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html5lib-python/src/html5lib/tokenizer.py at python3-old · moben/html5lib-python · GitHub
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tokenizer.py
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from
collections
import
deque
from
.
constants
import
contentModelFlags
,
spaceCharacters
from
.
constants
import
entitiesWindows1252
,
entities
from
.
constants
import
asciiLowercase
,
asciiLetters
,
asciiUpper2Lower
from
.
constants
import
digits
,
hexDigits
,
EOF
from
.
constants
import
tokenTypes
from
.
inputstream
import
HTMLInputStream
# Group entities by their first character, for faster lookups
entitiesByFirstChar
=
{}
for
e
in
entities
:
entitiesByFirstChar
.
setdefault
(
e
[
0
], []).
append
(
e
)
class
HTMLTokenizer
:
""" This class takes care of tokenizing HTML.
* self.currentToken
Holds the token that is currently being processed.
* self.state
Holds a reference to the method to be invoked... XXX
* self.states
Holds a mapping between states and methods that implement the state.
* self.stream
Points to HTMLInputStream object.
"""
# XXX need to fix documentation
def
__init__
(
self
,
stream
,
encoding
=
None
,
parseMeta
=
True
,
useChardet
=
True
,
lowercaseElementName
=
True
,
lowercaseAttrName
=
True
):
self
.
stream
=
HTMLInputStream
(
stream
,
encoding
,
parseMeta
,
useChardet
)
#Perform case conversions?
self
.
lowercaseElementName
=
lowercaseElementName
self
.
lowercaseAttrName
=
lowercaseAttrName
self
.
states
=
{
"data"
:
self
.
dataState
,
"entityData"
:
self
.
entityDataState
,
"tagOpen"
:
self
.
tagOpenState
,
"closeTagOpen"
:
self
.
closeTagOpenState
,
"tagName"
:
self
.
tagNameState
,
"beforeAttributeName"
:
self
.
beforeAttributeNameState
,
"attributeName"
:
self
.
attributeNameState
,
"afterAttributeName"
:
self
.
afterAttributeNameState
,
"beforeAttributeValue"
:
self
.
beforeAttributeValueState
,
"attributeValueDoubleQuoted"
:
self
.
attributeValueDoubleQuotedState
,
"attributeValueSingleQuoted"
:
self
.
attributeValueSingleQuotedState
,
"attributeValueUnQuoted"
:
self
.
attributeValueUnQuotedState
,
"afterAttributeValue"
:
self
.
afterAttributeValueState
,
"selfClosingStartTag"
:
self
.
selfClosingStartTagState
,
"bogusComment"
:
self
.
bogusCommentState
,
"bogusCommentContinuation"
:
self
.
bogusCommentContinuationState
,
"markupDeclarationOpen"
:
self
.
markupDeclarationOpenState
,
"commentStart"
:
self
.
commentStartState
,
"commentStartDash"
:
self
.
commentStartDashState
,
"comment"
:
self
.
commentState
,
"commentEndDash"
:
self
.
commentEndDashState
,
"commentEnd"
:
self
.
commentEndState
,
"doctype"
:
self
.
doctypeState
,
"beforeDoctypeName"
:
self
.
beforeDoctypeNameState
,
"doctypeName"
:
self
.
doctypeNameState
,
"afterDoctypeName"
:
self
.
afterDoctypeNameState
,
"beforeDoctypePublicIdentifier"
:
self
.
beforeDoctypePublicIdentifierState
,
"doctypePublicIdentifierDoubleQuoted"
:
self
.
doctypePublicIdentifierDoubleQuotedState
,
"doctypePublicIdentifierSingleQuoted"
:
self
.
doctypePublicIdentifierSingleQuotedState
,
"afterDoctypePublicIdentifier"
:
self
.
afterDoctypePublicIdentifierState
,
"beforeDoctypeSystemIdentifier"
:
self
.
beforeDoctypeSystemIdentifierState
,
"doctypeSystemIdentifierDoubleQuoted"
:
self
.
doctypeSystemIdentifierDoubleQuotedState
,
"doctypeSystemIdentifierSingleQuoted"
:
self
.
doctypeSystemIdentifierSingleQuotedState
,
"afterDoctypeSystemIdentifier"
:
self
.
afterDoctypeSystemIdentifierState
,
"bogusDoctype"
:
self
.
bogusDoctypeState
}
# Setup the initial tokenizer state
self
.
contentModelFlag
=
contentModelFlags
[
"PCDATA"
]
self
.
escapeFlag
=
False
self
.
lastFourChars
=
[]
self
.
state
=
self
.
states
[
"data"
]
self
.
escape
=
False
# The current token being created
self
.
currentToken
=
None
def
__iter__
(
self
):
""" This is where the magic happens.
