This repository was archived by the owner on May 5, 2023. It is now read-only.
forked from html5lib/html5lib-python
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy path_tokenizer.py
More file actions
1739 lines (1627 loc) · 75.3 KB
/
Copy path_tokenizer.py
File metadata and controls
1739 lines (1627 loc) · 75.3 KB
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# SPDX-FileCopyrightText: 2006-2021 html5lib contributors. See AUTHORS.rst
#
# SPDX-License-Identifier: MIT
from __future__ import absolute_import, division, unicode_literals
from six import unichr as chr
from collections import deque, OrderedDict
from sys import version_info
from .constants import spaceCharacters
from .constants import entities
from .constants import asciiLetters, asciiUpper2Lower
from .constants import digits, hexDigits, EOF
from .constants import tokenTypes, tagTokenTypes
from .constants import replacementCharacters
from ._inputstream import HTMLInputStream
from ._trie import Trie
entitiesTrie = Trie(entities)
if version_info >= (3, 7):
attributeMap = dict
else:
attributeMap = OrderedDict
class HTMLTokenizer(object):
""" 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.stream
Points to HTMLInputStream object.
"""
def __init__(self, stream, parser=None, **kwargs):
self.stream = HTMLInputStream(stream, **kwargs)
self.parser = parser
# Setup the initial tokenizer state
self.escapeFlag = False
self.lastFourChars = []
self.state = self.dataState
self.escape = False
# The current token being created
self.currentToken = None
super(HTMLTokenizer, self).__init__()
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)
# Certain characters get replaced with others
if charAsInt in replacementCharacters:
char = replacementCharacters[charAsInt]
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"illegal-codepoint-for-numeric-entity",
"datavars": {"charAsInt": charAsInt}})
elif ((0xD800 <= charAsInt <= 0xDFFF) or
(charAsInt > 0x10FFFF)):
char = "\uFFFD"
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"illegal-codepoint-for-numeric-entity",
"datavars": {"charAsInt": charAsInt}})
else:
# Should speed up this check somehow (e.g. move the set to a constant)
if ((0x0001 <= charAsInt <= 0x0008) or
(0x000E <= charAsInt <= 0x001F) or
(0x007F <= charAsInt <= 0x009F) or
(0xFDD0 <= charAsInt <= 0xFDEF) or
charAsInt in frozenset([0x000B, 0xFFFE, 0xFFFF, 0x1FFFE,
0x1FFFF, 0x2FFFE, 0x2FFFF, 0x3FFFE,
0x3FFFF, 0x4FFFE, 0x4FFFF, 0x5FFFE,
0x5FFFF, 0x6FFFE, 0x6FFFF, 0x7FFFE,
0x7FFFF, 0x8FFFE, 0x8FFFF, 0x9FFFE,
0x9FFFF, 0xAFFFE, 0xAFFFF, 0xBFFFE,
0xBFFFF, 0xCFFFE, 0xCFFFF, 0xDFFFE,
0xDFFFF, 0xEFFFE, 0xEFFFF, 0xFFFFE,
0xFFFFF, 0x10FFFE, 0x10FFFF])):
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data":
"illegal-codepoint-for-numeric-entity",
"datavars": {"charAsInt": charAsInt}})
try:
# Try/except needed as UCS-2 Python builds' unichar only works
# within the BMP.
char = chr(charAsInt)
except ValueError:
v = charAsInt - 0x10000
char = chr(0xD800 | (v >> 10)) + chr(0xDC00 | (v & 0x3FF))
# 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.
while (charStack[-1] is not EOF):
if not entitiesTrie.has_keys_with_prefix("".join(charStack)):
break
charStack.append(self.stream.char())
# At this point we have a string that starts with some characters
# that may match an entity
# Try to find the longest entity the string will match to take care
# of ¬i for instance.
try:
entityName = entitiesTrie.longest_prefix("".join(charStack[:-1]))
entityLength = len(entityName)
except KeyError:
entityName = None
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 or
charStack[entityLength] == "=")):
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:
if output in spaceCharacters:
tokenType = "SpaceCharacters"
else:
tokenType = "Characters"
self.tokenQueue.append({"type": tokenTypes[tokenType], "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 tagTokenTypes):
token["name"] = token["name"].translate(asciiUpper2Lower)
if token["type"] == tokenTypes["StartTag"]:
raw = token["data"]
data = attributeMap(raw)
if len(raw) > len(data):
# we had some duplicated attribute, fix so first wins
data.update(raw[::-1])
