This is a convenience module in order to have less import noise. It
re-exports the following:
a) Commonly used modules in full (Data.Foldable, Data.Applicative, and
so on); though only those that play nicely with each other, so that
XMonad.Prelude can be imported unqualified without any problems.
This prevents things like `Prelude.(.)` and `Control.Category.(.)`
fighting with each other.
b) Helper functions that don't necessarily fit in any other module;
e.g., the often used abbreviation `fi = fromIntegral`.
Add functions to allow cleaning up only screens which disappear. This
works better where killing the statusbar for a specific screen is
possible. The old way is still relevant for setups which do not have
such a method (e.g., safeSpawn xmobar/spawnPipe xmonadpropwrite).
Hooks.DynamicBars was previously using an MVar and the unsafePerformIO hack (
http://www.haskell.org/haskellwiki/Top_level_mutable_state ) to store bar
state. Since ExtensibleState exists to solve these sorts of problems, I've
switched the file over to use unsafePerformIO instead.
Some functions' types had to be changed to allow access to XState, but the
public API is unchanged.
XMonad core re-exports Control.Monad.State, which includes
a function "state" if you happen to use mtl-2. Since there's
a chance xmonad still works with mtl-1 avoid imports like:
import XMonad hiding (state)
