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Ticket #34353: nav-menu-template.php

File nav-menu-template.php, 24.5 KB (added by theamila, 11 years ago)

nav menu template file

Line 
1<?php
2/**
3 * Navigation Menu template functions
4 *
5 * @package WordPress
6 * @subpackage Nav_Menus
7 * @since 3.0.0
8 */
9
10/**
11 * Create HTML list of nav menu items.
12 *
13 * @since 3.0.0
14 * @uses Walker
15 */
16class Walker_Nav_Menu extends Walker {
17 /**
18 * What the class handles.
19 *
20 * @see Walker::$tree_type
21 * @since 3.0.0
22 * @var string
23 */
24 public $tree_type = array( 'post_type', 'taxonomy', 'custom' );
25
26 /**
27 * Database fields to use.
28 *
29 * @see Walker::$db_fields
30 * @since 3.0.0
31 * @todo Decouple this.
32 * @var array
33 */
34 public $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' );
35
36 /**
37 * Starts the list before the elements are added.
38 *
39 * @see Walker::start_lvl()
40 *
41 * @since 3.0.0
42 *
43 * @param string $output Passed by reference. Used to append additional content.
44 * @param int $depth Depth of menu item. Used for padding.
45 * @param array $args An array of arguments. @see wp_nav_menu()
46 */
47 public function start_lvl( &$output, $depth = 0, $args = array() ) {
48 $indent = str_repeat("\t", $depth);
49 $output .= "\n$indent<ul class=\"sub-menu\">\n";
50 }
51
52 /**
53 * Ends the list of after the elements are added.
54 *
55 * @see Walker::end_lvl()
56 *
57 * @since 3.0.0
58 *
59 * @param string $output Passed by reference. Used to append additional content.
60 * @param int $depth Depth of menu item. Used for padding.
61 * @param array $args An array of arguments. @see wp_nav_menu()
62 */
63 public function end_lvl( &$output, $depth = 0, $args = array() ) {
64 $indent = str_repeat("\t", $depth);
65 $output .= "$indent</ul>\n";
66 }
67
68 /**
69 * Start the element output.
70 *
71 * @see Walker::start_el()
72 *
73 * @since 3.0.0
74 *
75 * @param string $output Passed by reference. Used to append additional content.
76 * @param object $item Menu item data object.
77 * @param int $depth Depth of menu item. Used for padding.
78 * @param array $args An array of arguments. @see wp_nav_menu()
79 * @param int $id Current item ID.
80 */
81 public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
82 $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
83
84 $classes = empty( $item->classes ) ? array() : (array) $item->classes;
85 $classes[] = 'menu-item-' . $item->ID;
86
87 /**
88 * Filter the CSS class(es) applied to a menu item's list item element.
89 *
90 * @since 3.0.0
91 * @since 4.1.0 The `$depth` parameter was added.
92 *
93 * @param array $classes The CSS classes that are applied to the menu item's `<li>` element.
94 * @param object $item The current menu item.
95 * @param array $args An array of {@see wp_nav_menu()} arguments.
96 * @param int $depth Depth of menu item. Used for padding.
97 */
98 $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) );
99 $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';
100
101 /**
102 * Filter the ID applied to a menu item's list item element.
103 *
104 * @since 3.0.1
105 * @since 4.1.0 The `$depth` parameter was added.
106 *
107 * @param string $menu_id The ID that is applied to the menu item's `<li>` element.
108 * @param object $item The current menu item.
109 * @param array $args An array of {@see wp_nav_menu()} arguments.
110 * @param int $depth Depth of menu item. Used for padding.
111 */
112 $id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args, $depth );
113 $id = $id ? ' id="' . esc_attr( $id ) . '"' : '';
114
115 $output .= $indent . '<li' . $id . $class_names .'>';
116
117 $atts = array();
118 $atts['title'] = ! empty( $item->attr_title ) ? $item->attr_title : '';
119 $atts['target'] = ! empty( $item->target ) ? $item->target : '';
120 $atts['rel'] = ! empty( $item->xfn ) ? $item->xfn : '';
121 $atts['href'] = ! empty( $item->url ) ? $item->url : '';
122
123 /**
124 * Filter the HTML attributes applied to a menu item's anchor element.
