/usr/lib/python2.7/dist-packages/html5lib/treewalkers/base.py is in python-html5lib 0.999999999-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 | 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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