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61 lines
2.4 KiB
Python
61 lines
2.4 KiB
Python
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import re
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import gettext
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_ = gettext.gettext
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from BeautifulSoup import BeautifulSoup, Declaration, Comment, Tag
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from html5lib.constants import namespaces
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import _base
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class TreeWalker(_base.NonRecursiveTreeWalker):
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doctype_regexp = re.compile(
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r'DOCTYPE\s+(?P<name>[^\s]*)(\s*PUBLIC\s*"(?P<publicId>.*)"\s*"(?P<systemId1>.*)"|\s*SYSTEM\s*"(?P<systemId2>.*)")?')
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def getNodeDetails(self, node):
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if isinstance(node, BeautifulSoup): # Document or DocumentFragment
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return (_base.DOCUMENT,)
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elif isinstance(node, Declaration): # DocumentType
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string = unicode(node.string)
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#Slice needed to remove markup added during unicode conversion,
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#but only in some versions of BeautifulSoup/Python
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if string.startswith('<!') and string.endswith('>'):
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string = string[2:-1]
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m = self.doctype_regexp.match(string)
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#This regexp approach seems wrong and fragile
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#but beautiful soup stores the doctype as a single thing and we want the seperate bits
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#It should work as long as the tree is created by html5lib itself but may be wrong if it's
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#been modified at all
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#We could just feed to it a html5lib tokenizer, I guess...
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assert m is not None, "DOCTYPE did not match expected format"
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name = m.group('name')
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publicId = m.group('publicId')
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if publicId is not None:
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systemId = m.group('systemId1')
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else:
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systemId = m.group('systemId2')
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return _base.DOCTYPE, name, publicId or "", systemId or ""
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elif isinstance(node, Comment):
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string = unicode(node.string)
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if string.startswith('<!--') and string.endswith('-->'):
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string = string[4:-3]
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return _base.COMMENT, string
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elif isinstance(node, unicode): # TextNode
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return _base.TEXT, node
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elif isinstance(node, Tag): # Element
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return (_base.ELEMENT, namespaces["html"], node.name,
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dict(node.attrs).items(), node.contents)
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else:
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return _base.UNKNOWN, node.__class__.__name__
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def getFirstChild(self, node):
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return node.contents[0]
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def getNextSibling(self, node):
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return node.nextSibling
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def getParentNode(self, node):
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return node.parent
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