# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb. If not, see <http://www.gnu.org/licenses/>.
"""
Renderers
---------
.. Note::
Form renderers are responsible to layout a form to HTML.
Here are the base renderers available:
.. autoclass:: cubicweb.web.views.formrenderers.FormRenderer
.. autoclass:: cubicweb.web.views.formrenderers.HTableFormRenderer
.. autoclass:: cubicweb.web.views.formrenderers.EntityCompositeFormRenderer
.. autoclass:: cubicweb.web.views.formrenderers.EntityFormRenderer
.. autoclass:: cubicweb.web.views.formrenderers.EntityInlinedFormRenderer
"""
__docformat__ = "restructuredtext en"
from warnings import warn
from logilab.common import dictattr
from logilab.mtconverter import xml_escape
from cubicweb import tags
from cubicweb.appobject import AppObject
from cubicweb.selectors import is_instance, yes
from cubicweb.utils import json_dumps, support_args
from cubicweb.web import eid_param, formwidgets as fwdgs
def checkbox(name, value, attrs='', checked=None):
if checked is None:
checked = value
checked = checked and 'checked="checked"' or ''
return u'<input type="checkbox" name="%s" value="%s" %s %s />' % (
name, value, checked, attrs)
def field_label(form, field):
if callable(field.label):
return field.label(form, field)
# XXX with 3.6 we can now properly rely on 'if field.role is not None' and
# stop having a tuple for label
if isinstance(field.label, tuple): # i.e. needs contextual translation
return form._cw.pgettext(*field.label)
return form._cw._(field.label)
class FormRenderer(AppObject):
"""This is the 'default' renderer, displaying fields in a two columns table:
+--------------+--------------+
| field1 label | field1 input |
+--------------+--------------+
| field2 label | field2 input |
+--------------+--------------+
+---------+
| buttons |
+---------+
"""
__registry__ = 'formrenderers'
__regid__ = 'default'
_options = ('display_label', 'display_help',
'display_progress_div', 'table_class', 'button_bar_class',
# add entity since it may be given to select the renderer
'entity')
display_label = True
display_help = True
display_progress_div = True
table_class = u'attributeForm'
button_bar_class = u'formButtonBar'
def __init__(self, req=None, rset=None, row=None, col=None, **kwargs):
super(FormRenderer, self).__init__(req, rset=rset, row=row, col=col)
if self._set_options(kwargs):
raise ValueError('unconsumed arguments %s' % kwargs)
def _set_options(self, kwargs):
for key in self._options:
try:
setattr(self, key, kwargs.pop(key))
except KeyError:
continue
return kwargs
# renderer interface ######################################################
def render(self, form, values):
self._set_options(values)
form.add_media()
data = []
w = data.append
w(self.open_form(form, values))
if self.display_progress_div:
w(u'<div id="progress">%s</div>' % self._cw._('validating...'))
w(u'<fieldset>')
self.render_fields(w, form, values)
self.render_buttons(w, form)
w(u'</fieldset>')
w(self.close_form(form, values))
errormsg = self.error_message(form)
if errormsg:
data.insert(0, errormsg)
return '\n'.join(data)
def render_label(self, form, field):
if field.label is None:
return u''
label = field_label(form, field)
attrs = {'for': field.dom_id(form)}
if field.required:
attrs['class'] = 'required'
return tags.label(label, **attrs)
def render_help(self, form, field):
help = []
descr = field.help
if callable(descr):
if support_args(descr, 'form', 'field'):
descr = descr(form, field)
else:
warn("[3.10] field's help callback must now take form and field as argument",
DeprecationWarning)
descr = descr(form)
if descr:
help.append('<div class="helper">%s</div>' % self._cw._(descr))
example = field.example_format(self._cw)
if example:
help.append('<div class="helper">(%s: %s)</div>'
% (self._cw._('sample format'), example))
return u' '.join(help)
# specific methods (mostly to ease overriding) #############################
def error_message(self, form):
"""return formatted error message
This method should be called once inlined field errors has been consumed
"""
req = self._cw
errex = form.form_valerror
# get extra errors
if errex is not None:
errormsg = req._('please correct the following errors:')
errors = form.remaining_errors()
if errors:
if len(errors) > 1:
templstr = u'<li>%s</li>\n'
else:
templstr = u' %s\n'
for field, err in errors:
if field is None:
errormsg += templstr % err
else:
errormsg += templstr % '%s: %s' % (req._(field), err)
