52 lines
1.9 KiB
JavaScript
52 lines
1.9 KiB
JavaScript
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import * as React from 'react';
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// recursion (flat tree structure)
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function fillRecords(list, record, indent, childrenColumnName, expandedKeys, getRowKey, index) {
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list.push({
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record: record,
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indent: indent,
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index: index
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});
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var key = getRowKey(record);
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var expanded = expandedKeys === null || expandedKeys === void 0 ? void 0 : expandedKeys.has(key);
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if (record && Array.isArray(record[childrenColumnName]) && expanded) {
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// expanded state, flat record
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for (var i = 0; i < record[childrenColumnName].length; i += 1) {
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fillRecords(list, record[childrenColumnName][i], indent + 1, childrenColumnName, expandedKeys, getRowKey, i);
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}
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}
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}
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/**
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* flat tree data on expanded state
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*
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* @export
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* @template T
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* @param {*} data : table data
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* @param {string} childrenColumnName : 指定树形结构的列名
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* @param {Set<Key>} expandedKeys : 展开的行对应的keys
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* @param {GetRowKey<T>} getRowKey : 获取当前rowKey的方法
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* @returns flattened data
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*/
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export default function useFlattenRecords(data, childrenColumnName, expandedKeys, getRowKey) {
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var arr = React.useMemo(function () {
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if (expandedKeys !== null && expandedKeys !== void 0 && expandedKeys.size) {
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var list = [];
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// collect flattened record
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for (var i = 0; i < (data === null || data === void 0 ? void 0 : data.length); i += 1) {
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var record = data[i];
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// using array.push or spread operator may cause "Maximum call stack size exceeded" exception if array size is big enough.
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fillRecords(list, record, 0, childrenColumnName, expandedKeys, getRowKey, i);
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}
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return list;
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}
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return data === null || data === void 0 ? void 0 : data.map(function (item, index) {
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return {
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record: item,
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indent: 0,
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index: index
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};
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});
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}, [data, childrenColumnName, expandedKeys, getRowKey]);
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return arr;
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}
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