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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>
29 lines
765 B
Go
29 lines
765 B
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/mod"
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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) hover(ctx context.Context, params *protocol.HoverParams) (*protocol.Hover, error) {
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snapshot, fh, ok, release, err := s.beginFileRequest(ctx, params.TextDocument.URI, source.UnknownKind)
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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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switch fh.Kind() {
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case source.Mod:
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return mod.Hover(ctx, snapshot, fh, params.Position)
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case source.Go:
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return source.Hover(ctx, snapshot, fh, params.Position)
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}
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return nil, nil
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}
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