Vantage Content Nav

if ( ! function_exists( 'vantage_content_nav' ) ) :
/**
 * Display navigation to next/previous pages when applicable
 *
 * @since vantage 1.0
 */
function vantage_content_nav( $nav_id ) {
	$jetpack_infinite_scroll_active = class_exists( 'Jetpack' ) && Jetpack::is_module_active( 'infinite-scroll' );
	//Check if we're in the Page Builder Post Loop widget.
	$is_page_builder_post_loop_widget = class_exists( 'SiteOrigin_Panels_Widgets_PostLoop' ) &&
	                                    method_exists( 'SiteOrigin_Panels_Widgets_PostLoop', 'is_rendering_loop' ) &&
	                                    SiteOrigin_Panels_Widgets_PostLoop::is_rendering_loop();

	if( $jetpack_infinite_scroll_active && ! $is_page_builder_post_loop_widget ) {
		return;
	}
	global $wp_query, $post;

	// Don't print empty markup on single pages if there's nowhere to navigate.
	if ( is_single() ) {
		$previous = ( is_attachment() ) ? get_post( $post->post_parent ) : get_adjacent_post( false, '', true );
		$next = get_adjacent_post( false, '', false );

		if ( ! $next && ! $previous )
			return;
	}

	// Don't print empty markup in archives if there's only one page.
	if ( $wp_query->max_num_pages < 2 && ( is_home() || is_archive() || is_search() ) )
		return;

	// Add the shorten title filter
	add_filter('the_title', 'vantage_content_nav_shorten_title');

	$nav_class = 'site-navigation paging-navigation';
	if ( is_single() )
		$nav_class = 'site-navigation post-navigation';

	?>
	<nav role="navigation" id="<?php echo esc_attr( $nav_id ); ?>" class="<?php echo $nav_class; ?>">
		<h1 class="assistive-text"><?php _e( 'Post navigation', 'vantage' ); ?></h1>

	<?php if ( is_single() ) : // navigation links for single posts ?>

		<div class="single-nav-wrapper">
			<?php previous_post_link( '<div class="nav-previous">%link</div>', '<span class="meta-nav">' . _x( '&larr;', 'Previous post link', 'vantage' ) . '</span> %title' ); ?>
			<?php next_post_link( '<div class="nav-next">%link</div>', '%title <span class="meta-nav">' . _x( '&rarr;', 'Next post link', 'vantage' ) . '</span>' ); ?>
		</div>

	<?php elseif ( $wp_query->max_num_pages > 1 && ( is_home() || is_archive() || is_search() ) ) : // navigation links for home, archive, and search pages ?>

		<?php vantage_pagination() ?>

	<?php endif; ?>

	</nav><!-- #<?php echo esc_html( $nav_id ); ?> -->
	<?php

	// Remove the shorten title filter
	remove_filter('the_title', 'vantage_content_nav_shorten_title');
}
endif; // vantage_content_nav