54 lines
986 B
Go
54 lines
986 B
Go
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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si := s[i]
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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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r := ei.ReleaseState(s[i])
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for _, ri := range r {
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rri, ssi := sequenceEdit(e[i+1:])(ri, s[i+1:])
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rr = append(rr, rri...)
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s = append(s[:i+1], ssi...)
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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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init := make([]any, len(e))
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for i, ei := range e {
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if initializer, ok := ei.(interface{ initialize() any }); ok {
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init[i] = initializer.initialize()
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}
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}
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return FuncInit(
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sequenceEdit(e),
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sequenceRelease(e),
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init,
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)
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}
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