65 lines
1002 B
Go
65 lines
1002 B
Go
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package textedit
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func sequenceEdit(e []Editor) func(rune, []any) ([]rune, []any) {
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return func(r rune, s []any) ([]rune, []any) {
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var sr []any
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rr := []rune{r}
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for i, ei := range e {
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var si any
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if len(s) > i {
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si = s[i]
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}
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rin := rr
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rr = nil
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for _, ri := range rin {
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var rout []rune
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rout, si = ei.Edit(ri, si)
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rr = append(rr, rout...)
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}
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sr = append(sr, si)
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}
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return rr, sr
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}
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}
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func sequenceRelease(e []Editor) func([]any) []rune {
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return func(s []any) []rune {
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var rr []rune
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for i, ei := range e {
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var r []rune
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if i < len(s) {
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r = ei.ReleaseState(s[i])
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}
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for _, ri := range r {
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var (
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rri []rune
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ssi []any
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)
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if i < len(s) {
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ssi = s[i:]
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}
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rri, ssi = sequenceEdit(e[i+1:])(ri, ssi)
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rr = append(rr, rri...)
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if i < len(s) {
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s = append(s[:i], ssi...)
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}
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}
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}
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return rr
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}
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}
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func sequence(e ...Editor) Editor {
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return Func(
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sequenceEdit(e),
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sequenceRelease(e),
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)
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}
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