--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ztfy/utils/browser/encoding.py	Mon Mar 05 08:27:17 2012 +0100
@@ -0,0 +1,54 @@
+### -*- coding: utf-8 -*- ####################################################
+##############################################################################
+#
+# Copyright (c) 2008-2012 Thierry Florac <tflorac AT ulthar.net>
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+__docformat__ = "restructuredtext"
+
+# import standard packages
+
+# import Zope3 interfaces
+from z3c.form.interfaces import ISelectWidget, IFieldWidget
+from zope.publisher.interfaces.browser import IBrowserRequest
+
+# import local interfaces
+
+# import Zope3 packages
+from z3c.form.browser.select import SelectWidget
+from z3c.form.widget import FieldWidget
+from zope.component import adapter
+from zope.interface import implementer, implementsOnly
+
+# import local packages
+from ztfy.utils.encoding import IEncodingField
+
+from ztfy.utils import _
+
+
+class IEncodingSelectWidget(ISelectWidget):
+    """ENcoding select widget interface"""
+
+
+class EncodingSelectWidget(SelectWidget):
+    """Encoding select widget"""
+
+    implementsOnly(IEncodingSelectWidget)
+
+    noValueMessage = _("-- automatic selection --")
+
+
+@adapter(IEncodingField, IBrowserRequest)
+@implementer(IFieldWidget)
+def EncodingSelectFieldWidget(field, request):
+    """IFieldWidget factory for IEncodingSelectWidget"""
+    return FieldWidget(field, EncodingSelectWidget(request))