--- a/web/test/unittest_viewselector.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/test/unittest_viewselector.py	Tue Feb 17 20:39:09 2009 +0100
@@ -9,7 +9,7 @@
 
 
 from cubicweb import CW_SOFTWARE_ROOT as BASE, Binary
-from cubicweb.common.selectors import match_user_groups
+from cubicweb.selectors import match_user_groups, implements, rql_condition
 
 from cubicweb.web._exceptions import NoSelectableObject
 from cubicweb.web.action import Action
@@ -253,7 +253,7 @@
         del req.form['etype']
         # custom creation form
         class EUserCreationForm(baseforms.CreationForm):
-            accepts = ('EUser',)
+            __selectors__ = implements('EUSer')
         self.vreg.register_vobject_class(EUserCreationForm)
         req.form['etype'] = 'EUser'
         self.assertIsInstance(self.vreg.select_view('creation', req, rset),
@@ -434,15 +434,11 @@
             del self.vreg[SomeAction.__registry__][SomeAction.id]
 
 
-        
-
-
-from cubicweb.web.action import EntityAction
+from cubicweb.web.action import Action
 
 class EETypeRQLAction(EntityAction):
     id = 'testaction'
-    accepts = ('EEType',)
-    condition = 'X name "EEType"'
+    __selectors__ = implements('EEType') & rql_condition('X name "EEType"')
     title = 'bla'
 
 class RQLActionTC(ViewSelectorTC):

--- a/web/views/basecomponents.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/basecomponents.py	Tue Feb 17 20:39:09 2009 +0100
@@ -17,7 +17,7 @@
 from cubicweb.common.selectors import yes, non_final_entity, one_line_rset
 from cubicweb.schema import display_name
 from cubicweb.common.selectors import (chainfirst, two_etypes_rset,
-                                    match_form_params)
+                                       match_form_params, relation_possible)
 
 from cubicweb.web.htmlwidgets import MenuWidget, PopupBoxMenu, BoxSeparator, BoxLink
 from cubicweb.web.component import (Component, EntityVComponent, 
@@ -136,10 +136,9 @@
 class WFHistoryVComponent(EntityVComponent):
     """display the workflow history for entities supporting it"""
     id = 'wfhistory'
-    accepts = ('Any',)
+    __selectors__ = EntityVComponent.__selectors__ + (
+        relation_possible('wf_info_for', role='object'),)
     context = 'navcontentbottom'
-    rtype = 'wf_info_for'
-    target = 'subject'
     title = _('Workflow history')
 
     def cell_call(self, row, col, view=None):

--- a/web/views/card.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/card.py	Tue Feb 17 20:39:09 2009 +0100
@@ -6,13 +6,14 @@
 """
 __docformat__ = "restructuredtext en"
 
+from cubicweb.selectors import implements
 from cubicweb.web.views import baseviews
 from logilab.mtconverter import html_escape
 
 _ = unicode
 
 class CardPrimaryView(baseviews.PrimaryView):
-    accepts = ('Card',)
+    __selectors__ = implements('Card')
     skip_attrs = baseviews.PrimaryView.skip_attrs + ('title', 'synopsis', 'wikiid')
     show_attr_label = False
 

--- a/web/views/dynimages.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/dynimages.py	Tue Feb 17 20:39:09 2009 +0100
@@ -13,6 +13,7 @@
 from logilab.common.graph import escape, GraphGenerator, DotBackend
 from yams import schema2dot as s2d
 
+from cubicweb.selectors import implements
 from cubicweb.common.view import EntityView, StartupView
 
