"""widget classes for form construction
:organization: Logilab
:copyright: 2009-2010 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 logilab.mtconverter import xml_escape
from logilab.common.deprecation import deprecated
from logilab.common.date import todatetime
from cubicweb import tags, uilib
from cubicweb.web import stdmsgs, INTERNAL_FIELD_VALUE, ProcessFormError
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
# to ease usage as a sub-widgets (eg widget used by another widget)
suffix = None
# does this widget expect a vocabulary
vocabulary_widget = False
def __init__(self, attrs=None, setdomid=None, settabindex=None, suffix=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
if suffix is not None:
self.suffix = suffix
def add_media(self, form):
"""adds media (CSS & JS) required by this widget"""
if self.needs_js:
form._cw.add_js(self.needs_js)
if self.needs_css:
form._cw.add_css(self.needs_css)
def render(self, form, field, renderer=None):
self.add_media(form)
return self._render(form, field, renderer)
def _render(self, form, field, renderer):
raise NotImplementedError()
def format_value(self, form, field, value):
return field.format_value(form._cw, value)
def values_and_attributes(self, form, field):
"""found field's *string* value in:
1. previously submitted form values if any (eg on validation error)
2. req.form
3. extra form values given to render()
4. field's typed value
values found in 1. and 2. are expected te be already some 'display'
value while those found in 3. and 4. are expected to be correctly typed.
3 and 4 are handle by the .typed_value(form, field) method
"""
attrs = dict(self.attrs)
if self.setdomid:
attrs['id'] = field.dom_id(form, self.suffix)
if self.settabindex and not 'tabindex' in attrs:
attrs['tabindex'] = form._cw.next_tabindex()
return self.values(form, field), attrs
def values(self, form, field):
values = None
if not field.ignore_req_params:
qname = field.input_name(form, self.suffix)
# value from a previous post that has raised a validation error
if qname in form.form_previous_values:
values = form.form_previous_values[qname]
# value specified using form parameters
elif qname in form._cw.form:
values = form._cw.form[qname]
elif field.name != qname and field.name in form._cw.form:
# XXX compat: accept attr=value in req.form to specify value of
# attr-subject
values = form._cw.form[field.name]
if values is None:
values = self.typed_value(form, field)
if values != INTERNAL_FIELD_VALUE:
values = self.format_value(form, field, values)
if not isinstance(values, (tuple, list)):
values = (values,)
return values
def typed_value(self, form, field):
"""return field's *typed* value specified in:
3. extra form values given to render()
4. field's typed value
"""
qname = field.input_name(form)
for key in ((field, form), qname):
try:
return form.formvalues[key]
except KeyError:
continue
if field.name != qname and field.name in form.formvalues:
return form.formvalues[field.name]
return field.typed_value(form)
def process_field_data(self, form, field):
posted = form._cw.form
val = posted.get(field.input_name(form, self.suffix))
if isinstance(val, basestring):
val = val.strip()
return val
@deprecated('[3.6] use values_and_attributes')
def _render_attrs(self, form, field):
"""return html tag name, attributes and a list of values for the field
"""
values, attrs = self.values_and_attributes(form, field)
return field.input_name(form, self.suffix), 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
"""
values, attrs = self.values_and_attributes(form, field)
# ensure something is rendered
if not values:
values = (INTERNAL_FIELD_VALUE,)
inputs = [tags.input(name=field.input_name(form, self.suffix),
type=self.type, value=value, **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):
assert self.suffix is None, 'suffix not supported'
values, attrs = self.values_and_attributes(form, field)
assert len(values) == 1
domid = attrs.pop('id')
inputs = [tags.input(name=field.input_name(form),
value=values[0], type=self.type, id=domid, **attrs),
'<br/>',
tags.input(name=field.input_name(form, '-confirm'),
value=values[0], type=self.type, **attrs),
' ', tags.span(form._cw._('confirm password'),
**{'class': 'emphasis'})]
return u'\n'.join(inputs)
def process_field_data(self, form, field):
passwd1 = super(PasswordInput, self).process_field_data(form, field)
passwd2 = form._cw.form.get(field.input_name(form, '-confirm'))
if passwd1 == passwd2:
if passwd1 is None:
return None
return passwd1.encode('utf-8')
raise ProcessFormError(form._cw._("password and confirmation don't match"))
class PasswordSingleInput(Input):
"""<input type='password'> without a confirmation field"""
type = 'password'
def process_field_data(self, form, field):
value = super(PasswordSingleInput, self).process_field_data(form, field)
if value is not None:
return value.encode('utf-8')
return value
class FileInput(Input):
"""<input type='file'>"""
type = 'file'
def values_and_attributes(self, form, field):
