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leksah-0.6.0: src/IDE/Pane/PackageEditor.hs

{-# OPTIONS_GHC -XScopedTypeVariables -XDeriveDataTypeable -XMultiParamTypeClasses
    -XTypeSynonymInstances #-}
-----------------------------------------------------------------------------
--
-- Module      :  IDE.Pane.PackageEditor
-- Copyright   :  (c) Juergen Nicklisch-Franken, Hamish Mackenzie
-- License     :  GNU-GPL
--
-- Maintainer  :  Juergen Nicklisch-Franken <info@leksah.org>
-- Stability   :  provisional
-- Portability :  portable
--
-- | Module for editing of cabal packages and build infos
--
-----------------------------------------------------------------------------------


module IDE.Pane.PackageEditor (
    packageNew'
,   packageEdit
,   choosePackageDir
,   choosePackageFile

,   hasConfigs
) where

import Graphics.UI.Gtk
import Control.Monad.Reader
import Distribution.Package
import Distribution.PackageDescription
import Distribution.Verbosity
import System.FilePath
import Data.List
import Data.Maybe
import System.Directory

import IDE.Core.State
import IDE.FileUtils
import Graphics.UI.Editor.MakeEditor
import Distribution.PackageDescription.Parse (readPackageDescription,writePackageDescription)
import Distribution.PackageDescription.Configuration (flattenPackageDescription)
import Distribution.ModuleName(ModuleName)
import Data.Typeable (Typeable(..))
import Debug.Trace (trace)
import qualified Distribution.InstalledPackageInfo as IPI (package)
import Graphics.UI.Editor.Composite
    (versionEditor,
     versionRangeEditor,
     dependenciesEditor,
     stringsEditor,
     filesEditor,
     tupel3Editor,
     eitherOrEditor,
     maybeEditor,
     pairEditor,
     ColumnDescr(..),
     multisetEditor)
import Distribution.Text (simpleParse, display)
import MyMissing
import Graphics.UI.Editor.Parameters
    (paraInnerPadding,
     paraInnerAlignment,
     paraOuterPadding,
     paraOuterAlignment,
     Parameter(..),
     paraPack,
     Direction(..),
     paraDirection,
     paraMinSize,
     paraShadow,
     paraSynopsis,
     (<<<-),
     emptyParams,
     paraName,
     getParameterPrim)
import Graphics.UI.Editor.Simple
    (staticListMultiEditor,
     intEditor,
     boolEditor,
     fileEditor,
     comboSelectionEditor,
     multilineStringEditor,
     stringEditor)
import Distribution.License (License(..))
import IDE.Metainfo.GHCUtils (inGhc,getInstalledPackageInfos)
import Graphics.UI.Editor.Basics (Editor(..))
import Distribution.Compiler
    (CompilerFlavor(..))
import Distribution.Simple
    (knownExtensions,
     Extension(..),
     VersionRange(..))
import Distribution.Version
    (VersionRange(..))
import Default (Default(..))
import Packages (PackageConfig(..))

-- ---------------------------------------------------------------------
-- The exported stuff goes here
--

choosePackageDir :: Window -> IO (Maybe FilePath)
choosePackageDir window = do
    dialog <- fileChooserDialogNew
                    (Just $ "Select root folder for project")
                    (Just window)
                FileChooserActionSelectFolder
                [("gtk-cancel"
                ,ResponseCancel)
                ,("gtk-open"
                ,ResponseAccept)]
    widgetShow dialog
    response <- dialogRun dialog
    case response of
        ResponseAccept -> do
            fn <- fileChooserGetFilename dialog
            widgetDestroy dialog
            return fn
        ResponseCancel -> do
            widgetDestroy dialog
            return Nothing
        ResponseDeleteEvent -> do
            widgetDestroy dialog
            return Nothing
        _                   -> return Nothing

choosePackageFile :: Window -> IO (Maybe FilePath)
choosePackageFile window = do
    dialog <- fileChooserDialogNew
                    (Just $ "Select .cabal project file")
                    (Just window)
                FileChooserActionOpen
                [("gtk-cancel"
                ,ResponseCancel)
                ,("gtk-open"
                ,ResponseAccept)]
    widgetShow dialog
    response <- dialogRun dialog
    case response of
        ResponseAccept -> do
            fn <- fileChooserGetFilename dialog
            widgetDestroy dialog
            return fn
        ResponseCancel -> do
            widgetDestroy dialog
            return Nothing
        ResponseDeleteEvent -> do
            widgetDestroy dialog
            return Nothing
        _                   -> return Nothing

packageEdit :: IDEAction
packageEdit = do
    mbActivePackage <- readIDE activePack
    case mbActivePackage of
        Nothing -> sysMessage Normal "No active package to edit"
        Just idePackage -> do
            let dirName = dropFileName (cabalFile idePackage)
            modules <- liftIO $ allModules dirName
            package <- liftIO $ readPackageDescription normal (cabalFile idePackage)
            if hasConfigs package
                then do
                    ideMessage High ("Cabal file with configurations can't be edited with the "
                        ++ "current version of the editor")
                    return ()
                else do
                    editPackage (flattenPackageDescription package) dirName  modules (\ _ -> return ())
                    return ()

hasConfigs :: GenericPackageDescription -> Bool
hasConfigs gpd =
    let libConds = case condLibrary gpd of
                        Nothing -> False
                        Just condTree -> not (null (condTreeComponents condTree))
        exeConds = foldr (\ (_,condTree) hasConfigs ->
                                if hasConfigs
                                    then True
                                    else not (null (condTreeComponents condTree)))
                        False (condExecutables gpd)
    in libConds || exeConds


