| // 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 |
| } |