{-

Module : $Header$

Copyright : (c) Jorina Freya Gerken, Till Mossakowski, Uni Bremen 2002-2004

Licence : similar to LGPL, see HetCATS/LICENCE.txt or LIZENZ.txt

Maintainer : hets@tzi.de

Stability : provisional

Portability : non-portable (imports Logic)

Conversion of development graphs from Logic.DevGraph

to abstract graphs of the graph display interface

-}

{-

todo:

share strings to avoid typos

hiding of internal nodes:

internal nodes that are not between named nodes should be kept

display inclusions and inter-logic links in special colour

try different graph layout algorithms for daVinci (dot?)

close program when all windows are closed

issue warning when theory cannot be flattened

different linktypes for local and hiding definition links

-}

module GUI.ConvertDevToAbstractGraph where

import Logic.Logic

import Logic.Grothendieck

import Logic.Comorphism

import Comorphisms.LogicGraph

import Syntax.AS_Library

import Static.DevGraph

import Static.DGToSpec

import Proofs.Proofs

import GUI.AbstractGraphView

import GUI.ShowLogicGraph

import GUI.HTkUtils

import GUI.Taxonomy (displayConceptGraph,displaySubsortGraph)

import FileDialog

import Events

import System.Directory

import Broadcaster(newSimpleBroadcaster,applySimpleUpdate)

import Sources(toSimpleSource)

import DaVinciGraph

import GraphDisp

import GraphConfigure

import TextDisplay

import Configuration

import qualified HTk

import qualified Common.Lib.Map as Map

import Common.Lib.Pretty as Pretty hiding (isEmpty)

import Common.Id

import Common.PrettyPrint

import qualified Common.Result as Res

import Common.GlobalAnnotations

import Driver.Options

import Driver.WriteFn

import Driver.ReadFn

import Data.Graph.Inductive.Graph as Graph

import Data.IORef

import Data.Maybe

import List(nub)

import Control.Monad

{- Maps used to track which node resp edge of the abstract graph

correspondes with which of the development graph and vice versa and

one Map to store which libname belongs to which development graph-}

data ConversionMaps = ConversionMaps {

dg2abstrNode :: DGraphToAGraphNode,

dg2abstrEdge :: DGraphToAGraphEdge,

abstr2dgNode :: AGraphToDGraphNode,

abstr2dgEdge :: AGraphToDGraphEdge,

libname2dg :: LibEnv}

deriving Show

instance PrettyPrint String where

printText0 ga c = ptext (take 25 c)

instance Common.PrettyPrint.PrettyPrint ConversionMaps where

printText0 ga convMaps =

ptext "dg2abstrNode"

Pretty.$$ (printText0 ga $ dg2abstrNode convMaps)

Pretty.$$ ptext "dg2abstrEdge"

Pretty.$$ (printText0 ga $ dg2abstrEdge convMaps)

Pretty.$$ ptext "abstr2dgNode"

Pretty.$$ (printText0 ga $ abstr2dgNode convMaps)

Pretty.$$ ptext "abstr2dgEdge"

Pretty.$$ (printText0 ga $ abstr2dgEdge convMaps)

data GraphMem = GraphMem {

graphInfo :: GraphInfo,

nextGraphId :: Descr}

-- types of the Maps above

type DGraphToAGraphNode = Map.Map (LIB_NAME,Node) Descr

type DGraphToAGraphEdge = Map.Map (LIB_NAME,(Descr,Descr,String)) Descr

type AGraphToDGraphNode = Map.Map Descr (LIB_NAME,Node)

type AGraphToDGraphEdge = Map.Map Descr (LIB_NAME,(Descr,Descr,String))

data InternalNames =

InternalNames { showNames :: Bool,

updater :: [(String,(String -> String) -> IO ())] }

type GInfo = (IORef ProofStatus,

IORef Descr,

IORef ConversionMaps,

Descr,

LIB_NAME,

GraphInfo,

IORef InternalNames, -- show internal names?

HetcatsOpts,

IORef [[Node]]

)

initializeConverter :: IO (IORef GraphMem)

initializeConverter =

do HTk.initHTk [HTk.withdrawMainWin]

showLogicGraph daVinciSort

initGraphInfo <- initgraphs

graphMem <- (newIORef GraphMem{nextGraphId = 0,

graphInfo = initGraphInfo})

return graphMem

{- converts the development graph given by its libname into an abstract graph

and returns the descriptor of the latter, the graphInfo it is contained in

and the conversion maps (see above)-}

convertGraph :: IORef GraphMem -> LIB_NAME -> LibEnv -> HetcatsOpts

-> IO (Descr, GraphInfo, ConversionMaps)

convertGraph graphMem libname libEnv hetsOpts =

do let convMaps = ConversionMaps

{dg2abstrNode = Map.empty::DGraphToAGraphNode,

abstr2dgNode = Map.empty::AGraphToDGraphNode,

dg2abstrEdge = Map.empty::DGraphToAGraphEdge,

abstr2dgEdge = Map.empty::AGraphToDGraphEdge,

libname2dg = libEnv}

case Map.lookup libname libEnv of

Just globContext@(_,_,dgraph) ->

do (abstractGraph,graphInfo,convRef) <-

initializeGraph graphMem libname dgraph convMaps globContext hetsOpts

if (isEmpty dgraph) then

return (abstractGraph, graphInfo,convMaps)

else

do newConvMaps <- convertNodes convMaps abstractGraph

graphInfo dgraph libname

finalConvMaps <- convertEdges newConvMaps abstractGraph

graphInfo dgraph libname

writeIORef convRef finalConvMaps

return (abstractGraph, graphInfo, finalConvMaps)

Nothing -> error ("development graph with libname "

++ (show libname)

++ " does not exist")

{- initializes an empty abstract graph with the needed node and edge types,

return type equals the one of convertGraph -}

initializeGraph :: IORef GraphMem ->LIB_NAME -> DGraph -> ConversionMaps

-> GlobalContext -> HetcatsOpts

-> IO (Descr,GraphInfo,IORef ConversionMaps)

initializeGraph ioRefGraphMem ln dGraph convMaps globContext hetsOpts = do

graphMem <- readIORef ioRefGraphMem

event <- newIORef 0

convRef <- newIORef convMaps

showInternalNames <- newIORef (InternalNames False [])

let proofHistory = Map.fromList [(key,[([]::[DGRule], []::[DGChange])])|

key <- Map.keys (libname2dg convMaps)]

ioRefProofStatus <- newIORef (ln, libname2dg convMaps,proofHistory)

ioRefSubtreeEvents <- newIORef (Map.empty::(Map.Map Descr Descr))

ioRefVisibleNodes <- newIORef [(Graph.nodes dGraph)]

let gid = nextGraphId graphMem

actGraphInfo = graphInfo graphMem

let gInfo = (ioRefProofStatus, event, convRef, gid, ln, actGraphInfo, showInternalNames, hetsOpts, ioRefVisibleNodes)

