--- /dev/null
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+ value: true
+});
+
+var _lodash = require('lodash');
+
+var _lodash2 = _interopRequireDefault(_lodash);
+
+var _calculateCellHeight = require('./calculateCellHeight');
+
+var _calculateCellHeight2 = _interopRequireDefault(_calculateCellHeight);
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Calculates the vertical row span index.
+ *
+ * @param {Array[]} rows
+ * @param {Object} config
+ * @returns {number[]}
+ */
+exports.default = (rows, config) => {
+ const tableWidth = rows[0].length;
+
+ const rowSpanIndex = [];
+
+ rows.forEach(cells => {
+ const cellHeightIndex = Array(tableWidth).fill(1);
+
+ cells.forEach((value, index1) => {
+ if (!_lodash2.default.isNumber(config.columns[index1].width)) {
+ throw new TypeError('column[index].width must be a number.');
+ }
+
+ if (!_lodash2.default.isBoolean(config.columns[index1].wrapWord)) {
+ throw new TypeError('column[index].wrapWord must be a boolean.');
+ }
+
+ cellHeightIndex[index1] = (0, _calculateCellHeight2.default)(value, config.columns[index1].width, config.columns[index1].wrapWord);
+ });
+
+ rowSpanIndex.push(_lodash2.default.max(cellHeightIndex));
+ });
+
+ return rowSpanIndex;
+};
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