Файловый менеджер - Редактировать - /usr/lib/python2.7/site-packages/pip/_vendor/html5lib/treewalkers/base.py
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from __future__ import absolute_import, division, unicode_literals from xml.dom import Node from ..constants import namespaces, voidElements, spaceCharacters __all__ = ["DOCUMENT", "DOCTYPE", "TEXT", "ELEMENT", "COMMENT", "ENTITY", "UNKNOWN", "TreeWalker", "NonRecursiveTreeWalker"] DOCUMENT = Node.DOCUMENT_NODE DOCTYPE = Node.DOCUMENT_TYPE_NODE TEXT = Node.TEXT_NODE ELEMENT = Node.ELEMENT_NODE COMMENT = Node.COMMENT_NODE ENTITY = Node.ENTITY_NODE UNKNOWN = "<#UNKNOWN#>" spaceCharacters = "".join(spaceCharacters) class TreeWalker(object): def __init__(self, tree): self.tree = tree def __iter__(self): raise NotImplementedError def error(self, msg): return {"type": "SerializeError", "data": msg} def emptyTag(self, namespace, name, attrs, hasChildren=False): yield {"type": "EmptyTag", "name": name, "namespace": namespace, "data": attrs} if hasChildren: yield self.error("Void element has children") def startTag(self, namespace, name, attrs): return {"type": "StartTag", "name": name, "namespace": namespace, "data": attrs} def endTag(self, namespace, name): return {"type": "EndTag", "name": name, "namespace": namespace} def text(self, data): data = data middle = data.lstrip(spaceCharacters) left = data[:len(data) - len(middle)] if left: yield {"type": "SpaceCharacters", "data": left} data = middle middle = data.rstrip(spaceCharacters) right = data[len(middle):] if middle: yield {"type": "Characters", "data": middle} if right: yield {"type": "SpaceCharacters", "data": right} def comment(self, data): return {"type": "Comment", "data": data} def doctype(self, name, publicId=None, systemId=None): return {"type": "Doctype", "name": name, "publicId": publicId, "systemId": systemId} def entity(self, name): return {"type": "Entity", "name": name} def unknown(self, nodeType): return self.error("Unknown node type: " + nodeType) class NonRecursiveTreeWalker(TreeWalker): def getNodeDetails(self, node): raise NotImplementedError def getFirstChild(self, node): raise NotImplementedError def getNextSibling(self, node): raise NotImplementedError def getParentNode(self, node): raise NotImplementedError def __iter__(self): currentNode = self.tree while currentNode is not None: details = self.getNodeDetails(currentNode) type, details = details[0], details[1:] hasChildren = False if type == DOCTYPE: yield self.doctype(*details) elif type == TEXT: for token in self.text(*details): yield token elif type == ELEMENT: namespace, name, attributes, hasChildren = details if (not namespace or namespace == namespaces["html"]) and name in voidElements: for token in self.emptyTag(namespace, name, attributes, hasChildren): yield token hasChildren = False else: yield self.startTag(namespace, name, attributes) elif type == COMMENT: yield self.comment(details[0]) elif type == ENTITY: yield self.entity(details[0]) elif type == DOCUMENT: hasChildren = True else: yield self.unknown(details[0]) if hasChildren: firstChild = self.getFirstChild(currentNode) else: firstChild = None if firstChild is not None: currentNode = firstChild else: while currentNode is not None: details = self.getNodeDetails(currentNode) type, details = details[0], details[1:] if type == ELEMENT: namespace, name, attributes, hasChildren = details if (namespace and namespace != namespaces["html"]) or name not in voidElements: yield self.endTag(namespace, name) if self.tree is currentNode: currentNode = None break nextSibling = self.getNextSibling(currentNode) if nextSibling is not None: currentNode = nextSibling break else: currentNode = self.getParentNode(currentNode)
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