Nested tables: HTML writer bug?

[William Lupton <wlupton-QSt+ys/nuMyEUIsrzH9SikB+6BGkLq7r@public.gmane.org>]

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All,

[Forked from
https://groups.google.com/g/pandoc-discuss/c/5O6iYmUwFJ8/m/biiwj2njAAAJ]

In the above thread I presented the grid.md example shown at the bottom of
this message. I also couldn't resist trying another level of nesting,
resulting in the grid2.md example shown below. This works, but I'm
wondering whether there's a bug (in the HTML writer) relating to how nested
grid table widths are calculated:

   - pandoc -s grid2.md -o grid2.html gives the first image shown below
   the markdown, in which the nested grid table has a scroll bar
   - The table and column widths are as shown immediately below and I'm
   wondering where the width:44% came from. Removing it gives the second
   image below the markdown (no scroll bar)

I'm not seriously suggesting actually using a text editor to create deeply
nested tables such as these... but given that it works I wanted to
understand what was going on with the table width calculation.

Thanks,
William

% xmllint -format grid2.html | egrep -e '<(\/?table|col )'
    <table style="width:79%;">
        <col style="width: 18%"/>
        <col style="width: 11%"/>
        <col style="width: 50%"/>
            <table style="width:44%;">
                <col style="width: 18%"/>
                <col style="width: 26%"/>
                    <table>
                    </table>
            </table>
    </table>

*grid2.md*

+------------+-------+-----------------------------------+
| Fruit      | Price | Advantages                        |
+============+=======+===================================+
| Bananas    | $1.34 | - built-in wrapper                |
|            |       | - bright color                    |
+------------+-------+-----------------------------------+
| Oranges    | $2.10 | - cures scurvy                    |
|            |       | - tasty                           |
+------------+-------+-----------------------------------+
| Apple (pi) | $3.14 | +------------+------------------+ |
|            |       | | One        | Two              | |
|            |       | +============+==================+ |
|            |       | | my         | table            | |
|            |       | +------------+------------------+ |
|            |       | | is         | | Three | Four | | |
|            |       | |            | |-------+------| | |
|            |       | |            | | very  | nice | | |
|            |       | +------------+------------------+ |
+------------+-------+-----------------------------------+

[image: Screenshot 2022-07-22 at 11.46.56.png]

[image: Screenshot 2022-07-22 at 11.57.56.png]

*grid.md*

+---------------+---------------+--------------------+
| Fruit         | Price         | Advantages         |
+===============+===============+====================+
| Bananas       | $1.34         | - built-in wrapper |
|               |               | - bright color     |
+---------------+---------------+--------------------+
| Oranges       | $2.10         | - cures scurvy     |
|               |               | - tasty            |
+---------------+---------------+--------------------+
| Apple (pi)    | $3.14         | | One | Two   |    |
|               |               | |-----+-------|    |
|               |               | | my  | table |    |
|               |               | | is  | nice  |    |
+---------------+---------------+--------------------+

[image: Screenshot 2022-07-20 at 23.36.36.png]

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