<form method="POST">
    <h3>Editing: Table.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier &lt;fabien@symfony.com&gt;
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\Console\Helper;

use Symfony\Component\Console\Exception\InvalidArgumentException;
use Symfony\Component\Console\Exception\RuntimeException;
use Symfony\Component\Console\Formatter\OutputFormatter;
use Symfony\Component\Console\Formatter\WrappableOutputFormatterInterface;
use Symfony\Component\Console\Output\ConsoleSectionOutput;
use Symfony\Component\Console\Output\OutputInterface;

/**
 * Provides helpers to display a table.
 *
 * @author Fabien Potencier &lt;fabien@symfony.com&gt;
 * @author Саша Стаменковић &lt;umpirsky@gmail.com&gt;
 * @author Abdellatif Ait boudad &lt;a.aitboudad@gmail.com&gt;
 * @author Max Grigorian &lt;maxakawizard@gmail.com&gt;
 * @author Dany Maillard &lt;danymaillard93b@gmail.com&gt;
 */
class Table
{
    private const SEPARATOR_TOP = 0;
    private const SEPARATOR_TOP_BOTTOM = 1;
    private const SEPARATOR_MID = 2;
    private const SEPARATOR_BOTTOM = 3;
    private const BORDER_OUTSIDE = 0;
    private const BORDER_INSIDE = 1;

    private $headerTitle;
    private $footerTitle;

    /**
     * Table headers.
     */
    private $headers = [];

    /**
     * Table rows.
     */
    private $rows = [];
    private $horizontal = false;

    /**
     * Column widths cache.
     */
    private $effectiveColumnWidths = [];

    /**
     * Number of columns cache.
     *
     * @var int
     */
    private $numberOfColumns;

    /**
     * @var OutputInterface
     */
    private $output;

    /**
     * @var TableStyle
     */
    private $style;

    /**
     * @var array
     */
    private $columnStyles = [];

    /**
     * User set column widths.
     *
     * @var array
     */
    private $columnWidths = [];
    private $columnMaxWidths = [];

    /**
     * @var array&lt;string, TableStyle&gt;|null
     */
    private static $styles;

    private $rendered = false;

    public function __construct(OutputInterface $output)
    {
        $this-&gt;output = $output;

        if (!self::$styles) {
            self::$styles = self::initStyles();
        }

        $this-&gt;setStyle('default');
    }

    /**
     * Sets a style definition.
     */
    public static function setStyleDefinition(string $name, TableStyle $style)
    {
        if (!self::$styles) {
            self::$styles = self::initStyles();
        }

        self::$styles[$name] = $style;
    }

    /**
     * Gets a style definition by name.
     *
     * @return TableStyle
     */
    public static function getStyleDefinition(string $name)
    {
        if (!self::$styles) {
            self::$styles = self::initStyles();
        }

        if (isset(self::$styles[$name])) {
            return self::$styles[$name];
        }

        throw new InvalidArgumentException(sprintf('Style &quot;%s&quot; is not defined.', $name));
    }

    /**
     * Sets table style.
     *
     * @param TableStyle|string $name The style name or a TableStyle instance
     *
     * @return $this
     */
    public function setStyle($name)
    {
        $this-&gt;style = $this-&gt;resolveStyle($name);

        return $this;
    }

    /**
     * Gets the current table style.
     *
     * @return TableStyle
     */
    public function getStyle()
    {
        return $this-&gt;style;
    }

    /**
     * Sets table column style.
     *
     * @param TableStyle|string $name The style name or a TableStyle instance
     *
     * @return $this
     */
    public function setColumnStyle(int $columnIndex, $name)
    {
        $this-&gt;columnStyles[$columnIndex] = $this-&gt;resolveStyle($name);

        return $this;
    }

    /**
     * Gets the current style for a column.
     *
     * If style was not set, it returns the global table style.
     *
     * @return TableStyle
     */
    public function getColumnStyle(int $columnIndex)
    {
        return $this-&gt;columnStyles[$columnIndex] ?? $this-&gt;getStyle();
    }