# ignore value which makes no sense here (XXX even on form validation error?)
values, attrs = super(FileInput, self).values_and_attributes(form, field)
return ('',), 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):
values, attrs = self.values_and_attributes(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=field.input_name(form, self.suffix),
**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._cw.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):
curvalues, attrs = self.values_and_attributes(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=field.input_name(form, self.suffix),
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):
curvalues, attrs = self.values_and_attributes(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=field.input_name(form, self.suffix),
type=self.type, value=value, **iattrs)
options.append(u'%s %s' % (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._cw._('from_interval_start'),
actual_fields[0].render(form, renderer),
form._cw._('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.subfields(form)]
else:
fields = [f.render(form, renderer) for f in field.subfields(form)]
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 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._cw)
cal_button = self._render_calendar_popup(form, field)
return txtwidget + cal_button
def _render_calendar_popup(self, form, field):
value = field.typed_value(form)
if not value:
value = date.today()
inputid = field.dom_id(form)
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._cw.external_resource('CALENDAR_ICON'),
form._cw._('calendar'), helperid) )
class JQueryDatePicker(FieldWidget):
"""use jquery.ui.datepicker to define a date time picker"""
needs_js = ('jquery.ui.js', )
needs_css = ('jquery.ui.css',)
def __init__(self, datestr=None, **kwargs):
super(JQueryDatePicker, self).__init__(**kwargs)
self.datestr = datestr
def _render(self, form, field, renderer):
req = form._cw
domid = field.dom_id(form, self.suffix)
# XXX find a way to understand every format
fmt = req.property_value('ui.date-format')
fmt = fmt.replace('%Y', 'yy').replace('%m', 'mm').replace('%d', 'dd')
req.add_onload(u'jqNode("%s").datepicker('
'{buttonImage: "%s", dateFormat: "%s", firstDay: 1,'
' showOn: "button", buttonImageOnly: true})' % (
domid, req.external_resource('CALENDAR_ICON'), fmt))
if self.datestr is None:
value = self.values(form, field)[0]
else:
value = self.datestr
return tags.input(id=domid, name=domid, value=value,
type='text', size='10')
class JQueryTimePicker(FieldWidget):
"""use jquery.timePicker.js to define a js time picker"""
needs_js = ('jquery.timePicker.js',)
needs_css = ('jquery.timepicker.css',)
def __init__(self, timestr=None, timesteps=30, **kwargs):
super(JQueryTimePicker, self).__init__(**kwargs)
self.timestr = timestr
self.timesteps = timesteps
def _render(self, form, field, renderer):
req = form._cw
domid = field.dom_id(form, self.suffix)
req.add_onload(u'jqNode("%s").timePicker({selectedTime: "%s", step: %s})' % (
domid, self.timestr, self.timesteps))
if self.timestr is None:
value = self.values(form, field)[0]
else:
value = self.timestr
return tags.input(id=domid, name=domid, value=value,
type='text', size='5')
class JQueryDateTimePicker(FieldWidget):
def __init__(self, initialtime=None, timesteps=15, **kwargs):
super(JQueryDateTimePicker, self).__init__(**kwargs)
self.initialtime = initialtime
self.timesteps = timesteps
def _render(self, form, field, renderer):
"""render the widget for the given `field` of `form`.
