text.py 文件源码

def _break_word(self, word, space_left):
        """_break_word(word : string, space_left : int) -> (string, string)

        Break line by unicode width instead of len(word).
        """
        total = 0
        for i, c in enumerate(word):
            total += column_width(c)
            if total > space_left:
                return word[:i-1], word[i-1:]
        return word, ''