token["data"] = data
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.dataState
# Below are the various tokenizer states worked out.
def dataState(self):
data = self.stream.char()
if data == "&":
self.state = self.entityDataState
elif data == "<":
self.state = self.tagOpenState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\u0000"})
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:
chars = self.stream.charsUntil(("&", "<", "\u0000"))
self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
data + chars})
return True
def entityDataState(self):
self.consumeEntity()
self.state = self.dataState
return True
def rcdataState(self):
data = self.stream.char()
if data == "&":
self.state = self.characterReferenceInRcdata
elif data == "<":
self.state = self.rcdataLessThanSignState
elif data == EOF:
# Tokenization ends.
return False
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
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:
chars = self.stream.charsUntil(("&", "<", "\u0000"))
self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
data + chars})
return True
def characterReferenceInRcdata(self):
self.consumeEntity()
self.state = self.rcdataState
return True
def rawtextState(self):
data = self.stream.char()
if data == "<":
self.state = self.rawtextLessThanSignState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
elif data == EOF:
# Tokenization ends.
return False
else:
chars = self.stream.charsUntil(("<", "\u0000"))
self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
data + chars})
return True
def scriptDataState(self):
data = self.stream.char()
if data == "<":
self.state = self.scriptDataLessThanSignState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
elif data == EOF:
# Tokenization ends.
return False
else:
chars = self.stream.charsUntil(("<", "\u0000"))
self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
data + chars})
return True
def plaintextState(self):
data = self.stream.char()
if data == EOF:
# Tokenization ends.
return False
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
data + self.stream.charsUntil("\u0000")})
return True
def tagOpenState(self):
data = self.stream.char()
if data == "!":
self.state = self.markupDeclarationOpenState
elif data == "/":
self.state = self.closeTagOpenState
elif data in asciiLetters:
self.currentToken = {"type": tokenTypes["StartTag"],
"name": data, "data": [],
"selfClosing": False,
"selfClosingAcknowledged": False}
self.state = self.tagNameState
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.dataState
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.bogusCommentState
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.dataState
return True
def closeTagOpenState(self):
data = self.stream.char()
if data in asciiLetters:
self.currentToken = {"type": tokenTypes["EndTag"], "name": data,
"data": [], "selfClosing": False}
self.state = self.tagNameState
elif data == ">":
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"expected-closing-tag-but-got-right-bracket"})
self.state = self.dataState
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.dataState
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.bogusCommentState
return True
def tagNameState(self):
data = self.stream.char()
if data in spaceCharacters:
self.state = self.beforeAttributeNameState
elif data == ">":
self.emitCurrentToken()
elif data is EOF:
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"eof-in-tag-name"})
self.state = self.dataState
elif data == "/":
self.state = self.selfClosingStartTagState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.currentToken["name"] += "\uFFFD"
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 rcdataLessThanSignState(self):
data = self.stream.char()
if data == "/":
self.temporaryBuffer = ""
self.state = self.rcdataEndTagOpenState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
self.stream.unget(data)
self.state = self.rcdataState
return True
def rcdataEndTagOpenState(self):
data = self.stream.char()
if data in asciiLetters:
self.temporaryBuffer += data
self.state = self.rcdataEndTagNameState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
self.stream.unget(data)
self.state = self.rcdataState
return True
def rcdataEndTagNameState(self):
appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
data = self.stream.char()
if data in spaceCharacters and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.beforeAttributeNameState
elif data == "/" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.selfClosingStartTagState
elif data == ">" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.emitCurrentToken()
self.state = self.dataState
elif data in asciiLetters:
self.temporaryBuffer += data
else:
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "</" + self.temporaryBuffer})
self.stream.unget(data)
self.state = self.rcdataState
return True
def rawtextLessThanSignState(self):
data = self.stream.char()
if data == "/":
self.temporaryBuffer = ""
self.state = self.rawtextEndTagOpenState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
self.stream.unget(data)
self.state = self.rawtextState
return True
def rawtextEndTagOpenState(self):
data = self.stream.char()
if data in asciiLetters:
self.temporaryBuffer += data
self.state = self.rawtextEndTagNameState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
self.stream.unget(data)
self.state = self.rawtextState
return True
def rawtextEndTagNameState(self):
appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
data = self.stream.char()
if data in spaceCharacters and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.beforeAttributeNameState
elif data == "/" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.selfClosingStartTagState
