public bool Equals(JsDynamicObject other)
{
if (other is null)
{
return(false);
}
if (Handle.Type != other.Handle.Type)
{
return(false);
}
System.Diagnostics.Debug.Assert(Handle.Type == JsType.Object || Handle.Type == JsType.Function,
"Only objects are supported by JsDynamicObject atm.");
CheckDisposed();
// TODO: Do this using a native method, which would be more efficient.
var gObj = _host.GetMember(JsValue.Global, "Object");
try
{
var result = _host.InvokeByName("is",
gObj,
2,
new DotNetValue[]
{
DotNetValue.FromJsValue(Handle),
DotNetValue.FromJsValue(other.Handle)
});
return(result.TryGetObject(_host, typeof(bool), out object resultObj) && (bool)resultObj);
}
finally
{
_host.Release(gObj);
}
}
public bool TryGetObject(IHostInProcess host, Type targetType, out object result)
{
var releaseHandle = true;
try
{
switch (Type)
{
case JsType.Null:
releaseHandle = false;
result = null;
return(true);
case JsType.Object:
case JsType.Function:
releaseHandle = false;
var asDynamic = new JsDynamicObject(this, host);
var wasConverted = asDynamic.TryConvertIntern(targetType, out result);
if (wasConverted)
{
// Prevent GC release of `asDynamic` by disposing it now
// TODO DM 17.05.2020: The check for ArrayBuffer shows deeper design problems (conversion should be externalized?)
if (!ReferenceEquals(asDynamic, result) && targetType != typeof(ArrayBuffer))
{
asDynamic.Dispose();
}
return(true);
}
result = asDynamic;
return(true);
case JsType.String:
result = Marshal.PtrToStringUni(Value);
return(true);
case JsType.Number:
// TODO: This will break on 32 bit systems!
releaseHandle = false;
var numberValue = BitConverter.Int64BitsToDouble((long)Value);
if (targetType == typeof(int))
{
result = (int)numberValue;
}
else if (targetType == typeof(long))
{
result = (long)numberValue;
}
else
{
result = numberValue;
}
return(true);
case JsType.Boolean:
releaseHandle = false;
result = Value != IntPtr.Zero;
return(true);
case JsType.Error:
// This is not for error objects. This is whenever js code threw an exception!
throw new InvalidOperationException(host.StringFromNativeUtf8(Value));
case JsType.Undefined:
releaseHandle = false;
result = null;
return(false);
default:
throw new InvalidOperationException($"Unsupported JsType '{Type}'");
}
}
finally
{
if (releaseHandle)
{
host.Release(this);
}
}
}
public NodeBridge(IHostInProcess host)
{
_host = host;
Global = new JsDynamicObject(JsValue.Global, _host);
}