-- module GUI where {- | The program manages a number of threads: GUI: The GUI shall be responsive also if a program is loaded or a term is reduced. Thus the GUI has its own thread. If a GUI element requires a more complicated action, it sends an Action message via the 'input' Chan to the 'machine'. It does not have direct access to the 'program'. machine: This thread manages loading and parsing of modules as well as the operation mode of the interpreter. It gets most of its messages from the GUI and sends its result as GuiUpdate via the 'output' Chan to the GUI. It is the only thread that is allowed to modify the 'program'. Thus it sequences all accesses to 'program' and warrants atomic modification (a single read-write sequence) even outside the STM monad. execute: This runs the interpreter. It reduces expressions and sends according MIDI messages or waits according to Wait events. It can read the current state of the 'program' but is not allowed to modify it. ALSA: With ALSA we can wait only for all kinds of events at once. Thus this thread receives all incoming messages and distributes them to the right receiver. E.g. NoteOn events are sent to the GUI as text inserts and Echo messages are sent to the 'execute' thread for handling Wait events. HTTPServer: Waits for and responds to incoming HTTP requests. -} import qualified IO import qualified TermFocus import qualified Term import qualified Time import qualified Program import qualified Exception import qualified Module import qualified Controls import qualified Rewrite import qualified Option import qualified Log import Program ( Program ) import TermFocus ( TermFocus ) import Term ( Term, Identifier ) import Option.Utility ( exitFailureMsg ) import Utility.WX ( cursor, editable, notebookSelection, splitterWindowSetSashGravity ) import qualified HTTPServer.GUI as HTTPGui import qualified Graphics.UI.WX as WX import Graphics.UI.WX.Attributes ( Prop((:=)), set, get ) import Graphics.UI.WX.Classes ( itemAppend, items, checkable, checked, clientSize, close, enabled, font, help, text, visible ) import Graphics.UI.WX.Controls ( Notebook, TextCtrl, wrap, focusOn, columns, listEvent, Align(AlignLeft, AlignRight), Wrap(WrapNone) ) import Graphics.UI.WX.Events ( on, closing, command ) import Graphics.UI.WX.Layout ( widget, container, layout, margin ) import Graphics.UI.WX.Types ( Color, rgb, fontFixed, Point2(Point), sz, varCreate, varSwap, varUpdate ) import Control.Concurrent ( forkIO ) import qualified Control.Concurrent.Split.MVar as MVar import qualified Control.Concurrent.Split.Chan as Chan import qualified Control.Concurrent.STM.Split.Chan as TChan import Control.Concurrent.STM.TVar ( TVar, newTVarIO, readTVarIO, readTVar, writeTVar ) import Control.Concurrent.STM.TMVar ( TMVar, newTMVarIO, putTMVar, readTMVar, takeTMVar ) import Utility.Concurrent ( MonadSTM, writeTMVar, liftSTM ) import Control.Monad.STM ( STM ) import qualified Control.Monad.STM as STM import Data.IORef ( IORef, newIORef, readIORef, writeIORef, modifyIORef ) import qualified Graphics.UI.WXCore as WXCore import qualified Graphics.UI.WXCore.WxcClassesAL as WXCAL import qualified Graphics.UI.WXCore.WxcClassesMZ as WXCMZ import Graphics.UI.WXCore.WxcDefs ( wxID_HIGHEST ) import qualified Graphics.UI.WXCore.Events as WXEvent import qualified Event import Foreign.Ptr ( Ptr ) import Foreign.Storable ( peek ) import Foreign.Marshal.Alloc ( alloca ) import qualified Foreign.C.Types as C import qualified ALSA import qualified Sound.ALSA.Sequencer as SndSeq import qualified Sound.MIDI.Message.Channel.Voice as VM import qualified Control.Monad.Trans.State as MS import qualified Control.Monad.Trans.Writer as MW import qualified Control.Monad.Exception.Synchronous as Exc import Control.Monad.IO.Class ( liftIO ) import Control.Monad.Trans.Class ( lift ) import Control.Monad ( when, liftM, liftM2, forever ) import Control.Functor.HT ( void ) import Data.Foldable ( forM_ ) import Data.Traversable ( forM ) import qualified Text.ParserCombinators.Parsec as Parsec import qualified Text.ParserCombinators.Parsec.Pos as Pos import qualified Text.ParserCombinators.Parsec.Token as Token import Control.Exception ( bracket, finally, try ) import qualified System.IO as IO import qualified System.IO.Error as Err import qualified System.FilePath as FilePath import qualified Data.Accessor.Monad.Trans.State as AccM import qualified Data.Accessor.Basic as Acc import qualified Data.Accessor.Tuple as AccTuple import qualified Data.Foldable as Fold import qualified Data.Sequence as Seq import qualified Data.Map as M import qualified Data.Monoid as Mn import qualified Data.Char as Char import qualified Data.List as List import Data.Tuple.HT ( mapFst, mapSnd ) import Data.Bool.HT ( if' ) import Data.Maybe ( mapMaybe, maybeToList ) import Prelude hiding ( log ) -- | read rules files, should contain definition for "main" main :: IO () main = do IO.hSetBuffering IO.stderr IO.LineBuffering opt <- Option.get (mainMod, p) <- Exc.resolveT (exitFailureMsg . Exception.multilineFromMessage) $ case Option.moduleNames opt of [] -> return $ let name = Module.Name "Main" in (name, Program.singleton $ Module.empty name) names@(mainModName:_) -> {- If a file is not found, we setup an empty module. If a file exists but contains parse errors then we abort loading. -} fmap ((,) mainModName) $ flip MS.execStateT Program.empty $ mapM_ (\name -> do epath <- lift $ lift $ Exc.tryT $ Program.chaseFile (Option.importPaths opt) (Module.makeFileName name) case epath of Exc.Success path -> do voidStateT $ Program.load (Option.importPaths opt) (Module.deconsName name) path Exc.Exception _ -> voidStateT $ Exception.lift . Program.addModule (Module.empty name)) names (guiIn,guiOut) <- Chan.new (machineIn,machineOut) <- TChan.newIO STM.atomically $ registerProgram machineIn mainMod p ALSA.withSequencer opt $ \sq -> do flip finally (ALSA.runSend sq ALSA.stopQueue) $ WX.start $ do gui guiIn machineIn (forEvent