Allow text-indent and text-align to be inherited.

setup.py

@@ -240,6 +240,12 @@ if sys.hexversion < 0x2050000:
     print >> sys.stderr, "If you are using easy_install, try easy_install-2.5"
     sys.exit(1)
     
+try:
+  from PIL import Image
+except ImportError:
+  import Image
+  print >>sys.stderr, "You do not have the Python Imaging Library correctly installed."
+  sys.exit(1)
 
 setup(
       name='libprs500', 

src/libprs500/lrf/html/convert_from.py

@@ -582,7 +582,6 @@ class HTMLConverter(object):
                 align = "foot"
             elif val == "center":
                 align = "center"
-            css.pop('text-align')
         if align != self.current_block.textStyle.attrs['align']:
             self.current_para.append_to(self.current_block)
             self.current_block.append_to(self.current_page)
@@ -616,14 +615,15 @@ class HTMLConverter(object):
                     print >>sys.stderr, err
         
     def sanctify_css(self, css):
-        """ Make css safe for use in a SPAM Xylog tag """
+        """ Return a copy of C{css} that is safe for use in a SPAM Xylog tag """
+        css = copy.copy(css)
         for key in css.keys():
             test = key.lower()
-            if test.startswith('margin') or \
+            if test.startswith('margin') or test.startswith('text') or \
                'padding' in test or 'border' in test or 'page-break' in test \
                or test.startswith('mso') or test.startswith('background')\
-               or test in ['color', 'display', 'text-decoration', \
-                           'letter-spacing', 'text-autospace', 'text-transform', 
+               or test in ['color', 'display', \
+                           'letter-spacing',  
                            'font-variant']:
                 css.pop(key)
         return css
@@ -867,7 +867,6 @@ class HTMLConverter(object):
             self.lstrip_toggle = True
             if tag_css.has_key('text-indent'):
                 indent = Span.unit_convert(tag_css['text-indent'])
-                tag_css.pop('text-indent')
                 if not indent:
                     indent=0
             else:

src/libprs500/lrf/html/demo/demo.html

@@ -4,7 +4,7 @@
 .toc { page-break-after: always; text-indent: 0em; }
 </style>
 </head>
-  <h1>Demo of <span style='font-family:monospace'>html2lrf</span></h1>
+  <h1>Demo of <span style='font-family:monospace'>html2lrf</span></h1>  
   <p>
   This file contains a demonstration of the capabilities of   <span style='font-family:monospace'>html2lrf,</span>   the HTML to LRF converter   from <em>libprs500.</em> To obtain libprs500 visit  <span style='font:sans-serif'>https://libprs500.kovidgoyal.net</span>
   </p>
@@ -70,7 +70,7 @@
 
  <h2><a name='images'>Inline images</a></h2>
  <p>
- Here I demonstrate the use of inline images in the midst of text. Here is a  small image <img src='small.jpg' /> embedded in a sentence. Now we have a  slightly larger image that is automatically put in its own block  <img src='medium.jpg' /> and finally we have a large image which is  automatically placed on a page by itself and prevented from being  autoscaled when the user changes from S to M to L. Try changing sizes  and see how the different embedding styles behave.  <img src='large.jpg' />
+ Here I demonstrate the use of inline images in the midst of text. Here is a  small image <img src='small.jpg' /> embedded in a sentence. Now we have a  slightly larger image that is automatically put in its own block  <img style="text-align:center" src='medium.jpg' /> and finally we have a large image which is  automatically placed on a page by itself and prevented from being  autoscaled when the user changes from S to M to L. Try changing sizes  and see how the different embedding styles behave.  <img src='large.jpg' />
  </p>
 <p class='toc'>
  <hr />