/usr/share/pyshared/zope/publisher/skinnable.py is in python-zope.publisher 3.12.6-2ubuntu1.
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#
# Copyright (c) 2001, 2002 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Browser-specific Publisher classes
Here we define the specific 'BrowserRequest' and 'BrowserResponse' class. The
big improvement of the 'BrowserRequest' to 'HTTPRequest' is that is can handle
HTML form data and convert them into a Python-native format. Even file data is
packaged into a nice, Python-friendly 'FileUpload' object.
"""
__docformat__ = 'restructuredtext'
import zope.component
import zope.interface
import zope.interface.interfaces
from zope.publisher import interfaces
class SkinChangedEvent(object):
"""Skin changed event."""
zope.interface.implements(interfaces.ISkinChangedEvent)
def __init__(self, request):
self.request = request
def getDefaultSkin(request):
"""Returns the IDefaultSkin layer for IBrowserRequest."""
return interfaces.browser.IDefaultBrowserLayer
def setDefaultSkin(request):
"""Sets the default skin for a given request."""
adapters = zope.component.getSiteManager().adapters
skin = adapters.lookup((zope.interface.providedBy(request),),
interfaces.IDefaultSkin, '')
if skin is None:
# Find a named ``default`` adapter providing IDefaultSkin as fallback.
skin = adapters.lookup((zope.interface.providedBy(request),),
interfaces.IDefaultSkin, 'default')
if skin is None:
# Let's be nice and continue to work for IBrowserRequest's
# without relying on adapter registrations.
if interfaces.browser.IBrowserRequest.providedBy(request):
skin = getDefaultSkin
if skin is not None:
if not zope.interface.interfaces.IInterface.providedBy(skin):
# The default fallback skin is registered as a named adapter.
skin = skin(request)
else:
# The defaultSkin directive registers skins as interfaces and not
# as adapters. We will not try to adapt the request to an
# interface to produce an interface.
pass
if interfaces.ISkinType.providedBy(skin):
# silently ignore skins which do not provide ISkinType
zope.interface.directlyProvides(request, skin)
else:
raise TypeError("Skin interface %s doesn't provide ISkinType" %
skin)
def applySkin(request, skin):
"""Change the presentation skin for this request."""
# Remove all existing skin type declarations (commonly the default skin)
# based on the given skin type.
ifaces = [iface for iface in zope.interface.directlyProvidedBy(request)
if not interfaces.ISkinType.providedBy(iface)]
# Add the new skin.
ifaces.append(skin)
zope.interface.directlyProvides(request, *ifaces)
zope.event.notify(SkinChangedEvent(request))
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