Don't expose the IContentsSearch interface in the zec.contents.interf…

…ace API

this is just specific to the existing form and not reusable.
Only forms have to define it's own search pattern and the required fields.

src/z3c/contents/browser.py

@@ -64,7 +64,11 @@ def safeGetAttr(obj, attr, default):
 class ContentsSearchForm(form.Form):
 
     template = getPageTemplate()
-    fields = field.Fields(interfaces.IContentsSearch)
+    fields = field.Fields(field.Field(
+        zope.schema.TextLine(
+            title=_(u'Search'),
+            description=_('Search term'),
+            default=u''), 'searchterm'))
     prefix = 'search'
     table = None
     ignoreContext = True

src/z3c/contents/interfaces.py

@@ -28,20 +28,6 @@ class IContentsPage(interfaces.ITable):
     """Container management page."""
 
 
-class IContentsSearch(zope.interface.Interface):
-    """We would like to provide a search field for searching within the
-    container.
-    
-    Possible addition here could be a choice field to search within specific
-    columns.
-    """
-
-    searchterm = zope.schema.TextLine(
-        title=_(u'Search'),
-        description=_('Search term'),
-        default=u'')
-
-
 class ISearch(zope.interface.Interface):
     """
     Search support for containers.