Result descr _ <-

makegraph ("Development graph for "++show ln)

-- action on "open"

(do currentPath <- getCurrentDirectory

event <- fileDialogStr "Open..." currentPath

maybeFilePath <- sync event

case maybeFilePath of

Just filePath ->

do openProofStatus filePath ioRefProofStatus convRef hetsOpts

Nothing ->

do error ("Could not open file.")

)

-- action on "save"

(do proofStatus <- readIORef ioRefProofStatus

writeShATermFile ("./" ++ (show ln) ++ ".log") proofStatus)

-- action on "save as...:"

(do currentPath <- getCurrentDirectory

event <- newFileDialogStr "Save as..." currentPath

maybeFilePath <- sync event

case maybeFilePath of

Just filePath -> do

proofStatus <- readIORef ioRefProofStatus

writeShATermFile filePath proofStatus

Nothing ->

do error ("Could not save file.")

)

-- the global menu

[GlobalMenu (Menu Nothing

[Menu (Just "Unnamed nodes")

[Button "Hide/show names"

(do (int::InternalNames) <- readIORef showInternalNames

let showThem = not $ showNames int

showIt s = if showThem then s else ""

mapM_ (\(s,upd) -> upd (\_ -> showIt s)) (updater int)

writeIORef showInternalNames (int {showNames = showThem})

redisplay gid actGraphInfo

return () ),

Button "Hide nodes"

(do Result descr _ <- hideSetOfNodeTypes gid

["internal",

"locallyEmpty_internal"]

actGraphInfo

writeIORef event descr

redisplay gid actGraphInfo

return () ),

Button "Show nodes"

(do descr <- readIORef event

showIt gid descr actGraphInfo

redisplay gid actGraphInfo

return () )],

Menu (Just "Proofs")

[Button "Automatic"

(proofMenu gInfo (fmap return . automatic)),

Button "Global Subsumption"

(proofMenu gInfo (fmap return . globSubsume)),

Button "Global Decomposition"

(proofMenu gInfo (fmap return . globDecomp)),

Button "Local Subsumption"

(proofMenu gInfo (fmap return . locSubsume)),

Button "Local Decomposition (merge of rules)"

(proofMenu gInfo (fmap return . locDecomp)),

Button "Hide Theorem Shift"

(proofMenu gInfo (fmap return .

(hideTheoremShift False))),

Button "Theorem Hide Shift"

(proofMenu gInfo (fmap return . theoremHideShift))

]])]

-- the node types

[("spec",

createLocalMenuNodeTypeSpec "Magenta" ioRefSubtreeEvents

actGraphInfo ioRefGraphMem gInfo

),

("locallyEmpty_spec",

createLocalMenuNodeTypeSpec "Violet" ioRefSubtreeEvents

actGraphInfo ioRefGraphMem gInfo

),

("internal",

createLocalMenuNodeTypeInternal "Grey" gInfo

),

("locallyEmpty_internal",

createLocalMenuNodeTypeInternal "LightGrey" gInfo

),

("dg_ref",

createLocalMenuNodeTypeDgRef "SteelBlue" actGraphInfo

ioRefGraphMem graphMem gInfo

),

("locallyEmpty_dg_ref",

createLocalMenuNodeTypeDgRef "LightSteelBlue"

actGraphInfo ioRefGraphMem graphMem gInfo

) ]

-- the link types (share strings to avoid typos)

[("globaldef",

Solid

$$$ createLocalEdgeMenu gInfo

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("def",

Solid $$$ Color "Steelblue"

$$$ createLocalEdgeMenu gInfo

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("hidingdef",

Solid $$$ Color "Lightblue"

$$$ createLocalEdgeMenu gInfo

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("hetdef",

GraphConfigure.Double

$$$ createLocalEdgeMenu gInfo

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("proventhm",

Solid $$$ Color "Green"

$$$ createLocalEdgeMenuThmEdge gInfo

$$$ createLocalMenuValueTitleShowConservativity

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("unproventhm",

Solid $$$ Color "Red"

$$$ createLocalEdgeMenuThmEdge gInfo

$$$ createLocalMenuValueTitleShowConservativity

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("localproventhm",

Dashed $$$ Color "Green"

$$$ createLocalEdgeMenuThmEdge gInfo

$$$ createLocalMenuValueTitleShowConservativity

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("localunproventhm",

Dashed $$$ Color "Red"

$$$ createLocalEdgeMenuThmEdge gInfo

$$$ createLocalMenuValueTitleShowConservativity

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("unprovenhidingthm",

Solid $$$ Color "Orange"

$$$ createLocalEdgeMenuThmEdge gInfo

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

("provenhidingthm",

Solid $$$ Color "Lightgreen"

$$$ createLocalEdgeMenuThmEdge gInfo

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue),

-- > ######### welche Farbe fuer reference ##########

("reference",

Dotted $$$ Color "Grey"

$$$ createLocalEdgeMenu gInfo

$$$ emptyArcTypeParms :: DaVinciArcTypeParms EdgeValue)]

