From 439b8c0f213d3b27888086b67619198c0722705f Mon Sep 17 00:00:00 2001
From: ldolse <ldolse@yahoo.com>
Date: Fri, 7 Jan 2011 03:40:47 +0800
Subject: [PATCH] delete microsoft smart tags during preprocess

---
 src/calibre/ebooks/conversion/utils.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/calibre/ebooks/conversion/utils.py b/src/calibre/ebooks/conversion/utils.py
index 6d2d123b10..4bb96ac088 100644
--- a/src/calibre/ebooks/conversion/utils.py
+++ b/src/calibre/ebooks/conversion/utils.py
@@ -234,8 +234,11 @@ class PreProcessor(object):
             self.log("replaced "+unicode(self.found_indents)+ " nbsp indents with inline styles")
         # remove remaining non-breaking spaces
         html = re.sub(ur'\u00a0', ' ', html)
+        # Get rid of various common microsoft specific tags which can cause issues later
         # Get rid of empty <o:p> tags to simplify other processing
         html = re.sub(ur'\s*<o:p>\s*</o:p>', ' ', html)
+        # Delete microsoft 'smart' tags
+        html = re.sub('(?i)</?st1:\w+>', '', html)
         # Get rid of empty span, bold, & italics tags
         html = re.sub(r"\s*<span[^>]*>\s*(<span[^>]*>\s*</span>){0,2}\s*</span>\s*", " ", html)
         html = re.sub(r"\s*<[ibu][^>]*>\s*(<[ibu][^>]*>\s*</[ibu]>\s*){0,2}\s*</[ibu]>", " ", html)