pen/partials/content-thumbnail.php

<?php
/**
 * Template part for displaying the content featured image.
 *
 * @link https://developer.wordpress.org/themes/basics/template-hierarchy/
 *
 * @package Pen
 */

if ( ! post_password_required() && ! is_attachment() && has_post_thumbnail() ) {

	$pen_post_id = get_the_ID();

	if ( is_singular() ) {
		$thumbnail_display = get_post_meta( $pen_post_id, 'pen_content_thumbnail_display_override', true );
		if ( ! $thumbnail_display || 'default' === $thumbnail_display ) {
			$thumbnail_display = pen_option_get( 'content_thumbnail_display' );
		}
		if ( $thumbnail_display && 'no' !== $thumbnail_display ) {

			$thumbnail_size = get_post_meta( $pen_post_id, 'pen_content_thumbnail_resize_override', true );
			if ( ! $thumbnail_size || 'default' === $thumbnail_size ) {
				$thumbnail_size = pen_option_get( 'content_thumbnail_resize' );
			}
			if ( 'none' === $thumbnail_size ) {
				if ( 'image' === get_post_type() ) {
					$thumbnail_size = 'large';
				} else {
					$thumbnail_size = 'medium';
				}
			}

			$animation_reveal = get_post_meta( $pen_post_id, 'pen_content_thumbnail_animation_reveal_override', true );
			if ( ! $animation_reveal || 'default' === $animation_reveal ) {
				$animation_reveal = pen_option_get( 'content_thumbnail_animation_reveal' );
			}

			$classes = trim(
				implode(
					' ',
					array_filter(
						array(
							'post-thumbnail',
							'pen_thumbnail_size_' . $thumbnail_size,
							$animation_reveal ? 'pen_custom_animation_' . $animation_reveal : '',
						)
					)
				)
			);
			?>
		<div class="<?php echo esc_attr( $classes ); ?>">
			<?php
			the_post_thumbnail( $thumbnail_size );
			?>
		</div><!-- .post-thumbnail -->

			<?php
		}
	} else {

		$thumbnail_display = get_post_meta( $pen_post_id, 'pen_list_thumbnail_display_override', true );
		if ( ! $thumbnail_display || 'default' === $thumbnail_display ) {
			$thumbnail_display = pen_option_get( 'list_thumbnail_display' );
		}
		if ( $thumbnail_display && 'no' !== $thumbnail_display ) {

			$thumbnail_size = get_post_meta( $pen_post_id, 'pen_list_thumbnail_resize_override', true );
			if ( ! $thumbnail_size || 'default' === $thumbnail_size ) {
				$thumbnail_size = pen_option_get( 'list_thumbnail_resize' );
			}
			if ( 'none' === $thumbnail_size || 'masonry' === pen_option_get( 'list_type' ) ) {
				$thumbnail_size = 'large';
			}

			$animation_reveal = get_post_meta( $pen_post_id, 'pen_list_thumbnail_animation_reveal_override', true );
			if ( ! $animation_reveal || 'default' === $animation_reveal ) {
				$animation_reveal = pen_option_get( 'list_thumbnail_animation_reveal' );
			}

			$classes = trim(
				implode(
					' ',
					array_filter(
						array(
							'post-thumbnail',
							'pen_thumbnail_size_' . $thumbnail_size,
							$animation_reveal ? 'pen_custom_animation_' . $animation_reveal : '',
						)
					)
				)
			);
			?>
		<a class="<?php echo esc_attr( $classes ); ?>" href="<?php the_permalink(); ?>" aria-hidden="true" tabindex="-1">
			<?php
			the_post_thumbnail( $thumbnail_size );
			?>
		</a>
			<?php
		}
	}
}