terminal.py 文件源码

def cursor_right(self, n=1):
        """ESCnC CUF (Cursor Forward)"""
        #logging.debug('cursor_right(%s)' % n)
        if not n:
            n = 1
        n = int(n)
        # This logic takes care of double-width unicode characters
        if self.double_width_right:
            self.double_width_right = False
            return
        self.cursorX += n
        try:
            char = self.screen[self.cursorY][self.cursorX]
        except IndexError: # Cursor is past the right-edge of the screen; ignore
            char = u' ' # This is a safe default/fallback
        if unicodedata.east_asian_width(char) == 'W':
            # This lets us skip the next call (get called 2x for 2x width)
            self.double_width_right = True
        try:
            for callback in self.callbacks[CALLBACK_CURSOR_POS].values():
                callback()
        except TypeError:
            pass