machineOut) void $ forkIO $ machine guiOut machineIn (processMidiCommand guiIn machineIn) (Option.limits opt) (Option.importPaths opt) p sq void $ forkIO $ HTTPGui.run (HTTPGui.methods (TChan.writeIO machineIn . HTTP)) (Option.httpOption opt) -- | messages that are sent from GUI to machine data Action = Execution Execution | Modification Modification | Control Controls.Event data Execution = Mode Event.WaitMode | SwitchMode | Restart | Stop | NextStep Event.Continue | PlayTerm MarkedText | ApplyTerm MarkedText data Modification = Load FilePath | NewModule | CloseModule Module.Name | FlushModules Module.Name | RefreshModule (Maybe (MVar.In HTTPGui.Feedback)) Module.Name String Int -- ^ MVar of the HTTP server, modulename, sourcetext, position -- | messages that are sent from machine to GUI data GuiUpdate = ReductionSteps { _steps :: [ Rewrite.Source ] } | CurrentTerm { _range :: (Int, Int), _currentTerm :: String } | Exception { _message :: Exception.Message } | Register { _mainModName :: Module.Name, _modules :: M.Map Module.Name Module.Module } | Refresh { _moduleName :: Module.Name, _content :: String, _position :: Int } | SelectPage Module.Name ( Maybe Term.Range ) | InsertPage { _activate :: Bool, _module :: Module.Module } | DeletePage Module.Name | RenamePage Module.Name Module.Name | RebuildControls Controls.Assignments | InsertText { _insertedText :: String } | StatusLine { _statusLine :: String } | HTTP HTTPGui.GuiUpdate | Running { _runningMode :: Event.WaitMode } | ResetDisplay -- | the messages describe the steps towards the stateTerm data State = State { stateMessages :: Maybe [ Rewrite.Message ], stateTerm :: Term } initialState :: State initialState = State Nothing Term.mainName stateFromTerm :: Term -> State stateFromTerm t = State Nothing t exceptionToGUI :: TChan.In GuiUpdate -> Exc.ExceptionalT Exception.Message STM () -> STM () exceptionToGUI output = Exc.resolveT (TChan.write output . Exception) exceptionToGUIIO :: TChan.In GuiUpdate -> Exc.ExceptionalT Exception.Message IO () -> IO () exceptionToGUIIO output = Exc.resolveT (TChan.writeIO output . Exception) parseTerm :: (Monad m, IO.Input a) => MarkedText -> Exc.ExceptionalT Exception.Message m a parseTerm (MarkedText pos str) = case Parsec.parse (Parsec.setPosition pos >> Parsec.between (Token.whiteSpace Term.lexer) Parsec.eof IO.input) "" str of Left msg -> Exc.throwT $ Exception.messageFromParserError msg Right t -> return t processMidiCommand :: Chan.In Action -> TChan.In GuiUpdate -> Event.Command -> IO () processMidiCommand machineChan guiChan cmd = case cmd of Event.NoteInput p -> TChan.writeIO guiChan . InsertText . formatPitch $ p Event.Transportation trans -> case trans of Event.Play -> Chan.write machineChan $ Execution Restart Event.Stop -> Chan.write machineChan $ Execution Stop Event.Pause -> Chan.write machineChan $ Execution SwitchMode Event.Forward -> Chan.write machineChan $ Execution $ NextStep Event.NextElement formatPitch :: VM.Pitch -> String formatPitch p = let (oct,cls) = divMod (VM.fromPitch p) 12 name = case cls of 00 -> "c" 01 -> "cs" 02 -> "d" 03 -> "ds" 04 -> "e" 05 -> "f" 06 -> "fs" 07 -> "g" 08 -> "gs" 09 -> "a" 10 -> "as" 11 -> "b" _ -> error "pitch class must be a number from 0 to 11" in "note qn (" ++ name ++ " " ++ show (oct-1) ++ ") : " formatModuleList :: [Module.Name] -> String formatModuleList = List.intercalate ", " . map Module.deconsName {- We do not put the program update into a big a STM because loading new imported modules may take a while and blocking access to 'program' would block the read access by the interpreter. -} modifyModule :: [ FilePath ] -> TVar Program -> TChan.In GuiUpdate -> Module.Name -> String -> Int -> IO (Maybe Exception.Message) modifyModule importPaths program output moduleName sourceCode pos = do p <- readTVarIO program Exception.switchT (\e -> do TChan.writeIO output $ Exception e return $ Just e) (\(newP, updates) -> do STM.atomically $ do mapM_ ( TChan.write output ) updates writeTVar program newP -- Log.put "parsed and modified OK" return Nothing) $ do let exception = Exception.Message Exception.Parse (Module.nameRange moduleName) previous <- case M.lookup moduleName $ Program.modules p of Nothing -> Exc.throwT $ exception $ Module.tellName moduleName ++ " does no longer exist" Just m -> return m m <- Exception.lift $ Module.parse (Module.deconsName moduleName) (Module.sourceLocation previous) sourceCode {- My first thought was that renaming of modules should be generally forbidden via HTTP. My second thought was that renaming of modules can be easily allowed or forbidden using the separation marker. Actually currently renaming via HTTP is not possible, because the separation marker is not allowed before the 'module' line. If you like to strictly forbid renaming in some circumstances, then make 'allowRename' a parameter of the function. -} let allowRename = True MW.runWriterT $ do p1 <- if' (moduleName == Module.name m) (lift $ Exception.lift $ Program.replaceModule m p) $ if' allowRename (do lift $ Exc.assertT (exception $ Module.tellName (Module.name m) ++ " already exists") (not $ M.member (Module.name m) $ Program.modules p) MW.tell [ RenamePage moduleName (Module.name m) ] lift $ Exception.lift $ Program.addModule m $ Program.removeModule moduleName p) $ (lift $ Exc.throwT $ exception "module name does not match page name and renaming is disallowed") p2 <- lift $ Program.chaseImports importPaths m p1 MW.tell $ map (InsertPage False) $ M.elems $ M.difference ( Program.modules p2 ) ( Program.modules p1 ) -- Refresh must happen after a Rename MW.tell [ Refresh (Module.name m) sourceCode pos, RebuildControls $ Program.controls p2 ] return p2 registerProgram :: TChan.In GuiUpdate -> Module.Name -> Program -> STM () registerProgram output mainModName p = do TChan.write output $ Register mainModName $ Program.modules p TChan.write output $ RebuildControls $ Program.controls p updateProgram :: TVar Program -> TChan.In