We do our usually processing through the states and when we have a token
to return we yield the token which pauses processing until the next token
is requested.
"""
self
.
tokenQueue
=
deque
([])
# Start processing. When EOF is reached self.state will return False
# instead of True and the loop will terminate.
while
self
.
state
():
while
self
.
stream
.
errors
:
yield
{
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
self
.
stream
.
errors
.
pop
(
0
)}
while
self
.
tokenQueue
:
yield
self
.
tokenQueue
.
popleft
()
def
consumeNumberEntity
(
self
,
isHex
):
"""This function returns either U+FFFD or the character based on the
decimal or hexadecimal representation. It also discards ";" if present.
If not present self.tokenQueue.append({"type": tokenTypes["ParseError"]}) is invoked.
"""
allowed
=
digits
radix
=
10
if
isHex
:
allowed
=
hexDigits
radix
=
16
charStack
=
[]
# Consume all the characters that are in range while making sure we
# don't hit an EOF.
c
=
self
.
stream
.
char
()
while
c
in
allowed
and
c
is
not
EOF
:
charStack
.
append
(
c
)
c
=
self
.
stream
.
char
()
# Convert the set of characters consumed to an int.
charAsInt
=
int
(
""
.
join
(
charStack
),
radix
)
if
charAsInt
==
13
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"incorrect-cr-newline-entity"
})
charAsInt
=
10
elif
127
<
charAsInt
<
160
:
# If the integer is between 127 and 160 (so 128 and bigger and 159
# and smaller) we need to do the "windows trick".
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"illegal-windows-1252-entity"
})
charAsInt
=
entitiesWindows1252
[
charAsInt
-
128
]
# Certain characters get replaced with U+FFFD
if
((
charAsInt
<=
0x0008
)
or
(
charAsInt
==
0x000B
)
or
(
0x000E
<=
charAsInt
<=
0x001F
)
or
(
0x007F
<=
charAsInt
<=
0x009F
)
or
(
0xD800
<=
charAsInt
<=
0xDFFF
)
or
(
0xFDD0
<=
charAsInt
<=
0xFDEF
)
or
(
charAsInt
&
0xFFFE
==
0xFFFE
)
# catch all U+?FFFE and U+?FFFF, where ? is 0..10
or
(
0x10FFFF
<
charAsInt
)):
char
=
"
\uFFFD
"
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"illegal-codepoint-for-numeric-entity"
,
"datavars"
: {
"charAsInt"
:
charAsInt
}})
else
:
try
:
# XXX We should have a separate function that does "int" to
# "unicodestring" conversion since this doesn't always work
# according to hsivonen. Also, unichr has a limitation of 65535
char
=
chr
(
charAsInt
)
except
:
try
:
char
=
eval
(
"u'
\\
U%08x'"
%
charAsInt
)
except
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"cant-convert-numeric-entity"
,
"datavars"
: {
"charAsInt"
:
charAsInt
}})
# Discard the ; if present. Otherwise, put it back on the queue and
# invoke parseError on parser.
if
c
!=
";"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"numeric-entity-without-semicolon"
})
self
.
stream
.
unget
(
c
)
return
char
def
consumeEntity
(
self
,
allowedChar
=
None
,
fromAttribute
=
False
):
# Initialise to the default output for when no entity is matched
output
=
"&"
charStack
=
[
self
.
stream
.
char
()]
if
charStack
[
0
]
in
spaceCharacters
or
charStack
[
0
]
in
(
EOF
,
"<"
,
"&"
) \
or
(
allowedChar
is
not
None
and
allowedChar
==
charStack
[
0
]):
self
.
stream
.
unget
(
charStack
[
0
])
elif
charStack
[
0
]
==
"#"
:
# Read the next character to see if it's hex or decimal
hex
=
False
charStack
.
