+
−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)