public bool ToBoolean(JavaScriptValue value)
{
if (value == null)
throw new ArgumentNullException(nameof(value));
var eng = GetEngineAndClaimContext();
bool result;
if (value.Type == JavaScriptValueType.Boolean)
{
Errors.ThrowIfIs(api_.JsBooleanToBool(value.handle_, out result));
}
else
{
JavaScriptValueSafeHandle tempBool;
Errors.ThrowIfIs(api_.JsConvertValueToBoolean(value.handle_, out tempBool));
using (tempBool)
{
Errors.ThrowIfIs(api_.JsBooleanToBool(tempBool, out result));
}
}
return result;
}
public double ToDouble(JavaScriptValue value)
{
if (value == null)
throw new ArgumentNullException(nameof(value));
var eng = GetEngineAndClaimContext();
double result;
if (value.Type == JavaScriptValueType.Number)
{
Errors.ThrowIfIs(api_.JsNumberToDouble(value.handle_, out result));
}
else
{
JavaScriptValueSafeHandle tempVal;
Errors.ThrowIfIs(api_.JsConvertValueToNumber(value.handle_, out tempVal));
using (tempVal)
{
Errors.ThrowIfIs(api_.JsNumberToDouble(tempVal, out result));
}
}
return result;
}
public bool SimpleEquals(JavaScriptValue other)
{
var eng = GetEngineAndClaimContext();
bool result;
Errors.ThrowIfIs(api_.JsEquals(this.handle_, other.handle_, out result));
return result;
}
public bool StrictEquals(JavaScriptValue other)
{
var eng = GetEngine();
bool result;
Errors.ThrowIfIs(api_.JsStrictEquals(this.handle_, other.handle_, out result));
return result;
}
static JavaScriptValue Echo(JavaScriptEngine engine, bool construct, JavaScriptValue thisValue, IEnumerable<JavaScriptValue> arguments)
{
Console.WriteLine(arguments.First().ToString(), (object[])arguments.Skip(1).ToArray());
return engine.UndefinedValue;
}
// todo: replace with a dynamic method thunk
private MethodInfo GetBestFitMethod(IEnumerable<MethodInfo> methodCandidates, JavaScriptValue thisObj, JavaScriptValue[] argsArray)
{
JavaScriptObject @this = thisObj as JavaScriptObject;
if (@this == null)
return null;
var external = @this.ExternalObject;
if (external == null)
return null;
MethodInfo most = null;
int arity = -1;
foreach (var candidate in methodCandidates)
{
//if (candidate.DeclaringType != external.GetType())
// continue;
var paramCount = candidate.GetParameters().Length;
if (argsArray.Length == paramCount)
{
return candidate;
}
else if (argsArray.Length < paramCount)
{
if (paramCount > arity)
{
arity = paramCount;
most = candidate;
}
}
}
return most;
}
public void DeleteValueAtIndex(JavaScriptValue index)
{
if (index == null)
throw new ArgumentNullException(nameof(index));
GetEngineAndClaimContext(); // unused but the call is needed to claim the context
Errors.ThrowIfIs(api_.JsDeleteIndexedProperty(handle_, index.handle_));
}
public unsafe string ToString(JavaScriptValue value)
{
if (value == null)
throw new ArgumentNullException(nameof(value));
var eng = GetEngineAndClaimContext();
if (value.Type == JavaScriptValueType.String)
{
void* str;
uint len;
Errors.ThrowIfIs(api_.JsStringToPointer(value.handle_, out str, out len));
if (len > int.MaxValue)
throw new OutOfMemoryException("Exceeded maximum string length.");
return Marshal.PtrToStringUni(new IntPtr(str), unchecked((int)len));
}
else if (value.Type == JavaScriptValueType.Symbol)
{
// Presently, JsRT doesn't have a way for the host to query the description of a Symbol
// Using JsConvertValueToString resulted in putting the runtime into an exception state
// Thus, detect the condition and just return a known string.
