mirror of https://github.com/django/django.git
Fixed #7704, #14045 and #15495 -- Introduce a lexer for Javascript to fix multiple problems of the translation of Javascript files with xgettext. Many thanks to Ned Batchelder for his contribution of the JsLex library.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@16333 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
parent
d14eb13992
commit
64e19ffb4e
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@ -9,8 +9,8 @@ from subprocess import PIPE, Popen
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from django.core.management.base import CommandError, NoArgsCommand
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from django.utils.text import get_text_list
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from django.utils.jslex import prepare_js_for_gettext
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pythonize_re = re.compile(r'(?:^|\n)\s*//')
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plural_forms_re = re.compile(r'^(?P<value>"Plural-Forms.+?\\n")\s*$', re.MULTILINE | re.DOTALL)
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def handle_extensions(extensions=('html',)):
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@ -184,15 +184,15 @@ def make_messages(locale=None, domain='django', verbosity='1', all=False,
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if verbosity > 1:
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sys.stdout.write('processing file %s in %s\n' % (file, dirpath))
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src = open(os.path.join(dirpath, file), "rU").read()
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src = pythonize_re.sub('\n#', src)
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thefile = '%s.py' % file
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src = prepare_js_for_gettext(src)
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thefile = '%s.c' % file
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f = open(os.path.join(dirpath, thefile), "w")
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try:
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f.write(src)
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finally:
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f.close()
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cmd = (
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'xgettext -d %s -L Perl %s --keyword=gettext_noop '
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'xgettext -d %s -L C %s --keyword=gettext_noop '
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'--keyword=gettext_lazy --keyword=ngettext_lazy:1,2 '
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'--keyword=pgettext:1c,2 --keyword=npgettext:1c,2,3 '
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'--from-code UTF-8 --add-comments=Translators -o - "%s"' % (
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@ -0,0 +1,213 @@
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"""JsLex: a lexer for Javascript"""
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# Originally from https://bitbucket.org/ned/jslex
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import re
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class Tok(object):
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"""
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A specification for a token class.
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"""
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num = 0
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def __init__(self, name, regex, next=None):
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self.id = Tok.num
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Tok.num += 1
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self.name = name
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self.regex = regex
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self.next = next
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def literals(choices, prefix="", suffix=""):
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"""
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Create a regex from a space-separated list of literal `choices`.
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If provided, `prefix` and `suffix` will be attached to each choice
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individually.
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"""
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return "|".join(prefix+re.escape(c)+suffix for c in choices.split())
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class Lexer(object):
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"""
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A generic multi-state regex-based lexer.
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"""
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def __init__(self, states, first):
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self.regexes = {}
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self.toks = {}
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for state, rules in states.items():
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parts = []
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for tok in rules:
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groupid = "t%d" % tok.id
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self.toks[groupid] = tok
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parts.append("(?P<%s>%s)" % (groupid, tok.regex))
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self.regexes[state] = re.compile("|".join(parts), re.MULTILINE|re.VERBOSE)
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self.state = first
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def lex(self, text):
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"""
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Lexically analyze `text`.
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Yields pairs (`name`, `tokentext`).
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"""
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while text:
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eaten = 0
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for match in self.regexes[self.state].finditer(text):
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for name, toktext in match.groupdict().iteritems():
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if toktext is not None:
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tok = self.toks[name]
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new_state = tok.next
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eaten += len(toktext)
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yield (tok.name, toktext)
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if new_state:
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self.state = new_state
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break
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text = text[eaten:]
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class JsLexer(Lexer):
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"""
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A Javascript lexer
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>>> lexer = JsLexer()
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>>> list(lexer.lex("a = 1"))
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[('id', 'a'), ('ws', ' '), ('punct', '='), ('ws', ' '), ('dnum', '1')]
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This doesn't properly handle non-Ascii characters in the Javascript source.
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"""
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# Because these tokens are matched as alternatives in a regex, longer
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# possibilities must appear in the list before shorter ones, for example,
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# '>>' before '>'.
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#
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# Note that we don't have to detect malformed Javascript, only properly
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# lex correct Javascript, so much of this is simplified.
