diff -r 000000000000 -r b97547f5f1fa web/views/ibreadcrumbs.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/views/ibreadcrumbs.py	Wed Nov 05 15:52:50 2008 +0100
@@ -0,0 +1,88 @@
+"""navigation components definition for CubicWeb web client
+
+:organization: Logilab
+:copyright: 2001-2008 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
+:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
+"""
+__docformat__ = "restructuredtext en"
+
+from logilab.mtconverter import html_escape
+
+from cubicweb.interfaces import IBreadCrumbs
+from cubicweb.common.selectors import (contextprop_selector, onelinerset_selector, 
+                                    interface_selector)
+from cubicweb.common.view import EntityView
+from cubicweb.common.uilib import cut
+# don't use AnyEntity since this may cause bug with isinstance() due to reloading
+from cubicweb.common.entity import Entity
+from cubicweb.web.component import EntityVComponent
+
+_ = unicode
+
+def bc_title(entity):
+    textsize = entity.req.property_value('navigation.short-line-size')
+    return html_escape(cut(entity.dc_title(), textsize))
+    
+
+class BreadCrumbEntityVComponent(EntityVComponent):
+    id = 'breadcrumbs'
+    # register msg not generated since no entity implements IPrevNext in cubicweb itself
+    title = _('contentnavigation_breadcrumbs')
+    help = _('contentnavigation_breadcrumbs_description')
+    __selectors__ = (onelinerset_selector, contextprop_selector, interface_selector)
+    accepts_interfaces = (IBreadCrumbs,)
+    context = 'navtop'
+    order = 5
+    visible = False
+    separator = u' > '
+
+    def call(self, view=None, first_separator=True):
+        entity = self.entity(0)
+        path = entity.breadcrumbs(view)
+        if path:
+            self.w(u'<span class="pathbar">')
+            if first_separator:
+                self.w(self.separator)
+            root = path.pop(0)
+            if isinstance(root, Entity):
+                self.w(u'<a href="%s">%s</a>' % (self.req.build_url(root.id),
+                                                 root.dc_type('plural')))
+                self.w(self.separator)
+            self.wpath_part(root, entity, not path)
+            for i, parent in enumerate(path):
+                self.w(self.separator)
+                self.w(u"\n")
+                self.wpath_part(parent, entity, i == len(path) - 1)
+            self.w(u'</span>')
+            
+    def wpath_part(self, part, contextentity, last=False):
+        if isinstance(part, Entity):
+            if last and part.eid == contextentity.eid:
+                self.w(bc_title(part))
+            else:
+                part.view('breadcrumbs', w=self.w)
+        elif isinstance(part, tuple):
+            url, title = part
+            textsize = self.req.property_value('navigation.short-line-size')
+            self.w(u'<a href="%s">%s</a>' % (
+                html_escape(url), html_escape(cut(title, textsize))))
+        else:
+            textsize = self.req.property_value('navigation.short-line-size')
+            self.w(cut(unicode(part), textsize))
+        
+
+class BreadCrumbComponent(BreadCrumbEntityVComponent):
+    __registry__ = 'components'
+    __selectors__ = (onelinerset_selector, interface_selector)
+    visible = True
+
+
+class BreadCrumbView(EntityView):
+    id = 'breadcrumbs'
+
+    def cell_call(self, row, col):
+        entity = self.entity(row, col)
+        desc = cut(entity.dc_description(), 50)
+        self.w(u'<a href="%s" title="%s">%s</a>' % (html_escape(entity.absolute_url()),
+                                                    html_escape(desc),
+                                                    bc_title(entity)))