Spaces:
Running
Running
File size: 67,537 Bytes
1d777c4 |
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 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 |
# coding: utf-8
# Emitter expects events obeying the following grammar:
# stream ::= STREAM-START document* STREAM-END
# document ::= DOCUMENT-START node DOCUMENT-END
# node ::= SCALAR | sequence | mapping
# sequence ::= SEQUENCE-START node* SEQUENCE-END
# mapping ::= MAPPING-START (node node)* MAPPING-END
import sys
from ruamel.yaml.error import YAMLError, YAMLStreamError
from ruamel.yaml.events import * # NOQA
# fmt: off
from ruamel.yaml.compat import _F, nprint, dbg, DBG_EVENT, \
check_anchorname_char, nprintf # NOQA
# fmt: on
if False: # MYPY
from typing import Any, Dict, List, Union, Text, Tuple, Optional # NOQA
from ruamel.yaml.compat import StreamType # NOQA
__all__ = ['Emitter', 'EmitterError']
class EmitterError(YAMLError):
pass
class ScalarAnalysis:
def __init__(
self,
scalar,
empty,
multiline,
allow_flow_plain,
allow_block_plain,
allow_single_quoted,
allow_double_quoted,
allow_block,
):
# type: (Any, Any, Any, bool, bool, bool, bool, bool) -> None
self.scalar = scalar
self.empty = empty
self.multiline = multiline
self.allow_flow_plain = allow_flow_plain
self.allow_block_plain = allow_block_plain
self.allow_single_quoted = allow_single_quoted
self.allow_double_quoted = allow_double_quoted
self.allow_block = allow_block
class Indents:
# replacement for the list based stack of None/int
def __init__(self):
# type: () -> None
self.values = [] # type: List[Tuple[Any, bool]]
def append(self, val, seq):
# type: (Any, Any) -> None
self.values.append((val, seq))
def pop(self):
# type: () -> Any
return self.values.pop()[0]
def last_seq(self):
# type: () -> bool
# return the seq(uence) value for the element added before the last one
# in increase_indent()
try:
return self.values[-2][1]
except IndexError:
return False
def seq_flow_align(self, seq_indent, column, pre_comment=False):
# type: (int, int, Optional[bool]) -> int
# extra spaces because of dash
# nprint('seq_flow_align', self.values, pre_comment)
if len(self.values) < 2 or not self.values[-1][1]:
if len(self.values) == 0 or not pre_comment:
return 0
base = self.values[-1][0] if self.values[-1][0] is not None else 0
if pre_comment:
return base + seq_indent # type: ignore
# return (len(self.values)) * seq_indent
# -1 for the dash
return base + seq_indent - column - 1 # type: ignore
def __len__(self):
# type: () -> int
return len(self.values)
class Emitter:
# fmt: off
DEFAULT_TAG_PREFIXES = {
'!': '!',
'tag:yaml.org,2002:': '!!',
}
# fmt: on
MAX_SIMPLE_KEY_LENGTH = 128
def __init__(
self,
stream,
canonical=None,
indent=None,
width=None,
allow_unicode=None,
line_break=None,
block_seq_indent=None,
top_level_colon_align=None,
prefix_colon=None,
brace_single_entry_mapping_in_flow_sequence=None,
dumper=None,
):
# type: (StreamType, Any, Optional[int], Optional[int], Optional[bool], Any, Optional[int], Optional[bool], Any, Optional[bool], Any) -> None # NOQA
self.dumper = dumper
if self.dumper is not None and getattr(self.dumper, '_emitter', None) is None:
self.dumper._emitter = self
self.stream = stream
# Encoding can be overriden by STREAM-START.
self.encoding = None # type: Optional[Text]
self.allow_space_break = None
# Emitter is a state machine with a stack of states to handle nested
# structures.
self.states = [] # type: List[Any]
self.state = self.expect_stream_start # type: Any
# Current event and the event queue.
self.events = [] # type: List[Any]
self.event = None # type: Any
# The current indentation level and the stack of previous indents.
self.indents = Indents()
self.indent = None # type: Optional[int]
# flow_context is an expanding/shrinking list consisting of '{' and '['
# for each unclosed flow context. If empty list that means block context
self.flow_context = [] # type: List[Text]
# Contexts.
self.root_context = False
self.sequence_context = False
self.mapping_context = False
self.simple_key_context = False
# Characteristics of the last emitted character:
# - current position.
# - is it a whitespace?
# - is it an indention character
# (indentation space, '-', '?', or ':')?
self.line = 0
self.column = 0
self.whitespace = True
self.indention = True
self.compact_seq_seq = True # dash after dash
self.compact_seq_map = True # key after dash
# self.compact_ms = False # dash after key, only when excplicit key with ?
self.no_newline = None # type: Optional[bool] # set if directly after `- `
# Whether the document requires an explicit document end indicator
self.open_ended = False
# colon handling
self.colon = ':'
self.prefixed_colon = self.colon if prefix_colon is None else prefix_colon + self.colon
# single entry mappings in flow sequence
self.brace_single_entry_mapping_in_flow_sequence = (
brace_single_entry_mapping_in_flow_sequence # NOQA
)
# Formatting details.
self.canonical = canonical
self.allow_unicode = allow_unicode
# set to False to get "\Uxxxxxxxx" for non-basic unicode like emojis
self.unicode_supplementary = sys.maxunicode > 0xFFFF
self.sequence_dash_offset = block_seq_indent if block_seq_indent else 0
self.top_level_colon_align = top_level_colon_align
self.best_sequence_indent = 2
self.requested_indent = indent # specific for literal zero indent
if indent and 1 < indent < 10:
self.best_sequence_indent = indent
self.best_map_indent = self.best_sequence_indent
# if self.best_sequence_indent < self.sequence_dash_offset + 1:
# self.best_sequence_indent = self.sequence_dash_offset + 1
self.best_width = 80
if width and width > self.best_sequence_indent * 2:
self.best_width = width
self.best_line_break = '\n' # type: Any
if line_break in ['\r', '\n', '\r\n']:
