OLD | NEW |
(Empty) | |
| 1 # -*- coding: utf-8 -*- |
| 2 """ |
| 3 jinja2.ext |
| 4 ~~~~~~~~~~ |
| 5 |
| 6 Jinja extensions allow to add custom tags similar to the way django custom |
| 7 tags work. By default two example extensions exist: an i18n and a cache |
| 8 extension. |
| 9 |
| 10 :copyright: (c) 2010 by the Jinja Team. |
| 11 :license: BSD. |
| 12 """ |
| 13 from collections import deque |
| 14 from jinja2 import nodes |
| 15 from jinja2.defaults import * |
| 16 from jinja2.environment import Environment |
| 17 from jinja2.runtime import Undefined, concat |
| 18 from jinja2.exceptions import TemplateAssertionError, TemplateSyntaxError |
| 19 from jinja2.utils import contextfunction, import_string, Markup, next |
| 20 |
| 21 |
| 22 # the only real useful gettext functions for a Jinja template. Note |
| 23 # that ugettext must be assigned to gettext as Jinja doesn't support |
| 24 # non unicode strings. |
| 25 GETTEXT_FUNCTIONS = ('_', 'gettext', 'ngettext') |
| 26 |
| 27 |
| 28 class ExtensionRegistry(type): |
| 29 """Gives the extension an unique identifier.""" |
| 30 |
| 31 def __new__(cls, name, bases, d): |
| 32 rv = type.__new__(cls, name, bases, d) |
| 33 rv.identifier = rv.__module__ + '.' + rv.__name__ |
| 34 return rv |
| 35 |
| 36 |
| 37 class Extension(object): |
| 38 """Extensions can be used to add extra functionality to the Jinja template |
| 39 system at the parser level. Custom extensions are bound to an environment |
| 40 but may not store environment specific data on `self`. The reason for |
| 41 this is that an extension can be bound to another environment (for |
| 42 overlays) by creating a copy and reassigning the `environment` attribute. |
| 43 |
| 44 As extensions are created by the environment they cannot accept any |
| 45 arguments for configuration. One may want to work around that by using |
| 46 a factory function, but that is not possible as extensions are identified |
| 47 by their import name. The correct way to configure the extension is |
| 48 storing the configuration values on the environment. Because this way the |
| 49 environment ends up acting as central configuration storage the |
| 50 attributes may clash which is why extensions have to ensure that the names |
| 51 they choose for configuration are not too generic. ``prefix`` for example |
| 52 is a terrible name, ``fragment_cache_prefix`` on the other hand is a good |
| 53 name as includes the name of the extension (fragment cache). |
| 54 """ |
| 55 __metaclass__ = ExtensionRegistry |
| 56 |
| 57 #: if this extension parses this is the list of tags it's listening to. |
| 58 tags = set() |
| 59 |
| 60 #: the priority of that extension. This is especially useful for |
| 61 #: extensions that preprocess values. A lower value means higher |
| 62 #: priority. |
| 63 #: |
| 64 #: .. versionadded:: 2.4 |
| 65 priority = 100 |
| 66 |
| 67 def __init__(self, environment): |
| 68 self.environment = environment |
| 69 |
| 70 def bind(self, environment): |
| 71 """Create a copy of this extension bound to another environment.""" |
| 72 rv = object.__new__(self.__class__) |
| 73 rv.__dict__.update(self.__dict__) |
| 74 rv.environment = environment |
| 75 return rv |
| 76 |
| 77 def preprocess(self, source, name, filename=None): |
| 78 """This method is called before the actual lexing and can be used to |
| 79 preprocess the source. The `filename` is optional. The return value |
| 80 must be the preprocessed source. |
| 81 """ |
| 82 return source |
| 83 |
| 84 def filter_stream(self, stream): |
| 85 """It's passed a :class:`~jinja2.lexer.TokenStream` that can be used |
| 86 to filter tokens returned. This method has to return an iterable of |
| 87 :class:`~jinja2.lexer.Token`\s, but it doesn't have to return a |
| 88 :class:`~jinja2.lexer.TokenStream`. |
| 89 |
| 90 In the `ext` folder of the Jinja2 source distribution there is a file |
| 91 called `inlinegettext.py` which implements a filter that utilizes this |
| 92 method. |
| 93 """ |
