blob: 7d9ae2c0c4ed20e69c3008b3fbceb56d6c20c681 [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"
"fmt"
"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.TextDocumentPositionParams) (*protocol.Hover, error) {
uri := span.NewURI(params.TextDocument.URI)
view := s.findView(ctx, uri)
f, m, err := newColumnMap(ctx, view, uri)
if err != nil {
return nil, err
}
spn, err := m.PointSpan(params.Position)
if err != nil {
return nil, err
}
identRange, err := spn.Range(m.Converter)
if err != nil {
return nil, err
}
ident, err := source.Identifier(ctx, view, f, identRange.Start)
if err != nil {
return nil, err
}
hover, err := ident.Hover(ctx, nil, s.enhancedHover, s.preferredContentFormat == protocol.Markdown)
if err != nil {
return nil, err
}
identSpan, err := ident.Range.Span()
if err != nil {
return nil, err
}
rng, err := m.Range(identSpan)
if err != nil {
return nil, err
}
return &protocol.Hover{
Contents: protocol.MarkupContent{
Kind: s.preferredContentFormat,
Value: hover,
},
Range: &rng,
}, nil
}
func markupContent(decl, doc string, kind protocol.MarkupKind) protocol.MarkupContent {
result := protocol.MarkupContent{
Kind: kind,
}
switch kind {
case protocol.PlainText:
result.Value = decl
case protocol.Markdown:
result.Value = "```go\n" + decl + "\n```"
}
if doc != "" {
result.Value = fmt.Sprintf("%s\n%s", doc, result.Value)
}
return result
}