--- /dev/null
+// 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"
+)
+
+func (s *Server) rename(ctx context.Context, params *protocol.RenameParams) (*protocol.WorkspaceEdit, error) {
+ snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.Go)
+ defer release()
+ if !ok {
+ return nil, err
+ }
+ edits, err := source.Rename(ctx, snapshot, fh, params.Position, params.NewName)
+ if err != nil {
+ return nil, err
+ }
+
+ var docChanges []protocol.TextDocumentEdit
+ for uri, e := range edits {
+ fh, err := snapshot.GetVersionedFile(ctx, uri)
+ if err != nil {
+ return nil, err
+ }
+ docChanges = append(docChanges, documentChanges(fh, e)...)
+ }
+ return &protocol.WorkspaceEdit{
+ DocumentChanges: docChanges,
+ }, nil
+}
+
+func (s *Server) prepareRename(ctx context.Context, params *protocol.PrepareRenameParams) (*protocol.Range, error) {
+ snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.Go)
+ defer release()
+ if !ok {
+ return nil, err
+ }
+ // Do not return errors here, as it adds clutter.
+ // Returning a nil result means there is not a valid rename.
+ item, err := source.PrepareRename(ctx, snapshot, fh, params.Position)
+ if err != nil {
+ return nil, nil // ignore errors
+ }
+ // TODO(suzmue): return ident.Name as the placeholder text.
+ return &item.Range, nil
+}