Simple way to get completion results programatically for an offset in a source file ?

Hi, I'm trying to go from a (PsiFile, offset) -> [list of completion results]. Essentially, I'm interested in seeing what Idea has to say about possible completion at a certain point in a file, in a "background" / programmatic manner.

I looked at existing open-source plugins, but I couldn't find any way of getting completion results, only

I also tried:

1. JavaCompletionUtil
2. JavaCompletionData

In both cases, the problem seems to be that:

1. It doesn't work.
2. I can't call the lower level APIs because I can't instantiate a CompletionParameters object

Is this possible ? Is there an example on how to do this ? Am I on the right track ?

Any help is appreciated.

/A

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I'm also trying to do something like this. In my case I want to report the possible completions to a speech engine so that a user can effectively code by voice using the words IDEA knows to be valid at any given point. What would be the best way to accomplish this?

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I'm also trying to do something like this.  I chased my tail around the completion code for a couple hours today and ended up hitting the same wall as Andrei.  I can't call performCompletion because I can't create the CompletionParameters object, because its constructor isn't public.

My use case is that I'm trying to implement a Language Server Protocol[1] server using Intellij to serve requests, so we can edit in Vim/Emacs/etc and use Intellij's PSI framework to do the heavy lifting of parsing Java/Scala.  I've gotten things like Go To Definition working, but now I'm hitting a wall at tab completion.

What's the correct way to go about doing this?

[1]: https://langserver.org/ 

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The completion API is not designed to be used in this way, so there is no API to do what you need. What exactly do you want to accomplish?

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