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Allow easily ignoring the UI and non-element pseudo-selectors

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This commit is contained in:
Kovid Goyal 2015-02-21 10:26:19 +05:30
parent bd0313c357
commit 3420913923
1 changed files with 14 additions and 4 deletions
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14
src/css_selectors/select.py
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@ -78,6 +78,8 @@ def normalize_language_tag(tag):
taglist.add('-'.join(base_tag + tags))
return taglist
INAPPROPRIATE_PSEUDO_CLASSES = frozenset([
'active', 'after', 'disabled', 'visited', 'link', 'before', 'focus', 'first-letter', 'enabled', 'first-line', 'hover', 'checked', 'target'])
class Select(object):
@ -125,7 +127,7 @@ class Select(object):
'*=': 'substringmatch',
}
def __init__(self, root, default_lang=None, dispatch_map=None, trace=False):
def __init__(self, root, default_lang=None, ignore_inappropriate_pseudo_classes=False, dispatch_map=None, trace=False):
if hasattr(root, 'getroot'):
root = root.getroot()
self.root = root
@ -134,6 +136,10 @@ class Select(object):
self.default_lang = default_lang
if trace:
self.dispatch_map = {k:trace_wrapper(v) for k, v in self.dispatch_map.iteritems()}
if ignore_inappropriate_pseudo_classes:
self.ignore_inappropriate_pseudo_classes = INAPPROPRIATE_PSEUDO_CLASSES
else:
self.ignore_inappropriate_pseudo_classes = frozenset()
def invalidate_caches(self):
'Invalidate all caches. You must call this before using this object if you have made changes to the HTML tree'
@ -517,6 +523,10 @@ def select_pseudo(cache, pseudo):
yield cache.root
return
if pseudo.ident in cache.ignore_inappropriate_pseudo_classes:
def func(cache, item):
return True
else:
raise ExpressionError(
"The pseudo-class :%s is not supported" % pseudo.ident)
@ -571,4 +581,4 @@ if __name__ == '__main__':
from pprint import pprint
root = etree.fromstring('<body xmlns="xxx" xml:lang="en"><p id="p" class="one two" lang="fr"><a id="a"/><b/><c/><d/></p></body>')
select = Select(root, trace=True)
pprint(list(select('p')))
pprint(list(select('p:disabled')))