.config/coc/extensions/coc-go-data/tools/pkg/mod/golang.org/x/tools/gopls@v0.5.2/internal/hooks/diff.go

   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 hooks
   6
   7 import (
   8         "github.com/sergi/go-diff/diffmatchpatch"
   9         "golang.org/x/tools/internal/lsp/diff"
  10         "golang.org/x/tools/internal/span"
  11 )
  12
  13 func ComputeEdits(uri span.URI, before, after string) []diff.TextEdit {
  14         diffs := diffmatchpatch.New().DiffMain(before, after, true)
  15         edits := make([]diff.TextEdit, 0, len(diffs))
  16         offset := 0
  17         for _, d := range diffs {
  18                 start := span.NewPoint(0, 0, offset)
  19                 switch d.Type {
  20                 case diffmatchpatch.DiffDelete:
  21                         offset += len(d.Text)
  22                         edits = append(edits, diff.TextEdit{Span: span.New(uri, start, span.NewPoint(0, 0, offset))})
  23                 case diffmatchpatch.DiffEqual:
  24                         offset += len(d.Text)
  25                 case diffmatchpatch.DiffInsert:
  26                         edits = append(edits, diff.TextEdit{Span: span.New(uri, start, span.Point{}), NewText: d.Text})
  27                 }
  28         }
  29         return edits
  30 }