self.best_line_break = line_break
# Tag prefixes.
self.tag_prefixes = None # type: Any
# Prepared anchor and tag.
self.prepared_anchor = None # type: Any
self.prepared_tag = None # type: Any
# Scalar analysis and style.
self.analysis = None # type: Any
self.style = None # type: Any
self.scalar_after_indicator = True # write a scalar on the same line as `---`
self.alt_null = 'null'
@property
def stream(self):
# type: () -> Any
try:
return self._stream
except AttributeError:
raise YAMLStreamError('output stream needs to specified')
@stream.setter
def stream(self, val):
# type: (Any) -> None
if val is None:
return
if not hasattr(val, 'write'):
raise YAMLStreamError('stream argument needs to have a write() method')
self._stream = val
@property
def serializer(self):
# type: () -> Any
try:
if hasattr(self.dumper, 'typ'):
return self.dumper.serializer
return self.dumper._serializer
except AttributeError:
return self # cyaml
@property
def flow_level(self):
# type: () -> int
return len(self.flow_context)
def dispose(self):
# type: () -> None
# Reset the state attributes (to clear self-references)
self.states = []
self.state = None
def emit(self, event):
# type: (Any) -> None
if dbg(DBG_EVENT):
nprint(event)
self.events.append(event)
while not self.need_more_events():
self.event = self.events.pop(0)
self.state()
self.event = None
# In some cases, we wait for a few next events before emitting.
def need_more_events(self):
# type: () -> bool
if not self.events:
return True
event = self.events[0]
if isinstance(event, DocumentStartEvent):
return self.need_events(1)
elif isinstance(event, SequenceStartEvent):
return self.need_events(2)
elif isinstance(event, MappingStartEvent):
return self.need_events(3)
else:
return False
def need_events(self, count):
# type: (int) -> bool
level = 0
for event in self.events[1:]:
if isinstance(event, (DocumentStartEvent, CollectionStartEvent)):
level += 1
elif isinstance(event, (DocumentEndEvent, CollectionEndEvent)):
level -= 1
elif isinstance(event, StreamEndEvent):
level = -1
if level < 0:
return False
return len(self.events) < count + 1
def increase_indent(self, flow=False, sequence=None, indentless=False):
# type: (bool, Optional[bool], bool) -> None
self.indents.append(self.indent, sequence)
if self.indent is None: # top level
if flow:
# self.indent = self.best_sequence_indent if self.indents.last_seq() else \
# self.best_map_indent
# self.indent = self.best_sequence_indent
self.indent = self.requested_indent
else:
self.indent = 0
elif not indentless:
self.indent += (
self.best_sequence_indent if self.indents.last_seq() else self.best_map_indent
)
# if self.indents.last_seq():
# if self.indent == 0: # top level block sequence
# self.indent = self.best_sequence_indent - self.sequence_dash_offset
# else:
# self.indent += self.best_sequence_indent
# else:
# self.indent += self.best_map_indent
# States.
# Stream handlers.
def expect_stream_start(self):
# type: () -> None
if isinstance(self.event, StreamStartEvent):
if self.event.encoding and not hasattr(self.stream, 'encoding'):
self.encoding = self.event.encoding
self.write_stream_start()
self.state = self.expect_first_document_start
else:
raise EmitterError(
_F('expected StreamStartEvent, but got {self_event!s}', self_event=self.event)
)
def expect_nothing(self):
# type: () -> None
raise EmitterError(
_F('expected nothing, but got {self_event!s}', self_event=self.event)
)
# Document handlers.
def expect_first_document_start(self):
# type: () -> Any
return self.expect_document_start(first=True)
def expect_document_start(self, first=False):
# type: (bool) -> None
if isinstance(self.event, DocumentStartEvent):
if (self.event.version or self.event.tags) and self.open_ended:
self.write_indicator('...', True)
self.write_indent()
if self.event.version:
version_text = self.prepare_version(self.event.version)
self.write_version_directive(version_text)
self.tag_prefixes = self.DEFAULT_TAG_PREFIXES.copy()
if self.event.tags:
handles = sorted(self.event.tags.keys())
for handle in handles:
prefix = self.event.tags[handle]
self.tag_prefixes[prefix] = handle
handle_text = self.prepare_tag_handle(handle)
prefix_text = self.prepare_tag_prefix(prefix)
self.write_tag_directive(handle_text, prefix_text)
implicit = (
first
and not self.event.explicit
and not self.canonical
and not self.event.version
and not self.event.tags
and not self.check_empty_document()
)
if not implicit:
self.write_indent()
self.write_indicator('---', True)
if self.canonical:
self.write_indent()
self.state = self.expect_document_root
elif isinstance(self.event, StreamEndEvent):
if self.open_ended:
self.write_indicator('...', True)
self.write_indent()
self.write_stream_end()
self.state = self.expect_nothing
else:
raise EmitterError(
_F(
'expected DocumentStartEvent, but got {self_event!s}',
self_event=self.event,
)
)
def expect_document_end(self):
# type: () -> None
if isinstance(self.event, DocumentEndEvent):
self.write_indent()
if self.event.explicit:
self.write_indicator('...', True)
self.write_indent()
self.flush_stream()
self.state = self.expect_document_start
else:
raise EmitterError(
_F('expected DocumentEndEvent, but got {self_event!s}', self_event=self.event)
)
def expect_document_root(self):
# type: () -> None
self.states.append(self.expect_document_end)
self.expect_node(root=True)
