d40012fb18
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@2261 fd906abe-77d9-0310-91a1-e0d9ade77398
61 lines
2.2 KiB
Python
61 lines
2.2 KiB
Python
#
|
|
# Copyright (c) 2008 Helmut Merz helmutm@cy55.de
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
#
|
|
|
|
"""
|
|
Compound objects like articles, blog posts, storyboard items, ...
|
|
|
|
$Id$
|
|
"""
|
|
|
|
from zope.interface import Interface, Attribute
|
|
from zope import interface, component, schema
|
|
|
|
from loops.util import _
|
|
|
|
|
|
class ICompound(Interface):
|
|
""" A compound is a concept that is built up of other objects, its
|
|
components.
|
|
|
|
These components are typically resources, but may also be other
|
|
concepts that should provide the ICompound interface as their
|
|
type interface. The components are assigned in an ordered way
|
|
so that the components are accessed in a reproducible order.
|
|
|
|
The components are bound to the compound via standard resource
|
|
or concept relations using a special predicate, ``ispartof``.
|
|
"""
|
|
|
|
components = Attribute('Objects (resources or other compounds) that '
|
|
'this object consists of')
|
|
|
|
def add(obj, position=None):
|
|
""" Add a component to the compound.
|
|
|
|
If the ``position`` argument is None, append it to the end
|
|
of the current list of components, otherwise insert it before
|
|
the position given. The numbering of the positions is like for
|
|
Python lists, so 0 means before the first one, -1 before the
|
|
last one.
|
|
"""
|
|
|
|
def reorder(components):
|
|
""" Change the order settings of the relations that connect the
|
|
components given (a sequence) to the compound so that they are
|
|
ordered according to this sequence.
|
|
"""
|