html5lib-python/html5lib/html5parser.py at master · darobin/html5lib-python · GitHub

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from __future__ import absolute_import, division, unicode_literals

from six import with_metaclass

import types

from . import inputstream

from . import tokenizer

from . import treebuilders

from .treebuilders._base import Marker

from . import utils

from . import constants

from .constants import spaceCharacters, asciiUpper2Lower

from .constants import specialElements

from .constants import headingElements

from .constants import cdataElements, rcdataElements

from .constants import tokenTypes, ReparseException, namespaces

from .constants import htmlIntegrationPointElements, mathmlTextIntegrationPointElements

from .constants import adjustForeignAttributes as adjustForeignAttributesMap

def parse(doc, treebuilder="etree", encoding=None,

namespaceHTMLElements=True):

"""Parse a string or file-like object into a tree"""

tb = treebuilders.getTreeBuilder(treebuilder)

p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)

return p.parse(doc, encoding=encoding)

def parseFragment(doc, container="div", treebuilder="etree", encoding=None,

namespaceHTMLElements=True):

tb = treebuilders.getTreeBuilder(treebuilder)

p = HTMLParser(tb, namespaceHTMLElements=namespaceHTMLElements)

return p.parseFragment(doc, container=container, encoding=encoding)

def method_decorator_metaclass(function):

class Decorated(type):

def __new__(meta, classname, bases, classDict):

for attributeName, attribute in classDict.items():

if isinstance(attribute, types.FunctionType):

attribute = function(attribute)

classDict[attributeName] = attribute

return type.__new__(meta, classname, bases, classDict)

return Decorated

class HTMLParser(object):

"""HTML parser. Generates a tree structure from a stream of (possibly

malformed) HTML"""

def __init__(self, tree=None, tokenizer=tokenizer.HTMLTokenizer,

strict=False, namespaceHTMLElements=True, debug=False):

"""

strict - raise an exception when a parse error is encountered

tree - a treebuilder class controlling the type of tree that will be

returned. Built in treebuilders can be accessed through

html5lib.treebuilders.getTreeBuilder(treeType)

tokenizer - a class that provides a stream of tokens to the treebuilder.

This may be replaced for e.g. a sanitizer which converts some tags to

text

"""

# Raise an exception on the first error encountered

self.strict = strict

if tree is None:

tree = treebuilders.getTreeBuilder("etree")

self.tree = tree(namespaceHTMLElements)

self.tokenizer_class = tokenizer

self.errors = []

self.phases = dict([(name, cls(self, self.tree)) for name, cls in

getPhases(debug).items()])

def _parse(self, stream, innerHTML=False, container="div",

encoding=None, parseMeta=True, useChardet=True, **kwargs):

self.innerHTMLMode = innerHTML

self.container = container

self.tokenizer = self.tokenizer_class(stream, encoding=encoding,

parseMeta=parseMeta,

useChardet=useChardet,

parser=self, **kwargs)

self.reset()

while True:

try:

self.mainLoop()

break

except ReparseException:

self.reset()

def reset(self):

self.tree.reset()

self.firstStartTag = False

self.errors = []

self.log = [] # only used with debug mode

# "quirks" / "limited quirks" / "no quirks"

self.compatMode = "no quirks"

if self.innerHTMLMode:

self.innerHTML = self.container.lower()

if self.innerHTML in cdataElements:

self.tokenizer.state = self.tokenizer.rcdataState

elif self.innerHTML in rcdataElements:

self.tokenizer.state = self.tokenizer.rawtextState

elif self.innerHTML == 'plaintext':

self.tokenizer.state = self.tokenizer.plaintextState

else:

# state already is data state

# self.tokenizer.state = self.tokenizer.dataState

pass

self.phase = self.phases["beforeHtml"]

self.phase.insertHtmlElement()

self.resetInsertionMode()

else:

self.innerHTML = False

self.phase = self.phases["initial"]

self.lastPhase = None

self.beforeRCDataPhase = None

self.framesetOK = True

def isHTMLIntegrationPoint(self, element):

if (element.name == "annotation-xml" and

element.namespace == namespaces["mathml"]):

return ("encoding" in element.attributes and

element.attributes["encoding"].translate(

asciiUpper2Lower) in

("text/html", "application/xhtml+xml"))

else:

return (element.namespace, element.name) in htmlIntegrationPointElements

def isMathMLTextIntegrationPoint(self, element):

return (element.namespace, element.name) in mathmlTextIntegrationPointElements

def mainLoop(self):