    /**
     * Sets the minimum width of a column.
     *
     * @return $this
     */
    public function setColumnWidth(int $columnIndex, int $width)
    {
        $this-&gt;columnWidths[$columnIndex] = $width;

        return $this;
    }

    /**
     * Sets the minimum width of all columns.
     *
     * @return $this
     */
    public function setColumnWidths(array $widths)
    {
        $this-&gt;columnWidths = [];
        foreach ($widths as $index =&gt; $width) {
            $this-&gt;setColumnWidth($index, $width);
        }

        return $this;
    }

    /**
     * Sets the maximum width of a column.
     *
     * Any cell within this column which contents exceeds the specified width will be wrapped into multiple lines, while
     * formatted strings are preserved.
     *
     * @return $this
     */
    public function setColumnMaxWidth(int $columnIndex, int $width): self
    {
        if (!$this-&gt;output-&gt;getFormatter() instanceof WrappableOutputFormatterInterface) {
            throw new \LogicException(sprintf('Setting a maximum column width is only supported when using a &quot;%s&quot; formatter, got &quot;%s&quot;.', WrappableOutputFormatterInterface::class, get_debug_type($this-&gt;output-&gt;getFormatter())));
        }

        $this-&gt;columnMaxWidths[$columnIndex] = $width;

        return $this;
    }

    /**
     * @return $this
     */
    public function setHeaders(array $headers)
    {
        $headers = array_values($headers);
        if (!empty($headers) &amp;&amp; !\is_array($headers[0])) {
            $headers = [$headers];
        }

        $this-&gt;headers = $headers;

        return $this;
    }

    public function setRows(array $rows)
    {
        $this-&gt;rows = [];

        return $this-&gt;addRows($rows);
    }

    /**
     * @return $this
     */
    public function addRows(array $rows)
    {
        foreach ($rows as $row) {
            $this-&gt;addRow($row);
        }

        return $this;
    }

    /**
     * @return $this
     */
    public function addRow($row)
    {
        if ($row instanceof TableSeparator) {
            $this-&gt;rows[] = $row;

            return $this;
        }

        if (!\is_array($row)) {
            throw new InvalidArgumentException('A row must be an array or a TableSeparator instance.');
        }

        $this-&gt;rows[] = array_values($row);

        return $this;
    }

    /**
     * Adds a row to the table, and re-renders the table.
     *
     * @return $this
     */
    public function appendRow($row): self
    {
        if (!$this-&gt;output instanceof ConsoleSectionOutput) {
            throw new RuntimeException(sprintf('Output should be an instance of &quot;%s&quot; when calling &quot;%s&quot;.', ConsoleSectionOutput::class, __METHOD__));
        }

        if ($this-&gt;rendered) {
            $this-&gt;output-&gt;clear($this-&gt;calculateRowCount());
        }

        $this-&gt;addRow($row);
        $this-&gt;render();

        return $this;
    }

    /**
     * @return $this
     */
    public function setRow($column, array $row)
    {
        $this-&gt;rows[$column] = $row;

        return $this;
    }

    /**
     * @return $this
     */
    public function setHeaderTitle(?string $title): self
    {
        $this-&gt;headerTitle = $title;

        return $this;
    }

    /**
     * @return $this
     */
    public function setFooterTitle(?string $title): self
    {
        $this-&gt;footerTitle = $title;

        return $this;
    }

    /**
     * @return $this
     */
    public function setHorizontal(bool $horizontal = true): self
    {
        $this-&gt;horizontal = $horizontal;

        return $this;
    }

    /**
     * Renders table to output.
     *
     * Example:
     *
     *     +---------------+-----------------------+------------------+
     *     | ISBN          | Title                 | Author           |
     *     +---------------+-----------------------+------------------+
     *     | 99921-58-10-7 | Divine Comedy         | Dante Alighieri  |
     *     | 9971-5-0210-0 | A Tale of Two Cities  | Charles Dickens  |
     *     | 960-425-059-0 | The Lord of the Rings | J. R. R. Tolkien |
     *     +---------------+-----------------------+------------------+
     */
    public function render()
    {
        $divider = new TableSeparator();
        if ($this-&gt;horizontal) {
            $rows = [];
            foreach ($this-&gt;headers[0] ?? [] as $i =&gt; $header) {
                $rows[$i] = [$header];
                foreach ($this-&gt;rows as $row) {
                    if ($row instanceof TableSeparator) {
                        continue;
                    }
                    if (isset($row[$i])) {
                        $rows[$i][] = $row[$i];
                    } elseif ($rows[$i][0] instanceof TableCell &amp;&amp; $rows[$i][0]-&gt;getColspan() &gt;= 2) {
                        // Noop, there is a &quot;title&quot;
                    } else {
                        $rows[$i][] = null;
                    }
                }
            }
        } else {
            $rows = array_merge($this-&gt;headers, [$divider], $this-&gt;rows);
        }

