{-# LANGUAGE ScopedTypeVariables #-}
module Properties.Screen where
import Test.QuickCheck
import Instances
import Control.Applicative
import XMonad.StackSet hiding (filter)
import XMonad.Operations
import Graphics.X11.Xlib.Types (Dimension)
import Graphics.X11 (Rectangle(Rectangle))
import XMonad.Layout
prop_screens (x :: T) = n `elem` screens x
where
n = current x
-- screens makes sense
prop_screens_works (x :: T) = screens x == current x : visible x
------------------------------------------------------------------------
-- Hints
prop_resize_inc (NonZero (NonNegative inc_w),NonZero (NonNegative inc_h)) b@(w,h) =
w' `mod` inc_w == 0 && h' `mod` inc_h == 0
where (w',h') = applyResizeIncHint a b
a = (inc_w,inc_h)
prop_resize_inc_extra ((NonNegative inc_w)) b@(w,h) =
(w,h) == (w',h')
where (w',h') = applyResizeIncHint a b
a = (-inc_w,0::Dimension)-- inc_h)
prop_resize_max (NonZero (NonNegative inc_w),NonZero (NonNegative inc_h)) b@(w,h) =
w' <= inc_w && h' <= inc_h
where (w',h') = applyMaxSizeHint a b
a = (inc_w,inc_h)
prop_resize_max_extra ((NonNegative inc_w)) b@(w,h) =
(w,h) == (w',h')
where (w',h') = applyMaxSizeHint a b
a = (-inc_w,0::Dimension)-- inc_h)
prop_aspect_hint_shrink hint (w,h) = case applyAspectHint hint (w,h) of
(w',h') -> w' <= w && h' <= h
-- applyAspectHint does nothing when the supplied (x,y) fits
-- the desired range
prop_aspect_fits =
forAll ((,,,) <$> pos <*> pos <*> pos <*> pos) $ \ (x,y,a,b) ->
let f v = applyAspectHint ((x, y+a), (x+b, y)) v
overflow = or [ mul x (y+a), mul (x+b) y ]
in not overflow ==> f (x,y) == (x,y)
where pos = choose (0, 65535)
mul a b = toInteger (a*b) /= toInteger a * toInteger b
prop_point_within r @ (Rectangle x y w h) =
forAll ((,) <$>
choose (0, fromIntegral w - 1) <*>
choose (0, fromIntegral h - 1)) $
\(dx,dy) ->
and [ dx > 0, dy > 0,
noOverflow x w,
noOverflow y h ]
==> pointWithin (x+dx) (y+dy) r
where
noOverflow a b = (a + fromIntegral (abs b)) > a
prop_point_within_mirror r (x,y) = pointWithin x y r == pointWithin y x (mirrorRect r)