if len(errors) > 1:
errormsg = '<ul>%s</ul>' % errormsg
return u'<div class="errorMessage">%s</div>' % errormsg
return u''
def open_form(self, form, values):
if form.needs_multipart:
enctype = 'multipart/form-data'
else:
enctype = 'application/x-www-form-urlencoded'
tag = ('<form action="%s" method="post" enctype="%s"' % (
xml_escape(form.form_action() or '#'), enctype))
if form.domid:
tag += ' id="%s"' % form.domid
if form.onsubmit:
tag += ' onsubmit="%s"' % xml_escape(form.onsubmit % dictattr(form))
if form.cssstyle:
tag += ' style="%s"' % xml_escape(form.cssstyle)
if form.cssclass:
tag += ' class="%s"' % xml_escape(form.cssclass)
if form.cwtarget:
tag += ' cubicweb:target="%s"' % xml_escape(form.cwtarget)
return tag + '>'
def close_form(self, form, values):
"""seems dumb but important for consistency w/ close form, and necessary
for form renderers overriding open_form to use something else or more than
and <form>
"""
return '</form>'
def render_fields(self, w, form, values):
fields = self._render_hidden_fields(w, form)
if fields:
self._render_fields(fields, w, form)
self.render_child_forms(w, form, values)
def render_child_forms(self, w, form, values):
# render
for childform in getattr(form, 'forms', []):
self.render_fields(w, childform, values)
def _render_hidden_fields(self, w, form):
fields = form.fields[:]
for field in form.fields:
if not field.is_visible():
w(field.render(form, self))
fields.remove(field)
return fields
def _render_fields(self, fields, w, form):
byfieldset = {}
for field in fields:
byfieldset.setdefault(field.fieldset, []).append(field)
if form.fieldsets_in_order:
fieldsets = form.fieldsets_in_order
else:
fieldsets = byfieldset.keys()
for fieldset in fieldsets:
try:
fields = byfieldset.pop(fieldset)
except KeyError:
self.warning('no such fieldset: %s (%s)', fieldset, form)
continue
w(u'<fieldset class="%s">' % (fieldset or u'default'))
if fieldset:
w(u'<legend>%s</legend>' % self._cw._(fieldset))
w(u'<table class="%s">' % self.table_class)
for field in fields:
w(u'<tr class="%s_%s_row">' % (field.name, field.role))
if self.display_label and field.label is not None:
w(u'<th class="labelCol">%s</th>' % self.render_label(form, field))
w('<td')
if field.label is None:
w(' colspan="2"')
error = form.field_error(field)
if error:
w(u' class="error"')
w(u'>')
w(field.render(form, self))
if error:
self.render_error(w, error)
if self.display_help:
w(self.render_help(form, field))
w(u'</td></tr>')
w(u'</table></fieldset>')
if byfieldset:
self.warning('unused fieldsets: %s', ', '.join(byfieldset))
def render_buttons(self, w, form):
if not form.form_buttons:
return
w(u'<table class="%s">\n<tr>\n' % self.button_bar_class)
for button in form.form_buttons:
w(u'<td>%s</td>\n' % button.render(form))
w(u'</tr></table>')
def render_error(self, w, err):
"""return validation error for widget's field, if any"""
w(u'<span class="errorMsg">%s</span>' % err)
class BaseFormRenderer(FormRenderer):
"""use form_renderer_id = 'base' if you want base FormRenderer layout even
when selected for an entity
"""
__regid__ = 'base'
class HTableFormRenderer(FormRenderer):
"""The 'htable' form renderer display fields horizontally in a table:
+--------------+--------------+---------+
| field1 label | field2 label | |
+--------------+--------------+---------+
| field1 input | field2 input | buttons |
+--------------+--------------+---------+
"""
__regid__ = 'htable'
display_help = False
def _render_fields(self, fields, w, form):
w(u'<table border="0" class="htableForm">')
w(u'<tr>')
for field in fields:
if self.display_label:
w(u'<th class="labelCol">%s</th>' % self.render_label(form, field))
if self.display_help:
w(self.render_help(form, field))
# empty slot for buttons
w(u'<th class="labelCol"> </th>')
w(u'</tr>')
w(u'<tr>')
for field in fields:
error = form.field_error(field)
if error:
w(u'<td class="error">')
self.render_error(w, error)
else:
w(u'<td>')
w(field.render(form, self))
w(u'</td>')
w(u'<td>')
for button in form.form_buttons:
w(button.render(form))
w(u'</td>')
w(u'</tr>')
w(u'</table>')
def render_buttons(self, w, form):
pass
class EntityCompositeFormRenderer(FormRenderer):
"""This is a specific renderer for the multiple entities edition form
('muledit').
Each entity form will be displayed in row off a table, with a check box for
each entities to indicate which ones are edited. Those checkboxes should be
automatically updated when something is edited.