# Node handlers.
def expect_node(self, root=False, sequence=False, mapping=False, simple_key=False):
# type: (bool, bool, bool, bool) -> None
self.root_context = root
self.sequence_context = sequence # not used in PyYAML
force_flow_indent = False
self.mapping_context = mapping
self.simple_key_context = simple_key
if isinstance(self.event, AliasEvent):
self.expect_alias()
elif isinstance(self.event, (ScalarEvent, CollectionStartEvent)):
if (
self.process_anchor('&')
and isinstance(self.event, ScalarEvent)
and self.sequence_context
):
self.sequence_context = False
if (
root
and isinstance(self.event, ScalarEvent)
and not self.scalar_after_indicator
):
self.write_indent()
self.process_tag()
if isinstance(self.event, ScalarEvent):
# nprint('@', self.indention, self.no_newline, self.column)
self.expect_scalar()
elif isinstance(self.event, SequenceStartEvent):
# nprint('@', self.indention, self.no_newline, self.column)
i2, n2 = self.indention, self.no_newline # NOQA
if self.event.comment:
if self.event.flow_style is False:
if self.write_post_comment(self.event):
self.indention = False
self.no_newline = True
if self.event.flow_style:
column = self.column
if self.write_pre_comment(self.event):
if self.event.flow_style:
# force_flow_indent = True
force_flow_indent = not self.indents.values[-1][1]
self.indention = i2
self.no_newline = not self.indention
if self.event.flow_style:
self.column = column
if (
self.flow_level
or self.canonical
or self.event.flow_style
or self.check_empty_sequence()
):
self.expect_flow_sequence(force_flow_indent)
else:
self.expect_block_sequence()
elif isinstance(self.event, MappingStartEvent):
if self.event.flow_style is False and self.event.comment:
self.write_post_comment(self.event)
if self.event.comment and self.event.comment[1]:
self.write_pre_comment(self.event)
if self.event.flow_style:
force_flow_indent = not self.indents.values[-1][1]
if (
self.flow_level
or self.canonical
or self.event.flow_style
or self.check_empty_mapping()
):
self.expect_flow_mapping(single=self.event.nr_items == 1,
force_flow_indent=force_flow_indent)
else:
self.expect_block_mapping()
else:
raise EmitterError(
_F('expected NodeEvent, but got {self_event!s}', self_event=self.event)
)
def expect_alias(self):
# type: () -> None
if self.event.anchor is None:
raise EmitterError('anchor is not specified for alias')
self.process_anchor('*')
self.state = self.states.pop()
def expect_scalar(self):
# type: () -> None
self.increase_indent(flow=True)
self.process_scalar()
self.indent = self.indents.pop()
self.state = self.states.pop()
# Flow sequence handlers.
def expect_flow_sequence(self, force_flow_indent=False):
# type: (Optional[bool]) -> None
if force_flow_indent:
self.increase_indent(flow=True, sequence=True)
ind = self.indents.seq_flow_align(self.best_sequence_indent, self.column,
force_flow_indent)
self.write_indicator(' ' * ind + '[', True, whitespace=True)
if not force_flow_indent:
self.increase_indent(flow=True, sequence=True)
self.flow_context.append('[')
self.state = self.expect_first_flow_sequence_item
def expect_first_flow_sequence_item(self):
# type: () -> None
if isinstance(self.event, SequenceEndEvent):
self.indent = self.indents.pop()
popped = self.flow_context.pop()
assert popped == '['
self.write_indicator(']', False)
if self.event.comment and self.event.comment[0]:
# eol comment on empty flow sequence
self.write_post_comment(self.event)
elif self.flow_level == 0:
self.write_line_break()
self.state = self.states.pop()
else:
if self.canonical or self.column > self.best_width:
self.write_indent()
self.states.append(self.expect_flow_sequence_item)
self.expect_node(sequence=True)
def expect_flow_sequence_item(self):
# type: () -> None
if isinstance(self.event, SequenceEndEvent):
self.indent = self.indents.pop()
popped = self.flow_context.pop()
assert popped == '['
if self.canonical:
self.write_indicator(',', False)
self.write_indent()
self.write_indicator(']', False)
if self.event.comment and self.event.comment[0]:
# eol comment on flow sequence
self.write_post_comment(self.event)
else:
self.no_newline = False
self.state = self.states.pop()
else:
self.write_indicator(',', False)
if self.canonical or self.column > self.best_width:
self.write_indent()
self.states.append(self.expect_flow_sequence_item)
self.expect_node(sequence=True)
# Flow mapping handlers.
def expect_flow_mapping(self, single=False, force_flow_indent=False):
# type: (Optional[bool], Optional[bool]) -> None
if force_flow_indent:
self.increase_indent(flow=True, sequence=False)
ind = self.indents.seq_flow_align(self.best_sequence_indent, self.column,
force_flow_indent)
map_init = '{'
if (
single
and self.flow_level
and self.flow_context[-1] == '['
and not self.canonical
and not self.brace_single_entry_mapping_in_flow_sequence
):
# single map item with flow context, no curly braces necessary
map_init = ''
self.write_indicator(' ' * ind + map_init, True, whitespace=True)
self.flow_context.append(map_init)
if not force_flow_indent:
self.increase_indent(flow=True, sequence=False)
self.state = self.expect_first_flow_mapping_key
def expect_first_flow_mapping_key(self):
# type: () -> None
if isinstance(self.event, MappingEndEvent):
self.indent = self.indents.pop()
popped = self.flow_context.pop()
assert popped == '{' # empty flow mapping
self.write_indicator('}', False)
if self.event.comment and self.event.comment[0]:
# eol comment on empty mapping
self.write_post_comment(self.event)
elif self.flow_level == 0:
self.write_line_break()
self.state = self.states.pop()
else:
if self.canonical or self.column > self.best_width:
self.write_indent()
if not self.canonical and self.check_simple_key():
self.states.append(self.expect_flow_mapping_simple_value)
self.expect_node(mapping=True, simple_key=True)
else:
self.write_indicator('?', True)
self.states.append(self.expect_flow_mapping_value)
self.expect_node(mapping=True)
def expect_flow_mapping_key(self):
# type: () -> None
if isinstance(self.event, MappingEndEvent):
# if self.event.comment and self.event.comment[1]:
# self.write_pre_comment(self.event)
self.indent = self.indents.pop()
popped = self.flow_context.pop()
assert popped in ['{', '']
if self.canonical:
self.write_indicator(',', False)
self.write_indent()
if popped != '':
self.write_indicator('}', False)
if self.event.comment and self.event.comment[0]:
# eol comment on flow mapping, never reached on empty mappings
self.write_post_comment(self.event)
else:
self.no_newline = False
self.state = self.states.pop()
else:
self.write_indicator(',', False)
if self.canonical or self.column > self.best_width:
self.write_indent()
if not self.canonical and self.check_simple_key():
self.states.append(self.expect_flow_mapping_simple_value)
self.expect_node(mapping=True, simple_key=True)
else:
self.write_indicator('?', True)
self.states.append(self.expect_flow_mapping_value)
self.expect_node(mapping=True)
def expect_flow_mapping_simple_value(self):
# type: () -> None
self.write_indicator(self.prefixed_colon, False)
self.states.append(self.expect_flow_mapping_key)
self.expect_node(mapping=True)
def expect_flow_mapping_value(self):
# type: () -> None
if self.canonical or self.column > self.best_width:
self.write_indent()
self.write_indicator(self.prefixed_colon, True)
self.states.append(self.expect_flow_mapping_key)
self.expect_node(mapping=True)