GuiUpdate -> Program -> STM () updateProgram program output p = do liftSTM $ writeTVar program p liftSTM $ TChan.write output $ RebuildControls $ Program.controls p {- This runs concurrently and is fed with changes to the modules by the GUI. It parses them and provides the parsed modules to the execution engine. Since parsing is a bit of work we can keep the GUI and the execution of code going while parsing. -} machine :: Chan.Out Action -- ^ machine reads program text from here -- (module name, module contents) -> TChan.In GuiUpdate -- ^ and writes output to here -- (log message (for highlighting), current term) -> (Event.Command -> IO ()) -> Option.Limits -> [FilePath] -> Program -- ^ initial program -> ALSA.Sequencer SndSeq.DuplexMode -> IO () machine input output procMidi limits importPaths progInit sq = do program <- newTVarIO progInit term <- newTMVarIO initialState (waitIn,waitOut) <- Chan.new void $ forkIO $ forever $ do action <- Chan.read input let withMode mode send transaction = do Chan.write waitIn $ Event.AlsaSend send Chan.write waitIn $ Event.ModeChange mode STM.atomically $ do TChan.write output $ Running mode transaction setMode mode = flip (withMode mode) (return ()) $ case mode of Event.RealTime -> ALSA.continueQueue Event.SlowMotion _ -> ALSA.continueQueue Event.SingleStep _ -> ALSA.pauseQueue case action of Control event -> do Log.put $ show event STM.atomically $ exceptionToGUI output $ do p <- lift $ readTVar program p' <- Exception.lift $ Controls.changeControllerModule p event lift $ writeTVar program p' -- return $ Controls.getControllerModule p' -- Log.put $ show m Execution exec -> case exec of Mode mode -> setMode mode SwitchMode -> Chan.write waitIn $ Event.SwitchMode setMode Restart -> withMode Event.RealTime Event.forwardQuietContinueQueue (writeTMVar term initialState) Stop -> withMode Event.singleStep Event.forwardStopQueue (writeTMVar term initialState) NextStep cont -> Chan.write waitIn $ Event.NextStep cont PlayTerm txt -> exceptionToGUIIO output $ do t <- parseTerm txt lift $ withMode Event.RealTime Event.forwardQuietContinueQueue (writeTMVar term $ stateFromTerm t) ApplyTerm txt -> exceptionToGUIIO output $ do fterm <- parseTerm txt case fterm of Term.Node f xs -> lift $ STM.atomically $ do t0 <- readTMVar term let t1 = Term.Node f (xs ++ [stateTerm t0]) writeTMVar term $ stateFromTerm t1 TChan.write output $ uncurry CurrentTerm $ TermFocus.format $ TermFocus.fromTerm t1 TChan.write output $ StatusLine $ "applied function term " ++ show (markedString txt) _ -> Exc.throwT . Exception.Message Exception.Parse (Term.termRange fterm) $ "tried to apply the non-function term " ++ show (markedString txt) Modification modi -> case modi of RefreshModule feedback moduleName sourceCode pos -> do Log.put $ Module.tellName moduleName ++ " has new input\n" ++ sourceCode case feedback of Nothing -> void $ modifyModule importPaths program output moduleName sourceCode pos Just mvar -> do x <- modifyModule importPaths program output moduleName sourceCode pos MVar.put mvar $ Exc.Success (fmap Exception.multilineFromMessage x, sourceCode) Load filePath -> do Log.put $ "load " ++ filePath ++ " and all its dependencies" exceptionToGUIIO output $ do let stem = FilePath.takeBaseName filePath p <- Program.load importPaths stem filePath Program.empty lift $ do withMode Event.RealTime Event.forwardQuietContinueQueue $ do writeTVar program p writeTMVar term initialState registerProgram output (Module.Name stem) p Log.put "chased and parsed OK" NewModule -> STM.atomically $ do prg <- readTVar program let modName = head $ filter (not . flip M.member (Program.modules prg)) $ map (Module.Name . ("New"++)) $ "" : map show (iterate (1+) (1::Integer)) modu = Module.empty modName case Program.addModule modu prg of Exc.Exception e -> error ("new module has no declarations and thus should not lead to conflicts with existing modules - " ++ Exception.statusFromMessage e) Exc.Success newPrg -> liftSTM $ updateProgram program output newPrg liftSTM $ TChan.write output $ InsertPage True modu CloseModule modName -> STM.atomically $ exceptionToGUI output $ Exc.mapExceptionT (Module.inoutExceptionMsg modName . ("cannot close module: " ++)) $ do prg <- liftSTM $ readTVar program let modules = Program.modules prg importingModules = M.keys $ M.filter (elem modName . map Module.source . Module.imports) $ M.delete modName modules flip Exc.assertT (null importingModules) $ "it is still imported by " ++ formatModuleList importingModules flip Exc.assertT (M.member modName modules) $ "it does not exist" flip Exc.assertT (M.size modules > 1) $ "there must remain at least one module" liftSTM $ updateProgram program output $ Program.removeModule modName prg liftSTM $ TChan.write output $ DeletePage modName FlushModules modName -> STM.atomically $ do prg <- readTVar program let (removed, minPrg) = Program.minimize modName prg updateProgram program output minPrg Fold.mapM_ (TChan.write output . DeletePage) removed (delayedUpdatesIn, delayedUpdatesOut) <- Chan.new void $ forkIO $ Event.listen sq procMidi ( STM.atomically . mapM_ (TChan.write output) =<< Chan.read delayedUpdatesOut ) waitIn ALSA.runSend sq ALSA.startQueue Event.runState $ execute limits program term delayedUpdatesIn ( TChan.writeIO output . Exception ) sq waitOut execute :: Option.Limits -> TVar Program -- ^ current program (GUI might change the contents) -> TMVar State -- ^ current term -> Chan.In [ GuiUpdate ] -- ^ sink for time-stamped delayed messages (show current term) -> ( Exception.Message -> IO () ) -- ^ sink for asynchronous warnings (currently feedback from festival) -> ALSA.Sequencer SndSeq.DuplexMode -- ^ for playing MIDI events -> Chan.Out Event.WaitResult -> MS.StateT Event.State IO () execute limits program term delayedUpdatesIn sendWarning sq waitChan = forever $ do {- executeStep may call stopQueueLater in case of an exception. Thus we must register the visualisation trigger before that event, in