packageNew' :: (FilePath -> IDEAction) -> IDEAction
packageNew' activateAction = do
    windows  <- getWindows
    mbDirName <- liftIO $ choosePackageDir (head windows)
    case mbDirName of
        Nothing -> return ()
        Just dirName -> do
            cfn <-  liftIO $ cabalFileName dirName
            continue <- do
                if isJust cfn
                    then liftIO $ do
                        md <- messageDialogNew Nothing [] MessageQuestion ButtonsYesNo
                                    $ "There is already a .cabal file in this directory."
                                    ++  " Continue anyway?"
                        rid <- dialogRun md
                        widgetDestroy md
                        case rid of
                            ResponseYes ->  return True
                            otherwise   ->  return False
                    else return True
            when continue $ do
                    modules <- liftIO $ do
                        b1 <- doesFileExist (dirName </> "Setup.hs")
                        b2 <- doesFileExist (dirName </> "Setup.lhs")
                        if  not (b1 || b2)
                            then do
                                sysMessage Normal "Setup.(l)hs does not exist. Writing Standard"
                                writeFile (dirName </> "Setup.lhs") standardSetup
                            else sysMessage Normal "Setup.(l)hs already exist"
                        allModules dirName
                    editPackage emptyPackageDescription{buildType = Just Simple} dirName modules activateAction
                    return ()

standardSetup = "#!/usr/bin/runhaskell \n"
                    ++ "> module Main where\n"
                    ++ "> import Distribution.Simple\n"
                    ++ "> main :: IO ()\n"
                    ++ "> main = defaultMain\n\n"

--  ---------------------------------------------------------------------
--  | We do some twist for handling build infos seperately to edit them in one editor together
--  with the other stuff. This type show what we really edit here
--

data PackageDescriptionEd = PDE {
    pd           :: PackageDescription,
    exes         :: [Executable'],
    mbLib        :: Maybe Library',
    bis          :: [BuildInfo]}

fromEditor :: PackageDescriptionEd -> PackageDescription
fromEditor (PDE pd exes' mbLib' buildInfos) =
    let     exes = map (\ (Executable' s fb bii) -> if bii + 1 > length buildInfos
                                        then Executable s fb (buildInfos !! (length buildInfos - 1))
                                        else Executable s fb (buildInfos !! bii)) exes'
            mbLib = case mbLib' of
                    Nothing -> Nothing
                    Just (Library' mn b bii) -> if bii + 1 > length buildInfos
                                        then Just (Library mn b (buildInfos !! (length buildInfos - 1)))
                                        else Just (Library mn b (buildInfos !! bii))
    in pd {library = mbLib, executables = exes}

toEditor :: PackageDescription -> PackageDescriptionEd
toEditor pd =
    let     (exes,bis) = unzip $ map (\ ((Executable s fb bi), i) -> (Executable' s fb i, bi))
                            (zip (executables pd) [0 .. length (executables pd)])
            (mbLib,bis2) = case library pd of
                    Nothing                -> (Nothing,bis)
                    Just (Library mn b bi) -> (Just (Library' mn b (length bis)), bis ++ [bi])
            bis3 = if null bis2
                        then [emptyBuildInfo]
                        else bis2
    in PDE (pd {library = Nothing , executables = []}) exes mbLib bis3

-- ---------------------------------------------------------------------
-- The pane stuff
--

data PackagePane             =   PackagePane {
    packageBox              ::   VBox
} deriving Typeable

instance IDEObject PackagePane

data PackageState = PackageState
    deriving (Read, Show, Typeable)

instance Pane PackagePane IDEM
    where
    primPaneName _  =   "Package"
    getAddedIndex _ =   0
    getTopWidget    =   castToWidget . packageBox
    paneId b        =   "*Package"
    makeActive p    =   activatePane p []
    close           =   closePane

instance RecoverablePane PackagePane PackageState IDEM where
    saveState p     =   return Nothing
    recoverState pp st  =  return ()

editPackage :: PackageDescription -> FilePath -> [ModuleName] -> (FilePath -> IDEAction) -> IDEAction
editPackage packageD packagePath modules afterSaveAction = do
    mbPane :: Maybe PackagePane <-  getPane
    case mbPane of
        Nothing -> do
            pp  <- getBestPathForId "*Package"
            nb  <- getNotebook pp
            packageInfos <- inGhc $ getInstalledPackageInfos
            let packageEd = toEditor packageD
            initPackage packagePath packageEd
                (packageDD
                    (map IPI.package packageInfos)
                    (takeDirectory packagePath)
                    modules
                    (length (bis packageEd))
                    (concatMap (buildInfoD (Just (takeDirectory packagePath)) modules)
                        [0..length (bis packageEd) - 1]))
                pp nb modules afterSaveAction
        Just p -> liftIO $ bringPaneToFront p

initPackage :: FilePath
    -> PackageDescriptionEd
    -> FieldDescription PackageDescriptionEd
    -> PanePath
    -> Notebook
    -> [ModuleName]
    -> (FilePath -> IDEAction)
    -> IDEM ()
initPackage packageDir packageD packageDescr panePath nb modules afterSaveAction = do
    let fields =  trace ("initPackage called " ++ packageDir) $ flattenFieldDescription packageDescr
    let initialPackagePath = packageDir </> (display . pkgName . package . pd) packageD ++ ".cabal"
    liftIO $ setCurrentDirectory packageDir
    packageInfos <- inGhc $ getInstalledPackageInfos
    newPane panePath nb (builder packageDir packageD packageDescr afterSaveAction initialPackagePath
        modules packageInfos fields)
    return ()