# Block sequence handlers.
def expect_block_sequence(self):
# type: () -> None
if self.mapping_context:
indentless = not self.indention
else:
indentless = False
if not self.compact_seq_seq and self.column != 0:
self.write_line_break()
self.increase_indent(flow=False, sequence=True, indentless=indentless)
self.state = self.expect_first_block_sequence_item
def expect_first_block_sequence_item(self):
# type: () -> Any
return self.expect_block_sequence_item(first=True)
def expect_block_sequence_item(self, first=False):
# type: (bool) -> None
if not first and isinstance(self.event, SequenceEndEvent):
if self.event.comment and self.event.comment[1]:
# final comments on a block list e.g. empty line
self.write_pre_comment(self.event)
self.indent = self.indents.pop()
self.state = self.states.pop()
self.no_newline = False
else:
if self.event.comment and self.event.comment[1]:
self.write_pre_comment(self.event)
nonl = self.no_newline if self.column == 0 else False
self.write_indent()
ind = self.sequence_dash_offset # if len(self.indents) > 1 else 0
self.write_indicator(' ' * ind + '-', True, indention=True)
if nonl or self.sequence_dash_offset + 2 > self.best_sequence_indent:
self.no_newline = True
self.states.append(self.expect_block_sequence_item)
self.expect_node(sequence=True)
# Block mapping handlers.
def expect_block_mapping(self):
# type: () -> None
if not self.mapping_context and not (self.compact_seq_map or self.column == 0):
self.write_line_break()
self.increase_indent(flow=False, sequence=False)
self.state = self.expect_first_block_mapping_key
def expect_first_block_mapping_key(self):
# type: () -> None
return self.expect_block_mapping_key(first=True)
def expect_block_mapping_key(self, first=False):
# type: (Any) -> None
if not first and isinstance(self.event, MappingEndEvent):
if self.event.comment and self.event.comment[1]:
# final comments from a doc
self.write_pre_comment(self.event)
self.indent = self.indents.pop()
self.state = self.states.pop()
else:
if self.event.comment and self.event.comment[1]:
# final comments from a doc
self.write_pre_comment(self.event)
self.write_indent()
if self.check_simple_key():
if not isinstance(
self.event, (SequenceStartEvent, MappingStartEvent)
): # sequence keys
try:
if self.event.style == '?':
self.write_indicator('?', True, indention=True)
except AttributeError: # aliases have no style
pass
self.states.append(self.expect_block_mapping_simple_value)
self.expect_node(mapping=True, simple_key=True)
# test on style for alias in !!set
if isinstance(self.event, AliasEvent) and not self.event.style == '?':
self.stream.write(' ')
else:
self.write_indicator('?', True, indention=True)
self.states.append(self.expect_block_mapping_value)
self.expect_node(mapping=True)
def expect_block_mapping_simple_value(self):
# type: () -> None
if getattr(self.event, 'style', None) != '?':
# prefix = ''
if self.indent == 0 and self.top_level_colon_align is not None:
# write non-prefixed colon
c = ' ' * (self.top_level_colon_align - self.column) + self.colon
else:
c = self.prefixed_colon
self.write_indicator(c, False)
self.states.append(self.expect_block_mapping_key)
self.expect_node(mapping=True)
def expect_block_mapping_value(self):
# type: () -> None
self.write_indent()
self.write_indicator(self.prefixed_colon, True, indention=True)
self.states.append(self.expect_block_mapping_key)
self.expect_node(mapping=True)
# Checkers.
def check_empty_sequence(self):
# type: () -> bool
return (
isinstance(self.event, SequenceStartEvent)
and bool(self.events)
and isinstance(self.events[0], SequenceEndEvent)
)
def check_empty_mapping(self):
# type: () -> bool
return (
isinstance(self.event, MappingStartEvent)
and bool(self.events)
and isinstance(self.events[0], MappingEndEvent)
)
def check_empty_document(self):
# type: () -> bool
if not isinstance(self.event, DocumentStartEvent) or not self.events:
return False
event = self.events[0]
return (
isinstance(event, ScalarEvent)
and event.anchor is None
and event.tag is None
and event.implicit
and event.value == ""
)
def check_simple_key(self):
# type: () -> bool
length = 0
if isinstance(self.event, NodeEvent) and self.event.anchor is not None:
if self.prepared_anchor is None:
self.prepared_anchor = self.prepare_anchor(self.event.anchor)
length += len(self.prepared_anchor)
if (
isinstance(self.event, (ScalarEvent, CollectionStartEvent))
and self.event.tag is not None
):
if self.prepared_tag is None:
self.prepared_tag = self.prepare_tag(self.event.tag)
length += len(self.prepared_tag)
if isinstance(self.event, ScalarEvent):
if self.analysis is None:
self.analysis = self.analyze_scalar(self.event.value)
length += len(self.analysis.scalar)
return length < self.MAX_SIMPLE_KEY_LENGTH and (
isinstance(self.event, AliasEvent)
or (isinstance(self.event, SequenceStartEvent) and self.event.flow_style is True)
or (isinstance(self.event, MappingStartEvent) and self.event.flow_style is True)
or (
isinstance(self.event, ScalarEvent)
# if there is an explicit style for an empty string, it is a simple key
and not (self.analysis.empty and self.style and self.style not in '\'"')
and not self.analysis.multiline
)
or self.check_empty_sequence()
or self.check_empty_mapping()
)
