, runSessionWithConfig
, Session
, SessionConfig(..)
- , MonadSessionConfig(..)
, SessionException(..)
, anySessionException
+ , withTimeout
-- * Sending
, sendRequest
- , sendNotification
+ , sendRequest_
, sendRequest'
+ , sendNotification
+ , sendRequestMessage
, sendNotification'
, sendResponse
-- * Receving
+ , message
, anyRequest
- , request
, anyResponse
- , response
, anyNotification
- , notification
+ , anyMessage
, loggingNotification
, publishDiagnosticsNotification
-- * Combinators
- , choice
- , option
- , optional
- , between
- , some
- , many
- , sepBy
- , sepBy1
- , sepEndBy1
- , sepEndBy
- , endBy1
- , endBy
- , count
- , manyTill
- , skipMany
- , skipSome
- , skipManyTill
- , skipSomeTill
- , (<|>)
, satisfy
-- * Utilities
, initializeResponse
+ -- ** Documents
, openDoc
, documentContents
, getDocumentEdit
, getDocUri
- , noDiagnostics
+ , getVersionedDoc
+ -- ** Symbols
, getDocumentSymbols
- , getDiagnostics
+ -- ** Diagnostics
+ , waitForDiagnostics
+ , waitForDiagnosticsSource
+ , noDiagnostics
+ -- ** Commands
+ , executeCommand
+ -- ** Code Actions
+ , getAllCodeActions
+ , executeCodeAction
+ -- ** Completions
+ , getCompletions
+ -- ** References
+ , getReferences
+ -- ** Edits
+ , applyEdit
) where
-import Control.Applicative
import Control.Applicative.Combinators
import Control.Concurrent
import Control.Monad
import qualified Data.Text as T
import qualified Data.Text.IO as T
import Data.Aeson
-import qualified Data.ByteString.Lazy.Char8 as B
import Data.Default
import qualified Data.HashMap.Strict as HashMap
import qualified Data.Map as Map
import Data.Maybe
-import Language.Haskell.LSP.Types hiding (id, capabilities)
+import Language.Haskell.LSP.Types hiding (id, capabilities, message)
import qualified Language.Haskell.LSP.Types as LSP
+import qualified Language.Haskell.LSP.Types.Capabilities as LSP
+import Language.Haskell.LSP.Messages
import Language.Haskell.LSP.VFS
import Language.Haskell.LSP.Test.Compat
import Language.Haskell.LSP.Test.Decoding
runSessionWithHandles serverIn serverOut listenServer config rootDir $ do
-- Wrap the session around initialize and shutdown calls
- sendRequest Initialize initializeParams
- initRspMsg <- response :: Session InitializeResponse
+ initRspMsg <- sendRequest Initialize initializeParams :: Session InitializeResponse
liftIO $ maybe (return ()) (putStrLn . ("Error while initializing: " ++) . show ) (initRspMsg ^. LSP.error)
sendNotification Exit ExitParams
return result
-
+ where
-- | Listens to the server output, makes sure it matches the record and
-- signals any semaphores
-listenServer :: Handle -> Session ()
-listenServer serverOut = do
- msgBytes <- liftIO $ getNextMessage serverOut
+ listenServer :: Handle -> SessionContext -> IO ()
+ listenServer serverOut context = do
+ msgBytes <- getNextMessage serverOut
- context <- ask
- reqMap <- liftIO $ readMVar $ requestMap context
+ reqMap <- readMVar $ requestMap context
let msg = decodeFromServerMsg reqMap msgBytes
- liftIO $ writeChan (messageChan context) msg
+ writeChan (messageChan context) (ServerMessage msg)
- listenServer serverOut
+ listenServer serverOut context
-- | The current text contents of a document.
documentContents :: TextDocumentIdentifier -> Session T.Text
-- and returns the new content
getDocumentEdit :: TextDocumentIdentifier -> Session T.Text
getDocumentEdit doc = do
- req <- request :: Session ApplyWorkspaceEditRequest
+ req <- message :: Session ApplyWorkspaceEditRequest
unless (checkDocumentChanges req || checkChanges req) $
- liftIO $ throw (IncorrectApplyEditRequestException (show req))
+ liftIO $ throw (IncorrectApplyEditRequest (show req))
documentContents doc
where
let mMap = req ^. params . edit . changes
in maybe False (HashMap.member (doc ^. uri)) mMap
--- | Sends a request to the server.
---
+-- | Sends a request to the server and waits for its response.
