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package diffview
import (
"slices"
"github.com/aymanbagabas/go-udiff"
"github.com/charmbracelet/x/exp/slice"
)
type splitHunk struct {
fromLine int
toLine int
lines []*splitLine
}
type splitLine struct {
before *udiff.Line
after *udiff.Line
}
func hunkToSplit(h *udiff.Hunk) (sh splitHunk) {
lines := slices.Clone(h.Lines)
sh = splitHunk{
fromLine: h.FromLine,
toLine: h.ToLine,
lines: make([]*splitLine, 0, len(lines)),
}
for {
var ul udiff.Line
var ok bool
ul, lines, ok = slice.Shift(lines)
if !ok {
break
}
var sl splitLine
switch ul.Kind {
// For equal lines, add as is
case udiff.Equal:
sl.before = &ul
sl.after = &ul
// For inserted lines, set after and keep before as nil
case udiff.Insert:
sl.before = nil
sl.after = &ul
// For deleted lines, set before and loop over the next lines
// searching for the equivalent after line.
case udiff.Delete:
sl.before = &ul
inner:
for i, l := range lines {
switch l.Kind {
case udiff.Insert:
var ll udiff.Line
ll, lines, _ = slice.DeleteAt(lines, i)
sl.after = &ll
break inner
case udiff.Equal:
break inner
}
}
}
sh.lines = append(sh.lines, &sl)
}
return
}
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