Marker of unordered list item is vertically centerd when list item has multiple lines of text

[lukaslebo]

When using the ITextRendered to generate a pdf from a html containing a unodered list with list items that consist of text with multiple lines the list item marker is centered instead of aligned with the first line.

This changed in version 9.7.2 because of the issue #302:

• since version 9.7.2 markers are vertically centered
• up to version 9.7.1 markes are vertically aligned with the first line of the list item

Expected would be an alignment similar to browsers, where the marker uses baseline alignment with the first line of text.

Example html snippet

<p><strong>Bullets</strong></p>
<ul>
  <li><p>TODO 1</p>
    <ul>
      <li><p>Sub TODO 1a<br>with a second<br>and third line</p></li>
      <li><p>Sub <strong><span style="color:#d93f0b;">TODO</span></strong><span style="color:#d93f0b;"> </span>1b</p>
        <ul>
          <li><p>1ba</p></li>
        </ul>
      </li>
      <li><p>Sub TODO 1c</p></li>
    </ul>
  </li>
  <li><p>TODO 2</p></li>
  <li><p>final point</p></li>
</ul>

with 9.7.1 results in:

with 9.7.2 results in:

[asolntsev]

@lukaslebo Thank you for reporting the problem.
Do you have an idea how to fix it?

[lukaslebo]

Hi @asolntsev

Unfortunately, I haven't had the chance to dive deep into the code to figure it out and don't have a concrete solution at the moment.

I suspect that correctly computing the alignment might require looking into how browsers handle list markers.

Do you have any suggestions?

[asolntsev]

No, I don't have any ideas at the moment.
But I am ready to merge a pull request and release a new version as soon as it comes.