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|
structure C = Compiler
structure Lsp :> LSP = struct
val debug = LspSpec.debug
structure SK = struct
type ord_key = string
val compare = String.compare
end
structure SM = BinaryMapFn(SK)
type fileState =
{ envBeforeThisModule: ElabEnv.env
, decls: Elab.decl list
, text: string}
type state =
{ urpPath : string
, fileStates : fileState SM.map
}
val stateRef = ref (NONE: state option)
fun insertFileState (state: state) (fileName: string) (fs: fileState) =
stateRef := SOME { urpPath = #urpPath state
, fileStates = SM.insert ( #fileStates state
, fileName
, fs)
}
fun scanDir (f: string -> bool) (path: string) =
let
val dir = OS.FileSys.openDir path
fun doScanDir acc =
case OS.FileSys.readDir dir of
NONE => (OS.FileSys.closeDir dir; acc)
| SOME fname =>
(if f fname
then doScanDir (fname :: acc)
else doScanDir acc)
in
doScanDir []
end
(* Throws Fail if can't init *)
fun initState (initParams: LspSpec.initializeParams): state =
let
val rootPath = case #rootUri initParams of
NONE => raise Fail "No rootdir found"
| SOME a => #path a
val optsUrpFile =
(SOME (FromJson.asString (FromJson.get "urpfile" (FromJson.get "project" (FromJson.get "urweb" (#initializationOptions initParams))))))
handle ex => NONE
val foundUrps = scanDir (fn fname => OS.Path.ext fname = SOME "urp") rootPath
in
{ urpPath = case foundUrps of
[] => raise Fail ("No .urp files found in path " ^ rootPath)
| one :: [] => OS.Path.base (OS.Path.file one)
| many => case List.find (fn m => SOME (OS.Path.base (OS.Path.file m)) = optsUrpFile) many of
NONE => raise Fail ("Found multiple .urp files in path " ^ rootPath)
| SOME f => OS.Path.base (OS.Path.file f)
, fileStates = SM.empty
}
end
fun addSgnToEnv (env: ElabEnv.env) (sgn: Source.sgn_item list) (fileName: string) (addUnprefixed: bool): ElabEnv.env =
let
val moduleName = C.moduleOf fileName
val (sgn, gs) = Elaborate.elabSgn (env, Disjoint.empty) (Source.SgnConst sgn, { file = fileName
, first = ErrorMsg.dummyPos
, last = ErrorMsg.dummyPos })
val () = case gs of
[] => ()
| _ => (app (fn (_, env, _, c1, c2) =>
Print.prefaces "Unresolved"
[("c1", ElabPrint.p_con env c1),
("c2", ElabPrint.p_con env c2)]) gs;
raise Fail ("Unresolved disjointness constraints in " ^ moduleName ^ " at " ^ fileName)) (* TODO Not sure if this is needed for all signatures or only for Basis *)
val (env', n) = ElabEnv.pushStrNamed env moduleName sgn
val (_, env') = if addUnprefixed
then Elaborate.dopen env' {str = n, strs = [], sgn = sgn}
else ([], env')
in
env'
end
fun errorToDiagnostic (err: { span: ErrorMsg.span , message: string }): LspSpec.diagnostic =
{ range = { start = { line = #line (#first (#span err)) - 1
, character = #char (#first (#span err))
}
, end_ = { line = #line (#last (#span err)) - 1
, character = #char (#last (#span err))
}
}
, severity = 1
, source = "UrWeb"
, message = #message err
}
(* TODO FFI modules ? Check compiler.sml -> parse -> parseFfi *)
(* TODO Optim: cache parsed urp file? *)
fun elabFile (state: state) (fileName: string): ({ decls: Elab.decl list, envBeforeThisModule: ElabEnv.env} option * LspSpec.diagnostic list) =
let
val () = if (OS.Path.ext fileName = SOME "ur")
then ()
else raise Fail ("Can only handle .ur files for now")
(* val () = Elaborate.unifyMore := true *)
(* To reuse Basis and Top *)
val () = Elaborate.incremental := true
(* Parsing .urp *)
val job = case C.run (C.transform C.parseUrp "parseUrp") (#urpPath state) of
NONE => raise LspSpec.LspError (LspSpec.InternalError ("Couldn't parse .urp file at " ^ (#urpPath state)))
| SOME a => a
val moduleSearchRes =
List.foldl
(fn (entry, acc) => if #2 acc
then acc
else
if entry ^ ".ur" = fileName
then (List.rev (#1 acc), true)
else (entry :: #1 acc, false))
([] (* modules before *), false (* module found *))
