Strip down iTasks.UI.JS.Interface; initial working version of the wasm interface

Examples/WasmTest.icl

+module WasmTest
+
+import StdEnv
+import Data.Error
+from Data.Func import $
+
+import iTasks.Engine
+import iTasks.Internal.Client.Serialization
+import iTasks.UI.Definition
+import iTasks.UI.Editor
+import iTasks.UI.JS.Interface
+import iTasks.UI.Prompt
+import iTasks.WF.Tasks.Interaction
+
+// TODO: remove
+import Text.GenJSON
+
+Start w = doTasks task w
+
+//import iTasks.Internal.SDS
+//import iTasks.SDS.Sources.System
+//
+//task = viewSharedInformation "Current date and time" [] currentDateTime
+
+task = updateInformation "test"
+	[ UpdateUsing (\m -> m) (\_ v -> v) $ leafEditorToEditor
+		{ LeafEditor
+		| genUI          = withClientSideInit initUI genUI
+		, onEdit         = \_ (_,st) _ vst -> (Ok (NoChange, st), vst)
+		, onRefresh      = \_ new old vst
+			| new == old -> (Ok (NoChange, new), vst)
+			| otherwise  -> undef // TODO: serialize
+		, valueFromState = Just
+		}
+	]
+	37
+where
+	initUI :: !(JSObj ()) !*JSWorld -> *JSWorld
+	initUI comp w
+	# (jsInitDOMEl,w) = jsWrapFun (initDOMEl comp) w
+	# w = (comp .# "initDOMEl" .= jsInitDOMEl) w
+	= w
+	where
+		initDOMEl :: !(JSObj ()) !*JSWorld -> (!JSVal a, !*JSWorld)
+		initDOMEl comp w
+		# w = (comp .# "domEl.value" .= toJS 37) w
+		= (jsNull,w)
+
+	genUI :: !UIAttributes !DataPath !(EditMode s) !*VSt -> *(!MaybeErrorString (!UI, !s), !*VSt)
+	genUI attr dp mode vst = case editModeValue mode of
+		Nothing
+			-> (Error "cannot be in enter mode", vst)
+		Just val
+			# (s,vst) = serialize_in_vst val vst
+			-> (Ok (ui UITextField, val), vst)

Libraries/iTasks/Extensions/Admin/TonicAdmin.icl

@@ -20,7 +20,6 @@ from Control.Monad import `b`, class Monad(bind)
 import qualified iTasks.Internal.SDS as DSDS
 import Data.List
 from iTasks.Extensions.SVG.SVGEditor import fromSVGEditor, :: SVGEditor {..}
-import iTasks.UI.JS.Encoding
 from Data.IntMap.Strict import :: IntMap
 import qualified Data.IntMap.Strict as DIS
 import Data.Maybe
@@ -35,9 +34,6 @@ derive gDefault Set
 derive JSONEncode Set
 derive JSONDecode Set
 
-derive JSEncode ActionState, TClickAction, ClickMeta, TonicImageState, BlueprintRef, TonicFunc, TExpr, TPriority, TLit, TAssoc
-derive JSDecode ActionState, TClickAction, ClickMeta, TonicImageState, BlueprintRef, TonicFunc, TExpr, TPriority, TLit, TAssoc
-
 tonic :: Task ()
 tonic = tonicDashboard []
 

Libraries/iTasks/Extensions/DateTime.icl

@@ -23,7 +23,7 @@ import Text, Text.GenJSON, System.Time
 import Data.Maybe, Data.Error 
 import qualified Data.Map as DM
 
-from iTasks.Extensions.Form.Pikaday import pikadayDateField
+//from iTasks.Extensions.Form.Pikaday import pikadayDateField // TODO restore
 from iTasks.Internal.Util import tmToDateTime
 
 //* (Local) date and time
@@ -69,7 +69,9 @@ JSONDecode{|Date|} _ c = (Nothing, c)
 
 gText{|Date|} _ val = [maybe "" toString val]
 