CharactersToken = tokenTypes["Characters"]

SpaceCharactersToken = tokenTypes["SpaceCharacters"]

StartTagToken = tokenTypes["StartTag"]

EndTagToken = tokenTypes["EndTag"]

CommentToken = tokenTypes["Comment"]

DoctypeToken = tokenTypes["Doctype"]

ParseErrorToken = tokenTypes["ParseError"]

for token in self.normalizedTokens():

new_token = token

while new_token is not None:

currentNode = self.tree.openElements[-1] if self.tree.openElements else None

currentNodeNamespace = currentNode.namespace if currentNode else None

currentNodeName = currentNode.name if currentNode else None

type = new_token["type"]

if type == ParseErrorToken:

self.parseError(new_token["data"], new_token.get("datavars", {}))

new_token = None

else:

if (len(self.tree.openElements) == 0 or

currentNodeNamespace == self.tree.defaultNamespace or

(self.isMathMLTextIntegrationPoint(currentNode) and

((type == StartTagToken and

token["name"] not in frozenset(["mglyph", "malignmark"])) or

type in (CharactersToken, SpaceCharactersToken))) or

(currentNodeNamespace == namespaces["mathml"] and

currentNodeName == "annotation-xml" and

token["name"] == "svg") or

(self.isHTMLIntegrationPoint(currentNode) and

type in (StartTagToken, CharactersToken, SpaceCharactersToken))):

phase = self.phase

else:

phase = self.phases["inForeignContent"]

if type == CharactersToken:

new_token = phase.processCharacters(new_token)

elif type == SpaceCharactersToken:

new_token = phase.processSpaceCharacters(new_token)

elif type == StartTagToken:

new_token = phase.processStartTag(new_token)

elif type == EndTagToken:

new_token = phase.processEndTag(new_token)

elif type == CommentToken:

new_token = phase.processComment(new_token)

elif type == DoctypeToken:

new_token = phase.processDoctype(new_token)

if (type == StartTagToken and token["selfClosing"]

and not token["selfClosingAcknowledged"]):

self.parseError("non-void-element-with-trailing-solidus",

{"name": token["name"]})

# When the loop finishes it's EOF

reprocess = True

phases = []

while reprocess:

phases.append(self.phase)

reprocess = self.phase.processEOF()

if reprocess:

assert self.phase not in phases

def normalizedTokens(self):

for token in self.tokenizer:

yield self.normalizeToken(token)

def parse(self, stream, encoding=None, parseMeta=True, useChardet=True):

"""Parse a HTML document into a well-formed tree

stream - a filelike object or string containing the HTML to be parsed

The optional encoding parameter must be a string that indicates

the encoding. If specified, that encoding will be used,

regardless of any BOM or later declaration (such as in a meta

element)

"""

self._parse(stream, innerHTML=False, encoding=encoding,

parseMeta=parseMeta, useChardet=useChardet)

return self.tree.getDocument()

def parseFragment(self, stream, container="div", encoding=None,

parseMeta=False, useChardet=True):

"""Parse a HTML fragment into a well-formed tree fragment

container - name of the element we're setting the innerHTML property

if set to None, default to 'div'

stream - a filelike object or string containing the HTML to be parsed

The optional encoding parameter must be a string that indicates

the encoding. If specified, that encoding will be used,

regardless of any BOM or later declaration (such as in a meta

element)

"""

self._parse(stream, True, container=container, encoding=encoding)

return self.tree.getFragment()

def parseError(self, errorcode="XXX-undefined-error", datavars={}):

# XXX The idea is to make errorcode mandatory.

self.errors.append((self.tokenizer.stream.position(), errorcode, datavars))

if self.strict:

raise ParseError

def normalizeToken(self, token):