125 *
126 * @since 3.6.0
127 * @since 4.1.0 The `$depth` parameter was added.
128 *
129 * @param array $atts {
130 * The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
131 *
132 * @type string $title Title attribute.
133 * @type string $target Target attribute.
134 * @type string $rel The rel attribute.
135 * @type string $href The href attribute.
136 * }
137 * @param object $item The current menu item.
138 * @param array $args An array of {@see wp_nav_menu()} arguments.
139 * @param int $depth Depth of menu item. Used for padding.
140 */
141 $atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args, $depth );
142
143 $attributes = '';
144 foreach ( $atts as $attr => $value ) {
145 if ( ! empty( $value ) ) {
146 $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
147 $attributes .= ' ' . $attr . '="' . $value . '"';
148 }
149 }
150
151 $item_output = $args->before;
152 $item_output .= '<a'. $attributes .'>';
153 /** This filter is documented in wp-includes/post-template.php */
154 $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
155 $item_output .= '</a>';
156 $item_output .= $args->after;
157
158 /**
159 * Filter a menu item's starting output.
160 *
161 * The menu item's starting output only includes `$args->before`, the opening `<a>`,
162 * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
163 * no filter for modifying the opening and closing `<li>` for a menu item.
164 *
165 * @since 3.0.0
166 *
167 * @param string $item_output The menu item's starting HTML output.
168 * @param object $item Menu item data object.
169 * @param int $depth Depth of menu item. Used for padding.
170 * @param array $args An array of {@see wp_nav_menu()} arguments.
171 */
172 $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
173 }
174
175 /**
176 * Ends the element output, if needed.
177 *
178 * @see Walker::end_el()
179 *
180 * @since 3.0.0
181 *
182 * @param string $output Passed by reference. Used to append additional content.
183 * @param object $item Page data object. Not used.
184 * @param int $depth Depth of page. Not Used.
185 * @param array $args An array of arguments. @see wp_nav_menu()
186 */
187 public function end_el( &$output, $item, $depth = 0, $args = array() ) {
188 $output .= "</li>\n";
189 }
190
191} // Walker_Nav_Menu
192
193/**
194 * Displays a navigation menu.
195 *
196 * @since 3.0.0
197 *
198 * @staticvar array $menu_id_slugs
199 *
200 * @param array $args {
201 * Optional. Array of nav menu arguments.
202 *
203 * @type string $menu Desired menu. Accepts (matching in order) id, slug, name. Default empty.
204 * @type string $menu_class CSS class to use for the ul element which forms the menu. Default 'menu'.
205 * @type string $menu_id The ID that is applied to the ul element which forms the menu.
206 * Default is the menu slug, incremented.
207 * @type string $container Whether to wrap the ul, and what to wrap it with. Default 'div'.
208 * @type string $container_class Class that is applied to the container. Default 'menu-{menu slug}-container'.
209 * @type string $container_id The ID that is applied to the container. Default empty.
210 * @type callback|bool $fallback_cb If the menu doesn't exists, a callback function will fire.
211 * Default is 'wp_page_menu'. Set to false for no fallback.
212 * @type string $before Text before the link text. Default empty.
213 * @type string $after Text after the link text. Default empty.
214 * @type string $link_before Text before the link. Default empty.
215 * @type string $link_after Text after the link. Default empty.
216 * @type bool $echo Whether to echo the menu or return it. Default true.
217 * @type int $depth How many levels of the hierarchy are to be included. 0 means all. Default 0.
218 * @type object $walker Instance of a custom walker class. Default empty.
219 * @type string $theme_location Theme location to be used. Must be registered with register_nav_menu()
220 * in order to be selectable by the user.
221 * @type string $items_wrap How the list items should be wrapped. Default is a ul with an id and class.
