@josmangarsal/pragmatic-scheduler/dist/hooks/useEllipsisObserver.js

React resource scheduler

"use strict";
var __read = (this && this.__read) || function (o, n) {
    var m = typeof Symbol === "function" && o[Symbol.iterator];
    if (!m) return o;
    var i = m.call(o), r, ar = [], e;
    try {
        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
    }
    catch (error) { e = { error: error }; }
    finally {
        try {
            if (r && !r.done && (m = i["return"])) m.call(i);
        }
        finally { if (e) throw e.error; }
    }
    return ar;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.useEllipsisObserver = void 0;
var react_1 = require("react");
var useEllipsisObserver = function (ref) {
    var _a = __read((0, react_1.useState)(false), 2), isEllipsis = _a[0], setIsEllipsis = _a[1];
    (0, react_1.useEffect)(function () {
        var el = ref.current;
        if (!el)
            return;
        var getLeafElements = function (node) {
            var leafNodes = [];
            var traverse = function (n) {
                if (!(n instanceof HTMLElement))
                    return;
                var childElements = Array.from(n.children).filter(function (c) { return c instanceof HTMLElement; });
                if (childElements.length === 0 && n.classList.contains('ellipsisText')) {
                    leafNodes.push(n);
                }
                else {
                    childElements.forEach(traverse);
                }
            };
            traverse(node);
            return leafNodes;
        };
        var checkEllipsis = function () {
            var leafElements = getLeafElements(el);
            var hasEllipsis = leafElements.some(function (child) { return child.scrollWidth > child.offsetWidth; });
            setIsEllipsis(hasEllipsis);
        };
        checkEllipsis();
        var resizeObserver = new ResizeObserver(checkEllipsis);
        resizeObserver.observe(el);
        return function () {
            resizeObserver.disconnect();
        };
    }, [ref]);
    return {
        isEllipsis: isEllipsis,
    };
};
exports.useEllipsisObserver = useEllipsisObserver;