elif data == ">" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.emitCurrentToken()
self.state = self.dataState
elif data in asciiLetters:
self.temporaryBuffer += data
else:
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "</" + self.temporaryBuffer})
self.stream.unget(data)
self.state = self.rawtextState
return True
def scriptDataLessThanSignState(self):
data = self.stream.char()
if data == "/":
self.temporaryBuffer = ""
self.state = self.scriptDataEndTagOpenState
elif data == "!":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<!"})
self.state = self.scriptDataEscapeStartState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
self.stream.unget(data)
self.state = self.scriptDataState
return True
def scriptDataEndTagOpenState(self):
data = self.stream.char()
if data in asciiLetters:
self.temporaryBuffer += data
self.state = self.scriptDataEndTagNameState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
self.stream.unget(data)
self.state = self.scriptDataState
return True
def scriptDataEndTagNameState(self):
appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
data = self.stream.char()
if data in spaceCharacters and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.beforeAttributeNameState
elif data == "/" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.selfClosingStartTagState
elif data == ">" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.emitCurrentToken()
self.state = self.dataState
elif data in asciiLetters:
self.temporaryBuffer += data
else:
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "</" + self.temporaryBuffer})
self.stream.unget(data)
self.state = self.scriptDataState
return True
def scriptDataEscapeStartState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
self.state = self.scriptDataEscapeStartDashState
else:
self.stream.unget(data)
self.state = self.scriptDataState
return True
def scriptDataEscapeStartDashState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
self.state = self.scriptDataEscapedDashDashState
else:
self.stream.unget(data)
self.state = self.scriptDataState
return True
def scriptDataEscapedState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
self.state = self.scriptDataEscapedDashState
elif data == "<":
self.state = self.scriptDataEscapedLessThanSignState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
elif data == EOF:
self.state = self.dataState
else:
chars = self.stream.charsUntil(("<", "-", "\u0000"))
self.tokenQueue.append({"type": tokenTypes["Characters"], "data":
data + chars})
return True
def scriptDataEscapedDashState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
self.state = self.scriptDataEscapedDashDashState
elif data == "<":
self.state = self.scriptDataEscapedLessThanSignState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
self.state = self.scriptDataEscapedState
elif data == EOF:
self.state = self.dataState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
self.state = self.scriptDataEscapedState
return True
def scriptDataEscapedDashDashState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
elif data == "<":
self.state = self.scriptDataEscapedLessThanSignState
elif data == ">":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
self.state = self.scriptDataState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
self.state = self.scriptDataEscapedState
elif data == EOF:
self.state = self.dataState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
self.state = self.scriptDataEscapedState
return True
def scriptDataEscapedLessThanSignState(self):
data = self.stream.char()
if data == "/":
self.temporaryBuffer = ""
self.state = self.scriptDataEscapedEndTagOpenState
elif data in asciiLetters:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<" + data})
self.temporaryBuffer = data
self.state = self.scriptDataDoubleEscapeStartState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
self.stream.unget(data)
self.state = self.scriptDataEscapedState
return True
def scriptDataEscapedEndTagOpenState(self):
data = self.stream.char()
if data in asciiLetters:
self.temporaryBuffer = data
self.state = self.scriptDataEscapedEndTagNameState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "</"})
self.stream.unget(data)
self.state = self.scriptDataEscapedState
return True
def scriptDataEscapedEndTagNameState(self):
appropriate = self.currentToken and self.currentToken["name"].lower() == self.temporaryBuffer.lower()
data = self.stream.char()
if data in spaceCharacters and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.beforeAttributeNameState
elif data == "/" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.state = self.selfClosingStartTagState
elif data == ">" and appropriate:
self.currentToken = {"type": tokenTypes["EndTag"],
"name": self.temporaryBuffer,
"data": [], "selfClosing": False}
self.emitCurrentToken()
self.state = self.dataState
elif data in asciiLetters:
self.temporaryBuffer += data
else:
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "</" + self.temporaryBuffer})
self.stream.unget(data)
self.state = self.scriptDataEscapedState
return True
def scriptDataDoubleEscapeStartState(self):
data = self.stream.char()
if data in (spaceCharacters | frozenset(("/", ">"))):
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
if self.temporaryBuffer.lower() == "script":
self.state = self.scriptDataDoubleEscapedState
else:
self.state = self.scriptDataEscapedState
elif data in asciiLetters:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
self.temporaryBuffer += data
else:
self.stream.unget(data)
self.state = self.scriptDataEscapedState
return True
def scriptDataDoubleEscapedState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
self.state = self.scriptDataDoubleEscapedDashState
elif data == "<":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
