text.py 文件源码

def _wrap_chunks(self, chunks):
        """_wrap_chunks(chunks : [string]) -> [string]

        The original _wrap_chunks uses len() to calculate width.
        This method respects wide/fullwidth characters for width adjustment.
        """
        drop_whitespace = getattr(self, 'drop_whitespace', True)  # py25 compat
        lines = []
        if self.width <= 0:
            raise ValueError("invalid width %r (must be > 0)" % self.width)

        chunks.reverse()

        while chunks:
            cur_line = []
            cur_len = 0

            if lines:
                indent = self.subsequent_indent
            else:
                indent = self.initial_indent

            width = self.width - column_width(indent)

            if drop_whitespace and chunks[-1].strip() == '' and lines:
                del chunks[-1]

            while chunks:
                l = column_width(chunks[-1])

                if cur_len + l <= width:
                    cur_line.append(chunks.pop())
                    cur_len += l

                else:
                    break

            if chunks and column_width(chunks[-1]) > width:
                self._handle_long_word(chunks, cur_line, cur_len, width)

            if drop_whitespace and cur_line and cur_line[-1].strip() == '':
                del cur_line[-1]

            if cur_line:
                lines.append(indent + ''.join(cur_line))

        return lines