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-rw-r--r--XMonad/Prompt.hs17
1 files changed, 16 insertions, 1 deletions
diff --git a/XMonad/Prompt.hs b/XMonad/Prompt.hs
index 0e54a4b..acea7bb 100644
--- a/XMonad/Prompt.hs
+++ b/XMonad/Prompt.hs
@@ -44,6 +44,9 @@ module XMonad.Prompt
, decodeInput
, encodeOutput
, historyCompletion
+ -- * History filters
+ , deleteAllDuplicates
+ , deleteConsecutiveDuplicates
) where
import Prelude hiding (catch)
@@ -109,11 +112,14 @@ data XPConfig =
, position :: XPPosition -- ^ Position: 'Top' or 'Bottom'
, height :: !Dimension -- ^ Window height
, historySize :: !Int -- ^ The number of history entries to be saved
+ , historyFilter :: [String] -> [String]
+ -- ^ a filter to determine which
+ -- history entries to remember
, defaultText :: String -- ^ The text by default in the prompt line
, autoComplete :: Maybe Int -- ^ Just x: if only one completion remains, auto-select it,
, showCompletionOnTab :: Bool -- ^ Only show list of completions when Tab was pressed
-- and delay by x microseconds
- } deriving (Show, Read)
+ }
data XPType = forall p . XPrompt p => XPT p
@@ -180,6 +186,7 @@ defaultXPConfig =
, position = Bottom
, height = 18
, historySize = 256
+ , historyFilter = id
, defaultText = []
, autoComplete = Nothing
, showCompletionOnTab = False
@@ -808,3 +815,11 @@ uniqSort = toList . fromList
-- from the query history stored in ~/.xmonad/history.
historyCompletion :: ComplFunction
historyCompletion x = fmap (filter (isInfixOf x) . Map.fold (++) []) readHistory
+
+-- | Functions to be used with the 'historyFilter' setting.
+-- 'deleteAllDuplicates' will remove all duplicate entries.
+-- 'deleteConsecutiveDuplicates' will remove duplicate elements which are
+-- immediately next to each other.
+deleteAllDuplicates, deleteConsecutiveDuplicates :: [String] -> [String]
+deleteAllDuplicates = nub
+deleteConsecutiveDuplicates = map head . group