[("globaldef","globaldef","globaldef"),

("globaldef","def","def"),

("globaldef","hetdef","hetdef"),

("globaldef","proventhm","proventhm"),

("globaldef","unproventhm","unproventhm"),

("globaldef","localunproventhm","localunproventhm"),

("def","globaldef","def"),

("def","def","def"),

("def","hetdef","hetdef"),

("def","proventhm","proventhm"),

("def","unproventhm","unproventhm"),

("def","localunproventhm","localunproventhm"),

("hetdef","globaldef","hetdef"),

("hetdef","def","hetdef"),

("hetdef","hetdef","hetdef"),

("hetdef","proventhm","proventhm"),

("hetdef","unproventhm","unproventhm"),

("hetdef","localunproventhm","localunproventhm"),

("proventhm","globaldef","proventhm"),

("proventhm","def","proventhm"),

("proventhm","hetdef","proventhm"),

("proventhm","proventhm","proventhm"),

("proventhm","unproventhm","unproventhm"),

("proventhm","localunproventhm","localunproventhm"),

("unproventhm","globaldef","unproventhm"),

("unproventhm","def","unproventhm"),

("unproventhm","hetdef","unproventhm"),

("unproventhm","proventhm","unproventhm"),

("unproventhm","unproventhm","unproventhm"),

("unproventhm","localunproventhm","localunproventhm"),

("localunproventhm","globaldef","localunproventhm"),

("localunproventhm","def","localunproventhm"),

("localunproventhm","hetdef","localunproventhm"),

("localunproventhm","proventhm","localunproventhm"),

("localunproventhm","unproventhm","localunproventhm"),

("localunproventhm","localunproventhm","localunproventhm")]

actGraphInfo

writeIORef ioRefGraphMem graphMem{nextGraphId = gid+1}

graphMem'<- readIORef ioRefGraphMem

return (descr,graphInfo graphMem',convRef)

openProofStatus :: FilePath -> (IORef ProofStatus) -> (IORef ConversionMaps)

-> HetcatsOpts -> IO()

openProofStatus filename ioRefProofStatus convRef hetsOpts =

do resultProofStatus <- proofStatusFromShATerm filename

case Res.maybeResult resultProofStatus of

Nothing -> error ("Could not read proof status from file '"

++ (show filename) ++ "'")

Just proofStatus@(ln,libEnv',_) ->

do writeIORef ioRefProofStatus proofStatus

initGraphInfo <- initgraphs

graphMem' <- (newIORef GraphMem{nextGraphId = 0,

graphInfo = initGraphInfo})

(gid, actGraphInfo, convMaps)

<- convertGraph graphMem' ln libEnv' hetsOpts

writeIORef convRef convMaps

redisplay gid actGraphInfo

return ()

proofMenu :: GInfo

-> (ProofStatus -> IO (Res.Result ProofStatus))

-> IO ()

proofMenu (ioRefProofStatus, event, convRef, gid, ln, actGraphInfo, _, _, ioRefVisibleNodes) proofFun

= do

proofStatus <- readIORef ioRefProofStatus

Res.Result diags res <- proofFun proofStatus

case res of

Nothing -> do sequence $ map (putStrLn . show) diags

return ()

Just newProofStatus@(ln,libEnv,proofHistory) -> do

let (Just history) = Map.lookup ln proofHistory

(Just newGlobContext) = Map.lookup ln libEnv

writeIORef ioRefProofStatus newProofStatus

descr <- readIORef event

convMaps <- readIORef convRef

(newDescr,convMapsAux)

<- applyChanges gid ln actGraphInfo descr ioRefVisibleNodes

convMaps history

let newConvMaps =

convMapsAux {libname2dg =

Map.insert ln newGlobContext (libname2dg convMapsAux)}

writeIORef event newDescr

writeIORef convRef newConvMaps

redisplay gid actGraphInfo

return ()

proofMenuSef :: GInfo

-> (ProofStatus -> ProofStatus)

-> IO ()

proofMenuSef gInfo proofFun =

proofMenu gInfo (return . return . proofFun)

-- -------------------------------------------------------------

-- methods to create the local menus of the different nodetypes

-- -------------------------------------------------------------

-- local menu for the nodetypes spec and locallyEmpty_spec

createLocalMenuNodeTypeSpec color ioRefSubtreeEvents actGraphInfo

ioRefGraphMem gInfo@(_,_,convRef,_,_,_,_,_,ioRefVisibleNodes) =

Ellipse $$$ Color color

$$$ ValueTitle (\ (s,_,_) -> return s)

$$$ LocalMenu (Menu (Just "node menu")

[createLocalMenuButtonShowSpec gInfo,

createLocalMenuButtonShowNumberOfNode,

createLocalMenuButtonShowSignature gInfo,

createLocalMenuButtonShowTheory gInfo,

createLocalMenuButtonTranslateTheory gInfo,

createLocalMenuTaxonomy gInfo,

createLocalMenuButtonShowSublogic gInfo,

createLocalMenuButtonShowNodeOrigin gInfo,

createLocalMenuButtonProveAtNode gInfo,

createLocalMenuButtonCCCAtNode gInfo,

createLocalMenuButtonShowJustSubtree ioRefSubtreeEvents

convRef ioRefVisibleNodes ioRefGraphMem

actGraphInfo,

createLocalMenuButtonUndoShowJustSubtree ioRefVisibleNodes

ioRefSubtreeEvents actGraphInfo

]) -- ??? Should be globalized somehow

-- >$$$ LocalMenu (Button "xxx" undefined)

$$$ emptyNodeTypeParms

:: DaVinciNodeTypeParms (String,Int,Int)

-- local menu for the nodetypes internal and locallyEmpty_internal

createLocalMenuNodeTypeInternal color

gInfo@(_,_,convRef,_,_,_,showInternalNames,_,_) =

Ellipse $$$ Color color

$$$ ValueTitleSource (\ (s,_,_) -> do

b <- newSimpleBroadcaster ""

int <- readIORef showInternalNames

let upd = (s,applySimpleUpdate b)

writeIORef showInternalNames (int {updater = upd:updater int})

return $ toSimpleSource b)

$$$ LocalMenu (Menu (Just "node menu")

[createLocalMenuButtonShowSpec gInfo,

createLocalMenuButtonShowNumberOfNode,

createLocalMenuButtonShowSignature gInfo,

createLocalMenuButtonShowTheory gInfo,

createLocalMenuButtonTranslateTheory gInfo,

createLocalMenuTaxonomy gInfo,

createLocalMenuButtonShowSublogic gInfo,

createLocalMenuButtonProveAtNode gInfo,

createLocalMenuButtonCCCAtNode gInfo,

createLocalMenuButtonShowNodeOrigin gInfo])

$$$ emptyNodeTypeParms

:: DaVinciNodeTypeParms (String,Int,Int)

-- local menu for the nodetypes dg_ref and locallyEmpty_dg_ref

createLocalMenuNodeTypeDgRef color actGraphInfo

ioRefGraphMem graphMem (_,_,convRef,_,_,_,_,hetsOpts,_) =

Box $$$ Color color

$$$ ValueTitle (\ (s,_,_) -> return s)

$$$ LocalMenu (Button "Show referenced library"