| 94 return stream |
| 95 |
| 96 def parse(self, parser): |
| 97 """If any of the :attr:`tags` matched this method is called with the |
| 98 parser as first argument. The token the parser stream is pointing at |
| 99 is the name token that matched. This method has to return one or a |
| 100 list of multiple nodes. |
| 101 """ |
| 102 raise NotImplementedError() |
| 103 |
| 104 def attr(self, name, lineno=None): |
| 105 """Return an attribute node for the current extension. This is useful |
| 106 to pass constants on extensions to generated template code. |
| 107 |
| 108 :: |
| 109 |
| 110 self.attr('_my_attribute', lineno=lineno) |
| 111 """ |
| 112 return nodes.ExtensionAttribute(self.identifier, name, lineno=lineno) |
| 113 |
| 114 def call_method(self, name, args=None, kwargs=None, dyn_args=None, |
| 115 dyn_kwargs=None, lineno=None): |
| 116 """Call a method of the extension. This is a shortcut for |
| 117 :meth:`attr` + :class:`jinja2.nodes.Call`. |
| 118 """ |
| 119 if args is None: |
| 120 args = [] |
| 121 if kwargs is None: |
| 122 kwargs = [] |
| 123 return nodes.Call(self.attr(name, lineno=lineno), args, kwargs, |
| 124 dyn_args, dyn_kwargs, lineno=lineno) |
| 125 |
| 126 |
| 127 @contextfunction |
| 128 def _gettext_alias(__context, *args, **kwargs): |
| 129 return __context.call(__context.resolve('gettext'), *args, **kwargs) |
| 130 |
| 131 |
| 132 def _make_new_gettext(func): |
| 133 @contextfunction |
| 134 def gettext(__context, __string, **variables): |
| 135 rv = __context.call(func, __string) |
| 136 if __context.eval_ctx.autoescape: |
| 137 rv = Markup(rv) |
| 138 return rv % variables |
| 139 return gettext |
| 140 |
| 141 |
| 142 def _make_new_ngettext(func): |
| 143 @contextfunction |
| 144 def ngettext(__context, __singular, __plural, __num, **variables): |
| 145 variables.setdefault('num', __num) |
| 146 rv = __context.call(func, __singular, __plural, __num) |
| 147 if __context.eval_ctx.autoescape: |
| 148 rv = Markup(rv) |
| 149 return rv % variables |
| 150 return ngettext |
| 151 |
| 152 |
| 153 class InternationalizationExtension(Extension): |
| 154 """This extension adds gettext support to Jinja2.""" |
| 155 tags = set(['trans']) |
| 156 |
| 157 # TODO: the i18n extension is currently reevaluating values in a few |
| 158 # situations. Take this example: |
| 159 # {% trans count=something() %}{{ count }} foo{% pluralize |
| 160 # %}{{ count }} fooss{% endtrans %} |
| 161 # something is called twice here. One time for the gettext value and |
| 162 # the other time for the n-parameter of the ngettext function. |
| 163 |
| 164 def __init__(self, environment): |
| 165 Extension.__init__(self, environment) |
| 166 environment.globals['_'] = _gettext_alias |
| 167 environment.extend( |
| 168 install_gettext_translations=self._install, |
| 169 install_null_translations=self._install_null, |
| 170 install_gettext_callables=self._install_callables, |
| 171 uninstall_gettext_translations=self._uninstall, |
| 172 extract_translations=self._extract, |
| 173 newstyle_gettext=False |
| 174 ) |
| 175 |
| 176 def _install(self, translations, newstyle=None): |
| 177 gettext = getattr(translations, 'ugettext', None) |
| 178 if gettext is None: |
| 179 gettext = translations.gettext |
| 180 ngettext = getattr(translations, 'ungettext', None) |
| 181 if ngettext is None: |
| 182 ngettext = translations.ngettext |
| 183 self._install_callables(gettext, ngettext, newstyle) |
| 184 |
| 185 def _install_null(self, newstyle=None): |
| 186 self._install_callables( |
| 187 lambda x: x, |
| 188 lambda s, p, n: (n != 1 and (p,) or (s,))[0], |
| 189 newstyle |
| 190 ) |
| 191 |
| 192 def _install_callables(self, gettext, ngettext, newstyle=None): |
| 193 if newstyle is not None: |
| 194 self.environment.newstyle_gettext = newstyle |
| 195 if self.environment.newstyle_gettext: |
| 196 gettext = _make_new_gettext(gettext) |
| 197 ngettext = _make_new_ngettext(ngettext) |
| 198 self.environment.globals.update( |
| 199 gettext=gettext, |
