public bool EvaluateTrustedScript(string jsScript, out string result)
{
throw new NotImplementedException();
var ptr = new JsVal();
IntPtr globalObject = SpiderMonkey.JS_GetGlobalForScopeChain(_cx);
bool ret;
IntPtr systemGlobalObject = SpiderMonkey.JS_GetGlobalForScopeChain(GlobalJSContextHolder.BackstageJSContext);
// Compartments have to be entered and left in LIFO order.
bool inSystemCompartment = false;
IntPtr oldCompartment = IntPtr.Zero;
try
{
// Allow access to any object on page.
oldCompartment = SpiderMonkey.JS_EnterCompartment(_cx, systemGlobalObject);
// At any time, a JSContext has a current (possibly-NULL) compartment.
inSystemCompartment = true;
ret = SpiderMonkey.JS_EvaluateScript(_cx, globalObject, jsScript, (uint)jsScript.Length, "script", 1, ref ptr);
result = ConvertValueToString(ptr);
}
finally
{
if (inSystemCompartment)
{
SpiderMonkey.JS_LeaveCompartment(_cx, oldCompartment);
}
}
return(ret);
}
private static IntPtr GetContextByName(string contextName)
{
Xpcom.AssertCorrectThread();
IntPtr rt = Runtime;
IntPtr iterp = IntPtr.Zero;
IntPtr cx;
while ((cx = SpiderMonkey.JS_ContextIterator(rt, ref iterp)) != IntPtr.Zero)
{
IntPtr global = SpiderMonkey.JS_GetGlobalObject(cx);
if (global != IntPtr.Zero)
{
IntPtr classp = SpiderMonkey.JS_GetClass(global);
// get class name
if (classp != IntPtr.Zero)
{
string className = Marshal.PtrToStringAnsi(Marshal.ReadIntPtr(classp));
if (className == contextName)
{
return(cx);
}
}
}
}
return(IntPtr.Zero);
}
internal string ConvertValueToString(JsVal value)
{
if (value.IsString)
{
var v = Xpcom.XPConnect.Instance.JSValToVariant(ContextPointer, ref value);
return(nsString.Get(v.GetAsAString));
}
// Fallback for non string JsVal's
// If the JsVal is not a string convert it to a JSString
// then convert the JSString to a utf8 string.
// NOTE: This fallback isn't ideal and may cause unicode replacement chars to appear.
IntPtr jsp = SpiderMonkey.ToStringSlow(ContextPointer, value);
var utf8StrPtr = SpiderMonkey.JS_EncodeStringToUTF8(ContextPointer, jsp);
if (utf8StrPtr != IntPtr.Zero)
{
try
{
var length = SpiderMonkey.JS_GetStringEncodingLength(ContextPointer, jsp);
byte[] result = new byte[length];
Marshal.Copy(utf8StrPtr, result, 0, length);
return(Encoding.UTF8.GetString(result, 0, length));
}
finally
{
SpiderMonkey.JS_Free(ContextPointer, utf8StrPtr);
}
}
return(null);
}
public ComPtr <nsISupports> GetGlobalNsObject()
{
IntPtr globalObject = SpiderMonkey.CurrentGlobalOrNull(_cx);
if (globalObject != IntPtr.Zero)
{
Guid guid = typeof(nsISupports).GUID;
IntPtr pUnk = IntPtr.Zero;
try
{
pUnk = Xpcom.XPConnect.Instance.WrapJS(_cx, globalObject, ref guid);
object comObj = Xpcom.GetObjectForIUnknown(pUnk);
try
{
return(Xpcom.QueryInterface <nsISupports>(comObj).AsComPtr());
}
finally
{
Xpcom.FreeComObject(ref comObj);
}
}
finally
{
if (pUnk != IntPtr.Zero)
{
Marshal.Release(pUnk);
}
}
}
return(null);
}
/// <summary>
/// Working similar to SelectSingle but not throwing exceptions on error (simply return first result)
/// </summary>
/// <param name="xpath"></param>
/// <returns></returns>
public GeckoNode SelectFirst(string xpath)
{
var r = EvaluateXPathInternal(xpath);
nsIDOMNode singleNode = null;
using (var context = new AutoJSContext())
{
var jsObject = context.ConvertCOMObjectToJSObject((nsISupports)r);
// TODO: (Idenally I would generate these calls via a webidl-> C# compiler but for now just do it via manually written spidermonkey calls..)
var resultType = SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject, "resultType").ToInteger();
switch (resultType)
{
case nsIDOMXPathResultConsts.UNORDERED_NODE_ITERATOR_TYPE:
singleNode = (nsIDOMNode)SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext", new JsVal[0]).ToComObject(context.ContextPointer);
break;
case nsIDOMXPathResultConsts.FIRST_ORDERED_NODE_TYPE:
case nsIDOMXPathResultConsts.ANY_UNORDERED_NODE_TYPE:
singleNode = (nsIDOMNode)SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject, "singleNodeValue").ToComObject(context.ContextPointer);
break;
}
var ret = singleNode.Wrap(GeckoNode.Create);
Xpcom.FreeComObject(ref r);
return(ret);
}
}
/// <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 the current context.
