blog-static/layouts/shortcodes/bergamot_js_css.html

<script defer src="{{ .Site.Params.bergamotJsUrl }}"></script>
<script defer src="{{ .Site.Params.bergamotObjectLanguageJsUrl }}"></script>
{{ $style := resources.Get "scss/bergamot.scss" | resources.ToCSS | resources.Minify }}
<link rel="stylesheet" href="{{ $style.Permalink }}">
<script defer>
const renderRules =
    `
    PrecApp @ prec(app(?l, ?r), 100, left) <-;
    PrecPlus @ prec(plus(?l, ?r), 80, either) <-;
    PrecAbs @ prec(abs(?x, ?t, ?e), 0, right) <-;
    PrecArr @ prec(tarr(?l, ?r), 0, right) <-;

    SelectHead @ select(cons([?t, ?v], ?rest), ?default, ?v) <- ?t;
    SelectTail @ select(cons([?t, ?v], ?rest), ?default, ?found) <- not(?t), select(?rest, ?default, ?found);
    SelectEmpty @ select(nil, ?default, ?default) <-;

    ParenthAssocLeft @ parenthassoc(?a_i, left, right) <-;
    ParenthAssocRight @ parenthassoc(?a_i, right, left) <-;
    ParenthAssocNone @ parenthassoc(?a_i, none, ?pos) <-;
    ParenthAssocNeq @ parenthassoc(?a_i, ?a_o, ?pos) <- not(symeq(?a_i, ?a_o));

    Parenth @ parenth(?inner, ?outer, ?pos, ?strin, ?strout) <-
        prec(?inner, ?p_i, ?a_i), prec(?outer, ?p_o, ?a_o),
        join(["(", ?strin, ")"], ?strinparen),
        select([ [less(?p_i, ?p_o), strinparen], [less(?p_o, ?p_i), ?strin], [ parenthassoc(?a_i, ?a_o, ?pos), ?strinparen ] ], ?strin, ?strout);
    ParenthFallback @ parenth(?inner, ?outer, ?pos, ?strin, ?strin) <-;

    LatexListNil @ latexlist(nil, nil) <-;
    LatexListCons @ latexlist(cons(?x, ?xs), cons(?l_x, ?l_s)) <- latex(?x, ?l_x), latexlist(?xs, ?l_s);

    IntercalateNil @ intercalate(?sep, nil, nil) <-;
    IntercalateConsCons @ intercalate(?sep, cons(?x_1, cons(?x_2, ?xs)), cons(?x_1, cons(?sep, ?ys))) <- intercalate(?sep, cons(?x_2, ?xs), ?ys);
    IntercalateConsNil @ intercalate(?sep, cons(?x, nil), cons(?x, nil)) <-;

    NonEmpty @ nonempty(cons(?x, ?xs)) <-;

    LatexInt @ latex(?i, ?l) <- int(?i), tostring(?i, ?l);
    LatexFloat @ latex(?f, ?l) <- float(?f), tostring(?f, ?l);
    LatexStr @ latex(?s, ?l) <- str(?s), escapestring(?s, ?l_1), latexifystring(?s, ?l_2), join(["\\\\texttt{\\"", ?l_2, "\\"}"], ?l);
    LatexMeta @ latex(metavariable(?l), ?l) <-;
    LatexLit @ latex(lit(?i), ?l) <- latex(?i, ?l);
    LatexVar @ latex(var(?s), ?l) <- latex(?s, ?l);
    LatexPlus @ latex(plus(?e_1, ?e_2), ?l) <-
        latex(?e_1, ?l_1), latex(?e_2, ?l_2),
        parenth(?e_1, plus(?e_1, ?e_2), left, ?l_1, ?lp_1),
        parenth(?e_2, plus(?e_1, ?e_2), right, ?l_2, ?lp_2),
        join([?lp_1, " + ", ?lp_2], ?l);
    LatexPair @ latex(pair(?e_1, ?e_2), ?l) <- latex(?e_1, ?l_1), latex(?e_2, ?l_2), join(["(", ?l_1, ",  ", ?l_2, ")"], ?l);
    LatexAbs @ latex(abs(?x, ?t, ?e), ?l) <- latex(?e, ?l_e), latex(?t, ?l_t), latex(?x, ?l_x), join(["\\\\lambda ", ?l_x, " : ", ?l_t, " . ", ?l_e], ?l);
    LatexApp @ latex(app(?e_1, ?e_2), ?l) <-
        latex(?e_1, ?l_1), latex(?e_2, ?l_2),
        parenth(?e_1, app(?e_1, ?e_2), left, ?l_1, ?lp_1),
        parenth(?e_2, app(?e_1, ?e_2), right, ?l_2, ?lp_2),
        join([?lp_1, " \\\\enspace ", ?lp_2], ?l);

