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https://github.com/golang/go
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412b8bda49
To manually collect cache entries, we need to know when a snapshot is idle. Add a reference count in the form of a WaitGroup and keep track of its uses. The pattern is that any time a snapshot is returned, it comes with a release function that decrements the ref count. Almost all uses of a snapshot originate in a user-facing request, handled in beginFileRequest. There it's mostly an exercise in passing Snapshots around instead of Views. In the other places I took the path of least resistance. For file modifications I tried to minimize the amount of code that needed to deal with snapshots. For diagnostics I just acquired the snapshot at the diagnostics call. Change-Id: Id48a2df3acdd97f27d905e2c2be23072f28f196b Reviewed-on: https://go-review.googlesource.com/c/tools/+/241837 Run-TryBot: Heschi Kreinick <heschi@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package lsp
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import (
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"context"
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"golang.org/x/tools/internal/lsp/protocol"
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"golang.org/x/tools/internal/lsp/source"
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)
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func (s *Server) rename(ctx context.Context, params *protocol.RenameParams) (*protocol.WorkspaceEdit, error) {
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snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.Go)
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defer release()
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if !ok {
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return nil, err
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}
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edits, err := source.Rename(ctx, snapshot, fh, params.Position, params.NewName)
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if err != nil {
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return nil, err
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}
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var docChanges []protocol.TextDocumentEdit
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for uri, e := range edits {
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fh, err := snapshot.GetFile(ctx, uri)
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if err != nil {
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return nil, err
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}
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docChanges = append(docChanges, documentChanges(fh, e)...)
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}
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return &protocol.WorkspaceEdit{
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DocumentChanges: docChanges,
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}, nil
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}
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func (s *Server) prepareRename(ctx context.Context, params *protocol.PrepareRenameParams) (*protocol.Range, error) {
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snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.Go)
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defer release()
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if !ok {
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return nil, err
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}
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// Do not return errors here, as it adds clutter.
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// Returning a nil result means there is not a valid rename.
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item, err := source.PrepareRename(ctx, snapshot, fh, params.Position)
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if err != nil {
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return nil, nil // ignore errors
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}
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// TODO(suzmue): return ident.Name as the placeholder text.
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return &item.Range, nil
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}
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