/// <summary>
/// Evaluate JavaScript in specified window, and with specified scope.
/// Throws GeckoJavaScriptException on error.
/// </summary>
/// <param name="javascript">The javascript to run.</param>
/// <param name="window">The window to execuate javascript in. (ie. the global object)</param>
/// <param name="scope">object to use as scope.</param>
/// <returns>The return value of the script as a JsVal</returns>
public JsVal EvaluateScript(string javascript, nsISupports window, nsISupports scope)
{
string msg = String.Empty;
JsVal exceptionJsVal = default(JsVal);
IntPtr globalObject = ConvertCOMObjectToJSObject(window);
using (new JSAutoCompartment(ContextPointer, globalObject))
{
var old = SpiderMonkey.JS_SetErrorReporter(SpiderMonkey.JS_GetRuntime(ContextPointer),
(cx, message, report) =>
{
var exception = SpiderMonkey.JS_GetPendingException(ContextPointer);
if (exception != IntPtr.Zero)
{
exceptionJsVal = JsVal.FromPtr(exception);
}
msg = message;
});
try
{
var retJsVal = new JsVal();
bool ret;
// If not running in window scope.
if (window != scope)
{
var scopeJSVal = JsVal.FromPtr(ConvertCOMObjectToJSObject(scope));
if (!SpiderMonkey.JS_SetProperty(ContextPointer, globalObject, "__RequestedScope", scopeJSVal))
{
throw new GeckoException("Failed to set __RequestedScope Property.");
}
javascript = InsertReturnStatement(javascript);
string s = "(function() { " + javascript + " }).call(this.__RequestedScope)";
ret = SpiderMonkey.JS_EvaluateScript(ContextPointer, s, (uint)s.Length, "script", 1,
ref retJsVal);
}
else
{
ret = SpiderMonkey.JS_EvaluateScript(ContextPointer, javascript, (uint)javascript.Length,
"script", 1, ref retJsVal);
}
if (ret)
{
return(retJsVal);
}
msg += GetStackTrace(globalObject, exceptionJsVal);
throw new GeckoJavaScriptException(String.Format("JSError : {0}", msg));
}
finally
{
SpiderMonkey.JS_SetErrorReporter(SpiderMonkey.JS_GetRuntime(ContextPointer), old);
}
}
}
/// <summary>
/// Evaluate JavaScript in specified window, and with specified scope.
/// Throws GeckoJavaScriptException on error.
/// </summary>
/// <param name="javascript">The javascript to run.</param>
/// <param name="window">The window to execuate javascript in. (ie. the global object)</param>
/// <param name="scope">object to use as scope.</param>
/// <returns>The return value of the script as a JsVal</returns>
public JsVal EvaluateScript(string javascript, nsISupports window, nsISupports scope)
{
string msg = String.Empty;
JsVal exceptionJsVal = default(JsVal);
using (var globalObject = ConvertCOMObjectToJSObject(window))
using (new JSAutoCompartment(ContextPointer, globalObject.JSObject))
{
var retJsVal = new JsVal();
bool ret;
// If not running in window scope.
if (window != scope)
{
using (var scopeObject = ConvertCOMObjectToJSObject(scope))
{
var scopeJSVal = JsVal.FromPtr(scopeObject.JSObject);
var go = globalObject.JSObject;
if (!SpiderMonkey.JS_SetProperty(ContextPointer, ref go, "__RequestedScope",
ref scopeJSVal))
{
throw new GeckoException("Failed to set __RequestedScope Property.");
}
javascript = InsertReturnStatement(javascript);
string s = "(function() { " + javascript + " }).call(this.__RequestedScope)";
ret = SpiderMonkey.JS_EvaluateScript(ContextPointer, s, (uint)s.Length, "script", 1,
ref retJsVal);
}
}
else
{
ret = SpiderMonkey.JS_EvaluateScript(ContextPointer, javascript, (uint)javascript.Length,
"script", 1, ref retJsVal);
}
if (ret)
{
return(retJsVal);
}
var exception = SpiderMonkey.JS_GetPendingException(ContextPointer);
if (exception != IntPtr.Zero)
{
exceptionJsVal = JsVal.FromPtr(exception);
}
msg += exceptionJsVal.ToString();
msg += SpiderMonkey.GetStackTrace(ContextPointer, globalObject.JSObject, exceptionJsVal);
throw new GeckoJavaScriptException($"JSError : {msg}");
}
}
private string GetStackTrace(IntPtr globalObject, JsVal exceptionJsVal)
{
if (!exceptionJsVal.IsObject)
{
return(String.Empty);
}
if (!SpiderMonkey.JS_SetProperty(ContextPointer, globalObject, "__RequestedScope", exceptionJsVal))
{
throw new GeckoException("Failed to set __RequestedScope Property.");
}
const string s = "(function() { " + "return this.stack" + " }).call(this.__RequestedScope)";
var retJsVal = new JsVal();
var success = SpiderMonkey.JS_EvaluateScript(ContextPointer, s, (uint)s.Length, "script", 1, ref retJsVal);
return(!success ? String.Empty : String.Format(" StackTrace: {0}", retJsVal));
}
