[General Question] Completely stuck trying to make VS Code suggest tokens

[nsoubelet]

Hello, this is not a project's issue. Sorry about that, I hope you are fine with it, otherwise I can copy in a different place if you point me out.

Issue I created my DSL. It works on Eclipse and in Web mode. In order to be able to create a VS Code extension I followed this project's general structure. Everything works as expected but the suggestions. By suggestions I refer to the functionality one can find in the XText Web project/Eclipse in which all the possible tokens in the current context are listed by pressing ctrl+space.

Right now when pressing ctrl+space VS Code shows the list of keywords listed in the syntax, without any particular sensitivity to the context, that is, what effectively applies after certain token.

Capabilities I put some extra logs and realized that when Code initializes Language server it offers the following capabilities:

Result: {
  "capabilities": {
    "textDocumentSync": 2,
    "hoverProvider": true,
    "completionProvider": {
      "resolveProvider": false,
      "triggerCharacters": [
        "."
      ]
    },
    "signatureHelpProvider": {
      "triggerCharacters": [
        "(",
        ","
      ]
    },
    "definitionProvider": true,
    "referencesProvider": true,
    "documentHighlightProvider": true,
    "documentSymbolProvider": true,
    "workspaceSymbolProvider": true,
    "codeActionProvider": false,
    "documentFormattingProvider": true,
    "documentRangeFormattingProvider": true,
    "renameProvider": {
      "prepareProvider": true
    },
    "executeCommandProvider": {
      "commands": []
    },
    "workspace": {
      "workspaceFolders": {
        "supported": true,
        "changeNotifications": true
      }
    },
    "semanticHighlighting": {
      "scopes": []
    }
  }
}

At this point I am not sure whether I misunderstood VS Code<>Xtext (LSP4J) integration possibilities or I am missing something or doing something wrong. It seems you're the only one around that worked on this and shared your work, so maybe you can help me here.

Thanks

[cdietrich]

hi, for me this still works ootb (using my 226 wip branch) maybe your combination of vscode, lsp4j, xtext is wrong?

[nsoubelet]

Thanks! vscode, vscode-language and LSP4J I am using same versions I think. I am going to check xtext version then (currently using latest). One important thing, I am using the embedded alternative (self-contained). However as far as I understand only difference is the transport between vscode/server but not the protocol itself, so should not be differences, right?

[cdietrich]

you need to use xtext 2.26.0.m2/snapshots for latest lsp4j &lsp protocol version

[cdietrich]

@nsoubelet did that help?

[nsoubelet]

Hello @cdietrich yes it helped me! Sorry for not closing it before. In fact, I was thinking of adapting this one https://github.com/itemis/xtext-generator-vscode to generate the structure you have in this very project since seems to be, at least in my experience, the only one available in github that works with a recent xtext version.