52 lines
758 B
Go
52 lines
758 B
Go
package line
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import "strings"
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func (l *Line) Append(s string) {
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l.data = l.data + s
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}
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func (l *Line) DeleteRune(index int) (deleted rune) {
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if index < 0 || index >= len(l.data) {
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return
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}
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var str strings.Builder
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for i, r := range l.data {
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if i == index {
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deleted = r
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continue
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}
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str.WriteRune(r)
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}
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l.data = str.String()
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return deleted
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}
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func (l *Line) Insert(index int, nr rune) {
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if index < 0 || index > len(l.data) {
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return
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}
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var str strings.Builder
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switch {
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// Handle empty lines and the end of the line.
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case index == len(l.data):
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str.WriteString(l.data)
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str.WriteRune(nr)
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default:
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for i, r := range l.data {
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if i == index {
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str.WriteRune(nr)
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}
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str.WriteRune(r)
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}
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}
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l.data = str.String()
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}
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