return "(Symbol)";
}
else
{
JavaScriptValueSafeHandle tempStr;
Errors.ThrowIfIs(api_.JsConvertValueToString(value.handle_, out tempStr));
using (tempStr)
{
void* str;
uint len;
Errors.ThrowIfIs(api_.JsStringToPointer(tempStr, out str, out len));
if (len > int.MaxValue)
throw new OutOfMemoryException("Exceeded maximum string length.");
return Marshal.PtrToStringUni(new IntPtr(str), unchecked((int)len));
}
}
}
public object ToObject(JavaScriptValue val)
{
switch (val.Type)
{
case JavaScriptValueType.Boolean:
return val.IsTruthy;
case JavaScriptValueType.Number:
return ToDouble(val);
case JavaScriptValueType.String:
return ToString(val);
case JavaScriptValueType.Undefined:
return null;
case JavaScriptValueType.Array:
JavaScriptArray arr = val as JavaScriptArray;
Debug.Assert(arr != null);
return arr.Select(v => ToObject(v)).ToArray();
case JavaScriptValueType.ArrayBuffer:
var ab = val as JavaScriptArrayBuffer;
Debug.Assert(ab != null);
return ab.GetUnderlyingMemory();
case JavaScriptValueType.DataView:
var dv = val as JavaScriptDataView;
Debug.Assert(dv != null);
return dv.GetUnderlyingMemory();
case JavaScriptValueType.TypedArray:
var ta = val as JavaScriptTypedArray;
Debug.Assert(ta != null);
return ta.GetUnderlyingMemory();
case JavaScriptValueType.Object:
var obj = val as JavaScriptObject;
var external = obj.ExternalObject;
return external ?? obj;
// Unsupported marshaling types
case JavaScriptValueType.Function:
case JavaScriptValueType.Date:
case JavaScriptValueType.Symbol:
default:
throw new NotSupportedException("Unsupported type marshaling value from JavaScript to host: " + val.Type);
}
}
public void SetGlobalVariable(string name, JavaScriptValue value)
{
if (value == null)
throw new ArgumentNullException(nameof(value));
GlobalObject.SetPropertyByName(name, value);
}
public void SetException(JavaScriptValue exception)
{
if (exception == null)
throw new ArgumentNullException(nameof(exception));
ClaimContext();
Errors.ThrowIfIs(api_.JsSetException(exception.handle_));
}
public JavaScriptValue this[JavaScriptValue index]
{
get
{
return GetValueAtIndex(index);
}
set
{
SetValueAtIndex(index, value);
}
}
// todo: replace with a dynamic method thunk
private MethodInfo GetBestFitMethod(IEnumerable <MethodInfo> methodCandidates, JavaScriptValue thisObj, JavaScriptValue[] argsArray)
{
JavaScriptObject @this = thisObj as JavaScriptObject;
if (@this == null)
{
return(null);
}
var external = @this.ExternalObject;
if (external == null)
{
return(null);
}
MethodInfo most = null;
int arity = -1;
foreach (var candidate in methodCandidates)
{
//if (candidate.DeclaringType != external.GetType())
// continue;
var paramCount = candidate.GetParameters().Length;
if (argsArray.Length == paramCount)
{
return(candidate);
}
else if (argsArray.Length < paramCount)
{
if (paramCount > arity)
{
arity = paramCount;
most = candidate;
}
}
}
return(most);
}
public void DeleteValueAtIndex(JavaScriptValue index)
{
if (index == null)
throw new ArgumentNullException(nameof(index));
Errors.ThrowIfIs(api_.JsDeleteIndexedProperty(handle_, index.handle_));
}
public void SetValueAtIndex(JavaScriptValue index, JavaScriptValue value)
{
if (index == null)
throw new ArgumentNullException(nameof(index));
var eng = GetEngine();
if (value == null)
value = eng.NullValue;
Errors.ThrowIfIs(api_.JsSetIndexedProperty(handle_, index.handle_, value.handle_));
}
public JavaScriptValue GetValueAtIndex(JavaScriptValue index)
{
if (index == null)
throw new ArgumentNullException(nameof(index));
var eng = GetEngine();
JavaScriptValueSafeHandle result;
Errors.ThrowIfIs(api_.JsGetIndexedProperty(handle_, index.handle_, out result));
return eng.CreateValueFromHandle(result);
}
public void SetPropertyBySymbol(JavaScriptSymbol symbol, JavaScriptValue value)
{
var eng = GetEngine();
IntPtr propId;
Errors.ThrowIfIs(api_.JsGetPropertyIdFromSymbol(symbol.handle_, out propId));
Errors.ThrowIfIs(api_.JsSetProperty(handle_, propId, value.handle_, false));
}
public void SetPropertyByName(string propertyName, JavaScriptValue value)
{
var eng = GetEngine();
IntPtr propId;
Errors.ThrowIfIs(api_.JsGetPropertyIdFromName(propertyName, out propId));
Errors.ThrowIfIs(api_.JsSetProperty(handle_, propId, value.handle_, false));
}
