public JsObject CreatePromise(out JsFunction resolve, out JsFunction reject)
{
var promiseHandle = m_engine.JsCreatePromise(out JavaScriptValueSafeHandle resolveHandle, out JavaScriptValueSafeHandle rejectHandle);
resolve = CreateValue <JsFunction>(resolveHandle);
reject = CreateValue <JsFunction>(rejectHandle);
return(CreateValue <JsObject>(promiseHandle));
}
/// <summary>
/// Tests whether the prototype property of a constructor appears anywhere in the prototype chain of an object.
/// </summary>
/// <param name="obj"></param>
/// <param name="constructor"></param>
/// <returns></returns>
public bool InstanceOf(JsObject obj, JsFunction constructor)
{
if (IsDisposed)
{
throw new ObjectDisposedException(nameof(BaristaContext));
}
return(Engine.JsInstanceOf(obj.Handle, constructor.Handle));
}
public bool TryCreatePrototypeFunction(BaristaContext context, Type typeToConvert, out JsFunction ctor)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (typeToConvert == null)
{
throw new ArgumentNullException(nameof(typeToConvert));
}
if (m_prototypes.ContainsKey(typeToConvert))
{
ctor = m_prototypes[typeToConvert];
return(true);
}
var reflector = new ObjectReflector(typeToConvert);
JsFunction superCtor = null;
var baseType = reflector.GetBaseType();
if (baseType != null && !baseType.IsSameOrSubclass(typeof(JsValue)) && TryCreatePrototypeFunction(context, baseType, out JsFunction fnSuper))
{
superCtor = fnSuper;
}
var objectName = BaristaObjectAttribute.GetBaristaObjectNameFromType(typeToConvert);
//Get all the property descriptors for the specified type.
var staticPropertyDescriptors = context.CreateObject();
var instancePropertyDescriptors = context.CreateObject();
//Get static and instance properties.
ProjectProperties(context, staticPropertyDescriptors, reflector.GetProperties(false));
ProjectProperties(context, instancePropertyDescriptors, reflector.GetProperties(true));
//Get static and instance indexer properties.
ProjectIndexerProperties(context, staticPropertyDescriptors, reflector.GetIndexerProperties(false));
ProjectIndexerProperties(context, instancePropertyDescriptors, reflector.GetIndexerProperties(true));
//Get static and instance methods.
ProjectMethods(context, staticPropertyDescriptors, reflector, reflector.GetUniqueMethodsByName(false));
ProjectMethods(context, instancePropertyDescriptors, reflector, reflector.GetUniqueMethodsByName(true));
//Get static and instance events.
ProjectEvents(context, staticPropertyDescriptors, reflector, reflector.GetEventTable(false));
ProjectEvents(context, instancePropertyDescriptors, reflector, reflector.GetEventTable(true));
//Get the [[iterator]] property.
ProjectIEnumerable(context, instancePropertyDescriptors, reflector);
JsFunction fnCtor;
var publicConstructors = reflector.GetConstructors();
if (publicConstructors.Any())
{
fnCtor = context.CreateFunction(new BaristaFunctionDelegate((calleeObj, isConstructCall, thisObj, args) =>
{
if (thisObj == null)
{
var ex = context.CreateTypeError($"Failed to construct '{objectName}': 'this' must be specified.");
context.CurrentScope.SetException(ex);
return(context.Undefined);
}
if (superCtor != null)
{
superCtor.Call(thisObj);
}
context.Object.DefineProperties(thisObj, instancePropertyDescriptors);
//If this isn't a construct call, don't attempt to set the bean
if (!isConstructCall)
{
return(thisObj);
}
//Set our native object.
