mirror of
https://github.com/golang/go
synced 2024-11-19 04:54:41 -07:00
156eb2ae29
This is a straight move of some code with no changes. It splits the part of the telemetry code that will become a standalone library from the bit that belongs in the lsp. Change-Id: Icedb6bf1f3711da9251450531729984df6df7787 Reviewed-on: https://go-review.googlesource.com/c/tools/+/190403 Run-TryBot: Ian Cottrell <iancottrell@google.com> Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package lsp
|
|
|
|
import (
|
|
"context"
|
|
|
|
"golang.org/x/tools/internal/lsp/protocol"
|
|
"golang.org/x/tools/internal/lsp/source"
|
|
"golang.org/x/tools/internal/span"
|
|
"golang.org/x/tools/internal/telemetry/log"
|
|
"golang.org/x/tools/internal/telemetry/tag"
|
|
)
|
|
|
|
func (s *Server) signatureHelp(ctx context.Context, params *protocol.TextDocumentPositionParams) (*protocol.SignatureHelp, error) {
|
|
uri := span.NewURI(params.TextDocument.URI)
|
|
view := s.session.ViewOf(uri)
|
|
f, m, err := getGoFile(ctx, view, uri)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
spn, err := m.PointSpan(params.Position)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
rng, err := spn.Range(m.Converter)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
info, err := source.SignatureHelp(ctx, f, rng.Start)
|
|
if err != nil {
|
|
log.Print(ctx, "no signature help", tag.Of("At", rng), tag.Of("Failure", err))
|
|
return nil, nil
|
|
}
|
|
return toProtocolSignatureHelp(info), nil
|
|
}
|
|
|
|
func toProtocolSignatureHelp(info *source.SignatureInformation) *protocol.SignatureHelp {
|
|
return &protocol.SignatureHelp{
|
|
ActiveParameter: float64(info.ActiveParameter),
|
|
ActiveSignature: 0, // there is only ever one possible signature
|
|
Signatures: []protocol.SignatureInformation{
|
|
{
|
|
Label: info.Label,
|
|
Documentation: info.Documentation,
|
|
Parameters: toProtocolParameterInformation(info.Parameters),
|
|
},
|
|
},
|
|
}
|
|
}
|
|
|
|
func toProtocolParameterInformation(info []source.ParameterInformation) []protocol.ParameterInformation {
|
|
var result []protocol.ParameterInformation
|
|
for _, p := range info {
|
|
result = append(result, protocol.ParameterInformation{
|
|
Label: p.Label,
|
|
})
|
|
}
|
|
return result
|
|
}
|