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// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package cmd
import (
"context"
"flag"
"fmt"
"golang.org/x/tools/internal/lsp/protocol"
"golang.org/x/tools/internal/span"
"golang.org/x/tools/internal/tool"
)
// foldingRanges implements the folding_ranges verb for gopls
type foldingRanges struct {
app *Application
}
func (r *foldingRanges) Name() string { return "folding_ranges" }
func (r *foldingRanges) Usage() string { return "<file>" }
func (r *foldingRanges) ShortHelp() string { return "display selected file's folding ranges" }
func (r *foldingRanges) DetailedHelp(f *flag.FlagSet) {
fmt.Fprint(f.Output(), `
Example:
$ gopls folding_ranges helper/helper.go
`)
f.PrintDefaults()
}
func (r *foldingRanges) Run(ctx context.Context, args ...string) error {
if len(args) != 1 {
return tool.CommandLineErrorf("folding_ranges expects 1 argument (file)")
}
conn, err := r.app.connect(ctx)
if err != nil {
return err
}
defer conn.terminate(ctx)
from := span.Parse(args[0])
file := conn.AddFile(ctx, from.URI())
if file.err != nil {
return file.err
}
p := protocol.FoldingRangeParams{
TextDocument: protocol.TextDocumentIdentifier{
URI: protocol.URIFromSpanURI(from.URI()),
},
}
ranges, err := conn.FoldingRange(ctx, &p)
if err != nil {
return err
}
for _, r := range ranges {
fmt.Printf("%v:%v-%v:%v\n",
r.StartLine+1,
r.StartCharacter+1,
r.EndLine+1,
r.EndCharacter,
)
}
return nil
}
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