private JsValue CreateFunctionFromDelegate(Delegate value)
{
JsNativeFunction nativeFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
object[] processedArgs = MapToHostType(args.Skip(1).ToArray());
ParameterInfo[] parameters = value.GetMethodInfo().GetParameters();
JsValue undefinedValue = JsValue.Undefined;
ReflectionHelpers.FixArgumentTypes(ref processedArgs, parameters);
object result;
try
{
result = value.DynamicInvoke(processedArgs);
}
catch (Exception e)
{
JsValue errorValue = JsErrorHelpers.CreateError(
string.Format(Strings.Runtime_HostDelegateInvocationFailed, e.Message));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
_nativeFunctions.Add(nativeFunction);
JsValue functionValue = JsValue.CreateFunction(nativeFunction);
return(functionValue);
}
public static Task DeclareFunctionAsync(this JsContext context, string name, Func <object> func)
{
return(context.RequestScopeAsync(session => session.Global.SetProperty(name, JsValue.CreateFunction(() => JsValue.FromObject(func())))));
}
public static Task DeclareFunctionAsync(this JsContext context, string name, Action action)
{
return(context.RequestScopeAsync(session => session.Global.SetProperty(name, JsValue.CreateFunction(action))));
}
private void ProjectProperties(EmbeddedItem externalItem, EmbeddingObjectOptions options)
{
Type type = externalItem.HostType;
object obj = externalItem.HostObject;
JsValue typeValue = externalItem.ScriptValue;
IList <JsNativeFunction> nativeFunctions = externalItem.NativeFunctions;
bool instance = externalItem.IsInstance;
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
PropertyInfo[] properties = type.GetProperties(defaultBindingFlags).Where(options.IsMapped).ToArray();
foreach (PropertyInfo property in properties)
{
string propertyName = property.Name;
JsValue descriptorValue = JsValue.CreateObject();
descriptorValue.SetProperty("enumerable", JsValue.True, true);
if (property.GetGetMethod() != null)
{
JsValue nativeGetFunction(JsValue callee, bool isConstructCall, JsValue[] args, ushort argCount, IntPtr callbackData)
{
if (instance && obj == null)
{
CreateAndSetError($"Invalid context for '{propertyName}' property.");
return(JsValue.Undefined);
}
object result;
try
{
result = property.GetValue(obj, new object[0]);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as JsException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
$"Property '{propertyName}' get operation failed: {exception.Message}"
:
$"Property '{propertyName}' of static type '{typeName}' get operation failed: {exception.Message}"
;
errorValue = JsValue.CreateError(JsValue.FromString(errorMessage));
}
JsContext.SetException(errorValue);
return(JsValue.Undefined);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
}
nativeFunctions.Add(nativeGetFunction);
JsValue getMethodValue = JsValue.CreateFunction(nativeGetFunction);
descriptorValue.SetProperty("get", getMethodValue, true);
}
if (property.GetSetMethod() != null)
{
JsValue nativeSetFunction(JsValue callee, bool isConstructCall, JsValue[] args, ushort argCount, IntPtr callbackData)
{
JsValue undefinedValue = JsValue.Undefined;
if (instance && obj == null)
{
CreateAndSetError($"Invalid context for '{propertyName}' property.");
return(undefinedValue);
}
object value = MapToHostType(args[1]);
ReflectionHelpers.FixPropertyValueType(ref value, property);
try
{
property.SetValue(obj, value, new object[0]);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as JsException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
$"Host object property '{propertyName}' setting failed: {exception.Message}"
:
$"Host type '{typeName}' property '{propertyName}' setting failed: {exception.Message}"
;
errorValue = JsValue.CreateError(JsValue.FromString(errorMessage));
}
JsContext.SetException(errorValue);
return(undefinedValue);
}
return(undefinedValue);
}
nativeFunctions.Add(nativeSetFunction);
JsValue setMethodValue = JsValue.CreateFunction(nativeSetFunction);
descriptorValue.SetProperty("set", setMethodValue, true);
}
typeValue.DefineProperty(propertyName, descriptorValue);
}
}
private void ProjectFields(EmbeddedItem externalItem, EmbeddingObjectOptions options)
{
Type type = externalItem.HostType;
object obj = externalItem.HostObject;
JsValue typeValue = externalItem.ScriptValue;
bool instance = externalItem.IsInstance;
IList <JsNativeFunction> nativeFunctions = externalItem.NativeFunctions;
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
FieldInfo[] fields = type.GetFields(defaultBindingFlags).Where(options.IsMapped).ToArray();
foreach (FieldInfo field in fields)
{
string fieldName = field.Name;
JsValue descriptorValue = JsValue.CreateObject();
descriptorValue.SetProperty("enumerable", JsValue.True, true);
JsNativeFunction nativeGetFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
if (instance && obj == null)
{
CreateAndSetError($"Context error while invoking getter '{fieldName}'.");
