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

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

     3 #

     4 # Copyright (c) 2008-2010 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 __docformat__ = "restructuredtext"

    17 

    18 # import standard packages

    19 

    20 # import Zope3 interfaces

    21 from zope.tales.interfaces import ITALESFunctionNamespace

    22 

    23 # import local interfaces

    24 from ztfy.baseskin.interfaces import IPresentationTarget

    25 from ztfy.baseskin.interfaces.metas import IPageMetasHeaders

    26 from ztfy.baseskin.tal.interfaces import ISkinTalesAPI, IContentMetasAPI

    27 

    28 # import Zope3 packages

    29 from zope.component import queryMultiAdapter

    30 from zope.interface import implements

    31 

    32 # import local packages

    33 

    34 

    35 class SkinTalesAPI(object):

    36 

    37     implements(ISkinTalesAPI, ITALESFunctionNamespace)

    38 

    39     def __init__(self, context):

    40         self.context = context

    41 

    42     def setEngine(self, engine):

    43         self.request = engine.vars['request']

    44 

    45     def presentation(self):

    46         adapter = queryMultiAdapter((self.context, self.request), IPresentationTarget)

    47         if adapter is not None:

    48             interface = adapter.target_interface

    49             return interface(self.context)

    50 

    51 

    52 class ContentMetasTalesAPI(object):

    53 

    54     implements(IContentMetasAPI, ITALESFunctionNamespace)

    55 

    56     def __init__(self, context):

    57         self.context = context

    58 

    59     def setEngine(self, engine):

    60         self.request = engine.vars['request']

    61 

    62     def items(self):

    63         headers = queryMultiAdapter((self.context, self.request), IPageMetasHeaders)

    64         if headers is None:

    65             return []

    66         else:

    67             return headers.metas

    68 

    69     def render(self):

    70         headers = queryMultiAdapter((self.context, self.request), IPageMetasHeaders)

    71         if headers is None:

    72             return u''

    73         else:

    74             return '\n'.join((meta.render() for meta in headers.metas))