"""widget classes for form construction
:organization: Logilab
:copyright: 2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
__docformat__ = "restructuredtext en"
from datetime import date
from warnings import warn
from cubicweb.common import tags, uilib
from cubicweb.web import stdmsgs, INTERNAL_FIELD_VALUE
class FieldWidget(object):
"""abstract widget class"""
# javascript / css files required by the widget
needs_js = ()
needs_css = ()
# automatically set id and tabindex attributes ?
setdomid = True
settabindex = True
# does this widget expect a vocabulary
vocabulary_widget = False
def __init__(self, attrs=None, setdomid=None, settabindex=None):
if attrs is None:
attrs = {}
self.attrs = attrs
if setdomid is not None:
# override class's default value
self.setdomid = setdomid
if settabindex is not None:
# override class's default value
self.settabindex = settabindex
def add_media(self, form):
"""adds media (CSS & JS) required by this widget"""
if self.needs_js:
form.req.add_js(self.needs_js)
if self.needs_css:
form.req.add_css(self.needs_css)
def render(self, form, field, renderer):
"""render the widget for the given `field` of `form`.
To override in concrete class
"""
raise NotImplementedError
def _render_attrs(self, form, field):
"""return html tag name, attributes and a list of values for the field
"""
name = form.context[field]['name']
values = form.context[field]['value']
if not isinstance(values, (tuple, list)):
values = (values,)
attrs = dict(self.attrs)
if self.setdomid:
attrs['id'] = form.context[field]['id']
if self.settabindex and not 'tabindex' in attrs:
attrs['tabindex'] = form.req.next_tabindex()
return name, values, attrs
class Input(FieldWidget):
"""abstract widget class for <input> tag based widgets"""
type = None
def render(self, form, field, renderer):
"""render the widget for the given `field` of `form`.
Generate one <input> tag for each field's value
"""
self.add_media(form)
name, values, attrs = self._render_attrs(form, field)
# ensure something is rendered
if not values:
values = (INTERNAL_FIELD_VALUE,)
inputs = [tags.input(name=name, value=value, type=self.type, **attrs)
for value in values]
return u'\n'.join(inputs)
# basic html widgets ###########################################################
class TextInput(Input):
"""<input type='text'>"""
type = 'text'
class PasswordInput(Input):
"""<input type='password'> and its confirmation field (using
<field's name>-confirm as name)
"""
type = 'password'
def render(self, form, field, renderer):
self.add_media(form)
name, values, attrs = self._render_attrs(form, field)
assert len(values) == 1
id = attrs.pop('id')
try:
confirmname = '%s-confirm:%s' % tuple(name.rsplit(':', 1))
except TypeError:
confirmname = '%s-confirm' % name
inputs = [tags.input(name=name, value=values[0], type=self.type, id=id,
**attrs),
'<br/>',
tags.input(name=confirmname, value=values[0], type=self.type,
**attrs),
' ', tags.span(form.req._('confirm password'),
**{'class': 'emphasis'})]
return u'\n'.join(inputs)
class PasswordSingleInput(Input):
"""<input type='password'> without a confirmation field"""
type = 'password'
class FileInput(Input):
"""<input type='file'>"""
type = 'file'
def _render_attrs(self, form, field):
# ignore value which makes no sense here (XXX even on form validation error?)
name, values, attrs = super(FileInput, self)._render_attrs(form, field)
return name, ('',), attrs
class HiddenInput(Input):
"""<input type='hidden'>"""
type = 'hidden'
setdomid = False # by default, don't set id attribute on hidden input
settabindex = False
class ButtonInput(Input):
"""<input type='button'>
if you want a global form button, look at the Button, SubmitButton,
ResetButton and ImgButton classes below.