""" HTML5 specific normalizations to the token stream """

if token["type"] == tokenTypes["StartTag"]:

token["data"] = dict(token["data"][::-1])

return token

def adjustMathMLAttributes(self, token):

replacements = {"definitionurl": "definitionURL"}

for k, v in replacements.items():

if k in token["data"]:

token["data"][v] = token["data"][k]

del token["data"][k]

def adjustSVGAttributes(self, token):

replacements = {

"attributename": "attributeName",

"attributetype": "attributeType",

"basefrequency": "baseFrequency",

"baseprofile": "baseProfile",

"calcmode": "calcMode",

"clippathunits": "clipPathUnits",

"contentscripttype": "contentScriptType",

"contentstyletype": "contentStyleType",

"diffuseconstant": "diffuseConstant",

"edgemode": "edgeMode",

"externalresourcesrequired": "externalResourcesRequired",

"filterres": "filterRes",

"filterunits": "filterUnits",

"glyphref": "glyphRef",

"gradienttransform": "gradientTransform",

"gradientunits": "gradientUnits",

"kernelmatrix": "kernelMatrix",

"kernelunitlength": "kernelUnitLength",

"keypoints": "keyPoints",

"keysplines": "keySplines",

"keytimes": "keyTimes",

"lengthadjust": "lengthAdjust",

"limitingconeangle": "limitingConeAngle",

"markerheight": "markerHeight",

"markerunits": "markerUnits",

"markerwidth": "markerWidth",

"maskcontentunits": "maskContentUnits",

"maskunits": "maskUnits",

"numoctaves": "numOctaves",

"pathlength": "pathLength",

"patterncontentunits": "patternContentUnits",

"patterntransform": "patternTransform",

"patternunits": "patternUnits",

"pointsatx": "pointsAtX",

"pointsaty": "pointsAtY",

"pointsatz": "pointsAtZ",

"preservealpha": "preserveAlpha",

"preserveaspectratio": "preserveAspectRatio",

"primitiveunits": "primitiveUnits",

"refx": "refX",

"refy": "refY",

"repeatcount": "repeatCount",

"repeatdur": "repeatDur",

"requiredextensions": "requiredExtensions",

"requiredfeatures": "requiredFeatures",

"specularconstant": "specularConstant",

"specularexponent": "specularExponent",

"spreadmethod": "spreadMethod",

"startoffset": "startOffset",

"stddeviation": "stdDeviation",

"stitchtiles": "stitchTiles",

"surfacescale": "surfaceScale",

"systemlanguage": "systemLanguage",

"tablevalues": "tableValues",

"targetx": "targetX",

"targety": "targetY",

"textlength": "textLength",

"viewbox": "viewBox",

"viewtarget": "viewTarget",

"xchannelselector": "xChannelSelector",

"ychannelselector": "yChannelSelector",

"zoomandpan": "zoomAndPan"

}

for originalName in list(token["data"].keys()):

if originalName in replacements:

svgName = replacements[originalName]

token["data"][svgName] = token["data"][originalName]

del token["data"][originalName]

def adjustForeignAttributes(self, token):

replacements = adjustForeignAttributesMap

for originalName in token["data"].keys():

if originalName in replacements:

foreignName = replacements[originalName]

token["data"][foreignName] = token["data"][originalName]

del token["data"][originalName]

def reparseTokenNormal(self, token):

self.parser.phase()

def resetInsertionMode(self):

# The name of this method is mostly historical. (It's also used in the

# specification.)

last = False

newModes = {

"select": "inSelect",

"td": "inCell",

"th": "inCell",

"tr": "inRow",

"tbody": "inTableBody",

"thead": "inTableBody",

"tfoot": "inTableBody",

"caption": "inCaption",

"colgroup": "inColumnGroup",

"table": "inTable",

"head": "inBody",

"body": "inBody",

"frameset": "inFrameset",

"html": "beforeHead"

}

for node in self.tree.openElements[::-1]:

nodeName = node.name

new_phase = None

if node == self.tree.openElements[0]:

assert self.innerHTML

last = True

nodeName = self.innerHTML

# Check for conditions that should only happen in the innerHTML

# case

if nodeName in ("select", "colgroup", "head", "html"):

assert self.innerHTML

if not last and node.namespace != self.tree.defaultNamespace:

continue

if nodeName in newModes:

new_phase = self.phases[newModes[nodeName]]

break

elif last:

new_phase = self.phases["inBody"]

break

self.phase = new_phase

def parseRCDataRawtext(self, token, contentType):