        $this-&gt;calculateNumberOfColumns($rows);

        $rowGroups = $this-&gt;buildTableRows($rows);
        $this-&gt;calculateColumnsWidth($rowGroups);

        $isHeader = !$this-&gt;horizontal;
        $isFirstRow = $this-&gt;horizontal;
        $hasTitle = (bool) $this-&gt;headerTitle;

        foreach ($rowGroups as $rowGroup) {
            $isHeaderSeparatorRendered = false;

            foreach ($rowGroup as $row) {
                if ($divider === $row) {
                    $isHeader = false;
                    $isFirstRow = true;

                    continue;
                }

                if ($row instanceof TableSeparator) {
                    $this-&gt;renderRowSeparator();

                    continue;
                }

                if (!$row) {
                    continue;
                }

                if ($isHeader &amp;&amp; !$isHeaderSeparatorRendered) {
                    $this-&gt;renderRowSeparator(
                        $isHeader ? self::SEPARATOR_TOP : self::SEPARATOR_TOP_BOTTOM,
                        $hasTitle ? $this-&gt;headerTitle : null,
                        $hasTitle ? $this-&gt;style-&gt;getHeaderTitleFormat() : null
                    );
                    $hasTitle = false;
                    $isHeaderSeparatorRendered = true;
                }

                if ($isFirstRow) {
                    $this-&gt;renderRowSeparator(
                        $isHeader ? self::SEPARATOR_TOP : self::SEPARATOR_TOP_BOTTOM,
                        $hasTitle ? $this-&gt;headerTitle : null,
                        $hasTitle ? $this-&gt;style-&gt;getHeaderTitleFormat() : null
                    );
                    $isFirstRow = false;
                    $hasTitle = false;
                }

                if ($this-&gt;horizontal) {
                    $this-&gt;renderRow($row, $this-&gt;style-&gt;getCellRowFormat(), $this-&gt;style-&gt;getCellHeaderFormat());
                } else {
                    $this-&gt;renderRow($row, $isHeader ? $this-&gt;style-&gt;getCellHeaderFormat() : $this-&gt;style-&gt;getCellRowFormat());
                }
            }
        }
        $this-&gt;renderRowSeparator(self::SEPARATOR_BOTTOM, $this-&gt;footerTitle, $this-&gt;style-&gt;getFooterTitleFormat());

        $this-&gt;cleanup();
        $this-&gt;rendered = true;
    }

    /**
     * Renders horizontal header separator.
     *
     * Example:
     *
     *     +-----+-----------+-------+
     */
    private function renderRowSeparator(int $type = self::SEPARATOR_MID, ?string $title = null, ?string $titleFormat = null)
    {
        if (0 === $count = $this-&gt;numberOfColumns) {
            return;
        }

        $borders = $this-&gt;style-&gt;getBorderChars();
        if (!$borders[0] &amp;&amp; !$borders[2] &amp;&amp; !$this-&gt;style-&gt;getCrossingChar()) {
            return;
        }

        $crossings = $this-&gt;style-&gt;getCrossingChars();
        if (self::SEPARATOR_MID === $type) {
            [$horizontal, $leftChar, $midChar, $rightChar] = [$borders[2], $crossings[8], $crossings[0], $crossings[4]];
        } elseif (self::SEPARATOR_TOP === $type) {
            [$horizontal, $leftChar, $midChar, $rightChar] = [$borders[0], $crossings[1], $crossings[2], $crossings[3]];
        } elseif (self::SEPARATOR_TOP_BOTTOM === $type) {
            [$horizontal, $leftChar, $midChar, $rightChar] = [$borders[0], $crossings[9], $crossings[10], $crossings[11]];
        } else {
            [$horizontal, $leftChar, $midChar, $rightChar] = [$borders[0], $crossings[7], $crossings[6], $crossings[5]];
        }

