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HostObject.cs
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72 lines (59 loc) · 1.92 KB
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#if !NETSTANDARD1_3
using System;
using System.Globalization;
using System.Linq;
using System.Reflection;
using MsieJavaScriptEngine.Constants;
using MsieJavaScriptEngine.Helpers;
namespace MsieJavaScriptEngine
{
/// <summary>
/// Wrapper for object, that implements <see cref="IReflect"/> interface
/// </summary>
internal sealed class HostObject : HostItemBase
{
/// <summary>
/// Constructs an instance of the wrapper for object, that implements <see cref="IReflect"/> interface
/// </summary>
/// <param name="target">Target object</param>
/// <param name="engineMode">JavaScript engine mode</param>
public HostObject(object target, JsEngineMode engineMode)
: base(target.GetType(), target, engineMode, true)
{ }
private object InvokeDelegate(Delegate del, object[] args)
{
if (del == null)
{
throw new ArgumentNullException("del");
}
object[] processedArgs = args;
if (_engineMode == JsEngineMode.Classic && processedArgs.Length > 0)
{
processedArgs = processedArgs.Skip(1).ToArray();
}
object result = del.DynamicInvoke(processedArgs);
return result;
}
#region HostItemBase implementation
protected override object InnerInvokeMember(string name, BindingFlags invokeAttr, Binder binder, object target,
object[] args, ParameterModifier[] modifiers, CultureInfo culture, string[] namedParameters)
{
object result;
object processedTarget = TypeMappingHelpers.MapToHostType(target);
object[] processedArgs = TypeMappingHelpers.MapToHostType(args);
if (name == SpecialMemberName.Default && processedTarget is Delegate)
{
var del = (Delegate)processedTarget;
result = InvokeDelegate(del, processedArgs);
}
else
{
result = InvokeStandardMember(name, invokeAttr, binder, processedTarget,
processedArgs, modifiers, culture, namedParameters);
}
return TypeMappingHelpers.MapToScriptType(result, _engineMode);
}
#endregion
}
}
#endif