"""Generic RCDATA/RAWTEXT Parsing algorithm

contentType - RCDATA or RAWTEXT

"""

assert contentType in ("RAWTEXT", "RCDATA")

self.tree.insertElement(token)

if contentType == "RAWTEXT":

self.tokenizer.state = self.tokenizer.rawtextState

else:

self.tokenizer.state = self.tokenizer.rcdataState

self.originalPhase = self.phase

self.phase = self.phases["text"]

def getPhases(debug):

def log(function):

"""Logger that records which phase processes each token"""

type_names = dict((value, key) for key, value in

constants.tokenTypes.items())

def wrapped(self, *args, **kwargs):

if function.__name__.startswith("process") and len(args) > 0:

token = args[0]

try:

info = {"type": type_names[token['type']]}

except:

raise

if token['type'] in constants.tagTokenTypes:

info["name"] = token['name']

self.parser.log.append((self.parser.tokenizer.state.__name__,

self.parser.phase.__class__.__name__,

self.__class__.__name__,

function.__name__,

info))

return function(self, *args, **kwargs)

else:

return function(self, *args, **kwargs)

return wrapped

def getMetaclass(use_metaclass, metaclass_func):

if use_metaclass:

return method_decorator_metaclass(metaclass_func)

else:

return type

class Phase(with_metaclass(getMetaclass(debug, log))):

"""Base class for helper object that implements each phase of processing

"""

def __init__(self, parser, tree):

self.parser = parser

self.tree = tree

def processEOF(self):

raise NotImplementedError

def processComment(self, token):

# For most phases the following is correct. Where it's not it will be

# overridden.

self.tree.insertComment(token, self.tree.openElements[-1])

def processDoctype(self, token):

self.parser.parseError("unexpected-doctype")

def processCharacters(self, token):

self.tree.insertText(token["data"])

def processSpaceCharacters(self, token):

self.tree.insertText(token["data"])

def processStartTag(self, token):

return self.startTagHandler[token["name"]](token)

def startTagHtml(self, token):

if not self.parser.firstStartTag and token["name"] == "html":

self.parser.parseError("non-html-root")

# XXX Need a check here to see if the first start tag token emitted is

# this token... If it's not, invoke self.parser.parseError().

for attr, value in token["data"].items():

if attr not in self.tree.openElements[0].attributes:

self.tree.openElements[0].attributes[attr] = value

self.parser.firstStartTag = False

def processEndTag(self, token):

return self.endTagHandler[token["name"]](token)

class InitialPhase(Phase):

def processSpaceCharacters(self, token):

pass

def processComment(self, token):

self.tree.insertComment(token, self.tree.document)

def processDoctype(self, token):

name = token["name"]

publicId = token["publicId"]

systemId = token["systemId"]

correct = token["correct"]

if (name != "html" or publicId is not None or

systemId is not None and systemId != "about:legacy-compat"):

self.parser.parseError("unknown-doctype")

if publicId is None:

publicId = ""

self.tree.insertDoctype(token)

if publicId != "":

publicId = publicId.translate(asciiUpper2Lower)

if (not correct or token["name"] != "html"

