rich-text-editor/dist/app/hooks/use-mathquill.js

Rich text editor

"use strict";
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    var desc = Object.getOwnPropertyDescriptor(m, k);
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      desc = { enumerable: true, get: function() { return m[k]; } };
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    Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
    if (k2 === undefined) k2 = k;
    o[k2] = m[k];
}));
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    Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
    o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
    var ownKeys = function(o) {
        ownKeys = Object.getOwnPropertyNames || function (o) {
            var ar = [];
            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
            return ar;
        };
        return ownKeys(o);
    };
    return function (mod) {
        if (mod && mod.__esModule) return mod;
        var result = {};
        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
        __setModuleDefault(result, mod);
        return result;
    };
})();
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = useMathQuill;
const MathQuill = __importStar(require("@digabi/mathquill"));
const react_1 = require("react");
const use_rerender_1 = __importDefault(require("./use-rerender"));
const MQ = MathQuill.getInterface(2);
function useMathQuill(opts) {
    // We use `MathField.latex()` to check for errors below, but setting the
    // `MathField` latex value does not cause a rerender as React's not aware
    // of the update. This means that when we set the latex value inside the
    // `MathField` object, we need to request a rerender from React. The more
    // "correct" way to do this would probably be to sync React with the object
    // through `React.useSyncExternalStore` but we pinky-promise to always
    // manually call the `rerender` function every time after calling the
    // `MathField.latex(…)` setter, so React's in-sync with MathQuill.
    const rerender = (0, use_rerender_1.default)();
    const [mqHandle, setMqHandle] = (0, react_1.useState)(null);
    const [lastLatex, setLastLatex] = (0, react_1.useState)(opts.latex);
    // These refs are needed to access the current state values inside event handler
    const mqRef = (0, react_1.useRef)(null);
    const lastLatexRef = (0, react_1.useRef)(lastLatex);
    // React `ref` objects aren't valid as `useEffect` deps; the official
    // workaround is to use a memoised callback as the `ref` prop to an element:
    const ref = (0, react_1.useCallback)(function spawnMathQuillOnElement(node) {
        if (!node)
            return;
        function edit(field) {
            var _a, _b;
            // We don't want to signal an event edit that didn't happen from user input *on the
            // `MathField`*, i.e. we don't want to call `onChange` when it's caused by the raw latex
            // changing (we'd end up in an infinite loop). The actual focused event is a hidden
            // textbox inside `field.el()` so we need to use the `.contains()` method.
            if (field.el().contains(document.activeElement)) {
                const newValue = (_a = mqRef.current) === null || _a === void 0 ? void 0 : _a.latex();
                if (newValue !== undefined) {
                    (_b = opts.onChange) === null || _b === void 0 ? void 0 : _b.call(opts, lastLatexRef.current, newValue);
                    setLastLatex(newValue);
                    lastLatexRef.current = newValue;
                }
            }
        }
        function enter() {
            var _a, _b;
            opts.onEnter((_b = (_a = mqRef.current) === null || _a === void 0 ? void 0 : _a.latex()) !== null && _b !== void 0 ? _b : '');
        }
        const field = MQ.MathField(node, { handlers: { edit, enter } });
        field.latex(opts.latex);
        setMqHandle(field);
        mqRef.current = field;
    }, []);
    (0, react_1.useEffect)(function updateMathQuillField() {
        if (mqHandle && mqHandle.latex() != opts.latex) {
            mqHandle === null || mqHandle === void 0 ? void 0 : mqHandle.latex(opts.latex);
            rerender();
        }
    }, [mqHandle, opts.latex]);
    return {
        /** A `ref` that must be attached to the `div` tag that should be controlled by MathQuill */
        ref,
        /** A MathQuill `MathField` that's attached to the `ref` */
        mq: mqHandle,
        /** Boolean representing if the current `latex` code is parseable by MathQuill */
        isError: (mqHandle === null || mqHandle === void 0 ? void 0 : mqHandle.latex()) === '' && opts.latex !== '',
        lastValue: lastLatex,
    };
}