get-filename

Returns the name of the currently loaded file, or null if a file is not loaded (or if a file was loaded with inlining).

• (send a-wx:image-snip get-filename relative-path) -> string or null
      relative-path = null : boxed boolean or null

  The relative-path box is filled with #t if the loaded file's path is relative to the owning buffer's path, unless relative-path is null.