Generate one <input> tag for each field's value
"""
req = form._cw
dateqname = field.input_name(form, 'date')
timeqname = field.input_name(form, 'time')
if dateqname in form.form_previous_values:
datestr = form.form_previous_values[dateqname]
timestr = form.form_previous_values[timeqname]
else:
datestr = timestr = u''
if field.name in req.form:
value = req.parse_datetime(req.form[field.name])
else:
value = self.typed_value(form, field)
if value:
datestr = req.format_date(value)
timestr = req.format_time(value)
elif self.initialtime:
timestr = req.format_time(self.initialtime)
datepicker = JQueryDatePicker(datestr=datestr, suffix='date')
timepicker = JQueryTimePicker(timestr=timestr, timesteps=self.timesteps,
suffix='time')
return u'<div id="%s">%s%s</div>' % (field.dom_id(form),
datepicker.render(form, field),
timepicker.render(form, field))
def process_field_data(self, form, field):
req = form._cw
datestr = req.form.get(field.input_name(form, 'date')).strip() or None
timestr = req.form.get(field.input_name(form, 'time')).strip() or None
if datestr is None:
return None
date = todatetime(req.parse_datetime(datestr, 'Date'))
if timestr is None:
return date
time = req.parse_datetime(timestr, 'Time')
return date.replace(hour=time.hour, minute=time.minute, second=time.second)
# ajax widgets ################################################################
def init_ajax_attributes(attrs, wdgtype, loadtype=u'auto'):
try:
attrs['class'] += u' widget'
except KeyError:
attrs['class'] = 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):
attrs = self.values_and_attributes(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 values_and_attributes(self, form, field):
values, attrs = super(AutoCompletionWidget, self).values_and_attributes(form, field)
init_ajax_attributes(attrs, self.wdgtype, self.loadtype)
# XXX entity form specific
attrs['cubicweb:dataurl'] = self._get_url(form.edited_entity, field)
if not values:
values = ('',)
return 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._cw.build_url('json', fname=fname, mode='remote',
pageid=entity._cw.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._cw.datadir_url + fname
class RestrictedAutoCompletionWidget(AutoCompletionWidget):
"""XXX describe me"""
wdgtype = 'RestrictedSuggestField'
class AddComboBoxWidget(Select):
def values_and_attributes(self, form, field):
values, attrs = super(AddComboBoxWidget, self).values_and_attributes(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.subjrels[field.name].objects(entity.e_schema)[0]
attrs['cubicweb:etype_from'] = etype_from
return values, attrs
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)
if isinstance(label, tuple):
self.label = label[0]
self.icon = label[1]
else:
self.label = label
self.icon = None
self.name = name
self.value = ''
self.onclick = onclick
self.cwaction = cwaction
self.attrs.setdefault('class', 'validateButton')
def render(self, form, field=None, renderer=None):
label = form._cw._(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'] = self.name
if self.setdomid:
attrs['id'] = self.name
if self.settabindex and not 'tabindex' in attrs:
attrs['tabindex'] = form._cw.next_tabindex()
if self.icon:
img = tags.img(src=form._cw.external_resource(self.icon), alt=self.icon)
else:
img = u''
return tags.button(img + xml_escape(label), escapecontent=False,
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._cw._(self.label)
imgsrc = form._cw.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}
# more widgets #################################################################
class EditableURLWidget(FieldWidget):
"""custom widget to edit separatly an url path / query string (used by
default for Bookmark.path for instance), dealing with url quoting nicely
(eg user edit the unquoted value).
"""
def _render(self, form, field, renderer):
"""render the widget for the given `field` of `form`.
Generate one <input> tag for each field's value
"""
assert self.suffix is None, 'not supported'
req = form._cw
pathqname = field.input_name(form, 'path')
fqsqname = field.input_name(form, 'fqs') # formatted query string
if pathqname in form.form_previous_values:
path = form.form_previous_values[pathqname]
fqs = form.form_previous_values[fqsqname]
else:
if field.name in req.form:
value = req.form[field.name]
else:
value = self.typed_value(form, field)
if value:
try:
path, qs = value.split('?', 1)
except ValueError:
path = value
qs = ''
else:
path = qs = ''
fqs = u'\n'.join(u'%s=%s' % (k, v) for k, v in req.url_parse_qsl(qs))
attrs = dict(self.attrs)
if self.setdomid:
attrs['id'] = field.dom_id(form)
if self.settabindex and not 'tabindex' in attrs:
attrs['tabindex'] = req.next_tabindex()
# ensure something is rendered
inputs = [u'<table><tr><th>',
req._('i18n_bookmark_url_path'),
u'</th><td>',
tags.input(name=pathqname, type='string', value=path, **attrs),
u'</td></tr><tr><th>',
req._('i18n_bookmark_url_fqs'),
u'</th><td>']
if self.setdomid:
attrs['id'] = field.dom_id(form, 'fqs')
if self.settabindex:
attrs['tabindex'] = req.next_tabindex()
attrs.setdefault('onkeyup', 'autogrow(this)')
inputs += [tags.textarea(fqs, name=fqsqname, **attrs),
u'</td></tr></table>']
# surrounding div necessary for proper error localization
return u'<div id="%s">%s</div>' % (
field.dom_id(form), u'\n'.join(inputs))
def process_field_data(self, form, field):
req = form._cw
values = {}
path = req.form.get(field.input_name(form, 'path'))
if isinstance(path, basestring):
path = path.strip() or None
fqs = req.form.get(field.input_name(form, 'fqs'))
if isinstance(fqs, basestring):
fqs = fqs.strip() or None
if fqs:
for i, line in enumerate(fqs.split('\n')):
line = line.strip()
if line:
try:
key, val = line.split('=', 1)
except ValueError:
raise ProcessFormError(req._("wrong query parameter line %s") % (i+1))
# value will be url quoted by build_url_params
values.setdefault(key.encode(req.encoding), []).append(val)
if not values:
return path
return u'%s?%s' % (path, req.build_url_params(**values))