-gEditor{|Date|} = pikadayDateField 
+// TODO restore
+//gEditor{|Date|} = pikadayDateField
+derive gEditor Date
 
 gDefault{|Date|} = {Date|day = 1, mon = 1, year = 2017}
 derive gEq Date

Libraries/iTasks/Extensions/SVG/SVGEditor.dcl

 definition module iTasks.Extensions.SVG.SVGEditor
 
 import Graphics.Scalable.Internal.Image`
-from iTasks.UI.Editor import :: Editor
-import iTasks.UI.JS.Encoding
+from iTasks import :: Editor, generic gEq,
+	generic JSONEncode, generic JSONDecode, :: JSONNode
 
 // An SVGEditor let's you specify an editor as an interactive SVG image (Graphics.Scalable.Image)
 :: SVGEditor m v =
@@ -11,5 +11,4 @@ import iTasks.UI.JS.Encoding
 	, updModel    :: m v -> m                    // When the view is updated (using the image), the change needs to be merged back into the view
 	}
 
-fromSVGEditor :: (SVGEditor s v) -> Editor s
-               | gEq{|*|}, JSONEncode{|*|}, JSONDecode{|*|}, JSEncode{|*|}, JSDecode{|*|} s
+fromSVGEditor :: (SVGEditor s v) -> Editor s | gEq{|*|}, JSONEncode{|*|}, JSONDecode{|*|} s

Libraries/iTasks/Extensions/SVG/SVGEditor.icl

 implementation module iTasks.Extensions.SVG.SVGEditor
 
 import Graphics.Scalable.Internal.Image`
-import iTasks.UI.Definition, iTasks.UI.Editor, iTasks.UI.JS.Encoding
+import iTasks.UI.Definition, iTasks.UI.Editor
 
 import StdEnv
 
@@ -23,17 +23,17 @@ CLICK_DELAY :== 225
 svgns =: "http://www.w3.org/2000/svg"
 
 //Predefined object methods
-(`addEventListener`)      obj args :== obj .# "addEventListener"      .$ args
-(`setAttribute`)          obj args :== obj .# "setAttribute"          .$ args
-(`setAttributeNS`)        obj args :== obj .# "setAttributeNS"        .$ args
-(`createElementNS`)       obj args :== obj .# "createElementNS"       .$ args
-(`appendChild`)           obj args :== obj .# "appendChild"           .$ args
-(`removeChild`)           obj args :== obj .# "removeChild"           .$ args
-(`getComputedTextLength`) obj args :== obj .# "getComputedTextLength" .$ args
-(`createSVGPoint`)        obj args :== obj .# "createSVGPoint"        .$ args
-(`getScreenCTM`)          obj args :== obj .# "getScreenCTM"          .$ args
-(`inverse`)               obj args :== obj .# "inverse"               .$ args
-(`matrixTransform`)       obj args :== obj .# "matrixTransform"       .$ args
+//(`addEventListener`)      obj args :== obj .# "addEventListener"      .$ args
+//(`setAttribute`)          obj args :== obj .# "setAttribute"          .$ args
+//(`setAttributeNS`)        obj args :== obj .# "setAttributeNS"        .$ args
+//(`createElementNS`)       obj args :== obj .# "createElementNS"       .$ args
+//(`appendChild`)           obj args :== obj .# "appendChild"           .$ args
+//(`removeChild`)           obj args :== obj .# "removeChild"           .$ args
+//(`getComputedTextLength`) obj args :== obj .# "getComputedTextLength" .$ args
+//(`createSVGPoint`)        obj args :== obj .# "createSVGPoint"        .$ args
+//(`getScreenCTM`)          obj args :== obj .# "getScreenCTM"          .$ args
+//(`inverse`)               obj args :== obj .# "inverse"               .$ args
+//(`matrixTransform`)       obj args :== obj .# "matrixTransform"       .$ args
 
 :: ImageSpanReal :== (!Real, !Real)
 