JsExternalObject externalObject = null;
//!!Special condition -- if there's exactly one argument, and if it matches the enclosing type,
//don't invoke the type's constructor, rather, just wrap the object with the JsObject.
if (args.Length == 1 && args[0].GetType() == typeToConvert)
{
externalObject = context.CreateExternalObject(args[0]);
}
else
{
try
{
var bestConstructor = reflector.GetConstructorBestMatch(args);
if (bestConstructor == null)
{
var ex = context.CreateTypeError($"Failed to construct '{objectName}': Could not find a matching constructor for the provided arguments.");
context.CurrentScope.SetException(ex);
return(context.Undefined);
}
//Convert the args into the native args of the constructor.
var constructorParams = bestConstructor.GetParameters();
var convertedArgs = ConvertArgsToParamTypes(context, args, constructorParams);
var newObj = bestConstructor.Invoke(convertedArgs);
externalObject = context.CreateExternalObject(newObj);
}
catch (Exception ex)
{
context.CurrentScope.SetException(context.CreateError(ex.Message));
return(context.Undefined);
}
}
thisObj.SetBean(externalObject);
return(thisObj);
}), objectName);
}
else
{
fnCtor = context.CreateFunction(new BaristaFunctionDelegate((calleeObj, isConstructCall, thisObj, args) =>
{
var ex = context.CreateTypeError($"Failed to construct '{objectName}': This object cannot be constructed.");
context.CurrentScope.SetException(ex);
return(context.Undefined);
}), objectName);
}
//We've got everything we need.
fnCtor.Prototype = context.Object.Create(superCtor == null ? context.Object.Prototype : superCtor.Prototype);
context.Object.DefineProperties(fnCtor, staticPropertyDescriptors);
m_prototypes.Add(typeToConvert, fnCtor);
ctor = fnCtor;
return(true);
}
public JsObject CreatePromise(out JsFunction resolve, out JsFunction reject)
{
return(ValueFactory.CreatePromise(out resolve, out reject));
}
public void Enqueue(JsFunction promise)
{
m_taskQueue.Enqueue(promise);
}
/// <summary>
/// Returns a new JavaScriptValue for the specified handle querying for the handle's value type.
/// </summary>
/// <remarks>
/// Use the valueType parameter carefully. If the resulting type does not match the handle type unexpected issues may occur.
/// </remarks>
/// <returns>The JavaScript Value that represents the handle</returns>
public JsValue CreateValue(JavaScriptValueSafeHandle valueHandle, JsValueType?valueType = null)
{
if (valueHandle == JavaScriptValueSafeHandle.Invalid)
{
return(null);
}
return(m_valuePool.GetOrAdd(valueHandle, () =>
{
if (valueType.HasValue == false)
{
valueType = m_engine.JsGetValueType(valueHandle);
}
JsValue result;
switch (valueType.Value)
{
case JsValueType.Array:
result = new JsArray(m_engine, Context, valueHandle);
break;
case JsValueType.ArrayBuffer:
result = new JsArrayBuffer(m_engine, Context, valueHandle);
break;
case JsValueType.Boolean:
result = new JsBoolean(m_engine, Context, valueHandle);
break;
case JsValueType.DataView:
result = new JsDataView(m_engine, Context, valueHandle);
break;
case JsValueType.Error:
result = new JsError(m_engine, Context, valueHandle);
break;
case JsValueType.Function:
result = new JsFunction(m_engine, Context, valueHandle);
break;
case JsValueType.Null:
result = new JsNull(m_engine, Context, valueHandle);
break;
case JsValueType.Number:
result = new JsNumber(m_engine, Context, valueHandle);
break;
case JsValueType.Object:
result = new JsObject(m_engine, Context, valueHandle);
break;
case JsValueType.String:
result = new JsString(m_engine, Context, valueHandle);
break;
case JsValueType.Symbol:
result = new JsSymbol(m_engine, Context, valueHandle);
break;
case JsValueType.TypedArray:
result = new JsTypedArray(m_engine, Context, valueHandle);
break;
case JsValueType.Undefined:
result = new JsUndefined(m_engine, Context, valueHandle);
break;
default:
throw new NotImplementedException($"Error Creating JavaScript Value: The JavaScript Value Type '{valueType}' is unknown, invalid, or has not been implemented.");
}
result.BeforeCollect += JsValueBeforeCollectCallback;
return result;
}));
}
