[breadcrumbs] Small breadcrumb components refactoring
* use `open_breadcrumbs` and `close_breadcrumbs` methods where applicable in
the BreadCrumbEntityVComponent hierarchy
* include the first separator related code in `open_breadcrumbs` to avoid code
duplication
Closes #3223911.
# 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/>.
"""some basic stuff to build dot generated graph images"""
__docformat__ = "restructuredtext en"
_ = unicode
import tempfile
import os
import codecs
from logilab.mtconverter import xml_escape
from logilab.common.graph import GraphGenerator, DotBackend
from cubicweb.view import EntityView
from cubicweb.utils import make_uid
class DotGraphView(EntityView):
__abstract__ = True
backend_class = DotBackend
backend_kwargs = {'ratio': 'compress', 'size': '30,10'}
def cell_call(self, row, col):
if 'MSIE 8' in self._cw.useragent():
return
entity = self.cw_rset.get_entity(row, col)
visitor = self.build_visitor(entity)
prophdlr = self.build_dotpropshandler()
graphname = 'dotgraph%s' % str(entity.eid)
generator = GraphGenerator(self.backend_class(graphname, None,
**self.backend_kwargs))
# image file
fd, tmpfile = tempfile.mkstemp('.svg')
os.close(fd)
generator.generate(visitor, prophdlr, tmpfile)
with codecs.open(tmpfile, 'rb', encoding='utf-8') as svgfile:
self.w(svgfile.read())
def build_visitor(self, entity):
raise NotImplementedError
def build_dotpropshandler(self):
return DotPropsHandler(self._cw)
class DotPropsHandler(object):
def __init__(self, req):
self._ = req._
def node_properties(self, entity):
"""return default DOT drawing options for a state or transition"""
return {'label': entity.dc_long_title(),
'href': entity.absolute_url(),
'fontname': 'Courier', 'fontsize': 10, 'shape':'box',
}
def edge_properties(self, transition, fromstate, tostate):
return {'label': '', 'dir': 'forward',
'color': 'black', 'style': 'filled'}