 
@@ -108,7 +109,7 @@
 class EETypeSchemaImageView(TmpFileViewMixin, EntityView):
     id = 'eschemagraph'
     content_type = 'image/png'
-    accepts = ('EEType',)
+    __selectors__ = implements('EEType')
     skip_rels = ('owned_by', 'created_by', 'identity', 'is', 'is_instance_of')
     
     def _generate(self, tmpfile):
@@ -120,7 +121,7 @@
                        prophdlr=RestrictedSchemaDotPropsHandler(self.req))
 
 class ERTypeSchemaImageView(EETypeSchemaImageView):
-    accepts = ('ERType',)
+    __selectors__ = implements('ERType')
     
     def _generate(self, tmpfile):
         """display schema information for an entity"""
@@ -186,7 +187,7 @@
 class EETypeWorkflowImageView(TmpFileViewMixin, EntityView):
     id = 'ewfgraph'
     content_type = 'image/png'
-    accepts = ('EEType',)
+    __selectors__ = implements('EEType')
     
     def _generate(self, tmpfile):
         """display schema information for an entity"""

--- a/web/views/emailaddress.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/emailaddress.py	Tue Feb 17 20:39:09 2009 +0100
@@ -8,11 +8,12 @@
 
 from logilab.mtconverter import html_escape
 
+from cubicweb.selectors import implements
 from cubicweb.common import Unauthorized
 from cubicweb.web.views import baseviews
 
 class EmailAddressPrimaryView(baseviews.PrimaryView):
-    accepts = ('EmailAddress',)
+    __selectors__ = implements('EmailAddress')
     
     def cell_call(self, row, col, skipeids=None):
         self.skipeids = skipeids
@@ -59,7 +60,7 @@
 
 
 class EmailAddressShortPrimaryView(EmailAddressPrimaryView):
-    accepts = ('EmailAddress',)
+    __selectors__ = implements('EmailAddress')
     id = 'shortprimary'
     title = None # hidden view
     def render_entity_attributes(self, entity, siderelations):
@@ -69,7 +70,7 @@
 
     
 class EmailAddressOneLineView(baseviews.OneLineView):
-    accepts = ('EmailAddress',)
+    __selectors__ = implements('EmailAddress')
     
     def cell_call(self, row, col, **kwargs):
         entity = self.entity(row, col)
@@ -89,7 +90,7 @@
     'mailto:'"""
 
     id = 'mailto'
-    accepts = ('EmailAddress',)
+    __selectors__ = implements('EmailAddress')
     
     def cell_call(self, row, col, **kwargs):
         entity = self.entity(row, col)
@@ -113,7 +114,7 @@
 
     
 class EmailAddressTextView(baseviews.TextView):
-    accepts = ('EmailAddress',)
+    __selectors__ = implements('EmailAddress')
     
     def cell_call(self, row, col, **kwargs):
         self.w(self.entity(row, col).display_address())

--- a/web/views/eproperties.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/eproperties.py	Tue Feb 17 20:39:09 2009 +0100
@@ -7,8 +7,9 @@
 """
 __docformat__ = "restructuredtext en"
 
+from cubicweb.selectors import implements
 from cubicweb.web.views import baseviews
 
 class EPropertyPrimaryView(baseviews.PrimaryView):
-    accepts = ('EProperty',)
+    __selectors__ = implements('EProperty')
     skip_none = False

--- a/web/views/euser.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/euser.py	Tue Feb 17 20:39:09 2009 +0100
@@ -31,7 +31,7 @@
 
 
 class EUserPrimaryView(PrimaryView):
-    __selectors__ = (implements('EUser'),)
+    __selectors__ = implements('EUser')
     
     skip_attrs = ('firstname', 'surname')
     
@@ -51,7 +51,7 @@
                                  ]
 class FoafView(EntityView):
     id = 'foaf'
-    __selectors__ = (implements('EUser'),)
+    __selectors__ = implements('EUser')
     
     title = _('foaf')
     templatable = False
@@ -97,7 +97,7 @@
     """displays a simple euser / egroups editable table"""
     
     id = 'editgroups'
-    accepts = ('EUser',)
+    __selectors__ = implements('EUser')
     
     def call(self):
         self.req.add_css('cubicweb.acl.css')            

