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