Symfony version(s) affected

6.2

Description

Using box-styles for tables is awesome !

However, if combined with span, rendering is not very pleasant anymore :

• border that are over or under a col-spanned cell draw vertical lines, as if they weren't. See above und under cell "H".
• right border after a col-spanned cell sometimes use the bad border char
  ** sometimes it's simple instead of double, see right of cells 1.4 / 4.4
  ** sometimes it's double instead of simple, see right of cell 4.3

I will try the same with the latest Symfony version, (but I doubt it has been done).

BTW, I know this will complicate a lot the style rendering. It requires refactoring to make methods like "getCrossingChars" depend upon the previous and next row we're rendring.
I will try it as an exercise when I'll have some available time.

It will also raise questions, like how to deal with vertical continuity when a col-spanned cell is in the middle of the table, like cell 3.3-4 ? I'll imagine every possible case, and propose an answer for each.

How to reproduce

$table = new Table($output);
$table->setStyle('box-double');
$table->setHeaders(
    [
        new TableCell(
            'H. A totally full spanned long header ',
            ['colspan' => 4, 'style' => new TableCellStyle(['align' => 'center'])]
        )
    ]
);
$table->addRow([
    new TableCell('1-3.1. spanned on 3 rows', ['rowspan' => 3]),
    new TableCell('1.2-3. a spanned cell across two cols', ['colspan' => 2]),
    '1.4 content'
]);
$table->addRow([
    '2.2 content',
    '2.3. content',
    '2.4 content',
]);
$table->addRow([
    '3.2 content',
    new TableCell('3.3-4 content', ['colspan' => 2]),
]);
$table->addRow([
    new TableCell('4.1-2. a spanned cell across two cols', ['colspan' => 2]),
    '4.3. content',
    '4.4. content',
]);

$table->setFooterTitle('footer');
$table->render();

Possible Solution

None so far. I just opened the TableStyle class, I'll have to understand how it handles the borders.

Additional Context

No response