    LatexTInt @ latex(tint, "\\\\text{tint}") <-;
    LatexTStr @ latex(tstr, "\\\\text{tstr}") <-;
    LatexTArr @ latex(tarr(?t_1, ?t_2), ?l) <-
        latex(?t_1, ?l_1), latex(?t_2, ?l_2),
        parenth(?t_1, tarr(?t_1, ?t_2), left, ?l_1, ?lp_1),
        parenth(?t_2, tarr(?t_1, ?t_2), right, ?l_2, ?lp_2),
        join([?lp_1, " \\\\to ", ?lp_2], ?l);
    LatexTPair @ latex(tpair(?t_1, ?t_2), ?l) <- latex(?t_1, ?l_1), latex(?t_2, ?l_2), join(["(", ?l_1, ", ", ?l_2, ")"], ?l);

    LatexTypeEmpty @ latex(empty, "\\\\varnothing") <-;
    LatexTypeExtend @ latex(extend(?a, ?b, ?c), ?l) <- latex(?a, ?l_a), latex(?b, ?l_b), latex(?c, ?l_c), join([?l_a, " , ", ?l_b, " : ", ?l_c], ?l);
    LatexTypeInenv @ latex(inenv(?x, ?t, ?G), ?l) <-latex(?x, ?l_x), latex(?t, ?l_t), latex(?G, ?l_G), join([?l_x, " : ", ?l_t, " \\\\in ", ?l_G], ?l);

    LatexTypeBin @ latex(type(?e, ?t), ?l) <- latex(?e, ?l_e), latex(?t, ?l_t), join([?l_e, " : ", ?l_t], ?l);
    LatexTypeTer @ latex(type(?G, ?e, ?t), ?l) <- latex(?G, ?l_G), latex(?e, ?l_e), latex(?t, ?l_t), join([?l_G, " \\\\vdash ", ?l_e, " : ", ?l_t], ?l);

    LatexConverts @ latex(converts(?f, ?t), ?l) <- latex(?f, ?l_f), latex(?t, ?l_t), join([?l_f, " \\\\preceq ", ?l_t], ?l);

    LatexIsInt @ latex(int(?e), ?l) <- latex(?e, ?l_e), join([?l_e, " \\\\in \\\\texttt{Int}"], ?l);
    LatexIsFloat @ latex(float(?e), ?l) <- latex(?e, ?l_e), join([?l_e, " \\\\in \\\\texttt{Float}"], ?l);
    LatexIsNum @ latex(num(?e), ?l) <- latex(?e, ?l_e), join([?l_e, " \\\\in \\\\texttt{Num}"], ?l);
    LatexIsStr @ latex(str(?e), ?l) <- latex(?e, ?l_e), join([?l_e, " \\\\in \\\\texttt{Str}"], ?l);
    LatexSym @ latex(?s, ?l) <- sym(?s), tostring(?s, ?l_1), join(["\\\\text{", ?l_1,"}"], ?l);
    LatexCall @ latex(?c, ?l) <- call(?c, ?n, ?ts), nonempty(?ts), latexlist(?ts, ?lts_1), intercalate(", ", ?lts_1, ?lts_2), join(?lts_2, ?lts_3), join(["\\\\text{", ?n, "}", "(", ?lts_3, ")"], ?l);
`;