(\ (name,descr,gid) ->

do convMaps <- readIORef convRef

(refDescr, newGraphInfo, refConvMaps) <-

showReferencedLibrary ioRefGraphMem descr

gid

actGraphInfo

convMaps

hetsOpts

--writeIORef convRef newConvMaps

writeIORef ioRefGraphMem

graphMem{graphInfo = newGraphInfo,

nextGraphId = refDescr +1}

redisplay refDescr newGraphInfo

return ()

))

$$$ emptyNodeTypeParms

:: DaVinciNodeTypeParms (String,Int,Int)

-- menu button for local menus

createMenuButton title menuFun (ioProofStatus,_,convRef,_,_,_,_,_,_) =

(Button title

(\ (name,descr,gid) ->

do convMaps <- readIORef convRef

(ln,libEnv,_) <- readIORef ioProofStatus

let (Just (_,_,dGraph)) = Map.lookup ln libEnv

menuFun descr

(abstr2dgNode convMaps)

dGraph

return ()

)

)

createLocalMenuButtonShowSpec = createMenuButton "Show spec" showSpec

createLocalMenuButtonShowSignature =

createMenuButton "Show signature" getSignatureOfNode

createLocalMenuButtonShowTheory gInfo =

createMenuButton "Show theory" (getTheoryOfNode gInfo) gInfo

createLocalMenuButtonTranslateTheory gInfo =

createMenuButton "Translate theory" (translateTheoryOfNode gInfo) gInfo

{- |

create a sub Menu for taxonomy visualisation

(added by KL)

-}

--createLocalMenuTaxonomy :: IORef ProofStatus -> Descr -> AGraphToDGraphNode ->

-- DGraph -> IO ()

createLocalMenuTaxonomy ginfo@(proofStatus,_,_,_,_,_,_,_,_) =

(Menu (Just "Taxonomy graphs")

[createMenuButton "Subsort graph"

(passTh displaySubsortGraph) ginfo,

createMenuButton "Concept graph"

(passTh displayConceptGraph) ginfo])

where passTh displayFun descr ab2dgNode dgraph =

do r <- lookupTheoryOfNode proofStatus

descr ab2dgNode dgraph

case r of

Res.Result [] (Just (n, gth)) ->

displayFun (showPretty n "") gth

Res.Result diags _ ->

showDiags defaultHetcatsOpts diags

createLocalMenuButtonShowSublogic gInfo@(proofStatus,_,_,_,_,_,_,_,_) =

createMenuButton "Show sublogic" (getSublogicOfNode proofStatus) gInfo

createLocalMenuButtonShowNodeOrigin =

createMenuButton "Show origin" showOriginOfNode

createLocalMenuButtonProveAtNode gInfo =

createMenuButton "Prove" (proveAtNode False gInfo) gInfo

createLocalMenuButtonCCCAtNode gInfo =

createMenuButton "Check consistency" (proveAtNode True gInfo) gInfo

createLocalMenuButtonShowJustSubtree ioRefSubtreeEvents convRef

ioRefVisibleNodes ioRefGraphMem actGraphInfo =

(Button "Show just subtree"

(\ (name,descr,gid) ->

do subtreeEvents <- readIORef ioRefSubtreeEvents

case Map.lookup descr subtreeEvents of

Just _ -> putStrLn

("it is already just the subtree of node "

++ (show descr) ++" shown")

Nothing ->

do convMaps <- readIORef convRef

visibleNodes <- readIORef ioRefVisibleNodes

(eventDescr,newVisibleNodes,errorMsg) <-

showJustSubtree ioRefGraphMem

descr gid convMaps visibleNodes

case errorMsg of

Nothing -> do let newSubtreeEvents =

Map.insert descr

eventDescr

subtreeEvents

writeIORef ioRefSubtreeEvents

newSubtreeEvents

writeIORef ioRefVisibleNodes

newVisibleNodes

redisplay gid actGraphInfo

return()

Just text -> do putStrLn text

return()

)

)

createLocalMenuButtonUndoShowJustSubtree ioRefVisibleNodes

ioRefSubtreeEvents actGraphInfo =

(Button "Undo show just subtree"

(\ (name,descr,gid) ->

do visibleNodes <- readIORef ioRefVisibleNodes

case (tail visibleNodes) of

[] -> do putStrLn

"Complete graph is already shown"

return()

newVisibleNodes@(x:xs) ->

do subtreeEvents <- readIORef ioRefSubtreeEvents

case Map.lookup descr subtreeEvents of

Just hide_event ->

do showIt gid hide_event actGraphInfo

writeIORef ioRefSubtreeEvents

(Map.delete descr subtreeEvents)

writeIORef ioRefVisibleNodes

newVisibleNodes

redisplay gid actGraphInfo

return ()

Nothing -> do putStrLn "undo not possible"

return()

)

)

-- for debugging

createLocalMenuButtonShowNumberOfNode =

(Button "Show number of node"

(\ (name, descr, gid) ->

getNumberOfNode descr))

-- -------------------------------------------------------------

-- methods to create the local menus for the edges

-- -------------------------------------------------------------

createLocalEdgeMenu gInfo =

LocalMenu (Menu (Just "edge menu")

[createLocalMenuButtonShowMorphismOfEdge gInfo,

createLocalMenuButtonShowOriginOfEdge gInfo,

createLocalMenuButtonCheckconsistencyOfEdge gInfo]

)

createLocalEdgeMenuThmEdge gInfo =

LocalMenu (Menu (Just "thm egde menu")

[createLocalMenuButtonShowMorphismOfEdge gInfo,

createLocalMenuButtonShowOriginOfEdge gInfo,

createLocalMenuButtonShowProofStatusOfThm gInfo,

createLocalMenuButtonCheckconsistencyOfEdge gInfo]

)

createLocalMenuButtonShowMorphismOfEdge _ =

(Button "Show morphism"

(\ (_,descr,maybeLEdge) ->

do showMorphismOfEdge descr maybeLEdge

return ()

))

createLocalMenuButtonShowOriginOfEdge _ =

(Button "Show origin"

(\ (_,descr,maybeLEdge) ->

do showOriginOfEdge descr maybeLEdge

return ()

))

createLocalMenuButtonCheckconsistencyOfEdge gInfo =

(Button "Check conservativity (preliminary)"

(\ (ginfo,descr,maybeLEdge) ->

do checkconsistencyOfEdge descr gInfo maybeLEdge

return ()

))

createLocalMenuButtonShowProofStatusOfThm _ =

(Button "Show proof status"

(\ (_,descr,maybeLEdge) ->

do showProofStatusOfThm descr maybeLEdge

return ()

))

createLocalMenuValueTitleShowConservativity =

(ValueTitle

(\ (_,_,maybeLEdge) ->

case maybeLEdge of

Just (_,_,edgelab) ->

case dgl_type edgelab of

GlobalThm _ c status -> return (showCons c status)

LocalThm _ c status -> return (showCons c status)

_ -> return ""

Nothing -> return ""

))

where

showCons :: Conservativity -> ThmLinkStatus -> String

showCons c status =

case (c,status) of

(None,_) -> show c

(_,Open) -> (show c) ++ "?"