# Anchor, Tag, and Scalar processors.
def process_anchor(self, indicator):
# type: (Any) -> bool
if self.event.anchor is None:
self.prepared_anchor = None
return False
if self.prepared_anchor is None:
self.prepared_anchor = self.prepare_anchor(self.event.anchor)
if self.prepared_anchor:
self.write_indicator(indicator + self.prepared_anchor, True)
# issue 288
self.no_newline = False
self.prepared_anchor = None
return True
def process_tag(self):
# type: () -> None
tag = self.event.tag
if isinstance(self.event, ScalarEvent):
if self.style is None:
self.style = self.choose_scalar_style()
if (
self.event.value == ''
and self.style == "'"
and tag == 'tag:yaml.org,2002:null'
and self.alt_null is not None
):
self.event.value = self.alt_null
self.analysis = None
self.style = self.choose_scalar_style()
if (not self.canonical or tag is None) and (
(self.style == "" and self.event.implicit[0])
or (self.style != "" and self.event.implicit[1])
):
self.prepared_tag = None
return
if self.event.implicit[0] and tag is None:
tag = '!'
self.prepared_tag = None
else:
if (not self.canonical or tag is None) and self.event.implicit:
self.prepared_tag = None
return
if tag is None:
raise EmitterError('tag is not specified')
if self.prepared_tag is None:
self.prepared_tag = self.prepare_tag(tag)
if self.prepared_tag:
self.write_indicator(self.prepared_tag, True)
if (
self.sequence_context
and not self.flow_level
and isinstance(self.event, ScalarEvent)
):
self.no_newline = True
self.prepared_tag = None
def choose_scalar_style(self):
# type: () -> Any
if self.analysis is None:
self.analysis = self.analyze_scalar(self.event.value)
if self.event.style == '"' or self.canonical:
return '"'
if (not self.event.style or self.event.style == '?') and (
self.event.implicit[0] or not self.event.implicit[2]
):
if not (
self.simple_key_context and (self.analysis.empty or self.analysis.multiline)
) and (
self.flow_level
and self.analysis.allow_flow_plain
or (not self.flow_level and self.analysis.allow_block_plain)
):
return ""
self.analysis.allow_block = True
if self.event.style and self.event.style in '|>':
if (
not self.flow_level
and not self.simple_key_context
and self.analysis.allow_block
):
return self.event.style
if not self.event.style and self.analysis.allow_double_quoted:
if "'" in self.event.value or '\n' in self.event.value:
return '"'
if not self.event.style or self.event.style == "'":
if self.analysis.allow_single_quoted and not (
self.simple_key_context and self.analysis.multiline
):
return "'"
return '"'
def process_scalar(self):
# type: () -> None
if self.analysis is None:
self.analysis = self.analyze_scalar(self.event.value)
if self.style is None:
self.style = self.choose_scalar_style()
split = not self.simple_key_context
# if self.analysis.multiline and split \
# and (not self.style or self.style in '\'\"'):
# self.write_indent()
# nprint('xx', self.sequence_context, self.flow_level)
if self.sequence_context and not self.flow_level:
self.write_indent()
if self.style == '"':
self.write_double_quoted(self.analysis.scalar, split)
elif self.style == "'":
self.write_single_quoted(self.analysis.scalar, split)
elif self.style == '>':
self.write_folded(self.analysis.scalar)
if (
self.event.comment
and self.event.comment[0]
and self.event.comment[0].column >= self.indent
):
# comment following a folded scalar must dedent (issue 376)
self.event.comment[0].column = self.indent - 1 # type: ignore
elif self.style == '|':
# self.write_literal(self.analysis.scalar, self.event.comment)
try:
cmx = self.event.comment[1][0]
except (IndexError, TypeError):
cmx = ""
self.write_literal(self.analysis.scalar, cmx)
if (
self.event.comment
and self.event.comment[0]
and self.event.comment[0].column >= self.indent
):
# comment following a literal scalar must dedent (issue 376)
self.event.comment[0].column = self.indent - 1 # type: ignore
else:
self.write_plain(self.analysis.scalar, split)
self.analysis = None
self.style = None
if self.event.comment:
self.write_post_comment(self.event)
# Analyzers.
def prepare_version(self, version):
# type: (Any) -> Any
major, minor = version
if major != 1:
raise EmitterError(
_F('unsupported YAML version: {major:d}.{minor:d}', major=major, minor=minor)
)
return _F('{major:d}.{minor:d}', major=major, minor=minor)
def prepare_tag_handle(self, handle):
# type: (Any) -> Any
if not handle:
raise EmitterError('tag handle must not be empty')
if handle[0] != '!' or handle[-1] != '!':
raise EmitterError(
_F("tag handle must start and end with '!': {handle!r}", handle=handle)
)
for ch in handle[1:-1]:
if not ('0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' or ch in '-_'):
raise EmitterError(
_F(
'invalid character {ch!r} in the tag handle: {handle!r}',
ch=ch,
handle=handle,
)
)
return handle
def prepare_tag_prefix(self, prefix):
# type: (Any) -> Any
if not prefix:
raise EmitterError('tag prefix must not be empty')
chunks = [] # type: List[Any]
start = end = 0
if prefix[0] == '!':
end = 1
ch_set = "-;/?:@&=+$,_.~*'()[]"
if self.dumper:
version = getattr(self.dumper, 'version', (1, 2))
if version is None or version >= (1, 2):
ch_set += '#'
while end < len(prefix):
ch = prefix[end]
if '0' <= ch <= '9' or 'A' <= ch <= 'Z' or 'a' <= ch <= 'z' or ch in ch_set:
end += 1
else:
if start < end:
chunks.append(prefix[start:end])
start = end = end + 1
data = ch
for ch in data:
chunks.append(_F('%{ord_ch:02X}', ord_ch=ord(ch)))
if start < end:
chunks.append(prefix[start:end])
return "".join(chunks)
def prepare_tag(self, tag):
# type: (Any) -> Any
if not tag:
raise EmitterError('tag must not be empty')
if tag == '!':
return tag
handle = None
suffix = tag
prefixes = sorted(self.tag_prefixes.keys())
for prefix in prefixes:
if tag.startswith(prefix) and (prefix == '!' or len(prefix) < len(tag)):
handle = self.tag_prefixes[prefix]
suffix = tag[len(prefix) :]
chunks = [] # type: List[Any]
start = end = 0
ch_set = "-;/?:@&=+$,_.~*'()[]"
if self.dumper:
version = getattr(self.dumper, 'version', (1, 2))
if version is None or version >= (1, 2):
ch_set += '#'
while end < len(suffix):
ch = suffix[end]
if (
'0' <= ch <= '9'
or 'A' <= ch <= 'Z'
or 'a' <= ch <= 'z'
or ch in ch_set
or (ch == '!' and handle != '!')
