用python将%格式化字符串转换成xliff格式

1. xliff是什么

xliff是Android中的用以格式化字符串的一种东西。%d这种会转换成<xliff:g id="xxx">%1$d</xliff:g>这种。

具体见 https://developer.android.com/guide/topics/resources/string-resource.html

2. 代码

class XliffMaker(object):
    """class for XliffMaker"""
    def __init__(self, s):
        super(XliffMaker, self).__init__()
        self.s = s

    def make(self):
        reg = re.compile(STRING_REGEX)
        idx = 1
        targetStrHead = '<xliff:g id="FMT_STR_ID">'
        targetStrBoot = '</xliff:g>'
        targetStr = targetStrHead
        mediemStr = ""

        otherStrList = reg.split(self.s)

        replacedList = []
        for m in reg.finditer(self.s):
            s0 = m.group()
            s1 = ""
            if 'd' in s0:
                reg0 = re.compile(r'%(\d+)d')
                s1 = '%%%d$%sd' % (idx, reg0.search('%2d').group(1))
            elif 's' in s0:
                s1 = '%%%d$s' % idx
            replacedList.append(s1)
            idx = idx + 1

        ret = zip(otherStrList, replacedList)
        for t in ret:
            mediemStr = mediemStr + "".join(t)
        mediemStr = mediemStr + otherStrList[-1]

        return targetStr + mediemStr + targetStrBoot

目前只支持%d和%s两种格式！其中，%d可以使用位数限制格式，例如%2d代表2位数。