slugify report filename

This ensure that the file name will always work on any file-system.

issue3497
review1511002

tryton/action/main.py

@@ -9,7 +9,7 @@ import tempfile
 import os
 import webbrowser
 from tryton.pyson import PYSONEncoder
-from tryton.common import RPCProgress, RPCExecute, RPCException
+from tryton.common import RPCProgress, RPCExecute, RPCException, slugify
 
 _ = gettext.gettext
 
@@ -40,10 +40,9 @@ class Action(object):
         if not print_p and direct_print:
             print_p = True
         dtemp = tempfile.mkdtemp(prefix='tryton_')
+
         fp_name = os.path.join(dtemp,
-            name.replace(os.sep, '_').replace(os.altsep or os.sep, '_')
-            + os.extsep
-            + type.replace(os.sep, '_').replace(os.altsep or os.sep, '_'))
+            slugify(name) + os.extsep + slugify(type))
         with open(fp_name, 'wb') as file_d:
             file_d.write(data)
         if email_print:

tryton/common/common.py

@@ -10,6 +10,7 @@ import os
 import subprocess
 import re
 import logging
+import unicodedata
 from functools import partial
 from tryton.config import CONFIG
 from tryton.config import TRYTON_ICON, PIXMAPS_DIR
@@ -490,6 +491,18 @@ def file_selection(title, filename='',
         return filenames
 
 
+_slugify_strip_re = re.compile(r'[^\w\s-]')
+_slugify_hyphenate_re = re.compile(r'[-\s]+')
+
+
+def slugify(value):
+    if not isinstance(value, unicode):
+        value = unicode(value)
+    value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore')
+    value = unicode(_slugify_strip_re.sub('', value).strip().lower())
+    return _slugify_hyphenate_re.sub('-', value)
+
+
 def file_open(filename, type, print_p=False):
     def save():
         save_name = file_selection(_('Save As...'),