| 200 ngettext=ngettext |
| 201 ) |
| 202 |
| 203 def _uninstall(self, translations): |
| 204 for key in 'gettext', 'ngettext': |
| 205 self.environment.globals.pop(key, None) |
| 206 |
| 207 def _extract(self, source, gettext_functions=GETTEXT_FUNCTIONS): |
| 208 if isinstance(source, basestring): |
| 209 source = self.environment.parse(source) |
| 210 return extract_from_ast(source, gettext_functions) |
| 211 |
| 212 def parse(self, parser): |
| 213 """Parse a translatable tag.""" |
| 214 lineno = next(parser.stream).lineno |
| 215 num_called_num = False |
| 216 |
| 217 # find all the variables referenced. Additionally a variable can be |
| 218 # defined in the body of the trans block too, but this is checked at |
| 219 # a later state. |
| 220 plural_expr = None |
| 221 variables = {} |
| 222 while parser.stream.current.type != 'block_end': |
| 223 if variables: |
| 224 parser.stream.expect('comma') |
| 225 |
| 226 # skip colon for python compatibility |
| 227 if parser.stream.skip_if('colon'): |
| 228 break |
| 229 |
| 230 name = parser.stream.expect('name') |
| 231 if name.value in variables: |
| 232 parser.fail('translatable variable %r defined twice.' % |
| 233 name.value, name.lineno, |
| 234 exc=TemplateAssertionError) |
| 235 |
| 236 # expressions |
| 237 if parser.stream.current.type == 'assign': |
| 238 next(parser.stream) |
| 239 variables[name.value] = var = parser.parse_expression() |
| 240 else: |
| 241 variables[name.value] = var = nodes.Name(name.value, 'load') |
| 242 |
| 243 if plural_expr is None: |
| 244 plural_expr = var |
| 245 num_called_num = name.value == 'num' |
| 246 |
| 247 parser.stream.expect('block_end') |
| 248 |
| 249 plural = plural_names = None |
| 250 have_plural = False |
| 251 referenced = set() |
| 252 |
| 253 # now parse until endtrans or pluralize |
| 254 singular_names, singular = self._parse_block(parser, True) |
| 255 if singular_names: |
| 256 referenced.update(singular_names) |
| 257 if plural_expr is None: |
| 258 plural_expr = nodes.Name(singular_names[0], 'load') |
| 259 num_called_num = singular_names[0] == 'num' |
| 260 |
| 261 # if we have a pluralize block, we parse that too |
| 262 if parser.stream.current.test('name:pluralize'): |
| 263 have_plural = True |
| 264 next(parser.stream) |
| 265 if parser.stream.current.type != 'block_end': |
| 266 name = parser.stream.expect('name') |
| 267 if name.value not in variables: |
| 268 parser.fail('unknown variable %r for pluralization' % |
| 269 name.value, name.lineno, |
| 270 exc=TemplateAssertionError) |
| 271 plural_expr = variables[name.value] |
| 272 num_called_num = name.value == 'num' |
| 273 parser.stream.expect('block_end') |
| 274 plural_names, plural = self._parse_block(parser, False) |
| 275 next(parser.stream) |
| 276 referenced.update(plural_names) |
| 277 else: |
| 278 next(parser.stream) |
| 279 |
| 280 # register free names as simple name expressions |
| 281 for var in referenced: |
| 282 if var not in variables: |
| 283 variables[var] = nodes.Name(var, 'load') |
| 284 |
| 285 if not have_plural: |
| 286 plural_expr = None |
| 287 elif plural_expr is None: |
| 288 parser.fail('pluralize without variables', lineno) |
| 289 |
| 290 node = self._make_node(singular, plural, variables, plural_expr, |
| 291 bool(referenced), |
| 292 num_called_num and have_plural) |
| 293 node.set_lineno(lineno) |
| 294 return node |
| 295 |
| 296 def _parse_block(self, parser, allow_pluralize): |
| 297 """Parse until the next block tag with a given name.""" |
| 298 referenced = [] |
| 299 buf = [] |
| 300 while 1: |
| 301 if parser.stream.current.type == 'data': |
| 302 buf.append(parser.stream.current.value.replace('%', '%%')) |
| 303 next(parser.stream) |
| 304 elif parser.stream.current.type == 'variable_begin': |
| 305 next(parser.stream) |
| 306 name = parser.stream.expect('name').value |
| 307 referenced.append(name) |
| 308 buf.append('%%(%s)s' % name) |
| 309 parser.stream.expect('variable_end') |
| 310 elif parser.stream.current.type == 'block_begin': |