builder :: FilePath ->
    PackageDescriptionEd ->
    FieldDescription PackageDescriptionEd ->
    (FilePath -> IDEAction) ->
    FilePath ->
    [ModuleName] ->
    [PackageConfig] ->
    [FieldDescription PackageDescriptionEd] ->
    PanePath ->
    Notebook ->
    Window ->
    IDERef ->
    IO (PackagePane,Connections)
builder packageDir packageD packageDescr afterSaveAction initialPackagePath modules packageInfos fields
    panePath nb window ideR = do
    vb      <-  vBoxNew False 0
    let packagePane = PackagePane vb
    bb      <-  hButtonBoxNew
    restore <- buttonNewFromStock "Revert"
    save    <- buttonNewFromStock "gtk-save"
    closeB  <- buttonNewFromStock "gtk-close"
    addB    <- buttonNewFromStock "Add Build Info"
    removeB <- buttonNewFromStock "Remove Build Info"
    boxPackStart bb addB PackNatural 0
    boxPackStart bb removeB PackNatural 0
    boxPackStart bb restore PackNatural 0
    boxPackStart bb save PackNatural 0
    boxPackStart bb closeB PackNatural 0
    (widget, setInj, getExt, notifier)  <-  buildEditor packageDescr packageD
    let fieldNames = map (\fd -> case getParameterPrim paraName (parameters fd) of
                                    Just s -> s
                                    Nothing -> "Unnamed") fields
    save `onClicked` (do
        mbNewPackage' <- extractAndValidate packageD [getExt] fieldNames
        case mbNewPackage' of
            Nothing -> return ()
            Just newPackage' -> let newPackage = fromEditor newPackage' in do
                let packagePath = packageDir </> (display . pkgName . package . pd) newPackage'
                                                ++ ".cabal"
                writePackageDescription packagePath newPackage
                reflectIDE (afterSaveAction packagePath) ideR)
    closeB `onClicked` (do
        mbNewPackage' <- extractAndValidate packageD [getExt] fieldNames
        case mbNewPackage' of
            Nothing -> do
                md <- messageDialogNew Nothing [] MessageQuestion ButtonsYesNo
                                   "Package does not validate. Close anyway?"
                rid <- dialogRun md
                widgetDestroy md
                case rid of
                    ResponseYes ->  (reflectIDE (close packagePane >> return ()) ideR)
                    otherwise   ->  return ()
            Just newPackage -> do
                let packagePath = packageDir </> (display . pkgName . package . pd) newPackage
                modified <- do
                    exists <- liftIO $ doesFileExist packagePath
                    if exists
                        then do
                            packageNow    <- readPackageDescription normal packagePath
                            let simpleNow = flattenPackageDescription packageNow
                            case mbNewPackage' of
                                Nothing -> return True --doesn't validate, so something has changed
                                Just pd -> return (fromEditor pd /=
                                     simpleNow{buildDepends = reverse (buildDepends simpleNow)})
                        else return False
                cancel <- if modified
                    then do
                        md <- messageDialogNew (Just window) []
                                                    MessageQuestion
                                                    ButtonsNone
                                                    ("Save changes to Cabal file: "
                                                        ++ packagePath
                                                        ++ "?")
                        dialogAddButton md "_Save" ResponseYes
                        dialogAddButton md "_Don't Save" ResponseNo
                        dialogAddButton md "_Cancel" ResponseCancel
                        resp <- dialogRun md
                        widgetDestroy md
                        case resp of
                            ResponseYes ->   do
                                case mbNewPackage' of
                                    Nothing -> return False
                                    Just newPackage' -> let newPackage = fromEditor newPackage' in do
                                        let PackageIdentifier (PackageName n) v = package newPackage
                                        writePackageDescription packagePath newPackage
                                        return False
                            ResponseCancel  ->   return True
                            ResponseNo      ->   return False
                            _               ->   return False
                    else return False
                when (not cancel) (reflectIDE (close packagePane >> return ()) ideR))
    restore `onClicked` (do
        package <- readPackageDescription normal initialPackagePath
        setInj (toEditor (flattenPackageDescription package)))
    addB `onClicked` (do
        mbNewPackage' <- extractAndValidate packageD [getExt] fieldNames
        case mbNewPackage' of
            Nothing -> sysMessage Normal "Content doesn't validate"
            Just pde -> do
                reflectIDE (do
                    close packagePane
                    initPackage packageDir pde {bis = bis pde ++ [bis pde !! 0]}
                        (packageDD
                            (map IPI.package packageInfos)
                            packageDir
                            modules
                            (length (bis pde) + 1)
                            (concatMap (buildInfoD (Just packageDir) modules)
                                [0..length (bis pde)]))
                        panePath nb modules afterSaveAction) ideR)
    removeB `onClicked` (do
        mbNewPackage' <- extractAndValidate packageD [getExt] fieldNames
        case mbNewPackage' of
            Nothing -> sysMessage Normal "Content doesn't validate"
            Just pde | length (bis pde) == 1  -> sysMessage Normal "Just one Build Info"
                     | otherwise -> reflectIDE (do
                    close packagePane
                    initPackage packageDir pde{bis = take (length (bis pde) - 1) (bis pde)}
                        (packageDD
                            (map IPI.package packageInfos)
                            packageDir
                            modules
                            (length (bis pde) - 1)
                            (concatMap (buildInfoD (Just packageDir) modules)
                                [0..length (bis pde) - 2]))
                        panePath nb modules afterSaveAction) ideR)
    boxPackStart vb widget PackGrow 7
    boxPackEnd vb bb PackNatural 7
    return (packagePane,[])

