## Experimental Writer comments editing collaboration with yrs

### How to build

First, build yrs C FFI bindings:

```
 git clone https://github.com/y-crdt/y-crdt.git
 cd y-crdt
 git checkout v0.23.1
 cargo build -p yffi
```

Then, put the yrs build directory in autogen.input:

`--with-yrs=/path/to/y-crdt`

### How to run

To prevent crashes at runtime, set the environment variable
EDIT_COMMENT_IN_READONLY_MODE=1 and open documents in read-only mode: only
inserting/deleting comments, and editing inside comments will be enabled.

Currently, communication happens over a hard-coded pipe:

* start an soffice with YRSACCEPT=1 load a Writer document and it will listen
  and block until connect
  (you can also create a new Writer document but that will be boring if all
  you can do is insert comments into empty doc)

* start another soffice with a different user profile, create new Writer
  document, and it will connect and load the document from the other side

All sorts of paragraph and character formattings should work inside comments.

Inserting hyperlinks also works, although sadly i wasn't able to figure out
how to enable the menu items in read-only mode, so it only works in editable
mode.

Undo/Redo doesn't work at all, it's disabled in readonly mode anyway.

Switching to editable mode is also possible, but only comment-related editing
is synced via yrs, so if other editing operations change the positions of
comments, a crash will be inevitable.