text.py 文件源码

def _text_chars(self, length, truncate, text, truncate_len):
        """
        Truncates a string after a certain number of chars.
        """
        s_len = 0
        end_index = None
        for i, char in enumerate(text):
            if unicodedata.combining(char):
                # Don't consider combining characters
                # as adding to the string length
                continue
            s_len += 1
            if end_index is None and s_len > truncate_len:
                end_index = i
            if s_len > length:
                # Return the truncated string
                return self.add_truncation_text(text[:end_index or 0],
                                                truncate)

        # Return the original string since no truncation was necessary
        return text