Source

File: wp-admin/includes/class-wp-themes-list-table.php

public function display_rows() {
		$themes = $this->items;

		foreach ( $themes as $theme ) :
			?>
			<div class="available-theme">
			<?php

			$template   = $theme->get_template();
			$stylesheet = $theme->get_stylesheet();
			$title      = $theme->display( 'Name' );
			$version    = $theme->display( 'Version' );
			$author     = $theme->display( 'Author' );

			$activate_link = wp_nonce_url( 'themes.php?action=activate&amp;template=' . urlencode( $template ) . '&amp;stylesheet=' . urlencode( $stylesheet ), 'switch-theme_' . $stylesheet );

			$actions             = array();
			$actions['activate'] = sprintf(
				'<a href="%s" class="activatelink" title="%s">%s</a>',
				$activate_link,
				/* translators: %s: Theme name. */
				esc_attr( sprintf( _x( 'Activate &#8220;%s&#8221;', 'theme' ), $title ) ),
				__( 'Activate' )
			);

			if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
				$actions['preview'] .= sprintf(
					'<a href="%s" class="load-customize hide-if-no-customize">%s</a>',
					wp_customize_url( $stylesheet ),
					__( 'Live Preview' )
				);
			}

			if ( ! is_multisite() && current_user_can( 'delete_themes' ) ) {
				$actions['delete'] = sprintf(
					'<a class="submitdelete deletion" href="%s" onclick="return confirm( \'%s\' );">%s</a>',
					wp_nonce_url( 'themes.php?action=delete&amp;stylesheet=' . urlencode( $stylesheet ), 'delete-theme_' . $stylesheet ),
					/* translators: %s: Theme name. */
					esc_js( sprintf( __( "You are about to delete this theme '%s'\n  'Cancel' to stop, 'OK' to delete." ), $title ) ),
					__( 'Delete' )
				);
			}

			/** This filter is documented in wp-admin/includes/class-wp-ms-themes-list-table.php */
			$actions = apply_filters( 'theme_action_links', $actions, $theme, 'all' );

			/** This filter is documented in wp-admin/includes/class-wp-ms-themes-list-table.php */
			$actions       = apply_filters( "theme_action_links_{$stylesheet}", $actions, $theme, 'all' );
			$delete_action = isset( $actions['delete'] ) ? '<div class="delete-theme">' . $actions['delete'] . '</div>' : '';
			unset( $actions['delete'] );

			$screenshot = $theme->get_screenshot();
			?>

			<span class="screenshot hide-if-customize">
				<?php if ( $screenshot ) : ?>
					<img src="<?php echo esc_url( $screenshot ); ?>" alt="" />
				<?php endif; ?>
			</span>
			<a href="<?php echo wp_customize_url( $stylesheet ); ?>" class="screenshot load-customize hide-if-no-customize">
				<?php if ( $screenshot ) : ?>
					<img src="<?php echo esc_url( $screenshot ); ?>" alt="" />
				<?php endif; ?>
			</a>

			<h3><?php echo $title; ?></h3>
			<div class="theme-author">
				<?php
					/* translators: %s: Theme author. */
					printf( __( 'By %s' ), $author );
				?>
			</div>
			<div class="action-links">
				<ul>
					<?php foreach ( $actions as $action ) : ?>
						<li><?php echo $action; ?></li>
					<?php endforeach; ?>
					<li class="hide-if-no-js"><a href="#" class="theme-detail"><?php _e( 'Details' ); ?></a></li>
				</ul>
				<?php echo $delete_action; ?>

				<?php theme_update_available( $theme ); ?>
			</div>

			<div class="themedetaildiv hide-if-js">
				<p><strong><?php _e( 'Version:' ); ?></strong> <?php echo $version; ?></p>
				<p><?php echo $theme->display( 'Description' ); ?></p>
				<?php
				if ( $theme->parent() ) {
					printf(
						/* translators: 1: Link to documentation on child themes, 2: Name of parent theme. */
						' <p class="howto">' . __( 'This <a href="%1$s">child theme</a> requires its parent theme, %2$s.' ) . '</p>',
						__( 'https://developer.wordpress.org/themes/advanced-topics/child-themes/' ),
						$theme->parent()->display( 'Name' )
					);
				}
				?>
			</div>

			</div>
			<?php
		endforeach;
	}