_ -> show c

-- ------------------------------

-- end of local menu definitions

-- ------------------------------

showSpec descr convMap dgraph =

case Map.lookup descr convMap of

Nothing -> return ()

Just (libname,node) -> do

let sp = dgToSpec dgraph node

putStrLn (showPretty sp "")

{- auxiliary method for debugging. shows the number of the given node in the abstraction graph -}

getNumberOfNode :: Descr -> IO()

getNumberOfNode descr =

let title = "Number of node"

in createTextDisplay title (showPretty descr "") [size(10,10)]

{- outputs the signature of a node in a window;

used by the node menu defined in initializeGraph-}

getSignatureOfNode :: Descr -> AGraphToDGraphNode -> DGraph -> IO()

getSignatureOfNode descr ab2dgNode dgraph =

case Map.lookup descr ab2dgNode of

Just (libname, node) ->

do let dgnode = lab' (context dgraph node)

case dgnode of

(DGNode name (G_sign _ sig) _ _ _ _) ->

let title = "Signature of "++showName name

in createTextDisplay title (showPretty sig "") [size(80,50)]

(DGRef _ _ _ _ _) -> error

"nodes of type dg_ref do not have a signature"

Nothing -> error ("node with descriptor "

++ (show descr)

++ " has no corresponding node in the development graph")

{- |

fetches the theory from a node inside the IO Monad

(added by KL based on code in getTheoryOfNode) -}

lookupTheoryOfNode :: IORef ProofStatus -> Descr -> AGraphToDGraphNode ->

DGraph -> IO (Res.Result (Node,G_theory))

lookupTheoryOfNode proofStatusRef descr ab2dgNode dgraph = do

(_,libEnv,_) <- readIORef proofStatusRef

case (do

(_libname, node) <-

Res.maybeToResult nullPos ("Node "++show descr++" not found")

$ Map.lookup descr ab2dgNode

gth <- computeTheory libEnv dgraph node

return (node, gth)

) of

r -> return r

{- outputs the theory of a node in a window;

used by the node menu defined in initializeGraph-}

getTheoryOfNode :: GInfo -> Descr -> AGraphToDGraphNode ->

DGraph -> IO()

getTheoryOfNode (proofStatusRef,_,_,_,_,_,_,hetsOpts,_) descr ab2dgNode dgraph = do

r <- lookupTheoryOfNode proofStatusRef descr ab2dgNode dgraph

case r of

Res.Result diags res -> do

showDiags hetsOpts diags

case res of

(Just (n, gth)) -> displayTheory "Theory" n dgraph gth

_ -> return ()

printTheory :: G_theory -> String

printTheory (G_theory lid sign sens) =

let shownsens = concatMap ((flip shows "\n\n") .

print_named lid emptyGlobalAnnos) sens

in showPretty sign "\n\n\n" ++ shownsens

displayTheory :: String -> Node -> DGraph -> G_theory

-> IO ()

displayTheory ext node dgraph gth =

let dgnode = lab' (context dgraph node)

str = printTheory (simplifyTh gth) in case dgnode of

(DGNode name (G_sign _ _) _ _ _ _) ->

let thname = showName name

title = ext ++ " of " ++ thname

in createTextSaveDisplay title (thname++".het") str [size(100,50)]

(DGRef _ _ _ _ _) -> error

"nodes of type dg_ref do not have a theory"

{- translate the theory of a node in a window;

used by the node menu defined in initializeGraph-}

translateTheoryOfNode :: GInfo -> Descr -> AGraphToDGraphNode ->

DGraph -> IO()

translateTheoryOfNode gInfo@(proofStatusRef,_,_,_,_,_,_,opts,_) descr ab2dgNode dgraph = do

(_,libEnv,_) <- readIORef proofStatusRef

case (do

(_libname, node) <-

Res.maybeToResult nullPos ("Node "++show descr++" not found")

$ Map.lookup descr ab2dgNode

th <- computeTheory libEnv dgraph node

return (node,th) ) of

Res.Result [] (Just (node,th)) -> do

Res.Result diags _ <- Res.ioresToIO(

do G_theory lid sign sens <- return th

-- find all comorphism paths starting from lid

let paths = findComorphismPaths logicGraph (sublogicOfTh th)

-- let the user choose one

sel <- Res.ioToIORes $ listBox "Choose a logic translation"

(map show paths)

i <- case sel of

Just j -> return j

_ -> Res.resToIORes $ Res.fatal_error "" nullPos

Comorphism cid <- return (paths!!i)

-- adjust lid's

let lidS = sourceLogic cid

lidT = targetLogic cid

sign' <- coerce lidS lid sign

sens' <- coerce lidS lid sens

-- translate theory along chosen comorphism

(sign'',sens1) <-

Res.resToIORes $ map_theory cid (sign',sens')

Res.ioToIORes $ displayTheory "Translated theory" node dgraph

(G_theory lidT sign'' sens1)

)

showDiags opts diags

return ()

Res.Result diags _ -> showDiags opts diags

{- outputs the sublogic of a node in a window;

used by the node menu defined in initializeGraph-}

getSublogicOfNode :: IORef ProofStatus -> Descr -> AGraphToDGraphNode -> DGraph -> IO()

getSublogicOfNode proofStatusRef descr ab2dgNode dgraph = do

(_,libEnv,_) <- readIORef proofStatusRef

case Map.lookup descr ab2dgNode of

Just (libname, node) ->

let dgnode = lab' (context dgraph node)

name = case dgnode of

(DGNode name _ _ _ _ _) -> name

_ -> emptyName

in case computeTheory libEnv dgraph node of

Res.Result _ (Just th) ->

let logstr = show $ sublogicOfTh th

title = "Sublogic of "++showName name

in createTextDisplay title logstr [size(30,10)]

