--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/app/django/forms/util.py	Tue Oct 14 16:00:59 2008 +0000
@@ -0,0 +1,68 @@
+from django.utils.html import conditional_escape
+from django.utils.encoding import smart_unicode, StrAndUnicode, force_unicode
+from django.utils.safestring import mark_safe
+
+def flatatt(attrs):
+    """
+    Convert a dictionary of attributes to a single string.
+    The returned string will contain a leading space followed by key="value",
+    XML-style pairs.  It is assumed that the keys do not need to be XML-escaped.
+    If the passed dictionary is empty, then return an empty string.
+    """
+    return u''.join([u' %s="%s"' % (k, conditional_escape(v)) for k, v in attrs.items()])
+
+class ErrorDict(dict, StrAndUnicode):
+    """
+    A collection of errors that knows how to display itself in various formats.
+
+    The dictionary keys are the field names, and the values are the errors.
+    """
+    def __unicode__(self):
+        return self.as_ul()
+
+    def as_ul(self):
+        if not self: return u''
+        return mark_safe(u'<ul class="errorlist">%s</ul>'
+                % ''.join([u'<li>%s%s</li>' % (k, force_unicode(v))
+                    for k, v in self.items()]))
+
+    def as_text(self):
+        return u'\n'.join([u'* %s\n%s' % (k, u'\n'.join([u'  * %s' % force_unicode(i) for i in v])) for k, v in self.items()])
+
+class ErrorList(list, StrAndUnicode):
+    """
+    A collection of errors that knows how to display itself in various formats.
+    """
+    def __unicode__(self):
+        return self.as_ul()
+
+    def as_ul(self):
+        if not self: return u''
+        return mark_safe(u'<ul class="errorlist">%s</ul>'
+                % ''.join([u'<li>%s</li>' % force_unicode(e) for e in self]))
+
+    def as_text(self):
+        if not self: return u''
+        return u'\n'.join([u'* %s' % force_unicode(e) for e in self])
+
+    def __repr__(self):
+        return repr([force_unicode(e) for e in self])
+
+class ValidationError(Exception):
+    def __init__(self, message):
+        """
+        ValidationError can be passed any object that can be printed (usually
+        a string) or a list of objects.
+        """
+        if isinstance(message, list):
+            self.messages = ErrorList([smart_unicode(msg) for msg in message])
+        else:
+            message = smart_unicode(message)
+            self.messages = ErrorList([message])
+
+    def __str__(self):
+        # This is needed because, without a __str__(), printing an exception
+        # instance would result in this:
+        # AttributeError: ValidationError instance has no attribute 'args'
+        # See http://www.python.org/doc/current/tut/node10.html#handling
+        return repr(self.messages)