222 * Uses printf() format with numbered placeholders.
223 * }
224 * @return object|false|void Menu output if $echo is false, false if there are no items or no menu was found.
225 */
226function wp_nav_menu( $args = array() ) {
227 static $menu_id_slugs = array();
228
229 $defaults = array( 'menu' => '', 'container' => 'div', 'container_class' => '', 'container_id' => '', 'menu_class' => 'menu', 'menu_id' => '',
230 'echo' => true, 'fallback_cb' => 'wp_page_menu', 'before' => '', 'after' => '', 'link_before' => '', 'link_after' => '', 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>',
231 'depth' => 0, 'walker' => '', 'theme_location' => '' );
232
233 $args = wp_parse_args( $args, $defaults );
234 /**
235 * Filter the arguments used to display a navigation menu.
236 *
237 * @since 3.0.0
238 *
239 * @see wp_nav_menu()
240 *
241 * @param array $args Array of wp_nav_menu() arguments.
242 */
243 $args = apply_filters( 'wp_nav_menu_args', $args );
244 $args = (object) $args;
245
246 /**
247 * Filter whether to short-circuit the wp_nav_menu() output.
248 *
249 * Returning a non-null value to the filter will short-circuit
250 * wp_nav_menu(), echoing that value if $args->echo is true,
251 * returning that value otherwise.
252 *
253 * @since 3.9.0
254 *
255 * @see wp_nav_menu()
256 *
257 * @param string|null $output Nav menu output to short-circuit with. Default null.
258 * @param object $args An object containing wp_nav_menu() arguments.
259 */
260 $nav_menu = apply_filters( 'pre_wp_nav_menu', null, $args );
261
262 if ( null !== $nav_menu ) {
263 if ( $args->echo ) {
264 echo $nav_menu;
265 return;
266 }
267
268 return $nav_menu;
269 }
270
271 // Get the nav menu based on the requested menu
272 $menu = wp_get_nav_menu_object( $args->menu );
273
274 // Get the nav menu based on the theme_location
275 if ( ! $menu && $args->theme_location && ( $locations = get_nav_menu_locations() ) && isset( $locations[ $args->theme_location ] ) )
276 $menu = wp_get_nav_menu_object( $locations[ $args->theme_location ] );
277
278 // get the first menu that has items if we still can't find a menu
279 if ( ! $menu && !$args->theme_location ) {
280 $menus = wp_get_nav_menus();
281 foreach ( $menus as $menu_maybe ) {
282 if ( $menu_items = wp_get_nav_menu_items( $menu_maybe->term_id, array( 'update_post_term_cache' => false ) ) ) {
283 $menu = $menu_maybe;
284 break;
285 }
286 }
287 }
288
289 if ( empty( $args->menu ) ) {
290 $args->menu = $menu;
291 }
292
293 // If the menu exists, get its items.
294 if ( $menu && ! is_wp_error($menu) && !isset($menu_items) )
295 $menu_items = wp_get_nav_menu_items( $menu->term_id, array( 'update_post_term_cache' => false ) );
296
297 /*
298 * If no menu was found:
299 * - Fall back (if one was specified), or bail.
300 *
301 * If no menu items were found:
302 * - Fall back, but only if no theme location was specified.
303 * - Otherwise, bail.
304 */
305 if ( ( !$menu || is_wp_error($menu) || ( isset($menu_items) && empty($menu_items) && !$args->theme_location ) )
306 && isset( $args->fallback_cb ) && $args->fallback_cb && is_callable( $args->fallback_cb ) )
307 return call_user_func( $args->fallback_cb, (array) $args );
308
309 if ( ! $menu || is_wp_error( $menu ) )
310 return false;
311
312 $nav_menu = $items = '';
313
314 $show_container = false;
315 if ( $args->container ) {
316 /**
317 * Filter the list of HTML tags that are valid for use as menu containers.
318 *
319 * @since 3.0.0
320 *
321 * @param array $tags The acceptable HTML tags for use as menu containers.
322 * Default is array containing 'div' and 'nav'.