Res.Result diags _ ->

error ("Could not compute theory for sublogic computation: "++

concatMap show diags)

Nothing -> error ("node with descriptor "

++ (show descr)

++ " has no corresponding node in the development graph")

{- prints the origin of the node -}

showOriginOfNode :: Descr -> AGraphToDGraphNode -> DGraph -> IO()

showOriginOfNode descr ab2dgNode dgraph =

case Map.lookup descr ab2dgNode of

Just (libname, node) ->

do let dgnode = lab' (context dgraph node)

case dgnode of

DGNode name _ _ _ _ orig ->

let title = "Origin of node "++showName name

in createTextDisplay title

(showPretty orig "") [size(30,10)]

DGRef _ _ _ _ _ -> error "showOriginOfNode: no DGNode"

Nothing -> error ("node with descriptor "

++ (show descr)

++ " has no corresponding node in the development graph")

{- start local theorem proving or consistency checking at a node -}

--proveAtNode :: Bool -> Descr -> AGraphToDGraphNode -> DGraph -> IO()

proveAtNode checkCons gInfo@(_,_,convRef,_,_,_,_,_,_) descr ab2dgNode dgraph =

case Map.lookup descr ab2dgNode of

Just libNode ->

do convMaps <- readIORef convRef

proofMenu gInfo (basicInferenceNode checkCons logicGraph libNode)

Nothing -> error ("node with descriptor "

++ (show descr)

++ " has no corresponding node in the development graph")

{- prints the morphism of the edge -}

showMorphismOfEdge :: Descr -> Maybe (LEdge DGLinkLab) -> IO()

showMorphismOfEdge _ (Just (_,_,linklab)) =

createTextDisplay "Signature morphism"

((showPretty (dgl_morphism linklab) "")++hidingMorph) [size(150,50)]

where

hidingMorph = case (dgl_type linklab) of

(HidingThm morph _) -> "\n ++++++ \n"

++ (showPretty morph "")

_ -> ""

showMorphismOfEdge descr Nothing =

createTextDisplay "Error"

("edge "++(show descr)++" has no corresponding edge"

++ "in the development graph") [size(30,10)]

{- prints the origin of the edge -}

showOriginOfEdge :: Descr -> Maybe (LEdge DGLinkLab) -> IO()

showOriginOfEdge _ (Just (_,_,linklab)) =

createTextDisplay "Origin of link"

(showPretty (dgl_origin linklab) "") [size(30,10)]

showOriginOfEdge descr Nothing =

createTextDisplay "Error"

("edge "++(show descr)++" has no corresponding edge"

++ "in the development graph") [size(30,10)]

{- prints the proof base of the edge -}

showProofStatusOfThm :: Descr -> Maybe (LEdge DGLinkLab) -> IO()

showProofStatusOfThm _ (Just ledge) =

createTextDisplay "Proof Status"

(show (getProofStatusOfThm ledge)) [size(30,10)]

showProofStatusOfThm descr Nothing =

putStrLn ("edge "++(show descr)++" has no corresponding edge"

++ "in the development graph")

{- check consistency of the edge -}

checkconsistencyOfEdge :: Descr -> GInfo -> Maybe (LEdge DGLinkLab) -> IO()

checkconsistencyOfEdge _ (ref,_,_,_,_,_,_,opts,_)

(Just (source,target,linklab)) = do

(ln,libEnv,_) <- readIORef ref

let (_,_,dgraph) = maybe (error "checkconsistencyOfEdge") id

$ Map.lookup ln libEnv

dgtar = lab' (context dgraph target)

case dgtar of

DGNode name _ (G_l_sentence_list lid sens) _ _ _ ->

case dgl_morphism linklab of

GMorphism cid sign1 morphism2 -> do

let morphism2' = case coerce (targetLogic cid) lid morphism2 of

Just m -> m

_ -> error "checkconsistencyOfEdge: wrong logic"

let th = case computeTheory libEnv dgraph source of

Res.Result _ (Just th1) -> th1

_ -> error "checkconsistencyOfEdge: computeTheory"

G_theory lid1 sign1 sens1 <- return th

case coerce lid1 lid (sign1,sens1) of

Just (sign2, sens2) ->

let Res.Result diags res =

consCheck lid (sign2,sens2) morphism2' sens

showRes = case res of

Just(Just True) -> "The link is conservative"

Just(Just False) -> "The link is not conservative"

_ -> "Could not determine whether link is conservative"

showDiags = unlines (map show diags)

in createTextDisplay "Result of consistency check"

(showRes++"\n"++showDiags) [size(50,50)]

_ -> error "checkconsistencyOfEdge: wrong logic"

DGRef _ _ _ _ _ -> error "checkconsistencyOfEdge: no DGNode"

checkconsistencyOfEdge descr _ Nothing =

createTextDisplay "Error"

("edge " ++ show descr ++ " has no corresponding edge "

++ "in the development graph") [size(30,10)]

getProofStatusOfThm :: (LEdge DGLinkLab) -> ThmLinkStatus

getProofStatusOfThm (_,_,label) =

case (dgl_type label) of

(LocalThm proofStatus _ _) -> proofStatus

(GlobalThm proofStatus _ _) -> proofStatus

(HidingThm _ proofStatus) -> proofStatus -- richtig?

-- (FreeThm GMorphism Bool) - keinen proofStatus?