-- @
--- sendRequest (Proxy :: Proxy DocumentSymbolRequest)
--- TextDocumentDocumentSymbol
--- (DocumentSymbolParams docId)
+-- rsp <- sendRequest TextDocumentDocumentSymbol params :: Session DocumentSymbolsResponse
-- @
-sendRequest
- :: (ToJSON params)
- => --Proxy (RequestMessage ClientMethod params resp) -- ^ A proxy to provide more type information about the request.
- ClientMethod -- ^ The request method.
+-- Note: will skip any messages in between the request and the response.
+sendRequest :: (ToJSON params, FromJSON a) => ClientMethod -> params -> Session (ResponseMessage a)
+sendRequest m = sendRequest' m >=> skipManyTill anyMessage . responseForId
+
+-- | Send a request to the server and wait for its response,
+-- but discard it.
+sendRequest_ :: ToJSON params => ClientMethod -> params -> Session ()
+sendRequest_ p = void . (sendRequest p :: ToJSON params => params -> Session (ResponseMessage Value))
+
+-- | Sends a request to the server without waiting on the response.
+sendRequest'
+ :: ToJSON params
+ => ClientMethod -- ^ The request method.
-> params -- ^ The request parameters.
-> Session LspId -- ^ The id of the request that was sent.
-sendRequest method params = do
+sendRequest' method params = do
id <- curReqId <$> get
modify $ \c -> c { curReqId = nextId id }
object ["jsonrpc" .= rpc, "id" .= id, "method" .= method, "params" .= params]
-sendRequest' :: (ToJSON a, ToJSON b) => RequestMessage ClientMethod a b -> Session ()
-sendRequest' req = do
+sendRequestMessage :: (ToJSON a, ToJSON b) => RequestMessage ClientMethod a b -> Session ()
+sendRequestMessage req = do
-- Update the request map
reqMap <- requestMap <$> ask
liftIO $ modifyMVar_ reqMap $
sendResponse :: ToJSON a => ResponseMessage a -> Session ()
sendResponse = sendMessage
-sendMessage :: ToJSON a => a -> Session ()
-sendMessage msg = do
- h <- serverIn <$> ask
- liftIO $ B.hPut h $ addHeader (encode msg)
-
-- | Returns the initialize response that was received from the server.
-- The initialize requests and responses are not included the session,
-- so if you need to test it use this.
let fp = rootDir context </> file
return $ filePathToUri fp
-getDiagnostics :: Session [Diagnostic]
-getDiagnostics = do
- diagsNot <- notification :: Session PublishDiagnosticsNotification
+-- | Waits for diagnostics to be published and returns them.
+waitForDiagnostics :: Session [Diagnostic]
+waitForDiagnostics = do
+ diagsNot <- skipManyTill anyMessage message :: Session PublishDiagnosticsNotification
let (List diags) = diagsNot ^. params . LSP.diagnostics
return diags
+waitForDiagnosticsSource :: String -> Session [Diagnostic]
+waitForDiagnosticsSource src = do
+ diags <- waitForDiagnostics
+ let res = filter matches diags
+ if null res
+ then waitForDiagnosticsSource src
+ else return res
+ where
+ matches :: Diagnostic -> Bool
+ matches d = d ^. source == Just (T.pack src)
+
-- | Expects a 'PublishDiagnosticsNotification' and throws an
-- 'UnexpectedDiagnosticsException' if there are any diagnostics
-- returned.
noDiagnostics :: Session ()
noDiagnostics = do
- diagsNot <- notification :: Session PublishDiagnosticsNotification
- when (diagsNot ^. params . LSP.diagnostics /= List []) $ liftIO $ throw UnexpectedDiagnosticsException
+ diagsNot <- message :: Session PublishDiagnosticsNotification
+ when (diagsNot ^. params . LSP.diagnostics /= List []) $ liftIO $ throw UnexpectedDiagnostics
-- | Returns the symbols in a document.
-getDocumentSymbols :: TextDocumentIdentifier -> Session DocumentSymbolsResponse
+getDocumentSymbols :: TextDocumentIdentifier -> Session [SymbolInformation]
getDocumentSymbols doc = do
- sendRequest TextDocumentDocumentSymbol (DocumentSymbolParams doc)
- response
\ No newline at end of file
+ ResponseMessage _ rspLid mRes mErr <- sendRequest TextDocumentDocumentSymbol (DocumentSymbolParams doc)
+ maybe (return ()) (throw . UnexpectedResponseError rspLid) mErr
+ let (Just (List symbols)) = mRes
+ return symbols
+
+-- | Returns all the code actions in a document by
+-- querying the code actions at each of the current
+-- diagnostics' positions.