@@ -51,9 +51,8 @@ svgns =: "http://www.w3.org/2000/svg"
 
 derive gEq MousePos
 
-fromSVGEditor :: (SVGEditor s v) -> Editor s
-               | gEq{|*|}, JSONEncode{|*|}, JSONDecode{|*|}, JSEncode{|*|}, JSDecode{|*|} s
-fromSVGEditor svglet = leafEditorToEditor
+fromSVGEditor :: (SVGEditor s v) -> Editor s | gEq{|*|}, JSONEncode{|*|}, JSONDecode{|*|} s
+fromSVGEditor svglet = undef /* FIXME: restore leafEditorToEditor
     { LeafEditor
     | genUI          = withClientSideInit initUI genUI
     , onEdit         = onEdit
@@ -816,3 +815,4 @@ keepTransformAttrsTogether attr attrs
 isTransformAttr :: !SVGAttr -> Bool
 isTransformAttr (TransformAttr _) = True
 isTransformAttr _ = False
+*/

Libraries/iTasks/Internal/Client/Serialization.dcl

@@ -2,5 +2,8 @@ definition module iTasks.Internal.Client.Serialization
 
 from Data.Error import :: MaybeError, :: MaybeErrorString
 from iTasks.Internal.IWorld import :: IWorld
+from iTasks.UI.Editor import :: VSt
 
 serialize_for_client :: f !*IWorld -> *(!MaybeErrorString String, !*IWorld)
+
+serialize_in_vst :: f !*VSt -> *(!String, !*VSt)

Libraries/iTasks/Internal/Client/Serialization.icl

@@ -10,6 +10,7 @@ import ABC.Interpreter
 
 import iTasks.Engine
 import iTasks.Internal.IWorld
+import iTasks.UI.Editor
 
 serialize_for_client :: f !*IWorld -> *(!MaybeErrorString String, !*IWorld)
 serialize_for_client f iworld=:{world,options}
@@ -20,3 +21,10 @@ serialize_for_client f iworld=:{world,options}
 	Nothing -> Error "Failed to serialize graph"
 	Just g  -> Ok g
 = (graph, iworld)
+
+serialize_in_vst :: f !*VSt -> *(!String, !*VSt)
+serialize_in_vst f vst=:{iworld}
+# (s,iworld) = serialize_for_client f iworld
+= case s of
+	Error e -> abort (e+++"\n")
+	Ok s    -> (s, {vst & iworld=iworld})

Libraries/iTasks/Internal/TaskEval.icl

@@ -19,7 +19,6 @@ from iTasks.SDS.Combinators.Common      import sdsFocus, >*|, mapReadWrite, mapR
 from StdFunc import const, o
 import qualified Data.CircularStack as DCS
 from Data.CircularStack import :: CircularStack
-from iTasks.Internal.Tonic.AbsSyn import :: ExprId (..)
 
 derive gEq TIMeta, TIType
 

Libraries/iTasks/Internal/Tonic/Images.icl

@@ -7,6 +7,7 @@ import Data.Func
 import Data.List
 import Data.Maybe
 import Data.Either
+import Data.Functor
 import qualified Data.Map as DM
 from Data.Map import instance Functor (Map a)
 from Data.Set import :: Set
@@ -33,7 +34,6 @@ import iTasks.Internal.Tonic.Types
 import iTasks.Internal.Tonic.Pretty
 import iTasks.UI.Definition
 from iTasks.Extensions.SVG.SVGEditor import fromSVGEditor, :: SVGEditor {..}
-import iTasks.UI.JS.Encoding
 import Text
 import StdMisc
 

Libraries/iTasks/Internal/Tonic/Server.icl

@@ -13,7 +13,6 @@ from Data.IntMap.Strict import :: IntMap
 import iTasks.Internal.Tonic.Blueprints
 import iTasks.Extensions.Admin.TonicAdmin
 import iTasks.Extensions.SVG.SVGEditor
-import iTasks.UI.JS.Encoding
 import iTasks.Extensions.DateTime
 import iTasks.Internal.Tonic.AbsSyn
 import iTasks.Internal.Tonic.Types

