plugin pubsub schema, tools (common/template xmlui): use a JID for publisher:

- a JidWidget is used instead of text for publisher, nothing is set if publisher attribute
  doesn't exist
- added missing JidWidget implementation in tools.common.template_xmlui

sat/tools/common/template_xmlui.py

@@ -22,11 +22,10 @@
 XMLUI classes from this modules can then be iterated to create the template
 """
 
-from sat.core.log import getLogger
-
-log = getLogger(__name__)
-from sat_frontends.tools import xmlui
 from functools import partial
+from sat.core.log import getLogger
+from sat_frontends.tools import xmlui
+from sat_frontends.tools import jid
 try:
     from jinja2 import Markup as safe
 except ImportError:
@@ -35,6 +34,9 @@ except ImportError:
     safe = lambda x: x
 
 
+log = getLogger(__name__)
+
+
 ## Widgets ##
 
 
@@ -119,6 +121,13 @@ class TextWidget(xmlui.TextWidget, ValueWidget):
     type = "text"
 
 
+class JidWidget(xmlui.JidWidget, ValueWidget):
+    type = "jid"
+
+    def __init__(self, xmlui_parent, value):
+        self.value = jid.JID(value)
+
+
 class LabelWidget(xmlui.LabelWidget, ValueWidget):
     type = "label"
 
@@ -137,7 +146,6 @@ class StringWidget(xmlui.StringWidget, InputWidget):
 class JidInputWidget(xmlui.JidInputWidget, StringWidget):
     type = "jid"
 
-
 class TextBoxWidget(xmlui.TextWidget, InputWidget):
     type = "textbox"