From 7612ce0f83b41296fca1c52bc37ad330d39b0315 Mon Sep 17 00:00:00 2001
From: "Jens W. Klein" <jk@kleinundpartner.at>
Date: Thu, 28 Mar 2019 14:50:51 +0100
Subject: [PATCH] housekeeping - steps to get rid of plone.app.widgets

---
 plone/app/z3cform/configure.zcml |  6 ++++++
 plone/app/z3cform/factories.py   |  0
 plone/app/z3cform/interfaces.py  | 14 ++++++++++++++
 3 files changed, 20 insertions(+)
 create mode 100644 plone/app/z3cform/factories.py

diff --git a/plone/app/z3cform/configure.zcml b/plone/app/z3cform/configure.zcml
index 09d2c39c..63d81dac 100644
--- a/plone/app/z3cform/configure.zcml
+++ b/plone/app/z3cform/configure.zcml
@@ -221,4 +221,10 @@
            for="z3c.form.interfaces.ITextWidget
                 plone.app.z3cform.interfaces.IPloneFormLayer"/>
 
+  <utility
+    name="ZPublisher.HTTPRequest.FileUpload"
+    provides="plone.namedfile.interfaces.IStorage"
+    factory=".factories.Zope2FileUploadStorable"
+  />
+
 </configure>
diff --git a/plone/app/z3cform/factories.py b/plone/app/z3cform/factories.py
new file mode 100644
index 00000000..e69de29b
diff --git a/plone/app/z3cform/interfaces.py b/plone/app/z3cform/interfaces.py
index 3ed0e2a5..b4e52d9b 100644
--- a/plone/app/z3cform/interfaces.py
+++ b/plone/app/z3cform/interfaces.py
@@ -4,6 +4,7 @@
 from z3c.form.interfaces import ISelectWidget as IBaseSelectWidget
 from z3c.form.interfaces import ISingleCheckBoxWidget
 from z3c.form.interfaces import ITextWidget
+from zope.interface import Interface
 from zope.schema.interfaces import IDate
 from zope.schema.interfaces import IDatetime
 
@@ -12,6 +13,19 @@ class IPloneFormLayer(IFormLayer):
     """Request layer installed via browserlayer.xml"""
 
 
+class IFieldPermissionChecker(Interface):
+    """Adapter factory for checking whether a user has permission to
+    edit a specific field on a content object.
+    """
+
+    def validate(field_name, vocabulary_name=None):
+        """Returns True if the current user has permission to edit the
+        `field_name` field.  Returns False if the user does not have
+        permission.  Raises and AttributeError if the field cannot be
+        found.
+        """
+
+
 class IDateField(IDate):
     """Marker interface for the DateField."""