<?php

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/**

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* Server-side rendering of the `core/navigation` block.

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*

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* @package WordPress

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*/

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/**

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* Helper functions used to render the navigation block.

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*

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* @since 6.5.0

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*/

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class WP_Navigation_Block_Renderer {

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/**

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* Used to determine whether or not a navigation has submenus.

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*

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* @since 6.5.0

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*/

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private static $has_submenus = false;

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/**

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* Used to determine which blocks need an <li> wrapper.

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*

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* @since 6.5.0

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*

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* @var array

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*/

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private static $needs_list_item_wrapper = array(

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'core/site-title',

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'core/site-logo',

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'core/social-links',

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);

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/**

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* Keeps track of all the navigation names that have been seen.

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*

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* @since 6.5.0

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*

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* @var array

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*/

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private static $seen_menu_names = array();

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/**

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* Returns whether or not this is responsive navigation.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @return bool Returns whether or not this is responsive navigation.

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*/

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private static function is_responsive( $attributes ) {

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/**

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* This is for backwards compatibility after the `isResponsive` attribute was been removed.

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*/

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$has_old_responsive_attribute = ! empty( $attributes['isResponsive'] ) && $attributes['isResponsive'];

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return isset( $attributes['overlayMenu'] ) && 'never' !== $attributes['overlayMenu'] || $has_old_responsive_attribute;

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}

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/**

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* Returns whether or not a navigation has a submenu.

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*

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* @since 6.5.0

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*

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* @param WP_Block_List $inner_blocks The list of inner blocks.

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* @return bool Returns whether or not a navigation has a submenu and also sets the member variable.

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*/

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private static function has_submenus( $inner_blocks ) {

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if ( true === static::$has_submenus ) {

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return static::$has_submenus;

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}

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foreach ( $inner_blocks as $inner_block ) {

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// If this is a page list then work out if any of the pages have children.

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if ( 'core/page-list' === $inner_block->name ) {

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$all_pages = get_pages(

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array(

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'sort_column' => 'menu_order,post_title',

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'order' => 'asc',

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)

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);

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foreach ( (array) $all_pages as $page ) {

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if ( $page->post_parent ) {

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static::$has_submenus = true;

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break;

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}

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}

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}

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// If this is a navigation submenu then we know we have submenus.

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if ( 'core/navigation-submenu' === $inner_block->name ) {

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static::$has_submenus = true;

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break;

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}

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}

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return static::$has_submenus;

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}

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/**

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* Determine whether the navigation blocks is interactive.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @param WP_Block_List $inner_blocks The list of inner blocks.

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* @return bool Returns whether or not to load the view script.

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*/

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private static function is_interactive( $attributes, $inner_blocks ) {

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$has_submenus = static::has_submenus( $inner_blocks );

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$is_responsive_menu = static::is_responsive( $attributes );

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return ( $has_submenus && ( $attributes['openSubmenusOnClick'] || $attributes['showSubmenuIcon'] ) ) || $is_responsive_menu;

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}

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/**

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* Returns whether or not a block needs a list item wrapper.

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*

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* @since 6.5.0

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*

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* @param WP_Block $block The block.

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* @return bool Returns whether or not a block needs a list item wrapper.

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*/

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private static function does_block_need_a_list_item_wrapper( $block ) {

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/**

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* Filter the list of blocks that need a list item wrapper.

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*

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* Affords the ability to customize which blocks need a list item wrapper when rendered

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* within a core/navigation block.

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* This is useful for blocks that are not list items but should be wrapped in a list

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* item when used as a child of a navigation block.

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*

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* @since 6.5.0

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*

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* @param array $needs_list_item_wrapper The list of blocks that need a list item wrapper.

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*/

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$needs_list_item_wrapper = apply_filters( 'block_core_navigation_listable_blocks', static::$needs_list_item_wrapper );

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return in_array( $block->name, $needs_list_item_wrapper, true );

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}

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/**

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* Returns the markup for a single inner block.

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*

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* @since 6.5.0

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*

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* @param WP_Block $inner_block The inner block.

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* @return string Returns the markup for a single inner block.

