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module Rahm.Desktop.Marking (
historyNext, historyPrev,
markCurrentWindow, pushHistory,
jumpToMark, jumpToLast, swapWithLastMark,
swapWithMark
) where
import Rahm.Desktop.Windows (mapWindows, findWindow, getLocationWorkspace)
import XMonad
import XMonad.StackSet hiding (focus)
import Data.IORef
import Data.Map (Map)
import Control.Monad (when)
import System.FilePath
import System.IO
import Control.Exception
import System.Environment
import qualified Data.Sequence as Seq
import Data.Sequence (Seq(..))
import qualified XMonad.Util.ExtensibleState as XS
import qualified Data.Map as Map
{- Submodule that handles marking windows so they can be jumped back to. -}
type Mark = Char
historySize = 100 -- max number of history elements the tail.
data History a = History [a] (Seq a)
deriving (Read, Show)
instance Default (History a) where
def = History [] Seq.empty
seqPush :: a -> Seq a -> Seq a
seqPush elem s@(seq :|> _) | Seq.length s >= historySize = elem :<| seq
seqPush elem s = elem :<| s
historyForward :: History a -> History a
historyForward (History (a:as) tail) = History as (seqPush a tail)
historyForward z = z
historyBackward :: History a -> History a
historyBackward (History head (a :<| as)) = History (a : head) as
historyBackward z = z
historyCurrent :: History a -> Maybe a
historyCurrent (History (a:_) _) = Just a
historyCurrent _ = Nothing
historyPush :: (Eq a) => a -> History a -> History a
historyPush a h@(History (w : _) _) | a == w = h
historyPush a (History (w : _) tail) = History [a] (seqPush w tail)
historyPush a (History _ tail) = History [a] tail
historySwap :: History a -> History a
historySwap (History (a:as) (t :<| ts)) = History (t : as) (seqPush a ts)
historySwap z = z
historyLast :: History a -> Maybe a
historyLast (History _ (t :<| _)) = Just t
historyLast _ = Nothing
data Spot =
WindowSpot Window | -- Focus is on a window.
TagSpot String -- Focus is on an (empty) tag
deriving (Read, Show, Eq, Ord)
greedyFocus :: Spot -> X ()
greedyFocus (WindowSpot win) = do
ws <- withWindowSet $ \ss ->
return $ getLocationWorkspace =<< findWindow ss win
mapM_ (windows . greedyView . tag) ws
focus win
greedyFocus (TagSpot tag) =
windows $ greedyView tag
data MarkState =
MarkState {
markStateMap :: Map Mark Window
, windowHistory :: History Spot
} deriving (Read, Show)
instance ExtensionClass MarkState where
initialValue = MarkState Map.empty def
extensionType = PersistentExtension
changeHistory :: (History Spot -> History Spot) -> (MarkState -> MarkState)
changeHistory fn ms = ms { windowHistory = fn (windowHistory ms)}
withMaybeFocused :: (Maybe Window -> X ()) -> X ()
withMaybeFocused f = withWindowSet $ f . peek
normalizeWindows :: X ()
normalizeWindows = do
MarkState { windowHistory = h } <- XS.get
mapM_ greedyFocus (historyCurrent h)
-- greedyFocus :: Window -> X ()
-- greedyFocus win = do
-- ws <- withWindowSet $ \ss ->
-- return $ getLocationWorkspace =<< findWindow ss win
--
-- mapM_ (windows . greedyView . tag) ws
-- focus win
markCurrentWindow :: Mark -> X ()
markCurrentWindow mark = do
withFocused $ \win ->
XS.modify $ \state@MarkState {markStateMap = ms} ->
state {
markStateMap = Map.insert mark win ms
}
pushHistory :: X () -> X ()
pushHistory fn = do
withMaybeFocused $ \maybeWindowBefore -> do
case maybeWindowBefore of
(Just windowBefore) ->
XS.modify $ changeHistory (historyPush (WindowSpot windowBefore))
Nothing ->
withWindowSet $ \ws ->
XS.modify $ changeHistory (historyPush (TagSpot (currentTag ws)))
fn
withMaybeFocused $ \maybeWindowAfter ->
case maybeWindowAfter of
Just windowAfter ->
XS.modify $ changeHistory (historyPush $ WindowSpot windowAfter)
Nothing ->
withWindowSet $ \ws ->
XS.modify $ changeHistory (historyPush $ TagSpot $ currentTag ws)
withHistory :: (History Spot -> X ()) -> X ()
withHistory fn = do
MarkState { windowHistory = w } <- XS.get
fn w
jumpToLast :: X ()
jumpToLast = do
XS.modify (changeHistory historySwap)
normalizeWindows
jumpToMark :: Mark -> X ()
jumpToMark mark = do
MarkState {markStateMap = m} <- XS.get
case Map.lookup mark m of
Nothing -> return ()
Just w -> pushHistory $
greedyFocus (WindowSpot w)
setFocusedWindow :: a -> StackSet i l a s sd -> StackSet i l a s sd
setFocusedWindow
window
(StackSet (Screen (Workspace t l stack) a b) vis hid float) =
let newStack =
case stack of
Nothing -> Nothing
Just (Stack _ up down) -> Just (Stack window up down) in
StackSet (Screen (Workspace t l newStack) a b) vis hid float
swapWithFocused :: (Ord a) => a -> StackSet i l a s sd -> StackSet i l a s sd
swapWithFocused winToSwap stackSet =
case peek stackSet of
Nothing -> stackSet
Just focused -> do
setFocusedWindow winToSwap $
mapWindows (
\w -> if w == winToSwap then focused else w) stackSet
swapWithLastMark :: X ()
swapWithLastMark = pushHistory $ withHistory $ \hist -> do
case historyLast hist of
Just (WindowSpot win) ->
windows $ swapWithFocused win
Nothing -> return ()
swapWithMark :: Mark -> X ()
swapWithMark mark = pushHistory $ do
MarkState {markStateMap = m} <- XS.get
case Map.lookup mark m of
Nothing -> return ()
Just winToSwap -> do
windows $ swapWithFocused winToSwap
historyPrev :: X ()
historyPrev = do
XS.modify $ changeHistory historyBackward
normalizeWindows
historyNext :: X ()
historyNext = do
XS.modify $ changeHistory historyForward
normalizeWindows
|
