8833991201
Add support for assigning a window a custom window placement rule used for calculating the initial window position as well as defining how a window is constrained. The custom rule is a declarative rule which defines a set of parameters which the placing algorithm and constrain algorithm uses for calculating the position of a window. It is meant to be used to implement positioning of menus and other popup windows created via Wayland. A custom placement rule replaces any other placement or constraint rule. https://bugzilla.gnome.org/show_bug.cgi?id=769936