def __contains__(self, path):
if len(path) >= 2:
node = path[-1]
return isinstance(node, xsc.Element) and _is_nth_last_node(
misc.Iterator(_children_of_type(path[-2], node.xmlname)), node,
1)
return False
def test_iterator_getitem():
e = misc.Iterator(iter(range(10)))
assert e[0] == 0
assert e[0] == 1
assert e[-1] == 9
with pytest.raises(IndexError):
e[-1]
def __contains__(self, path):
if len(path) >= 2:
node = path[-1]
if isinstance(node, xsc.Element):
return _is_nth_node(
misc.Iterator(_children_of_type(path[-2], node.xmlname)),
node, self.value)
return False
def iterrules(node, base=None, media=None, title=None):
"""
Return an iterator for all CSS rules defined in the HTML tree :obj:`node`.
This will parse the CSS defined in any :class:`html.style` or
:class:`html.link` element (and recursively in those stylesheets imported
via the ``@import`` rule). The rules will be returned as
:class:`CSSStyleRule` objects from the :mod:`cssutils` package (so this
requires :mod:`cssutils`).
The :obj:`base` argument will be used as the base URL for parsing the
stylesheet references in the tree (so :const:`None` means the URLs will be
used exactly as they appear in the tree). All URLs in the style properties
will be resolved.
If :obj:`media` is given, only rules that apply to this media type will
be produced.
:obj:`title` can be used to specify which stylesheet group should be used.
If :obj:`title` is :const:`None` only the persistent and preferred
stylesheets will be used. If :obj:`title` is a string only the persistent
stylesheets and alternate stylesheets with that style name will be used.
For a description of "persistent", "preferred" and "alternate" stylesheets
see <http://www.w3.org/TR/2002/WD-xhtml2-20020805/mod-styleSheet.html#sec_20.1.2.>
"""
if base is not None:
base = url.URL(base)
def matchlink(node):
if node.attrs.media.hasmedia(media):
if title is None:
if "title" not in node.attrs and "alternate" not in str(
node.attrs.rel).split():
return True
elif not node.attrs.title.isfancy() and str(
node.attrs.title) == title and "alternate" in str(
node.attrs.rel).split():
return True
return False
def matchstyle(node):
if node.attrs.media.hasmedia(media):
if title is None:
if "title" not in node.attrs:
return True
elif str(node.attrs.title) == title:
return True
return False
def doiter(node):
for cssnode in node.walknodes(_isstyle):
if isinstance(cssnode, html.style):
href = str(base) if base is not None else None
if matchstyle(cssnode):
stylesheet = cssutils.parseString(str(cssnode.content),
href=href,
media=str(
cssnode.attrs.media))
yield from _doimport(media, stylesheet, base)
else: # link
if "href" in cssnode.attrs:
href = cssnode.attrs.href.asURL()
if base is not None:
href = base / href
if matchlink(cssnode):
stylesheet = cssutils.parseUrl(
str(href), media=str(cssnode.attrs.media))
yield from _doimport(media, stylesheet, href)
return misc.Iterator(doiter(node))
def test_iterator_next():
e = misc.Iterator(iter(range(2)))
assert next(e) == 0
assert next(e) == 1
with pytest.raises(StopIteration):
next(e)
def test_iterator_bool():
e = misc.Iterator(iter(range(10)))
assert e
e = misc.Iterator(iter([]))
assert not e