append
(
self
.
stream
.
char
())
if
charStack
[
-
1
]
in
(
"x"
,
"X"
):
hex
=
True
charStack
.
append
(
self
.
stream
.
char
())
# charStack[-1] should be the first digit
if
(
hex
and
charStack
[
-
1
]
in
hexDigits
) \
or
(
not
hex
and
charStack
[
-
1
]
in
digits
):
# At least one digit found, so consume the whole number
self
.
stream
.
unget
(
charStack
[
-
1
])
output
=
self
.
consumeNumberEntity
(
hex
)
else
:
# No digits found
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-numeric-entity"
})
self
.
stream
.
unget
(
charStack
.
pop
())
output
=
"&"
+
""
.
join
(
charStack
)
else
:
# At this point in the process might have named entity. Entities
# are stored in the global variable "entities".
#
# Consume characters and compare to these to a substring of the
# entity names in the list until the substring no longer matches.
filteredEntityList
=
entitiesByFirstChar
.
get
(
charStack
[
0
], [])
def
entitiesStartingWith
(
name
):
return
[
e
for
e
in
filteredEntityList
if
e
.
startswith
(
name
)]
while
charStack
[
-
1
]
is
not
EOF
and
\
entitiesStartingWith
(
""
.
join
(
charStack
)):
charStack
.
append
(
self
.
stream
.
char
())
# At this point we have a string that starts with some characters
# that may match an entity
entityName
=
None
# Try to find the longest entity the string will match to take care
# of ¬i for instance.
for
entityLength
in
range
(
len
(
charStack
)
-
1
,
1
,
-
1
):
possibleEntityName
=
""
.
join
(
charStack
[:
entityLength
])
if
possibleEntityName
in
entities
:
entityName
=
possibleEntityName
break
if
entityName
is
not
None
:
if
entityName
[
-
1
]
!=
";"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"named-entity-without-semicolon"
})
if
entityName
[
-
1
]
!=
";"
and
fromAttribute
and
\
(
charStack
[
entityLength
]
in
asciiLetters
or
charStack
[
entityLength
]
in
digits
):
self
.
stream
.
unget
(
charStack
.
pop
())
output
=
"&"
+
""
.
join
(
charStack
)
else
:
output
=
entities
[
entityName
]
self
.
stream
.
unget
(
charStack
.
pop
())
output
+=
""
.
join
(
charStack
[
entityLength
:])
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-named-entity"
})
self
.
stream
.
unget
(
charStack
.
pop
())
output
=
"&"
+
""
.
join
(
charStack
)
if
fromAttribute
:
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
output
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
output
})
def
processEntityInAttribute
(
self
,
allowedChar
):
"""This method replaces the need for "entityInAttributeValueState".
"""
self
.
consumeEntity
(
allowedChar
=
allowedChar
,
fromAttribute
=
True
)
def
emitCurrentToken
(
self
):
"""This method is a generic handler for emitting the tags. It also sets
the state to "data" because that's what's needed after a token has been
emitted.
"""
token
=
self
.
currentToken
# Add token to the queue to be yielded
if
(
token
[
"type"
]
in
(
tokenTypes
[
"StartTag"
],
tokenTypes
[
"EndTag"
],
tokenTypes
[
"EmptyTag"
])):
if
self
.
lowercaseElementName
:
token
[
"name"
]
=
token
[
"name"
].
translate
(
asciiUpper2Lower
)
if
token
[
"type"
]
==
tokenTypes
[
"EndTag"
]:
if
token
[
"data"
]:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"attributes-in-end-tag"
})
if
token
[
"selfClosing"
]:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"self-closing-flag-on-end-tag"
})
self
.
tokenQueue
.
append
(
token
)
self
.
state
=
self
.
states
[
"data"
]
# Below are the various tokenizer states worked out.
def
dataState
(
self
):
data
=
self
.
stream
.
char
()
# Keep a charbuffer to handle the escapeFlag
if
(
self
.
contentModelFlag
in
(
contentModelFlags
[
"CDATA"
],
contentModelFlags
[
"RCDATA"
])):
if
len
(
self
.
lastFourChars
)
==
4
:
self
.
lastFourChars
.
pop
(
0
)
self
.
lastFourChars
.
