Hierarchify

XMonad/Layout/NoBorders.hs

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+{-# LANGUAGE FlexibleContexts, FlexibleInstances, MultiParamTypeClasses, TypeSynonymInstances #-}
+
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  XMonad.Layout.NoBorders
+-- Copyright   :  (c) David Roundy <droundy@darcs.net>
+-- License     :  BSD3-style (see LICENSE)
+--
+-- Maintainer  :  David Roundy <droundy@darcs.net>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-- Make a given layout display without borders.  This is useful for
+-- full-screen or tabbed layouts, where you don't really want to waste a
+-- couple of pixels of real estate just to inform yourself that the visible
+-- window has focus.
+--
+-----------------------------------------------------------------------------
+
+module XMonad.Layout.NoBorders (
+                                -- * Usage
+                                -- $usage
+                                noBorders,
+                                smartBorders,
+                                withBorder
+                               ) where
+
+import Control.Monad.State (gets)
+import Control.Monad.Reader (asks)
+import Graphics.X11.Xlib
+
+import XMonad
+import XMonad.Layout.LayoutModifier
+import qualified XMonad.StackSet as W
+import Data.List ((\\))
+
+-- $usage
+-- You can use this module with the following in your Config.hs file:
+--
+-- > import XMonad.Layout.NoBorders
+--
+-- and modify the layouts to call noBorders on the layouts you want to lack
+-- borders
+--
+-- > layouts = [ Layout (noBorders Full), ... ]
+--
+
+-- %import XMonad.Layout.NoBorders
+-- %layout -- prepend noBorders to default layouts above to remove their borders, like so:
+-- %layout , noBorders Full
+
+-- todo, use an InvisibleList.
+data WithBorder a = WithBorder Dimension [a] deriving ( Read, Show )
+
+instance LayoutModifier WithBorder Window where
+    modifierDescription (WithBorder 0 _) = "NoBorders"
+    modifierDescription (WithBorder n _) = "Borders " ++ show n
+
+    unhook (WithBorder _ s) = asks (borderWidth . config) >>= setBorders s
+
+    redoLayout (WithBorder n s) _ _ wrs = do
+        asks (borderWidth . config) >>= setBorders (s \\ ws)
+        setBorders ws n
+        return (wrs, Just $ WithBorder n ws)
+     where
+        ws = map fst wrs
+
+noBorders :: LayoutClass l Window => l Window -> ModifiedLayout WithBorder l Window
+noBorders = ModifiedLayout $ WithBorder 0 []
+
+withBorder :: LayoutClass l a => Dimension -> l a -> ModifiedLayout WithBorder l a
+withBorder b = ModifiedLayout $ WithBorder b []
+
+setBorders :: [Window] -> Dimension -> X ()
+setBorders ws bw = withDisplay $ \d -> mapM_ (\w -> io $ setWindowBorderWidth d w bw) ws
+
+data SmartBorder a = SmartBorder [a] deriving (Read, Show)
+
+instance LayoutModifier SmartBorder Window where
+    modifierDescription _ = "SmartBorder"
+
+    unhook (SmartBorder s) = asks (borderWidth . config) >>= setBorders s
+
+    redoLayout (SmartBorder s) _ _ wrs = do
+        ss <- gets (W.screens . windowset)
+
+        if singleton ws && singleton ss
+            then do
+                asks (borderWidth . config) >>= setBorders (s \\ ws)
+                setBorders ws 0
+                return (wrs, Just $ SmartBorder ws)
+            else do
+                asks (borderWidth . config) >>= setBorders s
+                return (wrs, Just $ SmartBorder [])
+     where
+        ws = map fst wrs
+        singleton = null . drop 1
+
+--
+-- | You can cleverly set no borders on a range of layouts, using a
+-- layoutHook like so:
+--
+-- > layoutHook = Layout $ smartBorders $ Select layouts
+--
+smartBorders :: LayoutClass l a => l a -> ModifiedLayout SmartBorder l a
+smartBorders = ModifiedLayout (SmartBorder [])