Smithay
Support for xdg shell version 4
Version 4 of xdg-shell has been released and adds xdg_toplevel::configure_bounds
Recommended window geometry bounds
The configure_bounds event may be sent prior to a xdg_toplevel.configure event to communicate the bounds a window geometry size is recommended to constrain to.
The passed width and height are in surface coordinate space. If width and height are 0, it means bounds is unknown and equivalent to as if no configure_bounds event was ever sent for this surface.
The bounds can for example correspond to the size of a monitor excluding any panels or other shell components, so that a surface isn't created in a way that it cannot fit.
The bounds may change at any point, and in such a case, a new xdg_toplevel.configure_bounds will be sent, followed by xdg_toplevel.configure and xdg_surface.configure.