_ -> error "the given edge is not a theorem"

{- converts the nodes of the development graph, if it has any,

and returns the resulting conversion maps

if the graph is empty the conversion maps are returned unchanged-}

convertNodes :: ConversionMaps -> Descr -> GraphInfo -> DGraph

-> LIB_NAME -> IO ConversionMaps

convertNodes convMaps descr graphInfo dgraph libname

| isEmpty dgraph = do return convMaps

| otherwise = convertNodesAux convMaps

descr

graphInfo

(labNodes dgraph)

libname

{- auxiliar function for convertNodes if the given list of nodes is

emtpy, it returns the conversion maps unchanged otherwise it adds the

converted first node to the abstract graph and to the affected

conversion maps and afterwards calls itself with the remaining node

list -}

convertNodesAux :: ConversionMaps -> Descr -> GraphInfo ->

[LNode DGNodeLab] -> LIB_NAME -> IO ConversionMaps

convertNodesAux convMaps descr graphInfo [] libname = return convMaps

convertNodesAux convMaps descr graphInfo ((node,dgnode):lNodes) libname =

do let nodetype = getDGNodeType dgnode

Result newDescr err <- addnode descr

nodetype

(getDGNodeName dgnode)

graphInfo

convertNodesAux convMaps {dg2abstrNode = Map.insert (libname, node)

newDescr (dg2abstrNode convMaps),

abstr2dgNode = Map.insert newDescr

(libname, node) (abstr2dgNode convMaps)}

descr graphInfo lNodes libname

-- | gets the type of a development graph edge as a string

getDGNodeType :: DGNodeLab -> String

getDGNodeType dgnode =

(if locallyEmpty dgnode then "locallyEmpty_" else "")

++ case isDGRef dgnode of

True -> "dg_ref"

False -> if isInternalNode dgnode

then "internal"

else "spec"

getDGLinkType :: DGLinkLab -> String

getDGLinkType lnk = case dgl_type lnk of

GlobalDef ->

if hasIdComorphism $ dgl_morphism lnk then "globaldef"

else "hetdef"

HidingDef -> "hidingdef"

LocalThm thmLinkStatus _ _ -> "local" ++ getThmType thmLinkStatus ++ "thm"

GlobalThm thmLinkStatus _ _ -> getThmType thmLinkStatus ++ "thm"

HidingThm _ thmLinkStatus -> getThmType thmLinkStatus ++ "hidingthm"

FreeThm _ bool -> if bool then "proventhm" else "unproventhm"

_ -> "def" -- LocalDef, FreeDef, CofreeDef

getThmType :: ThmLinkStatus -> String

getThmType thmLinkStatus =

case thmLinkStatus of

Proven _ -> "proven"

Open -> "unproven"

{- converts the edges of the development graph

works the same way as convertNods does-}

convertEdges :: ConversionMaps -> Descr -> GraphInfo -> DGraph

-> LIB_NAME -> IO ConversionMaps

convertEdges convMaps descr graphInfo dgraph libname

| isEmpty dgraph = do return convMaps

| otherwise = convertEdgesAux convMaps

descr

graphInfo

(labEdges dgraph)

libname

{- auxiliar function for convertEges --> not yet implemented! -}

convertEdgesAux :: ConversionMaps -> Descr -> GraphInfo ->

[LEdge DGLinkLab] -> LIB_NAME -> IO ConversionMaps

convertEdgesAux convMaps descr graphInfo [] libname = return convMaps

convertEdgesAux convMaps descr graphInfo ((ledge@(src,tar,edgelab)):lEdges)

libname =

do let srcnode = Map.lookup (libname,src) (dg2abstrNode convMaps)

tarnode = Map.lookup (libname,tar) (dg2abstrNode convMaps)

case (srcnode,tarnode) of

(Just s, Just t) -> do

Result newDescr err <- addlink descr (getDGLinkType edgelab)

"" (Just ledge) s t graphInfo

newConvMaps <- (convertEdgesAux

convMaps {dg2abstrEdge = Map.insert

(libname, (src,tar,show edgelab))

newDescr

(dg2abstrEdge convMaps),

abstr2dgEdge = Map.insert newDescr

(libname, (src,tar,show edgelab))

(abstr2dgEdge convMaps)}

descr graphInfo lEdges libname)

return newConvMaps

_ -> error "Cannot find nodes"

showReferencedLibrary :: IORef GraphMem -> Descr -> Descr -> GraphInfo

-> ConversionMaps -> HetcatsOpts -> IO (Descr, GraphInfo, ConversionMaps)

showReferencedLibrary graphMem descr abstractGraph graphInfo convMaps hetsOpts =

case Map.lookup descr (abstr2dgNode convMaps) of

Just (libname,node) ->

case Map.lookup libname libname2dgMap of

Just (_,_,dgraph) ->

do let (_,(DGRef _ refLibname refNode _ _)) =

labNode' (context dgraph node)

case Map.lookup refLibname libname2dgMap of

Just (_,refDgraph,_) ->

convertGraph graphMem refLibname (libname2dg convMaps) hetsOpts

Nothing -> error ("The referenced library ("

++ (show refLibname)

++ ") is unknown")

Nothing ->

error ("Selected node belongs to unknown library: "

++ (show libname))

Nothing ->

error ("there is no node with the descriptor "

++ show descr)

where libname2dgMap = libname2dg convMaps

showJustSubtree:: IORef GraphMem -> Descr -> Descr -> ConversionMaps

-> [[Node]]-> IO (Descr, [[Node]], Maybe String)

showJustSubtree ioRefGraphMem descr abstractGraph convMaps visibleNodes =

case Map.lookup descr (abstr2dgNode convMaps) of

Just (libname,parentNode) ->

case Map.lookup libname libname2dgMap of

Just (_,_,dgraph) ->

do let allNodes = getNodeDescriptors (head visibleNodes)

libname convMaps

dgNodesOfSubtree = nub (parentNode:(getNodesOfSubtree dgraph

(head visibleNodes) parentNode))

-- the selected node (parentNode) shall not be hidden either,

-- and we already know its descriptor (descr)

nodesOfSubtree = getNodeDescriptors dgNodesOfSubtree

libname convMaps

nodesToHide = filter (notElemR nodesOfSubtree) allNodes

graphMem <- readIORef ioRefGraphMem

(Result eventDescr errorMsg) <- hidenodes abstractGraph

nodesToHide (graphInfo graphMem)

return (eventDescr, (dgNodesOfSubtree:visibleNodes), errorMsg)

{- case errorMsg of

Just text -> return (-1,text)

Nothing -> return (eventDescr,

return convMaps-}

Nothing -> error

("showJustSubtree: Selected node belongs to unknown library: "

++ (show libname))

Nothing ->

error ("showJustSubtree: there is no node with the descriptor "

++ show descr)

where libname2dgMap = libname2dg convMaps

getNodeDescriptors :: [Node] -> LIB_NAME -> ConversionMaps -> [Descr]

getNodeDescriptors [] _ _ = []

getNodeDescriptors (node:nodelist) libname convMaps =

case Map.lookup (libname,node) (dg2abstrNode convMaps) of

Just descr -> descr:(getNodeDescriptors nodelist libname convMaps)