):
end += 1
else:
if start < end:
chunks.append(suffix[start:end])
start = end = end + 1
data = ch
for ch in data:
chunks.append(_F('%{ord_ch:02X}', ord_ch=ord(ch)))
if start < end:
chunks.append(suffix[start:end])
suffix_text = "".join(chunks)
if handle:
return _F('{handle!s}{suffix_text!s}', handle=handle, suffix_text=suffix_text)
else:
return _F('!<{suffix_text!s}>', suffix_text=suffix_text)
def prepare_anchor(self, anchor):
# type: (Any) -> Any
if not anchor:
raise EmitterError('anchor must not be empty')
for ch in anchor:
if not check_anchorname_char(ch):
raise EmitterError(
_F(
'invalid character {ch!r} in the anchor: {anchor!r}',
ch=ch,
anchor=anchor,
)
)
return anchor
def analyze_scalar(self, scalar):
# type: (Any) -> Any
# Empty scalar is a special case.
if not scalar:
return ScalarAnalysis(
scalar=scalar,
empty=True,
multiline=False,
allow_flow_plain=False,
allow_block_plain=True,
allow_single_quoted=True,
allow_double_quoted=True,
allow_block=False,
)
# Indicators and special characters.
block_indicators = False
flow_indicators = False
line_breaks = False
special_characters = False
# Important whitespace combinations.
leading_space = False
leading_break = False
trailing_space = False
trailing_break = False
break_space = False
space_break = False
# Check document indicators.
if scalar.startswith('---') or scalar.startswith('...'):
block_indicators = True
flow_indicators = True
# First character or preceded by a whitespace.
preceeded_by_whitespace = True
# Last character or followed by a whitespace.
followed_by_whitespace = len(scalar) == 1 or scalar[1] in '\0 \t\r\n\x85\u2028\u2029'
# The previous character is a space.
previous_space = False
# The previous character is a break.
previous_break = False
index = 0
while index < len(scalar):
ch = scalar[index]
# Check for indicators.
if index == 0:
# Leading indicators are special characters.
if ch in '#,[]{}&*!|>\'"%@`':
flow_indicators = True
block_indicators = True
if ch in '?:': # ToDo
if self.serializer.use_version == (1, 1):
flow_indicators = True
elif len(scalar) == 1: # single character
flow_indicators = True
if followed_by_whitespace:
block_indicators = True
if ch == '-' and followed_by_whitespace:
flow_indicators = True
block_indicators = True
else:
# Some indicators cannot appear within a scalar as well.
if ch in ',[]{}': # http://yaml.org/spec/1.2/spec.html#id2788859
flow_indicators = True
if ch == '?' and self.serializer.use_version == (1, 1):
flow_indicators = True
if ch == ':':
if followed_by_whitespace:
flow_indicators = True
block_indicators = True
if ch == '#' and preceeded_by_whitespace:
flow_indicators = True
block_indicators = True
# Check for line breaks, special, and unicode characters.
if ch in '\n\x85\u2028\u2029':
line_breaks = True
if not (ch == '\n' or '\x20' <= ch <= '\x7E'):
if (
ch == '\x85'
or '\xA0' <= ch <= '\uD7FF'
or '\uE000' <= ch <= '\uFFFD'
or (self.unicode_supplementary and ('\U00010000' <= ch <= '\U0010FFFF'))
) and ch != '\uFEFF':
# unicode_characters = True
if not self.allow_unicode:
special_characters = True
else:
special_characters = True
# Detect important whitespace combinations.
if ch == ' ':
if index == 0:
leading_space = True
if index == len(scalar) - 1:
trailing_space = True
if previous_break:
break_space = True
previous_space = True
previous_break = False
elif ch in '\n\x85\u2028\u2029':
if index == 0:
leading_break = True
if index == len(scalar) - 1:
trailing_break = True
if previous_space:
space_break = True
previous_space = False
previous_break = True
else:
previous_space = False
previous_break = False
# Prepare for the next character.
index += 1
preceeded_by_whitespace = ch in '\0 \t\r\n\x85\u2028\u2029'
followed_by_whitespace = (
index + 1 >= len(scalar) or scalar[index + 1] in '\0 \t\r\n\x85\u2028\u2029'
)
# Let's decide what styles are allowed.
allow_flow_plain = True
allow_block_plain = True
allow_single_quoted = True
allow_double_quoted = True
allow_block = True
# Leading and trailing whitespaces are bad for plain scalars.
if leading_space or leading_break or trailing_space or trailing_break:
allow_flow_plain = allow_block_plain = False
# We do not permit trailing spaces for block scalars.
if trailing_space:
allow_block = False
# Spaces at the beginning of a new line are only acceptable for block
# scalars.
if break_space:
allow_flow_plain = allow_block_plain = allow_single_quoted = False
# Spaces followed by breaks, as well as special character are only
# allowed for double quoted scalars.
if special_characters:
allow_flow_plain = allow_block_plain = allow_single_quoted = allow_block = False
elif space_break:
allow_flow_plain = allow_block_plain = allow_single_quoted = False
if not self.allow_space_break:
allow_block = False
# Although the plain scalar writer supports breaks, we never emit
# multiline plain scalars.
if line_breaks:
allow_flow_plain = allow_block_plain = False
# Flow indicators are forbidden for flow plain scalars.
if flow_indicators:
allow_flow_plain = False
# Block indicators are forbidden for block plain scalars.
if block_indicators:
allow_block_plain = False
return ScalarAnalysis(
scalar=scalar,
empty=False,
multiline=line_breaks,
allow_flow_plain=allow_flow_plain,
allow_block_plain=allow_block_plain,
allow_single_quoted=allow_single_quoted,
allow_double_quoted=allow_double_quoted,
allow_block=allow_block,
)
