mirror of
https://github.com/golang/go
synced 2024-10-01 05:18:33 -06:00
27d1b4e4f3
This replaces the definition of ApplyEdits to be more like that in go vet -fix, so that we can apply the results of suggested fixes. Change-Id: Ib5724139464954e3790bc51ed1edc3ce4b2115ff Reviewed-on: https://go-review.googlesource.com/c/tools/+/193959 Run-TryBot: Michael Matloob <matloob@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package diff
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import (
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"fmt"
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"strings"
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"golang.org/x/tools/internal/lsp/diff/myers"
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"golang.org/x/tools/internal/span"
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)
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func init() {
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ComputeEdits = myersComputeEdits
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ToUnified = myersToUnified
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}
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func myersComputeEdits(uri span.URI, before, after string) []TextEdit {
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u := myers.SplitLines(before)
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f := myers.SplitLines(after)
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return myersDiffToEdits(uri, myers.Operations(u, f))
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}
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func myersToUnified(from, to string, before string, edits []TextEdit) string {
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u := myers.SplitLines(before)
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ops := myersEditsToDiff(edits)
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return fmt.Sprint(myers.ToUnified(from, to, u, ops))
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}
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func myersDiffToEdits(uri span.URI, ops []*myers.Op) []TextEdit {
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edits := make([]TextEdit, 0, len(ops))
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for _, op := range ops {
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s := span.New(uri, span.NewPoint(op.I1+1, 1, 0), span.NewPoint(op.I2+1, 1, 0))
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switch op.Kind {
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case myers.Delete:
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// Delete: unformatted[i1:i2] is deleted.
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edits = append(edits, TextEdit{Span: s})
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case myers.Insert:
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// Insert: formatted[j1:j2] is inserted at unformatted[i1:i1].
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if content := strings.Join(op.Content, ""); content != "" {
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edits = append(edits, TextEdit{Span: s, NewText: content})
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}
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}
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}
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return edits
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}
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func myersEditsToDiff(edits []TextEdit) []*myers.Op {
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iToJ := 0
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ops := make([]*myers.Op, len(edits))
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for i, edit := range edits {
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i1 := edit.Span.Start().Line() - 1
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i2 := edit.Span.End().Line() - 1
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kind := myers.Insert
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if edit.NewText == "" {
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kind = myers.Delete
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}
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ops[i] = &myers.Op{
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Kind: kind,
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Content: myers.SplitLines(edit.NewText),
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I1: i1,
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I2: i2,
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J1: i1 + iToJ,
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}
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if kind == myers.Insert {
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iToJ += len(ops[i].Content)
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} else {
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iToJ -= i2 - i1
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}
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}
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return ops
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}
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