        $markup = $leftChar;
        for ($column = 0; $column &lt; $count; ++$column) {
            $markup .= str_repeat($horizontal, $this-&gt;effectiveColumnWidths[$column]);
            $markup .= $column === $count - 1 ? $rightChar : $midChar;
        }

        if (null !== $title) {
            $titleLength = Helper::width(Helper::removeDecoration($formatter = $this-&gt;output-&gt;getFormatter(), $formattedTitle = sprintf($titleFormat, $title)));
            $markupLength = Helper::width($markup);
            if ($titleLength &gt; $limit = $markupLength - 4) {
                $titleLength = $limit;
                $formatLength = Helper::width(Helper::removeDecoration($formatter, sprintf($titleFormat, '')));
                $formattedTitle = sprintf($titleFormat, Helper::substr($title, 0, $limit - $formatLength - 3).'...');
            }

            $titleStart = intdiv($markupLength - $titleLength, 2);
            if (false === mb_detect_encoding($markup, null, true)) {
                $markup = substr_replace($markup, $formattedTitle, $titleStart, $titleLength);
            } else {
                $markup = mb_substr($markup, 0, $titleStart).$formattedTitle.mb_substr($markup, $titleStart + $titleLength);
            }
        }

        $this-&gt;output-&gt;writeln(sprintf($this-&gt;style-&gt;getBorderFormat(), $markup));
    }

    /**
     * Renders vertical column separator.
     */
    private function renderColumnSeparator(int $type = self::BORDER_OUTSIDE): string
    {
        $borders = $this-&gt;style-&gt;getBorderChars();

        return sprintf($this-&gt;style-&gt;getBorderFormat(), self::BORDER_OUTSIDE === $type ? $borders[1] : $borders[3]);
    }

    /**
     * Renders table row.
     *
     * Example:
     *
     *     | 9971-5-0210-0 | A Tale of Two Cities  | Charles Dickens  |
     */
    private function renderRow(array $row, string $cellFormat, ?string $firstCellFormat = null)
    {
        $rowContent = $this-&gt;renderColumnSeparator(self::BORDER_OUTSIDE);
        $columns = $this-&gt;getRowColumns($row);
        $last = \count($columns) - 1;
        foreach ($columns as $i =&gt; $column) {
            if ($firstCellFormat &amp;&amp; 0 === $i) {
                $rowContent .= $this-&gt;renderCell($row, $column, $firstCellFormat);
            } else {
                $rowContent .= $this-&gt;renderCell($row, $column, $cellFormat);
            }
            $rowContent .= $this-&gt;renderColumnSeparator($last === $i ? self::BORDER_OUTSIDE : self::BORDER_INSIDE);
        }
        $this-&gt;output-&gt;writeln($rowContent);
    }

    /**
     * Renders table cell with padding.
     */
    private function renderCell(array $row, int $column, string $cellFormat): string
    {
        $cell = $row[$column] ?? '';
        $width = $this-&gt;effectiveColumnWidths[$column];
        if ($cell instanceof TableCell &amp;&amp; $cell-&gt;getColspan() &gt; 1) {
            // add the width of the following columns(numbers of colspan).
            foreach (range($column + 1, $column + $cell-&gt;getColspan() - 1) as $nextColumn) {
                $width += $this-&gt;getColumnSeparatorWidth() + $this-&gt;effectiveColumnWidths[$nextColumn];
            }
        }

        // str_pad won't work properly with multi-byte strings, we need to fix the padding
        if (false !== $encoding = mb_detect_encoding($cell, null, true)) {
            $width += \strlen($cell) - mb_strwidth($cell, $encoding);
        }

        $style = $this-&gt;getColumnStyle($column);

        if ($cell instanceof TableSeparator) {
            return sprintf($style-&gt;getBorderFormat(), str_repeat($style-&gt;getBorderChars()[2], $width));
        }

        $width += Helper::length($cell) - Helper::length(Helper::removeDecoration($this-&gt;output-&gt;getFormatter(), $cell));
        $content = sprintf($style-&gt;getCellRowContentFormat(), $cell);

        $padType = $style-&gt;getPadType();
        if ($cell instanceof TableCell &amp;&amp; $cell-&gt;getStyle() instanceof TableCellStyle) {
            $isNotStyledByTag = !preg_match('/^&lt;(\w+|(\w+=[\w,]+;?)*)&gt;.+&lt;\/(\w+|(\w+=\w+;?)*)?&gt;$/', $cell);
            if ($isNotStyledByTag) {
                $cellFormat = $cell-&gt;getStyle()-&gt;getCellFormat();
                if (!\is_string($cellFormat)) {
                    $tag = http_build_query($cell-&gt;getStyle()-&gt;getTagOptions(), '', ';');
                    $cellFormat = '&lt;'.$tag.'&gt;%s&lt;/&gt;';
                }

                if (strstr($content, '&lt;/&gt;')) {
                    $content = str_replace('&lt;/&gt;', '', $content);
                    $width -= 3;
                }
                if (strstr($content, '&lt;fg=default;bg=default&gt;')) {
                    $content = str_replace('&lt;fg=default;bg=default&gt;', '', $content);
                    $width -= \strlen('&lt;fg=default;bg=default&gt;');
                }
            }

