Adding in new functionality to open / open-with based off of MIME subclasses where needed

src/mime_icon.rs

@@ -73,3 +73,9 @@ pub fn mime_icon(mime: Mime, size: u16) -> icon::Handle {
         None => icon::from_name(FALLBACK_MIME_ICON).size(size).handle(),
     }
 }
+
+pub fn parent_mime_types(mime: &Mime) -> Option<Vec<Mime>> {
+    let mut mime_icon_cache = MIME_ICON_CACHE.lock().unwrap();
+
+    mime_icon_cache.shared_mime_info.get_parents_aliased(mime)
+}