twentyfourteen_post_nav()

81	function twentyfourteen_post_nav() {82		// Don't print empty markup if there's nowhere to navigate.83		$previous = ( is_attachment() ) ? get_post( get_post()->post_parent ) : get_adjacent_post( false, '', true );84		$next     = get_adjacent_post( false, '', false );85 86		if ( ! $next && ! $previous ) {87			return;88		}89 90		?>91		<nav class="navigation post-navigation">92		<h1 class="screen-reader-text">93			<?php94			/* translators: Hidden accessibility text. */95			_e( 'Post navigation', 'twentyfourteen' );96			?>97		</h1>98		<div class="nav-links">99			<?php100			if ( is_attachment() ) :101				previous_post_link( '%link', __( '<span class="meta-nav">Published In</span>%title', 'twentyfourteen' ) );102				else :103					previous_post_link( '%link', __( '<span class="meta-nav">Previous Post</span>%title', 'twentyfourteen' ) );104					next_post_link( '%link', __( '<span class="meta-nav">Next Post</span>%title', 'twentyfourteen' ) );105				endif;106				?>107			</div><!-- .nav-links -->108		</nav><!-- .navigation -->109		<?php110	}