{-# OPTIONS_GHC -fglasgow-exts #-}
-----------------------------------------------------------------------------
-- |
-- Module : XMonad.Layout.Magnifier
-- Copyright : (c) Peter De Wachter and Andrea Rossato 2007
-- License : BSD-style (see xmonad/LICENSE)
--
-- Maintainer : andrea.rossato@unibz.it
-- Stability : unstable
-- Portability : unportable
--
-- Screenshot : <http://caladan.rave.org/magnifier.png>
--
-- This is a layout modifier that will make a layout increase the size
-- of the window that has focus.
--
-----------------------------------------------------------------------------
module XMonad.Layout.Magnifier
( -- * Usage
-- $usage
magnifier,
magnifier',
magnifierOff,
magnifiercz,
magnifiercz',
MagnifyMsg (..)
) where
import XMonad
import XMonad.StackSet
import XMonad.Layout.LayoutModifier
-- $usage
-- You can use this module with the following in your @~\/.xmonad\/xmonad.hs@:
--
-- > import XMonad.Layout.Magnifier
--
-- Then edit your @layoutHook@ by adding the 'magnifier' layout modifier
-- to some layout:
--
-- > myLayouts = magnifier (Tall 1 (3/100) (1/2)) ||| Full ||| etc..
-- > main = xmonad defaultConfig { layoutHook = myLayouts }
--
-- By default magnifier increases the focused window's size by 1.5.
-- You can also use:
--
-- > magnifiercz 1.2
--
-- to use a custom level of magnification. You can even make the focused
-- window smaller for a pop in effect.
--
-- For more detailed instructions on editing the layoutHook see:
--
-- "XMonad.Doc.Extending#Editing_the_layout_hook"
--
-- Magnifier supports some commands. To use them add something like
-- this to your key bindings:
--
-- > , ((modMask x .|. controlMask , xK_plus ), sendMessage MagnifyMore)
-- > , ((modMask x .|. controlMask , xK_minus), sendMessage MagnifyLess)
-- > , ((modMask x .|. controlMask , xK_o ), sendMessage ToggleOff )
-- > , ((modMask x .|. controlMask .|. shiftMask, xK_o ), sendMessage ToggleOn )
-- > , ((modMask x .|. controlMask , xK_m ), sendMessage Toggle )
--
-- Note that a few other extension modules, such as
-- "XMonad.Layout.MultiToggle" and "XMonad.Layout.ToggleLayouts", also
-- define a message named 'Toggle'. To avoid conflicts when using
-- these modules together, you can import Magnifier qualified, like
-- this:
--
-- > import qualified XMonad.Layout.Magnifier as Mag
--
-- and then prefix @Mag@ to the front of everything from this module,
-- like @Mag.Toggle@, @Mag.magnifier@, and so on.
--
-- For detailed instruction on editing the key binding see
-- "XMonad.Doc.Extending#Editing_key_bindings".
-- | Increase the size of the window that has focus
magnifier :: l a -> ModifiedLayout Magnifier l a
magnifier = ModifiedLayout (Mag 1.5 On All)
-- | Change the size of the window that has focus by a custom zoom
magnifiercz :: Rational -> l a -> ModifiedLayout Magnifier l a
magnifiercz cz = ModifiedLayout (Mag ((fromRational cz)*1.0::Double) On All)
-- | Increase the size of the window that has focus, unless if it is the
-- master window.
magnifier' :: l a -> ModifiedLayout Magnifier l a
magnifier' = ModifiedLayout (Mag 1.5 On NoMaster)
-- | Magnifier that defaults to Off
magnifierOff :: l a -> ModifiedLayout Magnifier l a
magnifierOff = ModifiedLayout (Mag 1.5 Off All)
-- | Increase the size of the window that has focus by a custom zoom,
-- unless if it is the master window.
magnifiercz' :: Rational -> l a -> ModifiedLayout Magnifier l a
magnifiercz' cz = ModifiedLayout (Mag ((fromRational cz)*1.0::Double) On NoMaster)
data MagnifyMsg = MagnifyMore | MagnifyLess | ToggleOn | ToggleOff | Toggle deriving ( Typeable )
instance Message MagnifyMsg
data Magnifier a = Mag Zoom Toggle MagnifyMaster deriving (Read, Show)
type Zoom = Double
data Toggle = On | Off deriving (Read, Show)
data MagnifyMaster = All | NoMaster deriving (Read, Show)
instance LayoutModifier Magnifier Window where
redoLayout (Mag z On All ) = applyMagnifier z
redoLayout (Mag z On NoMaster) = unlessMaster $ applyMagnifier z
redoLayout _ = nothing
where nothing _ _ wrs = return (wrs, Nothing)
handleMess (Mag z On t) m
| Just MagnifyMore <- fromMessage m = return . Just $ (Mag (z + 0.1) On t)
| Just MagnifyLess <- fromMessage m = return . Just $ (Mag (z - 0.1) On t)
| Just ToggleOff <- fromMessage m = return . Just $ (Mag (z ) Off t)
| Just Toggle <- fromMessage m = return . Just $ (Mag (z ) Off t)
handleMess (Mag z Off t) m
| Just ToggleOn <- fromMessage m = return . Just $ (Mag z On t)
| Just Toggle <- fromMessage m = return . Just $ (Mag z On t)
handleMess _ _ = return Nothing
modifierDescription (Mag _ On All ) = "Magnifier"
modifierDescription (Mag _ On NoMaster) = "Magnifier NoMaster"
modifierDescription (Mag _ Off _ ) = "Magnifier (off)"
type NewLayout a = Rectangle -> Stack a -> [(Window, Rectangle)] -> X ([(Window, Rectangle)], Maybe (Magnifier a))
unlessMaster :: NewLayout a -> NewLayout a
unlessMaster mainmod r s wrs = if null (up s) then return (wrs, Nothing)
else mainmod r s wrs
applyMagnifier :: Double -> Rectangle -> t -> [(Window, Rectangle)] -> X ([(Window, Rectangle)], Maybe a)
applyMagnifier z r _ wrs = do focused <- withWindowSet (return . peek)
let mag (w,wr) ws | focused == Just w = ws ++ [(w, fit r $ magnify z wr)]
| otherwise = (w,wr) : ws
return (reverse $ foldr mag [] wrs, Nothing)
magnify :: Double -> Rectangle -> Rectangle
magnify zoom (Rectangle x y w h) = Rectangle x' y' w' h'
where x' = x - fromIntegral (w' - w) `div` 2
y' = y - fromIntegral (h' - h) `div` 2
w' = round $ fromIntegral w * zoom
h' = round $ fromIntegral h * zoom
fit :: Rectangle -> Rectangle -> Rectangle
fit (Rectangle sx sy sw sh) (Rectangle x y w h) = Rectangle x' y' w' h'
where x' = max sx (x - (max 0 (x + fi w - sx - fi sw)))
y' = max sy (y - (max 0 (y + fi h - sy - fi sh)))
w' = min sw w
h' = min sh h
fi :: (Num b, Integral a) => a -> b
fi = fromIntegral