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# Details of Javascript lexical structure are taken from
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# http://www.ecma-international.org/publications/files/ECMA-ST/ECMA-262.pdf
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# A useful explanation of automatic semicolon insertion is at
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# http://inimino.org/~inimino/blog/javascript_semicolons
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both_before = [
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Tok("comment", r"/\*(.|\n)*?\*/"),
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Tok("linecomment", r"//.*?$"),
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Tok("ws", r"\s+"),
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Tok("keyword", literals("""
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break case catch class const continue debugger
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default delete do else enum export extends
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finally for function if import in instanceof
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new return super switch this throw try typeof
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var void while with
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""", suffix=r"\b"), next='reg'),
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Tok("reserved", literals("null true false", suffix=r"\b"), next='div'),
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Tok("id", r"""
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([a-zA-Z_$ ]|\\u[0-9a-fA-Z]{4}) # first char
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([a-zA-Z_$0-9]|\\u[0-9a-fA-F]{4})* # rest chars
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""", next='div'),
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Tok("hnum", r"0[xX][0-9a-fA-F]+", next='div'),
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Tok("onum", r"0[0-7]+"),
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Tok("dnum", r"""
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( (0|[1-9][0-9]*) # DecimalIntegerLiteral
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\. # dot
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[0-9]* # DecimalDigits-opt
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([eE][-+]?[0-9]+)? # ExponentPart-opt
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\. # dot
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[0-9]+ # DecimalDigits
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([eE][-+]?[0-9]+)? # ExponentPart-opt
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(0|[1-9][0-9]*) # DecimalIntegerLiteral
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([eE][-+]?[0-9]+)? # ExponentPart-opt
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)
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""", next='div'),
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Tok("punct", literals("""
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>>>= === !== >>> <<= >>= <= >= == != << >> &&
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|| += -= *= %= &= |= ^=
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"""), next="reg"),
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Tok("punct", literals("++ -- ) ]"), next='div'),
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Tok("punct", literals("{ } ( [ . ; , < > + - * % & | ^ ! ~ ? : ="), next='reg'),
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Tok("string", r'"([^"\\]|(\\(.|\n)))*?"', next='div'),
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Tok("string", r"'([^'\\]|(\\(.|\n)))*?'", next='div'),
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]
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both_after = [
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Tok("other", r"."),
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]
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states = {
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'div': # slash will mean division
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both_before + [
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Tok("punct", literals("/= /"), next='reg'),
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] + both_after,
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'reg': # slash will mean regex
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both_before + [
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Tok("regex",
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r"""
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/ # opening slash
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# First character is..
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( [^*\\/[] # anything but * \ / or [
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| \\. # or an escape sequence
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| \[ # or a class, which has
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( [^\]\\] # anything but \ or ]
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| \\. # or an escape sequence
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)* # many times
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\]
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)
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# Following characters are same, except for excluding a star
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( [^\\/[] # anything but \ / or [
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| \\. # or an escape sequence
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| \[ # or a class, which has
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( [^\]\\] # anything but \ or ]
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| \\. # or an escape sequence
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)* # many times
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\]
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)* # many times
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/ # closing slash
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[a-zA-Z0-9]* # trailing flags
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""", next='div'),
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] + both_after,
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}
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def __init__(self):
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super(JsLexer, self).__init__(self.states, 'reg')
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def prepare_js_for_gettext(js):
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"""
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Convert the Javascript source `js` into something resembling C for
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xgettext.
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What actually happens is that all the regex literals are replaced with
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"REGEX".
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"""
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def escape_quotes(m):
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"""Used in a regex to properly escape double quotes."""
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s = m.group(0)
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if s == '"':
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return r'\"'
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else:
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return s
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lexer = JsLexer()
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c = []
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for name, tok in lexer.lex(js):
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if name == 'regex':
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# C doesn't grok regexes, and they aren't needed for gettext,
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# so just output a string instead.
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tok = '"REGEX"';
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elif name == 'string':
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# C doesn't have single-quoted strings, so make all strings
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# double-quoted.