/// </summary>
/// <param name="jsScript"></param>
/// <param name="thisObject">a nsISupports com object that this is set too.</param>
/// <param name="result"></param>
/// <returns></returns>
public bool EvaluateScript(string jsScript, nsISupports thisObject, out string result)
{
try
{
var ptr = new JsVal();
IntPtr globalObject = ConvertCOMObjectToJSObject(thisObject);
using (new JSAutoCompartment(_cx, globalObject))
{
bool ret = SpiderMonkey.JS_EvaluateScript(_cx, globalObject, jsScript, (uint)jsScript.Length, "script", 1, ref ptr);
if (GetComponentsObject().GetUtilsAttribute().IsXrayWrapper(ref ptr))
{
ptr = GetComponentsObject().GetUtilsAttribute().WaiveXrays(ref ptr, _cx);
}
result = ret ? ConvertValueToString(ptr) : null;
return(ret);
}
}
catch (Exception e)
{
Console.WriteLine("Exception {0}", e);
result = String.Empty;
return(false);
}
}
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>
/// Converts to COM object without null check
/// </summary>
/// <returns></returns>
private object ToComObjectInternal()
{
var context = AutoJSContext.Current;
if (context == null)
{
throw new Exception("AutoJSContext not set.");
}
{
var jsObject = SpiderMonkey.JS_ValueToObject(context.ContextPointer, this);
var guid = typeof(nsISupports).GUID;
var pUnk = IntPtr.Zero;
try
{
pUnk = Xpcom.XPConnect.Instance.WrapJS(context.ContextPointer, jsObject, ref guid);
var comObj = Xpcom.GetObjectForIUnknown(pUnk);
return(comObj);
}
finally
{
if (pUnk != IntPtr.Zero)
{
Marshal.Release(pUnk);
}
}
}
}
public void Dispose()
{
_securityManager.PopContextPrincipal(_cx);
_contextStack.Pop();
SpiderMonkey.JS_EndRequest(_cx);
}
/// <summary>
/// Evaluate javascript in the current context.
/// </summary>
/// <param name="jsScript"></param>
/// <param name="jsval"></param>
/// <returns></returns>
public bool EvaluateScript(string jsScript, out string result)
{
var ptr = new JsVal();
bool ret = SpiderMonkey.JS_EvaluateScript(_cx, GetGlobalObject(), jsScript, (uint)jsScript.Length, "script", 1, ref ptr);
result = ret ? ConvertValueToString(ptr) : null;
return(ret);
}
public override string ToString()
{
using (AutoJSContext context = new AutoJSContext())
{
IntPtr jsString = SpiderMonkey.JS_ValueToString(context.ContextPointer, this);
return(Marshal.PtrToStringAnsi(SpiderMonkey.JS_EncodeString(context.ContextPointer, jsString)));
}
}
private IntPtr GetGlobalObject()
{
IntPtr globalObject = SpiderMonkey.CurrentGlobalOrNull(_cx);
if (globalObject == IntPtr.Zero)
{
throw new ObjectDisposedException(this.GetType().Name);
}
return(globalObject);
}
public static IntPtr GetJSContextForDomWindow(nsIDOMWindow window)
{
IntPtr context = window.GetWindowRootAttribute().GetJSContextForEventHandlers();
if (context == IntPtr.Zero)
{
IntPtr pUnk = Marshal.GetIUnknownForObject(window);
Marshal.Release(pUnk);
if (!_windowContexts.TryGetValue(pUnk, out context))
{
context = IntPtr.Zero;
IntPtr cx;
IntPtr iterp = IntPtr.Zero;
IntPtr rt = Runtime;
while ((cx = SpiderMonkey.JS_ContextIterator(rt, ref iterp)) != IntPtr.Zero)
{
IntPtr pGlobal = SpiderMonkey.JS_GetGlobalObject(cx);
if (pGlobal != IntPtr.Zero)
{
using (var auto = new AutoJSContext(cx))
{
nsISupports global = auto.GetGlobalNsObject();
if (global != null)
{
var domWindow = Xpcom.QueryInterface <nsIDOMWindow>(global);
if (domWindow != null)
{
try
{
IntPtr pUnkTest = Marshal.GetIUnknownForObject(domWindow.GetWindowAttribute());
Marshal.Release(pUnkTest);
if (pUnk == pUnkTest)
{
_windowContexts.Add(pUnk, cx);
context = cx;
break;
}
}
finally
{
Marshal.ReleaseComObject(domWindow);
}
}
}
}
}
}
}
}
return(context);
}
internal string ConvertValueToString(JsVal value)
{
// OLD SLOW CODE
// if (value.IsString)
// {
// var v = Xpcom.XPConnect.Instance.JSValToVariant(ContextPointer, ref value);
// return nsString.Get(v.GetAsAString);
//}
return(SpiderMonkey.JsValToString(this._cx, value));
}
/// <summary>
/// Evaluate javascript in the current context.
