wpautop breaks <fieldset> and <legend> markup

[MarkBlankestijn]

I use the fieldset (and legend) tag in my posts. These tags aren't parsed correctly by Wordpress and produces invalid XHTML. I'm not sure if it's correct, but this is how I fixed it:

formatting.php

Line 120; add fieldset and legend:

$allblocks = '(?:table|thead|tfoot|caption|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|form|map|area|blockquote|fieldset|legend|address|math|style|input|p|h[1-6]|hr)';

Add the following line, e.g. below line 139:

$pee = str_replace('</fieldset>', '</p></fieldset>', $pee);

[Sam_a]

Adds FIELDSET and LEGEND to wpautop's list of HTML block elements

[Sam_a]

Patch stops wpautop from wrapping fieldset and legend in paragraph tags.

But I still see invalid markup when text inside the fieldset has less than 2 newlines above and below it; wpautop inserts <p> but omits </p>:

<?php echo wpautop("<fieldset><legend>Legend</legend>Text inside fieldset</fieldset>"); ?>

<fieldset>
<legend>Legend</legend>
<p>Text inside fieldset</fieldset>

[Denis-de-Bernardy]

patch is broken, but easy enough to fix. js patch is needed also

[Denis-de-Bernardy]

punting pending patch

[Sam_a]

Stops autop from breaking fieldset & legend markup

[Sam_a]

Attached patch autop_fieldset_legend.diff seems to fix the problem in trunk.

[Denis-de-Bernardy]

patch is stale...

[azaozz]

The problem is larger that this. It may affect any block element that can contain other block elements like <div>, <td>, <th>, <fieldset>, <dd>, etc. Been working on a patch to fix all or nearly all of these cases but it still needs a lot of testing.

[azaozz]

(In [12275]) Autop: add fieldset to blocks, remove support for empty <p> for now, fix block in block problems when switching the editor from visual to html and back, fixes #8644