-- ---------------------------------------------------------------------
-- The description with some tricks
--

packageDD :: [PackageIdentifier]
    -> FilePath
    -> [ModuleName]
    -> Int
    -> [(String, FieldDescription PackageDescriptionEd)]
    -> FieldDescription PackageDescriptionEd
packageDD packages fp modules numBuildInfos extras = NFD ([
    ("Package", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Synopsis"
           $ paraSynopsis <<<- ParaSynopsis "A one-line summary of this package"
           $ emptyParams)
            (synopsis . pd)
            (\ a b -> b{pd = (pd b){synopsis = a}})
            (stringEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "Package Identifier" $ emptyParams)
            (package . pd)
            (\ a b -> b{pd = (pd b){package = a}})
            packageEditor
    ,   mkField
            (paraName <<<- ParaName "Description"
                $ paraSynopsis <<<- ParaSynopsis "A more verbose description of this package"
                    $ paraShadow <<<- ParaShadow ShadowOut
                        $ paraMinSize <<<- ParaMinSize (-1,210)
                            $ emptyParams)
            (description . pd)
            (\ a b -> b{pd = (pd b){description = if null a then " \n\n\n\n\n" else a}})
            multilineStringEditor
    ,   mkField
            (paraName <<<- ParaName "Homepage" $ emptyParams)
            (homepage . pd)
            (\ a b -> b{pd = (pd b){homepage = a}})
            (stringEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "Package URL" $ emptyParams)
            (pkgUrl . pd)
            (\ a b -> b{pd = (pd b){pkgUrl = a}})
            (stringEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "Category" $ emptyParams)
            (category . pd)
            (\ a b -> b{pd = (pd b){category = a}})
            (stringEditor (const True))
    ]),
    ("Description", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Stability" $ emptyParams)
            (stability . pd)
            (\ a b -> b{pd = (pd b){stability = a}})
            (stringEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "License" $ emptyParams)
            (license . pd)
            (\ a b -> b{pd = (pd b){license = a}})
            (comboSelectionEditor [GPL, LGPL, BSD3, BSD4, PublicDomain, AllRightsReserved, OtherLicense] show)
    ,   mkField
            (paraName <<<- ParaName "License File" $ emptyParams)
            (licenseFile . pd)
            (\ a b -> b{pd = (pd b){licenseFile = a}})
            (fileEditor (Just fp) FileChooserActionOpen "Select file")
    ,   mkField
            (paraName <<<- ParaName "Copyright" $ emptyParams)
            (copyright . pd)
            (\ a b -> b{pd = (pd b){copyright = a}})
            (stringEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "Author" $ emptyParams)
            (author . pd)
            (\ a b -> b{pd = (pd b){author = a}})
            (stringEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "Maintainer" $ emptyParams)
            (maintainer . pd)
            (\ a b -> b{pd = (pd b){maintainer = a}})
            (stringEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "Bug Reports" $ emptyParams)
            (bugReports . pd)
            (\ a b -> b{pd = (pd b){bugReports = a}})
            (stringEditor (const True))
    ]),
--    ("Repositories", VFD emptyParams [
--        mkField
--            (paraName <<<- ParaName "Source Repositories" $ emptyParams)
--            (sourceRepos . pd)
--            (\ a b -> b{pd = (pd b){sourceRepos = a}})
--            reposEditor]),
    ("Dependencies  ", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Build Dependencies"
                $ paraSynopsis <<<- ParaSynopsis "Does this package depends on other packages?"
                    $ paraDirection <<<- ParaDirection Vertical
                        $ paraMinSize <<<- ParaMinSize (-1,250)
                            $ emptyParams)
            (reverse . buildDepends . pd)
            (\ a b -> b{pd = (pd b){buildDepends = a}})
            (dependenciesEditor packages)
    ]),
    ("Meta Dep.", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Cabal version"
                $ paraSynopsis <<<- ParaSynopsis
                    "Does this package depends on a specific version of Cabal?"
                    $ paraShadow <<<- ParaShadow ShadowIn $ emptyParams)
            (descCabalVersion . pd)
            (\ a b -> b{pd = (pd b){descCabalVersion = a}})
            versionRangeEditor
    ,   mkField
            (paraName <<<- ParaName "Tested with compiler"
                $ paraShadow <<<- ParaShadow ShadowIn
                    $ paraDirection <<<- ParaDirection Vertical
                        $ emptyParams)
            (\a -> case (testedWith . pd) a of
                []          -> []--(GHC,AnyVersion)]
                l           -> l)
            (\ a b -> b{pd = (pd b){testedWith = a}})
            testedWithEditor
    ]),
    ("Data Files", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Data Files"
                $ paraSynopsis <<<- ParaSynopsis
                    "A list of files to be installed for run-time use by the package."
                    $ paraDirection <<<- ParaDirection Vertical
                        $ paraMinSize <<<- ParaMinSize (-1,250)
                            $ emptyParams)
            (dataFiles . pd)
            (\ a b -> b{pd = (pd b){dataFiles = a}})
            (filesEditor (Just fp) FileChooserActionOpen "Select File")
    ,   mkField
            (paraName <<<- ParaName "Data directory" $ emptyParams)
            (dataDir . pd)
            (\ a b -> b{pd = (pd b){dataDir = a}})
            (fileEditor (Just fp) FileChooserActionSelectFolder "Select file")
    ]),
    ("Extra Files", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Extra Source Files"
                $ paraSynopsis <<<- ParaSynopsis
                    "A list of additional files to be included in source distributions."
                    $ paraDirection <<<- ParaDirection Vertical
                        $ paraMinSize <<<- ParaMinSize (-1,120)
                            $ emptyParams)
            (extraSrcFiles . pd)
            (\ a b -> b{pd = (pd b){extraSrcFiles = a}})
            (filesEditor (Just fp) FileChooserActionOpen "Select File")
    ,   mkField
            (paraName <<<-  ParaName "Extra Tmp Files"
                $ paraSynopsis <<<- ParaSynopsis
                    "A list of additional files or directories to be removed by setup clean."
                    $ paraDirection <<<- ParaDirection Vertical
                        $ paraMinSize <<<- ParaMinSize (-1,120)
                            $ emptyParams)
            (extraTmpFiles . pd)
            (\ a b -> b{pd = (pd b){extraTmpFiles = a}})
            (filesEditor (Just fp) FileChooserActionOpen "Select File")
    ]),
    ("Other",VFD emptyParams  [
        mkField
            (paraName <<<- ParaName "Build Type"
                $ paraSynopsis <<<- ParaSynopsis
                "Describe executable programs contained in the package"
                        $ paraShadow <<<- ParaShadow ShadowIn
                            $ paraDirection <<<- ParaDirection Vertical
                                $ emptyParams)
            (buildType . pd)
            (\ a b -> b{pd = (pd b){buildType = a}})
            (maybeEditor (buildTypeEditor, emptyParams) True "Specify?")
    ,   mkField
            (paraName <<<- ParaName "Custom Fields"
                $ paraShadow <<<- ParaShadow ShadowIn
                     $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (customFieldsPD . pd)
            (\ a b -> b{pd = (pd b){customFieldsPD = a}})
            (multisetEditor
                (ColumnDescr True [("Name",\(n,_) -> [cellText := n])
                                   ,("Value",\(_,v) -> [cellText := v])])
                ((pairEditor
                    (stringxEditor (const True),emptyParams)
                    (stringEditor (const True),emptyParams)),emptyParams)
            Nothing
            Nothing)
    ]),
    ("Executables",VFD emptyParams  [
        mkField
            (paraName <<<- ParaName "Executables"
                $ paraSynopsis <<<- ParaSynopsis
                "Describe executable programs contained in the package"
                    $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            exes
            (\ a b -> b{exes = a})
            (executablesEditor (Just fp) modules numBuildInfos)
    ]),
    ("Library", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Library"
           $ paraSynopsis <<<- ParaSynopsis
             "If the package contains a library, specify the exported modules here"
           $ paraDirection <<<- ParaDirection Vertical
           $ paraShadow <<<- ParaShadow ShadowIn $ emptyParams)
            mbLib
            (\ a b -> b{mbLib = a})
            (maybeEditor (libraryEditor (Just fp) modules numBuildInfos,
                paraName <<<- ParaName "Specify exported modules"
                $ emptyParams) True
                "Does this package contain a library?")
    ])
    ] ++ extras)

