226 lines
6.2 KiB
PHP
226 lines
6.2 KiB
PHP
<?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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* @see Walker::$tree_type
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* @since 2.1.0
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* @var string
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*/
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public $tree_type = 'category';
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/**
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* Database fields to use.
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*
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* @see Walker::$db_fields
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* @since 2.1.0
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* @todo Decouple this
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* @var array
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*/
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public $db_fields = array ('parent' => 'parent', 'id' => 'term_id');
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/**
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* Starts the list before the elements are added.
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*
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* @see Walker::start_lvl()
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*
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* @since 2.1.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param int $depth Depth of category. Used for tab indentation.
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* @param array $args An array of arguments. Will only append content if style argument value is 'list'.
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* @see wp_list_categories()
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*/
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public function start_lvl( &$output, $depth = 0, $args = array() ) {
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if ( 'list' != $args['style'] )
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return;
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$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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* @see Walker::end_lvl()
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*
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* @since 2.1.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param int $depth Depth of category. Used for tab indentation.
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* @param array $args An array of arguments. Will only append content if style argument value is 'list'.
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* @wsee wp_list_categories()
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*/
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public function end_lvl( &$output, $depth = 0, $args = array() ) {
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if ( 'list' != $args['style'] )
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return;
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$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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* Start the element output.
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*
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* @see Walker::start_el()
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*
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* @since 2.1.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param object $category Category data object.
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* @param int $depth Depth of category in reference to parents. Default 0.
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* @param array $args An array of arguments. @see wp_list_categories()
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* @param int $id ID of the current category.
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*/
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public function start_el( &$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(
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'list_cats',
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esc_attr( $category->name ),
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$category
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);
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// Don't generate an element if the category name is empty.
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if ( ! $cat_name ) {
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return;
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}
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$link = '<a href="' . esc_url( 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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* Filter 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 $category Category object.
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*/
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$link .= 'title="' . esc_attr( strip_tags( apply_filters( 'category_description', $category->description, $category ) ) ) . '"';
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}
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$link .= '>';
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$link .= $cat_name . '</a>';
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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( $args['feed'] ) ) {
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$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='" . $args['feed_image'] . "'$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( $category->taxonomy, array(
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'include' => $args['current_category'],
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'hide_empty' => false,
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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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} 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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* Filter 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, $args ) );
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$output .= ' class="' . $css_classes . '"';
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$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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* @see Walker::end_el()
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*
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* @since 2.1.0
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*
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* @param string $output Passed by reference. Used to append additional content.
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* @param object $page Not used.
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* @param int $depth Depth of category. Not used.
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* @param array $args An array of arguments. Only uses 'list' for whether should append to output. @see wp_list_categories()
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*/
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public function end_el( &$output, $page, $depth = 0, $args = array() ) {
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if ( 'list' != $args['style'] )
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return;
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$output .= "</li>\n";
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}
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}
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