github.com/april1989/origin-go-tools@v0.0.32/internal/lsp/cmd/folding_range.go (about)

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package cmd
     6  
     7  import (
     8  	"context"
     9  	"flag"
    10  	"fmt"
    11  
    12  	"github.com/april1989/origin-go-tools/internal/lsp/protocol"
    13  	"github.com/april1989/origin-go-tools/internal/span"
    14  	"github.com/april1989/origin-go-tools/internal/tool"
    15  )
    16  
    17  // foldingRanges implements the folding_ranges verb for gopls
    18  type foldingRanges struct {
    19  	app *Application
    20  }
    21  
    22  func (r *foldingRanges) Name() string      { return "folding_ranges" }
    23  func (r *foldingRanges) Usage() string     { return "<file>" }
    24  func (r *foldingRanges) ShortHelp() string { return "display selected file's folding ranges" }
    25  func (r *foldingRanges) DetailedHelp(f *flag.FlagSet) {
    26  	fmt.Fprint(f.Output(), `
    27  Example:
    28  
    29    $ gopls folding_ranges helper/helper.go
    30  `)
    31  	f.PrintDefaults()
    32  }
    33  
    34  func (r *foldingRanges) Run(ctx context.Context, args ...string) error {
    35  	if len(args) != 1 {
    36  		return tool.CommandLineErrorf("folding_ranges expects 1 argument (file)")
    37  	}
    38  
    39  	conn, err := r.app.connect(ctx)
    40  	if err != nil {
    41  		return err
    42  	}
    43  	defer conn.terminate(ctx)
    44  
    45  	from := span.Parse(args[0])
    46  	file := conn.AddFile(ctx, from.URI())
    47  	if file.err != nil {
    48  		return file.err
    49  	}
    50  
    51  	p := protocol.FoldingRangeParams{
    52  		TextDocument: protocol.TextDocumentIdentifier{
    53  			URI: protocol.URIFromSpanURI(from.URI()),
    54  		},
    55  	}
    56  
    57  	ranges, err := conn.FoldingRange(ctx, &p)
    58  	if err != nil {
    59  		return err
    60  	}
    61  
    62  	for _, r := range ranges {
    63  		fmt.Printf("%v:%v-%v:%v\n",
    64  			r.StartLine+1,
    65  			r.StartCharacter+1,
    66  			r.EndLine+1,
    67  			r.EndCharacter,
    68  		)
    69  	}
    70  
    71  	return nil
    72  }