htmlcompress.py 文件源码

def filter_stream(self, stream):
        ctx = StreamProcessContext(stream)
        strip_depth = 0
        while True:
            if stream.current.type == 'block_begin':
                if stream.look().test('name:strip') or stream.look().test(
                        'name:endstrip'):
                    stream.skip()
                    if stream.current.value == 'strip':
                        strip_depth += 1
                    else:
                        strip_depth -= 1
                        if strip_depth < 0:
                            ctx.fail('Unexpected tag endstrip')
                    stream.skip()
                    if stream.current.type != 'block_end':
                        ctx.fail(
                            'expected end of block, got %s' % describe_token(
                                stream.current))
                    stream.skip()
            if strip_depth > 0 and stream.current.type == 'data':
                ctx.token = stream.current
                value = self.normalize(ctx)
                yield Token(stream.current.lineno, 'data', value)
            else:
                yield stream.current
            next(stream)