golang.org/x/tools/gopls@v0.15.3/internal/server/hover.go (about)

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package server
     6  
     7  import (
     8  	"context"
     9  
    10  	"golang.org/x/tools/gopls/internal/file"
    11  	"golang.org/x/tools/gopls/internal/golang"
    12  	"golang.org/x/tools/gopls/internal/mod"
    13  	"golang.org/x/tools/gopls/internal/protocol"
    14  	"golang.org/x/tools/gopls/internal/telemetry"
    15  	"golang.org/x/tools/gopls/internal/template"
    16  	"golang.org/x/tools/gopls/internal/work"
    17  	"golang.org/x/tools/internal/event"
    18  	"golang.org/x/tools/internal/event/tag"
    19  )
    20  
    21  func (s *server) Hover(ctx context.Context, params *protocol.HoverParams) (_ *protocol.Hover, rerr error) {
    22  	recordLatency := telemetry.StartLatencyTimer("hover")
    23  	defer func() {
    24  		recordLatency(ctx, rerr)
    25  	}()
    26  
    27  	ctx, done := event.Start(ctx, "lsp.Server.hover", tag.URI.Of(params.TextDocument.URI))
    28  	defer done()
    29  
    30  	fh, snapshot, release, err := s.fileOf(ctx, params.TextDocument.URI)
    31  	if err != nil {
    32  		return nil, err
    33  	}
    34  	defer release()
    35  
    36  	switch snapshot.FileKind(fh) {
    37  	case file.Mod:
    38  		return mod.Hover(ctx, snapshot, fh, params.Position)
    39  	case file.Go:
    40  		return golang.Hover(ctx, snapshot, fh, params.Position)
    41  	case file.Tmpl:
    42  		return template.Hover(ctx, snapshot, fh, params.Position)
    43  	case file.Work:
    44  		return work.Hover(ctx, snapshot, fh, params.Position)
    45  	}
    46  	return nil, nil // empty result
    47  }