protected static void defineReadOnlyFunction(
final JSObject on, final GlobalObject globalObject, String name, final Object value) {
PropertyDescriptor desc = new PropertyDescriptor();
desc.set(Names.VALUE, value);
desc.set(Names.WRITABLE, false);
desc.set(Names.ENUMERABLE, false);
desc.set(Names.CONFIGURABLE, false);
on.defineOwnProperty(null, name, desc, false);
}
@Override
public Object call(ExecutionContext context, Object self, Object... args) {
// 15.4.4.10
JSObject o = Types.toObject(context, self);
JSObject a = BuiltinArray.newArray(context);
long len = Types.toUint32(context, o.get(context, "length"));
long relativeStart = Types.toInteger(context, args[0]);
long k = Math.min(relativeStart, len);
if (relativeStart < 0) {
k = Math.max(len + relativeStart, 0);
}
long relativeEnd = len;
if (args[1] != Types.UNDEFINED) {
relativeEnd = Types.toInteger(context, args[1]);
}
long finalPos = Math.min(relativeEnd, len);
if (relativeEnd < 0) {
finalPos = Math.max(len + relativeEnd, 0);
}
long n = 0;
while (k < finalPos) {
boolean kPresent = o.hasProperty(context, "" + k);
if (kPresent) {
final Object kValue = o.get(context, "" + k);
a.defineOwnProperty(
context,
"" + n,
PropertyDescriptor.newDataPropertyDescriptor(kValue, true, true, true),
false);
}
++k;
++n;
}
return a;
}
@Override
public Object interpret(ExecutionContext context) {
DynArray array = BuiltinArray.newArray(context);
int numElements = this.exprs.size();
int len = 0;
for (int i = 0; i < numElements; ++i) {
Expression each = this.exprs.get(i);
Object value = null;
if (each != null) {
value = getValue(this.exprGets.get(i), context, each.interpret(context));
array.defineOwnProperty(
context,
"" + i,
PropertyDescriptor.newPropertyDescriptorForObjectInitializer(value),
false);
}
++len;
}
array.put(context, "length", (long) len, true);
return (array);
}