web/formwidgets.py
author sylvain.thenault@logilab.fr
Thu, 26 Mar 2009 20:54:40 +0100
branchtls-sprint
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child 1273 64e1db70161b
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fix imports
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"""widget classes for form construction
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:organization: Logilab
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:copyright: 2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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"""
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__docformat__ = "restructuredtext en"
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from datetime import date
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from cubicweb.common import tags
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class FieldWidget(object):
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    needs_js = ()
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    needs_css = ()
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    setdomid = True
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    settabindex = True
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    def __init__(self, attrs=None, setdomid=None, settabindex=None):
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        self.attrs = attrs or {}
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        if setdomid is not None:
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            # override class's default value
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            self.setdomid = setdomid
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        if settabindex is not None:
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            # override class's default value
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            self.settabindex = settabindex
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    def add_media(self, form):
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        """adds media (CSS & JS) required by this widget"""
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        if self.needs_js:
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            form.req.add_js(self.needs_js)
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        if self.needs_css:
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            form.req.add_css(self.needs_css)
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    def render(self, form, field):
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        raise NotImplementedError
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    def _render_attrs(self, form, field):
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        name = form.context[field]['name']
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        values = form.context[field]['value']
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        if not isinstance(values, (tuple, list)):
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            values = (values,)
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        attrs = dict(self.attrs)
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        if self.setdomid:
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            attrs['id'] = form.context[field]['id']
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        if self.settabindex:
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            attrs['tabindex'] = form.req.next_tabindex()
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        return name, values, attrs
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class Input(FieldWidget):
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    type = None
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    def render(self, form, field):
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        self.add_media(form)
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        name, values, attrs = self._render_attrs(form, field)
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        inputs = [tags.input(name=name, value=value, type=self.type, **attrs)
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                  for value in values]
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        return u'\n'.join(inputs)
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class TextInput(Input):
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    type = 'text'
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class PasswordInput(Input):
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    type = 'password'
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    def render(self, form, field):
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        self.add_media(form)
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        name, values, attrs = self._render_attrs(form, field)
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        assert len(values) == 1
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        id = attrs.pop('id')
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        confirmname = '%s-confirm:%s' % tuple(name.rsplit(':', 1))
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        inputs = [tags.input(name=name, value=values[0], type=self.type, id=id, **attrs),
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                  '<br/>',
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                  tags.input(name=confirmname, type=self.type, **attrs),
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                  '&nbsp;', tags.span(form.req._('confirm password'),
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                                      **{'class': 'emphasis'})]
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        return u'\n'.join(inputs)
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class FileInput(Input):
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    type = 'file'
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    def _render_attrs(self, form, field):
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        # ignore value which makes no sense here (XXX even on form validation error?)
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        name, values, attrs = super(FileInput, self)._render_attrs(form, field)
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        return name, ('',), attrs
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class HiddenInput(Input):
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    type = 'hidden'
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    setdomid = False # by default, don't set id attribute on hidden input
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    settabindex = False
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class ButtonInput(Input):
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    type = 'button'
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class TextArea(FieldWidget):
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    def render(self, form, field):
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        name, values, attrs = self._render_attrs(form, field)
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        attrs.setdefault('onkeypress', 'autogrow(this)')
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        if not values:
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            value = u''
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        elif len(values) == 1:
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            value = values[0]
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        else:
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            raise ValueError('a textarea is not supposed to be multivalued')
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        return tags.textarea(value, name=name, **attrs)
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class FCKEditor(TextArea):
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    def __init__(self, *args, **kwargs):
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        super(FCKEditor, self).__init__(*args, **kwargs)
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        self.attrs['cubicweb:type'] = 'wysiwyg'
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    def render(self, form, field):
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        form.req.fckeditor_config()
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        return super(FCKEditor, self).render(form, field)
