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103 lines
3.0 KiB
103 lines
3.0 KiB
'use strict';
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Object.defineProperty(exports, '__esModule', { value: true });
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const obtainAllFocusableElements = (element) => {
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const nodes = [];
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const walker = document.createTreeWalker(element, NodeFilter.SHOW_ELEMENT, {
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acceptNode: (node) => {
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const isHiddenInput = node.tagName === "INPUT" && node.type === "hidden";
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if (node.disabled || node.hidden || isHiddenInput)
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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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});
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while (walker.nextNode())
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nodes.push(walker.currentNode);
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return nodes;
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};
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const getVisibleElement = (elements, container) => {
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for (const element of elements) {
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if (!isHidden(element, container))
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return element;
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}
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};
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const isHidden = (element, container) => {
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if (process.env.NODE_ENV === "test")
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return false;
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if (getComputedStyle(element).visibility === "hidden")
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return true;
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while (element) {
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if (container && element === container)
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return false;
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if (getComputedStyle(element).display === "none")
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return true;
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element = element.parentElement;
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}
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return false;
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};
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const getEdges = (container) => {
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const focusable = obtainAllFocusableElements(container);
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const first = getVisibleElement(focusable, container);
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const last = getVisibleElement(focusable.reverse(), container);
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return [first, last];
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};
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const isSelectable = (element) => {
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return element instanceof HTMLInputElement && "select" in element;
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};
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const tryFocus = (element, shouldSelect) => {
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if (element && element.focus) {
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const prevFocusedElement = document.activeElement;
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element.focus({ preventScroll: true });
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if (element !== prevFocusedElement && isSelectable(element) && shouldSelect) {
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element.select();
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}
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}
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};
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function removeFromStack(list, item) {
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const copy = [...list];
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const idx = list.indexOf(item);
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if (idx !== -1) {
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copy.splice(idx, 1);
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}
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return copy;
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}
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const createFocusableStack = () => {
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let stack = [];
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const push = (layer) => {
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const currentLayer = stack[0];
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if (currentLayer && layer !== currentLayer) {
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currentLayer.pause();
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}
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stack = removeFromStack(stack, layer);
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stack.unshift(layer);
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};
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const remove = (layer) => {
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var _a, _b;
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stack = removeFromStack(stack, layer);
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(_b = (_a = stack[0]) == null ? void 0 : _a.resume) == null ? void 0 : _b.call(_a);
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};
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return {
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push,
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remove
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};
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};
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const focusFirstDescendant = (elements, shouldSelect = false) => {
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const prevFocusedElement = document.activeElement;
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for (const element of elements) {
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tryFocus(element, shouldSelect);
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if (document.activeElement !== prevFocusedElement)
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return;
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}
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};
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const focusableStack = createFocusableStack();
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exports.focusFirstDescendant = focusFirstDescendant;
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exports.focusableStack = focusableStack;
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exports.getEdges = getEdges;
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exports.getVisibleElement = getVisibleElement;
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exports.isHidden = isHidden;
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exports.obtainAllFocusableElements = obtainAllFocusableElements;
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exports.tryFocus = tryFocus;
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//# sourceMappingURL=utils.js.map
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