[REF] refactor the code in order to split it in several file

mail_usability/models/tools.py

@@ -0,0 +1,45 @@
+# -*- coding: utf-8 -*-
+# Copyright 2018 Akretion (http://www.akretion.com).
+# @author Sébastien BEAU <sebastien.beau@akretion.com>
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo.tools.mail import _Cleaner
+import os
+import logging
+_logger = logging.getLogger(__name__)
+
+_Cleaner._style_whitelist += [
+    'word-wrap',
+    'display'
+    'border-top',
+    'border-bottom',
+    'border-left',
+    'border-right',
+    'text-transform',
+    ]
+
+
+if os.getenv('LOG_STYLE_SANITIZE'):
+    # Monkey patch the parse style method to debug
+    # the missing style
+    def parse_style(self, el):
+        attributes = el.attrib
+        styling = attributes.get('style')
+        if styling:
+            valid_styles = {}
+            styles = self._style_re.findall(styling)
+            for style in styles:
+                if style[0].lower() in self._style_whitelist:
+                    valid_styles[style[0].lower()] = style[1]
+                # START HACK
+                else:
+                    _logger.warning('Remove style %s %s', *style)
+                # END HACK
+            if valid_styles:
+                el.attrib['style'] = '; '.join(
+			'%s:%s' % (key, val)
+			for (key, val) in valid_styles.iteritems())
+            else:
+                del el.attrib['style']
+    import pdb; pdb.set_trace()
+    _Cleaner.parse_style = parse_style