append
(
data
)
# The rest of the logic
if
(
data
==
"&"
and
self
.
contentModelFlag
in
(
contentModelFlags
[
"PCDATA"
],
contentModelFlags
[
"RCDATA"
])
and
not
self
.
escapeFlag
):
self
.
state
=
self
.
states
[
"entityData"
]
elif
(
data
==
"-"
and
self
.
contentModelFlag
in
(
contentModelFlags
[
"CDATA"
],
contentModelFlags
[
"RCDATA"
])
and
not
self
.
escapeFlag
and
""
.
join
(
self
.
lastFourChars
)
==
"<!--"
):
self
.
escapeFlag
=
True
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
elif
(
data
==
"<"
and
(
self
.
contentModelFlag
==
contentModelFlags
[
"PCDATA"
]
or
(
self
.
contentModelFlag
in
(
contentModelFlags
[
"CDATA"
],
contentModelFlags
[
"RCDATA"
])
and
self
.
escapeFlag
==
False
))):
self
.
state
=
self
.
states
[
"tagOpen"
]
elif
(
data
==
">"
and
self
.
contentModelFlag
in
(
contentModelFlags
[
"CDATA"
],
contentModelFlags
[
"RCDATA"
])
and
self
.
escapeFlag
and
""
.
join
(
self
.
lastFourChars
)[
1
:]
==
"-->"
):
self
.
escapeFlag
=
False
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
})
elif
data
is
EOF
:
# Tokenization ends.
return
False
elif
data
in
spaceCharacters
:
# Directly after emitting a token you switch back to the "data
# state". At that point spaceCharacters are important so they are
# emitted separately.
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"SpaceCharacters"
],
"data"
:
data
+
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)})
# No need to update lastFourChars here, since the first space will
# have already been appended to lastFourChars and will have broken
# any <!-- or --> sequences
else
:
if
(
self
.
contentModelFlag
in
(
contentModelFlags
[
"CDATA"
],
contentModelFlags
[
"RCDATA"
])):
chars
=
self
.
stream
.
charsUntil
((
"&"
,
"<"
,
">"
,
"-"
))
self
.
lastFourChars
+=
chars
[
-
4
:]
self
.
lastFourChars
=
self
.
lastFourChars
[
-
4
:]
else
:
chars
=
self
.
stream
.
charsUntil
((
"&"
,
"<"
))
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
data
+
chars
})
return
True
def
entityDataState
(
self
):
self
.
consumeEntity
()
self
.
state
=
self
.
states
[
"data"
]
return
True
def
tagOpenState
(
self
):
data
=
self
.
stream
.
char
()
if
self
.
contentModelFlag
==
contentModelFlags
[
"PCDATA"
]:
if
data
==
"!"
:
self
.
state
=
self
.
states
[
"markupDeclarationOpen"
]
elif
data
==
"/"
:
self
.
state
=
self
.
states
[
"closeTagOpen"
]
elif
data
in
asciiLetters
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"StartTag"
],
"name"
:
data
,
"data"
: [],
"selfClosing"
:
False
,
"selfClosingAcknowledged"
:
False
}
self
.
state
=
self
.
states
[
"tagName"
]
elif
data
==
">"
:
# XXX In theory it could be something besides a tag name. But
# do we really care?
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-tag-name-but-got-right-bracket"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<>"
})
self
.
state
=
self
.
states
[
"data"
]
elif
data
==
"?"
:
# XXX In theory it could be something besides a tag name. But
# do we really care?
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-tag-name-but-got-question-mark"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"bogusComment"
]
else
:
# XXX
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-tag-name"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"data"
]
else
:
# We know the content model flag is set to either RCDATA or CDATA
# now because this state can never be entered with the PLAINTEXT
# flag.
if
data
==
"/"
:
self
.
state
=
self
.
states
[
"closeTagOpen"
]
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"<"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"data"
]
return
True
def
closeTagOpenState
(
self
):
if
(
self
.
contentModelFlag
in
(
contentModelFlags
[
"RCDATA"
],
contentModelFlags
[
"CDATA"
])):
charStack
=
[]
if
self
.
currentToken
:
# So far we know that "</" has been consumed. We now need to know
# whether the next few characters match the name of last emitted
# start tag which also happens to be the currentToken.
matched
=
True
for
expected
in
self
.
