495f048fbb
git-svn-id: svn://svn.cy55.de/Zope3/src/cybertools/trunk@3209 fd906abe-77d9-0310-91a1-e0d9ade77398
147 lines
4.6 KiB
Python
147 lines
4.6 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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Basic (sample) implementations for links and link management
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$Id$
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"""
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from docutils.nodes import Text
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from zope.interface import implements
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from zope.traversing.browser import absoluteURL
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from cybertools.wiki.interfaces import ILink, ILinkManager, ILinkProcessor
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class LinkManager(object):
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""" A very basic link manager implementation.
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"""
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implements(ILinkManager)
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def __init__(self):
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self.links = {}
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self.linksBySource = {}
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def createLink(self, name, source, target, **kw):
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link = Link(name, source, target, **kw)
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link.manager = self
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id = self.generateLinkIdentifier(link)
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self.links[id] = link
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self.linksBySource.setdefault(source, []).append(link)
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return link
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def removeLink(self, link):
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if link.identifier in self.links:
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link.manager = None
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del self.links[link.identifier]
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def query(self, source=None, target=None, name=None, **kw):
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if source is None:
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result = self.links.values()
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else:
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result = self.linksBySource.get(source, [])
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kw.update(dict(target=target, name=name))
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for k, v in kw.items():
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if v is None:
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continue
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if not isinstance(v, (list, tuple)):
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v = [v]
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result = [r for r in result if getattr(r, k) in v]
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return result
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def generateLinkIdentifier(self, link):
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identifier = '%07i' % (max([int(k) for k in self.links.keys()] or [0]) + 1)
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link.identifier = identifier
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return identifier
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class Link(object):
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implements(ILink)
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identifier = None
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manager = None
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def __init__(self, name, source, target, **kw):
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self.name = name
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self.source = source
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self.target = target
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for k, v in kw.items():
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if k not in ILink:
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raise AttributeError(k)
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setattr(self, k, v)
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def getManager(self):
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return self.manager
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def __getattr__(self, attr):
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if attr not in ILink:
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raise AttributeError(attr)
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return self.__dict__.get(attr)
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class LinkProcessor(object):
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implements(ILinkProcessor)
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parent = None # parent (tree) processor
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def __init__(self, context):
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self.node = self.context = context
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self.parent = context.document
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def getProperties(self):
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raise ValueError("Method 'getProperties()' must be implemented by subclass.")
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def process(self, atts):
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#print 'processing reference:', self.node
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props = self.getProperties()
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source = self.parent.context
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wiki = source.getWiki()
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manager = wiki.getManager()
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sourceUid = manager.getUid(source)
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name = props['targetName']
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lmName = source.getConfig('linkManager')
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lm = wiki.getManager().getPlugin(ILinkManager, lmName)
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existing = lm.query(source=sourceUid, name=name)
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if existing:
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link = existing[0]
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target = manager.getObject(link.target)
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else:
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target = wiki.getPage(name)
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targetUid = manager.getUid(target)
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link = lm.createLink(name, sourceUid, targetUid)
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if link.refuri is None:
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request = self.parent.request
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if request is not None:
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if target is None:
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link.refuri = '%s/create.html?linkid=%s' % (
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absoluteURL(wiki, request), link.identifier)
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else:
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link.refuri = absoluteURL(target, request)
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#self.setProperty('href', link.refuri)
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atts['href'] = link.refuri
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if target is None:
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# change CSS class, link text
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# needs overriding of HTMLTranslator.visit_reference()
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#self.setProperty('class', 'create') # no direct effect
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atts['class'] += ' create'
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self.node.insert(0, Text('?'))
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