fn get_frame_extents()

in src/platform_impl/linux/x11/util/geometry.rs [191:217]

• 21 lines of code
• 3 McCabe index (conditional complexity)

    fn get_frame_extents(&self, window: ffi::Window) -> Option<FrameExtents> {
        let extents_atom = unsafe { self.get_atom_unchecked(b"_NET_FRAME_EXTENTS\0") };

        if !hint_is_supported(extents_atom) {
            return None;
        }

        // Of the WMs tested, xmonad, i3, dwm, IceWM (1.3.x and earlier), and blackbox don't
        // support this. As this is part of EWMH (Extended Window Manager Hints), it's likely to
        // be unsupported by many smaller WMs.
        let extents: Option<Vec<c_ulong>> = self
            .get_property(window, extents_atom, ffi::XA_CARDINAL)
            .ok();

        extents.and_then(|extents| {
            if extents.len() >= 4 {
                Some(FrameExtents {
                    left: extents[0],
                    right: extents[1],
                    top: extents[2],
                    bottom: extents[3],
                })
            } else {
                None
            }
        })
    }