MIME type globs in FileChooser portals?

[nicolasfella]

Some applications use wildcard patterns like video/* in the MIME type filters for the FileChooser portal.

For example Footage sends

dict entry(
    string "filters"
    variant             array [
        struct {
            string "Videodateien"
            array [
                struct {
                uint32 1
                string "video/*"
                }
            ]
        }
    ]
)

xdg-desktop-portal-kde doesn't handle those (https://bugs.kde.org/show_bug.cgi?id=450612). Before I go and fix this I wanted to ask whether portal implementations are actually expected to handle those. The interface description doesn't mention this, so it would be good to have this clarified one way or the other

[Mikenux]

It seems it isn't expected.

According to https://github.com/flatpak/xdg-desktop-portal/blob/main/data/org.freedesktop.impl.portal.FileChooser.xml, you need to look at https://github.com/flatpak/xdg-desktop-portal/blob/main/data/org.freedesktop.portal.FileChooser.xml, which says:

List of serialized file filters.

    Each item in the array specifies a single filter to offer to the user.

    The first string is a user-visible name for the filter. The ``a(us)``
    specifies a list of filter strings, which can be either a glob-style
    pattern (indicated by 0) or a MIME type (indicated by 1). Patterns are
    case-sensitive.

    To match different capitalizations of, e.g. ``'*.ico'``, use a pattern
    like: ``'*.[iI][cC][oO]'``.

    Example: ``[('Images', [(0, '*.ico'), (1, 'image/png')]), ('Text', [(0, '*.txt')])]``