            $padType = $cell-&gt;getStyle()-&gt;getPadByAlign();
        }

        return sprintf($cellFormat, str_pad($content, $width, $style-&gt;getPaddingChar(), $padType));
    }

    /**
     * Calculate number of columns for this table.
     */
    private function calculateNumberOfColumns(array $rows)
    {
        $columns = [0];
        foreach ($rows as $row) {
            if ($row instanceof TableSeparator) {
                continue;
            }

            $columns[] = $this-&gt;getNumberOfColumns($row);
        }

        $this-&gt;numberOfColumns = max($columns);
    }

    private function buildTableRows(array $rows): TableRows
    {
        /** @var WrappableOutputFormatterInterface $formatter */
        $formatter = $this-&gt;output-&gt;getFormatter();
        $unmergedRows = [];
        for ($rowKey = 0; $rowKey &lt; \count($rows); ++$rowKey) {
            $rows = $this-&gt;fillNextRows($rows, $rowKey);

            // Remove any new line breaks and replace it with a new line
            foreach ($rows[$rowKey] as $column =&gt; $cell) {
                $colspan = $cell instanceof TableCell ? $cell-&gt;getColspan() : 1;

                if (isset($this-&gt;columnMaxWidths[$column]) &amp;&amp; Helper::width(Helper::removeDecoration($formatter, $cell)) &gt; $this-&gt;columnMaxWidths[$column]) {
                    $cell = $formatter-&gt;formatAndWrap($cell, $this-&gt;columnMaxWidths[$column] * $colspan);
                }
                if (!strstr($cell ?? '', &quot;\n&quot;)) {
                    continue;
                }
                $eol = str_contains($cell ?? '', &quot;\r\n&quot;) ? &quot;\r\n&quot; : &quot;\n&quot;;
                $escaped = implode($eol, array_map([OutputFormatter::class, 'escapeTrailingBackslash'], explode($eol, $cell)));
                $cell = $cell instanceof TableCell ? new TableCell($escaped, ['colspan' =&gt; $cell-&gt;getColspan()]) : $escaped;
                $lines = explode($eol, str_replace($eol, '&lt;fg=default;bg=default&gt;&lt;/&gt;'.$eol, $cell));
                foreach ($lines as $lineKey =&gt; $line) {
                    if ($colspan &gt; 1) {
                        $line = new TableCell($line, ['colspan' =&gt; $colspan]);
                    }
                    if (0 === $lineKey) {
                        $rows[$rowKey][$column] = $line;
                    } else {
                        if (!\array_key_exists($rowKey, $unmergedRows) || !\array_key_exists($lineKey, $unmergedRows[$rowKey])) {
                            $unmergedRows[$rowKey][$lineKey] = $this-&gt;copyRow($rows, $rowKey);
                        }
                        $unmergedRows[$rowKey][$lineKey][$column] = $line;
                    }
                }
            }
        }

        return new TableRows(function () use ($rows, $unmergedRows): \Traversable {
            foreach ($rows as $rowKey =&gt; $row) {
                $rowGroup = [$row instanceof TableSeparator ? $row : $this-&gt;fillCells($row)];

                if (isset($unmergedRows[$rowKey])) {
                    foreach ($unmergedRows[$rowKey] as $row) {
                        $rowGroup[] = $row instanceof TableSeparator ? $row : $this-&gt;fillCells($row);
                    }
                }
                yield $rowGroup;
            }
        });
    }

    private function calculateRowCount(): int
    {
        $numberOfRows = \count(iterator_to_array($this-&gt;buildTableRows(array_merge($this-&gt;headers, [new TableSeparator()], $this-&gt;rows))));

        if ($this-&gt;headers) {
            ++$numberOfRows; // Add row for header separator
        }

        if (\count($this-&gt;rows) &gt; 0) {
            ++$numberOfRows; // Add row for footer separator
        }