(#sources job)
val modulesBeforeThisFile = #1 moduleSearchRes
val () = if #2 moduleSearchRes
then ()
else raise LspSpec.LspError (LspSpec.InternalError ("Couldn't find file " ^ fileName ^ " referenced in .urp file at " ^ (#urpPath state)))
(* Parsing .urs files of previous modules *)
val parsedUrss = List.map (fn entry =>
let
val fileName = entry ^ ".urs"
in
{ fileName = fileName
, parsed =
if OS.FileSys.access (fileName, [])
then case C.run (C.transform C.parseUrs "parseUrs") fileName of
NONE => raise LspSpec.LspError (LspSpec.InternalError ("Failed to parse .urs file at " ^ fileName))
| SOME a => a
else raise LspSpec.LspError (LspSpec.InternalError ("Couldn't find an .urs file for " ^ fileName))
}
end)
modulesBeforeThisFile
(* Parsing Basis and Top *)
val basisF = Settings.libFile "basis.urs"
val topF = Settings.libFile "top.urs"
val topF' = Settings.libFile "top.ur"
val tm1 = OS.FileSys.modTime topF
val tm2 = OS.FileSys.modTime topF'
val parsedBasisUrs =
case C.run (C.transform C.parseUrs "parseUrs") basisF of
NONE => raise LspSpec.LspError (LspSpec.InternalError ("Failed to parse basis.urs file at " ^ basisF))
| SOME a => a
val parsedTopUrs =
case C.run (C.transform C.parseUrs "parseUrs") topF of
NONE => raise LspSpec.LspError (LspSpec.InternalError ("Failed to parse top.urs file at " ^ topF))
| SOME a => a
val parsedTopUr =
case C.run (C.transform C.parseUr "parseUr") topF' of
NONE => raise LspSpec.LspError (LspSpec.InternalError ("Failed to parse top.ur file at " ^ topF'))
| SOME a => a
(* Parsing .ur and .urs of current file *)
val (parsedUrs: Source.sgn option) =
(if OS.FileSys.access (fileName ^ "s", [])
then
case C.run (C.transform C.parseUrs "parseUrs") (fileName ^ "s") of
NONE => NONE
| SOME a => SOME ( Source.SgnConst a
, {file = fileName ^ "s", first = ErrorMsg.dummyPos, last = ErrorMsg.dummyPos})
else
NONE) handle ex => NONE
val () = ErrorMsg.resetErrors ()
val (parsedUrO: (Source.decl list) option) =
C.run (C.transform C.parseUr "parseUr") fileName
in
case parsedUrO of
NONE => (* Parse error *) (NONE, List.map errorToDiagnostic (ErrorMsg.readErrorLog ()))
| SOME parsedUr =>
(* Parsing of .ur succeeded *)
let
val loc = {file = fileName, first = ErrorMsg.dummyPos, last = ErrorMsg.dummyPos}
val envBeforeThisModule = ref ElabEnv.empty
val res = Elaborate.elabFile
parsedBasisUrs tm1 parsedTopUr parsedTopUrs tm2 ElabEnv.empty
(* Adding urs's of previous modules to env *)
(fn envB =>
let
val newEnv = List.foldl (fn (sgn, env) => addSgnToEnv env (#parsed sgn) (#fileName sgn) false) envB parsedUrss
in
(envBeforeThisModule := newEnv; newEnv)
end
)
[( Source.DStr (C.moduleOf fileName, parsedUrs, NONE, (Source.StrConst parsedUr, loc), false)
, loc )]
(* report back errors (as Diagnostics) *)
val errors = ErrorMsg.readErrorLog ()
val decls = case List.last res of
(Elab.DStr (_, _, _, (Elab.StrConst decls, _)), _) => decls
| _ => raise Fail ("Impossible: Source.StrConst did not become Elab.StrConst after elaboration")
in
(SOME { envBeforeThisModule = !envBeforeThisModule, decls = decls },
List.map errorToDiagnostic errors)
end
end
fun handleDocumentSavedOrOpened (state: state) (toclient: LspSpec.toclient) (documentUri: LspSpec.documentUri) (textO: string option) =
let
val fileName = #path documentUri
val res = elabFile state fileName
val text = case textO of
NONE => (case SM.find (#fileStates state, fileName) of
NONE => ((#showMessage toclient) ("No previous state for file " ^ fileName) 2; NONE)
| SOME previousState => SOME (#text previousState))
| SOME text => SOME text
in
case text of
NONE => ()
| SOME text =>
(case #1 res of
NONE =>
insertFileState state fileName { text = text
, envBeforeThisModule = ElabEnv.empty
, decls = [] }
| SOME fs =>
(insertFileState state fileName { text = text