or publicId.startswith(

("+//silmaril//dtd html pro v0r11 19970101//",

"-//advasoft ltd//dtd html 3.0 aswedit + extensions//",

"-//as//dtd html 3.0 aswedit + extensions//",

"-//ietf//dtd html 2.0 level 1//",

"-//ietf//dtd html 2.0 level 2//",

"-//ietf//dtd html 2.0 strict level 1//",

"-//ietf//dtd html 2.0 strict level 2//",

"-//ietf//dtd html 2.0 strict//",

"-//ietf//dtd html 2.0//",

"-//ietf//dtd html 2.1e//",

"-//ietf//dtd html 3.0//",

"-//ietf//dtd html 3.2 final//",

"-//ietf//dtd html 3.2//",

"-//ietf//dtd html 3//",

"-//ietf//dtd html level 0//",

"-//ietf//dtd html level 1//",

"-//ietf//dtd html level 2//",

"-//ietf//dtd html level 3//",

"-//ietf//dtd html strict level 0//",

"-//ietf//dtd html strict level 1//",

"-//ietf//dtd html strict level 2//",

"-//ietf//dtd html strict level 3//",

"-//ietf//dtd html strict//",

"-//ietf//dtd html//",

"-//metrius//dtd metrius presentational//",

"-//microsoft//dtd internet explorer 2.0 html strict//",

"-//microsoft//dtd internet explorer 2.0 html//",

"-//microsoft//dtd internet explorer 2.0 tables//",

"-//microsoft//dtd internet explorer 3.0 html strict//",

"-//microsoft//dtd internet explorer 3.0 html//",

"-//microsoft//dtd internet explorer 3.0 tables//",

"-//netscape comm. corp.//dtd html//",

"-//netscape comm. corp.//dtd strict html//",

"-//o'reilly and associates//dtd html 2.0//",

"-//o'reilly and associates//dtd html extended 1.0//",

"-//o'reilly and associates//dtd html extended relaxed 1.0//",

"-//softquad software//dtd hotmetal pro 6.0::19990601::extensions to html 4.0//",

"-//softquad//dtd hotmetal pro 4.0::19971010::extensions to html 4.0//",

"-//spyglass//dtd html 2.0 extended//",

"-//sq//dtd html 2.0 hotmetal + extensions//",

"-//sun microsystems corp.//dtd hotjava html//",

"-//sun microsystems corp.//dtd hotjava strict html//",

"-//w3c//dtd html 3 1995-03-24//",

"-//w3c//dtd html 3.2 draft//",

"-//w3c//dtd html 3.2 final//",

"-//w3c//dtd html 3.2//",

"-//w3c//dtd html 3.2s draft//",

"-//w3c//dtd html 4.0 frameset//",

"-//w3c//dtd html 4.0 transitional//",

"-//w3c//dtd html experimental 19960712//",

"-//w3c//dtd html experimental 970421//",

"-//w3c//dtd w3 html//",

"-//w3o//dtd w3 html 3.0//",

"-//webtechs//dtd mozilla html 2.0//",

"-//webtechs//dtd mozilla html//"))

or publicId in

("-//w3o//dtd w3 html strict 3.0//en//",

"-/w3c/dtd html 4.0 transitional/en",

"html")

or publicId.startswith(

("-//w3c//dtd html 4.01 frameset//",

"-//w3c//dtd html 4.01 transitional//")) and

systemId is None

or systemId and systemId.lower() == "http://www.ibm.com/data/dtd/v11/ibmxhtml1-transitional.dtd"):

self.parser.compatMode = "quirks"

elif (publicId.startswith(

("-//w3c//dtd xhtml 1.0 frameset//",

"-//w3c//dtd xhtml 1.0 transitional//"))

or publicId.startswith(

("-//w3c//dtd html 4.01 frameset//",

"-//w3c//dtd html 4.01 transitional//")) and

systemId is not None):

self.parser.compatMode = "limited quirks"

self.parser.phase = self.parser.phases["beforeHtml"]

def anythingElse(self):

self.parser.compatMode = "quirks"

self.parser.phase = self.parser.phases["beforeHtml"]

def processCharacters(self, token):

self.parser.parseError("expected-doctype-but-got-chars")

self.anythingElse()

return token

def processStartTag(self, token):

self.parser.parseError("expected-doctype-but-got-start-tag",

{"name": token["name"]})

self.anythingElse()

return token

def processEndTag(self, token):

self.parser.parseError("expected-doctype-but-got-end-tag",

{"name": token["name"]})

self.anythingElse()

return token

def processEOF(self):

self.parser.parseError("expected-doctype-but-got-eof")

self.anythingElse()

return True

class BeforeHtmlPhase(Phase):

# helper methods

def insertHtmlElement(self):

self.tree.insertRoot(impliedTagToken("html", "StartTag"))

self.parser.phase = self.parser.phases["beforeHead"]

