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#! /usr/bin/env python2.6
# -*- coding: utf-8 -*-
attribute_names = dict(
httpEquiv='http-equiv',
className='class'
)
html_escapes = [(u'&', u'&'),
(u'>', u'>'),
(u'<', u'<'),
(u'"', u'"'),
(u"'", u''')]
def escape(string):
for (x, y) in html_escapes:
if x in string:
string = string.replace(x, y)
return string
class HtmlFragment():
def __init__(self):
self.children = []
def append_child(self, child):
self.children.append(child)
def _create_element(self, tag, attrs, separate_closing_tag=True):
result = HtmlElement(self.document(), tag, separate_closing_tag)
self._hookup_to_parent(result)
result.attr(**attrs)
return result
def html(self, **attrs):
return self._create_element(u'html', attrs)
def head(self, **attrs):
return self._create_element(u'head', attrs)
def body(self, **attrs):
return self._create_element(u'body', attrs)
def meta(self, **attrs):
return self._create_element(u'meta', attrs, False)
def link(self, **attrs):
return self._create_element(u'link', attrs, False)
def title(self, **attrs):
return self._create_element(u'title', attrs)
def script(self, **attrs):
return self._create_element(u'script', attrs)
def a(self, **attrs):
return self._create_element(u'a', attrs)
def p(self, **attrs):
return self._create_element(u'p', attrs)
def br(self, **attrs):
return self._create_element(u'br', attrs, False)
def ul(self, **attrs):
return self._create_element(u'ul', attrs)
def li(self, **attrs):
return self._create_element(u'li', attrs)
def iframe(self, **attrs):
return self._create_element(u'iframe', attrs)
def div(self, **attrs):
return self._create_element(u'div', attrs)
def span(self, **attrs):
return self._create_element(u'span', attrs)
def img(self, **attrs):
return self._create_element(u'img', attrs, False)
def text(self, txt):
result = HtmlText(txt)
self._hookup_to_parent(result)
return result
def innerhtml(self, html):
result = HtmlSource(html)
self._hookup_to_parent(result)
return result
def comment(self, txt):
result = HtmlComment(txt)
self._hookup_to_parent(result)
return result
# Utility functions
def meta_utf8(self):
self.meta(content='text/html, charset=utf-8', httpEquiv='Content-Type')
def favicon(self, href):
self.link(type='image/ico', rel='icon', href=href)
def css(self, href):
self.link(type='text/css', rel='stylesheet', href=href)
def java_script(self, src):
self.script(type='text/javascript', src=src)
def print_on(self, stream):
for child in self.children:
child.print_on(stream)
class HtmlDocument(HtmlFragment):
def __init__(self):
HtmlFragment.__init__(self)
self.stack = [self]
def document(self):
return self
def _hookup_to_parent(self, child):
self.document().stack[-1].append_child(child)
def print_on(self, stream):
print >>stream, '<!DOCTYPE html>'
HtmlFragment.print_on(self, stream)
def to_file(self, file_name):
import codecs
f = codecs.open(file_name, 'w', 'UTF-8')
self.print_on(f)
f.close()
class HtmlElement(HtmlFragment):
def __init__(self, document, tag, separate_closing_tag):
HtmlFragment.__init__(self)
self._document = document
self.tag = tag
self._separate_closing_tag = separate_closing_tag
def _hookup_to_parent(self, child):
self.append_child(child)
def document(self):
return self._document
# __enter__ and __exit__ enable use of 'with' statement
def __enter__(self):
self.document().stack.append(self)
return self
def __exit__(self, exc_type, exc_value, traceback):
self.document().stack.pop()
def attr(self, **kw):
self.attributes = kw
return self
def print_on(self, stream):
def attribute_key_to_string(k):
return attribute_names[k] if k in attribute_names else k
def attribute_to_string(kv):
return u'%s="%s"' % (attribute_key_to_string(kv[0]),
unicode(kv[1]))
def attributes_to_string(attrs):
if len(attrs):
return u' ' + u' '.join([attribute_to_string(kv)
for kv in attrs.items()])
else:
return u''
attributes_string = attributes_to_string(self.attributes)
if self._separate_closing_tag:
tag_open = u'<%s%s>' % (self.tag, attributes_string)
tag_close = u'</%s>' % self.tag
if len(self.children):
print >>stream, tag_open
HtmlFragment.print_on(self, stream)
print >>stream, tag_close
else:
print >>stream, tag_open + tag_close
else:
print >>stream, u'<%s%s/>' % (self.tag, attributes_string)
class HtmlText():
def __init__(self, txt):
self.text = txt
def print_on(self, stream):
print >>stream, escape(self.text)
class HtmlComment():
def __init__(self, txt):
if (txt.find('-->') != -1):
print >>sys.stderr, 'Unable to deal with \'-->\' in comment string.'
sys.exit(1)
self.text = txt
def print_on(self, stream):
print >>stream, '<!--', self.text, '-->'
class HtmlSource():
def __init__(self, txt):
self.text = txt
def print_on(self, stream):
print >>stream, self.text
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