How to make a second query offset -2 from current post

Question

I would like a second WP_Query on a custom post type's single page to return 5 posts, starting with two before the current post, so that I get this:

1. The-one-before-the-previous post
2. Previous post
3. Current post
4. Next post
5. The-one-after-the-next post

How can I do this? offset is only good if I know the number of the current post.

In pseudo-code it's easy:

$gallery = new WP_Query(array(
    'post_type' => 'artwork',
    'posts_per_page' => 5,
    'fake-offset' => $current->ID-2 //This is imaginary
));

Thanks in advance!

Answer 1

Instead of using the offset parameter, take a look at the post_where filter examples under the Time Parameters section of WP_Query codex page. You could just add a filter that returns posts that are less than the current post's date.