Text editors

Hello,

Here are the news from my plugin development : I was able to produce a copy of the assignment online text feedback with a customized version of the Atto editor.

I found the solution here :
https://moodle.org/mod/forum/discuss.php?d=380163
I also added a simple command line to put the assignment text as default text in the comment field in get_form_elements_for_user function in locallib.php line 318.

$editor_toolbar = <<<EOT
collapse = collapse
style1 = writeup,html
EOT;

            $usertext = $this->convert_submission_text_to_feedback($submission, $data);                                                                  

        $mform->addElement('editor', 'assignfeedbackwriteup_editor', $this->get_name(), null, array('atto:toolbar' => $editor_toolbar, 'autosave' => true))->setValue( array('text' => "$usertext") );

And I will finally derive this Atto plugin that does a big part of the job :
https://moodle.org/plugins/atto_corrections

I had some modifications on this plugin that seems to use YUI but I do not find how to proceed to generate the build files based on changes in src. Do I have to use Grunt as suggested here ?
https://docs.moodle.org/dev/Grunt

Great thanks for help.

Zabelle