/// </summary>
/// <param name="jsScript"></param>
/// <param name="jsval"></param>
/// <returns></returns>
public bool EvaluateScript(string jsScript, out string result)
{
var ptr = new JsVal();
IntPtr globalObject = SpiderMonkey.JS_GetGlobalForScopeChain(_cx);
bool ret = SpiderMonkey.JS_EvaluateScript(_cx, globalObject, jsScript, (uint)jsScript.Length, "script", 1, ref ptr);
IntPtr jsStringPtr = SpiderMonkey.JS_ValueToString(_cx, ptr);
result = Marshal.PtrToStringAnsi(SpiderMonkey.JS_EncodeString(_cx, jsStringPtr));
return(ret);
}
/// <summary>
/// Evaluate javascript in the current context.
/// </summary>
/// <param name="jsScript"></param>
/// <param name="jsval"></param>
/// <returns></returns>
public bool EvaluateScript(string jsScript, out string result)
{
var ptr = new JsVal();
bool ret = SpiderMonkey.JS_EvaluateScript(_cx, GetGlobalObject(), jsScript, (uint)jsScript.Length, "script", 1, ref ptr);
// TODO: maybe getting JS_EvaluateScriptForPrincipals working would increase priviliges of the running script.
//bool ret = SpiderMonkey.JS_EvaluateScriptForPrincipals(_cx, globalObject, ..., jsScript, (uint)jsScript.Length,"script", 1, ref ptr);
result = ret ? ConvertValueToString(ptr) : null;
return(ret);
}
public void Dispose()
{
if (!_isDisposed)
{
_isDisposed = true;
if (_cx != IntPtr.Zero)
{
SpiderMonkey.JS_LeaveCompartment(_cx, _oldCompartment);
}
GC.SuppressFinalize(this);
}
}
/// <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}");
}
}
public void Dispose()
{
if (_isDisposed)
{
return;
}
_isDisposed = true;
if (_cx != IntPtr.Zero)
{
SpiderMonkey.JS_RequestLeaveCompartment(_cx, _oldCompartment);
}
_obj.Dispose();
GC.SuppressFinalize(this);
}
/// <summary>
/// Evaluate javascript in the current context.
/// </summary>
/// <param name="jsScript"></param>
/// <param name="jsval"></param>
/// <returns></returns>
public bool EvaluateScript(string jsScript, out string result)
{
var ptr = new JsVal();
IntPtr globalObject = SpiderMonkey.JS_GetGlobalForScopeChain(_cx);
bool ret = SpiderMonkey.JS_EvaluateScript(_cx, globalObject, jsScript, (uint)jsScript.Length, "script", 1, ref ptr);
// TODO: maybe getting JS_EvaluateScriptForPrincipals working would increase priviliges of the running script.
//bool ret = SpiderMonkey.JS_EvaluateScriptForPrincipals(_cx, globalObject, ..., jsScript, (uint)jsScript.Length,"script", 1, ref ptr);
IntPtr jsStringPtr = SpiderMonkey.JS_ValueToString(_cx, ptr);
result = Marshal.PtrToStringAnsi(SpiderMonkey.JS_EncodeString(_cx, jsStringPtr));
return(ret);
}
/// <summary>
/// Add hooks to listen for new JSContext creation and store the context for later use.
