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39 lines
1.0 KiB
39 lines
1.0 KiB
var hierarchy = require('./hierarchy');
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module.exports = function (root, options) {
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// separate into left and right trees
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var left = hierarchy(root.data, options, true); // root only
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var right = hierarchy(root.data, options, true); // root only
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// automatically
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var treeSize = root.children.length;
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var rightTreeSize = Math.round(treeSize / 2);
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// separate left and right tree by meta data
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var getSide = options.getSide || function (child, index) {
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if (index < rightTreeSize) {
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return 'right';
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}
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return 'left';
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};
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for (var i = 0; i < treeSize; i++) {
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var child = root.children[i];
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var side = getSide(child, i);
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if (side === 'right') {
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right.children.push(child);
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} else {
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left.children.push(child);
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}
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}
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left.eachNode(function (node) {
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if (!node.isRoot()) {
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node.side = 'left';
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}
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});
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right.eachNode(function (node) {
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if (!node.isRoot()) {
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node.side = 'right';
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}
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});
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return {
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left: left,
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right: right
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};
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};
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