"""
type = 'button'
class TextArea(FieldWidget):
"""<textarea>"""
def render(self, form, field, renderer):
name, values, attrs = self._render_attrs(form, field)
attrs.setdefault('onkeyup', 'autogrow(this)')
if not values:
value = u''
elif len(values) == 1:
value = values[0]
else:
raise ValueError('a textarea is not supposed to be multivalued')
lines = value.splitlines()
linecount = len(lines)
for line in lines:
linecount += len(line) / 80
attrs.setdefault('cols', 80)
attrs.setdefault('rows', min(15, linecount + 2))
return tags.textarea(value, name=name, **attrs)
class FCKEditor(TextArea):
"""FCKEditor enabled <textarea>"""
def __init__(self, *args, **kwargs):
super(FCKEditor, self).__init__(*args, **kwargs)
self.attrs['cubicweb:type'] = 'wysiwyg'
def render(self, form, field, renderer):
form.req.fckeditor_config()
return super(FCKEditor, self).render(form, field, renderer)
class Select(FieldWidget):
"""<select>, for field having a specific vocabulary"""
vocabulary_widget = True
def __init__(self, attrs=None, multiple=False):
super(Select, self).__init__(attrs)
self._multiple = multiple
def render(self, form, field, renderer):
name, curvalues, attrs = self._render_attrs(form, field)
if not 'size' in attrs:
attrs['size'] = self._multiple and '5' or '1'
options = []
optgroup_opened = False
for option in field.vocabulary(form):
try:
label, value, oattrs = option
except ValueError:
label, value = option
oattrs = {}
if value is None:
# handle separator
if optgroup_opened:
options.append(u'</optgroup>')
oattrs.setdefault('label', label or '')
options.append(u'<optgroup %s>' % uilib.sgml_attributes(oattrs))
optgroup_opened = True
elif value in curvalues:
options.append(tags.option(label, value=value,
selected='selected', **oattrs))
else:
options.append(tags.option(label, value=value, **oattrs))
if optgroup_opened:
options.append(u'</optgroup>')
return tags.select(name=name, multiple=self._multiple,
options=options, **attrs)
class CheckBox(Input):
"""<input type='checkbox'>, for field having a specific vocabulary. One
input will be generated for each possible value.
"""
type = 'checkbox'
vocabulary_widget = True
def render(self, form, field, renderer):
name, curvalues, attrs = self._render_attrs(form, field)
domid = attrs.pop('id', None)
sep = attrs.pop('separator', u'<br/>\n')
options = []
for i, option in enumerate(field.vocabulary(form)):
try:
label, value, oattrs = option
except ValueError:
label, value = option
oattrs = {}
iattrs = attrs.copy()
iattrs.update(oattrs)
if i == 0 and domid is not None:
iattrs.setdefault('id', domid)
if value in curvalues:
iattrs['checked'] = u'checked'
tag = tags.input(name=name, type=self.type, value=value, **iattrs)
options.append(tag + label)
return sep.join(options)
class Radio(CheckBox):
"""<input type='radio'>, for field having a specific vocabulary. One
input will be generated for each possible value.
"""
type = 'radio'
# compound widgets #############################################################
class IntervalWidget(FieldWidget):
"""custom widget to display an interval composed by 2 fields. This widget
is expected to be used with a CompoundField containing the two actual
fields.
Exemple usage::
from uicfg import autoform_field, autoform_section
autoform_field.tag_attribute(('Concert', 'minprice'),
CompoundField(fields=(IntField(name='minprice'),
IntField(name='maxprice')),
label=_('price'),
widget=IntervalWidget()
))
# we've to hide the other field manually for now
autoform_section.tag_attribute(('Concert', 'maxprice'), 'generated')
"""
def render(self, form, field, renderer):
actual_fields = field.fields
assert len(actual_fields) == 2
return u'<div>%s %s %s %s</div>' % (
form.req._('from_interval_start'),
actual_fields[0].render(form, renderer),
form.req._('to_interval_end'),
actual_fields[1].render(form, renderer),
)
class HorizontalLayoutWidget(FieldWidget):
"""custom widget to display a set of fields grouped together horizontally
in a form. See `IntervalWidget` for example usage.
