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##############################################################################
#
# Zope Public License (ZPL) Version 1.0
# -------------------------------------
#
# Copyright (c) Digital Creations. All rights reserved.
#
# This license has been certified as Open Source(tm).
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# 1. Redistributions in source code must retain the above copyright
# notice, this list of conditions, and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions, and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# 3. Digital Creations requests that attribution be given to Zope
# in any manner possible. Zope includes a "Powered by Zope"
# button that is installed by default. While it is not a license
# violation to remove this button, it is requested that the
# attribution remain. A significant investment has been put
# into Zope, and this effort will continue if the Zope community
# continues to grow. This is one way to assure that growth.
#
# 4. All advertising materials and documentation mentioning
# features derived from or use of this software must display
# the following acknowledgement:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# In the event that the product being advertised includes an
# intact Zope distribution (with copyright and license included)
# then this clause is waived.
#
# 5. Names associated with Zope or Digital Creations must not be used to
# endorse or promote products derived from this software without
# prior written permission from Digital Creations.
#
# 6. Modified redistributions of any form whatsoever must retain
# the following acknowledgment:
#
# "This product includes software developed by Digital Creations
# for use in the Z Object Publishing Environment
# (http://www.zope.org/)."
#
# Intact (re-)distributions of any official Zope release do not
# require an external acknowledgement.
#
# 7. Modifications are encouraged but must be packaged separately as
# patches to official Zope releases. Distributions that do not
# clearly separate the patches from the original work must be clearly
# labeled as unofficial distributions. Modifications which do not
# carry the name Zope may be packaged in any form, as long as they
# conform to all of the clauses above.
#
#
# Disclaimer
#
# THIS SOFTWARE IS PROVIDED BY DIGITAL CREATIONS ``AS IS'' AND ANY
# EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DIGITAL CREATIONS OR ITS
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
# OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
#
# This software consists of contributions made by Digital Creations and
# many individuals on behalf of Digital Creations. Specific
# attributions are listed in the accompanying credits file.
#
##############################################################################
'''
Expressions in a web-configurable workflow.
$Id: Expression.py,v 1.7 2001/09/18 19:38:28 jens Exp $
'''
__version__='$Revision: 1.7 $'[11:-2]
import Globals
from Globals import Persistent
from Acquisition import aq_inner, aq_parent
from AccessControl import getSecurityManager, ClassSecurityInfo
from DateTime import DateTime
from Products.CMFCore.WorkflowCore import ObjectDeleted, ObjectMoved
from Products.PageTemplates.Expressions import getEngine
from Products.PageTemplates.TALES import SafeMapping
from Products.PageTemplates.PageTemplate import ModuleImporter
class Expression (Persistent):
text = ''
_v_compiled = None
security = ClassSecurityInfo()
def __init__(self, text):
self.text = text
self._v_compiled = getEngine().compile(text)
def __call__(self, econtext):
compiled = self._v_compiled
if compiled is None:
compiled = self._v_compiled = getEngine().compile(self.text)
# ?? Maybe expressions should manipulate the security
# context stack.
res = compiled(econtext)
if isinstance(res, Exception):
raise res
#print 'returning %s from %s' % (`res`, self.text)
return res
Globals.InitializeClass(Expression)
class StateChangeInfo:
'''
Provides information for expressions and scripts.
'''
_date = None
ObjectDeleted = ObjectDeleted
ObjectMoved = ObjectMoved
security = ClassSecurityInfo()
security.setDefaultAccess('allow')
def __init__(self, object, workflow, status=None, transition=None,
old_state=None, new_state=None, kwargs=None):
if kwargs is None:
kwargs = {}
else:
# Don't allow mutation
kwargs = SafeMapping(kwargs)
if status is None:
tool = aq_parent(aq_inner(workflow))
status = tool.getStatusOf(workflow.id, object)
if status is None:
status = {}
if status:
# Don't allow mutation
status = SafeMapping(status)
self.object = object
self.workflow = workflow
self.old_state = old_state
self.new_state = new_state
self.transition = transition
self.status = status
self.kwargs = kwargs
def __getitem__(self, name):
if name[:1] != '_' and hasattr(self, name):
return getattr(self, name)
raise KeyError, name
def getHistory(self):
wf = self.workflow
tool = aq_parent(aq_inner(wf))
wf_id = wf.id
h = tool.getHistoryOf(wf_id, self.object)
if h:
return map(lambda dict: dict.copy(), h) # Don't allow mutation
else:
return ()
def getPortal(self):
ob = self.object
while ob is not None and not getattr(ob, '_isPortalRoot', 0):
ob = aq_parent(aq_inner(ob))
return ob
def getDateTime(self):
date = self._date
if not date:
date = self._date = DateTime()
return date
Globals.InitializeClass(StateChangeInfo)
def createExprContext(sci):
'''
An expression context provides names for TALES expressions.
'''
ob = sci.object
wf = sci.workflow
data = {
'here': ob,
'container': aq_parent(aq_inner(ob)),
'nothing': None,
'root': wf.getPhysicalRoot(),
'request': getattr( ob, 'REQUEST', None ),
'modules': ModuleImporter,
'user': getSecurityManager().getUser(),
'state_change': sci,
'transition': sci.transition,
'status': sci.status,
'kwargs': sci.kwargs,
'workflow': wf,
'scripts': wf.scripts,
}
return getEngine().getContext(data)
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