bazarr/libs/js2py/internals/constructors/jsobject.py

205 lines
7.1 KiB
Python
Raw Normal View History

from __future__ import unicode_literals
from ..conversions import *
from ..func_utils import *
from ..base import is_data_descriptor
import six
def Object(this, args):
val = get_arg(args, 0)
if is_null(val) or is_undefined(val):
return args.space.NewObject()
return to_object(val, args.space)
def ObjectCreate(args, space):
if len(args):
val = get_arg(args, 0)
if is_object(val):
# Implementation dependent, but my will simply return :)
return val
elif type(val) in (NUMBER_TYPE, STRING_TYPE, BOOLEAN_TYPE):
return to_object(val, space)
return space.NewObject()
class ObjectMethods:
def getPrototypeOf(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError',
'Object.getPrototypeOf called on non-object')
return null if obj.prototype is None else obj.prototype
def getOwnPropertyDescriptor(this, args):
obj = get_arg(args, 0)
prop = get_arg(args, 1)
if not is_object(obj):
raise MakeError(
'TypeError',
'Object.getOwnPropertyDescriptor called on non-object')
desc = obj.own.get(to_string(prop))
return convert_to_js_type(desc, args.space)
def getOwnPropertyNames(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError(
'TypeError',
'Object.getOwnPropertyDescriptor called on non-object')
return args.space.ConstructArray(obj.own.keys())
def create(this, args):
obj = get_arg(args, 0)
if not (is_object(obj) or is_null(obj)):
raise MakeError('TypeError',
'Object prototype may only be an Object or null')
temp = args.space.NewObject()
temp.prototype = None if is_null(obj) else obj
if len(args) > 1 and not is_undefined(args[1]):
if six.PY2:
args.tup = (args[1], )
ObjectMethods.defineProperties.__func__(temp, args)
else:
args.tup = (args[1], )
ObjectMethods.defineProperties(temp, args)
return temp
def defineProperty(this, args):
obj = get_arg(args, 0)
prop = get_arg(args, 1)
attrs = get_arg(args, 2)
if not is_object(obj):
raise MakeError('TypeError',
'Object.defineProperty called on non-object')
name = to_string(prop)
if not obj.define_own_property(name, ToPropertyDescriptor(attrs),
False):
raise MakeError('TypeError', 'Cannot redefine property: %s' % name)
return obj
def defineProperties(this, args):
obj = get_arg(args, 0)
properties = get_arg(args, 1)
if not is_object(obj):
raise MakeError('TypeError',
'Object.defineProperties called on non-object')
props = to_object(properties, args.space)
for k, v in props.own.items():
if not v.get('enumerable'):
continue
desc = ToPropertyDescriptor(props.get(unicode(k)))
if not obj.define_own_property(unicode(k), desc, False):
raise MakeError('TypeError',
'Failed to define own property: %s' % k)
return obj
def seal(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError', 'Object.seal called on non-object')
for desc in obj.own.values():
desc['configurable'] = False
obj.extensible = False
return obj
def freeze(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError', 'Object.freeze called on non-object')
for desc in obj.own.values():
desc['configurable'] = False
if is_data_descriptor(desc):
desc['writable'] = False
obj.extensible = False
return obj
def preventExtensions(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError',
'Object.preventExtensions on non-object')
obj.extensible = False
return obj
def isSealed(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError',
'Object.isSealed called on non-object')
if obj.extensible:
return False
for desc in obj.own.values():
if desc.get('configurable'):
return False
return True
def isFrozen(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError',
'Object.isFrozen called on non-object')
if obj.extensible:
return False
for desc in obj.own.values():
if desc.get('configurable'):
return False
if is_data_descriptor(desc) and desc.get('writable'):
return False
return True
def isExtensible(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError',
'Object.isExtensible called on non-object')
return obj.extensible
def keys(this, args):
obj = get_arg(args, 0)
if not is_object(obj):
raise MakeError('TypeError', 'Object.keys called on non-object')
return args.space.ConstructArray([
unicode(e) for e, d in six.iteritems(obj.own)
if d.get('enumerable')
])
# some utility functions:
def ToPropertyDescriptor(obj): # page 38 (50 absolute)
if not is_object(obj):
raise MakeError('TypeError',
'Can\'t convert non-object to property descriptor')
desc = {}
if obj.has_property('enumerable'):
desc['enumerable'] = to_boolean(obj.get('enumerable'))
if obj.has_property('configurable'):
desc['configurable'] = to_boolean(obj.get('configurable'))
if obj.has_property('value'):
desc['value'] = obj.get('value')
if obj.has_property('writable'):
desc['writable'] = to_boolean(obj.get('writable'))
if obj.has_property('get'):
cand = obj.get('get')
if not (is_undefined(cand) or is_callable(cand)):
raise MakeError(
'TypeError',
'Invalid getter (it has to be a function or undefined)')
desc['get'] = cand
if obj.has_property('set'):
cand = obj.get('set')
if not (is_undefined(cand) or is_callable(cand)):
raise MakeError(
'TypeError',
'Invalid setter (it has to be a function or undefined)')
desc['set'] = cand
if ('get' in desc or 'set' in desc) and ('value' in desc
or 'writable' in desc):
raise MakeError(
'TypeError',
'Invalid property. A property cannot both have accessors and be writable or have a value.'
)
return desc