--- a/web/views/management.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/management.py	Tue Feb 17 20:39:09 2009 +0100
@@ -475,7 +475,7 @@
                    chainall(one_line_rset, match_user_groups('managers'))
         )
         
-    accepts = ('EUser',)
+    __selectors__ = (implements('EUser',))
 
     title = _('preferences')
 

--- a/web/views/owl.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/owl.py	Tue Feb 17 20:39:09 2009 +0100
@@ -155,7 +155,6 @@
     id = 'owlabox'
     title = _('owlabox')
     templatable = False
-    accepts = ('Any',)
     content_type = 'application/xml' # 'text/xml'
     
     def call(self):
@@ -170,11 +169,9 @@
 
         
 class OWLABOXItemView(EntityView):
-    '''This view represents a part of the ABOX for a given entity.'''
-    
+    '''This view represents a part of the ABOX for a given entity.'''    
     id = 'owlaboxitem'
     templatable = False
-    accepts = ('Any',)
     content_type = 'application/xml' # 'text/xml'
 
     def cell_call(self, row, col, skiprels=DEFAULT_SKIP_RELS):

--- a/web/views/schemaentities.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/schemaentities.py	Tue Feb 17 20:39:09 2009 +0100
@@ -8,7 +8,7 @@
 
 from logilab.mtconverter import html_escape
 
-from cubicweb.selectors import implements
+from cubicweb.selectors import implements, rql_condition
 from cubicweb.schemaviewer import SchemaViewer
 from cubicweb.common.uilib import ureport_as_html
 from cubicweb.common.view import EntityView
@@ -16,7 +16,7 @@
 
 
 class ImageView(EntityView):
-    accepts = ('EEType',)
+    __selectors__ = implements('EEType')
     id = 'image'
     title = _('image')
 
@@ -36,16 +36,16 @@
         return html_escape(entity.dc_long_title())
     
 class EETypePrimaryView(_SchemaEntityPrimaryView):
-    accepts = ('EEType',)
+    __selectors__ = implements('EEType')
     skip_attrs = _SchemaEntityPrimaryView.skip_attrs + ('name', 'meta', 'final')
 
 class ERTypePrimaryView(_SchemaEntityPrimaryView):
-    accepts = ('ERType',)
+    __selectors__ = implements('ERType')
     skip_attrs = _SchemaEntityPrimaryView.skip_attrs + ('name', 'meta', 'final',
                                                         'symetric', 'inlined')
 
 class ErdefPrimaryView(_SchemaEntityPrimaryView):
-    accepts = ('EFRDef', 'ENFRDef')
+    __selectors__ = implements('EEType', 'ENFRDef')
     show_attr_label = True
 
 class EETypeSchemaView(EETypePrimaryView):
@@ -85,7 +85,7 @@
         
 class EETypeWorkflowView(EntityView):
     id = 'workflow'
-    accepts = ('EEType',)
+    __selectors__ = implements('EEType')
     cache_max_age = 60*60*2 # stay in http cache for 2 hours by default 
     
     def cell_call(self, row, col, **kwargs):
@@ -98,7 +98,7 @@
 
 
 class EETypeOneLineView(baseviews.OneLineView):
-    accepts = ('EEType',)
+    __selectors__ = implements('EEType')
     
     def cell_call(self, row, col, **kwargs):
         entity = self.entity(row, col)
@@ -114,12 +114,10 @@
 
 class ViewWorkflowAction(Action):
     id = 'workflow'
-    __selectors__ = (implements('EEType'), )
+    __selectors__ = implements('EEType') & rql_condition('S state_of X')
     
     category = 'mainactions'
     title = _('view workflow')
-    accepts = ('EEType',)
-    condition = 'S state_of X' # must have at least one state associated
     def url(self):
         entity = self.rset.get_entity(self.row or 0, self.col or 0)
         return entity.absolute_url(vid='workflow')

