Monkey patch DCWorkflowGraph to translate Workflow States/Transitions titles (Localizer).

Use IPAexGothic to make sure that Japanese is displayed properly. Also, make
sure that all the files are properly closed even if an exception occurs thanks
to 'with' and 'NamedTemporaryFile'.

product/ERP5Type/ZopePatch.py

@@ -74,6 +74,7 @@ from Products.ERP5Type.patches import zopecontenttype
 from Products.ERP5Type.patches import OFSImage
 from Products.ERP5Type.patches import _transaction
 from Products.ERP5Type.patches import default_zpublisher_encoding
+from Products.ERP5Type.patches import DCWorkflowGraph
 
 # These symbols are required for backward compatibility
 from Products.ERP5Type.patches.PropertyManager import ERP5PropertyManager

product/ERP5Type/patches/DCWorkflowGraph.py

+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# Copyright (c) 2013 panjunyong (panjy at zopen.cn, from ZOpen)
+#                    Nexedi SARL and Contributors. All Rights Reserved.
+#                    Arnaud Fontaine <arnaud.fontaine@nexedi.com>
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsability of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# garantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+def getObjectTitle(obj, REQUEST=None):
+  """
+  Get a state/transition title to be displayed in the graph.
+
+  Monkey-patched to support translation similar to what
+  Products.ERP5Type.Accessor.WorkflowState.TranslatedGetter does
+  """
+  if REQUEST is not None:
+    only_ids = REQUEST.get('only_ids', False)
+    translate = REQUEST.get('translate', False)
+  else:
+    only_ids = False
+    translate = False
+
+  _id = obj.getId()
+  title = obj.title
+  if not title or only_ids:
+    title = _id
+  else:
+    if translate:
+      # Translate the title in all supported Localizer languages
+      wf_id = obj.getWorkflow().id
+      localizer = obj.Localizer
+      original_title = title
+      for lang in localizer.get_supported_languages():
+        msg_id = '%s [state in %s]' % (title, wf_id)
+        translated_title = localizer.erp5_ui.gettext(
+          msg_id,
+          lang=lang,
+          # Fallback on non-workflow state translation
+          default=localizer.erp5_ui.gettext(original_title,
+                                            lang=lang,
+                                            default=None))
+
+        if (translated_title is not None and
+            translated_title != original_title):
+
+          title += "\\n%s" % translated_title
+
+    title += "\\n(%s)"% _id
+
+  return title
+
+from Products.DCWorkflowGraph import DCWorkflowGraph
+DCWorkflowGraph.getObjectTitle = getObjectTitle
+
+from Products.DCWorkflowGraph.config import bin_search_path, DOT_EXE
+from tempfile import NamedTemporaryFile
+from zLOG import LOG, WARNING
+
+def getGraph(self, wf_id="", format="png", REQUEST=None):
+  """show a workflow as a graph, copy from:
+"OpenFlowEditor":http://www.openflow.it/wwwopenflow/Download/OpenFlowEditor_0_4.tgz
+
+  Monkey-patched to specify font name and size as 'dot' uses Times font by
+  default which does not support Japanese:
+
+  http://www.graphviz.org/doc/fontfaq.txt
+
+  Another solution would be to modify fontconfig configuration so that Times
+  match Japanese font or to use Unifont which supports many code points.
+  """
+  try:
+    pot = DCWorkflowGraph.getPOT(self, wf_id, REQUEST)
+  except TypeError:
+    # DCWorkflowGraph < 0.4
+    pot = DCWorkflowGraph.getPOT(self, wf_id)
+  try:
+    encoding = self.portal_properties.site_properties.getProperty(
+      'default_charset', 'utf-8')
+  except AttributeError:
+    # no portal_properties or site_properties, fallback to:
+    encoding = self.management_page_charset.lower()
+  pot = pot.encode(encoding)
+  result = None
+  with NamedTemporaryFile(suffix='.dot') as infile:
+    infile.write(pot)
+    infile.seek(0)
+
+    if REQUEST is None:
+      REQUEST = self.REQUEST
+    response = REQUEST.RESPONSE
+
+    if format != 'dot':
+      with NamedTemporaryFile(suffix='.%s' % format) as outfile:
+        os.system('%s -Nfontname="IPAexGothic" -Nfontsize=10 '
+                  '-Efontname="IPAexGothic" -Efontsize=10 -T%s '
+                  '-o %s %s' % (DCWorkflowGraph.bin_search(DOT_EXE),
+                                format, outfile, infile))
+
+        result = outfile.read()
+
+      response.setHeader('Content-Type', 'image/%s' % format)
+    else:
+      result = infile.read()
+      filename = wf_id or self.getId()
+      response.setHeader('Content-Type', 'text/x-graphviz')
+      response.setHeader('Content-Disposition',
+                         'attachment; filename=%s.dot' % filename)
+
+  if not result:
+    LOG("ERP5Type.patches.DCWorkflowGraph", WARNING,
+        "Empty %s graph file" % format)
+
+  return result
+
+from Products.DCWorkflow.DCWorkflow import DCWorkflowDefinition
+DCWorkflowDefinition.getGraph = getGraph