--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_content/shared/common/zmi/reference.py	Fri Jan 04 12:20:10 2019 +0100
@@ -0,0 +1,73 @@
+#
+# Copyright (c) 2008-2019 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'
+
+from z3c.form import button, field
+from z3c.form.interfaces import INPUT_MODE
+from zope.interface import Interface, implementer
+
+from pyams_content import _
+from pyams_content.interfaces import MANAGE_CONTENT_PERMISSION
+from pyams_form.form import ajax_config
+from pyams_form.help import FormHelp
+from pyams_form.interfaces.form import IFormHelp, IUncheckedEditFormButtons, IWidgetForm
+from pyams_pagelet.pagelet import pagelet_config
+from pyams_sequence.interfaces import IInternalReferencesList
+from pyams_skin.interfaces import IInnerPage
+from pyams_skin.layer import IPyAMSLayer
+from pyams_skin.viewlet.menu import MenuItem
+from pyams_utils.adapter import adapter_config
+from pyams_utils.interfaces import VIEW_SYSTEM_PERMISSION
+from pyams_viewlet.viewlet import viewlet_config
+from pyams_zmi.form import AdminEditForm
+from pyams_zmi.interfaces.menu import IPropertiesMenu
+from pyams_zmi.layer import IAdminLayer
+
+
+@viewlet_config(name='references.menu', context=IInternalReferencesList, layer=IAdminLayer,
+                manager=IPropertiesMenu, permission=VIEW_SYSTEM_PERMISSION, weight=80)
+class ReferencesMenu(MenuItem):
+    """Internal references menu"""
+
+    label = _("References...")
+    icon_class = 'fa-external-link-square fa-rotate-90'
+    url = '#references.html'
+
+
+@pagelet_config(name='references.html', context=IInternalReferencesList, layer=IPyAMSLayer,
+                permission=VIEW_SYSTEM_PERMISSION)
+@ajax_config(name='references.json', context=IInternalReferencesList, layer=IPyAMSLayer,
+             permission=MANAGE_CONTENT_PERMISSION)
+@implementer(IWidgetForm, IInnerPage)
+class InternalReferencesEditForm(AdminEditForm):
+    """Internal references edit form"""
+
+    legend = _("Internal references settings")
+
+    fields = field.Fields(IInternalReferencesList)
+
+    @property
+    def buttons(self):
+        if self.mode == INPUT_MODE:
+            return button.Buttons(IUncheckedEditFormButtons)
+        else:
+            return button.Buttons(Interface)
+
+
+@adapter_config(context=(IInternalReferencesList, IPyAMSLayer, InternalReferencesEditForm), provides=IFormHelp)
+class InternalReferencesEditFormHelp(FormHelp):
+    """Internal references edit form help"""
+
+    message = _("Internal references selected here will be usable by views which are using references "
+                "defined by their application context.")
+    message_format = 'rest'