# other

def processEOF(self):

self.insertHtmlElement()

return True

def processComment(self, token):

self.tree.insertComment(token, self.tree.document)

def processSpaceCharacters(self, token):

pass

def processCharacters(self, token):

self.insertHtmlElement()

return token

def processStartTag(self, token):

if token["name"] == "html":

self.parser.firstStartTag = True

self.insertHtmlElement()

return token

def processEndTag(self, token):

if token["name"] not in ("head", "body", "html", "br"):

self.parser.parseError("unexpected-end-tag-before-html",

{"name": token["name"]})

else:

self.insertHtmlElement()

return token

class BeforeHeadPhase(Phase):

def __init__(self, parser, tree):

Phase.__init__(self, parser, tree)

self.startTagHandler = utils.MethodDispatcher([

("html", self.startTagHtml),

("head", self.startTagHead)

])

self.startTagHandler.default = self.startTagOther

self.endTagHandler = utils.MethodDispatcher([

(("head", "body", "html", "br"), self.endTagImplyHead)

])

self.endTagHandler.default = self.endTagOther

def processEOF(self):

self.startTagHead(impliedTagToken("head", "StartTag"))

return True

def processSpaceCharacters(self, token):

pass

def processCharacters(self, token):

self.startTagHead(impliedTagToken("head", "StartTag"))

return token

def startTagHtml(self, token):

return self.parser.phases["inBody"].processStartTag(token)

def startTagHead(self, token):

self.tree.insertElement(token)

self.tree.headPointer = self.tree.openElements[-1]

self.parser.phase = self.parser.phases["inHead"]

def startTagOther(self, token):

self.startTagHead(impliedTagToken("head", "StartTag"))

return token

def endTagImplyHead(self, token):

self.startTagHead(impliedTagToken("head", "StartTag"))

return token

def endTagOther(self, token):

self.parser.parseError("end-tag-after-implied-root",

{"name": token["name"]})

class InHeadPhase(Phase):

def __init__(self, parser, tree):

Phase.__init__(self, parser, tree)

self.startTagHandler = utils.MethodDispatcher([

("html", self.startTagHtml),

("title", self.startTagTitle),

(("noscript", "noframes", "style"), self.startTagNoScriptNoFramesStyle),

("script", self.startTagScript),

(("base", "basefont", "bgsound", "command", "link"),

self.startTagBaseLinkCommand),

("meta", self.startTagMeta),

("head", self.startTagHead)

])

self.startTagHandler.default = self.startTagOther

self. endTagHandler = utils.MethodDispatcher([

("head", self.endTagHead),

(("br", "html", "body"), self.endTagHtmlBodyBr)

])

self.endTagHandler.default = self.endTagOther

# the real thing

def processEOF(self):

self.anythingElse()

return True

def processCharacters(self, token):

self.anythingElse()

return token

def startTagHtml(self, token):

return self.parser.phases["inBody"].processStartTag(token)

def startTagHead(self, token):

self.parser.parseError("two-heads-are-not-better-than-one")

def startTagBaseLinkCommand(self, token):

self.tree.insertElement(token)

self.tree.openElements.pop()

token["selfClosingAcknowledged"] = True

def startTagMeta(self, token):

self.tree.insertElement(token)

self.tree.openElements.pop()

token["selfClosingAcknowledged"] = True

attributes = token["data"]

if self.parser.tokenizer.stream.charEncoding[1] == "tentative":

if "charset" in attributes:

self.parser.tokenizer.stream.changeEncoding(attributes["charset"])

elif ("content" in attributes and

"http-equiv" in attributes and

attributes["http-equiv"].lower() == "content-type"):

# Encoding it as UTF-8 here is a hack, as really we should pass

# the abstract Unicode string, and just use the

# ContentAttrParser on that, but using UTF-8 allows all chars

# to be encoded and as a ASCII-superset works.

data = inputstream.EncodingBytes(attributes["content"].encode("utf-8"))

parser = inputstream.ContentAttrParser(data)

codec = parser.parse()

self.parser.tokenizer.stream.changeEncoding(codec)

def startTagTitle(self, token):

self.parser.parseRCDataRawtext(token, "RCDATA")

def startTagNoScriptNoFramesStyle(self, token):