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class Select(FieldWidget):
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    def __init__(self, attrs=None, multiple=False):
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        super(Select, self).__init__(attrs)
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        self.multiple = multiple
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    def render(self, form, field):
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        name, curvalues, attrs = self._render_attrs(form, field)
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        options = []
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        for label, value in field.vocabulary(form):
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            if value in curvalues:
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                options.append(tags.option(label, value=value, selected='selected'))
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            else:
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                options.append(tags.option(label, value=value))
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        return tags.select(name=name, multiple=self.multiple,
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                           options=options, **attrs)
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class CheckBox(Input):
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    type = 'checkbox'
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    def render(self, form, field):
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        name, curvalues, attrs = self._render_attrs(form, field)
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        options = []
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        for label, value in field.vocabulary(form):
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            if value in curvalues:
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                tag = tags.input(name=name, value=value, type=self.type,
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                                 checked='checked', **attrs)
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            else:
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                tag = tags.input(name=name, value=value, type=self.type,
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                                 **attrs)
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            options.append(tag + label)
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        return '<br/>\n'.join(options)
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class Radio(Input):
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    type = 'radio'
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    setdomid = False
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    def render(self, form, field):
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        name, curvalues, attrs = self._render_attrs(form, field)
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        options = []
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        for label, value in field.vocabulary(form):
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            if value in curvalues:
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                options.append(tags.input(name=name, type=self.type, value=value, checked='checked', **attrs))
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            else:
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                options.append(tags.option(name=name, type=self.type, value=value, **attrs))
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            options[-1] += label + '<br/>'
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        return '\n'.join(options)
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class DateTimePicker(TextInput):
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    monthnames = ('january', 'february', 'march', 'april',
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                  'may', 'june', 'july', 'august',
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                  'september', 'october', 'november', 'december')
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    daynames = ('monday', 'tuesday', 'wednesday', 'thursday',
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                'friday', 'saturday', 'sunday')
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    needs_js = ('cubicweb.ajax.js', 'cubicweb.calendar.js')
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    needs_css = ('cubicweb.calendar_popup.css',)
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    @classmethod
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    def add_localized_infos(cls, req):
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        """inserts JS variables defining localized months and days"""
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        # import here to avoid dependancy from cubicweb-common to simplejson
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        _ = req._
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        monthnames = [_(mname) for mname in cls.monthnames]
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        daynames = [_(dname) for dname in cls.daynames]
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        req.html_headers.define_var('MONTHNAMES', monthnames)
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        req.html_headers.define_var('DAYNAMES', daynames)
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    def render(self, form, field):
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        txtwidget = super(DateTimePicker, self).render(form, field)
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        self.add_localized_infos(form.req)
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        cal_button = self._render_calendar_popup(form, field)
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        return txtwidget + cal_button
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    def _render_calendar_popup(self, form, field):
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        req = form.req
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        value = form.context[field]['rawvalue']
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        inputid = form.context[field]['id']
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        helperid = '%shelper' % inputid
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        if not value:
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            value = date.today()
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        year, month = value.year, value.month
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        return (u"""<a onclick="toggleCalendar('%s', '%s', %s, %s);" class="calhelper">
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<img src="%s" title="%s" alt="" /></a><div class="calpopup hidden" id="%s"></div>"""
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                % (helperid, inputid, year, month,
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                   req.external_resource('CALENDAR_ICON'),
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                   req._('calendar'), helperid) )
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class AjaxWidget(FieldWidget):
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    def __init__(self, wdgtype, inputid=None, **kwargs):
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        super(AjaxWidget, self).__init__(**kwargs)
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        self.attrs.setdefault('class', 'widget')
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        self.attrs.setdefault('cubicweb:loadtype', 'auto')
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        self.attrs['cubicweb:wdgtype'] = wdgtype
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        if inputid is not None:
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            self.attrs['cubicweb:inputid'] = inputid
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    def render(self, form, field):
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        self.add_media(form)
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        attrs = self._render_attrs(form, field)[-1]
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        return tags.div(**attrs)
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# XXX backport PropertyKeyWidget and PropertyValueWidget