currentToken
[
"name"
].
lower
():
charStack
.
append
(
self
.
stream
.
char
())
if
charStack
[
-
1
]
not
in
(
expected
,
expected
.
upper
()):
matched
=
False
break
# If the tag name prefix matched, we also need to check the
# subsequent character
if
matched
:
charStack
.
append
(
self
.
stream
.
char
())
if
charStack
[
-
1
]
in
(
spaceCharacters
|
frozenset
((
">"
,
"/"
,
EOF
))):
self
.
contentModelFlag
=
contentModelFlags
[
"PCDATA"
]
# Unget the last character, so it can be re-processed
# in the next state
self
.
stream
.
unget
(
charStack
.
pop
())
# The remaining characters in charStack are the tag name
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
""
.
join
(
charStack
),
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
states
[
"tagName"
]
return
True
# Didn't find the end tag. The last character in charStack could be
# anything, so it has to be re-processed in the data state
self
.
stream
.
unget
(
charStack
.
pop
())
# The remaining characters are a prefix of the tag name, so they're
# just letters and digits, so they can be output as character
# tokens immediately
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
+
""
.
join
(
charStack
)})
self
.
state
=
self
.
states
[
"data"
]
return
True
data
=
self
.
stream
.
char
()
if
data
in
asciiLetters
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"EndTag"
],
"name"
:
data
,
"data"
: [],
"selfClosing"
:
False
}
self
.
state
=
self
.
states
[
"tagName"
]
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-closing-tag-but-got-right-bracket"
})
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-closing-tag-but-got-eof"
})
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"Characters"
],
"data"
:
"</"
})
self
.
state
=
self
.
states
[
"data"
]
else
:
# XXX data can be _'_...
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-closing-tag-but-got-char"
,
"datavars"
: {
"data"
:
data
}})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"bogusComment"
]
return
True
def
tagNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
state
=
self
.
states
[
"beforeAttributeName"
]
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-tag-name"
})
self
.
emitCurrentToken
()
elif
data
==
"/"
:
self
.
state
=
self
.
states
[
"selfClosingStartTag"
]
else
:
self
.
currentToken
[
"name"
]
+=
data
# (Don't use charsUntil here, because tag names are
# very short and it's faster to not do anything fancy)
return
True
def
beforeAttributeNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)
elif
data
in
asciiLetters
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
states
[
"attributeName"
]
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
==
"/"
:
self
.
state
=
self
.
states
[
"selfClosingStartTag"
]
elif
data
==
"'"
or
data
==
'"'
or
data
==
"="
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-character-in-attribute-name"
})
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
states
[
"attributeName"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-attribute-name-but-got-eof"
})
self
.
emitCurrentToken
()
else
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
states
[
"attributeName"
]
return
True
def
attributeNameState
(
self
):
data
=
self
.
stream
.
char
()
leavingThisState
=
True
emitToken
=
False
if
data
==
"="
:
self
.
state
=
self
.
states
[
"beforeAttributeValue"
]
elif
data
in
asciiLetters
:
self
.
currentToken
[
"data"
][
-
1
][
0
]
+=
data
+
\
self
.
stream
.
charsUntil
(
asciiLetters
,
True
)
leavingThisState
=
False
elif
data
==
">"
:
# XXX If we emit here the attributes are converted to a dict
# without being checked and when the code below runs we error
# because data is a dict not a list
emitToken
=
True
elif
data
in
spaceCharacters
:
self
.
state
=
self
.
states
[
"afterAttributeName"
]
elif
data
==
"/"
:
self
.
state
=
self
.
states
[
"selfClosingStartTag"
]
elif
data
==
"'"
or
data
==
'"'
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-character-in-attribute-name"
})
self
.
currentToken
[
"data"
][
-
1
][
0
]
+=
data
leavingThisState
=
False
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-attribute-name"
})
self
.
state
=
self
.
states
[
"data"
]
emitToken
=
True
else
:
self
.
currentToken
[
"data"
][
-
1
][
0
]
+=
data
leavingThisState
=
False
if
leavingThisState
:
# Attributes are not dropped at this stage. That happens when the
# start tag token is emitted so values can still be safely appended
# to attributes, but we do want to report the parse error in time.
if
self
.