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*/

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private static function get_markup_for_inner_block( $inner_block ) {

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$inner_block_content = $inner_block->render();

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if ( ! empty( $inner_block_content ) ) {

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if ( static::does_block_need_a_list_item_wrapper( $inner_block ) ) {

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return '<li class="wp-block-navigation-item">' . $inner_block_content . '</li>';

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}

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}

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return $inner_block_content;

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}

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/**

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* Returns the html for the inner blocks of the navigation block.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @param WP_Block_List $inner_blocks The list of inner blocks.

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* @return string Returns the html for the inner blocks of the navigation block.

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*/

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private static function get_inner_blocks_html( $attributes, $inner_blocks ) {

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$has_submenus = static::has_submenus( $inner_blocks );

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$is_interactive = static::is_interactive( $attributes, $inner_blocks );

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$style = static::get_styles( $attributes );

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$class = static::get_classes( $attributes );

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$container_attributes = get_block_wrapper_attributes(

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array(

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'class' => 'wp-block-navigation__container ' . $class,

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'style' => $style,

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)

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);

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$inner_blocks_html = '';

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$is_list_open = false;

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foreach ( $inner_blocks as $inner_block ) {

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$inner_block_markup = static::get_markup_for_inner_block( $inner_block );

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$p = new WP_HTML_Tag_Processor( $inner_block_markup );

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$is_list_item = $p->next_tag( 'LI' );

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if ( $is_list_item && ! $is_list_open ) {

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$is_list_open = true;

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$inner_blocks_html .= sprintf(

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'<ul %1$s>',

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$container_attributes

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);

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}

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if ( ! $is_list_item && $is_list_open ) {

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$is_list_open = false;

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$inner_blocks_html .= '</ul>';

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}

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$inner_blocks_html .= $inner_block_markup;

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}

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if ( $is_list_open ) {

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$inner_blocks_html .= '</ul>';

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}

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// Add directives to the submenu if needed.

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if ( $has_submenus && $is_interactive ) {

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$tags = new WP_HTML_Tag_Processor( $inner_blocks_html );

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$inner_blocks_html = block_core_navigation_add_directives_to_submenu( $tags, $attributes );

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}

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return $inner_blocks_html;

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}

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/**

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* Gets the inner blocks for the navigation block from the navigation post.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @return WP_Block_List Returns the inner blocks for the navigation block.

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*/

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private static function get_inner_blocks_from_navigation_post( $attributes ) {

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$navigation_post = get_post( $attributes['ref'] );

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if ( ! isset( $navigation_post ) ) {

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return new WP_Block_List( array(), $attributes );

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}

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// Only published posts are valid. If this is changed then a corresponding change

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// must also be implemented in `use-navigation-menu.js`.

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if ( 'publish' === $navigation_post->post_status ) {

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$parsed_blocks = parse_blocks( $navigation_post->post_content );

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// 'parse_blocks' includes a null block with '\n\n' as the content when

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// it encounters whitespace. This code strips it.

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$blocks = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );

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// Re-serialize, and run Block Hooks algorithm to inject hooked blocks.

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// TODO: See if we can move the apply_block_hooks_to_content_from_post_object() call

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// before the parse_blocks() call further above, to avoid the extra serialization/parsing.

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$markup = serialize_blocks( $blocks );

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$markup = apply_block_hooks_to_content_from_post_object( $markup, $navigation_post );

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$blocks = parse_blocks( $markup );

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// TODO - this uses the full navigation block attributes for the

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// context which could be refined.

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return new WP_Block_List( $blocks, $attributes );

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}

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}

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/**

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* Gets the inner blocks for the navigation block from the fallback.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @return WP_Block_List Returns the inner blocks for the navigation block.

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*/

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private static function get_inner_blocks_from_fallback( $attributes ) {

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$fallback_blocks = block_core_navigation_get_fallback_blocks();

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// Fallback my have been filtered so do basic test for validity.

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if ( empty( $fallback_blocks ) || ! is_array( $fallback_blocks ) ) {

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return new WP_Block_List( array(), $attributes );

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}

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return new WP_Block_List( $fallback_blocks, $attributes );

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}

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/**

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* Gets the inner blocks for the navigation block.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @param WP_Block $block The parsed block.

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* @return WP_Block_List Returns the inner blocks for the navigation block.

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*/

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private static function get_inner_blocks( $attributes, $block ) {

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$inner_blocks = $block->inner_blocks;

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// Ensure that blocks saved with the legacy ref attribute name (navigationMenuId) continue to render.

