Writing a VS extension and want to get the fully qualified type of the C# text in the editor I am mousing over

Question

I have a working VS extension in VS 2019
I trigger events when mousing over text in the editor (in this case, C#)
My extension receives an EventArgs (actually MouseHoverEventArgs), which I can use to access the textPosition, and can get the line I'm mousing over as text

Question: How do I get this with syntactic context? i.e. a set of tokens for the line / area I am mousing over, in a way that I can generate the fully scoped name of the type? i.e. how do I hook into the syntactic content of the editor's live evaluation of the syntax of the file?

I'd want something like: private string GetTypeOfMousedOverToken(EventArgs e)

score 1 · Answer 1 · answered May 27 '21 at 03:27

1

You can use following code to get syntactic context:

Microsoft.VisualStudio.Text.SnapshotPoint caretPosition = textView.Caret.Position.BufferPosition;
Microsoft.CodeAnalysis.Document document = caretPosition.Snapshot.GetOpenDocumentInCurrentContextWithChanges();
document.GetSyntaxRootAsync().Result.FindToken(caretPosition)

See https://vlasovstudio.com/visual-commander/commands.html#CreateTypedVariable for a complete example.

answered May 27 '21 at 03:27

Sergey Vlasov

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required usings: `using Microsoft.CodeAnalysis.Text;` – fastmultiplication May 27 '21 at 21:04
making it specific to the context (MouseHoverEventArgs e): ``` var document = e.View.TextSnapshot.GetOpenDocumentInCurrentContextWithChanges(); var token = document.GetSyntaxRootAsync().Result.FindToken(e.Position); ``` – fastmultiplication May 27 '21 at 22:34

Writing a VS extension and want to get the fully qualified type of the C# text in the editor I am mousing over

1 Answers1