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// 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 server
import (
"context"
"golang.org/x/tools/gopls/internal/file"
"golang.org/x/tools/gopls/internal/golang"
"golang.org/x/tools/gopls/internal/label"
"golang.org/x/tools/gopls/internal/mod"
"golang.org/x/tools/gopls/internal/protocol"
"golang.org/x/tools/gopls/internal/settings"
"golang.org/x/tools/gopls/internal/telemetry"
"golang.org/x/tools/gopls/internal/template"
"golang.org/x/tools/gopls/internal/work"
"golang.org/x/tools/internal/event"
)
func (s *server) Hover(ctx context.Context, params *protocol.HoverParams) (_ *protocol.Hover, rerr error) {
recordLatency := telemetry.StartLatencyTimer("hover")
defer func() {
recordLatency(ctx, rerr)
}()
ctx, done := event.Start(ctx, "lsp.Server.hover", label.URI.Of(params.TextDocument.URI))
defer done()
fh, snapshot, release, err := s.fileOf(ctx, params.TextDocument.URI)
if err != nil {
return nil, err
}
defer release()
switch snapshot.FileKind(fh) {
case file.Mod:
return mod.Hover(ctx, snapshot, fh, params.Position)
case file.Go:
var pkgURL func(path golang.PackagePath, fragment string) protocol.URI
if snapshot.Options().LinksInHover == settings.LinksInHover_Gopls {
web, err := s.getWeb()
if err != nil {
event.Error(ctx, "failed to start web server", err)
} else {
pkgURL = func(path golang.PackagePath, fragment string) protocol.URI {
return web.PkgURL(snapshot.View().ID(), path, fragment)
}
}
}
return golang.Hover(ctx, snapshot, fh, params.Position, pkgURL)
case file.Tmpl:
return template.Hover(ctx, snapshot, fh, params.Position)
case file.Work:
return work.Hover(ctx, snapshot, fh, params.Position)
}
return nil, nil // empty result
}
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