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if tok.startswith("'"):
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guts = re.sub(r"\\.|.", escape_quotes, tok[1:-1])
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tok = '"' + guts + '"'
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elif name == 'id':
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# C can't deal with Unicode escapes in identifiers. We don't
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# need them for gettext anyway, so replace them with something
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# innocuous
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tok = tok.replace("\\", "U");
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c.append(tok)
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return ''.join(c)
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@ -31,11 +31,13 @@ class ExtractorTests(TestCase):
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def assertMsgId(self, msgid, s, use_quotes=True):
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if use_quotes:
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msgid = '"%s"' % msgid
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msgid = re.escape(msgid)
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return self.assertTrue(re.search('^msgid %s' % msgid, s, re.MULTILINE))
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def assertNotMsgId(self, msgid, s, use_quotes=True):
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if use_quotes:
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msgid = '"%s"' % msgid
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msgid = re.escape(msgid)
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return self.assertTrue(not re.search('^msgid %s' % msgid, s, re.MULTILINE))
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@ -73,7 +75,7 @@ class BasicExtractorTests(ExtractorTests):
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self.assertTrue(os.path.exists(self.PO_FILE))
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po_contents = open(self.PO_FILE, 'r').read()
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self.assertMsgId('I think that 100%% is more that 50%% of anything.', po_contents)
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self.assertMsgId('I think that 100%% is more that 50%% of %\(obj\)s.', po_contents)
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self.assertMsgId('I think that 100%% is more that 50%% of %(obj)s.', po_contents)
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def test_extraction_error(self):
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os.chdir(self.test_dir)
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po_contents = open(self.PO_FILE, 'r').read()
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self.assertMsgId('This literal should be included.', po_contents)
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self.assertMsgId('This one as well.', po_contents)
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self.assertMsgId(r'He said, \"hello\".', po_contents)
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self.assertMsgId("okkkk", po_contents)
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self.assertMsgId("TEXT", po_contents)
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self.assertMsgId("It's at http://example.com", po_contents)
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self.assertMsgId("String", po_contents)
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self.assertMsgId("/* but this one will be too */ 'cause there is no way of telling...", po_contents)
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self.assertMsgId("foo", po_contents)
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self.assertMsgId("bar", po_contents)
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self.assertMsgId("baz", po_contents)
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self.assertMsgId("quz", po_contents)
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self.assertMsgId("foobar", po_contents)
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class IgnoredExtractorTests(ExtractorTests):
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@ -1,4 +1,47 @@
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// '
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gettext('This literal should be included.')
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// '
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gettext('This one as well.')
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x = y; // '
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gettext("This one as well.")
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/** (from ticket 7704)
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* *****************************
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* AddModule main / window