/// </summary>
internal static void Initialize()
{
Xpcom.AssertCorrectThread();
if (!_isInitialized)
{
_isInitialized = true;
using (var runtimeService = new Gecko.Interop.ServiceWrapper <nsIJSRuntimeService>("@mozilla.org/js/xpc/RuntimeService;1"))
{
_originalContextCallback = SpiderMonkey.JS_SetContextCallback(Runtime, _globalContextCallback);
}
}
}
public GeckoNode SelectSingle(string xpath)
{
var r = EvaluateXPathInternal(xpath);
nsIDOMNode singleNode = null;
using (var context = new AutoJSContext(Window))
using (var jsObject = context.ConvertCOMObjectToJSObject((nsISupports)r))
{
// TODO: (Idenally I would generate these calls via a webidl-> C# compiler but for now just do it via manually written spidermonkey calls..)
var resultType = SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject.JSObject, "resultType").ToInteger();
#if PORTFF60
switch (resultType)
{
case nsIDOMXPathResultConsts.UNORDERED_NODE_ITERATOR_TYPE:
singleNode =
(nsIDOMNode)
SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext",
new JsVal[0]).ToComObject(context.ContextPointer);
var test =
(SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext",
new JsVal[0]));
if (!test.IsNull)
{
Xpcom.FreeComObject(ref singleNode);
Xpcom.FreeComObject(ref r);
throw new GeckoDomException("There are more than 1 nodes in Single selection");
}
break;
case nsIDOMXPathResultConsts.FIRST_ORDERED_NODE_TYPE:
case nsIDOMXPathResultConsts.ANY_UNORDERED_NODE_TYPE:
singleNode =
(nsIDOMNode)
SpiderMonkey.JS_GetProperty(context.ContextPointer, jsObject, "singleNodeValue")
.ToComObject(context.ContextPointer);
break;
}
#endif
throw new NotImplementedException();
}
#if PORTFF60
var ret = singleNode.Wrap(GeckoNode.Create);
Xpcom.FreeComObject(ref r);
return(ret);
#endif
}
/// <summary>
/// Helper method which attempts to find the global object in a Context.
/// </summary>
/// <returns>the Global object ptr or Null/Zero ptr if not found.</returns>
private IntPtr GetGlobalFromContext(IntPtr context)
{
IntPtr globalObject = SpiderMonkey.CurrentGlobalOrNull(context);
if (globalObject == IntPtr.Zero)
{
globalObject = SpiderMonkey.DefaultObjectForContextOrNull(context);
if (globalObject == IntPtr.Zero)
{
return(IntPtr.Zero);
}
}
return(globalObject);
}
public JSAutoCompartment(IntPtr context, IntPtr obj)
{
if (context == IntPtr.Zero)
{
throw new ArgumentNullException("context");
}
if (context == IntPtr.Zero)
{
throw new ArgumentNullException("obj");
}
_obj = obj;
_oldCompartment = SpiderMonkey.JS_EnterCompartment(context, _obj);
_cx = context;
}
internal string ConvertValueToString(JsVal value)
{
IntPtr jsp = SpiderMonkey.JS_ValueToString(_cx, value);
if (jsp != IntPtr.Zero)
{
uint length;
var chars = SpiderMonkey.JS_GetStringCharsAndLength(_cx, jsp, out length);
if (chars != IntPtr.Zero)
{
return(Marshal.PtrToStringUni(chars, (int)length));
}
}
return(null);
}
public IEnumerator <GeckoNode> GetEnumerator()
{
using (var context = new AutoJSContext())
{
var jsObject = context.ConvertCOMObjectToJSObject((nsISupports)xpathResult);
JsVal jsVal;
do
{
while (
!(jsVal = SpiderMonkey.JS_CallFunctionName(context.ContextPointer, jsObject, "iterateNext")).IsNull)
{
yield return((jsVal.ToComObject(context.ContextPointer) as nsIDOMNode).Wrap(GeckoNode.Create));
}
} while (!jsVal.IsNull);
}
}
/// <summary>
/// Create a AutoJSContext using the SafeJSContext.
/// If context is IntPtr.Zero use the SafeJSContext
/// </summary>
/// <param name="context"></param>
public AutoJSContext(IntPtr context)
{
if (context == IntPtr.Zero)
{
context = GlobalJSContextHolder.SafeJSContext;
}
_cx = context;
// TODO: calling BeginRequest may not be neccessary anymore.
// begin a new request
SpiderMonkey.JS_BeginRequest(_cx);
// TODO: pushing the context onto the context stack may not be neccessary anymore.
// push the context onto the context stack
_contextStack = Xpcom.GetService <nsIJSContextStack>("@mozilla.org/js/xpc/ContextStack;1");
_contextStack.Push(_cx);
}
public JSAutoCompartment(AutoJSContext context, nsISupports comObject)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (context.ContextPointer == IntPtr.Zero)
{
throw new ArgumentException("context has Null ContextPointer");
}
if (context == null)
{
throw new ArgumentNullException("comObject");
}
_obj = context.ConvertCOMObjectToJSObject(comObject);
_cx = context.ContextPointer;
_oldCompartment = SpiderMonkey.JS_EnterCompartment(_cx, _obj);
}
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));
}