order to display the exception. -} void $ Event.runSend sq $ Event.sendEcho Event.visualizeId (ALSA.latencyNano sq) (mdur, updates) <- MW.runWriterT $ do waiting <- lift $ AccM.get Event.stateWaiting when waiting $ writeUpdate ResetDisplay maxEventsSat <- lift $ checkMaxEvents limits executeStep limits program term sendWarning sq maxEventsSat {- This update will take effect when the above visualisation trigger event arrives. -} lift $ Chan.write delayedUpdatesIn updates Event.wait sq waitChan mdur {- We maintain the timestamps of the last 'maxEvents' events, including 'Wait's. Then we check whether the earliest stored event is old enough. -} checkMaxEvents :: (Monad m) => Option.Limits -> MS.StateT Event.State m Bool checkMaxEvents limits = do mode <- AccM.get Event.stateWaitMode case mode of Event.RealTime -> do current <- AccM.get Event.stateTime recent <- AccM.get Event.stateRecentTimes cont <- case Seq.viewl recent of Seq.EmptyL -> return True past Seq.:< ts -> if' (Seq.length recent < Option.maxEvents limits) (return True) $ if' (Mn.mappend past (Time.up $ Time.up $ Option.eventPeriod limits) <= current) (AccM.set Event.stateRecentTimes ts >> return True) (AccM.set Event.stateRecentTimes Seq.empty >> return False) AccM.modify Event.stateRecentTimes (Seq.|> current) return cont _ -> do AccM.set Event.stateRecentTimes Seq.empty return True executeStep :: Option.Limits -> TVar Program -> TMVar State -> ( Exception.Message -> IO () ) -> ALSA.Sequencer SndSeq.DuplexMode -> Bool -> MW.WriterT [ GuiUpdate ] ( MS.StateT Event.State IO ) ( Maybe ALSA.Time ) executeStep limits program term sendWarning sq maxEventsSat = do waitMode <- lift $ AccM.get Event.stateWaitMode Exception.switchT (\e -> do -- liftIO $ ALSA.stopQueue sq currentTime <- lift $ AccM.get Event.stateTime liftIO $ Log.put "executeStep: stopQueueLater" newTime <- liftIO $ ALSA.runSend sq $ ALSA.stopQueueLater currentTime -- Chan.write waitChan $ Event.ModeChange Event.SingleStep writeUpdate $ Exception e writeUpdate $ Running Event.singleStep {- We have to alter the mode directly, since waitChan is only read when we wait for a duration other than Nothing -} lift $ AccM.set Event.stateWaitMode Event.singleStep lift $ AccM.set Event.stateTime newTime return Nothing) (\(mx,s) -> do {- exceptions on processing an event are not fatal and we keep running -} wait <- case mx of Nothing -> return Nothing Just x -> Exc.resolveT (fmap (const Nothing) . writeUpdate . Exception) (Exc.mapExceptionalT lift $ Event.play sq sendWarning x) waiting <- lift $ AccM.get Event.stateWaiting {- This way the term will be pretty printed in the GUI thread which may block the GUI thread. However evaluating it here may defer playing notes, which is not better. -} when (waiting || waitMode /= Event.RealTime) $ writeUpdate $ uncurry CurrentTerm $ TermFocus.format s {- liftIO $ Log.put $ "term size: " ++ ( show $ length $ Term.subterms s ) ++ ", term depth: " ++ ( show $ length $ Term.breadths s ) -} return wait) (Exc.mapExceptionalT (MW.mapWriterT (liftIO . STM.atomically)) $ flip Exc.catchT (\(pos,msg) -> do liftSTM $ putTMVar term initialState Exc.throwT $ Exception.Message Exception.Term pos msg) $ computeStep limits program term maxEventsSat waitMode) computeStep :: (MonadSTM m) => Option.Limits -> TVar Program -> TMVar State -> Bool -> Event.WaitMode -> Exc.ExceptionalT (Term.Range, String) (MW.WriterT [GuiUpdate] m) (Maybe Term, TermFocus) computeStep limits program term maxEventsSat waitMode = do t <- liftSTM $ takeTMVar term p <- liftSTM $ readTVar program {- this happens anew at each click since the program text might have changed in the editor -} Exc.assertT (Term.termRange $ stateTerm t, "too many events in a too short period") maxEventsSat let forceHead = Exc.mapExceptionalT (liftM (\(ms,msgs) -> fmap ((,) msgs) ms) . MW.runWriterT) $ Rewrite.runEval (Option.maxReductions limits) p (Rewrite.forceHead $ stateTerm t) nextReduction = do (msgs, nt) <- case stateMessages t of Nothing -> forceHead Just msgs -> return (msgs, stateTerm t) case splitAtReduction msgs of (steps, Just (red, rest)) -> return (steps, red, Just (rest, nt)) (steps, Nothing) -> return (steps, TermFocus.fromTerm nt, Nothing) (steps, focusedTerm, mst) <- case waitMode of Event.SingleStep Event.NextReduction -> nextReduction Event.SingleStep Event.NextReductionShow -> do {- Using these statements we will highlight the rule that led to the current focusTerm. x@(steps, _, _) <- nextReduction case do {Rewrite.Rule r <- steps; return r} of -} {- Using these statements we will highlight the rule that will be tried next. -} x@(_, _, mst) <- nextReduction case do {st <- maybeToList mst; Rewrite.AttemptRule r <- fst $ splitAtReduction $ fst st; return r} of (f : _) -> lift $ writeUpdate $ SelectPage (Module.nameFromIdentifier f) (Just $ Term.range f) _ -> return () return x _ -> do (msgs, nt) <- forceHead return (mapMaybe (\msg -> case msg of Rewrite.Source step -> Just step _ -> Nothing) msgs, TermFocus.fromTerm nt, Nothing) liftM (flip (,) focusedTerm) $ case mst of Nothing -> do let s = TermFocus.subTerm focusedTerm Exc.assertT (Term.termRange s, "term size exceeds limit " ++ show (Option.maxTermSize limits)) (null $ drop (Option.maxTermSize limits) $ Term.subterms s) Exc.assertT (Term.termRange s, "term depth exceeds limit " ++ show (Option.maxTermDepth limits)) (null $ drop (Option.maxTermDepth limits) $ Term.breadths s) lift $ writeUpdate $ ReductionSteps steps case Term.viewNode s of Just (":", [x, xs]) -> do liftSTM $ putTMVar term $ stateFromTerm xs return (Just x) Just ("[]", []) -> do lift $ writeUpdate $ uncurry CurrentTerm $ TermFocus.format $ TermFocus.fromTerm s Exc.throwT (Term.termRange s, "finished.") _ -> do lift $ writeUpdate $ uncurry CurrentTerm $ TermFocus.format $ TermFocus.fromTerm s Exc.throwT (Term.termRange s, "I do not know how to handle this term: " ++ show s) Just (msgs, nt) -> do lift $ writeUpdate $ ReductionSteps steps liftSTM $ putTMVar term $ State (Just msgs) nt return Nothing splitAtReduction :: [ Rewrite.Message ] -> ( [ Rewrite.Source ] , Maybe ( TermFocus , [ Rewrite.Message ] ) ) splitAtReduction [] = ( [], Nothing ) splitAtReduction (Rewrite.Term t : ms) = ( [], Just (t, ms ) ) splitAtReduction (Rewrite.Source s : ms) = mapFst (s:) $ splitAtReduction ms voidStateT :: (Monad m) => (s -> m s) -> MS.StateT s m () voidStateT f = MS.StateT $ liftM ((,) ()) . f writeUpdate :: (Monad m) => GuiUpdate -> MW.WriterT [GuiUpdate] m () writeUpdate update = MW.tell [update] -- | following code taken from http://snipplr.com/view/17538/ myEventId :: Int myEventId = wxID_HIGHEST+100 -- the custom event ID, avoid clash with Graphics.UI.WXCore.Types.varTopId -- | the custom event is registered as a menu event createMyEvent :: IO (WXCore.CommandEvent ()) createMyEvent = WXCAL.commandEventCreate WXCMZ.wxEVT_COMMAND_MENU_SELECTED myEventId registerMyEvent :: WXCore.EvtHandler a -> IO () -> IO () registerMyEvent win io = WXEvent.evtHandlerOnMenuCommand win myEventId io {- | The machine writes to this channel (a textual representation of "current expression") but sometimes the GUI also controls itself. -} forEvent :: TChan.Out a -> WX.Frame f -> (a -> IO ()) -> IO () forEvent chan f act = do (inC,out) <- Chan.new void $ forkIO $ forever $ do Chan.write inC =<< STM.atomically (TChan.read chan) WXCAL.evtHandlerAddPendingEvent f =<< createMyEvent registerMyEvent f $ Chan.read out >>= act {- The order of widget creation is important for cycling through widgets using tabulator key. -} gui :: Chan.In Action -- ^ the gui writes here -- (if the program text changes due to an edit action) -> TChan.In GuiUpdate -> (WX.Frame () -> (GuiUpdate -> IO ()) -> IO ()) -> IO () gui input output procEvent = do panels <- newIORef M.empty frameError <- newFrameError frameControls <- WX.frame [ text := "controls" ] f <- WX.frame [ text := "live-sequencer", visible := False ] p <- WX.panel f [ ] fileMenu <- WX.menuPane [text := "&File"] let haskellFilenames = [ ("Haskell modules", ["*.hs"]), ("All files", ["*"]) ] loadItem <- WX.menuItem fileMenu [ text := "L&oad and check program ...\tCtrl-O", help := "flush all modules " ++ "and load a new program with all its dependencies" ] reloadItem <- WX.menuItem fileMenu [ text := "&Reload module", help := "reload a module from its original file, " ++ "but do not pass it to the interpreter" ] saveItem <- WX.menuItem fileMenu [ text := "&Save module\tCtrl-S", help := "overwrite original file with current module content" ] saveAsItem <- WX.menuItem fileMenu [ text := "Save module &as ...", help := "save module content to a different or new file " ++ "and make this the new file target" ] WX.menuLine fileMenu newModuleItem <- WX.menuItem fileMenu [ text := "&New module\tCtrl-Shift-M", help := "add a new empty module" ] closeModuleItem <- WX.menuItem fileMenu [ text := "&Close module\tCtrl-W", help := "close the active module" ] flushModulesItem <- WX.menuItem fileMenu [ text := "&Flush modules", help := "close all modules that are not transitively imported by the active module" ] WX.menuLine fileMenu quitItem <- WX.menuQuit fileMenu [] execMenu <- WX.menuPane [text := "&Execution"] refreshItem <- WX.menuItem execMenu [ text := "&Refresh\tCtrl-R", help := "parse the edited module and if successful " ++ "rename the page to the modified module name, " ++ "load new imported modules and " ++ "replace the executed program" ] WX.menuLine execMenu realTimeItem <- WX.menuItem execMenu [ text := "Real time\tCtrl-1", checkable := True, checked := True, help := "pause according to Wait elements" ] slowMotionItem <- WX.menuItem execMenu [ text := "Slow motion\tCtrl-2", checkable := True, help := "pause between every list element" ] singleStepItem <- WX.menuItem execMenu [ text := "Single step\tCtrl-3", checkable := True, help := "wait for user confirmation after every list element" ] WX.menuLine execMenu _restartItem <- WX.menuItem execMenu [ text := "Res&tart\tCtrl-T", on command := Chan.write input (Execution Restart), help := "stop sound and restart program execution with 'main'" ] playTermItem <- WX.menuItem execMenu [ text := "Play term\tCtrl-M", help := "stop sound and restart program execution " ++ "with the marked editor area as current term, " ++ "or use the surrounding identifier if nothing is marked" ] applyTermItem <- WX.menuItem execMenu [ text := "Apply term\tCtrl-Y", help := "apply marked expression as function to the current term, " ++ "the execution mode remains the same, " ++ "example terms: (merge track) or (flip append track)" ] _stopItem <- WX.menuItem execMenu [ text := "Stop\tCtrl-Space", on command := Chan.write input (Execution Stop), help := "stop program execution and sound, " ++ "reset term to 'main'" ] WX.menuLine execMenu fasterItem <- WX.menuItem execMenu [ text := "Faster\tCtrl->", enabled := False, help := "decrease pause in slow motion mode" ] slowerItem <- WX.menuItem execMenu [ text := "Slower\tCtrl-<", enabled := False, help := "increase pause in slow motion mode" ] nextElemItem <- WX.menuItem execMenu [ text := "Next element\tCtrl-N", enabled := False, on command := Chan.write input (Execution $ NextStep Event.NextElement), help := "compute next list element in single step mode" ] nextRedItem <- WX.menuItem execMenu [ text := "Next reduction\tCtrl-Shift-N", enabled := False, on command := Chan.write input (Execution $ NextStep Event.NextReduction), help := "compute next reduction in single step mode" ] nextShowItem <- WX.menuItem execMenu [ text := "Next reduction and highlight rule\tCtrl-U", enabled := False, on command := Chan.write input (Execution $ NextStep Event.NextReductionShow), help := "compute next reduction in single step mode " ++ "and highlight currently processed rule" ] windowMenu <- WX.menuPane [text := "&Window"] appRunning <- newIORef True let windowMenuItem title win = do itm <- WX.menuItem windowMenu [ text := title, help := "show or hide " ++ title ++ " window", checkable := True, checked := True ] set itm [ on command := do b <- get itm checked set win [ visible := b ] ] set win [ on closing := do run <- readIORef appRunning if run then do set itm [ checked := False ] set win [ visible := False ] -- WXCMZ.closeEventVeto ??? True else WXEvent.propagateEvent ] windowMenuItem "errors" $ errorFrame frameError windowMenuItem "controls" frameControls WX.menuLine windowMenu reducerVisibleItem <- WX.menuItem windowMenu [ text := "current term", checkable := True, checked := True, help := "show or hide current term - " ++ "hiding may improve performance drastically" ] splitter <- WX.splitterWindow p [] nb <- WX.notebook splitter [ ] reducer <- textCtrlMono splitter [ editable := False ] status <- WX.statusField [ text := "Welcome to interactive music composition with Haskell" ] let handleException moduleName act = do result <- try act case result of Left err -> TChan.writeIO output $ Exception $ Module.inoutExceptionMsg moduleName $ Err.ioeGetErrorString err Right () -> return () set loadItem [ on command := do mfilename <- WX.fileOpenDialog f False {- change current directory -} True "Load Haskell program" haskellFilenames "" "" forM_ mfilename $ Chan.write input . Modification . Load ] set reloadItem [ on command := do (moduleName, pnl) <- getFromNotebook nb =<< readIORef panels let path = sourceLocation pnl handleException moduleName $ do content <- readFile path set (editor pnl) [ text := content ] set status [ text := Module.tellName moduleName ++ " reloaded from " ++ path ] ] let getCurrentModule = do (moduleName, pnl) <- getFromNotebook nb =<< readIORef panels content <- get (editor pnl) text return (sourceLocation pnl, moduleName, content) saveModule (path, moduleName, content) = handleException moduleName $ do -- Log.put path writeFile path content set status [ text := Module.tellName moduleName ++ " saved to " ++ path ] set saveItem [ on command := do saveModule =<< getCurrentModule ] set saveAsItem [ on command := do (filePath, moduleName, content) <- getCurrentModule let (path,file) = FilePath.splitFileName filePath -- print (path,file) mfilename <- WX.fileSaveDialog f False {- change current directory -} True ("Save " ++ Module.tellName moduleName) haskellFilenames path file forM_ mfilename $ \fileName -> do saveModule (fileName, moduleName, content) modifyIORef panels $ M.adjust (\pnl -> pnl { sourceLocation = fileName }) moduleName ] set newModuleItem [ on command := Chan.write input $ Modification NewModule ] set closeModuleItem [ on command := Chan.write input . Modification . CloseModule . fst =<< getFromNotebook nb =<< readIORef panels ] set flushModulesItem [ on command := Chan.write input . Modification . FlushModules . fst =<< getFromNotebook nb =<< readIORef panels ] let refreshProgram (moduleName, pnl) = do s <- get (editor pnl) text pos <- get (editor pnl) cursor Chan.write input $ Modification $ RefreshModule Nothing moduleName s pos updateErrorLog frameError $ Seq.filter $ \(Exception.Message _ errorRng _) -> Module.deconsName moduleName /= Pos.sourceName (Term.start errorRng) set refreshItem [ on command := do refreshProgram =<< getFromNotebook nb =<< readIORef panels -- mapM_ refreshProgram pnls ] set playTermItem [ on command := Chan.write input . Execution . PlayTerm =<< uncurry getMarkedExpr . mapSnd editor =<< getFromNotebook nb =<< readIORef panels ] set applyTermItem [ on command := Chan.write input . Execution . ApplyTerm =<< uncurry getMarkedExpr . mapSnd editor =<< getFromNotebook nb =<< readIORef panels ] waitDuration <- newIORef $ Time.milliseconds 500 let updateSlowMotionDur = do dur <- readIORef waitDuration Chan.write input $ Execution $ Mode $ Event.SlowMotion dur slowmoUnit = Time.milliseconds 100 set fasterItem [ on command := do modifyIORef waitDuration $ \d -> max slowmoUnit (Time.sub d slowmoUnit) updateSlowMotionDur d <- readIORef waitDuration set status [ text := "decreased pause to " ++ Time.format d ] ] set slowerItem [ on command := do modifyIORef waitDuration $ Mn.mappend slowmoUnit updateSlowMotionDur d <- readIORef waitDuration set status [ text := "increased pause to " ++ Time.format d ] ] let setRealTime b = do set realTimeItem [ checked := b ] setSlowMotion b = do set slowMotionItem [ checked := b ] set fasterItem [ enabled := b ] set slowerItem [ enabled := b ] setSingleStep b = do set singleStepItem [ checked := b ] set nextElemItem [ enabled := b ] set nextRedItem [ enabled := b ] set nextShowItem [ enabled := b ] onActivation w act = set w [ on command := do b <- get w checked if b then act else set w [checked := True] ] activateRealTime = do setRealTime True setSlowMotion False setSingleStep False activateSlowMotion = do setRealTime False setSlowMotion True setSingleStep False activateSingleStep = do setRealTime False setSlowMotion False setSingleStep True onActivation realTimeItem $ do activateRealTime Chan.write input $ Execution $ Mode Event.RealTime onActivation slowMotionItem $ do activateSlowMotion updateSlowMotionDur onActivation singleStepItem $ do activateSingleStep Chan.write input $ Execution $ Mode Event.singleStep splitterWindowSetSashGravity splitter 0.5 let initSplitterPosition = 0 {- equal division of heights -} newIORef initSplitterPosition >>= \splitterPosition -> set reducerVisibleItem [ on command := do b <- get reducerVisibleItem checked isSplit <- WXCMZ.splitterWindowIsSplit splitter when (b /= isSplit) $ void $ if b then WXCMZ.splitterWindowSplitHorizontally splitter nb reducer =<< readIORef splitterPosition else do writeIORef splitterPosition =<< WXCMZ.splitterWindowGetSashPosition splitter WXCMZ.splitterWindowUnsplit splitter reducer ] {- Without this dummy page the notebook sometimes gets a very small height, although we explicitly set the splitter position to 0 (= balanced tiling). However the imbalance is not reproducable. Maybe this is a race condition. -} do pnl <- displayModule nb (Module.empty $ Module.Name "Dummy") void $ WXCMZ.notebookAddPage nb (panel pnl) "Dummy" True (-1) set f [ layout := container p $ margin 5 $ WX.fill $ WX.hsplit splitter 5 {- sash width -} initSplitterPosition (widget nb) (widget reducer) , WX.statusBar := [status] , WX.menuBar := [fileMenu, execMenu, windowMenu] , visible := True , clientSize := sz 1280 720 ] onErrorSelection frameError $ \(Exception.Message typ errorRng _descr) -> do let moduleIdent = Module.Name $ Pos.sourceName $ Term.start errorRng pnls <- readIORef panels forM_ (liftM2 (,) (M.lookupIndex moduleIdent pnls) (M.lookup moduleIdent pnls)) $ \ (i,pnl) -> do set nb [ notebookSelection := i ] case typ of Exception.Parse -> flip markText errorRng $ editor pnl Exception.Term -> flip markText errorRng $ highlighter pnl Exception.InOut -> return () let closeOther = writeIORef appRunning False >> close (errorFrame frameError) >> close frameControls set quitItem [ on command := closeOther >> close f] set f [ on closing := closeOther >> WXEvent.propagateEvent {- 'close f' would trigger the closing handler again -} ] focusOn f highlights <- varCreate M.empty procEvent f $ \msg -> case msg of CurrentTerm rng sr -> get reducerVisibleItem checked >>= flip when ( set reducer [ text := sr, cursor := 0 ] >> setColorCurrentTerm reducer ( rgb 200 100 (0::Int) ) rng ) ReductionSteps steps -> do hls <- fmap (fmap highlighter) $ readIORef panels visibleModule <- fmap fst $ getFromNotebook nb hls let highlight :: Int -> Int -> Int -> [Identifier] -> IO () highlight r g b idents = do let m = M.fromListWith (++) $ filter ((visibleModule==) . fst) $ map (\ident -> (Module.nameFromIdentifier ident, [ident])) idents void $ varUpdate highlights $ M.unionWith (++) $ m setColor hls ( rgb r g b ) m let prep step = case step of Rewrite.Step target -> Just (AccTuple.first3, (target:)) Rewrite.Rule rule -> Just (AccTuple.second3, (rule:)) Rewrite.Data origin -> Just (AccTuple.third3, (origin:)) Rewrite.AttemptRule _ -> Nothing (targets, rules, origins) = foldr (uncurry Acc.modify) ([],[],[]) $ mapMaybe prep steps highlight 0 200 200 targets highlight 200 0 200 rules highlight 200 200 0 origins ResetDisplay -> do hls <- fmap (fmap highlighter) $ readIORef panels setColor hls WXCore.white =<< varSwap highlights M.empty Exception exc -> do addToErrorLog frameError exc set status [ text := Exception.statusFromMessage exc ] -- update highlighter text field only if parsing was successful Refresh moduleName s pos -> do pnls <- readIORef panels Fold.mapM_ (\pnl -> set (highlighter pnl) [ text := s, cursor := pos ]) (M.lookup moduleName pnls) set status [ text := Module.tellName moduleName ++ " reloaded into interpreter" ] InsertText str -> do pnl <- fmap snd $ getFromNotebook nb =<< readIORef panels WXCMZ.textCtrlWriteText (editor pnl) str set status [ text := "inserted note from external controller" ] StatusLine str -> do set status [ text := str ] Register mainModName mods -> do void $ WXCMZ.notebookDeleteAllPages nb (writeIORef panels =<<) $ forM mods $ \modu -> do pnl <- displayModule nb modu void $ WXCMZ.notebookAddPage nb (panel pnl) (Module.deconsName $ Module.name modu) (Module.name modu == mainModName) (-1) return pnl updateErrorLog frameError (const Seq.empty) set status [ text := "modules loaded: " ++ formatModuleList ( M.keys mods ) ] SelectPage modName mrng -> do pnls <- readIORef panels forM_ (liftM2 (,) (M.lookupIndex modName pnls) (M.lookup modName pnls)) $ \ (i,pnl) -> do set nb [ notebookSelection := i ] Fold.mapM_ ( markText ( highlighter pnl ) ) mrng InsertPage act modu -> do pnls <- readIORef panels pnl <- displayModule nb modu let modName = Module.name modu newPnls = M.insert modName pnl pnls writeIORef panels newPnls success <- WXCMZ.notebookInsertPage nb (M.findIndex modName newPnls) (panel pnl) (Module.deconsName modName) act (-1) {- FIXME: if the page cannot be added, we get an inconsistency - how to solve that? -} if success then set status [ text := "new " ++ Module.tellName modName ] else TChan.writeIO output $ Exception $ Module.inoutExceptionMsg modName $ "Panic: cannot add page for the module" DeletePage modName -> do pnls <- readIORef panels forM_ ( M.lookupIndex modName pnls ) $ WXCMZ.notebookDeletePage nb writeIORef panels $ M.delete modName pnls set status [ text := "closed " ++ Module.tellName modName ] RenamePage fromName toName -> do pnls <- readIORef panels forM_ ( liftM2 (,) ( M.lookupIndex fromName pnls ) ( M.lookup fromName pnls ) ) $ \(i,pnl) -> do success <- WXCMZ.notebookRemovePage nb i when (not success) $ TChan.writeIO output $ Exception $ Module.inoutExceptionMsg fromName $ "Panic: cannot remove page for renaming module" let newPnls = M.insert toName pnl $ M.delete fromName pnls writeIORef panels newPnls forM_ ( M.lookupIndex toName newPnls ) $ \j -> WXCMZ.notebookInsertPage nb j (panel pnl) (Module.deconsName toName) True (-1) set status [ text := "renamed " ++ Module.tellName fromName ++ " to " ++ Module.tellName toName ] RebuildControls ctrls -> Controls.create frameControls ctrls $ Chan.write input . Control Running mode -> do case mode of Event.RealTime -> do set status [ text := "interpreter in real-time mode" ] activateRealTime Event.SlowMotion dur -> do set status [ text := ("interpreter in slow-motion mode with pause " ++ Time.format dur) ] activateSlowMotion Event.SingleStep _ -> do set status [ text := "interpreter in single step mode," ++ " waiting for next step" ] activateSingleStep HTTP request -> do pnls <- readIORef panels HTTPGui.update (\contentMVar name newContent pos -> Chan.write input $ Modification $ RefreshModule (Just contentMVar) name newContent pos) status (fmap editor pnls) request data FrameError = FrameError { errorFrame :: WX.Frame (), errorLog :: WX.ListCtrl (), errorText :: WX.TextCtrl (), errorList :: IORef (Seq.Seq Exception.Message) } newFrameError :: IO FrameError newFrameError = do frame <- WX.frame [ text := "errors" ] pnl <- WX.panel frame [ ] splitter <- WX.splitterWindow