Autoformat should not react to non-transparent batch

[scofalik]

I know, I know.

We just removed this condition, because we thought it is no longer needed. Unfortunately, that was a mistake and we still need to react only to transparent batches. Why?

On model.Document#event:change we check if proper characters have been put together, for example, we check if 1. was typed. If so, we open a new enqueueChange block, and inside it, we insert a list item.

However, the list item is inserted in another batch. What's more, the batch with 1. is sent before and separately to the batch with the list item.

So, in collaboration, a remote client first receives a batch that inserts 1. , the batch is handled (list item is inserted by auto format) and then it receives another batch, which also inserts list item. This causes a bug.

As I also mentioned, it will be enough to react only to transparent batches. Another solution would be to introduce another event (let's call it changesDone ha-ha-ha). That event would be fired after all change blocks are done. I will create a ticket to discuss it.

[scofalik]

https://github.com/ckeditor/ckeditor5-engine/issues/1362