return(JsValue.Undefined);
}
object result;
try
{
result = field.GetValue(obj);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as JsException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
$"Error ocured while reading field '{fieldName}': {exception.Message}"
:
$"Erorr ocured while reading static field '{fieldName}' from type '{typeName}': {exception.Message}"
;
errorValue = JsValue.CreateError(JsValue.FromString(errorMessage));
}
JsContext.SetException(errorValue);
return(JsValue.Undefined);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
nativeFunctions.Add(nativeGetFunction);
JsValue getMethodValue = JsValue.CreateFunction(nativeGetFunction);
descriptorValue.SetProperty("get", getMethodValue, true);
JsNativeFunction nativeSetFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
if (instance && obj == null)
{
CreateAndSetError($"Invalid context got host object field {fieldName}.");
return(JsValue.Undefined);
}
object value = MapToHostType(args[1]);
ReflectionHelpers.FixFieldValueType(ref value, field);
try
{
field.SetValue(obj, value);
}
catch (Exception e)
{
Exception exception = UnwrapException(e);
var wrapperException = exception as JsException;
JsValue errorValue;
if (wrapperException != null)
{
errorValue = CreateErrorFromWrapperException(wrapperException);
}
else
{
string errorMessage = instance ?
$"Failed to set value for hosts object field '{fieldName}': {exception.Message}"
:
$"Failed to set value for static type '{typeName}' field '{fieldName}': {exception.Message}"
;
errorValue = JsValue.CreateError(JsValue.FromString(errorMessage));
}
JsContext.SetException(errorValue);
return(JsValue.Undefined);
}
return(JsValue.Undefined);
};
nativeFunctions.Add(nativeSetFunction);
JsValue setMethodValue = JsValue.CreateFunction(nativeSetFunction);
descriptorValue.SetProperty("set", setMethodValue, true);
typeValue.DefineProperty(fieldName, descriptorValue);
}
}
private void ProjectMethods(JsValue target, Type type, bool instance)
{
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
MethodInfo[] methods = type.GetMethods(defaultBindingFlags);
IEnumerable <IGrouping <string, MethodInfo> > methodGroups = methods.GroupBy(m => m.Name);
foreach (IGrouping <string, MethodInfo> methodGroup in methodGroups)
{
string methodName = methodGroup.Key;
MethodInfo[] methodCandidates = methodGroup.ToArray();
JsNativeFunction nativeFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
JsValue thisValue = args[0];
JsValue undefinedValue = JsValue.Undefined;
object thisObj = null;
if (instance)
{
if (!thisValue.HasExternalData)
{
JsValue errorValue = JsErrorHelpers.CreateTypeError(
string.Format(Strings.Runtime_InvalidThisContextForHostObjectMethod, methodName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
thisObj = MapToHostType(thisValue);
}
object[] processedArgs = MapToHostType(args.Skip(1).ToArray());
var bestFitMethod = (MethodInfo)ReflectionHelpers.GetBestFitMethod(
methodCandidates, processedArgs);
if (bestFitMethod == null)
{
JsValue errorValue = JsErrorHelpers.CreateReferenceError(
string.Format(Strings.Runtime_SuitableMethodOfHostObjectNotFound, methodName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
ReflectionHelpers.FixArgumentTypes(ref processedArgs, bestFitMethod.GetParameters());
object result;
try
{
result = bestFitMethod.Invoke(thisObj, processedArgs);
}
catch (Exception e)
{
string errorMessage = instance ?
string.Format(
Strings.Runtime_HostObjectMethodInvocationFailed, methodName, e.Message)
:
string.Format(
Strings.Runtime_HostTypeMethodInvocationFailed, methodName, typeName, e.Message)
;
JsValue errorValue = JsErrorHelpers.CreateError(errorMessage);
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
_nativeFunctions.Add(nativeFunction);
JsValue methodValue = JsValue.CreateFunction(nativeFunction);
target.SetProperty(methodName, methodValue, true);
}
}
private void ProjectProperties(JsValue target, Type type, bool instance)
{
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(instance);
PropertyInfo[] properties = type.GetProperties(defaultBindingFlags);
foreach (PropertyInfo property in properties)
{
string propertyName = property.Name;
JsValue descriptorValue = JsValue.CreateObject();
descriptorValue.SetProperty("enumerable", JsValue.True, true);
if (property.GetGetMethod() != null)
{
JsNativeFunction nativeFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
JsValue thisValue = args[0];
JsValue undefinedValue = JsValue.Undefined;
object thisObj = null;
if (instance)
{
if (!thisValue.HasExternalData)
{
JsValue errorValue = JsErrorHelpers.CreateTypeError(
string.Format(Strings.Runtime_InvalidThisContextForHostObjectProperty, propertyName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
thisObj = MapToHostType(thisValue);
}
object result;
try
{
result = property.GetValue(thisObj, new object[0]);
}
catch (Exception e)
{
string errorMessage = instance ?
