internal static extern JavaScriptErrorCode JsRunScript(string script, JavaScriptSourceContext sourceContext, string sourceUrl, out JavaScriptValue result);
internal static extern JavaScriptErrorCode JsRunSerializedScript(string script, byte[] buffer, JavaScriptSourceContext sourceContext, string sourceUrl, out JavaScriptValue result);
/// <summary>
/// Runs a serialized script.
/// </summary>
/// <remarks>
/// Requires an active script context.
/// </remarks>
/// <param name="script">The source code of the serialized script.</param>
/// <param name="buffer">The serialized script.</param>
/// <param name="sourceContext">
/// A cookie identifying the script that can be used by script contexts that have debugging enabled.
/// </param>
/// <param name="sourceName">The location the script came from.</param>
/// <returns>The result of the script, if any.</returns>
public static JavaScriptValue RunScript(string script, byte[] buffer, JavaScriptSourceContext sourceContext, string sourceName)
{
JavaScriptValue result;
Native.ThrowIfError(Native.JsRunSerializedScript(script, buffer, sourceContext, sourceName, out result));
return result;
}
internal static extern JavaScriptErrorCode JsRunSerializedScriptWithCallback(JavaScriptSerializedScriptLoadSourceCallback scriptLoadCallback,
JavaScriptSerializedScriptUnloadCallback scriptUnloadCallback, byte[] buffer, JavaScriptSourceContext sourceContext, string sourceUrl, out JavaScriptValue result);
/// <summary>
/// Instantiates the <see cref="ChakraJavaScriptExecutor"/>.
/// </summary>
public ChakraJavaScriptExecutor()
{
_runtime = JavaScriptRuntime.Create();
_context = JavaScriptSourceContext.FromIntPtr(IntPtr.Zero);
InitializeChakra();
}
/// <summary>
/// Parses a script and returns a <c>Function</c> representing the script.
/// </summary>
/// <remarks>
/// Requires an active script context.
/// </remarks>
/// <param name="script">The script to parse.</param>
/// <param name="sourceContext">
/// A cookie identifying the script that can be used by script contexts that have debugging enabled.
/// </param>
/// <param name="sourceName">The location the script came from.</param>
/// <returns>A <c>Function</c> representing the script code.</returns>
public static JavaScriptValue ParseScript(string script, JavaScriptSourceContext sourceContext, string sourceName)
{
JavaScriptValue result;
Native.ThrowIfError(Native.JsParseScript(script, sourceContext, sourceName, out result));
return result;
}
public static extern JavaScriptErrorCode JsRunSerializedScriptWithCallback(JavaScriptSerializedScriptLoadSourceCallback scriptLoadCallback,
JavaScriptSerializedScriptUnloadCallback scriptUnloadCallback, byte[] buffer, JavaScriptSourceContext sourceContext, string sourceUrl, out JavaScriptValue result);
public static extern JavaScriptErrorCode JsParseModuleSource(JavaScriptModuleRecord moduel, JavaScriptSourceContext sourceContext, byte[] script, uint scriptLength, JavaScriptParseModuleSourceFlags flags, out JavaScriptValue parseException);
public static extern JavaScriptErrorCode JsRunScript(string script, JavaScriptSourceContext sourceContext, string sourceUrl, out JavaScriptValue result);
public static extern JavaScriptErrorCode JsRunSerializedScript(string script, byte[] buffer, JavaScriptSourceContext sourceContext, string sourceUrl, out JavaScriptValue result);
private void button2_Click(object sender, EventArgs e)
{
JavaScriptRuntime runtime;
JavaScriptContext context;
JavaScriptSourceContext currentSourceContext = JavaScriptSourceContext.FromIntPtr(IntPtr.Zero);
JavaScriptValue jsValue;
string szWelcomMessage;
string szWhoamI;
double nVersion;
bool bSuccess = false;
try
{
string script = System.IO.File.ReadAllText("C:/Temp/Script/Sample02.js");
runtime = JavaScriptRuntime.Create();
context = runtime.CreateContext();
JavaScriptContext.Current = context;
JavaScriptContext.RunScript(script, currentSourceContext++, "");
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWelcomMessage"));
szWelcomMessage = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWhoamI"));
szWhoamI = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("nVersion"));
nVersion = jsValue.ToDouble();
System.Diagnostics.Trace.WriteLine("szWelcomMessage = " + szWelcomMessage);
System.Diagnostics.Trace.WriteLine("szWhoamI = " + szWhoamI);
System.Diagnostics.Trace.WriteLine("nVersion = " + nVersion.ToString());
jsValue = JavaScriptValue.FromString("New_Sample02.js");
JavaScriptValue.GlobalObject.SetProperty(JavaScriptPropertyId.FromString("szWhoamI"), jsValue, true);
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWelcomMessage"));
szWelcomMessage = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWhoamI"));
szWhoamI = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("nVersion"));
nVersion = jsValue.ToDouble();
