110 lines
4.8 KiB
JavaScript
110 lines
4.8 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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Object.defineProperty(exports, "useFlatTreeNavigation", {
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enumerable: true,
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get: function() {
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return useFlatTreeNavigation;
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}
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});
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const _interop_require_wildcard = require("@swc/helpers/_/_interop_require_wildcard");
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const _reactutilities = require("@fluentui/react-utilities");
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const _nextTypeAheadElement = require("../utils/nextTypeAheadElement");
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const _tokens = require("../utils/tokens");
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const _useRovingTabIndexes = require("./useRovingTabIndexes");
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const _getTreeItemValueFromElement = require("../utils/getTreeItemValueFromElement");
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const _react = /*#__PURE__*/ _interop_require_wildcard._(require("react"));
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const _useHTMLElementWalkerRef = require("./useHTMLElementWalkerRef");
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function useFlatTreeNavigation() {
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'use no memo';
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const { walkerRef, rootRef: walkerRootRef } = (0, _useHTMLElementWalkerRef.useHTMLElementWalkerRef)();
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const { rove, initialize: initializeRovingTabIndex } = (0, _useRovingTabIndexes.useRovingTabIndex)();
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const rootRefCallback = _react.useCallback((root)=>{
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if (walkerRef.current && root) {
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initializeRovingTabIndex(walkerRef.current);
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}
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}, [
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initializeRovingTabIndex,
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walkerRef
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]);
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function getNextElement(data) {
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if (!walkerRef.current) {
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return null;
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}
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switch(data.type){
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case _tokens.treeDataTypes.Click:
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return data.target;
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case _tokens.treeDataTypes.TypeAhead:
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walkerRef.current.currentElement = data.target;
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return (0, _nextTypeAheadElement.nextTypeAheadElement)(walkerRef.current, data.event.key);
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case _tokens.treeDataTypes.ArrowLeft:
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{
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const nextElement = parentElement(data.parentValue, walkerRef.current);
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if (!nextElement && process.env.NODE_ENV !== 'production') {
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// eslint-disable-next-line no-console
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console.warn(`@fluentui/react-tree [useFlatTreeNavigation]:
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\'ArrowLeft\' navigation was not possible.
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No parent element found for the current element:`, data.target);
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}
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return nextElement;
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}
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case _tokens.treeDataTypes.ArrowRight:
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{
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walkerRef.current.currentElement = data.target;
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const nextElement = firstChild(data.target, walkerRef.current);
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if (!nextElement && process.env.NODE_ENV !== 'production') {
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const ariaLevel = Number(data.target.getAttribute('aria-level'));
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// eslint-disable-next-line no-console
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console.warn(`@fluentui/react-tree [useFlatTreeNavigation]:
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\'ArrowRight\' navigation was not possible.
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No element with "aria-posinset=1" and "aria-level=${ariaLevel + 1}"
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was found after the current element!`, data.target);
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}
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return nextElement;
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}
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case _tokens.treeDataTypes.End:
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walkerRef.current.currentElement = walkerRef.current.root;
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return walkerRef.current.lastChild();
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case _tokens.treeDataTypes.Home:
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walkerRef.current.currentElement = walkerRef.current.root;
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return walkerRef.current.firstChild();
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case _tokens.treeDataTypes.ArrowDown:
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walkerRef.current.currentElement = data.target;
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return walkerRef.current.nextElement();
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case _tokens.treeDataTypes.ArrowUp:
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walkerRef.current.currentElement = data.target;
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return walkerRef.current.previousElement();
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}
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}
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const navigate = (0, _reactutilities.useEventCallback)((data)=>{
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const nextElement = getNextElement(data);
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if (nextElement) {
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rove(nextElement);
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}
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});
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return {
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navigate,
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rootRef: (0, _reactutilities.useMergedRefs)(walkerRootRef, rootRefCallback)
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};
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}
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function firstChild(target, treeWalker) {
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const nextElement = treeWalker.nextElement();
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if (!nextElement) {
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return null;
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}
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const nextElementAriaPosInSet = nextElement.getAttribute('aria-posinset');
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const nextElementAriaLevel = nextElement.getAttribute('aria-level');
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const targetAriaLevel = target.getAttribute('aria-level');
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if (nextElementAriaPosInSet === '1' && Number(nextElementAriaLevel) === Number(targetAriaLevel) + 1) {
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return nextElement;
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}
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return null;
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}
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function parentElement(parentValue, treeWalker) {
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if (parentValue === undefined) {
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return null;
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}
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return treeWalker.root.querySelector(`[${_getTreeItemValueFromElement.dataTreeItemValueAttrName}="${parentValue}"]`);
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}
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