305c8dc5d3
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@3382 fd906abe-77d9-0310-91a1-e0d9ade77398
99 lines
3.8 KiB
Python
99 lines
3.8 KiB
Python
#
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# Copyright (c) 2009 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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Layout node traversers.
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$Id$
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"""
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from zope.app.container.traversal import ItemTraverser
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from zope.cachedescriptors.property import Lazy
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from zope import component
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from zope.component import adapts
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from zope.publisher.interfaces import NotFound
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from loops.common import adapted
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from loops.i18n.browser import LanguageInfo
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from loops.layout.interfaces import ILayoutNode
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from loops.versioning.util import getVersion
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from loops import util
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class NodeTraverser(ItemTraverser):
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adapts(ILayoutNode)
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def publishTraverse(self, request, name):
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viewAnnotations = request.annotations.setdefault('loops.view', {})
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viewAnnotations['node'] = self.context
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if name == '.loops':
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return self.context.getLoopsRoot()
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if name.startswith('.'):
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name = self.cleanUpTraversalStack(request, name)[1:]
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if name:
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if name.startswith('target'):
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name = name[6:]
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if '-' in name:
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name, ignore = name.split('-', 1)
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uid = int(name)
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target = util.getObjectForUid(uid)
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else:
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target = self.context.target
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if target is not None:
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target = getVersion(target, request)
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target = adapted(target, LanguageInfo(target, request))
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viewAnnotations['target'] = target
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tv = component.getMultiAdapter((target, request), name='layout')
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viewAnnotations['targetView'] = tv
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return self.context
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if self.context.target is not None:
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# check for specialized traverser
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traverser = IPublishTraverse(adapted(self.context.target), None)
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if traverser is not None:
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target = traverser.publishTraverse(self, request, name)
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if target is not None:
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viewAnnotations['target'] = target
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tv = component.getMultiAdapter((target, request), name='layout')
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viewAnnotations['targetView'] = tv
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return self.context
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obj = None
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# for name, tr in component.getAdapters(self.context, IPublishTraverse):
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# if name:
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# obj = tr.publishTraverse(request, name)
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if obj is None:
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try:
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obj = super(NodeTraverser, self).publishTraverse(request, name)
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except NotFound, e:
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viewAnnotations['pageName'] = name
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return self.context
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return obj
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def cleanUpTraversalStack(self, request, name):
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traversalStack = request._traversal_stack
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while traversalStack and traversalStack[0].startswith('.'):
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# skip obsolete target references in the url
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name = traversalStack.pop(0)
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traversedNames = request._traversed_names
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if traversedNames:
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lastTraversed = traversedNames[-1]
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if lastTraversed.startswith('.') and lastTraversed != name:
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# let <base .../> tag show the current object
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traversedNames[-1] = name
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return name
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