[Zope3-checkins] CVS: zopeproducts/zwiki - metaconfigure.py:1.1 meta.zcml:1.1

[Stephan Richter]

Update of /cvs-repository/zopeproducts/zwiki
In directory cvs.zope.org:/tmp/cvs-serv5908

Added Files:
	metaconfigure.py meta.zcml 
Log Message:
Implemented a directive called 'sourcetype' that makes it trivial to
register new source types via ZCML.


=== Added File zopeproducts/zwiki/metaconfigure.py ===
##############################################################################
#
# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Wiki configuration code

$Id: metaconfigure.py,v 1.1 2003/04/08 04:14:21 srichter Exp $
"""
from zope.interface import implements

from zope.configuration.interfaces import INonEmptyDirective
from zope.configuration.interfaces import ISubdirectiveHandler
from zope.configuration.action import Action
from zope.configuration.exceptions import ConfigurationError
from zope.app.component.metaconfigure import handler

from zopeproducts.zwiki.sourcetype import SourceTypes 

class sourcetype:

    __class_implements__ = INonEmptyDirective
    __implements__ = ISubdirectiveHandler

    def __init__(self, _context, interface, title=u''):
        self.iface = _context.resolve(interface)
        self.title = title
        self.renderers = []

    def renderer(self, _context, for_, factory):
        if for_ == '*':
            for_ = None
        self.renderers.append((_context.resolve(for_),
                              _context.resolve(factory)))
        return ()

    def __call__(self):
        actions = []

        # register each renderer as a view
        for iface, factory in self.renderers:
            actions.append(Action(
                discriminator = ('view', self.iface, None, iface, 'default'),
                callable=handler,
                args = ('Views', 'provideView',
                        self.iface, None, iface, factory, 'default')
                )
                           )

        # register source type in WikiSourceTypeRegistry
        actions.append(Action(
            discriminator = ('zwiki source type', self.title, self.iface),
            callable=SourceTypes.provide,
            args = (self.title, self.iface)
            )
                       )
        
        return actions
        
    


=== Added File zopeproducts/zwiki/meta.zcml ===
<zopeConfigure xmlns='http://namespaces.zope.org/zope'>
  
  <directives namespace="http://namespaces.zope.org/wiki">

    <directive name="sourcetype" handler=".metaconfigure.sourcetype">

      <description>
        The renderers directive specifies how a particular source text can
        be rendered for various view types. It also generates a registry of
	available source types.
      </description>

      <attribute name="for" required="yes">
        <description>
          The for attribute specifies a marker interface for specifying the
	  particular source type. 
        </description>
      </attribute>

      <attribute name="title" required="yes">
        <description>
          Provides a title for the source type.
        </description>
      </attribute>

      <subdirective name="renderer">
        <description>
	  Register a renderer for a paricular output interface, such as
          IBrowserView.
        </description>

      	<attribute name="for" required="yes">
      	  <description>
	    Specifies the interface of the output type (i.e. browser) for
      	    which this view is being registered.
      	  </description>
      	</attribute>

      	<attribute name="factory" required="yes">
      	  <description>
            Specifies the factory that is used to create the view on the source.
      	  </description>
      	</attribute>

      </subdirective>

    </directive>

  </directives>

</zopeConfigure>