focus-lock
Version:
DOM trap for a focus
55 lines (54 loc) • 1.9 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.getAllAffectedNodes = void 0;
var constants_1 = require("../constants");
var array_1 = require("./array");
/**
* in case of multiple nodes nested inside each other
* keeps only top ones
* this is O(nlogn)
* @param nodes
* @returns {*}
*/
var filterNested = function (nodes) {
var contained = new Set();
var l = nodes.length;
for (var i = 0; i < l; i += 1) {
for (var j = i + 1; j < l; j += 1) {
var position = nodes[i].compareDocumentPosition(nodes[j]);
/* eslint-disable no-bitwise */
if ((position & Node.DOCUMENT_POSITION_CONTAINED_BY) > 0) {
contained.add(j);
}
if ((position & Node.DOCUMENT_POSITION_CONTAINS) > 0) {
contained.add(i);
}
/* eslint-enable */
}
}
return nodes.filter(function (_, index) { return !contained.has(index); });
};
/**
* finds top most parent for a node
* @param node
* @returns {*}
*/
var getTopParent = function (node) {
return node.parentNode ? getTopParent(node.parentNode) : node;
};
/**
* returns all "focus containers" inside a given node
* @param node - node or nodes to look inside
* @returns Element[]
*/
var getAllAffectedNodes = function (node) {
var nodes = (0, array_1.asArray)(node);
return nodes.filter(Boolean).reduce(function (acc, currentNode) {
var group = currentNode.getAttribute(constants_1.FOCUS_GROUP);
acc.push.apply(acc, (group
? filterNested((0, array_1.toArray)(getTopParent(currentNode).querySelectorAll("[".concat(constants_1.FOCUS_GROUP, "=\"").concat(group, "\"]:not([").concat(constants_1.FOCUS_DISABLED, "=\"disabled\"])"))))
: [currentNode]));
return acc;
}, []);
};
exports.getAllAffectedNodes = getAllAffectedNodes;