string.Format(
Strings.Runtime_HostObjectPropertyGettingFailed, propertyName, e.Message)
:
string.Format(
Strings.Runtime_HostTypePropertyGettingFailed, propertyName, typeName, e.Message)
;
JsValue errorValue = JsErrorHelpers.CreateError(errorMessage);
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
JsValue resultValue = MapToScriptType(result);
return(resultValue);
};
_nativeFunctions.Add(nativeFunction);
JsValue getMethodValue = JsValue.CreateFunction(nativeFunction);
descriptorValue.SetProperty("get", getMethodValue, true);
}
if (property.GetSetMethod() != null)
{
JsNativeFunction nativeFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
JsValue thisValue = args[0];
JsValue undefinedValue = JsValue.Undefined;
object thisObj = null;
if (instance)
{
if (!thisValue.HasExternalData)
{
JsValue errorValue = JsErrorHelpers.CreateTypeError(
string.Format(Strings.Runtime_InvalidThisContextForHostObjectProperty, propertyName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
thisObj = MapToHostType(thisValue);
}
object value = MapToHostType(args.Skip(1).First());
ReflectionHelpers.FixPropertyValueType(ref value, property);
try
{
property.SetValue(thisObj, value, new object[0]);
}
catch (Exception e)
{
string errorMessage = instance ?
string.Format(
Strings.Runtime_HostObjectPropertySettingFailed, propertyName, e.Message)
:
string.Format(
Strings.Runtime_HostTypePropertySettingFailed, propertyName, typeName, e.Message)
;
JsValue errorValue = JsErrorHelpers.CreateError(errorMessage);
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
return(undefinedValue);
};
_nativeFunctions.Add(nativeFunction);
JsValue setMethodValue = JsValue.CreateFunction(nativeFunction);
descriptorValue.SetProperty("set", setMethodValue, true);
}
target.DefineProperty(propertyName, descriptorValue);
}
}
private JsValue CreateConstructor(Type type)
{
TypeInfo typeInfo = type.GetTypeInfo();
string typeName = type.FullName;
BindingFlags defaultBindingFlags = ReflectionHelpers.GetDefaultBindingFlags(true);
ConstructorInfo[] constructors = type.GetConstructors(defaultBindingFlags);
JsNativeFunction nativeFunction = (callee, isConstructCall, args, argCount, callbackData) =>
{
JsValue resultValue;
JsValue undefinedValue = JsValue.Undefined;
object[] processedArgs = MapToHostType(args.Skip(1).ToArray());
object result;
if (processedArgs.Length == 0 && typeInfo.IsValueType)
{
result = Activator.CreateInstance(type);
resultValue = MapToScriptType(result);
return(resultValue);
}
if (constructors.Length == 0)
{
JsValue errorValue = JsErrorHelpers.CreateError(
string.Format(Strings.Runtime_HostTypeConstructorNotFound, typeName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
var bestFitConstructor = (ConstructorInfo)ReflectionHelpers.GetBestFitMethod(
constructors, processedArgs);
if (bestFitConstructor == null)
{
JsValue errorValue = JsErrorHelpers.CreateReferenceError(
string.Format(Strings.Runtime_SuitableConstructorOfHostTypeNotFound, typeName));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
ReflectionHelpers.FixArgumentTypes(ref processedArgs, bestFitConstructor.GetParameters());
try
{
result = bestFitConstructor.Invoke(processedArgs);
}
catch (Exception e)
{
JsValue errorValue = JsErrorHelpers.CreateError(
string.Format(Strings.Runtime_HostTypeConstructorInvocationFailed, typeName, e.Message));
JsErrorHelpers.SetException(errorValue);
return(undefinedValue);
}
resultValue = MapToScriptType(result);
return(resultValue);
};
_nativeFunctions.Add(nativeFunction);
JsValue constructorValue = JsValue.CreateFunction(nativeFunction);
return(constructorValue);
}
