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web/views/xbel.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 22 Jun 2011 18:53:38 +0200
changeset 7553 935423529f45
parent 5877 0c7b7b76a84f
child 8035 f98012ec7c53
permissions -rw-r--r--
[datafeed cw parser] refactor: split logic that was in the parser into: * an "item builder" component, turning an etree xml node into a specific python dictionnary representing an entity * "action" components, selected given an entity, a relation and its role in the relation, and responsible to link the entity to given related items (eg dictionnary) This changes make it easy to add new action or to override existing one's behaviour according to the entity, the relation, etc... Also refactor the xml view so one can also override what's included in the tag used to mark the entity as used by a relation, hopefully allowing to reduce the number of http requests needed for a full datafeed import.

# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
#
# This file is part of CubicWeb.
#
# CubicWeb is free software: you can redistribute it and/or modify it under the
# terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 2.1 of the License, or (at your option)
# any later version.
#
# CubicWeb 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 Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License along
# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.
"""xbel views

"""
__docformat__ = "restructuredtext en"
_ = unicode

from logilab.mtconverter import xml_escape

from cubicweb.selectors import is_instance
from cubicweb.view import EntityView
from cubicweb.web.views.xmlrss import XMLView


class XbelView(XMLView):
    __regid__ = 'xbel'
    title = _('xbel')
    templatable = False
    content_type = 'text/xml' #application/xbel+xml

    def cell_call(self, row, col):
        self.wview('xbelitem', self.cw_rset, row=row, col=col)

    def call(self):
        """display a list of entities by calling their <item_vid> view"""
        self.w(u'<?xml version="1.0" encoding="%s"?>\n' % self._cw.encoding)
        self.w(u'<!DOCTYPE xbel PUBLIC "+//IDN python.org//DTD XML Bookmark Exchange Language 1.0//EN//XML" "http://www.python.org/topics/xml/dtds/xbel-1.0.dtd">')
        self.w(u'<xbel version="1.0">')
        self.w(u'<title>%s</title>' % self._cw._('bookmarks'))
        for i in xrange(self.cw_rset.rowcount):
            self.cell_call(i, 0)
        self.w(u"</xbel>")


class XbelItemView(EntityView):
    __regid__ = 'xbelitem'

    def cell_call(self, row, col):
        entity = self.cw_rset.complete_entity(row, col)
        self.w(u'<bookmark href="%s">' % xml_escape(self.url(entity)))
        self.w(u'  <title>%s</title>' % xml_escape(entity.dc_title()))
        self.w(u'</bookmark>')

    def url(self, entity):
        return entity.absolute_url()


class XbelItemBookmarkView(XbelItemView):
    __select__ = is_instance('Bookmark')

    def url(self, entity):
        return entity.actual_url()
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