blob: fca65ecbeac9ae0f7ea3eba372f73b56598f0533 [file] [log] [blame]
import re
import gettext
_ = gettext.gettext
from BeautifulSoup import BeautifulSoup, Declaration, Comment, Tag
from html5lib.constants import namespaces
import _base
class TreeWalker(_base.NonRecursiveTreeWalker):
doctype_regexp = re.compile(
r'DOCTYPE\s+(?P<name>[^\s]*)(\s*PUBLIC\s*"(?P<publicId>.*)"\s*"(?P<systemId1>.*)"|\s*SYSTEM\s*"(?P<systemId2>.*)")?')
def getNodeDetails(self, node):
if isinstance(node, BeautifulSoup): # Document or DocumentFragment
return (_base.DOCUMENT,)
elif isinstance(node, Declaration): # DocumentType
string = unicode(node.string)
#Slice needed to remove markup added during unicode conversion,
#but only in some versions of BeautifulSoup/Python
if string.startswith('<!') and string.endswith('>'):
string = string[2:-1]
m = self.doctype_regexp.match(string)
#This regexp approach seems wrong and fragile
#but beautiful soup stores the doctype as a single thing and we want the seperate bits
#It should work as long as the tree is created by html5lib itself but may be wrong if it's
#been modified at all
#We could just feed to it a html5lib tokenizer, I guess...
assert m is not None, "DOCTYPE did not match expected format"
name = m.group('name')
publicId = m.group('publicId')
if publicId is not None:
systemId = m.group('systemId1')
else:
systemId = m.group('systemId2')
return _base.DOCTYPE, name, publicId or "", systemId or ""
elif isinstance(node, Comment):
string = unicode(node.string)
if string.startswith('<!--') and string.endswith('-->'):
string = string[4:-3]
return _base.COMMENT, string
elif isinstance(node, unicode): # TextNode
return _base.TEXT, node
elif isinstance(node, Tag): # Element
return (_base.ELEMENT, namespaces["html"], node.name,
dict(node.attrs).items(), node.contents)
else:
return _base.UNKNOWN, node.__class__.__name__
def getFirstChild(self, node):
return node.contents[0]
def getNextSibling(self, node):
return node.nextSibling
def getParentNode(self, node):
return node.parent