WordPress 4.4

[autoinstalls/wordpress.git] / wp-includes / class-walker-page-dropdown.php

diff --git a/wp-includes/class-walker-page-dropdown.php b/wp-includes/class-walker-page-dropdown.php
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+++ b/wp-includes/class-walker-page-dropdown.php
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+<?php
+/**
+ * Post API: Walker_PageDropdown class
+ *
+ * @package WordPress
+ * @subpackage Post
+ * @since 4.4.0
+ */
+
+/**
+ * Core class used to create an HTML drop-down list of pages.
+ *
+ * @since 2.1.0
+ *
+ * @see Walker
+ */
+class Walker_PageDropdown extends Walker {
+       /**
+        * @see Walker::$tree_type
+        * @since 2.1.0
+        * @var string
+        */
+       public $tree_type = 'page';
+
+       /**
+        * @see Walker::$db_fields
+        * @since 2.1.0
+        * @todo Decouple this
+        * @var array
+        */
+       public $db_fields = array ('parent' => 'post_parent', 'id' => 'ID');
+
+       /**
+        * @see Walker::start_el()
+        * @since 2.1.0
+        *
+        * @param string $output Passed by reference. Used to append additional content.
+        * @param object $page   Page data object.
+        * @param int    $depth  Depth of page in reference to parent pages. Used for padding.
+        * @param array  $args   Uses 'selected' argument for selected page to set selected HTML attribute for option
+        *                       element. Uses 'value_field' argument to fill "value" attribute. See {@see wp_dropdown_pages()}.
+        * @param int    $id
+        */
+       public function start_el( &$output, $page, $depth = 0, $args = array(), $id = 0 ) {
+               $pad = str_repeat('&nbsp;', $depth * 3);
+
+               if ( ! isset( $args['value_field'] ) || ! isset( $page->{$args['value_field']} ) ) {
+                       $args['value_field'] = 'ID';
+               }
+
+               $output .= "\t<option class=\"level-$depth\" value=\"" . esc_attr( $page->{$args['value_field']} ) . "\"";
+               if ( $page->ID == $args['selected'] )
+                       $output .= ' selected="selected"';
+               $output .= '>';
+
+               $title = $page->post_title;
+               if ( '' === $title ) {
+                       /* translators: %d: ID of a post */
+                       $title = sprintf( __( '#%d (no title)' ), $page->ID );
+               }
+
+               /**
+                * Filter the page title when creating an HTML drop-down list of pages.
+                *
+                * @since 3.1.0
+                *
+                * @param string $title Page title.
+                * @param object $page  Page data object.
+                */
+               $title = apply_filters( 'list_pages', $title, $page );
+               $output .= $pad . esc_html( $title );
+               $output .= "</option>\n";
+       }
+}