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if ( array_key_exists( 'navigationMenuId', $attributes ) ) {

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$attributes['ref'] = $attributes['navigationMenuId'];

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}

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// If:

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// - the gutenberg plugin is active

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// - `__unstableLocation` is defined

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// - we have menu items at the defined location

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// - we don't have a relationship to a `wp_navigation` Post (via `ref`).

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// ...then create inner blocks from the classic menu assigned to that location.

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if (

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defined( 'IS_GUTENBERG_PLUGIN' ) && IS_GUTENBERG_PLUGIN &&

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array_key_exists( '__unstableLocation', $attributes ) &&

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! array_key_exists( 'ref', $attributes ) &&

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! empty( block_core_navigation_get_menu_items_at_location( $attributes['__unstableLocation'] ) )

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) {

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$inner_blocks = block_core_navigation_get_inner_blocks_from_unstable_location( $attributes );

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}

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// Load inner blocks from the navigation post.

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if ( array_key_exists( 'ref', $attributes ) ) {

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$inner_blocks = static::get_inner_blocks_from_navigation_post( $attributes );

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}

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// If there are no inner blocks then fallback to rendering an appropriate fallback.

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if ( empty( $inner_blocks ) ) {

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$inner_blocks = static::get_inner_blocks_from_fallback( $attributes );

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}

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/**

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* Filter navigation block $inner_blocks.

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* Allows modification of a navigation block menu items.

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*

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* @since 6.1.0

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*

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* @param \WP_Block_List $inner_blocks

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*/

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$inner_blocks = apply_filters( 'block_core_navigation_render_inner_blocks', $inner_blocks );

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$post_ids = block_core_navigation_get_post_ids( $inner_blocks );

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if ( $post_ids ) {

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_prime_post_caches( $post_ids, false, false );

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}

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return $inner_blocks;

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}

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/**

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* Gets the name of the current navigation, if it has one.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @return string Returns the name of the navigation.

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*/

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private static function get_navigation_name( $attributes ) {

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$navigation_name = $attributes['ariaLabel'] ?? '';

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if ( ! empty( $navigation_name ) ) {

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return $navigation_name;

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}

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// Load the navigation post.

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if ( array_key_exists( 'ref', $attributes ) ) {

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$navigation_post = get_post( $attributes['ref'] );

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if ( ! isset( $navigation_post ) ) {

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return $navigation_name;

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}

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// Only published posts are valid. If this is changed then a corresponding change

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// must also be implemented in `use-navigation-menu.js`.

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if ( 'publish' === $navigation_post->post_status ) {

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$navigation_name = $navigation_post->post_title;

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// This is used to count the number of times a navigation name has been seen,

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// so that we can ensure every navigation has a unique id.

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if ( isset( static::$seen_menu_names[ $navigation_name ] ) ) {

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++static::$seen_menu_names[ $navigation_name ];

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} else {

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static::$seen_menu_names[ $navigation_name ] = 1;

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}

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}

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}

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return $navigation_name;

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}

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/**

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* Returns the layout class for the navigation block.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @return string Returns the layout class for the navigation block.

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*/

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private static function get_layout_class( $attributes ) {

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$layout_justification = array(

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'left' => 'items-justified-left',

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'right' => 'items-justified-right',

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'center' => 'items-justified-center',

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'space-between' => 'items-justified-space-between',

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);

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$layout_class = '';

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if (

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isset( $attributes['layout']['justifyContent'] ) &&

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isset( $layout_justification[ $attributes['layout']['justifyContent'] ] )

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) {

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$layout_class .= $layout_justification[ $attributes['layout']['justifyContent'] ];

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}

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if ( isset( $attributes['layout']['orientation'] ) && 'vertical' === $attributes['layout']['orientation'] ) {

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$layout_class .= ' is-vertical';

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}

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if ( isset( $attributes['layout']['flexWrap'] ) && 'nowrap' === $attributes['layout']['flexWrap'] ) {

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$layout_class .= ' no-wrap';

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}

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return $layout_class;

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}

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/**

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* Return classes for the navigation block.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @return string Returns the classes for the navigation block.

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*/

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private static function get_classes( $attributes ) {

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// Restore legacy classnames for submenu positioning.

