/// <summary>
/// Executes a script, automatically storing the script value within an ExternalArrayBuffer.
/// </summary>
/// <remarks>
/// This extension method exists for simplicity.
/// </remarks>
/// <param name="jsrt"></param>
/// <param name="script"></param>
/// <param name="sourceContext"></param>
/// <param name="sourceUrl"></param>
/// <param name="parseAttributes"></param>
/// <param name="result"></param>
/// <returns>A JavaScriptValueSafeHandle containing the result.</returns>
public static JavaScriptValueSafeHandle JsRunScript(this IJavaScriptEngine jsrt, string script, JavaScriptSourceContext sourceContext = default(JavaScriptSourceContext), string sourceUrl = null, JavaScriptParseScriptAttributes parseAttributes = JavaScriptParseScriptAttributes.None)
{
var ptrScript = Marshal.StringToHGlobalAnsi(script);
JavaScriptObjectFinalizeCallback callback = (IntPtr ptr) =>
{
//Release pinned string.
Marshal.FreeHGlobal(ptrScript);
};
var scriptHandle = jsrt.JsCreateExternalArrayBuffer(ptrScript, (uint)script.Length, callback, IntPtr.Zero);
if (sourceContext == default(JavaScriptSourceContext))
{
sourceContext = JavaScriptSourceContext.None;
}
JavaScriptValueSafeHandle sourceUrlHandle;
if (string.IsNullOrWhiteSpace(sourceUrl))
{
sourceUrl = "[eval code]";
}
sourceUrlHandle = jsrt.JsCreateString(EvalSourceUrl, (ulong)EvalSourceUrl.Length);
if (parseAttributes == default(JavaScriptParseScriptAttributes))
{
parseAttributes = JavaScriptParseScriptAttributes.None;
}
try
{
return(jsrt.JsRun(scriptHandle, sourceContext, sourceUrlHandle, parseAttributes));
}
finally
{
//Release variables created during this operation.
sourceUrlHandle.Dispose();
scriptHandle.Dispose();
}
}
public void JsRunDoesRun()
{
var script = "(()=>{return 6*7;})()";
string sourceUrl = "[eval code]";
using (var runtimeHandle = Engine.JsCreateRuntime(JavaScriptRuntimeAttributes.None, null))
{
using (var contextHandle = Engine.JsCreateContext(runtimeHandle))
{
Engine.JsSetCurrentContext(contextHandle);
IntPtr ptrScript = Marshal.StringToHGlobalAnsi(script);
try
{
var scriptHandle = Engine.JsCreateExternalArrayBuffer(ptrScript, (uint)script.Length, null, IntPtr.Zero);
JavaScriptSourceContext sourceContext = JavaScriptSourceContext.None;
var sourceUrlHandle = Engine.JsCreateString(sourceUrl, (ulong)sourceUrl.Length);
var resultHandle = Engine.JsRun(scriptHandle, sourceContext, sourceUrlHandle, JavaScriptParseScriptAttributes.None);
Assert.True(resultHandle != JavaScriptValueSafeHandle.Invalid);
var handleType = Engine.JsGetValueType(resultHandle);
Assert.True(handleType == JsValueType.Number);
var resultValue = Engine.JsNumberToInt(resultHandle);
Assert.True(resultValue == 42);
resultHandle.Dispose();
sourceUrlHandle.Dispose();
scriptHandle.Dispose();
}
finally
{
Marshal.FreeHGlobal(ptrScript);
}
}
}
}