# Writers.
def flush_stream(self):
# type: () -> None
if hasattr(self.stream, 'flush'):
self.stream.flush()
def write_stream_start(self):
# type: () -> None
# Write BOM if needed.
if self.encoding and self.encoding.startswith('utf-16'):
self.stream.write('\uFEFF'.encode(self.encoding))
def write_stream_end(self):
# type: () -> None
self.flush_stream()
def write_indicator(self, indicator, need_whitespace, whitespace=False, indention=False):
# type: (Any, Any, bool, bool) -> None
if self.whitespace or not need_whitespace:
data = indicator
else:
data = ' ' + indicator
self.whitespace = whitespace
self.indention = self.indention and indention
self.column += len(data)
self.open_ended = False
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
def write_indent(self):
# type: () -> None
indent = self.indent or 0
if (
not self.indention
or self.column > indent
or (self.column == indent and not self.whitespace)
):
if bool(self.no_newline):
self.no_newline = False
else:
self.write_line_break()
if self.column < indent:
self.whitespace = True
data = ' ' * (indent - self.column)
self.column = indent
if self.encoding:
data = data.encode(self.encoding) # type: ignore
self.stream.write(data)
def write_line_break(self, data=None):
# type: (Any) -> None
if data is None:
data = self.best_line_break
self.whitespace = True
self.indention = True
self.line += 1
self.column = 0
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
def write_version_directive(self, version_text):
# type: (Any) -> None
data = _F('%YAML {version_text!s}', version_text=version_text)
if self.encoding:
data = data.encode(self.encoding)
self.stream.write(data)
self.write_line_break()
def write_tag_directive(self, handle_text, prefix_text):
# type: (Any, Any) -> None
data = _F(
'%TAG {handle_text!s} {prefix_text!s}',
handle_text=handle_text,
prefix_text=prefix_text,
)
if self.encoding:
data = data.encode(self.encoding)
self.stream.write(data)
self.write_line_break()
# Scalar streams.
def write_single_quoted(self, text, split=True):
# type: (Any, Any) -> None
if self.root_context:
if self.requested_indent is not None:
self.write_line_break()
if self.requested_indent != 0:
self.write_indent()
self.write_indicator("'", True)
spaces = False
breaks = False
start = end = 0
while end <= len(text):
ch = None
if end < len(text):
ch = text[end]
if spaces:
if ch is None or ch != ' ':
if (
start + 1 == end
and self.column > self.best_width
and split
and start != 0
and end != len(text)
):
self.write_indent()
else:
data = text[start:end]
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
start = end
elif breaks:
if ch is None or ch not in '\n\x85\u2028\u2029':
if text[start] == '\n':
self.write_line_break()
for br in text[start:end]:
if br == '\n':
self.write_line_break()
else:
self.write_line_break(br)
self.write_indent()
start = end
else:
if ch is None or ch in ' \n\x85\u2028\u2029' or ch == "'":
if start < end:
data = text[start:end]
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
start = end
if ch == "'":
data = "''"
self.column += 2
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
start = end + 1
if ch is not None:
spaces = ch == ' '
breaks = ch in '\n\x85\u2028\u2029'
end += 1
self.write_indicator("'", False)
ESCAPE_REPLACEMENTS = {
'\0': '0',
'\x07': 'a',
'\x08': 'b',
'\x09': 't',
'\x0A': 'n',
'\x0B': 'v',
'\x0C': 'f',
'\x0D': 'r',
'\x1B': 'e',
'"': '"',
'\\': '\\',
'\x85': 'N',
'\xA0': '_',
'\u2028': 'L',
'\u2029': 'P',
}
def write_double_quoted(self, text, split=True):
# type: (Any, Any) -> None
if self.root_context:
if self.requested_indent is not None:
self.write_line_break()
if self.requested_indent != 0:
self.write_indent()
self.write_indicator('"', True)
start = end = 0
while end <= len(text):
ch = None
if end < len(text):
ch = text[end]
if (
ch is None
or ch in '"\\\x85\u2028\u2029\uFEFF'
or not (
'\x20' <= ch <= '\x7E'
or (
self.allow_unicode
and ('\xA0' <= ch <= '\uD7FF' or '\uE000' <= ch <= '\uFFFD')
)
)
):
if start < end:
data = text[start:end]
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
start = end
if ch is not None:
if ch in self.ESCAPE_REPLACEMENTS:
data = '\\' + self.ESCAPE_REPLACEMENTS[ch]
elif ch <= '\xFF':
data = _F('\\x{ord_ch:02X}', ord_ch=ord(ch))
elif ch <= '\uFFFF':
data = _F('\\u{ord_ch:04X}', ord_ch=ord(ch))
else:
data = _F('\\U{ord_ch:08X}', ord_ch=ord(ch))
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
start = end + 1
if (
0 < end < len(text) - 1
and (ch == ' ' or start >= end)
and self.column + (end - start) > self.best_width
and split
):
data = text[start:end] + '\\'
if start < end:
start = end
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
self.write_indent()
self.whitespace = False
self.indention = False
if text[start] == ' ':
data = '\\'
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
end += 1
self.write_indicator('"', False)
def determine_block_hints(self, text):
# type: (Any) -> Any
indent = 0
indicator = ''
hints = ''
if text:
if text[0] in ' \n\x85\u2028\u2029':
indent = self.best_sequence_indent
hints += str(indent)
elif self.root_context:
for end in ['\n---', '\n...']:
pos = 0
while True:
pos = text.find(end, pos)
if pos == -1:
break
try:
if text[pos + 4] in ' \r\n':
break
except IndexError:
pass
pos += 1
if pos > -1:
break
if pos > 0:
indent = self.best_sequence_indent
if text[-1] not in '\n\x85\u2028\u2029':
indicator = '-'
elif len(text) == 1 or text[-2] in '\n\x85\u2028\u2029':
indicator = '+'
hints += indicator
return hints, indent, indicator
def write_folded(self, text):
# type: (Any) -> None
hints, _indent, _indicator = self.determine_block_hints(text)
self.write_indicator('>' + hints, True)
if _indicator == '+':
self.open_ended = True
self.write_line_break()
leading_space = True
spaces = False
