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231 lines
6.6 KiB
231 lines
6.6 KiB
<?php |
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/** |
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* Post API: Walker_Page 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 walker class used to create an HTML list of pages. |
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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_Page 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 $tree_type = 'page'; |
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/** |
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* Database fields to use. |
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* |
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* @since 2.1.0 |
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* @var array |
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* |
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* @see Walker::$db_fields |
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* @todo Decouple this. |
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*/ |
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public $db_fields = array( 'parent' => 'post_parent', 'id' => 'ID' ); |
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/** |
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* Outputs the beginning of the current level in the tree before elements are output. |
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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 page. Used for padding. Default 0. |
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* @param array $args Optional. Arguments for outputting the next level. |
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* Default empty array. |
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*/ |
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public function start_lvl( &$output, $depth = 0, $args = array() ) { |
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if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { |
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$t = "\t"; |
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$n = "\n"; |
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} else { |
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$t = ''; |
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$n = ''; |
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} |
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$indent = str_repeat( $t, $depth ); |
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$output .= "{$n}{$indent}<ul class='children'>{$n}"; |
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} |
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/** |
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* Outputs the end of the current level in the tree after elements are output. |
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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 page. Used for padding. Default 0. |
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* @param array $args Optional. Arguments for outputting the end of the current level. |
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* Default empty array. |
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*/ |
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public function end_lvl( &$output, $depth = 0, $args = array() ) { |
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if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { |
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$t = "\t"; |
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$n = "\n"; |
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} else { |
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$t = ''; |
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$n = ''; |
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} |
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$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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* Outputs the beginning of the current element in the tree. |
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* |
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* @see Walker::start_el() |
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* @since 2.1.0 |
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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_Post $page Page data object. |
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* @param int $depth Optional. Depth of page. Used for padding. Default 0. |
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* @param array $args Optional. Array of arguments. Default empty array. |
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* @param int $current_page Optional. Page ID. Default 0. |
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*/ |
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public function start_el( &$output, $page, $depth = 0, $args = array(), $current_page = 0 ) { |
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if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { |
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$t = "\t"; |
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$n = "\n"; |
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} else { |
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$t = ''; |
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$n = ''; |
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} |
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if ( $depth ) { |
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$indent = str_repeat( $t, $depth ); |
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} else { |
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$indent = ''; |
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} |
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$css_class = array( 'page_item', 'page-item-' . $page->ID ); |
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if ( isset( $args['pages_with_children'][ $page->ID ] ) ) { |
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$css_class[] = 'page_item_has_children'; |
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} |
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if ( ! empty( $current_page ) ) { |
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$_current_page = get_post( $current_page ); |
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if ( $_current_page && in_array( $page->ID, $_current_page->ancestors ) ) { |
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$css_class[] = 'current_page_ancestor'; |
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} |
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if ( $page->ID == $current_page ) { |
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$css_class[] = 'current_page_item'; |
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} elseif ( $_current_page && $page->ID == $_current_page->post_parent ) { |
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$css_class[] = 'current_page_parent'; |
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} |
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} elseif ( $page->ID == get_option('page_for_posts') ) { |
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$css_class[] = 'current_page_parent'; |
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} |
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/** |
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* Filters the list of CSS classes to include with each page item in the list. |
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* |
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* @since 2.8.0 |
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* |
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* @see wp_list_pages() |
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* |
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* @param array $css_class An array of CSS classes to be applied |
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* to each list item. |
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* @param WP_Post $page Page 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 arguments. |
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* @param int $current_page ID of the current page. |
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*/ |
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$css_classes = implode( ' ', apply_filters( 'page_css_class', $css_class, $page, $depth, $args, $current_page ) ); |
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if ( '' === $page->post_title ) { |
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/* translators: %d: ID of a post */ |
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$page->post_title = sprintf( __( '#%d (no title)' ), $page->ID ); |
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} |
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$args['link_before'] = empty( $args['link_before'] ) ? '' : $args['link_before']; |
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$args['link_after'] = empty( $args['link_after'] ) ? '' : $args['link_after']; |
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$atts = array(); |
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$atts['href'] = get_permalink( $page->ID ); |
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/** |
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* Filters the HTML attributes applied to a page menu item's anchor element. |
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* |
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* @since 4.8.0 |
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* |
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* @param array $atts { |
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* The HTML attributes applied to the menu 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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* } |
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* @param WP_Post $page Page 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 arguments. |
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* @param int $current_page ID of the current page. |
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*/ |
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$atts = apply_filters( 'page_menu_link_attributes', $atts, $page, $depth, $args, $current_page ); |
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$attributes = ''; |
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foreach ( $atts as $attr => $value ) { |
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if ( ! empty( $value ) ) { |
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$value = esc_attr( $value ); |
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$attributes .= ' ' . $attr . '="' . $value . '"'; |
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} |
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} |
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$output .= $indent . sprintf( |
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'<li class="%s"><a%s>%s%s%s</a>', |
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$css_classes, |
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$attributes, |
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$args['link_before'], |
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/** This filter is documented in wp-includes/post-template.php */ |
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apply_filters( 'the_title', $page->post_title, $page->ID ), |
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$args['link_after'] |
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); |
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if ( ! empty( $args['show_date'] ) ) { |
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if ( 'modified' == $args['show_date'] ) { |
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$time = $page->post_modified; |
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} else { |
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$time = $page->post_date; |
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} |
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$date_format = empty( $args['date_format'] ) ? '' : $args['date_format']; |
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$output .= " " . mysql2date( $date_format, $time ); |
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} |
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} |
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/** |
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* Outputs the end of the current element in the tree. |
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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 WP_Post $page Page data object. Not used. |
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* @param int $depth Optional. Depth of page. Default 0 (unused). |
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* @param array $args Optional. Array of arguments. Default empty array. |
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*/ |
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public function end_el( &$output, $page, $depth = 0, $args = array() ) { |
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if ( isset( $args['item_spacing'] ) && 'preserve' === $args['item_spacing'] ) { |
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$t = "\t"; |
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$n = "\n"; |
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} else { |
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$t = ''; |
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$n = ''; |
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} |
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$output .= "</li>{$n}"; |
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} |
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}
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