Source Code for Module reflectometry.model1d.profileview.xmlescape

 1  """ 
 2  History: 
 3   
 4  Author xmlescape:   Gabriel Genellina 
 5  Author xmlunescape: Leif K-Brooks, based on work by Aaron Swartz 
 6  Source http://www.thescripts.com/forum/thread594350.html 
 7   
 8  Modified by Paul Kienzle 
 9  """ 
10   
11  #Escape special xml characters in a text string 
12   
13  from htmlentitydefs import codepoint2name,name2codepoint 
14  import re 
15   
16  unichr2entity = dict((unichr(code),u'&%s;'%name) 
17      for code,name in codepoint2name.iteritems() if code !=38) 
18   
19   
20 -def xmlescape(text,d=unichr2entity): 
21      """xmlstr = xmlescape(str) 
22      Convert text into a form suitable for inclusion in an XML file, 
23      with characters such as '&' replaced by & 
24      """ 
25      if u"&"in text: 
26          text = text.replace(u"&",u"&") 
27      for key,value in d.iteritems(): 
28          if key in text: 
29              text = text.replace(key,value) 
30      return text 
31   
32   
33 -def _replace_entity(m): 
34      """regular expression character replacement function for xmlunescape. 
35      """ 
36      s = m.group(1) 
37      if s[0] == u'#': 
38          s = s[1:] 
39          try: 
40              if s[0] in u'xX': 
41                  c = int(s[1:], 16) 
42              else: 
43                  c = int(s) 
44              return unichr(c) 
45          except ValueError: 
46              return m.group(0) 
47      else: 
48          try: 
49              return unichr(name2codepoint[s]) 
50          except (ValueError, KeyError): 
51              return m.group(0) 
52   
53   
54  _entity_re = re.compile(r"&(#?[xX]?(?:[0-9a-fA-F]+|\w{1,8}));") 
55 -def xmlunescape(s): 
56      """str = xmlunescape(xmlstr) 
57      Replace XML entities with original ISO characters. 
58      """ 
59      return _entity_re.sub(_replace_entity, s) 
60   
61   
62  if __name__ == "__main__": 
63      s = "<>&;" 
64      xmls = xmlescape(s) 
65      uns = xmlunescape(xmls) 
66      print "%s => %s => %s"%(s,xmls,uns) 
67