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46 lines
1.8 KiB
Haskell
46 lines
1.8 KiB
Haskell
{-# LANGUAGE ScopedTypeVariables #-}
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{-# OPTIONS_GHC -fno-warn-missing-signatures #-}
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module SwapWorkspaces where
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import Instances
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import Test.QuickCheck
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import XMonad.StackSet
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import XMonad.Actions.SwapWorkspaces
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-- Ensures that no "loss of information" can happen from a swap.
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prop_double_swap (ss :: T) (NonNegative t1) (NonNegative t2) =
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t1 `tagMember` ss && t2 `tagMember` ss ==>
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ss == swap (swap ss)
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where swap = swapWorkspaces t1 t2
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-- Degrade nicely when given invalid data.
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prop_invalid_swap (ss :: T) (NonNegative t1) (NonNegative t2) =
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not (t1 `tagMember` ss || t2 `tagMember` ss) ==>
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ss == swapWorkspaces t1 t2 ss
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-- This doesn't pass yet. Probably should.
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-- prop_half_invalid_swap (ss :: T) (NonNegative t1) (NonNegative t2) =
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-- t1 `tagMember` ss && not (t2 `tagMember` ss) ==>
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-- ss == swapWorkspaces t1 t2 ss
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zipWorkspacesWith :: (Workspace i l a -> Workspace i l a -> n) -> StackSet i l a s sd ->
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StackSet i l a s sd -> [n]
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zipWorkspacesWith f s t = f (workspace $ current s) (workspace $ current t) :
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zipWith f (map workspace $ visible s) (map workspace $ visible t) ++
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zipWith f (hidden s) (hidden t)
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-- Swap only modifies the workspaces tagged t1 and t2 -- leaves all others alone.
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prop_swap_only_two (ss :: T) (NonNegative t1) (NonNegative t2) =
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t1 `tagMember` ss && t2 `tagMember` ss ==>
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and $ zipWorkspacesWith mostlyEqual ss (swapWorkspaces t1 t2 ss)
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where mostlyEqual w1 w2 = map tag [w1, w2] `elem` [[t1, t2], [t2, t1]] || w1 == w2
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-- swapWithCurrent stays on current
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prop_swap_with_current (ss :: T) (NonNegative t) =
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t `tagMember` ss ==>
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layout before == layout after && stack before == stack after
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where before = workspace $ current ss
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after = workspace $ current $ swapWithCurrent t ss
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