raw() can now be used to prevent escaping of attributes (#152)

dominate/dom_tag.py

@@ -355,8 +355,10 @@ def _render(self, sb, indent_level, indent_str, pretty, xhtml):
     sb.append(name)
 
     for attribute, value in sorted(self.attributes.items()):
-      if value is not False: # False values must be omitted completely
-          sb.append(' %s="%s"' % (attribute, util.escape(unicode(value), True)))
+      if value is False:
+        continue
+      val = unicode(value) if isinstance(value, util.text) and not value.escape else util.escape(unicode(value), True)
+      sb.append(' %s="%s"' % (attribute, val))
 
     sb.append(' />' if self.is_single and xhtml else '>')
 

dominate/util.py

@@ -168,6 +168,7 @@ class text(dom_tag):
 
   def __init__(self, _text, escape=True):
     super(text, self).__init__()
+    self.escape = escape
     if escape:
       self.text = str_escape(_text)
     else:

tests/test_html.py

@@ -1,6 +1,7 @@
 import dominate
 from dominate.tags import *
 import pytest
+from dominate.util import raw
 
 try:
   xrange = xrange
@@ -335,3 +336,10 @@ def test_xhtml():
 
   assert span('hi', br(), 'there').render(xhtml=False) == \
          '''<span>hi<br>there</span>'''
+
+
+def test_verbatim_attributes():
+  assert div(attr = '{<div></div>}').render() == \
+      '''<div attr="{&lt;div&gt;&lt;/div&gt;}"></div>'''
+  assert div(attr = raw('{<div></div>}')).render() == \
+      '''<div attr="{<div></div>}"></div>'''