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V8ProxyHelpers.cs
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261 lines (206 loc) · 8.37 KB
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using Microsoft.ClearScript.Util;
namespace Microsoft.ClearScript.V8
{
internal static class V8ProxyHelpers
{
#region host object lifetime
public static IntPtr AddRefHostObject(IntPtr pObject)
{
return AddRefHostObject(GetHostObject(pObject));
}
public static IntPtr AddRefHostObject(object obj)
{
return GCHandle.ToIntPtr(GCHandle.Alloc(obj));
}
public static void ReleaseHostObject(IntPtr pObject)
{
GCHandle.FromIntPtr(pObject).Free();
}
public static IScope<IntPtr> CreateAddRefHostObjectScope(object obj)
{
return Scope.Create(() => AddRefHostObject(obj), ReleaseHostObject);
}
#endregion
#region host object access
public static object GetHostObject(IntPtr pObject)
{
return GCHandle.FromIntPtr(pObject).Target;
}
public static T GetHostObject<T>(IntPtr pObject) where T : class
{
return (T)GetHostObject(pObject);
}
public static object GetHostObjectProperty(IntPtr pObject, string name)
{
return GetHostObjectProperty(GetHostObject(pObject), name);
}
public static object GetHostObjectProperty(object obj, string name)
{
return ((IDynamic)obj).GetProperty(name);
}
public static object GetHostObjectProperty(IntPtr pObject, string name, out bool isCacheable)
{
return GetHostObjectProperty(GetHostObject(pObject), name, out isCacheable);
}
public static object GetHostObjectProperty(object obj, string name, out bool isCacheable)
{
return ((IDynamic)obj).GetProperty(name, out isCacheable);
}
public static void SetHostObjectProperty(IntPtr pObject, string name, object value)
{
SetHostObjectProperty(GetHostObject(pObject), name, value);
}
public static void SetHostObjectProperty(object obj, string name, object value)
{
((IDynamic)obj).SetProperty(name, value);
}
public static bool DeleteHostObjectProperty(IntPtr pObject, string name)
{
return DeleteHostObjectProperty(GetHostObject(pObject), name);
}
public static bool DeleteHostObjectProperty(object obj, string name)
{
return ((IDynamic)obj).DeleteProperty(name);
}
public static string[] GetHostObjectPropertyNames(IntPtr pObject)
{
return GetHostObjectPropertyNames(GetHostObject(pObject));
}
public static string[] GetHostObjectPropertyNames(object obj)
{
return ((IDynamic)obj).GetPropertyNames();
}
public static object GetHostObjectProperty(IntPtr pObject, int index)
{
return GetHostObjectProperty(GetHostObject(pObject), index);
}
public static object GetHostObjectProperty(object obj, int index)
{
return ((IDynamic)obj).GetProperty(index);
}
public static void SetHostObjectProperty(IntPtr pObject, int index, object value)
{
SetHostObjectProperty(GetHostObject(pObject), index, value);
}
public static void SetHostObjectProperty(object obj, int index, object value)
{
((IDynamic)obj).SetProperty(index, value);
}
public static bool DeleteHostObjectProperty(IntPtr pObject, int index)
{
return DeleteHostObjectProperty(GetHostObject(pObject), index);
}
public static bool DeleteHostObjectProperty(object obj, int index)
{
return ((IDynamic)obj).DeleteProperty(index);
}
public static int[] GetHostObjectPropertyIndices(IntPtr pObject)
{
return GetHostObjectPropertyIndices(GetHostObject(pObject));
}
public static int[] GetHostObjectPropertyIndices(object obj)
{
return ((IDynamic)obj).GetPropertyIndices();
}
public static object InvokeHostObject(IntPtr pObject, bool asConstructor, object[] args)
{
return InvokeHostObject(GetHostObject(pObject), asConstructor, args);
}
public static object InvokeHostObject(object obj, bool asConstructor, object[] args)
{
return ((IDynamic)obj).Invoke(asConstructor, args);
}
public static object InvokeHostObjectMethod(IntPtr pObject, string name, object[] args)
{
return InvokeHostObjectMethod(GetHostObject(pObject), name, args);
}
public static object InvokeHostObjectMethod(object obj, string name, object[] args)
{
return ((IDynamic)obj).InvokeMethod(name, args);
}
public static Invocability GetHostObjectInvocability(IntPtr pObject)
{
return GetHostObjectInvocability(GetHostObject(pObject));
}
public static Invocability GetHostObjectInvocability(object obj)
{
var hostItem = obj as HostItem;
if (hostItem == null)
{
return Invocability.None;
}
return hostItem.Invocability;
}
public static object GetHostObjectEnumerator(IntPtr pObject)
{
return GetHostObjectEnumerator(GetHostObject(pObject));
}
public static object GetHostObjectEnumerator(object obj)
{
return ((IDynamic)obj).GetProperty(SpecialMemberNames.NewEnum);
}
public static object GetHostObjectAsyncEnumerator(IntPtr pObject)
{
return GetHostObjectAsyncEnumerator(GetHostObject(pObject));
}
public static object GetHostObjectAsyncEnumerator(object obj)
{
return ((IDynamic)obj).GetProperty(SpecialMemberNames.NewAsyncEnum);
}
#endregion
#region exception marshaling
public static object MarshalExceptionToScript(IntPtr pSource, Exception exception)
{
return MarshalExceptionToScript(GetHostObject(pSource), exception);
}
public static object MarshalExceptionToScript(object source, Exception exception)
{
return ((IScriptMarshalWrapper)source).Engine.MarshalToScript(exception);
}
public static Exception MarshalExceptionToHost(object exception)
{
return (Exception)((IScriptMarshalWrapper)exception)?.Engine.MarshalToHost(exception, false);
}
#endregion
#region module support
public static string LoadModule(IntPtr pSourceDocumentInfo, string specifier, DocumentCategory category, out UniqueDocumentInfo documentInfo)
{
var engine = ScriptEngine.Current;
if (engine == null)
{
throw new InvalidOperationException("Module loading requires a script engine");
}
var settings = engine.DocumentSettings;
var document = settings.LoadDocument(((UniqueDocumentInfo)GetHostObject(pSourceDocumentInfo)).Info, specifier, category, null);
var code = document.GetTextContents();
documentInfo = document.Info.MakeUnique(engine);
return code;
}
public static IDictionary<string, object> CreateModuleContext(IntPtr pDocumentInfo)
{
var engine = ScriptEngine.Current;
if (engine == null)
{
throw new InvalidOperationException("Module context construction requires a script engine");
}
var documentInfo = (UniqueDocumentInfo)GetHostObject(pDocumentInfo);
var callback = documentInfo.ContextCallback ?? engine.DocumentSettings.ContextCallback;
if ((callback != null) && MiscHelpers.Try(out var sharedContext, () => callback(documentInfo.Info)) && (sharedContext != null))
{
var context = new Dictionary<string, object>(sharedContext.Count);
foreach (var pair in sharedContext)
{
context.Add(pair.Key, engine.MarshalToScript(pair.Value));
}
return context;
}
return null;
}
#endregion
}
}