323 */
324 $allowed_tags = apply_filters( 'wp_nav_menu_container_allowedtags', array( 'div', 'nav' ) );
325 if ( in_array( $args->container, $allowed_tags ) ) {
326 $show_container = true;
327 $class = $args->container_class ? ' class="' . esc_attr( $args->container_class ) . '"' : ' class="menu-'. $menu->slug .'-container"';
328 $id = $args->container_id ? ' id="' . esc_attr( $args->container_id ) . '"' : '';
329 $nav_menu .= '<'. $args->container . $id . $class . '>';
330 }
331 }
332
333 // Set up the $menu_item variables
334 _wp_menu_item_classes_by_context( $menu_items );
335
336 $sorted_menu_items = $menu_items_with_children = array();
337 foreach ( (array) $menu_items as $menu_item ) {
338 $sorted_menu_items[ $menu_item->menu_order ] = $menu_item;
339 if ( $menu_item->menu_item_parent )
340 $menu_items_with_children[ $menu_item->menu_item_parent ] = true;
341 }
342
343 // Add the menu-item-has-children class where applicable
344 if ( $menu_items_with_children ) {
345 foreach ( $sorted_menu_items as &$menu_item ) {
346 if ( isset( $menu_items_with_children[ $menu_item->ID ] ) )
347 $menu_item->classes[] = 'menu-item-has-children';
348 }
349 }
350
351 unset( $menu_items, $menu_item );
352
353 /**
354 * Filter the sorted list of menu item objects before generating the menu's HTML.
355 *
356 * @since 3.1.0
357 *
358 * @param array $sorted_menu_items The menu items, sorted by each menu item's menu order.
359 * @param object $args An object containing wp_nav_menu() arguments.
360 */
361 $sorted_menu_items = apply_filters( 'wp_nav_menu_objects', $sorted_menu_items, $args );
362
363 $items .= walk_nav_menu_tree( $sorted_menu_items, $args->depth, $args );
364 unset($sorted_menu_items);
365
366 // Attributes
367 if ( ! empty( $args->menu_id ) ) {
368 $wrap_id = $args->menu_id;
369 } else {
370 $wrap_id = 'menu-' . $menu->slug;
371 while ( in_array( $wrap_id, $menu_id_slugs ) ) {
372 if ( preg_match( '#-(\d+)$#', $wrap_id, $matches ) )
373 $wrap_id = preg_replace('#-(\d+)$#', '-' . ++$matches[1], $wrap_id );
374 else
375 $wrap_id = $wrap_id . '-1';
376 }
377 }
378 $menu_id_slugs[] = $wrap_id;
379
380 $wrap_class = $args->menu_class ? $args->menu_class : '';
381
382 /**
383 * Filter the HTML list content for navigation menus.
384 *
385 * @since 3.0.0
386 *
387 * @see wp_nav_menu()
388 *
389 * @param string $items The HTML list content for the menu items.
390 * @param object $args An object containing wp_nav_menu() arguments.
391 */
392 $items = apply_filters( 'wp_nav_menu_items', $items, $args );
393 /**
394 * Filter the HTML list content for a specific navigation menu.
395 *
396 * @since 3.0.0
397 *
398 * @see wp_nav_menu()
399 *
400 * @param string $items The HTML list content for the menu items.
401 * @param object $args An object containing wp_nav_menu() arguments.
402 */
403 $items = apply_filters( "wp_nav_menu_{$menu->slug}_items", $items, $args );
404
405 // Don't print any markup if there are no items at this point.
406 if ( empty( $items ) )
407 return false;
408
409 $nav_menu .= sprintf( $args->items_wrap, esc_attr( $wrap_id ), esc_attr( $wrap_class ), $items );
410 unset( $items );
411
412 if ( $show_container )
413 $nav_menu .= '</' . $args->container . '>';
414
415 /**
416 * Filter the HTML content for navigation menus.
417 *
418 * @since 3.0.0
419 *
420 * @see wp_nav_menu()
421 *
422 * @param string $nav_menu The HTML content for the navigation menu.