, envBeforeThisModule = #envBeforeThisModule fs
, decls = #decls fs });
#publishDiagnostics toclient { uri = documentUri , diagnostics = #2 res})
end
fun scanDir (f: string -> bool) (path: string) =
let
val dir = OS.FileSys.openDir path
fun doScanDir acc =
case OS.FileSys.readDir dir of
NONE => (OS.FileSys.closeDir dir; acc)
| SOME fname =>
(if f fname
then doScanDir (fname :: acc)
else doScanDir acc)
in
doScanDir []
end
fun readFile (fileName: string): string =
let
val str = TextIO.openIn fileName
fun doReadFile acc =
case TextIO.inputLine str of
NONE => acc
| SOME str => (str ^ "\n" ^ acc)
val res = doReadFile ""
in
(TextIO.closeIn str; res)
end
(* TODO PERF BIG I couldn't figure out how to print just to a string, so writing to a temp file, then reading it, then deleting it, ... *)
fun ppToString (pp: Print.PD.pp_desc) (width: int): string =
let
val tempfile = OS.FileSys.tmpName ()
val outStr = TextIO.openOut tempfile
val outDev = TextIOPP.openOut {dst = outStr, wid = width}
val () = Print.fprint outDev pp
val res = readFile tempfile
val () = TextIO.closeOut outStr
in
res
end
fun handleHover (state: state) (p: LspSpec.hoverReq): LspSpec.hoverResp LspSpec.result =
let
val fileName = #path (#uri (#textDocument p))
val s = SM.find (#fileStates state, fileName)
in
case s of
NONE => LspSpec.Success NONE
| SOME s =>
let
val env = #envBeforeThisModule s
val decls = #decls s
val loc = #position p
val result = GetInfo.getInfo env (Elab.StrConst decls) fileName { line = #line loc + 1
, character = #character loc + 1}
in
case #smallestgoodpart result of
NONE => LspSpec.Success NONE
| SOME {desc = desc, ...} =>
LspSpec.Success (SOME {contents = ppToString desc 70})
end
end
fun getCompletionsFromFields (env: ElabEnv.env) (prefix: string) (searchStr: string) (fields: (Elab.con * Elab.con) list): LspSpec.completionItem list =
let
fun mapF (c1, c2) =
case c1 of
(Elab.CName fieldName, _) =>
if String.isPrefix searchStr fieldName
then SOME { label = prefix ^ fieldName
, kind = LspSpec.Field
, detail = ppToString (ElabPrint.p_con env c2) 150
}
else NONE
| _ => NONE
in
List.mapPartial mapF fields
end
fun getCompletionsFromSignatureItems (env: ElabEnv.env) (prefix: string) (searchStr: string) (items: Elab.sgn_item list): LspSpec.completionItem list =
let
fun mapF item =
case item of
(Elab.SgiVal (name, _, con), _) =>
if String.isPrefix searchStr name
then [{ label = prefix ^ name
, kind = LspSpec.Value
, detail = ppToString (ElabPrint.p_con env con) 150
}]
else []
| (Elab.SgiCon (name, _, _, con), _) =>
if String.isPrefix searchStr name
then [{ label = prefix ^ name
, kind = LspSpec.Value
, detail = ppToString (ElabPrint.p_con env con) 150
}]
else []
| (Elab.SgiDatatype cs, _) =>
(List.concat
(List.map (fn (constr as (dtName, n, xs, constrs)) =>
(* Copied from elab_print *)
let
val k = (Elab.KType, ErrorMsg.dummySpan)
val env = ElabEnv.pushCNamedAs env dtName n k NONE
val env = List.foldl (fn (x, env) => ElabEnv.pushCRel env x k) env xs
val typeVarsString = List.foldl (fn (x, acc) => acc ^ " " ^ x) "" xs
in
List.mapPartial (fn (constrName, _, conO) =>
if String.isPrefix searchStr constrName
then SOME { label = prefix ^ constrName
, kind = LspSpec.Function
, detail = case conO of
NONE => dtName ^ typeVarsString
| SOME con => ppToString (ElabPrint.p_con env con) 150 ^ " -> " ^ dtName ^ typeVarsString
}
else NONE) constrs
end)
cs))
| (Elab.SgiDatatypeImp _, _) =>
(* TODO ??? no idea what this is *)
[]
| (Elab.SgiStr (_, name, _, _), _) =>
if String.isPrefix searchStr name
then [{ label = prefix ^ name
, kind = LspSpec.Module
, detail = ""
}]
else []
| (Elab.SgiClass (name, _, _, con), _) =>
if String.isPrefix searchStr name
then [{ label = prefix ^ name
, kind = LspSpec.Class
, detail = ppToString (ElabPrint.p_con env con) 150