update :: [BuildInfo] -> Int -> (BuildInfo -> BuildInfo)  -> [BuildInfo]
update bis index func =
    map (\(bi,ind) -> if ind == index
                        then func bi
                        else bi)
        (zip bis [0..length bis - 1])

buildInfoD :: Maybe FilePath -> [ModuleName] -> Int -> [(String,FieldDescription PackageDescriptionEd)]
buildInfoD fp modules i = [
    (show (i + 1) ++ " Build Info", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Component is buildable here" $ emptyParams)
            (buildable . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{buildable = a})})
            boolEditor
    ,   mkField
            (paraName  <<<- ParaName
                "Where to look for the source hierarchy"
                $ paraSynopsis <<<- ParaSynopsis
                    "Root directories for the source hierarchy."
                    $ paraShadow  <<<- ParaShadow ShadowIn
                        $ paraDirection  <<<- ParaDirection Vertical
                            $ emptyParams)
            (hsSourceDirs . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{hsSourceDirs = a})})
            (filesEditor fp FileChooserActionSelectFolder "Select folder")
    ,   mkField
            (paraName <<<- ParaName "Non-exposed or non-main modules"
            $ paraSynopsis <<<- ParaSynopsis ("A list of modules used by the component but "
                                             ++ "not exposed to users.")
                $ paraShadow <<<- ParaShadow ShadowIn
                    $ paraDirection <<<- ParaDirection Vertical
                        $ paraMinSize <<<- ParaMinSize (-1,300)
                            $ paraPack <<<- ParaPack PackGrow
                                $ emptyParams)
            (map display. otherModules . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi ->
                bi{otherModules = (map (\i -> forceJust (simpleParse i)
                "   PackageEditor >> buildInfoD: no parse for moduile name" ) a)})})
            (modulesEditor modules)
    ]),
    (show (i + 1) ++ " Compiler ", VFD emptyParams [
        mkField
            (paraName  <<<- ParaName "Options for haskell compilers"
            $ paraDirection <<<- ParaDirection Vertical
            $ paraShadow <<<- ParaShadow ShadowIn
            $ paraPack <<<- ParaPack PackGrow $ emptyParams)
            (options . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{options = a})})
            (multisetEditor
                (ColumnDescr True [("Compiler Flavor",\(cv,_) -> [cellText := show cv])
                                   ,("Options",\(_,op) -> [cellText := concatMap (\s -> ' ' : s) op])])
                ((pairEditor
                    (compilerFlavorEditor,emptyParams)
                    (optsEditor,emptyParams)),
                        (paraDirection <<<- ParaDirection Vertical
                            $ paraShadow  <<<- ParaShadow ShadowIn $ emptyParams))
                Nothing
                Nothing)
     ,  mkField
            (paraName <<<- ParaName "Additional options for GHC when built with profiling"
           $ emptyParams)
            (ghcProfOptions . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{ghcProfOptions = a})})
            optsEditor
     ,  mkField
            (paraName <<<- ParaName "Additional options for GHC when the package is built as shared library"
           $ emptyParams)
            (ghcSharedOptions . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{ghcSharedOptions = a})})
            optsEditor
    ]),
    (show (i + 1) ++ " Extensions ", VFD emptyParams [
        mkField
            (paraName  <<<- ParaName "Extensions"
                $ paraSynopsis  <<<- ParaSynopsis
                    "A list of Haskell extensions used by every module."
                         $ paraMinSize <<<- ParaMinSize (-1,400)
                            $ paraPack <<<- ParaPack PackGrow
                                $ emptyParams)
            (extensions . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{extensions = a})})
            extensionsEditor
    ]),
    (show (i + 1) ++ " Build Tools ", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Tools needed for a build"
                $ paraDirection <<<- ParaDirection Vertical
                    $ paraMinSize <<<- ParaMinSize (-1,120)
                        $ emptyParams)
            (buildTools . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{buildTools = a})})
            (dependenciesEditor [])
    ]),
    (show (i + 1) ++ " Pkg Config ", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "A list of pkg-config packages, needed to build this package"
                $ paraDirection <<<- ParaDirection Vertical
                    $ paraMinSize <<<- ParaMinSize (-1,120)
                        $ emptyParams)
            (pkgconfigDepends . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{pkgconfigDepends = a})})
            (dependenciesEditor [])
    ]),
    (show (i + 1) ++ " Opts C -1-", VFD emptyParams [
         mkField
            (paraName <<<- ParaName "Options for C compiler"
                $ paraDirection <<<- ParaDirection Vertical
                    $ emptyParams)
            (ccOptions . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{ccOptions = a})})
            optsEditor
    ,    mkField
            (paraName <<<- ParaName "Options for linker"
                $ paraDirection <<<- ParaDirection Vertical
                    $ emptyParams)
            (ldOptions . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{ldOptions = a})})
            optsEditor
    ,    mkField
            (paraName <<<- ParaName "A list of header files to use when compiling"
                $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (includes . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{includes = a})})
            (stringsEditor (const True))
     ,   mkField
            (paraName <<<- ParaName "A list of header files to install"
                $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (installIncludes . (\a -> a !! i) . bis)
             (\ a b -> b{bis = update (bis b) i (\bi -> bi{installIncludes = a})})
           (filesEditor fp FileChooserActionOpen "Select File")
    ]),
    (show (i + 1) ++ " Opts C -2-", VFD emptyParams [
         mkField
            (paraName <<<- ParaName "A list of directories to search for header files"
                $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (includeDirs . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{includeDirs = a})})
            (filesEditor fp FileChooserActionSelectFolder "Select Folder")
     ,   mkField
            (paraName <<<- ParaName
                "A list of C source files to be compiled,linked with the Haskell files."
                $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (cSources . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{cSources = a})})
            (filesEditor fp FileChooserActionOpen "Select file")
    ]),
    (show (i + 1) ++ " Opts Libs ", VFD emptyParams [
         mkField
            (paraName <<<- ParaName "A list of extra libraries to link with"
                $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (extraLibs . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{extraLibs = a})})
            (stringsEditor (const True))
     ,   mkField
            (paraName <<<- ParaName "A list of directories to search for libraries."
                $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (extraLibDirs . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{extraLibDirs = a})})
            (filesEditor fp FileChooserActionSelectFolder "Select Folder")
   ]),
    (show (i + 1) ++ " Other", VFD emptyParams [
        mkField
            (paraName <<<- ParaName "Support frameworks for Mac OS X"
                $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
            (frameworks . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{frameworks = a})})
            (stringsEditor (const True))
    ,   mkField
            (paraName <<<- ParaName "Custom fields build info"
                $ paraShadow <<<- ParaShadow ShadowIn
                     $ paraDirection <<<- ParaDirection Vertical $ emptyParams)
             (customFieldsBI . (\a -> a !! i) . bis)
            (\ a b -> b{bis = update (bis b) i (\bi -> bi{customFieldsBI = a})})
            (multisetEditor
                (ColumnDescr True [("Name",\(n,_) -> [cellText := n])
                                   ,("Value",\(_,v) -> [cellText := v])])
                ((pairEditor
                    (stringxEditor (const True),emptyParams)
                    (stringEditor (const True),emptyParams)),emptyParams)
            Nothing
            Nothing)
            ])]