423 * @param object $args An object containing wp_nav_menu() arguments.
424 */
425 $nav_menu = apply_filters( 'wp_nav_menu', $nav_menu, $args );
426
427 if ( $args->echo )
428 echo $nav_menu;
429 else
430 return $nav_menu;
431}
432
433/**
434 * Add the class property classes for the current context, if applicable.
435 *
436 * @access private
437 * @since 3.0.0
438 *
439 * @global WP_Query $wp_query
440 * @global WP_Rewrite $wp_rewrite
441 *
442 * @param array $menu_items The current menu item objects to which to add the class property information.
443 */
444function _wp_menu_item_classes_by_context( &$menu_items ) {
445 global $wp_query, $wp_rewrite;
446
447 $queried_object = $wp_query->get_queried_object();
448 $queried_object_id = (int) $wp_query->queried_object_id;
449
450 $active_object = '';
451 $active_ancestor_item_ids = array();
452 $active_parent_item_ids = array();
453 $active_parent_object_ids = array();
454 $possible_taxonomy_ancestors = array();
455 $possible_object_parents = array();
456 $home_page_id = (int) get_option( 'page_for_posts' );
457
458 if ( $wp_query->is_singular && ! empty( $queried_object->post_type ) && ! is_post_type_hierarchical( $queried_object->post_type ) ) {
459 foreach ( (array) get_object_taxonomies( $queried_object->post_type ) as $taxonomy ) {
460 if ( is_taxonomy_hierarchical( $taxonomy ) ) {
461 $term_hierarchy = _get_term_hierarchy( $taxonomy );
462 $terms = wp_get_object_terms( $queried_object_id, $taxonomy, array( 'fields' => 'ids' ) );
463 if ( is_array( $terms ) ) {
464 $possible_object_parents = array_merge( $possible_object_parents, $terms );
465 $term_to_ancestor = array();
466 foreach ( (array) $term_hierarchy as $anc => $descs ) {
467 foreach ( (array) $descs as $desc )
468 $term_to_ancestor[ $desc ] = $anc;
469 }
470
471 foreach ( $terms as $desc ) {
472 do {
473 $possible_taxonomy_ancestors[ $taxonomy ][] = $desc;
474 if ( isset( $term_to_ancestor[ $desc ] ) ) {
475 $_desc = $term_to_ancestor[ $desc ];
476 unset( $term_to_ancestor[ $desc ] );
477 $desc = $_desc;
478 } else {
479 $desc = 0;
480 }
481 } while ( ! empty( $desc ) );
482 }
483 }
484 }
485 }
486 } elseif ( ! empty( $queried_object->taxonomy ) && is_taxonomy_hierarchical( $queried_object->taxonomy ) ) {
487 $term_hierarchy = _get_term_hierarchy( $queried_object->taxonomy );
488 $term_to_ancestor = array();
489 foreach ( (array) $term_hierarchy as $anc => $descs ) {
490 foreach ( (array) $descs as $desc )
491 $term_to_ancestor[ $desc ] = $anc;
492 }
493 $desc = $queried_object->term_id;
494 do {
495 $possible_taxonomy_ancestors[ $queried_object->taxonomy ][] = $desc;
496 if ( isset( $term_to_ancestor[ $desc ] ) ) {
497 $_desc = $term_to_ancestor[ $desc ];
498 unset( $term_to_ancestor[ $desc ] );
499 $desc = $_desc;
500 } else {
501 $desc = 0;
502 }
503 } while ( ! empty( $desc ) );
504 }
505
506 $possible_object_parents = array_filter( $possible_object_parents );
507
508 $front_page_url = home_url();
509
510 foreach ( (array) $menu_items as $key => $menu_item ) {
511
512 $menu_items[$key]->current = false;
513
514 $classes = (array) $menu_item->classes;
515 $classes[] = 'menu-item';
516 $classes[] = 'menu-item-type-' . $menu_item->type;
517 $classes[] = 'menu-item-object-' . $menu_item->object;
518
519 // if the menu item corresponds to a taxonomy term for the currently-queried non-hierarchical post object
520 if ( $wp_query->is_singular && 'taxonomy' == $menu_item->type && in_array( $menu_item->object_id, $possible_object_parents ) ) {