"""
def render(self, form, field, renderer):
if self.attrs.get('display_label', True):
subst = self.attrs.get('label_input_substitution', '%(label)s %(input)s')
fields = [subst % {'label': renderer.render_label(form, f),
'input': f.render(form, renderer)}
for f in field.fields]
else:
fields = [f.render(form, renderer) for f in field.fields]
return u'<div>%s</div>' % ' '.join(fields)
# javascript widgets ###########################################################
class DateTimePicker(TextInput):
"""<input type='text' + javascript date/time picker for date or datetime
fields
"""
monthnames = ('january', 'february', 'march', 'april',
'may', 'june', 'july', 'august',
'september', 'october', 'november', 'december')
daynames = ('monday', 'tuesday', 'wednesday', 'thursday',
'friday', 'saturday', 'sunday')
needs_js = ('cubicweb.calendar.js',)
needs_css = ('cubicweb.calendar_popup.css',)
@classmethod
def add_localized_infos(cls, req):
"""inserts JS variables defining localized months and days"""
# import here to avoid dependancy from cubicweb-common to simplejson
_ = req._
monthnames = [_(mname) for mname in cls.monthnames]
daynames = [_(dname) for dname in cls.daynames]
req.html_headers.define_var('MONTHNAMES', monthnames)
req.html_headers.define_var('DAYNAMES', daynames)
def render(self, form, field, renderer):
txtwidget = super(DateTimePicker, self).render(form, field, renderer)
self.add_localized_infos(form.req)
cal_button = self._render_calendar_popup(form, field)
return txtwidget + cal_button
def _render_calendar_popup(self, form, field):
value = form.form_field_value(field)
if not value:
value = date.today()
inputid = form.context[field]['id']
helperid = '%shelper' % inputid
year, month = value.year, value.month
return (u"""<a onclick="toggleCalendar('%s', '%s', %s, %s);" class="calhelper">
<img src="%s" title="%s" alt="" /></a><div class="calpopup hidden" id="%s"></div>"""
% (helperid, inputid, year, month,
form.req.external_resource('CALENDAR_ICON'),
form.req._('calendar'), helperid) )
# ajax widgets ################################################################
def init_ajax_attributes(attrs, wdgtype, loadtype=u'auto'):
try:
attrs['klass'] += u' widget'
except KeyError:
attrs['klass'] = u'widget'
attrs.setdefault('cubicweb:wdgtype', wdgtype)
attrs.setdefault('cubicweb:loadtype', loadtype)
class AjaxWidget(FieldWidget):
"""simple <div> based ajax widget"""
def __init__(self, wdgtype, inputid=None, **kwargs):
super(AjaxWidget, self).__init__(**kwargs)
init_ajax_attributes(self.attrs, wdgtype)
if inputid is not None:
self.attrs['cubicweb:inputid'] = inputid
def render(self, form, field, renderer):
self.add_media(form)
attrs = self._render_attrs(form, field)[-1]
return tags.div(**attrs)
class AutoCompletionWidget(TextInput):
"""ajax widget for StringField, proposing matching existing values as you
type.