+getAllCodeActions :: TextDocumentIdentifier -> Session [CommandOrCodeAction]
+getAllCodeActions doc = do
+ curDiags <- fromMaybe [] . Map.lookup (doc ^. uri) . curDiagnostics <$> get
+ let ctx = CodeActionContext (List curDiags) Nothing
+
+ foldM (go ctx) [] curDiags
+
+ where
+ go :: CodeActionContext -> [CommandOrCodeAction] -> Diagnostic -> Session [CommandOrCodeAction]
+ go ctx acc diag = do
+ ResponseMessage _ rspLid mRes mErr <- sendRequest TextDocumentCodeAction (CodeActionParams doc (diag ^. range) ctx)
+
+ case mErr of
+ Just e -> throw (UnexpectedResponseError rspLid e)
+ Nothing ->
+ let Just (List cmdOrCAs) = mRes
+ in return (acc ++ cmdOrCAs)
+
+-- | Executes a command.
+executeCommand :: Command -> Session ()
+executeCommand cmd = do
+ let args = decode $ encode $ fromJust $ cmd ^. arguments
+ execParams = ExecuteCommandParams (cmd ^. command) args
+ sendRequest_ WorkspaceExecuteCommand execParams
+
+-- | Executes a code action.
+-- Matching with the specification, if a code action
+-- contains both an edit and a command, the edit will
+-- be applied first.
+executeCodeAction :: CodeAction -> Session ()
+executeCodeAction action = do
+ maybe (return ()) handleEdit $ action ^. edit
+ maybe (return ()) executeCommand $ action ^. command
+
+ where handleEdit :: WorkspaceEdit -> Session ()
+ handleEdit e =
+ -- Its ok to pass in dummy parameters here as they aren't used
+ let req = RequestMessage "" (IdInt 0) WorkspaceApplyEdit (ApplyWorkspaceEditParams e)
+ in updateState (ReqApplyWorkspaceEdit req)
+
+-- | Adds the current version to the document, as tracked by the session.
+getVersionedDoc :: TextDocumentIdentifier -> Session VersionedTextDocumentIdentifier
+getVersionedDoc (TextDocumentIdentifier uri) = do
+ fs <- vfs <$> get
+ let ver =
+ case fs Map.!? uri of
+ Just (VirtualFile v _) -> Just v
+ _ -> Nothing
+ return (VersionedTextDocumentIdentifier uri ver)
+
+-- | Applys an edit to the document and returns the updated document version.
+applyEdit :: TextDocumentIdentifier -> TextEdit -> Session VersionedTextDocumentIdentifier
+applyEdit doc edit = do
+
+ verDoc <- getVersionedDoc doc
+
+ caps <- asks (capabilities . config)
+
+ let supportsDocChanges = fromMaybe False $ do
+ let LSP.ClientCapabilities mWorkspace _ _ = caps
+ LSP.WorkspaceClientCapabilities _ mEdit _ _ _ _ <- mWorkspace
+ LSP.WorkspaceEditClientCapabilities mDocChanges <- mEdit
+ mDocChanges
+
+ let wEdit = if supportsDocChanges
+ then
+ let docEdit = TextDocumentEdit verDoc (List [edit])
+ in WorkspaceEdit Nothing (Just (List [docEdit]))
+ else
+ let changes = HashMap.singleton (doc ^. uri) (List [edit])
+ in WorkspaceEdit (Just changes) Nothing
+
+ let req = RequestMessage "" (IdInt 0) WorkspaceApplyEdit (ApplyWorkspaceEditParams wEdit)
+ updateState (ReqApplyWorkspaceEdit req)
+
+ -- version may have changed
+ getVersionedDoc doc
+
+-- | Returns the completions for the position in the document.
+getCompletions :: TextDocumentIdentifier -> Position -> Session [CompletionItem]
+getCompletions doc pos = do
+ rsp <- sendRequest TextDocumentCompletion (TextDocumentPositionParams doc pos)
+
+ let exc = throw $ UnexpectedResponseError (rsp ^. LSP.id)
+ (fromJust $ rsp ^. LSP.error)
+ res = fromMaybe exc (rsp ^. result)
+ case res of
+ Completions (List items) -> return items
+ CompletionList (CompletionListType _ (List items)) -> return items
+
+getReferences :: TextDocumentIdentifier -> Position -> Bool -> Session [Location]
+getReferences doc pos inclDecl =
+ let ctx = ReferenceContext inclDecl
+ params = ReferenceParams doc pos ctx
+ in fromMaybe [] . (^. result) <$> sendRequest TextDocumentReferences params