Upgrade CKEditor to v5

[skenow]

CKEditer 4 has been deprecated and is no longer supported. CKEditor 5 is the new version and has undergone a major overhaul. Time to get this working in ImpressCMS.

[skenow]

I have a somewhat working implementation of this, however it relies on a single attribute to determine which element to attach the editor to. Our current core uses the name of the element, which changes, depending on the module, or even the field. For example, News has a description and an extended text field that both get a rich text editor.

[skenow]

I've tried to employ the method described here for having multiple editors on a page and not having success. What I got was an error that function ClassicEditor was not defined or available.

[fiammybe]

I was working on this a few months ago and had a working prototype : https://github.com/fiammybe/ImpressCMS-CKEditor5

[skenow]

I must be missing something. When I add that to my test site, I just get the DHTML editor and I don't see any ckeditor includes. I does show up in the list of available editors and I updated the system module to be sure I wasn't seeing my attempt.

[fiammybe]

the adapter file formCkeditor5.php was missing in the commit (but was on my site), I just added it to the repository

[skenow]

We're getting close - my OS is case-sensitive and I had to make some adjustments to the file name and folder name for the editor. Also, xoops_version.php is still a requirement until we resolve #1649 (good first ticket).

There are some plugins that aren't loading for the full toolbar, and there isn't an icon to add an image.