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newforms: Cleaned up some un-DRYness by adding Widget.build_attrs(). Also slightly changed flatatt to include a leading space, so the spaces don't have to be hard-coded each time you embed flatatt() results in HTML. Thanks, SmileyChris. Refs #3023 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4071 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2006-11-15 20:16:04 +00:00
parent cdec3d85e2
commit 5a597d3bbb
1 changed files with 19 additions and 23 deletions
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42
django/newforms/widgets.py
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@ -16,9 +16,9 @@ try:
except NameError:
from sets import Set as set # Python 2.3 fallback
# Converts a dictionary to a single string with key="value", XML-style.
# Assumes keys do not need to be XML-escaped.
flatatt = lambda attrs: ' '.join(['%s="%s"' % (k, escape(v)) for k, v in attrs.items()])
# Converts a dictionary to a single string with key="value", XML-style with
# a leading space. Assumes keys do not need to be XML-escaped.
flatatt = lambda attrs: ''.join([' %s="%s"' % (k, escape(v)) for k, v in attrs.items()])
class Widget(object):
requires_data_list = False # Determines whether render()'s 'value' argument should be a list.
@ -28,16 +28,20 @@ class Widget(object):
def render(self, name, value):
raise NotImplementedError
def build_attrs(self, extra_attrs=None, **kwargs):
attrs = dict(self.attrs, **kwargs)
if extra_attrs:
attrs.update(extra_attrs)
return attrs
class Input(Widget):
"Base class for all <input> widgets (except type='checkbox', which is special)"
input_type = None # Subclasses must define this.
def render(self, name, value, attrs=None):
if value is None: value = ''
final_attrs = dict(self.attrs, type=self.input_type, name=name)
if attrs:
final_attrs.update(attrs)
final_attrs = self.build_attrs(attrs, type=self.input_type, name=name)
if value != '': final_attrs['value'] = value # Only add the 'value' attribute if a value is non-empty.
return u'<input %s />' % flatatt(final_attrs)
return u'<input%s />' % flatatt(final_attrs)
class TextInput(Input):
input_type = 'text'
@ -54,18 +58,14 @@ class FileInput(Input):
class Textarea(Widget):
def render(self, name, value, attrs=None):
if value is None: value = ''
final_attrs = dict(self.attrs, name=name)
if attrs:
final_attrs.update(attrs)
return u'<textarea %s>%s</textarea>' % (flatatt(final_attrs), escape(value))
final_attrs = self.build_attrs(attrs, name=name)
return u'<textarea%s>%s</textarea>' % (flatatt(final_attrs), escape(value))
class CheckboxInput(Widget):
def render(self, name, value, attrs=None):
final_attrs = dict(self.attrs, type='checkbox', name=name)
if attrs:
final_attrs.update(attrs)
final_attrs = self.build_attrs(attrs, type='checkbox', name=name)
if value: final_attrs['checked'] = 'checked'
return u'<input %s />' % flatatt(final_attrs)
return u'<input%s />' % flatatt(final_attrs)
class Select(Widget):
def __init__(self, attrs=None, choices=()):
@ -75,10 +75,8 @@ class Select(Widget):
def render(self, name, value, attrs=None, choices=()):
if value is None: value = ''
final_attrs = dict(self.attrs, name=name)
if attrs:
final_attrs.update(attrs)
output = [u'<select %s>' % flatatt(final_attrs)]
final_attrs = self.build_attrs(attrs, name=name)
output = [u'<select%s>' % flatatt(final_attrs)]
str_value = str(value) # Normalize to string.
for option_value, option_label in chain(self.choices, choices):
selected_html = (str(option_value) == str_value) and ' selected="selected"' or ''
@ -95,10 +93,8 @@ class SelectMultiple(Widget):
def render(self, name, value, attrs=None, choices=()):
if value is None: value = []
final_attrs = dict(self.attrs, name=name)
if attrs:
final_attrs.update(attrs)
output = [u'<select multiple="multiple" %s>' % flatatt(final_attrs)]
final_attrs = self.build_attrs(attrs, name=name)
output = [u'<select multiple="multiple"%s>' % flatatt(final_attrs)]
str_values = set([str(v) for v in value]) # Normalize to strings.
for option_value, option_label in chain(self.choices, choices):
selected_html = (str(option_value) in str_values) and ' selected="selected"' or ''