private static void HandleInvokeFailure(IntPtr cx, IntPtr jsObject, string name)
{
var exception = SpiderMonkey.JS_GetPendingException(cx);
if (exception != IntPtr.Zero)
{
var exceptionJsVal = JsVal.FromPtr(exception);
string st = string.Empty;
try
{
st = GetStackTrace(cx, jsObject, exceptionJsVal);
}
catch
{
// ignored
// we failed to get stack trace info, but still want to continue reporting exception.
}
var msg = exceptionJsVal.ToString();
msg += st;
throw new GeckoException($"Calling function '{name}' failed: '{msg}'");
}
throw new GeckoException($"Failed to call function '{name}'");
}
/// <summary>
/// JS_CallFunctionName without args
/// </summary>
/// <param name="cx"></param>
/// <param name="jsObject"></param>
/// <param name="name"></param>
/// <returns></returns>
public static JsVal JS_CallFunctionName(IntPtr cx, IntPtr jsObject, string name)
{
bool result;
JsVal value;
int parameterCount = 0;
var mutableHandle = new MutableHandleValue();
if (!JS_CallFunctionName(cx, ref jsObject, name, ref parameterCount, ref mutableHandle))
{
HandleInvokeFailure(cx, jsObject, name);
}
value = JsVal.FromPtr(mutableHandle.Handle);
return(value);
}
public static JsVal JS_CallFunctionValue(IntPtr cx, IntPtr jsObject, JsVal func)
{
var mutableHandle = new MutableHandleValue();
bool success;
using (var args = new HandleValueArray(0, new JsVal[0]))
success = JS_CallFunctionValue(cx, jsObject, ref func, args.Ptr, ref mutableHandle);
if (success)
{
return(JsVal.FromPtr(mutableHandle.Handle));
}
HandleInvokeFailure(cx, jsObject, func.ToString());
throw new Exception("HandleInvokeFailure always throws execption, so this line is never reached.");
}
public static bool JS_ExecuteScript(IntPtr cx, string script, out JsVal jsval)
{
jsval = default(JsVal);
var scriptHandle = new MutableHandle();
if (!JS_CompileUCScript(cx, script, script.Length, GetCompileOptions(cx), ref scriptHandle))
{
throw new GeckoException("Failed to compile script.");
}
var val = new MutableHandleValue();
var handle = scriptHandle.Handle;
if (!JS_ExecuteScript(cx, ref handle, ref val))
{
return(false);
}
jsval = JsVal.FromPtr(val.Handle);
return(true);
}