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$layout_class = static::get_layout_class( $attributes );

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$colors = block_core_navigation_build_css_colors( $attributes );

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$font_sizes = block_core_navigation_build_css_font_sizes( $attributes );

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$is_responsive_menu = static::is_responsive( $attributes );

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// Manually add block support text decoration as CSS class.

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$text_decoration = $attributes['style']['typography']['textDecoration'] ?? null;

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$text_decoration_class = sprintf( 'has-text-decoration-%s', $text_decoration );

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$classes = array_merge(

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$colors['css_classes'],

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$font_sizes['css_classes'],

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$is_responsive_menu ? array( 'is-responsive' ) : array(),

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$layout_class ? array( $layout_class ) : array(),

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$text_decoration ? array( $text_decoration_class ) : array()

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);

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return implode( ' ', $classes );

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}

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/**

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* Get styles for the navigation block.

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @return string Returns the styles for the navigation block.

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*/

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private static function get_styles( $attributes ) {

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$colors = block_core_navigation_build_css_colors( $attributes );

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$font_sizes = block_core_navigation_build_css_font_sizes( $attributes );

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$block_styles = isset( $attributes['styles'] ) ? $attributes['styles'] : '';

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return $block_styles . $colors['inline_styles'] . $font_sizes['inline_styles'];

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}

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/**

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* Get the responsive container markup

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*

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* @since 6.5.0

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*

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* @param array $attributes The block attributes.

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* @param WP_Block_List $inner_blocks The list of inner blocks.

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* @param string $inner_blocks_html The markup for the inner blocks.

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* @return string Returns the container markup.

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*/

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private static function get_responsive_container_markup( $attributes, $inner_blocks, $inner_blocks_html ) {

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$is_interactive = static::is_interactive( $attributes, $inner_blocks );

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$colors = block_core_navigation_build_css_colors( $attributes );

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$modal_unique_id = wp_unique_id( 'modal-' );

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$is_hidden_by_default = isset( $attributes['overlayMenu'] ) && 'always' === $attributes['overlayMenu'];

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$responsive_container_classes = array(

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'wp-block-navigation__responsive-container',

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$is_hidden_by_default ? 'hidden-by-default' : '',

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implode( ' ', $colors['overlay_css_classes'] ),

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);

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$open_button_classes = array(

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'wp-block-navigation__responsive-container-open',

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$is_hidden_by_default ? 'always-shown' : '',

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);

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$should_display_icon_label = isset( $attributes['hasIcon'] ) && true === $attributes['hasIcon'];

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$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" aria-hidden="true" focusable="false"><path d="M4 7.5h16v1.5H4z"></path><path d="M4 15h16v1.5H4z"></path></svg>';

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if ( isset( $attributes['icon'] ) ) {

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if ( 'menu' === $attributes['icon'] ) {

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$toggle_button_icon = '<svg width="24" height="24" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M5 5v1.5h14V5H5z"></path><path d="M5 12.8h14v-1.5H5v1.5z"></path><path d="M5 19h14v-1.5H5V19z"></path></svg>';

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}

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}

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$toggle_button_content = $should_display_icon_label ? $toggle_button_icon : __( 'Menu' );

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$toggle_close_button_icon = '<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" focusable="false"><path d="m13.06 12 6.47-6.47-1.06-1.06L12 10.94 5.53 4.47 4.47 5.53 10.94 12l-6.47 6.47 1.06 1.06L12 13.06l6.47 6.47 1.06-1.06L13.06 12Z"></path></svg>';

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$toggle_close_button_content = $should_display_icon_label ? $toggle_close_button_icon : __( 'Close' );

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$toggle_aria_label_open = $should_display_icon_label ? 'aria-label="' . __( 'Open menu' ) . '"' : ''; // Open button label.

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$toggle_aria_label_close = $should_display_icon_label ? 'aria-label="' . __( 'Close menu' ) . '"' : ''; // Close button label.

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// Add Interactivity API directives to the markup if needed.

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$open_button_directives = '';

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$responsive_container_directives = '';

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$responsive_dialog_directives = '';

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$close_button_directives = '';

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if ( $is_interactive ) {

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$open_button_directives = '

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data-wp-on--click="actions.openMenuOnClick"

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