Ticket #19867: 19867.diff

src/wp-includes/user.php

@@ -1163 +1163 @@
                 'include' => '', 'exclude' => '', 'multi' => 0,
                 'show' => 'display_name', 'echo' => 1,
                 'selected' => 0, 'name' => 'user', 'class' => '', 'id' => '',
-                'blog_id' => $GLOBALS['blog_id'], 'who' => '', 'include_selected' => false
+                'blog_id' => $GLOBALS['blog_id'], 'who' => '', 'include_selected' => false,
+                'autocomplete' => false
         );
 
         $defaults['selected'] = is_author() ? get_query_var( 'author' ) : 0;
@@ -1175 +1176 @@
         $query_args['fields'] = array( 'ID', 'user_login', $show );
         $users = get_users( $query_args );
 
+        /**
+         * !!!!!!!
+         *
+         * wp_dropdown_users() defaults to using jQuery UI autocomplete in the admin
+         * when there are over 100 users. To use autocomplete on the front-end,
+         * set the arg to true when calling the function.
+         *
+         * @since 3.9.0
+         * @param bool  $autocomplete Whether or not to use autocomplete for the dropdown.
+         * @param array $users        The results of the get_users() call. Most useful for count().
+         * @param array $args         The passed args to wp_dropdown_users().
+         */
+        if ( is_admin() ) {
+                $autocomplete = apply_filters( 'admin_user_dropdown_autocomplete', count( $users ) > 100, $users, $args );
+        }
+
         $output = '';
         if ( !empty($users) && ( empty($hide_if_only_one_author) || count($users) > 1 ) ) {
                 $name = esc_attr( $name );
@@ -1183 +1200 @@
                 else
                         $id = $id ? " id='" . esc_attr( $id ) . "'" : " id='$name'";
 
-                $output = "<select name='{$name}'{$id} class='$class'>\n";
+                if ( $autocomplete ) {
+                        wp_enqueue_script( 'user-suggest' );
 
-                if ( $show_option_all )
-                        $output .= "\t<option value='0'>$show_option_all</option>\n";
+                        $display = '';
 
-                if ( $show_option_none ) {
-                        $_selected = selected( -1, $selected, false );
-                        $output .= "\t<option value='-1'$_selected>$show_option_none</option>\n";
-                }
+                        if ( $selected > 0 ) {
+                                $user = get_user_by( 'id', $selected );
+                                $display = ! empty( $user->$show ) ? $user->$show : '('. $user->user_login . ')';
+                        }
 
-                $found_selected = false;
-                foreach ( (array) $users as $user ) {
-                        $user->ID = (int) $user->ID;
-                        $_selected = selected( $user->ID, $selected, false );
-                        if ( $_selected )
-                                $found_selected = true;
-                        $display = !empty($user->$show) ? $user->$show : '('. $user->user_login . ')';
-                        $output .= "\t<option value='$user->ID'$_selected>" . esc_html($display) . "</option>\n";
-                }
+                        $output = "<input type='text' name='{$name}'{$id} class='$class wp-suggest-user' data-autocomplete-type='search' data-autocomplete-field='user_id' value='{$selected}' />\n";
 
-                if ( $include_selected && ! $found_selected && ( $selected > 0 ) ) {
-                        $user = get_userdata( $selected );
-                        $_selected = selected( $user->ID, $selected, false );
-                        $display = !empty($user->$show) ? $user->$show : '('. $user->user_login . ')';
-                        $output .= "\t<option value='$user->ID'$_selected>" . esc_html($display) . "</option>\n";
+                        $output .= "<input type='text' class='wp-suggest-user-overlay hide-if-no-js' value='{$display}' />";
+                } else {
+                        $output = "<select name='{$name}'{$id} class='$class'>\n";
+
+                        if ( $show_option_all )
+                                $output .= "\t<option value='0'>$show_option_all</option>\n";
+
+                        if ( $show_option_none ) {
+                                $_selected = selected( -1, $selected, false );
+                                $output .= "\t<option value='-1'$_selected>$show_option_none</option>\n";
+                        }
+
+                        $found_selected = false;
+                        foreach ( (array) $users as $user ) {
+                                $user->ID = (int) $user->ID;
+                                $_selected = selected( $user->ID, $selected, false );
+                                if ( $_selected )
+                                        $found_selected = true;
+                                $display = !empty($user->$show) ? $user->$show : '('. $user->user_login . ')';
+                                $output .= "\t<option value='$user->ID'$_selected>" . esc_html($display) . "</option>\n";
+                        }
+
+                        if ( $include_selected && ! $found_selected && ( $selected > 0 ) ) {
+                                $user = get_userdata( $selected );
+                                $_selected = selected( $user->ID, $selected, false );
+                                $display = !empty($user->$show) ? $user->$show : '('. $user->user_login . ')';
+                                $output .= "\t<option value='$user->ID'$_selected>" . esc_html($display) . "</option>\n";
+                        }
+
+                        $output .= "</select>";
                 }
-
-                $output .= "</select>";
         }
 
         /**