| 311 next(parser.stream) |
| 312 if parser.stream.current.test('name:endtrans'): |
| 313 break |
| 314 elif parser.stream.current.test('name:pluralize'): |
| 315 if allow_pluralize: |
| 316 break |
| 317 parser.fail('a translatable section can have only one ' |
| 318 'pluralize section') |
| 319 parser.fail('control structures in translatable sections are ' |
| 320 'not allowed') |
| 321 elif parser.stream.eos: |
| 322 parser.fail('unclosed translation block') |
| 323 else: |
| 324 assert False, 'internal parser error' |
| 325 |
| 326 return referenced, concat(buf) |
| 327 |
| 328 def _make_node(self, singular, plural, variables, plural_expr, |
| 329 vars_referenced, num_called_num): |
| 330 """Generates a useful node from the data provided.""" |
| 331 # no variables referenced? no need to escape for old style |
| 332 # gettext invocations only if there are vars. |
| 333 if not vars_referenced and not self.environment.newstyle_gettext: |
| 334 singular = singular.replace('%%', '%') |
| 335 if plural: |
| 336 plural = plural.replace('%%', '%') |
| 337 |
| 338 # singular only: |
| 339 if plural_expr is None: |
| 340 gettext = nodes.Name('gettext', 'load') |
| 341 node = nodes.Call(gettext, [nodes.Const(singular)], |
| 342 [], None, None) |
| 343 |
| 344 # singular and plural |
| 345 else: |
| 346 ngettext = nodes.Name('ngettext', 'load') |
| 347 node = nodes.Call(ngettext, [ |
| 348 nodes.Const(singular), |
| 349 nodes.Const(plural), |
| 350 plural_expr |
| 351 ], [], None, None) |
| 352 |
| 353 # in case newstyle gettext is used, the method is powerful |
| 354 # enough to handle the variable expansion and autoescape |
| 355 # handling itself |
| 356 if self.environment.newstyle_gettext: |
| 357 for key, value in variables.iteritems(): |
| 358 # the function adds that later anyways in case num was |
| 359 # called num, so just skip it. |
| 360 if num_called_num and key == 'num': |
| 361 continue |
| 362 node.kwargs.append(nodes.Keyword(key, value)) |
| 363 |
| 364 # otherwise do that here |
| 365 else: |
| 366 # mark the return value as safe if we are in an |
| 367 # environment with autoescaping turned on |
| 368 node = nodes.MarkSafeIfAutoescape(node) |
| 369 if variables: |
| 370 node = nodes.Mod(node, nodes.Dict([ |
| 371 nodes.Pair(nodes.Const(key), value) |
| 372 for key, value in variables.items() |
| 373 ])) |
| 374 return nodes.Output([node]) |
| 375 |
| 376 |
| 377 class ExprStmtExtension(Extension): |
| 378 """Adds a `do` tag to Jinja2 that works like the print statement just |
| 379 that it doesn't print the return value. |
| 380 """ |
| 381 tags = set(['do']) |
| 382 |
| 383 def parse(self, parser): |
| 384 node = nodes.ExprStmt(lineno=next(parser.stream).lineno) |
| 385 node.node = parser.parse_tuple() |
| 386 return node |
| 387 |
| 388 |
| 389 class LoopControlExtension(Extension): |
| 390 """Adds break and continue to the template engine.""" |
| 391 tags = set(['break', 'continue']) |
| 392 |
| 393 def parse(self, parser): |
| 394 token = next(parser.stream) |
| 395 if token.value == 'break': |
| 396 return nodes.Break(lineno=token.lineno) |
| 397 return nodes.Continue(lineno=token.lineno) |
| 398 |
| 399 |
| 400 class WithExtension(Extension): |
| 401 """Adds support for a django-like with block.""" |
| 402 tags = set(['with']) |
| 403 |
| 404 def parse(self, parser): |
| 405 node = nodes.Scope(lineno=next(parser.stream).lineno) |
| 406 assignments = [] |
| 407 while parser.stream.current.type != 'block_end': |
| 408 lineno = parser.stream.current.lineno |
| 409 if assignments: |
| 410 parser.stream.expect('comma') |
| 411 target = parser.parse_assign_target() |
| 412 parser.stream.expect('assign') |
| 413 expr = parser.parse_expression() |
| 414 assignments.append(nodes.Assign(target, expr, lineno=lineno)) |
| 415 node.body = assignments + \ |
| 416 list(parser.parse_statements(('name:endwith',), |
| 417 drop_needle=True)) |
| 418 return node |
| 419 |
| 420 |
| 421 class AutoEscapeExtension(Extension): |
