private static List<SciterEventHandler> _attached_handlers = new List<SciterEventHandler>(); // we keep a copy of all attached instances to guard from GC removal
#endregion Fields
#region Constructors
public SciterEventHandler()
{
_proc = EventProc; Name = this.GetType().FullName;
}
// Notification handler
private uint HandleNotification(IntPtr ptrNotification, IntPtr callbackParam)
{
SciterXDef.SCITER_CALLBACK_NOTIFICATION scn = (SciterXDef.SCITER_CALLBACK_NOTIFICATION)Marshal.PtrToStructure(ptrNotification, typeof(SciterXDef.SCITER_CALLBACK_NOTIFICATION));
switch (scn.code)
{
case SciterXDef.SC_LOAD_DATA:
SciterXDef.SCN_LOAD_DATA sld = (SciterXDef.SCN_LOAD_DATA)Marshal.PtrToStructure(ptrNotification, typeof(SciterXDef.SCN_LOAD_DATA));
return((uint)OnLoadData(sld));
case SciterXDef.SC_DATA_LOADED:
SciterXDef.SCN_DATA_LOADED sdl = (SciterXDef.SCN_DATA_LOADED)Marshal.PtrToStructure(ptrNotification, typeof(SciterXDef.SCN_DATA_LOADED));
OnDataLoaded(sdl);
return(0);
case SciterXDef.SC_ATTACH_BEHAVIOR:
SciterXDef.SCN_ATTACH_BEHAVIOR sab = (SciterXDef.SCN_ATTACH_BEHAVIOR)Marshal.PtrToStructure(ptrNotification, typeof(SciterXDef.SCN_ATTACH_BEHAVIOR));
SciterEventHandler elementEvh;
bool res = OnAttachBehavior(new SciterElement(sab.elem), Marshal.PtrToStringAnsi(sab.behaviorName), out elementEvh);
if (res)
{
SciterXBehaviors.FPTR_ElementEventProc proc = elementEvh._proc;
IntPtr ptrProc = Marshal.GetFunctionPointerForDelegate(proc);
IntPtr EVENTPROC_OFFSET = Marshal.OffsetOf(typeof(SciterXDef.SCN_ATTACH_BEHAVIOR), "elementProc");
IntPtr EVENTPROC_OFFSET2 = Marshal.OffsetOf(typeof(SciterXDef.SCN_ATTACH_BEHAVIOR), "elementTag");
Marshal.WriteIntPtr(ptrNotification, EVENTPROC_OFFSET.ToInt32(), ptrProc);
Marshal.WriteInt32(ptrNotification, EVENTPROC_OFFSET2.ToInt32(), 1234);
return(1);
}
return(0);
case SciterXDef.SC_ENGINE_DESTROYED:
if (_window_evh != null)
{
_api.SciterWindowDetachEventHandler(_hwnd, _window_evh._proc, IntPtr.Zero);
_window_evh = null;
}
OnEngineDestroyed();
return(0);
case SciterXDef.SC_POSTED_NOTIFICATION:
SciterXDef.SCN_POSTED_NOTIFICATION spn = (SciterXDef.SCN_POSTED_NOTIFICATION)Marshal.PtrToStructure(ptrNotification, typeof(SciterXDef.SCN_POSTED_NOTIFICATION));
IntPtr lreturn = IntPtr.Zero;
if (spn.wparam.ToInt32() == INVOKE_NOTIFICATION)
{
GCHandle handle = GCHandle.FromIntPtr(spn.lparam);
Action cbk = (Action)handle.Target;
cbk();
handle.Free();
}
else
{
lreturn = OnPostedNotification(spn.wparam, spn.lparam);
}
IntPtr OFFSET_LRESULT = Marshal.OffsetOf(typeof(SciterXDef.SCN_POSTED_NOTIFICATION), "lreturn");
Marshal.WriteIntPtr(ptrNotification, OFFSET_LRESULT.ToInt32(), lreturn);
return(0);
case SciterXDef.SC_GRAPHICS_CRITICAL_FAILURE:
SciterXDef.SCN_GRAPHICS_CRITICAL_FAILURE cgf = (SciterXDef.SCN_GRAPHICS_CRITICAL_FAILURE)Marshal.PtrToStructure(ptrNotification, typeof(SciterXDef.SCN_GRAPHICS_CRITICAL_FAILURE));
OnGraphicsCriticalFailure(cgf.hwnd);
return(0);
default:
Debug.Assert(false);
break;
}
return(0);
}