System.Diagnostics.Trace.WriteLine("szWelcomMessage = " + szWelcomMessage);
System.Diagnostics.Trace.WriteLine("szWhoamI = " + szWhoamI);
System.Diagnostics.Trace.WriteLine("nVersion = " + nVersion.ToString());
bSuccess = true;
}
finally
{
if (true == bSuccess)
{
System.Diagnostics.Trace.WriteLine("Success");
}
else
{
System.Diagnostics.Trace.WriteLine("Error");
}
}
}
private void button3_Click(object sender, EventArgs e)
{
JavaScriptRuntime runtime;
JavaScriptContext context;
JavaScriptSourceContext currentSourceContext = JavaScriptSourceContext.FromIntPtr(IntPtr.Zero);
JavaScriptValue jsValue;
string szWelcomMessage;
string szWhoamI;
JavaScriptValue returnValue;
JavaScriptValue myfunc_1;
JavaScriptValue myfunc_2;
JavaScriptValue myfunc_3;
JavaScriptValue myfunc_4;
bool bSuccess = false;
try
{
string script = System.IO.File.ReadAllText("C:/Temp/Script/Sample03.js");
runtime = JavaScriptRuntime.Create();
context = runtime.CreateContext();
JavaScriptContext.Current = context;
JavaScriptContext.RunScript(script, currentSourceContext++, "");
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWelcomMessage"));
szWelcomMessage = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWhoamI"));
szWhoamI = jsValue.ToString();
System.Diagnostics.Trace.WriteLine("szWelcomMessage = " + szWelcomMessage);
System.Diagnostics.Trace.WriteLine("szWhoamI = " + szWhoamI);
// myfunc_1
JavaScriptValue[] args1 = new JavaScriptValue[1] {
JavaScriptValue.FromString("self")
};
myfunc_1 = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("myfunc_1"));
myfunc_1.CallFunction(args1);
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWelcomMessage"));
szWelcomMessage = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWhoamI"));
szWhoamI = jsValue.ToString();
System.Diagnostics.Trace.WriteLine("szWelcomMessage = " + szWelcomMessage);
System.Diagnostics.Trace.WriteLine("szWhoamI = " + szWhoamI);
// myfunc_2
JavaScriptValue[] args2 = new JavaScriptValue[1] {
JavaScriptValue.GlobalObject
};
myfunc_2 = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("myfunc_2"));
returnValue = myfunc_2.CallFunction(args2);
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWelcomMessage"));
szWelcomMessage = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWhoamI"));
szWhoamI = jsValue.ToString();
System.Diagnostics.Trace.WriteLine("Return Value = " + returnValue.ToString());
System.Diagnostics.Trace.WriteLine("szWelcomMessage = " + szWelcomMessage);
System.Diagnostics.Trace.WriteLine("szWhoamI = " + szWhoamI);
// myfunc_3
JavaScriptValue[] args3 = new JavaScriptValue[2] {
JavaScriptValue.GlobalObject, JavaScriptValue.FromString("myfunc_3")
};
myfunc_3 = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("myfunc_3"));
returnValue = myfunc_3.CallFunction(args3);
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWelcomMessage"));
szWelcomMessage = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWhoamI"));
szWhoamI = jsValue.ToString();
System.Diagnostics.Trace.WriteLine("Return Value[0] = " + (returnValue.GetIndexedProperty(JavaScriptValue.FromInt32(0))).ToString());
System.Diagnostics.Trace.WriteLine("Return Value[1] = " + (returnValue.GetIndexedProperty(JavaScriptValue.FromInt32(1))).ToBoolean());
System.Diagnostics.Trace.WriteLine("szWelcomMessage = " + szWelcomMessage);
System.Diagnostics.Trace.WriteLine("szWhoamI = " + szWhoamI);
// myfunc_4
JavaScriptValue[] args4 = new JavaScriptValue[3] {
JavaScriptValue.GlobalObject, JavaScriptValue.FromString("myfunc_4"), JavaScriptValue.FromBoolean(false)
};
myfunc_4 = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("myfunc_4"));
returnValue = myfunc_4.CallFunction(args4);
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWelcomMessage"));
szWelcomMessage = jsValue.ToString();
jsValue = JavaScriptValue.GlobalObject.GetProperty(JavaScriptPropertyId.FromString("szWhoamI"));
szWhoamI = jsValue.ToString();
System.Diagnostics.Trace.WriteLine("Return Value[0] = " + (returnValue.GetIndexedProperty(JavaScriptValue.FromInt32(0))).ToString());
System.Diagnostics.Trace.WriteLine("Return Value[1] = " + (returnValue.GetIndexedProperty(JavaScriptValue.FromInt32(1))).ToBoolean());
System.Diagnostics.Trace.WriteLine("szWelcomMessage = " + szWelcomMessage);
System.Diagnostics.Trace.WriteLine("szWhoamI = " + szWhoamI);
bSuccess = true;
}
finally
{
if (true == bSuccess)
{
System.Diagnostics.Trace.WriteLine("Success");
}
else
{
System.Diagnostics.Trace.WriteLine("Error");
}
}
}
public async Task Run(string[] arguments)
{
try
{
using (JavaScriptRuntime runtime = JavaScriptRuntime.Create())
{
// Create a context. Note that if we had wanted to start debugging from the very
// beginning, we would have called JsStartDebugging right after context is create
JavaScriptContext context = runtime.CreateContext();
// Now set the execution context as being the current one on this thread.