--- a/web/views/tableview.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/tableview.py	Tue Feb 17 20:39:09 2009 +0100
@@ -258,9 +258,9 @@
     
 class CellView(EntityView):
     __selectors__ = (nonempty_rset, accept_rset)
+    # XXX backport implements('Any') ??
     
     id = 'cell'
-    accepts = ('Any',)
     
     def cell_call(self, row, col, cellvid=None):
         """

--- a/web/views/tabs.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/tabs.py	Tue Feb 17 20:39:09 2009 +0100
@@ -132,7 +132,7 @@
     class ProjectScreenshotsView(EntityRelationView):
         '''display project's screenshots'''
         id = title = _('projectscreenshots')
-        accepts = ('Project',)
+        __selectors__ = implements('Project')
         rtype = 'screenshot'
         target = 'object'
         vid = 'gallery'

--- a/web/views/treeview.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/treeview.py	Tue Feb 17 20:39:09 2009 +0100
@@ -8,7 +8,6 @@
 
 class TreeView(EntityView):
     id = 'treeview'
-    accepts = ('Any',)
     itemvid = 'treeitemview'
     css_classes = 'treeview widget'
     title = _('tree view')
@@ -67,7 +66,6 @@
     """default treeitem view for entities which don't implement ITree
     """
     id = 'treeitemview'
-    accepts = ('Any',)
     
     def cell_call(self, row, col, vid='oneline', parentvid='treeview'):
         entity = self.entity(row, col)
@@ -84,10 +82,7 @@
     (each item should be exandable if it's not a tree leaf)
     """
     id = 'treeitemview'
-    # XXX append yes to make sure we get an higher score than
-    #     the default treeitem view
-    __selectors__ = (implement_interface, yes)
-    accepts_interfaces = (ITree,)
+    __selectors__ = implements(ITree)
     
     def cell_call(self, row, col, vid='oneline', parentvid='treeview'):
         entity = self.entity(row, col)

--- a/web/views/urlrewrite.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/urlrewrite.py	Tue Feb 17 20:39:09 2009 +0100
@@ -59,7 +59,6 @@
     __abstract__ = True
 
     id = 'urlrewriting'
-    accepts = ('Any',)
     priority = 1
 
     def rewrite(self, req, uri):

--- a/web/views/vcard.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/vcard.py	Tue Feb 17 20:39:09 2009 +0100
@@ -6,6 +6,7 @@
 """
 __docformat__ = "restructuredtext en"
 
+from cubicweb.selectors import implements
 from cubicweb.common.view import EntityView
 
 _ = unicode 
@@ -18,8 +19,7 @@
     title = _('vcard')
     templatable = False
     content_type = 'text/x-vcard'
-    accepts = ('EUser',)
-        
+    __selectors__ = implements('EUser')        
 
     def set_request_content_type(self):
         """overriden to set a .vcf filename"""

--- a/web/views/wfentities.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/wfentities.py	Tue Feb 17 20:39:09 2009 +0100
@@ -6,11 +6,13 @@
 """
 __docformat__ = "restructuredtext en"
 
+from cubicweb.selectors import implements
 from cubicweb.common.view import EntityView
 
 class CellView(EntityView):
     id = 'cell'
-    accepts = ('TrInfo',)
+    __selectors__ = implements('TrInfo')
+    
     def cell_call(self, row, col, cellvid=None):
         entity = self.entity(row, col)
         self.w(entity.printable_value('comment'))

--- a/web/views/xbel.py	Tue Feb 17 20:34:20 2009 +0100
+++ b/web/views/xbel.py	Tue Feb 17 20:39:09 2009 +0100
@@ -47,7 +47,7 @@
         return entity.absolute_url()
         
 class XbelItemBookmarkView(XbelItemView):
-    accepts = ('Bookmark',)
+    __selectors__ = implements('Bookmark')
 
     def url(self, entity):
         return entity.actual_url()