private bool TryExtractEvent(ISymbol symbol, string defaultEventEmitterName, [NotNullWhen(returnValue: true)] out ReactEvent?reactEvent)
{
if (TryExtractCallback(symbol, defaultEventEmitterName, ReactTypes.ReactEventAttribute, out var callbackParameters, out var name, out var declaredModuleName))
{
reactEvent = new ReactEvent(symbol, callbackParameters, name, declaredModuleName);
return(true);
}
reactEvent = null;
return(false);
}
internal StatementSyntax AddEvent(ReactEvent evnt)
{
// generates:
// moduleBuilder.AddInitializer((IReactContext reactContext) =>
// module.MyEvent = (ArgType0 arg0, ArgType1 arg1, ...) => new ReactContext(reactContext).EmitJsEvent("eventEmitterName", "eventName", arg0, arg1, ...);
return(InvocationStatement(
MemberAccessExpression(ReactNativeNames.ModuleBuilder, ReactNativeNames.AddInitializer),
ParenthesizedLambdaExpression(
parameterList: ParameterList(
Parameter(ReactNativeNames.ReactContextLocalName).WithType(ReactTypes.IReactContext.ToTypeSyntax())),
block: null,
expressionBody: GenerateCallback(evnt, ReactNativeNames.EmitJSEventFunctionName))));
}