private function calculateColumnsWidth($rows)
    {
        for ($column = 0; $column < $this->numberOfColumns; ++$column) {
            $lengths = array();
            foreach ($rows as $row) {
                if ($row instanceof TableSeparator) {
                    continue;
                }

                foreach ($row as $i => $cell) {
                    if ($cell instanceof TableCell) {
                        $textContent = Helper::removeDecoration($this->output->getFormatter(), $cell);
                        $textLength = Helper::strlen($textContent);
                        if ($textLength > 0) {
                            $contentColumns = str_split($textContent, ceil($textLength / $cell->getColspan()));
                            foreach ($contentColumns as $position => $content) {
                                $row[$i + $position] = $content;
                            }
                        }
                    }
                }

                $lengths[] = $this->getCellWidth($row, $column);
            }

            $this->effectiveColumnWidths[$column] = max($lengths) + strlen($this->style->getCellRowContentFormat()) - 2;
        }
    }