"""
__regid__ = 'composite'
_main_display_fields = None
def render_fields(self, w, form, values):
if form.parent_form is None:
w(u'<table class="listing">')
# get fields from the first subform with something to display (we
# may have subforms with nothing editable that will simply be
# skipped later)
for subform in form.forms:
subfields = [field for field in subform.fields
if field.is_visible()]
if subfields:
break
if subfields:
# main form, display table headers
w(u'<tr class="header">')
w(u'<th align="left">%s</th>' %
tags.input(type='checkbox',
title=self._cw._('toggle check boxes'),
onclick="setCheckboxesState('eid', null, this.checked)"))
for field in subfields:
w(u'<th>%s</th>' % field_label(form, field))
w(u'</tr>')
super(EntityCompositeFormRenderer, self).render_fields(w, form, values)
if form.parent_form is None:
w(u'</table>')
if self._main_display_fields:
super(EntityCompositeFormRenderer, self)._render_fields(
self._main_display_fields, w, form)
def _render_fields(self, fields, w, form):
if form.parent_form is not None:
entity = form.edited_entity
values = form.form_previous_values
qeid = eid_param('eid', entity.eid)
cbsetstate = "setCheckboxesState('eid', %s, 'checked')" % \
xml_escape(json_dumps(entity.eid))
w(u'<tr class="%s">' % (entity.cw_row % 2 and u'even' or u'odd'))
# XXX turn this into a widget used on the eid field
w(u'<td>%s</td>' % checkbox('eid', entity.eid,
checked=qeid in values))
for field in fields:
error = form.field_error(field)
if error:
w(u'<td class="error">')
self.render_error(w, error)
else:
w(u'<td>')
if isinstance(field.widget, (fwdgs.Select, fwdgs.CheckBox,
fwdgs.Radio)):
field.widget.attrs['onchange'] = cbsetstate
elif isinstance(field.widget, fwdgs.Input):
field.widget.attrs['onkeypress'] = cbsetstate
# XXX else
w(u'<div>%s</div>' % field.render(form, self))
w(u'</td>\n')
w(u'</tr>')
else:
self._main_display_fields = fields
class EntityFormRenderer(BaseFormRenderer):
"""This is the 'default' renderer for entity's form.
You can still use form_renderer_id = 'base' if you want base FormRenderer
layout even when selected for an entity.
"""
__regid__ = 'default'
# needs some additional points in some case (XXX explain cases)
__select__ = is_instance('Any') & yes()
_options = FormRenderer._options + ('main_form_title',)
main_form_title = _('main informations')
def open_form(self, form, values):
attrs_fs_label = ''
if self.main_form_title:
attrs_fs_label += ('<div class="iformTitle"><span>%s</span></div>'
% self._cw._(self.main_form_title))
attrs_fs_label += '<div class="formBody">'
return attrs_fs_label + super(EntityFormRenderer, self).open_form(form, values)
def close_form(self, form, values):
"""seems dumb but important for consistency w/ close form, and necessary
for form renderers overriding open_form to use something else or more than
and <form>
"""
return super(EntityFormRenderer, self).close_form(form, values) + '</div>'
def render_buttons(self, w, form):
if len(form.form_buttons) == 3:
w("""<table width="100%%">
<tbody>
<tr><td align="center">
%s
</td><td style="align: right; width: 50%%;">
%s
%s
</td></tr>
</tbody>
</table>""" % tuple(button.render(form) for button in form.form_buttons))
else:
super(EntityFormRenderer, self).render_buttons(w, form)
class EntityInlinedFormRenderer(EntityFormRenderer):
"""This is a specific renderer for entity's form inlined into another
entity's form.
"""
__regid__ = 'inline'
def render(self, form, values):
form.add_media()
data = []
w = data.append
try:
w(u'<div id="div-%(divid)s" onclick="%(divonclick)s">' % values)
except KeyError:
w(u'<div id="div-%(divid)s">' % values)
else:
w(u'<div id="notice-%s" class="notice">%s</div>' % (
values['divid'], self._cw._('click on the box to cancel the deletion')))
w(u'<div class="iformBody">')
eschema = form.edited_entity.e_schema
if values['removejs']:
values['removemsg'] = self._cw._('remove-inlined-entity-form')
w(u'<div class="iformTitle"><span>%(title)s</span> '
'#<span class="icounter">%(counter)s</span> '
'[<a href="javascript: %(removejs)s;noop();">%(removemsg)s</a>]</div>'
% values)
else:
w(u'<div class="iformTitle"><span>%(title)s</span> '
'#<span class="icounter">%(counter)s</span></div>'
% values)
# XXX that stinks
# cleanup values
for key in ('title', 'removejs', 'removemsg'):
values.pop(key, None)
self.render_fields(w, form, values)
w(u'</div></div>')
return '\n'.join(data)
def render_fields(self, w, form, values):
w(u'<fieldset id="fs-%(divid)s">' % values)
fields = self._render_hidden_fields(w, form)
w(u'</fieldset>')
w(u'<fieldset class="subentity">')
if fields:
self._render_fields(fields, w, form)
self.render_child_forms(w, form, values)
w(u'</fieldset>')