| 422 """Changes auto escape rules for a scope.""" |
| 423 tags = set(['autoescape']) |
| 424 |
| 425 def parse(self, parser): |
| 426 node = nodes.ScopedEvalContextModifier(lineno=next(parser.stream).lineno
) |
| 427 node.options = [ |
| 428 nodes.Keyword('autoescape', parser.parse_expression()) |
| 429 ] |
| 430 node.body = parser.parse_statements(('name:endautoescape',), |
| 431 drop_needle=True) |
| 432 return nodes.Scope([node]) |
| 433 |
| 434 |
| 435 def extract_from_ast(node, gettext_functions=GETTEXT_FUNCTIONS, |
| 436 babel_style=True): |
| 437 """Extract localizable strings from the given template node. Per |
| 438 default this function returns matches in babel style that means non string |
| 439 parameters as well as keyword arguments are returned as `None`. This |
| 440 allows Babel to figure out what you really meant if you are using |
| 441 gettext functions that allow keyword arguments for placeholder expansion. |
| 442 If you don't want that behavior set the `babel_style` parameter to `False` |
| 443 which causes only strings to be returned and parameters are always stored |
| 444 in tuples. As a consequence invalid gettext calls (calls without a single |
| 445 string parameter or string parameters after non-string parameters) are |
| 446 skipped. |
| 447 |
| 448 This example explains the behavior: |
| 449 |
| 450 >>> from jinja2 import Environment |
| 451 >>> env = Environment() |
| 452 >>> node = env.parse('{{ (_("foo"), _(), ngettext("foo", "bar", 42)) }}') |
| 453 >>> list(extract_from_ast(node)) |
| 454 [(1, '_', 'foo'), (1, '_', ()), (1, 'ngettext', ('foo', 'bar', None))] |
| 455 >>> list(extract_from_ast(node, babel_style=False)) |
| 456 [(1, '_', ('foo',)), (1, 'ngettext', ('foo', 'bar'))] |
| 457 |
| 458 For every string found this function yields a ``(lineno, function, |
| 459 message)`` tuple, where: |
| 460 |
| 461 * ``lineno`` is the number of the line on which the string was found, |
| 462 * ``function`` is the name of the ``gettext`` function used (if the |
| 463 string was extracted from embedded Python code), and |
| 464 * ``message`` is the string itself (a ``unicode`` object, or a tuple |
| 465 of ``unicode`` objects for functions with multiple string arguments). |
| 466 |
| 467 This extraction function operates on the AST and is because of that unable |
| 468 to extract any comments. For comment support you have to use the babel |
| 469 extraction interface or extract comments yourself. |
| 470 """ |
| 471 for node in node.find_all(nodes.Call): |
| 472 if not isinstance(node.node, nodes.Name) or \ |
| 473 node.node.name not in gettext_functions: |
| 474 continue |
| 475 |
| 476 strings = [] |
| 477 for arg in node.args: |
| 478 if isinstance(arg, nodes.Const) and \ |
| 479 isinstance(arg.value, basestring): |
| 480 strings.append(arg.value) |
| 481 else: |
| 482 strings.append(None) |
| 483 |
| 484 for arg in node.kwargs: |
| 485 strings.append(None) |
| 486 if node.dyn_args is not None: |
| 487 strings.append(None) |
| 488 if node.dyn_kwargs is not None: |
| 489 strings.append(None) |
| 490 |
| 491 if not babel_style: |
| 492 strings = tuple(x for x in strings if x is not None) |
| 493 if not strings: |
| 494 continue |
| 495 else: |
| 496 if len(strings) == 1: |
| 497 strings = strings[0] |
| 498 else: |
| 499 strings = tuple(strings) |
| 500 yield node.lineno, node.node.name, strings |
| 501 |
| 502 |
| 503 class _CommentFinder(object): |
| 504 """Helper class to find comments in a token stream. Can only |
| 505 find comments for gettext calls forwards. Once the comment |
| 506 from line 4 is found, a comment for line 1 will not return a |
| 507 usable value. |
| 508 """ |
| 509 |
| 510 def __init__(self, tokens, comment_tags): |
| 511 self.tokens = tokens |
| 512 self.comment_tags = comment_tags |
| 513 self.offset = 0 |
| 514 self.last_lineno = 0 |
| 515 |
| 516 def find_backwards(self, offset): |
| 517 try: |
| 518 for _, token_type, token_value in \ |
