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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>
52 lines
1.5 KiB
Go
52 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/event"
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"golang.org/x/tools/internal/lsp/debug/tag"
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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) documentSymbol(ctx context.Context, params *protocol.DocumentSymbolParams) ([]interface{}, error) {
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ctx, done := event.Start(ctx, "lsp.Server.documentSymbol")
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defer done()
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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 []interface{}{}, err
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}
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docSymbols, err := source.DocumentSymbols(ctx, snapshot, fh)
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if err != nil {
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event.Error(ctx, "DocumentSymbols failed", err, tag.URI.Of(fh.URI()))
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return []interface{}{}, nil
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}
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// Convert the symbols to an interface array.
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// TODO: Remove this once the lsp deprecates SymbolInformation.
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symbols := make([]interface{}, len(docSymbols))
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for i, s := range docSymbols {
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if snapshot.View().Options().HierarchicalDocumentSymbolSupport {
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symbols[i] = s
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continue
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}
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// If the client does not support hierarchical document symbols, then
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// we need to be backwards compatible for now and return SymbolInformation.
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symbols[i] = protocol.SymbolInformation{
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Name: s.Name,
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Kind: s.Kind,
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Deprecated: s.Deprecated,
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Location: protocol.Location{
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URI: params.TextDocument.URI,
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Range: s.Range,
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},
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}
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}
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return symbols, nil
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}
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