b4182316af
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@1040 fd906abe-77d9-0310-91a1-e0d9ade77398
85 lines
2.9 KiB
Python
85 lines
2.9 KiB
Python
#
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# Copyright (c) 2006 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Ordered container implementation.
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$Id$
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"""
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from zope.app import zapi
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from zope.app.container.ordered import OrderedContainer as BaseOrderedContainer
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from zope.cachedescriptors.property import Lazy
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from zope.app.container.browser.contents import JustContents
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from zope.app.i18n import ZopeMessageFactory as _
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class OrderedContainerView(JustContents):
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""" A view providing the necessary methods for moving sub-objects
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within an ordered container.
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"""
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@Lazy
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def orderable(self):
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return len(self.context) > 1
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def checkMoveAction(self):
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request = self.request
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for var in request:
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if var.startswith('move_'):
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delta = request.get('delta', 1)
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ids = request.get('ids', [])
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if ids:
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getattr(self, var, None)(ids, delta)
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else:
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self.error = _("You didn't specify any ids to move.")
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return
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def move_down(self, ids=[], delta=1):
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self.context.updateOrder(
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moveByDelta(self.context.keys(), ids, int(delta)))
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def move_up(self, ids=[], delta=1):
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self.context.updateOrder(
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moveByDelta(self.context.keys(), ids, -int(delta)))
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def move_bottom(self, ids=[], delta=0):
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self.context.updateOrder(
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moveByDelta(self.context.keys(), ids, len(self.context)))
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def move_top(self, ids=[], delta=0):
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self.context.updateOrder(
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moveByDelta(self.context.keys(), ids, -len(self.context)))
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def moveByDelta(objs, toMove, delta):
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""" Return the list given by objs re-ordered in a way that the elements
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of toMove (which must be in the objs list) have been moved by delta.
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"""
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result = [obj for obj in objs if obj not in toMove]
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if delta < 0:
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objs = list(reversed(objs))
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result.reverse()
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toMove = sorted(toMove, lambda x,y: cmp(objs.index(x), objs.index(y)))
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for element in toMove:
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newPos = min(len(result), objs.index(element) + abs(delta))
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result.insert(newPos, element)
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if delta < 0:
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result.reverse()
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return result
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