b925322e9e
As we want to eventually track two geometries, we need to rename our very plain "_x, _y, _width, _height". While we could just prefix them, I think that stuffing them in an object makes more sense. At the same time, make the variable and method name more descriptive by adding such a prefix, as well as a bit of documentation. https://bugzilla.gnome.org/show_bug.cgi?id=694469