widgets.py 文件源码

def __call__(self, field, **kwargs):
        show_input = True
        show_preview = True
        if 'only_input' in kwargs or 'only_preview' in kwargs:
            show_input = kwargs.pop('only_input', False)
            show_preview = kwargs.pop('only_preview', False)
        if not show_input and not show_preview:
            raise ValueError('One of show_input and show_preview must be true')
        html = ''
        if show_input:
            class_ = kwargs.pop('class', '').split() + \
                kwargs.pop('class_', '').split()
            class_ += ['flask-pagedown-input']
            html += pagedown_pre_html + super(PageDown, self).__call__(
                field, id='flask-pagedown-' + field.name,
                class_=' '.join(class_), **kwargs) + pagedown_post_html
        if show_preview:
            html += preview_html % {'field': field.name}
        return HTMLString(html)