Does it generally make sense to hide ghost text if the editor does not have focus anymore?
Or should this just be done for notebook cells?

Not sure - does copilot still have a mode where they open extra suggestions in a side editor? I thought that switching normal editors while using copilot might be a real use case. For the purposes of this issue, either way is fine.

+1 for hiding ghost text for blurred text editor.

+1 for hiding ghost text for blurred text editor.

Implemented.

Unfortunately, the hover used to cycle through inline suggestions also takes the focus from the editor as soon as the user clicks on it.

Thus, we cannot hide the ghost text when the editor loses focus.

I don't know how to not hide the ghost text when the hover gets focus. Even worse, when the hover gets the focus and then loses it to something else (e.g. the sidebar), the ghost text should also hide, but this is even harder to detect.

Is there no concept that says whether focus is inside the editor or inside an editor widget? I thought there was a context key for that case.

There is, but it does not work:

#133518 seems to fixes this, but I have no idea why.
This seems to be a different incarnation of #133517.

It is also a time grave. I've already spent quite some time debugging this stuff.
@alexdima had the insight that the other issue is caused by electron interpreting the two clicks as single double-click, but I have no idea why this causes focus problems.

I moved this to october, as the PR that fixes the fix for this will also be merged not before next milestone (due to vacation).