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import { getNodeChildren, convertTreeToEntities } from '../vc-tree/src/util';
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import { getSlots } from '../_util/props-util';
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const Record = {
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None: 'node',
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Start: 'start',
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End: 'end',
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};
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// TODO: Move this logic into `rc-tree`
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function traverseNodesKey(rootChildren, callback) {
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const nodeList = getNodeChildren(rootChildren) || [];
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function processNode(node) {
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const { key } = node;
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const children = getSlots(node).default;
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if (callback(key) !== false) {
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traverseNodesKey(typeof children === 'function' ? children() : children, callback);
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}
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}
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nodeList.forEach(processNode);
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}
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export function getFullKeyList(children) {
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const { keyEntities } = convertTreeToEntities(children);
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return [...keyEntities.keys()];
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}
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/** 计算选中范围，只考虑expanded情况以优化性能 */
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export function calcRangeKeys(rootChildren, expandedKeys, startKey, endKey) {
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const keys = [];
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let record = Record.None;
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if (startKey && startKey === endKey) {
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return [startKey];
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}
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if (!startKey || !endKey) {
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return [];
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}
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function matchKey(key) {
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return key === startKey || key === endKey;
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}
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traverseNodesKey(rootChildren, key => {
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if (record === Record.End) {
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return false;
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}
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if (matchKey(key)) {
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// Match test
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keys.push(key);
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if (record === Record.None) {
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record = Record.Start;
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} else if (record === Record.Start) {
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record = Record.End;
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return false;
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}
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} else if (record === Record.Start) {
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// Append selection
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keys.push(key);
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}
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if (expandedKeys.indexOf(key) === -1) {
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return false;
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}
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return true;
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});
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return keys;
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}
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