Add a search predicate option to XMonad.Prompt

XMonad/Prompt.hs

@@ -139,6 +139,9 @@ data XPConfig =
         , 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
+        , searchPredicate   :: String -> String -> Bool
+                                          -- ^ Given the typed string and a possible
+                                          --   completion, is the completion valid?
         }
 
 data XPType = forall p . XPrompt p => XPT p
@@ -212,7 +215,9 @@ defaultXPConfig =
         , historyFilter     = id
         , defaultText       = []
         , autoComplete      = Nothing
-        , showCompletionOnTab = False }
+        , showCompletionOnTab = False
+        , searchPredicate   = isPrefixOf
+        }
 greenXPConfig = defaultXPConfig { fgColor = "green", bgColor = "black" }
 amberXPConfig = defaultXPConfig { fgColor = "#ca8f2d", bgColor = "black", fgHLight = "#eaaf4c" }
 

XMonad/Prompt/Window.hs

@@ -24,7 +24,6 @@ module XMonad.Prompt.Window
     ) where
 
 import qualified Data.Map as M
-import Data.List
 
 import qualified XMonad.StackSet as W
 import XMonad
@@ -89,7 +88,7 @@ doPrompt t c = do
       bringAction      = winAction bringWindow
       bringCopyAction  = winAction bringCopyWindow
 
-      compList m s = return . filter (isPrefixOf s) . map fst . M.toList $ m
+      compList m s = return . filter (searchPredicate c s) . map fst . M.toList $ m
 
 
 -- | Brings a copy of the specified window into the current workspace.