private JsErrorCode FetchImportedModule(JsModuleRecord referencingModule, JsValue specifier,
out JsModuleRecord dependentModuleRecord)
{
string modulePath = specifier.ValueType == JsValueType.String ?
specifier.ToString() : string.Empty;
string moduleFullPath = GetModuleFullPath(referencingModule, modulePath);
if (_moduleCache.ContainsKey(moduleFullPath))
{
dependentModuleRecord = _moduleCache[moduleFullPath];
}
else
{
dependentModuleRecord = JsModuleRecord.Create(referencingModule, modulePath, moduleFullPath);
dependentModuleRecord.AddRef();
_moduleCache[moduleFullPath] = dependentModuleRecord;
ModuleJob job = new ModuleJob
{
Module = dependentModuleRecord,
Script = string.Empty,
SourceUrl = moduleFullPath,
IsParsed = false
};
_moduleJobQueue.Enqueue(job);
}
return(JsErrorCode.NoError);
}
private JsValue EvaluateModuleInternal(string code, string path, out JsValue moduleNamespace)
{
JsModuleRecord invalidModule = JsModuleRecord.Invalid;
string modulePath = path;
string moduleFullPath = GetModuleFullPath(invalidModule, modulePath);
JsValue result;
lock (_evaluationSynchronizer)
{
JsModuleRecord module = JsModuleRecord.Create(invalidModule, modulePath, moduleFullPath);
module.SetFetchImportedModuleCallback(_fetchImportedModuleCallback);
module.SetNotifyModuleReadyCallback(_notifyModuleReadyCallback);
ModuleJob job = new ModuleJob
{
Module = module,
Script = code,
SourceUrl = moduleFullPath,
IsParsed = false
};
_moduleJobQueue.Enqueue(job);
try
{
result = EvaluateModulesTree(out moduleNamespace);
JsValue exception = module.Exception;
if (exception.IsValid)
{
JsValue metadata = JsValue.Invalid;
if (!JsContext.HasException)
{
JsErrorHelpers.SetException(exception);
}
metadata = JsContext.GetAndClearExceptionWithMetadata();
throw JsErrorHelpers.CreateScriptExceptionFromMetadata(metadata);
}
}
finally
{
_moduleJobQueue.Clear();
module.Release();
}
}
return(result);
}
private JsErrorCode NotifyModuleReady(JsModuleRecord referencingModule, JsValue exception)
{
if (!exception.IsValid)
{
ModuleJob job = new ModuleJob
{
Module = referencingModule,
Script = string.Empty,
SourceUrl = string.Empty,
IsParsed = true
};
_moduleJobQueue.Enqueue(job);
}
return(JsErrorCode.NoError);
}
private JsValue EvaluateModulesTree(out JsValue moduleNamespace)
{
JsValue result = JsValue.Invalid;
moduleNamespace = JsValue.Invalid;
while (_moduleJobQueue.Count > 0)
{
ModuleJob job = _moduleJobQueue.Dequeue();
JsModuleRecord module = job.Module;
if (job.IsParsed)
{
result = module.Evaluate();
if (result.IsValid)
{
moduleNamespace = module.Namespace;
}
}
else
{
string code = job.Script;
if (code.Length == 0)
{
string path = job.SourceUrl;
try
{
code = File.ReadAllText(path.TrimStart('/'));
}
catch (IOException e) when(e is FileNotFoundException || e is DirectoryNotFoundException)
{
string errorMessage = string.Format(Strings.Runtime_ModuleNotFound, path);
JsValue errorValue = JsErrorHelpers.CreateError(errorMessage);
module.Exception = errorValue;
break;
}
catch (Exception e)
{
string errorMessage = string.Format(Strings.Runtime_ModuleNotLoaded, path, e.Message);
JsValue errorValue = JsErrorHelpers.CreateError(e.Message);
module.Exception = errorValue;
break;
}
}
JsValue exception;
module.ParseSource(code, _getNextSourceContext(), out exception);
if (exception.IsValid)
{
break;
}
}
}
return(result);
}
