Text filter to only show first content page if current route is not that entity route

WIP, I'm stuck because of #3360216.

This works, though it takes a bit of finagling to make it work correctly due to #3360216.

In order to make #3 work I had to manually modify the config file for the text format like this:

  filter_html:
    id: filter_html
    provider: filter
    status: true
    weight: -48
    settings:
      allowed_html: '<br> <p class="text-align-left text-align-center text-align-right text-align-justify"> <h2 class="text-align-left text-align-center text-align-right text-align-justify"> <h3 class="text-align-left text-align-center text-align-right text-align-justify"> <h4 class="text-align-left text-align-center text-align-right text-align-justify"> <h5 class="text-align-left text-align-center text-align-right text-align-justify"> <h6 class="text-align-left text-align-center text-align-right text-align-justify"> <strong> <em> <s> <sub> <sup> <blockquote> <a href data-entity-type data-entity-uuid data-entity-substitution> <ul> <ol reversed start> <li> <hr> <drupal-media data-entity-type data-entity-uuid alt data-caption data-align> <div class="page-break" style="page-break-after"> <span style="display">'
      filter_html_help: false
      filter_html_nofollow: false

The new bits are the DIV and SPAN items at the end.

It's worth noting that the plugin in #3 looks for <div class="page-break" rather than the full string provided by the Pagebreak plugin.

Now with the config file I forgot to add before. I also renamed the plugin to be more specific.

Moving to the CKEditor 5 Plugin Pack module.

The patch needs to be rerolled.

Rerolled.

Hello @damienmckenna
In Drupal 10.3 I can't submit a Text Format form. I have an error:

Error message
'node' is not a supported key.
'file' is not a supported key.
'media' is not a supported key.
'taxonomy_term' is not a supported key.
'user' is not a supported key.

Possible it is a similar case as in the shortcode module: https://www.drupal.org/project/shortcode/issues/3457731 🐛 Unable to save text format config form in 10.3 Fixed

Please open a new issue for the problem you're running into, it's a different problem to what this issue is focused on. Thank you.

@damienmckenna
I had that error when I applied your patch, so it is related to this issue.
On Drupal 10.2 I can save text format but on 10.3 it doesn't work.

I worked out a fix for this - the config schema needed to use a "sequence", not a "mapping".

We've decided not to include this change in the module as it seems to be quite use-case specific.
We'll be happy to reconsider in the future in case there would be more people requesting this feature.