/// <summary>
/// Determines whether an object has a property
/// </summary>
/// <remarks>
/// Requires an active script context.
/// </remarks>
/// <param name="source">The JavaScript value</param>
/// <param name="propertyName">The name of the property</param>
/// <returns>Whether the object (or a prototype) has the property</returns>
public static bool HasProperty(this JsValue source, string propertyName)
{
JsPropertyId propertyId = JsPropertyId.FromString(propertyName);
bool result = source.HasProperty(propertyId);
return(result);
}
protected override bool InnerHasVariable(string variableName)
{
bool result = _dispatcher.Invoke(() =>
{
using (CreateJsScope())
{
try
{
JsValue globalObj = JsValue.GlobalObject;
JsPropertyId variableId = JsPropertyId.FromString(variableName);
bool variableExist = globalObj.HasProperty(variableId);
if (variableExist)
{
JsValue variableValue = globalObj.GetProperty(variableId);
variableExist = variableValue.ValueType != JsValueType.Undefined;
}
return(variableExist);
}
catch (OriginalException e)
{
throw WrapJsException(e);
}
}
});
return(result);
}
protected override object InnerCallFunction(string functionName, params object[] args)
{
object result = _dispatcher.Invoke(() =>
{
using (CreateJsScope())
{
try
{
JsValue globalObj = JsValue.GlobalObject;
JsPropertyId functionId = JsPropertyId.FromString(functionName);
bool functionExist = globalObj.HasProperty(functionId);
if (!functionExist)
{
throw new JsRuntimeException(
string.Format(CoreStrings.Runtime_FunctionNotExist, functionName));
}
JsValue resultValue;
JsValue functionValue = globalObj.GetProperty(functionId);
if (args.Length > 0)
{
JsValue[] processedArgs = MapToScriptType(args);
foreach (JsValue processedArg in processedArgs)
{
AddReferenceToValue(processedArg);
}
JsValue[] allProcessedArgs = new[] { globalObj }
.Concat(processedArgs)
.ToArray()
;
resultValue = functionValue.CallFunction(allProcessedArgs);
foreach (JsValue processedArg in processedArgs)
{
RemoveReferenceToValue(processedArg);
}
}
else
{
resultValue = functionValue.CallFunction(globalObj);
}
return(MapToHostType(resultValue));
}
catch (OriginalJsException e)
{
throw ConvertJsExceptionToJsRuntimeException(e);
}
}
});
return(result);
}
/// <summary>
/// Makes a mapping of value from the script type to a host type
/// </summary>
/// <param name="value">The source value</param>
/// <returns>The mapped value</returns>
public object MapToHostType(JsValue value)
{
JsValueType valueType = value.ValueType;
object result = null;
switch (valueType)
{
case JsValueType.Null:
result = null;
break;
case JsValueType.Undefined: // Undefined is not mapped
result = value;
break;
case JsValueType.Boolean:
result = value.ToBoolean();
break;
case JsValueType.Number:
result = NumericHelpers.CastDoubleValueToCorrectType(value.ToDouble());
break;
case JsValueType.String:
result = value.ToString();
break;
case JsValueType.Function:
JsPropertyId externalObjectPropertyId = JsPropertyId.FromString(ExternalObjectPropertyName);
if (value.HasProperty(externalObjectPropertyId))
{
JsValue externalObjectValue = value.GetProperty(externalObjectPropertyId);
result = externalObjectValue.HasExternalData ?
GCHandle.FromIntPtr(externalObjectValue.ExternalData).Target : null;
}
result ??= value.ConvertToObject();
break;
case JsValueType.Object:
case JsValueType.Error:
case JsValueType.Array:
case JsValueType.Symbol:
case JsValueType.ArrayBuffer:
case JsValueType.TypedArray:
case JsValueType.DataView:
result = value.HasExternalData ?