lowercaseAttrName
:
self
.
currentToken
[
"data"
][
-
1
][
0
]
=
(
self
.
currentToken
[
"data"
][
-
1
][
0
].
translate
(
asciiUpper2Lower
))
for
name
,
value
in
self
.
currentToken
[
"data"
][:
-
1
]:
if
self
.
currentToken
[
"data"
][
-
1
][
0
]
==
name
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"duplicate-attribute"
})
break
# XXX Fix for above XXX
if
emitToken
:
self
.
emitCurrentToken
()
return
True
def
afterAttributeNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)
elif
data
==
"="
:
self
.
state
=
self
.
states
[
"beforeAttributeValue"
]
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
in
asciiLetters
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
states
[
"attributeName"
]
elif
data
==
"/"
:
self
.
state
=
self
.
states
[
"selfClosingStartTag"
]
elif
data
==
"'"
or
data
==
'"'
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"invalid-character-after-attribute-name"
})
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
states
[
"attributeName"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-end-of-tag-but-got-eof"
})
self
.
emitCurrentToken
()
else
:
self
.
currentToken
[
"data"
].
append
([
data
,
""
])
self
.
state
=
self
.
states
[
"attributeName"
]
return
True
def
beforeAttributeValueState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
stream
.
charsUntil
(
spaceCharacters
,
True
)
elif
data
==
"
\"
"
:
self
.
state
=
self
.
states
[
"attributeValueDoubleQuoted"
]
elif
data
==
"&"
:
self
.
state
=
self
.
states
[
"attributeValueUnQuoted"
]
self
.
stream
.
unget
(
data
);
elif
data
==
"'"
:
self
.
state
=
self
.
states
[
"attributeValueSingleQuoted"
]
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-attribute-value-but-got-right-bracket"
})
self
.
emitCurrentToken
()
elif
data
==
"="
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"equals-in-unquoted-attribute-value"
})
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
self
.
state
=
self
.
states
[
"attributeValueUnQuoted"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-attribute-value-but-got-eof"
})
self
.
emitCurrentToken
()
else
:
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
self
.
state
=
self
.
states
[
"attributeValueUnQuoted"
]
return
True
def
attributeValueDoubleQuotedState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"
\"
"
:
self
.
state
=
self
.
states
[
"afterAttributeValue"
]
elif
data
==
"&"
:
self
.
processEntityInAttribute
(
'"'
)
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-attribute-value-double-quote"
})
self
.
emitCurrentToken
()
else
:
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
+
\
self
.
stream
.
charsUntil
((
"
\"
"
,
"&"
))
return
True
def
attributeValueSingleQuotedState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"'"
:
self
.
state
=
self
.
states
[
"afterAttributeValue"
]
elif
data
==
"&"
:
self
.
processEntityInAttribute
(
"'"
)
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-attribute-value-single-quote"
})
self
.
emitCurrentToken
()
else
:
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
+
\
self
.
stream
.
charsUntil
((
"'"
,
"&"
))
return
True
def
attributeValueUnQuotedState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
state
=
self
.
states
[
"beforeAttributeName"
]
elif
data
==
"&"
:
self
.
processEntityInAttribute
(
None
)
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
==
'"'
or
data
==
"'"
or
data
==
"="
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-character-in-unquoted-attribute-value"
})
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-attribute-value-no-quotes"
})
self
.
emitCurrentToken
()
else
:
self
.
currentToken
[
"data"
][
-
1
][
1
]
+=
data
+
self
.
stream
.
charsUntil
( \
frozenset
((
"&"
,
">"
,
"<"
,
"="
,
"'"
,
'"'
))
|
spaceCharacters
)
return
True
def
afterAttributeValueState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
state
=
self
.
states
[
"beforeAttributeName"
]
elif
data
==
">"
:
self
.
emitCurrentToken
()
elif
data
==
"/"
:
self
.
state
=
self
.
states
[
"selfClosingStartTag"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-EOF-after-attribute-value"
})
self
.
emitCurrentToken
()
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-character-after-attribute-value"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"beforeAttributeName"
]
return
True
def
selfClosingStartTagState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
">"
:
self
.
currentToken
[
"selfClosing"
]
=
True
self
.
emitCurrentToken
()
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-EOF-after-solidus-in-tag"
})
self
.
