How to override enable_conversation added.

docs/source/howtos/howto_override_comments_viewlet.txt

@@ -1,6 +1,6 @@
-================================================================================
+===============================================================================
 How to override plone.app.discussion's comments viewlet
-================================================================================
+===============================================================================
 
 This document explains how to override the plone.app.discussion comments
 viewlet that controls the way existing comments are displayed.

docs/source/howtos/howto_override_enable_conversation.txt

@@ -1,12 +1,25 @@
+==============================================================================
+Howto override the enable_conversation method.
+==============================================================================
 
-configure.zcml::
+plone.app.discussion way to decide if commenting is enabled on a content
+object can be quite complex and cumbersome due to the need to be backward
+compatible with the way the old commenting system in Plone (<4.1) worked.
+
+The comments viewlet calls the enabled method of the ConversationView to
+decide if the add comment form should show up:
+
+.. literalinclude:: ../../../plone/app/discussion/browser/conversation.py
+   :language: python
+   :pyobject: ConversationView
+
+If you want to override this behavior, you just have to create your own enabled method. To do so, we first have to register our custom
+ConversationView by overriding the existing one in our configure.zcml::
 
     <configure
       xmlns="http://namespaces.zope.org/zope"
       xmlns:browser="http://namespaces.zope.org/browser"
-      xmlns:plone="http://namespaces.plone.org/plone"
+      i18n_domain="mycustompackage.discussion">
-      xmlns:grok="http://namespaces.zope.org/grok"
-      i18n_domain="freitag.behavior.allowdiscussion">
 
       <!-- Override plone.app.discussion's conversation view -->
       <browser:page
@@ -18,21 +31,16 @@ configure.zcml::
 
     </configure>
 
-conversation.py
+Now we implement the conversation view with a single "enable" method in
+conversation.py::
 
     from zope.component import queryUtility
 
     from plone.registry.interfaces import IRegistry
 
-    from Acquisition import aq_base
-    from Acquisition import aq_chain
     from Acquisition import aq_inner
 
     from Products.CMFCore.utils import getToolByName
-    from Products.CMFCore.interfaces import IFolderish
-    
-    from Products.CMFPlone.interfaces import IPloneSiteRoot
-    from Products.CMFPlone.interfaces import INonStructuralFolder
 
     from plone.app.discussion.interfaces import IDiscussionSettings
 

docs/source/howtos/howto_write_a_custom_email_notification.txt

@@ -1,6 +1,6 @@
-================================================================================
+===============================================================================
 Howto write a custom email notification
-================================================================================
+===============================================================================
 
 This document explains how to write a custom email notification for
 plone.app.discussion.

docs/source/howtos/index.txt

@@ -6,3 +6,4 @@ Howtos
    :maxdepth: 1
 
    howto_extend_the_comment_form.txt
+   howto_override_enable_conversation.txt