}]
else []
| _ => []
in
List.concat (List.map mapF items)
end
(* TODO TOCHECK look at con's to specify "kind" more accurately *)
fun findMatchingStringInEnv (env: ElabEnv.env) (str: string): LspSpec.completionItem list =
let
val splitted = Substring.fields (fn c => c = #".") (Substring.full str)
in
case splitted of
(_ :: []) =>
if str = ""
then []
else
let
val matchingEs = ElabEnv.matchEByPrefix env str (* function params, let bindings and top-level bindings. Should we discern between Rel and Named? *)
val expressionCompletions = List.map (fn (name,con) =>
{ label = name
, kind = LspSpec.Value
, detail = ppToString (ElabPrint.p_con env con) 150
}) matchingEs
val matchingStrs = ElabEnv.matchStrByPrefix env str
val structureCompletions = List.map (fn (name,(_,sgn)) =>
{ label = name
, kind = LspSpec.Module
, detail = ""
}) matchingStrs
val matchingCons = ElabEnv.matchCByPrefix env str
val conCompletions = List.map (fn (name,kind) =>
{ label = name
, kind = LspSpec.Constructor (* TODO probably wrong... *)
, detail = ppToString (ElabPrint.p_kind env kind) 150
}) matchingCons
in
expressionCompletions @ structureCompletions @ conCompletions
end
| (r :: str :: []) =>
if Char.isUpper (Substring.sub (r, 0))
then
(* Completing STRUCTURE *)
let
(* TODO PERF SMALL: first match and then equal is not perfect *)
val foundStrs = ElabEnv.matchStrByPrefix env (Substring.string r)
val filteredStrs = List.filter (fn (name,_) => name = Substring.string r) foundStrs
in
(case List.map (fn (name, (i, sgn)) => (name, ElabEnv.hnormSgn env sgn)) filteredStrs of
[] => []
| (name, (Elab.SgnConst sgis, _)) :: _ =>
getCompletionsFromSignatureItems env (name ^ ".") (Substring.string str) sgis
| _ => [])
end
else
(* Completing RECORD *)
(* TODO TOCHECK is it correct to first try RelE and then NamedE? *)
let
(* TODO PERF SMALL: first match and then equal is not perfect *)
val foundEs = ElabEnv.matchEByPrefix env (Substring.string r)
val filteredEs = List.filter (fn (name,_) => name = Substring.string r) foundEs
in
(case List.map (fn (name, c) => (name, ElabOps.reduceCon env c)) filteredEs of
[] => []
| (name, (Elab.TRecord (Elab.CRecord (_, fields), l2_), l1_)) :: _ =>
getCompletionsFromFields env (name ^ ".") (Substring.string str) fields
| (name, (* TODO this doesn't always work. I've only managed to get it working for tables in a different module *)
( ( Elab.CApp
( ( (Elab.CApp
( ( Elab.CModProj (_, _, "sql_table")
, l4_)
, ( Elab.CRecord (_, fields)
, l3_)))
, l2_)
, _))
, l1_)) :: _ =>
(debug "!!"; getCompletionsFromFields env (name ^ ".") (Substring.string str) fields)
| _ => [])
end
| _ =>
(* TODO NOTIMPLEMENTED submodules / nested records *)
[]
end
(* TODO IDEA can we use the real parser to figure out what we're typing (exp, con, field, etc) to predict better? *)
fun handleCompletion (state: state) (p: LspSpec.completionReq) =
let
val fileName = #path (#uri (#textDocument p))
val s = SM.find (#fileStates state, fileName)
in
case s of
NONE => LspSpec.Success { isIncomplete = false, items = []}
| SOME s =>
let
val pos = #position p
val line = List.nth (Substring.fields (fn c => c = #"\n") (Substring.full (#text s)), #line pos)
val () = debug ("line" ^ Substring.string line)
val chars = [ (* #".", *) #"(", #")", #"{", #"}", #"[", #"]", #"<", #">", #"-", #"=", #":"
, #" ", #"\n", #"#", #",", #"*", #"\"", #"|", #"&", #"$", #"^", #"+", #";"]
val lineUntilPos = Substring.slice (line, 0, SOME (#character pos))
val () = debug ("lineUntilPos: \"" ^ Substring.string lineUntilPos ^ "\"")
val searchStr = Substring.string (Substring.taker (fn c => not (List.exists (fn c' => c = c') chars)) lineUntilPos)
val () = debug ("Looking for completions for: \"" ^ searchStr ^ "\"")
val env = #envBeforeThisModule s
val decls = #decls s