Nothing -> error ("getNodeDescriptors: There is no descriptor for dgnode "

++ (show node))

getNodesOfSubtree :: DGraph -> [Node] -> Node -> [Node]

getNodesOfSubtree dgraph visibleNodes node =

(concat (map (getNodesOfSubtree dgraph remainingVisibleNodes) predOfNode))

++predOfNode

where predOfNode =

[n| n <- (pre dgraph node), elem n visibleNodes]

remainingVisibleNodes = [n| n <- visibleNodes, notElem n predOfNode]

elemR :: Eq a => [a] -> a -> Bool

elemR list element = elem element list

notElemR :: Eq a => [a] -> a -> Bool

notElemR list element = notElem element list

-- -- ################ einbindung von proofs.hs ############

applyChanges :: Descr -> LIB_NAME -> GraphInfo -> Descr -> IORef [[Node]]

-> ConversionMaps

-> [([DGRule],[DGChange])]

-> IO (Descr, ConversionMaps)

applyChanges gid libname graphInfo eventDescr ioRefVisibleNodes

convMaps history =

case history of

[] -> return (eventDescr, convMaps)

(historyElem:list) ->

case snd historyElem of

[] -> return (eventDescr, convMaps)

changes@(x:xs) -> do

visibleNodes <- readIORef ioRefVisibleNodes

(newVisibleNodes, newEventDescr, newConvMaps) <-

applyChangesAux gid libname graphInfo visibleNodes

eventDescr convMaps changes

writeIORef ioRefVisibleNodes newVisibleNodes

return (newEventDescr, newConvMaps)

applyChangesAux :: Descr -> LIB_NAME -> GraphInfo -> [[Node]] -> Descr

-> ConversionMaps -> [DGChange]

-> IO ([[Node]], Descr, ConversionMaps)

applyChangesAux _ _ _ visibleNodes eventDescr convMaps [] =

return (visibleNodes, eventDescr+1, convMaps)

applyChangesAux gid libname graphInfo visibleNodes eventDescr

convMaps (change:changes) =

case change of

InsertNode lnode@(node,nodelab) -> do

let nodetype = getDGNodeType nodelab

nodename = getDGNodeName nodelab

(Result descr err) <-

addnode gid nodetype nodename graphInfo

case err of

Nothing ->

do let dgNode = (libname,node)

newVisibleNodes = map (insertElem node) visibleNodes

newConvMaps =

convMaps {dg2abstrNode =

Map.insert dgNode descr (dg2abstrNode convMaps),

abstr2dgNode =

Map.insert descr dgNode (abstr2dgNode convMaps)}

applyChangesAux gid libname graphInfo newVisibleNodes (descr+1)

newConvMaps changes

Just msg ->

error ("applyChangesAux: could not add node " ++ (show node)

++" with name " ++ (show (nodename)) ++ "\n"

++ msg)

DeleteNode lnode@(node,nodelab) -> do

let nodename = getDGNodeName nodelab

dgnode = (libname,node)

case Map.lookup dgnode (dg2abstrNode convMaps) of

Just abstrNode -> do

(Result descr err) <- delnode gid abstrNode graphInfo

case err of

Nothing -> do

let newVisibleNodes = map (removeElem node) visibleNodes

newConvMaps =

convMaps {dg2abstrNode =

Map.delete dgnode (dg2abstrNode convMaps),

abstr2dgNode =

Map.delete abstrNode (abstr2dgNode convMaps)}

applyChangesAux gid libname graphInfo newVisibleNodes (descr+1)

newConvMaps changes

Just msg -> error ("applyChangesAux: could not delete node "

++ (show node) ++ " with name "

++ (show nodename) ++ "\n"

++ msg)

Nothing -> error ("applyChangesAux: could not delte node "

++ (show node) ++ " with name "

++ (show nodename) ++": " ++

"node does not exist in abstraction graph")

InsertEdge ledge@(src,tgt,edgelab) ->

do let dg2abstrNodeMap = dg2abstrNode convMaps

case (Map.lookup (libname,src) dg2abstrNodeMap,

Map.lookup (libname,tgt) dg2abstrNodeMap) of

(Just abstrSrc, Just abstrTgt) ->

do let dgEdge = (libname, (src,tgt,show edgelab))

(Result descr err) <-

addlink gid (getDGLinkType edgelab)

"" (Just ledge) abstrSrc abstrTgt graphInfo

case err of

Nothing ->

do let newConvMaps = convMaps

{dg2abstrEdge =

Map.insert dgEdge descr (dg2abstrEdge convMaps),

abstr2dgEdge =

Map.insert descr dgEdge (abstr2dgEdge convMaps)}

applyChangesAux gid libname graphInfo visibleNodes

(descr+1) newConvMaps changes

Just msg ->

error ("applyChangesAux: could not add link from "

++ (show src) ++ " to " ++ (show tgt) ++ ":\n"

++ (show msg))

_ ->

error ("applyChangesAux: could not add link " ++ (show src)

++ " to " ++ (show tgt) ++ ": illigal end nodes")

DeleteEdge (src,tgt,edgelab) ->

do let dgEdge = (libname, (src,tgt,show edgelab))

dg2abstrEdgeMap = dg2abstrEdge convMaps

case Map.lookup dgEdge dg2abstrEdgeMap of

Just abstrEdge ->

do (Result descr err) <- dellink gid abstrEdge graphInfo

case err of

Nothing ->

do let newConvMaps = convMaps

{dg2abstrEdge =

Map.delete dgEdge dg2abstrEdgeMap,

abstr2dgEdge =

Map.delete abstrEdge (abstr2dgEdge

convMaps)}

applyChangesAux gid libname graphInfo visibleNodes

(descr+1) newConvMaps changes

Just msg -> error ("applyChangesAux: could not delete edge "

++ (show abstrEdge) ++ ":\n"

++msg)

Nothing -> error ("applyChangesAux: deleted edge from "

++ (show src) ++ " to " ++ (show tgt)

++ " of type " ++ (show (dgl_type edgelab))

++ " and origin " ++ (show (dgl_origin edgelab))

++ " of development "

++ "graph does not exist in abstraction graph")

removeElem :: Eq a => a -> [a] -> [a]

removeElem element list = [e | e <- list, e /= element]

insertElem :: a -> [a] -> [a]

insertElem element list = element:list