gilo/key/key.go
Timothy Warren 4fdb0a607c
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Slightly increase code coverage
2023-10-04 12:50:21 -04:00

47 lines
906 B
Go

package key
import (
"strings"
"unicode"
)
// ----------------------------------------------------------------------------
// !Terminal Input Escape Code Sequences
// ----------------------------------------------------------------------------
const (
Backspace = '\x7f'
Esc = '\x1b'
Enter = '\r'
)
// IsAscii Is this an ASCII character?
func IsAscii(char rune) bool {
return char <= unicode.MaxASCII
}
// IsCtrl Is this an ASCII ctrl character?
func IsCtrl(char rune) bool {
if !IsAscii(char) {
return false
}
return char == 0x7f || char < 0x20
}
// Ctrl Return the input code of a Ctrl-key chord.
func Ctrl(char rune) rune {
if !IsAscii(char) {
return 0
}
ch := char & 0x1f
return ch
}
// IsSeparator Is the character a general token separator type?
func IsSeparator(char rune) bool {
return unicode.IsSpace(char) || strings.ContainsRune(",.()+-/*=~%<>[];", char)
}