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from __future__ import unicode_literals
import cgi
class HtmlWriter(object):
def __init__(self):
self._fragments = []
def text(self, text):
self._fragments.append(_escape_html(text))
def start(self, name, attributes=None):
attribute_string = _generate_attribute_string(attributes)
self._fragments.append("<{0}{1}>".format(name, attribute_string))
def end(self, name):
self._fragments.append("</{0}>".format(name))
def self_closing(self, name, attributes=None):
attribute_string = _generate_attribute_string(attributes)
self._fragments.append("<{0}{1} />".format(name, attribute_string))
def append(self, html):
self._fragments.append(html)
def as_string(self):
return "".join(self._fragments)
def _escape_html(text):
return cgi.escape(text, quote=True)
def _generate_attribute_string(attributes):
if attributes is None:
return ""
else:
return "".join(
' {0}="{1}"'.format(key, _escape_html(attributes[key]))
for key in sorted(attributes)
)
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