add accessor class to generate getTranslatedProperty and getPropertyTranslationDomain

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5823 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Accessor/Translation.py

+##############################################################################
+#
+# Copyright (c) 2006 Nexedi SARL and Contributors. All Rights Reserved.
+#                    Aurelien Calonne <aurel@nexedi.com>
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsability of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# garantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+from Base import func_code, type_definition, list_types, ATTRIBUTE_PREFIX, Method
+from zLOG import LOG
+from Products.ERP5Type.PsycoWrapper import psyco
+from string import lower
+from Acquisition import aq_base
+from Products.ERP5Type.Cache import CachingMethod
+from Products.CMFCore.utils import getToolByName
+
+from Products.CMFCore.Expression import Expression
+def _evaluateTales(instance=None, value=None):
+  from Products.ERP5Type.Utils import createExpressionContext
+  expression = Expression(value)
+  econtext = createExpressionContext(instance)
+  return expression(econtext)
+
+evaluateTales = CachingMethod(_evaluateTales, id = 'evaluateTales', cache_duration=300)
+
+
+class TranslatedPropertyGetter(Method):
+  """
+  Get the translated property
+  """
+  _need__name__=1
+
+  # This can be called from the Web
+  func_code = func_code()
+  func_code.co_varnames = ('self', )
+  func_code.co_argcount = 1
+  func_defaults = ()
+
+  def __init__(self, id, key, warning=0):
+    self._id = id
+    self.__name__ = id
+    self._key = key
+    self._warning = warning
+
+  def __call__(self, instance, *args, **kw):
+    if self._warning:
+      LOG("ERP5Type Deprecated Getter Id:",0, self._id)
+    prop = self._id[13:]
+    domain_getter_name = "get%sTranslationDomain" %(prop)
+    domain_getter = getattr(instance, domain_getter_name)
+    domain = domain_getter()
+    if domain == '':
+      return instance.getTitle()
+    localizer = getToolByName(instance, 'Localizer')
+    return localizer[domain].gettext(unicode(instance.getTitle(), 'utf8')).encode('utf8')      
+
+  psyco.bind(__call__)
+
+
+class PropertyTranslationDomainGetter(Method):
+  """
+  Get the translation domain
+  """
+  _need__name__=1
+
+  # This can be called from the Web
+  func_code = func_code()
+  func_code.co_varnames = ('self', )
+  func_code.co_argcount = 1
+  func_defaults = ()
+
+  def __init__(self, id, key, property_type, default=None, storage_id=None):
+    self._id = id
+    self.__name__ = id
+    self._key = key
+    self._property_type = property_type
+    self._default = default
+    if storage_id is None:
+      storage_id = "%s%s" % (ATTRIBUTE_PREFIX, key)
+    self._storage_id = storage_id
+    self._is_tales_type = (property_type == 'tales')
+
+  def __call__(self, instance, *args, **kw):
+    if len(args) > 0:
+      default = args[0]
+    else:
+      default = self._default
+    value = getattr(aq_base(instance), self._storage_id, None) # No acquisition on properties
+    if value is None:
+      # second try to get it from portal type
+      prop_name = self._id[3:-17]
+      ptype_domain = None
+      ptype = instance.getPortalType()
+      ptypes_tool = instance.getPortalObject()['portal_types']
+      ptype_domain = ptypes_tool[ptype].getPropertyTranslationDomainDict()[lower(prop_name)].getDomainName()
+      if ptype_domain is '' and default is not None:
+        # then get the default property defined on property sheet
+        value = default
+      else:
+        value = ptype_domain
+    if value is None:
+      value = ''
+    if self._is_tales_type and kw.get('evaluate', 1):
+      return evaluateTales(instance, value)
+    else:
+      return value
+
+  psyco.bind(__call__)
+
+