breaks = True
start = end = 0
while end <= len(text):
ch = None
if end < len(text):
ch = text[end]
if breaks:
if ch is None or ch not in '\n\x85\u2028\u2029\a':
if (
not leading_space
and ch is not None
and ch != ' '
and text[start] == '\n'
):
self.write_line_break()
leading_space = ch == ' '
for br in text[start:end]:
if br == '\n':
self.write_line_break()
else:
self.write_line_break(br)
if ch is not None:
self.write_indent()
start = end
elif spaces:
if ch != ' ':
if start + 1 == end and self.column > self.best_width:
self.write_indent()
else:
data = text[start:end]
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
start = end
else:
if ch is None or ch in ' \n\x85\u2028\u2029\a':
data = text[start:end]
self.column += len(data)
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
if ch == '\a':
if end < (len(text) - 1) and not text[end + 2].isspace():
self.write_line_break()
self.write_indent()
end += 2 # \a and the space that is inserted on the fold
else:
raise EmitterError('unexcpected fold indicator \\a before space')
if ch is None:
self.write_line_break()
start = end
if ch is not None:
breaks = ch in '\n\x85\u2028\u2029'
spaces = ch == ' '
end += 1
def write_literal(self, text, comment=None):
# type: (Any, Any) -> None
hints, _indent, _indicator = self.determine_block_hints(text)
# if comment is not None:
# try:
# hints += comment[1][0]
# except (TypeError, IndexError) as e:
# pass
if not isinstance(comment, str):
comment = ''
self.write_indicator('|' + hints + comment, True)
# try:
# nprintf('selfev', comment)
# cmx = comment[1][0]
# if cmx:
# self.stream.write(cmx)
# except (TypeError, IndexError) as e:
# pass
if _indicator == '+':
self.open_ended = True
self.write_line_break()
breaks = True
start = end = 0
while end <= len(text):
ch = None
if end < len(text):
ch = text[end]
if breaks:
if ch is None or ch not in '\n\x85\u2028\u2029':
for br in text[start:end]:
if br == '\n':
self.write_line_break()
else:
self.write_line_break(br)
if ch is not None:
if self.root_context:
idnx = self.indent if self.indent is not None else 0
self.stream.write(' ' * (_indent + idnx))
else:
self.write_indent()
start = end
else:
if ch is None or ch in '\n\x85\u2028\u2029':
data = text[start:end]
if bool(self.encoding):
data = data.encode(self.encoding)
self.stream.write(data)
if ch is None:
self.write_line_break()
start = end
if ch is not None:
breaks = ch in '\n\x85\u2028\u2029'
end += 1
def write_plain(self, text, split=True):
# type: (Any, Any) -> None
if self.root_context:
if self.requested_indent is not None:
self.write_line_break()
if self.requested_indent != 0:
self.write_indent()
else:
self.open_ended = True
if not text:
return
if not self.whitespace:
data = ' '
self.column += len(data)
if self.encoding:
data = data.encode(self.encoding) # type: ignore
self.stream.write(data)
self.whitespace = False
self.indention = False
spaces = False
breaks = False
start = end = 0
while end <= len(text):
ch = None
if end < len(text):
ch = text[end]
if spaces:
if ch != ' ':
if start + 1 == end and self.column > self.best_width and split:
self.write_indent()
self.whitespace = False
self.indention = False
else:
data = text[start:end]
self.column += len(data)
if self.encoding:
data = data.encode(self.encoding) # type: ignore
self.stream.write(data)
start = end
elif breaks:
if ch not in '\n\x85\u2028\u2029': # type: ignore
if text[start] == '\n':
self.write_line_break()
for br in text[start:end]:
if br == '\n':
self.write_line_break()
else:
self.write_line_break(br)
self.write_indent()
self.whitespace = False
self.indention = False
start = end
else:
if ch is None or ch in ' \n\x85\u2028\u2029':
data = text[start:end]
self.column += len(data)
if self.encoding:
data = data.encode(self.encoding) # type: ignore
try:
self.stream.write(data)
except: # NOQA
sys.stdout.write(repr(data) + '\n')
raise
start = end
if ch is not None:
spaces = ch == ' '
breaks = ch in '\n\x85\u2028\u2029'
end += 1
def write_comment(self, comment, pre=False):
# type: (Any, bool) -> None
value = comment.value
# nprintf('{:02d} {:02d} {!r}'.format(self.column, comment.start_mark.column, value))
if not pre and value[-1] == '\n':
value = value[:-1]
try:
# get original column position
col = comment.start_mark.column
if comment.value and comment.value.startswith('\n'):
# never inject extra spaces if the comment starts with a newline
# and not a real comment (e.g. if you have an empty line following a key-value
col = self.column
elif col < self.column + 1:
ValueError
except ValueError:
col = self.column + 1
# nprint('post_comment', self.line, self.column, value)
try:
# at least one space if the current column >= the start column of the comment
# but not at the start of a line
nr_spaces = col - self.column
if self.column and value.strip() and nr_spaces < 1 and value[0] != '\n':
nr_spaces = 1
value = ' ' * nr_spaces + value
try:
if bool(self.encoding):
value = value.encode(self.encoding)
except UnicodeDecodeError:
pass
self.stream.write(value)
except TypeError:
raise
if not pre:
self.write_line_break()
def write_pre_comment(self, event):
# type: (Any) -> bool
comments = event.comment[1]
if comments is None:
return False
try:
start_events = (MappingStartEvent, SequenceStartEvent)
for comment in comments:
if isinstance(event, start_events) and getattr(comment, 'pre_done', None):
continue
if self.column != 0:
self.write_line_break()
self.write_comment(comment, pre=True)
if isinstance(event, start_events):
comment.pre_done = True
except TypeError:
sys.stdout.write('eventtt {} {}'.format(type(event), event))
raise
return True
def write_post_comment(self, event):
# type: (Any) -> bool
if self.event.comment[0] is None:
return False
comment = event.comment[0]
self.write_comment(comment)
return True
|