diff options
Diffstat (limited to 'jython-tosca-parser/src/main/resources/Lib/site-packages/pip/_vendor/html5lib/treewalkers/lxmletree.py')
| -rw-r--r-- | jython-tosca-parser/src/main/resources/Lib/site-packages/pip/_vendor/html5lib/treewalkers/lxmletree.py | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/jython-tosca-parser/src/main/resources/Lib/site-packages/pip/_vendor/html5lib/treewalkers/lxmletree.py b/jython-tosca-parser/src/main/resources/Lib/site-packages/pip/_vendor/html5lib/treewalkers/lxmletree.py new file mode 100644 index 0000000..4373383 --- /dev/null +++ b/jython-tosca-parser/src/main/resources/Lib/site-packages/pip/_vendor/html5lib/treewalkers/lxmletree.py @@ -0,0 +1,208 @@ +from __future__ import absolute_import, division, unicode_literals +from pip._vendor.six import text_type + +from lxml import etree +from ..treebuilders.etree import tag_regexp + +from gettext import gettext +_ = gettext + +from . import _base + +from .. import ihatexml + + +def ensure_str(s): + if s is None: + return None + elif isinstance(s, text_type): + return s + else: + return s.decode("utf-8", "strict") + + +class Root(object): + def __init__(self, et): + self.elementtree = et + self.children = [] + if et.docinfo.internalDTD: + self.children.append(Doctype(self, + ensure_str(et.docinfo.root_name), + ensure_str(et.docinfo.public_id), + ensure_str(et.docinfo.system_url))) + root = et.getroot() + node = root + + while node.getprevious() is not None: + node = node.getprevious() + while node is not None: + self.children.append(node) + node = node.getnext() + + self.text = None + self.tail = None + + def __getitem__(self, key): + return self.children[key] + + def getnext(self): + return None + + def __len__(self): + return 1 + + +class Doctype(object): + def __init__(self, root_node, name, public_id, system_id): + self.root_node = root_node + self.name = name + self.public_id = public_id + self.system_id = system_id + + self.text = None + self.tail = None + + def getnext(self): + return self.root_node.children[1] + + +class FragmentRoot(Root): + def __init__(self, children): + self.children = [FragmentWrapper(self, child) for child in children] + self.text = self.tail = None + + def getnext(self): + return None + + +class FragmentWrapper(object): + def __init__(self, fragment_root, obj): + self.root_node = fragment_root + self.obj = obj + if hasattr(self.obj, 'text'): + self.text = ensure_str(self.obj.text) + else: + self.text = None + if hasattr(self.obj, 'tail'): + self.tail = ensure_str(self.obj.tail) + else: + self.tail = None + self.isstring = isinstance(obj, str) or isinstance(obj, bytes) + # Support for bytes here is Py2 + if self.isstring: + self.obj = ensure_str(self.obj) + + def __getattr__(self, name): + return getattr(self.obj, name) + + def getnext(self): + siblings = self.root_node.children + idx = siblings.index(self) + if idx < len(siblings) - 1: + return siblings[idx + 1] + else: + return None + + def __getitem__(self, key): + return self.obj[key] + + def __bool__(self): + return bool(self.obj) + + def getparent(self): + return None + + def __str__(self): + return str(self.obj) + + def __unicode__(self): + return str(self.obj) + + def __len__(self): + return len(self.obj) + + +class TreeWalker(_base.NonRecursiveTreeWalker): + def __init__(self, tree): + if hasattr(tree, "getroot"): + tree = Root(tree) + elif isinstance(tree, list): + tree = FragmentRoot(tree) + _base.NonRecursiveTreeWalker.__init__(self, tree) + self.filter = ihatexml.InfosetFilter() + + def getNodeDetails(self, node): + if isinstance(node, tuple): # Text node + node, key = node + assert key in ("text", "tail"), _("Text nodes are text or tail, found %s") % key + return _base.TEXT, ensure_str(getattr(node, key)) + + elif isinstance(node, Root): + return (_base.DOCUMENT,) + + elif isinstance(node, Doctype): + return _base.DOCTYPE, node.name, node.public_id, node.system_id + + elif isinstance(node, FragmentWrapper) and node.isstring: + return _base.TEXT, node.obj + + elif node.tag == etree.Comment: + return _base.COMMENT, ensure_str(node.text) + + elif node.tag == etree.Entity: + return _base.ENTITY, ensure_str(node.text)[1:-1] # strip &; + + else: + # This is assumed to be an ordinary element + match = tag_regexp.match(ensure_str(node.tag)) + if match: + namespace, tag = match.groups() + else: + namespace = None + tag = ensure_str(node.tag) + attrs = {} + for name, value in list(node.attrib.items()): + name = ensure_str(name) + value = ensure_str(value) + match = tag_regexp.match(name) + if match: + attrs[(match.group(1), match.group(2))] = value + else: + attrs[(None, name)] = value + return (_base.ELEMENT, namespace, self.filter.fromXmlName(tag), + attrs, len(node) > 0 or node.text) + + def getFirstChild(self, node): + assert not isinstance(node, tuple), _("Text nodes have no children") + + assert len(node) or node.text, "Node has no children" + if node.text: + return (node, "text") + else: + return node[0] + + def getNextSibling(self, node): + if isinstance(node, tuple): # Text node + node, key = node + assert key in ("text", "tail"), _("Text nodes are text or tail, found %s") % key + if key == "text": + # XXX: we cannot use a "bool(node) and node[0] or None" construct here + # because node[0] might evaluate to False if it has no child element + if len(node): + return node[0] + else: + return None + else: # tail + return node.getnext() + + return (node, "tail") if node.tail else node.getnext() + + def getParentNode(self, node): + if isinstance(node, tuple): # Text node + node, key = node + assert key in ("text", "tail"), _("Text nodes are text or tail, found %s") % key + if key == "text": + return node + # else: fallback to "normal" processing + + return node.getparent() |