move _guessEncoding as a class method, and change a bit docstring, as it's no

longer an EmailDocument method.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@25939 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/Document.py

@@ -1273,15 +1273,10 @@ class Document(PermanentURLMixIn, XMLObject, UrlMixIn, ConversionCacheMixin, Sna
     mime, html = self.convert(**kw)
     return self._stripHTML(str(html))
 
-  def _stripHTML(self, html, charset=None):
-    """
-      A private method which can be reused by subclasses
-      to strip HTML content
-    """
   def _guessEncoding(self, string):
     """
-        Some Email Clients indicate wrong encoding
-        This method try to guess which encoding is used.
+      Try to guess the encoding for this string.
+      Returns None if no encoding can be guessed.
     """
     try:
       import chardet
@@ -1289,6 +1284,11 @@ class Document(PermanentURLMixIn, XMLObject, UrlMixIn, ConversionCacheMixin, Sna
       return None
     return chardet.detect(string).get('encoding', None)
 
+  def _stripHTML(self, html, charset=None):
+    """
+      A private method which can be reused by subclasses
+      to strip HTML content
+    """
     body_list = re.findall(self.body_parser, str(html))
     if len(body_list):
       stripped_html = body_list[0]