| 519 reversed(self.tokens[self.offset:offset]): |
| 520 if token_type in ('comment', 'linecomment'): |
| 521 try: |
| 522 prefix, comment = token_value.split(None, 1) |
| 523 except ValueError: |
| 524 continue |
| 525 if prefix in self.comment_tags: |
| 526 return [comment.rstrip()] |
| 527 return [] |
| 528 finally: |
| 529 self.offset = offset |
| 530 |
| 531 def find_comments(self, lineno): |
| 532 if not self.comment_tags or self.last_lineno > lineno: |
| 533 return [] |
| 534 for idx, (token_lineno, _, _) in enumerate(self.tokens[self.offset:]): |
| 535 if token_lineno > lineno: |
| 536 return self.find_backwards(self.offset + idx) |
| 537 return self.find_backwards(len(self.tokens)) |
| 538 |
| 539 |
| 540 def babel_extract(fileobj, keywords, comment_tags, options): |
| 541 """Babel extraction method for Jinja templates. |
| 542 |
| 543 .. versionchanged:: 2.3 |
| 544 Basic support for translation comments was added. If `comment_tags` |
| 545 is now set to a list of keywords for extraction, the extractor will |
| 546 try to find the best preceeding comment that begins with one of the |
| 547 keywords. For best results, make sure to not have more than one |
| 548 gettext call in one line of code and the matching comment in the |
| 549 same line or the line before. |
| 550 |
| 551 .. versionchanged:: 2.5.1 |
| 552 The `newstyle_gettext` flag can be set to `True` to enable newstyle |
| 553 gettext calls. |
| 554 |
| 555 :param fileobj: the file-like object the messages should be extracted from |
| 556 :param keywords: a list of keywords (i.e. function names) that should be |
| 557 recognized as translation functions |
| 558 :param comment_tags: a list of translator tags to search for and include |
| 559 in the results. |
| 560 :param options: a dictionary of additional options (optional) |
| 561 :return: an iterator over ``(lineno, funcname, message, comments)`` tuples. |
| 562 (comments will be empty currently) |
| 563 """ |
| 564 extensions = set() |
| 565 for extension in options.get('extensions', '').split(','): |
| 566 extension = extension.strip() |
| 567 if not extension: |
| 568 continue |
| 569 extensions.add(import_string(extension)) |
| 570 if InternationalizationExtension not in extensions: |
| 571 extensions.add(InternationalizationExtension) |
| 572 |
| 573 def getbool(options, key, default=False): |
| 574 options.get(key, str(default)).lower() in ('1', 'on', 'yes', 'true') |
| 575 |
| 576 environment = Environment( |
| 577 options.get('block_start_string', BLOCK_START_STRING), |
| 578 options.get('block_end_string', BLOCK_END_STRING), |
| 579 options.get('variable_start_string', VARIABLE_START_STRING), |
| 580 options.get('variable_end_string', VARIABLE_END_STRING), |
| 581 options.get('comment_start_string', COMMENT_START_STRING), |
| 582 options.get('comment_end_string', COMMENT_END_STRING), |
| 583 options.get('line_statement_prefix') or LINE_STATEMENT_PREFIX, |
| 584 options.get('line_comment_prefix') or LINE_COMMENT_PREFIX, |
| 585 getbool(options, 'trim_blocks', TRIM_BLOCKS), |
| 586 NEWLINE_SEQUENCE, frozenset(extensions), |
| 587 cache_size=0, |
| 588 auto_reload=False |
| 589 ) |
| 590 |
| 591 if getbool(options, 'newstyle_gettext'): |
| 592 environment.newstyle_gettext = True |
| 593 |
| 594 source = fileobj.read().decode(options.get('encoding', 'utf-8')) |
| 595 try: |
| 596 node = environment.parse(source) |
| 597 tokens = list(environment.lex(environment.preprocess(source))) |
| 598 except TemplateSyntaxError, e: |
| 599 # skip templates with syntax errors |
| 600 return |
| 601 |
| 602 finder = _CommentFinder(tokens, comment_tags) |
| 603 for lineno, func, message in extract_from_ast(node, keywords): |
| 604 yield lineno, func, message, finder.find_comments(lineno) |
| 605 |
| 606 |
| 607 #: nicer import names |
| 608 i18n = InternationalizationExtension |
| 609 do = ExprStmtExtension |
| 610 loopcontrols = LoopControlExtension |
| 611 with_ = WithExtension |
| 612 autoescape = AutoEscapeExtension |
OLD | NEW |