/// <summary>
/// Handle execution of the function identified by |name|. |object| is the
/// receiver ('this' object) of the function. |arguments| is the list of
/// arguments passed to the function. If execution succeeds set |retval| to the
/// function return value. If execution fails set |exception| to the exception
/// that will be thrown. Return true if execution was handled.
/// </summary>
/// <param name="name">The name of the function to execute.</param>
/// <param name="obj">The receiver ('this' object) of the function.</param>
/// <param name="arguments">The list of arguments passed to the function</param>
/// <param name="returnValue">If execution succeeds set |retval| to the function return value.</param>
/// <param name="exception">If execution fails set |exception| to the exception that will be thrown.</param>
/// <returns>Return true if execution was handled.</returns>
protected override bool Execute(string name, CefV8Value obj, CefV8Value[] arguments, out CefV8Value returnValue,
out string exception)
{
if (string.IsNullOrEmpty(name))
{
returnValue = CefV8Value.CreateUndefined();
exception = "Unknown event name";
return(false);
}
exception = null;
returnValue = null;
try
{
switch (name)
{
case MethodNameAddListener:
case MethodNameRemoveListener:
{
if (arguments == null || arguments.Length != 1 || !arguments[0].IsFunction)
{
exception = "Expected a callback as the only argument";
}
else
{
var context = CefV8Context.GetCurrentContext(); // TODO should this be disposed?
var v8Callback = arguments[0];
switch (name)
{
case MethodNameAddListener:
_plugin.AddEventListener(context, _eventName, v8Callback);
break;
case MethodNameRemoveListener:
_plugin.RemoveEventListener(context, _eventName, v8Callback);
break;
}
return(true);
}
break;
}
case MethodNameHasListener:
{
if (arguments == null || arguments.Length != 1 || !arguments[0].IsFunction)
{
exception = "Expected a callback as the only argument";
}
else
{
var v8Callback = arguments[0];
var hasListener = _plugin.HasEventListener(_eventName, v8Callback);
returnValue = CefV8Value.CreateBool(hasListener);
return(true);
}
break;
}
case MethodNameHasListeners:
{
var hasListener = _plugin.HasEventListeners(_eventName);
returnValue = CefV8Value.CreateBool(hasListener);
return(true);
}
}
}
catch (Exception ex)
{
Logger.Error("Execution of plugin event method {0} {1} {2} failed: {3}",
_plugin.Descriptor.PluginId,
_eventName,
name,
ex);
exception = ex.Message;
}
returnValue = CefV8Value.CreateUndefined();
return(false);
}