[Zope] Simple Breadcrumbs in ZPT

[Troy Farrell]

Zopelabs.com is normally the place to look for code snippets.

I put these in my site root and use them for almost every site I host.  The page 
template I call 'you_are_here' and the python script 'breadcrumbs'.  I probably 
stole these from something.  Mebbe from early CMF (?)

Page Template:
<div class="breadcrumbs" style="text-align:left;">
you are here:
   <span tal:repeat="crumb here/breadcrumbs">
     <a tal:attributes="href string:${crumb/absolute_url}/;
                        title crumb/title;"
        tal:content="crumb/title_or_id">home</a>
     <span 
tal:condition="not:repeat/crumb/end">&nbsp;<strong>&raquo;</strong>&nbsp;</span>
   </span>
</div>

Python Script:
## Script (Python) "breadcrumbs"
##bind container=container
##bind context=context
##bind namespace=
##bind script=script
##bind subpath=traverse_subpath
##parameters=
##title=
##
root = ('',)
breadcrumbs = []
request = context.REQUEST
vRoot = request.has_key('VirtualRootPhysicalPath')

# Subtle bug fixed below.
# PARENTS is a list.  We must work on a copy because
# we call reverse() on it.  Previously, we were reversing
# the PARENTS list, making us unable to call this script
# twice for a given HTTP REQUEST
PARENTS = context.REQUEST.PARENTS[:]

foldertypes = ('Folder','Photo Folder')

PARENTS.reverse()
if vRoot:
     root = request.VirtualRootPhysicalPath #inside if block
     PARENTS = PARENTS[len(root)-1:] #inside if block

for crumb in PARENTS:
     if crumb.meta_type in foldertypes: breadcrumbs.append(crumb) #inside for block
     else: return breadcrumbs  #inside for block

return breadcrumbs
##### END Python Script #####

Troy

-- 
And the glory of the LORD shall be revealed, and all flesh shall see it 
together: for the mouth of the LORD hath spoken it.
Isaiah 40.5

Michael Fox wrote:
> Hi *,
> 
> Can someone please point me in the right direction here.
> 
> I'm looking for a simple python/zpt snippet to do breadcrumbs in my
> master page template.