61 lines
2.4 KiB
JavaScript
61 lines
2.4 KiB
JavaScript
import { getActiveElement } from "../shared/getActiveElement.js";
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//#region src/NavigationMenu/utils.ts
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function getOpenState(open) {
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return open ? "open" : "closed";
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}
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function makeTriggerId(baseId, value) {
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return `${baseId}-trigger-${value}`;
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}
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function makeContentId(baseId, value) {
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return `${baseId}-content-${value}`;
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}
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const LINK_SELECT = "navigationMenu.linkSelect";
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const EVENT_ROOT_CONTENT_DISMISS = "navigationMenu.rootContentDismiss";
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/**
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* Returns a list of potential tabbable candidates.
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*
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* NOTE: This is only a close approximation. For example it doesn't take into account cases like when
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* elements are not visible. This cannot be worked out easily by just reading a property, but rather
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* necessitate runtime knowledge (computed styles, etc). We deal with these cases separately.
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*
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* See: https://developer.mozilla.org/en-US/docs/Web/API/TreeWalker
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* Credit: https://github.com/discord/focus-layers/blob/master/src/util/wrapFocus.tsx#L1
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*/
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function getTabbableCandidates(container) {
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const nodes = [];
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const walker = document.createTreeWalker(container, NodeFilter.SHOW_ELEMENT, { acceptNode: (node) => {
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const isHiddenInput = node.tagName === "INPUT" && node.type === "hidden";
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if (node.disabled || node.hidden || isHiddenInput) return NodeFilter.FILTER_SKIP;
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return node.tabIndex >= 0 ? NodeFilter.FILTER_ACCEPT : NodeFilter.FILTER_SKIP;
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} });
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while (walker.nextNode()) nodes.push(walker.currentNode);
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return nodes;
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}
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function focusFirst(candidates) {
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const previouslyFocusedElement = getActiveElement();
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return candidates.some((candidate) => {
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if (candidate === previouslyFocusedElement) return true;
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candidate.focus();
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return getActiveElement() !== previouslyFocusedElement;
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});
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}
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function removeFromTabOrder(candidates) {
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candidates.forEach((candidate) => {
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candidate.dataset.tabindex = candidate.getAttribute("tabindex") || "";
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candidate.setAttribute("tabindex", "-1");
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});
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return () => {
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candidates.forEach((candidate) => {
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const prevTabIndex = candidate.dataset.tabindex;
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candidate.setAttribute("tabindex", prevTabIndex);
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});
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};
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}
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function whenMouse(handler) {
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return (event) => event.pointerType === "mouse" ? handler(event) : void 0;
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}
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//#endregion
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export { EVENT_ROOT_CONTENT_DISMISS, LINK_SELECT, focusFirst, getOpenState, getTabbableCandidates, makeContentId, makeTriggerId, removeFromTabOrder, whenMouse };
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//# sourceMappingURL=utils.js.map
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