157 lines
4.7 KiB
Elm
157 lines
4.7 KiB
Elm
module Main exposing (main)
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import Browser
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import Html exposing (Html)
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import Html.Events exposing (onInput, onClick)
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import Html.Attributes exposing (type_, class, classList, value)
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import Bergamot.Syntax exposing (..)
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import Bergamot.Search exposing (..)
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import Bergamot.Rules exposing (..)
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import Bergamot.Parser exposing (..)
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import Bergamot.Latex exposing (..)
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import Bergamot.ObjectLanguage exposing (..)
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import Json.Encode
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import Maybe
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import Tuple
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type Tab
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= Editor
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| Rendered
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tabEq : Tab -> Tab -> Bool
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tabEq t1 t2 =
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case (t1, t2) of
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(Editor, Editor) -> True
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(Rendered, Rendered) -> True
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_ -> False
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type EditMode
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= Query
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| Syntax
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modeEq : EditMode -> EditMode -> Bool
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modeEq m1 m2 =
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case (m1, m2) of
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(Query, Query) -> True
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(Syntax, Syntax) -> True
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_ -> False
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type alias Model =
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{ program : String
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, query : String
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, tab : Tab
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, editMode : EditMode
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}
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type alias Flags = { rules: String, query: String }
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type Msg
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= SetProgram String
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| SetQuery String
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| SetTab Tab
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| SetEditMode EditMode
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init : Flags -> (Model, Cmd Msg)
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init fs = ({ program = fs.rules, query = fs.query, tab = Editor, editMode = Syntax }, Cmd.none)
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viewSection : String -> Html Msg -> Html Msg
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viewSection name content =
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Html.div [ class "bergamot-section" ] [ Html.em [ class "bergamot-section-heading" ] [ Html.text name ], content ]
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viewTab : Tab -> Html Msg -> Html Msg -> Html Msg
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viewTab tab editor rendered =
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case tab of
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Editor -> editor
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Rendered -> rendered
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viewSelector : (a -> a -> Bool) -> (a -> Msg) -> a -> List (a, String) -> Html Msg
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viewSelector eq mkMsg mode modeNames =
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Html.div [ class "bergamot-selector" ] <|
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List.map (\(modep, name) ->
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Html.button
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[ classList [("active", eq mode modep)]
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, onClick (mkMsg modep)
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] [ Html.text name ]) modeNames
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viewTabSelector : Tab -> List (Tab, String) -> Html Msg
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viewTabSelector = viewSelector tabEq SetTab
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viewEditModeSelector : EditMode -> List (EditMode, String) -> Html Msg
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viewEditModeSelector = viewSelector modeEq SetEditMode
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viewRule : Rule -> Html Msg
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viewRule = latex << ruleToLatex
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viewRules : String -> Html Msg
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viewRules progs = viewSection "Rendered Rules" <|
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Html.div [ class "bergamot-rule-list" ] <|
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case run program progs of
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Just prog -> List.map viewRule prog.rules
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Nothing -> []
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proofGoal : EditMode -> String -> Maybe (Term Metavariable)
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proofGoal mode querys =
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case mode of
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Query -> run term querys
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Syntax -> Maybe.map (\e -> Call "type" [exprToTerm e, Var (MkMetavariable "tau")]) <| run parseExpr querys
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tryProve : EditMode -> String -> String -> Maybe ProofTree
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tryProve mode progs querys =
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case (run program progs, proofGoal mode querys) of
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(Just prog, Just query) -> single prog (prove query |> Bergamot.Rules.andThen reifyProofTree)
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_ -> Nothing
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viewProofTree : EditMode -> String -> String -> Html Msg
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viewProofTree mode progs querys = viewSection "Proof Tree" <|
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Html.div [ class "bergamot-proof-tree" ] <|
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case tryProve mode progs querys of
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Just tree -> [ latex (proofTreeToLatex tree) ]
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Nothing -> []
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view : Model -> Html Msg
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view m = Html.div [ class "bergamot-root" ]
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[ viewTabSelector m.tab [(Editor, "Rule Editor"), (Rendered, "Rendered Rules")]
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, viewEditModeSelector m.editMode [(Query, "Query"), (Syntax, "Language Term")]
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, viewTab m.tab
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(viewSection "Rules" <| Html.textarea [ onInput SetProgram ] [ Html.text m.program ])
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(viewRules m.program)
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, viewSection "Query" <| Html.input [ type_ "text", onInput SetQuery, value m.query ] []
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, viewProofTree m.editMode m.program m.query
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]
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update : Msg -> Model -> (Model, Cmd Msg)
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update msg m =
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case msg of
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SetProgram prog -> ({ m | program = prog }, Cmd.none)
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SetQuery query -> ({ m | query = query }, Cmd.none)
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SetTab tab -> ({ m | tab = tab }, Cmd.none)
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SetEditMode mode -> ({ m | editMode = mode }, Cmd.none)
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subscriptions : Model -> Sub Msg
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subscriptions _ = Sub.none
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main =
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Browser.element
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{ init = init
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, view = view
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, update = update
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, subscriptions = subscriptions
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}
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-- Latex support:
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-- Based on https://stackoverflow.com/questions/75492820/embedding-mathematical-equations-in-an-elm-spa
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latex : String -> Html Msg
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latex expr =
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Html.node "katex-expression"
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[ Html.Attributes.attribute "expression" expr
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, Html.Attributes.attribute "katex-options" (Json.Encode.encode 0 options)
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]
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[]
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options : Json.Encode.Value
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options =
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Json.Encode.object
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[ ( "displayMode", Json.Encode.bool True )
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]
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