stringxEditor :: (String -> Bool) -> Editor String
stringxEditor val para noti = do
    (wid,inj,ext) <- stringEditor val para noti
    let
        xinj ("") = inj ""
        xinj ('x':'-':rest) = inj rest
        xinj _ = throwIDE "PackageEditor>>stringxEditor: field without leading x-"
        xext = do
            res <- ext
            case res of
                Nothing -> return Nothing
                Just str -> return (Just ("x-" ++ str))
    return (wid,xinj,xext)

optsEditor :: Editor [String]
optsEditor para noti = do
    (wid,inj,ext) <- stringEditor (const True) para noti
    let
        oinj = inj . unwords
        oext = do
            res <- ext
            case res of
                Nothing -> return Nothing
                Just str -> return (Just (words str))
    return (wid,oinj,oext)

packageEditor :: Editor PackageIdentifier
packageEditor para noti = do
    (wid,inj,ext) <- pairEditor
        (stringEditor (\s -> not (null s)), paraName <<<- ParaName "Name" $ emptyParams)
        (versionEditor, paraName <<<- ParaName "Version" $ emptyParams)
        (paraDirection <<<- ParaDirection Horizontal
            $ paraShadow <<<- ParaShadow ShadowIn
                $ para) noti
    let pinj (PackageIdentifier (PackageName n) v) = inj (n,v)
    let pext = do
        mbp <- ext
        case mbp of
            Nothing -> return Nothing
            Just (n,v) -> do
                if null n
                    then return Nothing
                    else return (Just $PackageIdentifier (PackageName n) v)
    return (wid,pinj,pext)

testedWithEditor :: Editor [(CompilerFlavor, VersionRange)]
testedWithEditor para = do
    multisetEditor
       (ColumnDescr True [("Compiler Flavor",\(cv,_) -> [cellText := show cv])
                           ,("Version Range",\(_,vr) -> [cellText := display vr])])
       (pairEditor
            (compilerFlavorEditor, paraShadow <<<- (ParaShadow ShadowNone) $ emptyParams)
            (versionRangeEditor, paraShadow <<<- (ParaShadow ShadowNone) $ emptyParams),
            (paraDirection <<<- (ParaDirection Vertical) $ emptyParams))
       Nothing
       (Just (==))
       para