        return $numberOfRows;
    }

    /**
     * fill rows that contains rowspan &gt; 1.
     *
     * @throws InvalidArgumentException
     */
    private function fillNextRows(array $rows, int $line): array
    {
        $unmergedRows = [];
        foreach ($rows[$line] as $column =&gt; $cell) {
            if (null !== $cell &amp;&amp; !$cell instanceof TableCell &amp;&amp; !\is_scalar($cell) &amp;&amp; !(\is_object($cell) &amp;&amp; method_exists($cell, '__toString'))) {
                throw new InvalidArgumentException(sprintf('A cell must be a TableCell, a scalar or an object implementing &quot;__toString()&quot;, &quot;%s&quot; given.', get_debug_type($cell)));
            }
            if ($cell instanceof TableCell &amp;&amp; $cell-&gt;getRowspan() &gt; 1) {
                $nbLines = $cell-&gt;getRowspan() - 1;
                $lines = [$cell];
                if (strstr($cell, &quot;\n&quot;)) {
                    $eol = str_contains($cell, &quot;\r\n&quot;) ? &quot;\r\n&quot; : &quot;\n&quot;;
                    $lines = explode($eol, str_replace($eol, '&lt;fg=default;bg=default&gt;'.$eol.'&lt;/&gt;', $cell));
                    $nbLines = \count($lines) &gt; $nbLines ? substr_count($cell, $eol) : $nbLines;

                    $rows[$line][$column] = new TableCell($lines[0], ['colspan' =&gt; $cell-&gt;getColspan(), 'style' =&gt; $cell-&gt;getStyle()]);
                    unset($lines[0]);
                }

                // create a two dimensional array (rowspan x colspan)
                $unmergedRows = array_replace_recursive(array_fill($line + 1, $nbLines, []), $unmergedRows);
                foreach ($unmergedRows as $unmergedRowKey =&gt; $unmergedRow) {
                    $value = $lines[$unmergedRowKey - $line] ?? '';
                    $unmergedRows[$unmergedRowKey][$column] = new TableCell($value, ['colspan' =&gt; $cell-&gt;getColspan(), 'style' =&gt; $cell-&gt;getStyle()]);
                    if ($nbLines === $unmergedRowKey - $line) {
                        break;
                    }
                }
            }
        }

        foreach ($unmergedRows as $unmergedRowKey =&gt; $unmergedRow) {
            // we need to know if $unmergedRow will be merged or inserted into $rows
            if (isset($rows[$unmergedRowKey]) &amp;&amp; \is_array($rows[$unmergedRowKey]) &amp;&amp; ($this-&gt;getNumberOfColumns($rows[$unmergedRowKey]) + $this-&gt;getNumberOfColumns($unmergedRows[$unmergedRowKey]) &lt;= $this-&gt;numberOfColumns)) {
                foreach ($unmergedRow as $cellKey =&gt; $cell) {
                    // insert cell into row at cellKey position
                    array_splice($rows[$unmergedRowKey], $cellKey, 0, [$cell]);
                }
            } else {
                $row = $this-&gt;copyRow($rows, $unmergedRowKey - 1);
                foreach ($unmergedRow as $column =&gt; $cell) {
                    if (!empty($cell)) {
                        $row[$column] = $unmergedRow[$column];
                    }
                }
                array_splice($rows, $unmergedRowKey, 0, [$row]);
            }
        }

        return $rows;
    }

    /**
     * fill cells for a row that contains colspan &gt; 1.
     */
    private function fillCells(iterable $row)
    {
        $newRow = [];

        foreach ($row as $column =&gt; $cell) {
            $newRow[] = $cell;
            if ($cell instanceof TableCell &amp;&amp; $cell-&gt;getColspan() &gt; 1) {
                foreach (range($column + 1, $column + $cell-&gt;getColspan() - 1) as $position) {
                    // insert empty value at column position
                    $newRow[] = '';
                }
            }
        }

        return $newRow ?: $row;
    }

    private function copyRow(array $rows, int $line): array
    {
        $row = $rows[$line];
        foreach ($row as $cellKey =&gt; $cellValue) {
            $row[$cellKey] = '';
            if ($cellValue instanceof TableCell) {
                $row[$cellKey] = new TableCell('', ['colspan' =&gt; $cellValue-&gt;getColspan()]);
            }
        }

