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author | Andrea Rossato <andrea.rossato@unibz.it> | 2008-02-16 14:34:54 +0100 |
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committer | Andrea Rossato <andrea.rossato@unibz.it> | 2008-02-16 14:34:54 +0100 |
commit | 0cf2ff67e2c11ed6ffcba558dfec3a906f170266 (patch) | |
tree | 5c2e51c777bd66da9676e14b9815832c9b857beb /XMonad/Prompt | |
parent | 9bebda0dc13ee465b9f5ee86fdc6ddc8132598ec (diff) | |
download | XMonadContrib-0cf2ff67e2c11ed6ffcba558dfec3a906f170266.tar.gz XMonadContrib-0cf2ff67e2c11ed6ffcba558dfec3a906f170266.tar.xz XMonadContrib-0cf2ff67e2c11ed6ffcba558dfec3a906f170266.zip |
Prompt: add some methods to make completions more flexible
- now it is possible to decide if the prompt will complete the last
word of the command line or the whole line (default is the last
word);
- completing the last word can be fine tuned by implementing
'commandToComplete' and 'completionToCommand': see comments for
details;
- move mkComplFunFromList' from TagWindows to Prompt.
darcs-hash:20080216133454-32816-86eba16c4c73357b5bf6fee185c652d5ecd75521.gz
Diffstat (limited to '')
-rw-r--r-- | XMonad/Prompt.hs | 65 |
1 files changed, 47 insertions, 18 deletions
diff --git a/XMonad/Prompt.hs b/XMonad/Prompt.hs index de132f1..2377261 100644 --- a/XMonad/Prompt.hs +++ b/XMonad/Prompt.hs @@ -20,6 +20,7 @@ module XMonad.Prompt , mkXPromptWithReturn , defaultXPConfig , mkComplFunFromList + , mkComplFunFromList' , XPType (..) , XPPosition (..) , XPConfig (..) @@ -31,12 +32,12 @@ module XMonad.Prompt , fillDrawable -- * Other Utilities -- $utils + , getNextCompletion + , getNextOfLastWord , getLastWord , skipLastWord , splitInSubListsAt , breakAtSpace - , newIndex - , newCommand , uniqSort ) where @@ -104,9 +105,10 @@ instance Show XPType where show (XPT p) = showXPrompt p instance XPrompt XPType where - showXPrompt = show - nextCompletion (XPT t) c l = nextCompletion t c l - commandToComplete (XPT t) c = commandToComplete t c + showXPrompt = show + nextCompletion (XPT t) = nextCompletion t + commandToComplete (XPT t) = commandToComplete t + completionToCommand (XPT t) = completionToCommand t -- | The class prompt types must be an instance of. In order to -- create a prompt you need to create a data type, without parameters, @@ -119,14 +121,31 @@ instance XPrompt XPType where -- > instance XPrompt Shell where -- > showXPrompt Shell = "Run: " class XPrompt t where + + -- | This method is used to print the string to be + -- displayed in the command line window. showXPrompt :: t -> String + -- | This method is used to generate the next completion to be + -- printed in the command line when tab is pressed, given the + -- string presently in the command line and the list of + -- completion. nextCompletion :: t -> String -> [String] -> String - nextCompletion t c l = newCommand t c l + nextCompletion t c l = getNextOfLastWord t c l + -- | If the prompt is using 'getNextOfLastWord' for implementing + -- 'nextCompletion' (the default implementation), this is used to + -- generate the string to be passed to the completion function. commandToComplete :: t -> String -> String commandToComplete _ c = getLastWord c + -- | If the prompt is using 'getNextOfLastWord' for implementing + -- 'nextCompletion' (the default implementation), this is used to + -- generate the string to compare each completion with the + -- command presently in the command line. + completionToCommand :: t -> String -> String + completionToCommand _ c = c + data XPPosition = Top | Bottom deriving (Show,Read) @@ -613,7 +632,7 @@ printComplString :: Display -> Drawable -> GC -> String -> String -> Position -> Position -> String -> XP () printComplString d drw gc fc bc x y s = do st <- get - if s == commandToComplete (xptype st) (command st) + if completionToCommand (xptype st) s == commandToComplete (xptype st) (command st) then printStringXMF d drw (fontS st) gc (fgHLight $ config st) (bgHLight $ config st) x y s else printStringXMF d drw (fontS st) gc fc bc x y s @@ -691,6 +710,14 @@ mkComplFunFromList _ [] = return [] mkComplFunFromList l s = return $ filter (\x -> take (length s) x == s) l +-- | This function takes a list of possible completions and returns a +-- completions function to be used with 'mkXPrompt'. If the string is +-- null it will return all completions. +mkComplFunFromList' :: [String] -> String -> IO [String] +mkComplFunFromList' l [] = return l +mkComplFunFromList' l s = + return $ filter (\x -> take (length s) x == s) l + -- Lift an IO action into the XP io :: IO a -> XP a io = liftIO @@ -705,19 +732,21 @@ splitInSubListsAt _ [] = [] splitInSubListsAt i x = f : splitInSubListsAt i rest where (f,rest) = splitAt i x --- | Given a completion and a list of possible completions, returns the --- the next completion in the list -newCommand :: XPrompt t => t -> String -> [String] -> String -newCommand t com cl = - skipLastWord com ++ (cl !! (newIndex t com cl)) +-- | Given a command and a completion list, get the next completion in +-- the list. +getNextCompletion :: String -> [String] -> String +getNextCompletion c l = l !! idx + where idx = case c `elemIndex` l of + Just i -> if i >= length l - 1 then 0 else i + 1 + Nothing -> 0 -- | Given a completion and a list of possible completions, returns the --- index of the next completion in the list -newIndex :: XPrompt t => t -> String -> [String] -> Int -newIndex t com cl = - case elemIndex (commandToComplete t com) cl of - Just i -> if i >= length cl - 1 then 0 else i + 1 - Nothing -> 0 +-- the next completion in the list +getNextOfLastWord :: XPrompt t => t -> String -> [String] -> String +getNextOfLastWord t c l = skipLastWord c ++ completionToCommand t (l !! ni) + where ni = case commandToComplete t c `elemIndex` map (completionToCommand t) l of + Just i -> if i >= length l - 1 then 0 else i + 1 + Nothing -> 0 -- | Gets the last word of a string or the whole string if formed by -- only one word |