Custom completion provider - Prevent all words in the document matching the typed text as suggestions

[shutterfreak]

I'm creating a custom completion provider for my DSL, and I'm extending DefaultCompletionProvider.

It's working right for properties, but not yet for references.

When implementing the completion for references, I'm tying to restrict the completion suggestions to specific entries only. I can see that the candidates are correctly filtered from my scope provider, and I can also see when 0 matches are found. Unfortunately, when there are no matches, I keep getting completion suggestions from all existing words in the document. How can this default / fall-back be prevented?

[msujew]

Hey @shutterfreak,

this is not Langium behavior (as it is correctly returning an empty result), see the editor.wordBasedSuggestions setting of VS Code:

[shutterfreak]

If I set editor.wordBasedSuggestions to off, then the completions no longer work. So this is something that cannot be prevented at all?

[msujew]

If I set editor.wordBasedSuggestions to off, then the completions no longer work.

But they work when the setting is turned on? I'm confused, it does work as expected for me with a Langium based language server:

[shutterfreak]

If I set the setting to "off" in my workspace running the vs code extension, then the entire completion service is disabled.

[msujew]

Even for other languages like TypeScript? That seems rather weird and looks like an issue for the vscode repo. We can't really help you with that.

[shutterfreak]

If I set editor.wordBasedSuggestions to off in my TypeScript workspace, then autocompletion works.

I'll probably have to recheck my completion provider implementation.

UPDATE: it was my completionForLinkReference() method which was interfering. I commented it out and completion now works again (with the default reference completion provider).

Where should I add "editor.wordBasedSuggestions": "off" for my extension? Is that in package.json in the project root folder, or in language-configuration.json?