Display Logos Based on Paths

Here is a customization in plone.app.layout/viewlets/common.py that can display customized logos based on tab paths.

class LogoViewlet(ViewletBase):
    index = ViewPageTemplateFile('logo.pt')

    def update(self):
        super(LogoViewlet, self).update()

        portal = self.portal_state.portal()
        bprops = portal.restrictedTraverse('base_properties', None)
        if bprops is not None:
            logoName = bprops.logoName
        else:
            logoName = 'logo.jpg'
        plone_url = getToolByName(self.context, 'portal_url')()
        plone_url_len = len(plone_url)
        request = self.request
        url = request['URL']
        path = url[plone_url_len:]
        if path.startswith('/news'):
            logoName = 'logo-news.png'
        if path.startswith('/events'):
            logoName = 'logo-events.png'

To illustrate how the path variable works, add a Python Script in ZMI and use the following sample code:

from Products.CMFCore.utils import getToolByName

plone_url = getToolByName(context, 'portal_url')()
print "plone_url = %s\n" % (plone_url),
plone_url_len = len(plone_url)
request = context.REQUEST
url = request['URL']
path = url[plone_url_len:]
print "url = %s, path = %s" % (url, path)
return printed