Libraries/iTasks/UI/Editor.dcl

@@ -6,7 +6,6 @@ definition module iTasks.UI.Editor
 
 from iTasks.UI.Definition import :: UI, :: UIAttributes, :: UIChange, :: UIAttributeChange, :: TaskId
 from iTasks.UI.JS.Interface import :: JSWorld, :: JSObj, :: JSVal, :: JSObject
-from iTasks.UI.JS.Encoding import generic JSDecode
 
 from iTasks.Internal.IWorld import :: IWorld
 from iTasks.Internal.Generic.Defaults import generic gDefault
@@ -55,12 +54,12 @@ from Control.GenBimap import generic bimap, :: Bimap
 	, valueFromState :: !st -> Maybe a
 	}
 
-leafEditorToEditor :: !(LeafEditor edit st a) -> Editor a | JSDecode{|*|} edit & JSONEncode{|*|}, JSONDecode{|*|} st
+leafEditorToEditor :: !(LeafEditor edit st a) -> Editor a | JSONEncode{|*|}, JSONDecode{|*|} st
 
 //Version without overloading, for use in generic case
 //The first two argument should be JSONEncode{|*|} and JSONDecode{|*|} which cannot be used by overloading within generic functions
 leafEditorToEditor_ :: !(Bool st -> [JSONNode]) !(Bool [JSONNode] -> (!Maybe st, ![JSONNode])) !(LeafEditor edit st a)
-                    -> Editor a | JSDecode{|*|} edit
+                    -> Editor a
 
 /*
 *	Definition of a compound editor using an additional typed state, next to the children's states.

Libraries/iTasks/UI/Editor.icl

 implementation module iTasks.UI.Editor
 
-import StdBool, StdMisc, StdList, StdTuple
+import StdEnv
 import Data.Maybe, Data.Functor, Data.Tuple, Data.Func, Data.Error
 import iTasks.Internal.IWorld
 import iTasks.Internal.Client.Serialization
-import iTasks.UI.Definition, iTasks.WF.Definition, iTasks.UI.JS.Encoding
+import iTasks.UI.Definition, iTasks.WF.Definition, iTasks.UI.JS.Interface
 import qualified Data.Map as DM
 import Text, Text.GenJSON
 import Data.GenEq
@@ -13,20 +13,20 @@ derive JSONEncode EditState, LeafState, EditMode
 derive JSONDecode EditState, LeafState, EditMode
 derive gEq        EditState, LeafState
 
-leafEditorToEditor :: !(LeafEditor edit st a) -> Editor a | JSDecode{|*|} edit & JSONEncode{|*|}, JSONDecode{|*|} st
+leafEditorToEditor :: !(LeafEditor edit st a) -> Editor a | JSONEncode{|*|}, JSONDecode{|*|} st
 leafEditorToEditor leafEditor = leafEditorToEditor_ JSONEncode{|*|} JSONDecode{|*|} leafEditor
 
 leafEditorToEditor_ :: !(Bool st -> [JSONNode]) !(Bool [JSONNode] -> (!Maybe st, ![JSONNode])) !(LeafEditor edit st a)
-                    -> Editor a | JSDecode{|*|} edit
+                    -> Editor a
 leafEditorToEditor_ jsonEncode jsonDecode leafEditor =
 	{Editor| genUI = genUI, onEdit = onEdit, onRefresh = onRefresh, valueFromState = valueFromState}
 where
 	genUI attr dp val vst = mapRes False $ leafEditor.LeafEditor.genUI attr dp val vst
 
 	onEdit dp (tp, jsone) (LeafState {state}) vst = case fromJSON` state of
-		Just st = case decodeOnServer jsone of
+		Just st = undef /*case decodeOnServer jsone of // FIXME: decodeOnServer
 			Just e = mapRes True $ leafEditor.LeafEditor.onEdit dp (tp, e) st vst
-			_      = (Error ("Invalid edit event for leaf editor: " +++ toString jsone), vst)
+			_      = (Error ("Invalid edit event for leaf editor: " +++ toString jsone), vst) */
 		_       = (Error "Corrupt internal state in leaf editor", vst)
 	onEdit _ _ _ vst = (Error "Corrupt editor state in leaf editor", vst)
 
