/// <summary>
/// This method creates a new <see cref="JavaScriptValue"/> representing a JavaScript function, and
/// performs the binding of the resulting function with the native host function. This ensures that the
/// host function will not be garbage collected as long as the JavaScript function has not been garbage
/// collected.
/// </summary>
/// <param name="func">The host function used to create the JavaScript function and binding.</param>
public JavaScriptValue BindFunction(JavaScriptNativeFunction func)
{
return(_scope.Run(() =>
{
var jsFunc = JsSafeDecorator.Decorate(func);
var jsValue = JavaScriptValue.CreateFunction(jsFunc);
Link(jsValue, jsFunc);
return jsValue;
}));
}
/// <summary>
/// Creates the <see cref="JsBinding"/> instance representing the new bound JavaScript object.
/// </summary>
public JsBinding Build()
{
return(_scope.Run(() =>
{
// Create a host object binding or new JS Object binding
var jsValue = null != _boundTo
? _binder.BindObject(_boundTo)
: JavaScriptValue.CreateObject();
var binding = new JsBinding(_scope, _binder, _interop, jsValue);
// Bind Host Object Methods, Properties, and Fields if bound to host object
if (null != _boundTo && null != _hostType)
{
BindMethods(binding, _hostType, _boundTo);
BindProperties(binding, _hostType, _boundTo);
BindFields(binding, _hostType, _boundTo);
}
// Set custom binding values
if (null != _values)
{
for (int i = 0; i < _values.Count; ++i)
{
var valueDescriptor = _values[i];
binding.SetValue(valueDescriptor.Name, valueDescriptor.Value, valueDescriptor.ValueType);
}
}
return binding;
}));
}
/// <summary>
/// This method binds a function to a specific field on a JavaScript object.
/// </summary>
/// <param name="name">The name of the field.</param>
/// <param name="jsFunction">The callback function to execute when the JavaScript function is invoked.</param>
/// <param name="instanceData">Any instance data that should be passed when the function is executed.</param>
public void AddInstanceFunction(string name, JavaScriptNativeFunction jsFunction, IntPtr instanceData)
{
_scope.Run(() =>
{
var jsValue = _binder.BindInstanceFunction(jsFunction, instanceData);
_value.SetProperty(JavaScriptPropertyId.FromString(name), jsValue, true);
});
}
/// <inheritdoc />
public object Apply(object @this, params object[] args)
{
return(_scope.Run(() =>
{
JavaScriptValue[] jsValues = new JavaScriptValue[1 + args.Length];
if (_binding.IsValid)
{
jsValues[0] = _binding;
}
else
{
jsValues[0] = null != @this ? _interop.ToJsObject(@this, @this.GetType()) : JavaScriptValue.Undefined;
}
for (var i = 0; i < args.Length; ++i)
{
var arg = args[i];
jsValues[i + 1] = null != arg ? _interop.ToJsObject(arg, arg.GetType()) : JavaScriptValue.Null;
}
return TryInvoke(jsValues);
}));
}
/// <summary>
/// Creates a new <see cref="JsModule"/> instance.
/// </summary>
public JsModule(JsContextScope scope, JsBinder binder, JsInterop interop, string moduleId)
{
_scope = scope;
_binder = binder;
_interop = interop;
ModuleId = moduleId;
// Create JS Representation
Module = _scope.Run(() =>
{
var jsValue = JavaScriptValue.CreateObject();
jsValue.AddRef();
return(new JsBinding(_scope, _binder, _interop, jsValue));
});
}
/// <inheritdoc/>
public T GetExportedValue <T>(string name)
{
return(_scope.Run(() =>
{
if (null == _exports)
{
if (!Module.HasValue("exports"))
{
return default(T);
}
var exports = Module.GetValue("exports");
_exports = new JsBinding(_scope, _binder, _interop, exports);
}
return _exports.GetValue <T>(name);
}));
}