GCHandle.FromIntPtr(value.ExternalData).Target : value.ConvertToObject();
break;
default:
throw new ArgumentOutOfRangeException();
}
return(result);
}
protected override void InnerRemoveVariable(string variableName)
{
InvokeScript(() =>
{
JsValue globalObj = JsValue.GlobalObject;
JsPropertyId variableId = JsPropertyId.FromString(variableName);
if (globalObj.HasProperty(variableId))
{
globalObj.SetProperty(variableId, JsValue.Undefined, true);
}
});
}
protected override object InnerCallFunction(string functionName, params object[] args)
{
object result = InvokeScript(() =>
{
JsValue globalObj = JsValue.GlobalObject;
JsPropertyId functionId = JsPropertyId.FromString(functionName);
bool functionExist = globalObj.HasProperty(functionId);
if (!functionExist)
{
throw new JsRuntimeException(
string.Format(CoreStrings.Runtime_FunctionNotExist, functionName));
}
JsValue resultValue;
JsValue functionValue = globalObj.GetProperty(functionId);
if (args.Length > 0)
{
JsValue[] processedArgs = MapToScriptType(args);
foreach (JsValue processedArg in processedArgs)
{
AddReferenceToValue(processedArg);
}
JsValue[] allProcessedArgs = new[] { globalObj }.Concat(processedArgs).ToArray();
resultValue = functionValue.CallFunction(allProcessedArgs);
foreach (JsValue processedArg in processedArgs)
{
RemoveReferenceToValue(processedArg);
}
}
else
{
resultValue = functionValue.CallFunction(globalObj);
}
//modified by chuan.yin in 2017/4/29
//return MapToHostType(resultValue);
return(ConvertJsObjectToNetObject(resultValue));
});
return(result);
}
protected override bool InnerHasVariable(string variableName)
{
bool result = InvokeScript(() =>
{
JsValue globalObj = JsValue.GlobalObject;
JsPropertyId variableId = JsPropertyId.FromString(variableName);
bool variableExist = globalObj.HasProperty(variableId);
if (variableExist)
{
JsValue variableValue = globalObj.GetProperty(variableId);
variableExist = variableValue.ValueType != JsValueType.Undefined;
}
return(variableExist);
});
return(result);
}
protected override void InnerRemoveVariable(string variableName)
{
_dispatcher.Invoke(() =>
{
using (CreateJsScope())
{
try
{
JsValue globalObj = JsValue.GlobalObject;
JsPropertyId variableId = JsPropertyId.FromString(variableName);
if (globalObj.HasProperty(variableId))
{
globalObj.SetProperty(variableId, JsValue.Undefined, true);
}
}
catch (OriginalException e)
{
throw WrapJsException(e);
}
}
});
}
private static WrapperException WrapJsException(OriginalException originalException,
string defaultDocumentName = null)
{
WrapperException wrapperException;
JsErrorCode errorCode = originalException.ErrorCode;
string description = originalException.Message;
string message = description;
string type = string.Empty;
string documentName = defaultDocumentName ?? string.Empty;
int lineNumber = 0;
int columnNumber = 0;
string callStack = string.Empty;
string sourceFragment = string.Empty;
var originalScriptException = originalException as OriginalScriptException;
if (originalScriptException != null)
{
JsValue metadataValue = originalScriptException.Metadata;
if (metadataValue.IsValid)
{
JsValue errorValue = metadataValue.GetProperty("exception");
JsValueType errorValueType = errorValue.ValueType;
if (errorValueType == JsValueType.Error ||
errorValueType == JsValueType.Object)
{
JsPropertyId innerErrorPropertyId = JsPropertyId.FromString("innerException");
if (errorValue.HasProperty(innerErrorPropertyId))
{
JsValue innerErrorValue = errorValue.GetProperty(innerErrorPropertyId);
JsPropertyId metadataPropertyId = JsPropertyId.FromString("metadata");
if (innerErrorValue.HasProperty(metadataPropertyId))
{
errorValue = innerErrorValue;
metadataValue = innerErrorValue.GetProperty(metadataPropertyId);
}
}
JsValue messagePropertyValue = errorValue.GetProperty("message");
string localDescription = messagePropertyValue.ConvertToString().ToString();
if (!string.IsNullOrWhiteSpace(localDescription))
{
description = localDescription;
}
JsValue namePropertyValue = errorValue.GetProperty("name");
type = namePropertyValue.ValueType == JsValueType.String ?