@@ -152,7 +152,7 @@ withClientSideInit ::
 	!(UIAttributes DataPath a *VSt -> *(!MaybeErrorString (!UI, !st), !*VSt))
 	!UIAttributes !DataPath !a !*VSt -> *(!MaybeErrorString (!UI, !st), !*VSt)
 withClientSideInit initUI genUI attr dp val vst=:{VSt|taskId} = case genUI attr dp val vst of
-	(Ok (UI type attr items,mask),vst=:{VSt|iworld}) -> case serialize_for_client initUI iworld of
+	(Ok (UI type attr items,mask),vst=:{VSt|iworld}) -> case serialize_for_client initUI` iworld of
 		(Ok initUI,iworld)
 			# extraAttr = 'DM'.fromList
 				[("taskId",  JSONString taskId)
@@ -163,3 +163,6 @@ withClientSideInit initUI genUI attr dp val vst=:{VSt|taskId} = case genUI attr
 		(Error e,iworld)
 			-> (Error e, {VSt|vst & iworld = iworld})
 	e -> e
+where
+	initUI` :: Int *JSWorld -> *JSWorld
+	initUI` ref_to_js_elem world = initUI (referenceToJS ref_to_js_elem) world

Libraries/iTasks/UI/Editor/Controls.dcl

@@ -5,7 +5,6 @@ definition module iTasks.UI.Editor.Controls
 */
 from iTasks.UI.Editor import :: Editor
 from iTasks.UI.Definition import :: UIAttributes, :: UIType
-from iTasks.UI.JS.Encoding import generic JSDecode
 from Data.Maybe import :: Maybe
 from Data.Map import :: Map
 from Text.HTML import :: HtmlTag
@@ -126,7 +125,7 @@ withConstantChoices :: !choices !(Editor (!choices, ![Int])) -> Editor [Int]
 
 fieldComponent
 	:: !UIType !(Maybe a) !(UIAttributes a -> Bool) -> Editor a
-	| JSONDecode{|*|}, JSONEncode{|*|}, gEq{|*|} a & JSDecode{|*|} a
+	| JSONDecode{|*|}, JSONEncode{|*|}, gEq{|*|} a
 
 //Convenient types for describing the values of grids and trees
 :: ChoiceText =

Libraries/iTasks/UI/Editor/Controls.icl

@@ -122,7 +122,7 @@ where
 //Field like components for which simply knowing the UI type is sufficient
 fieldComponent
 	:: !UIType !(Maybe a) !(UIAttributes a -> Bool) -> Editor a
-	| JSONDecode{|*|}, JSONEncode{|*|}, gEq{|*|} a & JSDecode{|*|} a
+	| JSONDecode{|*|}, JSONEncode{|*|}, gEq{|*|} a
 fieldComponent type mbEditModeInitValue isValid = disableOnView $ editorWithJSONEncode (leafEditorToEditor o leafEditor)
 where 
 	leafEditor toJSON =

