Show package information in code completion

[ntluong95]

System details:

Positron and OS details:

Positron Version: 2024.11.0 (system setup) build 116
Code - OSS Version: 1.93.0
Commit: 8b1688a
Date: 2024-10-28T02:47:45.218Z
Electron: 30.4.0
Chromium: 124.0.6367.243
Node.js: 20.15.1
V8: 12.4.254.20-electron.0
OS: Windows_NT x64 10.0.22621

Interpreter details:

R 4.3.2

Describe the issue:

In Rstudio, when you call function, methods, it will show for you from where the method come from. It will be nice if we can have it in Positron

Steps to reproduce the issue:

Expected or desired behavior:

[lionel-]

I agree it's very useful to see the package in the completion list.

There are two relevant fields for CompletionItem:

• detail, which we currently use for displaying function parameters. This is the legacy field in the LSP spec. In the VSCode/Positron UI, it's hidden by default and only appears for the item currently selected.

• label_details, a newer field discussed in Consider showing completion item detail if available for all list items microsoft/vscode#39441. It has two sub-fields detail and description. The former is meant for function parameters and is appended directly to the label without space (e.g. the label might be mean and label_details.detail would be (x, ...). The description field is shown on the right. Both of these fields are always shown at all times for all items in the completion lists.

When label_details is supplied, detail is ignored. The server can provide both so that older clients that only understand detail still work as before.

So I think we have the following options.

• First, here is how things look like today:
  https://github.com/user-attachments/assets/98d03345-8a4f-4fd5-a78a-a1bbe8f5a456

• If we provide label_details with both fields we get a rather dense completion list. Also the package is ellipsised when the parameter list gets too large
  https://github.com/user-attachments/assets/ec13a0c9-f33b-42a7-825b-e2519c689503

• Since we have many other ways to get information about the parameter lists, in hover or in the completion doc, I suggest we only provide the package name:
  https://github.com/user-attachments/assets/206212a0-4f0f-4f25-b23e-b0b421cac8e0

  This last option is implemented in Add package information in completions ark#616

[ntluong95]

That's fast, thanks so much @lionel- I agree that the parameter list there is usually useless, so good to replace by the package source information. Much more useful