namePropertyValue.ToString() : string.Empty;
JsPropertyId descriptionPropertyId = JsPropertyId.FromString("description");
if (errorValue.HasProperty(descriptionPropertyId))
{
JsValue descriptionPropertyValue = errorValue.GetProperty(descriptionPropertyId);
localDescription = descriptionPropertyValue.ConvertToString().ToString();
if (!string.IsNullOrWhiteSpace(localDescription))
{
description = localDescription;
}
}
if (type == JsErrorType.Syntax)
{
errorCode = JsErrorCode.ScriptCompile;
}
else
{
JsPropertyId numberPropertyId = JsPropertyId.FromString("number");
if (errorValue.HasProperty(numberPropertyId))
{
JsValue numberPropertyValue = errorValue.GetProperty(numberPropertyId);
int errorNumber = numberPropertyValue.ValueType == JsValueType.Number ?
numberPropertyValue.ToInt32() : 0;
errorCode = (JsErrorCode)errorNumber;
}
}
JsPropertyId urlPropertyId = JsPropertyId.FromString("url");
if (metadataValue.HasProperty(urlPropertyId))
{
JsValue urlPropertyValue = metadataValue.GetProperty(urlPropertyId);
string url = urlPropertyValue.ValueType == JsValueType.String ?
urlPropertyValue.ToString() : string.Empty;
if (url != "undefined")
{
documentName = url;
}
}
JsPropertyId linePropertyId = JsPropertyId.FromString("line");
if (metadataValue.HasProperty(linePropertyId))
{
JsValue linePropertyValue = metadataValue.GetProperty(linePropertyId);
lineNumber = linePropertyValue.ValueType == JsValueType.Number ?
linePropertyValue.ToInt32() + 1 : 0;
}
JsPropertyId columnPropertyId = JsPropertyId.FromString("column");
if (metadataValue.HasProperty(columnPropertyId))
{
JsValue columnPropertyValue = metadataValue.GetProperty(columnPropertyId);
columnNumber = columnPropertyValue.ValueType == JsValueType.Number ?
columnPropertyValue.ToInt32() + 1 : 0;
}
string sourceLine = string.Empty;
JsPropertyId sourcePropertyId = JsPropertyId.FromString("source");
if (metadataValue.HasProperty(sourcePropertyId))
{
JsValue sourcePropertyValue = metadataValue.GetProperty(sourcePropertyId);
sourceLine = sourcePropertyValue.ValueType == JsValueType.String ?
sourcePropertyValue.ToString() : string.Empty;
sourceFragment = TextHelpers.GetTextFragmentFromLine(sourceLine, columnNumber);
}
JsPropertyId stackPropertyId = JsPropertyId.FromString("stack");
if (errorValue.HasProperty(stackPropertyId))
{
JsValue stackPropertyValue = errorValue.GetProperty(stackPropertyId);
string messageWithTypeAndCallStack = stackPropertyValue.ValueType == JsValueType.String ?
stackPropertyValue.ToString() : string.Empty;
string messageWithType = errorValue.ConvertToString().ToString();
string rawCallStack = messageWithTypeAndCallStack
.TrimStart(messageWithType)
.TrimStart("Error")
.TrimStart(new char[] { '\n', '\r' })
;
string callStackWithSourceFragment = string.Empty;
ErrorLocationItem[] callStackItems = CoreErrorHelpers.ParseErrorLocation(rawCallStack);
if (callStackItems.Length > 0)
{
ErrorLocationItem firstCallStackItem = callStackItems[0];
firstCallStackItem.SourceFragment = sourceFragment;
documentName = firstCallStackItem.DocumentName;
lineNumber = firstCallStackItem.LineNumber;
columnNumber = firstCallStackItem.ColumnNumber;
callStack = CoreErrorHelpers.StringifyErrorLocationItems(callStackItems, true);
callStackWithSourceFragment = CoreErrorHelpers.StringifyErrorLocationItems(callStackItems);
}
message = CoreErrorHelpers.GenerateScriptErrorMessage(type, description,
callStackWithSourceFragment);
}
else
{
message = CoreErrorHelpers.GenerateScriptErrorMessage(type, description, documentName,
lineNumber, columnNumber, sourceFragment);
}
}
else if (errorValueType == JsValueType.String)
{
message = errorValue.ToString();
description = message;
}
else
{
message = errorValue.ConvertToString().ToString();
description = message;
}
}
WrapperScriptException wrapperScriptException;
if (errorCode == JsErrorCode.ScriptCompile)
{
wrapperScriptException = new WrapperCompilationException(message, EngineName, EngineVersion,
originalScriptException);
}
