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|
{-# LANGUAGE FlexibleInstances, MultiParamTypeClasses, DeriveDataTypeable #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Layout.Spacing
-- Copyright : (c) Brent Yorgey
-- License : BSD-style (see LICENSE)
--
-- Maintainer : <byorgey@gmail.com>
-- Stability : unstable
-- Portability : portable
--
-- Add a configurable amount of space around windows.
-----------------------------------------------------------------------------
module XMonad.Layout.Spacing (
-- * Usage
-- $usage
spacing, Spacing,
spacingWithEdge, SpacingWithEdge,
smartSpacing, SmartSpacing,
smartSpacingWithEdge, SmartSpacingWithEdge,
SpacingMsg(..)
) where
import Graphics.X11 (Rectangle(..))
import Control.Arrow (second)
import XMonad.Core (runLayout,Message,fromMessage,Typeable)
import XMonad.StackSet (up, down, Workspace(..))
import XMonad.Util.Font (fi)
import XMonad.Layout.LayoutModifier
-- $usage
-- You can use this module by importing it into your @~\/.xmonad\/xmonad.hs@ file:
--
-- > import XMonad.Layout.Spacing
--
-- and modifying your layoutHook as follows (for example):
--
-- > layoutHook = spacing 2 $ Tall 1 (3/100) (1/2)
-- > -- put a 2px space around every window
--
-- | Surround all windows by a certain number of pixels of blank space.
spacing :: Int -> l a -> ModifiedLayout Spacing l a
spacing p = ModifiedLayout (Spacing p)
data Spacing a = Spacing Int deriving (Show, Read)
-- | Message to dynamically increase, decrease or set the size of the window spacing
data SpacingMsg = SetSpacing Int | IncSpacing Int deriving (Show,Read,Eq,Typeable)
instance Message SpacingMsg
instance LayoutModifier Spacing a where
pureModifier (Spacing p) _ _ wrs = (map (second $ shrinkRect p) wrs, Nothing)
pureMess (Spacing px) m
| Just (SetSpacing px') <- fromMessage m = Just $ Spacing (max 0 px')
| Just (IncSpacing n) <- fromMessage m = Just $ Spacing (max 0 (px+n))
| otherwise = Nothing
modifierDescription (Spacing p) = "Spacing " ++ show p
-- | Surround all windows by a certain number of pixels of blank space, and
-- additionally adds the same amount of spacing around the edge of the screen.
spacingWithEdge :: Int -> l a -> ModifiedLayout SpacingWithEdge l a
spacingWithEdge p = ModifiedLayout (SpacingWithEdge p)
data SpacingWithEdge a = SpacingWithEdge Int deriving (Show, Read)
instance LayoutModifier SpacingWithEdge a where
pureModifier (SpacingWithEdge p) _ _ wrs = (map (second $ shrinkRect p) wrs, Nothing)
pureMess (SpacingWithEdge px) m
| Just (SetSpacing px') <- fromMessage m = Just $ SpacingWithEdge (max 0 px')
| Just (IncSpacing n) <- fromMessage m = Just $ SpacingWithEdge (max 0 (px+n))
| otherwise = Nothing
modifyLayout (SpacingWithEdge p) w r = runLayout w (shrinkRect p r)
modifierDescription (SpacingWithEdge p) = "SpacingWithEdge " ++ show p
shrinkRect :: Int -> Rectangle -> Rectangle
shrinkRect p (Rectangle x y w h) = Rectangle (x+fi p) (y+fi p) (w-2*fi p) (h-2*fi p)
-- | Surrounds all windows with blank space, except when the window is the only
-- visible window on the current workspace.
smartSpacing :: Int -> l a -> ModifiedLayout SmartSpacing l a
smartSpacing p = ModifiedLayout (SmartSpacing p)
data SmartSpacing a = SmartSpacing Int deriving (Show, Read)
instance LayoutModifier SmartSpacing a where
pureModifier _ _ _ [x] = ([x], Nothing)
pureModifier (SmartSpacing p) _ _ wrs = (map (second $ shrinkRect p) wrs, Nothing)
modifierDescription (SmartSpacing p) = "SmartSpacing " ++ show p
-- | Surrounds all windows with blank space, and adds the same amount of spacing
-- around the edge of the screen, except when the window is the only visible
-- window on the current workspace.
smartSpacingWithEdge :: Int -> l a -> ModifiedLayout SmartSpacingWithEdge l a
smartSpacingWithEdge p = ModifiedLayout (SmartSpacingWithEdge p)
data SmartSpacingWithEdge a = SmartSpacingWithEdge Int deriving (Show, Read)
instance LayoutModifier SmartSpacingWithEdge a where
pureModifier _ _ _ [x] = ([x], Nothing)
pureModifier (SmartSpacingWithEdge p) _ _ wrs = (map (second $ shrinkRect p) wrs, Nothing)
modifyLayout (SmartSpacingWithEdge p) w r
| maybe False (\s -> null (up s) && null (down s)) (stack w) = runLayout w r
| otherwise = runLayout w (shrinkRect p r)
modifierDescription (SmartSpacingWithEdge p) = "SmartSpacingWithEdge " ++ show p
|
