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bazarr/libs/js2py/internals/simplex.py

161 lines
4.0 KiB

from __future__ import unicode_literals
import six
if six.PY3:
basestring = str
long = int
xrange = range
unicode = str
#Undefined
class PyJsUndefined(object):
TYPE = 'Undefined'
Class = 'Undefined'
undefined = PyJsUndefined()
#Null
class PyJsNull(object):
TYPE = 'Null'
Class = 'Null'
null = PyJsNull()
Infinity = float('inf')
NaN = float('nan')
UNDEFINED_TYPE = PyJsUndefined
NULL_TYPE = PyJsNull
STRING_TYPE = unicode if six.PY2 else str
NUMBER_TYPE = float
BOOLEAN_TYPE = bool
# exactly 5 simplexes!
PRIMITIVES = frozenset(
[UNDEFINED_TYPE, NULL_TYPE, STRING_TYPE, NUMBER_TYPE, BOOLEAN_TYPE])
TYPE_NAMES = {
UNDEFINED_TYPE: 'Undefined',
NULL_TYPE: 'Null',
STRING_TYPE: 'String',
NUMBER_TYPE: 'Number',
BOOLEAN_TYPE: 'Boolean',
}
def Type(x):
# Any -> Str
return TYPE_NAMES.get(type(x), 'Object')
def GetClass(x):
# Any -> Str
cand = TYPE_NAMES.get(type(x))
if cand is None:
return x.Class
return cand
def is_undefined(self):
return self is undefined
def is_null(self):
return self is null
def is_primitive(self):
return type(self) in PRIMITIVES
def is_object(self):
return not is_primitive(self)
def is_callable(self):
return hasattr(self, 'call')
def is_infinity(self):
return self == Infinity or self == -Infinity
def is_nan(self):
return self != self # nan!=nan evaluates to True
def is_finite(self):
return not (is_nan(self) or is_infinity(self))
class JsException(Exception):
def __init__(self, typ=None, message=None, throw=None):
if typ is None and message is None and throw is None:
# it means its the trasnlator based error (old format), do nothing
self._translator_based = True
else:
assert throw is None or (typ is None
and message is None), (throw, typ,
message)
self._translator_based = False
self.typ = typ
self.message = message
self.throw = throw
def get_thrown_value(self, space):
if self.throw is not None:
return self.throw
else:
return space.NewError(self.typ, self.message)
def __str__(self):
if self._translator_based:
if self.mes.Class == 'Error':
return self.mes.callprop('toString').value
else:
return self.mes.to_string().value
else:
if self.throw is not None:
from .conversions import to_string
return to_string(self.throw)
else:
return self.typ + ': ' + self.message
def MakeError(typ, message=u'no info', throw=None):
return JsException(typ,
unicode(message) if message is not None else message,
throw)
def value_from_js_exception(js_exception, space):
if js_exception.throw is not None:
return js_exception.throw
else:
return space.NewError(js_exception.typ, js_exception.message)
def js_dtoa(number):
if is_nan(number):
return u'NaN'
elif is_infinity(number):
if number > 0:
return u'Infinity'
return u'-Infinity'
elif number == 0.:
return u'0'
elif abs(number) < 1e-6 or abs(number) >= 1e21:
frac, exponent = unicode(repr(float(number))).split('e')
# Remove leading zeros from the exponent.
exponent = int(exponent)
return frac + ('e' if exponent < 0 else 'e+') + unicode(exponent)
elif abs(number) < 1e-4: # python starts to return exp notation while we still want the prec
frac, exponent = unicode(repr(float(number))).split('e-')
base = u'0.' + u'0' * (int(exponent) - 1) + frac.lstrip('-').replace('.', '')
return base if number > 0. else u'-' + base
elif isinstance(number, long) or number.is_integer(): # dont print .0
return unicode(int(number))
return unicode(repr(number)) # python representation should be equivalent.