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