"""
needs_js = ('cubicweb.widgets.js', 'jquery.autocomplete.js')
needs_css = ('jquery.autocomplete.css',)
wdgtype = 'SuggestField'
loadtype = 'auto'
def __init__(self, *args, **kwargs):
try:
self.autocomplete_initfunc = kwargs.pop('autocomplete_initfunc')
except KeyError:
warn('use autocomplete_initfunc argument of %s constructor '
'instead of relying on autocomplete_initfuncs dictionary on '
'the entity class' % self.__class__.__name__,
DeprecationWarning)
self.autocomplete_initfunc = None
super(AutoCompletionWidget, self).__init__(*args, **kwargs)
def _render_attrs(self, form, field):
name, values, attrs = super(AutoCompletionWidget, self)._render_attrs(form, field)
init_ajax_attributes(attrs, self.wdgtype, self.loadtype)
# XXX entity form specific
attrs['cubicweb:dataurl'] = self._get_url(form.edited_entity, field)
return name, values, attrs
def _get_url(self, entity, field):
if self.autocomplete_initfunc is None:
# XXX for bw compat
fname = entity.autocomplete_initfuncs[field.name]
else:
fname = self.autocomplete_initfunc
return entity.req.build_url('json', fname=fname, mode='remote',
pageid=entity.req.pageid)
class StaticFileAutoCompletionWidget(AutoCompletionWidget):
"""XXX describe me"""
wdgtype = 'StaticFileSuggestField'
def _get_url(self, entity, field):
if self.autocomplete_initfunc is None:
# XXX for bw compat
fname = entity.autocomplete_initfuncs[field.name]
else:
fname = self.autocomplete_initfunc
return entity.req.datadir_url + fname
class RestrictedAutoCompletionWidget(AutoCompletionWidget):
"""XXX describe me"""
wdgtype = 'RestrictedSuggestField'
class AddComboBoxWidget(Select):
def _render_attrs(self, form, field):
name, values, attrs = super(AddComboBoxWidget, self)._render_attrs(form, field)
init_ajax_attributes(self.attrs, 'AddComboBox')
# XXX entity form specific
entity = form.edited_entity
attrs['cubicweb:etype_to'] = entity.e_schema
etype_from = entity.e_schema.subject_relation(self.name).objects(entity.e_schema)[0]
attrs['cubicweb:etype_from'] = etype_from
def render(self, form, field, renderer):
return super(AddComboBoxWidget, self).render(form, field, renderer) + u'''
<div id="newvalue">
<input type="text" id="newopt" />
<a href="javascript:noop()" id="add_newopt"> </a></div>
'''
# buttons ######################################################################
class Button(Input):
"""<input type='button'>, base class for global form buttons
note label is a msgid which will be translated at form generation time, you
should not give an already translated string.
"""
type = 'button'
def __init__(self, label=stdmsgs.BUTTON_OK, attrs=None,
setdomid=None, settabindex=None,
name='', value='', onclick=None, cwaction=None):
super(Button, self).__init__(attrs, setdomid, settabindex)
self.label = label
self.name = name
self.value = ''
self.onclick = onclick
self.cwaction = cwaction
self.attrs.setdefault('klass', 'validateButton')
def render(self, form, field=None, renderer=None):
label = form.req._(self.label)
attrs = self.attrs.copy()
if self.cwaction:
assert self.onclick is None
attrs['onclick'] = "postForm('__action_%s', \'%s\', \'%s\')" % (
self.cwaction, self.label, form.domid)
elif self.onclick:
attrs['onclick'] = self.onclick
if self.name:
attrs['name'] = name
if self.setdomid:
attrs['id'] = self.name
if self.settabindex and not 'tabindex' in attrs:
attrs['tabindex'] = form.req.next_tabindex()
return tags.input(value=label, type=self.type, **attrs)
class SubmitButton(Button):
"""<input type='submit'>, main button to submit a form"""
type = 'submit'
class ResetButton(Button):
"""<input type='reset'>, main button to reset a form.
You usually don't want this.
"""
type = 'reset'
class ImgButton(object):
"""<img> wrapped into a <a> tag with href triggering something (usually a
javascript call)
note label is a msgid which will be translated at form generation time, you
should not give an already translated string.
"""
def __init__(self, domid, href, label, imgressource):
self.domid = domid
self.href = href
self.imgressource = imgressource
self.label = label
def render(self, form, field=None, renderer=None):
label = form.req._(self.label)
imgsrc = form.req.external_resource(self.imgressource)
return '<a id="%(domid)s" href="%(href)s">'\
'<img src="%(imgsrc)s" alt="%(label)s"/>%(label)s</a>' % {
'label': label, 'imgsrc': imgsrc,
'domid': self.domid, 'href': self.href}
# XXX EntityLinkComboBoxWidget, [Raw]DynamicComboBoxWidget