register as viewer/editor/handler for .xdc file extension

[Simon-Laux]

ask for chat to send it in, maybe it's possible to reuse the share or forward dialog?

I think we can offer previews for the files, so I would say we should show the webxdc's icon there if it's not too complicated, or just show the default webxdc icon for now, so they at least look a bit distinct from the blank default file icon.

[Simon-Laux]

I could not find any information on providing a custom thumbnail for the file, so I'll assume that it's not possible. so the default webxdc icon it is, it looks similar enough to the delta chat logo.

Here are some links that could help:

• https://developer.apple.com/documentation/bundleresources/information_property_list/cfbundledocumenttypes
• https://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application/2781290#2781290
• https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/understanding_utis/understand_utis_declare/understand_utis_declare.html#//apple_ref/doc/uid/TP40001319-CH204-SW1

[Simon-Laux]

I could not find any information on providing a custom thumbnail for the file, so I'll assume that it's not possible

It actually is possible, see https://github.com/deltachat/apple_webxdc_quick_look_thumbnail_provider