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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>
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
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) foldingRange(ctx context.Context, params *protocol.FoldingRangeParams) ([]protocol.FoldingRange, 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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ranges, err := source.FoldingRange(ctx, snapshot, fh, snapshot.View().Options().LineFoldingOnly)
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if err != nil {
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return nil, err
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}
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return toProtocolFoldingRanges(ranges)
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}
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func toProtocolFoldingRanges(ranges []*source.FoldingRangeInfo) ([]protocol.FoldingRange, error) {
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result := make([]protocol.FoldingRange, 0, len(ranges))
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for _, info := range ranges {
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rng, err := info.Range()
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if err != nil {
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return nil, err
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}
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result = append(result, protocol.FoldingRange{
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StartLine: rng.Start.Line,
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StartCharacter: rng.Start.Character,
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EndLine: rng.End.Line,
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EndCharacter: rng.End.Character,
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Kind: string(info.Kind),
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})
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}
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return result, nil
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}
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