# Need to decide whether to implement the scripting-disabled case

self.parser.parseRCDataRawtext(token, "RAWTEXT")

def startTagScript(self, token):

self.tree.insertElement(token)

self.parser.tokenizer.state = self.parser.tokenizer.scriptDataState

self.parser.originalPhase = self.parser.phase

self.parser.phase = self.parser.phases["text"]

def startTagOther(self, token):

self.anythingElse()

return token

def endTagHead(self, token):

node = self.parser.tree.openElements.pop()

assert node.name == "head", "Expected head got %s" % node.name

self.parser.phase = self.parser.phases["afterHead"]

def endTagHtmlBodyBr(self, token):

self.anythingElse()

return token

def endTagOther(self, token):

self.parser.parseError("unexpected-end-tag", {"name": token["name"]})

def anythingElse(self):

self.endTagHead(impliedTagToken("head"))

# XXX If we implement a parser for which scripting is disabled we need to

# implement this phase.

# class InHeadNoScriptPhase(Phase):

class AfterHeadPhase(Phase):

def __init__(self, parser, tree):

Phase.__init__(self, parser, tree)

self.startTagHandler = utils.MethodDispatcher([

("html", self.startTagHtml),

("body", self.startTagBody),

("frameset", self.startTagFrameset),

(("base", "basefont", "bgsound", "link", "meta", "noframes", "script",

"style", "title"),

self.startTagFromHead),

("head", self.startTagHead)

])

self.startTagHandler.default = self.startTagOther

self.endTagHandler = utils.MethodDispatcher([(("body", "html", "br"),

self.endTagHtmlBodyBr)])

self.endTagHandler.default = self.endTagOther

def processEOF(self):

self.anythingElse()

return True

def processCharacters(self, token):

self.anythingElse()

return token

def startTagHtml(self, token):

return self.parser.phases["inBody"].processStartTag(token)

def startTagBody(self, token):

self.parser.framesetOK = False

self.tree.insertElement(token)

self.parser.phase = self.parser.phases["inBody"]

def startTagFrameset(self, token):

self.tree.insertElement(token)

self.parser.phase = self.parser.phases["inFrameset"]

def startTagFromHead(self, token):

self.parser.parseError("unexpected-start-tag-out-of-my-head",

{"name": token["name"]})

self.tree.openElements.append(self.tree.headPointer)

self.parser.phases["inHead"].processStartTag(token)

for node in self.tree.openElements[::-1]:

if node.name == "head":

self.tree.openElements.remove(node)

break

def startTagHead(self, token):

self.parser.parseError("unexpected-start-tag", {"name": token["name"]})

def startTagOther(self, token):

self.anythingElse()

return token

def endTagHtmlBodyBr(self, token):

self.anythingElse()

return token

def endTagOther(self, token):

self.parser.parseError("unexpected-end-tag", {"name": token["name"]})

def anythingElse(self):

self.tree.insertElement(impliedTagToken("body", "StartTag"))

self.parser.phase = self.parser.phases["inBody"]

self.parser.framesetOK = True

class InBodyPhase(Phase):

# http://www.whatwg.org/specs/web-apps/current-work/#parsing-main-inbody

# the really-really-really-very crazy mode

def __init__(self, parser, tree):

Phase.__init__(self, parser, tree)

