protected JsValue(IJavaScriptEngine engine, BaristaContext context, JavaScriptValueSafeHandle valueHandle)
{
m_javaScriptEngine = engine ?? throw new ArgumentNullException(nameof(engine));
m_context = context ?? throw new ArgumentNullException(nameof(context));
m_javaScriptReference = valueHandle ?? throw new ArgumentNullException(nameof(valueHandle));
//Let's just make sure that we're the correct type.
var reportedType = engine.JsGetValueType(valueHandle);
//if (reportedType != Type)
// throw new InvalidOperationException($"The underlying type ({reportedType}) does not match the type that is being created ({Type}). Ensure that correct value is being created.");
//Set the event that will be called prior to the engine collecting the value.
if ((this is JsNumber) == false)
{
//Set the event that will be called prior to the engine collecting the value.
JavaScriptObjectBeforeCollectCallback beforeCollectCallback = (IntPtr handle, IntPtr callbackState) =>
{
try
{
OnBeforeCollect(handle, callbackState);
}
catch
{
//Do Nothing.
}
};
m_beforeCollectCallbackDelegateHandle = GCHandle.Alloc(beforeCollectCallback);
//An exception thrown here is usually due to trying to associate a callback to a JsNumber.
Engine.JsSetObjectBeforeCollectCallback(valueHandle, IntPtr.Zero, beforeCollectCallback);
}
}
public BaristaModuleRecord(string name, JavaScriptValueSafeHandle moduleSpecifier, BaristaModuleRecord parentModule, IJavaScriptEngine engine, BaristaContext context, IBaristaModuleRecordFactory moduleRecordFactory, IBaristaModuleLoader moduleLoader, JavaScriptModuleRecord moduleRecord)
: base(engine, moduleRecord)
{
m_name = name ?? throw new ArgumentNullException(nameof(name));
m_moduleSpecifier = moduleSpecifier ?? throw new ArgumentNullException(nameof(moduleSpecifier));
m_parentModule = parentModule;
m_context = context ?? throw new ArgumentNullException(nameof(context));
m_moduleRecordFactory = moduleRecordFactory ?? throw new ArgumentNullException(nameof(moduleRecordFactory));
//Module loader is not required, but if not specified, imports will fail.
m_moduleLoader = moduleLoader;
//Associate functions that will handle module loading
if (m_parentModule == null)
{
//Set the fetch module callback for the module.
m_fetchImportedModuleCallbackHandle = InitFetchImportedModuleCallback(Handle);
//Set the notify callback for the module.
m_notifyCallbackHandle = InitNotifyModuleReadyCallback(Handle);
}
//Set the event that will be called prior to the engine collecting the context.
JavaScriptObjectBeforeCollectCallback beforeCollectCallback = (IntPtr handle, IntPtr callbackState) =>
{
OnBeforeCollect(handle, callbackState);
};
m_beforeCollectCallbackDelegateHandle = GCHandle.Alloc(beforeCollectCallback);
Engine.JsSetObjectBeforeCollectCallback(moduleRecord, IntPtr.Zero, beforeCollectCallback);
}
/// <summary>
/// Creates a new instance of a Barista Context.
/// </summary>
/// <param name="engine"></param>
/// <param name="contextHandle"></param>
public BaristaContext(IJavaScriptEngine engine, IBaristaValueFactoryBuilder valueFactoryBuilder, IBaristaConversionStrategy conversionStrategy, IBaristaModuleRecordFactory moduleRecordFactory, IPromiseTaskQueue taskQueue, JavaScriptContextSafeHandle contextHandle)
: base(engine, contextHandle)
{
if (valueFactoryBuilder == null)
{
throw new ArgumentNullException(nameof(valueFactoryBuilder));
}
m_taskFactory = new TaskFactory(
CancellationToken.None,
TaskCreationOptions.DenyChildAttach,
TaskContinuationOptions.None,
new CurrentThreadTaskScheduler());
m_conversionStrategy = conversionStrategy ?? throw new ArgumentNullException(nameof(conversionStrategy));
m_valueFactory = valueFactoryBuilder.CreateValueFactory(this);
m_undefinedValue = new Lazy <JsUndefined>(() => m_valueFactory.Undefined);
m_nullValue = new Lazy <JsNull>(() => m_valueFactory.Null);
m_trueValue = new Lazy <JsBoolean>(() => m_valueFactory.True);
m_falseValue = new Lazy <JsBoolean>(() => m_valueFactory.False);
m_globalValue = new Lazy <JsObject>(() => m_valueFactory.GlobalObject);
m_jsonValue = new Lazy <JsJSON>(() =>
{
var global = m_globalValue.Value;
return(global.GetProperty <JsJSON>("JSON"));
});
m_objectValue = new Lazy <JsObjectConstructor>(() =>
{
var global = m_globalValue.Value;
return(global.GetProperty <JsObjectConstructor>("Object"));
});
m_promiseValue = new Lazy <JsPromiseConstructor>(() =>
{
var global = m_globalValue.Value;
return(global.GetProperty <JsPromiseConstructor>("Promise"));
});
m_symbolValue = new Lazy <JsSymbolConstructor>(() =>
{
var global = m_globalValue.Value;
return(global.GetProperty <JsSymbolConstructor>("Symbol"));
});
m_promiseTaskQueue = taskQueue;
m_moduleRecordFactory = moduleRecordFactory ?? throw new ArgumentNullException(nameof(moduleRecordFactory));
//Set the event that will be called prior to the engine collecting the context.
JavaScriptObjectBeforeCollectCallback beforeCollectCallback = (IntPtr handle, IntPtr callbackState) =>
{
OnBeforeCollect(handle, callbackState);
};
m_beforeCollectCallbackDelegateHandle = GCHandle.Alloc(beforeCollectCallback);
Engine.JsSetObjectBeforeCollectCallback(contextHandle, IntPtr.Zero, beforeCollectCallback);
}
internal static extern JavaScriptErrorCode JsSetObjectBeforeCollectCallback(JavaScriptValue reference, IntPtr callbackState, JavaScriptObjectBeforeCollectCallback beforeCollectCallback);
public static void SetObjectBeforeCollectCallback(JavaScriptValue reference, IntPtr callbackState, JavaScriptObjectBeforeCollectCallback beforeCollectCallback)
{
Native.ThrowIfError(Native.JsSetObjectBeforeCollectCallback(reference, callbackState, beforeCollectCallback));
}
internal static extern JavaScriptErrorCode JsSetObjectBeforeCollectCallback(JavaScriptValue reference, IntPtr callbackState, JavaScriptObjectBeforeCollectCallback beforeCollectCallback);
public FaceTracker()
{
Inst = this;
faceDetector = FaceDetector.CreateAsync().AsTask().Result;
this.jsObjectCallback = OnFrameCollection;
}
public GCSyncService()
{
callback = new JavaScriptObjectBeforeCollectCallback(JsValueCollectCallback);
}
/// <summary>
/// Creates a new <see cref="JsBinder"/> instance.
/// </summary>
public JsBinder(JsContextScope scope)
{
_scope = scope;
_objects = new JsObjectCache(scope);
_jsGcCollect = JsGcCollect;
}