Libraries/iTasks/UI/JS/Encoding.dcl

-definition module iTasks.UI.JS.Encoding
-/**
-* This module provides encoding/decoding functions for communicating values efficiently
-* between an itasks server application and its client (webbrowser).
-* It uses an encoding of Clean values as JSON that can be decoded natively in javascript
-*/
-import iTasks.UI.JS.Interface
-import StdGeneric
-from Text.GenJSON import :: JSONNode (..)
-from StdList import !!
-from StdMaybe import :: Maybe
-from StdInt import bitand, <<
-from StdClass import class IncDec(inc)
-
-//Sending values server -> client
-encodeOnServer :: !a -> JSONNode | JSEncode{|*|} a //Don't specialize JSEncode, it will break decoding
-decodeOnClient :: !(JSVal a) !*JSWorld -> *(!a, !*JSWorld)
-
-//Sending values client -> server
-encodeOnClient :: !a *JSWorld -> (!JSVal a, !*JSWorld)
-decodeOnServer :: !JSONNode -> (Maybe a) | JSDecode{|*|} a //Don't specialize JSDecode, it will break on the fixed encoding
-
-generic JSEncode t :: !t -> [JSONNode]
-derive  JSEncode Int, Real, Char, Bool, String, UNIT, [],
-	(), (,), (,,), (,,,), (,,,,), (,,,,,), (,,,,,,), (,,,,,,,), {}, {!}, (->),
-    EITHER, OBJECT, Maybe, JSONNode
-
-JSEncode{|CONS of {gcd_name,gcd_index,gcd_strict_arguments}|} fx (CONS x)
-	= [JSONArray [JSONInt gcd_index, JSONString gcd_name :
-		[if (gcd_strict_arguments bitand (1 << i) == 0)
-			arg
-			(case arg of JSONArray [arr] -> arr; arr -> arr)
-		\\ arg <- fx x & i <- [0..]]]]
-
-JSEncode{|RECORD of {grd_name}|} fx (RECORD x) = [JSONArray [JSONInt 0, JSONString ("_" +++ grd_name) : fx x]]
-
-JSEncode{|FIELD of {gfd_cons,gfd_index}|} fx (FIELD x)
-| gfd_cons.grd_strict_fields bitand (1 << gfd_index) == 0
-	= fx x
-	= case fx x of
-		[JSONArray [arr]] -> [arr]
-		arr -> arr
-
-JSEncode{|PAIR|} fx fy (PAIR x y) = fx x ++ fy y
-where
-    (++) infixr 5::![.a] !u:[.a] -> u:[.a]
-    (++) [hd:tl]    list    = [hd:tl ++ list]
-    (++) nil        list    = list
-
-generic JSDecode t :: ![JSONNode] -> (!Maybe t,![JSONNode])
-derive  JSDecode Int, Real, Char, Bool, String, UNIT, EITHER, CONS of {gcd_name}, OBJECT, [], (), (,), (,,), (,,,), (,,,,), (,,,,,), (,,,,,,), (,,,,,,,), {}, {!}, Maybe, JSONNode
-
-JSDecode{|PAIR|} fx fy l = d1 fy (fx l) l
-  where
-  d1 :: !([JSONNode] -> (!Maybe b, ![JSONNode])) !(!Maybe a, ![JSONNode]) ![JSONNode]
-     -> (!Maybe (PAIR a b), ![JSONNode])
-  d1 fy (Just x,xs)  l = d2 x (fy xs) l
-  d1 _  (Nothing, _) l = (Nothing, l)
-
-  d2 :: !a !(!Maybe b, ![JSONNode]) ![JSONNode] -> (!Maybe (PAIR a b), ![JSONNode])
-  d2 x (Just y, ys) l = (Just (PAIR x y), ys)
-  d2 x (Nothing, _) l = (Nothing, l)
-
-JSDecode{|RECORD|} fx l=:[obj=:JSONObject fields : xs] = d (fx [obj]) xs l
-  where
-  d :: !(Maybe a, b) ![JSONNode] ![JSONNode] -> (!Maybe (RECORD a), ![JSONNode])
-  d (Just x, _)  xs l = (Just (RECORD x),xs)
-  d (Nothing, _) xs l = (Nothing, l)
-JSDecode{|RECORD|} fx l=:[obj=:JSONArray fields : xs] = d (fx [obj]) xs l
-  where
-  d :: !(Maybe a, b) ![JSONNode] ![JSONNode] -> (!Maybe (RECORD a), ![JSONNode])
-  d (Just x, _)  xs l = (Just (RECORD x),xs)
-  d (Nothing, _) xs l = (Nothing, l)
-JSDecode{|RECORD|} fx l = (Nothing,l)
-
-JSDecode{|FIELD of {gfd_name}|} fx l =:[JSONObject fields]
-  #! field = findField gfd_name fields
-  = case fx field of
-      (Just x, _) = (Just (FIELD x), l)
-      (_, _)      = (Nothing, l)
-  where
-  findField :: !String ![(!String, !JSONNode)] -> [JSONNode]
-  findField match [(l,x):xs]
-    | l == match = [x]
-    | otherwise  = findField match xs
-  findField match [] = []
-JSDecode{|FIELD of {gfd_index}|} fx l =:[JSONArray fields]
-  #! field = fields !! gfd_index
-  = case fx [field] of
-      (Just x, _) = (Just (FIELD x), l)
-      (_, _)      = (Nothing, l)
-JSDecode{|FIELD|} fx l = (Nothing, l)

