return
			}
		}
		if !isPrintable(key) {
			return
		}
		if len(t.line) == maxLineLength {
			return
		}
		t.addKeyToLine(key)
	}
	return
}

// addKeyToLine inserts the given key at the current position in the current
// line.
func (t *Terminal) addKeyToLine(key rune) {
	if len(t.line) == cap(t.line) {
		newLine := make([]rune, len(t.line), 2*(1+len(t.line)))
		copy(newLine, t.line)