";
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}
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}
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/**
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* Ends the element output, if needed.
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*
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* @since 2.1.0
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* @since 5.9.0 Renamed `$page` to `$data_object` to match parent class for PHP 8 named parameter support.
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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 $data_object Category data object. Not used.
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* @param int $depth Optional. Depth of category. Not used.
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* @param array $args Optional. An array of arguments. Only uses 'list' for whether should
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* append to output. See wp_list_categories(). Default empty array.
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*/
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public function end_el( &$output, $data_object, $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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