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* @constructor
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* @class MyDesktop.AddModule
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* *****************************
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*/
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gettext('He said, \"hello".')
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// from ticket 14045
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function mfunc() {
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var val = 0;
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return val ? 1 : 0;
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}
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gettext('okkkk');
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print mysub();
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// from ticket 15495
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/* / ' */ gettext("TEXT");
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gettext("It's at http://example.com")
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// also from ticket 15495
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gettext("String"); // This comment won't be caught by pythonize_re and it contains "'" which is a string start in Perl
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/*
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* This one will be removed by the patch
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*/
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gettext("/* but this one will be too */ 'cause there is no way of telling...");
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f(/* ... if it's different from this one */);
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// from ticket 15331
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gettext("foo");
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true ? true : false;
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gettext("bar");
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true ? true : false;
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gettext("baz");
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true ? true : false; // ?
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gettext("quz");
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"?";
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gettext("foobar");
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@ -0,0 +1,217 @@
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"""Tests for jslex."""
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# encoding: utf-8
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# originally from https://bitbucket.org/ned/jslex
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import difflib
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from django.test import TestCase
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from django.utils.jslex import JsLexer, prepare_js_for_gettext
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class JsTokensTest(TestCase):
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LEX_CASES = [
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# ids
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("a ABC $ _ a123", ["id a", "id ABC", "id $", "id _", "id a123"]),
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(r"\u1234 abc\u0020 \u0065_\u0067", [r"id \u1234", r"id abc\u0020", r"id \u0065_\u0067"]),
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# numbers
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("123 1.234 0.123e-3 0 1E+40 1e1 .123", ["dnum 123", "dnum 1.234", "dnum 0.123e-3", "dnum 0", "dnum 1E+40", "dnum 1e1", "dnum .123"]),
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("0x1 0xabCD 0XABcd", ["hnum 0x1", "hnum 0xabCD", "hnum 0XABcd"]),
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("010 0377 090", ["onum 010", "onum 0377", "dnum 0", "dnum 90"]),
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("0xa123ghi", ["hnum 0xa123", "id ghi"]),
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# keywords
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("function Function FUNCTION", ["keyword function", "id Function", "id FUNCTION"]),
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("const constructor in inherits", ["keyword const", "id constructor", "keyword in", "id inherits"]),
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("true true_enough", ["reserved true", "id true_enough"]),
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# strings
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(''' 'hello' "hello" ''', ["string 'hello'", 'string "hello"']),
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(r""" 'don\'t' "don\"t" '"' "'" '\'' "\"" """,
