60 lines
1.9 KiB
Python
60 lines
1.9 KiB
Python
from __future__ import absolute_import
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from django.core.exceptions import ImproperlyConfigured
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from django.utils.encoding import smart_text
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from compressor.exceptions import ParserError
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from compressor.parser import ParserBase
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from compressor.utils.decorators import cached_property
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class Html5LibParser(ParserBase):
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def __init__(self, content):
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super(Html5LibParser, self).__init__(content)
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import html5lib
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self.html5lib = html5lib
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def _serialize(self, elem):
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return self.html5lib.serialize(
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elem, tree="etree", quote_attr_values=True,
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omit_optional_tags=False, use_trailing_solidus=True,
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)
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def _find(self, *names):
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for elem in self.html:
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if elem.tag in names:
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yield elem
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@cached_property
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def html(self):
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try:
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return self.html5lib.parseFragment(self.content, treebuilder="etree")
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except ImportError as err:
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raise ImproperlyConfigured("Error while importing html5lib: %s" % err)
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except Exception as err:
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raise ParserError("Error while initializing Parser: %s" % err)
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def css_elems(self):
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return self._find('{http://www.w3.org/1999/xhtml}link',
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'{http://www.w3.org/1999/xhtml}style')
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def js_elems(self):
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return self._find('{http://www.w3.org/1999/xhtml}script')
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def elem_attribs(self, elem):
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return elem.attrib
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def elem_content(self, elem):
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return smart_text(elem.text)
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def elem_name(self, elem):
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if '}' in elem.tag:
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return elem.tag.split('}')[1]
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return elem.tag
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def elem_str(self, elem):
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# This method serializes HTML in a way that does not pass all tests.
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# However, this method is only called in tests anyway, so it doesn't
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# really matter.
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return smart_text(self._serialize(elem))
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