else if (errorCode == JsErrorCode.ScriptTerminated)
{
message = CoreStrings.Runtime_ScriptInterrupted;
description = message;
wrapperScriptException = new WrapperInterruptedException(message,
EngineName, EngineVersion, originalScriptException)
{
CallStack = callStack
};
}
else
{
wrapperScriptException = new WrapperRuntimeException(message, EngineName, EngineVersion,
originalScriptException)
{
CallStack = callStack
};
}
wrapperScriptException.Type = type;
wrapperScriptException.DocumentName = documentName;
wrapperScriptException.LineNumber = lineNumber;
wrapperScriptException.ColumnNumber = columnNumber;
wrapperScriptException.SourceFragment = sourceFragment;
wrapperException = wrapperScriptException;
}
else
{
if (originalException is OriginalUsageException)
{
wrapperException = new WrapperUsageException(message, EngineName, EngineVersion,
originalException);
}
else if (originalException is OriginalEngineException)
{
wrapperException = new WrapperEngineException(message, EngineName, EngineVersion,
originalException);
}
else if (originalException is OriginalFatalException)
{
wrapperException = new WrapperFatalException(message, EngineName, EngineVersion,
originalException);
}
else
{
wrapperException = new WrapperException(message, EngineName, EngineVersion,
originalException);
}
}
wrapperException.Description = description;
return(wrapperException);
}
protected override object InnerCallFunction(string functionName, params object[] args)
{
object result = _dispatcher.Invoke(() =>
{
using (new JsScope(_jsContext))
{
try
{
JsValue globalObj = JsValue.GlobalObject;
JsPropertyId functionId = JsPropertyId.FromString(functionName);
bool functionExist = globalObj.HasProperty(functionId);
if (!functionExist)
{
throw new WrapperRuntimeException(
string.Format(CoreStrings.Runtime_FunctionNotExist, functionName),
EngineName, EngineVersion
);
}
JsValue resultValue;
JsValue functionValue = globalObj.GetProperty(functionId);
int argCount = args.Length;
if (argCount > 0)
{
int processedArgCount = argCount + 1;
var processedArgs = new JsValue[processedArgCount];
processedArgs[0] = globalObj;
for (int argIndex = 0; argIndex < argCount; argIndex++)
{
JsValue processedArg = _typeMapper.MapToScriptType(args[argIndex]);
AddReferenceToValue(processedArg);
processedArgs[argIndex + 1] = processedArg;
}
try
{
resultValue = functionValue.CallFunction(processedArgs);
}
finally
{
for (int argIndex = 1; argIndex < processedArgCount; argIndex++)
{
RemoveReferenceToValue(processedArgs[argIndex]);
}
}
}
else
{
resultValue = functionValue.CallFunction(globalObj);
}
return(_typeMapper.MapToHostType(resultValue));
}
catch (OriginalException e)
{
throw WrapJsException(e);
}
}
});
return(result);
}
static void Main(string[] args)
{
using (JsRuntime runtime = JsRuntime.Create())
{
JsContext context = runtime.CreateContext();
context.AddRef();
JsSourceContext sourceContext = JsSourceContext.FromIntPtr(IntPtr.Zero);
var moduleManager = new EsModuleManager(() => sourceContext++);
var scope = new JsScope(context);
try
{
JsValue moduleNamespace;
// It's not working. Always returns a result equal to `undefined`.
JsValue resultValue = moduleManager.EvaluateModuleCode(
@"import * as geometry from './geometry/geometry.js';
new geometry.Square(15).area;",
"Files/main-with-return-value.js",
out moduleNamespace
);
WriteLine("Return value: {0}", resultValue.ConvertToString().ToString());
// It's works. We can return the result value by using the default export.
moduleManager.EvaluateModuleCode(
@"import * as geometry from './geometry/geometry.js';
export default new geometry.Square(20).area;",
"Files/main-with-default-export.js",
out moduleNamespace
);
JsPropertyId defaultPropertyId = JsPropertyId.FromString("default");
JsValue defaultPropertyValue = moduleNamespace.GetProperty(defaultPropertyId);
WriteLine("Default export: {0}", defaultPropertyValue.ConvertToString().ToString());
// It's works. We can return the result value by using the named export.
