SpanWidget

widgets.py

class SpanWidget(forms.Widget):
    """
    Renders a value wrapped in a <span> tag.
    Based on Killarny, http://www.djangosnippets.org/snippets/1340/
    Modified to place the value in a hidden control, so that it
    returns a value in the GET/POST response.
    """
    def __init__(self, attrs=None, choices=(), url=False):
        super(SpanWidget, self).__init__(attrs=attrs)
        self.url = url
        self.choices = list(choices)

    def get_hidden(self, name, value):
        return "<input type='hidden' name='%s' value='%s' />" \
                 % (name, escape(value).replace('\n','&#10;').replace('\r','&#13;'))

    def get_render_value(self, value):
        render_value = value
        if self.choices:
            render_value = dict(self.choices).get(value, '')
        return render_value

    def render(self, name, value, attrs=None):
        final_attrs = self.build_attrs(attrs, name=name)
        render_value = self.get_render_value(value)
        if hasattr(value, 'url'):
            return mark_safe(u"<span%s><a href='%s'>%s</a></span>" % (
                    forms.util.flatatt(final_attrs),
                    escape(striptags(unicode(value.url))),
                    escape(striptags(unicode(value.name.rsplit('/', 1)[1]))),
            ))
        hidden = self.get_hidden(name, value)
        return mark_safe(u"<span%s>%s%s</span>" % (
                forms.util.flatatt(final_attrs),
                escape(striptags(unicode(render_value))),
                hidden))


class URLSpanWidget(SpanWidget):
    def render(self, name, value, attrs=None):
        final_attrs = self.build_attrs(attrs, name=name)
        render_value = self.get_render_value(value)
        hidden = self.get_hidden(name, value)

        render_value = value[:55]
        if render_value != value:
            render_value += "..."
        return mark_safe(u"<span%s><a href='%s'>%s%s</a></span>" % (
                forms.util.flatatt(final_attrs),
                escape(striptags(unicode(value))),
                escape(striptags(unicode(render_value))),
                hidden,
        ))