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/opt/alt/python37/lib/python3.7/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):
    """Walks a tree yielding tokens

Tokens are dicts that all have a ``type`` field specifying the type of the
    token.

"""
    def __init__(self, tree):
        """Creates a TreeWalker

:arg tree: the tree to walk

"""
        self.tree = tree

def __iter__(self):
        raise NotImplementedError

def error(self, msg):
        """Generates an error token with the given message

:arg msg: the error message

:returns: SerializeError token

"""
        return {"type": "SerializeError", "data": msg}

def emptyTag(self, namespace, name, attrs, hasChildren=False):
        """Generates an EmptyTag token

:arg namespace: the namespace of the token--can be ``None``

:arg name: the name of the element

:arg attrs: the attributes of the element as a dict

:arg hasChildren: whether or not to yield a SerializationError because
            this tag shouldn't have children

:returns: EmptyTag token

"""
        yield {"type": "EmptyTag", "name": name,
               "namespace": namespace,
               "data": attrs}
        if hasChildren:
            yield self.error("Void element has children")

def startTag(self, namespace, name, attrs):
        """Generates a StartTag token

:arg namespace: the namespace of the token--can be ``None``

:arg name: the name of the element

:arg attrs: the attributes of the element as a dict

:returns: StartTag token

"""
        return {"type": "StartTag",
                "name": name,
                "namespace": namespace,
                "data": attrs}

def endTag(self, namespace, name):
        """Generates an EndTag token

:arg namespace: the namespace of the token--can be ``None``

:arg name: the name of the element

:returns: EndTag token

"""
        return {"type": "EndTag",
                "name": name,
                "namespace": namespace}

def text(self, data):
        """Generates SpaceCharacters and Characters tokens

Depending on what's in the data, this generates one or more
        ``SpaceCharacters`` and ``Characters`` tokens.

For example:

>>> from html5lib.treewalkers.base import TreeWalker
            >>> # Give it an empty tree just so it instantiates
            >>> walker = TreeWalker([])
            >>> list(walker.text(''))
            []
            >>> list(walker.text('  '))
            [{u'data': '  ', u'type': u'SpaceCharacters'}]
            >>> list(walker.text(' abc '))  # doctest: +NORMALIZE_WHITESPACE
            [{u'data': ' ', u'type': u'SpaceCharacters'},
            {u'data': u'abc', u'type': u'Characters'},
            {u'data': u' ', u'type': u'SpaceCharacters'}]

:arg data: the text data

:returns: one or more ``SpaceCharacters`` and ``Characters`` tokens

"""
        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):
        """Generates a Comment token

:arg data: the comment

:returns: Comment token

"""
        return {"type": "Comment", "data": data}

def doctype(self, name, publicId=None, systemId=None):
        """Generates a Doctype token

:arg name:

:arg publicId:

:arg systemId:

:returns: the Doctype token

"""
        return {"type": "Doctype",
                "name": name,
                "publicId": publicId,
                "systemId": systemId}

def entity(self, name):
        """Generates an Entity token

:arg name: the entity name

:returns: an Entity token

"""
        return {"type": "Entity", "name": name}

def unknown(self, nodeType):
        """Handles unknown node types"""
        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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Name	Size	Perms	Modified	Actions
__pycache__ DIR	-	drwxr-xr-x	2024-03-03 22:57:12	Edit Download recursive recursive
base.py	7.30 KB	lrw-r--r--	2023-11-13 21:31:06	Edit Download recursive recursive
dom.py	1.38 KB	lrw-r--r--	2023-11-13 21:31:06	Edit Download recursive recursive
etree.py	4.44 KB	lrw-r--r--	2023-11-13 21:31:06	Edit Download recursive recursive
etree_lxml.py	6.21 KB	lrw-r--r--	2023-11-13 21:31:06	Edit Download recursive recursive
genshi.py	2.25 KB	lrw-r--r--	2023-11-13 21:31:06	Edit Download recursive recursive
__init__.py	5.58 KB	lrw-r--r--	2023-11-13 21:31:06	Edit Download recursive recursive

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