51 lines
648 B
Go
51 lines
648 B
Go
package editor
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import "strings"
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func TruncateString(s string, length int) string {
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if length < 1 {
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return ""
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}
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var buf strings.Builder
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count := 0
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for _, char := range s {
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if count == length {
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break
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}
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buf.WriteRune(char)
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count++
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}
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return buf.String()
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}
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func isAscii(char rune) bool {
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ord := int(char)
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return ord < 0x80
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}
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func IsCtrl(char rune) bool {
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if !isAscii(char) {
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return false
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}
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ord := int(char)
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return ord == 0x7f || ord < 0x20
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}
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// Return the input code of a Ctrl-key chord.
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func Ctrl(char rune) rune {
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ord := int(char)
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raw := ord & 0x1f
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if !IsCtrl(rune(raw)) {
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return 0
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}
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return rune(raw)
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} |