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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 lsp
import (
"context"
"path/filepath"
"golang.org/x/tools/gopls/internal/lsp/protocol"
"golang.org/x/tools/gopls/internal/lsp/source"
"golang.org/x/tools/gopls/internal/span"
)
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
}
// Because we don't handle directory renaming within source.Rename, source.Rename returns
// boolean value isPkgRenaming to determine whether an DocumentChanges of type RenameFile should
// be added to the return protocol.WorkspaceEdit value.
edits, isPkgRenaming, err := source.Rename(ctx, snapshot, fh, params.Position, params.NewName)
if err != nil {
return nil, err
}
var docChanges []protocol.DocumentChanges
for uri, e := range edits {
fh, err := snapshot.GetVersionedFile(ctx, uri)
if err != nil {
return nil, err
}
docChanges = append(docChanges, documentChanges(fh, e)...)
}
if isPkgRenaming {
uri := params.TextDocument.URI.SpanURI()
oldBase := filepath.Dir(span.URI.Filename(uri))
newURI := filepath.Join(filepath.Dir(oldBase), params.NewName)
docChanges = append(docChanges, protocol.DocumentChanges{
RenameFile: &protocol.RenameFile{
Kind: "rename",
OldURI: protocol.URIFromPath(oldBase),
NewURI: protocol.URIFromPath(newURI),
},
})
}
return &protocol.WorkspaceEdit{
DocumentChanges: docChanges,
}, nil
}
// prepareRename implements the textDocument/prepareRename handler. It may
// return (nil, nil) if there is no rename at the cursor position, but it is
// not desirable to display an error to the user.
//
// TODO(rfindley): why wouldn't we want to show an error to the user, if the
// user initiated a rename request at the cursor?
func (s *Server) prepareRename(ctx context.Context, params *protocol.PrepareRenameParams) (*protocol.PrepareRename2Gn, 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, usererr, err := source.PrepareRename(ctx, snapshot, fh, params.Position)
if err != nil {
// Return usererr here rather than err, to avoid cluttering the UI with
// internal error details.
return nil, usererr
}
return &protocol.PrepareRename2Gn{
Range: item.Range,
Placeholder: item.Text,
}, nil
}
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