# Python Imports
import new

import django.newforms as forms
from django.db.models.fields import DecimalField

decimal_delimiter=","

class CustomInput(forms.widgets.TextInput):
    def render(self, name, value, attrs=None):
        if value and not isinstance(value, basestring):
            value=self.dbfield.format_number(value).replace(".", decimal_delimiter)
        return forms.widgets.TextInput.render(self, name, value, attrs=attrs)
        
class I18NDecimalHTMLField(forms.DecimalField):
    def __init__(self, *args, **kwargs):
        self.widget = CustomInput()
        self.widget.dbfield=self.dbfield
        forms.DecimalField.__init__(self, *args, **kwargs)
        
    def clean(self, value):
        if not self.required and value in forms.fields.EMPTY_VALUES:
            return None
        value = value.strip()
        value=value.replace(decimal_delimiter, ".")
        return forms.DecimalField.clean(self, value)

class I18NDecimalField(DecimalField):
    def formfield(self, **kwargs):

        # You can only pass a form.Field class. That's why I
        # create a new class here.
        form_class=new.classobj("I18NDecimalHTMLField-%d" % self.decimal_places,
                                (I18NDecimalHTMLField,), globals())
        form_class.dbfield=self
        defaults = {
            'max_digits': self.max_digits,
            'decimal_places': self.decimal_places,
            'form_class': form_class
        }
        defaults.update(kwargs)
        return super(DecimalField, self).formfield(**defaults)

    def get_internal_type(self):
        return 'DecimalField'