@atlaskit/breadcrumbs
Version:
Breadcrumbs are a navigation system used to show a user's location in a site or app.
198 lines (191 loc) • 7.96 kB
JavaScript
;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = useOverflowCollapse;
var _slicedToArray2 = _interopRequireDefault(require("@babel/runtime/helpers/slicedToArray"));
var _react = require("react");
function _createForOfIteratorHelper(r, e) { var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (!t) { if (Array.isArray(r) || (t = _unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) { t && (r = t); var _n = 0, F = function F() {}; return { s: F, n: function n() { return _n >= r.length ? { done: !0 } : { done: !1, value: r[_n++] }; }, e: function e(r) { throw r; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var o, a = !0, u = !1; return { s: function s() { t = t.call(r); }, n: function n() { var r = t.next(); return a = r.done, r; }, e: function e(r) { u = !0, o = r; }, f: function f() { try { a || null == t.return || t.return(); } finally { if (u) throw o; } } }; }
function _unsupportedIterableToArray(r, a) { if (r) { if ("string" == typeof r) return _arrayLikeToArray(r, a); var t = {}.toString.call(r).slice(8, -1); return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0; } }
function _arrayLikeToArray(r, a) { (null == a || a > r.length) && (a = r.length); for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e]; return n; }
// The ellipsis trigger is a compact IconButton (24px) plus the trailing separator (24px).
var ELLIPSIS_WIDTH_ESTIMATE = 48;
// Measurements need layout timing in the browser, but should be a no-op for SSR.
var useLayoutEffect = typeof window === 'undefined' ? _react.useEffect : _react.useLayoutEffect;
function setsEqual(a, b) {
if (a.size !== b.size) {
return false;
}
var _iterator = _createForOfIteratorHelper(a),
_step;
try {
for (_iterator.s(); !(_step = _iterator.n()).done;) {
var v = _step.value;
if (!b.has(v)) {
return false;
}
}
} catch (err) {
_iterator.e(err);
} finally {
_iterator.f();
}
return true;
}
function getMiddleOutCollapseOrder(itemCount) {
var lastIndex = itemCount - 1;
var middleIndex = Math.floor((itemCount - 1) / 2);
var collapseOrder = [];
if (middleIndex > 0 && middleIndex < lastIndex) {
collapseOrder.push(middleIndex);
}
for (var distance = 1; distance < itemCount; distance++) {
var leftIndex = middleIndex - distance;
var rightIndex = middleIndex + distance;
if (leftIndex > 0) {
collapseOrder.push(leftIndex);
}
if (rightIndex < lastIndex) {
collapseOrder.push(rightIndex);
}
}
return collapseOrder;
}
// eslint-disable-next-line @repo/internal/react/require-jsdoc
function useOverflowCollapse(itemCount) {
var itemRefs = (0, _react.useRef)([]);
var containerRef = (0, _react.useRef)(null);
var naturalWidths = (0, _react.useRef)([]);
var naturalWidthsReady = (0, _react.useRef)(false);
var _useState = (0, _react.useState)(false),
_useState2 = (0, _slicedToArray2.default)(_useState, 2),
naturalWidthsReadyState = _useState2[0],
setNaturalWidthsReadyState = _useState2[1];
var _useState3 = (0, _react.useState)(new Set()),
_useState4 = (0, _slicedToArray2.default)(_useState3, 2),
collapsedIndices = _useState4[0],
setCollapsedIndices = _useState4[1];
// Intentionally runs after each render until refs have committed and natural widths are measured.
// eslint-disable-next-line react-hooks/exhaustive-deps
useLayoutEffect(function () {
if (naturalWidthsReady.current) {
return;
}
var widths = itemRefs.current.map(function (el) {
var _el$offsetWidth;
return (_el$offsetWidth = el === null || el === void 0 ? void 0 : el.offsetWidth) !== null && _el$offsetWidth !== void 0 ? _el$offsetWidth : 0;
});
if (widths.some(function (w) {
return w > 0;
})) {
naturalWidths.current = widths;
naturalWidthsReady.current = true;
setNaturalWidthsReadyState(true);
}
});
var recalculate = (0, _react.useCallback)(function () {
var container = containerRef.current;
if (!container || !naturalWidthsReady.current) {
return;
}
var availableWidth = container.offsetWidth;
var widths = naturalWidths.current;
if (itemCount <= 2) {
setCollapsedIndices(function (prev) {
return prev.size === 0 ? prev : new Set();
});
return;
}
var totalWidth = widths.reduce(function (sum, w) {
return sum + w;
}, 0);
if (totalWidth <= availableWidth) {
setCollapsedIndices(function (prev) {
return prev.size === 0 ? prev : new Set();
});
return;
}
var usedWidth = totalWidth;
var newCollapsed = new Set();
var _iterator2 = _createForOfIteratorHelper(getMiddleOutCollapseOrder(itemCount)),
_step2;
try {
for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
var _widths$index;
var index = _step2.value;
if (newCollapsed.size === 0) {
usedWidth += ELLIPSIS_WIDTH_ESTIMATE;
}
newCollapsed.add(index);
usedWidth -= (_widths$index = widths[index]) !== null && _widths$index !== void 0 ? _widths$index : 0;
if (usedWidth <= availableWidth) {
break;
}
}
// At the smallest sizes, even first + ellipsis + last may not fit.
// In that case, also collapse the first item so only ellipsis + last is shown.
// Note: this branch is only reachable when itemCount > 2 (the early return above
// handles itemCount <= 2), so collapsing index 0 here always leaves at least one
// visible item (the last) plus the ellipsis trigger.
} catch (err) {
_iterator2.e(err);
} finally {
_iterator2.f();
}
if (usedWidth > availableWidth) {
newCollapsed.add(0);
}
setCollapsedIndices(function (prev) {
return setsEqual(prev, newCollapsed) ? prev : newCollapsed;
});
}, [itemCount]);
var registerItem = (0, _react.useCallback)(function (index) {
return function (el) {
itemRefs.current[index] = el;
};
}, []);
var observerRef = (0, _react.useRef)(null);
var registerContainer = (0, _react.useCallback)(function (el) {
var _observerRef$current;
// Disconnect any existing observer
(_observerRef$current = observerRef.current) === null || _observerRef$current === void 0 || _observerRef$current.disconnect();
containerRef.current = el;
if (!el) {
return;
}
if (typeof ResizeObserver === 'undefined') {
return;
}
// Set up ResizeObserver immediately when container mounts
var observer = new ResizeObserver(function () {
recalculate();
});
observer.observe(el);
observerRef.current = observer;
}, [recalculate]);
(0, _react.useEffect)(function () {
if (naturalWidthsReadyState) {
recalculate();
}
}, [naturalWidthsReadyState, recalculate]);
// Cleanup observer on unmount
(0, _react.useEffect)(function () {
return function () {
var _observerRef$current2;
(_observerRef$current2 = observerRef.current) === null || _observerRef$current2 === void 0 || _observerRef$current2.disconnect();
};
}, []);
(0, _react.useEffect)(function () {
naturalWidthsReady.current = false;
naturalWidths.current = [];
setNaturalWidthsReadyState(false);
setCollapsedIndices(new Set());
}, [itemCount]);
return {
collapsedIndices: collapsedIndices,
naturalWidthsReady: naturalWidthsReadyState,
registerItem: registerItem,
registerContainer: registerContainer
};
}