emitCurrentToken
()
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-character-after-soldius-in-tag"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"beforeAttributeName"
]
return
True
def
bogusCommentState
(
self
):
# Make a new comment token and give it as value all the characters
# until the first > or EOF (charsUntil checks for EOF automatically)
# and emit it.
self
.
tokenQueue
.
append
(
{
"type"
:
tokenTypes
[
"Comment"
],
"data"
:
self
.
stream
.
charsUntil
(
">"
)})
# Eat the character directly after the bogus comment which is either a
# ">" or an EOF.
self
.
stream
.
char
()
self
.
state
=
self
.
states
[
"data"
]
return
True
def
bogusCommentContinuationState
(
self
):
# Like bogusCommentState, but the caller must create the comment token
# and this state just adds more characters to it
self
.
currentToken
[
"data"
]
+=
self
.
stream
.
charsUntil
(
">"
)
self
.
tokenQueue
.
append
(
self
.
currentToken
)
# Eat the character directly after the bogus comment which is either a
# ">" or an EOF.
self
.
stream
.
char
()
self
.
state
=
self
.
states
[
"data"
]
return
True
def
markupDeclarationOpenState
(
self
):
charStack
=
[
self
.
stream
.
char
()]
if
charStack
[
-
1
]
==
"-"
:
charStack
.
append
(
self
.
stream
.
char
())
if
charStack
[
-
1
]
==
"-"
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"Comment"
],
"data"
:
""
}
self
.
state
=
self
.
states
[
"commentStart"
]
return
True
elif
charStack
[
-
1
]
in
(
'd'
,
'D'
):
matched
=
True
for
expected
in
((
'o'
,
'O'
), (
'c'
,
'C'
), (
't'
,
'T'
),
(
'y'
,
'Y'
), (
'p'
,
'P'
), (
'e'
,
'E'
)):
charStack
.
append
(
self
.
stream
.
char
())
if
charStack
[
-
1
]
not
in
expected
:
matched
=
False
break
if
matched
:
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"Doctype"
],
"name"
:
""
,
"publicId"
:
None
,
"systemId"
:
None
,
"correct"
:
True
}
self
.
state
=
self
.
states
[
"doctype"
]
return
True
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-dashes-or-doctype"
})
# charStack[:-2] consists of 'safe' characters ('-', 'd', 'o', etc)
# so they can be copied directly into the bogus comment data, and only
# the last character might be '>' or EOF and needs to be ungetted
self
.
stream
.
unget
(
charStack
.
pop
())
self
.
currentToken
=
{
"type"
:
tokenTypes
[
"Comment"
],
"data"
:
""
.
join
(
charStack
)}
self
.
state
=
self
.
states
[
"bogusCommentContinuation"
]
return
True
def
commentStartState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
state
=
self
.
states
[
"commentStartDash"
]
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"incorrect-comment"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-comment"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
currentToken
[
"data"
]
+=
data
+
self
.
stream
.
charsUntil
(
"-"
)
self
.
state
=
self
.
states
[
"comment"
]
return
True
def
commentStartDashState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
state
=
self
.
states
[
"commentEnd"
]
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"incorrect-comment"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-comment"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
currentToken
[
"data"
]
+=
"-"
+
data
+
self
.
stream
.
charsUntil
(
"-"
)
self
.
state
=
self
.
states
[
"comment"
]
return
True
def
commentState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
state
=
self
.
states
[
"commentEndDash"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-comment"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
currentToken
[
"data"
]
+=
data
+
self
.
stream
.
charsUntil
(
"-"
)
return
True
def
commentEndDashState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"-"
:
self
.
state
=
self
.
states
[
"commentEnd"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-comment-end-dash"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
currentToken
[
"data"
]
+=
"-"
+
data
+
\
self
.
stream
.
charsUntil
(
"-"
)
# Consume the next character which is either a "-" or an EOF as
# well so if there's a "-" directly after the "-" we go nicely to
# the "comment end state" without emitting a ParseError() there.
self
.
stream
.
char
()
return
True
def
commentEndState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
">"
:
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
==
"-"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-dash-after-double-dash-in-comment"
})
self
.
currentToken
[
"data"
]
+=
data
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-comment-double-dash"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
# XXX
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-char-in-comment"
})
self
.