521 $active_parent_object_ids[] = (int) $menu_item->object_id;
522 $active_parent_item_ids[] = (int) $menu_item->db_id;
523 $active_object = $queried_object->post_type;
524
525 // if the menu item corresponds to the currently-queried post or taxonomy object
526 } elseif (
527 $menu_item->object_id == $queried_object_id &&
528 (
529 ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && $wp_query->is_home && $home_page_id == $menu_item->object_id ) ||
530 ( 'post_type' == $menu_item->type && $wp_query->is_singular ) ||
531 ( 'taxonomy' == $menu_item->type && ( $wp_query->is_category || $wp_query->is_tag || $wp_query->is_tax ) && $queried_object->taxonomy == $menu_item->object )
532 )
533 ) {
534 $classes[] = 'current-menu-item';
535 $menu_items[$key]->current = true;
536 $_anc_id = (int) $menu_item->db_id;
537
538 while(
539 ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&
540 ! in_array( $_anc_id, $active_ancestor_item_ids )
541 ) {
542 $active_ancestor_item_ids[] = $_anc_id;
543 }
544
545 if ( 'post_type' == $menu_item->type && 'page' == $menu_item->object ) {
546 // Back compat classes for pages to match wp_page_menu()
547 $classes[] = 'page_item';
548 $classes[] = 'page-item-' . $menu_item->object_id;
549 $classes[] = 'current_page_item';
550 }
551 $active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
552 $active_parent_object_ids[] = (int) $menu_item->post_parent;
553 $active_object = $menu_item->object;
554
555 // if the menu item corresponds to the currently-requested URL
556 } elseif ( 'custom' == $menu_item->object ) {
557 $_root_relative_current = untrailingslashit( $_SERVER['REQUEST_URI'] );
558 $current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_root_relative_current );
559 $raw_item_url = strpos( $menu_item->url, '#' ) ? substr( $menu_item->url, 0, strpos( $menu_item->url, '#' ) ) : $menu_item->url;
560 $item_url = set_url_scheme( untrailingslashit( $raw_item_url ) );
561 $_indexless_current = untrailingslashit( preg_replace( '/' . preg_quote( $wp_rewrite->index, '/' ) . '$/', '', $current_url ) );
562
563 if ( $raw_item_url && in_array( $item_url, array( $current_url, $_indexless_current, $_root_relative_current ) ) ) {
564 $classes[] = 'current-menu-item';
565 $menu_items[$key]->current = true;
566 $_anc_id = (int) $menu_item->db_id;
567
568 while(
569 ( $_anc_id = get_post_meta( $_anc_id, '_menu_item_menu_item_parent', true ) ) &&
570 ! in_array( $_anc_id, $active_ancestor_item_ids )
571 ) {
572 $active_ancestor_item_ids[] = $_anc_id;
573 }
574
575 if ( in_array( home_url(), array( untrailingslashit( $current_url ), untrailingslashit( $_indexless_current ) ) ) ) {
576 // Back compat for home link to match wp_page_menu()
577 $classes[] = 'current_page_item';
578 }
579 $active_parent_item_ids[] = (int) $menu_item->menu_item_parent;
580 $active_parent_object_ids[] = (int) $menu_item->post_parent;
581 $active_object = $menu_item->object;
582
583 // give front page item current-menu-item class when extra query arguments involved
584 } elseif ( $item_url == $front_page_url && is_front_page() ) {
585 $classes[] = 'current-menu-item';
586 }
587
588 if ( untrailingslashit($item_url) == home_url() )
589 $classes[] = 'menu-item-home';
590 }
591
592 // back-compat with wp_page_menu: add "current_page_parent" to static home page link for any non-page query