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[r"""string 'don\'t'""", r'''string "don\"t"''', r"""string '"'""", r'''string "'"''', r"""string '\''""", r'''string "\""''']),
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(ur'"ƃuıxǝ⅂ ʇdıɹɔsɐʌɐſ\""', [ur'string "ƃuıxǝ⅂ ʇdıɹɔsɐʌɐſ\""']),
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# comments
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("a//b", ["id a", "linecomment //b"]),
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("/****/a/=2//hello", ["comment /****/", "id a", "punct /=", "dnum 2", "linecomment //hello"]),
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("/*\n * Header\n */\na=1;", ["comment /*\n * Header\n */", "id a", "punct =", "dnum 1", "punct ;"]),
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# punctuation
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("a+++b", ["id a", "punct ++", "punct +", "id b"]),
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# regex
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(r"a=/a*/,1", ["id a", "punct =", "regex /a*/", "punct ,", "dnum 1"]),
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(r"a=/a*[^/]+/,1", ["id a", "punct =", "regex /a*[^/]+/", "punct ,", "dnum 1"]),
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(r"a=/a*\[^/,1", ["id a", "punct =", r"regex /a*\[^/", "punct ,", "dnum 1"]),
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(r"a=/\//,1", ["id a", "punct =", r"regex /\//", "punct ,", "dnum 1"]),
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# next two are from http://www.mozilla.org/js/language/js20-2002-04/rationale/syntax.html#regular-expressions
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("""for (var x = a in foo && "</x>" || mot ? z:/x:3;x<5;y</g/i) {xyz(x++);}""",
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["keyword for", "punct (", "keyword var", "id x", "punct =", "id a", "keyword in",
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"id foo", "punct &&", 'string "</x>"', "punct ||", "id mot", "punct ?", "id z",
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"punct :", "regex /x:3;x<5;y</g", "punct /", "id i", "punct )", "punct {",
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"id xyz", "punct (", "id x", "punct ++", "punct )", "punct ;", "punct }"]),
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("""for (var x = a in foo && "</x>" || mot ? z/x:3;x<5;y</g/i) {xyz(x++);}""",
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["keyword for", "punct (", "keyword var", "id x", "punct =", "id a", "keyword in",
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"id foo", "punct &&", 'string "</x>"', "punct ||", "id mot", "punct ?", "id z",
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"punct /", "id x", "punct :", "dnum 3", "punct ;", "id x", "punct <", "dnum 5",
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"punct ;", "id y", "punct <", "regex /g/i", "punct )", "punct {",
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"id xyz", "punct (", "id x", "punct ++", "punct )", "punct ;", "punct }"]),
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# Various "illegal" regexes that are valid according to the std.
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(r"""/????/, /++++/, /[----]/ """, ["regex /????/", "punct ,", "regex /++++/", "punct ,", "regex /[----]/"]),
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# Stress cases from http://stackoverflow.com/questions/5533925/what-javascript-constructs-does-jslex-incorrectly-lex/5573409#5573409
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(r"""/\[/""", [r"""regex /\[/"""]),
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(r"""/[i]/""", [r"""regex /[i]/"""]),
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(r"""/[\]]/""", [r"""regex /[\]]/"""]),
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(r"""/a[\]]/""", [r"""regex /a[\]]/"""]),
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(r"""/a[\]]b/""", [r"""regex /a[\]]b/"""]),
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(r"""/[\]/]/gi""", [r"""regex /[\]/]/gi"""]),
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(r"""/\[[^\]]+\]/gi""", [r"""regex /\[[^\]]+\]/gi"""]),
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("""
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rexl.re = {
|
||||
NAME: /^(?!\d)(?:\w)+|^"(?:[^"]|"")+"/,
|
||||
UNQUOTED_LITERAL: /^@(?:(?!\d)(?:\w|\:)+|^"(?:[^"]|"")+")\[[^\]]+\]/,
|
||||
QUOTED_LITERAL: /^'(?:[^']|'')*'/,
|
||||
NUMERIC_LITERAL: /^[0-9]+(?:\.[0-9]*(?:[eE][-+][0-9]+)?)?/,
|
||||
SYMBOL: /^(?:==|=|<>|<=|<|>=|>|!~~|!~|~~|~|!==|!=|!~=|!~|!|&|\||\.|\:|,|\(|\)|\[|\]|\{|\}|\?|\:|;|@|\^|\/\+|\/|\*|\+|-)/
|
||||
};
|
||||
""",
|
||||
["id rexl", "punct .", "id re", "punct =", "punct {",
|
||||
"id NAME", "punct :", r"""regex /^(?!\d)(?:\w)+|^"(?:[^"]|"")+"/""", "punct ,",
|
||||
"id UNQUOTED_LITERAL", "punct :", r"""regex /^@(?:(?!\d)(?:\w|\:)+|^"(?:[^"]|"")+")\[[^\]]+\]/""", "punct ,",
