Add Source Button to h5pEditor

Can anyone point a way to do this? By following the instructions at I have built a module with an after_build hook and manage to add tags and buttons to the h5peditor tool bar, but I cannot seem the add the Source (i.e. sourcearea) button plugin? I ahve downloaded the plugin and the js to load it is being run but the H5PEditor.HtmlAddons.text.sourcearea function id never breing called? Any ideas?

Thank you

falcon's picture

Don't think anyone in the H5P Core Team has any experience with that CKEditor plugin. Hopefully someone else in the community will be able to help...