WP_Widget_Media_Image::render_media() WordPress Method

	public function render_media( $instance ) {
		$instance = array_merge( wp_list_pluck( $this->get_instance_schema(), 'default' ), $instance );
		$instance = wp_parse_args(
			$instance,
			array(
				'size' => 'thumbnail',
			)
		);

		$attachment = null;

		if ( $this->is_attachment_with_mime_type( $instance['attachment_id'], $this->widget_options['mime_type'] ) ) {
			$attachment = get_post( $instance['attachment_id'] );
		}

		if ( $attachment ) {
			$caption = '';
			if ( ! isset( $instance['caption'] ) ) {
				$caption = $attachment->post_excerpt;
			} elseif ( trim( $instance['caption'] ) ) {
				$caption = $instance['caption'];
			}

			$image_attributes = array(
				'class' => sprintf( 'image wp-image-%d %s', $attachment->ID, $instance['image_classes'] ),
				'style' => 'max-width: 100%; height: auto;',
			);
			if ( ! empty( $instance['image_title'] ) ) {
				$image_attributes['title'] = $instance['image_title'];
			}

			if ( $instance['alt'] ) {
				$image_attributes['alt'] = $instance['alt'];
			}

			$size = $instance['size'];

			if ( 'custom' === $size || ! in_array( $size, array_merge( get_intermediate_image_sizes(), array( 'full' ) ), true ) ) {
				$size  = array( $instance['width'], $instance['height'] );
				$width = $instance['width'];
			} else {
				$caption_size = _wp_get_image_size_from_meta( $instance['size'], wp_get_attachment_metadata( $attachment->ID ) );
				$width        = empty( $caption_size[0] ) ? 0 : $caption_size[0];
			}

			$image_attributes['class'] .= sprintf( ' attachment-%1$s size-%1$s', is_array( $size ) ? implode( 'x', $size ) : $size );

			$image = wp_get_attachment_image( $attachment->ID, $size, false, $image_attributes );

		} else {
			if ( empty( $instance['url'] ) ) {
				return;
			}

			$instance['size'] = 'custom';
			$caption          = $instance['caption'];
			$width            = $instance['width'];
			$classes          = 'image ' . $instance['image_classes'];
			if ( 0 === $instance['width'] ) {
				$instance['width'] = '';
			}
			if ( 0 === $instance['height'] ) {
				$instance['height'] = '';
			}

			$image = sprintf(
				'<img class="%1$s" src="%2$s" alt="%3$s" width="%4$s" height="%5$s" />',
				esc_attr( $classes ),
				esc_url( $instance['url'] ),
				esc_attr( $instance['alt'] ),
				esc_attr( $instance['width'] ),
				esc_attr( $instance['height'] )
			);
		} // End if().

		$url = '';
		if ( 'file' === $instance['link_type'] ) {
			$url = $attachment ? wp_get_attachment_url( $attachment->ID ) : $instance['url'];
		} elseif ( $attachment && 'post' === $instance['link_type'] ) {
			$url = get_attachment_link( $attachment->ID );
		} elseif ( 'custom' === $instance['link_type'] && ! empty( $instance['link_url'] ) ) {
			$url = $instance['link_url'];
		}

		if ( $url ) {
			$link = sprintf( '<a href="%s"', esc_url( $url ) );
			if ( ! empty( $instance['link_classes'] ) ) {
				$link .= sprintf( ' class="%s"', esc_attr( $instance['link_classes'] ) );
			}
			if ( ! empty( $instance['link_rel'] ) ) {
				$link .= sprintf( ' rel="%s"', esc_attr( $instance['link_rel'] ) );
			}
			if ( ! empty( $instance['link_target_blank'] ) ) {
				$link .= ' target="_blank"';
			}
			$link .= '>';
			$link .= $image;
			$link .= '</a>';
			$image = wp_targeted_link_rel( $link );
		}

		if ( $caption ) {
			$image = img_caption_shortcode(
				array(
					'width'   => $width,
					'caption' => $caption,
				),
				$image
			);
		}

		echo $image;
	}