|
||||
"id QUOTED_LITERAL", "punct :", r"""regex /^'(?:[^']|'')*'/""", "punct ,",
|
||||
"id NUMERIC_LITERAL", "punct :", r"""regex /^[0-9]+(?:\.[0-9]*(?:[eE][-+][0-9]+)?)?/""", "punct ,",
|
||||
"id SYMBOL", "punct :", r"""regex /^(?:==|=|<>|<=|<|>=|>|!~~|!~|~~|~|!==|!=|!~=|!~|!|&|\||\.|\:|,|\(|\)|\[|\]|\{|\}|\?|\:|;|@|\^|\/\+|\/|\*|\+|-)/""",
|
||||
"punct }", "punct ;"
|
||||
]),
|
||||
|
||||
("""
|
||||
rexl.re = {
|
||||
NAME: /^(?!\d)(?:\w)+|^"(?:[^"]|"")+"/,
|
||||
UNQUOTED_LITERAL: /^@(?:(?!\d)(?:\w|\:)+|^"(?:[^"]|"")+")\[[^\]]+\]/,
|
||||
QUOTED_LITERAL: /^'(?:[^']|'')*'/,
|
||||
NUMERIC_LITERAL: /^[0-9]+(?:\.[0-9]*(?:[eE][-+][0-9]+)?)?/,
|
||||
SYMBOL: /^(?:==|=|<>|<=|<|>=|>|!~~|!~|~~|~|!==|!=|!~=|!~|!|&|\||\.|\:|,|\(|\)|\[|\]|\{|\}|\?|\:|;|@|\^|\/\+|\/|\*|\+|-)/
|
||||
};
|
||||
str = '"';
|
||||
""",
|
||||
["id rexl", "punct .", "id re", "punct =", "punct {",
|
||||
"id NAME", "punct :", r"""regex /^(?!\d)(?:\w)+|^"(?:[^"]|"")+"/""", "punct ,",
|
||||
"id UNQUOTED_LITERAL", "punct :", r"""regex /^@(?:(?!\d)(?:\w|\:)+|^"(?:[^"]|"")+")\[[^\]]+\]/""", "punct ,",
|
||||
"id QUOTED_LITERAL", "punct :", r"""regex /^'(?:[^']|'')*'/""", "punct ,",
|
||||
"id NUMERIC_LITERAL", "punct :", r"""regex /^[0-9]+(?:\.[0-9]*(?:[eE][-+][0-9]+)?)?/""", "punct ,",
|
||||
"id SYMBOL", "punct :", r"""regex /^(?:==|=|<>|<=|<|>=|>|!~~|!~|~~|~|!==|!=|!~=|!~|!|&|\||\.|\:|,|\(|\)|\[|\]|\{|\}|\?|\:|;|@|\^|\/\+|\/|\*|\+|-)/""",
|
||||
"punct }", "punct ;",
|
||||
"id str", "punct =", """string '"'""", "punct ;",
|
||||
]),
|
||||
|
||||
(r""" this._js = "e.str(\"" + this.value.replace(/\\/g, "\\\\").replace(/"/g, "\\\"") + "\")"; """,
|
||||
["keyword this", "punct .", "id _js", "punct =", r'''string "e.str(\""''', "punct +", "keyword this", "punct .",
|
||||
"id value", "punct .", "id replace", "punct (", r"regex /\\/g", "punct ,", r'string "\\\\"', "punct )",
|
||||
"punct .", "id replace", "punct (", r'regex /"/g', "punct ,", r'string "\\\""', "punct )", "punct +",
|
||||
r'string "\")"', "punct ;"]),
|
||||
]
|
||||
|
||||
def make_function(input, toks):
|
||||
def test_func(self):
|
||||
lexer = JsLexer()
|
||||
result = ["%s %s" % (name, tok) for name, tok in lexer.lex(input) if name != 'ws']
|
||||
self.assertListEqual(result, toks)
|
||||
return test_func
|
||||
|
||||
for i, (input, toks) in enumerate(JsTokensTest.LEX_CASES):
|
||||
setattr(JsTokensTest, "test_case_%d" % i, make_function(input, toks))
|
||||
|
||||
|
||||
GETTEXT_CASES = (
|
||||
(
|
||||
r"""
|
||||
a = 1; /* /[0-9]+/ */
|
||||
b = 0x2a0b / 1; // /[0-9]+/
|
||||
c = 3;
|
||||
""",
|
||||
r"""
|
||||
a = 1; /* /[0-9]+/ */
|
||||
b = 0x2a0b / 1; // /[0-9]+/
|
||||
c = 3;
|
||||
"""
|
||||
), (
|
||||
r"""
|
||||
a = 1.234e-5;
|
||||
/*
|
||||
* /[0-9+/
|
||||
*/
|
||||
b = .0123;
|
||||
""",
|
||||
r"""
|
||||
a = 1.234e-5;
|
||||
/*
|
||||
* /[0-9+/
|
||||
*/
|
||||
b = .0123;
|
||||
"""
|
||||
), (
|
||||
r"""
|
||||
x = y / z;
|
||||
alert(gettext("hello"));
|
||||
x /= 3;
|
||||
""",
|
||||
r"""
|
||||
x = y / z;
|
||||
alert(gettext("hello"));
|
||||
x /= 3;
|
||||
"""
|
||||
), (
|
||||
r"""
|
||||
s = "Hello \"th/foo/ere\"";
|
||||
s = 'He\x23llo \'th/foo/ere\'';
|
||||
s = 'slash quote \", just quote "';
|
||||
""",
|
||||
r"""
|
||||
s = "Hello \"th/foo/ere\"";
|
||||
s = "He\x23llo \'th/foo/ere\'";
|
||||
s = "slash quote \", just quote \"";
|
||||
"""
|
||||
), (
|
||||
r"""
|
||||
s = "Line continuation\
|
||||
continued /hello/ still the string";/hello/;
|
||||
""",
|
||||
r"""
|
||||
s = "Line continuation\
|
||||
continued /hello/ still the string";"REGEX";
|
||||
"""
|
||||
), (
|
||||
r"""
|
||||
var regex = /pattern/;
|
||||
var regex2 = /matter/gm;
|
||||
var regex3 = /[*/]+/gm.foo("hey");
|
||||
""",
|
||||
r"""
|
||||
var regex = "REGEX";
|
||||
var regex2 = "REGEX";
|
||||
var regex3 = "REGEX".foo("hey");
|
||||
"""
|
||||
), (
|
||||
r"""
|
||||
for (var x = a in foo && "</x>" || mot ? z:/x:3;x<5;y</g/i) {xyz(x++);}
|
||||
for (var x = a in foo && "</x>" || mot ? z/x:3;x<5;y</g/i) {xyz(x++);}
|
||||
""",
|
||||
r"""
|
||||
for (var x = a in foo && "</x>" || mot ? z:"REGEX"/i) {xyz(x++);}
|
||||
for (var x = a in foo && "</x>" || mot ? z/x:3;x<5;y<"REGEX") {xyz(x++);}
|
||||
"""
|
||||
), (
|
||||
r"""
|
||||
\u1234xyz = gettext('Hello there');
|
||||
""", r"""
|
||||
Uu1234xyz = gettext("Hello there");
|
||||
"""
|
||||
)
|
||||
)
|
||||
|
||||
|
||||
class JsToCForGettextTest(TestCase):
|
||||
pass
|
||||
|
||||
def make_function(js, c):
|
||||
def test_func(self):
|
||||
self.assertMultiLineEqual(prepare_js_for_gettext(js), c)
|
||||
return test_func
|
||||
|
||||
for i, pair in enumerate(GETTEXT_CASES):
|
||||
setattr(JsToCForGettextTest, "test_case_%d" % i, make_function(*pair))
|
|
@ -18,3 +18,4 @@ from datastructures import *
|
|||
from tzinfo import *
|
||||
from datetime_safe import *
|
||||
from baseconv import *
|
||||
from jslex import *
|
||||
|
|
Loading…
Reference in New Issue