1 ### -*- coding: utf-8 -*- ####################################################

     2 ##############################################################################

     3 #

     4 # Copyright (c) 2012 Thierry Florac <tflorac AT ulthar.net>

     5 # All Rights Reserved.

     6 #

     7 # This software is subject to the provisions of the Zope Public License,

     8 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

     9 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

    10 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    11 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

    12 # FOR A PARTICULAR PURPOSE.

    13 #

    14 ##############################################################################

    15 

    16 

    17 # import standard packages

    18 import decimal

    19 import string

    20 

    21 # import Zope3 interfaces

    22 from z3c.form.interfaces import IWidget

    23 from zope.schema.interfaces import ITextLine, IDecimal

    24 

    25 # import local interfaces

    26 

    27 # import Zope3 packages

    28 from z3c.form.converter import BaseDataConverter, FormatterValidationError

    29 from zope.component import adapts

    30 from zope.interface import implements

    31 from zope.schema import TextLine, Decimal

    32 from zope.schema._bootstrapfields import InvalidValue

    33 

    34 # import local packages

    35 

    36 from ztfy.utils import _

    37 

    38 

    39 class StringLine(TextLine):

    40     """String line field"""

    41 

    42     _type = str

    43 

    44     def fromUnicode(self, value):

    45         return str(value)

    46 

    47 

    48 #

    49 # Color field

    50 #

    51 

    52 class IColorField(ITextLine):

    53     """Marker interface for color fields"""

    54 

    55 

    56 class ColorField(TextLine):

    57     """Color field"""

    58 

    59     implements(IColorField)

    60 

    61     def __init__(self, *args, **kw):

    62         super(ColorField, self).__init__(max_length=6, *args, **kw)

    63 

    64     def _validate(self, value):

    65         if len(value) not in (3, 6):

    66             raise InvalidValue, _("Color length must be 3 or 6 characters")

    67         for v in value:

    68             if v not in string.hexdigits:

    69                 raise InvalidValue, _("Color value must contain only valid color codes (numbers or letters between 'A' end 'F')")

    70         super(ColorField, self)._validate(value)

    71 

    72 

    73 #

    74 # Pointed decimal field

    75 #

    76 

    77 class IDottedDecimalField(IDecimal):

    78     """Marker interface for dotted decimal fields"""

    79 

    80 

    81 class DottedDecimalField(Decimal):

    82     """Dotted decimal field"""

    83 

    84     implements(IDottedDecimalField)

    85 

    86 

    87 class DottedDecimalDataConverter(BaseDataConverter):

    88     """Dotted decimal field data converter"""

    89 

    90     adapts(IDottedDecimalField, IWidget)

    91 

    92     errorMessage = _('The entered value is not a valid decimal literal.')

    93 

    94     def __init__(self, field, widget):

    95         super(DottedDecimalDataConverter, self).__init__(field, widget)

    96 

    97     def toWidgetValue(self, value):

    98         if not value:

    99             return self.field.missing_value

   100         return str(value)

   101 

   102     def toFieldValue(self, value):

   103         if value is self.field.missing_value:

   104             return u''

   105         if not value:

   106             return None

   107         try:

   108             return decimal.Decimal(value)

   109         except decimal.InvalidOperation:

   110             raise FormatterValidationError(self.errorMessage, value)