compilerFlavorEditor :: Editor CompilerFlavor
compilerFlavorEditor para noti = do
    (wid,inj,ext) <- eitherOrEditor
        (comboSelectionEditor flavors show, paraName <<<- (ParaName "Select compiler") $ emptyParams)
        (stringEditor (\s -> not (null s)), paraName <<<- (ParaName "Specify compiler") $ emptyParams)
        "Other"
        (paraName <<<- ParaName "Select" $ para)
        noti
    let cfinj comp  = case comp of
                        (OtherCompiler str) -> inj (Right str)
                        other               -> inj (Left other)
    let cfext = do
        mbp <- ext
        case mbp of
            Nothing -> return Nothing
            Just (Right s) -> return (Just $OtherCompiler s)
            Just (Left other) -> return (Just other)
    return (wid,cfinj,cfext)
        where
        flavors = [GHC, NHC, Hugs, HBC, Helium, JHC]

buildTypeEditor :: Editor BuildType
buildTypeEditor para noti = do
    (wid,inj,ext) <- eitherOrEditor
        (comboSelectionEditor flavors show, paraName <<<- (ParaName "Select") $ emptyParams)
        (stringEditor (const True), paraName <<<- (ParaName "Unknown") $ emptyParams)
        "Unknown"
        (paraName <<<- ParaName "Select" $ para)
        noti
    let cfinj comp  = case comp of
                        (UnknownBuildType str) -> inj (Right str)
                        other               -> inj (Left other)
    let cfext = do
        mbp <- ext
        case mbp of
            Nothing -> return Nothing
            Just (Right s) -> return (Just $ UnknownBuildType s)
            Just (Left other) -> return (Just other)
    return (wid,cfinj,cfext)
        where
        flavors = [Simple, Configure, Make, Custom]

extensionsEditor :: Editor [Extension]
extensionsEditor = staticListMultiEditor extensionsL show


extensionsL :: [Extension]
extensionsL = knownExtensions

{--
reposEditor :: Editor [SourceRepo]
reposEditor p noti =
    multisetEditor
        (ColumnDescr False [("",\repo -> [cellText := display repo])])
        (repoEditor,
            paraOuterAlignment <<<- ParaInnerAlignment (0.0, 0.5, 1.0, 1.0)
                $ paraInnerAlignment <<<- ParaOuterAlignment (0.0, 0.5, 1.0, 1.0)
                   $ emptyParams)
        Nothing
        Nothing
        (paraShadow <<<- ParaShadow ShadowIn $
            paraOuterAlignment <<<- ParaInnerAlignment (0.0, 0.5, 1.0, 1.0)
                $ paraInnerAlignment <<<- ParaOuterAlignment (0.0, 0.5, 1.0, 1.0)
                    $ paraDirection  <<<-  ParaDirection Vertical
                        $ paraPack <<<- ParaPack PackGrow
                            $ p)
        noti

instance Text SourceRepo where
  disp (SourceRepo repoKind repoType repoLocation repoModule repoBranch repoTag repoSubdir)
    = disp repoKind
        <+> case repoType of
                Nothing -> empty
                Just repoT -> disp repoT
        <+> case repoLocation of
                Nothing -> empty
                Just repoL -> text repoL

repoEditor :: Editor SourceRepo
repoEditor paras noti = do
    (widg,inj,ext) <- tupel7Editor
                            (repoKindEditor,noBorder)
                            (maybeEditor (repoTypeEditor,noBorder) True "Specify a type", emptyParams)
                            (maybeEditor (stringEditor (const True),noBorder) True "Specify a location", emptyParams)
                            (maybeEditor (stringEditor (const True),noBorder) True "Specify a module", emptyParams)
                            (maybeEditor (stringEditor (const True),noBorder) True "Specify a branch", emptyParams)
                            (maybeEditor (stringEditor (const True),noBorder) True "Specify a tag", emptyParams)
                            (maybeEditor (stringEditor (const True),noBorder) True "Specify a subdir", emptyParams)
                            (paraDirection  <<<- ParaDirection Vertical $ noBorder)
                            noti
    return (widg,
        (\ r -> inj (repoKind r,repoType r,repoLocation r,repoModule r,repoBranch r,repoTag r,repoSubdir r)),
        (do
            mb <- ext
            case mb of
                Nothing        -> return Nothing
                Just (a,b,c,d,e,f,g) -> return (Just (SourceRepo a b c d e f g))))
    where noBorder  =  paraOuterAlignment <<<- ParaOuterAlignment  (0.0, 0.0, 0.0, 0.0)
                            $ paraOuterPadding <<<- ParaOuterPadding    (0, 0, 0, 0)
                                $ paraInnerAlignment <<<- ParaInnerAlignment  (0.0, 0.0, 0.0, 0.0)
                                    $ paraInnerPadding <<<- ParaInnerPadding   (0, 0, 0, 0)
                                        $ emptyParams

repoKindEditor :: Editor RepoKind
repoKindEditor paras noti = do
    (widg,inj,ext) <- pairEditor
                        (comboSelectionEditor selectionList show, emptyParams)
                        (stringEditor (const True),emptyParams)
                        paras
                        noti
    return (widg,
            (\kind -> case kind of
                        RepoKindUnknown str  -> inj (RepoKindUnknown "",str)
                        other                -> inj (other,"")),
            (do
                mbRes <- ext
                case mbRes of
                    Nothing                       -> return Nothing
                    Just (RepoKindUnknown "",str) -> return (Just (RepoKindUnknown str))
                    Just (other,_)                -> return (Just other)))
    where selectionList =  [RepoHead, RepoThis, RepoKindUnknown ""]

repoTypeEditor :: Editor RepoType
repoTypeEditor paras noti = do
    (widg,inj,ext) <- pairEditor
                        (comboSelectionEditor selectionList show, emptyParams)
                        (stringEditor (const True),emptyParams)
                        paras
                        noti
    return (widg,
            (\kind -> case kind of
                        OtherRepoType str    -> inj (OtherRepoType "",str)
                        other                -> inj (other,"")),
            (do
                mbRes <- ext
                case mbRes of
                    Nothing                       -> return Nothing
                    Just (OtherRepoType "",str)   -> return (Just (OtherRepoType str))
                    Just (other,_)                -> return (Just other)))
    where selectionList =  [Darcs, Git, SVN, CVS, Mercurial, GnuArch, Bazaar, Monotone, OtherRepoType ""]
--}

