blob: 2a60599e6e9983fd41a61e5a50ad5c837d202289 [file] [log] [blame]
// Copyright 2019 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"
)
func (s *Server) hover(ctx context.Context, params *protocol.HoverParams) (*protocol.Hover, error) {
uri := span.NewURI(params.TextDocument.URI)
view, err := s.session.ViewOf(uri)
if err != nil {
return nil, err
}
snapshot := view.Snapshot()
fh, err := snapshot.GetFile(ctx, uri)
if err != nil {
return nil, err
}
if fh.Identity().Kind != source.Go {
return nil, nil
}
ident, err := source.Identifier(ctx, snapshot, fh, params.Position, source.WidestCheckPackageHandle)
if err != nil {
return nil, nil
}
h, err := ident.Hover(ctx)
if err != nil {
return nil, err
}
rng, err := ident.Range()
if err != nil {
return nil, err
}
hover, err := source.FormatHover(h, view.Options())
if err != nil {
return nil, err
}
return &protocol.Hover{
Contents: protocol.MarkupContent{
Kind: view.Options().PreferredContentFormat,
Value: hover,
},
Range: rng,
}, nil
}