const loadedWidgets = {};
const getButtons = (inputGroup) => {
    return {
        play: inputGroup.querySelector(".bergamot-play"),
        reset: inputGroup.querySelector(".bergamot-reset"),
        close: inputGroup.querySelector(".bergamot-close"),
    }
}
const setRunning = (inputGroup, running) => {
    if (inputGroup !== null) {
        const buttons = getButtons(inputGroup);
        if (buttons.play) buttons.play.classList.toggle("bergamot-hidden", running);
        if (buttons.reset) buttons.reset.classList.toggle("bergamot-hidden", !running);
        if (buttons.close) buttons.close.classList.toggle("bergamot-hidden", !running);
    }
}

// The object language parsing is handling by a separate standalone Elm
// application in the ObjectLanguage module, which has two ports:
//
// * `parseString` requests a string to be parsed
// * `parsedString` returns the parsed string, or null
//
// We want there to be a single global ObjectLanguage object, but it works
// on a "subscription" model (we have to give a callback to its port).
// Configure this callback to invoke `resolve` functions from a list,
// so that callers can just get a promise. This way we aren't continuously
// registering more and more handlers for each parsed string, and we can
// use a convenient promise API.
const parsingPromiseResolvers = {};
const ensureObjectLanguage = () => {
    if (!window.Bergamot.ObjectLanguage) {
        window.Bergamot.ObjectLanguage = Elm.Bergamot.ObjectLanguage.init({});
        window.Bergamot.ObjectLanguage.ports.parsedString.subscribe(({ string, term }) => {
           if (string in parsingPromiseResolvers) {
              for (const resolver of parsingPromiseResolvers[string]) {
                resolver(term);
              }
              parsingPromiseResolvers[string] = [];
           }
        });
    }
    return window.Bergamot.ObjectLanguage;
}
const parseString = (str) => {
    if (!(str in parsingPromiseResolvers)) {
        parsingPromiseResolvers[str] = [];
    }

    return new Promise(resolve => {
        parsingPromiseResolvers[str].push(resolve);
        ensureObjectLanguage().ports.parseString.send(str);
    });
}

window.Bergamot = {};
window.Bergamot.run = (inputGroup, nodeId, inputPrompt, rules, renderRules, input) => {
    var app = Elm.Main.init({
        node: document.getElementById(nodeId),
        flags: {
            inputModes: {
                "Languge Term": { "custom": "Language Term" },
                "Query": "query"
            },
            renderRules, rules, input
        }
    });
    app.ports.convertInput.subscribe(async ({ mode, input }) => {
        let query = await parseString(input);
        if (query !== null) {
            query = inputPrompt.replace("TERM", query);
            app.ports.receiveConverted.send({ input, result: { query } });
        } else {
            app.ports.receiveConverted.send({ input, result: { error: "Unable to parse object language term" } });
        }
    });
    loadedWidgets[nodeId] = { app, parentNode: inputGroup ? inputGroup.parentElement : null };
    setRunning(inputGroup, true);
};
window.Bergamot.runPreset = (inputGroup, nodeId, presetName) => {
    const preset = window.Bergamot.presets[presetName];
    window.Bergamot.run(inputGroup, nodeId, preset.inputPrompt, preset.rules, renderRules, preset.query || "");
};
window.Bergamot.close = (inputGroup, nodeId) => {
    if (!(nodeId in loadedWidgets)) return;

    const placeholderDiv = document.createElement('div');
    placeholderDiv.id = nodeId;

    const widget = loadedWidgets[nodeId];
    const elmRoot = widget.parentNode.querySelector(".bergamot-root");
    elmRoot.replaceWith(placeholderDiv)
    delete loadedWidgets[nodeId];
    setRunning(inputGroup, false);
}
window.Bergamot.presets = {};

</script>