-- ------------------------------------------------------------
-- * BuildInfos
-- ------------------------------------------------------------

data Library' = Library'{
    exposedModules' :: [ModuleName]
,   libExposed'     :: Bool
,   libBuildInfoIdx :: Int}
    deriving (Show, Eq)

data Executable' = Executable'{
    exeName'        :: String
,   modulePath'     :: FilePath
,   buildInfoIdx    :: Int}
    deriving (Show, Eq)

instance Default Library'
    where getDefault =  Library' [] getDefault getDefault

instance Default Executable'
    where getDefault = Executable' getDefault getDefault getDefault


libraryEditor :: Maybe FilePath -> [ModuleName] -> Int -> Editor Library'
libraryEditor fp modules numBuildInfos para noti = do
    (wid,inj,ext) <-
        tupel3Editor
            (boolEditor,
            paraName <<<- ParaName "Exposed"
            $ paraSynopsis <<<- ParaSynopsis "Is the lib to be exposed by default?"
            $ emptyParams)
            (modulesEditor modules,
            paraName <<<- ParaName "Exposed Modules"
            $ paraMinSize <<<- ParaMinSize (-1,300)
            $ para)
            (buildInfoEditorP numBuildInfos, paraName <<<- ParaName "Build Info"
            $ paraPack <<<- ParaPack PackNatural
            $ para)
            (paraDirection <<<- ParaDirection Vertical
            $ emptyParams)
            noti
    let pinj (Library' em exp bi) = inj (exp, map display em,bi)
    let pext = do
        mbp <- ext
        case mbp of
            Nothing -> return Nothing
            Just (exp,em,bi) -> return (Just $ Library' (map (\s -> forceJust (simpleParse s)
                "SpecialEditor >> libraryEditor: no parse for moduile name") em) exp bi)
    return (wid,pinj,pext)

--moduleEditor :: [ModuleName] -> Editor String
--moduleEditor modules    =   comboSelectionEditor (map display modules)

modulesEditor :: [ModuleName] -> Editor [String]
modulesEditor modules   =   staticListMultiEditor (map display modules) id

executablesEditor :: Maybe FilePath -> [ModuleName] -> Int -> Editor [Executable']
executablesEditor fp modules countBuildInfo p =
    multisetEditor
        (ColumnDescr True [("Executable Name",\(Executable' exeName _ _) -> [cellText := exeName])
                           ,("Module Path",\(Executable'  _ mp _) -> [cellText := mp])

                           ,("Build info index",\(Executable'  _ _ bii) -> [cellText := show (bii + 1)])])
        (executableEditor fp modules countBuildInfo,emptyParams)
        Nothing
        Nothing
        (paraShadow  <<<- ParaShadow ShadowIn $ p)

executableEditor :: Maybe FilePath -> [ModuleName] -> Int -> Editor Executable'
executableEditor fp modules countBuildInfo para noti = do
    (wid,inj,ext) <- tupel3Editor
        (stringEditor (\s -> not (null s)),
            paraName <<<- ParaName "Executable Name"
            $ emptyParams)
        (stringEditor (\s -> not (null s)),
            paraDirection <<<- ParaDirection Vertical
            $ paraName <<<- ParaName "File with main function"
            $ emptyParams)
        (buildInfoEditorP countBuildInfo, paraName <<<- ParaName "Build Info"
            $ paraOuterAlignment <<<- ParaOuterAlignment  (0.0, 0.0, 0.0, 0.0)
                $ paraOuterPadding <<<- ParaOuterPadding    (0, 0, 0, 0)
                    $ paraInnerAlignment <<<- ParaInnerAlignment  (0.0, 0.0, 0.0, 0.0)
                        $ paraInnerPadding <<<- ParaInnerPadding   (0, 0, 0, 0)
                            $ emptyParams)
        (paraDirection  <<<- ParaDirection Vertical $ para)
        noti
    let pinj (Executable' s f bi) = inj (s,f,bi)
    let pext = do
        mbp <- ext
        case mbp of
            Nothing -> return Nothing
            Just (s,f,bi) -> return (Just $Executable' s f bi)
    return (wid,pinj,pext)

buildInfoEditorP :: Int -> Editor Int
buildInfoEditorP numberOfBuildInfos para noti = do
    (wid,inj,ext) <- intEditor (1.0,fromIntegral numberOfBuildInfos,1.0)
        (paraName <<<- ParaName "Build Info" $para) noti
    let pinj i = inj (i + 1)
    let pext =   do
        mbV <- ext
        case mbV of
            Nothing -> return Nothing
            Just i  -> return (Just (i - 1))
    return (wid,pinj,pext)

-- ------------------------------------------------------------
-- * (Boring) default values
-- ------------------------------------------------------------


instance Default CompilerFlavor
    where getDefault =  GHC

instance Default BuildInfo
    where getDefault =  emptyBuildInfo

instance Default Library
    where getDefault =  Library [] getDefault getDefault

instance Default Executable
    where getDefault = Executable getDefault getDefault getDefault

instance Default RepoType
    where getDefault = Darcs

instance Default RepoKind
    where getDefault = RepoThis

instance Default SourceRepo
    where getDefault =  SourceRepo getDefault getDefault getDefault getDefault getDefault
                                    getDefault getDefault

instance Default BuildType
    where getDefault = Simple