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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 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;
		}

$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='" . $args['feed_image'] . "'$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 ) );

$output .=  ' class="' . $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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[-] post-template.php [open]
[-] class-wp-metadata-lazyloader.php [open]
[-] feed-rss.php [open]
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[-] locale.php [open]
[-] class-wp-xmlrpc-server.php [open]
[-] template-loader.php [open]
[-] pluggable.php [open]
[+] SimplePie
[-] cache.php [open]
[-] spl-autoload-compat.php [open]
[-] cron.php [open]
[-] class-wp-feed-cache-transient.php [open]
[-] ms-load.php [open]
[-] ms-functions.php [open]
[-] class-simplepie.php [open]
[-] class-wp-term.php [open]
[-] class-IXR.php [open]
[-] meta.php [open]
[+] images
[-] default-filters.php [open]
[-] bookmark-template.php [open]
[-] class-wp-site.php [open]
[-] class-oembed.php [open]
[-] class-wp-customize-section.php [open]
[+] css
[-] embed.php [open]
[-] class-wp-http-streams.php [open]
[-] class-walker-page.php [open]
[-] functions.wp-scripts.php [open]
[-] default-widgets.php [open]
[-] class-wp-locale-switcher.php [open]
[-] date.php [open]
[-] class-wp-widget-factory.php [open]
[-] functions.php [open]
[-] class-walker-category.php [open]
[-] class-wp-dependency.php [open]
[+] ID3
[-] version.php [open]
[-] class-smtp.php [open]
[-] class-wp-network.php [open]
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[-] update.php [open]
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[-] class-wp-http-ixr-client.php [open]
[-] class-wp-post.php [open]
[-] query.php [open]
[-] functions.wp-styles.php [open]
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[-] atomlib.php [open]
[-] general-template.php [open]
[-] class-wp-image-editor-gd.php [open]
[-] feed-atom-comments.php [open]
[-] class-wp-text-diff-renderer-inline.php [open]
[-] nav-menu-template.php [open]
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[-] session.php [open]
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[-] deprecated.php [open]
[-] registration-functions.php [open]
[-] ms-settings.php [open]
[-] wp-diff.php [open]
[-] category-template.php [open]
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[+] fonts
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[-] script-loader.php [open]
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[-] ms-deprecated.php [open]
[-] bookmark.php [open]
[-] class-walker-category-dropdown.php [open]
[-] class-wp-site-query.php [open]
[-] class-wp-customize-control.php [open]
[-] class-wp-query.php [open]
[-] rss-functions.php [open]
[-] canonical.php [open]
[+] js
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[-] vars.php [open]
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[-] author-template.php [open]
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[-] plugin.php [open]
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[-] wp-db.php [open]
[-] registration.php [open]
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[+] Text
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[+] customize
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[-] post.php [open]
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[+] IXR
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[+] theme-compat
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[-] class-wp-error.php [open]
[-] class-requests.php [open]
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[-] compat.php [open]
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[-] class-wp-hook.php [open]
[+] Requests
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[-] class-walker-comment.php [open]
[-] feed-rdf.php [open]
[-] class-wp-comment.php [open]
[-] class-wp-customize-manager.php [open]
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[-] class-feed.php [open]
[-] media.php [open]
[-] class-phpass.php [open]
[-] feed-rss2.php [open]