self.state = self.scriptDataDoubleEscapedLessThanSignState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
elif data == EOF:
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"eof-in-script-in-script"})
self.state = self.dataState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
return True
def scriptDataDoubleEscapedDashState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
self.state = self.scriptDataDoubleEscapedDashDashState
elif data == "<":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
self.state = self.scriptDataDoubleEscapedLessThanSignState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
self.state = self.scriptDataDoubleEscapedState
elif data == EOF:
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"eof-in-script-in-script"})
self.state = self.dataState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
self.state = self.scriptDataDoubleEscapedState
return True
def scriptDataDoubleEscapedDashDashState(self):
data = self.stream.char()
if data == "-":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "-"})
elif data == "<":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "<"})
self.state = self.scriptDataDoubleEscapedLessThanSignState
elif data == ">":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": ">"})
self.state = self.scriptDataState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.tokenQueue.append({"type": tokenTypes["Characters"],
"data": "\uFFFD"})
self.state = self.scriptDataDoubleEscapedState
elif data == EOF:
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"eof-in-script-in-script"})
self.state = self.dataState
else:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
self.state = self.scriptDataDoubleEscapedState
return True
def scriptDataDoubleEscapedLessThanSignState(self):
data = self.stream.char()
if data == "/":
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": "/"})
self.temporaryBuffer = ""
self.state = self.scriptDataDoubleEscapeEndState
else:
self.stream.unget(data)
self.state = self.scriptDataDoubleEscapedState
return True
def scriptDataDoubleEscapeEndState(self):
data = self.stream.char()
if data in (spaceCharacters | frozenset(("/", ">"))):
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
if self.temporaryBuffer.lower() == "script":
self.state = self.scriptDataEscapedState
else:
self.state = self.scriptDataDoubleEscapedState
elif data in asciiLetters:
self.tokenQueue.append({"type": tokenTypes["Characters"], "data": data})
self.temporaryBuffer += data
else:
self.stream.unget(data)
self.state = self.scriptDataDoubleEscapedState
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.attributeNameState
elif data == ">":
self.emitCurrentToken()
elif data == "/":
self.state = self.selfClosingStartTagState
elif data in ("'", '"', "=", "<"):
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"invalid-character-in-attribute-name"})
self.currentToken["data"].append([data, ""])
self.state = self.attributeNameState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.currentToken["data"].append(["\uFFFD", ""])
self.state = self.attributeNameState
elif data is EOF:
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"expected-attribute-name-but-got-eof"})
self.state = self.dataState
else:
self.currentToken["data"].append([data, ""])
self.state = self.attributeNameState
return True
def attributeNameState(self):
data = self.stream.char()
leavingThisState = True
emitToken = False
if data == "=":
self.state = self.beforeAttributeValueState
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.afterAttributeNameState
elif data == "/":
self.state = self.selfClosingStartTagState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.currentToken["data"][-1][0] += "\uFFFD"
leavingThisState = False
elif data in ("'", '"', "<"):
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.dataState
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.
self.currentToken["data"][-1][0] = (
self.currentToken["data"][-1][0].translate(asciiUpper2Lower))
for name, _ 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.beforeAttributeValueState
elif data == ">":
self.emitCurrentToken()
elif data in asciiLetters:
self.currentToken["data"].append([data, ""])
self.state = self.attributeNameState
elif data == "/":
self.state = self.selfClosingStartTagState
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.currentToken["data"].append(["\uFFFD", ""])
self.state = self.attributeNameState
elif data in ("'", '"', "<"):
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"invalid-character-after-attribute-name"})
self.currentToken["data"].append([data, ""])
self.state = self.attributeNameState
elif data is EOF:
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"expected-end-of-tag-but-got-eof"})
self.state = self.dataState
else:
self.currentToken["data"].append([data, ""])
self.state = self.attributeNameState
return True
def beforeAttributeValueState(self):
data = self.stream.char()
if data in spaceCharacters:
self.stream.charsUntil(spaceCharacters, True)
elif data == "\"":
self.state = self.attributeValueDoubleQuotedState
elif data == "&":
self.state = self.attributeValueUnQuotedState
self.stream.unget(data)
elif data == "'":
self.state = self.attributeValueSingleQuotedState
elif data == ">":
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"expected-attribute-value-but-got-right-bracket"})
self.emitCurrentToken()
elif data == "\u0000":
self.tokenQueue.append({"type": tokenTypes["ParseError"],
"data": "invalid-codepoint"})
self.currentToken["data"][-1][1] += "\uFFFD"
self.state = self.attributeValueUnQuotedState
elif data in ("=", "<", "`"):
self.tokenQueue.append({"type": tokenTypes["ParseError"], "data":
"equals-in-unquoted-attribute-value"})
self.currentToken["data"][-1][1] += data