        return $row;
    }

    /**
     * Gets number of columns by row.
     */
    private function getNumberOfColumns(array $row): int
    {
        $columns = \count($row);
        foreach ($row as $column) {
            $columns += $column instanceof TableCell ? ($column-&gt;getColspan() - 1) : 0;
        }

        return $columns;
    }

    /**
     * Gets list of columns for the given row.
     */
    private function getRowColumns(array $row): array
    {
        $columns = range(0, $this-&gt;numberOfColumns - 1);
        foreach ($row as $cellKey =&gt; $cell) {
            if ($cell instanceof TableCell &amp;&amp; $cell-&gt;getColspan() &gt; 1) {
                // exclude grouped columns.
                $columns = array_diff($columns, range($cellKey + 1, $cellKey + $cell-&gt;getColspan() - 1));
            }
        }

        return $columns;
    }

    /**
     * Calculates columns widths.
     */
    private function calculateColumnsWidth(iterable $groups)
    {
        for ($column = 0; $column &lt; $this-&gt;numberOfColumns; ++$column) {
            $lengths = [];
            foreach ($groups as $group) {
                foreach ($group as $row) {
                    if ($row instanceof TableSeparator) {
                        continue;
                    }

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

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

            $this-&gt;effectiveColumnWidths[$column] = max($lengths) + Helper::width($this-&gt;style-&gt;getCellRowContentFormat()) - 2;
        }
    }

    private function getColumnSeparatorWidth(): int
    {
        return Helper::width(sprintf($this-&gt;style-&gt;getBorderFormat(), $this-&gt;style-&gt;getBorderChars()[3]));
    }

    private function getCellWidth(array $row, int $column): int
    {
        $cellWidth = 0;

        if (isset($row[$column])) {
            $cell = $row[$column];
            $cellWidth = Helper::width(Helper::removeDecoration($this-&gt;output-&gt;getFormatter(), $cell));
        }

        $columnWidth = $this-&gt;columnWidths[$column] ?? 0;
        $cellWidth = max($cellWidth, $columnWidth);

        return isset($this-&gt;columnMaxWidths[$column]) ? min($this-&gt;columnMaxWidths[$column], $cellWidth) : $cellWidth;
    }

    /**
     * Called after rendering to cleanup cache data.
     */
    private function cleanup()
    {
        $this-&gt;effectiveColumnWidths = [];
        $this-&gt;numberOfColumns = null;
    }

    /**
     * @return array&lt;string, TableStyle&gt;
     */
    private static function initStyles(): array
    {
        $borderless = new TableStyle();
        $borderless
            -&gt;setHorizontalBorderChars('=')
            -&gt;setVerticalBorderChars(' ')
            -&gt;setDefaultCrossingChar(' ')
        ;

        $compact = new TableStyle();
        $compact
            -&gt;setHorizontalBorderChars('')
            -&gt;setVerticalBorderChars('')
            -&gt;setDefaultCrossingChar('')
            -&gt;setCellRowContentFormat('%s ')
        ;

        $styleGuide = new TableStyle();
        $styleGuide
            -&gt;setHorizontalBorderChars('-')
            -&gt;setVerticalBorderChars(' ')
            -&gt;setDefaultCrossingChar(' ')
            -&gt;setCellHeaderFormat('%s')
        ;

        $box = (new TableStyle())
            -&gt;setHorizontalBorderChars('─')
            -&gt;setVerticalBorderChars('│')
            -&gt;setCrossingChars('┼', '┌', '┬', '┐', '┤', '┘', '┴', '└', '├')
        ;

        $boxDouble = (new TableStyle())
            -&gt;setHorizontalBorderChars('═', '─')
            -&gt;setVerticalBorderChars('║', '│')
            -&gt;setCrossingChars('┼', '╔', '╤', '╗', '╢', '╝', '╧', '╚', '╟', '╠', '╪', '╣')
        ;

        return [
            'default' =&gt; new TableStyle(),
            'borderless' =&gt; $borderless,
            'compact' =&gt; $compact,
            'symfony-style-guide' =&gt; $styleGuide,
            'box' =&gt; $box,
            'box-double' =&gt; $boxDouble,
        ];
    }

    private function resolveStyle($name): TableStyle
    {
        if ($name instanceof TableStyle) {
            return $name;
        }

        if (isset(self::$styles[$name])) {
            return self::$styles[$name];
        }

        throw new InvalidArgumentException(sprintf('Style &quot;%s&quot; is not defined.', $name));
    }
}
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