currentToken
[
"data"
]
+=
"--"
+
data
self
.
state
=
self
.
states
[
"comment"
]
return
True
def
doctypeState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
state
=
self
.
states
[
"beforeDoctypeName"
]
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"need-space-after-doctype"
})
self
.
stream
.
unget
(
data
)
self
.
state
=
self
.
states
[
"beforeDoctypeName"
]
return
True
def
beforeDoctypeNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
pass
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-doctype-name-but-got-right-bracket"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-doctype-name-but-got-eof"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
currentToken
[
"name"
]
=
data
self
.
state
=
self
.
states
[
"doctypeName"
]
return
True
def
doctypeNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
self
.
currentToken
[
"name"
]
=
self
.
currentToken
[
"name"
].
translate
(
asciiUpper2Lower
)
self
.
state
=
self
.
states
[
"afterDoctypeName"
]
elif
data
==
">"
:
self
.
currentToken
[
"name"
]
=
self
.
currentToken
[
"name"
].
translate
(
asciiUpper2Lower
)
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-doctype-name"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
currentToken
[
"name"
]
=
self
.
currentToken
[
"name"
].
translate
(
asciiUpper2Lower
)
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
currentToken
[
"name"
]
+=
data
return
True
def
afterDoctypeNameState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
pass
elif
data
==
">"
:
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
currentToken
[
"correct"
]
=
False
self
.
stream
.
unget
(
data
)
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-doctype"
})
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
if
data
in
(
"p"
,
"P"
):
matched
=
True
for
expected
in
((
"u"
,
"U"
), (
"b"
,
"B"
), (
"l"
,
"L"
),
(
"i"
,
"I"
), (
"c"
,
"C"
)):
data
=
self
.
stream
.
char
()
if
data
not
in
expected
:
matched
=
False
break
if
matched
:
self
.
state
=
self
.
states
[
"beforeDoctypePublicIdentifier"
]
return
True
elif
data
in
(
"s"
,
"S"
):
matched
=
True
for
expected
in
((
"y"
,
"Y"
), (
"s"
,
"S"
), (
"t"
,
"T"
),
(
"e"
,
"E"
), (
"m"
,
"M"
)):
data
=
self
.
stream
.
char
()
if
data
not
in
expected
:
matched
=
False
break
if
matched
:
self
.
state
=
self
.
states
[
"beforeDoctypeSystemIdentifier"
]
return
True
# All the characters read before the current 'data' will be
# [a-zA-Z], so they're garbage in the bogus doctype and can be
# discarded; only the latest character might be '>' or EOF
# and needs to be ungetted
self
.
stream
.
unget
(
data
)
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"expected-space-or-right-bracket-in-doctype"
,
"datavars"
:
{
"data"
:
data
}})
self
.
currentToken
[
"correct"
]
=
False
self
.
state
=
self
.
states
[
"bogusDoctype"
]
return
True
def
beforeDoctypePublicIdentifierState
(
self
):
data
=
self
.
stream
.
char
()
if
data
in
spaceCharacters
:
pass
elif
data
==
"
\"
"
:
self
.
currentToken
[
"publicId"
]
=
""
self
.
state
=
self
.
states
[
"doctypePublicIdentifierDoubleQuoted"
]
elif
data
==
"'"
:
self
.
currentToken
[
"publicId"
]
=
""
self
.
state
=
self
.
states
[
"doctypePublicIdentifierSingleQuoted"
]
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-end-of-doctype"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-doctype"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
else
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-char-in-doctype"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
state
=
self
.
states
[
"bogusDoctype"
]
return
True
def
doctypePublicIdentifierDoubleQuotedState
(
self
):
data
=
self
.
stream
.
char
()
if
data
==
"
\"
"
:
self
.
state
=
self
.
states
[
"afterDoctypePublicIdentifier"
]
elif
data
==
">"
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"unexpected-end-of-doctype"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
elif
data
is
EOF
:
self
.
tokenQueue
.
append
({
"type"
:
tokenTypes
[
"ParseError"
],
"data"
:
"eof-in-doctype"
})
self
.
currentToken
[
"correct"
]
=
False
self
.
tokenQueue
.
append
(
self
.
currentToken
)
self
.
state
=
self
.
states
[
"data"
]
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