Libraries/iTasks/UI/JS/Encoding.icl

-implementation module iTasks.UI.JS.Encoding
-
-import iTasks.UI.JS.Interface
-import Text.GenJSON
-import Text.Encodings.Base64
-import StdMisc, StdArray, StdTuple, StdList
-import dynamic_string
-
-/*
-When we encode values on the server we directly encode to the representation used by the Sapl run-time such that
-additional decoding on the client is not longer necessary.
-*/
-/*
-* Format of sapl representation:
-ADTs:
-[<index of cons>,<name of cons>, <args ...>]
-Records (same as ADT, record type with an underscore prepended is used as cons name):
-[0, '_' + <name of type>, <args ...>]
-Primitives:
-[<boxed primitive>]
-Thunks:
-[<function ref>,[<args ...>]]
-*/
-
-encodeOnServer :: !a -> JSONNode | JSEncode{|*|} a
-encodeOnServer x = case JSEncode{|*|} x of 
-	[node] = node
-	_      = JSONError
-
-decodeOnClient :: !(JSVal a) !*JSWorld -> *(!a, !*JSWorld)
-decodeOnClient val world = undef //Implemented in iTasks/Sapl FFI
-
-generic JSEncode t :: !t -> [JSONNode]
-JSEncode{|Int|} x = [JSONArray [JSONInt x]]
-JSEncode{|Real|} x = [JSONArray [JSONReal x]]
-JSEncode{|Char|} x = [JSONArray [JSONString {x}]]
-JSEncode{|Bool|} x = [JSONArray [JSONBool x]]
-JSEncode{|String|} x = [JSONArray [JSONString x]]
-JSEncode{|UNIT|} (UNIT) = []
-JSEncode{|PAIR|} fx fy (PAIR x y) = fx x ++ fy y
-where
-	(++) infixr 5::![.a] !u:[.a] -> u:[.a]
-	(++) [hd:tl]	list	= [hd:tl ++ list]
-	(++) nil 		list	= list
-
-JSEncode{|EITHER|} fx fy (LEFT x) = fx x
-JSEncode{|EITHER|} fx fy (RIGHT y) = fy y
-JSEncode{|OBJECT|} fx (OBJECT x) = fx x
-
-JSEncode{|CONS of {gcd_name,gcd_index,gcd_strict_arguments}|} fx (CONS x)
-	= [JSONArray [JSONInt gcd_index, JSONString gcd_name :
-		[if (gcd_strict_arguments bitand (1 << i) == 0)
-			arg
-			(case arg of JSONArray [arr] -> arr; arr -> arr)
-		\\ arg <- fx x & i <- [0..]]]]
-
-JSEncode{|RECORD of {grd_name}|} fx (RECORD x) = [JSONArray [JSONInt 0, JSONString ("_" +++ grd_name) : fx x]]
-
-JSEncode{|FIELD of {gfd_cons,gfd_index}|} fx (FIELD x)
-| gfd_cons.grd_strict_fields bitand (1 << gfd_index) == 0
-	= fx x
-	= case fx x of
-		[JSONArray [arr]] -> [arr]
-		arr -> arr
-
-JSEncode{|{}|} fx x = [JSONArray (flatten [fx e \\ e <-: x])]
-JSEncode{|{!}|} fx x = [JSONArray (flatten [fx e \\ e <-: x])]
-JSEncode{|(->)|} fx fy x = [JSONString "error"]
-JSEncode{|JSONNode|} node = [node]
-
-derive JSEncode [],(),(,),(,,),(,,,),(,,,,),(,,,,,),(,,,,,,),(,,,,,,,), Maybe
-
-encodeOnClient :: !a *JSWorld -> (!JSVal a, !*JSWorld)
-encodeOnClient val world = undef //Implemented in iTasks/Sapl FFI
-
-decodeOnServer :: !JSONNode -> (Maybe a) | JSDecode{|*|} a 
