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wtforms_utils.py
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wtforms_utils.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2012, 2013 CERN.
##
## Invenio is free software; you can redistribute it and/or
## modify it under the terms of the GNU General Public License as
## published by the Free Software Foundation; either version 2 of the
## License, or (at your option) any later version.
##
## Invenio is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
Extended WTForms field
Classes TimeField, DatePickerWidget, DateTimePickerWidget and TimePickerWidget
are taken from `flask-admin` extension.
:copyright: (c) 2011 by wilsaj.
:license: BSD, see LICENSE for more details.
:source: https://raw.github.com/wilsaj/flask-admin/master/flask_admin/wtforms.py
"""
import datetime
import time
from flask import session
from wtforms import Form as WTForm
from wtforms.widgets import TextInput, HTMLString, html_params
from wtforms.fields import Field, TextField, HiddenField, FileField
from flask.ext.wtf import Form
from wtforms.ext.csrf.session import SessionSecureForm
from wtforms.compat import text_type
from invenio.config import CFG_SITE_SECRET_KEY
class RowWidget(object):
"""
Renders a list of fields as a set of table rows with th/td pairs.
"""
def __init__(self):
pass
def __call__(self, field, **kwargs):
html = []
hidden = ''
for subfield in field:
if subfield.type == 'HiddenField':
hidden += text_type(subfield)
else:
html.append('%s%s' % (hidden, text_type(subfield(class_="span1", placeholder=subfield.label.text))))
hidden = ''
if hidden:
html.append(hidden)
return HTMLString(''.join(html))
class TimeField(Field):
"""A text field which stores a `time.time` matching a format."""
widget = TextInput()
def __init__(self, label=None, validators=None,
format='%H:%M:%S', **kwargs):
super(TimeField, self).__init__(label, validators, **kwargs)
self.format = format
def _value(self):
if self.raw_data:
return u' '.join(self.raw_data)
else:
return self.data and self.data.strftime(self.format) or u''
def process_formdata(self, valuelist):
if valuelist:
time_str = u' '.join(valuelist)
try:
timetuple = time.strptime(time_str, self.format)
self.data = datetime.time(*timetuple[3:6])
except ValueError:
self.data = None
raise
class DatePickerWidget(TextInput):
"""
TextInput widget that adds a 'datepicker' class to the html input
element; this makes it easy to write a jQuery selector that adds a
UI widget for date picking.
"""
def __call__(self, field, **kwargs):
c = kwargs.pop('class', '') or kwargs.pop('class_', '')
kwargs['class'] = u'datepicker %s' % c
return super(DatePickerWidget, self).__call__(field, **kwargs)
class DateTimePickerWidget(TextInput):
"""TextInput widget that adds a 'datetimepicker' class to the html
adds a UI widget for datetime picking.
"""
def __call__(self, field, **kwargs):
c = kwargs.pop('class', '') or kwargs.pop('class_', '')
kwargs['class'] = u'datetimepicker %s' % c
return super(DateTimePickerWidget, self).__call__(field, **kwargs)
class TimePickerWidget(TextInput):
"""TextInput widget that adds a 'timepicker' class to the html
input element; this makes it easy to write a jQuery selector that
adds a UI widget for time picking.
"""
def __call__(self, field, **kwargs):
c = kwargs.pop('class', '') or kwargs.pop('class_', '')
kwargs['class'] = u'timepicker %s' % c
return super(TimePickerWidget, self).__call__(field, **kwargs)
class AutocompleteField(TextField):
def __init__(self, label=None, validators=None, data_provide="typeahead", data_source=None, **kwargs):
super(AutocompleteField, self).__init__(label, validators, **kwargs)
if data_source:
self.widget = TypeheadWidget(data_source, data_provide)
class TypeheadWidget(object):
def __init__(self, autocomplete_list, data_provide):
if callable(autocomplete_list):
self.autocomplete_list = autocomplete_list()
else:
self.autocomplete_list = '["{}"]'.format('","'.join(autocomplete_list))
self.data_provide = data_provide
def __call__(self, field, **kwargs):
kwargs.setdefault('id', field.id)
kwargs.setdefault('type', 'text')
kwargs.setdefault('data-provide', self.data_provide)
kwargs.setdefault('data-source', self.autocomplete_list)
if 'value' not in kwargs:
kwargs['value'] = field._value()
return HTMLString(u'<input %s />' % html_params(name=field.name, **kwargs))
def has_file_field(form):
"""Test whether or not a form has a FileField in it. This is used
to know whether or not we need to set enctype to
multipart/form-data.
"""
for field in form:
if isinstance(field, FileField):
return True
return False
class FilterTextField(TextField):
alias = None
def __init__(self, *args, **kwargs):
self.alias = kwargs.get('alias')
if 'alias' in kwargs:
del kwargs['alias']
super(TextField, self).__init__(*args, **kwargs)
if not self.raw_data:
self.raw_data = []
def _value(self):
if self.raw_data:
return self.raw_data.pop()
return u''
class InvenioForm(WTForm):
@property
def required_field_names(self):
return [field.name for field in self if hasattr(field, 'required')]
class InvenioBaseForm(Form, SessionSecureForm):
SECRET_KEY = CFG_SITE_SECRET_KEY
TIME_LIMIT = datetime.timedelta(minutes=20)
def __init__(self, *args, **kwargs):
super(InvenioBaseForm, self).__init__(*args, csrf_context=session, **kwargs)
def add_fields(self, name, field):
self.__setattr__(name, field)
class FilterForm(InvenioBaseForm):
"""
Filter forms contains hidden fields to keep sorting.
"""
sort_by = HiddenField()
order = HiddenField()

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