593 if ( ! empty( $home_page_id ) && 'post_type' == $menu_item->type && empty( $wp_query->is_page ) && $home_page_id == $menu_item->object_id )
594 $classes[] = 'current_page_parent';
595
596 $menu_items[$key]->classes = array_unique( $classes );
597 }
598 $active_ancestor_item_ids = array_filter( array_unique( $active_ancestor_item_ids ) );
599 $active_parent_item_ids = array_filter( array_unique( $active_parent_item_ids ) );
600 $active_parent_object_ids = array_filter( array_unique( $active_parent_object_ids ) );
601
602 // set parent's class
603 foreach ( (array) $menu_items as $key => $parent_item ) {
604 $classes = (array) $parent_item->classes;
605 $menu_items[$key]->current_item_ancestor = false;
606 $menu_items[$key]->current_item_parent = false;
607
608 if (
609 isset( $parent_item->type ) &&
610 (
611 // ancestral post object
612 (
613 'post_type' == $parent_item->type &&
614 ! empty( $queried_object->post_type ) &&
615 is_post_type_hierarchical( $queried_object->post_type ) &&
616 in_array( $parent_item->object_id, $queried_object->ancestors ) &&
617 $parent_item->object != $queried_object->ID
618 ) ||
619
620 // ancestral term
621 (
622 'taxonomy' == $parent_item->type &&
623 isset( $possible_taxonomy_ancestors[ $parent_item->object ] ) &&
624 in_array( $parent_item->object_id, $possible_taxonomy_ancestors[ $parent_item->object ] ) &&
625 (
626 ! isset( $queried_object->term_id ) ||
627 $parent_item->object_id != $queried_object->term_id
628 )
629 )
630 )
631 ) {
632 $classes[] = empty( $queried_object->taxonomy ) ? 'current-' . $queried_object->post_type . '-ancestor' : 'current-' . $queried_object->taxonomy . '-ancestor';
633 }
634
635 if ( in_array( intval( $parent_item->db_id ), $active_ancestor_item_ids ) ) {
636 $classes[] = 'current-menu-ancestor';
637 $menu_items[$key]->current_item_ancestor = true;
638 }
639 if ( in_array( $parent_item->db_id, $active_parent_item_ids ) ) {
640 $classes[] = 'current-menu-parent';
641 $menu_items[$key]->current_item_parent = true;
642 }
643 if ( in_array( $parent_item->object_id, $active_parent_object_ids ) )
644 $classes[] = 'current-' . $active_object . '-parent';
645
646 if ( 'post_type' == $parent_item->type && 'page' == $parent_item->object ) {
647 // Back compat classes for pages to match wp_page_menu()
648 if ( in_array('current-menu-parent', $classes) )
649 $classes[] = 'current_page_parent';
650 if ( in_array('current-menu-ancestor', $classes) )
651 $classes[] = 'current_page_ancestor';
652 }
653
654 $menu_items[$key]->classes = array_unique( $classes );
655 }
656}
657
658/**
659 * Retrieve the HTML list content for nav menu items.
660 *
661 * @uses Walker_Nav_Menu to create HTML list content.
662 * @since 3.0.0
663 *
664 * @param array $items
665 * @param int $depth
666 * @param object $r
667 * @return string
668 */
669function walk_nav_menu_tree( $items, $depth, $r ) {
670 $walker = ( empty($r->walker) ) ? new Walker_Nav_Menu : $r->walker;
671 $args = array( $items, $depth, $r );
672
673 return call_user_func_array( array( $walker, 'walk' ), $args );
674}
675
676/**
677 * Prevents a menu item ID from being used more than once.
678 *
679 * @since 3.0.1
680 * @access private
681 *
682 * @staticvar array $used_ids
683 * @param string $id
684 * @param object $item
685 * @return string
686 */
687function _nav_menu_item_id_use_once( $id, $item ) {
688 static $_used_ids = array();
689 if ( in_array( $item->ID, $_used_ids ) ) {
690 return '';
691 }
692 $_used_ids[] = $item->ID;
693 return $id;
694}