pnl [ ] splitterWindowSetSashGravity splitter 1 log <- WX.listCtrl splitter [ columns := ("Module", AlignLeft, 120) : ("Row", AlignRight, -1) : ("Column", AlignRight, -1) : ("Type", AlignLeft, -1) : ("Description", AlignLeft, 500) : [] ] list <- newIORef Seq.empty txt <- textCtrlMono splitter [ editable := False ] let rec = FrameError { errorFrame = frame, errorLog = log, errorText = txt, errorList = list } clearLog <- WX.button pnl [ text := "Clear", on command := do updateErrorLog rec (const Seq.empty) set txt [ text := "" ] ] set frame [ layout := container pnl $ margin 5 $ WX.column 5 $ [ WX.fill $ WX.hsplit splitter 5 0 (widget log) (widget txt), WX.hfloatLeft $ widget clearLog ] , clientSize := sz 500 300 ] return rec onErrorSelection :: FrameError -> (Exception.Message -> IO ()) -> IO () onErrorSelection r act = set (errorLog r) [ on listEvent := \ev -> case ev of WXEvent.ListItemSelected n -> do errors <- readIORef (errorList r) let msg@(Exception.Message _typ _errorRng descr) = Seq.index errors n set (errorText r) [ text := descr ] act msg _ -> return () ] updateErrorLog :: FrameError -> (Seq.Seq Exception.Message -> Seq.Seq Exception.Message) -> IO () updateErrorLog r f = do errors <- readIORef (errorList r) let newErrors = f errors writeIORef (errorList r) newErrors set (errorLog r) [ items := map Exception.lineFromMessage $ Fold.toList newErrors ] addToErrorLog :: FrameError -> Exception.Message -> IO () addToErrorLog r exc = do itemAppend (errorLog r) $ Exception.lineFromMessage exc modifyIORef (errorList r) (Seq.|> exc) markText :: TextCtrl a -> Term.Range -> IO () markText textCtrl rng = do (i,j) <- textRangeFromRange textCtrl rng set textCtrl [ cursor := i ] WXCMZ.textCtrlSetSelection textCtrl i j data Panel = Panel { panel :: WX.SplitterWindow (), editor, highlighter :: WX.TextCtrl (), sourceLocation :: FilePath } displayModule :: WXCore.Window b -> Module.Module -> IO Panel displayModule nb modu = do psub <- WX.splitterWindow nb [] splitterWindowSetSashGravity psub 0.5 ed <- textCtrlMono psub [] hl <- textCtrlRichMono psub [ editable := False ] set ed [ text := Module.sourceText modu ] set hl [ text := Module.sourceText modu ] void $ WXCMZ.splitterWindowSplitVertically psub ed hl 0 {- set psub [ layout := WX.vsplit psub 5 0 (WX.fill $ widget ed) (WX.fill $ widget hl) ] -} return $ Panel psub ed hl $ Module.sourceLocation modu textCtrlMono :: WXCore.Window a -> [Prop (TextCtrl ())] -> IO (TextCtrl ()) textCtrlMono parent prop = {- WX.textCtrlEx parent ( WXCore.wxTE_MULTILINE WXCore..+. WXCore.wxTE_RICH ) $ -} WX.textCtrl parent $ ( font := fontFixed ) : ( wrap := WrapNone ) : prop textCtrlRichMono :: WXCore.Window a -> [Prop (TextCtrl ())] -> IO (TextCtrl ()) textCtrlRichMono parent prop = {- WX.textCtrlEx parent ( WXCore.wxTE_MULTILINE WXCore..+. WXCore.wxTE_RICH2 ) $ -} WX.textCtrlRich parent $ ( font := fontFixed ) : ( wrap := WrapNone ) : prop getFromNotebook :: Notebook b -> M.Map Module.Name a -> IO (Module.Name, a) getFromNotebook nb m = fmap (flip M.elemAt m) $ get nb notebookSelection textPosFromSourcePos :: TextCtrl a -> Pos.SourcePos -> IO Int textPosFromSourcePos textArea pos = WXCMZ.textCtrlXYToPosition textArea $ Point (Pos.sourceColumn pos - 1) (Pos.sourceLine pos - 1) sourcePosFromTextColumnRow :: Module.Name -> (Int, Int) -> Pos.SourcePos sourcePosFromTextColumnRow (Module.Name name) (col, line) = Pos.newPos name (line+1) (col+1) textRangeFromRange :: TextCtrl a -> Term.Range -> IO (Int, Int) textRangeFromRange textArea rng = do from <- textPosFromSourcePos textArea $ Term.start rng to <- textPosFromSourcePos textArea $ Term.end rng return (from, to) textRangeFromSelection :: TextCtrl a -> IO (Int, Int) textRangeFromSelection textArea = alloca $ \fromPtr -> alloca $ \toPtr -> do void $ WXCMZ.textCtrlGetSelection textArea fromPtr toPtr liftM2 (,) (fmap fromIntegral $ peek (fromPtr :: Ptr C.CInt)) (fmap fromIntegral $ peek (toPtr :: Ptr C.CInt)) textColumnRowFromPos :: TextCtrl a -> Int -> IO (Int, Int) textColumnRowFromPos textArea pos = alloca $ \rowPtr -> alloca $ \columnPtr -> do void $ WXCMZ.textCtrlPositionToXY textArea pos columnPtr rowPtr liftM2 (,) (fmap fromIntegral $ peek columnPtr) (fmap fromIntegral $ peek rowPtr) setColor :: (Ord k) => M.Map k (TextCtrl a) -> Color -> M.Map k [Identifier] -> IO () setColor highlighters hicolor positions = do forM_ (M.intersectionWith (,) highlighters positions) $ \(hl, idents) -> do attr <- WXCMZ.textCtrlGetDefaultStyle hl bracket (WXCMZ.textAttrGetBackgroundColour attr) (WXCMZ.textAttrSetBackgroundColour attr) $ const $ do WXCMZ.textAttrSetBackgroundColour attr hicolor forM_ idents $ \ ident -> do (from, to) <- textRangeFromRange hl $ Term.range ident WXCMZ.textCtrlSetStyle hl from to attr setColorCurrentTerm :: TextCtrl a -> Color -> (Int, Int)-> IO () setColorCurrentTerm reducer hicolor (from, to) = do attr <- WXCMZ.textCtrlGetDefaultStyle reducer bracket (WXCMZ.textAttrGetBackgroundColour attr) (WXCMZ.textAttrSetBackgroundColour attr) $ const $ do WXCMZ.textAttrSetBackgroundColour attr hicolor void $ WXCMZ.textCtrlSetStyle reducer from to attr return () data MarkedText = MarkedText { _markedPosition :: Pos.SourcePos, markedString :: String } getMarkedExpr :: Module.Name -> TextCtrl () -> IO MarkedText getMarkedExpr modu ed = do marked <- WXCMZ.textCtrlGetStringSelection ed if null marked then do (i,line) <- textColumnRowFromPos ed =<< get ed cursor content <- WXCMZ.textCtrlGetLineText ed line {- simpler but inefficient content <- get ed text i <- get ed cursor -} case splitAt i content of (prefix,suffix) -> let identLetter c = Char.isAlphaNum c || c == '_' || c == '.' in return $ MarkedText (sourcePosFromTextColumnRow modu (i - length prefix, line)) ((reverse $ takeWhile identLetter $ reverse prefix) ++ takeWhile identLetter suffix) else do (from, _to) <- textRangeFromSelection ed pos <- textColumnRowFromPos ed from return $ MarkedText (sourcePosFromTextColumnRow modu pos) marked