# Keep a ref to this for special handling of whitespace in <pre>

self.processSpaceCharactersNonPre = self.processSpaceCharacters

self.startTagHandler = utils.MethodDispatcher([

("html", self.startTagHtml),

(("base", "basefont", "bgsound", "command", "link", "meta",

"noframes", "script", "style", "title"),

self.startTagProcessInHead),

("body", self.startTagBody),

("frameset", self.startTagFrameset),

(("address", "article", "aside", "blockquote", "center", "details",

"details", "dir", "div", "dl", "fieldset", "figcaption", "figure",

"footer", "header", "hgroup", "main", "menu", "nav", "ol", "p",

"section", "summary", "ul"),

self.startTagCloseP),

(headingElements, self.startTagHeading),

(("pre", "listing"), self.startTagPreListing),

("form", self.startTagForm),

(("li", "dd", "dt"), self.startTagListItem),

("plaintext", self.startTagPlaintext),

("a", self.startTagA),

(("b", "big", "code", "em", "font", "i", "s", "small", "strike",

"strong", "tt", "u"), self.startTagFormatting),

("nobr", self.startTagNobr),

("button", self.startTagButton),

(("applet", "marquee", "object"), self.startTagAppletMarqueeObject),

("xmp", self.startTagXmp),

("table", self.startTagTable),

(("area", "br", "embed", "img", "keygen", "wbr"),

self.startTagVoidFormatting),

(("param", "source", "track"), self.startTagParamSource),

("input", self.startTagInput),

("hr", self.startTagHr),

("image", self.startTagImage),

("isindex", self.startTagIsIndex),

("textarea", self.startTagTextarea),

("iframe", self.startTagIFrame),

(("noembed", "noframes", "noscript"), self.startTagRawtext),

("select", self.startTagSelect),

(("rp", "rt"), self.startTagRpRt),

(("option", "optgroup"), self.startTagOpt),

(("math"), self.startTagMath),

(("svg"), self.startTagSvg),

(("caption", "col", "colgroup", "frame", "head",

"tbody", "td", "tfoot", "th", "thead",

"tr"), self.startTagMisplaced)

])

self.startTagHandler.default = self.startTagOther

self.endTagHandler = utils.MethodDispatcher([

("body", self.endTagBody),

("html", self.endTagHtml),

(("address", "article", "aside", "blockquote", "button", "center",

"details", "dialog", "dir", "div", "dl", "fieldset", "figcaption", "figure",

"footer", "header", "hgroup", "listing", "main", "menu", "nav", "ol", "pre",

"section", "summary", "ul"), self.endTagBlock),

("form", self.endTagForm),

("p", self.endTagP),

(("dd", "dt", "li"), self.endTagListItem),

(headingElements, self.endTagHeading),

(("a", "b", "big", "code", "em", "font", "i", "nobr", "s", "small",

"strike", "strong", "tt", "u"), self.endTagFormatting),

(("applet", "marquee", "object"), self.endTagAppletMarqueeObject),

("br", self.endTagBr),

])

self.endTagHandler.default = self.endTagOther

def isMatchingFormattingElement(self, node1, node2):

if node1.name != node2.name or node1.namespace != node2.namespace:

return False

elif len(node1.attributes) != len(node2.attributes):

return False

else:

attributes1 = sorted(node1.attributes.items())

attributes2 = sorted(node2.attributes.items())

for attr1, attr2 in zip(attributes1, attributes2):

if attr1 != attr2:

return False

return True

# helper

def addFormattingElement(self, token):

self.tree.insertElement(token)

element = self.tree.openElements[-1]

matchingElements = []

for node in self.tree.activeFormattingElements[::-1]:

if node is Marker:

break

elif self.isMatchingFormattingElement(node, element):

matchingElements.append(node)

assert len(matchingElements) <= 3

if len(matchingElements) == 3:

self.tree.activeFormattingElements.remove(matchingElements[-1])

self.tree.activeFormattingElements.append(element)

# the real deal

def processEOF(self):

allowed_elements = frozenset(("dd", "dt", "li", "p", "tbody", "td",

"tfoot", "th", "thead", "tr", "body",

"html"))

for node in self.tree.openElements[::-1]:

if node.name not in allowed_elements:

self.parser.parseError("expected-closing-tag-but-got-eof")

break

# Stop parsing

def processSpaceCharactersDropNewline(self, token):

# Sometimes (start of <pre>, <listing>, and <textarea> blocks) we

# want to drop leading newlines

data = token["data"]

self.processSpaceCharacters = self.processSpaceCharactersNonPre

if (data.startswith("\n") and

self.tree.openElements[-1].name in ("pre", "listing", "textarea")

and not self.tree.openElements[-1].hasContent()):

data = data[1:]

if data:

self.tree.reconstructActiveFormattingElements()

self.tree.insertText(data)

def processCharacters(self, token):

if token["data"] == "\u0000":

# The tokenizer should always emit null on its own

return

self.tree.reconstructActiveFormattingElements()

self.tree.insertText(token["data"])

# This must be bad for performance

if (self.parser.framesetOK and

any([char not in spaceCharacters

for char in token["data"]])):

self.parser.framesetOK = False

def processSpaceCharacters(self, token):

self.tree.reconstructActiveFormattingElements()

self.tree.insertText(token["data"])

View remainder of file in raw view

html5lib-python/html5lib/html5parser.py at master · darobin/html5lib-python · GitHub

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