Auto-completion issue with TextEdit

[Daniel Kruse]

When I try to auto-complete something, the text behind the cursor is overwritten.

But this happens only if the LSP server sends a TextEdit. (The problem does not occur if textEdit = null)
Here is what comes back from the LSP server that causes the issue:

[
  left = null
  right = CompletionList [
  isIncomplete = false
    items = ArrayList (
      CompletionItem [
        label = "Integer64"
        textEdit = TextEdit [
          range = Range [
            start = Position [
              line = 1
              character = 10
            ]
            end = Position [
              line = 1
              character = 13
            ]
          ]
          newText = "Integer64"
        ]
        kind = Interface
        sortText = "2)Integer64"
        commitCharacters = ArrayList (
          "."
        )
        data = {}
        detail = null
        documentation = null
        deprecated = null
        preselect = null
        filterText = null
        insertText = null
        insertTextFormat = null
        additionalTextEdits = null
        command = null
      ]
    )
  ]
] 

So why is this happening with TextEdit?

[Nikita Fedkin]

your text edit contains range to insert text. this range captures ;\r\n and insert Integer64 into it. Problem is on language server side, not the plugin. plugin does his stuff as required by the protocol

see
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textEdit
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_completion

[Daniel Kruse]

your text edit contains range to insert text. this range captures ;\r\n and insert Integer64 into it. Problem is on language server side, not the plugin. plugin does his stuff as required by the protocol

see
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textEdit
https://microsoft.github.io/language-server-protocol/specifications/specification-current/#textDocument_completion

Thank you for your fast answer @nixel2007 !

One more question.
We have been using the LSP server in VS Code for several years. The plugin has already been rolled out to the customer. Now we want to use the same LSP server for IntelliJ. Unfortunately we get the behavior described above.

In VS Code it works without problems for years. Since VS Code was created directly by Microsoft, it would be surprising if they do not follow their own specification.

[Nikita Fedkin]

In VS Code it works without problems for years. Since VS Code was created directly by Microsoft, it would be surprising if they do not follow their own specification.

Hm... it is interesting. Indeed if it works in vscode it should work in intellij. ok, lets wait for @gtache

[Christian Fuchs]

your text edit contains range to insert text. this range captures ;\r\n and insert Integer64 into it. Problem is on language server side, not the plugin. plugin does his stuff as required by the protocol

Hmm, looking at the video, counting chars to 'Int' is exactly 10. And protocol ranges are zero-based. So range 1:10-1:13 covers 'Int' not ';\r\n'

Please check again

[Trias]

I've debugged a similar issue today. It seems to be related how intellij tries to be smart about where to place the start of completion text. You may confirm if your completion is working without any predefined text.

The relevant code is in https://github.com/JetBrains/intellij-community/blob/22ab67318325e3ce280a87a2de83f517211f644c/platform/analysis-impl/src/com/intellij/codeInsight/completion/CompletionData.java#L176-L183

I hope this helps. I did not find a way to alter this behavior. Hopefully you'll find one.