git.iko.soy/crush
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crush/internal/ui/diffview/split.go
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1package diffview
3import (
4 "slices"
6 "github.com/aymanbagabas/go-udiff"
7 "github.com/charmbracelet/x/exp/slice"
8)
10type splitHunk struct {
11 fromLine int
12 toLine int
13 lines []*splitLine
16type splitLine struct {
17 before *udiff.Line
18 after *udiff.Line
21func hunkToSplit(h *udiff.Hunk) (sh splitHunk) {
22 lines := slices.Clone(h.Lines)
23 sh = splitHunk{
24 fromLine: h.FromLine,
25 toLine: h.ToLine,
26 lines: make([]*splitLine, 0, len(lines)),
27 }
29 for {
30 var ul udiff.Line
31 var ok bool
32 ul, lines, ok = slice.Shift(lines)
33 if !ok {
34 break
35 }
37 var sl splitLine
39 switch ul.Kind {
40 // For equal lines, add as is
41 case udiff.Equal:
42 sl.before = &ul
43 sl.after = &ul
45 // For inserted lines, set after and keep before as nil
46 case udiff.Insert:
47 sl.before = nil
48 sl.after = &ul
50 // For deleted lines, set before and loop over the next lines
51 // searching for the equivalent after line.
52 case udiff.Delete:
53 sl.before = &ul
55 inner:
56 for i, l := range lines {
57 switch l.Kind {
58 case udiff.Insert:
59 var ll udiff.Line
60 ll, lines, _ = slice.DeleteAt(lines, i)
61 sl.after = &ll
62 break inner
63 case udiff.Equal:
64 break inner
65 }
66 }
67 }
69 sh.lines = append(sh.lines, &sl)
70 }
72 return sh