-decodeOnServer node = fst (JSDecode{|*|} [node])
-
-//Currently, this is just a copy of JSONDecode without the special treatment of maybe values
-//but the encoding could be further optimized for its use in editlets
-generic JSDecode t :: ![JSONNode] -> (!Maybe t, ![JSONNode])
-
-JSDecode{|Int|} [JSONInt i:xs] = (Just i, xs)
-JSDecode{|Int|} l              = (Nothing, l)
-
-JSDecode{|Real|} [JSONReal r:xs] = (Just r, xs)
-JSDecode{|Real|} [JSONInt i:xs]	 = (Just (toReal i), xs)
-JSDecode{|Real|} l				 = (Nothing, l)
-
-JSDecode{|Char|} l=:[JSONString s:xs]
-	| size s == 1   = (Just s.[0],xs)
-				    = (Nothing, l)
-JSDecode{|Char|} l  = (Nothing, l)
-
-JSDecode{|Bool|} [JSONBool b:xs] = (Just b,xs)
-JSDecode{|Bool|} l               = (Nothing, l)
-
-JSDecode{|String|} [JSONString s:xs] = (Just s, xs)
-JSDecode{|String|} l                 = (Nothing, l)
-
-JSDecode{|UNIT|} l                   = (Just UNIT, l)
-
-JSDecode{|PAIR|} fx fy l = d1 fy (fx l) l
-  where
-  d1 :: !([JSONNode] -> (!Maybe b, ![JSONNode])) !(!Maybe a, ![JSONNode]) ![JSONNode]
-     -> (!Maybe (PAIR a b), ![JSONNode])
-  d1 fy (Just x,xs)  l = d2 x (fy xs) l
-  d1 _  (Nothing, _) l = (Nothing, l)
-
-  d2 :: !a !(!Maybe b, ![JSONNode]) ![JSONNode] -> (!Maybe (PAIR a b), ![JSONNode])
-  d2 x (Just y, ys) l = (Just (PAIR x y), ys)
-  d2 x (Nothing, _) l = (Nothing, l)
-
-JSDecode{|EITHER|} fx fy l = case fx l of
-	(Just x, xs)				= (Just (LEFT x),xs)
-	(Nothing, xs)				= case fy l of
-		(Just y, ys)			= (Just (RIGHT y),ys)
-		(Nothing, ys)			= (Nothing, l)
-
-JSDecode{|OBJECT|} fx l = case fx l of
-	(Just x, xs)	= (Just (OBJECT x),xs)
-	_				= (Nothing, l)
-
-JSDecode{|CONS of {gcd_name}|} fx l=:[JSONArray [JSONString name:fields] :xs]
-	| name == gcd_name				= case fx fields of
-		(Just x, _)					= (Just (CONS x), xs)
-		_							= (Nothing, l)
-	| otherwise						= (Nothing, l)		
-JSDecode{|CONS|} fx l = (Nothing, l)
-
-JSDecode{|RECORD|} fx l=:[obj=:JSONObject fields : xs] = d (fx [obj]) xs l
-  where
-  d :: !(!Maybe a, b) ![JSONNode] ![JSONNode] -> (!Maybe (RECORD a), ![JSONNode])
-  d (Just x, _)  xs l = (Just (RECORD x),xs)
-  d (Nothing, _) xs l = (Nothing, l)
-JSDecode{|RECORD|} fx l=:[obj=:JSONArray fields : xs] = d (fx [obj]) xs l
-  where
-  d :: !(!Maybe a, b) ![JSONNode] ![JSONNode] -> (!Maybe (RECORD a), ![JSONNode])
-  d (Just x, _)  xs l = (Just (RECORD x),xs)
-  d (Nothing, _) xs l = (Nothing, l)
-JSDecode{|RECORD|} fx l = (Nothing,l)
-
-JSDecode{|FIELD of {gfd_name}|} fx l =:[JSONObject fields]
-  #! field = findField gfd_name fields
-  = case fx field of
-      (Just x, _) = (Just (FIELD x), l)