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#
# djblets_forms.py -- Form-related template tags
#
# Copyright (c) 2008 Christian Hammond
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
from django import template
from django.forms import BooleanField
register = template.Library()
@register.simple_tag
def label_tag(field):
"""
Outputs the tag for a field's label. This gives more fine-grained
control over the appearance of the form.
This exists because a template can't access this directly from a field
in newforms.
"""
is_checkbox = is_field_checkbox(field)
s = '<label for="%s"' % form_field_id(field)
classes = []
if field.field.required:
classes.append("required")
if is_checkbox:
classes.append("vCheckboxLabel")
if classes:
s += ' class="%s"' % " ".join(classes)
s += '>%s' % field.label
if not is_checkbox:
s += ':'
s += '</label>'
return s
@register.filter
def form_field_id(field):
"""
Outputs the ID of a field.
"""
widget = field.field.widget
id_ = widget.attrs.get('id') or field.auto_id
if id_:
return widget.id_for_label(id_)
return ""
@register.filter
def is_field_checkbox(field):
"""
Returns whether or not this field is a checkbox (a ```BooleanField''').
"""
return isinstance(field.field, BooleanField)
@register.filter
def form_field_has_label_first(field):
"""
Returns whether or not this field should display the label before the
widget. This is the case in all fields except checkboxes.
"""
return not is_field_checkbox(field)
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