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internal/lsp: fix incremental updates and turn them on

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Updates that only add text have a start and end that are the same, we were
erroring on those and failing to apply the changes.

Fixes golang/go#31800

Change-Id: Ia31b90f108742e5532d2da35137c347c26090a6a
Reviewed-on: https://go-review.googlesource.com/c/tools/+/174949
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
This commit is contained in:
Ian Cottrell 2019-05-02 22:35:49 -04:00
parent 490d13020f
commit cf84161cff
2 changed files with 7 additions and 3 deletions
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8
internal/lsp/general.go
View File

@ -29,9 +29,13 @@ func (s *Server) initialize(ctx context.Context, params *protocol.InitializePara
}
s.isInitialized = true // mark server as initialized now
// TODO(rstambler): Change this default to protocol.Incremental (or add a
// flag). Disabled for now to simplify debugging.
// TODO(iancottrell): Change this default to protocol.Incremental and remove the option
s.textDocumentSyncKind = protocol.Full
if opts, ok := params.InitializationOptions.(map[string]interface{}); ok {
if opt, ok := opts["incrementalSync"].(bool); ok && opt {
s.textDocumentSyncKind = protocol.Incremental
}
}
s.setClientCapabilities(params.Capabilities)

2
internal/lsp/text_synchronization.go
View File

@ -64,7 +64,7 @@ func (s *Server) applyChanges(ctx context.Context, params *protocol.DidChangeTex
return "", jsonrpc2.NewErrorf(jsonrpc2.CodeInternalError, "invalid range for content change")
}
start, end := spn.Start().Offset(), spn.End().Offset()
if end <= start {
if end < start {
return "", jsonrpc2.NewErrorf(jsonrpc2.CodeInternalError, "invalid range for content change")
}
var buf bytes.Buffer