moduleManager.EvaluateModuleCode(
@"import * as geometry from './geometry/geometry.js';
export let squareArea = new geometry.Square(25).area;",
"Files/main-with-named-export.js",
out moduleNamespace
);
JsPropertyId squareAreaPropertyId = JsPropertyId.FromString("squareArea");
JsValue squareAreaPropertyValue = moduleNamespace.GetProperty(squareAreaPropertyId);
WriteLine("Named export: {0}", squareAreaPropertyValue.ConvertToString().ToString());
}
catch (JsException e)
{
WriteLine("During working of JavaScript engine an error occurred.");
WriteLine();
Write(e.Message);
var scriptException = e as JsScriptException;
if (scriptException != null)
{
WriteLine();
JsValue errorValue = scriptException.Metadata.GetProperty("exception");
JsValueType errorValueType = errorValue.ValueType;
if (errorValueType == JsValueType.Error || errorValueType == JsValueType.Object)
{
JsValue messageValue;
JsPropertyId stackPropertyId = JsPropertyId.FromString("stack");
if (errorValue.HasProperty(stackPropertyId))
{
messageValue = errorValue.GetProperty(stackPropertyId);
}
else
{
messageValue = errorValue.GetProperty("message");
}
WriteLine(messageValue.ToString());
}
else if (errorValueType == JsValueType.String)
{
WriteLine(errorValue.ToString());
}
else
{
WriteLine(errorValue.ConvertToString().ToString());
}
}
}
finally
{
scope.Dispose();
moduleManager?.Dispose();
context.Release();
}
}
}
private static JsRuntimeException ConvertJsExceptionToJsRuntimeException(
OriginalJsException jsException)
{
string message = jsException.Message;
string category = string.Empty;
int lineNumber = 0;
int columnNumber = 0;
string sourceFragment = string.Empty;
var jsScriptException = jsException as JsScriptException;
if (jsScriptException != null)
{
category = "Script error";
JsValue errorValue = jsScriptException.Error;
JsPropertyId stackPropertyId = JsPropertyId.FromString("stack");
if (errorValue.HasProperty(stackPropertyId))
{
JsValue stackPropertyValue = errorValue.GetProperty(stackPropertyId);
message = stackPropertyValue.ConvertToString().ToString();
}
else
{
JsValue messagePropertyValue = errorValue.GetProperty("message");
string scriptMessage = messagePropertyValue.ConvertToString().ToString();
if (!string.IsNullOrWhiteSpace(scriptMessage))
{
message = string.Format("{0}: {1}", message.TrimEnd('.'), scriptMessage);
}
}
JsPropertyId linePropertyId = JsPropertyId.FromString("line");
if (errorValue.HasProperty(linePropertyId))
{
JsValue linePropertyValue = errorValue.GetProperty(linePropertyId);
lineNumber = linePropertyValue.ConvertToNumber().ToInt32() + 1;
}
JsPropertyId columnPropertyId = JsPropertyId.FromString("column");
if (errorValue.HasProperty(columnPropertyId))
{
JsValue columnPropertyValue = errorValue.GetProperty(columnPropertyId);
columnNumber = columnPropertyValue.ConvertToNumber().ToInt32() + 1;
}
if (lineNumber <= 0 && columnNumber <= 0)
{
Match errorStringMatch = _errorStringRegex.Match(message);
if (errorStringMatch.Success)
{
GroupCollection errorStringGroups = errorStringMatch.Groups;
lineNumber = int.Parse(errorStringGroups["lineNumber"].Value);
columnNumber = int.Parse(errorStringGroups["columnNumber"].Value);
}
}
JsPropertyId sourcePropertyId = JsPropertyId.FromString("source");
if (errorValue.HasProperty(sourcePropertyId))
{
JsValue sourcePropertyValue = errorValue.GetProperty(sourcePropertyId);
sourceFragment = sourcePropertyValue.ConvertToString().ToString();
}
}
else if (jsException is JsUsageException)
{
category = "Usage error";
}
else if (jsException is JsEngineException)
{
category = "Engine error";
}
else if (jsException is JsFatalException)
{
category = "Fatal error";
}
var jsEngineException = new JsRuntimeException(message, EngineName, EngineVersion)
{
ErrorCode = ((uint)jsException.ErrorCode).ToString(CultureInfo.InvariantCulture),
Category = category,
LineNumber = lineNumber,
ColumnNumber = columnNumber,
SourceFragment = sourceFragment
};
return(jsEngineException);
}
