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.DefaultObjectForContextOrNull(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);
}
/// <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);
}
/// <summary>
/// Create a AutoJSContext using the SafeJSContext.
/// If context is IntPtr.Zero use the SafeJSContext
/// </summary>
/// <param name="context"></param>
public AutoJSContext(IntPtr context)
{
// We can't just use nsIXPConnect::GetSafeJSContext(); because its marked as [noxpcom, nostdcall]
// TODO: Enhance IDL compiler to not generate methods for noxpcom, nostdcall tagged methods.
if (context == IntPtr.Zero)
{
context = GlobalJSContextHolder.SafeJSContext;
}
IntPtr globalObject = SpiderMonkey.CurrentGlobalOrNull(context);
if (globalObject == IntPtr.Zero)
{
globalObject = SpiderMonkey.DefaultObjectForContextOrNull(context);
if (globalObject == IntPtr.Zero)
{
throw new InvalidOperationException("JSContext don't store their default compartment object on the cx.");
}
_defaultCompartment = new JSAutoCompartment(context, globalObject);
}
_cx = context;
}
internal static IntPtr GetJSContextForDomWindow(nsIDOMWindow window)
{
IntPtr context = IntPtr.Zero;
nsIDOMEventTarget eventTarget = window.GetWindowRootAttribute();
try
{
context = eventTarget.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.DefaultObjectForContextOrNull(cx);
if (pGlobal != IntPtr.Zero)
{
using (var auto = new AutoJSContext(cx))
{
using (ComPtr <nsISupports> global = auto.GetGlobalNsObject())
{
if (global != null)
{
var domWindow = Xpcom.QueryInterface <nsIDOMWindow>(global.Instance);
if (domWindow != null)
{
try
{
IntPtr pUnkTest = Marshal.GetIUnknownForObject(domWindow.GetWindowAttribute());
Marshal.Release(pUnkTest);
if (pUnk == pUnkTest)
{
_windowContexts.Add(pUnk, cx);
context = cx;
break;
}
}
finally
{
Xpcom.FreeComObject(ref domWindow);
}
}
}
}
}
}
}
}
}
}
finally
{
if (eventTarget != null)
{
Xpcom.FreeComObject(ref eventTarget);
}
}
return(context);
}
