form.py 文件源码

def hidden_tag(self, *fields):
        """
        Wraps hidden fields in a hidden DIV tag, in order to keep XHTML
        compliance.

        .. versionadded:: 0.3

        :param fields: list of hidden field names. If not provided will render
                       all hidden fields, including the CSRF field.
        """

        if not fields:
            fields = [f for f in self if _is_hidden(f)]

        name = current_app.config.get('WTF_HIDDEN_TAG', 'div')
        attrs = current_app.config.get(
            'WTF_HIDDEN_TAG_ATTRS', {'style': 'display:none;'})

        tag_attrs = u' '.join(
            u'%s="%s"' % (escape(k), escape(v)) for k, v in attrs.items())
        tag_start = u'<%s %s>' % (escape(name), tag_attrs)
        tag_end = u'</%s>' % escape(name)

        rv = [tag_start]
        for field in fields:
            if isinstance(field, string_types):
                field = getattr(self, field)
            rv.append(text_type(field))
        rv.append(tag_end)

        return Markup(u"".join(rv))