Feature request: Wayland support in mate-screenshot

[Sunderland93]

This can be done in two ways:

1. using xdg-desktop-portal's interface org.freedesktop.portal.Screenshot
2. using wlr-screencopy Wayland extension

The first way is universal, de-facto standard and makes mate-screenshot works on (probably) any Wayland desktop. However, there are two problems: 1) hard dependency on D-Bus, which is required for xdg-desktop-portal to work; 2) MATE desktop itself probably needs its own xdg-desktop-portal implementation (like xdg-desktop-portal-gnome, xdg-desktop-portal-kde, etc). There are xdg-desktop-portal-xapp developed by Linux Mint dev's, but I don't know if it's useful for such functionality.

Second way is much simpler, doesn't require D-Bus, but works only on wlroots-based compositors. grim is example.

[lukefromdc]

Wr already need a wlroots compatable compositor for wayland, as we use gtk-layer-shell to position panel menus and popups plus to keep the deaktop on thr bottom and anchor it to the screen dimensions

[Sunderland93]

Just to note: wlr-screencopy is proposed for wayland-protocols as ext-screencopy-v1 https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/124