--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/cubicweb/web/views/dotgraphview.py Sat Jan 16 13:48:51 2016 +0100
@@ -0,0 +1,74 @@
+# 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"
+from cubicweb import _
+
+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'}