using (new JavaScriptContext.Scope(context))
{
var hostObject = JavaScriptValue.CreateObject();
// Create an object called 'host' and set it on the global object.
var hostPropertyId = JavaScriptPropertyId.FromString("host");
JavaScriptValue.GlobalObject.SetProperty(hostPropertyId, hostObject, true);
// Register a bunch of callbacks on the 'host' object so that the JS code can call into C# code.
this.DefineHostCallback(hostObject, "echo", this.hostFunctions.EchoDelegate, IntPtr.Zero);
//this.DefineHostCallback(hostObject, "runScript", this.hostFunctions.RunScriptDelegate, IntPtr.Zero);
// Now register some async callbacks.
this.DefineHostCallback(hostObject, "doSuccessfulWork", this.hostFunctions.DoSuccessfulWorkDelegate, IntPtr.Zero);
this.DefineHostCallback(
hostObject,
"doUnsuccessfulWork",
this.hostFunctions.DoUnsuccessfulWorkDelegate,
IntPtr.Zero);
this.DefineHostCallback(hostObject, "getUrl", this.hostFunctions.GetUrlDelegate, IntPtr.Zero);
// Tell Chakra how to handle promises.
JavaScriptRuntime.SetPromiseContinuationCallback(this.jsTaskScheduler.PromiseContinuationCallback, IntPtr.Zero);
// Everything is setup, so we can go and use the engine now.
try
{
var javaScriptSourceContext = JavaScriptSourceContext.FromIntPtr(IntPtr.Zero);
// Load and execute the JavaScript file.
var script = File.ReadAllText(arguments[0]);
var result = JavaScriptContext.RunScript(
script,
javaScriptSourceContext + 0,
arguments[0]);
// Start pumping the task queue so that promise continuations will be processed.
// Note that this must be done after the task queue has been initially filled.
var completion = this.jsTaskScheduler.PumpMessages();
// If the result was a promise, convert it into a C# Task and await its result.
// Note that this could be simplified so that the
if (IsPromise(result))
{
Console.WriteLine("Script returned a promise, awaiting it.");
result = await this.ConvertPromiseToTask(result);
}
Console.WriteLine($"Script result: {result.ConvertToString().ToString()}");
// Call the 'sayHello' method on the object which was returned from the script.
await this.ConvertPromiseToTask(
result.GetProperty(JavaScriptPropertyId.FromString("sayHello"))
.CallFunction(JavaScriptValue.GlobalObject, JavaScriptValue.FromString("do a barrel roll!")));
// Call the 'add' method, which is not an async method
var addResult = result.GetProperty(JavaScriptPropertyId.FromString("add"))
.CallFunction(
JavaScriptValue.GlobalObject,
JavaScriptValue.FromInt32(78),
JavaScriptValue.FromInt32(22));
Console.WriteLine($"In C# land: 78 + 22 = {addResult.ConvertToNumber().ToDouble()}");
// Wait for the task pump to complete.
await completion;
}
catch (JavaScriptScriptException exception)
{
var messageValue = exception.Error.GetProperty(JavaScriptPropertyId.FromString("message"));
Console.Error.WriteLine("exception: {0}", messageValue.ToString());
}
catch (Exception e)
{
Console.Error.WriteLine("failed to run script: {0}", e.Message);
}
}
}
}
catch (Exception e)
{
Console.Error.WriteLine("fatal error: internal error: {0}.", e.Message);
}
Console.WriteLine("Press any key to exit.");
Console.ReadKey();
}
private JavaScriptErrorCode FetchImportedModuleFromScript(JavaScriptSourceContext sourceContext, JavaScriptValue source, out JavaScriptModuleRecord result)
{
System.Diagnostics.Debug.WriteLine("FetchImportedModuleFromScriptDelegate start");
result = new JavaScriptModuleRecord();
return(JavaScriptErrorCode.NoError);
}
private JavaScriptErrorCode FetchImportedModuleFromScript(JavaScriptSourceContext sourceContext, JavaScriptValue source, out JavaScriptModuleRecord result)
{
// Debug.Log("FetchImportedModuleFromScriptDelegate start");
result = new JavaScriptModuleRecord();
return(JavaScriptErrorCode.NoError);
}