Cursoring broken when widgets inside an empty par

[RichieAHB]

Issue details

As above.

Steps to reproduce

https://quick-phone.glitch.me/

The widgets are absolutely positioned to show where they are but the bug is the same when they are not absolutely positioned.

Cursor at the end of the heading, press Enter, cursor position does not change. Continue to cursor up and down through the empty spaces into the heading and lower par and you'll see oddly positioned cursors. This is worse in Firefox.

ProseMirror version

Latest in Glitch

Affected platforms

• Chrome
• Firefox - untested
• Internet Explorer
• Other

[marijnh]

There's a bunch of really horrible Chrome brokenness coming up with this—the selection reported by getSelection doesn't match the visible cursor (once again), and cursor motion is doing things that really don't make any sense. I'm not sure where to even start with working around these.

In Firefox, the situation is also not great, but the only issue seems to be that the cursor is invisible, it is at least behaving reasonable.