microsoft / microsoft/language-server-protocol

Pass a selection range in CompletionParams for a completion request

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completion feature-request
Dominant language
TypeScript
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Description

related to #377

It would be very useful for the completion request interface to support sending selection ranges instead of being limited to a cursor position.

Examples of scenarios where this would be useful:

  • the user selects an expression and wants to replace it
  • the user inserts a snippet (perhaps from a previous completion), and wants completions for a selected placeholder

This is a serious deficiency, because there is no way for the server to infer the intent of the user to replace the selection with a completion. That intent must inform the returned completions set.

A possible further extension of this is to support multi-cursor and multi-selection completions.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the CompletionParams definition and the completion request interface in the language server protocol specification, then review related issue #377. Define how a selection range should be represented and transmitted, including whether multi-cursor or multi-selection completion is in scope; done means the protocol proposal clearly specifies the request shape and its intended behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
typescript
Domain
backend-api-design
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
30/100

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