val getInfoRes = GetInfo.getInfo env (Elab.StrConst decls) fileName { line = #line pos + 1
, character = #character pos + 1}
val envOfSmallest = #env (#smallest getInfoRes)
in
LspSpec.Success { isIncomplete = false
, items = findMatchingStringInEnv envOfSmallest searchStr}
end
end
fun applyContentChange ((c, s): LspSpec.contentChange * string): string =
case (#range c, #rangeLength c) of
(SOME range, SOME _) =>
let
val lines = Substring.fields (fn c => c = #"\n") (Substring.full s)
val linesBefore = List.take (lines, #line (#start range))
val linesAfter = List.drop (lines, #line (#end_ range) + 1)
val startLine = List.nth (lines, #line (#start range))
val startText = Substring.slice (startLine, 0, SOME (#character (#start range)))
val endLine = List.nth (lines, #line (#end_ range))
val endText = Substring.triml (#character (#end_ range)) endLine
in
Substring.concatWith "\n" (linesBefore
@ [Substring.full (Substring.concat [startText, Substring.full (#text c), endText])]
@ linesAfter)
end
| _ =>
#text c
fun handleDocumentDidChange (state: state) (toclient: LspSpec.toclient) (p: LspSpec.didChangeParams): unit =
let
val fileName = #path (#uri (#textDocument p))
val s = SM.find (#fileStates state, fileName)
in
case s of
NONE =>
(debug ("Got change event for file that isn't open: " ^ fileName);
(#showMessage toclient) ("Got change event for file that isn't open: " ^ fileName) 1)
| SOME s =>
let
val newtext = List.foldl applyContentChange (#text s) (#contentChanges p)
in
insertFileState state fileName { text = newtext
, decls = #decls s
, envBeforeThisModule = #envBeforeThisModule s}
end
end
fun handleDocumentDidClose (state: state) (toclient: LspSpec.toclient) (p: LspSpec.didCloseParams): unit =
let
val fileName = #path (#uri (#textDocument p))
val s = SM.find (#fileStates state, fileName)
in
stateRef := SOME { urpPath = #urpPath state
, fileStates = (#1 (SM.remove (#fileStates state, fileName))) handle ex => #fileStates state
}
end
fun serverLoop () =
let
val state = !stateRef
val requestMessage =
LspSpec.readRequestFromStdIO ()
handle ex => (debug (General.exnMessage ex) ; raise ex)
in
case state of
NONE =>
(case requestMessage of
LspSpec.RequestMessage m =>
LspSpec.handleMessage
m
{ initialize = fn p =>
(let val st = initState p
in
stateRef := SOME st;
LspSpec.Success
{ capabilities =
{ hoverProvider = true
, completionProvider = SOME { triggerCharacters = ["."]}
, textDocumentSync = { openClose = true
, change = 2
, save = SOME { includeText = false }
}}
}
end)
handle (Fail str) => LspSpec.Error (~32602, str)
, shutdown = fn () => LspSpec.Error (~32002, "Server not initialized")
, textDocument_hover = fn toclient => fn _ => LspSpec.Error (~32002, "Server not initialized")
, textDocument_completion = fn _ => LspSpec.Error (~32002, "Server not initialized")
}
| LspSpec.Notification n => ())
| SOME state =>
(case requestMessage of
LspSpec.Notification n =>
(LspSpec.handleNotification
n
{ initialized = fn () => ()
, textDocument_didOpen = fn toclient => fn p => handleDocumentSavedOrOpened state toclient (#uri (#textDocument p)) (SOME (#text (#textDocument p)))
, textDocument_didChange = handleDocumentDidChange state
, textDocument_didSave = fn toclient => fn p => handleDocumentSavedOrOpened state toclient (#uri (#textDocument p)) NONE
, textDocument_didClose = fn toclient => fn p => handleDocumentDidClose state toclient p
})
| LspSpec.RequestMessage m =>
(* TODO should error handling here be inside handleMessage? *)
(LspSpec.handleMessage
m
{ initialize = fn _ => LspSpec.Error (~32600, "Server already initialized")
, shutdown = fn () => LspSpec.Success ()
, textDocument_hover = fn toclient => handleHover state
, textDocument_completion = handleCompletion state
})
)
end
fun startServer () = while true do serverLoop ()
end
|