MultiRootEditor#editable contains a random editable and may be harmful

[scofalik]

📝 Provide a description of the improvement

Follow-up after #13532.

After introducing MultiRootEditor editor type and making the editor-related classes compatible with parent classes, it appeared that there is a mismatch with editable property. This property is expected on EditorUIView however it does not make sense for MultiRootEditorUIView as this type of editor has many editables.

In general, the property is not used a lot but it is used in some places.

My initial proposal for this problem is to remove editable property from EditorUIView. All places where it is used, should try using something else and EditorUIView or other class should provide necessary API. For example, editable is used by balloon toolbar. Maybe instead we can provide .getFocusedEditable() that could be used instead?

A different route would be to make MultiRootEditorUIView not extend EditorUIView but this is not a simple change either and it means that some parts of our code will not support multi-root. I'd rather go the opposite direction - generalize the solutions and try to make the code handle multiple editables.

[CKEditorBot]

There has been no activity on this issue for the past year. We've marked it as stale and will close it in 30 days. We understand it may still be relevant, so if you're interested in the solution, leave a comment or reaction under this issue.

[CKEditorBot]

We've closed your issue due to inactivity. We understand that the issue may still be relevant. If so, feel free to open a new one (and link this issue to it).